Hi, as per last mtg discussion, patch "mptcp: Write MPTCP DSS headers to outgoing data packets", includes: @@ -208,6 +303,14 @@ static struct sock *mptcp_accept(struct sock *sk, int flags, int *err, mptcp_token_update_accept(new_sock->sk, new_mptcp_sock); msk->subflow = NULL; + + mptcp_crypto_key_sha1(msk->remote_key, NULL, &ack_seq); + msk->write_seq = subflow->idsn + 1; + ack_seq++; + msk->ack_seq = ack_seq; + msk->remote_key = subflow->remote_key; + msk->ack_seq++; 'remote_key' is set a few lines above, and the 2nd ack_seq increment is wrong, we just incr it once. The 2 bottom lines are deleted by "mptcp: Implement MPTCP receive path". We should avoid inserting them at all. @Matt, can you do that with git surgery, or do you prefer a patch? Thanks, Paolo