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authorPablo Neira Ayuso <pablo@netfilter.org>2012-03-23 00:02:07 +0100
committerPablo Neira Ayuso <pablo@netfilter.org>2012-03-23 00:52:08 +0100
commiteeb4cb952386aac764a5cf4cf2490e50a24a8880 (patch)
tree6f22434bb52107e257493393c5da695453b893e2 /net
parent1ac0bf99260761ad0a536ddbc15f6f9b82b9bab3 (diff)
netfilter: xt_CT: fix assignation of the generic protocol tracker
`iptables -p all' uses 0 to match all protocols, while the conntrack subsystem uses 255. We still need `-p all' to attach the custom timeout policies for the generic protocol tracker. Moreover, we may use `iptables -p sctp' while the SCTP tracker is not loaded. In that case, we have to default on the generic protocol tracker. Another possibility is `iptables -p ip' that should be supported as well. This patch makes sure we validate all possible scenarios. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/xt_CT.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/net/netfilter/xt_CT.c b/net/netfilter/xt_CT.c
index 33a02b41abb4..0c8e43810ce3 100644
--- a/net/netfilter/xt_CT.c
+++ b/net/netfilter/xt_CT.c
@@ -14,6 +14,7 @@
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_CT.h>
#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
@@ -224,6 +225,7 @@ static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
if (timeout_find_get) {
const struct ipt_entry *e = par->entryinfo;
+ struct nf_conntrack_l4proto *l4proto;
if (e->ip.invflags & IPT_INV_PROTO) {
ret = -EINVAL;
@@ -245,7 +247,12 @@ static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
info->timeout, timeout->l3num);
goto err4;
}
- if (timeout->l4proto->l4proto != e->ip.proto) {
+ /* Make sure the timeout policy matches any existing
+ * protocol tracker, otherwise default to generic.
+ */
+ l4proto = __nf_ct_l4proto_find(par->family,
+ e->ip.proto);
+ if (timeout->l4proto->l4proto != l4proto->l4proto) {
ret = -EINVAL;
pr_info("Timeout policy `%s' can only be "
"used by L4 protocol number %d\n",