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fixed bug #34587: TCP_BUILD_MSS_OPTION doesn't consider netif->mtu, causes slow network

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This commit is contained in:
Simon Goldschmidt 2011-10-18 20:11:39 +02:00
parent 2f58ef781c
commit 1f396946e5
3 changed files with 6 additions and 5 deletions
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4
CHANGELOG
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@ -69,6 +69,10 @@ HISTORY
++ Bugfixes:
2011-10-18: Simon Goldschmidt
* tcp_impl.h, tcp_out.c: fixed bug #34587: TCP_BUILD_MSS_OPTION doesn't
consider netif->mtu, causes slow network
2011-10-18: Simon Goldschmidt
* sockets.c: fixed bug #34581 missing parentheses in udplite sockets code

2
src/core/tcp_out.c
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@ -1067,7 +1067,7 @@ tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb)
//LWIP_ASSERT("seg->tcphdr not aligned", ((mem_ptr_t)seg->tcphdr % MEM_ALIGNMENT) == 0);
opts = (u32_t *)(void *)(seg->tcphdr + 1);
if (seg->flags & TF_SEG_OPTS_MSS) {
TCP_BUILD_MSS_OPTION(*opts);
*opts = TCP_BUILD_MSS_OPTION(pcb->mss);
opts += 1;
}
#if LWIP_TCP_TIMESTAMPS

5
src/include/lwip/tcp_impl.h
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@ -303,10 +303,7 @@ struct tcp_seg {
(flags & TF_SEG_OPTS_TS ? 12 : 0)
/** This returns a TCP header option for MSS in an u32_t */
#define TCP_BUILD_MSS_OPTION(x) (x) = PP_HTONL(((u32_t)2 << 24) | \
((u32_t)4 << 16) | \
(((u32_t)TCP_MSS / 256) << 8) | \
(TCP_MSS & 255))
#define TCP_BUILD_MSS_OPTION(mss) htonl(0x02040000 | ((mss) & 0xFFFF))
/* Global variables: */
extern struct tcp_pcb *tcp_input_pcb;