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/*
* 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/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>
static void
nf_tproxy_destructor(struct sk_buff *skb)
{
struct sock *sk = skb->sk;
skb->sk = NULL;
skb->destructor = NULL;
if (sk)
sock_put(sk);
}
/* consumes sk */
void
nf_tproxy_assign_sock(struct sk_buff *skb, struct sock *sk)
{
/* assigning tw sockets complicates things; most
* skb->sk->X checks would have to test sk->sk_state first */
if (sk->sk_state == TCP_TIME_WAIT) {
inet_twsk_put(inet_twsk(sk));
return;
}
skb_orphan(skb);
skb->sk = sk;
skb->destructor = nf_tproxy_destructor;
}
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");
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