KOVACS Krisztian | 9ad2d74 | 2008-10-08 11:35:12 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Transparent proxy support for Linux/iptables |
| 3 | * |
| 4 | * Copyright (c) 2006-2007 BalaBit IT Ltd. |
| 5 | * Author: Balazs Scheidler, Krisztian Kovacs |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | */ |
| 12 | |
KOVACS Krisztian | 9ad2d74 | 2008-10-08 11:35:12 +0200 | [diff] [blame] | 13 | #include <linux/module.h> |
| 14 | |
| 15 | #include <linux/net.h> |
| 16 | #include <linux/if.h> |
| 17 | #include <linux/netdevice.h> |
| 18 | #include <net/udp.h> |
| 19 | #include <net/netfilter/nf_tproxy_core.h> |
| 20 | |
KOVACS Krisztian | 9ad2d74 | 2008-10-08 11:35:12 +0200 | [diff] [blame] | 21 | |
| 22 | static void |
| 23 | nf_tproxy_destructor(struct sk_buff *skb) |
| 24 | { |
| 25 | struct sock *sk = skb->sk; |
| 26 | |
| 27 | skb->sk = NULL; |
| 28 | skb->destructor = NULL; |
| 29 | |
| 30 | if (sk) |
Florian Westphal | d503b30 | 2011-02-17 11:32:38 +0100 | [diff] [blame] | 31 | sock_put(sk); |
KOVACS Krisztian | 9ad2d74 | 2008-10-08 11:35:12 +0200 | [diff] [blame] | 32 | } |
| 33 | |
| 34 | /* consumes sk */ |
Florian Westphal | d503b30 | 2011-02-17 11:32:38 +0100 | [diff] [blame] | 35 | void |
KOVACS Krisztian | 9ad2d74 | 2008-10-08 11:35:12 +0200 | [diff] [blame] | 36 | nf_tproxy_assign_sock(struct sk_buff *skb, struct sock *sk) |
| 37 | { |
Florian Westphal | d503b30 | 2011-02-17 11:32:38 +0100 | [diff] [blame] | 38 | /* assigning tw sockets complicates things; most |
| 39 | * skb->sk->X checks would have to test sk->sk_state first */ |
| 40 | if (sk->sk_state == TCP_TIME_WAIT) { |
| 41 | inet_twsk_put(inet_twsk(sk)); |
| 42 | return; |
| 43 | } |
Eric Dumazet | d485d50 | 2010-09-21 21:17:29 +0000 | [diff] [blame] | 44 | |
Florian Westphal | d503b30 | 2011-02-17 11:32:38 +0100 | [diff] [blame] | 45 | skb_orphan(skb); |
| 46 | skb->sk = sk; |
| 47 | skb->destructor = nf_tproxy_destructor; |
KOVACS Krisztian | 9ad2d74 | 2008-10-08 11:35:12 +0200 | [diff] [blame] | 48 | } |
| 49 | EXPORT_SYMBOL_GPL(nf_tproxy_assign_sock); |
| 50 | |
| 51 | static int __init nf_tproxy_init(void) |
| 52 | { |
| 53 | pr_info("NF_TPROXY: Transparent proxy support initialized, version 4.1.0\n"); |
| 54 | pr_info("NF_TPROXY: Copyright (c) 2006-2007 BalaBit IT Ltd.\n"); |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | module_init(nf_tproxy_init); |
| 59 | |
| 60 | MODULE_LICENSE("GPL"); |
| 61 | MODULE_AUTHOR("Krisztian Kovacs"); |
| 62 | MODULE_DESCRIPTION("Transparent proxy support core routines"); |