diff options
authorPablo Neira Ayuso <pablo@netfilter.org>2011-02-01 16:06:30 +0100
committerPatrick McHardy <kaber@trash.net>2011-02-01 16:06:30 +0100
commit3db7e93d3308fb882884b9f024235d6fbf542034 (patch)
parent9d0db8b6b1da9e3d4c696ef29449700c58d589db (diff)
netfilter: ecache: always set events bits, filter them later
For the following rule: iptables -I PREROUTING -t raw -j CT --ctevents assured The event delivered looks like the following: [UPDATE] tcp 6 src= dst= sport=37041 dport=80 src= dst= sport=80 dport=37041 [ASSURED] Note that the TCP protocol state is not included. For that reason the CT event filtering is not very useful for conntrackd. To resolve this issue, instead of conditionally setting the CT events bits based on the ctmask, we always set them and perform the filtering in the late stage, just before the delivery. Thus, the event delivered looks like the following: [UPDATE] tcp 6 432000 ESTABLISHED src= dst= sport=37041 dport=80 src= dst= sport=80 dport=37041 [ASSURED] Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2 files changed, 3 insertions, 3 deletions
diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h
index 96ba5f7dcab..349cefedc9f 100644
--- a/include/net/netfilter/nf_conntrack_ecache.h
+++ b/include/net/netfilter/nf_conntrack_ecache.h
@@ -77,9 +77,6 @@ nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct)
if (e == NULL)
- if (!(e->ctmask & (1 << event)))
- return;
set_bit(event, &e->cache);
diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c
index 5702de35e2b..63a1b915a7e 100644
--- a/net/netfilter/nf_conntrack_ecache.c
+++ b/net/netfilter/nf_conntrack_ecache.c
@@ -63,6 +63,9 @@ void nf_ct_deliver_cached_events(struct nf_conn *ct)
* this does not harm and it happens very rarely. */
unsigned long missed = e->missed;
+ if (!((events | missed) & e->ctmask))
+ goto out_unlock;
ret = notify->fcn(events | missed, &item);
if (unlikely(ret < 0 || missed)) {