projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| e9105f1b AB |
1 | /* |
| 2 | * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> | |
| 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 | ||
| 9 | #include <linux/kernel.h> | |
| 10 | #include <linux/init.h> | |
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/netlink.h> | |
| 13 | #include <linux/netfilter.h> | |
| 14 | #include <linux/netfilter/nf_tables.h> | |
| 15 | #include <net/netfilter/nf_tables.h> | |
| 16 | #include <net/netfilter/nf_nat.h> | |
| 17 | #include <net/netfilter/nft_redir.h> | |
| 18 | #include <net/netfilter/ipv6/nf_nat_redirect.h> | |
| 19 | ||
| 20 | static void nft_redir_ipv6_eval(const struct nft_expr *expr, | |
| 21 | struct nft_data data[NFT_REG_MAX + 1], | |
| 22 | const struct nft_pktinfo *pkt) | |
| 23 | { | |
| 24 | struct nft_redir *priv = nft_expr_priv(expr); | |
| 25 | struct nf_nat_range range; | |
| 26 | unsigned int verdict; | |
| 27 | ||
| 28 | memset(&range, 0, sizeof(range)); | |
| 29 | if (priv->sreg_proto_min) { | |
| 30 | range.min_proto.all = (__force __be16) | |
| 31 | data[priv->sreg_proto_min].data[0]; | |
| 32 | range.max_proto.all = (__force __be16) | |
| 33 | data[priv->sreg_proto_max].data[0]; | |
| 34 | range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; | |
| 35 | } | |
| 36 | ||
| 37 | range.flags |= priv->flags; | |
| 38 | ||
| 39 | verdict = nf_nat_redirect_ipv6(pkt->skb, &range, pkt->ops->hooknum); | |
| 40 | data[NFT_REG_VERDICT].verdict = verdict; | |
| 41 | } | |
| 42 | ||
| 43 | static struct nft_expr_type nft_redir_ipv6_type; | |
| 44 | static const struct nft_expr_ops nft_redir_ipv6_ops = { | |
| 45 | .type = &nft_redir_ipv6_type, | |
| 46 | .size = NFT_EXPR_SIZE(sizeof(struct nft_redir)), | |
| 47 | .eval = nft_redir_ipv6_eval, | |
| 48 | .init = nft_redir_init, | |
| 49 | .dump = nft_redir_dump, | |
| 50 | .validate = nft_redir_validate, | |
| 51 | }; | |
| 52 | ||
| 53 | static struct nft_expr_type nft_redir_ipv6_type __read_mostly = { | |
| 54 | .family = NFPROTO_IPV6, | |
| 55 | .name = "redir", | |
| 56 | .ops = &nft_redir_ipv6_ops, | |
| 57 | .policy = nft_redir_policy, | |
| 58 | .maxattr = NFTA_REDIR_MAX, | |
| 59 | .owner = THIS_MODULE, | |
| 60 | }; | |
| 61 | ||
| 62 | static int __init nft_redir_ipv6_module_init(void) | |
| 63 | { | |
| 64 | return nft_register_expr(&nft_redir_ipv6_type); | |
| 65 | } | |
| 66 | ||
| 67 | static void __exit nft_redir_ipv6_module_exit(void) | |
| 68 | { | |
| 69 | nft_unregister_expr(&nft_redir_ipv6_type); | |
| 70 | } | |
| 71 | ||
| 72 | module_init(nft_redir_ipv6_module_init); | |
| 73 | module_exit(nft_redir_ipv6_module_exit); | |
| 74 | ||
| 75 | MODULE_LICENSE("GPL"); | |
| 76 | MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>"); | |
| 77 | MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "redir"); |