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Fixed bug #27504: tcp_enqueue wrongly concatenates segments which are not consecutive when retransmitting unacked segments

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goldsimon 2009-10-11 13:06:44 +00:00
parent c0e22c255c
commit ac638c85f3
2 changed files with 7 additions and 1 deletions
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4
CHANGELOG
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@ -43,6 +43,10 @@ HISTORY
++ Bugfixes:
2009-10-11 Simon Goldschmidt (Jörg Kesten)
* tcp_out.c: Fixed bug #27504: tcp_enqueue wrongly concatenates segments
which are not consecutive when retransmitting unacked segments
2009-10-09 Simon Goldschmidt
* opt.h: Fixed default values of some stats to only be enabled if used
Fixes bug #27338: sys_stats is defined when NO_SYS = 1

4
src/core/tcp_out.c
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@ -347,7 +347,9 @@ tcp_enqueue(struct tcp_pcb *pcb, void *arg, u16_t len,
/* fit within max seg size */
(useg->len + queue->len <= pcb->mss) &&
/* only concatenate segments with the same options */
(useg->flags == queue->flags)) {
(useg->flags == queue->flags) &&
/* segments are consecutive */
(ntohl(useg->tcphdr->seqno) + useg->len == ntohl(queue->tcphdr->seqno)) ) {
/* Remove TCP header from first segment of our to-be-queued list */
if(pbuf_header(queue->p, -(TCP_HLEN + optlen))) {
/* Can we cope with this failing? Just assert for now */