[NETFILTER] ctnetlink: add support to change protocol info
This patch add support to change the state of the private protocol
information via conntrack_netlink.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/netfilter/ip_conntrack_netlink.c b/net/ipv4/netfilter/ip_conntrack_netlink.c
index 06ed91e..166e606 100644
--- a/net/ipv4/netfilter/ip_conntrack_netlink.c
+++ b/net/ipv4/netfilter/ip_conntrack_netlink.c
@@ -949,6 +949,31 @@
return 0;
}
+static inline int
+ctnetlink_change_protoinfo(struct ip_conntrack *ct, struct nfattr *cda[])
+{
+ struct nfattr *tb[CTA_PROTOINFO_MAX], *attr = cda[CTA_PROTOINFO-1];
+ struct ip_conntrack_protocol *proto;
+ u_int16_t npt = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum;
+ int err = 0;
+
+ if (nfattr_parse_nested(tb, CTA_PROTOINFO_MAX, attr) < 0)
+ goto nfattr_failure;
+
+ proto = ip_conntrack_proto_find_get(npt);
+ if (!proto)
+ return -EINVAL;
+
+ if (proto->from_nfattr)
+ err = proto->from_nfattr(tb, ct);
+ ip_conntrack_proto_put(proto);
+
+ return err;
+
+nfattr_failure:
+ return -ENOMEM;
+}
+
static int
ctnetlink_change_conntrack(struct ip_conntrack *ct, struct nfattr *cda[])
{
@@ -974,6 +999,12 @@
return err;
}
+ if (cda[CTA_PROTOINFO-1]) {
+ err = ctnetlink_change_protoinfo(ct, cda);
+ if (err < 0)
+ return err;
+ }
+
DEBUGP("all done\n");
return 0;
}
@@ -1003,6 +1034,12 @@
if (err < 0)
goto err;
+ if (cda[CTA_PROTOINFO-1]) {
+ err = ctnetlink_change_protoinfo(ct, cda);
+ if (err < 0)
+ return err;
+ }
+
ct->helper = ip_conntrack_helper_find_get(rtuple);
add_timer(&ct->timeout);