From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 02/12] netfilter: xt_socket: use IP early demux
Date: Wed, 5 Jun 2013 22:40:23 +0200 [thread overview]
Message-ID: <1370464832-4216-3-git-send-email-pablo@netfilter.org> (raw)
In-Reply-To: <1370464832-4216-1-git-send-email-pablo@netfilter.org>
From: Eric Dumazet <edumazet@google.com>
With IP early demux added in linux-3.6, we perform TCP lookup in IP
layer before iptables hooks.
We can avoid doing a second lookup in xt_socket.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/xt_socket.c | 26 ++++++++++++++++----------
1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/net/netfilter/xt_socket.c b/net/netfilter/xt_socket.c
index 63b2bdb..0270424 100644
--- a/net/netfilter/xt_socket.c
+++ b/net/netfilter/xt_socket.c
@@ -107,7 +107,7 @@ socket_match(const struct sk_buff *skb, struct xt_action_param *par,
{
const struct iphdr *iph = ip_hdr(skb);
struct udphdr _hdr, *hp = NULL;
- struct sock *sk;
+ struct sock *sk = skb->sk;
__be32 uninitialized_var(daddr), uninitialized_var(saddr);
__be16 uninitialized_var(dport), uninitialized_var(sport);
u8 uninitialized_var(protocol);
@@ -155,9 +155,11 @@ socket_match(const struct sk_buff *skb, struct xt_action_param *par,
}
#endif
- sk = nf_tproxy_get_sock_v4(dev_net(skb->dev), protocol,
- saddr, daddr, sport, dport, par->in, NFT_LOOKUP_ANY);
- if (sk != NULL) {
+ if (!sk)
+ sk = nf_tproxy_get_sock_v4(dev_net(skb->dev), protocol,
+ saddr, daddr, sport, dport,
+ par->in, NFT_LOOKUP_ANY);
+ if (sk) {
bool wildcard;
bool transparent = true;
@@ -173,7 +175,8 @@ socket_match(const struct sk_buff *skb, struct xt_action_param *par,
(sk->sk_state == TCP_TIME_WAIT &&
inet_twsk(sk)->tw_transparent));
- xt_socket_put_sk(sk);
+ if (sk != skb->sk)
+ xt_socket_put_sk(sk);
if (wildcard || !transparent)
sk = NULL;
@@ -260,7 +263,7 @@ socket_mt6_v1(const struct sk_buff *skb, struct xt_action_param *par)
{
struct ipv6hdr *iph = ipv6_hdr(skb);
struct udphdr _hdr, *hp = NULL;
- struct sock *sk;
+ struct sock *sk = skb->sk;
struct in6_addr *daddr = NULL, *saddr = NULL;
__be16 uninitialized_var(dport), uninitialized_var(sport);
int thoff = 0, uninitialized_var(tproto);
@@ -291,9 +294,11 @@ socket_mt6_v1(const struct sk_buff *skb, struct xt_action_param *par)
return false;
}
- sk = nf_tproxy_get_sock_v6(dev_net(skb->dev), tproto,
- saddr, daddr, sport, dport, par->in, NFT_LOOKUP_ANY);
- if (sk != NULL) {
+ if (!sk)
+ sk = nf_tproxy_get_sock_v6(dev_net(skb->dev), tproto,
+ saddr, daddr, sport, dport,
+ par->in, NFT_LOOKUP_ANY);
+ if (sk) {
bool wildcard;
bool transparent = true;
@@ -309,7 +314,8 @@ socket_mt6_v1(const struct sk_buff *skb, struct xt_action_param *par)
(sk->sk_state == TCP_TIME_WAIT &&
inet_twsk(sk)->tw_transparent));
- xt_socket_put_sk(sk);
+ if (sk != skb->sk)
+ xt_socket_put_sk(sk);
if (wildcard || !transparent)
sk = NULL;
--
1.7.10.4
next prev parent reply other threads:[~2013-06-05 20:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-05 20:40 [PATCH 00/12] Netfilter/IPVS updates for net-next Pablo Neira Ayuso
2013-06-05 20:40 ` [PATCH 01/12] netfilter: xt_CT: optimize XT_CT_NOTRACK Pablo Neira Ayuso
2013-06-05 20:40 ` Pablo Neira Ayuso [this message]
2013-06-05 20:40 ` [PATCH 03/12] bridge: netfilter: using strlcpy() instead of strncpy() Pablo Neira Ayuso
2013-06-05 20:40 ` [PATCH 04/12] netfilter: don't panic on error while walking through the init path Pablo Neira Ayuso
2013-06-05 20:40 ` [PATCH 05/12] netfilter: {ipt,ebt}_ULOG: rise warning on deprecation Pablo Neira Ayuso
2013-06-05 20:40 ` [PATCH 06/12] sched: add cond_resched_rcu() helper Pablo Neira Ayuso
2013-06-12 15:50 ` Paul E. McKenney
2013-06-05 20:40 ` [PATCH 07/12] ipvs: use cond_resched_rcu() helper when walking connections Pablo Neira Ayuso
2013-06-05 20:40 ` [PATCH 08/12] ipvs: change type of netns_ipvs->sysctl_sync_qlen_max Pablo Neira Ayuso
2013-06-05 20:40 ` [PATCH 10/12] netfilter: Implement RFC 1123 for FTP conntrack Pablo Neira Ayuso
2013-06-05 20:40 ` [PATCH 11/12] netfilter: nfnetlink_queue: cleanup copy_range usage Pablo Neira Ayuso
2013-06-05 20:40 ` [PATCH 12/12] netfilter: nfnetlink_queue: only add CAP_LEN attr when needed Pablo Neira Ayuso
2013-06-06 9:03 ` [PATCH 00/12] Netfilter/IPVS updates for net-next David Miller
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