2 * 'raw' table, which is the very first hooked in at PRE_ROUTING and LOCAL_OUT .
4 * Copyright (C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
6 #include <linux/module.h>
7 #include <linux/netfilter_ipv4/ip_tables.h>
10 #define RAW_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT))
14 struct ipt_replace repl;
15 struct ipt_standard entries[2];
16 struct ipt_error term;
17 } initial_table __initdata = {
20 .valid_hooks = RAW_VALID_HOOKS,
22 .size = sizeof(struct ipt_standard) * 2 + sizeof(struct ipt_error),
24 [NF_INET_PRE_ROUTING] = 0,
25 [NF_INET_LOCAL_OUT] = sizeof(struct ipt_standard)
28 [NF_INET_PRE_ROUTING] = 0,
29 [NF_INET_LOCAL_OUT] = sizeof(struct ipt_standard)
33 IPT_STANDARD_INIT(NF_ACCEPT), /* PRE_ROUTING */
34 IPT_STANDARD_INIT(NF_ACCEPT), /* LOCAL_OUT */
36 .term = IPT_ERROR_INIT, /* ERROR */
39 static struct xt_table __packet_raw = {
41 .valid_hooks = RAW_VALID_HOOKS,
42 .lock = RW_LOCK_UNLOCKED,
46 static struct xt_table *packet_raw;
48 /* The work comes in here from netfilter.c. */
50 ipt_hook(unsigned int hook,
52 const struct net_device *in,
53 const struct net_device *out,
54 int (*okfn)(struct sk_buff *))
56 return ipt_do_table(skb, hook, in, out, packet_raw);
60 ipt_local_hook(unsigned int hook,
62 const struct net_device *in,
63 const struct net_device *out,
64 int (*okfn)(struct sk_buff *))
66 /* root is playing with raw sockets. */
67 if (skb->len < sizeof(struct iphdr) ||
68 ip_hdrlen(skb) < sizeof(struct iphdr)) {
70 printk("iptable_raw: ignoring short SOCK_RAW "
74 return ipt_do_table(skb, hook, in, out, packet_raw);
77 /* 'raw' is the very first table. */
78 static struct nf_hook_ops ipt_ops[] __read_mostly = {
82 .hooknum = NF_INET_PRE_ROUTING,
83 .priority = NF_IP_PRI_RAW,
87 .hook = ipt_local_hook,
89 .hooknum = NF_INET_LOCAL_OUT,
90 .priority = NF_IP_PRI_RAW,
95 static int __init iptable_raw_init(void)
100 packet_raw = ipt_register_table(&init_net, &__packet_raw,
101 &initial_table.repl);
102 if (IS_ERR(packet_raw))
103 return PTR_ERR(packet_raw);
106 ret = nf_register_hooks(ipt_ops, ARRAY_SIZE(ipt_ops));
113 ipt_unregister_table(packet_raw);
117 static void __exit iptable_raw_fini(void)
119 nf_unregister_hooks(ipt_ops, ARRAY_SIZE(ipt_ops));
120 ipt_unregister_table(packet_raw);
123 module_init(iptable_raw_init);
124 module_exit(iptable_raw_fini);
125 MODULE_LICENSE("GPL");