blob: 5d9953a90929199aad6eaa7a2cf44ed6b3cd8f60 [file] [log] [blame]
/*
* (C) 2014 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* 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/spinlock.h>
#include <linux/skbuff.h>
#include <linux/if_bridge.h>
#include <linux/ip.h>
#include <net/route.h>
#include <linux/netfilter.h>
#include <net/netfilter/nf_log.h>
static void nf_log_bridge_packet(struct net *net, u_int8_t pf,
unsigned int hooknum,
const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
const struct nf_loginfo *loginfo,
const char *prefix)
{
switch (eth_hdr(skb)->h_proto) {
case htons(ETH_P_IP):
nf_log_packet(net, NFPROTO_IPV4, hooknum, skb, in, out,
loginfo, "%s", prefix);
break;
case htons(ETH_P_IPV6):
nf_log_packet(net, NFPROTO_IPV6, hooknum, skb, in, out,
loginfo, "%s", prefix);
break;
case htons(ETH_P_ARP):
case htons(ETH_P_RARP):
nf_log_packet(net, NFPROTO_ARP, hooknum, skb, in, out,
loginfo, "%s", prefix);
break;
}
}
static struct nf_logger nf_bridge_logger __read_mostly = {
.name = "nf_log_bridge",
.type = NF_LOG_TYPE_LOG,
.logfn = nf_log_bridge_packet,
.me = THIS_MODULE,
};
static int __net_init nf_log_bridge_net_init(struct net *net)
{
nf_log_set(net, NFPROTO_BRIDGE, &nf_bridge_logger);
return 0;
}
static void __net_exit nf_log_bridge_net_exit(struct net *net)
{
nf_log_unset(net, &nf_bridge_logger);
}
static struct pernet_operations nf_log_bridge_net_ops = {
.init = nf_log_bridge_net_init,
.exit = nf_log_bridge_net_exit,
};
static int __init nf_log_bridge_init(void)
{
int ret;
/* Request to load the real packet loggers. */
nf_logger_request_module(NFPROTO_IPV4, NF_LOG_TYPE_LOG);
nf_logger_request_module(NFPROTO_IPV6, NF_LOG_TYPE_LOG);
nf_logger_request_module(NFPROTO_ARP, NF_LOG_TYPE_LOG);
ret = register_pernet_subsys(&nf_log_bridge_net_ops);
if (ret < 0)
return ret;
nf_log_register(NFPROTO_BRIDGE, &nf_bridge_logger);
return 0;
}
static void __exit nf_log_bridge_exit(void)
{
unregister_pernet_subsys(&nf_log_bridge_net_ops);
nf_log_unregister(&nf_bridge_logger);
}
module_init(nf_log_bridge_init);
module_exit(nf_log_bridge_exit);
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
MODULE_DESCRIPTION("Netfilter bridge packet logging");
MODULE_LICENSE("GPL");
MODULE_ALIAS_NF_LOGGER(AF_BRIDGE, 0);