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 struct xt_match
*match
,
30 const void *matchinfo
,
35 const struct ip6t_owner_info
*info
= matchinfo
;
37 if (!skb
->sk
|| !skb
->sk
->sk_socket
|| !skb
->sk
->sk_socket
->file
)
40 if (info
->match
& IP6T_OWNER_UID
) {
41 if ((skb
->sk
->sk_socket
->file
->f_uid
!= info
->uid
) ^
42 !!(info
->invert
& IP6T_OWNER_UID
))
46 if (info
->match
& IP6T_OWNER_GID
) {
47 if ((skb
->sk
->sk_socket
->file
->f_gid
!= info
->gid
) ^
48 !!(info
->invert
& IP6T_OWNER_GID
))
56 checkentry(const char *tablename
,
58 const struct xt_match
*match
,
60 unsigned int hook_mask
)
62 const struct ip6t_owner_info
*info
= matchinfo
;
64 if (info
->match
& (IP6T_OWNER_PID
| IP6T_OWNER_SID
)) {
65 printk("ipt_owner: pid and sid matching "
66 "not supported anymore\n");
72 static struct ip6t_match owner_match
= {
75 .matchsize
= sizeof(struct ip6t_owner_info
),
76 .hooks
= (1 << NF_IP6_LOCAL_OUT
) | (1 << NF_IP6_POST_ROUTING
),
77 .checkentry
= checkentry
,
81 static int __init
ip6t_owner_init(void)
83 return ip6t_register_match(&owner_match
);
86 static void __exit
ip6t_owner_fini(void)
88 ip6t_unregister_match(&owner_match
);
91 module_init(ip6t_owner_init
);
92 module_exit(ip6t_owner_fini
);