![Jiri Pirko](/assets/img/avatar_default.png)
Register net_bridge_port pointer as rx_handler data pointer. As br_port is removed from struct net_device, another netdev priv_flag is added to indicate the device serves as a bridge port. Also rcuized pointers are now correctly dereferenced in br_fdb.c and in netfilter parts. Signed-off-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
81 lines
2 KiB
C
81 lines
2 KiB
C
/*
|
|
* ebt_redirect
|
|
*
|
|
* Authors:
|
|
* Bart De Schuymer <bdschuym@pandora.be>
|
|
*
|
|
* April, 2002
|
|
*
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <net/sock.h>
|
|
#include "../br_private.h"
|
|
#include <linux/netfilter.h>
|
|
#include <linux/netfilter/x_tables.h>
|
|
#include <linux/netfilter_bridge/ebtables.h>
|
|
#include <linux/netfilter_bridge/ebt_redirect.h>
|
|
|
|
static unsigned int
|
|
ebt_redirect_tg(struct sk_buff *skb, const struct xt_action_param *par)
|
|
{
|
|
const struct ebt_redirect_info *info = par->targinfo;
|
|
|
|
if (!skb_make_writable(skb, 0))
|
|
return EBT_DROP;
|
|
|
|
if (par->hooknum != NF_BR_BROUTING)
|
|
/* rcu_read_lock()ed by nf_hook_slow */
|
|
memcpy(eth_hdr(skb)->h_dest,
|
|
br_port_get_rcu(par->in)->br->dev->dev_addr, ETH_ALEN);
|
|
else
|
|
memcpy(eth_hdr(skb)->h_dest, par->in->dev_addr, ETH_ALEN);
|
|
skb->pkt_type = PACKET_HOST;
|
|
return info->target;
|
|
}
|
|
|
|
static int ebt_redirect_tg_check(const struct xt_tgchk_param *par)
|
|
{
|
|
const struct ebt_redirect_info *info = par->targinfo;
|
|
unsigned int hook_mask;
|
|
|
|
if (BASE_CHAIN && info->target == EBT_RETURN)
|
|
return -EINVAL;
|
|
|
|
hook_mask = par->hook_mask & ~(1 << NF_BR_NUMHOOKS);
|
|
if ((strcmp(par->table, "nat") != 0 ||
|
|
hook_mask & ~(1 << NF_BR_PRE_ROUTING)) &&
|
|
(strcmp(par->table, "broute") != 0 ||
|
|
hook_mask & ~(1 << NF_BR_BROUTING)))
|
|
return -EINVAL;
|
|
if (INVALID_TARGET)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static struct xt_target ebt_redirect_tg_reg __read_mostly = {
|
|
.name = "redirect",
|
|
.revision = 0,
|
|
.family = NFPROTO_BRIDGE,
|
|
.hooks = (1 << NF_BR_NUMHOOKS) | (1 << NF_BR_PRE_ROUTING) |
|
|
(1 << NF_BR_BROUTING),
|
|
.target = ebt_redirect_tg,
|
|
.checkentry = ebt_redirect_tg_check,
|
|
.targetsize = sizeof(struct ebt_redirect_info),
|
|
.me = THIS_MODULE,
|
|
};
|
|
|
|
static int __init ebt_redirect_init(void)
|
|
{
|
|
return xt_register_target(&ebt_redirect_tg_reg);
|
|
}
|
|
|
|
static void __exit ebt_redirect_fini(void)
|
|
{
|
|
xt_unregister_target(&ebt_redirect_tg_reg);
|
|
}
|
|
|
|
module_init(ebt_redirect_init);
|
|
module_exit(ebt_redirect_fini);
|
|
MODULE_DESCRIPTION("Ebtables: Packet redirection to localhost");
|
|
MODULE_LICENSE("GPL");
|