git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 9ad2d745 KK |
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 | ||
| 9ad2d745 KK |
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 | ||
| 9ad2d745 KK |
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) | |
| 31 | nf_tproxy_put_sock(sk); | |
| 32 | } | |
| 33 | ||
| 34 | /* consumes sk */ | |
| 35 | int | |
| 36 | nf_tproxy_assign_sock(struct sk_buff *skb, struct sock *sk) | |
| 37 | { | |
| d485d500 ED |
38 | bool transparent = (sk->sk_state == TCP_TIME_WAIT) ? |
| 39 | inet_twsk(sk)->tw_transparent : | |
| 40 | inet_sk(sk)->transparent; | |
| 41 | ||
| 42 | if (transparent) { | |
| 9a279bcb | 43 | skb_orphan(skb); |
| 9ad2d745 KK |
44 | skb->sk = sk; |
| 45 | skb->destructor = nf_tproxy_destructor; | |
| 46 | return 1; | |
| 47 | } else | |
| 48 | nf_tproxy_put_sock(sk); | |
| 49 | ||
| 50 | return 0; | |
| 51 | } | |
| 52 | EXPORT_SYMBOL_GPL(nf_tproxy_assign_sock); | |
| 53 | ||
| 54 | static int __init nf_tproxy_init(void) | |
| 55 | { | |
| 56 | pr_info("NF_TPROXY: Transparent proxy support initialized, version 4.1.0\n"); | |
| 57 | pr_info("NF_TPROXY: Copyright (c) 2006-2007 BalaBit IT Ltd.\n"); | |
| 58 | return 0; | |
| 59 | } | |
| 60 | ||
| 61 | module_init(nf_tproxy_init); | |
| 62 | ||
| 63 | MODULE_LICENSE("GPL"); | |
| 64 | MODULE_AUTHOR("Krisztian Kovacs"); | |
| 65 | MODULE_DESCRIPTION("Transparent proxy support core routines"); |