Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * 'raw' table, which is the very first hooked in at PRE_ROUTING and LOCAL_OUT . |
| 3 | * |
| 4 | * Copyright (C) 2003 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
| 5 | */ |
| 6 | #include <linux/module.h> |
| 7 | #include <linux/netfilter_ipv4/ip_tables.h> |
| 8 | |
| 9 | #define RAW_VALID_HOOKS ((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_OUT)) |
| 10 | |
| 11 | static struct |
| 12 | { |
| 13 | struct ipt_replace repl; |
| 14 | struct ipt_standard entries[2]; |
| 15 | struct ipt_error term; |
| 16 | } initial_table __initdata = { |
| 17 | .repl = { |
| 18 | .name = "raw", |
| 19 | .valid_hooks = RAW_VALID_HOOKS, |
| 20 | .num_entries = 3, |
| 21 | .size = sizeof(struct ipt_standard) * 2 + sizeof(struct ipt_error), |
| 22 | .hook_entry = { |
| 23 | [NF_IP_PRE_ROUTING] = 0, |
| 24 | [NF_IP_LOCAL_OUT] = sizeof(struct ipt_standard) }, |
| 25 | .underflow = { |
| 26 | [NF_IP_PRE_ROUTING] = 0, |
| 27 | [NF_IP_LOCAL_OUT] = sizeof(struct ipt_standard) }, |
| 28 | }, |
| 29 | .entries = { |
| 30 | /* PRE_ROUTING */ |
| 31 | { |
| 32 | .entry = { |
| 33 | .target_offset = sizeof(struct ipt_entry), |
| 34 | .next_offset = sizeof(struct ipt_standard), |
| 35 | }, |
| 36 | .target = { |
| 37 | .target = { |
| 38 | .u = { |
| 39 | .target_size = IPT_ALIGN(sizeof(struct ipt_standard_target)), |
| 40 | }, |
| 41 | }, |
| 42 | .verdict = -NF_ACCEPT - 1, |
| 43 | }, |
| 44 | }, |
| 45 | |
| 46 | /* LOCAL_OUT */ |
| 47 | { |
| 48 | .entry = { |
| 49 | .target_offset = sizeof(struct ipt_entry), |
| 50 | .next_offset = sizeof(struct ipt_standard), |
| 51 | }, |
| 52 | .target = { |
| 53 | .target = { |
| 54 | .u = { |
| 55 | .target_size = IPT_ALIGN(sizeof(struct ipt_standard_target)), |
| 56 | }, |
| 57 | }, |
| 58 | .verdict = -NF_ACCEPT - 1, |
| 59 | }, |
| 60 | }, |
| 61 | }, |
| 62 | /* ERROR */ |
| 63 | .term = { |
| 64 | .entry = { |
| 65 | .target_offset = sizeof(struct ipt_entry), |
| 66 | .next_offset = sizeof(struct ipt_error), |
| 67 | }, |
| 68 | .target = { |
| 69 | .target = { |
| 70 | .u = { |
| 71 | .user = { |
| 72 | .target_size = IPT_ALIGN(sizeof(struct ipt_error_target)), |
| 73 | .name = IPT_ERROR_TARGET, |
| 74 | }, |
| 75 | }, |
| 76 | }, |
| 77 | .errorname = "ERROR", |
| 78 | }, |
| 79 | } |
| 80 | }; |
| 81 | |
| 82 | static struct ipt_table packet_raw = { |
| 83 | .name = "raw", |
| 84 | .valid_hooks = RAW_VALID_HOOKS, |
| 85 | .lock = RW_LOCK_UNLOCKED, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 86 | .me = THIS_MODULE, |
| 87 | .af = AF_INET, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | }; |
| 89 | |
| 90 | /* The work comes in here from netfilter.c. */ |
| 91 | static unsigned int |
| 92 | ipt_hook(unsigned int hook, |
| 93 | struct sk_buff **pskb, |
| 94 | const struct net_device *in, |
| 95 | const struct net_device *out, |
| 96 | int (*okfn)(struct sk_buff *)) |
| 97 | { |
| 98 | return ipt_do_table(pskb, hook, in, out, &packet_raw, NULL); |
| 99 | } |
| 100 | |
| 101 | /* 'raw' is the very first table. */ |
| 102 | static struct nf_hook_ops ipt_ops[] = { |
| 103 | { |
| 104 | .hook = ipt_hook, |
| 105 | .pf = PF_INET, |
| 106 | .hooknum = NF_IP_PRE_ROUTING, |
Patrick McHardy | b433095 | 2005-05-03 14:23:13 -0700 | [diff] [blame] | 107 | .priority = NF_IP_PRI_RAW, |
| 108 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | }, |
| 110 | { |
| 111 | .hook = ipt_hook, |
| 112 | .pf = PF_INET, |
| 113 | .hooknum = NF_IP_LOCAL_OUT, |
Patrick McHardy | b433095 | 2005-05-03 14:23:13 -0700 | [diff] [blame] | 114 | .priority = NF_IP_PRI_RAW, |
| 115 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | }, |
| 117 | }; |
| 118 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 119 | static int __init iptable_raw_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | { |
| 121 | int ret; |
| 122 | |
| 123 | /* Register table */ |
| 124 | ret = ipt_register_table(&packet_raw, &initial_table.repl); |
| 125 | if (ret < 0) |
| 126 | return ret; |
| 127 | |
| 128 | /* Register hooks */ |
| 129 | ret = nf_register_hook(&ipt_ops[0]); |
| 130 | if (ret < 0) |
| 131 | goto cleanup_table; |
| 132 | |
| 133 | ret = nf_register_hook(&ipt_ops[1]); |
| 134 | if (ret < 0) |
| 135 | goto cleanup_hook0; |
| 136 | |
| 137 | return ret; |
| 138 | |
| 139 | cleanup_hook0: |
| 140 | nf_unregister_hook(&ipt_ops[0]); |
| 141 | cleanup_table: |
| 142 | ipt_unregister_table(&packet_raw); |
| 143 | |
| 144 | return ret; |
| 145 | } |
| 146 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 147 | static void __exit iptable_raw_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
| 149 | unsigned int i; |
| 150 | |
| 151 | for (i = 0; i < sizeof(ipt_ops)/sizeof(struct nf_hook_ops); i++) |
| 152 | nf_unregister_hook(&ipt_ops[i]); |
| 153 | |
| 154 | ipt_unregister_table(&packet_raw); |
| 155 | } |
| 156 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 157 | module_init(iptable_raw_init); |
| 158 | module_exit(iptable_raw_fini); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | MODULE_LICENSE("GPL"); |