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Duplicate FIN ACK race condition fix by Kelvin Lawson.

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likewise 2005-12-14 21:58:14 +00:00
parent 61cdbb30a6
commit 319a972e75
1 changed files with 6 additions and 1 deletions
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7
src/core/tcp_in.c
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@ -938,7 +938,12 @@ tcp_receive(struct tcp_pcb *pcb)
tcplen = TCP_TCPLEN(&inseg);
pcb->rcv_nxt += tcplen;
/* First received FIN will be ACKed +1, on any successive (duplicate)
* FINs we are already in CLOSE_WAIT and have already done +1.
*/
if (pcb->state != CLOSE_WAIT) {
pcb->rcv_nxt += tcplen;
}
/* Update the receiver's (our) window. */
if (pcb->rcv_wnd < tcplen) {