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ctdb-common: Check the version field in IPv6 packets
author
Martin Schwenke
<martin@meltin.net>
Tue, 28 Aug 2018 06:10:21 +0000
(16:10 +1000)
committer
Amitay Isaacs
<amitay@samba.org>
Thu, 30 Aug 2018 02:48:59 +0000
(
04:48
+0200)
Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
ctdb/common/system_socket.c
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diff --git
a/ctdb/common/system_socket.c
b/ctdb/common/system_socket.c
index 99c83c0ed5a65b694da4a584afec06389a7745a2..9336eb50713661cec16c74162aa14e461c478db8 100644
(file)
--- a/
ctdb/common/system_socket.c
+++ b/
ctdb/common/system_socket.c
@@
-818,6
+818,11
@@
static int tcp6_extract(const uint8_t *ip_pkt,
/* IP6 */
ip6 = (const struct ip6_hdr *)ip_pkt;
+ /* IPv6 only */
+ if ((ip6->ip6_vfc >> 4) != 6){
+ return ENOMSG;
+ }
+
/* we only want TCP */
if (ip6->ip6_nxt != IPPROTO_TCP) {
return ENOMSG;