[edk2] [PATCH v2 1/6] MdeModulePkg: Delete Tcp4Dxe in MdeModulePkg.

Wang, Jian J jian.j.wang at intel.com
Wed Dec 19 20:59:54 PST 2018



Reviewed-by: Jian J Wang <jian.j.wang at intel.com>


> -----Original Message-----
> From: Fu, Siyuan
> Sent: Thursday, December 20, 2018 9:41 AM
> To: edk2-devel at lists.01.org
> Cc: Wang, Jian J <jian.j.wang at intel.com>; Wu, Hao A <hao.a.wu at intel.com>;
> Ni, Ruiyu <ruiyu.ni at intel.com>; Zeng, Star <star.zeng at intel.com>; Wu, Jiaxin
> <jiaxin.wu at intel.com>
> Subject: [PATCH v2 1/6] MdeModulePkg: Delete Tcp4Dxe in MdeModulePkg.
> 
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1278
> 
> This patch is to delete the Tcp4Dxe driver in MdeModulePkg. The driver
> will not be maintained and can't co-work with the dual-stack TcpDxe in
> NetworkPkg.
> 
> People should use below NetworkPkg drivers instead:
>   NetworkPkg/TcpDxe/TcpDxe.inf
> Which is actively maintained with more bug fixes and new feature support.
> 
> Cc: Jian J Wang <jian.j.wang at intel.com>
> Cc: Hao Wu <hao.a.wu at intel.com>
> Cc: Ruiyu Ni <ruiyu.ni at intel.com>
> Cc: Star Zeng <star.zeng at intel.com>
> Cc: Jiaxin Wu <jiaxin.wu at intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Siyuan Fu <siyuan.fu at intel.com>
> ---
> 
> Notes:
>     v2:
>     Break original patch to separate commits per module.
> 
>  MdeModulePkg/Universal/Network/Tcp4Dxe/ComponentName.c  |  433 ------
>  MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.c       | 1201 --------------
> --
>  MdeModulePkg/Universal/Network/Tcp4Dxe/SockInterface.c  |  990 ------------
> -
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c |  717 ----------
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.c     |  782 ----------
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Input.c      | 1497 --------------
> ------
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Io.c         |  112 --
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.c       |  674 ---------
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c       |  940 ------------
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.c     |  352 -----
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c     | 1238 ------------
> ----
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Timer.c      |  584 --------
>  MdeModulePkg/MdeModulePkg.dsc                           |    1 -
>  MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.h       |  131 --
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Socket.h         |  954 -------------
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.h     |  342 -----
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dxe.inf      |   94 --
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dxe.uni      |   23 -
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4DxeExtra.uni |   20 -
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Func.h       |  781 ----------
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.h       |  494 -------
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h     |  130 --
>  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h      |  357 -----
>  23 files changed, 12847 deletions(-)
> 
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/ComponentName.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/ComponentName.c
> deleted file mode 100644
> index f1227691ec21..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/ComponentName.c
> +++ /dev/null
> @@ -1,433 +0,0 @@
> -/** @file
> -  UEFI Component Name(2) protocol implementation for Tcp4Dxe driver.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#include "Tcp4Main.h"
> -
> -/**
> -  Retrieves a Unicode string that is the user readable name of the driver.
> -
> -  This function retrieves the user readable name of a driver in the form of a
> -  Unicode string. If the driver specified by This has a user readable name in
> -  the language specified by Language, then a pointer to the driver name is
> -  returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
> -  by This does not support the language specified by Language,
> -  then EFI_UNSUPPORTED is returned.
> -
> -  @param[in]  This              A pointer to the
> EFI_COMPONENT_NAME2_PROTOCOL or
> -                                EFI_COMPONENT_NAME_PROTOCOL instance.
> -
> -  @param[in]  Language          A pointer to a Null-terminated ASCII string
> -                                array indicating the language. This is the
> -                                language of the driver name that the caller is
> -                                requesting, and it must match one of the
> -                                languages specified in SupportedLanguages. The
> -                                number of languages supported by a driver is up
> -                                to the driver writer. Language is specified
> -                                in RFC 4646 or ISO 639-2 language code format.
> -
> -  @param[out]  DriverName       A pointer to the Unicode string to return.
> -                                This Unicode string is the name of the
> -                                driver specified by This in the language
> -                                specified by Language.
> -
> -  @retval EFI_SUCCESS           The Unicode string for the Driver specified by
> -                                This and the language specified by Language was
> -                                returned in DriverName.
> -
> -  @retval EFI_INVALID_PARAMETER Language is NULL.
> -
> -  @retval EFI_INVALID_PARAMETER DriverName is NULL.
> -
> -  @retval EFI_UNSUPPORTED       The driver specified by This does not support
> -                                the language specified by Language.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -TcpComponentNameGetDriverName (
> -  IN     EFI_COMPONENT_NAME_PROTOCOL  *This,
> -  IN     CHAR8                        *Language,
> -     OUT CHAR16                       **DriverName
> -  );
> -
> -
> -/**
> -  Retrieves a Unicode string that is the user readable name of the controller
> -  that is being managed by a driver.
> -
> -  This function retrieves the user readable name of the controller specified by
> -  ControllerHandle and ChildHandle in the form of a Unicode string. If the
> -  driver specified by This has a user readable name in the language specified by
> -  Language, then a pointer to the controller name is returned in ControllerName,
> -  and EFI_SUCCESS is returned.  If the driver specified by This is not currently
> -  managing the controller specified by ControllerHandle and ChildHandle,
> -  then EFI_UNSUPPORTED is returned.  If the driver specified by This does not
> -  support the language specified by Language, then EFI_UNSUPPORTED is
> returned.
> -
> -  @param[in]  This              A pointer to the
> EFI_COMPONENT_NAME2_PROTOCOL or
> -                                EFI_COMPONENT_NAME_PROTOCOL instance.
> -
> -  @param[in]  ControllerHandle  The handle of a controller that the driver
> -                                specified by This is managing.  This handle
> -                                specifies the controller whose name is to be
> -                                returned.
> -
> -  @param[in]  ChildHandle       The handle of the child controller to retrieve
> -                                the name of.  This is an optional parameter that
> -                                may be NULL.  It will be NULL for device
> -                                drivers.  It will also be NULL for a bus drivers
> -                                that wish to retrieve the name of the bus
> -                                controller.  It will not be NULL for a bus
> -                                driver that wishes to retrieve the name of a
> -                                child controller.
> -
> -  @param[in]  Language          A pointer to a Null-terminated ASCII string
> -                                array indicating the language.  This is the
> -                                language of the driver name that the caller is
> -                                requesting, and it must match one of the
> -                                languages specified in SupportedLanguages. The
> -                                number of languages supported by a driver is up
> -                                to the driver writer. Language is specified in
> -                                RFC 4646 or ISO 639-2 language code format.
> -
> -  @param[out]  ControllerName   A pointer to the Unicode string to return.
> -                                This Unicode string is the name of the
> -                                controller specified by ControllerHandle and
> -                                ChildHandle in the language specified by
> -                                Language from the point of view of the driver
> -                                specified by This.
> -
> -  @retval EFI_SUCCESS           The Unicode string for the user readable name in
> -                                the language specified by Language for the
> -                                driver specified by This was returned in
> -                                DriverName.
> -
> -  @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
> -
> -  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
> -                                EFI_HANDLE.
> -
> -  @retval EFI_INVALID_PARAMETER Language is NULL.
> -
> -  @retval EFI_INVALID_PARAMETER ControllerName is NULL.
> -
> -  @retval EFI_UNSUPPORTED       The driver specified by This is not currently
> -                                managing the controller specified by
> -                                ControllerHandle and ChildHandle.
> -
> -  @retval EFI_UNSUPPORTED       The driver specified by This does not support
> -                                the language specified by Language.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -TcpComponentNameGetControllerName (
> -  IN     EFI_COMPONENT_NAME_PROTOCOL  *This,
> -  IN     EFI_HANDLE                   ControllerHandle,
> -  IN     EFI_HANDLE                   ChildHandle        OPTIONAL,
> -  IN     CHAR8                        *Language,
> -     OUT CHAR16                       **ControllerName
> -  );
> -
> -
> -///
> -/// EFI Component Name Protocol
> -///
> -GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME_PROTOCOL
> gTcp4ComponentName = {
> -  TcpComponentNameGetDriverName,
> -  TcpComponentNameGetControllerName,
> -  "eng"
> -};
> -
> -///
> -/// EFI Component Name 2 Protocol
> -///
> -GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME2_PROTOCOL
> gTcp4ComponentName2 = {
> -  (EFI_COMPONENT_NAME2_GET_DRIVER_NAME)
> TcpComponentNameGetDriverName,
> -  (EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME)
> TcpComponentNameGetControllerName,
> -  "en"
> -};
> -
> -
> -GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE
> mTcpDriverNameTable[] = {
> -  {
> -    "eng;en",
> -    L"Tcp Network Service Driver"
> -  },
> -  {
> -    NULL,
> -    NULL
> -  }
> -};
> -
> -GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE
> *gTcpControllerNameTable = NULL;
> -
> -/**
> -  Retrieves a Unicode string that is the user readable name of the driver.
> -
> -  This function retrieves the user readable name of a driver in the form of a
> -  Unicode string. If the driver specified by This has a user readable name in
> -  the language specified by Language, then a pointer to the driver name is
> -  returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
> -  by This does not support the language specified by Language,
> -  then EFI_UNSUPPORTED is returned.
> -
> -  @param[in]  This              A pointer to the
> EFI_COMPONENT_NAME2_PROTOCOL or
> -                                EFI_COMPONENT_NAME_PROTOCOL instance.
> -
> -  @param[in]  Language          A pointer to a Null-terminated ASCII string
> -                                array indicating the language. This is the
> -                                language of the driver name that the caller is
> -                                requesting, and it must match one of the
> -                                languages specified in SupportedLanguages. The
> -                                number of languages supported by a driver is up
> -                                to the driver writer. Language is specified
> -                                in RFC 4646 or ISO 639-2 language code format.
> -
> -  @param[out]  DriverName       A pointer to the Unicode string to return.
> -                                This Unicode string is the name of the
> -                                driver specified by This in the language
> -                                specified by Language.
> -
> -  @retval EFI_SUCCESS           The Unicode string for the Driver specified by
> -                                This and the language specified by Language was
> -                                returned in DriverName.
> -
> -  @retval EFI_INVALID_PARAMETER Language is NULL.
> -
> -  @retval EFI_INVALID_PARAMETER DriverName is NULL.
> -
> -  @retval EFI_UNSUPPORTED       The driver specified by This does not support
> -                                the language specified by Language.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -TcpComponentNameGetDriverName (
> -  IN     EFI_COMPONENT_NAME_PROTOCOL  *This,
> -  IN     CHAR8                        *Language,
> -     OUT CHAR16                       **DriverName
> -  )
> -{
> -  return LookupUnicodeString2 (
> -           Language,
> -           This->SupportedLanguages,
> -           mTcpDriverNameTable,
> -           DriverName,
> -           (BOOLEAN) (This == &gTcp4ComponentName)
> -           );
> -}
> -
> -/**
> -  Update the component name for the Tcp4 child handle.
> -
> -  @param  Tcp4[in]                   A pointer to the EFI_TCP4_PROTOCOL.
> -
> -
> -  @retval EFI_SUCCESS                Update the ControllerNameTable of this
> instance successfully.
> -  @retval EFI_INVALID_PARAMETER      The input parameter is invalid.
> -
> -**/
> -EFI_STATUS
> -UpdateName (
> -  IN  EFI_TCP4_PROTOCOL             *Tcp4
> -  )
> -{
> -  EFI_STATUS                       Status;
> -  CHAR16                           HandleName[80];
> -  EFI_TCP4_CONFIG_DATA             Tcp4ConfigData;
> -
> -  if (Tcp4 == NULL) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  //
> -  // Format the child name into the string buffer as:
> -  // TCPv4 (SrcPort=59, DestPort=60, ActiveFlag=TRUE)
> -  //
> -  ZeroMem (&Tcp4ConfigData, sizeof (Tcp4ConfigData));
> -  Status = Tcp4->GetModeData (Tcp4, NULL, &Tcp4ConfigData, NULL, NULL,
> NULL);
> -  if (!EFI_ERROR (Status)) {
> -    UnicodeSPrint (HandleName, sizeof (HandleName),
> -      L"TCPv4 (SrcPort=%d, DestPort=%d, ActiveFlag=%s)",
> -      Tcp4ConfigData.AccessPoint.StationPort,
> -      Tcp4ConfigData.AccessPoint.RemotePort,
> -      (Tcp4ConfigData.AccessPoint.ActiveFlag ? L"TRUE" : L"FALSE")
> -      );
> -  } else if (Status == EFI_NOT_STARTED) {
> -    UnicodeSPrint (
> -      HandleName,
> -      sizeof (HandleName),
> -      L"TCPv4 (Not started)"
> -      );
> -  } else {
> -    return Status;
> -  }
> -
> -  if (gTcpControllerNameTable != NULL) {
> -    FreeUnicodeStringTable (gTcpControllerNameTable);
> -    gTcpControllerNameTable = NULL;
> -  }
> -
> -  Status = AddUnicodeString2 (
> -             "eng",
> -             gTcp4ComponentName.SupportedLanguages,
> -             &gTcpControllerNameTable,
> -             HandleName,
> -             TRUE
> -             );
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  return AddUnicodeString2 (
> -           "en",
> -           gTcp4ComponentName2.SupportedLanguages,
> -           &gTcpControllerNameTable,
> -           HandleName,
> -           FALSE
> -           );
> -}
> -
> -/**
> -  Retrieves a Unicode string that is the user readable name of the controller
> -  that is being managed by a driver.
> -
> -  This function retrieves the user readable name of the controller specified by
> -  ControllerHandle and ChildHandle in the form of a Unicode string. If the
> -  driver specified by This has a user readable name in the language specified by
> -  Language, then a pointer to the controller name is returned in ControllerName,
> -  and EFI_SUCCESS is returned.  If the driver specified by This is not currently
> -  managing the controller specified by ControllerHandle and ChildHandle,
> -  then EFI_UNSUPPORTED is returned.  If the driver specified by This does not
> -  support the language specified by Language, then EFI_UNSUPPORTED is
> returned.
> -
> -  @param[in]  This              A pointer to the
> EFI_COMPONENT_NAME2_PROTOCOL or
> -                                EFI_COMPONENT_NAME_PROTOCOL instance.
> -
> -  @param[in]  ControllerHandle  The handle of a controller that the driver
> -                                specified by This is managing.  This handle
> -                                specifies the controller whose name is to be
> -                                returned.
> -
> -  @param[in]  ChildHandle        The handle of the child controller to retrieve
> -                                the name of.  This is an optional parameter that
> -                                may be NULL.  It will be NULL for device
> -                                drivers.  It will also be NULL for a bus drivers
> -                                that wish to retrieve the name of the bus
> -                                controller.  It will not be NULL for a bus
> -                                driver that wishes to retrieve the name of a
> -                                child controller.
> -
> -  @param[in]  Language          A pointer to a Null-terminated ASCII string
> -                                array indicating the language.  This is the
> -                                language of the driver name that the caller is
> -                                requesting, and it must match one of the
> -                                languages specified in SupportedLanguages. The
> -                                number of languages supported by a driver is up
> -                                to the driver writer. Language is specified in
> -                                RFC 4646 or ISO 639-2 language code format.
> -
> -  @param[out]  ControllerName   A pointer to the Unicode string to return.
> -                                This Unicode string is the name of the
> -                                controller specified by ControllerHandle and
> -                                ChildHandle in the language specified by
> -                                Language from the point of view of the driver
> -                                specified by This.
> -
> -  @retval EFI_SUCCESS           The Unicode string for the user readable name in
> -                                the language specified by Language for the
> -                                driver specified by This was returned in
> -                                DriverName.
> -
> -  @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
> -
> -  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
> -                                EFI_HANDLE.
> -
> -  @retval EFI_INVALID_PARAMETER Language is NULL.
> -
> -  @retval EFI_INVALID_PARAMETER ControllerName is NULL.
> -
> -  @retval EFI_UNSUPPORTED       The driver specified by This is not currently
> -                                managing the controller specified by
> -                                ControllerHandle and ChildHandle.
> -
> -  @retval EFI_UNSUPPORTED       The driver specified by This does not support
> -                                the language specified by Language.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -TcpComponentNameGetControllerName (
> -  IN     EFI_COMPONENT_NAME_PROTOCOL  *This,
> -  IN     EFI_HANDLE                   ControllerHandle,
> -  IN     EFI_HANDLE                   ChildHandle        OPTIONAL,
> -  IN     CHAR8                        *Language,
> -     OUT CHAR16                       **ControllerName
> -  )
> -{
> -  EFI_STATUS                    Status;
> -  EFI_TCP4_PROTOCOL             *Tcp4;
> -
> -  //
> -  // Only provide names for child handles.
> -  //
> -  if (ChildHandle == NULL) {
> -    return EFI_UNSUPPORTED;
> -  }
> -
> -  //
> -  // Make sure this driver produced ChildHandle
> -  //
> -  Status = EfiTestChildHandle (
> -             ControllerHandle,
> -             ChildHandle,
> -             &gEfiIp4ProtocolGuid
> -             );
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  //
> -  // Retrieve an instance of a produced protocol from ChildHandle
> -  //
> -  Status = gBS->OpenProtocol (
> -                  ChildHandle,
> -                  &gEfiTcp4ProtocolGuid,
> -                  (VOID **)&Tcp4,
> -                  NULL,
> -                  NULL,
> -                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
> -                  );
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  //
> -  // Update the component name for this child handle.
> -  //
> -  Status = UpdateName (Tcp4);
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  return LookupUnicodeString2 (
> -           Language,
> -           This->SupportedLanguages,
> -           gTcpControllerNameTable,
> -           ControllerName,
> -           (BOOLEAN)(This == &gTcp4ComponentName)
> -           );
> -}
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.c
> deleted file mode 100644
> index adb5aa35cdf2..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.c
> +++ /dev/null
> @@ -1,1201 +0,0 @@
> -/** @file
> -  Implementation of the Socket.
> -
> -Copyright (c) 2005 - 2017, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#include "SockImpl.h"
> -
> -/**
> -  Get the length of the data that can be retrieved from the socket
> -  receive buffer.
> -
> -  @param  SockBuffer            Pointer to the socket receive buffer.
> -  @param  IsUrg                 Pointer to a BOOLEAN variable. If TRUE the data is
> -                                OOB.
> -  @param  BufLen                The maximum length of the data buffer to store the
> -                                received data in socket layer.
> -
> -  @return The length of the data can be retreived.
> -
> -**/
> -UINT32
> -SockTcpDataToRcv (
> -  IN     SOCK_BUFFER    *SockBuffer,
> -     OUT BOOLEAN        *IsUrg,
> -  IN     UINT32         BufLen
> -  );
> -
> -/**
> -  Process the send token.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockProcessSndToken (
> -  IN OUT SOCKET *Sock
> -  );
> -
> -/**
> -  Supporting function for both SockImpl and SockInterface.
> -
> -  @param Event             The Event this notify function registered to, ignored.
> -
> -**/
> -VOID
> -EFIAPI
> -SockFreeFoo (
> -  IN EFI_EVENT Event
> -  )
> -{
> -  return ;
> -}
> -
> -
> -/**
> -  Get the length of the data that can be retrieved from the socket
> -  receive buffer.
> -
> -  @param  SockBuffer            Pointer to the socket receive buffer.
> -  @param  IsUrg                 Pointer to a BOOLEAN variable. If TRUE the data is
> -                                OOB.
> -  @param  BufLen                The maximum length of the data buffer to store the
> -                                received data in socket layer.
> -
> -  @return The length of the data can be retreived.
> -
> -**/
> -UINT32
> -SockTcpDataToRcv (
> -  IN     SOCK_BUFFER    *SockBuffer,
> -     OUT BOOLEAN        *IsUrg,
> -  IN     UINT32         BufLen
> -  )
> -{
> -  NET_BUF       *RcvBufEntry;
> -  UINT32        DataLen;
> -  TCP_RSV_DATA  *TcpRsvData;
> -  BOOLEAN       Urg;
> -  ASSERT ((SockBuffer != NULL) && (IsUrg != NULL) && (BufLen > 0));
> -
> -  RcvBufEntry = SockBufFirst (SockBuffer);
> -  ASSERT (RcvBufEntry != NULL);
> -
> -  TcpRsvData  = (TCP_RSV_DATA *) RcvBufEntry->ProtoData;
> -
> -  *IsUrg      = (BOOLEAN) ((TcpRsvData->UrgLen > 0) ? TRUE : FALSE);
> -
> -  if (*IsUrg && TcpRsvData->UrgLen < RcvBufEntry->TotalSize) {
> -
> -    DataLen = MIN (TcpRsvData->UrgLen, BufLen);
> -
> -    if (DataLen < TcpRsvData->UrgLen) {
> -      TcpRsvData->UrgLen = TcpRsvData->UrgLen - DataLen;
> -    } else {
> -      TcpRsvData->UrgLen = 0;
> -    }
> -
> -    return DataLen;
> -
> -  }
> -
> -  DataLen     = RcvBufEntry->TotalSize;
> -
> -  RcvBufEntry = SockBufNext (SockBuffer, RcvBufEntry);
> -
> -  while ((BufLen > DataLen) && (RcvBufEntry != NULL)) {
> -
> -    TcpRsvData  = (TCP_RSV_DATA *) RcvBufEntry->ProtoData;
> -
> -    Urg         = (BOOLEAN) ((TcpRsvData->UrgLen > 0) ? TRUE : FALSE);
> -
> -    if (*IsUrg != Urg) {
> -      break;
> -    }
> -
> -    if (*IsUrg && TcpRsvData->UrgLen < RcvBufEntry->TotalSize) {
> -
> -      if (TcpRsvData->UrgLen + DataLen < BufLen) {
> -        TcpRsvData->UrgLen = 0;
> -      } else {
> -        TcpRsvData->UrgLen = TcpRsvData->UrgLen - (BufLen - DataLen);
> -      }
> -
> -      return MIN (TcpRsvData->UrgLen + DataLen, BufLen);
> -
> -    }
> -
> -    DataLen += RcvBufEntry->TotalSize;
> -
> -    RcvBufEntry = SockBufNext (SockBuffer, RcvBufEntry);
> -  }
> -
> -  DataLen = MIN (BufLen, DataLen);
> -  return DataLen;
> -}
> -
> -
> -/**
> -  Copy data from socket buffer to application provided receive buffer.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  TcpRxData             Pointer to the application provided receive buffer.
> -  @param  RcvdBytes             The maximum length of the data can be copied.
> -  @param  IsOOB                 If TRUE the data is OOB, FALSE the data is normal.
> -
> -**/
> -VOID
> -SockSetTcpRxData (
> -  IN SOCKET     *Sock,
> -  IN VOID       *TcpRxData,
> -  IN UINT32     RcvdBytes,
> -  IN BOOLEAN    IsOOB
> -  )
> -{
> -  UINT32                  Index;
> -  UINT32                  CopyBytes;
> -  UINT32                  OffSet;
> -  EFI_TCP4_RECEIVE_DATA   *RxData;
> -  EFI_TCP4_FRAGMENT_DATA  *Fragment;
> -
> -  RxData  = (EFI_TCP4_RECEIVE_DATA *) TcpRxData;
> -
> -  OffSet  = 0;
> -
> -  ASSERT (RxData->DataLength >= RcvdBytes);
> -
> -  RxData->DataLength  = RcvdBytes;
> -  RxData->UrgentFlag  = IsOOB;
> -
> -  for (Index = 0; (Index < RxData->FragmentCount) && (RcvdBytes > 0); Index++)
> {
> -
> -    Fragment  = &RxData->FragmentTable[Index];
> -    CopyBytes = MIN ((UINT32) (Fragment->FragmentLength), RcvdBytes);
> -
> -    NetbufQueCopy (
> -      Sock->RcvBuffer.DataQueue,
> -      OffSet,
> -      CopyBytes,
> -      Fragment->FragmentBuffer
> -      );
> -
> -    Fragment->FragmentLength = CopyBytes;
> -    RcvdBytes -= CopyBytes;
> -    OffSet += CopyBytes;
> -  }
> -}
> -
> -
> -/**
> -  Get received data from the socket layer to the receive token.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  RcvToken              Pointer to the application provided receive token.
> -
> -  @return The length of data received in this token.
> -
> -**/
> -UINT32
> -SockProcessRcvToken (
> -  IN     SOCKET        *Sock,
> -  IN OUT SOCK_IO_TOKEN *RcvToken
> -  )
> -{
> -  UINT32                 TokenRcvdBytes;
> -  EFI_TCP4_RECEIVE_DATA  *RxData;
> -  BOOLEAN                IsUrg;
> -
> -  ASSERT (Sock != NULL);
> -
> -  ASSERT (SockStream == Sock->Type);
> -
> -  RxData = RcvToken->Packet.RxData;
> -
> -  TokenRcvdBytes = SockTcpDataToRcv (
> -                      &Sock->RcvBuffer,
> -                      &IsUrg,
> -                      (UINT32) RxData->DataLength
> -                      );
> -
> -  //
> -  // Copy data from RcvBuffer of socket to user
> -  // provided RxData and set the fields in TCP RxData
> -  //
> -  SockSetTcpRxData (Sock, RxData, TokenRcvdBytes, IsUrg);
> -
> -  NetbufQueTrim (Sock->RcvBuffer.DataQueue, TokenRcvdBytes);
> -  SIGNAL_TOKEN (&(RcvToken->Token), EFI_SUCCESS);
> -
> -  return TokenRcvdBytes;
> -}
> -
> -
> -/**
> -  Process the TCP send data, buffer the tcp txdata and append
> -  the buffer to socket send buffer,then try to send it.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  TcpTxData             Pointer to the application provided send buffer.
> -
> -  @retval EFI_SUCCESS           The operation is completed successfully.
> -  @retval EFI_OUT_OF_RESOURCES  Failed due to resource limit.
> -
> -**/
> -EFI_STATUS
> -SockProcessTcpSndData (
> -  IN SOCKET   *Sock,
> -  IN VOID     *TcpTxData
> -  )
> -{
> -  NET_BUF                 *SndData;
> -  EFI_STATUS              Status;
> -  EFI_TCP4_TRANSMIT_DATA  *TxData;
> -
> -  TxData = (EFI_TCP4_TRANSMIT_DATA *) TcpTxData;
> -
> -  //
> -  // transform this TxData into a NET_BUFFER
> -  // and insert it into Sock->SndBuffer
> -  //
> -  SndData = NetbufFromExt (
> -              (NET_FRAGMENT *) TxData->FragmentTable,
> -              (UINT32) TxData->FragmentCount,
> -              0,
> -              0,
> -              SockFreeFoo,
> -              NULL
> -              );
> -
> -  if (NULL == SndData) {
> -    DEBUG ((EFI_D_ERROR, "SockKProcessSndData: Failed to"
> -      " call NetBufferFromExt\n"));
> -
> -    return EFI_OUT_OF_RESOURCES;
> -  }
> -
> -  NetbufQueAppend (Sock->SndBuffer.DataQueue, SndData);
> -
> -  //
> -  // notify the low layer protocol to handle this send token
> -  //
> -  if (TxData->Urgent) {
> -    Status = Sock->ProtoHandler (Sock, SOCK_SNDURG, NULL);
> -
> -    if (EFI_ERROR (Status)) {
> -      return Status;
> -    }
> -  }
> -
> -  if (TxData->Push) {
> -    Status = Sock->ProtoHandler (Sock, SOCK_SNDPUSH, NULL);
> -
> -    if (EFI_ERROR (Status)) {
> -      return Status;
> -    }
> -  }
> -
> -  //
> -  // low layer protocol should really handle the sending
> -  // process when catching SOCK_SND request
> -  //
> -  Status = Sock->ProtoHandler (Sock, SOCK_SND, NULL);
> -
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  return EFI_SUCCESS;
> -}
> -
> -
> -/**
> -  Flush the tokens in the specific token list.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  PendingTokenList      Pointer to the token list to be flushed.
> -
> -**/
> -VOID
> -SockFlushPendingToken (
> -  IN SOCKET         *Sock,
> -  IN LIST_ENTRY     *PendingTokenList
> -  )
> -{
> -  SOCK_TOKEN            *SockToken;
> -  SOCK_COMPLETION_TOKEN *Token;
> -
> -  ASSERT ((Sock != NULL) && (PendingTokenList != NULL));
> -
> -  while (!IsListEmpty (PendingTokenList)) {
> -    SockToken = NET_LIST_HEAD (
> -                  PendingTokenList,
> -                  SOCK_TOKEN,
> -                  TokenList
> -                  );
> -
> -    Token = SockToken->Token;
> -    SIGNAL_TOKEN (Token, Sock->SockError);
> -
> -    RemoveEntryList (&(SockToken->TokenList));
> -    FreePool (SockToken);
> -  }
> -}
> -
> -
> -/**
> -  Wake up the connection token while the connection is successfully established,
> -  then try to process any pending send token.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockWakeConnToken (
> -  IN OUT SOCKET *Sock
> -  )
> -{
> -  ASSERT (Sock->ConnectionToken != NULL);
> -
> -  SIGNAL_TOKEN (Sock->ConnectionToken, EFI_SUCCESS);
> -  Sock->ConnectionToken = NULL;
> -
> -  //
> -  // check to see if some pending send token existed?
> -  //
> -  SockProcessSndToken (Sock);
> -  return ;
> -}
> -
> -
> -/**
> -  Wake up the listen token while the connection is established successfully.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockWakeListenToken (
> -  IN OUT SOCKET *Sock
> -  )
> -{
> -  SOCKET                *Parent;
> -  SOCK_TOKEN            *SockToken;
> -  EFI_TCP4_LISTEN_TOKEN *ListenToken;
> -
> -  Parent = Sock->Parent;
> -
> -  ASSERT ((Parent != NULL) && SOCK_IS_LISTENING (Parent) &&
> SOCK_IS_CONNECTED (Sock));
> -
> -  if (!IsListEmpty (&Parent->ListenTokenList)) {
> -    SockToken = NET_LIST_HEAD (
> -                  &Parent->ListenTokenList,
> -                  SOCK_TOKEN,
> -                  TokenList
> -                  );
> -
> -    ListenToken = (EFI_TCP4_LISTEN_TOKEN *) SockToken->Token;
> -    ListenToken->NewChildHandle = Sock->SockHandle;
> -
> -    SIGNAL_TOKEN (&(ListenToken->CompletionToken), EFI_SUCCESS);
> -
> -    RemoveEntryList (&SockToken->TokenList);
> -    FreePool (SockToken);
> -
> -    RemoveEntryList (&Sock->ConnectionList);
> -
> -    Parent->ConnCnt--;
> -    DEBUG ((EFI_D_NET, "SockWakeListenToken: accept a socket, now conncnt
> is %d", Parent->ConnCnt));
> -
> -    Sock->Parent = NULL;
> -  }
> -}
> -
> -
> -/**
> -  Wake up the receive token while some data is received.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockWakeRcvToken (
> -  IN SOCKET *Sock
> -  )
> -{
> -  UINT32        RcvdBytes;
> -  UINT32        TokenRcvdBytes;
> -  SOCK_TOKEN    *SockToken;
> -  SOCK_IO_TOKEN *RcvToken;
> -
> -  ASSERT (Sock->RcvBuffer.DataQueue != NULL);
> -
> -  RcvdBytes = (Sock->RcvBuffer.DataQueue)->BufSize;
> -
> -  ASSERT (RcvdBytes > 0);
> -
> -  while (RcvdBytes > 0 && !IsListEmpty (&Sock->RcvTokenList)) {
> -
> -    SockToken = NET_LIST_HEAD (
> -                  &Sock->RcvTokenList,
> -                  SOCK_TOKEN,
> -                  TokenList
> -                  );
> -
> -    RcvToken        = (SOCK_IO_TOKEN *) SockToken->Token;
> -    TokenRcvdBytes  = SockProcessRcvToken (Sock, RcvToken);
> -
> -    if (0 == TokenRcvdBytes) {
> -      return ;
> -    }
> -
> -    RemoveEntryList (&(SockToken->TokenList));
> -    FreePool (SockToken);
> -    RcvdBytes -= TokenRcvdBytes;
> -  }
> -}
> -
> -
> -/**
> -  Process the send token.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockProcessSndToken (
> -  IN OUT SOCKET *Sock
> -  )
> -{
> -  UINT32                  FreeSpace;
> -  SOCK_TOKEN              *SockToken;
> -  UINT32                  DataLen;
> -  SOCK_IO_TOKEN           *SndToken;
> -  EFI_TCP4_TRANSMIT_DATA  *TxData;
> -  EFI_STATUS              Status;
> -
> -  ASSERT ((Sock != NULL) && (SockStream == Sock->Type));
> -
> -  FreeSpace = SockGetFreeSpace (Sock, SOCK_SND_BUF);
> -
> -  //
> -  // to determine if process a send token using
> -  // socket layer flow control policy
> -  //
> -  while ((FreeSpace >= Sock->SndBuffer.LowWater) &&
> -         !IsListEmpty (&Sock->SndTokenList)) {
> -
> -    SockToken = NET_LIST_HEAD (
> -                  &(Sock->SndTokenList),
> -                  SOCK_TOKEN,
> -                  TokenList
> -                  );
> -
> -    //
> -    // process this token
> -    //
> -    RemoveEntryList (&(SockToken->TokenList));
> -    InsertTailList (
> -      &(Sock->ProcessingSndTokenList),
> -      &(SockToken->TokenList)
> -      );
> -
> -    //
> -    // Proceess it in the light of  SockType
> -    //
> -    SndToken  = (SOCK_IO_TOKEN *) SockToken->Token;
> -    TxData    = SndToken->Packet.TxData;
> -
> -    DataLen = (UINT32) TxData->DataLength;
> -    Status  = SockProcessTcpSndData (Sock, TxData);
> -
> -    if (EFI_ERROR (Status)) {
> -      goto OnError;
> -    }
> -
> -    if (DataLen >= FreeSpace) {
> -      FreeSpace = 0;
> -
> -    } else {
> -      FreeSpace -= DataLen;
> -
> -    }
> -  }
> -
> -  return ;
> -
> -OnError:
> -
> -  RemoveEntryList (&SockToken->TokenList);
> -  SIGNAL_TOKEN (SockToken->Token, Status);
> -  FreePool (SockToken);
> -}
> -
> -
> -/**
> -  Create a socket with initial data SockInitData.
> -
> -  @param  SockInitData          Pointer to the initial data of the socket.
> -
> -  @return Pointer to the newly created socket, return NULL when exception
> occured.
> -
> -**/
> -SOCKET *
> -SockCreate (
> -  IN SOCK_INIT_DATA *SockInitData
> -  )
> -{
> -  SOCKET      *Sock;
> -  SOCKET      *Parent;
> -  EFI_STATUS  Status;
> -
> -  ASSERT ((SockInitData != NULL) && (SockInitData->ProtoHandler != NULL));
> -  ASSERT (SockInitData->Type == SockStream);
> -  ASSERT ((SockInitData->ProtoData != NULL) && (SockInitData->DataSize <=
> PROTO_RESERVED_LEN));
> -
> -  Parent = SockInitData->Parent;
> -
> -  if ((Parent != NULL) && (Parent->ConnCnt == Parent->BackLog)) {
> -    DEBUG (
> -      (EFI_D_ERROR,
> -      "SockCreate: Socket parent has "
> -      "reached its connection limit with %d ConnCnt and %d BackLog\n",
> -      Parent->ConnCnt,
> -      Parent->BackLog)
> -      );
> -
> -    return NULL;
> -  }
> -
> -  Sock = AllocateZeroPool (sizeof (SOCKET));
> -  if (NULL == Sock) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockCreate: No resource to create a new
> socket\n"));
> -    return NULL;
> -  }
> -
> -  InitializeListHead (&Sock->Link);
> -  InitializeListHead (&Sock->ConnectionList);
> -  InitializeListHead (&Sock->ListenTokenList);
> -  InitializeListHead (&Sock->RcvTokenList);
> -  InitializeListHead (&Sock->SndTokenList);
> -  InitializeListHead (&Sock->ProcessingSndTokenList);
> -
> -  EfiInitializeLock (&(Sock->Lock), TPL_CALLBACK);
> -
> -  Sock->SndBuffer.DataQueue = NetbufQueAlloc ();
> -  if (NULL == Sock->SndBuffer.DataQueue) {
> -    DEBUG ((EFI_D_ERROR, "SockCreate: No resource to allocate"
> -      " SndBuffer for new socket\n"));
> -
> -    goto OnError;
> -  }
> -
> -  Sock->RcvBuffer.DataQueue = NetbufQueAlloc ();
> -  if (NULL == Sock->RcvBuffer.DataQueue) {
> -    DEBUG ((EFI_D_ERROR, "SockCreate: No resource to allocate "
> -      "RcvBuffer for new socket\n"));
> -
> -    goto OnError;
> -  }
> -
> -  Sock->Signature           = SOCK_SIGNATURE;
> -
> -  Sock->Parent              = Parent;
> -  Sock->BackLog             = SockInitData->BackLog;
> -  Sock->ProtoHandler        = SockInitData->ProtoHandler;
> -  Sock->SndBuffer.HighWater = SockInitData->SndBufferSize;
> -  Sock->RcvBuffer.HighWater = SockInitData->RcvBufferSize;
> -  Sock->Type                = SockInitData->Type;
> -  Sock->DriverBinding       = SockInitData->DriverBinding;
> -  Sock->State               = SockInitData->State;
> -  Sock->CreateCallback      = SockInitData->CreateCallback;
> -  Sock->DestroyCallback     = SockInitData->DestroyCallback;
> -  Sock->Context             = SockInitData->Context;
> -
> -  Sock->SockError           = EFI_ABORTED;
> -  Sock->SndBuffer.LowWater  = SOCK_BUFF_LOW_WATER;
> -  Sock->RcvBuffer.LowWater  = SOCK_BUFF_LOW_WATER;
> -
> -  //
> -  // Install protocol on Sock->SockHandle
> -  //
> -  CopyMem (
> -    &(Sock->NetProtocol.TcpProtocol),
> -    SockInitData->Protocol,
> -    sizeof (EFI_TCP4_PROTOCOL)
> -    );
> -
> -  //
> -  // copy the protodata into socket
> -  //
> -  CopyMem (Sock->ProtoReserved, SockInitData->ProtoData, SockInitData-
> >DataSize);
> -
> -  Status = gBS->InstallMultipleProtocolInterfaces (
> -                  &Sock->SockHandle,
> -                  &gEfiTcp4ProtocolGuid,
> -                  &(Sock->NetProtocol.TcpProtocol),
> -                  NULL
> -                  );
> -
> -  if (EFI_ERROR (Status)) {
> -    DEBUG ((EFI_D_ERROR, "SockCreate: Install TCP protocol in "
> -      "socket failed with %r\n", Status));
> -
> -    goto OnError;
> -  }
> -
> -  if (Parent != NULL) {
> -    ASSERT (Parent->BackLog > 0);
> -    ASSERT (SOCK_IS_LISTENING (Parent));
> -
> -    //
> -    // need to add it into Parent->ConnectionList
> -    // if the Parent->ConnCnt < Parent->BackLog
> -    //
> -    Parent->ConnCnt++;
> -
> -    DEBUG (
> -      (EFI_D_NET,
> -      "SockCreate: Create a new socket and add to parent, now conncnt is %d\n",
> -      Parent->ConnCnt)
> -      );
> -
> -    InsertTailList (&Parent->ConnectionList, &Sock->ConnectionList);
> -  }
> -
> -  if (Sock->CreateCallback != NULL) {
> -    Status = Sock->CreateCallback (Sock, Sock->Context);
> -    if (EFI_ERROR (Status)) {
> -      goto OnError;
> -    }
> -  }
> -
> -  return Sock;
> -
> -OnError:
> -
> -  if (Sock->SockHandle != NULL) {
> -    gBS->UninstallMultipleProtocolInterfaces (
> -           Sock->SockHandle,
> -           &gEfiTcp4ProtocolGuid,
> -           &(Sock->NetProtocol.TcpProtocol),
> -           NULL
> -           );
> -  }
> -
> -  if (NULL != Sock->SndBuffer.DataQueue) {
> -    NetbufQueFree (Sock->SndBuffer.DataQueue);
> -  }
> -
> -  if (NULL != Sock->RcvBuffer.DataQueue) {
> -    NetbufQueFree (Sock->RcvBuffer.DataQueue);
> -  }
> -
> -  FreePool (Sock);
> -
> -  return NULL;
> -}
> -
> -
> -/**
> -  Destroy a socket.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockDestroy (
> -  IN OUT SOCKET *Sock
> -  )
> -{
> -  ASSERT (SockStream == Sock->Type);
> -
> -  //
> -  // Flush the completion token buffered
> -  // by sock and rcv, snd buffer
> -  //
> -  if (!SOCK_IS_UNCONFIGURED (Sock)) {
> -
> -    SockConnFlush (Sock);
> -    SockSetState (Sock, SO_CLOSED);
> -    Sock->ConfigureState = SO_UNCONFIGURED;
> -
> -  }
> -  //
> -  // Destroy the RcvBuffer Queue and SendBuffer Queue
> -  //
> -  NetbufQueFree (Sock->RcvBuffer.DataQueue);
> -  NetbufQueFree (Sock->SndBuffer.DataQueue);
> -
> -  //
> -  // Remove it from parent connection list if needed
> -  //
> -  if (Sock->Parent != NULL) {
> -
> -    RemoveEntryList (&(Sock->ConnectionList));
> -    (Sock->Parent->ConnCnt)--;
> -
> -    DEBUG (
> -      (EFI_D_NET,
> -      "SockDestroy: Delete a unaccepted socket from parent"
> -      "now conncnt is %d\n",
> -      Sock->Parent->ConnCnt)
> -      );
> -
> -    Sock->Parent = NULL;
> -  }
> -
> -  FreePool (Sock);
> -  return ;
> -}
> -
> -
> -/**
> -  Flush the sndBuffer and rcvBuffer of socket.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockConnFlush (
> -  IN OUT SOCKET *Sock
> -  )
> -{
> -  SOCKET  *Child;
> -
> -  ASSERT (Sock != NULL);
> -
> -  //
> -  // Clear the flag in this socket
> -  //
> -  Sock->Flag = 0;
> -
> -  //
> -  // Flush the SndBuffer and RcvBuffer of Sock
> -  //
> -  NetbufQueFlush (Sock->SndBuffer.DataQueue);
> -  NetbufQueFlush (Sock->RcvBuffer.DataQueue);
> -
> -  //
> -  // Signal the pending token
> -  //
> -  if (Sock->ConnectionToken != NULL) {
> -    SIGNAL_TOKEN (Sock->ConnectionToken, Sock->SockError);
> -    Sock->ConnectionToken = NULL;
> -  }
> -
> -  if (Sock->CloseToken != NULL) {
> -    SIGNAL_TOKEN (Sock->CloseToken, Sock->SockError);
> -    Sock->CloseToken = NULL;
> -  }
> -
> -  SockFlushPendingToken (Sock, &(Sock->ListenTokenList));
> -  SockFlushPendingToken (Sock, &(Sock->RcvTokenList));
> -  SockFlushPendingToken (Sock, &(Sock->SndTokenList));
> -  SockFlushPendingToken (Sock, &(Sock->ProcessingSndTokenList));
> -
> -  //
> -  // Destroy the pending connection, if it is a listening socket
> -  //
> -  if (SOCK_IS_LISTENING (Sock)) {
> -    while (!IsListEmpty (&Sock->ConnectionList)) {
> -      Child = NET_LIST_HEAD (
> -                &Sock->ConnectionList,
> -                SOCKET,
> -                ConnectionList
> -                );
> -
> -      SockDestroyChild (Child);
> -    }
> -
> -    Sock->ConnCnt = 0;
> -  }
> -
> -  return ;
> -}
> -
> -
> -/**
> -  Set the state of the socket.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  State                 The new socket state to be set.
> -
> -**/
> -VOID
> -SockSetState (
> -  IN OUT SOCKET     *Sock,
> -  IN     UINT8      State
> -  )
> -{
> -  Sock->State = State;
> -}
> -
> -
> -/**
> -  Clone a new socket including its associated protocol control block.
> -
> -  @param  Sock                  Pointer to the socket to be cloned.
> -
> -  @return Pointer to the newly cloned socket. If NULL, error condition occurred.
> -
> -**/
> -SOCKET *
> -SockClone (
> -  IN SOCKET *Sock
> -  )
> -{
> -  SOCKET          *ClonedSock;
> -  SOCK_INIT_DATA  InitData;
> -
> -  InitData.BackLog         = Sock->BackLog;
> -  InitData.Parent          = Sock;
> -  InitData.State           = Sock->State;
> -  InitData.ProtoHandler    = Sock->ProtoHandler;
> -  InitData.Type            = Sock->Type;
> -  InitData.RcvBufferSize   = Sock->RcvBuffer.HighWater;
> -  InitData.SndBufferSize   = Sock->SndBuffer.HighWater;
> -  InitData.DriverBinding   = Sock->DriverBinding;
> -  InitData.Protocol        = &(Sock->NetProtocol);
> -  InitData.CreateCallback  = Sock->CreateCallback;
> -  InitData.DestroyCallback = Sock->DestroyCallback;
> -  InitData.Context         = Sock->Context;
> -  InitData.ProtoData       = Sock->ProtoReserved;
> -  InitData.DataSize        = sizeof (Sock->ProtoReserved);
> -
> -  ClonedSock               = SockCreate (&InitData);
> -
> -  if (NULL == ClonedSock) {
> -    DEBUG ((EFI_D_ERROR, "SockClone: no resource to create a cloned sock\n"));
> -    return NULL;
> -  }
> -
> -  SockSetState (ClonedSock, SO_CONNECTING);
> -  ClonedSock->ConfigureState = Sock->ConfigureState;
> -
> -  return ClonedSock;
> -}
> -
> -
> -/**
> -  Called by the low layer protocol to indicate the socket a connection is
> -  established.
> -
> -  This function just changes the socket's state to SO_CONNECTED
> -  and signals the token used for connection establishment.
> -
> -  @param  Sock                  Pointer to the socket associated with the
> -                                established connection.
> -**/
> -VOID
> -SockConnEstablished (
> -  IN SOCKET *Sock
> -  )
> -{
> -
> -  ASSERT (SO_CONNECTING == Sock->State);
> -
> -  SockSetState (Sock, SO_CONNECTED);
> -
> -  if (NULL == Sock->Parent) {
> -    SockWakeConnToken (Sock);
> -  } else {
> -    SockWakeListenToken (Sock);
> -  }
> -
> -  return ;
> -}
> -
> -
> -/**
> -  Called by the low layer protocol to indicate the connection is closed.
> -
> -  This function flushes the socket, sets the state to SO_CLOSED and signals
> -  the close token.
> -
> -  @param  Sock                  Pointer to the socket associated with the closed
> -                                connection.
> -
> -**/
> -VOID
> -SockConnClosed (
> -  IN OUT SOCKET *Sock
> -  )
> -{
> -  if (Sock->CloseToken != NULL) {
> -    SIGNAL_TOKEN (Sock->CloseToken, EFI_SUCCESS);
> -    Sock->CloseToken = NULL;
> -  }
> -
> -  SockConnFlush (Sock);
> -  SockSetState (Sock, SO_CLOSED);
> -
> -  if (Sock->Parent != NULL) {
> -    SockDestroyChild (Sock);
> -  }
> -
> -}
> -
> -
> -/**
> -  Called by low layer protocol to indicate that some data is sent or processed.
> -
> -  This function trims the sent data in the socket send buffer, signals the data
> -  token if proper.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  Count                 The length of the data processed or sent, in bytes.
> -
> -**/
> -VOID
> -SockDataSent (
> -  IN SOCKET     *Sock,
> -  IN UINT32     Count
> -  )
> -{
> -  SOCK_TOKEN            *SockToken;
> -  SOCK_COMPLETION_TOKEN *SndToken;
> -
> -  ASSERT (!IsListEmpty (&Sock->ProcessingSndTokenList));
> -  ASSERT (Count <= (Sock->SndBuffer.DataQueue)->BufSize);
> -
> -  NetbufQueTrim (Sock->SndBuffer.DataQueue, Count);
> -
> -  //
> -  // To check if we can signal some snd token in this socket
> -  //
> -  while (Count > 0) {
> -    SockToken = NET_LIST_HEAD (
> -                  &(Sock->ProcessingSndTokenList),
> -                  SOCK_TOKEN,
> -                  TokenList
> -                  );
> -
> -    SndToken = SockToken->Token;
> -
> -    if (SockToken->RemainDataLen <= Count) {
> -
> -      RemoveEntryList (&(SockToken->TokenList));
> -      SIGNAL_TOKEN (SndToken, EFI_SUCCESS);
> -      Count -= SockToken->RemainDataLen;
> -      FreePool (SockToken);
> -    } else {
> -
> -      SockToken->RemainDataLen -= Count;
> -      Count = 0;
> -    }
> -  }
> -
> -  //
> -  // to judge if we can process some send token in
> -  // Sock->SndTokenList, if so process those send token
> -  //
> -  SockProcessSndToken (Sock);
> -  return ;
> -}
> -
> -
> -/**
> -  Called by the low layer protocol to copy some data in socket send
> -  buffer starting from the specific offset to a buffer provided by
> -  the caller.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  Offset                The start point of the data to be copied.
> -  @param  Len                   The length of the data to be copied.
> -  @param  Dest                  Pointer to the destination to copy the data.
> -
> -  @return The data size copied.
> -
> -**/
> -UINT32
> -SockGetDataToSend (
> -  IN SOCKET      *Sock,
> -  IN UINT32      Offset,
> -  IN UINT32      Len,
> -  IN UINT8       *Dest
> -  )
> -{
> -  ASSERT ((Sock != NULL) && SockStream == Sock->Type);
> -
> -  return NetbufQueCopy (
> -          Sock->SndBuffer.DataQueue,
> -          Offset,
> -          Len,
> -          Dest
> -          );
> -}
> -
> -
> -/**
> -  Called by the low layer protocol to deliver received data to socket layer.
> -
> -  This function will append the data to the socket receive buffer, set ther
> -  urgent data length and then check if any receive token can be signaled.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  NetBuffer             Pointer to the buffer that contains the received
> -                                data.
> -  @param  UrgLen                The length of the urgent data in the received data.
> -
> -**/
> -VOID
> -SockDataRcvd (
> -  IN     SOCKET    *Sock,
> -  IN OUT NET_BUF   *NetBuffer,
> -  IN     UINT32    UrgLen
> -  )
> -{
> -  ASSERT ((Sock != NULL) && (Sock->RcvBuffer.DataQueue != NULL) &&
> -    UrgLen <= NetBuffer->TotalSize);
> -
> -  NET_GET_REF (NetBuffer);
> -
> -  ((TCP_RSV_DATA *) (NetBuffer->ProtoData))->UrgLen = UrgLen;
> -
> -  NetbufQueAppend (Sock->RcvBuffer.DataQueue, NetBuffer);
> -
> -  SockWakeRcvToken (Sock);
> -  return ;
> -}
> -
> -
> -/**
> -  Get the length of the free space of the specific socket buffer.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  Which                 Flag to indicate which socket buffer to check,
> -                                either send buffer or receive buffer.
> -
> -  @return The length of the free space, in bytes.
> -
> -**/
> -UINT32
> -SockGetFreeSpace (
> -  IN SOCKET  *Sock,
> -  IN UINT32  Which
> -  )
> -{
> -  UINT32      BufferCC;
> -  SOCK_BUFFER *SockBuffer;
> -
> -  ASSERT ((Sock != NULL) && ((SOCK_SND_BUF == Which) || (SOCK_RCV_BUF
> == Which)));
> -
> -  if (SOCK_SND_BUF == Which) {
> -    SockBuffer = &(Sock->SndBuffer);
> -  } else {
> -    SockBuffer = &(Sock->RcvBuffer);
> -  }
> -
> -  BufferCC = (SockBuffer->DataQueue)->BufSize;
> -
> -  if (BufferCC >= SockBuffer->HighWater) {
> -
> -    return 0;
> -  }
> -
> -  return SockBuffer->HighWater - BufferCC;
> -}
> -
> -
> -
> -/**
> -  Called by the low layer protocol to indicate that there will be no more data
> -  from the communication peer.
