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fixed bug #34426: tcp_zero_window_probe() transmits incorrect byte value when pcb->unacked != NULL

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Simon Goldschmidt 2011-10-09 20:11:33 +02:00 committed by goldsimon
parent 277c7aa518
commit 56cee6b4d8
2 changed files with 8 additions and 2 deletions
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4
CHANGELOG
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@ -49,6 +49,10 @@ HISTORY
++ Bugfixes:
2011-10-09: Simon Goldschmidt
* tcp_out.c: fixed bug #34426: tcp_zero_window_probe() transmits incorrect
byte value when pcb->unacked != NULL
2011-10-09: Simon Goldschmidt
* ip4.c: fixed bug #34447 LWIP_IP_ACCEPT_UDP_PORT(dst_port) wrong

6
src/core/tcp_out.c
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@ -1453,9 +1453,11 @@ tcp_zero_window_probe(struct tcp_pcb *pcb)
TCPH_FLAGS_SET(tcphdr, TCP_ACK | TCP_FIN);
} else {
/* Data segment, copy in one byte from the head of the unacked queue */
struct tcp_hdr *thdr = (struct tcp_hdr *)seg->p->payload;
char *d = ((char *)p->payload + TCP_HLEN);
pbuf_copy_partial(seg->p, d, 1, TCPH_HDRLEN(thdr) * 4);
/* Depending on whether the segment has already been sent (unacked) or not
(unsent), seg->p->payload points to the IP header or TCP header.
Ensure we copy the first TCP data byte: */
pbuf_copy_partial(seg->p, d, 1, seg->p->tot_len - seg->len);
}
#if CHECKSUM_GEN_TCP