projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| cc4723ca PM |
1 | /* |
| 2 | * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net> | |
| 3 | * Copyright (c) 2013 Eric Leblond <eric@regit.org> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License version 2 as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * Development of this code funded by Astaro AG (http://www.astaro.com/) | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/kernel.h> | |
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/module.h> | |
| 15 | #include <linux/netlink.h> | |
| 16 | #include <linux/netfilter.h> | |
| 17 | #include <linux/netfilter/nf_tables.h> | |
| 18 | #include <net/netfilter/nf_tables.h> | |
| cc4723ca PM |
19 | #include <net/netfilter/ipv4/nf_reject.h> |
| 20 | #include <net/netfilter/nft_reject.h> | |
| 21 | ||
| 56768644 | 22 | static void nft_reject_ipv4_eval(const struct nft_expr *expr, |
| a55e22e9 | 23 | struct nft_regs *regs, |
| 56768644 | 24 | const struct nft_pktinfo *pkt) |
| cc4723ca PM |
25 | { |
| 26 | struct nft_reject *priv = nft_expr_priv(expr); | |
| 27 | ||
| 28 | switch (priv->type) { | |
| 29 | case NFT_REJECT_ICMP_UNREACH: | |
| 6aa187f2 | 30 | nf_send_unreach(pkt->skb, priv->icmp_code, pkt->hook); |
| cc4723ca PM |
31 | break; |
| 32 | case NFT_REJECT_TCP_RST: | |
| 372892ec | 33 | nf_send_reset(pkt->net, pkt->skb, pkt->hook); |
| cc4723ca | 34 | break; |
| c1f86676 DM |
35 | default: |
| 36 | break; | |
| cc4723ca PM |
37 | } |
| 38 | ||
| a55e22e9 | 39 | regs->verdict.code = NF_DROP; |
| cc4723ca PM |
40 | } |
| 41 | ||
| 42 | static struct nft_expr_type nft_reject_ipv4_type; | |
| 43 | static const struct nft_expr_ops nft_reject_ipv4_ops = { | |
| 44 | .type = &nft_reject_ipv4_type, | |
| 45 | .size = NFT_EXPR_SIZE(sizeof(struct nft_reject)), | |
| 46 | .eval = nft_reject_ipv4_eval, | |
| 47 | .init = nft_reject_init, | |
| 48 | .dump = nft_reject_dump, | |
| 89e1f6d2 | 49 | .validate = nft_reject_validate, |
| cc4723ca PM |
50 | }; |
| 51 | ||
| 52 | static struct nft_expr_type nft_reject_ipv4_type __read_mostly = { | |
| 53 | .family = NFPROTO_IPV4, | |
| 54 | .name = "reject", | |
| 55 | .ops = &nft_reject_ipv4_ops, | |
| 56 | .policy = nft_reject_policy, | |
| 57 | .maxattr = NFTA_REJECT_MAX, | |
| 58 | .owner = THIS_MODULE, | |
| 59 | }; | |
| 60 | ||
| 61 | static int __init nft_reject_ipv4_module_init(void) | |
| 62 | { | |
| 63 | return nft_register_expr(&nft_reject_ipv4_type); | |
| 64 | } | |
| 65 | ||
| 66 | static void __exit nft_reject_ipv4_module_exit(void) | |
| 67 | { | |
| 68 | nft_unregister_expr(&nft_reject_ipv4_type); | |
| 69 | } | |
| 70 | ||
| 71 | module_init(nft_reject_ipv4_module_init); | |
| 72 | module_exit(nft_reject_ipv4_module_exit); | |
| 73 | ||
| 74 | MODULE_LICENSE("GPL"); | |
| 75 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
| 76 | MODULE_ALIAS_NFT_AF_EXPR(AF_INET, "reject"); |