> -
> -  This function set the socket's state to SO_NO_MORE_DATA and signal all
> queued
> -  IO tokens with the error status EFI_CONNECTION_FIN.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockNoMoreData (
> -  IN OUT SOCKET *Sock
> -  )
> -{
> -  EFI_STATUS  Err;
> -
> -  SOCK_NO_MORE_DATA (Sock);
> -
> -  if (!IsListEmpty (&Sock->RcvTokenList)) {
> -
> -    ASSERT (0 == GET_RCV_DATASIZE (Sock));
> -
> -    Err = Sock->SockError;
> -
> -    SOCK_ERROR (Sock, EFI_CONNECTION_FIN);
> -
> -    SockFlushPendingToken (Sock, &Sock->RcvTokenList);
> -
> -    SOCK_ERROR (Sock, Err);
> -
> -  }
> -
> -}
> -
> -
> -/**
> -  Get the first buffer block in the specific socket buffer.
> -
> -  @param  Sockbuf               Pointer to the socket buffer.
> -
> -  @return Pointer to the first buffer in the queue. NULL if the queue is empty.
> -
> -**/
> -NET_BUF *
> -SockBufFirst (
> -  IN SOCK_BUFFER *Sockbuf
> -  )
> -{
> -  LIST_ENTRY      *NetbufList;
> -
> -  NetbufList = &(Sockbuf->DataQueue->BufList);
> -
> -  if (IsListEmpty (NetbufList)) {
> -    return NULL;
> -  }
> -
> -  return NET_LIST_HEAD (NetbufList, NET_BUF, List);
> -}
> -
> -
> -/**
> -  Get the next buffer block in the specific socket buffer.
> -
> -  @param  Sockbuf               Pointer to the socket buffer.
> -  @param  SockEntry             Pointer to the buffer block prior to the required
> -                                one.
> -
> -  @return Pointer to the buffer block next to SockEntry. NULL if SockEntry is
> -          the tail or head entry.
> -
> -**/
> -NET_BUF *
> -SockBufNext (
> -  IN SOCK_BUFFER *Sockbuf,
> -  IN NET_BUF     *SockEntry
> -  )
> -{
> -  LIST_ENTRY      *NetbufList;
> -
> -  NetbufList = &(Sockbuf->DataQueue->BufList);
> -
> -  if ((SockEntry->List.ForwardLink == NetbufList) ||
> -      (SockEntry->List.BackLink == &SockEntry->List) ||
> -      (SockEntry->List.ForwardLink == &SockEntry->List)) {
> -
> -    return NULL;
> -  }
> -
> -  return NET_LIST_USER_STRUCT (SockEntry->List.ForwardLink, NET_BUF, List);
> -}
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/SockInterface.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/SockInterface.c
> deleted file mode 100644
> index cd20b8bcb2dd..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/SockInterface.c
> +++ /dev/null
> @@ -1,990 +0,0 @@
> -/** @file
> -  Interface function of the Socket.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -
> -#include "SockImpl.h"
> -
> -
> -/**
> -  Check whether the Event is in the List.
> -
> -  @param  List                 Pointer to the token list to be searched.
> -  @param  Event                The event to be checked.
> -
> -  @retval  TRUE                The specific Event exists in the List.
> -  @retval  FALSE               The specific Event is not in the List.
> -
> -**/
> -BOOLEAN
> -SockTokenExistedInList (
> -  IN LIST_ENTRY     *List,
> -  IN EFI_EVENT      Event
> -  )
> -{
> -  LIST_ENTRY      *ListEntry;
> -  SOCK_TOKEN      *SockToken;
> -
> -  NET_LIST_FOR_EACH (ListEntry, List) {
> -    SockToken = NET_LIST_USER_STRUCT (
> -                  ListEntry,
> -                  SOCK_TOKEN,
> -                  TokenList
> -                  );
> -
> -    if (Event == SockToken->Token->Event) {
> -      return TRUE;
> -    }
> -  }
> -
> -  return FALSE;
> -}
> -
> -
> -/**
> -  Call SockTokenExistedInList() to check whether the Event is
> -  in the related socket's lists.
> -
> -  @param  Sock                 Pointer to the instance's socket.
> -  @param  Event                The event to be checked.
> -
> -  @retval  TRUE                The Event exists in related socket's lists.
> -  @retval  FALSE               The Event is not in related socket's lists.
> -
> -**/
> -BOOLEAN
> -SockTokenExisted (
> -  IN SOCKET    *Sock,
> -  IN EFI_EVENT Event
> -  )
> -{
> -
> -  if (SockTokenExistedInList (&Sock->SndTokenList, Event) ||
> -      SockTokenExistedInList (&Sock->ProcessingSndTokenList, Event) ||
> -      SockTokenExistedInList (&Sock->RcvTokenList, Event) ||
> -      SockTokenExistedInList (&Sock->ListenTokenList, Event)) {
> -
> -    return TRUE;
> -  }
> -
> -  if ((Sock->ConnectionToken != NULL) &&
> -      (Sock->ConnectionToken->Event == Event)) {
> -
> -    return TRUE;
> -  }
> -
> -  if ((Sock->CloseToken != NULL) && (Sock->CloseToken->Event == Event)) {
> -    return TRUE;
> -  }
> -
> -  return FALSE;
> -}
> -
> -
> -/**
> -  Buffer a token into the specific list of socket Sock.
> -
> -  @param  Sock                 Pointer to the instance's socket.
> -  @param  List                 Pointer to the list to store the token.
> -  @param  Token                Pointer to the token to be buffered.
> -  @param  DataLen              The data length of the buffer contained in Token.
> -
> -  @return Pointer to the token that wraps Token. If NULL, error condition
> occurred.
> -
> -**/
> -SOCK_TOKEN *
> -SockBufferToken (
> -  IN SOCKET         *Sock,
> -  IN LIST_ENTRY     *List,
> -  IN VOID           *Token,
> -  IN UINT32         DataLen
> -  )
> -{
> -  SOCK_TOKEN  *SockToken;
> -
> -  SockToken = AllocatePool (sizeof (SOCK_TOKEN));
> -  if (NULL == SockToken) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockBufferIOToken: No Memory "
> -      "to allocate SockToken\n"));
> -
> -    return NULL;
> -  }
> -
> -  SockToken->Sock           = Sock;
> -  SockToken->Token          = (SOCK_COMPLETION_TOKEN *) Token;
> -  SockToken->RemainDataLen  = DataLen;
> -  InsertTailList (List, &SockToken->TokenList);
> -
> -  return SockToken;
> -}
> -
> -
> -/**
> -  Destroy the socket Sock and its associated protocol control block.
> -
> -  @param  Sock                 The socket to be destroyed.
> -
> -  @retval EFI_SUCCESS          The socket Sock is destroyed successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket.
> -
> -**/
> -EFI_STATUS
> -SockDestroyChild (
> -  IN SOCKET *Sock
> -  )
> -{
> -  EFI_STATUS       Status;
> -  TCP4_PROTO_DATA  *ProtoData;
> -  TCP_CB           *Tcb;
> -  VOID             *SockProtocol;
> -
> -  ASSERT ((Sock != NULL) && (Sock->ProtoHandler != NULL));
> -
> -  if (Sock->InDestroy) {
> -    return EFI_SUCCESS;
> -  }
> -
> -  Sock->InDestroy = TRUE;
> -
> -  ProtoData = (TCP4_PROTO_DATA *) Sock->ProtoReserved;
> -  Tcb       = ProtoData->TcpPcb;
> -
> -  ASSERT (Tcb != NULL);
> -
> -  //
> -  // Close the IP protocol.
> -  //
> -  gBS->CloseProtocol (
> -         Tcb->IpInfo->ChildHandle,
> -         &gEfiIp4ProtocolGuid,
> -         ProtoData->TcpService->IpIo->Image,
> -         Sock->SockHandle
> -         );
> -
> -  if (Sock->DestroyCallback != NULL) {
> -    Sock->DestroyCallback (Sock, Sock->Context);
> -  }
> -
> -  //
> -  // Retrieve the protocol installed on this sock
> -  //
> -  Status = gBS->OpenProtocol (
> -                  Sock->SockHandle,
> -                  &gEfiTcp4ProtocolGuid,
> -                  &SockProtocol,
> -                  Sock->DriverBinding,
> -                  Sock->SockHandle,
> -                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
> -                  );
> -
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockDestroyChild: Open protocol installed "
> -      "on socket failed with %r\n", Status));
> -  }
> -
> -  //
> -  // Uninstall the protocol installed on this sock
> -  // in the light of Sock->SockType
> -  //
> -  gBS->UninstallMultipleProtocolInterfaces (
> -        Sock->SockHandle,
> -        &gEfiTcp4ProtocolGuid,
> -        SockProtocol,
> -        NULL
> -        );
> -
> -  Status = EfiAcquireLockOrFail (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockDestroyChild: Get the lock to "
> -      "access socket failed with %r\n", Status));
> -
> -    return EFI_ACCESS_DENIED;
> -  }
> -
> -  //
> -  // force protocol layer to detach the PCB
> -  //
> -  Status = Sock->ProtoHandler (Sock, SOCK_DETACH, NULL);
> -
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockDestroyChild: Protocol detach socket"
> -      " failed with %r\n", Status));
> -
> -    Sock->InDestroy = FALSE;
> -  } else if (SOCK_IS_CONFIGURED (Sock)) {
> -
> -    SockConnFlush (Sock);
> -    SockSetState (Sock, SO_CLOSED);
> -
> -    Sock->ConfigureState = SO_UNCONFIGURED;
> -  }
> -
> -  EfiReleaseLock (&(Sock->Lock));
> -
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  SockDestroy (Sock);
> -  return EFI_SUCCESS;
> -}
> -
> -
> -/**
> -  Create a socket and its associated protocol control block
> -  with the intial data SockInitData and protocol specific
> -  data ProtoData.
> -
> -  @param  SockInitData         Inital data to setting the socket.
> -
> -  @return Pointer to the newly created socket. If NULL, error condition occured.
> -
> -**/
> -SOCKET *
> -SockCreateChild (
> -  IN SOCK_INIT_DATA *SockInitData
> -  )
> -{
> -  SOCKET      *Sock;
> -  VOID        *SockProtocol;
> -  EFI_STATUS  Status;
> -
> -  //
> -  // create a new socket
> -  //
> -  Sock = SockCreate (SockInitData);
> -  if (NULL == Sock) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockCreateChild: No resource to "
> -      "create a new socket\n"));
> -
> -    return NULL;
> -  }
> -
> -  Status = EfiAcquireLockOrFail (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockCreateChild: Get the lock to "
> -      "access socket failed with %r\n", Status));
> -
> -    goto ERROR;
> -  }
> -  //
> -  // inform the protocol layer to attach the socket
> -  // with a new protocol control block
> -  //
> -  Status = Sock->ProtoHandler (Sock, SOCK_ATTACH, NULL);
> -  EfiReleaseLock (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockCreateChild: Protocol failed to"
> -      " attach a socket with %r\n", Status));
> -
> -    goto ERROR;
> -  }
> -
> -  return Sock;
> -
> -ERROR:
> -
> -  if (Sock->DestroyCallback != NULL) {
> -    Sock->DestroyCallback (Sock, Sock->Context);
> -  }
> -
> -  gBS->OpenProtocol (
> -         Sock->SockHandle,
> -         &gEfiTcp4ProtocolGuid,
> -         &SockProtocol,
> -         Sock->DriverBinding,
> -         Sock->SockHandle,
> -         EFI_OPEN_PROTOCOL_GET_PROTOCOL
> -         );
> -  //
> -  // Uninstall the protocol installed on this sock
> -  //
> -  gBS->UninstallMultipleProtocolInterfaces (
> -        Sock->SockHandle,
> -        &gEfiTcp4ProtocolGuid,
> -        SockProtocol,
> -        NULL
> -        );
> -   SockDestroy (Sock);
> -   return NULL;
> -}
> -
> -
> -/**
> -  Configure the specific socket Sock using configuration data ConfigData.
> -
> -  @param  Sock                 Pointer to the socket to be configured.
> -  @param  ConfigData           Pointer to the configuration data.
> -
> -  @retval EFI_SUCCESS          The socket is configured successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket or
> the
> -                               socket is already configured.
> -
> -**/
> -EFI_STATUS
> -SockConfigure (
> -  IN SOCKET *Sock,
> -  IN VOID   *ConfigData
> -  )
> -{
> -  EFI_STATUS  Status;
> -
> -  Status = EfiAcquireLockOrFail (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockConfigure: Get the access for "
> -      "socket failed with %r", Status));
> -
> -    return EFI_ACCESS_DENIED;
> -  }
> -
> -  if (SOCK_IS_CONFIGURED (Sock)) {
> -    Status = EFI_ACCESS_DENIED;
> -    goto OnExit;
> -  }
> -
> -  ASSERT (Sock->State == SO_CLOSED);
> -
> -  Status = Sock->ProtoHandler (Sock, SOCK_CONFIGURE, ConfigData);
> -
> -OnExit:
> -  EfiReleaseLock (&(Sock->Lock));
> -
> -  return Status;
> -}
> -
> -
> -/**
> -  Initiate a connection establishment process.
> -
> -  @param  Sock                 Pointer to the socket to initiate the initate the
> -                               connection.
> -  @param  Token                Pointer to the token used for the connection
> -                               operation.
> -
> -  @retval EFI_SUCCESS          The connection is initialized successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or
> the
> -                               socket is closed, or the socket is not configured to
> -                               be an active one, or the token is already in one of
> -                               this socket's lists.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -
> -**/
> -EFI_STATUS
> -SockConnect (
> -  IN SOCKET *Sock,
> -  IN VOID   *Token
> -  )
> -{
> -  EFI_STATUS  Status;
> -  EFI_EVENT   Event;
> -
> -  Status = EfiAcquireLockOrFail (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockConnect: Get the access for "
> -      "socket failed with %r", Status));
> -
> -    return EFI_ACCESS_DENIED;
> -  }
> -
> -  if (SOCK_IS_NO_MAPPING (Sock)) {
> -    Status = EFI_NO_MAPPING;
> -    goto OnExit;
> -  }
> -
> -  if (SOCK_IS_UNCONFIGURED (Sock)) {
> -
> -    Status = EFI_NOT_STARTED;
> -    goto OnExit;
> -  }
> -
> -  if (!SOCK_IS_CLOSED (Sock) || !SOCK_IS_CONFIGURED_ACTIVE (Sock)) {
> -
> -    Status = EFI_ACCESS_DENIED;
> -    goto OnExit;
> -  }
> -
> -  Event = ((SOCK_COMPLETION_TOKEN *) Token)->Event;
> -
> -  if (SockTokenExisted (Sock, Event)) {
> -
> -    Status = EFI_ACCESS_DENIED;
> -    goto OnExit;
> -  }
> -
> -  Sock->ConnectionToken = (SOCK_COMPLETION_TOKEN *) Token;
> -  SockSetState (Sock, SO_CONNECTING);
> -  Status = Sock->ProtoHandler (Sock, SOCK_CONNECT, NULL);
> -
> -OnExit:
> -  EfiReleaseLock (&(Sock->Lock));
> -  return Status;
> -}
> -
> -
> -/**
> -  Issue a listen token to get an existed connected network instance
> -  or wait for a connection if there is none.
> -
> -  @param  Sock                 Pointer to the socket to accept connections.
> -  @param  Token                The token to accept a connection.
> -
> -  @retval EFI_SUCCESS          Either a connection is accpeted or the Token is
> -                               buffered for further acception.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or
> the
> -                               socket is closed, or the socket is not configured to
> -                               be a passive one, or the token is already in one of
> -                               this socket's lists.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -  @retval EFI_OUT_OF_RESOURCE  Failed to buffer the Token due to memory
> limit.
> -
> -**/
> -EFI_STATUS
> -SockAccept (
> -  IN SOCKET *Sock,
> -  IN VOID   *Token
> -  )
> -{
> -  EFI_TCP4_LISTEN_TOKEN *ListenToken;
> -  LIST_ENTRY            *ListEntry;
> -  EFI_STATUS            Status;
> -  SOCKET                *Socket;
> -  EFI_EVENT             Event;
> -
> -  ASSERT (SockStream == Sock->Type);
> -
> -  Status = EfiAcquireLockOrFail (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockAccept: Get the access for socket"
> -      " failed with %r", Status));
> -
> -    return EFI_ACCESS_DENIED;
> -  }
> -
> -  if (SOCK_IS_NO_MAPPING (Sock)) {
> -    Status = EFI_NO_MAPPING;
> -    goto Exit;
> -  }
> -
> -  if (SOCK_IS_UNCONFIGURED (Sock)) {
> -
> -    Status = EFI_NOT_STARTED;
> -    goto Exit;
> -  }
> -
> -  if (!SOCK_IS_LISTENING (Sock)) {
> -
> -    Status = EFI_ACCESS_DENIED;
> -    goto Exit;
> -  }
> -
> -  Event = ((SOCK_COMPLETION_TOKEN *) Token)->Event;
> -
> -  if (SockTokenExisted (Sock, Event)) {
> -
> -    Status = EFI_ACCESS_DENIED;
> -    goto Exit;
> -  }
> -
> -  ListenToken = (EFI_TCP4_LISTEN_TOKEN *) Token;
> -
> -  //
> -  // Check if a connection has already in this Sock->ConnectionList
> -  //
> -  NET_LIST_FOR_EACH (ListEntry, &Sock->ConnectionList) {
> -
> -    Socket = NET_LIST_USER_STRUCT (ListEntry, SOCKET, ConnectionList);
> -
> -    if (SOCK_IS_CONNECTED (Socket)) {
> -      ListenToken->NewChildHandle = Socket->SockHandle;
> -      SIGNAL_TOKEN (&(ListenToken->CompletionToken), EFI_SUCCESS);
> -
> -      RemoveEntryList (ListEntry);
> -
> -      ASSERT (Socket->Parent != NULL);
> -
> -      Socket->Parent->ConnCnt--;
> -
> -      DEBUG (
> -        (EFI_D_NET,
> -        "SockAccept: Accept a socket, now conncount is %d",
> -        Socket->Parent->ConnCnt)
> -        );
> -      Socket->Parent = NULL;
> -
> -      goto Exit;
> -    }
> -  }
> -
> -  //
> -  // Buffer this token for latter incoming connection request
> -  //
> -  if (NULL == SockBufferToken (Sock, &(Sock->ListenTokenList), Token, 0)) {
> -
> -    Status = EFI_OUT_OF_RESOURCES;
> -  }
> -
> -Exit:
> -  EfiReleaseLock (&(Sock->Lock));
> -
> -  return Status;
> -}
> -
> -
> -/**
> -  Issue a token with data to the socket to send out.
> -
> -  @param  Sock                 Pointer to the socket to process the token with
> -                               data.
> -  @param  Token                The token with data that needs to send out.
> -
> -  @retval EFI_SUCCESS          The token is processed successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or
> the
> -                               socket is closed, or the socket is not in a
> -                               synchronized state , or the token is already in one
> -                               of this socket's lists.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -  @retval EFI_OUT_OF_RESOURCE  Failed to buffer the token due to memory
> limit.
> -
> -**/
> -EFI_STATUS
> -SockSend (
> -  IN SOCKET *Sock,
> -  IN VOID   *Token
> -  )
> -{
> -  SOCK_IO_TOKEN           *SndToken;
> -  EFI_EVENT               Event;
> -  UINT32                  FreeSpace;
> -  EFI_TCP4_TRANSMIT_DATA  *TxData;
> -  EFI_STATUS              Status;
> -  SOCK_TOKEN              *SockToken;
> -  UINT32                  DataLen;
> -
> -  ASSERT (SockStream == Sock->Type);
> -
> -  Status = EfiAcquireLockOrFail (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockSend: Get the access for socket"
> -      " failed with %r", Status));
> -
> -    return EFI_ACCESS_DENIED;
> -  }
> -
> -  if (SOCK_IS_NO_MAPPING (Sock)) {
> -    Status = EFI_NO_MAPPING;
> -    goto Exit;
> -  }
> -
> -  SndToken  = (SOCK_IO_TOKEN *) Token;
> -  TxData    = (EFI_TCP4_TRANSMIT_DATA *) SndToken->Packet.TxData;
> -
> -  if (SOCK_IS_UNCONFIGURED (Sock)) {
> -    Status = EFI_NOT_STARTED;
> -    goto Exit;
> -  }
> -
> -  if (!(SOCK_IS_CONNECTING (Sock) || SOCK_IS_CONNECTED (Sock))) {
> -
> -    Status = EFI_ACCESS_DENIED;
> -    goto Exit;
> -  }
> -
> -  //
> -  // check if a token is already in the token buffer
> -  //
> -  Event = SndToken->Token.Event;
> -
> -  if (SockTokenExisted (Sock, Event)) {
> -    Status = EFI_ACCESS_DENIED;
> -    goto Exit;
> -  }
> -
> -  DataLen = (UINT32) TxData->DataLength;
> -
> -  //
> -  // process this sending token now or buffer it only?
> -  //
> -  FreeSpace = SockGetFreeSpace (Sock, SOCK_SND_BUF);
> -
> -  if ((FreeSpace < Sock->SndBuffer.LowWater) || !SOCK_IS_CONNECTED (Sock))
> {
> -
> -    SockToken = SockBufferToken (
> -                  Sock,
> -                  &Sock->SndTokenList,
> -                  SndToken,
> -                  DataLen
> -                  );
> -
> -    if (NULL == SockToken) {
> -      Status = EFI_OUT_OF_RESOURCES;
> -    }
> -  } else {
> -
> -    SockToken = SockBufferToken (
> -                  Sock,
> -                  &Sock->ProcessingSndTokenList,
> -                  SndToken,
> -                  DataLen
> -                  );
> -
> -    if (NULL == SockToken) {
> -      DEBUG ((EFI_D_ERROR, "SockSend: Failed to buffer IO token into"
> -        " socket processing SndToken List\n", Status));
> -
> -      Status = EFI_OUT_OF_RESOURCES;
> -      goto Exit;
> -    }
> -
> -    Status = SockProcessTcpSndData (Sock, TxData);
> -
> -    if (EFI_ERROR (Status)) {
> -      DEBUG ((EFI_D_ERROR, "SockSend: Failed to process "
> -        "Snd Data\n", Status));
> -
> -      RemoveEntryList (&(SockToken->TokenList));
> -      FreePool (SockToken);
> -    }
> -  }
> -
> -Exit:
> -  EfiReleaseLock (&(Sock->Lock));
> -  return Status;
> -}
> -
> -
> -/**
> -  Issue a token to get data from the socket.
> -
> -  @param  Sock                 Pointer to the socket to get data from.
> -  @param  Token                The token to store the received data from the
> -                               socket.
> -
> -  @retval EFI_SUCCESS          The token is processed successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or
> the
> -                               socket is closed, or the socket is not in a
> -                               synchronized state , or the token is already in one
> -                               of this socket's lists.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -  @retval EFI_CONNECTION_FIN   The connection is closed and there is no
> more data.
> -  @retval EFI_OUT_OF_RESOURCE  Failed to buffer the token due to memory
> limit.
> -
> -**/
> -EFI_STATUS
> -SockRcv (
> -  IN SOCKET *Sock,
> -  IN VOID   *Token
> -  )
> -{
> -  SOCK_IO_TOKEN *RcvToken;
> -  UINT32        RcvdBytes;
> -  EFI_STATUS    Status;
> -  EFI_EVENT     Event;
> -
> -  ASSERT (SockStream == Sock->Type);
> -
> -  Status = EfiAcquireLockOrFail (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockRcv: Get the access for socket"
> -      " failed with %r", Status));
> -
> -    return EFI_ACCESS_DENIED;
> -  }
> -
> -  if (SOCK_IS_NO_MAPPING (Sock)) {
> -
> -    Status = EFI_NO_MAPPING;
> -    goto Exit;
> -  }
> -
> -  if (SOCK_IS_UNCONFIGURED (Sock)) {
> -
> -    Status = EFI_NOT_STARTED;
> -    goto Exit;
> -  }
> -
> -  if (!(SOCK_IS_CONNECTED (Sock) || SOCK_IS_CONNECTING (Sock))) {
> -
> -    Status = EFI_ACCESS_DENIED;
> -    goto Exit;
> -  }
> -
> -  RcvToken = (SOCK_IO_TOKEN *) Token;
> -
> -  //
> -  // check if a token is already in the token buffer of this socket
> -  //
> -  Event = RcvToken->Token.Event;
> -  if (SockTokenExisted (Sock, Event)) {
> -    Status = EFI_ACCESS_DENIED;
> -    goto Exit;
> -  }
> -
> -  RcvToken  = (SOCK_IO_TOKEN *) Token;
> -  RcvdBytes = GET_RCV_DATASIZE (Sock);
> -
> -  //
> -  // check whether an error has happened before
> -  //
> -  if (EFI_ABORTED != Sock->SockError) {
> -
> -    SIGNAL_TOKEN (&(RcvToken->Token), Sock->SockError);
> -    Sock->SockError = EFI_ABORTED;
> -    goto Exit;
> -  }
> -
> -  //
> -  // check whether can not receive and there is no any
> -  // data buffered in Sock->RcvBuffer
> -  //
> -  if (SOCK_IS_NO_MORE_DATA (Sock) && (0 == RcvdBytes)) {
> -
> -    Status = EFI_CONNECTION_FIN;
> -    goto Exit;
> -  }
> -
> -  if (RcvdBytes != 0) {
> -    SockProcessRcvToken (Sock, RcvToken);
> -
> -    Status = Sock->ProtoHandler (Sock, SOCK_CONSUMED, NULL);
> -  } else {
> -
> -    if (NULL == SockBufferToken (Sock, &Sock->RcvTokenList, RcvToken, 0)) {
> -      Status = EFI_OUT_OF_RESOURCES;
> -    }
> -  }
> -
> -Exit:
> -  EfiReleaseLock (&(Sock->Lock));
> -  return Status;
> -}
> -
> -
> -/**
> -  Reset the socket and its associated protocol control block.
> -
> -  @param  Sock                 Pointer to the socket to be flushed.
> -
> -  @retval EFI_SUCCESS          The socket is flushed successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket.
> -
> -**/
> -EFI_STATUS
> -SockFlush (
> -  IN SOCKET *Sock
> -  )
> -{
> -  EFI_STATUS  Status;
> -
> -  ASSERT (SockStream == Sock->Type);
> -
> -  Status = EfiAcquireLockOrFail (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockFlush: Get the access for socket"
> -      " failed with %r", Status));
> -
> -    return EFI_ACCESS_DENIED;
> -  }
> -
> -  if (!SOCK_IS_CONFIGURED (Sock)) {
> -    goto Exit;
> -  }
> -
> -  Status = Sock->ProtoHandler (Sock, SOCK_FLUSH, NULL);
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "SockFlush: Protocol failed handling"
> -      " SOCK_FLUSH with %r", Status));
> -
> -    goto Exit;
> -  }
> -
> -  SOCK_ERROR (Sock, EFI_ABORTED);
> -  SockConnFlush (Sock);
> -  SockSetState (Sock, SO_CLOSED);
> -
> -  Sock->ConfigureState = SO_UNCONFIGURED;
> -
> -Exit:
> -  EfiReleaseLock (&(Sock->Lock));
> -  return Status;
> -}
> -
> -
> -/**
> -  Close or abort the socket associated connection.
> -
> -  @param  Sock                 Pointer to the socket of the connection to close or
> -                               abort.
> -  @param  Token                The token for close operation.
> -  @param  OnAbort              TRUE for aborting the connection, FALSE to close it.
> -
> -  @retval EFI_SUCCESS          The close or abort operation is initialized
> -                               successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or
> the
> -                               socket is closed, or the socket is not in a
> -                               synchronized state , or the token is already in one
> -                               of this socket's lists.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -
> -**/
> -EFI_STATUS
> -SockClose (
> -  IN SOCKET  *Sock,
> -  IN VOID    *Token,
> -  IN BOOLEAN OnAbort
> -  )
> -{
> -  EFI_STATUS  Status;
> -  EFI_EVENT   Event;
> -
> -  ASSERT (SockStream == Sock->Type);
> -
> -  Status = EfiAcquireLockOrFail (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -    DEBUG ((EFI_D_ERROR, "SockClose: Get the access for socket"
> -      " failed with %r", Status));
> -
> -    return EFI_ACCESS_DENIED;
> -  }
> -
> -  if (SOCK_IS_NO_MAPPING (Sock)) {
> -    Status = EFI_NO_MAPPING;
> -    goto Exit;
> -  }
> -
> -  if (SOCK_IS_UNCONFIGURED (Sock)) {
> -    Status = EFI_NOT_STARTED;
> -    goto Exit;
> -  }
> -
> -  if (SOCK_IS_DISCONNECTING (Sock)) {
> -    Status = EFI_ACCESS_DENIED;
> -    goto Exit;
> -  }
> -
> -  Event = ((SOCK_COMPLETION_TOKEN *) Token)->Event;
> -
> -  if (SockTokenExisted (Sock, Event)) {
> -    Status = EFI_ACCESS_DENIED;
> -    goto Exit;
> -  }
> -
> -  Sock->CloseToken = Token;
> -  SockSetState (Sock, SO_DISCONNECTING);
> -
> -  if (OnAbort) {
> -    Status = Sock->ProtoHandler (Sock, SOCK_ABORT, NULL);
> -  } else {
> -    Status = Sock->ProtoHandler (Sock, SOCK_CLOSE, NULL);
> -  }
> -
> -Exit:
> -  EfiReleaseLock (&(Sock->Lock));
> -  return Status;
> -}
> -
> -
> -/**
> -  Get the mode data of the low layer protocol.
> -
> -  @param  Sock                 Pointer to the socket to get mode data from.
> -  @param  Mode                 Pointer to the data to store the low layer mode
> -                               information.
> -
> -  @retval EFI_SUCCESS          The mode data is got successfully.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -
> -**/
> -EFI_STATUS
> -SockGetMode (
> -  IN     SOCKET *Sock,
> -  IN OUT VOID   *Mode
> -  )
> -{
> -  return Sock->ProtoHandler (Sock, SOCK_MODE, Mode);
> -}
> -
> -
> -
> -
> -
> -/**
> -  Add or remove route information in IP route table associated
> -  with this socket.
> -
> -  @param  Sock                 Pointer to the socket associated with the IP route
> -                               table to operate on.
> -  @param  RouteInfo            Pointer to the route information to be processed.
> -
> -  @retval EFI_SUCCESS          The route table is updated successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is  not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -
> -**/
> -EFI_STATUS
> -SockRoute (
> -  IN SOCKET    *Sock,
> -  IN VOID      *RouteInfo
> -  )
> -{
> -  EFI_STATUS  Status;
> -
> -  Status = EfiAcquireLockOrFail (&(Sock->Lock));
> -  if (EFI_ERROR (Status)) {
> -    DEBUG ((EFI_D_ERROR, "SockRoute: Get the access for socket"
> -      " failed with %r", Status));
> -
> -    return EFI_ACCESS_DENIED;
> -  }
> -
> -  if (SOCK_IS_NO_MAPPING (Sock)) {
> -    Status = EFI_NO_MAPPING;
> -    goto Exit;
> -  }
> -
> -  if (SOCK_IS_UNCONFIGURED (Sock)) {
> -    Status = EFI_NOT_STARTED;
> -    goto Exit;
> -  }
> -
> -  Status = Sock->ProtoHandler (Sock, SOCK_ROUTE, RouteInfo);
> -
> -Exit:
> -  EfiReleaseLock (&(Sock->Lock));
> -  return Status;
> -}
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c
> deleted file mode 100644
> index a0f97d603171..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c
> +++ /dev/null
> @@ -1,717 +0,0 @@
> -/** @file
> -  Tcp request dispatcher implementation.
> -
> -(C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#include "Tcp4Main.h"
> -
> -#define TCP_COMP_VAL(Min, Max, Default, Val) \
> -  ((((Val) <= (Max)) && ((Val) >= (Min))) ? (Val) : (Default))
> -
> -/**
> -  Add or remove a route entry in the IP route table associated with this TCP
> instance.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -  @param  RouteInfo             Pointer to the route info to be processed.
> -
> -  @retval EFI_SUCCESS           The operation completed successfully.
> -  @retval EFI_NOT_STARTED       The driver instance has not been started.
> -  @retval EFI_NO_MAPPING        When using the default address,
> configuration(DHCP,
> -                                BOOTP, RARP, etc.) is not finished yet.
> -  @retval EFI_OUT_OF_RESOURCES  Could not add the entry to the routing
> table.
> -  @retval EFI_NOT_FOUND         This route is not in the routing table
> -                                (when RouteInfo->DeleteRoute is TRUE).
> -  @retval EFI_ACCESS_DENIED     The route is already defined in the routing
> table
> -                                (when RouteInfo->DeleteRoute is FALSE).
> -**/
> -EFI_STATUS
> -Tcp4Route (
> -  IN TCP_CB           *Tcb,
> -  IN TCP4_ROUTE_INFO  *RouteInfo
> -  )
> -{
> -  EFI_IP4_PROTOCOL  *Ip4;
> -
> -  Ip4 = Tcb->IpInfo->Ip.Ip4;
> -
> -  ASSERT (Ip4 != NULL);
> -
> -  return Ip4->Routes (
> -              Ip4,
> -              RouteInfo->DeleteRoute,
> -              RouteInfo->SubnetAddress,
> -              RouteInfo->SubnetMask,
> -              RouteInfo->GatewayAddress
> -              );
> -
> -}
> -
> -
> -/**
> -  Get the operational settings of this TCP instance.
> -
> -  @param  Tcb                    Pointer to the TCP_CB of this TCP instance.
> -  @param  Mode                   Pointer to the buffer to store the operational
> -                                 settings.
> -
> -  @retval EFI_SUCCESS            The mode data is read.
> -  @retval EFI_NOT_STARTED        No configuration data is available because this
> -                                 instance hasn't been started.
> -
> -**/
> -EFI_STATUS
> -Tcp4GetMode (
> -  IN     TCP_CB         *Tcb,
> -  IN OUT TCP4_MODE_DATA *Mode
> -  )
> -{
> -  SOCKET                *Sock;
> -  EFI_TCP4_CONFIG_DATA  *ConfigData;
> -  EFI_TCP4_ACCESS_POINT *AccessPoint;
> -  EFI_TCP4_OPTION       *Option;
> -  EFI_IP4_PROTOCOL      *Ip;
> -
> -  Sock = Tcb->Sk;
> -
> -  if (!SOCK_IS_CONFIGURED (Sock) && (Mode->Tcp4ConfigData != NULL)) {
> -    return EFI_NOT_STARTED;
> -  }
> -
> -  if (Mode->Tcp4State != NULL) {
> -    *(Mode->Tcp4State) = (EFI_TCP4_CONNECTION_STATE) Tcb->State;
> -  }
> -
> -  if (Mode->Tcp4ConfigData != NULL) {
> -
> -    ConfigData                      = Mode->Tcp4ConfigData;
> -    AccessPoint                     = &(ConfigData->AccessPoint);
> -    Option                          = ConfigData->ControlOption;
> -
> -    ConfigData->TypeOfService       = Tcb->Tos;
> -    ConfigData->TimeToLive          = Tcb->Ttl;
> -
> -    AccessPoint->UseDefaultAddress  = Tcb->UseDefaultAddr;
> -
> -    IP4_COPY_ADDRESS (&AccessPoint->StationAddress, &Tcb->LocalEnd.Ip);
> -    IP4_COPY_ADDRESS (&AccessPoint->SubnetMask, &Tcb->SubnetMask);
> -    AccessPoint->StationPort        = NTOHS (Tcb->LocalEnd.Port);
> -
> -    IP4_COPY_ADDRESS (&AccessPoint->RemoteAddress, &Tcb->RemoteEnd.Ip);
> -    AccessPoint->RemotePort         = NTOHS (Tcb->RemoteEnd.Port);
> -    AccessPoint->ActiveFlag         = (BOOLEAN) (Tcb->State != TCP_LISTEN);
> -
> -    if (Option != NULL) {
> -      Option->ReceiveBufferSize       = GET_RCV_BUFFSIZE (Tcb->Sk);
> -      Option->SendBufferSize          = GET_SND_BUFFSIZE (Tcb->Sk);
> -      Option->MaxSynBackLog           = GET_BACKLOG (Tcb->Sk);
> -
> -      Option->ConnectionTimeout       = Tcb->ConnectTimeout / TCP_TICK_HZ;
> -      Option->DataRetries             = Tcb->MaxRexmit;
> -      Option->FinTimeout              = Tcb->FinWait2Timeout / TCP_TICK_HZ;
> -      Option->TimeWaitTimeout         = Tcb->TimeWaitTimeout / TCP_TICK_HZ;
> -      Option->KeepAliveProbes         = Tcb->MaxKeepAlive;
> -      Option->KeepAliveTime           = Tcb->KeepAliveIdle / TCP_TICK_HZ;
> -      Option->KeepAliveInterval       = Tcb->KeepAlivePeriod / TCP_TICK_HZ;
> -
> -      Option->EnableNagle         = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag,
> TCP_CTRL_NO_NAGLE));
> -      Option->EnableTimeStamp     = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag,
> TCP_CTRL_NO_TS));
> -      Option->EnableWindowScaling = (BOOLEAN) (!TCP_FLG_ON (Tcb->CtrlFlag,
> TCP_CTRL_NO_WS));
> -
> -      Option->EnableSelectiveAck      = FALSE;
> -      Option->EnablePathMtuDiscovery  = FALSE;
> -    }
> -  }
> -
> -  Ip = Tcb->IpInfo->Ip.Ip4;
> -  ASSERT (Ip != NULL);
> -
> -  return Ip->GetModeData (Ip, Mode->Ip4ModeData, Mode->MnpConfigData,
> Mode->SnpModeData);
> -}
> -
> -
> -/**
> -  If AP->StationPort isn't zero, check whether the access point
> -  is registered, else generate a random station port for this
> -  access point.
> -
> -  @param  AP                     Pointer to the access point.
> -
> -  @retval EFI_SUCCESS            The check is passed or the port is assigned.
> -  @retval EFI_INVALID_PARAMETER  The non-zero station port is already used.
> -  @retval EFI_OUT_OF_RESOURCES   No port can be allocated.
> -
> -**/
> -EFI_STATUS
> -Tcp4Bind (
> -  IN EFI_TCP4_ACCESS_POINT *AP
> -  )
> -{
> -  BOOLEAN Cycle;
> -
> -  if (0 != AP->StationPort) {
> -    //
> -    // check if a same endpoint is bound
> -    //
> -    if (TcpFindTcbByPeer (&AP->StationAddress, AP->StationPort)) {
> -
> -      return EFI_INVALID_PARAMETER;
> -    }
> -  } else {
> -    //
> -    // generate a random port
> -    //
> -    Cycle = FALSE;
> -
> -    if (TCP4_PORT_USER_RESERVED == mTcp4RandomPort) {
> -      mTcp4RandomPort = TCP4_PORT_KNOWN;
> -    }
> -
> -    mTcp4RandomPort++;
> -
> -    while (TcpFindTcbByPeer (&AP->StationAddress, mTcp4RandomPort)) {
> -
> -      mTcp4RandomPort++;
> -
> -      if (mTcp4RandomPort <= TCP4_PORT_KNOWN) {
> -
> -        if (Cycle) {
> -          DEBUG ((EFI_D_ERROR, "Tcp4Bind: no port can be allocated "
> -            "for this pcb\n"));
> -
> -          return EFI_OUT_OF_RESOURCES;
> -        }
> -
> -        mTcp4RandomPort = TCP4_PORT_KNOWN + 1;
> -
> -        Cycle = TRUE;
> -      }
> -
> -    }
> -
> -    AP->StationPort = mTcp4RandomPort;
> -  }
> -
> -  return EFI_SUCCESS;
> -}
> -
> -
> -/**
> -  Flush the Tcb add its associated protocols.
> -
> -  @param  Tcb                    Pointer to the TCP_CB to be flushed.
> -
> -**/
> -VOID
> -Tcp4FlushPcb (
> -  IN TCP_CB *Tcb
> -  )
> -{
> -  SOCKET           *Sock;
> -
> -  IpIoConfigIp (Tcb->IpInfo, NULL);
> -
> -  Sock     = Tcb->Sk;
> -
> -  if (SOCK_IS_CONFIGURED (Sock)) {
> -    RemoveEntryList (&Tcb->List);
> -
> -    //
> -    // Uninstall the device path protocol.
> -    //
> -    if (Sock->DevicePath != NULL) {
> -      gBS->UninstallProtocolInterface (
> -             Sock->SockHandle,
> -             &gEfiDevicePathProtocolGuid,
> -             Sock->DevicePath
> -             );
> -      FreePool (Sock->DevicePath);
> -    }
> -  }
> -
> -  NetbufFreeList (&Tcb->SndQue);
> -  NetbufFreeList (&Tcb->RcvQue);
> -  Tcb->State = TCP_CLOSED;
> -}
> -
> -/**
> -  Attach a Pcb to the socket.
> -
> -  @param  Sk                     Pointer to the socket of this TCP instance.
> -
> -  @retval EFI_SUCCESS            The operation is completed successfully.
> -  @retval EFI_OUT_OF_RESOURCES   Failed due to resource limit.
> -
> -**/
> -EFI_STATUS
> -Tcp4AttachPcb (
> -  IN SOCKET  *Sk
> -  )
> -{
> -  TCP_CB            *Tcb;
> -  TCP4_PROTO_DATA   *ProtoData;
> -  IP_IO             *IpIo;
> -  EFI_STATUS        Status;
> -  VOID              *Ip;
> -
> -  Tcb = AllocateZeroPool (sizeof (TCP_CB));
> -
> -  if (Tcb == NULL) {
> -
> -    DEBUG ((EFI_D_ERROR, "Tcp4ConfigurePcb: failed to allocate a TCB\n"));
> -
> -    return EFI_OUT_OF_RESOURCES;
> -  }
> -
> -  ProtoData  = (TCP4_PROTO_DATA *) Sk->ProtoReserved;
> -  IpIo       = ProtoData->TcpService->IpIo;
> -
> -  //
> -  // Create an IpInfo for this Tcb.
> -  //
> -  Tcb->IpInfo = IpIoAddIp (IpIo);
> -  if (Tcb->IpInfo == NULL) {
> -
> -    FreePool (Tcb);
> -    return EFI_OUT_OF_RESOURCES;
> -  }
> -
> -  //
> -  // Open the new created IP instance BY_CHILD.
> -  //
> -  Status = gBS->OpenProtocol (
> -                  Tcb->IpInfo->ChildHandle,
> -                  &gEfiIp4ProtocolGuid,
> -                  &Ip,
> -                  IpIo->Image,
> -                  Sk->SockHandle,
> -                  EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
> -                  );
> -  if (EFI_ERROR (Status)) {
> -    IpIoRemoveIp (IpIo, Tcb->IpInfo);
> -    return Status;
> -  }
> -
> -  InitializeListHead (&Tcb->List);
> -  InitializeListHead (&Tcb->SndQue);
> -  InitializeListHead (&Tcb->RcvQue);
> -
> -  Tcb->State        = TCP_CLOSED;
> -  Tcb->Sk           = Sk;
> -  ProtoData->TcpPcb = Tcb;
> -
> -  return EFI_SUCCESS;
> -}
> -
> -/**
> -  Detach the Pcb of the socket.
> -
> -  @param  Sk                     Pointer to the socket of this TCP instance.
> -
> -**/
> -VOID
> -Tcp4DetachPcb (
> -  IN SOCKET  *Sk
> -  )
> -{
> -  TCP4_PROTO_DATA  *ProtoData;
> -  TCP_CB           *Tcb;
> -
> -  ProtoData = (TCP4_PROTO_DATA *) Sk->ProtoReserved;
> -  Tcb       = ProtoData->TcpPcb;
> -
> -  ASSERT (Tcb != NULL);
> -
> -  Tcp4FlushPcb (Tcb);
> -
> -  IpIoRemoveIp (ProtoData->TcpService->IpIo, Tcb->IpInfo);
> -
> -  FreePool (Tcb);
> -
> -  ProtoData->TcpPcb = NULL;
> -}
> -
> -
> -/**
> -  Configure the Pcb using CfgData.
> -
> -  @param  Sk                     Pointer to the socket of this TCP instance.
> -  @param  CfgData                Pointer to the TCP configuration data.
> -
> -  @retval EFI_SUCCESS            The operation is completed successfully.
> -  @retval EFI_INVALID_PARAMETER  A same access point has been configured
> in
> -                                 another TCP instance.
> -  @retval EFI_OUT_OF_RESOURCES   Failed due to resource limit.
> -
> -**/
> -EFI_STATUS
> -Tcp4ConfigurePcb (
> -  IN SOCKET               *Sk,
> -  IN EFI_TCP4_CONFIG_DATA *CfgData
> -  )
> -{
> -  EFI_IP4_CONFIG_DATA IpCfgData;
> -  EFI_STATUS          Status;
> -  EFI_TCP4_OPTION     *Option;
> -  TCP4_PROTO_DATA     *TcpProto;
> -  TCP_CB              *Tcb;
> -
> -  ASSERT ((CfgData != NULL) && (Sk != NULL) && (Sk->SockHandle != NULL));
> -
> -  TcpProto = (TCP4_PROTO_DATA *) Sk->ProtoReserved;
> -  Tcb      = TcpProto->TcpPcb;
> -
> -  ASSERT (Tcb != NULL);
> -
> -  //
> -  // Add Ip for send pkt to the peer
> -  //
> -  CopyMem (&IpCfgData, &mIp4IoDefaultIpConfigData, sizeof (IpCfgData));
> -  IpCfgData.DefaultProtocol   = EFI_IP_PROTO_TCP;
> -  IpCfgData.UseDefaultAddress = CfgData->AccessPoint.UseDefaultAddress;
> -  IpCfgData.StationAddress    = CfgData->AccessPoint.StationAddress;
> -  IpCfgData.SubnetMask        = CfgData->AccessPoint.SubnetMask;
> -  IpCfgData.ReceiveTimeout    = (UINT32) (-1);
> -
> -  //
> -  // Configure the IP instance this Tcb consumes.
> -  //
> -  Status = IpIoConfigIp (Tcb->IpInfo, &IpCfgData);
> -  if (EFI_ERROR (Status)) {
> -    goto OnExit;
> -  }
> -
> -  //
> -  // Get the default address info if the instance is configured to use default
> address.
> -  //
> -  if (CfgData->AccessPoint.UseDefaultAddress) {
> -    CfgData->AccessPoint.StationAddress = IpCfgData.StationAddress;
> -    CfgData->AccessPoint.SubnetMask     = IpCfgData.SubnetMask;
> -  }
> -
> -  //
> -  // check if we can bind this endpoint in CfgData
> -  //
> -  Status = Tcp4Bind (&(CfgData->AccessPoint));
> -
> -  if (EFI_ERROR (Status)) {
> -    DEBUG ((EFI_D_ERROR, "Tcp4ConfigurePcb: Bind endpoint failed "
> -      "with %r\n", Status));
> -
> -    goto OnExit;
> -  }
> -
> -  //
> -  // Initalize the operating information in this Tcb
> -  //
> -  ASSERT (Tcb->State == TCP_CLOSED &&
> -    IsListEmpty (&Tcb->SndQue) &&
> -    IsListEmpty (&Tcb->RcvQue));
> -
> -  TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE);
> -  Tcb->State            = TCP_CLOSED;
> -
> -  Tcb->SndMss           = 536;
> -  Tcb->RcvMss           = TcpGetRcvMss (Sk);
> -
> -  Tcb->SRtt             = 0;
> -  Tcb->Rto              = 3 * TCP_TICK_HZ;
> -
> -  Tcb->CWnd             = Tcb->SndMss;
> -  Tcb->Ssthresh         = 0xffffffff;
> -
> -  Tcb->CongestState     = TCP_CONGEST_OPEN;
> -
> -  Tcb->KeepAliveIdle    = TCP_KEEPALIVE_IDLE_MIN;
> -  Tcb->KeepAlivePeriod  = TCP_KEEPALIVE_PERIOD;
> -  Tcb->MaxKeepAlive     = TCP_MAX_KEEPALIVE;
> -  Tcb->MaxRexmit        = TCP_MAX_LOSS;
> -  Tcb->FinWait2Timeout  = TCP_FIN_WAIT2_TIME;
> -  Tcb->TimeWaitTimeout  = TCP_TIME_WAIT_TIME;
> -  Tcb->ConnectTimeout   = TCP_CONNECT_TIME;
> -
> -  //
> -  // initialize Tcb in the light of CfgData
> -  //
> -  Tcb->Ttl            = CfgData->TimeToLive;
> -  Tcb->Tos            = CfgData->TypeOfService;
> -
> -  Tcb->UseDefaultAddr = CfgData->AccessPoint.UseDefaultAddress;
> -
> -  CopyMem (&Tcb->LocalEnd.Ip, &CfgData->AccessPoint.StationAddress, sizeof
> (IP4_ADDR));
> -  Tcb->LocalEnd.Port  = HTONS (CfgData->AccessPoint.StationPort);
> -  IP4_COPY_ADDRESS (&Tcb->SubnetMask, &CfgData-
> >AccessPoint.SubnetMask);
> -
> -  if (CfgData->AccessPoint.ActiveFlag) {
> -    CopyMem (&Tcb->RemoteEnd.Ip, &CfgData->AccessPoint.RemoteAddress,
> sizeof (IP4_ADDR));
> -    Tcb->RemoteEnd.Port = HTONS (CfgData->AccessPoint.RemotePort);
> -  } else {
> -    Tcb->RemoteEnd.Ip   = 0;
> -    Tcb->RemoteEnd.Port = 0;
> -  }
> -
> -  Option              = CfgData->ControlOption;
> -
> -  if (Option != NULL) {
> -    SET_RCV_BUFFSIZE (
> -      Sk,
> -      (UINT32) (TCP_COMP_VAL (
> -                  TCP_RCV_BUF_SIZE_MIN,
> -                  TCP_RCV_BUF_SIZE,
> -                  TCP_RCV_BUF_SIZE,
> -                  Option->ReceiveBufferSize
> -                  )
> -               )
> -      );
> -    SET_SND_BUFFSIZE (
> -      Sk,
> -      (UINT32) (TCP_COMP_VAL (
> -                  TCP_SND_BUF_SIZE_MIN,
> -                  TCP_SND_BUF_SIZE,
> -                  TCP_SND_BUF_SIZE,
> -                  Option->SendBufferSize
> -                  )
> -               )
> -      );
> -
> -    SET_BACKLOG (
> -      Sk,
> -      (UINT32) (TCP_COMP_VAL (
> -                  TCP_BACKLOG_MIN,
> -                  TCP_BACKLOG,
> -                  TCP_BACKLOG,
> -                  Option->MaxSynBackLog
> -                  )
> -               )
> -      );
> -
> -    Tcb->MaxRexmit = (UINT16) TCP_COMP_VAL (
> -                                TCP_MAX_LOSS_MIN,
> -                                TCP_MAX_LOSS,
> -                                TCP_MAX_LOSS,
> -                                Option->DataRetries
> -                                );
> -    Tcb->FinWait2Timeout = TCP_COMP_VAL (
> -                              TCP_FIN_WAIT2_TIME,
> -                              TCP_FIN_WAIT2_TIME_MAX,
> -                              TCP_FIN_WAIT2_TIME,
> -                              (UINT32) (Option->FinTimeout * TCP_TICK_HZ)
> -                              );
> -
> -    if (Option->TimeWaitTimeout != 0) {
> -      Tcb->TimeWaitTimeout = TCP_COMP_VAL (
> -                               TCP_TIME_WAIT_TIME,
> -                               TCP_TIME_WAIT_TIME_MAX,
> -                               TCP_TIME_WAIT_TIME,
> -                               (UINT32) (Option->TimeWaitTimeout * TCP_TICK_HZ)
> -                               );
> -    } else {
> -      Tcb->TimeWaitTimeout = 0;
> -    }
> -
> -    if (Option->KeepAliveProbes != 0) {
> -      TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE);
> -
> -      Tcb->MaxKeepAlive = (UINT8) TCP_COMP_VAL (
> -                                    TCP_MAX_KEEPALIVE_MIN,
> -                                    TCP_MAX_KEEPALIVE,
> -                                    TCP_MAX_KEEPALIVE,
> -                                    Option->KeepAliveProbes
> -                                    );
> -      Tcb->KeepAliveIdle = TCP_COMP_VAL (
> -                             TCP_KEEPALIVE_IDLE_MIN,
> -                             TCP_KEEPALIVE_IDLE_MAX,
> -                             TCP_KEEPALIVE_IDLE_MIN,
> -                             (UINT32) (Option->KeepAliveTime * TCP_TICK_HZ)
> -                             );
> -      Tcb->KeepAlivePeriod = TCP_COMP_VAL (
> -                               TCP_KEEPALIVE_PERIOD_MIN,
> -                               TCP_KEEPALIVE_PERIOD,
> -                               TCP_KEEPALIVE_PERIOD,
> -                               (UINT32) (Option->KeepAliveInterval * TCP_TICK_HZ)
> -                               );
> -    }
> -
> -    Tcb->ConnectTimeout = TCP_COMP_VAL (
> -                            TCP_CONNECT_TIME_MIN,
> -                            TCP_CONNECT_TIME,
> -                            TCP_CONNECT_TIME,
> -                            (UINT32) (Option->ConnectionTimeout * TCP_TICK_HZ)
> -                            );
> -
> -    if (!Option->EnableNagle) {
> -      TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_NAGLE);
> -    }
> -
> -    if (!Option->EnableTimeStamp) {
> -      TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_TS);
> -    }
> -
> -    if (!Option->EnableWindowScaling) {
> -      TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_NO_WS);
> -    }
> -  }
> -
> -  //
> -  // The socket is bound, the <SrcIp, SrcPort, DstIp, DstPort> is
> -  // determined, construct the IP device path and install it.
