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| author | tuexen <tuexen@FreeBSD.org> | 2015-05-30 19:52:28 +0000 |
|---|---|---|
| committer | tuexen <tuexen@FreeBSD.org> | 2015-05-30 19:52:28 +0000 |
| commit | e99dc1c8d6513eaf87ab23f6be27a188335d57c0 (patch) | |
| tree | 2568948b8b33022ee2681da38945a28691627760 /contrib/traceroute | |
| parent | 19ecd65a1e2f3d911c6688cde2001b3a95b4539b (diff) | |
| download | FreeBSD-src-e99dc1c8d6513eaf87ab23f6be27a188335d57c0.zip FreeBSD-src-e99dc1c8d6513eaf87ab23f6be27a188335d57c0.tar.gz | |
Require the embedded packet to contain 8 bytes after the IP header instead
of only 4. This is guaranteed by RFC 792 and the verification of GRE, ICMP
and TCP packets use 8 bytes.
MFC after: 3 days
Diffstat (limited to 'contrib/traceroute')
| -rw-r--r-- | contrib/traceroute/traceroute.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/contrib/traceroute/traceroute.c b/contrib/traceroute/traceroute.c index ed2a2ae..e05a532 100644 --- a/contrib/traceroute/traceroute.c +++ b/contrib/traceroute/traceroute.c @@ -1330,7 +1330,7 @@ packet_ok(register u_char *buf, int cc, register struct sockaddr_in *from, hiplen = ((u_char *)icp + cc) - (u_char *)hip; hlen = hip->ip_hl << 2; inner = (u_char *)((u_char *)hip + hlen); - if (hlen + 12 <= cc + if (hlen + 16 <= cc && hip->ip_p == proto->num && (*proto->check)(inner, (u_char)seq)) return (type == ICMP_TIMXCEED ? -1 : code + 1); |
