mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 02:09:42 +00:00
![Andrew Morton](/assets/img/avatar_default.png)
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>
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/* Hop Limit matching module */
|
|
|
|
/* (C) 2001-2002 Maciej Soltysiak <solt@dns.toxicfilms.tv>
|
|
* Based on HW's ttl module
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
#include <linux/netfilter_ipv6/ip6t_hl.h>
|
|
#include <linux/netfilter_ipv6/ip6_tables.h>
|
|
|
|
MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
|
|
MODULE_DESCRIPTION("IP tables Hop Limit matching module");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int match(const struct sk_buff *skb,
|
|
const struct net_device *in, const struct net_device *out,
|
|
const struct xt_match *match, const void *matchinfo,
|
|
int offset, unsigned int protoff, int *hotdrop)
|
|
{
|
|
const struct ip6t_hl_info *info = matchinfo;
|
|
const struct ipv6hdr *ip6h = skb->nh.ipv6h;
|
|
|
|
switch (info->mode) {
|
|
case IP6T_HL_EQ:
|
|
return (ip6h->hop_limit == info->hop_limit);
|
|
break;
|
|
case IP6T_HL_NE:
|
|
return (!(ip6h->hop_limit == info->hop_limit));
|
|
break;
|
|
case IP6T_HL_LT:
|
|
return (ip6h->hop_limit < info->hop_limit);
|
|
break;
|
|
case IP6T_HL_GT:
|
|
return (ip6h->hop_limit > info->hop_limit);
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING "ip6t_hl: unknown mode %d\n",
|
|
info->mode);
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct ip6t_match hl_match = {
|
|
.name = "hl",
|
|
.match = match,
|
|
.matchsize = sizeof(struct ip6t_hl_info),
|
|
.me = THIS_MODULE,
|
|
};
|
|
|
|
static int __init ip6t_hl_init(void)
|
|
{
|
|
return ip6t_register_match(&hl_match);
|
|
}
|
|
|
|
static void __exit ip6t_hl_fini(void)
|
|
{
|
|
ip6t_unregister_match(&hl_match);
|
|
|
|
}
|
|
|
|
module_init(ip6t_hl_init);
|
|
module_exit(ip6t_hl_fini);
|