projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| e9105f1b | 1 | /* |
| cd727514 | 2 | * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo@debian.org> |
| e9105f1b AB |
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> | |
| b59eaf9e | 18 | #include <net/netfilter/nf_nat_redirect.h> |
| e9105f1b AB |
19 | |
| 20 | static void nft_redir_ipv6_eval(const struct nft_expr *expr, | |
| a55e22e9 | 21 | struct nft_regs *regs, |
| e9105f1b AB |
22 | const struct nft_pktinfo *pkt) |
| 23 | { | |
| 24 | struct nft_redir *priv = nft_expr_priv(expr); | |
| 25 | struct nf_nat_range range; | |
| e9105f1b AB |
26 | |
| 27 | memset(&range, 0, sizeof(range)); | |
| 28 | if (priv->sreg_proto_min) { | |
| 10596608 LZ |
29 | range.min_proto.all = (__force __be16)nft_reg_load16( |
| 30 | ®s->data[priv->sreg_proto_min]); | |
| 31 | range.max_proto.all = (__force __be16)nft_reg_load16( | |
| 32 | ®s->data[priv->sreg_proto_max]); | |
| e9105f1b AB |
33 | range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; |
| 34 | } | |
| 35 | ||
| 36 | range.flags |= priv->flags; | |
| 37 | ||
| 0e5a1c7e PNA |
38 | regs->verdict.code = |
| 39 | nf_nat_redirect_ipv6(pkt->skb, &range, nft_hook(pkt)); | |
| e9105f1b AB |
40 | } |
| 41 | ||
| 20afd423 FW |
42 | static void |
| 43 | nft_redir_ipv6_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) | |
| 44 | { | |
| 45 | nf_ct_netns_put(ctx->net, NFPROTO_IPV6); | |
| 46 | } | |
| 47 | ||
| e9105f1b AB |
48 | static struct nft_expr_type nft_redir_ipv6_type; |
| 49 | static const struct nft_expr_ops nft_redir_ipv6_ops = { | |
| 50 | .type = &nft_redir_ipv6_type, | |
| 51 | .size = NFT_EXPR_SIZE(sizeof(struct nft_redir)), | |
| 52 | .eval = nft_redir_ipv6_eval, | |
| 53 | .init = nft_redir_init, | |
| 20afd423 | 54 | .destroy = nft_redir_ipv6_destroy, |
| e9105f1b AB |
55 | .dump = nft_redir_dump, |
| 56 | .validate = nft_redir_validate, | |
| 57 | }; | |
| 58 | ||
| 59 | static struct nft_expr_type nft_redir_ipv6_type __read_mostly = { | |
| 60 | .family = NFPROTO_IPV6, | |
| 61 | .name = "redir", | |
| 62 | .ops = &nft_redir_ipv6_ops, | |
| 63 | .policy = nft_redir_policy, | |
| 64 | .maxattr = NFTA_REDIR_MAX, | |
| 65 | .owner = THIS_MODULE, | |
| 66 | }; | |
| 67 | ||
| 68 | static int __init nft_redir_ipv6_module_init(void) | |
| 69 | { | |
| 70 | return nft_register_expr(&nft_redir_ipv6_type); | |
| 71 | } | |
| 72 | ||
| 73 | static void __exit nft_redir_ipv6_module_exit(void) | |
| 74 | { | |
| 75 | nft_unregister_expr(&nft_redir_ipv6_type); | |
| 76 | } | |
| 77 | ||
| 78 | module_init(nft_redir_ipv6_module_init); | |
| 79 | module_exit(nft_redir_ipv6_module_exit); | |
| 80 | ||
| 81 | MODULE_LICENSE("GPL"); | |
| cd727514 | 82 | MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo@debian.org>"); |
| e9105f1b | 83 | MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "redir"); |