[lwip-devel] [bug #35845] Cannot switch from SYN-SENT to SYN-RCVD

[Woody Wu]

URL:
  <http://savannah.nongnu.org/bugs/?35845>

                 Summary: Cannot switch from SYN-SENT  to SYN-RCVD
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: narke
            Submitted on: Thu 15 Mar 2012 03:37:01 AM GMT
                Category: TCP
                Severity: 3 - Normal
              Item Group: Feature Request
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: 1.4.0

    _______________________________________________________

Details:

I found in lwIP,  when an active open pcb in its SYN-SENT state and
received an segment sent from peer which has SYN flag but w/o ACK
flag,  the pcb just ignore the segment.  However, in RFC 793, it is
required to accept the SYN only segment in SYN-SENT state and switch to
SYN-RCVD state.

I found this by both testing and checking the source code (tcp_input.c)





    _______________________________________________________

Reply to this item at:

  <http://savannah.nongnu.org/bugs/?35845>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.nongnu.org/