IWD is running as AP with the build-in DHCP but android phones report no internet connection and switch back to WiFi home network
2:14 a.m.
Hi,
I have a stand alone device (without internet access) using iwd in Access point mode but
some android phones connected to this device show no internet connection and switch back
to WiFi home network.
With different dhcp-server (dnsmasq) this problem have been solved by droping
defaultroute in answered DHCP requests. How I can solve no internet connection with iwd
and the built-in DHCP server.
Regards,
Salahaldeen Altous
2:35 a.m.
New subject: IWD is running as AP with the build-in DHCP but android phones
report no internet connection and switch back to WiFi home network
Hi Salahaldeen,
On 11/5/21 10:14 AM, salahaldeen.altous(a)leica-camera.com wrote:
Hi,
I have a stand alone device (without internet access) using iwd in Access point mode but
some android phones connected to this device show no internet connection and switch back
to WiFi home network.
Interesting. Not sure why they would do that if the user explicitly selected to
connect to your device...
With different dhcp-server (dnsmasq) this problem have been solved
by droping defaultroute in answered DHCP requests. How I can solve no internet connection
with iwd and the built-in DHCP server.
I suppose we could use the same approach. Could you try the attached patch and
see if this helps.
Regards,
-Denis
4:47 a.m.
New subject: IWD is running as AP with the build-in DHCP but android phones
report no internet connection and switch back to WiFi home network
Hi Denis,
Hi Salahaldeen,
On 11/5/21 10:14 AM, salahaldeen.altous(a)leica-camera.com wrote:
Interesting. Not sure why they would do that if the user explicitly selected to
connect to your device...
not all Android phones are doing that. But many of them.
I suppose we could use the same approach. Could you try the attached patch and
see if this helps.
I have tested the attached patch but still not working. I have
checked again. We have dropped DHCP option 6 to report Domain Name servers
+dhcp-option=option:dns-server
+dhcp-option=option:router
How I can also drop dhcp option 6 to report Domain Name servers?
Regards,
-Denis
Regards,
Salahaldeen
5:17 a.m.
New subject: IWD is running as AP with the build-in DHCP but android phones
report no internet connection and switch back to WiFi home network
Hi Salahaldeen,
I have tested the attached patch but still not working. I have
checked again. We have dropped DHCP option 6 to report Domain Name servers
+dhcp-option=option:dns-server
+dhcp-option=option:router
How I can also drop dhcp option 6 to report Domain Name servers?
So looking at ell/dhcp-server.c, we shouldn't be sending DNS server info unless
l_dhcp_server_set_dns has been called. So this part seems OK.
In iwd, src/ap.c... We do not call l_dhcp_server_set_dns unless the profile
specifies it. So if IPv4.DNSList isn't set, we should not be sending this
option in the lease.
Can you look (or share) pcaps of iwd & dnsmasq DHCP exchanges to see / compare
what is actually happening?
Regards,
-Denis
8:32 p.m.
New subject: IWD is running as AP with the build-in DHCP but android phones
report no internet connection and switch back to WiFi home network
Hi Denis,
thanks again for your quick help.
Hi Salahaldeen,
So looking at ell/dhcp-server.c, we shouldn't be sending DNS server info unless
l_dhcp_server_set_dns has been called. So this part seems OK.
Thanks for your
confirmation.
In iwd, src/ap.c... We do not call l_dhcp_server_set_dns unless the profile
specifies it. So if IPv4.DNSList isn't set, we should not be sending this
option in the lease.
Can you look (or share) pcaps of iwd & dnsmasq DHCP exchanges to see / compare
what is actually happening?
The dnsmasq DHCP solution was running at different hardware which is using openwrt.
I will try to run iwd with dnsmasq and dropping DHCP option 3 and 6 and check if it work.
After that I can compare between both DHCP.
Regards,
-Denis
Regards,
Salahaldeen
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Denis Kenzior -
salahaldeen.altous＠leica-camera.com