Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1 | /* iptables module for using new netfilter netlink queue |
| 2 | * |
| 3 | * (C) 2005 by Harald Welte <laforge@netfilter.org> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/skbuff.h> |
| 13 | |
| 14 | #include <linux/netfilter.h> |
| 15 | #include <linux/netfilter_arp.h> |
| 16 | #include <linux/netfilter/x_tables.h> |
| 17 | #include <linux/netfilter/xt_NFQUEUE.h> |
| 18 | |
| 19 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); |
| 20 | MODULE_DESCRIPTION("[ip,ip6,arp]_tables NFQUEUE target"); |
| 21 | MODULE_LICENSE("GPL"); |
| 22 | MODULE_ALIAS("ipt_NFQUEUE"); |
| 23 | MODULE_ALIAS("ip6t_NFQUEUE"); |
| 24 | MODULE_ALIAS("arpt_NFQUEUE"); |
| 25 | |
| 26 | static unsigned int |
| 27 | target(struct sk_buff **pskb, |
| 28 | const struct net_device *in, |
| 29 | const struct net_device *out, |
| 30 | unsigned int hooknum, |
| 31 | const void *targinfo, |
| 32 | void *userinfo) |
| 33 | { |
| 34 | const struct xt_NFQ_info *tinfo = targinfo; |
| 35 | |
| 36 | return NF_QUEUE_NR(tinfo->queuenum); |
| 37 | } |
| 38 | |
| 39 | static int |
| 40 | checkentry(const char *tablename, |
| 41 | const void *entry, |
| 42 | void *targinfo, |
| 43 | unsigned int targinfosize, |
| 44 | unsigned int hook_mask) |
| 45 | { |
| 46 | if (targinfosize != XT_ALIGN(sizeof(struct xt_NFQ_info))) { |
| 47 | printk(KERN_WARNING "NFQUEUE: targinfosize %u != %Zu\n", |
| 48 | targinfosize, |
| 49 | XT_ALIGN(sizeof(struct xt_NFQ_info))); |
| 50 | return 0; |
| 51 | } |
| 52 | |
| 53 | return 1; |
| 54 | } |
| 55 | |
| 56 | static struct xt_target ipt_NFQ_reg = { |
| 57 | .name = "NFQUEUE", |
| 58 | .target = target, |
| 59 | .checkentry = checkentry, |
| 60 | .me = THIS_MODULE, |
| 61 | }; |
| 62 | |
| 63 | static struct xt_target ip6t_NFQ_reg = { |
| 64 | .name = "NFQUEUE", |
| 65 | .target = target, |
| 66 | .checkentry = checkentry, |
| 67 | .me = THIS_MODULE, |
| 68 | }; |
| 69 | |
| 70 | static struct xt_target arpt_NFQ_reg = { |
| 71 | .name = "NFQUEUE", |
| 72 | .target = target, |
| 73 | .checkentry = checkentry, |
| 74 | .me = THIS_MODULE, |
| 75 | }; |
| 76 | |
| 77 | static int __init init(void) |
| 78 | { |
| 79 | int ret; |
| 80 | ret = xt_register_target(AF_INET, &ipt_NFQ_reg); |
| 81 | if (ret) |
| 82 | return ret; |
| 83 | ret = xt_register_target(AF_INET6, &ip6t_NFQ_reg); |
| 84 | if (ret) |
| 85 | goto out_ip; |
| 86 | ret = xt_register_target(NF_ARP, &arpt_NFQ_reg); |
| 87 | if (ret) |
| 88 | goto out_ip6; |
| 89 | |
| 90 | return ret; |
| 91 | out_ip6: |
| 92 | xt_unregister_target(AF_INET6, &ip6t_NFQ_reg); |
| 93 | out_ip: |
| 94 | xt_unregister_target(AF_INET, &ipt_NFQ_reg); |
| 95 | |
| 96 | return ret; |
| 97 | } |
| 98 | |
| 99 | static void __exit fini(void) |
| 100 | { |
| 101 | xt_unregister_target(NF_ARP, &arpt_NFQ_reg); |
| 102 | xt_unregister_target(AF_INET6, &ip6t_NFQ_reg); |
| 103 | xt_unregister_target(AF_INET, &ipt_NFQ_reg); |
| 104 | } |
| 105 | |
| 106 | module_init(init); |
| 107 | module_exit(fini); |