Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 9 | #define RAW_VALID_HOOKS ((1 << NF_IP6_PRE_ROUTING) | (1 << NF_IP6_LOCAL_OUT)) |
| 10 | |
| 11 | #if 0 |
| 12 | #define DEBUGP(x, args...) printk(KERN_DEBUG x, ## args) |
| 13 | #else |
| 14 | #define DEBUGP(x, args...) |
| 15 | #endif |
| 16 | |
| 17 | /* Standard entry. */ |
| 18 | struct ip6t_standard |
| 19 | { |
| 20 | struct ip6t_entry entry; |
| 21 | struct ip6t_standard_target target; |
| 22 | }; |
| 23 | |
| 24 | struct ip6t_error_target |
| 25 | { |
| 26 | struct ip6t_entry_target target; |
| 27 | char errorname[IP6T_FUNCTION_MAXNAMELEN]; |
| 28 | }; |
| 29 | |
| 30 | struct ip6t_error |
| 31 | { |
| 32 | struct ip6t_entry entry; |
| 33 | struct ip6t_error_target target; |
| 34 | }; |
| 35 | |
| 36 | static struct |
| 37 | { |
| 38 | struct ip6t_replace repl; |
| 39 | struct ip6t_standard entries[2]; |
| 40 | struct ip6t_error term; |
| 41 | } initial_table __initdata = { |
| 42 | .repl = { |
| 43 | .name = "raw", |
| 44 | .valid_hooks = RAW_VALID_HOOKS, |
| 45 | .num_entries = 3, |
| 46 | .size = sizeof(struct ip6t_standard) * 2 + sizeof(struct ip6t_error), |
| 47 | .hook_entry = { |
| 48 | [NF_IP6_PRE_ROUTING] = 0, |
| 49 | [NF_IP6_LOCAL_OUT] = sizeof(struct ip6t_standard) |
| 50 | }, |
| 51 | .underflow = { |
| 52 | [NF_IP6_PRE_ROUTING] = 0, |
| 53 | [NF_IP6_LOCAL_OUT] = sizeof(struct ip6t_standard) |
| 54 | }, |
| 55 | }, |
| 56 | .entries = { |
| 57 | /* PRE_ROUTING */ |
| 58 | { |
| 59 | .entry = { |
| 60 | .target_offset = sizeof(struct ip6t_entry), |
| 61 | .next_offset = sizeof(struct ip6t_standard), |
| 62 | }, |
| 63 | .target = { |
| 64 | .target = { |
| 65 | .u = { |
| 66 | .target_size = IP6T_ALIGN(sizeof(struct ip6t_standard_target)), |
| 67 | }, |
| 68 | }, |
| 69 | .verdict = -NF_ACCEPT - 1, |
| 70 | }, |
| 71 | }, |
| 72 | |
| 73 | /* LOCAL_OUT */ |
| 74 | { |
| 75 | .entry = { |
| 76 | .target_offset = sizeof(struct ip6t_entry), |
| 77 | .next_offset = sizeof(struct ip6t_standard), |
| 78 | }, |
| 79 | .target = { |
| 80 | .target = { |
| 81 | .u = { |
| 82 | .target_size = IP6T_ALIGN(sizeof(struct ip6t_standard_target)), |
| 83 | }, |
| 84 | }, |
| 85 | .verdict = -NF_ACCEPT - 1, |
| 86 | }, |
| 87 | }, |
| 88 | }, |
| 89 | /* ERROR */ |
| 90 | .term = { |
| 91 | .entry = { |
| 92 | .target_offset = sizeof(struct ip6t_entry), |
| 93 | .next_offset = sizeof(struct ip6t_error), |
| 94 | }, |
| 95 | .target = { |
| 96 | .target = { |
| 97 | .u = { |
| 98 | .user = { |
| 99 | .target_size = IP6T_ALIGN(sizeof(struct ip6t_error_target)), |
| 100 | .name = IP6T_ERROR_TARGET, |
| 101 | }, |
| 102 | }, |
| 103 | }, |
| 104 | .errorname = "ERROR", |
| 105 | }, |
| 106 | } |
| 107 | }; |
| 108 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 109 | static struct xt_table packet_raw = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | .name = "raw", |
| 111 | .valid_hooks = RAW_VALID_HOOKS, |
| 112 | .lock = RW_LOCK_UNLOCKED, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 113 | .me = THIS_MODULE, |
| 114 | .af = AF_INET6, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | }; |
| 116 | |
| 117 | /* The work comes in here from netfilter.c. */ |
| 118 | static unsigned int |
| 119 | ip6t_hook(unsigned int hook, |
| 120 | struct sk_buff **pskb, |
| 121 | const struct net_device *in, |
| 122 | const struct net_device *out, |
| 123 | int (*okfn)(struct sk_buff *)) |
| 124 | { |
| 125 | return ip6t_do_table(pskb, hook, in, out, &packet_raw, NULL); |
| 126 | } |
| 127 | |
| 128 | static struct nf_hook_ops ip6t_ops[] = { |
| 129 | { |
| 130 | .hook = ip6t_hook, |
| 131 | .pf = PF_INET6, |
| 132 | .hooknum = NF_IP6_PRE_ROUTING, |
Patrick McHardy | 97216c7 | 2005-06-21 14:03:01 -0700 | [diff] [blame] | 133 | .priority = NF_IP6_PRI_FIRST, |
| 134 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | }, |
| 136 | { |
| 137 | .hook = ip6t_hook, |
| 138 | .pf = PF_INET6, |
| 139 | .hooknum = NF_IP6_LOCAL_OUT, |
Patrick McHardy | 97216c7 | 2005-06-21 14:03:01 -0700 | [diff] [blame] | 140 | .priority = NF_IP6_PRI_FIRST, |
| 141 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | }, |
| 143 | }; |
| 144 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 145 | static int __init ip6table_raw_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
| 147 | int ret; |
| 148 | |
| 149 | /* Register table */ |
| 150 | ret = ip6t_register_table(&packet_raw, &initial_table.repl); |
| 151 | if (ret < 0) |
| 152 | return ret; |
| 153 | |
| 154 | /* Register hooks */ |
Patrick McHardy | 964ddaa | 2006-04-06 14:09:49 -0700 | [diff] [blame] | 155 | ret = nf_register_hooks(ip6t_ops, ARRAY_SIZE(ip6t_ops)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | if (ret < 0) |
| 157 | goto cleanup_table; |
| 158 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | return ret; |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | cleanup_table: |
| 162 | ip6t_unregister_table(&packet_raw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | return ret; |
| 164 | } |
| 165 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 166 | static void __exit ip6table_raw_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | { |
Patrick McHardy | 964ddaa | 2006-04-06 14:09:49 -0700 | [diff] [blame] | 168 | nf_unregister_hooks(ip6t_ops, ARRAY_SIZE(ip6t_ops)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | ip6t_unregister_table(&packet_raw); |
| 170 | } |
| 171 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 172 | module_init(ip6table_raw_init); |
| 173 | module_exit(ip6table_raw_fini); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | MODULE_LICENSE("GPL"); |