1/* 2 * IPv6 raw table, a port of the IPv4 raw table to IPv6 3 * 4 * Copyright (C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> 5 */ 6#include <linux/module.h> 7#include <linux/netfilter_ipv6/ip6_tables.h> 8#include <linux/slab.h> 9 10#define RAW_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT)) 11 12static const struct xt_table packet_raw = { 13 .name = "raw", 14 .valid_hooks = RAW_VALID_HOOKS, 15 .me = THIS_MODULE, 16 .af = NFPROTO_IPV6, 17 .priority = NF_IP6_PRI_RAW, 18}; 19 20/* The work comes in here from netfilter.c. */ 21static unsigned int 22ip6table_raw_hook(unsigned int hook, struct sk_buff *skb, 23 const struct net_device *in, const struct net_device *out, 24 int (*okfn)(struct sk_buff *)) 25{ 26 const struct net *net = dev_net((in != NULL) ? in : out); 27 28 return ip6t_do_table(skb, hook, in, out, net->ipv6.ip6table_raw); 29} 30 31static struct nf_hook_ops *rawtable_ops __read_mostly; 32 33static int __net_init ip6table_raw_net_init(struct net *net) 34{ 35 struct ip6t_replace *repl; 36 37 repl = ip6t_alloc_initial_table(&packet_raw); 38 if (repl == NULL) 39 return -ENOMEM; 40 net->ipv6.ip6table_raw = 41 ip6t_register_table(net, &packet_raw, repl); 42 kfree(repl); 43 if (IS_ERR(net->ipv6.ip6table_raw)) 44 return PTR_ERR(net->ipv6.ip6table_raw); 45 return 0; 46} 47 48static void __net_exit ip6table_raw_net_exit(struct net *net) 49{ 50 ip6t_unregister_table(net, net->ipv6.ip6table_raw); 51} 52 53static struct pernet_operations ip6table_raw_net_ops = { 54 .init = ip6table_raw_net_init, 55 .exit = ip6table_raw_net_exit, 56}; 57 58static int __init ip6table_raw_init(void) 59{ 60 int ret; 61 62 ret = register_pernet_subsys(&ip6table_raw_net_ops); 63 if (ret < 0) 64 return ret; 65 66 /* Register hooks */ 67 rawtable_ops = xt_hook_link(&packet_raw, ip6table_raw_hook); 68 if (IS_ERR(rawtable_ops)) { 69 ret = PTR_ERR(rawtable_ops); 70 goto cleanup_table; 71 } 72 73 return ret; 74 75 cleanup_table: 76 unregister_pernet_subsys(&ip6table_raw_net_ops); 77 return ret; 78} 79 80static void __exit ip6table_raw_fini(void) 81{ 82 xt_hook_unlink(&packet_raw, rawtable_ops); 83 unregister_pernet_subsys(&ip6table_raw_net_ops); 84} 85 86module_init(ip6table_raw_init); 87module_exit(ip6table_raw_fini); 88MODULE_LICENSE("GPL"); 89