[lwip-devel] [bug #34111] TCP_FIN_WAIT_TIMEOUT might be too small

[tao tang]

Follow-up Comment #3, bug #34111 (project lwip):

1: The wrong *seqno* cause the peer end doesn't close connection succefully. 
2: In my opinion,  20s is enough for FIN-WAIT-2 even if the device based on
lwIP is working in wireless network. 
For these two reasons, I suggest adjusting *seqno* to a proper value.

For the state of machine is LISTEN,
tcp_in.c#tcp_listen_input
- tcp_rst(ackno + 1, seqno + tcplen, ......);
+ tcp_rst(ackno, seqno + tcplen, ......);

Hope it will be OK then! But I don't know the reason that the origin author
add 1, anyone know it please tell me!

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