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2008-01-15 Kieran Mansley

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* tcp_out.c: BUG20511.  Modify persist timer to start when we are
    prevented from sending by a small send window, not just a zero
    send window.
This commit is contained in:
kieranm
2008-01-15 13:00:51 +00:00
parent 7518acf634
commit 6f00cbb6ef
2 changed files with 17 additions and 7 deletions
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18
src/core/tcp_out.c
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@@ -510,11 +510,7 @@ tcp_output(struct tcp_pcb *pcb)
ntohl(seg->tcphdr->seqno), pcb->lastack));
}
#endif /* TCP_CWND_DEBUG */
if (seg != NULL && pcb->snd_wnd == 0 && pcb->persist_backoff == 0) {
/* prepare for persist timer */
pcb->persist_cnt = 0;
pcb->persist_backoff = 1;
} /* data available and window allows it to be sent? */
/* data available and window allows it to be sent? */
while (seg != NULL &&
ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len <= wnd) {
LWIP_ASSERT("RST not expected here!",
@@ -579,8 +575,16 @@ tcp_output(struct tcp_pcb *pcb)
}
seg = pcb->unsent;
}
pcb->flags &= ~TF_NAGLEMEMERR;
return ERR_OK;
if (seg != NULL && pcb->persist_backoff == 0 &&
ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len > pcb->snd_wnd) {
/* prepare for persist timer */
pcb->persist_cnt = 0;
pcb->persist_backoff = 1;
}
pcb->flags &= ~TF_NAGLEMEMERR;
return ERR_OK;
}
/**