mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
![Eric Dumazet](/assets/img/avatar_default.png)
Define three accessors to get/set dst attached to a skb struct dst_entry *skb_dst(const struct sk_buff *skb) void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst) void skb_dst_drop(struct sk_buff *skb) This one should replace occurrences of : dst_release(skb->dst) skb->dst = NULL; Delete skb->dst field Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/* IP tables module for matching the routing realm
|
|
*
|
|
* (C) 2003 by Sampsa Ranta <sampsa@netsonic.fi>
|
|
*
|
|
* 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/netdevice.h>
|
|
#include <net/route.h>
|
|
|
|
#include <linux/netfilter_ipv4.h>
|
|
#include <linux/netfilter/xt_realm.h>
|
|
#include <linux/netfilter/x_tables.h>
|
|
|
|
MODULE_AUTHOR("Sampsa Ranta <sampsa@netsonic.fi>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Xtables: Routing realm match");
|
|
MODULE_ALIAS("ipt_realm");
|
|
|
|
static bool
|
|
realm_mt(const struct sk_buff *skb, const struct xt_match_param *par)
|
|
{
|
|
const struct xt_realm_info *info = par->matchinfo;
|
|
const struct dst_entry *dst = skb_dst(skb);
|
|
|
|
return (info->id == (dst->tclassid & info->mask)) ^ info->invert;
|
|
}
|
|
|
|
static struct xt_match realm_mt_reg __read_mostly = {
|
|
.name = "realm",
|
|
.match = realm_mt,
|
|
.matchsize = sizeof(struct xt_realm_info),
|
|
.hooks = (1 << NF_INET_POST_ROUTING) | (1 << NF_INET_FORWARD) |
|
|
(1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_LOCAL_IN),
|
|
.family = NFPROTO_UNSPEC,
|
|
.me = THIS_MODULE
|
|
};
|
|
|
|
static int __init realm_mt_init(void)
|
|
{
|
|
return xt_register_match(&realm_mt_reg);
|
|
}
|
|
|
|
static void __exit realm_mt_exit(void)
|
|
{
|
|
xt_unregister_match(&realm_mt_reg);
|
|
}
|
|
|
|
module_init(realm_mt_init);
|
|
module_exit(realm_mt_exit);
|