> -  //
> -  Status = TcpInstallDevicePath (Sk);
> -  if (EFI_ERROR (Status)) {
> -    goto OnExit;
> -  }
> -
> -  //
> -  // update state of Tcb and socket
> -  //
> -  if (!CfgData->AccessPoint.ActiveFlag) {
> -
> -    TcpSetState (Tcb, TCP_LISTEN);
> -    SockSetState (Sk, SO_LISTENING);
> -
> -    Sk->ConfigureState = SO_CONFIGURED_PASSIVE;
> -  } else {
> -
> -    Sk->ConfigureState = SO_CONFIGURED_ACTIVE;
> -  }
> -
> -  TcpInsertTcb (Tcb);
> -
> -OnExit:
> -
> -  return Status;
> -}
> -
> -
> -/**
> -  The procotol handler provided to the socket layer, used to
> -  dispatch the socket level requests by calling the corresponding
> -  TCP layer functions.
> -
> -  @param  Sock                   Pointer to the socket of this TCP instance.
> -  @param  Request                The code of this operation request.
> -  @param  Data                   Pointer to the operation specific data passed in
> -                                 together with the operation request.
> -
> -  @retval EFI_SUCCESS            The socket request is completed successfully.
> -  @retval other                  The error status returned by the corresponding TCP
> -                                 layer function.
> -
> -**/
> -EFI_STATUS
> -Tcp4Dispatcher (
> -  IN SOCKET                  *Sock,
> -  IN UINT8                   Request,
> -  IN VOID                    *Data    OPTIONAL
> -  )
> -{
> -  TCP_CB            *Tcb;
> -  TCP4_PROTO_DATA   *ProtoData;
> -  EFI_IP4_PROTOCOL  *Ip;
> -
> -  ProtoData = (TCP4_PROTO_DATA *) Sock->ProtoReserved;
> -  Tcb       = ProtoData->TcpPcb;
> -
> -  switch (Request) {
> -  case SOCK_POLL:
> -    Ip = ProtoData->TcpService->IpIo->Ip.Ip4;
> -    Ip->Poll (Ip);
> -    break;
> -
> -  case SOCK_CONSUMED:
> -    //
> -    // After user received data from socket buffer, socket will
> -    // notify TCP using this message to give it a chance to send out
> -    // window update information
> -    //
> -    ASSERT (Tcb != NULL);
> -    TcpOnAppConsume (Tcb);
> -    break;
> -
> -  case SOCK_SND:
> -
> -    ASSERT (Tcb != NULL);
> -    TcpOnAppSend (Tcb);
> -    break;
> -
> -  case SOCK_CLOSE:
> -
> -    TcpOnAppClose (Tcb);
> -
> -    break;
> -
> -  case SOCK_ABORT:
> -
> -    TcpOnAppAbort (Tcb);
> -
> -    break;
> -
> -  case SOCK_SNDPUSH:
> -    Tcb->SndPsh = TcpGetMaxSndNxt (Tcb) + GET_SND_DATASIZE (Tcb->Sk);
> -    TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_PSH);
> -
> -    break;
> -
> -  case SOCK_SNDURG:
> -    Tcb->SndUp = TcpGetMaxSndNxt (Tcb) + GET_SND_DATASIZE (Tcb->Sk) - 1;
> -    TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_URG);
> -
> -    break;
> -
> -  case SOCK_CONNECT:
> -
> -    TcpOnAppConnect (Tcb);
> -
> -    break;
> -
> -  case SOCK_ATTACH:
> -
> -    return Tcp4AttachPcb (Sock);
> -
> -  case SOCK_FLUSH:
> -
> -    Tcp4FlushPcb (Tcb);
> -
> -    break;
> -
> -  case SOCK_DETACH:
> -
> -    Tcp4DetachPcb (Sock);
> -
> -    break;
> -
> -  case SOCK_CONFIGURE:
> -
> -    return Tcp4ConfigurePcb (
> -            Sock,
> -            (EFI_TCP4_CONFIG_DATA *) Data
> -            );
> -
> -  case SOCK_MODE:
> -
> -    ASSERT ((Data != NULL) && (Tcb != NULL));
> -
> -    return Tcp4GetMode (Tcb, (TCP4_MODE_DATA *) Data);
> -
> -  case SOCK_ROUTE:
> -
> -    ASSERT ((Data != NULL) && (Tcb != NULL));
> -
> -    return Tcp4Route (Tcb, (TCP4_ROUTE_INFO *) Data);
> -
> -  default:
> -    return EFI_UNSUPPORTED;
> -  }
> -
> -  return EFI_SUCCESS;
> -
> -}
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.c
> deleted file mode 100644
> index 2ff8eee8693b..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.c
> +++ /dev/null
> @@ -1,782 +0,0 @@
> -/** @file
> -  Tcp driver function.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#include "Tcp4Main.h"
> -
> -
> -UINT16                                mTcp4RandomPort;
> -extern EFI_COMPONENT_NAME_PROTOCOL    gTcp4ComponentName;
> -extern EFI_COMPONENT_NAME2_PROTOCOL   gTcp4ComponentName2;
> -extern EFI_UNICODE_STRING_TABLE       *gTcpControllerNameTable;
> -
> -TCP4_HEARTBEAT_TIMER  mTcp4Timer = {
> -  NULL,
> -  0
> -};
> -
> -EFI_TCP4_PROTOCOL mTcp4ProtocolTemplate = {
> -  Tcp4GetModeData,
> -  Tcp4Configure,
> -  Tcp4Routes,
> -  Tcp4Connect,
> -  Tcp4Accept,
> -  Tcp4Transmit,
> -  Tcp4Receive,
> -  Tcp4Close,
> -  Tcp4Cancel,
> -  Tcp4Poll
> -};
> -
> -SOCK_INIT_DATA mTcp4DefaultSockData = {
> -  SockStream,
> -  0,
> -  NULL,
> -  TCP_BACKLOG,
> -  TCP_SND_BUF_SIZE,
> -  TCP_RCV_BUF_SIZE,
> -  &mTcp4ProtocolTemplate,
> -  Tcp4CreateSocketCallback,
> -  Tcp4DestroySocketCallback,
> -  NULL,
> -  NULL,
> -  0,
> -  Tcp4Dispatcher,
> -  NULL,
> -};
> -
> -EFI_DRIVER_BINDING_PROTOCOL mTcp4DriverBinding = {
> -  Tcp4DriverBindingSupported,
> -  Tcp4DriverBindingStart,
> -  Tcp4DriverBindingStop,
> -  0xa,
> -  NULL,
> -  NULL
> -};
> -
> -EFI_SERVICE_BINDING_PROTOCOL mTcp4ServiceBinding = {
> -  Tcp4ServiceBindingCreateChild,
> -  Tcp4ServiceBindingDestroyChild
> -};
> -
> -
> -/**
> -  Create and start the heartbeat timer for TCP driver.
> -
> -  @retval EFI_SUCCESS            The timer is successfully created and started.
> -  @retval other                  The timer is not created.
> -
> -**/
> -EFI_STATUS
> -Tcp4CreateTimer (
> -  VOID
> -  )
> -{
> -  EFI_STATUS  Status;
> -
> -  Status = EFI_SUCCESS;
> -
> -  if (mTcp4Timer.RefCnt == 0) {
> -
> -    Status = gBS->CreateEvent (
> -                    EVT_TIMER | EVT_NOTIFY_SIGNAL,
> -                    TPL_NOTIFY,
> -                    TcpTicking,
> -                    NULL,
> -                    &mTcp4Timer.TimerEvent
> -                    );
> -    if (!EFI_ERROR (Status)) {
> -
> -      Status = gBS->SetTimer (
> -                      mTcp4Timer.TimerEvent,
> -                      TimerPeriodic,
> -                      (UINT64) (TICKS_PER_SECOND / TCP_TICK_HZ)
> -                      );
> -    }
> -  }
> -
> -  if (!EFI_ERROR (Status)) {
> -
> -    mTcp4Timer.RefCnt++;
> -  }
> -
> -  return Status;
> -}
> -
> -
> -/**
> -  Stop and destroy the heartbeat timer for TCP driver.
> -
> -**/
> -VOID
> -Tcp4DestroyTimer (
> -  VOID
> -  )
> -{
> -  ASSERT (mTcp4Timer.RefCnt > 0);
> -
> -  mTcp4Timer.RefCnt--;
> -
> -  if (mTcp4Timer.RefCnt > 0) {
> -    return;
> -  }
> -
> -  gBS->SetTimer (mTcp4Timer.TimerEvent, TimerCancel, 0);
> -  gBS->CloseEvent (mTcp4Timer.TimerEvent);
> -  mTcp4Timer.TimerEvent = NULL;
> -}
> -
> -/**
> -  Callback function which provided by user to remove one node in
> NetDestroyLinkList process.
> -
> -  @param[in]    Entry           The entry to be removed.
> -  @param[in]    Context         Pointer to the callback context corresponds to the
> Context in NetDestroyLinkList.
> -
> -  @retval EFI_SUCCESS           The entry has been removed successfully.
> -  @retval Others                Fail to remove the entry.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4DestroyChildEntryInHandleBuffer (
> -  IN LIST_ENTRY         *Entry,
> -  IN VOID               *Context
> -  )
> -{
> -  SOCKET                        *Sock;
> -  EFI_SERVICE_BINDING_PROTOCOL  *ServiceBinding;
> -  UINTN                         NumberOfChildren;
> -  EFI_HANDLE                    *ChildHandleBuffer;
> -
> -  if (Entry == NULL || Context == NULL) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  Sock = NET_LIST_USER_STRUCT_S (Entry, SOCKET, Link, SOCK_SIGNATURE);
> -  ServiceBinding    = ((TCP4_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT *)
> Context)->ServiceBinding;
> -  NumberOfChildren  = ((TCP4_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT *)
> Context)->NumberOfChildren;
> -  ChildHandleBuffer = ((TCP4_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT *)
> Context)->ChildHandleBuffer;
> -
> -  if (!NetIsInHandleBuffer (Sock->SockHandle, NumberOfChildren,
> ChildHandleBuffer)) {
> -    return EFI_SUCCESS;
> -  }
> -
> -  return ServiceBinding->DestroyChild (ServiceBinding, Sock->SockHandle);
> -}
> -
> -/**
> -  The entry point for Tcp4 driver, used to install Tcp4 driver on the ImageHandle.
> -
> -  @param  ImageHandle   The firmware allocated handle for this
> -                        driver image.
> -  @param  SystemTable   Pointer to the EFI system table.
> -
> -  @retval EFI_SUCCESS   Driver loaded.
> -  @retval other         Driver not loaded.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4DriverEntryPoint (
> -  IN EFI_HANDLE        ImageHandle,
> -  IN EFI_SYSTEM_TABLE  *SystemTable
> -  )
> -{
> -  EFI_STATUS  Status;
> -  UINT32      Seed;
> -
> -  //
> -  // Install the TCP4 Driver Binding Protocol
> -  //
> -  Status = EfiLibInstallDriverBindingComponentName2 (
> -             ImageHandle,
> -             SystemTable,
> -             &mTcp4DriverBinding,
> -             ImageHandle,
> -             &gTcp4ComponentName,
> -             &gTcp4ComponentName2
> -             );
> -  ASSERT_EFI_ERROR (Status);
> -  //
> -  // Initialize ISS and random port.
> -  //
> -  Seed            = NetRandomInitSeed ();
> -  mTcpGlobalIss   = NET_RANDOM (Seed) % mTcpGlobalIss;
> -  mTcp4RandomPort = (UINT16) (TCP4_PORT_KNOWN +
> -                    (UINT16) (NET_RANDOM(Seed) % TCP4_PORT_KNOWN));
> -
> -  return Status;
> -}
> -
> -
> -/**
> -  Tests to see if this driver supports a given controller.
> -
> -  If a child device is provided, it further tests to see if this driver supports
> -  creating a handle for the specified child device.
> -
> -  @param  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL
> instance.
> -  @param  ControllerHandle     The handle of the controller to test. This handle
> -                               must support a protocol interface that supplies
> -                               an I/O abstraction to the driver.
> -  @param  RemainingDevicePath  A pointer to the remaining portion of a device
> path.
> -                               This parameter is ignored by device drivers, and is optional for
> bus drivers.
> -
> -
> -  @retval EFI_SUCCESS          The device specified by ControllerHandle and
> -                               RemainingDevicePath is supported by the driver
> -                               specified by This.
> -  @retval EFI_ALREADY_STARTED  The device specified by ControllerHandle and
> -                               RemainingDevicePath is already being managed by
> -                               the driver specified by This.
> -  @retval EFI_ACCESS_DENIED    The device specified by ControllerHandle and
> -                               RemainingDevicePath is already being managed by a
> -                               different driver or an application that requires
> -                               exclusive access.
> -  @retval EFI_UNSUPPORTED      The device specified by ControllerHandle and
> -                               RemainingDevicePath is not supported by the driver
> -                               specified by This.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4DriverBindingSupported (
> -  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> -  IN EFI_HANDLE                   ControllerHandle,
> -  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> -  )
> -{
> -  EFI_STATUS  Status;
> -
> -  //
> -  // Test for the Tcp4ServiceBinding Protocol
> -  //
> -  Status = gBS->OpenProtocol (
> -                  ControllerHandle,
> -                  &gEfiTcp4ServiceBindingProtocolGuid,
> -                  NULL,
> -                  This->DriverBindingHandle,
> -                  ControllerHandle,
> -                  EFI_OPEN_PROTOCOL_TEST_PROTOCOL
> -                  );
> -  if (!EFI_ERROR (Status)) {
> -    return EFI_ALREADY_STARTED;
> -  }
> -
> -  //
> -  // Test for the Ip4 Protocol
> -  //
> -  Status = gBS->OpenProtocol (
> -                  ControllerHandle,
> -                  &gEfiIp4ServiceBindingProtocolGuid,
> -                  NULL,
> -                  This->DriverBindingHandle,
> -                  ControllerHandle,
> -                  EFI_OPEN_PROTOCOL_TEST_PROTOCOL
> -                  );
> -
> -  return Status;
> -}
> -
> -
> -/**
> -  Start this driver on ControllerHandle.
> -
> -  The Start() function is designed to be invoked from the EFI boot service
> -  ConnectController(). As a result, much of the error checking on the parameters
> -  to Start() has been moved into this common boot service. It is legal to call
> -  Start() from other locations, but the following calling restrictions must be
> -  followed or the system behavior will not be deterministic.
> -  1. ControllerHandle must be a valid EFI_HANDLE.
> -  2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally
> -     aligned EFI_DEVICE_PATH_PROTOCOL.
> -  3. Prior to calling Start(), the Supported() function for the driver specified
> -     by This must have been called with the same calling parameters, and
> Supported()
> -     must have returned EFI_SUCCESS.
> -
> -  @param  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL
> instance.
> -  @param  ControllerHandle     The handle of the controller to start. This handle
> -                               must support a protocol interface that supplies
> -                               an I/O abstraction to the driver.
> -  @param  RemainingDevicePath  A pointer to the remaining portion of a device
> path.
> -                               This parameter is ignored by device drivers, and is
> -                               optional for bus drivers.
> -
> -  @retval EFI_SUCCESS          The device was started.
> -  @retval EFI_ALREADY_STARTED  The device could not be started due to a
> device error.
> -  @retval EFI_OUT_OF_RESOURCES The request could not be completed due to
> a lack
> -                               of resources.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4DriverBindingStart (
> -  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> -  IN EFI_HANDLE                   ControllerHandle,
> -  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> -  )
> -{
> -  EFI_STATUS               Status;
> -  TCP4_SERVICE_DATA        *TcpServiceData;
> -  IP_IO_OPEN_DATA          OpenData;
> -
> -  TcpServiceData = AllocateZeroPool (sizeof (TCP4_SERVICE_DATA));
> -
> -  if (NULL == TcpServiceData) {
> -    DEBUG ((EFI_D_ERROR, "Tcp4DriverBindingStart: Have no enough"
> -      " resource to create a Tcp Servcie Data\n"));
> -
> -    return EFI_OUT_OF_RESOURCES;
> -  }
> -
> -  //
> -  // Create a new IP IO to Consume it
> -  //
> -  TcpServiceData->IpIo = IpIoCreate (
> -                           This->DriverBindingHandle,
> -                           ControllerHandle,
> -                           IP_VERSION_4
> -                           );
> -  if (NULL == TcpServiceData->IpIo) {
> -
> -    DEBUG ((EFI_D_ERROR, "Tcp4DriverBindingStart: Have no enough"
> -      " resource to create an Ip Io\n"));
> -
> -    Status = EFI_OUT_OF_RESOURCES;
> -    goto ON_ERROR;
> -  }
> -
> -  //
> -  // Configure and start IpIo.
> -  //
> -  ZeroMem (&OpenData, sizeof (IP_IO_OPEN_DATA));
> -
> -  CopyMem (
> -    &OpenData.IpConfigData.Ip4CfgData,
> -    &mIp4IoDefaultIpConfigData,
> -    sizeof (EFI_IP4_CONFIG_DATA)
> -    );
> -
> -  OpenData.IpConfigData.Ip4CfgData.DefaultProtocol = EFI_IP_PROTO_TCP;
> -
> -  OpenData.PktRcvdNotify = Tcp4RxCallback;
> -  Status                 = IpIoOpen (TcpServiceData->IpIo, &OpenData);
> -
> -  if (EFI_ERROR (Status)) {
> -    goto ON_ERROR;
> -  }
> -
> -  //
> -  // Create the timer event used by TCP driver
> -  //
> -  Status = Tcp4CreateTimer ();
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "Tcp4DriverBindingStart: Create TcpTimer"
> -      " Event failed with %r\n", Status));
> -
> -    goto ON_ERROR;
> -  }
> -
> -  //
> -  // Install the Tcp4ServiceBinding Protocol on the
> -  // controller handle
> -  //
> -  TcpServiceData->Tcp4ServiceBinding = mTcp4ServiceBinding;
> -
> -  Status = gBS->InstallMultipleProtocolInterfaces (
> -                  &ControllerHandle,
> -                  &gEfiTcp4ServiceBindingProtocolGuid,
> -                  &TcpServiceData->Tcp4ServiceBinding,
> -                  NULL
> -                  );
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "Tcp4DriverBindingStart: Install Tcp4 Service Binding"
> -      " Protocol failed for %r\n", Status));
> -
> -    Tcp4DestroyTimer ();
> -    goto ON_ERROR;
> -  }
> -
> -  //
> -  // Initialize member in TcpServiceData
> -  //
> -  TcpServiceData->ControllerHandle    = ControllerHandle;
> -  TcpServiceData->Signature           = TCP4_DRIVER_SIGNATURE;
> -  TcpServiceData->DriverBindingHandle = This->DriverBindingHandle;
> -
> -  InitializeListHead (&TcpServiceData->SocketList);
> -
> -  return EFI_SUCCESS;
> -
> -ON_ERROR:
> -
> -  if (TcpServiceData->IpIo != NULL) {
> -    IpIoDestroy (TcpServiceData->IpIo);
> -    TcpServiceData->IpIo = NULL;
> -  }
> -
> -  FreePool (TcpServiceData);
> -
> -  return Status;
> -}
> -
> -
> -/**
> -  Stop this driver on ControllerHandle.
> -
> -  The Stop() function is designed to be invoked from the EFI boot service
> -  DisconnectController(). As a result, much of the error checking on the
> parameters
> -  to Stop() has been moved into this common boot service. It is legal to call
> Stop()
> -  from other locations, but the following calling restrictions must be followed
> -  or the system behavior will not be deterministic.
> -  1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous
> call
> -     to this same driver's Start() function.
> -  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
> -     EFI_HANDLE. In addition, all of these handles must have been created in this
> -     driver's Start() function, and the Start() function must have called
> OpenProtocol()
> -     on ControllerHandle with an Attribute of
> EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
> -
> -  @param  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL
> instance.
> -  @param  ControllerHandle  A handle to the device being stopped. The handle
> must
> -                            support a bus specific I/O protocol for the driver
> -                            to use to stop the device.
> -  @param  NumberOfChildren  The number of child device handles in
> ChildHandleBuffer.
> -  @param  ChildHandleBuffer An array of child handles to be freed. May be
> NULL if
> -                            NumberOfChildren is 0.
> -
> -  @retval EFI_SUCCESS       The device was stopped.
> -  @retval EFI_DEVICE_ERROR  The device could not be stopped due to a device
> error.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4DriverBindingStop (
> -  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,
> -  IN  EFI_HANDLE                   ControllerHandle,
> -  IN  UINTN                        NumberOfChildren,
> -  IN  EFI_HANDLE                   *ChildHandleBuffer
> -  )
> -{
> -  EFI_STATUS                                Status;
> -  EFI_HANDLE                                NicHandle;
> -  EFI_SERVICE_BINDING_PROTOCOL              *ServiceBinding;
> -  TCP4_SERVICE_DATA                         *TcpServiceData;
> -  LIST_ENTRY                                *List;
> -  TCP4_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT  Context;
> -
> -  // Find the NicHandle where Tcp4 ServiceBinding Protocol is installed.
> -  //
> -  NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiIp4ProtocolGuid);
> -  if (NicHandle == NULL) {
> -    return EFI_SUCCESS;
> -  }
> -
> -  //
> -  // Retrieve the TCP driver Data Structure
> -  //
> -  Status = gBS->OpenProtocol (
> -                  NicHandle,
> -                  &gEfiTcp4ServiceBindingProtocolGuid,
> -                  (VOID **) &ServiceBinding,
> -                  This->DriverBindingHandle,
> -                  ControllerHandle,
> -                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
> -                  );
> -  if (EFI_ERROR (Status)) {
> -
> -    DEBUG ((EFI_D_ERROR, "Tcp4DriverBindingStop: Locate Tcp4 Service "
> -      " Binding Protocol failed with %r\n", Status));
> -
> -    return EFI_DEVICE_ERROR;
> -  }
> -
> -  TcpServiceData = TCP4_FROM_THIS (ServiceBinding);
> -
> -  if (NumberOfChildren != 0) {
> -    List = &TcpServiceData->SocketList;
> -    Context.ServiceBinding = ServiceBinding;
> -    Context.NumberOfChildren = NumberOfChildren;
> -    Context.ChildHandleBuffer = ChildHandleBuffer;
> -    Status = NetDestroyLinkList (
> -               List,
> -               Tcp4DestroyChildEntryInHandleBuffer,
> -               &Context,
> -               NULL
> -               );
> -  } else if (IsListEmpty (&TcpServiceData->SocketList)) {
> -    //
> -    // Uninstall TCP servicebinding protocol
> -    //
> -    gBS->UninstallMultipleProtocolInterfaces (
> -           NicHandle,
> -           &gEfiTcp4ServiceBindingProtocolGuid,
> -           ServiceBinding,
> -           NULL
> -           );
> -
> -    //
> -    // Destroy the IpIO consumed by TCP driver
> -    //
> -    IpIoDestroy (TcpServiceData->IpIo);
> -    TcpServiceData->IpIo = NULL;
> -
> -    //
> -    // Destroy the heartbeat timer.
> -    //
> -    Tcp4DestroyTimer ();
> -
> -    if (gTcpControllerNameTable != NULL) {
> -      FreeUnicodeStringTable (gTcpControllerNameTable);
> -      gTcpControllerNameTable = NULL;
> -    }
> -
> -    //
> -    // Release the TCP service data
> -    //
> -    FreePool (TcpServiceData);
> -
> -    Status = EFI_SUCCESS;
> -  }
> -
> -  return Status;
> -}
> -
> -/**
> -  Open Ip4 and device path protocols for a created socket, and insert it in
> -  socket list.
> -
> -  @param  This                Pointer to the socket just created
> -  @param  Context             Context of the socket
> -
> -  @retval EFI_SUCCESS         This protocol is installed successfully.
> -  @retval other               Some error occured.
> -
> -**/
> -EFI_STATUS
> -Tcp4CreateSocketCallback (
> -  IN SOCKET  *This,
> -  IN VOID    *Context
> -  )
> -{
> -  EFI_STATUS         Status;
> -  TCP4_SERVICE_DATA  *TcpServiceData;
> -  EFI_IP4_PROTOCOL   *Ip4;
> -
> -  TcpServiceData = ((TCP4_PROTO_DATA *) This->ProtoReserved)->TcpService;
> -
> -  //
> -  // Open the default Ip4 protocol of IP_IO BY_DRIVER.
> -  //
> -  Status = gBS->OpenProtocol (
> -                  TcpServiceData->IpIo->ChildHandle,
> -                  &gEfiIp4ProtocolGuid,
> -                  (VOID **) &Ip4,
> -                  TcpServiceData->DriverBindingHandle,
> -                  This->SockHandle,
> -                  EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
> -                  );
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  //
> -  // Open the device path on the handle where service binding resides on.
> -  //
> -  Status = gBS->OpenProtocol (
> -                  TcpServiceData->ControllerHandle,
> -                  &gEfiDevicePathProtocolGuid,
> -                  (VOID **) &This->ParentDevicePath,
> -                  TcpServiceData->DriverBindingHandle,
> -                  This->SockHandle,
> -                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
> -                  );
> -  if (EFI_ERROR (Status)) {
> -    gBS->CloseProtocol (
> -           TcpServiceData->IpIo->ChildHandle,
> -           &gEfiIp4ProtocolGuid,
> -           TcpServiceData->DriverBindingHandle,
> -           This->SockHandle
> -           );
> -  } else {
> -    //
> -    // Insert this socket into the SocketList.
> -    //
> -    InsertTailList (&TcpServiceData->SocketList, &This->Link);
> -  }
> -
> -  return Status;
> -}
> -
> -/**
> -  Close Ip4 and device path protocols for a socket, and remove it from socket
> list.
> -
> -  @param  This                Pointer to the socket to be removed
> -  @param  Context             Context of the socket
> -
> -**/
> -VOID
> -Tcp4DestroySocketCallback (
> -  IN SOCKET  *This,
> -  IN VOID    *Context
> -  )
> -{
> -  TCP4_SERVICE_DATA  *TcpServiceData;
> -
> -  TcpServiceData = ((TCP4_PROTO_DATA *) This->ProtoReserved)->TcpService;
> -
> -  //
> -  // Remove this node from the list.
> -  //
> -  RemoveEntryList (&This->Link);
> -
> -  //
> -  // Close the Ip4 protocol.
> -  //
> -  gBS->CloseProtocol (
> -         TcpServiceData->IpIo->ChildHandle,
> -         &gEfiIp4ProtocolGuid,
> -         TcpServiceData->DriverBindingHandle,
> -         This->SockHandle
> -         );
> -}
> -
> -/**
> -  Creates a child handle and installs a protocol.
> -
> -  The CreateChild() function installs a protocol on ChildHandle. If ChildHandle
> -  is a pointer to NULL, then a new handle is created and returned in ChildHandle.
> -  If ChildHandle is not a pointer to NULL, then the protocol installs on the
> existing
> -  ChildHandle.
> -
> -  @param  This        Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
> -  @param  ChildHandle Pointer to the handle of the child to create. If it is NULL,
> then
> -                      a new handle is created. If it is a pointer to an existing UEFI
> -                      handle, then the protocol is added to the existing UEFI handle.
> -
> -  @retval EFI_SUCCES            The protocol was added to ChildHandle.
> -  @retval EFI_INVALID_PARAMETER ChildHandle is NULL.
> -  @retval EFI_OUT_OF_RESOURCES  There are not enough resources available
> to create
> -                                the child.
> -  @retval other                 The child handle was not created.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4ServiceBindingCreateChild (
> -  IN     EFI_SERVICE_BINDING_PROTOCOL  *This,
> -  IN OUT EFI_HANDLE                    *ChildHandle
> -  )
> -{
> -  SOCKET            *Sock;
> -  TCP4_SERVICE_DATA *TcpServiceData;
> -  TCP4_PROTO_DATA   TcpProto;
> -  EFI_STATUS        Status;
> -  EFI_TPL           OldTpl;
> -
> -  if (NULL == This || NULL == ChildHandle) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  OldTpl              = gBS->RaiseTPL (TPL_CALLBACK);
> -  Status              = EFI_SUCCESS;
> -  TcpServiceData      = TCP4_FROM_THIS (This);
> -  TcpProto.TcpService = TcpServiceData;
> -  TcpProto.TcpPcb     = NULL;
> -
> -  //
> -  // Create a tcp instance with defualt Tcp default
> -  // sock init data and TcpProto
> -  //
> -  mTcp4DefaultSockData.ProtoData     = &TcpProto;
> -  mTcp4DefaultSockData.DataSize      = sizeof (TCP4_PROTO_DATA);
> -  mTcp4DefaultSockData.DriverBinding = TcpServiceData->DriverBindingHandle;
> -
> -  Sock = SockCreateChild (&mTcp4DefaultSockData);
> -  if (NULL == Sock) {
> -    DEBUG ((EFI_D_ERROR, "Tcp4DriverBindingCreateChild: "
> -      "No resource to create a Tcp Child\n"));
> -
> -    Status = EFI_OUT_OF_RESOURCES;
> -  } else {
> -    *ChildHandle = Sock->SockHandle;
> -  }
> -
> -  mTcp4DefaultSockData.ProtoData = NULL;
> -
> -  gBS->RestoreTPL (OldTpl);
> -  return Status;
> -}
> -
> -
> -/**
> -  Destroys a child handle with a protocol installed on it.
> -
> -  The DestroyChild() function does the opposite of CreateChild(). It removes a
> protocol
> -  that was installed by CreateChild() from ChildHandle. If the removed protocol
> is the
> -  last protocol on ChildHandle, then ChildHandle is destroyed.
> -
> -  @param  This         Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
> -  @param  ChildHandle  Handle of the child to destroy
> -
> -  @retval EFI_SUCCES            The protocol was removed from ChildHandle.
> -  @retval EFI_UNSUPPORTED       ChildHandle does not support the protocol
> that is
> -                                being removed.
> -  @retval EFI_INVALID_PARAMETER Child handle is NULL.
> -  @retval EFI_ACCESS_DENIED     The protocol could not be removed from the
> ChildHandle
> -                                because its services are being used.
> -  @retval other                 The child handle was not destroyed.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4ServiceBindingDestroyChild (
> -  IN EFI_SERVICE_BINDING_PROTOCOL  *This,
> -  IN EFI_HANDLE                    ChildHandle
> -  )
> -{
> -  EFI_STATUS         Status;
> -  EFI_TCP4_PROTOCOL  *Tcp4;
> -  SOCKET             *Sock;
> -
> -  if (NULL == This || NULL == ChildHandle) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  //
> -  // retrieve the Tcp4 protocol from ChildHandle
> -  //
> -  Status = gBS->OpenProtocol (
> -                  ChildHandle,
> -                  &gEfiTcp4ProtocolGuid,
> -                  (VOID **) &Tcp4,
> -                  mTcp4DriverBinding.DriverBindingHandle,
> -                  ChildHandle,
> -                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
> -                  );
> -  if (EFI_ERROR (Status)) {
> -    Status = EFI_UNSUPPORTED;
> -  } else {
> -    //
> -    // destroy this sock and related Tcp protocol control
> -    // block
> -    //
> -    Sock = SOCK_FROM_THIS (Tcp4);
> -
> -    SockDestroyChild (Sock);
> -  }
> -
> -  return Status;
> -}
> -
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Input.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Input.c
> deleted file mode 100644
> index f48efdac7cd8..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Input.c
> +++ /dev/null
> @@ -1,1497 +0,0 @@
> -/** @file
> -  TCP input process routines.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -
> -#include "Tcp4Main.h"
> -
> -
> -/**
> -  Check whether the sequence number of the incoming segment is acceptable.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Seg      Pointer to the incoming segment.
> -
> -  @retval 1       The sequence number is acceptable.
> -  @retval 0       The sequence number is not acceptable.
> -
> -**/
> -INTN
> -TcpSeqAcceptable (
> -  IN TCP_CB  *Tcb,
> -  IN TCP_SEG *Seg
> -  )
> -{
> -  return (TCP_SEQ_LEQ (Tcb->RcvNxt, Seg->End) &&
> -          TCP_SEQ_LT (Seg->Seq, Tcb->RcvWl2 + Tcb->RcvWnd));
> -}
> -
> -
> -/**
> -  NewReno fast recovery, RFC3782.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Seg      Segment that triggers the fast recovery.
> -
> -**/
> -VOID
> -TcpFastRecover (
> -  IN OUT TCP_CB  *Tcb,
> -  IN     TCP_SEG *Seg
> -  )
> -{
> -  UINT32  FlightSize;
> -  UINT32  Acked;
> -
> -  //
> -  // Step 1: Three duplicate ACKs and not in fast recovery
> -  //
> -  if (Tcb->CongestState != TCP_CONGEST_RECOVER) {
> -
> -    //
> -    // Step 1A: Invoking fast retransmission.
> -    //
> -    FlightSize        = TCP_SUB_SEQ (Tcb->SndNxt, Tcb->SndUna);
> -
> -    Tcb->Ssthresh     = MAX (FlightSize >> 1, (UINT32) (2 * Tcb->SndMss));
> -    Tcb->Recover      = Tcb->SndNxt;
> -
> -    Tcb->CongestState = TCP_CONGEST_RECOVER;
> -    TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_RTT_ON);
> -
> -    //
> -    // Step 2: Entering fast retransmission
> -    //
> -    TcpRetransmit (Tcb, Tcb->SndUna);
> -    Tcb->CWnd = Tcb->Ssthresh + 3 * Tcb->SndMss;
> -
> -    DEBUG ((EFI_D_NET, "TcpFastRecover: enter fast retransmission"
> -      " for TCB %p, recover point is %d\n", Tcb, Tcb->Recover));
> -    return;
> -  }
> -
> -  //
> -  // During fast recovery, execute Step 3, 4, 5 of RFC3782
> -  //
> -  if (Seg->Ack == Tcb->SndUna) {
> -
> -    //
> -    // Step 3: Fast Recovery,
> -    // If this is a duplicated ACK, increse Cwnd by SMSS.
> -    //
> -
> -    // Step 4 is skipped here only to be executed later
> -    // by TcpToSendData
> -    //
> -    Tcb->CWnd += Tcb->SndMss;
> -    DEBUG ((EFI_D_NET, "TcpFastRecover: received another"
> -      " duplicated ACK (%d) for TCB %p\n", Seg->Ack, Tcb));
> -
> -  } else {
> -
> -    //
> -    // New data is ACKed, check whether it is a
> -    // full ACK or partial ACK
> -    //
> -    if (TCP_SEQ_GEQ (Seg->Ack, Tcb->Recover)) {
> -
> -      //
> -      // Step 5 - Full ACK:
> -      // deflate the congestion window, and exit fast recovery
> -      //
> -      FlightSize        = TCP_SUB_SEQ (Tcb->SndNxt, Tcb->SndUna);
> -
> -      Tcb->CWnd         = MIN (Tcb->Ssthresh, FlightSize + Tcb->SndMss);
> -
> -      Tcb->CongestState = TCP_CONGEST_OPEN;
> -      DEBUG ((EFI_D_NET, "TcpFastRecover: received a full ACK(%d)"
> -        " for TCB %p, exit fast recovery\n", Seg->Ack, Tcb));
> -
> -    } else {
> -
> -      //
> -      // Step 5 - Partial ACK:
> -      // fast retransmit the first unacknowledge field
> -      // , then deflate the CWnd
> -      //
> -      TcpRetransmit (Tcb, Seg->Ack);
> -      Acked = TCP_SUB_SEQ (Seg->Ack, Tcb->SndUna);
> -
> -      //
> -      // Deflate the CWnd by the amount of new data
> -      // ACKed by SEG.ACK. If more than one SMSS data
> -      // is ACKed, add back SMSS byte to CWnd after
> -      //
> -      if (Acked >= Tcb->SndMss) {
> -        Acked -= Tcb->SndMss;
> -
> -      }
> -
> -      Tcb->CWnd -= Acked;
> -
> -      DEBUG ((EFI_D_NET, "TcpFastRecover: received a partial"
> -        " ACK(%d) for TCB %p\n", Seg->Ack, Tcb));
> -
> -    }
> -  }
> -}
> -
> -
> -/**
> -  NewReno fast loss recovery, RFC3792.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Seg      Segment that triggers the fast loss recovery.
> -
> -**/
> -VOID
> -TcpFastLossRecover (
> -  IN OUT TCP_CB  *Tcb,
> -  IN     TCP_SEG *Seg
> -  )
> -{
> -  if (TCP_SEQ_GT (Seg->Ack, Tcb->SndUna)) {
> -
> -    //
> -    // New data is ACKed, check whether it is a
> -    // full ACK or partial ACK
> -    //
> -    if (TCP_SEQ_GEQ (Seg->Ack, Tcb->LossRecover)) {
> -
> -      //
> -      // Full ACK: exit the loss recovery.
> -      //
> -      Tcb->LossTimes    = 0;
> -      Tcb->CongestState = TCP_CONGEST_OPEN;
> -
> -      DEBUG ((EFI_D_NET, "TcpFastLossRecover: received a "
> -        "full ACK(%d) for TCB %p\n", Seg->Ack, Tcb));
> -
> -    } else {
> -
> -      //
> -      // Partial ACK:
> -      // fast retransmit the first unacknowledge field.
> -      //
> -      TcpRetransmit (Tcb, Seg->Ack);
> -      DEBUG ((EFI_D_NET, "TcpFastLossRecover: received a "
> -        "partial ACK(%d) for TCB %p\n", Seg->Ack, Tcb));
> -    }
> -  }
> -}
> -
> -
> -/**
> -  Compute the RTT as specified in RFC2988.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Measure  Currently measured RTT in heart beats.
> -
> -**/
> -VOID
> -TcpComputeRtt (
> -  IN OUT TCP_CB *Tcb,
> -  IN     UINT32 Measure
> -  )
> -{
> -  INT32 Var;
> -
> -  //
> -  // Step 2.3: Compute the RTO for subsequent RTT measurement.
> -  //
> -  if (Tcb->SRtt != 0) {
> -
> -    Var = Tcb->SRtt - (Measure << TCP_RTT_SHIFT);
> -
> -    if (Var < 0) {
> -      Var = -Var;
> -    }
> -
> -    Tcb->RttVar = (3 * Tcb->RttVar + Var) >> 2;
> -    Tcb->SRtt   = 7 * (Tcb->SRtt >> 3) + Measure;
> -
> -  } else {
> -    //
> -    // Step 2.2: compute the first RTT measure
> -    //
> -    Tcb->SRtt   = Measure << TCP_RTT_SHIFT;
> -    Tcb->RttVar = Measure << (TCP_RTT_SHIFT - 1);
> -  }
> -
> -  Tcb->Rto = (Tcb->SRtt + MAX (8, 4 * Tcb->RttVar)) >> TCP_RTT_SHIFT;
> -
> -  //
> -  // Step 2.4: Limit the RTO to at least 1 second
> -  // Step 2.5: Limit the RTO to a maxium value that
> -  // is at least 60 second
> -  //
> -  if (Tcb->Rto < TCP_RTO_MIN) {
> -    Tcb->Rto = TCP_RTO_MIN;
> -
> -  } else if (Tcb->Rto > TCP_RTO_MAX) {
> -    Tcb->Rto = TCP_RTO_MAX;
> -
> -  }
> -
> -  DEBUG ((EFI_D_NET, "TcpComputeRtt: new RTT for TCB %p"
> -    " computed SRTT: %d RTTVAR: %d RTO: %d\n",
> -    Tcb, Tcb->SRtt, Tcb->RttVar, Tcb->Rto));
> -
> -}
> -
> -
> -/**
> -  Trim the data, SYN and FIN to fit into the window defined by Left and Right.
> -
> -  @param  Nbuf     Buffer that contains received TCP segment without IP header.
> -  @param  Left     The sequence number of the window's left edge.
> -  @param  Right    The sequence number of the window's right edge.
> -
> -**/
> -VOID
> -TcpTrimSegment (
> -  IN NET_BUF   *Nbuf,
> -  IN TCP_SEQNO Left,
> -  IN TCP_SEQNO Right
> -  )
> -{
> -  TCP_SEG   *Seg;
> -  TCP_SEQNO Urg;
> -  UINT32    Drop;
> -
> -  Seg = TCPSEG_NETBUF (Nbuf);
> -
> -  //
> -  // If the segment is completely out of window,
> -  // truncate every thing, include SYN and FIN.
> -  //
> -  if (TCP_SEQ_LEQ (Seg->End, Left) || TCP_SEQ_LEQ (Right, Seg->Seq)) {
> -
> -    TCP_CLEAR_FLG (Seg->Flag, TCP_FLG_SYN);
> -    TCP_CLEAR_FLG (Seg->Flag, TCP_FLG_FIN);
> -
> -    Seg->Seq = Seg->End;
> -    NetbufTrim (Nbuf, Nbuf->TotalSize, NET_BUF_HEAD);
> -    return;
> -  }
> -
> -  //
> -  // Adjust the buffer header
> -  //
> -  if (TCP_SEQ_LT (Seg->Seq, Left)) {
> -
> -    Drop      = TCP_SUB_SEQ (Left, Seg->Seq);
> -    Urg       = Seg->Seq + Seg->Urg;
> -    Seg->Seq  = Left;
> -
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN)) {
> -      TCP_CLEAR_FLG (Seg->Flag, TCP_FLG_SYN);
> -      Drop--;
> -    }
> -
> -    //
> -    // Adjust the urgent point
> -    //
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_URG)) {
> -
> -      if (TCP_SEQ_LT (Urg, Seg->Seq)) {
> -
> -        TCP_CLEAR_FLG (Seg->Flag, TCP_FLG_URG);
> -      } else {
> -        Seg->Urg = (UINT16) TCP_SUB_SEQ (Urg, Seg->Seq);
> -      }
> -    }
> -
> -    if (Drop != 0) {
> -      NetbufTrim (Nbuf, Drop, NET_BUF_HEAD);
> -    }
> -  }
> -
> -  //
> -  // Adjust the buffer tail
> -  //
> -  if (TCP_SEQ_GT (Seg->End, Right)) {
> -
> -    Drop      = TCP_SUB_SEQ (Seg->End, Right);
> -    Seg->End  = Right;
> -
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_FIN)) {
> -      TCP_CLEAR_FLG (Seg->Flag, TCP_FLG_FIN);
> -      Drop--;
> -    }
> -
> -    if (Drop != 0) {
> -      NetbufTrim (Nbuf, Drop, NET_BUF_TAIL);
> -    }
> -  }
> -
> -  ASSERT (TcpVerifySegment (Nbuf) != 0);
> -}
> -
> -
> -/**
> -  Trim off the data outside the tcb's receive window.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf     Pointer to the NET_BUF containing the received tcp segment.
> -
> -**/
> -VOID
> -TcpTrimInWnd (
> -  IN TCP_CB  *Tcb,
> -  IN NET_BUF *Nbuf
> -  )
> -{
> -  TcpTrimSegment (Nbuf, Tcb->RcvNxt, Tcb->RcvWl2 + Tcb->RcvWnd);
> -}
> -
> -
> -/**
> -  Process the data and FIN flag, check whether to deliver
> -  data to the socket layer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -  @retval 0        No error occurred to deliver data.
> -  @retval -1       Error condition occurred. Proper response is to reset the
> -                   connection.
> -
> -**/
> -INTN
> -TcpDeliverData (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  LIST_ENTRY      *Entry;
> -  NET_BUF         *Nbuf;
> -  TCP_SEQNO       Seq;
> -  TCP_SEG         *Seg;
> -  UINT32          Urgent;
> -
> -  ASSERT ((Tcb != NULL) && (Tcb->Sk != NULL));
> -
> -  //
> -  // make sure there is some data queued,
> -  // and TCP is in a proper state
> -  //
> -  if (IsListEmpty (&Tcb->RcvQue) || !TCP_CONNECTED (Tcb->State)) {
> -
> -    return 0;
> -  }
> -
> -  //
> -  // Deliver data to the socket layer
> -  //
> -  Entry = Tcb->RcvQue.ForwardLink;
> -  Seq   = Tcb->RcvNxt;
> -
> -  while (Entry != &Tcb->RcvQue) {
> -    Nbuf  = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);
> -    Seg   = TCPSEG_NETBUF (Nbuf);
> -
> -    ASSERT (TcpVerifySegment (Nbuf) != 0);
> -    ASSERT (Nbuf->Tcp == NULL);
> -
> -    if (TCP_SEQ_GT (Seg->Seq, Seq)) {
> -      break;
> -    }
> -
> -    Entry       = Entry->ForwardLink;
> -    Seq         = Seg->End;
> -    Tcb->RcvNxt = Seq;
> -
> -    RemoveEntryList (&Nbuf->List);
> -
> -    //
> -    // RFC793 Eighth step: process FIN in sequence
> -    //
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_FIN)) {
> -
> -      //
> -      // The peer sends to us junky data after FIN,
> -      // reset the connection.
> -      //
> -      if (!IsListEmpty (&Tcb->RcvQue)) {
> -        DEBUG ((EFI_D_ERROR, "TcpDeliverData: data received after"
> -          " FIN from peer of TCB %p, reset connection\n", Tcb));
> -
> -        NetbufFree (Nbuf);
> -        return -1;
> -      }
> -
> -      DEBUG ((EFI_D_NET, "TcpDeliverData: processing FIN "
> -        "from peer of TCB %p\n", Tcb));
> -
> -      switch (Tcb->State) {
> -      case TCP_SYN_RCVD:
> -      case TCP_ESTABLISHED:
> -
> -        TcpSetState (Tcb, TCP_CLOSE_WAIT);
> -        break;
> -
> -      case TCP_FIN_WAIT_1:
> -
> -        if (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_FIN_ACKED)) {
> -
> -          TcpSetState (Tcb, TCP_CLOSING);
> -          break;
> -        }
> -
> -      //
> -      // fall through
> -      //
> -      case TCP_FIN_WAIT_2:
> -
> -        TcpSetState (Tcb, TCP_TIME_WAIT);
> -        TcpClearAllTimer (Tcb);
> -
> -        if (Tcb->TimeWaitTimeout != 0) {
> -
> -          TcpSetTimer (Tcb, TCP_TIMER_2MSL, Tcb->TimeWaitTimeout);
> -        } else {
> -
> -          DEBUG ((EFI_D_WARN, "Connection closed immediately "
> -            "because app disables TIME_WAIT timer for %p\n", Tcb));
> -
> -          TcpSendAck (Tcb);
> -          TcpClose (Tcb);
> -        }
> -        break;
> -
> -      case TCP_CLOSE_WAIT:
> -      case TCP_CLOSING:
> -      case TCP_LAST_ACK:
> -      case TCP_TIME_WAIT:
> -        //
> -        // The peer sends to us junk FIN byte. Discard
> -        // the buffer then reset the connection
> -        //
> -        NetbufFree (Nbuf);
> -        return -1;
> -      default:
> -        break;
> -      }
> -
> -      TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW);
> -
> -      Seg->End--;
> -    }
> -
> -    //
> -    // Don't delay the ack if PUSH flag is on.
> -    //
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_PSH)) {
> -
> -      TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW);
> -    }
> -
> -    if (Nbuf->TotalSize != 0) {
> -      Urgent = 0;
> -
> -      if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RCVD_URG) &&
> -          TCP_SEQ_LEQ (Seg->Seq, Tcb->RcvUp)) {
> -
> -        if (TCP_SEQ_LEQ (Seg->End, Tcb->RcvUp)) {
> -          Urgent = Nbuf->TotalSize;
> -        } else {
> -          Urgent = TCP_SUB_SEQ (Tcb->RcvUp, Seg->Seq) + 1;
> -        }
> -      }
> -
> -      SockDataRcvd (Tcb->Sk, Nbuf, Urgent);
> -    }
> -
> -    if (TCP_FIN_RCVD (Tcb->State)) {
> -
> -      SockNoMoreData (Tcb->Sk);
> -    }
> -
> -    NetbufFree (Nbuf);
> -  }
> -
> -  return 0;
> -}
> -
> -
> -/**
> -  Store the data into the reassemble queue.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf     Pointer to the buffer containing the data to be queued.
> -
> -**/
> -VOID
> -TcpQueueData (
> -  IN OUT TCP_CB  *Tcb,
> -  IN     NET_BUF *Nbuf
> -  )
> -{
> -  TCP_SEG         *Seg;
> -  LIST_ENTRY      *Head;
> -  LIST_ENTRY      *Prev;
> -  LIST_ENTRY      *Cur;
> -  NET_BUF         *Node;
> -
> -  ASSERT ((Tcb != NULL) && (Nbuf != NULL) && (Nbuf->Tcp == NULL));
> -
> -  NET_GET_REF (Nbuf);
> -
> -  Seg   = TCPSEG_NETBUF (Nbuf);
> -  Head  = &Tcb->RcvQue;
> -
> -  //
> -  // Fast path to process normal case. That is,
> -  // no out-of-order segments are received.
> -  //
> -  if (IsListEmpty (Head)) {
> -
> -    InsertTailList (Head, &Nbuf->List);
> -    return;
> -  }
> -
> -  //
> -  // Find the point to insert the buffer
> -  //
> -  for (Prev = Head, Cur = Head->ForwardLink;
> -       Cur != Head;
> -       Prev = Cur, Cur = Cur->ForwardLink) {
> -
> -    Node = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);
> -
> -    if (TCP_SEQ_LT (Seg->Seq, TCPSEG_NETBUF (Node)->Seq)) {
> -      break;
> -    }
> -  }
> -
> -  //
> -  // Check whether the current segment overlaps with the
> -  // previous segment.
> -  //
> -  if (Prev != Head) {
> -    Node = NET_LIST_USER_STRUCT (Prev, NET_BUF, List);
> -
> -    if (TCP_SEQ_LT (Seg->Seq, TCPSEG_NETBUF (Node)->End)) {
> -
> -      if (TCP_SEQ_LEQ (Seg->End, TCPSEG_NETBUF (Node)->End)) {
> -
> -        NetbufFree (Nbuf);
> -        return;
> -      }
> -
> -      TcpTrimSegment (Nbuf, TCPSEG_NETBUF (Node)->End, Seg->End);
> -    }
> -  }
> -
> -  InsertHeadList (Prev, &Nbuf->List);
> -
> -  TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW);
> -
> -  //
> -  // Check the segments after the insert point.
> -  //
> -  while (Cur != Head) {
> -    Node = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);
> -
> -    if (TCP_SEQ_LEQ (TCPSEG_NETBUF (Node)->End, Seg->End)) {
> -
> -      Cur = Cur->ForwardLink;
> -
> -      RemoveEntryList (&Node->List);
> -      NetbufFree (Node);
> -      continue;
> -    }
> -
> -    if (TCP_SEQ_LT (TCPSEG_NETBUF (Node)->Seq, Seg->End)) {
> -
> -      if (TCP_SEQ_LEQ (TCPSEG_NETBUF (Node)->Seq, Seg->Seq)) {
> -
> -        RemoveEntryList (&Nbuf->List);
> -        NetbufFree (Nbuf);
> -        return ;
> -      }
> -
> -      TcpTrimSegment (Nbuf, Seg->Seq, TCPSEG_NETBUF (Node)->Seq);
> -      break;
> -    }
> -
> -    Cur = Cur->ForwardLink;
> -  }
> -}
> -
> -
> -/**
> -  Ajust the send queue or the retransmit queue.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Ack      The acknowledge seuqence number of the received segment.
