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fixed bug #25467: Listen backlog is not reset on timeout in SYN_RCVD: Accepts_pending is decrease on a corresponding listen pcb when a connection in state SYN_RCVD is close.

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goldsimon 2009-02-10 20:29:38 +00:00
parent 878532a30d
commit 10c3ce08af
2 changed files with 26 additions and 0 deletions
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5
CHANGELOG
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@ -60,6 +60,11 @@ HISTORY
++ Bugfixes:
2009-02-10 Simon Goldschmidt
* tcp.c: fixed bug #25467: Listen backlog is not reset on timeout in SYN_RCVD:
Accepts_pending is decrease on a corresponding listen pcb when a connection
in state SYN_RCVD is close.
2009-01-28 Jonathan Larmour
* pbuf.c: reclaim pbufs from TCP out-of-sequence segments if we run
out of pool pbufs.

21
src/core/tcp.c
View File

@ -1150,6 +1150,27 @@ tcp_pcb_purge(struct tcp_pcb *pcb)
LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge\n"));
#if TCP_LISTEN_BACKLOG
if (pcb->state == SYN_RCVD) {
/* Need to find the corresponding listen_pcb and decrease its accepts_pending */
struct tcp_pcb_listen *lpcb;
LWIP_ASSERT("tcp_pcb_purge: pcb->state == SYN_RCVD but tcp_listen_pcbs is NULL",
tcp_listen_pcbs.listen_pcbs != NULL);
for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
if ((lpcb->local_port == pcb->local_port) &&
(ip_addr_isany(&lpcb->local_ip) ||
ip_addr_cmp(&pcb->local_ip, &lpcb->local_ip))) {
/* port and address of the listen pcb match the timed-out pcb */
LWIP_ASSERT("tcp_pcb_purge: listen pcb does not have accepts pending",
lpcb->accepts_pending > 0);
lpcb->accepts_pending--;
break;
}
}
}
#endif /* TCP_LISTEN_BACKLOG */
if (pcb->refused_data != NULL) {
LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->refused_data\n"));
pbuf_free(pcb->refused_data);