From 9ad2d745a23853927a19789b034d9eb2e62d78ee Mon Sep 17 00:00:00 2001
From: KOVACS Krisztian <hidden@sch.bme.hu>
Date: Wed, 8 Oct 2008 11:35:12 +0200
Subject: netfilter: iptables tproxy core

The iptables tproxy core is a module that contains the common routines used by
various tproxy related modules (TPROXY target and socket match)

Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
 net/netfilter/nf_tproxy_core.c | 96 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 net/netfilter/nf_tproxy_core.c

(limited to 'net/netfilter/nf_tproxy_core.c')

diff --git a/net/netfilter/nf_tproxy_core.c b/net/netfilter/nf_tproxy_core.c
new file mode 100644
index 00000000000..fe34f4bf74c
--- /dev/null
+++ b/net/netfilter/nf_tproxy_core.c
@@ -0,0 +1,96 @@
+/*
+ * Transparent proxy support for Linux/iptables
+ *
+ * Copyright (c) 2006-2007 BalaBit IT Ltd.
+ * Author: Balazs Scheidler, Krisztian Kovacs
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+
+#include <linux/net.h>
+#include <linux/if.h>
+#include <linux/netdevice.h>
+#include <net/udp.h>
+#include <net/netfilter/nf_tproxy_core.h>
+
+struct sock *
+nf_tproxy_get_sock_v4(struct net *net, const u8 protocol,
+		      const __be32 saddr, const __be32 daddr,
+		      const __be16 sport, const __be16 dport,
+		      const struct net_device *in, bool listening_only)
+{
+	struct sock *sk;
+
+	/* look up socket */
+	switch (protocol) {
+	case IPPROTO_TCP:
+		if (listening_only)
+			sk = __inet_lookup_listener(net, &tcp_hashinfo,
+						    daddr, ntohs(dport),
+						    in->ifindex);
+		else
+			sk = __inet_lookup(net, &tcp_hashinfo,
+					   saddr, sport, daddr, dport,
+					   in->ifindex);
+		break;
+	case IPPROTO_UDP:
+		sk = udp4_lib_lookup(net, saddr, sport, daddr, dport,
+				     in->ifindex);
+		break;
+	default:
+		WARN_ON(1);
+		sk = NULL;
+	}
+
+	pr_debug("tproxy socket lookup: proto %u %08x:%u -> %08x:%u, listener only: %d, sock %p\n",
+		 protocol, ntohl(saddr), ntohs(sport), ntohl(daddr), ntohs(dport), listening_only, sk);
+
+	return sk;
+}
+EXPORT_SYMBOL_GPL(nf_tproxy_get_sock_v4);
+
+static void
+nf_tproxy_destructor(struct sk_buff *skb)
+{
+	struct sock *sk = skb->sk;
+
+	skb->sk = NULL;
+	skb->destructor = NULL;
+
+	if (sk)
+		nf_tproxy_put_sock(sk);
+}
+
+/* consumes sk */
+int
+nf_tproxy_assign_sock(struct sk_buff *skb, struct sock *sk)
+{
+	if (inet_sk(sk)->transparent) {
+		skb->sk = sk;
+		skb->destructor = nf_tproxy_destructor;
+		return 1;
+	} else
+		nf_tproxy_put_sock(sk);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(nf_tproxy_assign_sock);
+
+static int __init nf_tproxy_init(void)
+{
+	pr_info("NF_TPROXY: Transparent proxy support initialized, version 4.1.0\n");
+	pr_info("NF_TPROXY: Copyright (c) 2006-2007 BalaBit IT Ltd.\n");
+	return 0;
+}
+
+module_init(nf_tproxy_init);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Krisztian Kovacs");
+MODULE_DESCRIPTION("Transparent proxy support core routines");
-- 
cgit v1.2.3


From 14717f811b6662ca77bf39c07f5589c3b084f942 Mon Sep 17 00:00:00 2001
From: Huang Weiyi <weiyi.huang@gmail.com>
Date: Sun, 12 Oct 2008 21:08:34 -0700
Subject: netfilter: remove unused #include <version.h>

The file(s) below do not use LINUX_VERSION_CODE nor KERNEL_VERSION.
  net/netfilter/nf_tproxy_core.c

This patch removes the said #include <version.h>.

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/netfilter/nf_tproxy_core.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'net/netfilter/nf_tproxy_core.c')

diff --git a/net/netfilter/nf_tproxy_core.c b/net/netfilter/nf_tproxy_core.c
index fe34f4bf74c..cdc97f3105a 100644
--- a/net/netfilter/nf_tproxy_core.c
+++ b/net/netfilter/nf_tproxy_core.c
@@ -10,7 +10,6 @@
  *
  */
 
-#include <linux/version.h>
 #include <linux/module.h>
 
 #include <linux/net.h>
-- 
cgit v1.2.3