> -
> -**/
> -VOID
> -TcpAdjustSndQue (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_SEQNO Ack
> -  )
> -{
> -  LIST_ENTRY      *Head;
> -  LIST_ENTRY      *Cur;
> -  NET_BUF         *Node;
> -  TCP_SEG         *Seg;
> -
> -  Head  = &Tcb->SndQue;
> -  Cur   = Head->ForwardLink;
> -
> -  while (Cur != Head) {
> -    Node  = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);
> -    Seg   = TCPSEG_NETBUF (Node);
> -
> -    if (TCP_SEQ_GEQ (Seg->Seq, Ack)) {
> -      break;
> -    }
> -
> -    //
> -    // Remove completely ACKed segments
> -    //
> -    if (TCP_SEQ_LEQ (Seg->End, Ack)) {
> -      Cur = Cur->ForwardLink;
> -
> -      RemoveEntryList (&Node->List);
> -      NetbufFree (Node);
> -      continue;
> -    }
> -
> -    TcpTrimSegment (Node, Ack, Seg->End);
> -    break;
> -  }
> -}
> -
> -
> -/**
> -  Process the received TCP segments.
> -
> -  @param  Nbuf     Buffer that contains received TCP segment without IP header.
> -  @param  Src      Source address of the segment, or the peer's IP address.
> -  @param  Dst      Destination address of the segment, or the local end's IP
> -                   address.
> -
> -  @retval 0        Segment is processed successfully. It is either accepted or
> -                   discarded. But no connection is reset by the segment.
> -  @retval -1       A connection is reset by the segment.
> -
> -**/
> -INTN
> -TcpInput (
> -  IN NET_BUF *Nbuf,
> -  IN UINT32  Src,
> -  IN UINT32  Dst
> -  )
> -{
> -  TCP_CB      *Tcb;
> -  TCP_CB      *Parent;
> -  TCP_OPTION  Option;
> -  TCP_HEAD    *Head;
> -  INT32       Len;
> -  TCP_SEG     *Seg;
> -  TCP_SEQNO   Right;
> -  TCP_SEQNO   Urg;
> -  INT32       Usable;
> -
> -  NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);
> -
> -  Parent  = NULL;
> -  Tcb     = NULL;
> -
> -  Head    = (TCP_HEAD *) NetbufGetByte (Nbuf, 0, NULL);
> -  ASSERT (Head != NULL);
> -
> -  if (Nbuf->TotalSize < sizeof (TCP_HEAD)) {
> -    DEBUG ((EFI_D_NET, "TcpInput: received a malformed packet\n"));
> -    goto DISCARD;
> -  }
> -
> -  Len     = Nbuf->TotalSize - (Head->HeadLen << 2);
> -
> -  if ((Head->HeadLen < 5) || (Len < 0) ||
> -      (TcpChecksum (Nbuf, NetPseudoHeadChecksum (Src, Dst, 6, 0)) != 0)) {
> -
> -    DEBUG ((EFI_D_NET, "TcpInput: received a malformed packet\n"));
> -    goto DISCARD;
> -  }
> -
> -  if (TCP_FLG_ON (Head->Flag, TCP_FLG_SYN)) {
> -    Len++;
> -  }
> -
> -  if (TCP_FLG_ON (Head->Flag, TCP_FLG_FIN)) {
> -    Len++;
> -  }
> -
> -  Tcb = TcpLocateTcb (
> -          Head->DstPort,
> -          Dst,
> -          Head->SrcPort,
> -          Src,
> -          (BOOLEAN) TCP_FLG_ON (Head->Flag, TCP_FLG_SYN)
> -          );
> -
> -  if ((Tcb == NULL) || (Tcb->State == TCP_CLOSED)) {
> -    DEBUG ((EFI_D_NET, "TcpInput: send reset because no TCB found\n"));
> -
> -    Tcb = NULL;
> -    goto SEND_RESET;
> -  }
> -
> -  Seg = TcpFormatNetbuf (Tcb, Nbuf);
> -
> -  //
> -  // RFC1122 recommended reaction to illegal option
> -  // (in fact, an illegal option length) is reset.
> -  //
> -  if (TcpParseOption (Nbuf->Tcp, &Option) == -1) {
> -    DEBUG ((EFI_D_ERROR, "TcpInput: reset the peer because"
> -      " of malformed option for TCB %p\n", Tcb));
> -
> -    goto SEND_RESET;
> -  }
> -
> -  //
> -  // From now on, the segment is headless
> -  //
> -  NetbufTrim (Nbuf, (Head->HeadLen << 2), NET_BUF_HEAD);
> -  Nbuf->Tcp = NULL;
> -
> -  //
> -  // Process the segment in LISTEN state.
> -  //
> -  if (Tcb->State == TCP_LISTEN) {
> -    //
> -    // First step: Check RST
> -    //
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_RST)) {
> -      DEBUG ((EFI_D_WARN, "TcpInput: discard a reset segment "
> -        "for TCB %p in listening\n", Tcb));
> -
> -      goto DISCARD;
> -    }
> -
> -    //
> -    // Second step: Check ACK.
> -    // Any ACK sent to TCP in LISTEN is reseted.
> -    //
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_ACK)) {
> -      DEBUG ((EFI_D_WARN, "TcpInput: send reset because of"
> -        " segment with ACK for TCB %p in listening\n", Tcb));
> -
> -      goto SEND_RESET;
> -    }
> -
> -    //
> -    // Third step: Check SYN
> -    //
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN)) {
> -      //
> -      // create a child TCB to handle the data
> -      //
> -      Parent  = Tcb;
> -
> -      Tcb     = TcpCloneTcb (Parent);
> -      if (Tcb == NULL) {
> -        DEBUG ((EFI_D_ERROR, "TcpInput: discard a segment because"
> -          " failed to clone a child for TCB %p\n", Tcb));
> -
> -        goto DISCARD;
> -      }
> -
> -      DEBUG ((EFI_D_NET, "TcpInput: create a child for TCB %p"
> -        " in listening\n", Tcb));
> -
> -      //
> -      // init the TCB structure
> -      //
> -      Tcb->LocalEnd.Ip    = Dst;
> -      Tcb->LocalEnd.Port  = Head->DstPort;
> -      Tcb->RemoteEnd.Ip   = Src;
> -      Tcb->RemoteEnd.Port = Head->SrcPort;
> -
> -      TcpInitTcbLocal (Tcb);
> -      TcpInitTcbPeer (Tcb, Seg, &Option);
> -
> -      TcpSetState (Tcb, TCP_SYN_RCVD);
> -      TcpSetTimer (Tcb, TCP_TIMER_CONNECT, Tcb->ConnectTimeout);
> -      TcpTrimInWnd (Tcb, Nbuf);
> -
> -      goto StepSix;
> -    }
> -
> -    goto DISCARD;
> -
> -  } else if (Tcb->State == TCP_SYN_SENT) {
> -    //
> -    // First step: Check ACK bit
> -    //
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_ACK) && (Seg->Ack != Tcb->Iss + 1)) {
> -
> -      DEBUG ((EFI_D_WARN, "TcpInput: send reset because of "
> -        "wrong ACK received for TCB %p in SYN_SENT\n", Tcb));
> -
> -      goto SEND_RESET;
> -    }
> -
> -    //
> -    // Second step: Check RST bit
> -    //
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_RST)) {
> -
> -      if (TCP_FLG_ON (Seg->Flag, TCP_FLG_ACK)) {
> -
> -        DEBUG ((EFI_D_WARN, "TcpInput: connection reset by"
> -          " peer for TCB %p in SYN_SENT\n", Tcb));
> -
> -        SOCK_ERROR (Tcb->Sk, EFI_CONNECTION_RESET);
> -        goto DROP_CONNECTION;
> -      } else {
> -
> -        DEBUG ((EFI_D_WARN, "TcpInput: discard a reset segment "
> -          "because of no ACK for TCB %p in SYN_SENT\n", Tcb));
> -
> -        goto DISCARD;
> -      }
> -    }
> -
> -    //
> -    // Third step: Check security and precedence. Skipped
> -    //
> -
> -    //
> -    // Fourth step: Check SYN. Pay attention to simultaneous open
> -    //
> -    if (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN)) {
> -
> -      TcpInitTcbPeer (Tcb, Seg, &Option);
> -
> -      if (TCP_FLG_ON (Seg->Flag, TCP_FLG_ACK)) {
> -
> -        Tcb->SndUna = Seg->Ack;
> -      }
> -
> -      TcpClearTimer (Tcb, TCP_TIMER_REXMIT);
> -
> -      if (TCP_SEQ_GT (Tcb->SndUna, Tcb->Iss)) {
> -
> -        TcpSetState (Tcb, TCP_ESTABLISHED);
> -
> -        TcpClearTimer (Tcb, TCP_TIMER_CONNECT);
> -        TcpDeliverData (Tcb);
> -
> -        if ((Tcb->CongestState == TCP_CONGEST_OPEN) &&
> -            TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RTT_ON)) {
> -
> -          TcpComputeRtt (Tcb, Tcb->RttMeasure);
> -          TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_RTT_ON);
> -        }
> -
> -        TcpTrimInWnd (Tcb, Nbuf);
> -
> -        TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW);
> -
> -        DEBUG ((EFI_D_NET, "TcpInput: connection established"
> -          " for TCB %p in SYN_SENT\n", Tcb));
> -
> -        goto StepSix;
> -      } else {
> -        //
> -        // Received a SYN segment without ACK, simultaneous open.
> -        //
> -        TcpSetState (Tcb, TCP_SYN_RCVD);
> -
> -        ASSERT (Tcb->SndNxt == Tcb->Iss + 1);
> -        TcpAdjustSndQue (Tcb, Tcb->SndNxt);
> -
> -        TcpTrimInWnd (Tcb, Nbuf);
> -
> -        DEBUG ((EFI_D_WARN, "TcpInput: simultaneous open "
> -          "for TCB %p in SYN_SENT\n", Tcb));
> -
> -        goto StepSix;
> -      }
> -    }
> -
> -    goto DISCARD;
> -  }
> -
> -  //
> -  // Process segment in SYN_RCVD or TCP_CONNECTED states
> -  //
> -
> -  //
> -  // Clear probe timer since the RecvWindow is opened.
> -  //
> -  if (Tcb->ProbeTimerOn && (Seg->Wnd != 0)) {
> -    TcpClearTimer (Tcb, TCP_TIMER_PROBE);
> -    Tcb->ProbeTimerOn = FALSE;
> -  }
> -
> -  //
> -  // First step: Check whether SEG.SEQ is acceptable
> -  //
> -  if (TcpSeqAcceptable (Tcb, Seg) == 0) {
> -    DEBUG ((EFI_D_WARN, "TcpInput: sequence acceptance"
> -      " test failed for segment of TCB %p\n", Tcb));
> -
> -    if (!TCP_FLG_ON (Seg->Flag, TCP_FLG_RST)) {
> -      TcpSendAck (Tcb);
> -    }
> -
> -    goto DISCARD;
> -  }
> -
> -  if ((TCP_SEQ_LT (Seg->Seq, Tcb->RcvWl2)) &&
> -      (Tcb->RcvWl2 == Seg->End) &&
> -      !TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN | TCP_FLG_FIN)) {
> -
> -    TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW);
> -  }
> -
> -  //
> -  // Second step: Check the RST
> -  //
> -  if (TCP_FLG_ON (Seg->Flag, TCP_FLG_RST)) {
> -
> -    DEBUG ((EFI_D_WARN, "TcpInput: connection reset for TCB %p\n", Tcb));
> -
> -    if (Tcb->State == TCP_SYN_RCVD) {
> -
> -      SOCK_ERROR (Tcb->Sk, EFI_CONNECTION_REFUSED);
> -
> -      //
> -      // This TCB comes from either a LISTEN TCB,
> -      // or active open TCB with simultanous open.
> -      // Do NOT signal user CONNECTION refused
> -      // if it comes from a LISTEN TCB.
> -      //
> -    } else if ((Tcb->State == TCP_ESTABLISHED) ||
> -               (Tcb->State == TCP_FIN_WAIT_1) ||
> -               (Tcb->State == TCP_FIN_WAIT_2) ||
> -               (Tcb->State == TCP_CLOSE_WAIT)) {
> -
> -      SOCK_ERROR (Tcb->Sk, EFI_CONNECTION_RESET);
> -
> -    } else {
> -
> -    }
> -
> -    goto DROP_CONNECTION;
> -  }
> -
> -  //
> -  // Trim the data and flags.
> -  //
> -  TcpTrimInWnd (Tcb, Nbuf);
> -
> -  //
> -  // Third step: Check security and precedence, Ignored
> -  //
> -
> -  //
> -  // Fourth step: Check the SYN bit.
> -  //
> -  if (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN)) {
> -
> -    DEBUG ((EFI_D_WARN, "TcpInput: connection reset "
> -      "because received extra SYN for TCB %p\n", Tcb));
> -
> -    SOCK_ERROR (Tcb->Sk, EFI_CONNECTION_RESET);
> -    goto RESET_THEN_DROP;
> -  }
> -
> -  //
> -  // Fifth step: Check the ACK
> -  //
> -  if (!TCP_FLG_ON (Seg->Flag, TCP_FLG_ACK)) {
> -    DEBUG ((EFI_D_WARN, "TcpInput: segment discard because"
> -      " of no ACK for connected TCB %p\n", Tcb));
> -
> -    goto DISCARD;
> -
> -  }
> -
> -  if (Tcb->State == TCP_SYN_RCVD) {
> -
> -    if (TCP_SEQ_LT (Tcb->SndUna, Seg->Ack) &&
> -        TCP_SEQ_LEQ (Seg->Ack, Tcb->SndNxt)) {
> -
> -      Tcb->SndWnd     = Seg->Wnd;
> -      Tcb->SndWndMax  = MAX (Tcb->SndWnd, Tcb->SndWndMax);
> -      Tcb->SndWl1     = Seg->Seq;
> -      Tcb->SndWl2     = Seg->Ack;
> -      TcpSetState (Tcb, TCP_ESTABLISHED);
> -
> -      TcpClearTimer (Tcb, TCP_TIMER_CONNECT);
> -      TcpDeliverData (Tcb);
> -
> -      DEBUG ((EFI_D_NET, "TcpInput: connection established "
> -        " for TCB %p in SYN_RCVD\n", Tcb));
> -
> -      //
> -      // Continue the process as ESTABLISHED state
> -      //
> -    } else {
> -      DEBUG ((EFI_D_WARN, "TcpInput: send reset because of"
> -        " wrong ACK for TCB %p in SYN_RCVD\n", Tcb));
> -
> -      goto SEND_RESET;
> -    }
> -  }
> -
> -  if (TCP_SEQ_LT (Seg->Ack, Tcb->SndUna)) {
> -
> -    DEBUG ((EFI_D_WARN, "TcpInput: ignore the out-of-data"
> -      " ACK for connected TCB %p\n", Tcb));
> -
> -    goto StepSix;
> -
> -  } else if (TCP_SEQ_GT (Seg->Ack, Tcb->SndNxt)) {
> -
> -    DEBUG ((EFI_D_WARN, "TcpInput: discard segment for "
> -      "future ACK for connected TCB %p\n", Tcb));
> -
> -    TcpSendAck (Tcb);
> -    goto DISCARD;
> -  }
> -
> -  //
> -  // From now on: SND.UNA <= SEG.ACK <= SND.NXT.
> -  //
> -  if (TCP_FLG_ON (Option.Flag, TCP_OPTION_RCVD_TS)) {
> -    //
> -    // update TsRecent as specified in page 16 RFC1323.
> -    // RcvWl2 equals to the variable "LastAckSent"
> -    // defined there.
> -    //
> -    if (TCP_SEQ_LEQ (Seg->Seq, Tcb->RcvWl2) &&
> -        TCP_SEQ_LT (Tcb->RcvWl2, Seg->End)) {
> -
> -      Tcb->TsRecent     = Option.TSVal;
> -      Tcb->TsRecentAge  = mTcpTick;
> -    }
> -
> -    TcpComputeRtt (Tcb, TCP_SUB_TIME (mTcpTick, Option.TSEcr));
> -
> -  } else if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RTT_ON)) {
> -
> -    ASSERT (Tcb->CongestState == TCP_CONGEST_OPEN);
> -
> -    TcpComputeRtt (Tcb, Tcb->RttMeasure);
> -    TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_RTT_ON);
> -  }
> -
> -  if (Seg->Ack == Tcb->SndNxt) {
> -
> -    TcpClearTimer (Tcb, TCP_TIMER_REXMIT);
> -  } else {
> -
> -    TcpSetTimer (Tcb, TCP_TIMER_REXMIT, Tcb->Rto);
> -  }
> -
> -  //
> -  // Count duplicate acks.
> -  //
> -  if ((Seg->Ack == Tcb->SndUna) &&
> -      (Tcb->SndUna != Tcb->SndNxt) &&
> -      (Seg->Wnd == Tcb->SndWnd) &&
> -      (0 == Len)) {
> -
> -    Tcb->DupAck++;
> -  } else {
> -
> -    Tcb->DupAck = 0;
> -  }
> -
> -  //
> -  // Congestion avoidance, fast recovery and fast retransmission.
> -  //
> -  if (((Tcb->CongestState == TCP_CONGEST_OPEN) && (Tcb->DupAck < 3)) ||
> -      (Tcb->CongestState == TCP_CONGEST_LOSS)) {
> -
> -    if (TCP_SEQ_GT (Seg->Ack, Tcb->SndUna)) {
> -
> -      if (Tcb->CWnd < Tcb->Ssthresh) {
> -
> -        Tcb->CWnd += Tcb->SndMss;
> -      } else {
> -
> -        Tcb->CWnd += MAX (Tcb->SndMss * Tcb->SndMss / Tcb->CWnd, 1);
> -      }
> -
> -      Tcb->CWnd = MIN (Tcb->CWnd, TCP_MAX_WIN << Tcb->SndWndScale);
> -    }
> -
> -    if (Tcb->CongestState == TCP_CONGEST_LOSS) {
> -      TcpFastLossRecover (Tcb, Seg);
> -    }
> -  } else {
> -
> -    TcpFastRecover (Tcb, Seg);
> -  }
> -
> -  if (TCP_SEQ_GT (Seg->Ack, Tcb->SndUna)) {
> -
> -    TcpAdjustSndQue (Tcb, Seg->Ack);
> -    Tcb->SndUna = Seg->Ack;
> -
> -    if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_SND_URG) &&
> -        TCP_SEQ_LT (Tcb->SndUp, Seg->Ack)) {
> -
> -      TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_URG);
> -    }
> -  }
> -
> -  //
> -  // Update window info
> -  //
> -  if (TCP_SEQ_LT (Tcb->SndWl1, Seg->Seq) ||
> -      ((Tcb->SndWl1 == Seg->Seq) && TCP_SEQ_LEQ (Tcb->SndWl2, Seg->Ack))) {
> -
> -    Right = Seg->Ack + Seg->Wnd;
> -
> -    if (TCP_SEQ_LT (Right, Tcb->SndWl2 + Tcb->SndWnd)) {
> -
> -      if ((Tcb->SndWl1 == Seg->Seq) &&
> -          (Tcb->SndWl2 == Seg->Ack) &&
> -          (Len == 0)) {
> -
> -        goto NO_UPDATE;
> -      }
> -
> -      DEBUG ((EFI_D_WARN, "TcpInput: peer shrinks the"
> -        " window for connected TCB %p\n", Tcb));
> -
> -      if ((Tcb->CongestState == TCP_CONGEST_RECOVER) &&
> -          (TCP_SEQ_LT (Right, Tcb->Recover))) {
> -
> -        Tcb->Recover = Right;
> -      }
> -
> -      if ((Tcb->CongestState == TCP_CONGEST_LOSS) &&
> -          (TCP_SEQ_LT (Right, Tcb->LossRecover))) {
> -
> -        Tcb->LossRecover = Right;
> -      }
> -
> -      if (TCP_SEQ_LT (Right, Tcb->SndNxt)) {
> -        //
> -        // Check for Window Retraction in RFC7923 section 2.4.
> -        // The lower n bits of the peer's actual receive window is wiped out if TCP
> -        // window scale is enabled, it will look like the peer is shrinking the window.
> -        // Check whether the SndNxt is out of the advertised receive window by
> more than
> -        // 2^Rcv.Wind.Shift before moving the SndNxt to the left.
> -        //
> -        DEBUG (
> -          (EFI_D_WARN,
> -          "TcpInput: peer advise negative useable window for connected TCB %p\n",
> -          Tcb)
> -          );
> -        Usable = TCP_SUB_SEQ (Tcb->SndNxt, Right);
> -        if ((Usable >> Tcb->SndWndScale) > 0) {
> -          DEBUG (
> -            (EFI_D_WARN,
> -            "TcpInput: SndNxt is out of window by more than window scale for
> TCB %p\n",
> -            Tcb)
> -            );
> -          Tcb->SndNxt = Right;
> -        }
> -        if (Right == Tcb->SndUna) {
> -
> -          TcpClearTimer (Tcb, TCP_TIMER_REXMIT);
> -          TcpSetProbeTimer (Tcb);
> -        }
> -      }
> -    }
> -
> -    Tcb->SndWnd     = Seg->Wnd;
> -    Tcb->SndWndMax  = MAX (Tcb->SndWnd, Tcb->SndWndMax);
> -    Tcb->SndWl1     = Seg->Seq;
> -    Tcb->SndWl2     = Seg->Ack;
> -  }
> -
> -NO_UPDATE:
> -
> -  if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_FIN_SENT) &&
> -      (Tcb->SndUna == Tcb->SndNxt)) {
> -
> -    DEBUG ((EFI_D_NET, "TcpInput: local FIN is ACKed by"
> -      " peer for connected TCB %p\n", Tcb));
> -
> -    TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_FIN_ACKED);
> -  }
> -
> -  //
> -  // Transit the state if proper.
> -  //
> -  switch (Tcb->State) {
> -  case TCP_FIN_WAIT_1:
> -
> -    if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_FIN_ACKED)) {
> -
> -      TcpSetState (Tcb, TCP_FIN_WAIT_2);
> -
> -      TcpClearAllTimer (Tcb);
> -      TcpSetTimer (Tcb, TCP_TIMER_FINWAIT2, Tcb->FinWait2Timeout);
> -    }
> -
> -  case TCP_FIN_WAIT_2:
> -
> -    break;
> -
> -  case TCP_CLOSE_WAIT:
> -    break;
> -
> -  case TCP_CLOSING:
> -
> -    if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_FIN_ACKED)) {
> -
> -      TcpSetState (Tcb, TCP_TIME_WAIT);
> -
> -      TcpClearAllTimer (Tcb);
> -
> -      if (Tcb->TimeWaitTimeout != 0) {
> -
> -        TcpSetTimer (Tcb, TCP_TIMER_2MSL, Tcb->TimeWaitTimeout);
> -      } else {
> -
> -        DEBUG ((EFI_D_WARN, "Connection closed immediately "
> -          "because app disables TIME_WAIT timer for %p\n", Tcb));
> -
> -        TcpClose (Tcb);
> -      }
> -    }
> -    break;
> -
> -  case TCP_LAST_ACK:
> -
> -    if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_FIN_ACKED)) {
> -
> -      TcpSetState (Tcb, TCP_CLOSED);
> -    }
> -
> -    break;
> -
> -  case TCP_TIME_WAIT:
> -
> -    TcpSendAck (Tcb);
> -
> -    if (Tcb->TimeWaitTimeout != 0) {
> -
> -      TcpSetTimer (Tcb, TCP_TIMER_2MSL, Tcb->TimeWaitTimeout);
> -    } else {
> -
> -      DEBUG ((EFI_D_WARN, "Connection closed immediately "
> -        "because app disables TIME_WAIT timer for %p\n", Tcb));
> -
> -      TcpClose (Tcb);
> -    }
> -    break;
> -
> -  default:
> -    break;
> -  }
> -
> -  //
> -  // Sixth step: Check the URG bit.update the Urg point
> -  // if in TCP_CAN_RECV, otherwise, leave the RcvUp intact.
> -  //
> -StepSix:
> -
> -  Tcb->Idle = 0;
> -  TcpSetKeepaliveTimer (Tcb);
> -
> -  if (TCP_FLG_ON (Seg->Flag, TCP_FLG_URG) &&
> -      !TCP_FIN_RCVD (Tcb->State))
> -  {
> -
> -    DEBUG ((EFI_D_NET, "TcpInput: received urgent data "
> -      "from peer for connected TCB %p\n", Tcb));
> -
> -    Urg = Seg->Seq + Seg->Urg;
> -
> -    if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RCVD_URG) &&
> -        TCP_SEQ_GT (Urg, Tcb->RcvUp)) {
> -
> -      Tcb->RcvUp = Urg;
> -    } else {
> -
> -      Tcb->RcvUp = Urg;
> -      TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_RCVD_URG);
> -    }
> -  }
> -
> -  //
> -  // Seventh step: Process the segment data
> -  //
> -  if (Seg->End != Seg->Seq) {
> -
> -    if (TCP_FIN_RCVD (Tcb->State)) {
> -
> -      DEBUG ((EFI_D_WARN, "TcpInput: connection reset because"
> -        " data is lost for connected TCB %p\n", Tcb));
> -
> -      goto RESET_THEN_DROP;
> -    }
> -
> -    if (TCP_LOCAL_CLOSED (Tcb->State) && (Nbuf->TotalSize != 0)) {
> -      DEBUG ((EFI_D_WARN, "TcpInput: connection reset because"
> -        " data is lost for connected TCB %p\n", Tcb));
> -
> -      goto RESET_THEN_DROP;
> -    }
> -
> -    TcpQueueData (Tcb, Nbuf);
> -    if (TcpDeliverData (Tcb) == -1) {
> -      goto RESET_THEN_DROP;
> -    }
> -
> -    if (!IsListEmpty (&Tcb->RcvQue)) {
> -      TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW);
> -    }
> -  }
> -
> -  //
> -  // Eighth step: check the FIN.
> -  // This step is moved to TcpDeliverData. FIN will be
> -  // processed in sequence there. Check the comments in
> -  // the beginning of the file header for information.
> -  //
> -
> -  //
> -  // Tcb is a new child of the listening Parent,
> -  // commit it.
> -  //
> -  if (Parent != NULL) {
> -    Tcb->Parent = Parent;
> -    TcpInsertTcb (Tcb);
> -  }
> -
> -  if ((Tcb->State != TCP_CLOSED) &&
> -      (TcpToSendData (Tcb, 0) == 0) &&
> -      (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW) || (Nbuf->TotalSize !=
> 0))) {
> -
> -    TcpToSendAck (Tcb);
> -  }
> -
> -  NetbufFree (Nbuf);
> -  return 0;
> -
> -RESET_THEN_DROP:
> -  TcpSendReset (Tcb, Head, Len, Dst, Src);
> -
> -DROP_CONNECTION:
> -  ASSERT ((Tcb != NULL) && (Tcb->Sk != NULL));
> -
> -  NetbufFree (Nbuf);
> -  TcpClose (Tcb);
> -
> -  return -1;
> -
> -SEND_RESET:
> -
> -  TcpSendReset (Tcb, Head, Len, Dst, Src);
> -
> -DISCARD:
> -
> -  //
> -  // Tcb is a child of Parent, and it doesn't survive
> -  //
> -  DEBUG ((EFI_D_WARN, "Tcp4Input: Discard a packet\n"));
> -  NetbufFree (Nbuf);
> -
> -  if ((Parent != NULL) && (Tcb != NULL)) {
> -
> -    ASSERT (Tcb->Sk != NULL);
> -    TcpClose (Tcb);
> -  }
> -
> -  return 0;
> -}
> -
> -
> -/**
> -  Process the received ICMP error messages for TCP.
> -
> -  @param  Nbuf     Buffer that contains part of the TCP segment without IP
> header
> -                   truncated from the ICMP error packet.
> -  @param  IcmpErr  The ICMP error code interpreted from ICMP error packet.
> -  @param  Src      Source address of the ICMP error message.
> -  @param  Dst      Destination address of the ICMP error message.
> -
> -**/
> -VOID
> -TcpIcmpInput (
> -  IN NET_BUF     *Nbuf,
> -  IN UINT8       IcmpErr,
> -  IN UINT32      Src,
> -  IN UINT32      Dst
> -  )
> -{
> -  TCP_HEAD         *Head;
> -  TCP_CB           *Tcb;
> -  TCP_SEQNO        Seq;
> -  EFI_STATUS       IcmpErrStatus;
> -  BOOLEAN          IcmpErrIsHard;
> -  BOOLEAN          IcmpErrNotify;
> -
> -  if (Nbuf->TotalSize < sizeof (TCP_HEAD)) {
> -    goto CLEAN_EXIT;
> -  }
> -
> -  Head = (TCP_HEAD *) NetbufGetByte (Nbuf, 0, NULL);
> -  ASSERT (Head != NULL);
> -  Tcb = TcpLocateTcb (
> -          Head->DstPort,
> -          Dst,
> -          Head->SrcPort,
> -          Src,
> -          FALSE
> -          );
> -  if (Tcb == NULL || Tcb->State == TCP_CLOSED) {
> -
> -    goto CLEAN_EXIT;
> -  }
> -
> -  //
> -  // Validate the sequence number.
> -  //
> -  Seq = NTOHL (Head->Seq);
> -  if (!(TCP_SEQ_LEQ (Tcb->SndUna, Seq) && TCP_SEQ_LT (Seq, Tcb->SndNxt))) {
> -
> -    goto CLEAN_EXIT;
> -  }
> -
> -  IcmpErrStatus = IpIoGetIcmpErrStatus (
> -                    IcmpErr,
> -                    IP_VERSION_4,
> -                    &IcmpErrIsHard,
> -                    &IcmpErrNotify
> -                    );
> -
> -  if (IcmpErrNotify) {
> -
> -    SOCK_ERROR (Tcb->Sk, IcmpErrStatus);
> -  }
> -
> -  if (IcmpErrIsHard) {
> -
> -    TcpClose (Tcb);
> -  }
> -
> -CLEAN_EXIT:
> -  NetbufFree (Nbuf);
> -}
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Io.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Io.c
> deleted file mode 100644
> index b98d1e783a2f..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Io.c
> +++ /dev/null
> @@ -1,112 +0,0 @@
> -/** @file
> -  I/O interfaces between TCP and IpIo.
> -
> -Copyright (c) 2005 - 2009, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#include "Tcp4Main.h"
> -
> -
> -/**
> -  Packet receive callback function provided to IP_IO, used to call
> -  the proper function to handle the packet received by IP.
> -
> -  @param  Status      Status of the received packet.
> -  @param  IcmpErr     ICMP error number.
> -  @param  NetSession  Pointer to the net session of this packet.
> -  @param  Pkt         Pointer to the recieved packet.
> -  @param  Context     Pointer to the context configured in IpIoOpen(), not used
> -                      now.
> -
> -**/
> -VOID
> -EFIAPI
> -Tcp4RxCallback (
> -  IN EFI_STATUS                       Status,
> -  IN UINT8                            IcmpErr,
> -  IN EFI_NET_SESSION_DATA             *NetSession,
> -  IN NET_BUF                          *Pkt,
> -  IN VOID                             *Context    OPTIONAL
> -  )
> -{
> -  if (EFI_SUCCESS == Status) {
> -    TcpInput (Pkt, NetSession->Source.Addr[0], NetSession->Dest.Addr[0]);
> -  } else {
> -    TcpIcmpInput (Pkt, IcmpErr, NetSession->Source.Addr[0], NetSession-
> >Dest.Addr[0]);
> -  }
> -}
> -
> -
> -/**
> -  Send the segment to IP via IpIo function.
> -
> -  @param  Tcb         Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf        Pointer to the TCP segment to be sent.
> -  @param  Src         Source address of the TCP segment.
> -  @param  Dest        Destination address of the TCP segment.
> -
> -  @retval 0           The segment was sent out successfully.
> -  @retval -1          The segment was failed to send.
> -
> -**/
> -INTN
> -TcpSendIpPacket (
> -  IN TCP_CB    *Tcb,
> -  IN NET_BUF   *Nbuf,
> -  IN UINT32    Src,
> -  IN UINT32    Dest
> -  )
> -{
> -  EFI_STATUS       Status;
> -  IP_IO            *IpIo;
> -  IP_IO_OVERRIDE   Override;
> -  SOCKET           *Sock;
> -  VOID             *IpSender;
> -  TCP4_PROTO_DATA  *TcpProto;
> -  EFI_IP_ADDRESS   Source;
> -  EFI_IP_ADDRESS   Destination;
> -
> -  Source.Addr[0]      = Src;
> -  Destination.Addr[0] = Dest;
> -
> -  if (NULL == Tcb) {
> -
> -    IpIo     = NULL;
> -    IpSender = IpIoFindSender (&IpIo, IP_VERSION_4, &Source);
> -
> -    if (IpSender == NULL) {
> -      DEBUG ((EFI_D_WARN, "TcpSendIpPacket: No appropriate IpSender.\n"));
> -      return -1;
> -    }
> -  } else {
> -
> -    Sock     = Tcb->Sk;
> -    TcpProto = (TCP4_PROTO_DATA *) Sock->ProtoReserved;
> -    IpIo     = TcpProto->TcpService->IpIo;
> -    IpSender = Tcb->IpInfo;
> -  }
> -
> -  Override.Ip4OverrideData.TypeOfService            = 0;
> -  Override.Ip4OverrideData.TimeToLive               = 255;
> -  Override.Ip4OverrideData.DoNotFragment            = FALSE;
> -  Override.Ip4OverrideData.Protocol                 = EFI_IP_PROTO_TCP;
> -  ZeroMem (&Override.Ip4OverrideData.GatewayAddress, sizeof
> (EFI_IPv4_ADDRESS));
> -  CopyMem (&Override.Ip4OverrideData.SourceAddress, &Src, sizeof
> (EFI_IPv4_ADDRESS));
> -
> -  Status = IpIoSend (IpIo, Nbuf, IpSender, NULL, NULL, &Destination, &Override);
> -
> -  if (EFI_ERROR (Status)) {
> -    DEBUG ((EFI_D_ERROR, "TcpSendIpPacket: return %r error\n", Status));
> -    return -1;
> -  }
> -
> -  return 0;
> -}
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.c
> deleted file mode 100644
> index d8fc68c0a97d..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.c
> +++ /dev/null
> @@ -1,674 +0,0 @@
> -/** @file
> -  Implementation of TCP4 protocol services.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -
> -#include "Tcp4Main.h"
> -
> -
> -/**
> -  Check the integrity of the data buffer.
> -
> -  @param  DataLen                  The total length of the data buffer.
> -  @param  FragmentCount            The fragment count of the fragment table.
> -  @param  FragmentTable            Pointer to the fragment table of the data
> -                                   buffer.
> -
> -  @retval EFI_SUCCESS              The integrity check is passed.
> -  @retval EFI_INVALID_PARAMETER    The integrity check is failed.
> -
> -**/
> -EFI_STATUS
> -Tcp4ChkDataBuf (
> -  IN UINT32                 DataLen,
> -  IN UINT32                 FragmentCount,
> -  IN EFI_TCP4_FRAGMENT_DATA *FragmentTable
> -  )
> -{
> -  UINT32 Index;
> -
> -  UINT32 Len;
> -
> -  for (Index = 0, Len = 0; Index < FragmentCount; Index++) {
> -    Len = Len + (UINT32) FragmentTable[Index].FragmentLength;
> -  }
> -
> -  if (DataLen != Len) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  return EFI_SUCCESS;
> -}
> -
> -
> -/**
> -  Get the current operational status.
> -
> -  The GetModeData() function copies the current operational settings of this
> -  EFI TCPv4 Protocol instance into user-supplied buffers. This function can
> -  also be used to retrieve the operational setting of underlying drivers
> -  such as IPv4, MNP, or SNP.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  Tcp4State                Pointer to the buffer to receive the current TCP
> -                                   state.
> -  @param  Tcp4ConfigData           Pointer to the buffer to receive the current
> TCP
> -                                   configuration.
> -  @param  Ip4ModeData              Pointer to the buffer to receive the current
> IPv4
> -                                   configuration data used by the TCPv4 instance.
> -  @param  MnpConfigData            Pointer to the buffer to receive the current
> MNP
> -                                   configuration data indirectly used by the TCPv4
> -                                   Instance.
> -  @param  SnpModeData              Pointer to the buffer to receive the current
> SNP
> -                                   configuration data indirectly used by the TCPv4
> -                                   Instance.
> -
> -  @retval EFI_SUCCESS              The mode data was read.
> -  @retval EFI_NOT_STARTED          No configuration data is available because
> this
> -                                   instance hasn't been started.
> -  @retval EFI_INVALID_PARAMETER    This is NULL.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4GetModeData (
> -  IN      EFI_TCP4_PROTOCOL                  *This,
> -     OUT  EFI_TCP4_CONNECTION_STATE          *Tcp4State       OPTIONAL,
> -     OUT  EFI_TCP4_CONFIG_DATA               *Tcp4ConfigData  OPTIONAL,
> -     OUT  EFI_IP4_MODE_DATA                  *Ip4ModeData     OPTIONAL,
> -     OUT  EFI_MANAGED_NETWORK_CONFIG_DATA    *MnpConfigData
> OPTIONAL,
> -     OUT  EFI_SIMPLE_NETWORK_MODE            *SnpModeData     OPTIONAL
> -  )
> -{
> -  TCP4_MODE_DATA  TcpMode;
> -  SOCKET          *Sock;
> -
> -  if (NULL == This) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  Sock                    = SOCK_FROM_THIS (This);
> -
> -  TcpMode.Tcp4State       = Tcp4State;
> -  TcpMode.Tcp4ConfigData  = Tcp4ConfigData;
> -  TcpMode.Ip4ModeData     = Ip4ModeData;
> -  TcpMode.MnpConfigData   = MnpConfigData;
> -  TcpMode.SnpModeData     = SnpModeData;
> -
> -  return SockGetMode (Sock, &TcpMode);
> -}
> -
> -
> -/**
> -  Initialize or brutally reset the operational parameters for
> -  this EFI TCPv4 instance.
> -
> -  The Configure() function does the following:
> -  * Initialize this EFI TCPv4 instance, i.e., initialize the communication end
> -  setting, specify active open or passive open for an instance.
> -  * Reset this TCPv4 instance brutally, i.e., cancel all pending asynchronous
> -  tokens, flush transmission and receiving buffer directly without informing
> -  the communication peer.
> -  No other TCPv4 Protocol operation can be executed by this instance
> -  until it is configured properly. For an active TCP4 instance, after a proper
> -  configuration it may call Connect() to initiates the three-way handshake.
> -  For a passive TCP4 instance, its state will transit to Tcp4StateListen after
> -  configuration, and Accept() may be called to listen the incoming TCP
> connection
> -  request. If TcpConfigData is set to NULL, the instance is reset. Resetting
> -  process will be done brutally, the state machine will be set to Tcp4StateClosed
> -  directly, the receive queue and transmit queue will be flushed, and no traffic is
> -  allowed through this instance.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  TcpConfigData            Pointer to the configure data to configure the
> -                                   instance.
> -
> -  @retval EFI_SUCCESS              The operational settings are set, changed, or
> -                                   reset successfully.
> -  @retval EFI_NO_MAPPING           When using a default address, configuration
> -                                   (through DHCP, BOOTP, RARP, etc.) is not
> -                                   finished.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_ACCESS_DENIED        Configuring TCP instance when it is already
> -                                   configured.
> -  @retval EFI_DEVICE_ERROR         An unexpected network or system error
> occurred.
> -  @retval EFI_UNSUPPORTED          One or more of the control options are not
> -                                   supported in the implementation.
> -  @retval EFI_OUT_OF_RESOURCES     Could not allocate enough system
> resources.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Configure (
> -  IN EFI_TCP4_PROTOCOL        *This,
> -  IN EFI_TCP4_CONFIG_DATA     *TcpConfigData     OPTIONAL
> -  )
> -{
> -  EFI_TCP4_OPTION  *Option;
> -  SOCKET           *Sock;
> -  EFI_STATUS       Status;
> -  IP4_ADDR         Ip;
> -  IP4_ADDR         SubnetMask;
> -
> -  if (NULL == This) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  //
> -  // Tcp protocol related parameter check will be conducted here
> -  //
> -  if (NULL != TcpConfigData) {
> -
> -    CopyMem (&Ip, &TcpConfigData->AccessPoint.RemoteAddress, sizeof
> (IP4_ADDR));
> -    if (IP4_IS_LOCAL_BROADCAST (NTOHL (Ip))) {
> -      return EFI_INVALID_PARAMETER;
> -    }
> -
> -    if (TcpConfigData->AccessPoint.ActiveFlag &&
> -      (0 == TcpConfigData->AccessPoint.RemotePort || (Ip == 0))) {
> -      return EFI_INVALID_PARAMETER;
> -    }
> -
> -    if (!TcpConfigData->AccessPoint.UseDefaultAddress) {
> -
> -      CopyMem (&Ip, &TcpConfigData->AccessPoint.StationAddress, sizeof
> (IP4_ADDR));
> -      CopyMem (&SubnetMask, &TcpConfigData->AccessPoint.SubnetMask,
> sizeof (IP4_ADDR));
> -      if (!IP4_IS_VALID_NETMASK (NTOHL (SubnetMask)) ||
> -          (SubnetMask != 0 && !NetIp4IsUnicast (NTOHL (Ip), NTOHL
> (SubnetMask)))) {
> -        return EFI_INVALID_PARAMETER;
> -      }
> -    }
> -
> -    Option = TcpConfigData->ControlOption;
> -    if ((NULL != Option) &&
> -        (Option->EnableSelectiveAck || Option->EnablePathMtuDiscovery)) {
> -      return EFI_UNSUPPORTED;
> -    }
> -  }
> -
> -  Sock = SOCK_FROM_THIS (This);
> -
> -  if (NULL == TcpConfigData) {
> -    return SockFlush (Sock);
> -  }
> -
> -  Status = SockConfigure (Sock, TcpConfigData);
> -
> -  if (EFI_NO_MAPPING == Status) {
> -    Sock->ConfigureState = SO_NO_MAPPING;
> -  }
> -
> -  return Status;
> -}
> -
> -
> -/**
> -  Add or delete routing entries.
> -
> -  The Routes() function adds or deletes a route from the instance's routing table.
> -  The most specific route is selected by comparing the SubnetAddress with the
> -  destination IP address's arithmetical AND to the SubnetMask.
> -  The default route is added with both SubnetAddress and SubnetMask set to
> 0.0.0.0.
> -  The default route matches all destination IP addresses if there is no more
> specific route.
> -  Direct route is added with GatewayAddress set to 0.0.0.0. Packets are sent to
> -  the destination host if its address can be found in the Address Resolution
> Protocol (ARP)
> -  cache or it is on the local subnet. If the instance is configured to use default
> -  address, a direct route to the local network will be added automatically.
> -  Each TCP instance has its own independent routing table. Instance that uses
> the
> -  default IP address will have a copy of the EFI_IP4_CONFIG_PROTOCOL's
> routing table.
> -  The copy will be updated automatically whenever the IP driver reconfigures its
> -  instance. As a result, the previous modification to the instance's local copy
> -  will be lost. The priority of checking the route table is specific with IP
> -  implementation and every IP implementation must comply with RFC 1122.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  DeleteRoute              If TRUE, delete the specified route from routing
> -                                   table; if FALSE, add the specified route to
> -                                   routing table.
> -                                   DestinationAddress and SubnetMask are used as
> -                                   the keywords to search route entry.
> -  @param  SubnetAddress            The destination network.
> -  @param  SubnetMask               The subnet mask for the destination network.
> -  @param  GatewayAddress           The gateway address for this route.
> -                                   It must be on the same subnet with the station
> -                                   address unless a direct route is specified.
> -
> -  @retval EFI_SUCCESS              The operation completed successfully.
> -  @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance has not
> been
> -                                   configured.
> -  @retval EFI_NO_MAPPING           When using a default address, configuration
> -                                   (through DHCP, BOOTP, RARP, etc.) is not
> -                                   finished.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_OUT_OF_RESOURCES     Could not allocate enough resources to
> add the
> -                                   entry to the routing table.
> -  @retval EFI_NOT_FOUND            This route is not in the routing table.
> -  @retval EFI_ACCESS_DENIED        This route is already in the routing table.
> -  @retval EFI_UNSUPPORTED          The TCP driver does not support this
> operation.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Routes (
> -  IN EFI_TCP4_PROTOCOL           *This,
> -  IN BOOLEAN                     DeleteRoute,
> -  IN EFI_IPv4_ADDRESS            *SubnetAddress,
> -  IN EFI_IPv4_ADDRESS            *SubnetMask,
> -  IN EFI_IPv4_ADDRESS            *GatewayAddress
> -  )
> -{
> -  SOCKET          *Sock;
> -  TCP4_ROUTE_INFO RouteInfo;
> -
> -  if (NULL == This) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  Sock                      = SOCK_FROM_THIS (This);
> -
> -  RouteInfo.DeleteRoute     = DeleteRoute;
> -  RouteInfo.SubnetAddress   = SubnetAddress;
> -  RouteInfo.SubnetMask      = SubnetMask;
> -  RouteInfo.GatewayAddress  = GatewayAddress;
> -
> -  return SockRoute (Sock, &RouteInfo);
> -}
> -
> -
> -/**
> -  Initiate a nonblocking TCP connection request for an active TCP instance.
> -
> -  The Connect() function will initiate an active open to the remote peer
> configured
> -  in current TCP instance if it is configured active. If the connection succeeds
> -  or fails due to any error, the ConnectionToken->CompletionToken.Event will
> be
> -  signaled and ConnectionToken->CompletionToken.Status will be updated
> accordingly.
> -  This function can only be called for the TCP instance in Tcp4StateClosed state.
> -  The instance will transfer into Tcp4StateSynSent if the function returns
> EFI_SUCCESS.
> -  If TCP three way handshake succeeds, its state will become
> Tcp4StateEstablished,
> -  otherwise, the state will return to Tcp4StateClosed.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance
> -  @param  ConnectionToken          Pointer to the connection token to return
> when
> -                                   the TCP three way handshake finishes.
> -
> -  @retval EFI_SUCCESS              The connection request is successfully initiated
> -                                   and the state of this TCPv4 instance has
> -                                   been changed to Tcp4StateSynSent.
> -  @retval EFI_NOT_STARTED          This EFI_TCP4_PROTOCOL instance hasn't
> been
> -                                   configured.
> -  @retval EFI_ACCESS_DENIED        The instance is not configured as an active
> one
> -                                   or it is not in Tcp4StateClosed state.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_OUT_OF_RESOURCES     The driver can't allocate enough
> resource to
> -                                   initiate the active open.
> -  @retval EFI_DEVICE_ERROR         An unexpected system or network error
> occurred.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Connect (
> -  IN EFI_TCP4_PROTOCOL           *This,
> -  IN EFI_TCP4_CONNECTION_TOKEN   *ConnectionToken
> -  )
> -{
> -  SOCKET  *Sock;
> -
> -  if (NULL == This ||
> -      NULL == ConnectionToken ||
> -      NULL == ConnectionToken->CompletionToken.Event) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  Sock = SOCK_FROM_THIS (This);
> -
> -  return SockConnect (Sock, ConnectionToken);
> -}
> -
> -
> -/**
> -  Listen on the passive instance to accept an incoming connection request.
> -
> -  The Accept() function initiates an asynchronous accept request to wait for an
> -  incoming connection on the passive TCP instance. If a remote peer
> successfully
> -  establishes a connection with this instance, a new TCP instance will be created
> -  and its handle will be returned in ListenToken->NewChildHandle. The newly
> created
> -  instance is configured by inheriting the passive instance's configuration and is
> -  ready for use upon return. The instance is in the Tcp4StateEstablished state.
> -  The ListenToken->CompletionToken.Event will be signaled when a new
> connection
> -  is accepted, user aborts the listen or connection is reset. This function only
> -  can be called when current TCP instance is in Tcp4StateListen state.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance
> -  @param  ListenToken              Pointer to the listen token to return when
> -                                   operation finishes.
> -
> -  @retval EFI_SUCCESS              The listen token has been queued successfully.
> -  @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance hasn't
> been
> -                                   configured.
> -  @retval EFI_ACCESS_DENIED        The instatnce is not a passive one or it is not
> -                                   in Tcp4StateListen state or a same listen token
> -                                   has already existed in the listen token queue of
> -                                   this TCP instance.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_OUT_OF_RESOURCES     Could not allocate enough resources to
> finish
> -                                   the operation.
> -  @retval EFI_DEVICE_ERROR         Any unexpected and not belonged to above
> category error.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Accept (
> -  IN EFI_TCP4_PROTOCOL             *This,
> -  IN EFI_TCP4_LISTEN_TOKEN         *ListenToken
> -  )
> -{
> -  SOCKET  *Sock;
> -
> -  if (NULL == This ||
> -      NULL == ListenToken ||
> -      NULL == ListenToken->CompletionToken.Event) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  Sock = SOCK_FROM_THIS (This);
> -
> -  return SockAccept (Sock, ListenToken);
> -}
> -
> -
> -/**
> -  Queues outgoing data into the transmit queue.
> -
> -  The Transmit() function queues a sending request to this TCPv4 instance along
> -  with the user data. The status of the token is updated and the event in the
> token
> -  will be signaled once the data is sent out or some error occurs.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance
> -  @param  Token                    Pointer to the completion token to queue to the
> -                                   transmit queue
> -
> -  @retval EFI_SUCCESS              The data has been queued for transmission.
> -  @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance hasn't
> been
> -                                   configured.
> -  @retval EFI_NO_MAPPING           When using a default address, configuration
> -                                   (DHCP, BOOTP, RARP, etc.) is not finished yet.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_ACCESS_DENIED        One or more of the following conditions is
> TRUE:
> -                                   * A transmit completion token with the same
> -                                     Token-> CompletionToken.Event was already in the
> -                                     transmission queue.
> -                                   * The current instance is in Tcp4StateClosed state
> -                                   * The current instance is a passive one and
> -                                     it is in Tcp4StateListen state.
> -                                   * User has called Close() to disconnect this
> -                                     connection.
> -  @retval EFI_NOT_READY            The completion token could not be queued
> because
> -                                   the transmit queue is full.
> -  @retval EFI_OUT_OF_RESOURCES     Could not queue the transmit data
> because of
> -                                   resource shortage.
> -  @retval EFI_NETWORK_UNREACHABLE  There is no route to the destination
> network or
> -                                   address.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Transmit (
> -  IN EFI_TCP4_PROTOCOL            *This,
> -  IN EFI_TCP4_IO_TOKEN            *Token
> -  )
> -{
> -  SOCKET      *Sock;
> -  EFI_STATUS  Status;
> -
> -  if (NULL == This ||
> -      NULL == Token ||
> -      NULL == Token->CompletionToken.Event ||
> -      NULL == Token->Packet.TxData ||
> -      0 == Token->Packet.TxData->FragmentCount ||
> -      0 == Token->Packet.TxData->DataLength
> -      ) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  Status = Tcp4ChkDataBuf (
> -            (UINT32) Token->Packet.TxData->DataLength,
> -            (UINT32) Token->Packet.TxData->FragmentCount,
> -            Token->Packet.TxData->FragmentTable
> -            );
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  Sock = SOCK_FROM_THIS (This);
> -
> -  return SockSend (Sock, Token);
> -
> -}
> -
> -
> -/**
> -  Place an asynchronous receive request into the receiving queue.
> -
> -  The Receive() function places a completion token into the receive packet
> queue.
> -  This function is always asynchronous. The caller must allocate the
> -  Token->CompletionToken.Event and the FragmentBuffer used to receive data.
> He also
> -  must fill the DataLength which represents the whole length of all
> FragmentBuffer.
> -  When the receive operation completes, the EFI TCPv4 Protocol driver updates
> the
> -  Token->CompletionToken.Status and Token->Packet.RxData fields and the
> -  Token->CompletionToken.Event is signaled. If got data the data and its length
> -  will be copy into the FragmentTable, in the same time the full length of
> received
> -  data will be recorded in the DataLength fields. Providing a proper notification
> -  function and context for the event will enable the user to receive the
> notification
> -  and receiving status. That notification function is guaranteed to not be re-
> entered.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  Token                    Pointer to a token that is associated with the
> -                                   receive data descriptor.
> -
> -  @retval EFI_SUCCESS              The receive completion token was cached.
