diff options
| author | Florian Westphal <fw@strlen.de> | 2011-04-04 17:06:21 +0200 |
|---|---|---|
| committer | Patrick McHardy <kaber@trash.net> | 2011-04-04 17:06:21 +0200 |
| commit | 96120d86fe302c006259baee9061eea9e1b9e486 (patch) | |
| tree | 2fa6e56f389431dfb84609d3d7572cad76e88e71 /net | |
| parent | b7225041e93f81e7e38fcdf27fc82044e7695efd (diff) | |
| download | lwn-96120d86fe302c006259baee9061eea9e1b9e486.tar.gz lwn-96120d86fe302c006259baee9061eea9e1b9e486.zip | |
netfilter: xt_conntrack: fix inverted conntrack direction test
--ctdir ORIGINAL matches REPLY packets, and vv:
userspace sets "invert_flags &= ~XT_CONNTRACK_DIRECTION" in ORIGINAL
case.
Thus: (CTINFO2DIR(ctinfo) == IP_CT_DIR_ORIGINAL) ^
!!(info->invert_flags & XT_CONNTRACK_DIRECTION))
yields "1 ^ 0", which is true -> returns false.
Reproducer:
iptables -I OUTPUT 1 -p tcp --syn -m conntrack --ctdir ORIGINAL
Signed-off-by: Florian Westphal <fwestphal@astaro.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/xt_conntrack.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/netfilter/xt_conntrack.c b/net/netfilter/xt_conntrack.c index 2c0086a4751e..481a86fdc409 100644 --- a/net/netfilter/xt_conntrack.c +++ b/net/netfilter/xt_conntrack.c @@ -195,7 +195,7 @@ conntrack_mt(const struct sk_buff *skb, struct xt_action_param *par, return info->match_flags & XT_CONNTRACK_STATE; if ((info->match_flags & XT_CONNTRACK_DIRECTION) && (CTINFO2DIR(ctinfo) == IP_CT_DIR_ORIGINAL) ^ - !!(info->invert_flags & XT_CONNTRACK_DIRECTION)) + !(info->invert_flags & XT_CONNTRACK_DIRECTION)) return false; if (info->match_flags & XT_CONNTRACK_ORIGSRC) |