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tcp_in.c: Fix bug #20126 : Zero ssthresh bug (by Per-Henrik Lundblom and Kieran Mansley).

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This commit is contained in:
fbernon 2007-06-17 16:15:34 +00:00
parent 6784fd64f3
commit e89f5983be
1 changed files with 7 additions and 1 deletions
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8
src/core/tcp_in.c
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@ -701,12 +701,18 @@ tcp_receive(struct tcp_pcb *pcb)
/*pcb->ssthresh = LWIP_MAX((pcb->snd_max -
pcb->lastack) / 2,
2 * pcb->mss);*/
/* Set ssthresh to half of the minimum of the currenct cwnd and the advertised window */
/* Set ssthresh to half of the minimum of the current cwnd and the advertised window */
if (pcb->cwnd > pcb->snd_wnd)
pcb->ssthresh = pcb->snd_wnd / 2;
else
pcb->ssthresh = pcb->cwnd / 2;
/* The minimum value for ssthresh should be 2 MSS */
if (pcb->ssthresh < 2*pcb->mss) {
LWIP_DEBUGF(TCP_FR_DEBUG, ("tcp_receive: The minimum value for ssthresh %"U16_F" should be min 2 mss %"U16_F"...\n", pcb->ssthresh, 2*pcb->mss));
pcb->ssthresh = 2*pcb->mss;
}
pcb->cwnd = pcb->ssthresh + 3 * pcb->mss;
pcb->flags |= TF_INFR;
} else {