> -  @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance hasn't
> been
> -                                   configured.
> -  @retval EFI_NO_MAPPING           When using a default address, configuration
> -                                   (DHCP, BOOTP, RARP, etc.) is not finished yet.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_OUT_OF_RESOURCES     The receive completion token could not
> be queued
> -                                   due to a lack of system resources.
> -  @retval EFI_DEVICE_ERROR         An unexpected system or network error
> occurred.
> -                                   The EFI TCPv4 Protocol instance has been reset
> -                                   to startup defaults.
> -  @retval EFI_ACCESS_DENIED        One or more of the following conditions is
> TRUE:
> -                                   * A receive completion token with the same
> -                                     Token->CompletionToken.Event was already in
> -                                     the receive queue.
> -                                   * The current instance is in Tcp4StateClosed state.
> -                                   * The current instance is a passive one and it
> -                                     is in Tcp4StateListen state.
> -                                   * User has called Close() to disconnect this
> -                                     connection.
> -  @retval EFI_CONNECTION_FIN       The communication peer has closed the
> connection
> -                                   and there is no any buffered data in the receive
> -                                   buffer of this instance.
> -  @retval EFI_NOT_READY            The receive request could not be queued
> because
> -                                   the receive queue is full.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Receive (
> -  IN EFI_TCP4_PROTOCOL           *This,
> -  IN EFI_TCP4_IO_TOKEN           *Token
> -  )
> -{
> -  SOCKET      *Sock;
> -  EFI_STATUS  Status;
> -
> -  if (NULL == This ||
> -      NULL == Token ||
> -      NULL == Token->CompletionToken.Event ||
> -      NULL == Token->Packet.RxData ||
> -      0 == Token->Packet.RxData->FragmentCount ||
> -      0 == Token->Packet.RxData->DataLength
> -      ) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  Status = Tcp4ChkDataBuf (
> -            (UINT32) Token->Packet.RxData->DataLength,
> -            (UINT32) Token->Packet.RxData->FragmentCount,
> -            Token->Packet.RxData->FragmentTable
> -            );
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  Sock = SOCK_FROM_THIS (This);
> -
> -  return SockRcv (Sock, Token);
> -
> -}
> -
> -
> -/**
> -  Disconnecting a TCP connection gracefully or reset a TCP connection.
> -
> -  Initiate an asynchronous close token to TCP driver. After Close() is called,
> -  any buffered transmission data will be sent by TCP driver and the current
> -  instance will have a graceful close working flow described as RFC 793 if
> -  AbortOnClose is set to FALSE, otherwise, a rest packet will be sent by TCP
> -  driver to fast disconnect this connection. When the close operation completes
> -  successfully the TCP instance is in Tcp4StateClosed state, all pending
> -  asynchronous operation is signaled and any buffers used for TCP network
> traffic
> -  is flushed.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  CloseToken               Pointer to the close token to return when
> -                                   operation finishes.
> -
> -  @retval EFI_SUCCESS              The operation completed successfully.
> -  @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance hasn't
> been
> -                                   configured.
> -  @retval EFI_ACCESS_DENIED        One or more of the following are TRUE:
> -                                   * Configure() has been called with TcpConfigData
> -                                     set to NULL and this function has not returned.
> -                                   * Previous Close() call on this instance has not
> -                                     finished.
> -  @retval EFI_INVALID_PARAMETER    One ore more parameters are invalid.
> -  @retval EFI_OUT_OF_RESOURCES     Could not allocate enough resource to
> finish the
> -                                   operation.
> -  @retval EFI_DEVICE_ERROR         Any unexpected and not belonged to above
> -                                   category error.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Close (
> -  IN EFI_TCP4_PROTOCOL           *This,
> -  IN EFI_TCP4_CLOSE_TOKEN        *CloseToken
> -  )
> -{
> -  SOCKET  *Sock;
> -
> -  if (NULL == This ||
> -      NULL == CloseToken ||
> -      NULL == CloseToken->CompletionToken.Event) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  Sock = SOCK_FROM_THIS (This);
> -
> -  return SockClose (Sock, CloseToken, CloseToken->AbortOnClose);
> -}
> -
> -
> -/**
> -  Abort an asynchronous connection, listen, transmission or receive request.
> -
> -  The Cancel() function aborts a pending connection, listen, transmit or receive
> -  request. If Token is not NULL and the token is in the connection, listen,
> -  transmission or receive queue when it is being cancelled, its Token->Status
> -  will be set to EFI_ABORTED and then Token->Event will be signaled. If the
> token
> -  is not in one of the queues, which usually means that the asynchronous
> operation
> -  has completed, EFI_NOT_FOUND is returned. If Token is NULL all
> asynchronous token
> -  issued by Connect(), Accept(), Transmit() and Receive()will be aborted.
> -  NOTE: It has not been implemented currently.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  Token                    Pointer to a token that has been issued by
> -                                   Connect(), Accept(), Transmit() or Receive(). If
> -                                   NULL, all pending tokens issued by above four
> -                                   functions will be aborted.
> -
> -  @retval  EFI_SUCCESS             The asynchronous I/O request is aborted and
> Token->Event
> -                                   is signaled.
> -  @retval  EFI_INVALID_PARAMETER   This is NULL.
> -  @retval  EFI_NOT_STARTED         This instance hasn's been configured.
> -  @retval  EFI_NO_MAPPING          When using the default address,
> configuration
> -                                   (DHCP, BOOTP,RARP, etc.) hasn's finished yet.
> -  @retval  EFI_NOT_FOUND           The asynchronous I/O request isn's found in
> the
> -                                   transmission or receive queue. It has either
> -                                   completed or wasn's issued by Transmit() and Receive().
> -  @retval  EFI_UNSUPPORTED         The operation is not supported in current
> -                                   implementation.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Cancel (
> -  IN EFI_TCP4_PROTOCOL           *This,
> -  IN EFI_TCP4_COMPLETION_TOKEN   *Token    OPTIONAL
> -  )
> -{
> -  return EFI_UNSUPPORTED;
> -}
> -
> -
> -/**
> -  Poll to receive incoming data and transmit outgoing segments.
> -
> -  The Poll() function increases the rate that data is moved between the network
> -  and application and can be called when the TCP instance is created
> successfully.
> -  Its use is optional. In some implementations, the periodical timer in the MNP
> -  driver may not poll the underlying communications device fast enough to
> avoid
> -  drop packets. Drivers and applications that are experiencing packet loss should
> -  try calling the Poll() function in a high frequency.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -
> -  @retval EFI_SUCCESS              Incoming or outgoing data was processed.
> -  @retval EFI_INVALID_PARAMETER    This is NULL.
> -  @retval EFI_DEVICE_ERROR         An unexpected system or network error
> occurred.
> -  @retval EFI_NOT_READY            No incoming or outgoing data was processed.
> -  @retval EFI_TIMEOUT              Data was dropped out of the transmission or
> -                                   receive queue. Consider increasing the polling
> -                                   rate.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Poll (
> -  IN EFI_TCP4_PROTOCOL        *This
> -  )
> -{
> -  SOCKET      *Sock;
> -  EFI_STATUS  Status;
> -
> -  if (NULL == This) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  Sock    = SOCK_FROM_THIS (This);
> -
> -  Status  = Sock->ProtoHandler (Sock, SOCK_POLL, NULL);
> -
> -  return Status;
> -}
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c
> deleted file mode 100644
> index 7fd8bb1fbe09..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c
> +++ /dev/null
> @@ -1,940 +0,0 @@
> -/** @file
> -  Misc support routines for tcp.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -
> -#include "Tcp4Main.h"
> -
> -#include <Library/DevicePathLib.h>
> -
> -LIST_ENTRY      mTcpRunQue = {
> -  &mTcpRunQue,
> -  &mTcpRunQue
> -};
> -
> -LIST_ENTRY      mTcpListenQue = {
> -  &mTcpListenQue,
> -  &mTcpListenQue
> -};
> -
> -TCP_SEQNO       mTcpGlobalIss = 0x4d7e980b;
> -
> -CHAR16   *mTcpStateName[] = {
> -  L"TCP_CLOSED",
> -  L"TCP_LISTEN",
> -  L"TCP_SYN_SENT",
> -  L"TCP_SYN_RCVD",
> -  L"TCP_ESTABLISHED",
> -  L"TCP_FIN_WAIT_1",
> -  L"TCP_FIN_WAIT_2",
> -  L"TCP_CLOSING",
> -  L"TCP_TIME_WAIT",
> -  L"TCP_CLOSE_WAIT",
> -  L"TCP_LAST_ACK"
> -};
> -
> -
> -/**
> -  Initialize the Tcb local related members.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpInitTcbLocal (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  //
> -  // Compute the checksum of the fixed parts of pseudo header
> -  //
> -  Tcb->HeadSum = NetPseudoHeadChecksum (
> -                  Tcb->LocalEnd.Ip,
> -                  Tcb->RemoteEnd.Ip,
> -                  0x06,
> -                  0
> -                  );
> -
> -  Tcb->Iss    = TcpGetIss ();
> -  Tcb->SndUna = Tcb->Iss;
> -  Tcb->SndNxt = Tcb->Iss;
> -
> -  Tcb->SndWl2 = Tcb->Iss;
> -  Tcb->SndWnd = 536;
> -
> -  Tcb->RcvWnd = GET_RCV_BUFFSIZE (Tcb->Sk);
> -
> -  //
> -  // First window size is never scaled
> -  //
> -  Tcb->RcvWndScale  = 0;
> -  Tcb->RetxmitSeqMax = 0;
> -
> -  Tcb->ProbeTimerOn = FALSE;
> -}
> -
> -
> -/**
> -  Initialize the peer related members.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -  @param  Seg                   Pointer to the segment that contains the peer's
> -                                intial info.
> -  @param  Opt                   Pointer to the options announced by the peer.
> -
> -**/
> -VOID
> -TcpInitTcbPeer (
> -  IN OUT TCP_CB     *Tcb,
> -  IN     TCP_SEG    *Seg,
> -  IN     TCP_OPTION *Opt
> -  )
> -{
> -  UINT16  RcvMss;
> -
> -  ASSERT ((Tcb != NULL) && (Seg != NULL) && (Opt != NULL));
> -  ASSERT (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN));
> -
> -  Tcb->SndWnd     = Seg->Wnd;
> -  Tcb->SndWndMax  = Tcb->SndWnd;
> -  Tcb->SndWl1     = Seg->Seq;
> -
> -  if (TCP_FLG_ON (Seg->Flag, TCP_FLG_ACK)) {
> -    Tcb->SndWl2 = Seg->Ack;
> -  } else {
> -    Tcb->SndWl2 = Tcb->Iss + 1;
> -  }
> -
> -  if (TCP_FLG_ON (Opt->Flag, TCP_OPTION_RCVD_MSS)) {
> -    Tcb->SndMss = (UINT16) MAX (64, Opt->Mss);
> -
> -    RcvMss = TcpGetRcvMss (Tcb->Sk);
> -    if (Tcb->SndMss > RcvMss) {
> -      Tcb->SndMss = RcvMss;
> -    }
> -
> -  } else {
> -    //
> -    // One end doesn't support MSS option, use default.
> -    //
> -    Tcb->RcvMss = 536;
> -  }
> -
> -  Tcb->CWnd   = Tcb->SndMss;
> -
> -  Tcb->Irs    = Seg->Seq;
> -  Tcb->RcvNxt = Tcb->Irs + 1;
> -
> -  Tcb->RcvWl2 = Tcb->RcvNxt;
> -
> -  if (TCP_FLG_ON (Opt->Flag, TCP_OPTION_RCVD_WS) &&
> -      !TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_WS)) {
> -
> -    Tcb->SndWndScale  = Opt->WndScale;
> -
> -    Tcb->RcvWndScale  = TcpComputeScale (Tcb);
> -    TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_RCVD_WS);
> -
> -  } else {
> -    //
> -    // One end doesn't support window scale option. use zero.
> -    //
> -    Tcb->RcvWndScale = 0;
> -  }
> -
> -  if (TCP_FLG_ON (Opt->Flag, TCP_OPTION_RCVD_TS) &&
> -      !TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_TS)) {
> -
> -    TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_TS);
> -    TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_RCVD_TS);
> -
> -    Tcb->TsRecent = Opt->TSVal;
> -
> -    //
> -    // Compute the effective SndMss per RFC1122
> -    // section 4.2.2.6. If timestamp option is
> -    // enabled, it will always occupy 12 bytes.
> -    //
> -    Tcb->SndMss -= TCP_OPTION_TS_ALIGNED_LEN;
> -  }
> -}
> -
> -
> -/**
> -  Locate a listen TCB that matchs the Local and Remote.
> -
> -  @param  Local                 Pointer to the local (IP, Port).
> -  @param  Remote                Pointer to the remote (IP, Port).
> -
> -  @return  Pointer to the TCP_CB with the least number of wildcard,
> -           if NULL no match is found.
> -
> -**/
> -TCP_CB *
> -TcpLocateListenTcb (
> -  IN TCP_PEER *Local,
> -  IN TCP_PEER *Remote
> -  )
> -{
> -  LIST_ENTRY      *Entry;
> -  TCP_CB          *Node;
> -  TCP_CB          *Match;
> -  INTN            Last;
> -  INTN            Cur;
> -
> -  Last  = 4;
> -  Match = NULL;
> -
> -  NET_LIST_FOR_EACH (Entry, &mTcpListenQue) {
> -    Node = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);
> -
> -    if ((Local->Port != Node->LocalEnd.Port) ||
> -        !TCP_PEER_MATCH (Remote, &Node->RemoteEnd) ||
> -        !TCP_PEER_MATCH (Local, &Node->LocalEnd)) {
> -
> -      continue;
> -    }
> -
> -    //
> -    // Compute the number of wildcard
> -    //
> -    Cur = 0;
> -    if (Node->RemoteEnd.Ip == 0) {
> -      Cur++;
> -    }
> -
> -    if (Node->RemoteEnd.Port == 0) {
> -      Cur++;
> -    }
> -
> -    if (Node->LocalEnd.Ip == 0) {
> -      Cur++;
> -    }
> -
> -    if (Cur < Last) {
> -      if (Cur == 0) {
> -        return Node;
> -      }
> -
> -      Last  = Cur;
> -      Match = Node;
> -    }
> -  }
> -
> -  return Match;
> -}
> -
> -
> -/**
> -  Try to find one Tcb whose <Ip, Port> equals to <IN Addr, IN Port>.
> -
> -  @param  Addr                  Pointer to the IP address needs to match.
> -  @param  Port                  The port number needs to match.
> -
> -  @return  The Tcb which matches the <Addr Port> paire exists or not.
> -
> -**/
> -BOOLEAN
> -TcpFindTcbByPeer (
> -  IN EFI_IPv4_ADDRESS  *Addr,
> -  IN TCP_PORTNO        Port
> -  )
> -{
> -  TCP_PORTNO      LocalPort;
> -  LIST_ENTRY      *Entry;
> -  TCP_CB          *Tcb;
> -
> -  ASSERT ((Addr != NULL) && (Port != 0));
> -
> -  LocalPort = HTONS (Port);
> -
> -  NET_LIST_FOR_EACH (Entry, &mTcpListenQue) {
> -    Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);
> -
> -    if (EFI_IP4_EQUAL (Addr, &Tcb->LocalEnd.Ip) &&
> -      (LocalPort == Tcb->LocalEnd.Port)) {
> -
> -      return TRUE;
> -    }
> -  }
> -
> -  NET_LIST_FOR_EACH (Entry, &mTcpRunQue) {
> -    Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);
> -
> -    if (EFI_IP4_EQUAL (Addr, &Tcb->LocalEnd.Ip) &&
> -      (LocalPort == Tcb->LocalEnd.Port)) {
> -
> -      return TRUE;
> -    }
> -  }
> -
> -  return FALSE;
> -}
> -
> -
> -/**
> -  Locate the TCP_CB related to the socket pair.
> -
> -  @param  LocalPort             The local port number.
> -  @param  LocalIp               The local IP address.
> -  @param  RemotePort            The remote port number.
> -  @param  RemoteIp              The remote IP address.
> -  @param  Syn                   Whether to search the listen sockets, if TRUE, the
> -                                listen sockets are searched.
> -
> -  @return  Pointer to the related TCP_CB, if NULL no match is found.
> -
> -**/
> -TCP_CB *
> -TcpLocateTcb (
> -  IN TCP_PORTNO  LocalPort,
> -  IN UINT32      LocalIp,
> -  IN TCP_PORTNO  RemotePort,
> -  IN UINT32      RemoteIp,
> -  IN BOOLEAN     Syn
> -  )
> -{
> -  TCP_PEER        Local;
> -  TCP_PEER        Remote;
> -  LIST_ENTRY      *Entry;
> -  TCP_CB          *Tcb;
> -
> -  Local.Port  = LocalPort;
> -  Local.Ip    = LocalIp;
> -
> -  Remote.Port = RemotePort;
> -  Remote.Ip   = RemoteIp;
> -
> -  //
> -  // First check for exact match.
> -  //
> -  NET_LIST_FOR_EACH (Entry, &mTcpRunQue) {
> -    Tcb = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);
> -
> -    if (TCP_PEER_EQUAL (&Remote, &Tcb->RemoteEnd) &&
> -        TCP_PEER_EQUAL (&Local, &Tcb->LocalEnd)) {
> -
> -      RemoveEntryList (&Tcb->List);
> -      InsertHeadList (&mTcpRunQue, &Tcb->List);
> -
> -      return Tcb;
> -    }
> -  }
> -
> -  //
> -  // Only check listen queue when SYN flag is on
> -  //
> -  if (Syn) {
> -    return TcpLocateListenTcb (&Local, &Remote);
> -  }
> -
> -  return NULL;
> -}
> -
> -
> -/**
> -  Insert a Tcb into the proper queue.
> -
> -  @param  Tcb                   Pointer to the TCP_CB to be inserted.
> -
> -  @retval 0                     The Tcb is inserted successfully.
> -  @retval -1                    Error condition occurred.
> -
> -**/
> -INTN
> -TcpInsertTcb (
> -  IN TCP_CB *Tcb
> -  )
> -{
> -  LIST_ENTRY       *Entry;
> -  LIST_ENTRY       *Head;
> -  TCP_CB           *Node;
> -
> -  ASSERT (
> -    (Tcb != NULL) &&
> -    ((Tcb->State == TCP_LISTEN) ||
> -     (Tcb->State == TCP_SYN_SENT) ||
> -     (Tcb->State == TCP_SYN_RCVD) ||
> -     (Tcb->State == TCP_CLOSED))
> -    );
> -
> -  if (Tcb->LocalEnd.Port == 0) {
> -    return -1;
> -  }
> -
> -  Head = &mTcpRunQue;
> -
> -  if (Tcb->State == TCP_LISTEN) {
> -    Head = &mTcpListenQue;
> -  }
> -
> -  //
> -  // Check that Tcb isn't already on the list.
> -  //
> -  NET_LIST_FOR_EACH (Entry, Head) {
> -    Node = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);
> -
> -    if (TCP_PEER_EQUAL (&Tcb->LocalEnd, &Node->LocalEnd) &&
> -        TCP_PEER_EQUAL (&Tcb->RemoteEnd, &Node->RemoteEnd)) {
> -
> -      return -1;
> -    }
> -  }
> -
> -  InsertHeadList (Head, &Tcb->List);
> -
> -  return 0;
> -}
> -
> -
> -/**
> -  Clone a TCB_CB from Tcb.
> -
> -  @param  Tcb                   Pointer to the TCP_CB to be cloned.
> -
> -  @return  Pointer to the new cloned TCP_CB, if NULL error condition occurred.
> -
> -**/
> -TCP_CB *
> -TcpCloneTcb (
> -  IN TCP_CB *Tcb
> -  )
> -{
> -  TCP_CB               *Clone;
> -
> -  Clone = AllocatePool (sizeof (TCP_CB));
> -
> -  if (Clone == NULL) {
> -    return NULL;
> -
> -  }
> -
> -  CopyMem (Clone, Tcb, sizeof (TCP_CB));
> -
> -  //
> -  // Increate the reference count of the shared IpInfo.
> -  //
> -  NET_GET_REF (Tcb->IpInfo);
> -
> -  InitializeListHead (&Clone->List);
> -  InitializeListHead (&Clone->SndQue);
> -  InitializeListHead (&Clone->RcvQue);
> -
> -  Clone->Sk = SockClone (Tcb->Sk);
> -  if (Clone->Sk == NULL) {
> -    DEBUG ((EFI_D_ERROR, "TcpCloneTcb: failed to clone a sock\n"));
> -    FreePool (Clone);
> -    return NULL;
> -  }
> -
> -  ((TCP4_PROTO_DATA *) (Clone->Sk->ProtoReserved))->TcpPcb = Clone;
> -
> -  return Clone;
> -}
> -
> -
> -/**
> -  Compute an ISS to be used by a new connection.
> -
> -  @return  The result ISS.
> -
> -**/
> -TCP_SEQNO
> -TcpGetIss (
> -  VOID
> -  )
> -{
> -  mTcpGlobalIss += 2048;
> -  return mTcpGlobalIss;
> -}
> -
> -
> -/**
> -  Get the local mss.
> -
> -  @param  Sock        Pointer to the socket to get mss
> -
> -  @return  The mss size.
> -
> -**/
> -UINT16
> -TcpGetRcvMss (
> -  IN SOCKET  *Sock
> -  )
> -{
> -  EFI_IP4_MODE_DATA       Ip4Mode;
> -  TCP4_PROTO_DATA         *TcpProto;
> -  EFI_IP4_PROTOCOL        *Ip;
> -
> -  ASSERT (Sock != NULL);
> -
> -  TcpProto = (TCP4_PROTO_DATA *) Sock->ProtoReserved;
> -  Ip       = TcpProto->TcpService->IpIo->Ip.Ip4;
> -  ASSERT (Ip != NULL);
> -
> -  Ip->GetModeData (Ip, &Ip4Mode, NULL, NULL);
> -
> -  return (UINT16) (Ip4Mode.MaxPacketSize - sizeof (TCP_HEAD));
> -}
> -
> -
> -/**
> -  Set the Tcb's state.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -  @param  State                 The state to be set.
> -
> -**/
> -VOID
> -TcpSetState (
> -  IN OUT TCP_CB  *Tcb,
> -  IN     UINT8   State
> -  )
> -{
> -  ASSERT (Tcb->State < (sizeof (mTcpStateName) / sizeof (CHAR16 *)));
> -  ASSERT (State < (sizeof (mTcpStateName) / sizeof (CHAR16 *)));
> -
> -  DEBUG (
> -    (EFI_D_NET,
> -    "Tcb (%p) state %s --> %s\n",
> -    Tcb,
> -    mTcpStateName[Tcb->State],
> -    mTcpStateName[State])
> -    );
> -
> -  Tcb->State = State;
> -
> -  switch (State) {
> -  case TCP_ESTABLISHED:
> -
> -    SockConnEstablished (Tcb->Sk);
> -
> -    if (Tcb->Parent != NULL) {
> -      //
> -      // A new connection is accepted by a listening socket, install
> -      // the device path.
> -      //
> -      TcpInstallDevicePath (Tcb->Sk);
> -    }
> -
> -    break;
> -
> -  case TCP_CLOSED:
> -
> -    SockConnClosed (Tcb->Sk);
> -
> -    break;
> -  default:
> -    break;
> -  }
> -}
> -
> -
> -/**
> -  Compute the TCP segment's checksum.
> -
> -  @param  Nbuf                  Pointer to the buffer that contains the TCP
> -                                segment.
> -  @param  HeadSum               The checksum value of the fixed part of pseudo
> -                                header.
> -
> -  @return  The checksum value.
> -
> -**/
> -UINT16
> -TcpChecksum (
> -  IN NET_BUF *Nbuf,
> -  IN UINT16  HeadSum
> -  )
> -{
> -  UINT16  Checksum;
> -
> -  Checksum  = NetbufChecksum (Nbuf);
> -  Checksum  = NetAddChecksum (Checksum, HeadSum);
> -
> -  Checksum  = NetAddChecksum (
> -                Checksum,
> -                HTONS ((UINT16) Nbuf->TotalSize)
> -                );
> -
> -  return (UINT16) ~Checksum;
> -}
> -
> -/**
> -  Translate the information from the head of the received TCP
> -  segment Nbuf contains and fill it into a TCP_SEG structure.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf                  Pointer to the buffer contains the TCP segment.
> -
> -  @return  Pointer to the TCP_SEG that contains the translated TCP head
> information.
> -
> -**/
> -TCP_SEG *
> -TcpFormatNetbuf (
> -  IN     TCP_CB  *Tcb,
> -  IN OUT NET_BUF *Nbuf
> -  )
> -{
> -  TCP_SEG   *Seg;
> -  TCP_HEAD  *Head;
> -
> -  Seg       = TCPSEG_NETBUF (Nbuf);
> -  Head      = (TCP_HEAD *) NetbufGetByte (Nbuf, 0, NULL);
> -  ASSERT (Head != NULL);
> -  Nbuf->Tcp = Head;
> -
> -  Seg->Seq  = NTOHL (Head->Seq);
> -  Seg->Ack  = NTOHL (Head->Ack);
> -  Seg->End  = Seg->Seq + (Nbuf->TotalSize - (Head->HeadLen << 2));
> -
> -  Seg->Urg  = NTOHS (Head->Urg);
> -  Seg->Wnd  = (NTOHS (Head->Wnd) << Tcb->SndWndScale);
> -  Seg->Flag = Head->Flag;
> -
> -  //
> -  // SYN and FIN flag occupy one sequence space each.
> -  //
> -  if (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN)) {
> -    //
> -    // RFC requires that initial window not be scaled
> -    //
> -    Seg->Wnd = NTOHS (Head->Wnd);
> -    Seg->End++;
> -  }
> -
> -  if (TCP_FLG_ON (Seg->Flag, TCP_FLG_FIN)) {
> -    Seg->End++;
> -  }
> -
> -  return Seg;
> -}
> -
> -
> -/**
> -  Reset the connection related with Tcb.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of the connection to be
> -                                reset.
> -
> -**/
> -VOID
> -TcpResetConnection (
> -  IN TCP_CB *Tcb
> -  )
> -{
> -  NET_BUF   *Nbuf;
> -  TCP_HEAD  *Nhead;
> -
> -  Nbuf = NetbufAlloc (TCP_MAX_HEAD);
> -
> -  if (Nbuf == NULL) {
> -    return ;
> -  }
> -
> -  Nhead = (TCP_HEAD *) NetbufAllocSpace (
> -                        Nbuf,
> -                        sizeof (TCP_HEAD),
> -                        NET_BUF_TAIL
> -                        );
> -
> -  ASSERT (Nhead != NULL);
> -
> -  Nbuf->Tcp       = Nhead;
> -
> -  Nhead->Flag     = TCP_FLG_RST;
> -  Nhead->Seq      = HTONL (Tcb->SndNxt);
> -  Nhead->Ack      = HTONL (Tcb->RcvNxt);
> -  Nhead->SrcPort  = Tcb->LocalEnd.Port;
> -  Nhead->DstPort  = Tcb->RemoteEnd.Port;
> -  Nhead->HeadLen  = (UINT8) (sizeof (TCP_HEAD) >> 2);
> -  Nhead->Res      = 0;
> -  Nhead->Wnd      = HTONS (0xFFFF);
> -  Nhead->Checksum = 0;
> -  Nhead->Urg      = 0;
> -  Nhead->Checksum = TcpChecksum (Nbuf, Tcb->HeadSum);
> -
> -  TcpSendIpPacket (Tcb, Nbuf, Tcb->LocalEnd.Ip, Tcb->RemoteEnd.Ip);
> -
> -  NetbufFree (Nbuf);
> -}
> -
> -
> -/**
> -  Initialize an active connection.
> -
> -  @param  Tcb                   Pointer to the TCP_CB that wants to initiate a
> -                                connection.
> -
> -**/
> -VOID
> -TcpOnAppConnect (
> -  IN OUT TCP_CB  *Tcb
> -  )
> -{
> -  TcpInitTcbLocal (Tcb);
> -  TcpSetState (Tcb, TCP_SYN_SENT);
> -
> -  TcpSetTimer (Tcb, TCP_TIMER_CONNECT, Tcb->ConnectTimeout);
> -  TcpToSendData (Tcb, 1);
> -}
> -
> -
> -/**
> -  Initiate the connection close procedure, called when
> -  applications want to close the connection.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpOnAppClose (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  ASSERT (Tcb != NULL);
> -
> -  if (!IsListEmpty (&Tcb->RcvQue) || GET_RCV_DATASIZE (Tcb->Sk) != 0) {
> -
> -    DEBUG ((EFI_D_WARN, "TcpOnAppClose: connection reset "
> -      "because data is lost for TCB %p\n", Tcb));
> -
> -    TcpResetConnection (Tcb);
> -    TcpClose (Tcb);
> -    return;
> -  }
> -
> -  switch (Tcb->State) {
> -  case TCP_CLOSED:
> -  case TCP_LISTEN:
> -  case TCP_SYN_SENT:
> -    TcpSetState (Tcb, TCP_CLOSED);
> -    break;
> -
> -  case TCP_SYN_RCVD:
> -  case TCP_ESTABLISHED:
> -    TcpSetState (Tcb, TCP_FIN_WAIT_1);
> -    break;
> -
> -  case TCP_CLOSE_WAIT:
> -    TcpSetState (Tcb, TCP_LAST_ACK);
> -    break;
> -  default:
> -    break;
> -  }
> -
> -  TcpToSendData (Tcb, 1);
> -}
> -
> -
> -/**
> -  Check whether the application's newly delivered data can be sent out.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -
> -  @retval 0                     Whether the data is sent out or is buffered for
> -                                further sending.
> -  @retval -1                    The Tcb is not in a state that data is permitted to
> -                                be sent out.
> -
> -**/
> -INTN
> -TcpOnAppSend (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -
> -  switch (Tcb->State) {
> -  case TCP_CLOSED:
> -    return -1;
> -
> -  case TCP_LISTEN:
> -    return -1;
> -
> -  case TCP_SYN_SENT:
> -  case TCP_SYN_RCVD:
> -    return 0;
> -
> -  case TCP_ESTABLISHED:
> -  case TCP_CLOSE_WAIT:
> -    TcpToSendData (Tcb, 0);
> -    return 0;
> -
> -  case TCP_FIN_WAIT_1:
> -  case TCP_FIN_WAIT_2:
> -  case TCP_CLOSING:
> -  case TCP_LAST_ACK:
> -  case TCP_TIME_WAIT:
> -    return -1;
> -
> -  default:
> -    break;
> -  }
> -
> -  return 0;
> -}
> -
> -
> -/**
> -  Application has consumed some data, check whether
> -  to send a window updata ack or a delayed ack.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpOnAppConsume (
> -  IN TCP_CB *Tcb
> -  )
> -{
> -  UINT32 TcpOld;
> -
> -  switch (Tcb->State) {
> -  case TCP_CLOSED:
> -    return;
> -
> -  case TCP_LISTEN:
> -    return;
> -
> -  case TCP_SYN_SENT:
> -  case TCP_SYN_RCVD:
> -    return;
> -
> -  case TCP_ESTABLISHED:
> -    TcpOld = TcpRcvWinOld (Tcb);
> -    if (TcpRcvWinNow (Tcb) > TcpOld) {
> -
> -      if (TcpOld < Tcb->RcvMss) {
> -
> -        DEBUG ((EFI_D_NET, "TcpOnAppConsume: send a window"
> -          " update for a window closed Tcb %p\n", Tcb));
> -
> -        TcpSendAck (Tcb);
> -      } else if (Tcb->DelayedAck == 0) {
> -
> -        DEBUG ((EFI_D_NET, "TcpOnAppConsume: scheduled a delayed"
> -          " ACK to update window for Tcb %p\n", Tcb));
> -
> -        Tcb->DelayedAck = 1;
> -      }
> -    }
> -
> -    break;
> -
> -  case TCP_CLOSE_WAIT:
> -    return;
> -
> -  case TCP_FIN_WAIT_1:
> -  case TCP_FIN_WAIT_2:
> -  case TCP_CLOSING:
> -  case TCP_LAST_ACK:
> -  case TCP_TIME_WAIT:
> -    return;
> -
> -  default:
> -    break;
> -  }
> -}
> -
> -
> -/**
> -  Abort the connection by sending a reset segment, called
> -  when the application wants to abort the connection.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of the TCP instance.
> -
> -**/
> -VOID
> -TcpOnAppAbort (
> -  IN TCP_CB *Tcb
> -  )
> -{
> -  DEBUG ((EFI_D_WARN, "TcpOnAppAbort: connection reset "
> -    "issued by application for TCB %p\n", Tcb));
> -
> -  switch (Tcb->State) {
> -  case TCP_SYN_RCVD:
> -  case TCP_ESTABLISHED:
> -  case TCP_FIN_WAIT_1:
> -  case TCP_FIN_WAIT_2:
> -  case TCP_CLOSE_WAIT:
> -    TcpResetConnection (Tcb);
> -    break;
> -  default:
> -    break;
> -  }
> -
> -  TcpSetState (Tcb, TCP_CLOSED);
> -}
> -
> -/**
> -  Install the device path protocol on the TCP instance.
> -
> -  @param  Sock             Pointer to the socket representing the TCP instance.
> -
> -  @retval  EFI_SUCCESS     The device path protocol is installed.
> -  @retval  other           Failed to install the device path protocol.
> -
> -**/
> -EFI_STATUS
> -TcpInstallDevicePath (
> -  IN SOCKET *Sock
> -  )
> -{
> -  TCP4_PROTO_DATA    *TcpProto;
> -  TCP4_SERVICE_DATA  *TcpService;
> -  TCP_CB             *Tcb;
> -  IPv4_DEVICE_PATH   Ip4DPathNode;
> -  EFI_STATUS         Status;
> -  TCP_PORTNO         LocalPort;
> -  TCP_PORTNO         RemotePort;
> -
> -  TcpProto   = (TCP4_PROTO_DATA *) Sock->ProtoReserved;
> -  TcpService = TcpProto->TcpService;
> -  Tcb        = TcpProto->TcpPcb;
> -
> -  LocalPort = NTOHS (Tcb->LocalEnd.Port);
> -  RemotePort = NTOHS (Tcb->RemoteEnd.Port);
> -  NetLibCreateIPv4DPathNode (
> -    &Ip4DPathNode,
> -    TcpService->ControllerHandle,
> -    Tcb->LocalEnd.Ip,
> -    LocalPort,
> -    Tcb->RemoteEnd.Ip,
> -    RemotePort,
> -    EFI_IP_PROTO_TCP,
> -    Tcb->UseDefaultAddr
> -    );
> -
> -  IP4_COPY_ADDRESS (&Ip4DPathNode.SubnetMask, &Tcb->SubnetMask);
> -
> -  Sock->DevicePath = AppendDevicePathNode (
> -                       Sock->ParentDevicePath,
> -                       (EFI_DEVICE_PATH_PROTOCOL *) &Ip4DPathNode
> -                       );
> -  if (Sock->DevicePath == NULL) {
> -    return EFI_OUT_OF_RESOURCES;
> -  }
> -
> -  Status = gBS->InstallProtocolInterface (
> -                  &Sock->SockHandle,
> -                  &gEfiDevicePathProtocolGuid,
> -                  EFI_NATIVE_INTERFACE,
> -                  Sock->DevicePath
> -                  );
> -  if (EFI_ERROR (Status)) {
> -    FreePool (Sock->DevicePath);
> -  }
> -
> -  return Status;
> -}
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.c
> deleted file mode 100644
> index e84310f6c693..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.c
> +++ /dev/null
> @@ -1,352 +0,0 @@
> -/** @file
> -  Routines to process TCP option.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#include "Tcp4Main.h"
> -
> -/**
> -    Get a UINT16 value from buffer.
> -
> -    @param Buf                  Pointer to input buffer.
> -
> -    @return                     The UINT16 value get from buffer.
> -
> -**/
> -UINT16
> -TcpGetUint16 (
> -  IN UINT8 *Buf
> -  )
> -{
> -  UINT16  Value;
> -  CopyMem (&Value, Buf, sizeof (UINT16));
> -  return NTOHS (Value);
> -}
> -
> -/**
> -    Get a UINT32 value from buffer.
> -
> -    @param Buf                  Pointer to input buffer.
> -
> -    @return                     The UINT32 value get from buffer.
> -
> -**/
> -UINT32
> -TcpGetUint32 (
> -  IN UINT8 *Buf
> -  )
> -{
> -  UINT32  Value;
> -  CopyMem (&Value, Buf, sizeof (UINT32));
> -  return NTOHL (Value);
> -}
> -
> -/**
> -    Put a UINT32 value in buffer.
> -
> -    @param Buf                  Pointer to the buffer.
> -    @param Data                 The UINT32 Date to put in buffer
> -
> -**/
> -VOID
> -TcpPutUint32 (
> -     OUT UINT8  *Buf,
> -  IN     UINT32 Data
> -  )
> -{
> -  Data = HTONL (Data);
> -  CopyMem (Buf, &Data, sizeof (UINT32));
> -}
> -
> -
> -/**
> -  Compute the window scale value according to the given buffer size.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -  @return         The scale value.
> -
> -**/
> -UINT8
> -TcpComputeScale (
> -  IN TCP_CB *Tcb
> -  )
> -{
> -  UINT8   Scale;
> -  UINT32  BufSize;
> -
> -  ASSERT ((Tcb != NULL) && (Tcb->Sk != NULL));
> -
> -  BufSize = GET_RCV_BUFFSIZE (Tcb->Sk);
> -
> -  Scale   = 0;
> -  while ((Scale < TCP_OPTION_MAX_WS) &&
> -         ((UINT32) (TCP_OPTION_MAX_WIN << Scale) < BufSize)) {
> -
> -    Scale++;
> -  }
> -
> -  return Scale;
> -}
> -
> -
> -/**
> -  Build the TCP option in three-way handshake.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf    Pointer to the buffer to store the options.
> -
> -  @return         The total length of the TCP option field.
> -
> -**/
> -UINT16
> -TcpSynBuildOption (
> -  IN TCP_CB  *Tcb,
> -  IN NET_BUF *Nbuf
> -  )
> -{
> -  UINT8   *Data;
> -  UINT16  Len;
> -
> -  ASSERT ((Tcb != NULL) && (Nbuf != NULL) && (Nbuf->Tcp == NULL));
> -
> -  Len = 0;
> -
> -  //
> -  // Add timestamp option if not disabled by application
> -  // and it is the first SYN segment or the peer has sent
> -  // us its timestamp.
> -  //
> -  if (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_TS) &&
> -      (!TCP_FLG_ON (TCPSEG_NETBUF (Nbuf)->Flag, TCP_FLG_ACK) ||
> -        TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RCVD_TS))) {
> -
> -    Data = NetbufAllocSpace (
> -            Nbuf,
> -            TCP_OPTION_TS_ALIGNED_LEN,
> -            NET_BUF_HEAD
> -            );
> -
> -    ASSERT (Data != NULL);
> -    Len += TCP_OPTION_TS_ALIGNED_LEN;
> -
> -    TcpPutUint32 (Data, TCP_OPTION_TS_FAST);
> -    TcpPutUint32 (Data + 4, mTcpTick);
> -    TcpPutUint32 (Data + 8, 0);
> -  }
> -
> -  //
> -  // Build window scale option, only when are configured
> -  // to send WS option, and either we are doing active
> -  // open or we have received WS option from peer.
> -  //
> -  if (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_WS) &&
> -      (!TCP_FLG_ON (TCPSEG_NETBUF (Nbuf)->Flag, TCP_FLG_ACK) ||
> -        TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RCVD_WS))) {
> -
> -    Data = NetbufAllocSpace (
> -            Nbuf,
> -            TCP_OPTION_WS_ALIGNED_LEN,
> -            NET_BUF_HEAD
> -            );
> -
> -    ASSERT (Data != NULL);
> -
> -    Len += TCP_OPTION_WS_ALIGNED_LEN;
> -    TcpPutUint32 (Data, TCP_OPTION_WS_FAST | TcpComputeScale (Tcb));
> -  }
> -
> -  //
> -  // Build MSS option
> -  //
> -  Data = NetbufAllocSpace (Nbuf, TCP_OPTION_MSS_LEN, 1);
> -  ASSERT (Data != NULL);
> -
> -  Len += TCP_OPTION_MSS_LEN;
> -  TcpPutUint32 (Data, TCP_OPTION_MSS_FAST | Tcb->RcvMss);
> -
> -  return Len;
> -}
> -
> -
> -/**
> -  Build the TCP option in synchronized states.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf    Pointer to the buffer to store the options.
> -
> -  @return         The total length of the TCP option field.
> -
> -**/
> -UINT16
> -TcpBuildOption (
> -  IN TCP_CB  *Tcb,
> -  IN NET_BUF *Nbuf
> -  )
> -{
> -  UINT8   *Data;
> -  UINT16  Len;
> -
> -  ASSERT ((Tcb != NULL) && (Nbuf != NULL) && (Nbuf->Tcp == NULL));
> -  Len = 0;
> -
> -  //
> -  // Build Timestamp option
> -  //
> -  if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_SND_TS) &&
> -      !TCP_FLG_ON (TCPSEG_NETBUF (Nbuf)->Flag, TCP_FLG_RST)) {
> -
> -    Data = NetbufAllocSpace (
> -            Nbuf,
> -            TCP_OPTION_TS_ALIGNED_LEN,
> -            NET_BUF_HEAD
> -            );
> -
> -    ASSERT (Data != NULL);
> -    Len += TCP_OPTION_TS_ALIGNED_LEN;
> -
> -    TcpPutUint32 (Data, TCP_OPTION_TS_FAST);
> -    TcpPutUint32 (Data + 4, mTcpTick);
> -    TcpPutUint32 (Data + 8, Tcb->TsRecent);
> -  }
> -
> -  return Len;
> -}
> -
> -
> -/**
> -  Parse the supported options.
> -
> -  @param  Tcp     Pointer to the TCP_CB of this TCP instance.
> -  @param  Option  Pointer to the TCP_OPTION used to store the successfully
> pasrsed
> -                  options.
> -
> -  @retval 0       The options are successfully pasrsed.
> -  @retval -1      Ilegal option was found.
> -
> -**/
> -INTN
> -TcpParseOption (
> -  IN     TCP_HEAD   *Tcp,
> -  IN OUT TCP_OPTION *Option
> -  )
> -{
> -  UINT8 *Head;
> -  UINT8 TotalLen;
> -  UINT8 Cur;
> -  UINT8 Type;
> -  UINT8 Len;
> -
> -  ASSERT ((Tcp != NULL) && (Option != NULL));
> -
> -  Option->Flag  = 0;
> -
> -  TotalLen      = (UINT8) ((Tcp->HeadLen << 2) - sizeof (TCP_HEAD));
> -  if (TotalLen <= 0) {
> -    return 0;
> -  }
> -
> -  Head = (UINT8 *) (Tcp + 1);
> -
> -  //
> -  // Fast process of timestamp option
> -  //
> -  if ((TotalLen == TCP_OPTION_TS_ALIGNED_LEN) &&
> -      (TcpGetUint32 (Head) == TCP_OPTION_TS_FAST)) {
> -
> -    Option->TSVal = TcpGetUint32 (Head + 4);
> -    Option->TSEcr = TcpGetUint32 (Head + 8);
> -    Option->Flag  = TCP_OPTION_RCVD_TS;
> -
> -    return 0;
> -  }
> -
> -  //
> -  // Slow path to process the options.
> -  //
> -  Cur = 0;
> -
> -  while (Cur < TotalLen) {
> -    Type = Head[Cur];
> -
> -    switch (Type) {
> -    case TCP_OPTION_MSS:
> -      Len = Head[Cur + 1];
> -
> -      if ((Len != TCP_OPTION_MSS_LEN) ||
> -          (TotalLen - Cur < TCP_OPTION_MSS_LEN)) {
> -
> -        return -1;
> -      }
> -
> -      Option->Mss = TcpGetUint16 (&Head[Cur + 2]);
> -      TCP_SET_FLG (Option->Flag, TCP_OPTION_RCVD_MSS);
> -
> -      Cur += TCP_OPTION_MSS_LEN;
> -      break;
> -
> -    case TCP_OPTION_WS:
> -      Len = Head[Cur + 1];
> -
> -      if ((Len != TCP_OPTION_WS_LEN) ||
> -          (TotalLen - Cur < TCP_OPTION_WS_LEN)) {
> -
> -        return -1;
> -      }
> -
> -      Option->WndScale = (UINT8) MIN (14, Head[Cur + 2]);
> -      TCP_SET_FLG (Option->Flag, TCP_OPTION_RCVD_WS);
> -
> -      Cur += TCP_OPTION_WS_LEN;
> -      break;
> -
> -    case TCP_OPTION_TS:
> -      Len = Head[Cur + 1];
> -
> -      if ((Len != TCP_OPTION_TS_LEN) ||
> -          (TotalLen - Cur < TCP_OPTION_TS_LEN)) {
> -
> -        return -1;
> -      }
> -
> -      Option->TSVal = TcpGetUint32 (&Head[Cur + 2]);
> -      Option->TSEcr = TcpGetUint32 (&Head[Cur + 6]);
> -      TCP_SET_FLG (Option->Flag, TCP_OPTION_RCVD_TS);
> -
> -      Cur += TCP_OPTION_TS_LEN;
> -      break;
> -
> -    case TCP_OPTION_NOP:
> -      Cur++;
> -      break;
> -
> -    case TCP_OPTION_EOP:
> -      Cur = TotalLen;
> -      break;
> -
> -    default:
> -      Len = Head[Cur + 1];
> -
> -      if ((TotalLen - Cur) < Len || Len < 2) {
> -        return -1;
> -      }
> -
> -      Cur = (UINT8) (Cur + Len);
> -      break;
> -    }
> -
> -  }
> -
> -  return 0;
> -}
> -
> -
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c
> deleted file mode 100644
> index 760b09a1eda1..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c
> +++ /dev/null
> @@ -1,1238 +0,0 @@
> -/** @file
> -  TCP output process routines.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#include "Tcp4Main.h"
> -
> -UINT8  mTcpOutFlag[] = {
> -  0,                          // TCP_CLOSED
> -  0,                          // TCP_LISTEN
> -  TCP_FLG_SYN,                // TCP_SYN_SENT
> -  TCP_FLG_SYN | TCP_FLG_ACK,  // TCP_SYN_RCVD
> -  TCP_FLG_ACK,                // TCP_ESTABLISHED
> -  TCP_FLG_FIN | TCP_FLG_ACK,  // TCP_FIN_WAIT_1
> -  TCP_FLG_ACK,                // TCP_FIN_WAIT_2
> -  TCP_FLG_ACK | TCP_FLG_FIN,  // TCP_CLOSING
> -  TCP_FLG_ACK,                // TCP_TIME_WAIT
> -  TCP_FLG_ACK,                // TCP_CLOSE_WAIT
> -  TCP_FLG_FIN | TCP_FLG_ACK   // TCP_LAST_ACK
> -};
> -
> -
> -/**
> -  Compute the sequence space left in the old receive window.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -  @return The sequence space left in the old receive window.
> -
> -**/
> -UINT32
> -TcpRcvWinOld (
> -  IN TCP_CB *Tcb
> -  )
> -{
> -  UINT32  OldWin;
> -
> -  OldWin = 0;
> -
> -  if (TCP_SEQ_GT (Tcb->RcvWl2 + Tcb->RcvWnd, Tcb->RcvNxt)) {
> -
> -    OldWin = TCP_SUB_SEQ (
> -              Tcb->RcvWl2 + Tcb->RcvWnd,
> -              Tcb->RcvNxt
> -              );
> -  }
> -
> -  return OldWin;
> -}
> -
> -
> -/**
> -  Compute the current receive window.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -  @return The size of the current receive window, in bytes.
> -
> -**/
> -UINT32
> -TcpRcvWinNow (
> -  IN TCP_CB *Tcb
> -  )
> -{
> -  SOCKET  *Sk;
> -  UINT32  Win;
> -  UINT32  Increase;
> -  UINT32  OldWin;
> -
> -  Sk = Tcb->Sk;
> -  ASSERT (Sk != NULL);
> -
> -  OldWin    = TcpRcvWinOld (Tcb);
> -
> -  Win       = SockGetFreeSpace (Sk, SOCK_RCV_BUF);
> -
> -  Increase  = 0;
> -  if (Win > OldWin) {
> -    Increase = Win - OldWin;
> -  }
> -
> -  //
> -  // Receiver's SWS: don't advertise a bigger window
> -  // unless it can be increased by at least one Mss or
> -  // half of the receive buffer.
> -  //
> -  if ((Increase > Tcb->SndMss) ||
> -      (2 * Increase >= GET_RCV_BUFFSIZE (Sk))) {
> -
> -    return Win;
> -  }
> -
> -  return OldWin;
> -}
> -
> -
> -/**
> -  Compute the value to fill in the window size field of the outgoing segment.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Syn     The flag to indicate whether the outgoing segment is a SYN
> -                  segment.
> -
> -  @return The value of the local receive window size used to fill the outing
> segment.
> -
> -**/
> -UINT16
> -TcpComputeWnd (
> -  IN OUT TCP_CB  *Tcb,
> -  IN     BOOLEAN Syn
> -  )
> -{
> -  UINT32  Wnd;
> -
> -  //
> -  // RFC requires that initial window not be scaled
> -  //
> -  if (Syn) {
> -
> -    Wnd = GET_RCV_BUFFSIZE (Tcb->Sk);
> -  } else {
> -
> -    Wnd         = TcpRcvWinNow (Tcb);
> -
> -    Tcb->RcvWnd = Wnd;
> -  }
> -
> -  Wnd = MIN (Wnd >> Tcb->RcvWndScale, 0xffff);
> -  return NTOHS ((UINT16) Wnd);
> -}
> -
> -
> -/**
> -  Get the maximum SndNxt.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -  @return The sequence number of the maximum SndNxt.
> -
> -**/
> -TCP_SEQNO
> -TcpGetMaxSndNxt (
> -  IN TCP_CB *Tcb
> -  )
> -{
> -  LIST_ENTRY      *Entry;
> -  NET_BUF         *Nbuf;
> -
> -  if (IsListEmpty (&Tcb->SndQue)) {
> -    return Tcb->SndNxt;
> -  }
> -
> -  Entry = Tcb->SndQue.BackLink;
> -  Nbuf  = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);
> -
> -  ASSERT (TCP_SEQ_GEQ (TCPSEG_NETBUF (Nbuf)->End, Tcb->SndNxt));
> -  return TCPSEG_NETBUF (Nbuf)->End;
> -}
> -
> -
> -/**
> -  Compute how much data to send.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Force   Whether to ignore the sender's SWS avoidance algorithm and
> send
> -                  out data by force.
> -
> -  @return The length of the data can be sent, if 0, no data can be sent.
> -
> -**/
> -UINT32
> -TcpDataToSend (
> -  IN TCP_CB *Tcb,
> -  IN INTN   Force
> -  )
> -{
> -  SOCKET  *Sk;
> -  UINT32  Win;
> -  UINT32  Len;
> -  UINT32  Left;
> -  UINT32  Limit;
> -
> -  Sk = Tcb->Sk;
> -  ASSERT (Sk != NULL);
> -
> -  //
> -  // TCP should NOT send data beyond the send window
> -  // and congestion window. The right edge of send
> -  // window is defined as SND.WL2 + SND.WND. The right
> -  // edge of congestion window is defined as SND.UNA +
> -  // CWND.
> -  //
> -  Win   = 0;
> -  Limit = Tcb->SndWl2 + Tcb->SndWnd;
> -
> -  if (TCP_SEQ_GT (Limit, Tcb->SndUna + Tcb->CWnd)) {
> -
> -    Limit = Tcb->SndUna + Tcb->CWnd;
> -  }
> -
> -  if (TCP_SEQ_GT (Limit, Tcb->SndNxt)) {
> -    Win = TCP_SUB_SEQ (Limit, Tcb->SndNxt);
> -  }
> -
> -  //
> -  // The data to send contains two parts: the data on the
> -  // socket send queue, and the data on the TCB's send
> -  // buffer. The later can be non-zero if the peer shrinks
> -  // its advertised window.
