1 /* Kernel module to match various things tied to sockets associated with
2 locally generated outgoing packets. */
4 /* (C) 2000-2001 Marc Boucher <marc@mbsi.ca>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/module.h>
12 #include <linux/skbuff.h>
13 #include <linux/file.h>
14 #include <linux/rcupdate.h>
17 #include <linux/netfilter_ipv6/ip6t_owner.h>
18 #include <linux/netfilter_ipv6/ip6_tables.h>
20 MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
21 MODULE_DESCRIPTION("IP6 tables owner matching module");
22 MODULE_LICENSE("GPL");
26 match(const struct sk_buff *skb,
27 const struct net_device *in,
28 const struct net_device *out,
29 const void *matchinfo,
34 const struct ip6t_owner_info *info = matchinfo;
36 if (!skb->sk || !skb->sk->sk_socket || !skb->sk->sk_socket->file)
39 if (info->match & IP6T_OWNER_UID) {
40 if ((skb->sk->sk_socket->file->f_uid != info->uid) ^
41 !!(info->invert & IP6T_OWNER_UID))
45 if (info->match & IP6T_OWNER_GID) {
46 if ((skb->sk->sk_socket->file->f_gid != info->gid) ^
47 !!(info->invert & IP6T_OWNER_GID))
55 checkentry(const char *tablename,
58 unsigned int matchsize,
59 unsigned int hook_mask)
61 const struct ip6t_owner_info *info = matchinfo;
64 & ~((1 << NF_IP6_LOCAL_OUT) | (1 << NF_IP6_POST_ROUTING))) {
65 printk("ip6t_owner: only valid for LOCAL_OUT or POST_ROUTING.\n");
69 if (matchsize != IP6T_ALIGN(sizeof(struct ip6t_owner_info)))
72 if (info->match & (IP6T_OWNER_PID | IP6T_OWNER_SID)) {
73 printk("ipt_owner: pid and sid matching "
74 "not supported anymore\n");
81 static struct ip6t_match owner_match = {
84 .checkentry = &checkentry,
88 static int __init init(void)
90 return ip6t_register_match(&owner_match);
93 static void __exit fini(void)
95 ip6t_unregister_match(&owner_match);