[lwip-devel] [bug #21535] Retransmit Timer in SYN_SENT state

[Oleg Tyshev]

URL:
  <http://savannah.nongnu.org/bugs/?21535>

                 Summary: Retransmit Timer in SYN_SENT state
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: olegreen
            Submitted on: Wednesday 11/07/2007 at 16:31
                Category: TCP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 

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Details:

In function tcp_process()
If we receive in SYN_SENT state SYN_ACK packet,
retransmit timer is stopped or restarted.

if(pcb->unacked == NULL)
  pcb->rtime = -1;
else
  pcb->rtime = 0;

In case restart we should reset retransmit counter.
Updated code look so:

if(pcb->unacked == NULL) {
  pcb->rtime = -1;
}
else {
  pcb->rtime = 0;
  pcb->nrtx = 0;
}





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