root/net/ipv6/netfilter/nft_reject_ipv6.c

DEFINITIONS

1. nft_reject_ipv6_eval
2. nft_reject_ipv6_module_init
3. nft_reject_ipv6_module_exit

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
   4  * Copyright (c) 2013 Eric Leblond <eric@regit.org>
   5  *
   6  * Development of this code funded by Astaro AG (http://www.astaro.com/)
   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/nft_reject.h>
  17 #include <net/netfilter/ipv6/nf_reject.h>
  18 
  19 static void nft_reject_ipv6_eval(const struct nft_expr *expr,
  20                                  struct nft_regs *regs,
  21                                  const struct nft_pktinfo *pkt)
  22 {
  23         struct nft_reject *priv = nft_expr_priv(expr);
  24 
  25         switch (priv->type) {
  26         case NFT_REJECT_ICMP_UNREACH:
  27                 nf_send_unreach6(nft_net(pkt), pkt->skb, priv->icmp_code,
  28                                  nft_hook(pkt));
  29                 break;
  30         case NFT_REJECT_TCP_RST:
  31                 nf_send_reset6(nft_net(pkt), pkt->skb, nft_hook(pkt));
  32                 break;
  33         default:
  34                 break;
  35         }
  36 
  37         regs->verdict.code = NF_DROP;
  38 }
  39 
  40 static struct nft_expr_type nft_reject_ipv6_type;
  41 static const struct nft_expr_ops nft_reject_ipv6_ops = {
  42         .type           = &nft_reject_ipv6_type,
  43         .size           = NFT_EXPR_SIZE(sizeof(struct nft_reject)),
  44         .eval           = nft_reject_ipv6_eval,
  45         .init           = nft_reject_init,
  46         .dump           = nft_reject_dump,
  47         .validate       = nft_reject_validate,
  48 };
  49 
  50 static struct nft_expr_type nft_reject_ipv6_type __read_mostly = {
  51         .family         = NFPROTO_IPV6,
  52         .name           = "reject",
  53         .ops            = &nft_reject_ipv6_ops,
  54         .policy         = nft_reject_policy,
  55         .maxattr        = NFTA_REJECT_MAX,
  56         .owner          = THIS_MODULE,
  57 };
  58 
  59 static int __init nft_reject_ipv6_module_init(void)
  60 {
  61         return nft_register_expr(&nft_reject_ipv6_type);
  62 }
  63 
  64 static void __exit nft_reject_ipv6_module_exit(void)
  65 {
  66         nft_unregister_expr(&nft_reject_ipv6_type);
  67 }
  68 
  69 module_init(nft_reject_ipv6_module_init);
  70 module_exit(nft_reject_ipv6_module_exit);
  71 
  72 MODULE_LICENSE("GPL");
  73 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
  74 MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "reject");