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BUG25629: set TCP_ACK flags on keepalive and zero window probes

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This commit is contained in:
kieranm 2009-03-26 14:25:46 +00:00
parent 7d8fac62ec
commit 84505d4cc8
2 changed files with 7 additions and 4 deletions
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3
CHANGELOG
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@ -75,6 +75,9 @@ HISTORY
++ Bugfixes:
2009-03-26 Kieran Mansley
* tcp_out.c: set TCP_ACK flag on keepalive and zero window probes
2009-02-18 Simon Goldschmidt (Jonathan Larmour and Bill Auerbach)
* ip_frag.c: patch #6528: the buffer used for IP_FRAG_USES_STATIC_BUF could be
too small depending on MEM_ALIGNMENT

8
src/core/tcp_out.c
View File

@ -830,8 +830,8 @@ tcp_keepalive(struct tcp_pcb *pcb)
tcphdr->dest = htons(pcb->remote_port);
tcphdr->seqno = htonl(pcb->snd_nxt - 1);
tcphdr->ackno = htonl(pcb->rcv_nxt);
TCPH_FLAGS_SET(tcphdr, 0);
tcphdr->wnd = htons(pcb->rcv_ann_wnd);
TCPH_FLAGS_SET(tcphdr, TCP_ACK);
tcphdr->wnd = htons(pcb->rcv_ann_wnd + 1);
tcphdr->urgp = 0;
TCPH_HDRLEN_SET(tcphdr, 5);
@ -913,8 +913,8 @@ tcp_zero_window_probe(struct tcp_pcb *pcb)
tcphdr->dest = htons(pcb->remote_port);
tcphdr->seqno = seg->tcphdr->seqno;
tcphdr->ackno = htonl(pcb->rcv_nxt);
TCPH_FLAGS_SET(tcphdr, 0);
tcphdr->wnd = htons(pcb->rcv_ann_wnd);
TCPH_FLAGS_SET(tcphdr, TCP_ACK);
tcphdr->wnd = htons(pcb->rcv_ann_wnd + 1);
tcphdr->urgp = 0;
TCPH_HDRLEN_SET(tcphdr, 5);