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Fix BUG#27445: grow cwnd with every duplicate ACK

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This commit is contained in:
kieranm 2009-10-28 15:13:51 +00:00
parent af3b796488
commit 71ddff4964
2 changed files with 37 additions and 34 deletions
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3
CHANGELOG
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@ -46,6 +46,9 @@ HISTORY
++ Bugfixes:
2009-10-27: Kieran Mansley
* tcp_in.c: fix BUG#27445: grow cwnd with every duplicate ACK
2009-10-25: Simon Goldschmidt
* tcp.h: bug-fix in the TCP_EVENT_RECV macro (has to call tcp_recved if
pcb->recv is NULL to keep rcv_wnd correct)

8
src/core/tcp_in.c
View File

@ -793,10 +793,10 @@ tcp_receive(struct tcp_pcb *pcb)
pcb->acked = 0;
if (pcb->snd_wl2 + pcb->snd_wnd == right_wnd_edge){
if (pcb->unacked != NULL) {
++pcb->dupacks;
if (pcb->dupacks >= 3) {
if (!(pcb->flags & TF_INFR)) {
if (!(pcb->flags & TF_INFR) && pcb->unacked != NULL) {
/* This is fast retransmit. Retransmit the first unacked segment. */
LWIP_DEBUGF(TCP_FR_DEBUG, ("tcp_receive: dupacks %"U16_F" (%"U32_F"), fast retransmit %"U32_F"\n",
(u16_t)pcb->dupacks, pcb->lastack,
@ -828,9 +828,9 @@ tcp_receive(struct tcp_pcb *pcb)
}
}
}
} else {
if (pcb->unacked == NULL && pcb->unsent == NULL)
pcb->dupacks = 0;
}
} else {
LWIP_DEBUGF(TCP_FR_DEBUG, ("tcp_receive: dupack averted %"U32_F" %"U32_F"\n",
pcb->snd_wl2 + pcb->snd_wnd, right_wnd_edge));