108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
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/* iptables module for using new netfilter netlink queue
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*
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* (C) 2005 by Harald Welte <laforge@netfilter.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/netfilter.h>
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#include <linux/netfilter_arp.h>
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#include <linux/netfilter/x_tables.h>
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#include <linux/netfilter/xt_NFQUEUE.h>
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MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
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MODULE_DESCRIPTION("[ip,ip6,arp]_tables NFQUEUE target");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("ipt_NFQUEUE");
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MODULE_ALIAS("ip6t_NFQUEUE");
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MODULE_ALIAS("arpt_NFQUEUE");
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static unsigned int
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target(struct sk_buff **pskb,
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const struct net_device *in,
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const struct net_device *out,
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unsigned int hooknum,
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const void *targinfo,
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void *userinfo)
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{
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const struct xt_NFQ_info *tinfo = targinfo;
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return NF_QUEUE_NR(tinfo->queuenum);
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}
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static int
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checkentry(const char *tablename,
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const void *entry,
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void *targinfo,
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unsigned int targinfosize,
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unsigned int hook_mask)
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{
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if (targinfosize != XT_ALIGN(sizeof(struct xt_NFQ_info))) {
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printk(KERN_WARNING "NFQUEUE: targinfosize %u != %Zu\n",
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targinfosize,
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XT_ALIGN(sizeof(struct xt_NFQ_info)));
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return 0;
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}
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return 1;
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}
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static struct xt_target ipt_NFQ_reg = {
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.name = "NFQUEUE",
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.target = target,
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.checkentry = checkentry,
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.me = THIS_MODULE,
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};
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static struct xt_target ip6t_NFQ_reg = {
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.name = "NFQUEUE",
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.target = target,
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.checkentry = checkentry,
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.me = THIS_MODULE,
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};
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static struct xt_target arpt_NFQ_reg = {
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.name = "NFQUEUE",
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.target = target,
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.checkentry = checkentry,
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.me = THIS_MODULE,
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};
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static int __init init(void)
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{
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int ret;
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ret = xt_register_target(AF_INET, &ipt_NFQ_reg);
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if (ret)
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return ret;
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ret = xt_register_target(AF_INET6, &ip6t_NFQ_reg);
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if (ret)
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goto out_ip;
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ret = xt_register_target(NF_ARP, &arpt_NFQ_reg);
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if (ret)
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goto out_ip6;
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return ret;
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out_ip6:
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xt_unregister_target(AF_INET6, &ip6t_NFQ_reg);
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out_ip:
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xt_unregister_target(AF_INET, &ipt_NFQ_reg);
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return ret;
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}
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static void __exit fini(void)
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{
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xt_unregister_target(NF_ARP, &arpt_NFQ_reg);
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xt_unregister_target(AF_INET6, &ip6t_NFQ_reg);
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xt_unregister_target(AF_INET, &ipt_NFQ_reg);
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}
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module_init(init);
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module_exit(fini);
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