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fixed bug #35756 header length calculation problem in ppp/vj.c - removed unused/invalid defines TCPH_OFFSET(_SET).

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goldsimon 2012-03-27 20:42:46 +02:00
parent a558c01589
commit e5d54f5344
3 changed files with 8 additions and 7 deletions
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3
CHANGELOG
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@ -80,6 +80,9 @@ HISTORY
++ Bugfixes:
2012-03-27: Simon Goldschmidt
* vj.c: fixed bug #35756 header length calculation problem in ppp/vj.c
2012-03-27: Simon Goldschmidt (patch by Mason)
* tcp_out.c: fixed bug #35945: SYN packet should provide the recv MSS not the
send MSS

2
src/include/lwip/tcp_impl.h
View File

@ -173,11 +173,9 @@ PACK_STRUCT_END
# include "arch/epstruct.h"
#endif
#define TCPH_OFFSET(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 8)
#define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)
#define TCPH_FLAGS(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS)
#define TCPH_OFFSET_SET(phdr, offset) (phdr)->_hdrlen_rsvd_flags = htons(((offset) << 8) | TCPH_FLAGS(phdr))
#define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr))
#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & PP_HTONS((u16_t)(~(u16_t)(TCP_FLAGS)))) | htons(flags))
#define TCPH_HDRLEN_FLAGS_SET(phdr, len, flags) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | (flags))

10
src/netif/ppp/vj.c
View File

@ -213,7 +213,7 @@ vj_compress_tcp(struct vjcompress *comp, struct pbuf *pb)
*/
INCR(vjs_misses);
comp->last_cs = lcs;
hlen += TCPH_OFFSET(th);
hlen += TCPH_HDRLEN(th);
hlen <<= 2;
/* Check that the IP/TCP headers are contained in the first buffer. */
if (hlen > pb->len) {
@ -236,7 +236,7 @@ vj_compress_tcp(struct vjcompress *comp, struct pbuf *pb)
oth = (struct tcp_hdr *)&((long *)&cs->cs_ip)[hlen];
deltaS = hlen;
hlen += TCPH_OFFSET(th);
hlen += TCPH_HDRLEN(th);
hlen <<= 2;
/* Check that the IP/TCP headers are contained in the first buffer. */
if (hlen > pb->len) {
@ -258,9 +258,9 @@ vj_compress_tcp(struct vjcompress *comp, struct pbuf *pb)
if (((u_short *)ip)[0] != ((u_short *)&cs->cs_ip)[0]
|| ((u_short *)ip)[3] != ((u_short *)&cs->cs_ip)[3]
|| ((u_short *)ip)[4] != ((u_short *)&cs->cs_ip)[4]
|| TCPH_OFFSET(th) != TCPH_OFFSET(oth)
|| TCPH_HDRLEN(th) != TCPH_HDRLEN(oth)
|| (deltaS > 5 && BCMP(ip + 1, &cs->cs_ip + 1, (deltaS - 5) << 2))
|| (TCPH_OFFSET(th) > 5 && BCMP(th + 1, oth + 1, (TCPH_OFFSET(th) - 5) << 2))) {
|| (TCPH_HDRLEN(th) > 5 && BCMP(th + 1, oth + 1, (TCPH_HDRLEN(th) - 5) << 2))) {
goto uncompressed;
}
@ -434,7 +434,7 @@ vj_uncompress_uncomp(struct pbuf *nb, struct vjcompress *comp)
hlen = IPH_HL(ip) << 2;
if (IPH_PROTO(ip) >= MAX_SLOTS
|| hlen + sizeof(struct tcp_hdr) > nb->len
|| (hlen += TCPH_OFFSET(((struct tcp_hdr *)&((char *)ip)[hlen])) << 2)
|| (hlen += TCPH_HDRLEN(((struct tcp_hdr *)&((char *)ip)[hlen])) << 2)
> nb->len
|| hlen > MAX_HDR) {
PPPDEBUG(LOG_INFO, ("vj_uncompress_uncomp: bad cid=%d, hlen=%d buflen=%d\n",