> -  //
> -  Left  = GET_SND_DATASIZE (Sk) +
> -          TCP_SUB_SEQ (TcpGetMaxSndNxt (Tcb), Tcb->SndNxt);
> -
> -  Len   = MIN (Win, Left);
> -
> -  if (Len > Tcb->SndMss) {
> -    Len = Tcb->SndMss;
> -  }
> -
> -  if ((Force != 0)|| (Len == 0 && Left == 0)) {
> -    return Len;
> -  }
> -
> -  if (Len == 0 && Left != 0) {
> -    goto SetPersistTimer;
> -  }
> -
> -  //
> -  // Sender's SWS avoidance: Don't send a small segment unless
> -  // a)A full-sized segment can be sent,
> -  // b)at least one-half of the maximum sized windows that
> -  // the other end has ever advertised.
> -  // c)It can send everything it has and either it isn't
> -  // expecting an ACK or the Nagle algorithm is disabled.
> -  //
> -  if ((Len == Tcb->SndMss) || (2 * Len >= Tcb->SndWndMax)) {
> -
> -    return Len;
> -  }
> -
> -  if ((Len == Left) &&
> -      ((Tcb->SndNxt == Tcb->SndUna) ||
> -      TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_NAGLE))) {
> -
> -    return Len;
> -  }
> -
> -  //
> -  // RFC1122 suggests to set a timer when SWSA forbids TCP
> -  // sending more data, and combine it with probe timer.
> -  //
> -SetPersistTimer:
> -  if (!TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_REXMIT)) {
> -
> -    DEBUG (
> -      (EFI_D_WARN,
> -      "TcpDataToSend: enter persistent state for TCB %p\n",
> -      Tcb)
> -      );
> -
> -    if (!Tcb->ProbeTimerOn) {
> -      TcpSetProbeTimer (Tcb);
> -    }
> -  }
> -
> -  return 0;
> -}
> -
> -
> -/**
> -  Build the TCP header of the TCP segment and transmit the segment by IP.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf    Pointer to the buffer containing the segment to be sent out.
> -
> -  @retval 0       The segment is sent out successfully.
> -  @retval other   Error condition occurred.
> -
> -**/
> -INTN
> -TcpTransmitSegment (
> -  IN OUT TCP_CB  *Tcb,
> -  IN     NET_BUF *Nbuf
> -  )
> -{
> -  UINT16    Len;
> -  TCP_HEAD  *Head;
> -  TCP_SEG   *Seg;
> -  BOOLEAN   Syn;
> -  UINT32    DataLen;
> -
> -  ASSERT ((Nbuf != NULL) && (Nbuf->Tcp == NULL) && (TcpVerifySegment
> (Nbuf) != 0));
> -
> -  DataLen = Nbuf->TotalSize;
> -
> -  Seg     = TCPSEG_NETBUF (Nbuf);
> -  Syn     = TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN);
> -
> -  if (Syn) {
> -
> -    Len = TcpSynBuildOption (Tcb, Nbuf);
> -  } else {
> -
> -    Len = TcpBuildOption (Tcb, Nbuf);
> -  }
> -
> -  ASSERT ((Len % 4 == 0) && (Len <= 40));
> -
> -  Len += sizeof (TCP_HEAD);
> -
> -  Head = (TCP_HEAD *) NetbufAllocSpace (
> -                        Nbuf,
> -                        sizeof (TCP_HEAD),
> -                        NET_BUF_HEAD
> -                        );
> -
> -  ASSERT (Head != NULL);
> -
> -  Nbuf->Tcp       = Head;
> -
> -  Head->SrcPort   = Tcb->LocalEnd.Port;
> -  Head->DstPort   = Tcb->RemoteEnd.Port;
> -  Head->Seq       = NTOHL (Seg->Seq);
> -  Head->Ack       = NTOHL (Tcb->RcvNxt);
> -  Head->HeadLen   = (UINT8) (Len >> 2);
> -  Head->Res       = 0;
> -  Head->Wnd       = TcpComputeWnd (Tcb, Syn);
> -  Head->Checksum  = 0;
> -
> -  //
> -  // Check whether to set the PSH flag.
> -  //
> -  TCP_CLEAR_FLG (Seg->Flag, TCP_FLG_PSH);
> -
> -  if (DataLen != 0) {
> -    if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_SND_PSH) &&
> -        TCP_SEQ_BETWEEN (Seg->Seq, Tcb->SndPsh, Seg->End)) {
> -
> -      TCP_SET_FLG (Seg->Flag, TCP_FLG_PSH);
> -      TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_SND_PSH);
> -
> -    } else if ((Seg->End == Tcb->SndNxt) &&
> -               (GET_SND_DATASIZE (Tcb->Sk) == 0)) {
> -
> -      TCP_SET_FLG (Seg->Flag, TCP_FLG_PSH);
> -    }
> -  }
> -
> -  //
> -  // Check whether to set the URG flag and the urgent pointer.
> -  //
> -  TCP_CLEAR_FLG (Seg->Flag, TCP_FLG_URG);
> -
> -  if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_SND_URG) &&
> -      TCP_SEQ_LEQ (Seg->Seq, Tcb->SndUp)) {
> -
> -    TCP_SET_FLG (Seg->Flag, TCP_FLG_URG);
> -
> -    if (TCP_SEQ_LT (Tcb->SndUp, Seg->End)) {
> -
> -      Seg->Urg = (UINT16) TCP_SUB_SEQ (Tcb->SndUp, Seg->Seq);
> -    } else {
> -
> -      Seg->Urg = (UINT16) MIN (
> -                            TCP_SUB_SEQ (Tcb->SndUp,
> -                            Seg->Seq),
> -                            0xffff
> -                            );
> -    }
> -  }
> -
> -  Head->Flag      = Seg->Flag;
> -  Head->Urg       = NTOHS (Seg->Urg);
> -  Head->Checksum  = TcpChecksum (Nbuf, Tcb->HeadSum);
> -
> -  //
> -  // update the TCP session's control information
> -  //
> -  Tcb->RcvWl2 = Tcb->RcvNxt;
> -  if (Syn) {
> -    Tcb->RcvWnd = NTOHS (Head->Wnd);
> -  }
> -
> -  //
> -  // clear delayedack flag
> -  //
> -  Tcb->DelayedAck = 0;
> -
> -  return TcpSendIpPacket (Tcb, Nbuf, Tcb->LocalEnd.Ip, Tcb->RemoteEnd.Ip);
> -}
> -
> -
> -/**
> -  Get a segment from the Tcb's SndQue.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Seq     The sequence number of the segment.
> -  @param  Len     The maximum length of the segment.
> -
> -  @return Pointer to the segment, if NULL some error occurred.
> -
> -**/
> -NET_BUF *
> -TcpGetSegmentSndQue (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_SEQNO Seq,
> -  IN UINT32    Len
> -  )
> -{
> -  LIST_ENTRY      *Head;
> -  LIST_ENTRY      *Cur;
> -  NET_BUF         *Node;
> -  TCP_SEG         *Seg;
> -  NET_BUF         *Nbuf;
> -  TCP_SEQNO       End;
> -  UINT8           *Data;
> -  UINT8           Flag;
> -  INT32           Offset;
> -  INT32           CopyLen;
> -
> -  ASSERT ((Tcb != NULL) && TCP_SEQ_LEQ (Seq, Tcb->SndNxt) && (Len > 0));
> -
> -  //
> -  // Find the segment that contains the Seq.
> -  //
> -  Head  = &Tcb->SndQue;
> -
> -  Node  = NULL;
> -  Seg   = NULL;
> -
> -  NET_LIST_FOR_EACH (Cur, Head) {
> -    Node  = NET_LIST_USER_STRUCT (Cur, NET_BUF, List);
> -    Seg   = TCPSEG_NETBUF (Node);
> -
> -    if (TCP_SEQ_LT (Seq, Seg->End) && TCP_SEQ_LEQ (Seg->Seq, Seq)) {
> -
> -      break;
> -    }
> -  }
> -
> -  ASSERT (Cur  != Head);
> -  ASSERT (Node != NULL);
> -  ASSERT (Seg  != NULL);
> -
> -  //
> -  // Return the buffer if it can be returned without
> -  // adjustment:
> -  //
> -  if ((Seg->Seq == Seq) &&
> -      TCP_SEQ_LEQ (Seg->End, Seg->Seq + Len) &&
> -      !NET_BUF_SHARED (Node)) {
> -
> -    NET_GET_REF (Node);
> -    return Node;
> -  }
> -
> -  //
> -  // Create a new buffer and copy data there.
> -  //
> -  Nbuf = NetbufAlloc (Len + TCP_MAX_HEAD);
> -
> -  if (Nbuf == NULL) {
> -    return NULL;
> -  }
> -
> -  NetbufReserve (Nbuf, TCP_MAX_HEAD);
> -
> -  Flag  = Seg->Flag;
> -  End   = Seg->End;
> -
> -  if (TCP_SEQ_LT (Seq + Len, Seg->End)) {
> -    End = Seq + Len;
> -  }
> -
> -  CopyLen = TCP_SUB_SEQ (End, Seq);
> -  Offset  = TCP_SUB_SEQ (Seq, Seg->Seq);
> -
> -  //
> -  // If SYN is set and out of the range, clear the flag.
> -  // Because the sequence of the first byte is SEG.SEQ+1,
> -  // adjust Offset by -1. If SYN is in the range, copy
> -  // one byte less.
> -  //
> -  if (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN)) {
> -
> -    if (TCP_SEQ_LT (Seg->Seq, Seq)) {
> -
> -      TCP_CLEAR_FLG (Flag, TCP_FLG_SYN);
> -      Offset--;
> -    } else {
> -
> -      CopyLen--;
> -    }
> -  }
> -
> -  //
> -  // If FIN is set and in the range, copy one byte less,
> -  // and if it is out of the range, clear the flag.
> -  //
> -  if (TCP_FLG_ON (Seg->Flag, TCP_FLG_FIN)) {
> -
> -    if (Seg->End == End) {
> -
> -      CopyLen--;
> -    } else {
> -
> -      TCP_CLEAR_FLG (Flag, TCP_FLG_FIN);
> -    }
> -  }
> -
> -  ASSERT (CopyLen >= 0);
> -
> -  //
> -  // copy data to the segment
> -  //
> -  if (CopyLen != 0) {
> -    Data = NetbufAllocSpace (Nbuf, CopyLen, NET_BUF_TAIL);
> -    ASSERT (Data != NULL);
> -
> -    if ((INT32) NetbufCopy (Node, Offset, CopyLen, Data) != CopyLen) {
> -      goto OnError;
> -    }
> -  }
> -
> -  CopyMem (TCPSEG_NETBUF (Nbuf), Seg, sizeof (TCP_SEG));
> -
> -  TCPSEG_NETBUF (Nbuf)->Seq   = Seq;
> -  TCPSEG_NETBUF (Nbuf)->End   = End;
> -  TCPSEG_NETBUF (Nbuf)->Flag  = Flag;
> -
> -  return Nbuf;
> -
> -OnError:
> -  NetbufFree (Nbuf);
> -  return NULL;
> -}
> -
> -
> -/**
> -  Get a segment from the Tcb's socket buffer.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Seq     The sequence number of the segment.
> -  @param  Len     The maximum length of the segment.
> -
> -  @return Pointer to the segment, if NULL some error occurred.
> -
> -**/
> -NET_BUF *
> -TcpGetSegmentSock (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_SEQNO Seq,
> -  IN UINT32    Len
> -  )
> -{
> -  NET_BUF *Nbuf;
> -  UINT8   *Data;
> -  UINT32  DataGet;
> -
> -  ASSERT ((Tcb != NULL) && (Tcb->Sk != NULL));
> -
> -  Nbuf = NetbufAlloc (Len + TCP_MAX_HEAD);
> -
> -  if (Nbuf == NULL) {
> -    DEBUG ((EFI_D_ERROR, "TcpGetSegmentSock: failed to allocate "
> -      "a netbuf for TCB %p\n",Tcb));
> -
> -    return NULL;
> -  }
> -
> -  NetbufReserve (Nbuf, TCP_MAX_HEAD);
> -
> -  DataGet = 0;
> -
> -  if (Len != 0) {
> -    //
> -    // copy data to the segment.
> -    //
> -    Data = NetbufAllocSpace (Nbuf, Len, NET_BUF_TAIL);
> -    ASSERT (Data != NULL);
> -
> -    DataGet = SockGetDataToSend (Tcb->Sk, 0, Len, Data);
> -  }
> -
> -  NET_GET_REF (Nbuf);
> -
> -  TCPSEG_NETBUF (Nbuf)->Seq = Seq;
> -  TCPSEG_NETBUF (Nbuf)->End = Seq + Len;
> -
> -  InsertTailList (&(Tcb->SndQue), &(Nbuf->List));
> -
> -  if (DataGet != 0) {
> -
> -    SockDataSent (Tcb->Sk, DataGet);
> -  }
> -
> -  return Nbuf;
> -}
> -
> -
> -/**
> -  Get a segment starting from sequence Seq of a maximum
> -  length of Len.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Seq     The sequence number of the segment.
> -  @param  Len     The maximum length of the segment.
> -
> -  @return Pointer to the segment, if NULL some error occurred.
> -
> -**/
> -NET_BUF *
> -TcpGetSegment (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_SEQNO Seq,
> -  IN UINT32    Len
> -  )
> -{
> -  NET_BUF *Nbuf;
> -
> -  ASSERT (Tcb != NULL);
> -
> -  //
> -  // Compare the SndNxt with the max sequence number sent.
> -  //
> -  if ((Len != 0) && TCP_SEQ_LT (Seq, TcpGetMaxSndNxt (Tcb))) {
> -
> -    Nbuf = TcpGetSegmentSndQue (Tcb, Seq, Len);
> -  } else {
> -
> -    Nbuf = TcpGetSegmentSock (Tcb, Seq, Len);
> -  }
> -
> -  ASSERT (TcpVerifySegment (Nbuf) != 0);
> -  return Nbuf;
> -}
> -
> -
> -/**
> -  Retransmit the segment from sequence Seq.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Seq     The sequence number of the segment to be retransmitted.
> -
> -  @retval 0       Retransmission succeeded.
> -  @retval -1      Error condition occurred.
> -
> -**/
> -INTN
> -TcpRetransmit (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_SEQNO Seq
> -  )
> -{
> -  NET_BUF *Nbuf;
> -  UINT32  Len;
> -
> -  //
> -  // Compute the maxium length of retransmission. It is
> -  // limited by three factors:
> -  // 1. Less than SndMss
> -  // 2. must in the current send window
> -  // 3. will not change the boundaries of queued segments.
> -  //
> -
> -  //
> -  // Handle the Window Retraction if TCP window scale is enabled according to
> RFC7323:
> -  //   On first retransmission, or if the sequence number is out of
> -  //   window by less than 2^Rcv.Wind.Shift, then do normal
> -  //   retransmission(s) without regard to the receiver window as long
> -  //   as the original segment was in window when it was sent.
> -  //
> -  if ((Tcb->SndWndScale != 0) &&
> -      (TCP_SEQ_GT (Seq, Tcb->RetxmitSeqMax) || TCP_SEQ_BETWEEN (Tcb-
> >SndWl2 + Tcb->SndWnd, Seq, Tcb->SndWl2 + Tcb->SndWnd + (1 << Tcb-
> >SndWndScale)))) {
> -    Len = TCP_SUB_SEQ (Tcb->SndNxt, Seq);
> -    DEBUG (
> -      (EFI_D_WARN,
> -      "TcpRetransmit: retransmission without regard to the receiver window for
> TCB %p\n",
> -      Tcb)
> -      );
> -
> -  } else if (TCP_SEQ_GEQ (Tcb->SndWl2 + Tcb->SndWnd, Seq)) {
> -    Len = TCP_SUB_SEQ (Tcb->SndWl2 + Tcb->SndWnd, Seq);
> -
> -  } else {
> -    DEBUG (
> -      (EFI_D_WARN,
> -      "TcpRetransmit: retransmission cancelled because send window too small
> for TCB %p\n",
> -      Tcb)
> -      );
> -
> -    return 0;
> -  }
> -
> -  Len = MIN (Len, Tcb->SndMss);
> -
> -  Nbuf = TcpGetSegmentSndQue (Tcb, Seq, Len);
> -  if (Nbuf == NULL) {
> -    return -1;
> -  }
> -
> -  ASSERT (TcpVerifySegment (Nbuf) != 0);
> -
> -  if (TcpTransmitSegment (Tcb, Nbuf) != 0) {
> -    goto OnError;
> -  }
> -
> -  if (TCP_SEQ_GT (Seq, Tcb->RetxmitSeqMax)) {
> -    Tcb->RetxmitSeqMax = Seq;
> -  }
> -
> -  //
> -  // The retransmitted buffer may be on the SndQue,
> -  // trim TCP head because all the buffer on SndQue
> -  // are headless.
> -  //
> -  ASSERT (Nbuf->Tcp != NULL);
> -  NetbufTrim (Nbuf, (Nbuf->Tcp->HeadLen << 2), NET_BUF_HEAD);
> -  Nbuf->Tcp = NULL;
> -
> -  NetbufFree (Nbuf);
> -  return 0;
> -
> -OnError:
> -  if (Nbuf != NULL) {
> -    NetbufFree (Nbuf);
> -  }
> -
> -  return -1;
> -}
> -
> -
> -/**
> -  Check whether to send data/SYN/FIN and piggy back an ACK.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Force   Whether to ignore the sender's SWS avoidance algorithm and
> send
> -                  out data by force.
> -
> -  @return The number of bytes sent.
> -
> -**/
> -INTN
> -TcpToSendData (
> -  IN OUT TCP_CB *Tcb,
> -  IN     INTN Force
> -  )
> -{
> -  UINT32    Len;
> -  INTN      Sent;
> -  UINT8     Flag;
> -  NET_BUF   *Nbuf;
> -  TCP_SEG   *Seg;
> -  TCP_SEQNO Seq;
> -  TCP_SEQNO End;
> -
> -  ASSERT ((Tcb != NULL) && (Tcb->Sk != NULL) && (Tcb->State != TCP_LISTEN));
> -
> -  Sent = 0;
> -
> -  if ((Tcb->State == TCP_CLOSED) ||
> -      TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_FIN_SENT)) {
> -
> -    return 0;
> -  }
> -
> -SEND_AGAIN:
> -  //
> -  // compute how much data can be sent
> -  //
> -  Len   = TcpDataToSend (Tcb, Force);
> -  Seq   = Tcb->SndNxt;
> -
> -  ASSERT ((Tcb->State) < (ARRAY_SIZE (mTcpOutFlag)));
> -  Flag  = mTcpOutFlag[Tcb->State];
> -
> -  if ((Flag & TCP_FLG_SYN) != 0) {
> -
> -    Seq = Tcb->Iss;
> -    Len = 0;
> -  }
> -
> -  //
> -  // only send a segment without data if SYN or
> -  // FIN is set.
> -  //
> -  if ((Len == 0) &&
> -      ((Flag & (TCP_FLG_SYN | TCP_FLG_FIN)) == 0)) {
> -    return Sent;
> -  }
> -
> -  Nbuf = TcpGetSegment (Tcb, Seq, Len);
> -
> -  if (Nbuf == NULL) {
> -    DEBUG (
> -      (EFI_D_ERROR,
> -      "TcpToSendData: failed to get a segment for TCB %p\n",
> -      Tcb)
> -      );
> -
> -    goto OnError;
> -  }
> -
> -  Seg = TCPSEG_NETBUF (Nbuf);
> -
> -  //
> -  // Set the TcpSeg in Nbuf.
> -  //
> -  Len = Nbuf->TotalSize;
> -  End = Seq + Len;
> -  if (TCP_FLG_ON (Flag, TCP_FLG_SYN)) {
> -    End++;
> -  }
> -
> -  if ((Flag & TCP_FLG_FIN) != 0) {
> -    //
> -    // Send FIN if all data is sent, and FIN is
> -    // in the window
> -    //
> -    if ((TcpGetMaxSndNxt (Tcb) == Tcb->SndNxt) &&
> -        (GET_SND_DATASIZE (Tcb->Sk) == 0) &&
> -        TCP_SEQ_LT (End + 1, Tcb->SndWnd + Tcb->SndWl2)) {
> -
> -      DEBUG (
> -      (EFI_D_NET,
> -      "TcpToSendData: send FIN "
> -        "to peer for TCB %p in state %s\n",
> -        Tcb,
> -        mTcpStateName[Tcb->State])
> -      );
> -
> -      End++;
> -    } else {
> -      TCP_CLEAR_FLG (Flag, TCP_FLG_FIN);
> -    }
> -  }
> -
> -  Seg->Seq  = Seq;
> -  Seg->End  = End;
> -  Seg->Flag = Flag;
> -
> -  ASSERT (TcpVerifySegment (Nbuf) != 0);
> -  ASSERT (TcpCheckSndQue (&Tcb->SndQue) != 0);
> -
> -  //
> -  // don't send an empty segment here.
> -  //
> -  if (Seg->End == Seg->Seq) {
> -    DEBUG ((EFI_D_WARN, "TcpToSendData: created a empty"
> -      " segment for TCB %p, free it now\n", Tcb));
> -
> -    NetbufFree (Nbuf);
> -    return Sent;
> -  }
> -
> -  if (TcpTransmitSegment (Tcb, Nbuf) != 0) {
> -    NetbufTrim (Nbuf, (Nbuf->Tcp->HeadLen << 2), NET_BUF_HEAD);
> -    Nbuf->Tcp = NULL;
> -
> -    if ((Flag & TCP_FLG_FIN) != 0)  {
> -      TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_FIN_SENT);
> -    }
> -
> -    goto OnError;
> -  }
> -
> -  Sent += TCP_SUB_SEQ (End, Seq);
> -
> -  //
> -  // All the buffer in the SndQue is headless
> -  //
> -  ASSERT (Nbuf->Tcp != NULL);
> -
> -  NetbufTrim (Nbuf, (Nbuf->Tcp->HeadLen << 2), NET_BUF_HEAD);
> -  Nbuf->Tcp = NULL;
> -
> -  NetbufFree (Nbuf);
> -
> -  //
> -  // update status in TCB
> -  //
> -  Tcb->DelayedAck = 0;
> -
> -  if ((Flag & TCP_FLG_FIN) != 0) {
> -    TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_FIN_SENT);
> -  }
> -
> -  if (TCP_SEQ_GT (End, Tcb->SndNxt)) {
> -    Tcb->SndNxt = End;
> -  }
> -
> -  if (!TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_REXMIT)) {
> -    TcpSetTimer (Tcb, TCP_TIMER_REXMIT, Tcb->Rto);
> -  }
> -
> -  //
> -  // Enable RTT measurement only if not in retransmit.
> -  // Karn's algorithm reqires not to update RTT when in loss.
> -  //
> -  if ((Tcb->CongestState == TCP_CONGEST_OPEN) &&
> -      !TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RTT_ON)) {
> -
> -    DEBUG ((EFI_D_NET, "TcpToSendData: set RTT measure "
> -      "sequence %d for TCB %p\n", Seq, Tcb));
> -
> -    TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_RTT_ON);
> -    Tcb->RttSeq     = Seq;
> -    Tcb->RttMeasure = 0;
> -  }
> -
> -  if (Len == Tcb->SndMss) {
> -    goto SEND_AGAIN;
> -  }
> -
> -  return Sent;
> -
> -OnError:
> -  if (Nbuf != NULL) {
> -    NetbufFree (Nbuf);
> -  }
> -
> -  return Sent;
> -}
> -
> -
> -/**
> -  Send an ACK immediately.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpSendAck (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  NET_BUF *Nbuf;
> -  TCP_SEG *Seg;
> -
> -  Nbuf = NetbufAlloc (TCP_MAX_HEAD);
> -
> -  if (Nbuf == NULL) {
> -    return;
> -  }
> -
> -  NetbufReserve (Nbuf, TCP_MAX_HEAD);
> -
> -  Seg       = TCPSEG_NETBUF (Nbuf);
> -  Seg->Seq  = Tcb->SndNxt;
> -  Seg->End  = Tcb->SndNxt;
> -  Seg->Flag = TCP_FLG_ACK;
> -
> -  if (TcpTransmitSegment (Tcb, Nbuf) == 0) {
> -    TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW);
> -    Tcb->DelayedAck = 0;
> -  }
> -
> -  NetbufFree (Nbuf);
> -}
> -
> -
> -/**
> -  Send a zero probe segment. It can be used by keepalive and zero window
> probe.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -  @retval 0       The zero probe segment was sent out successfully.
> -  @retval other   Error condition occurred.
> -
> -**/
> -INTN
> -TcpSendZeroProbe (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  NET_BUF *Nbuf;
> -  TCP_SEG *Seg;
> -  INTN     Result;
> -
> -  Nbuf = NetbufAlloc (TCP_MAX_HEAD);
> -
> -  if (Nbuf == NULL) {
> -    return -1;
> -  }
> -
> -  NetbufReserve (Nbuf, TCP_MAX_HEAD);
> -
> -  //
> -  // SndNxt-1 is out of window. The peer should respond
> -  // with an ACK.
> -  //
> -  Seg       = TCPSEG_NETBUF (Nbuf);
> -  Seg->Seq  = Tcb->SndNxt - 1;
> -  Seg->End  = Tcb->SndNxt - 1;
> -  Seg->Flag = TCP_FLG_ACK;
> -
> -  Result    = TcpTransmitSegment (Tcb, Nbuf);
> -  NetbufFree (Nbuf);
> -
> -  return Result;
> -}
> -
> -
> -/**
> -  Check whether to send an ACK or delayed ACK.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpToSendAck (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  UINT32 TcpNow;
> -
> -  TcpNow = TcpRcvWinNow (Tcb);
> -  //
> -  // Generally, TCP should send a delayed ACK unless:
> -  //   1. ACK at least every other FULL sized segment received,
> -  //   2. Packets received out of order
> -  //   3. Receiving window is open
> -  //
> -  if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW) ||
> -      (Tcb->DelayedAck >= 1) ||
> -      (TcpNow > TcpRcvWinOld (Tcb))) {
> -    TcpSendAck (Tcb);
> -    return;
> -  }
> -
> -  DEBUG ((EFI_D_NET, "TcpToSendAck: scheduled a delayed"
> -    " ACK for TCB %p\n", Tcb));
> -
> -  //
> -  // schedule a delayed ACK
> -  //
> -  Tcb->DelayedAck++;
> -}
> -
> -
> -/**
> -  Send a RESET segment in response to the segment received.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance, may be NULL.
> -  @param  Head    TCP header of the segment that triggers the reset.
> -  @param  Len     Length of the segment that triggers the reset.
> -  @param  Local   Local IP address.
> -  @param  Remote  Remote peer's IP address.
> -
> -  @retval 0       A reset is sent or no need to send it.
> -  @retval -1      No reset is sent.
> -
> -**/
> -INTN
> -TcpSendReset (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_HEAD  *Head,
> -  IN INT32     Len,
> -  IN UINT32    Local,
> -  IN UINT32    Remote
> -  )
> -{
> -  NET_BUF   *Nbuf;
> -  TCP_HEAD  *Nhead;
> -  UINT16    HeadSum;
> -
> -  //
> -  // Don't respond to a Reset with reset
> -  //
> -  if ((Head->Flag & TCP_FLG_RST) != 0) {
> -    return 0;
> -  }
> -
> -  Nbuf = NetbufAlloc (TCP_MAX_HEAD);
> -
> -  if (Nbuf == NULL) {
> -    return -1;
> -  }
> -
> -  Nhead = (TCP_HEAD *) NetbufAllocSpace (
> -                        Nbuf,
> -                        sizeof (TCP_HEAD),
> -                        NET_BUF_TAIL
> -                        );
> -
> -  ASSERT (Nhead != NULL);
> -
> -  Nbuf->Tcp   = Nhead;
> -  Nhead->Flag = TCP_FLG_RST;
> -
> -  //
> -  // Derive Seq/ACK from the segment if no TCB
> -  // associated with it, otherwise from the Tcb
> -  //
> -  if (Tcb == NULL) {
> -
> -    if (TCP_FLG_ON (Head->Flag, TCP_FLG_ACK)) {
> -      Nhead->Seq  = Head->Ack;
> -      Nhead->Ack  = 0;
> -    } else {
> -      Nhead->Seq = 0;
> -      TCP_SET_FLG (Nhead->Flag, TCP_FLG_ACK);
> -      Nhead->Ack = HTONL (NTOHL (Head->Seq) + Len);
> -    }
> -  } else {
> -
> -    Nhead->Seq  = HTONL (Tcb->SndNxt);
> -    Nhead->Ack  = HTONL (Tcb->RcvNxt);
> -    TCP_SET_FLG (Nhead->Flag, TCP_FLG_ACK);
> -  }
> -
> -  Nhead->SrcPort  = Head->DstPort;
> -  Nhead->DstPort  = Head->SrcPort;
> -  Nhead->HeadLen  = (UINT8) (sizeof (TCP_HEAD) >> 2);
> -  Nhead->Res      = 0;
> -  Nhead->Wnd      = HTONS (0xFFFF);
> -  Nhead->Checksum = 0;
> -  Nhead->Urg      = 0;
> -
> -  HeadSum         = NetPseudoHeadChecksum (Local, Remote, 6, 0);
> -  Nhead->Checksum = TcpChecksum (Nbuf, HeadSum);
> -
> -  TcpSendIpPacket (Tcb, Nbuf, Local, Remote);
> -
> -  NetbufFree (Nbuf);
> -  return 0;
> -}
> -
> -
> -/**
> -  Verify that the segment is in good shape.
> -
> -  @param  Nbuf    Buffer that contains the segment to be checked.
> -
> -  @retval 0       The segment is broken.
> -  @retval 1       The segment is in good shape.
> -
> -**/
> -INTN
> -TcpVerifySegment (
> -  IN NET_BUF *Nbuf
> -  )
> -{
> -  TCP_HEAD  *Head;
> -  TCP_SEG   *Seg;
> -  UINT32    Len;
> -
> -  if (Nbuf == NULL) {
> -    return 1;
> -  }
> -
> -  NET_CHECK_SIGNATURE (Nbuf, NET_BUF_SIGNATURE);
> -
> -  Seg   = TCPSEG_NETBUF (Nbuf);
> -  Len   = Nbuf->TotalSize;
> -  Head  = Nbuf->Tcp;
> -
> -  if (Head != NULL) {
> -    if (Head->Flag != Seg->Flag) {
> -      return 0;
> -    }
> -
> -    Len -= (Head->HeadLen << 2);
> -  }
> -
> -  if (TCP_FLG_ON (Seg->Flag, TCP_FLG_SYN)) {
> -    Len++;
> -  }
> -
> -  if (TCP_FLG_ON (Seg->Flag, TCP_FLG_FIN)) {
> -    Len++;
> -  }
> -
> -  if (Seg->Seq + Len != Seg->End) {
> -    return 0;
> -  }
> -
> -  return 1;
> -}
> -
> -
> -/**
> -  Verify that all the segments in SndQue are in good shape.
> -
> -  @param  Head    Pointer to the head node of the SndQue.
> -
> -  @retval 0       At least one segment is broken.
> -  @retval 1       All segments in the specific queue are in good shape.
> -
> -**/
> -INTN
> -TcpCheckSndQue (
> -  IN LIST_ENTRY     *Head
> -  )
> -{
> -  LIST_ENTRY      *Entry;
> -  NET_BUF         *Nbuf;
> -  TCP_SEQNO       Seq;
> -
> -  if (IsListEmpty (Head)) {
> -    return 1;
> -  }
> -  //
> -  // Initialize the Seq
> -  //
> -  Entry = Head->ForwardLink;
> -  Nbuf  = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);
> -  Seq   = TCPSEG_NETBUF (Nbuf)->Seq;
> -
> -  NET_LIST_FOR_EACH (Entry, Head) {
> -    Nbuf = NET_LIST_USER_STRUCT (Entry, NET_BUF, List);
> -
> -    if (TcpVerifySegment (Nbuf) == 0) {
> -      return 0;
> -    }
> -
> -    //
> -    // All the node in the SndQue should has:
> -    // SEG.SEQ = LAST_SEG.END
> -    //
> -    if (Seq != TCPSEG_NETBUF (Nbuf)->Seq) {
> -      return 0;
> -    }
> -
> -    Seq = TCPSEG_NETBUF (Nbuf)->End;
> -  }
> -
> -  return 1;
> -}
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Timer.c
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Timer.c
> deleted file mode 100644
> index 4cb0ee7b5e6f..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Timer.c
> +++ /dev/null
> @@ -1,584 +0,0 @@
> -/** @file
> -  TCP timer related functions.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#include "Tcp4Main.h"
> -
> -UINT32    mTcpTick = 1000;
> -
> -/**
> -  Connect timeout handler.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpConnectTimeout (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Timeout handler for TCP retransmission timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpRexmitTimeout (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Timeout handler for window probe timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpProbeTimeout (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Timeout handler for keepalive timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpKeepaliveTimeout (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Timeout handler for FIN_WAIT_2 timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpFinwait2Timeout (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Timeout handler for 2MSL timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -Tcp2MSLTimeout (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -TCP_TIMER_HANDLER mTcpTimerHandler[TCP_TIMER_NUMBER] = {
> -  TcpConnectTimeout,
> -  TcpRexmitTimeout,
> -  TcpProbeTimeout,
> -  TcpKeepaliveTimeout,
> -  TcpFinwait2Timeout,
> -  Tcp2MSLTimeout,
> -};
> -
> -/**
> -  Close the TCP connection.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpClose (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  NetbufFreeList (&Tcb->SndQue);
> -  NetbufFreeList (&Tcb->RcvQue);
> -
> -  TcpSetState (Tcb, TCP_CLOSED);
> -}
> -
> -
> -/**
> -  Connect timeout handler.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpConnectTimeout (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  if (!TCP_CONNECTED (Tcb->State)) {
> -    DEBUG ((EFI_D_ERROR, "TcpConnectTimeout: connection closed "
> -      "because conenction timer timeout for TCB %p\n", Tcb));
> -
> -    if (EFI_ABORTED == Tcb->Sk->SockError) {
> -      SOCK_ERROR (Tcb->Sk, EFI_TIMEOUT);
> -    }
> -
> -    if (TCP_SYN_RCVD == Tcb->State) {
> -      DEBUG ((EFI_D_WARN, "TcpConnectTimeout: send reset because "
> -        "connection timer timeout for TCB %p\n", Tcb));
> -
> -      TcpResetConnection (Tcb);
> -
> -    }
> -
> -    TcpClose (Tcb);
> -  }
> -}
> -
> -
> -/**
> -  Timeout handler for TCP retransmission timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpRexmitTimeout (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  UINT32  FlightSize;
> -
> -  DEBUG ((EFI_D_WARN, "TcpRexmitTimeout: transmission "
> -    "timeout for TCB %p\n", Tcb));
> -
> -  //
> -  // Set the congestion window. FlightSize is the
> -  // amount of data that has been sent but not
> -  // yet ACKed.
> -  //
> -  FlightSize        = TCP_SUB_SEQ (Tcb->SndNxt, Tcb->SndUna);
> -  Tcb->Ssthresh     = MAX ((UINT32) (2 * Tcb->SndMss), FlightSize / 2);
> -
> -  Tcb->CWnd         = Tcb->SndMss;
> -  Tcb->LossRecover  = Tcb->SndNxt;
> -
> -  Tcb->LossTimes++;
> -  if ((Tcb->LossTimes > Tcb->MaxRexmit) &&
> -      !TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_CONNECT)) {
> -
> -    DEBUG ((EFI_D_ERROR, "TcpRexmitTimeout: connection closed "
> -      "because too many timeouts for TCB %p\n", Tcb));
> -
> -    if (EFI_ABORTED == Tcb->Sk->SockError) {
> -      SOCK_ERROR (Tcb->Sk, EFI_TIMEOUT);
> -    }
> -
> -    TcpClose (Tcb);
> -    return ;
> -  }
> -
> -  TcpBackoffRto (Tcb);
> -  TcpRetransmit (Tcb, Tcb->SndUna);
> -  TcpSetTimer (Tcb, TCP_TIMER_REXMIT, Tcb->Rto);
> -
> -  Tcb->CongestState = TCP_CONGEST_LOSS;
> -  TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_RTT_ON);
> -}
> -
> -
> -/**
> -  Timeout handler for window probe timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpProbeTimeout (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  //
> -  // This is the timer for sender's SWSA. RFC1122 requires
> -  // a timer set for sender's SWSA, and suggest combine it
> -  // with window probe timer. If data is sent, don't set
> -  // the probe timer, since retransmit timer is on.
> -  //
> -  if ((TcpDataToSend (Tcb, 1) != 0) && (TcpToSendData (Tcb, 1) > 0)) {
> -
> -    ASSERT (TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_REXMIT) != 0);
> -    Tcb->ProbeTimerOn = FALSE;
> -    return ;
> -  }
> -
> -  TcpSendZeroProbe (Tcb);
> -  TcpSetProbeTimer (Tcb);
> -}
> -
> -
> -/**
> -  Timeout handler for keepalive timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpKeepaliveTimeout (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  Tcb->KeepAliveProbes++;
> -
> -  //
> -  // Too many Keep-alive probes, drop the connection
> -  //
> -  if (Tcb->KeepAliveProbes > Tcb->MaxKeepAlive) {
> -
> -    if (EFI_ABORTED == Tcb->Sk->SockError) {
> -      SOCK_ERROR (Tcb->Sk, EFI_TIMEOUT);
> -    }
> -
> -    TcpClose (Tcb);
> -    return ;
> -  }
> -
> -  TcpSendZeroProbe (Tcb);
> -  TcpSetKeepaliveTimer (Tcb);
> -}
> -
> -
> -/**
> -  Timeout handler for FIN_WAIT_2 timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpFinwait2Timeout (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  DEBUG ((EFI_D_WARN, "TcpFinwait2Timeout: connection closed "
> -    "because FIN_WAIT2 timer timeouts for TCB %p\n", Tcb));
> -
> -  TcpClose (Tcb);
> -}
> -
> -
> -/**
> -  Timeout handler for 2MSL timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -Tcp2MSLTimeout (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  DEBUG ((EFI_D_WARN, "Tcp2MSLTimeout: connection closed "
> -    "because TIME_WAIT timer timeouts for TCB %p\n", Tcb));
> -
> -  TcpClose (Tcb);
> -}
> -
> -
> -/**
> -  Update the timer status and the next expire time according to the timers
> -  to expire in a specific future time slot.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpUpdateTimer (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  UINT16  Index;
> -
> -  //
> -  // Don't use a too large value to init NextExpire
> -  // since mTcpTick wraps around as sequence no does.
> -  //
> -  Tcb->NextExpire = 65535;
> -  TCP_CLEAR_FLG (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON);
> -
> -  for (Index = 0; Index < TCP_TIMER_NUMBER; Index++) {
> -
> -    if (TCP_TIMER_ON (Tcb->EnabledTimer, Index) &&
> -        TCP_TIME_LT (Tcb->Timer[Index], mTcpTick + Tcb->NextExpire)) {
> -
> -      Tcb->NextExpire = TCP_SUB_TIME (Tcb->Timer[Index], mTcpTick);
> -      TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON);
> -    }
> -  }
> -}
> -
> -
> -/**
> -  Enable a TCP timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Timer    The index of the timer to be enabled.
> -  @param  TimeOut  The timeout value of this timer.
> -
> -**/
> -VOID
> -TcpSetTimer (
> -  IN OUT TCP_CB *Tcb,
> -  IN     UINT16 Timer,
> -  IN     UINT32 TimeOut
> -  )
> -{
> -  TCP_SET_TIMER (Tcb->EnabledTimer, Timer);
> -  Tcb->Timer[Timer] = mTcpTick + TimeOut;
> -
> -  TcpUpdateTimer (Tcb);
> -}
> -
> -
> -/**
> -  Clear one TCP timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Timer    The index of the timer to be cleared.
> -
> -**/
> -VOID
> -TcpClearTimer (
> -  IN OUT TCP_CB *Tcb,
> -  IN     UINT16 Timer
> -  )
> -{
> -  TCP_CLEAR_TIMER (Tcb->EnabledTimer, Timer);
> -  TcpUpdateTimer (Tcb);
> -}
> -
> -
> -/**
> -  Clear all TCP timers.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpClearAllTimer (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  Tcb->EnabledTimer = 0;
> -  TcpUpdateTimer (Tcb);
> -}
> -
> -
> -/**
> -  Enable the window prober timer and set the timeout value.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpSetProbeTimer (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  if (!Tcb->ProbeTimerOn) {
> -    Tcb->ProbeTime    = Tcb->Rto;
> -    Tcb->ProbeTimerOn = TRUE;
> -
> -  } else {
> -    Tcb->ProbeTime <<= 1;
> -  }
> -
> -  if (Tcb->ProbeTime < TCP_RTO_MIN) {
> -
> -    Tcb->ProbeTime = TCP_RTO_MIN;
> -  } else if (Tcb->ProbeTime > TCP_RTO_MAX) {
> -
> -    Tcb->ProbeTime = TCP_RTO_MAX;
> -  }
> -
> -  TcpSetTimer (Tcb, TCP_TIMER_PROBE, Tcb->ProbeTime);
> -}
> -
> -
> -/**
> -  Enable the keepalive timer and set the timeout value.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpSetKeepaliveTimer (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_NO_KEEPALIVE)) {
> -    return ;
> -
> -  }
> -
> -  //
> -  // Set the timer to KeepAliveIdle if either
> -  // 1. the keepalive timer is off
> -  // 2. The keepalive timer is on, but the idle
> -  // is less than KeepAliveIdle, that means the
> -  // connection is alive since our last probe.
> -  //
> -  if (!TCP_TIMER_ON (Tcb->EnabledTimer, TCP_TIMER_KEEPALIVE) ||
> -      (Tcb->Idle < Tcb->KeepAliveIdle)) {
> -
> -    TcpSetTimer (Tcb, TCP_TIMER_KEEPALIVE, Tcb->KeepAliveIdle);
> -    Tcb->KeepAliveProbes = 0;
> -
> -  } else {
> -
> -    TcpSetTimer (Tcb, TCP_TIMER_KEEPALIVE, Tcb->KeepAlivePeriod);
> -  }
> -}
> -
> -
> -/**
> -  Backoff the RTO.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpBackoffRto (
> -  IN OUT TCP_CB *Tcb
> -  )
> -{
> -  //
> -  // Fold the RTT estimate if too many times, the estimate
> -  // may be wrong, fold it. So the next time a valid
> -  // measurement is sampled, we can start fresh.
> -  //
> -  if ((Tcb->LossTimes >= TCP_FOLD_RTT) && (Tcb->SRtt != 0)) {
> -    Tcb->RttVar += Tcb->SRtt >> 2;
> -    Tcb->SRtt = 0;
> -  }
> -
> -  Tcb->Rto <<= 1;
> -
> -  if (Tcb->Rto < TCP_RTO_MIN) {
> -
> -    Tcb->Rto = TCP_RTO_MIN;
> -  } else if (Tcb->Rto > TCP_RTO_MAX) {
> -
> -    Tcb->Rto = TCP_RTO_MAX;
> -  }
> -}
> -
> -
> -/**
> -  Heart beat timer handler.
> -
> -  @param  Context        Context of the timer event, ignored.
> -
> -**/
> -VOID
> -EFIAPI
> -TcpTickingDpc (
> -  IN VOID      *Context
> -  )
> -{
> -  LIST_ENTRY      *Entry;
> -  LIST_ENTRY      *Next;
> -  TCP_CB          *Tcb;
> -  INT16           Index;
> -
> -  mTcpTick++;
> -  mTcpGlobalIss += 100;
> -
> -  //
> -  // Don't use LIST_FOR_EACH, which isn't delete safe.
> -  //
> -  for (Entry = mTcpRunQue.ForwardLink; Entry != &mTcpRunQue; Entry = Next) {
> -
> -    Next  = Entry->ForwardLink;
> -
> -    Tcb   = NET_LIST_USER_STRUCT (Entry, TCP_CB, List);
> -
> -    if (Tcb->State == TCP_CLOSED) {
> -      continue;
> -    }
> -    //
> -    // The connection is doing RTT measurement.
> -    //
> -    if (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_RTT_ON)) {
> -      Tcb->RttMeasure++;
> -    }
> -
> -    Tcb->Idle++;
> -
> -    if (Tcb->DelayedAck != 0) {
> -      TcpSendAck (Tcb);
> -    }
> -
> -    //
> -    // No timer is active or no timer expired
> -    //
> -    if (!TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_TIMER_ON) ||
> -        ((--Tcb->NextExpire) > 0)) {
> -
> -      continue;
> -    }
> -
> -    //
> -    // Call the timeout handler for each expired timer.
> -    //
> -    for (Index = 0; Index < TCP_TIMER_NUMBER; Index++) {
> -
> -      if (TCP_TIMER_ON (Tcb->EnabledTimer, Index) &&
> -          TCP_TIME_LEQ (Tcb->Timer[Index], mTcpTick)) {
> -        //
> -        // disable the timer before calling the handler
> -        // in case the handler enables it again.
> -        //
> -        TCP_CLEAR_TIMER (Tcb->EnabledTimer, Index);
> -        mTcpTimerHandler[Index](Tcb);
> -
> -        //
> -        // The Tcb may have been deleted by the timer, or
> -        // no other timer is set.
> -        //
> -        if ((Next->BackLink != Entry) ||
> -            (Tcb->EnabledTimer == 0)) {
> -          break;
> -        }
> -      }
> -    }
> -
> -    //
> -    // If the Tcb still exist or some timer is set, update the timer
> -    //
> -    if (Index == TCP_TIMER_NUMBER) {
> -      TcpUpdateTimer (Tcb);
> -    }
> -  }
> -}
> -
> -/**
> -  Heart beat timer handler, queues the DPC at TPL_CALLBACK.
> -
> -  @param  Event    Timer event signaled, ignored.
> -  @param  Context  Context of the timer event, ignored.
> -
> -**/
> -VOID
> -EFIAPI
> -TcpTicking (
> -  IN EFI_EVENT Event,
> -  IN VOID      *Context
> -  )
> -{
> -  QueueDpc (TPL_CALLBACK, TcpTickingDpc, Context);
> -}
> -
> diff --git a/MdeModulePkg/MdeModulePkg.dsc
> b/MdeModulePkg/MdeModulePkg.dsc
> index 2465d39fd744..3529c8d30365 100644
> --- a/MdeModulePkg/MdeModulePkg.dsc
> +++ b/MdeModulePkg/MdeModulePkg.dsc
> @@ -359,7 +359,6 @@ [Components]
>    MdeModulePkg/Universal/Network/VlanConfigDxe/VlanConfigDxe.inf
>    MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Dxe.inf
>    MdeModulePkg/Universal/Network/SnpDxe/SnpDxe.inf
> -  MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dxe.inf
>    MdeModulePkg/Universal/Network/Udp4Dxe/Udp4Dxe.inf
> 
> 
> MdeModulePkg/Universal/PcatSingleSegmentPciCfg2Pei/PcatSingleSegmentPci
> Cfg2Pei.inf
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.h
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.h
> deleted file mode 100644
> index bea7479eb222..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.h
> +++ /dev/null
> @@ -1,131 +0,0 @@
> -/** @file
> -  Socket implementation header file.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#ifndef _SOCK_IMPL_H_
> -#define _SOCK_IMPL_H_
> -
> -#include "Socket.h"
> -#include "Tcp4Main.h"
> -
> -/**
> -  Signal a event with the given status.
> -
> -  @param Token        The token's event is to be signaled.
> -  @param TokenStatus  The status to be sent with the event.
> -
> -**/
> -#define SIGNAL_TOKEN(Token, TokenStatus) \
> -  do { \
> -    (Token)->Status = (TokenStatus); \
> -    gBS->SignalEvent ((Token)->Event); \
> -  } while (0)
> -
> -
> -/**
> -  Supporting function for both SockImpl and SockInterface.
> -
> -  @param Event  The Event this notify function registered to, ignored.
> -
> -**/
> -VOID
> -EFIAPI
> -SockFreeFoo (
> -  IN EFI_EVENT Event
> -  );
> -
> -/**
> -  Process the TCP send data, buffer the tcp txdata and append
> -  the buffer to socket send buffer,then try to send it.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  TcpTxData             Pointer to the tcp txdata.
> -
> -  @retval EFI_SUCCESS           The operation is completed successfully.
> -  @retval EFI_OUT_OF_RESOURCES  Failed due to resource limit.
> -
> -**/
> -EFI_STATUS
> -SockProcessTcpSndData (
> -  IN SOCKET   *Sock,
> -  IN VOID     *TcpTxData
> -  );
> -
> -/**
> -  Copy data from socket buffer to application provided receive buffer.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  TcpRxData             Pointer to the application provided receive buffer.
> -  @param  RcvdBytes             The maximum length of the data can be copied.
> -  @param  IsOOB                 If TRUE the data is OOB, else the data is normal.
> -
> -**/
> -VOID
> -SockSetTcpRxData (
> -  IN SOCKET     *Sock,
> -  IN VOID       *TcpRxData,
> -  IN UINT32     RcvdBytes,
> -  IN BOOLEAN    IsOOB
> -  );
> -
> -/**
> -  Get received data from the socket layer to the receive token.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  RcvToken              Pointer to the application provided receive token.
> -
> -  @return The length of data received in this token.
> -
> -**/
> -UINT32
> -SockProcessRcvToken (
> -  IN     SOCKET        *Sock,
> -  IN OUT SOCK_IO_TOKEN *RcvToken
> -  );
> -
> -/**
> -  Flush the socket.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockConnFlush (
> -  IN OUT SOCKET *Sock
> -  );
> -
> -/**
> -  Create a socket with initial data SockInitData.
> -
> -  @param  SockInitData          Pointer to the initial data of the socket.
> -
> -  @return Pointer to the newly created socket.
> -
> -**/
> -SOCKET *
> -SockCreate (
> -  IN SOCK_INIT_DATA *SockInitData
> -  );
> -
> -/**
> -  Destroy a socket.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockDestroy (
> -  IN OUT SOCKET *Sock
> -  );
> -
> -#endif
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Socket.h
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Socket.h
> deleted file mode 100644
> index 650a7dd8651f..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Socket.h
> +++ /dev/null
> @@ -1,954 +0,0 @@
> -/** @file
> -  Socket header file.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#ifndef _SOCKET_H_
> -#define _SOCKET_H_
> -
> -#include <Uefi.h>
> -
> -#include <Protocol/Ip4.h>
> -#include <Protocol/Tcp4.h>
> -#include <Protocol/Udp4.h>
> -
> -#include <Library/NetLib.h>
> -#include <Library/DebugLib.h>
> -#include <Library/BaseMemoryLib.h>
> -#include <Library/MemoryAllocationLib.h>
> -#include <Library/UefiRuntimeServicesTableLib.h>
> -#include <Library/UefiBootServicesTableLib.h>
> -#include <Library/UefiDriverEntryPoint.h>
> -#include <Library/UefiLib.h>
> -#include <Library/DpcLib.h>
> -#include <Library/PrintLib.h>
> -
> -#define SOCK_SND_BUF        0
> -#define SOCK_RCV_BUF        1
> -
> -#define SOCK_BUFF_LOW_WATER (2 * 1024)
> -#define SOCK_RCV_BUFF_SIZE  (8 * 1024)
> -#define SOCK_SND_BUFF_SIZE  (8 * 1024)
> -#define SOCK_BACKLOG        5
> -
> -#define PROTO_RESERVED_LEN  20
> -
> -#define SO_NO_MORE_DATA     0x0001
> -
> -//
> -//
> -//
> -// When a socket is created it enters into SO_UNCONFIGURED,
> -// no actions can be taken on this socket, only after calling
> -// SockConfigure. The state transition diagram of socket is
> -// as following:
> -//
> -// SO_UNCONFIGURED --- SO_CONFIGURED --- SO_CONNECTING
> -//  ^      |                                    |
> -//  |      --->  SO_LISTENING                   |
> -//  |                                           |
> -//  |------------------SO_DISCONNECTING<-- SO_CONNECTED
> -//
> -// A passive socket can only go into SO_LISTENING and
> -// SO_UNCONFIGURED state. SO_XXXING state is a middle state
> -// when a socket is undergoing a protocol procedure such
> -// as requesting a TCP connection.
> -//
> -//
> -//
> -
> -///
> -/// Socket state
> -///
> -#define SO_CLOSED        0
> -#define SO_LISTENING     1
> -#define SO_CONNECTING    2
> -#define SO_CONNECTED     3
> -#define SO_DISCONNECTING 4
> -
> -///
> -/// Socket configure state
> -///
> -#define SO_UNCONFIGURED        0
> -#define SO_CONFIGURED_ACTIVE   1
> -#define SO_CONFIGURED_PASSIVE  2
> -#define SO_NO_MAPPING          3
> -
> -/**
> -  Set socket SO_NO_MORE_DATA flag.
