| commit | 49f817d793d1bcc11d721881aac037b996feef5c | [log] [tgz] |
|---|---|---|
| author | Lin Zhang <xiaolou4617@gmail.com> | Fri Oct 06 00:44:03 2017 +0800 |
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | Mon Oct 09 13:08:39 2017 +0200 |
| tree | f1525ecf75e8f4e4d7c9ffca73f2b097cb4c424a | |
| parent | e466af75c074e76107ae1cd5a2823e9c61894ffb [diff] |
netfilter: SYNPROXY: skip non-tcp packet in {ipv4, ipv6}_synproxy_hook
In function {ipv4,ipv6}_synproxy_hook we expect a normal tcp packet, but
the real server maybe reply an icmp error packet related to the exist
tcp conntrack, so we will access wrong tcp data.
Fix it by checking for the protocol field and only process tcp traffic.
Signed-off-by: Lin Zhang <xiaolou4617@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>