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fixed bug #43840 Checksum error for TCP_CHECKSUM_ON_COPY==1 for no-copy data with odd length

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goldsimon 2014-12-17 09:26:17 +01:00
parent 7ca4fd817e
commit db4844e3f0
2 changed files with 15 additions and 1 deletions
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4
CHANGELOG
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@ -143,6 +143,10 @@ HISTORY
++ Bugfixes:
2014-12-17: Simon Goldschmidt
* tcp_out.c: fixed bug #43840 Checksum error for TCP_CHECKSUM_ON_COPY==1 for
no-copy data with odd length
2014-12-10: Simon Goldschmidt
* sockets.c, tcp.c, others: fixed bug #43797 set/getsockopt: SO_SNDTIMEO/SO_RCVTIMEO
take int as option but should take timeval (LWIP_SO_SNDRCVTIMEO_STANDARD==0 can

12
src/core/tcp_out.c
View File

@ -79,6 +79,12 @@
#ifndef TCP_CHECKSUM_ON_COPY_SANITY_CHECK
#define TCP_CHECKSUM_ON_COPY_SANITY_CHECK 0
#endif
/* Allow to override the failure of sanity check from warning to e.g. hard failure */
#if TCP_CHECKSUM_ON_COPY_SANITY_CHECK
#ifndef TCP_CHECKSUM_ON_COPY_SANITY_CHECK_FAIL
#define TCP_CHECKSUM_ON_COPY_SANITY_CHECK_FAIL(msg) LWIP_DEBUGF(TCP_DEBUG | LWIP_DBG_LEVEL_WARNING, msg)
#endif
#endif
/* Forward declarations.*/
static void tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb);
@ -566,6 +572,10 @@ tcp_write(struct tcp_pcb *pcb, const void *arg, u16_t len, u8_t apiflags)
#if TCP_CHECKSUM_ON_COPY
/* calculate the checksum of nocopy-data */
chksum = ~inet_chksum((u8_t*)arg + pos, seglen);
if (seglen & 1) {
chksum_swapped = 1;
chksum = SWAP_BYTES_IN_WORD(chksum);
}
#endif /* TCP_CHECKSUM_ON_COPY */
/* reference the non-volatile payload data */
p2->payload = (u8_t*)arg + pos;
@ -1204,7 +1214,7 @@ tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb)
seg->tcphdr->chksum = FOLD_U32T(acc);
#if TCP_CHECKSUM_ON_COPY_SANITY_CHECK
if (chksum_slow != seg->tcphdr->chksum) {
LWIP_DEBUGF(TCP_DEBUG | LWIP_DBG_LEVEL_WARNING,
TCP_CHECKSUM_ON_COPY_SANITY_CHECK_FAIL(
("tcp_output_segment: calculated checksum is %"X16_F" instead of %"X16_F"\n",
seg->tcphdr->chksum, chksum_slow));
seg->tcphdr->chksum = chksum_slow;