> -
> -  @param Sock               Pointer to the socket
> -
> -**/
> -#define SOCK_NO_MORE_DATA(Sock)     ((Sock)->Flag |= SO_NO_MORE_DATA)
> -
> -/**
> -  Check whether the socket is unconfigured.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket is unconfigued
> -  @retval False              The socket is not unconfigued
> -
> -**/
> -#define SOCK_IS_UNCONFIGURED(Sock)  ((Sock)->ConfigureState ==
> SO_UNCONFIGURED)
> -
> -/**
> -  Check whether the socket is configured.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket is configued
> -  @retval False              The socket is not configued
> -
> -**/
> -#define SOCK_IS_CONFIGURED(Sock) \
> -    (((Sock)->ConfigureState == SO_CONFIGURED_ACTIVE) || \
> -    ((Sock)->ConfigureState == SO_CONFIGURED_PASSIVE))
> -
> -/**
> -  Check whether the socket is configured to active mode.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket is configued to active mode
> -  @retval False              The socket is not configued to active mode
> -
> -**/
> -#define SOCK_IS_CONFIGURED_ACTIVE(Sock) \
> -  ((Sock)->ConfigureState == SO_CONFIGURED_ACTIVE)
> -
> -/**
> -  Check whether the socket is configured to passive mode.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket is configued to passive mode
> -  @retval False              The socket is not configued to passive mode
> -
> -**/
> -#define SOCK_IS_CONNECTED_PASSIVE(Sock) \
> -  ((Sock)->ConfigureState == SO_CONFIGURED_PASSIVE)
> -
> -/**
> -  Check whether the socket is mapped.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket is no mapping
> -  @retval False              The socket is mapped
> -
> -**/
> -#define SOCK_IS_NO_MAPPING(Sock) \
> -  ((Sock)->ConfigureState == SO_NO_MAPPING)
> -
> -/**
> -  Check whether the socket is closed.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket is closed
> -  @retval False              The socket is not closed
> -
> -**/
> -#define SOCK_IS_CLOSED(Sock)          ((Sock)->State == SO_CLOSED)
> -
> -/**
> -  Check whether the socket is listening.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket is listening
> -  @retval False              The socket is not listening
> -
> -**/
> -#define SOCK_IS_LISTENING(Sock)       ((Sock)->State == SO_LISTENING)
> -
> -/**
> -  Check whether the socket is connecting.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket is connecting
> -  @retval False              The socket is not connecting
> -
> -**/
> -#define SOCK_IS_CONNECTING(Sock)      ((Sock)->State == SO_CONNECTING)
> -
> -/**
> -  Check whether the socket has connected.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket has connected
> -  @retval False              The socket has not connected
> -
> -**/
> -#define SOCK_IS_CONNECTED(Sock)       ((Sock)->State == SO_CONNECTED)
> -
> -/**
> -  Check whether the socket is disconnecting.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket is disconnecting
> -  @retval False              The socket is not disconnecting
> -
> -**/
> -#define SOCK_IS_DISCONNECTING(Sock)   ((Sock)->State ==
> SO_DISCONNECTING)
> -
> -/**
> -  Check whether the socket is no more data.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @retval True               The socket is no more data
> -  @retval False              The socket still has data
> -
> -**/
> -#define SOCK_IS_NO_MORE_DATA(Sock)    (0 != ((Sock)->Flag &
> SO_NO_MORE_DATA))
> -
> -/**
> -  Set the size of the receive buffer.
> -
> -  @param  Sock               Pointer to the socket
> -  @param  Size               The size to set
> -
> -**/
> -#define SET_RCV_BUFFSIZE(Sock, Size)  ((Sock)->RcvBuffer.HighWater = (Size))
> -
> -/**
> -  Get the size of the receive buffer.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @return The receive buffer size
> -
> -**/
> -#define GET_RCV_BUFFSIZE(Sock)        ((Sock)->RcvBuffer.HighWater)
> -
> -/**
> -  Get the size of the receive data.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @return The received data size
> -
> -**/
> -#define GET_RCV_DATASIZE(Sock)        (((Sock)->RcvBuffer.DataQueue)-
> >BufSize)
> -
> -/**
> -  Set the size of the send buffer.
> -
> -  @param  Sock               Pointer to the socket
> -  @param  Size               The size to set
> -
> -**/
> -#define SET_SND_BUFFSIZE(Sock, Size)  ((Sock)->SndBuffer.HighWater = (Size))
> -
> -/**
> -  Get the size of the send buffer.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @return The send buffer size
> -
> -**/
> -#define GET_SND_BUFFSIZE(Sock)        ((Sock)->SndBuffer.HighWater)
> -
> -/**
> -  Get the size of the send data.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @return The send data size
> -
> -**/
> -#define GET_SND_DATASIZE(Sock)        (((Sock)->SndBuffer.DataQueue)-
> >BufSize)
> -
> -/**
> -  Set the backlog value of the socket.
> -
> -  @param  Sock               Pointer to the socket
> -  @param  Value              The value to set
> -
> -**/
> -#define SET_BACKLOG(Sock, Value)      ((Sock)->BackLog = (Value))
> -
> -/**
> -  Get the backlog value of the socket.
> -
> -  @param  Sock               Pointer to the socket
> -
> -  @return The backlog value
> -
> -**/
> -#define GET_BACKLOG(Sock)             ((Sock)->BackLog)
> -
> -/**
> -  Set the socket with error state.
> -
> -  @param  Sock               Pointer to the socket
> -  @param  Error              The error state
> -
> -**/
> -#define SOCK_ERROR(Sock, Error)       ((Sock)->SockError = (Error))
> -
> -#define SND_BUF_HDR_LEN(Sock) \
> -  ((SockBufFirst (&((Sock)->SndBuffer)))->TotalSize)
> -
> -#define RCV_BUF_HDR_LEN(Sock) \
> -  ((SockBufFirst (&((Sock)->RcvBuffer)))->TotalSize)
> -
> -#define SOCK_SIGNATURE                SIGNATURE_32 ('S', 'O', 'C', 'K')
> -
> -#define SOCK_FROM_THIS(a)             CR ((a), SOCKET, NetProtocol,
> SOCK_SIGNATURE)
> -
> -#define SOCK_FROM_TOKEN(Token)        (((SOCK_TOKEN *) (Token))->Sock)
> -
> -#define PROTO_TOKEN_FORM_SOCK(SockToken, Type) \
> -  ((Type *) (((SOCK_TOKEN *) (SockToken))->Token))
> -
> -typedef struct _SOCKET SOCKET;
> -
> -///
> -/// Socket completion token
> -///
> -typedef struct _SOCK_COMPLETION_TOKEN {
> -  EFI_EVENT   Event;            ///< The event to be issued
> -  EFI_STATUS  Status;           ///< The status to be issued
> -} SOCK_COMPLETION_TOKEN;
> -
> -typedef union {
> -  VOID  *RxData;
> -  VOID  *TxData;
> -} SOCK_IO_DATA;
> -
> -///
> -/// The application token with data packet
> -///
> -typedef struct _SOCK_IO_TOKEN {
> -  SOCK_COMPLETION_TOKEN Token;
> -  SOCK_IO_DATA          Packet;
> -} SOCK_IO_TOKEN;
> -
> -///
> -///  The request issued from socket layer to protocol layer.
> -///
> -#define SOCK_ATTACH     0    ///< Attach current socket to a new PCB
> -#define SOCK_DETACH     1    ///< Detach current socket from the PCB
> -#define SOCK_CONFIGURE  2    ///< Configure attached PCB
> -#define SOCK_FLUSH      3    ///< Flush attached PCB
> -#define SOCK_SND        4    ///< Need protocol to send something
> -#define SOCK_SNDPUSH    5    ///< Need protocol to send pushed data
> -#define SOCK_SNDURG     6    ///< Need protocol to send urgent data
> -#define SOCK_CONSUMED   7    ///< Application has retrieved data from socket
> -#define SOCK_CONNECT    8    ///< Need to connect to a peer
> -#define SOCK_CLOSE      9    ///< Need to close the protocol process
> -#define SOCK_ABORT      10   ///< Need to reset the protocol process
> -#define SOCK_POLL       11   ///< Need to poll to the protocol layer
> -#define SOCK_ROUTE      12   ///< Need to add a route information
> -#define SOCK_MODE       13   ///< Need to get the mode data of the protocol
> -#define SOCK_GROUP      14   ///< Need to join a mcast group
> -
> -///
> -///  The socket type.
> -///
> -typedef enum {
> -  SockDgram, ///< This socket providing datagram service
> -  SockStream ///< This socket providing stream service
> -} SOCK_TYPE;
> -
> -///
> -///  The buffer structure of rcvd data and send data used by socket.
> -///
> -typedef struct _SOCK_BUFFER {
> -  UINT32        HighWater;  ///< The buffersize upper limit of sock_buffer
> -  UINT32        LowWater;   ///< The low water mark of sock_buffer
> -  NET_BUF_QUEUE *DataQueue; ///< The queue to buffer data
> -} SOCK_BUFFER;
> -
> -/**
> -  The handler of protocol for request from socket.
> -
> -  @param Socket              The socket issuing the request to protocol
> -  @param Request             The request issued by socket
> -  @param RequestData         The request related data
> -
> -  @retval EFI_SUCCESS        The socket request is completed successfully.
> -  @retval other              The error status returned by the corresponding TCP
> -                             layer function.
> -
> -**/
> -typedef
> -EFI_STATUS
> -(*SOCK_PROTO_HANDLER) (
> -  IN SOCKET       *Socket,
> -  IN UINT8        Request,
> -  IN VOID         *RequestData
> -  );
> -
> -
> -//
> -// Socket provided oprerations for low layer protocol
> -//
> -
> -//
> -// Socket provided operations for user interface
> -//
> -
> -/**
> -  Set the state of the socket.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  State                 The new socket state to be set.
> -
> -**/
> -VOID
> -SockSetState (
> -  IN OUT SOCKET     *Sock,
> -  IN     UINT8      State
> -  );
> -
> -/**
> -  Called by the low layer protocol to indicate the socket a connection is
> -  established.
> -
> -  This function just changes the socket's state to SO_CONNECTED
> -  and signals the token used for connection establishment.
> -
> -  @param  Sock                  Pointer to the socket associated with the
> -                                established connection.
> -
> -**/
> -VOID
> -SockConnEstablished (
> -  IN SOCKET *Sock
> -  );
> -
> -/**
> -  Called by the low layer protocol to indicate the connection is closed.
> -
> -  This function flushes the socket, sets the state to SO_CLOSED and signals
> -  the close token.
> -
> -  @param  Sock                  Pointer to the socket associated with the closed
> -                                connection.
> -
> -**/
> -VOID
> -SockConnClosed (
> -  IN OUT SOCKET *Sock
> -  );
> -
> -/**
> -  Called by low layer protocol to indicate that some data is sent or processed.
> -
> -  This function trims the sent data in the socket send buffer, signals the data
> -  token if proper.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  Count                 The length of the data processed or sent, in bytes.
> -
> -**/
> -VOID
> -SockDataSent (
> -  IN SOCKET     *Sock,
> -  IN UINT32     Count
> -  );
> -
> -/**
> -  Called by the low layer protocol to copy some data in socket send
> -  buffer starting from the specific offset to a buffer provided by
> -  the caller.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  Offset                The start point of the data to be copied.
> -  @param  Len                   The length of the data to be copied.
> -  @param  Dest                  Pointer to the destination to copy the data.
> -
> -  @return The data size copied.
> -
> -**/
> -UINT32
> -SockGetDataToSend (
> -  IN SOCKET      *Sock,
> -  IN UINT32      Offset,
> -  IN UINT32      Len,
> -  IN UINT8       *Dest
> -  );
> -
> -/**
> -  Called by the low layer protocol to indicate that there
> -  will be no more data from the communication peer.
> -
> -  This function set the socket's state to SO_NO_MORE_DATA and
> -  signal all queued IO tokens with the error status EFI_CONNECTION_FIN.
> -
> -  @param  Sock                  Pointer to the socket.
> -
> -**/
> -VOID
> -SockNoMoreData (
> -  IN OUT SOCKET *Sock
> -  );
> -
> -/**
> -  Called by the low layer protocol to deliver received data to socket layer.
> -
> -  This function will append the data to the socket receive buffer, set ther
> -  urgent data length and then check if any receive token can be signaled.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  NetBuffer             Pointer to the buffer that contains the received
> -                                data.
> -  @param  UrgLen                The length of the urgent data in the received data.
> -
> -**/
> -VOID
> -SockDataRcvd (
> -  IN     SOCKET    *Sock,
> -  IN OUT NET_BUF   *NetBuffer,
> -  IN     UINT32    UrgLen
> -  );
> -
> -/**
> -  Get the length of the free space of the specific socket buffer.
> -
> -  @param  Sock                  Pointer to the socket.
> -  @param  Which                 Flag to indicate which socket buffer to check,
> -                                either send buffer or receive buffer.
> -
> -  @return The length of the free space, in bytes.
> -
> -**/
> -UINT32
> -SockGetFreeSpace (
> -  IN SOCKET  *Sock,
> -  IN UINT32  Which
> -  );
> -
> -/**
> -  Clone a new socket including its associated protocol control block.
> -
> -  @param  Sock                  Pointer to the socket to be cloned.
> -
> -  @return Pointer to the newly cloned socket. If NULL, error condition occurred.
> -
> -**/
> -SOCKET *
> -SockClone (
> -  IN SOCKET *Sock
> -  );
> -
> -
> -///
> -/// Proto type of the create callback
> -///
> -typedef
> -EFI_STATUS
> -(*SOCK_CREATE_CALLBACK) (
> -  IN SOCKET  *This,
> -  IN VOID    *Context
> -  );
> -
> -///
> -/// Proto type of the destroy callback
> -///
> -typedef
> -VOID
> -(*SOCK_DESTROY_CALLBACK) (
> -  IN SOCKET  *This,
> -  IN VOID    *Context
> -  );
> -
> -///
> -///  The initialize data for create a new socket.
> -///
> -typedef struct _SOCK_INIT_DATA {
> -  SOCK_TYPE   Type;
> -  UINT8       State;
> -
> -  SOCKET      *Parent;        ///< The parent of this socket
> -  UINT32      BackLog;        ///< The connection limit for listening socket
> -  UINT32      SndBufferSize;  ///< The high water mark of send buffer
> -  UINT32      RcvBufferSize;  ///< The high water mark of receive buffer
> -  VOID        *Protocol;      ///< The pointer to protocol function template
> -                              ///< wanted to install on socket
> -
> -  //
> -  // Callbacks after socket is created and before socket is to be destroyed.
> -  //
> -  SOCK_CREATE_CALLBACK   CreateCallback;  ///< Callback after created
> -  SOCK_DESTROY_CALLBACK  DestroyCallback; ///< Callback before destroied
> -  VOID                   *Context;        ///< The context of the callback
> -
> -  //
> -  // Opaque protocol data.
> -  //
> -  VOID                   *ProtoData;
> -  UINT32                 DataSize;
> -
> -  SOCK_PROTO_HANDLER     ProtoHandler;  ///< The handler of protocol for
> socket request
> -
> -  EFI_HANDLE   DriverBinding;           ///< The driver binding handle
> -} SOCK_INIT_DATA;
> -
> -///
> -///  The union type of TCP and UDP protocol.
> -///
> -typedef union _NET_PROTOCOL {
> -  EFI_TCP4_PROTOCOL TcpProtocol;   ///< Tcp protocol
> -  EFI_UDP4_PROTOCOL UdpProtocol;   ///< Udp protocol
> -} NET_PROTOCOL;
> -
> -///
> -/// The socket structure representing a network service access point
> -///
> -struct _SOCKET {
> -
> -  //
> -  // Socket description information
> -  //
> -  UINT32                Signature;      ///< Signature of the socket
> -  EFI_HANDLE            SockHandle;     ///< The virtual handle of the socket
> -  EFI_HANDLE            DriverBinding;  ///< Socket's driver binding protocol
> -  EFI_DEVICE_PATH_PROTOCOL  *ParentDevicePath;
> -  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
> -  LIST_ENTRY                Link;
> -  UINT8                 ConfigureState;
> -  SOCK_TYPE             Type;
> -  UINT8                 State;
> -  UINT16                Flag;
> -  EFI_LOCK              Lock;       ///< The lock of socket
> -  SOCK_BUFFER           SndBuffer;  ///< Send buffer of application's data
> -  SOCK_BUFFER           RcvBuffer;  ///< Receive buffer of received data
> -  EFI_STATUS            SockError;  ///< The error returned by low layer protocol
> -  BOOLEAN               InDestroy;
> -
> -  //
> -  // Fields used to manage the connection request
> -  //
> -  UINT32          BackLog;        ///< the limit of connection to this socket
> -  UINT32          ConnCnt;        ///< the current count of connections to it
> -  SOCKET          *Parent;        ///< listening parent that accept the connection
> -  LIST_ENTRY      ConnectionList; ///< the connections maintained by this socket
> -
> -  //
> -  // The queue to buffer application's asynchronous token
> -  //
> -  LIST_ENTRY      ListenTokenList;
> -  LIST_ENTRY      RcvTokenList;
> -  LIST_ENTRY      SndTokenList;
> -  LIST_ENTRY      ProcessingSndTokenList;
> -
> -  SOCK_COMPLETION_TOKEN *ConnectionToken; ///< app's token to signal if
> connected
> -  SOCK_COMPLETION_TOKEN *CloseToken;      ///< app's token to signal if
> closed
> -
> -  //
> -  // Interface for low level protocol
> -  //
> -  SOCK_PROTO_HANDLER    ProtoHandler;       ///< The request handler of
> protocol
> -  UINT8 ProtoReserved[PROTO_RESERVED_LEN];  ///< Data fields reserved for
> protocol
> -  NET_PROTOCOL          NetProtocol;        ///< TCP or UDP protocol socket used
> -
> -  //
> -  // Callbacks after socket is created and before socket is to be destroyed.
> -  //
> -  SOCK_CREATE_CALLBACK   CreateCallback;    ///< Callback after created
> -  SOCK_DESTROY_CALLBACK  DestroyCallback;   ///< Callback before destroied
> -  VOID                   *Context;          ///< The context of the callback
> -};
> -
> -///
> -///  The token structure buffered in socket layer.
> -///
> -typedef struct _SOCK_TOKEN {
> -  LIST_ENTRY            TokenList;      ///< The entry to add in the token list
> -  SOCK_COMPLETION_TOKEN *Token;         ///< The application's token
> -  UINT32                RemainDataLen;  ///< Unprocessed data length
> -  SOCKET                *Sock;          ///< The poninter to the socket this token
> -                                        ///< belongs to
> -} SOCK_TOKEN;
> -
> -///
> -/// Reserved data to access the NET_BUF delivered by UDP driver.
> -///
> -typedef struct _UDP_RSV_DATA {
> -  EFI_TIME              TimeStamp;
> -  EFI_UDP4_SESSION_DATA Session;
> -} UDP_RSV_DATA;
> -
> -///
> -/// Reserved data to access the NET_BUF delivered by TCP driver.
> -///
> -typedef struct _TCP_RSV_DATA {
> -  UINT32 UrgLen;
> -} TCP_RSV_DATA;
> -
> -/**
> -  Create a socket and its associated protocol control block
> -  with the intial data SockInitData and protocol specific
> -  data ProtoData.
> -
> -  @param  SockInitData         Inital data to setting the socket.
> -
> -  @return Pointer to the newly created socket. If NULL, error condition occured.
> -
> -**/
> -SOCKET *
> -SockCreateChild (
> -  IN SOCK_INIT_DATA *SockInitData
> -  );
> -
> -/**
> -  Destroy the socket Sock and its associated protocol control block.
> -
> -  @param  Sock                 The socket to be destroyed.
> -
> -  @retval EFI_SUCCESS          The socket Sock is destroyed successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket.
> -
> -**/
> -EFI_STATUS
> -SockDestroyChild (
> -  IN   SOCKET *Sock
> -  );
> -
> -/**
> -  Configure the specific socket Sock using configuration data ConfigData.
> -
> -  @param  Sock                 Pointer to the socket to be configured.
> -  @param  ConfigData           Pointer to the configuration data.
> -
> -  @retval EFI_SUCCESS          The socket is configured successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket or
> the
> -                               socket is already configured.
> -
> -**/
> -EFI_STATUS
> -SockConfigure (
> -  IN SOCKET *Sock,
> -  IN VOID   *ConfigData
> -  );
> -
> -/**
> -  Initiate a connection establishment process.
> -
> -  @param  Sock                 Pointer to the socket to initiate the initate the
> -                               connection.
> -  @param  Token                Pointer to the token used for the connection
> -                               operation.
> -
> -  @retval EFI_SUCCESS          The connection is initialized successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or
> the
> -                               socket is closed, or the socket is not configured to
> -                               be an active one, or the token is already in one of
> -                               this socket's lists.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -
> -**/
> -EFI_STATUS
> -SockConnect (
> -  IN SOCKET *Sock,
> -  IN VOID   *Token
> -  );
> -
> -/**
> -  Issue a listen token to get an existed connected network instance
> -  or wait for a connection if there is none.
> -
> -  @param  Sock                 Pointer to the socket to accept connections.
> -  @param  Token                The token to accept a connection.
> -
> -  @retval EFI_SUCCESS          Either a connection is accpeted or the Token is
> -                               buffered for further acception.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or
> the
> -                               socket is closed, or the socket is not configured to
> -                               be a passive one, or the token is already in one of
> -                               this socket's lists.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -  @retval EFI_OUT_OF_RESOURCE  Failed to buffer the Token due to memory
> limit.
> -
> -**/
> -EFI_STATUS
> -SockAccept (
> -  IN SOCKET *Sock,
> -  IN VOID   *Token
> -  );
> -
> -/**
> -  Issue a token with data to the socket to send out.
> -
> -  @param  Sock                 Pointer to the socket to process the token with
> -                               data.
> -  @param  Token                The token with data that needs to send out.
> -
> -  @retval EFI_SUCCESS          The token is processed successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or
> the
> -                               socket is closed, or the socket is not in a
> -                               synchronized state , or the token is already in one
> -                               of this socket's lists.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -  @retval EFI_OUT_OF_RESOURCE  Failed to buffer the token due to memory
> limit.
> -
> -**/
> -EFI_STATUS
> -SockSend (
> -  IN SOCKET *Sock,
> -  IN VOID   *Token
> -  );
> -
> -/**
> -  Issue a token to get data from the socket.
> -
> -  @param  Sock                 Pointer to the socket to get data from.
> -  @param  Token                The token to store the received data from the
> -                               socket.
> -
> -  @retval EFI_SUCCESS          The token is processed successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or
> the
> -                               socket is closed, or the socket is not in a
> -                               synchronized state , or the token is already in one
> -                               of this socket's lists.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -  @retval EFI_CONNECTION_FIN   The connection is closed and there is no
> more data.
> -  @retval EFI_OUT_OF_RESOURCE  Failed to buffer the token due to memory
> limit.
> -
> -**/
> -EFI_STATUS
> -SockRcv (
> -  IN SOCKET *Sock,
> -  IN VOID   *Token
> -  );
> -
> -/**
> -  Reset the socket and its associated protocol control block.
> -
> -  @param  Sock                 Pointer to the socket to be flushed.
> -
> -  @retval EFI_SUCCESS          The socket is flushed successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket.
> -
> -**/
> -EFI_STATUS
> -SockFlush (
> -  IN SOCKET *Sock
> -  );
> -
> -/**
> -  Close or abort the socket associated connection.
> -
> -  @param  Sock                 Pointer to the socket of the connection to close or
> -                               abort.
> -  @param  Token                The token for close operation.
> -  @param  OnAbort              TRUE for aborting the connection, FALSE to close it.
> -
> -  @retval EFI_SUCCESS          The close or abort operation is initialized
> -                               successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket, or
> the
> -                               socket is closed, or the socket is not in a
> -                               synchronized state , or the token is already in one
> -                               of this socket's lists.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -
> -**/
> -EFI_STATUS
> -SockClose (
> -  IN SOCKET  *Sock,
> -  IN VOID    *Token,
> -  IN BOOLEAN OnAbort
> -  );
> -
> -/**
> -  Get the mode data of the low layer protocol.
> -
> -  @param  Sock                 Pointer to the socket to get mode data from.
> -  @param  Mode                 Pointer to the data to store the low layer mode
> -                               information.
> -
> -  @retval EFI_SUCCESS          The mode data is got successfully.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -
> -**/
> -EFI_STATUS
> -SockGetMode (
> -  IN     SOCKET *Sock,
> -  IN OUT VOID   *Mode
> -  );
> -
> -/**
> -  Add or remove route information in IP route table associated
> -  with this socket.
> -
> -  @param  Sock                 Pointer to the socket associated with the IP route
> -                               table to operate on.
> -  @param  RouteInfo            Pointer to the route information to be processed.
> -
> -  @retval EFI_SUCCESS          The route table is updated successfully.
> -  @retval EFI_ACCESS_DENIED    Failed to get the lock to access the socket.
> -  @retval EFI_NO_MAPPING       The IP address configuration operation is  not
> -                               finished.
> -  @retval EFI_NOT_STARTED      The socket is not configured.
> -
> -**/
> -EFI_STATUS
> -SockRoute (
> -  IN SOCKET    *Sock,
> -  IN VOID      *RouteInfo
> -  );
> -
> -//
> -// Supporting function to operate on socket buffer
> -//
> -
> -/**
> -  Get the first buffer block in the specific socket buffer.
> -
> -  @param  Sockbuf               Pointer to the socket buffer.
> -
> -  @return Pointer to the first buffer in the queue. NULL if the queue is empty.
> -
> -**/
> -NET_BUF *
> -SockBufFirst (
> -  IN SOCK_BUFFER *Sockbuf
> -  );
> -
> -/**
> -  Get the next buffer block in the specific socket buffer.
> -
> -  @param  Sockbuf               Pointer to the socket buffer.
> -  @param  SockEntry             Pointer to the buffer block prior to the required
> -                                one.
> -
> -  @return Pointer to the buffer block next to SockEntry. NULL if SockEntry is
> -          the tail or head entry.
> -
> -**/
> -NET_BUF *
> -SockBufNext (
> -  IN SOCK_BUFFER *Sockbuf,
> -  IN NET_BUF     *SockEntry
> -  );
> -
> -#endif
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.h
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.h
> deleted file mode 100644
> index 368f49c4ddb1..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.h
> +++ /dev/null
> @@ -1,342 +0,0 @@
> -/** @file
> -  Tcp driver function header.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#ifndef _TCP4_DRIVER_H_
> -#define _TCP4_DRIVER_H_
> -
> -#include <Protocol/ServiceBinding.h>
> -#include <Library/IpIoLib.h>
> -
> -#define TCP4_DRIVER_SIGNATURE   SIGNATURE_32 ('T', 'C', 'P', '4')
> -
> -#define TCP4_PORT_KNOWN         1024
> -#define TCP4_PORT_USER_RESERVED 65535
> -
> -#define TCP4_FROM_THIS(a) \
> -  CR ( \
> -  (a), \
> -  TCP4_SERVICE_DATA, \
> -  Tcp4ServiceBinding, \
> -  TCP4_DRIVER_SIGNATURE \
> -  )
> -
> -///
> -/// TCP heartbeat tick timer.
> -///
> -typedef struct _TCP4_HEARTBEAT_TIMER {
> -  EFI_EVENT  TimerEvent;         ///< The event assoiated with the timer
> -  INTN       RefCnt;             ///< Number of reference
> -} TCP4_HEARTBEAT_TIMER;
> -
> -///
> -/// TCP service data
> -///
> -typedef struct _TCP4_SERVICE_DATA {
> -  UINT32                        Signature;
> -  EFI_HANDLE                    ControllerHandle;
> -  IP_IO                         *IpIo;  // IP Io consumed by TCP4
> -  EFI_SERVICE_BINDING_PROTOCOL  Tcp4ServiceBinding;
> -  EFI_HANDLE                    DriverBindingHandle;
> -  LIST_ENTRY                    SocketList;
> -} TCP4_SERVICE_DATA;
> -
> -///
> -/// TCP protocol data
> -///
> -typedef struct _TCP4_PROTO_DATA {
> -  TCP4_SERVICE_DATA *TcpService;
> -  TCP_CB            *TcpPcb;
> -} TCP4_PROTO_DATA;
> -
> -
> -/**
> -  Packet receive callback function provided to IP_IO, used to call
> -  the proper function to handle the packet received by IP.
> -
> -  @param  Status      Status of the received packet.
> -  @param  IcmpErr     ICMP error number.
> -  @param  NetSession  Pointer to the net session of this packet.
> -  @param  Pkt         Pointer to the recieved packet.
> -  @param  Context     Pointer to the context configured in IpIoOpen(), not used
> -                      now.
> -
> -  @return None
> -
> -**/
> -VOID
> -EFIAPI
> -Tcp4RxCallback (
> -  IN EFI_STATUS                       Status,
> -  IN UINT8                            IcmpErr,
> -  IN EFI_NET_SESSION_DATA             *NetSession,
> -  IN NET_BUF                          *Pkt,
> -  IN VOID                             *Context    OPTIONAL
> -  );
> -
> -/**
> -  Send the segment to IP via IpIo function.
> -
> -  @param  Tcb         Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf        Pointer to the TCP segment to be sent.
> -  @param  Src         Source address of the TCP segment.
> -  @param  Dest        Destination address of the TCP segment.
> -
> -  @retval 0           The segment was sent out successfully.
> -  @retval -1          The segment was failed to send.
> -
> -**/
> -INTN
> -TcpSendIpPacket (
> -  IN TCP_CB    *Tcb,
> -  IN NET_BUF   *Nbuf,
> -  IN UINT32    Src,
> -  IN UINT32    Dest
> -  );
> -
> -/**
> -  The procotol handler provided to the socket layer, used to
> -  dispatch the socket level requests by calling the corresponding
> -  TCP layer functions.
> -
> -  @param  Sock                   Pointer to the socket of this TCP instance.
> -  @param  Request                The code of this operation request.
> -  @param  Data                   Pointer to the operation specific data passed in
> -                                 together with the operation request.
> -
> -  @retval EFI_SUCCESS            The socket request is completed successfully.
> -  @retval other                  The error status returned by the corresponding TCP
> -                                 layer function.
> -
> -**/
> -EFI_STATUS
> -Tcp4Dispatcher (
> -  IN SOCKET                  *Sock,
> -  IN UINT8                   Request,
> -  IN VOID                    *Data    OPTIONAL
> -  );
> -
> -
> -/**
> -  The entry point for Tcp4 driver, used to install Tcp4 driver on the ImageHandle.
> -
> -  @param  ImageHandle   The firmware allocated handle for this
> -                        driver image.
> -  @param  SystemTable   Pointer to the EFI system table.
> -
> -  @retval EFI_SUCCESS   Driver loaded.
> -  @retval other         Driver not loaded.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4DriverEntryPoint (
> -  IN EFI_HANDLE        ImageHandle,
> -  IN EFI_SYSTEM_TABLE  *SystemTable
> -  );
> -
> -
> -/**
> -  Tests to see if this driver supports a given controller.
> -
> -  If a child device is provided, it further tests to see if this driver supports
> -  creating a handle for the specified child device.
> -
> -  @param  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL
> instance.
> -  @param  ControllerHandle     The handle of the controller to test. This handle
> -                               must support a protocol interface that supplies
> -                               an I/O abstraction to the driver.
> -  @param  RemainingDevicePath  A pointer to the remaining portion of a device
> path.
> -                               This parameter is ignored by device drivers, and is optional for
> bus drivers.
> -
> -
> -  @retval EFI_SUCCESS          The device specified by ControllerHandle and
> -                               RemainingDevicePath is supported by the driver
> -                               specified by This.
> -  @retval EFI_ALREADY_STARTED  The device specified by ControllerHandle and
> -                               RemainingDevicePath is already being managed by
> -                               the driver specified by This.
> -  @retval EFI_ACCESS_DENIED    The device specified by ControllerHandle and
> -                               RemainingDevicePath is already being managed by a
> -                               different driver or an application that requires
> -                               exclusive access.
> -  @retval EFI_UNSUPPORTED      The device specified by ControllerHandle and
> -                               RemainingDevicePath is not supported by the driver
> -                               specified by This.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4DriverBindingSupported (
> -  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> -  IN EFI_HANDLE                   ControllerHandle,
> -  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> -  );
> -
> -/**
> -  Start this driver on ControllerHandle.
> -
> -  The Start() function is designed to be invoked from the EFI boot service
> -  ConnectController(). As a result, much of the error checking on the parameters
> -  to Start() has been moved into this common boot service. It is legal to call
> -  Start() from other locations, but the following calling restrictions must be
> -  followed or the system behavior will not be deterministic.
> -  1. ControllerHandle must be a valid EFI_HANDLE.
> -  2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally
> -     aligned EFI_DEVICE_PATH_PROTOCOL.
> -  3. Prior to calling Start(), the Supported() function for the driver specified
> -     by This must have been called with the same calling parameters, and
> Supported()
> -     must have returned EFI_SUCCESS.
> -
> -  @param  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL
> instance.
> -  @param  ControllerHandle     The handle of the controller to start. This handle
> -                               must support a protocol interface that supplies
> -                               an I/O abstraction to the driver.
> -  @param  RemainingDevicePath  A pointer to the remaining portion of a device
> path.
> -                               This parameter is ignored by device drivers, and is
> -                               optional for bus drivers.
> -
> -  @retval EFI_SUCCESS          The device was started.
> -  @retval EFI_ALREADY_STARTED  The device could not be started due to a
> device error.
> -  @retval EFI_OUT_OF_RESOURCES The request could not be completed due to
> a lack
> -                               of resources.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4DriverBindingStart (
> -  IN EFI_DRIVER_BINDING_PROTOCOL  *This,
> -  IN EFI_HANDLE                   ControllerHandle,
> -  IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
> -  );
> -
> -/**
> -  Stop this driver on ControllerHandle.
> -
> -  The Stop() function is designed to be invoked from the EFI boot service
> -  DisconnectController(). As a result, much of the error checking on the
> parameters
> -  to Stop() has been moved into this common boot service. It is legal to call
> Stop()
> -  from other locations, but the following calling restrictions must be followed
> -  or the system behavior will not be deterministic.
> -  1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous
> call
> -     to this same driver's Start() function.
> -  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
> -     EFI_HANDLE. In addition, all of these handles must have been created in this
> -     driver's Start() function, and the Start() function must have called
> OpenProtocol()
> -     on ControllerHandle with an Attribute of
> EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
> -
> -  @param  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL
> instance.
> -  @param  ControllerHandle  A handle to the device being stopped. The handle
> must
> -                            support a bus specific I/O protocol for the driver
> -                            to use to stop the device.
> -  @param  NumberOfChildren  The number of child device handles in
> ChildHandleBuffer.
> -  @param  ChildHandleBuffer An array of child handles to be freed. May be
> NULL if
> -                            NumberOfChildren is 0.
> -
> -  @retval EFI_SUCCESS       The device was stopped.
> -  @retval EFI_DEVICE_ERROR  The device could not be stopped due to a device
> error.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4DriverBindingStop (
> -  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,
> -  IN  EFI_HANDLE                   ControllerHandle,
> -  IN  UINTN                        NumberOfChildren,
> -  IN  EFI_HANDLE                   *ChildHandleBuffer
> -  );
> -
> -/**
> -  Open Ip4 and device path protocols for a created socket, and insert it in
> -  socket list.
> -
> -  @param  This                Pointer to the socket just created
> -  @param  Context             Context of the socket
> -
> -  @retval EFI_SUCCESS         This protocol is installed successfully.
> -  @retval other               Some error occured.
> -
> -**/
> -EFI_STATUS
> -Tcp4CreateSocketCallback (
> -  IN SOCKET  *This,
> -  IN VOID    *Context
> -  );
> -
> -/**
> -  Close Ip4 and device path protocols for a socket, and remove it from socket
> list.
> -
> -  @param  This                Pointer to the socket to be removed
> -  @param  Context             Context of the socket
> -
> -**/
> -VOID
> -Tcp4DestroySocketCallback (
> -  IN SOCKET  *This,
> -  IN VOID    *Context
> -  );
> -
> -/**
> -  Creates a child handle and installs a protocol.
> -
> -  The CreateChild() function installs a protocol on ChildHandle. If ChildHandle
> -  is a pointer to NULL, then a new handle is created and returned in ChildHandle.
> -  If ChildHandle is not a pointer to NULL, then the protocol installs on the
> existing
> -  ChildHandle.
> -
> -  @param  This        Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
> -  @param  ChildHandle Pointer to the handle of the child to create. If it is NULL,
> then
> -                      a new handle is created. If it is a pointer to an existing UEFI
> -                      handle, then the protocol is added to the existing UEFI handle.
> -
> -  @retval EFI_SUCCES            The protocol was added to ChildHandle.
> -  @retval EFI_INVALID_PARAMETER ChildHandle is NULL.
> -  @retval EFI_OUT_OF_RESOURCES  There are not enough resources available
> to create
> -                                the child.
> -  @retval other                 The child handle was not created.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4ServiceBindingCreateChild (
> -  IN     EFI_SERVICE_BINDING_PROTOCOL  *This,
> -  IN OUT EFI_HANDLE                    *ChildHandle
> -  );
> -
> -/**
> -  Destroys a child handle with a protocol installed on it.
> -
> -  The DestroyChild() function does the opposite of CreateChild(). It removes a
> protocol
> -  that was installed by CreateChild() from ChildHandle. If the removed protocol
> is the
> -  last protocol on ChildHandle, then ChildHandle is destroyed.
> -
> -  @param  This         Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
> -  @param  ChildHandle  Handle of the child to destroy
> -
> -  @retval EFI_SUCCES            The protocol was removed from ChildHandle.
> -  @retval EFI_UNSUPPORTED       ChildHandle does not support the protocol
> that is
> -                                being removed.
> -  @retval EFI_INVALID_PARAMETER Child handle is NULL.
> -  @retval EFI_ACCESS_DENIED     The protocol could not be removed from the
> ChildHandle
> -                                because its services are being used.
> -  @retval other                 The child handle was not destroyed.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4ServiceBindingDestroyChild (
> -  IN EFI_SERVICE_BINDING_PROTOCOL  *This,
> -  IN EFI_HANDLE                    ChildHandle
> -  );
> -
> -#endif
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dxe.inf
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dxe.inf
> deleted file mode 100644
> index 7c0504770b48..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dxe.inf
> +++ /dev/null
> @@ -1,94 +0,0 @@
> -## @file
> -#  This module produces EFI TCPv4 Protocol and EFI TCPv4 Service Binding
> Protocol.
> -#
> -#  This module produces EFI TCPv4(Transmission Control Protocol version 4)
> Protocol
> -#  upon EFI IPv4 Protocol, to provide basic TCPv4 I/O services. This driver only
> -#  supports IPv4 network stack.
> -#
> -#  Notes:
> -#  1) This driver can't co-work with the TcpDxe driver in NetworkPkg.
> -#  2) This driver might have some issues that have been fixed in the TcpDxe
> driver
> -#     in NetworkPkg.
> -#  3) This driver supports fewer features than the TcpDxe driver in NetworkPkg
> (e.g. IPv6,
> -#     TCP Cancel function).
> -#  4) TcpDxe driver in NetworkPkg is recommended for use instead of this one
> even though
> -#     both of them can be used.
> -#
> -#  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
> -#  This program and the accompanying materials
> -#  are licensed and made available under the terms and conditions of the BSD
> License
> -#  which accompanies this distribution. The full text of the license may be found
> at
> -#  http://opensource.org/licenses/bsd-license.php
> -#
> -#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> BASIS,
> -#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS OR IMPLIED.
> -#
> -#
> -##
> -
> -[Defines]
> -  INF_VERSION                    = 0x00010005
> -  BASE_NAME                      = Tcp4Dxe
> -  MODULE_UNI_FILE                = Tcp4Dxe.uni
> -  FILE_GUID                      = 6d6963ab-906d-4a65-a7ca-bd40e5d6af4d
> -  MODULE_TYPE                    = UEFI_DRIVER
> -  VERSION_STRING                 = 1.0
> -  ENTRY_POINT                    = Tcp4DriverEntryPoint
> -  UNLOAD_IMAGE                   = NetLibDefaultUnload
> -#
> -# The following information is for reference only and not required by the build
> tools.
> -#
> -#  VALID_ARCHITECTURES           = IA32 X64 EBC
> -#
> -#  DRIVER_BINDING                =  mTcp4DriverBinding
> -#  COMPONENT_NAME                =  gTcp4ComponentName
> -#  COMPONENT_NAME2               =  gTcp4ComponentName2
> -#
> -
> -[Sources]
> -  SockImpl.c
> -  SockInterface.c
> -  Tcp4Proto.h
> -  Tcp4Main.h
> -  SockImpl.h
> -  Tcp4Output.c
> -  Tcp4Timer.c
> -  Tcp4Option.h
> -  Tcp4Dispatcher.c
> -  Tcp4Input.c
> -  Tcp4Misc.c
> -  Tcp4Main.c
> -  Socket.h
> -  ComponentName.c
> -  Tcp4Driver.h
> -  Tcp4Io.c
> -  Tcp4Driver.c
> -  Tcp4Func.h
> -  Tcp4Option.c
> -
> -
> -[Packages]
> -  MdePkg/MdePkg.dec
> -  MdeModulePkg/MdeModulePkg.dec
> -
> -[LibraryClasses]
> -  UefiLib
> -  UefiBootServicesTableLib
> -  UefiDriverEntryPoint
> -  UefiRuntimeServicesTableLib
> -  BaseMemoryLib
> -  MemoryAllocationLib
> -  DebugLib
> -  NetLib
> -  IpIoLib
> -  DevicePathLib
> -  DpcLib
> -
> -[Protocols]
> -  gEfiTcp4ServiceBindingProtocolGuid            ## BY_START
> -  gEfiIp4ServiceBindingProtocolGuid             ## TO_START
> -  gEfiTcp4ProtocolGuid                          ## BY_START
> -  gEfiIp4ProtocolGuid                           ## TO_START
> -
> -[UserExtensions.TianoCore."ExtraFiles"]
> -  Tcp4DxeExtra.uni
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dxe.uni
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dxe.uni
> deleted file mode 100644
> index 1514a3917766..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dxe.uni
> +++ /dev/null
> @@ -1,23 +0,0 @@
> -// /** @file
> -// This module produces EFI TCPv4 Protocol and EFI TCPv4 Service Binding
> Protocol.
> -//
> -// This module produces EFI TCPv4(Transmission Control Protocol version 4)
> Protocol
> -// upon EFI IPv4 Protocol, to provide basic TCPv4 I/O services.
> -//
> -// Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
> -//
> -// This program and the accompanying materials
> -// are licensed and made available under the terms and conditions of the BSD
> License
> -// which accompanies this distribution. The full text of the license may be found
> at
> -// http://opensource.org/licenses/bsd-license.php
> -//
> -// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> BASIS,
> -// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS OR IMPLIED.
> -//
> -// **/
> -
> -
> -#string STR_MODULE_ABSTRACT             #language en-US "Produces EFI TCPv4
> Protocol and EFI TCPv4 Service Binding Protocol"
> -
> -#string STR_MODULE_DESCRIPTION          #language en-US "This module
> produces EFI TCPv4(Transmission Control Protocol version 4) Protocol upon EFI
> IPv4 Protocol to provide basic TCPv4 I/O services."
> -
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4DxeExtra.uni
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4DxeExtra.uni
> deleted file mode 100644
> index 0e6d2f2896f3..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4DxeExtra.uni
> +++ /dev/null
> @@ -1,20 +0,0 @@
> -// /** @file
> -// Tcp4Dxe Localized Strings and Content
> -//
> -// Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
> -//
> -// This program and the accompanying materials
> -// are licensed and made available under the terms and conditions of the BSD
> License
> -// which accompanies this distribution. The full text of the license may be found
> at
> -// http://opensource.org/licenses/bsd-license.php
> -//
> -// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> BASIS,
> -// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS OR IMPLIED.
> -//
> -// **/
> -
> -#string STR_PROPERTIES_MODULE_NAME
> -#language en-US
> -"TCP v4 DXE Driver"
> -
> -
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Func.h
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Func.h
> deleted file mode 100644
> index 53b7aac8ae98..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Func.h
> +++ /dev/null
> @@ -1,781 +0,0 @@
> -/** @file
> -  Tcp function header file.
> -
> -Copyright (c) 2005 - 2014, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#ifndef _TCP4_FUNC_H_
> -#define _TCP4_FUNC_H_
> -
> -//
> -// Declaration of all the functions in TCP
> -// protocol. It is intended to keep tcp.h
> -// clear.
> -//
> -
> -//
> -// Functions in tcp.c
> -//
> -
> -/**
> -  Try to find one Tcb whose <Ip, Port> equals to <IN Addr, IN Port>.
> -
> -  @param  Addr                  Pointer to the IP address needs to match.
> -  @param  Port                  The port number needs to match.
> -
> -  @return  The Tcb which matches the <Addr Port> paire exists or not.
> -
> -**/
> -BOOLEAN
> -TcpFindTcbByPeer (
> -  IN EFI_IPv4_ADDRESS  *Addr,
> -  IN TCP_PORTNO        Port
> -  );
> -
> -/**
> -  Locate the TCP_CB related to the socket pair.
> -
> -  @param  LocalPort             The local port number.
> -  @param  LocalIp               The local IP address.
> -  @param  RemotePort            The remote port number.
> -  @param  RemoteIp              The remote IP address.
> -  @param  Syn                   Whether to search the listen sockets, if TRUE, the
> -                                listen sockets are searched.
> -
> -  @return  Pointer to the related TCP_CB, if NULL no match is found.
> -
> -**/
> -TCP_CB *
> -TcpLocateTcb (
> -  IN TCP_PORTNO  LocalPort,
> -  IN UINT32      LocalIp,
> -  IN TCP_PORTNO  RemotePort,
> -  IN UINT32      RemoteIp,
> -  IN BOOLEAN     Syn
> -  );
> -
> -/**
> -  Insert a Tcb into the proper queue.
> -
> -  @param  Tcb                   Pointer to the TCP_CB to be inserted.
> -
> -  @retval 0                     The Tcb is inserted successfully.
> -  @retval -1                    Error condition occurred.
> -
> -**/
> -INTN
> -TcpInsertTcb (
> -  IN TCP_CB *Tcb
> -  );
> -
> -/**
> -  Clone a TCP_CB from Tcb.
> -
> -  @param  Tcb                   Pointer to the TCP_CB to be cloned.
> -
> -  @return  Pointer to the new cloned TCP_CB, if NULL error condition occurred.
> -
> -**/
> -TCP_CB *
> -TcpCloneTcb (
> -  IN TCP_CB *Tcb
> -  );
> -
> -/**
> -  Compute an ISS to be used by a new connection.
> -
> -  @return  The result ISS.
> -
> -**/
> -TCP_SEQNO
> -TcpGetIss (
> -  VOID
> -  );
> -
> -/**
> -  Initialize the Tcb local related members.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpInitTcbLocal (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Initialize the peer related members.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -  @param  Seg                   Pointer to the segment that contains the peer's
> -                                intial info.
> -  @param  Opt                   Pointer to the options announced by the peer.
> -
> -**/
> -VOID
> -TcpInitTcbPeer (
> -  IN OUT TCP_CB     *Tcb,
> -  IN     TCP_SEG    *Seg,
> -  IN     TCP_OPTION *Opt
> -  );
> -
> -/**
> -  Get the local mss.
> -
> -  @param  Sock        Pointer to the socket to get mss
> -
> -  @return  The mss size.
> -
> -**/
> -UINT16
> -TcpGetRcvMss (
> -  IN SOCKET  *Sock
> -  );
> -
> -/**
> -  Set the Tcb's state.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -  @param  State                 The state to be set.
> -
> -**/
> -VOID
> -TcpSetState (
> -  IN OUT TCP_CB    *Tcb,
> -  IN     UINT8     State
> -  );
> -
> -//
> -// Functions in Tcp4Output.c
> -//
> -/**
> -  Send the segment to IP via IpIo function.
> -
> -  @param  Tcb         Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf        Pointer to the TCP segment to be sent.
> -  @param  Src         Source address of the TCP segment.
> -  @param  Dest        Destination address of the TCP segment.
> -
> -  @retval 0           The segment was sent out successfully.
> -  @retval -1          The segment was failed to send.
> -
> -**/
> -INTN
> -TcpSendIpPacket (
> -  IN TCP_CB    *Tcb,
> -  IN NET_BUF   *Nbuf,
> -  IN UINT32    Src,
> -  IN UINT32    Dest
> -  );
> -
> -/**
> -  Check whether to send data/SYN/FIN and piggy back an ACK.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Force   Whether to ignore the sender's SWS avoidance algorithm and
> send
> -                  out data by force.
> -
> -  @return The number of bytes sent.
> -
> -**/
> -INTN
> -TcpToSendData (
> -  IN OUT TCP_CB *Tcb,
> -  IN     INTN Force
> -  );
> -
> -/**
> -  Check whether to send an ACK or delayed ACK.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpToSendAck (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Send an ACK immediately.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpSendAck (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Send a zero probe segment. It can be used by keepalive and zero window
> probe.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -  @retval 0       The zero probe segment was sent out successfully.
> -  @retval other   Error condition occurred.
> -
> -**/
> -INTN
> -TcpSendZeroProbe (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Process the data and FIN flag, check whether to deliver
> -  data to the socket layer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -  @retval 0        No error occurred to deliver data.
> -  @retval -1       Error condition occurred. Proper response is to reset the
> -                   connection.
> -
> -**/
> -INTN
> -TcpDeliverData (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Send a RESET segment in response to the segment received.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance, may be NULL.
> -  @param  Head    TCP header of the segment that triggers the reset.
> -  @param  Len     Length of the segment that triggers the reset.
> -  @param  Local   Local IP address.
> -  @param  Remote  Remote peer's IP address.
> -
> -  @retval 0       A reset is sent or no need to send it.
> -  @retval -1      No reset is sent.
> -
> -**/
> -INTN
> -TcpSendReset (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_HEAD  *Head,
> -  IN INT32     Len,
> -  IN UINT32    Local,
> -  IN UINT32    Remote
> -  );
> -
> -/**
> -  Compute the sequence space left in the old receive window.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -  @return The sequence space left in the old receive window.
> -
> -**/
> -UINT32
> -TcpRcvWinOld (
> -  IN TCP_CB *Tcb
> -  );
> -
> -/**
> -  Compute the current receive window.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -  @return The size of the current receive window, in bytes.
> -
> -**/
> -UINT32
> -TcpRcvWinNow (
> -  IN TCP_CB *Tcb
> -  );
> -
> -/**
> -  Retransmit the segment from sequence Seq.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Seq     The sequence number of the segment to be retransmitted.
> -
> -  @retval 0       Retransmission succeeded.
> -  @retval -1      Error condition occurred.
> -
> -**/
> -INTN
> -TcpRetransmit (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_SEQNO Seq
> -  );
> -
> -/**
> -  Compute how much data to send.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Force   Whether to ignore the sender's SWS avoidance algorithm and
> send
> -                  out data by force.
> -
> -  @return The length of the data can be sent, if 0, no data can be sent.
> -
> -**/
> -UINT32
> -TcpDataToSend (
> -  IN TCP_CB *Tcb,
> -  IN INTN   Force
> -  );
> -
> -/**
> -  Verify that the segment is in good shape.
> -
> -  @param  Nbuf    Buffer that contains the segment to be checked.
> -
> -  @retval 0       The segment is broken.
> -  @retval 1       The segment is in good shape.
> -
> -**/
> -INTN
> -TcpVerifySegment (
> -  IN NET_BUF *Nbuf
> -  );
> -
> -/**
> -  Verify that all the segments in SndQue are in good shape.
> -
> -  @param  Head    Pointer to the head node of the SndQue.
> -
> -  @retval 0       At least one segment is broken.
> -  @retval 1       All segments in the specific queue are in good shape.
> -
> -**/
> -INTN
> -TcpCheckSndQue (
> -  IN LIST_ENTRY     *Head
> -  );
> -
> -/**
> -  Get a segment from the Tcb's SndQue.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Seq     The sequence number of the segment.
> -  @param  Len     The maximum length of the segment.
> -
> -  @return Pointer to the segment, if NULL some error occurred.
