1 // SPDX-License-Identifier: GPL-2.0-only
3 * IPv6 raw table, a port of the IPv4 raw table to IPv6
5 * Copyright (C) 2003 Jozsef Kadlecsik <kadlec@netfilter.org>
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8 #include <linux/module.h>
9 #include <linux/netfilter_ipv6/ip6_tables.h>
10 #include <linux/slab.h>
12 #define RAW_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT))
14 static bool raw_before_defrag __read_mostly;
15 MODULE_PARM_DESC(raw_before_defrag, "Enable raw table before defrag");
16 module_param(raw_before_defrag, bool, 0000);
18 static const struct xt_table packet_raw = {
20 .valid_hooks = RAW_VALID_HOOKS,
23 .priority = NF_IP6_PRI_RAW,
26 static const struct xt_table packet_raw_before_defrag = {
28 .valid_hooks = RAW_VALID_HOOKS,
31 .priority = NF_IP6_PRI_RAW_BEFORE_DEFRAG,
34 /* The work comes in here from netfilter.c. */
36 ip6table_raw_hook(void *priv, struct sk_buff *skb,
37 const struct nf_hook_state *state)
39 return ip6t_do_table(skb, state, priv);
42 static struct nf_hook_ops *rawtable_ops __read_mostly;
44 static int ip6table_raw_table_init(struct net *net)
46 struct ip6t_replace *repl;
47 const struct xt_table *table = &packet_raw;
50 if (raw_before_defrag)
51 table = &packet_raw_before_defrag;
53 repl = ip6t_alloc_initial_table(table);
56 ret = ip6t_register_table(net, table, repl, rawtable_ops);
61 static void __net_exit ip6table_raw_net_pre_exit(struct net *net)
63 ip6t_unregister_table_pre_exit(net, "raw");
66 static void __net_exit ip6table_raw_net_exit(struct net *net)
68 ip6t_unregister_table_exit(net, "raw");
71 static struct pernet_operations ip6table_raw_net_ops = {
72 .pre_exit = ip6table_raw_net_pre_exit,
73 .exit = ip6table_raw_net_exit,
76 static int __init ip6table_raw_init(void)
78 const struct xt_table *table = &packet_raw;
81 if (raw_before_defrag) {
82 table = &packet_raw_before_defrag;
83 pr_info("Enabling raw table before defrag\n");
86 ret = xt_register_template(table, ip6table_raw_table_init);
91 rawtable_ops = xt_hook_ops_alloc(table, ip6table_raw_hook);
92 if (IS_ERR(rawtable_ops)) {
93 xt_unregister_template(table);
94 return PTR_ERR(rawtable_ops);
97 ret = register_pernet_subsys(&ip6table_raw_net_ops);
100 xt_unregister_template(table);
107 static void __exit ip6table_raw_fini(void)
109 unregister_pernet_subsys(&ip6table_raw_net_ops);
110 xt_unregister_template(&packet_raw);
114 module_init(ip6table_raw_init);
115 module_exit(ip6table_raw_fini);
116 MODULE_LICENSE("GPL");