65b4b4e81a
Every netfilter module uses `init' for its module_init() function and `fini' or `cleanup' for its module_exit() function. Problem is, this creates uninformative initcall_debug output and makes ctags rather useless. So go through and rename them all to $(filename)_init and $(filename)_fini. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/* IP tables module for matching the value of the TTL
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*
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* ipt_ttl.c,v 1.5 2000/11/13 11:16:08 laforge Exp
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*
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* (C) 2000,2001 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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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/netfilter_ipv4/ipt_ttl.h>
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#include <linux/netfilter_ipv4/ip_tables.h>
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MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
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MODULE_DESCRIPTION("IP tables TTL matching module");
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MODULE_LICENSE("GPL");
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static int match(const struct sk_buff *skb,
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const struct net_device *in, const struct net_device *out,
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const struct xt_match *match, const void *matchinfo,
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int offset, unsigned int protoff, int *hotdrop)
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{
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const struct ipt_ttl_info *info = matchinfo;
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switch (info->mode) {
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case IPT_TTL_EQ:
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return (skb->nh.iph->ttl == info->ttl);
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break;
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case IPT_TTL_NE:
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return (!(skb->nh.iph->ttl == info->ttl));
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break;
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case IPT_TTL_LT:
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return (skb->nh.iph->ttl < info->ttl);
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break;
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case IPT_TTL_GT:
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return (skb->nh.iph->ttl > info->ttl);
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break;
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default:
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printk(KERN_WARNING "ipt_ttl: unknown mode %d\n",
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info->mode);
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return 0;
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}
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return 0;
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}
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static struct ipt_match ttl_match = {
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.name = "ttl",
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.match = match,
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.matchsize = sizeof(struct ipt_ttl_info),
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.me = THIS_MODULE,
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};
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static int __init ipt_ttl_init(void)
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{
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return ipt_register_match(&ttl_match);
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}
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static void __exit ipt_ttl_fini(void)
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{
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ipt_unregister_match(&ttl_match);
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}
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module_init(ipt_ttl_init);
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module_exit(ipt_ttl_fini);
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