svn commit: r320479 - in head/sys/netpfil/ipfw: nat64 nptv6 pmod
Andrey V. Elsukov
ae at FreeBSD.org
Thu Jun 29 19:06:45 UTC 2017
Author: ae
Date: Thu Jun 29 19:06:43 2017
New Revision: 320479
URL: https://svnweb.freebsd.org/changeset/base/320479
Log:
Fix IPv6 extension header parsing. The length field doesn't include the
first 8 octets.
Obtained from: Yandex LLC
MFC after: 3 days
Modified:
head/sys/netpfil/ipfw/nat64/nat64_translate.c
head/sys/netpfil/ipfw/nptv6/nptv6.c
head/sys/netpfil/ipfw/pmod/tcpmod.c
Modified: head/sys/netpfil/ipfw/nat64/nat64_translate.c
==============================================================================
--- head/sys/netpfil/ipfw/nat64/nat64_translate.c Thu Jun 29 18:52:36 2017 (r320478)
+++ head/sys/netpfil/ipfw/nat64/nat64_translate.c Thu Jun 29 19:06:43 2017 (r320479)
@@ -1054,7 +1054,7 @@ nat64_getlasthdr(struct mbuf *m, int *offset)
if (proto == IPPROTO_HOPOPTS && ip6->ip6_plen == 0)
return (-1);
proto = hbh->ip6h_nxt;
- hlen += hbh->ip6h_len << 3;
+ hlen += (hbh->ip6h_len + 1) << 3;
}
if (offset != NULL)
*offset = hlen;
Modified: head/sys/netpfil/ipfw/nptv6/nptv6.c
==============================================================================
--- head/sys/netpfil/ipfw/nptv6/nptv6.c Thu Jun 29 18:52:36 2017 (r320478)
+++ head/sys/netpfil/ipfw/nptv6/nptv6.c Thu Jun 29 19:06:43 2017 (r320479)
@@ -125,7 +125,7 @@ nptv6_getlasthdr(struct nptv6_cfg *cfg, struct mbuf *m
if (m->m_len < hlen)
return (-1);
proto = hbh->ip6h_nxt;
- hlen += hbh->ip6h_len << 3;
+ hlen += (hbh->ip6h_len + 1) << 3;
}
if (offset != NULL)
*offset = hlen;
Modified: head/sys/netpfil/ipfw/pmod/tcpmod.c
==============================================================================
--- head/sys/netpfil/ipfw/pmod/tcpmod.c Thu Jun 29 18:52:36 2017 (r320478)
+++ head/sys/netpfil/ipfw/pmod/tcpmod.c Thu Jun 29 19:06:43 2017 (r320479)
@@ -137,7 +137,7 @@ tcpmod_ipv6_setmss(struct mbuf **mp, uint16_t mss)
proto == IPPROTO_DSTOPTS) {
hbh = mtodo(*mp, hlen);
proto = hbh->ip6h_nxt;
- hlen += hbh->ip6h_len << 3;
+ hlen += (hbh->ip6h_len + 1) << 3;
}
tcp = mtodo(*mp, hlen);
plen = (*mp)->m_pkthdr.len - hlen;
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