net/netfilter/nft_reject_inet.c

   1 /*
   2  * Copyright (c) 2014 Patrick McHardy <kaber@trash.net>
   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/nft_reject.h>
  17
  18 static void nft_reject_inet_eval(const struct nft_expr *expr,
  19                                  struct nft_data data[NFT_REG_MAX + 1],
  20                                  const struct nft_pktinfo *pkt)
  21 {
  22         switch (pkt->ops->pf) {
  23         case NFPROTO_IPV4:
  24                 return nft_reject_ipv4_eval(expr, data, pkt);
  25         case NFPROTO_IPV6:
  26                 return nft_reject_ipv6_eval(expr, data, pkt);
  27         }
  28 }
  29
  30 static struct nft_expr_type nft_reject_inet_type;
  31 static const struct nft_expr_ops nft_reject_inet_ops = {
  32         .type           = &nft_reject_inet_type,
  33         .size           = NFT_EXPR_SIZE(sizeof(struct nft_reject)),
  34         .eval           = nft_reject_inet_eval,
  35         .init           = nft_reject_init,
  36         .dump           = nft_reject_dump,
  37 };
  38
  39 static struct nft_expr_type nft_reject_inet_type __read_mostly = {
  40         .family         = NFPROTO_INET,
  41         .name           = "reject",
  42         .ops            = &nft_reject_inet_ops,
  43         .policy         = nft_reject_policy,
  44         .maxattr        = NFTA_REJECT_MAX,
  45         .owner          = THIS_MODULE,
  46 };
  47
  48 static int __init nft_reject_inet_module_init(void)
  49 {
  50         return nft_register_expr(&nft_reject_inet_type);
  51 }
  52
  53 static void __exit nft_reject_inet_module_exit(void)
  54 {
  55         nft_unregister_expr(&nft_reject_inet_type);
  56 }
  57
  58 module_init(nft_reject_inet_module_init);
  59 module_exit(nft_reject_inet_module_exit);
  60
  61 MODULE_LICENSE("GPL");
  62 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
  63 MODULE_ALIAS_NFT_AF_EXPR(1, "reject");