/* Kernel module to match various things tied to sockets associated with
locally generated outgoing packets. */
/* (C) 2000-2001 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/file.h>
#include <linux/rcupdate.h>
#include <net/sock.h>
#include <linux/netfilter_ipv6/ip6t_owner.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
MODULE_DESCRIPTION("IP6 tables owner 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_owner_info *info = matchinfo;
if (!skb->sk || !skb->sk->sk_socket || !skb->sk->sk_socket->file)
return 0;
if (info->match & IP6T_OWNER_UID) {
if ((skb->sk->sk_socket->file->f_uid != info->uid) ^
!!(info->invert & IP6T_OWNER_UID))
}
if (info->match & IP6T_OWNER_GID) {
if ((skb->sk->sk_socket->file->f_gid != info->gid) ^
!!(info->invert & IP6T_OWNER_GID))
return 1;
checkentry(const char *tablename,
const void *ip,
void *matchinfo,
unsigned int hook_mask)
if (info->match & (IP6T_OWNER_PID | IP6T_OWNER_SID)) {
printk("ipt_owner: pid and sid matching "
"not supported anymore\n");
static struct ip6t_match owner_match = {
.name = "owner",
.match = match,
.matchsize = sizeof(struct ip6t_owner_info),
.hooks = (1 << NF_IP6_LOCAL_OUT) | (1 << NF_IP6_POST_ROUTING),
.checkentry = checkentry,
.me = THIS_MODULE,
};
static int __init ip6t_owner_init(void)
return ip6t_register_match(&owner_match);
static void __exit ip6t_owner_fini(void)
ip6t_unregister_match(&owner_match);
module_init(ip6t_owner_init);
module_exit(ip6t_owner_fini);