| /* This is a module which is used for setting the NFMARK field of an skb. */ |
| |
| /* (C) 1999-2001 Marc Boucher <marc@mbsi.ca> |
| * |
| * 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/ip.h> |
| #include <net/checksum.h> |
| |
| #include <linux/netfilter_ipv6/ip6_tables.h> |
| #include <linux/netfilter_ipv6/ip6t_MARK.h> |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>"); |
| |
| static unsigned int |
| target(struct sk_buff **pskb, |
| const struct net_device *in, |
| const struct net_device *out, |
| unsigned int hooknum, |
| const void *targinfo, |
| void *userinfo) |
| { |
| const struct ip6t_mark_target_info *markinfo = targinfo; |
| |
| if((*pskb)->nfmark != markinfo->mark) { |
| (*pskb)->nfmark = markinfo->mark; |
| (*pskb)->nfcache |= NFC_ALTERED; |
| } |
| return IP6T_CONTINUE; |
| } |
| |
| static int |
| checkentry(const char *tablename, |
| const struct ip6t_entry *e, |
| void *targinfo, |
| unsigned int targinfosize, |
| unsigned int hook_mask) |
| { |
| if (targinfosize != IP6T_ALIGN(sizeof(struct ip6t_mark_target_info))) { |
| printk(KERN_WARNING "MARK: targinfosize %u != %Zu\n", |
| targinfosize, |
| IP6T_ALIGN(sizeof(struct ip6t_mark_target_info))); |
| return 0; |
| } |
| |
| if (strcmp(tablename, "mangle") != 0) { |
| printk(KERN_WARNING "MARK: can only be called from \"mangle\" table, not \"%s\"\n", tablename); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static struct ip6t_target ip6t_mark_reg |
| = { { NULL, NULL }, "MARK", target, checkentry, NULL, THIS_MODULE }; |
| |
| static int __init init(void) |
| { |
| printk(KERN_DEBUG "registering ipv6 mark target\n"); |
| if (ip6t_register_target(&ip6t_mark_reg)) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static void __exit fini(void) |
| { |
| ip6t_unregister_target(&ip6t_mark_reg); |
| } |
| |
| module_init(init); |
| module_exit(fini); |