diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/ipv6/netfilter/ip6t_hl.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'net/ipv6/netfilter/ip6t_hl.c')
-rw-r--r-- | net/ipv6/netfilter/ip6t_hl.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/net/ipv6/netfilter/ip6t_hl.c b/net/ipv6/netfilter/ip6t_hl.c new file mode 100644 index 00000000000..0beaff5471d --- /dev/null +++ b/net/ipv6/netfilter/ip6t_hl.c @@ -0,0 +1,80 @@ +/* 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 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 int checkentry(const char *tablename, const struct ip6t_ip6 *ip, + void *matchinfo, unsigned int matchsize, + unsigned int hook_mask) +{ + if (matchsize != IP6T_ALIGN(sizeof(struct ip6t_hl_info))) + return 0; + + return 1; +} + +static struct ip6t_match hl_match = { + .name = "hl", + .match = &match, + .checkentry = &checkentry, + .me = THIS_MODULE, +}; + +static int __init init(void) +{ + return ip6t_register_match(&hl_match); +} + +static void __exit fini(void) +{ + ip6t_unregister_match(&hl_match); + +} + +module_init(init); +module_exit(fini); |