projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b3f644fc PM |
1 | /* |
| 2 | * Copyright (c) 2011 Patrick McHardy <[email protected]> | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License version 2 as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * Based on Rusty Russell's IPv6 MASQUERADE target. Development of IPv6 | |
| 9 | * NAT funded by Astaro. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/kernel.h> | |
| 13 | #include <linux/module.h> | |
| 14 | #include <linux/netdevice.h> | |
| 15 | #include <linux/ipv6.h> | |
| 16 | #include <linux/netfilter.h> | |
| 17 | #include <linux/netfilter_ipv6.h> | |
| 18 | #include <linux/netfilter/x_tables.h> | |
| 19 | #include <net/netfilter/nf_nat.h> | |
| 20 | #include <net/addrconf.h> | |
| 21 | #include <net/ipv6.h> | |
| be6b635c | 22 | #include <net/netfilter/ipv6/nf_nat_masquerade.h> |
| b3f644fc PM |
23 | |
| 24 | static unsigned int | |
| 25 | masquerade_tg6(struct sk_buff *skb, const struct xt_action_param *par) | |
| 26 | { | |
| 613dbd95 | 27 | return nf_nat_masquerade_ipv6(skb, par->targinfo, xt_out(par)); |
| b3f644fc PM |
28 | } |
| 29 | ||
| 30 | static int masquerade_tg6_checkentry(const struct xt_tgchk_param *par) | |
| 31 | { | |
| 2eb0f624 | 32 | const struct nf_nat_range2 *range = par->targinfo; |
| b3f644fc PM |
33 | |
| 34 | if (range->flags & NF_NAT_RANGE_MAP_IPS) | |
| 35 | return -EINVAL; | |
| 23715275 KK |
36 | return nf_ct_netns_get(par->net, par->family); |
| 37 | } | |
| 38 | ||
| 39 | static void masquerade_tg6_destroy(const struct xt_tgdtor_param *par) | |
| 40 | { | |
| 41 | nf_ct_netns_put(par->net, par->family); | |
| b3f644fc PM |
42 | } |
| 43 | ||
| b3f644fc PM |
44 | static struct xt_target masquerade_tg6_reg __read_mostly = { |
| 45 | .name = "MASQUERADE", | |
| 46 | .family = NFPROTO_IPV6, | |
| 47 | .checkentry = masquerade_tg6_checkentry, | |
| 23715275 | 48 | .destroy = masquerade_tg6_destroy, |
| b3f644fc PM |
49 | .target = masquerade_tg6, |
| 50 | .targetsize = sizeof(struct nf_nat_range), | |
| 51 | .table = "nat", | |
| 52 | .hooks = 1 << NF_INET_POST_ROUTING, | |
| 53 | .me = THIS_MODULE, | |
| 54 | }; | |
| 55 | ||
| 56 | static int __init masquerade_tg6_init(void) | |
| 57 | { | |
| 58 | int err; | |
| 59 | ||
| 60 | err = xt_register_target(&masquerade_tg6_reg); | |
| 584eab29 TY |
61 | if (err) |
| 62 | return err; | |
| 63 | ||
| 64 | err = nf_nat_masquerade_ipv6_register_notifier(); | |
| 65 | if (err) | |
| 66 | xt_unregister_target(&masquerade_tg6_reg); | |
| b3f644fc PM |
67 | |
| 68 | return err; | |
| 69 | } | |
| 70 | static void __exit masquerade_tg6_exit(void) | |
| 71 | { | |
| be6b635c | 72 | nf_nat_masquerade_ipv6_unregister_notifier(); |
| b3f644fc PM |
73 | xt_unregister_target(&masquerade_tg6_reg); |
| 74 | } | |
| 75 | ||
| 76 | module_init(masquerade_tg6_init); | |
| 77 | module_exit(masquerade_tg6_exit); | |
| 78 | ||
| 79 | MODULE_LICENSE("GPL"); | |
| 80 | MODULE_AUTHOR("Patrick McHardy <[email protected]>"); | |
| 81 | MODULE_DESCRIPTION("Xtables: automatic address SNAT"); |