> -
> -**/
> -NET_BUF *
> -TcpGetSegmentSndQue (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_SEQNO Seq,
> -  IN UINT32    Len
> -  );
> -
> -/**
> -  Get a segment from the Tcb's socket buffer.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Seq     The sequence number of the segment.
> -  @param  Len     The maximum length of the segment.
> -
> -  @return Pointer to the segment, if NULL some error occurred.
> -
> -**/
> -NET_BUF *
> -TcpGetSegmentSock (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_SEQNO Seq,
> -  IN UINT32    Len
> -  );
> -
> -/**
> -  Get a segment starting from sequence Seq of a maximum
> -  length of Len.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Seq     The sequence number of the segment.
> -  @param  Len     The maximum length of the segment.
> -
> -  @return Pointer to the segment, if NULL some error occurred.
> -
> -**/
> -NET_BUF *
> -TcpGetSegment (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_SEQNO Seq,
> -  IN UINT32    Len
> -  );
> -
> -/**
> -  Get the maximum SndNxt.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -  @return The sequence number of the maximum SndNxt.
> -
> -**/
> -TCP_SEQNO
> -TcpGetMaxSndNxt (
> -  IN TCP_CB *Tcb
> -  );
> -
> -//
> -// Functions from Tcp4Input.c
> -//
> -/**
> -  Process the received ICMP error messages for TCP.
> -
> -  @param  Nbuf     Buffer that contains part of the TCP segment without IP
> header
> -                   truncated from the ICMP error packet.
> -  @param  IcmpErr  The ICMP error code interpreted from ICMP error packet.
> -  @param  Src      Source address of the ICMP error message.
> -  @param  Dst      Destination address of the ICMP error message.
> -
> -**/
> -VOID
> -TcpIcmpInput (
> -  IN NET_BUF     *Nbuf,
> -  IN UINT8       IcmpErr,
> -  IN UINT32      Src,
> -  IN UINT32      Dst
> -  );
> -
> -/**
> -  Process the received TCP segments.
> -
> -  @param  Nbuf     Buffer that contains received TCP segment without IP header.
> -  @param  Src      Source address of the segment, or the peer's IP address.
> -  @param  Dst      Destination address of the segment, or the local end's IP
> -                   address.
> -
> -  @retval 0        Segment is processed successfully. It is either accepted or
> -                   discarded. But no connection is reset by the segment.
> -  @retval -1       A connection is reset by the segment.
> -
> -**/
> -INTN
> -TcpInput (
> -  IN NET_BUF *Nbuf,
> -  IN UINT32  Src,
> -  IN UINT32  Dst
> -  );
> -
> -/**
> -  Check whether the sequence number of the incoming segment is acceptable.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Seg      Pointer to the incoming segment.
> -
> -  @retval 1       The sequence number is acceptable.
> -  @retval 0       The sequence number is not acceptable.
> -
> -**/
> -INTN
> -TcpSeqAcceptable (
> -  IN TCP_CB  *Tcb,
> -  IN TCP_SEG *Seg
> -  );
> -
> -/**
> -  NewReno fast recovery, RFC3782.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Seg      Segment that triggers the fast recovery.
> -
> -**/
> -VOID
> -TcpFastRecover (
> -  IN OUT TCP_CB  *Tcb,
> -  IN     TCP_SEG *Seg
> -  );
> -
> -/**
> -  NewReno fast loss recovery, RFC3792.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Seg      Segment that triggers the fast loss recovery.
> -
> -**/
> -VOID
> -TcpFastLossRecover (
> -  IN OUT TCP_CB  *Tcb,
> -  IN     TCP_SEG *Seg
> -  );
> -
> -/**
> -  Compute the RTT as specified in RFC2988.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Measure  Currently measured RTT in heart beats.
> -
> -**/
> -VOID
> -TcpComputeRtt (
> -  IN OUT TCP_CB *Tcb,
> -  IN     UINT32 Measure
> -  );
> -
> -/**
> -  Trim off the data outside the tcb's receive window.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf     Pointer to the NET_BUF containing the received tcp segment.
> -
> -**/
> -VOID
> -TcpTrimInWnd (
> -  IN TCP_CB  *Tcb,
> -  IN NET_BUF *Nbuf
> -  );
> -
> -/**
> -  Store the data into the reassemble queue.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf     Pointer to the buffer containing the data to be queued.
> -
> -**/
> -VOID
> -TcpQueueData (
> -  IN OUT TCP_CB  *Tcb,
> -  IN     NET_BUF *Nbuf
> -  );
> -
> -/**
> -  Ajust the send queue or the retransmit queue.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Ack      The acknowledge seuqence number of the received segment.
> -
> -**/
> -VOID
> -TcpAdjustSndQue (
> -  IN TCP_CB    *Tcb,
> -  IN TCP_SEQNO Ack
> -  );
> -
> -//
> -// Functions from Tcp4Misc.c
> -//
> -/**
> -  Compute the TCP segment's checksum.
> -
> -  @param  Nbuf                  Pointer to the buffer that contains the TCP
> -                                segment.
> -  @param  HeadSum               The checksum value of the fixed part of pseudo
> -                                header.
> -
> -  @return  The checksum value.
> -
> -**/
> -UINT16
> -TcpChecksum (
> -  IN NET_BUF *Nbuf,
> -  IN UINT16  HeadSum
> -  );
> -
> -/**
> -  Translate the information from the head of the received TCP
> -  segment Nbuf contains and fill it into a TCP_SEG structure.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf                  Pointer to the buffer contains the TCP segment.
> -
> -  @return  Pointer to the TCP_SEG that contains the translated TCP head
> information.
> -
> -**/
> -TCP_SEG *
> -TcpFormatNetbuf (
> -  IN     TCP_CB  *Tcb,
> -  IN OUT NET_BUF *Nbuf
> -  );
> -
> -/**
> -  Initialize an active connection.
> -
> -  @param  Tcb                   Pointer to the TCP_CB that wants to initiate a
> -                                connection.
> -
> -**/
> -VOID
> -TcpOnAppConnect (
> -  IN OUT TCP_CB  *Tcb
> -  );
> -
> -/**
> -  Application has consumed some data, check whether
> -  to send a window updata ack or a delayed ack.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpOnAppConsume (
> -  IN TCP_CB *Tcb
> -  );
> -
> -/**
> -  Initiate the connection close procedure, called when
> -  applications want to close the connection.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpOnAppClose (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Check whether the application's newly delivered data can be sent out.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of this TCP instance.
> -
> -  @retval 0                     Whether the data is sent out or is buffered for
> -                                further sending.
> -  @retval -1                    The Tcb is not in a state that data is permitted to
> -                                be sent out.
> -
> -**/
> -INTN
> -TcpOnAppSend (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Abort the connection by sending a reset segment, called
> -  when the application wants to abort the connection.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of the TCP instance.
> -
> -**/
> -VOID
> -TcpOnAppAbort (
> -  IN TCP_CB *Tcb
> -  );
> -
> -/**
> -  Reset the connection related with Tcb.
> -
> -  @param  Tcb                   Pointer to the TCP_CB of the connection to be
> -                                reset.
> -
> -**/
> -VOID
> -TcpResetConnection (
> -  IN TCP_CB *Tcb
> -  );
> -
> -//
> -// Functions in Tcp4Timer.c
> -//
> -/**
> -  Close the TCP connection.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpClose (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Heart beat timer handler, queues the DPC at TPL_CALLBACK.
> -
> -  @param  Event    Timer event signaled, ignored.
> -  @param  Context  Context of the timer event, ignored.
> -
> -**/
> -VOID
> -EFIAPI
> -TcpTicking (
> -  IN EFI_EVENT Event,
> -  IN VOID      *Context
> -  );
> -
> -/**
> -  Enable a TCP timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Timer    The index of the timer to be enabled.
> -  @param  TimeOut  The timeout value of this timer.
> -
> -**/
> -VOID
> -TcpSetTimer (
> -  IN OUT TCP_CB *Tcb,
> -  IN     UINT16 Timer,
> -  IN     UINT32 TimeOut
> -  );
> -
> -/**
> -  Clear one TCP timer.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -  @param  Timer    The index of the timer to be cleared.
> -
> -**/
> -VOID
> -TcpClearTimer (
> -  IN OUT TCP_CB *Tcb,
> -  IN     UINT16 Timer
> -  );
> -
> -/**
> -  Clear all TCP timers.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpClearAllTimer (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Enable the window prober timer and set the timeout value.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpSetProbeTimer (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Enable the keepalive timer and set the timeout value.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpSetKeepaliveTimer (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Backoff the RTO.
> -
> -  @param  Tcb      Pointer to the TCP_CB of this TCP instance.
> -
> -**/
> -VOID
> -TcpBackoffRto (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -/**
> -  Install the device path protocol on the TCP instance.
> -
> -  @param  Sock             Pointer to the socket representing the TCP instance.
> -
> -  @retval  EFI_SUCCESS     The device path protocol is installed.
> -  @retval  other           Failed to install the device path protocol.
> -
> -**/
> -EFI_STATUS
> -TcpInstallDevicePath (
> -  IN SOCKET *Sock
> -  );
> -
> -#endif
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.h
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.h
> deleted file mode 100644
> index c898a7ee2dd0..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.h
> +++ /dev/null
> @@ -1,494 +0,0 @@
> -/** @file
> -  TCP4 protocol services header file.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#ifndef _TCP4_MAIN_H_
> -#define _TCP4_MAIN_H_
> -
> -#include "Socket.h"
> -
> -#include "Tcp4Proto.h"
> -#include "Tcp4Func.h"
> -#include "Tcp4Driver.h"
> -
> -
> -extern UINT16  mTcp4RandomPort;
> -extern CHAR16  *mTcpStateName[];
> -
> -//
> -// Driver Produced Protocol Prototypes
> -//
> -
> -//
> -// Function prototype for the Tcp4 socket request handler
> -//
> -/**
> -  The procotol handler provided to the socket layer, used to
> -  dispatch the socket level requests by calling the corresponding
> -  TCP layer functions.
> -
> -  @param  Sock                   Pointer to the socket of this TCP instance.
> -  @param  Request                The code of this operation request.
> -  @param  Data                   Pointer to the operation specific data passed in
> -                                 together with the operation request.
> -
> -  @retval EFI_SUCCESS            The socket request is completed successfully.
> -  @retval other                  The error status returned by the corresponding TCP
> -                                 layer function.
> -
> -**/
> -EFI_STATUS
> -Tcp4Dispatcher (
> -  IN SOCKET                  *Sock,
> -  IN UINT8                   Request,
> -  IN VOID                    *Data    OPTIONAL
> -  );
> -
> -///
> -/// TCP mode data
> -///
> -typedef struct _TCP4_MODE_DATA {
> -  EFI_TCP4_CONNECTION_STATE       *Tcp4State;
> -  EFI_TCP4_CONFIG_DATA            *Tcp4ConfigData;
> -  EFI_IP4_MODE_DATA               *Ip4ModeData;
> -  EFI_MANAGED_NETWORK_CONFIG_DATA *MnpConfigData;
> -  EFI_SIMPLE_NETWORK_MODE         *SnpModeData;
> -} TCP4_MODE_DATA;
> -
> -///
> -/// TCP route infomation data
> -///
> -typedef struct _TCP4_ROUTE_INFO {
> -  BOOLEAN           DeleteRoute;
> -  EFI_IPv4_ADDRESS  *SubnetAddress;
> -  EFI_IPv4_ADDRESS  *SubnetMask;
> -  EFI_IPv4_ADDRESS  *GatewayAddress;
> -} TCP4_ROUTE_INFO;
> -
> -typedef struct {
> -  EFI_SERVICE_BINDING_PROTOCOL  *ServiceBinding;
> -  UINTN                         NumberOfChildren;
> -  EFI_HANDLE                    *ChildHandleBuffer;
> -} TCP4_DESTROY_CHILD_IN_HANDLE_BUF_CONTEXT;
> -
> -/**
> -  Get the current operational status of a TCP instance.
> -
> -  The GetModeData() function copies the current operational settings of this
> -  EFI TCPv4 Protocol instance into user-supplied buffers. This function can
> -  also be used to retrieve the operational setting of underlying drivers
> -  such as IPv4, MNP, or SNP.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  Tcp4State                Pointer to the buffer to receive the current TCP
> -                                   state.
> -  @param  Tcp4ConfigData           Pointer to the buffer to receive the current
> TCP
> -                                   configuration.
> -  @param  Ip4ModeData              Pointer to the buffer to receive the current
> IPv4
> -                                   configuration data used by the TCPv4 instance.
> -  @param  MnpConfigData            Pointer to the buffer to receive the current
> MNP
> -                                   configuration data indirectly used by the TCPv4
> -                                   Instance.
> -  @param  SnpModeData              Pointer to the buffer to receive the current
> SNP
> -                                   configuration data indirectly used by the TCPv4
> -                                   Instance.
> -
> -  @retval EFI_SUCCESS              The mode data was read.
> -  @retval EFI_NOT_STARTED          No configuration data is available because
> this
> -                                   instance hasn't been started.
> -  @retval EFI_INVALID_PARAMETER    This is NULL.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4GetModeData (
> -  IN      EFI_TCP4_PROTOCOL                  *This,
> -     OUT  EFI_TCP4_CONNECTION_STATE          *Tcp4State       OPTIONAL,
> -     OUT  EFI_TCP4_CONFIG_DATA               *Tcp4ConfigData  OPTIONAL,
> -     OUT  EFI_IP4_MODE_DATA                  *Ip4ModeData     OPTIONAL,
> -     OUT  EFI_MANAGED_NETWORK_CONFIG_DATA    *MnpConfigData
> OPTIONAL,
> -     OUT  EFI_SIMPLE_NETWORK_MODE            *SnpModeData     OPTIONAL
> -  );
> -
> -
> -/**
> -  Initialize or brutally reset the operational parameters for
> -  this EFI TCPv4 instance.
> -
> -  The Configure() function does the following:
> -  * Initialize this EFI TCPv4 instance, i.e., initialize the communication end
> -  setting, specify active open or passive open for an instance.
> -  * Reset this TCPv4 instance brutally, i.e., cancel all pending asynchronous
> -  tokens, flush transmission and receiving buffer directly without informing
> -  the communication peer.
> -  No other TCPv4 Protocol operation can be executed by this instance
> -  until it is configured properly. For an active TCP4 instance, after a proper
> -  configuration it may call Connect() to initiates the three-way handshake.
> -  For a passive TCP4 instance, its state will transit to Tcp4StateListen after
> -  configuration, and Accept() may be called to listen the incoming TCP
> connection
> -  request. If TcpConfigData is set to NULL, the instance is reset. Resetting
> -  process will be done brutally, the state machine will be set to Tcp4StateClosed
> -  directly, the receive queue and transmit queue will be flushed, and no traffic is
> -  allowed through this instance.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  TcpConfigData            Pointer to the configure data to configure the
> -                                   instance.
> -
> -  @retval EFI_SUCCESS              The operational settings are set, changed, or
> -                                   reset successfully.
> -  @retval EFI_NO_MAPPING           When using a default address, configuration
> -                                   (through DHCP, BOOTP, RARP, etc.) is not
> -                                   finished.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_ACCESS_DENIED        Configuring TCP instance when it is already
> -                                   configured.
> -  @retval EFI_DEVICE_ERROR         An unexpected network or system error
> occurred.
> -  @retval EFI_UNSUPPORTED          One or more of the control options are not
> -                                   supported in the implementation.
> -  @retval EFI_OUT_OF_RESOURCES     Could not allocate enough system
> resources.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Configure (
> -  IN EFI_TCP4_PROTOCOL        *This,
> -  IN EFI_TCP4_CONFIG_DATA     *TcpConfigData     OPTIONAL
> -  );
> -
> -/**
> -  Add or delete routing entries.
> -
> -  The Routes() function adds or deletes a route from the instance's routing table.
> -  The most specific route is selected by comparing the SubnetAddress with the
> -  destination IP address's arithmetical AND to the SubnetMask.
> -  The default route is added with both SubnetAddress and SubnetMask set to
> 0.0.0.0.
> -  The default route matches all destination IP addresses if there is no more
> specific route.
> -  Direct route is added with GatewayAddress set to 0.0.0.0. Packets are sent to
> -  the destination host if its address can be found in the Address Resolution
> Protocol (ARP)
> -  cache or it is on the local subnet. If the instance is configured to use default
> -  address, a direct route to the local network will be added automatically.
> -  Each TCP instance has its own independent routing table. Instance that uses
> the
> -  default IP address will have a copy of the EFI_IP4_CONFIG_PROTOCOL's
> routing table.
> -  The copy will be updated automatically whenever the IP driver reconfigures its
> -  instance. As a result, the previous modification to the instance's local copy
> -  will be lost. The priority of checking the route table is specific with IP
> -  implementation and every IP implementation must comply with RFC 1122.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  DeleteRoute              If TRUE, delete the specified route from routing
> -                                   table; if FALSE, add the specified route to
> -                                   routing table.
> -                                   DestinationAddress and SubnetMask are used as
> -                                   the keywords to search route entry.
> -  @param  SubnetAddress            The destination network.
> -  @param  SubnetMask               The subnet mask for the destination network.
> -  @param  GatewayAddress           The gateway address for this route.
> -                                   It must be on the same subnet with the station
> -                                   address unless a direct route is specified.
> -
> -  @retval EFI_SUCCESS              The operation completed successfully.
> -  @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance has not
> been
> -                                   configured.
> -  @retval EFI_NO_MAPPING           When using a default address, configuration
> -                                   (through DHCP, BOOTP, RARP, etc.) is not
> -                                   finished.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_OUT_OF_RESOURCES     Could not allocate enough resources to
> add the
> -                                   entry to the routing table.
> -  @retval EFI_NOT_FOUND            This route is not in the routing table.
> -  @retval EFI_ACCESS_DENIED        This route is already in the routing table.
> -  @retval EFI_UNSUPPORTED          The TCP driver does not support this
> operation.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Routes (
> -  IN EFI_TCP4_PROTOCOL           *This,
> -  IN BOOLEAN                     DeleteRoute,
> -  IN EFI_IPv4_ADDRESS            *SubnetAddress,
> -  IN EFI_IPv4_ADDRESS            *SubnetMask,
> -  IN EFI_IPv4_ADDRESS            *GatewayAddress
> -  );
> -
> -/**
> -  Initiate a nonblocking TCP connection request for an active TCP instance.
> -
> -  The Connect() function will initiate an active open to the remote peer
> configured
> -  in current TCP instance if it is configured active. If the connection succeeds
> -  or fails due to any error, the ConnectionToken->CompletionToken.Event will
> be
> -  signaled and ConnectionToken->CompletionToken.Status will be updated
> accordingly.
> -  This function can only be called for the TCP instance in Tcp4StateClosed state.
> -  The instance will transfer into Tcp4StateSynSent if the function returns
> EFI_SUCCESS.
> -  If TCP three way handshake succeeds, its state will become
> Tcp4StateEstablished,
> -  otherwise, the state will return to Tcp4StateClosed.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance
> -  @param  ConnectionToken          Pointer to the connection token to return
> when
> -                                   the TCP three way handshake finishes.
> -
> -  @retval EFI_SUCCESS              The connection request is successfully initiated
> -                                   and the state of this TCPv4 instance has
> -                                   been changed to Tcp4StateSynSent.
> -  @retval EFI_NOT_STARTED          This EFI_TCP4_PROTOCOL instance hasn't
> been
> -                                   configured.
> -  @retval EFI_ACCESS_DENIED        The instance is not configured as an active
> one
> -                                   or it is not in Tcp4StateClosed state.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_OUT_OF_RESOURCES     The driver can't allocate enough
> resource to
> -                                   initiate the active open.
> -  @retval EFI_DEVICE_ERROR         An unexpected system or network error
> occurred.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Connect (
> -  IN EFI_TCP4_PROTOCOL           *This,
> -  IN EFI_TCP4_CONNECTION_TOKEN   *ConnectionToken
> -  );
> -
> -/**
> -  Listen on the passive instance to accept an incoming connection request.
> -
> -  The Accept() function initiates an asynchronous accept request to wait for an
> -  incoming connection on the passive TCP instance. If a remote peer
> successfully
> -  establishes a connection with this instance, a new TCP instance will be created
> -  and its handle will be returned in ListenToken->NewChildHandle. The newly
> created
> -  instance is configured by inheriting the passive instance's configuration and is
> -  ready for use upon return. The instance is in the Tcp4StateEstablished state.
> -  The ListenToken->CompletionToken.Event will be signaled when a new
> connection
> -  is accepted, user aborts the listen or connection is reset. This function only
> -  can be called when current TCP instance is in Tcp4StateListen state.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance
> -  @param  ListenToken              Pointer to the listen token to return when
> -                                   operation finishes.
> -
> -  @retval EFI_SUCCESS              The listen token has been queued successfully.
> -  @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance hasn't
> been
> -                                   configured.
> -  @retval EFI_ACCESS_DENIED        The instatnce is not a passive one or it is not
> -                                   in Tcp4StateListen state or a same listen token
> -                                   has already existed in the listen token queue of
> -                                   this TCP instance.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_OUT_OF_RESOURCES     Could not allocate enough resources to
> finish
> -                                   the operation.
> -  @retval EFI_DEVICE_ERROR         Any unexpected and not belonged to above
> category error.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Accept (
> -  IN EFI_TCP4_PROTOCOL             *This,
> -  IN EFI_TCP4_LISTEN_TOKEN         *ListenToken
> -  );
> -
> -/**
> -  Queues outgoing data into the transmit queue.
> -
> -  The Transmit() function queues a sending request to this TCPv4 instance along
> -  with the user data. The status of the token is updated and the event in the
> token
> -  will be signaled once the data is sent out or some error occurs.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance
> -  @param  Token                    Pointer to the completion token to queue to the
> -                                   transmit queue
> -
> -  @retval EFI_SUCCESS              The data has been queued for transmission.
> -  @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance hasn't
> been
> -                                   configured.
> -  @retval EFI_NO_MAPPING           When using a default address, configuration
> -                                   (DHCP, BOOTP, RARP, etc.) is not finished yet.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_ACCESS_DENIED        One or more of the following conditions is
> TRUE:
> -                                   * A transmit completion token with the same
> -                                     Token-> CompletionToken.Event was already in the
> -                                     transmission queue.
> -                                   * The current instance is in Tcp4StateClosed state
> -                                   * The current instance is a passive one and
> -                                     it is in Tcp4StateListen state.
> -                                   * User has called Close() to disconnect this
> -                                     connection.
> -  @retval EFI_NOT_READY            The completion token could not be queued
> because
> -                                   the transmit queue is full.
> -  @retval EFI_OUT_OF_RESOURCES     Could not queue the transmit data
> because of
> -                                   resource shortage.
> -  @retval EFI_NETWORK_UNREACHABLE  There is no route to the destination
> network or
> -                                   address.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Transmit (
> -  IN EFI_TCP4_PROTOCOL            *This,
> -  IN EFI_TCP4_IO_TOKEN            *Token
> -  );
> -
> -/**
> -  Place an asynchronous receive request into the receiving queue.
> -
> -  The Receive() function places a completion token into the receive packet
> queue.
> -  This function is always asynchronous. The caller must allocate the
> -  Token->CompletionToken.Event and the FragmentBuffer used to receive data.
> He also
> -  must fill the DataLength which represents the whole length of all
> FragmentBuffer.
> -  When the receive operation completes, the EFI TCPv4 Protocol driver updates
> the
> -  Token->CompletionToken.Status and Token->Packet.RxData fields and the
> -  Token->CompletionToken.Event is signaled. If got data the data and its length
> -  will be copy into the FragmentTable, in the same time the full length of
> received
> -  data will be recorded in the DataLength fields. Providing a proper notification
> -  function and context for the event will enable the user to receive the
> notification
> -  and receiving status. That notification function is guaranteed to not be re-
> entered.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  Token                    Pointer to a token that is associated with the
> -                                   receive data descriptor.
> -
> -  @retval EFI_SUCCESS              The receive completion token was cached.
> -  @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance hasn't
> been
> -                                   configured.
> -  @retval EFI_NO_MAPPING           When using a default address, configuration
> -                                   (DHCP, BOOTP, RARP, etc.) is not finished yet.
> -  @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.
> -  @retval EFI_OUT_OF_RESOURCES     The receive completion token could not
> be queued
> -                                   due to a lack of system resources.
> -  @retval EFI_DEVICE_ERROR         An unexpected system or network error
> occurred.
> -                                   The EFI TCPv4 Protocol instance has been reset
> -                                   to startup defaults.
> -  @retval EFI_ACCESS_DENIED        One or more of the following conditions is
> TRUE:
> -                                   * A receive completion token with the same
> -                                     Token->CompletionToken.Event was already in
> -                                     the receive queue.
> -                                   * The current instance is in Tcp4StateClosed state.
> -                                   * The current instance is a passive one and it
> -                                     is in Tcp4StateListen state.
> -                                   * User has called Close() to disconnect this
> -                                     connection.
> -  @retval EFI_CONNECTION_FIN       The communication peer has closed the
> connection
> -                                   and there is no any buffered data in the receive
> -                                   buffer of this instance.
> -  @retval EFI_NOT_READY            The receive request could not be queued
> because
> -                                   the receive queue is full.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Receive (
> -  IN EFI_TCP4_PROTOCOL           *This,
> -  IN EFI_TCP4_IO_TOKEN           *Token
> -  );
> -
> -/**
> -  Disconnecting a TCP connection gracefully or reset a TCP connection.
> -
> -  Initiate an asynchronous close token to TCP driver. After Close() is called,
> -  any buffered transmission data will be sent by TCP driver and the current
> -  instance will have a graceful close working flow described as RFC 793 if
> -  AbortOnClose is set to FALSE, otherwise, a rest packet will be sent by TCP
> -  driver to fast disconnect this connection. When the close operation completes
> -  successfully the TCP instance is in Tcp4StateClosed state, all pending
> -  asynchronous operation is signaled and any buffers used for TCP network
> traffic
> -  is flushed.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  CloseToken               Pointer to the close token to return when
> -                                   operation finishes.
> -
> -  @retval EFI_SUCCESS              The operation completed successfully.
> -  @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance hasn't
> been
> -                                   configured.
> -  @retval EFI_ACCESS_DENIED        One or more of the following are TRUE:
> -                                   * Configure() has been called with TcpConfigData
> -                                     set to NULL and this function has not returned.
> -                                   * Previous Close() call on this instance has not
> -                                     finished.
> -  @retval EFI_INVALID_PARAMETER    One ore more parameters are invalid.
> -  @retval EFI_OUT_OF_RESOURCES     Could not allocate enough resource to
> finish the
> -                                   operation.
> -  @retval EFI_DEVICE_ERROR         Any unexpected and not belonged to above
> -                                   category error.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Close (
> -  IN EFI_TCP4_PROTOCOL           *This,
> -  IN EFI_TCP4_CLOSE_TOKEN        *CloseToken
> -  );
> -
> -/**
> -  Abort an asynchronous connection, listen, transmission or receive request.
> -
> -  The Cancel() function aborts a pending connection, listen, transmit or receive
> -  request. If Token is not NULL and the token is in the connection, listen,
> -  transmission or receive queue when it is being cancelled, its Token->Status
> -  will be set to EFI_ABORTED and then Token->Event will be signaled. If the
> token
> -  is not in one of the queues, which usually means that the asynchronous
> operation
> -  has completed, EFI_NOT_FOUND is returned. If Token is NULL all
> asynchronous token
> -  issued by Connect(), Accept(), Transmit() and Receive()will be aborted.
> -  NOTE: It has not been implemented currently.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -  @param  Token                    Pointer to a token that has been issued by
> -                                   Connect(), Accept(), Transmit() or Receive(). If
> -                                   NULL, all pending tokens issued by above four
> -                                   functions will be aborted.
> -
> -  @retval  EFI_SUCCESS             The asynchronous I/O request is aborted and
> Token->Event
> -                                   is signaled.
> -  @retval  EFI_INVALID_PARAMETER   This is NULL.
> -  @retval  EFI_NOT_STARTED         This instance hasn's been configured.
> -  @retval  EFI_NO_MAPPING          When using the default address,
> configuration
> -                                   (DHCP, BOOTP,RARP, etc.) hasn's finished yet.
> -  @retval  EFI_NOT_FOUND           The asynchronous I/O request isn's found in
> the
> -                                   transmission or receive queue. It has either
> -                                   completed or wasn's issued by Transmit() and Receive().
> -  @retval  EFI_UNSUPPORTED         The operation is not supported in current
> -                                   implementation.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Cancel (
> -  IN EFI_TCP4_PROTOCOL           *This,
> -  IN EFI_TCP4_COMPLETION_TOKEN   *Token    OPTIONAL
> -  );
> -
> -/**
> -  Poll to receive incoming data and transmit outgoing segments.
> -
> -  The Poll() function increases the rate that data is moved between the network
> -  and application and can be called when the TCP instance is created
> successfully.
> -  Its use is optional. In some implementations, the periodical timer in the MNP
> -  driver may not poll the underlying communications device fast enough to
> avoid
> -  drop packets. Drivers and applications that are experiencing packet loss should
> -  try calling the Poll() function in a high frequency.
> -
> -  @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.
> -
> -  @retval EFI_SUCCESS              Incoming or outgoing data was processed.
> -  @retval EFI_INVALID_PARAMETER    This is NULL.
> -  @retval EFI_DEVICE_ERROR         An unexpected system or network error
> occurred.
> -  @retval EFI_NOT_READY            No incoming or outgoing data was processed.
> -  @retval EFI_TIMEOUT              Data was dropped out of the transmission or
> -                                   receive queue. Consider increasing the polling
> -                                   rate.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -Tcp4Poll (
> -  IN EFI_TCP4_PROTOCOL        *This
> -  );
> -
> -#endif
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h
> deleted file mode 100644
> index f9782cb59801..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h
> +++ /dev/null
> @@ -1,130 +0,0 @@
> -/** @file
> -  Tcp option's routine header file.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#ifndef _TCP4_OPTION_H_
> -#define _TCP4_OPTION_H_
> -
> -///
> -/// The structure to store the parse option value.
> -/// ParseOption only parse the options, don't process them.
> -///
> -typedef struct _TCP_OPTION {
> -  UINT8   Flag;     ///< Flag such as TCP_OPTION_RCVD_MSS
> -  UINT8   WndScale; ///< The WndScale received
> -  UINT16  Mss;      ///< The Mss received
> -  UINT32  TSVal;    ///< The TSVal field in a timestamp option
> -  UINT32  TSEcr;    ///< The TSEcr field in a timestamp option
> -} TCP_OPTION;
> -
> -//
> -// supported TCP option type and their length
> -//
> -#define TCP_OPTION_EOP             0  ///< End Of oPtion
> -#define TCP_OPTION_NOP             1  ///< No-Option.
> -#define TCP_OPTION_MSS             2  ///< Maximum Segment Size
> -#define TCP_OPTION_WS              3  ///< Window scale
> -#define TCP_OPTION_TS              8  ///< Timestamp
> -#define TCP_OPTION_MSS_LEN         4  ///< Length of MSS option
> -#define TCP_OPTION_WS_LEN          3  ///< Length of window scale option
> -#define TCP_OPTION_TS_LEN          10 ///< Length of timestamp option
> -#define TCP_OPTION_WS_ALIGNED_LEN  4  ///< Length of window scale
> option, aligned
> -#define TCP_OPTION_TS_ALIGNED_LEN  12 ///< Length of timestamp option,
> aligned
> -
> -//
> -// recommend format of timestamp window scale
> -// option for fast process.
> -//
> -#define TCP_OPTION_TS_FAST ((TCP_OPTION_NOP << 24) | \
> -                            (TCP_OPTION_NOP << 16) | \
> -                            (TCP_OPTION_TS << 8)   | \
> -                            (TCP_OPTION_TS_LEN))
> -
> -#define TCP_OPTION_WS_FAST   ((TCP_OPTION_NOP << 24) | \
> -                              (TCP_OPTION_WS << 16)  | \
> -                              (TCP_OPTION_WS_LEN << 8))
> -
> -#define TCP_OPTION_MSS_FAST  ((TCP_OPTION_MSS << 24) |
> (TCP_OPTION_MSS_LEN << 16))
> -
> -//
> -// Other misc definations
> -//
> -#define TCP_OPTION_RCVD_MSS        0x01
> -#define TCP_OPTION_RCVD_WS         0x02
> -#define TCP_OPTION_RCVD_TS         0x04
> -#define TCP_OPTION_MAX_WS          14      ///< Maxium window scale value
> -#define TCP_OPTION_MAX_WIN         0xffff  ///< Max window size in TCP
> header
> -
> -
> -/**
> -  Compute the window scale value according to the given buffer size.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -
> -  @return  The scale value.
> -
> -**/
> -UINT8
> -TcpComputeScale (
> -  IN TCP_CB *Tcb
> -  );
> -
> -/**
> -  Build the TCP option in three-way handshake.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf    Pointer to the buffer to store the options.
> -
> -  @return  The total length of the TCP option field.
> -
> -**/
> -UINT16
> -TcpSynBuildOption (
> -  IN TCP_CB  *Tcb,
> -  IN NET_BUF *Nbuf
> -  );
> -
> -/**
> -  Build the TCP option in synchronized states.
> -
> -  @param  Tcb     Pointer to the TCP_CB of this TCP instance.
> -  @param  Nbuf    Pointer to the buffer to store the options.
> -
> -  @return  The total length of the TCP option field.
> -
> -**/
> -UINT16
> -TcpBuildOption (
> -  IN TCP_CB  *Tcb,
> -  IN NET_BUF *Nbuf
> -  );
> -
> -/**
> -  Parse the supported options.
> -
> -  @param  Tcp     Pointer to the TCP_CB of this TCP instance.
> -  @param  Option  Pointer to the TCP_OPTION used to store the successfully
> pasrsed
> -                  options.
> -
> -  @retval 0       The options are successfully pasrsed.
> -  @retval -1      Ilegal option was found.
> -
> -**/
> -INTN
> -TcpParseOption (
> -  IN     TCP_HEAD   *Tcp,
> -  IN OUT TCP_OPTION *Option
> -  );
> -
> -
> -#endif
> diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h
> b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h
> deleted file mode 100644
> index 37191fe65112..000000000000
> --- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h
> +++ /dev/null
> @@ -1,357 +0,0 @@
> -/** @file
> -  Tcp Protocol header file.
> -
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> -This program and the accompanying materials
> -are licensed and made available under the terms and conditions of the BSD
> License
> -which accompanies this distribution.  The full text of the license may be found
> at
> -http://opensource.org/licenses/bsd-license.php<BR>
> -
> -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
> -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS
> OR IMPLIED.
> -
> -**/
> -
> -#ifndef _TCP4_PROTO_H_
> -#define _TCP4_PROTO_H_
> -
> -typedef struct _TCP_CB  TCP_CB;
> -
> -#include "Tcp4Driver.h"
> -#include "Socket.h"
> -#include "Tcp4Option.h"
> -
> -
> -
> -///
> -/// Tcp states, Don't change their order, it is used as
> -/// index to mTcpOutFlag and other macros
> -///
> -#define TCP_CLOSED       0
> -#define TCP_LISTEN       1
> -#define TCP_SYN_SENT     2
> -#define TCP_SYN_RCVD     3
> -#define TCP_ESTABLISHED  4
> -#define TCP_FIN_WAIT_1   5
> -#define TCP_FIN_WAIT_2   6
> -#define TCP_CLOSING      7
> -#define TCP_TIME_WAIT    8
> -#define TCP_CLOSE_WAIT   9
> -#define TCP_LAST_ACK     10
> -
> -
> -///
> -/// Flags in the TCP header
> -///
> -#define TCP_FLG_FIN      0x01
> -#define TCP_FLG_SYN      0x02
> -#define TCP_FLG_RST      0x04
> -#define TCP_FLG_PSH      0x08
> -#define TCP_FLG_ACK      0x10
> -#define TCP_FLG_URG      0x20
> -
> - //
> - // mask for all the flags
> - //
> -#define TCP_FLG_FLAG     0x3F
> -
> -
> -#define TCP_CONNECT_REFUSED      (-1) ///< TCP error status
> -#define TCP_CONNECT_RESET        (-2) ///< TCP error status
> -#define TCP_CONNECT_CLOSED       (-3) ///< TCP error status
> -
> -//
> -// Current congestion status as suggested by RFC3782.
> -//
> -#define TCP_CONGEST_RECOVER      1  ///< During the NewReno fast recovery
> -#define TCP_CONGEST_LOSS         2  ///< Retxmit because of retxmit time out
> -#define TCP_CONGEST_OPEN         3  ///< TCP is opening its congestion window
> -
> -//
> -// TCP control flags
> -//
> -#define TCP_CTRL_NO_NAGLE        0x0001 ///< Disable Nagle algorithm
> -#define TCP_CTRL_NO_KEEPALIVE    0x0002 ///< Disable keepalive timer
> -#define TCP_CTRL_NO_WS           0x0004 ///< Disable window scale option
> -#define TCP_CTRL_RCVD_WS         0x0008 ///< Received a wnd scale option in
> syn
> -#define TCP_CTRL_NO_TS           0x0010 ///< Disable Timestamp option
> -#define TCP_CTRL_RCVD_TS         0x0020 ///< Received a Timestamp option in
> syn
> -#define TCP_CTRL_SND_TS          0x0040 ///< Send Timestamp option to remote
> -#define TCP_CTRL_SND_URG         0x0080 ///< In urgent send mode
> -#define TCP_CTRL_RCVD_URG        0x0100 ///< In urgent receive mode
> -#define TCP_CTRL_SND_PSH         0x0200 ///< In PUSH send mode
> -#define TCP_CTRL_FIN_SENT        0x0400 ///< FIN is sent
> -#define TCP_CTRL_FIN_ACKED       0x0800 ///< FIN is ACKed.
> -#define TCP_CTRL_TIMER_ON        0x1000 ///< At least one of the timer is on
> -#define TCP_CTRL_RTT_ON          0x2000 ///< The RTT measurement is on
> -#define TCP_CTRL_ACK_NOW         0x4000 ///< Send the ACK now, don't delay
> -
> -//
> -// Timer related values
> -//
> -#define TCP_TIMER_CONNECT        0                  ///< Connection establishment
> timer
> -#define TCP_TIMER_REXMIT         1                  ///< Retransmit timer
> -#define TCP_TIMER_PROBE          2                  ///< Window probe timer
> -#define TCP_TIMER_KEEPALIVE      3                  ///< Keepalive timer
> -#define TCP_TIMER_FINWAIT2       4                  ///< FIN_WAIT_2 timer
> -#define TCP_TIMER_2MSL           5                  ///< TIME_WAIT tiemr
> -#define TCP_TIMER_NUMBER         6                  ///< The total number of TCP
> timer.
> -#define TCP_TICK                 200                ///< Every TCP tick is 200ms
> -#define TCP_TICK_HZ              5                  ///< The frequence of TCP tick
> -#define TCP_RTT_SHIFT            3                  ///< SRTT & RTTVAR scaled by 8
> -#define TCP_RTO_MIN              TCP_TICK_HZ        ///< The minium value of RTO
> -#define TCP_RTO_MAX              (TCP_TICK_HZ * 60) ///< The maxium value of
> RTO
> -#define TCP_FOLD_RTT             4                  ///< Timeout threshod to fold RTT
> -
> -//
> -// Default values for some timers
> -//
> -#define TCP_MAX_LOSS             12                          ///< Default max times to
> retxmit
> -#define TCP_KEEPALIVE_IDLE_MIN   (TCP_TICK_HZ * 60 * 60 * 2) ///< First keep
> alive
> -#define TCP_KEEPALIVE_PERIOD     (TCP_TICK_HZ * 60)
> -#define TCP_MAX_KEEPALIVE        8
> -#define TCP_FIN_WAIT2_TIME       (2 * TCP_TICK_HZ)
> -#define TCP_TIME_WAIT_TIME       (2 * TCP_TICK_HZ)
> -#define TCP_PAWS_24DAY           (24 * 24 * 60 * 60 * TCP_TICK_HZ)
> -#define TCP_CONNECT_TIME         (75 * TCP_TICK_HZ)
> -
> -//
> -// The header space to be reserved before TCP data to accomodate :
> -// 60byte IP head + 60byte TCP head + link layer head
> -//
> -#define TCP_MAX_HEAD             192
> -
> -//
> -// Value ranges for some control option
> -//
> -#define TCP_RCV_BUF_SIZE         (2 * 1024 * 1024)
> -#define TCP_RCV_BUF_SIZE_MIN     (8 * 1024)
> -#define TCP_SND_BUF_SIZE         (2 * 1024 * 1024)
> -#define TCP_SND_BUF_SIZE_MIN     (8 * 1024)
> -#define TCP_BACKLOG              10
> -#define TCP_BACKLOG_MIN          5
> -#define TCP_MAX_LOSS_MIN         6
> -#define TCP_CONNECT_TIME_MIN     (60 * TCP_TICK_HZ)
> -#define TCP_MAX_KEEPALIVE_MIN    4
> -#define TCP_KEEPALIVE_IDLE_MAX   (TCP_TICK_HZ * 60 * 60 * 4)
> -#define TCP_KEEPALIVE_PERIOD_MIN (TCP_TICK_HZ * 30)
> -#define TCP_FIN_WAIT2_TIME_MAX   (4 * TCP_TICK_HZ)
> -#define TCP_TIME_WAIT_TIME_MAX   (60 * TCP_TICK_HZ)
> -
> -///
> -/// TCP segmentation data
> -///
> -typedef struct _TCP_SEG {
> -  TCP_SEQNO Seq;  ///< Starting sequence number
> -  TCP_SEQNO End;  ///< The sequence of the last byte + 1, include SYN/FIN.
> End-Seq = SEG.LEN
> -  TCP_SEQNO Ack;  ///< ACK field in the segment
> -  UINT8     Flag; ///< TCP header flags
> -  UINT16    Urg;  ///< Valid if URG flag is set.
> -  UINT32    Wnd;  ///< TCP window size field
> -} TCP_SEG;
> -
> -///
> -/// Network endpoint, IP+Port structure
> -///
> -typedef struct _TCP_PEER {
> -  UINT32      Ip;   ///< IP address, network byte order
> -  TCP_PORTNO  Port; ///< Port number, network byte order
> -} TCP_PEER;
> -
> -///
> -/// TCP control block, it includes various states
> -///
> -struct _TCP_CB {
> -  LIST_ENTRY        List;     ///< Back and forward link entry
> -  TCP_CB            *Parent;  ///< The parent TCP_CB structure
> -
> -  SOCKET            *Sk;      ///< The socket it controled.
> -  TCP_PEER          LocalEnd; ///< Local endpoint
> -  TCP_PEER          RemoteEnd;///< Remote endpoint
> -
> -  LIST_ENTRY        SndQue;   ///< Retxmission queue
> -  LIST_ENTRY        RcvQue;   ///< Reassemble queue
> -  UINT32            CtrlFlag; ///< Control flags, such as NO_NAGLE
> -  INT32             Error;    ///< Soft error status, such as TCP_CONNECT_RESET
> -
> -  //
> -  // RFC793 and RFC1122 defined variables
> -  //
> -  UINT8             State;      ///< TCP state, such as SYN_SENT, LISTEN
> -  UINT8             DelayedAck; ///< Number of delayed ACKs
> -  UINT16            HeadSum;    ///< Checksum of the fixed parts of pesudo
> -                                ///< header: Src IP, Dst IP, 0, Protocol,
> -                                ///< not include the TCP length.
> -
> -  TCP_SEQNO         Iss;        ///< Initial Sending Sequence
> -  TCP_SEQNO         SndUna;     ///< First unacknowledged data
> -  TCP_SEQNO         SndNxt;     ///< Next data sequence to send.
> -  TCP_SEQNO         SndPsh;     ///< Send PUSH point
> -  TCP_SEQNO         SndUp;      ///< Send urgent point
> -  UINT32            SndWnd;     ///< Window advertised by the remote peer
> -  UINT32            SndWndMax;  ///< Max send window advertised by the peer
> -  TCP_SEQNO         SndWl1;     ///< Seq number used for last window update
> -  TCP_SEQNO         SndWl2;     ///< Ack no of last window update
> -  UINT16            SndMss;     ///< Max send segment size
> -  TCP_SEQNO         RcvNxt;     ///< Next sequence no to receive
> -  UINT32            RcvWnd;     ///< Window advertised by the local peer
> -  TCP_SEQNO         RcvWl2;     ///< The RcvNxt (or ACK) of last window update.
> -                                ///< It is necessary because of delayed ACK
> -
> -  TCP_SEQNO         RcvUp;                   ///< Urgent point;
> -  TCP_SEQNO         Irs;                     ///< Initial Receiving Sequence
> -  UINT16            RcvMss;                  ///< Max receive segment size
> -  UINT16            EnabledTimer;            ///< Which timer is currently enabled
> -  UINT32            Timer[TCP_TIMER_NUMBER]; ///< When the timer will expire
> -  INT32             NextExpire;  ///< Count down offset for the nearest timer
> -  UINT32            Idle;        ///< How long the connection is in idle
> -  UINT32            ProbeTime;   ///< The time out value for current window prober
> -  BOOLEAN           ProbeTimerOn;///< If TRUE, the probe time is on.
> -
> -  //
> -  // RFC1323 defined variables, about window scale,
> -  // timestamp and PAWS
> -  //
> -  UINT8             SndWndScale;  ///< Wndscale received from the peer
> -  UINT8             RcvWndScale;  ///< Wndscale used to scale local buffer
> -  UINT32            TsRecent;     ///< TsRecent to echo to the remote peer
> -  UINT32            TsRecentAge;  ///< When this TsRecent is updated
> -
> -  //
> -  // RFC2988 defined variables. about RTT measurement
> -  //
> -  TCP_SEQNO         RttSeq;     ///< The seq of measured segment now
> -  UINT32            RttMeasure; ///< Currently measured RTT in heart beats
> -  UINT32            SRtt;       ///< Smoothed RTT, scaled by 8
> -  UINT32            RttVar;     ///< RTT variance, scaled by 8
> -  UINT32            Rto;        ///< Current RTO, not scaled
> -
> -  //
> -  // RFC2581, and 3782 variables.
> -  // Congestion control + NewReno fast recovery.
> -  //
> -  UINT32            CWnd;         ///< Sender's congestion window
> -  UINT32            Ssthresh;     ///< Slow start threshold.
> -  TCP_SEQNO         Recover;      ///< Recover point for NewReno
> -  UINT16            DupAck;       ///< Number of duplicate ACKs
> -  UINT8             CongestState; ///< The current congestion state(RFC3782)
> -  UINT8             LossTimes;    ///< Number of retxmit timeouts in a row
> -  TCP_SEQNO         LossRecover;  ///< Recover point for retxmit
> -
> -  //
> -  // configuration parameters, for EFI_TCP4_PROTOCOL specification
> -  //
> -  UINT32            KeepAliveIdle;   ///< Idle time before sending first probe
> -  UINT32            KeepAlivePeriod; ///< Interval for subsequent keep alive probe
> -  UINT8             MaxKeepAlive;    ///< Maxium keep alive probe times.
> -  UINT8             KeepAliveProbes; ///< The number of keep alive probe.
> -  UINT16            MaxRexmit;       ///< The maxium number of retxmit before
> abort
> -  UINT32            FinWait2Timeout; ///< The FIN_WAIT_2 time out
> -  UINT32            TimeWaitTimeout; ///< The TIME_WAIT time out
> -  UINT32            ConnectTimeout;  ///< The connect establishment time out
> -
> -  //
> -  // RFC7323
> -  // Addressing Window Retraction for TCP Window Scale Option.
> -  //
> -  TCP_SEQNO         RetxmitSeqMax;       ///< Max Seq number in previous
> retransmission.
> -
> -  //
> -  // configuration for tcp provided by user
> -  //
> -  BOOLEAN           UseDefaultAddr;
> -  UINT8             Tos;
> -  UINT8             Ttl;
> -  EFI_IPv4_ADDRESS  SubnetMask;
> -
> -  IP_IO_IP_INFO     *IpInfo;        ///<pointer reference to Ip used to send pkt
> -};
> -
> -extern LIST_ENTRY     mTcpRunQue;
> -extern LIST_ENTRY     mTcpListenQue;
> -extern TCP_SEQNO      mTcpGlobalIss;
> -extern UINT32         mTcpTick;
> -
> -///
> -/// TCP_CONNECTED: both ends have synchronized their ISN.
> -///
> -#define TCP_CONNECTED(state)  ((state) > TCP_SYN_RCVD)
> -
> -#define TCP_FIN_RCVD(State) \
> -    (((State) == TCP_CLOSE_WAIT) || \
> -    ((State) == TCP_LAST_ACK) || \
> -    ((State) == TCP_CLOSING) || \
> -    ((State) == TCP_TIME_WAIT))
> -
> -#define TCP_LOCAL_CLOSED(State) \
> -      (((State) == TCP_FIN_WAIT_1) || \
> -      ((State) == TCP_FIN_WAIT_2) || \
> -      ((State) == TCP_CLOSING) || \
> -      ((State) == TCP_TIME_WAIT) || \
> -      ((State) == TCP_LAST_ACK))
> -
> -//
> -// Get the TCP_SEG point from a net buffer's ProtoData
> -//
> -#define TCPSEG_NETBUF(NBuf) ((TCP_SEG *) ((NBuf)->ProtoData))
> -
> -//
> -// macros to compare sequence no
> -//
> -#define TCP_SEQ_LT(SeqA, SeqB)  ((INT32) ((SeqA) - (SeqB)) < 0)
> -#define TCP_SEQ_LEQ(SeqA, SeqB) ((INT32) ((SeqA) - (SeqB)) <= 0)
> -#define TCP_SEQ_GT(SeqA, SeqB)  ((INT32) ((SeqB) - (SeqA)) < 0)
> -#define TCP_SEQ_GEQ(SeqA, SeqB) ((INT32) ((SeqB) - (SeqA)) <= 0)
> -
> -//
> -// TCP_SEQ_BETWEEN return whether b <= m <= e
> -//
> -#define TCP_SEQ_BETWEEN(b, m, e)  ((e) - (b) >= (m) - (b))
> -
> -//
> -// TCP_SUB_SEQ returns Seq1 - Seq2. Make sure Seq1 >= Seq2
> -//
> -#define TCP_SUB_SEQ(Seq1, Seq2)     ((UINT32) ((Seq1) - (Seq2)))
> -
> -//
> -// Check whether Flag is on
> -//
> -#define TCP_FLG_ON(Value, Flag)     ((BOOLEAN) (((Value) & (Flag)) != 0))
> -
> -//
> -// Set and Clear operation on a Flag
> -//
> -#define TCP_SET_FLG(Value, Flag)    ((Value) |= (Flag))
> -#define TCP_CLEAR_FLG(Value, Flag)  ((Value) &= ~(Flag))
> -
> -//
> -// Test whether two peers are equal
> -//
> -#define TCP_PEER_EQUAL(Pa, Pb) \
> -  (((Pa)->Ip == (Pb)->Ip) && ((Pa)->Port == (Pb)->Port))
> -
> -//
> -// Test whether Pa matches Pb, or Pa is more specific
> -// than pb. Zero means wildcard.
> -//
> -#define TCP_PEER_MATCH(Pa, Pb) \
> -    ((((Pb)->Ip == 0) || ((Pb)->Ip == (Pa)->Ip)) && \
> -    (((Pb)->Port == 0) || ((Pb)->Port == (Pa)->Port)))
> -
> -#define TCP_TIMER_ON(Flag, Timer)     ((Flag) & (1 << (Timer)))
> -#define TCP_SET_TIMER(Flag, Timer)    ((Flag) = (UINT16) ((Flag) | (1 << (Timer))))
> -#define TCP_CLEAR_TIMER(Flag, Timer)  ((Flag) = (UINT16) ((Flag) & (~(1 <<
> (Timer)))))
> -
> -#define TCP_TIME_LT(Ta, Tb)           ((INT32) ((Ta) - (Tb)) < 0)
> -#define TCP_TIME_LEQ(Ta, Tb)          ((INT32) ((Ta) - (Tb)) <= 0)
> -#define TCP_SUB_TIME(Ta, Tb)          ((UINT32) ((Ta) - (Tb)))
> -
> -#define TCP_MAX_WIN                   0xFFFFU
> -
> -typedef
> -VOID
> -(*TCP_TIMER_HANDLER) (
> -  IN OUT TCP_CB *Tcb
> -  );
> -
> -#endif
> --
> 2.19.1.windows.1



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