LXR linux/net/bridge/netfilter/nf_log

   1/*
   2 * (C) 2014 by Pablo Neira Ayuso <pablo@netfilter.org>
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 */
   8
   9#include <linux/module.h>
  10#include <linux/spinlock.h>
  11#include <linux/skbuff.h>
  12#include <linux/if_bridge.h>
  13#include <linux/ip.h>
  14#include <net/route.h>
  15
  16#include <linux/netfilter.h>
  17#include <net/netfilter/nf_log.h>
  18
  19static void nf_log_bridge_packet(struct net *net, u_int8_t pf,
  20                                 unsigned int hooknum,
  21                                 const struct sk_buff *skb,
  22                                 const struct net_device *in,
  23                                 const struct net_device *out,
  24                                 const struct nf_loginfo *loginfo,
  25                                 const char *prefix)
  26{
  27        nf_log_l2packet(net, pf, eth_hdr(skb)->h_proto, hooknum, skb,
  28                        in, out, loginfo, prefix);
  29}
  30
  31static struct nf_logger nf_bridge_logger __read_mostly = {
  32        .name           = "nf_log_bridge",
  33        .type           = NF_LOG_TYPE_LOG,
  34        .logfn          = nf_log_bridge_packet,
  35        .me             = THIS_MODULE,
  36};
  37
  38static int __net_init nf_log_bridge_net_init(struct net *net)
  39{
  40        return nf_log_set(net, NFPROTO_BRIDGE, &nf_bridge_logger);
  41}
  42
  43static void __net_exit nf_log_bridge_net_exit(struct net *net)
  44{
  45        nf_log_unset(net, &nf_bridge_logger);
  46}
  47
  48static struct pernet_operations nf_log_bridge_net_ops = {
  49        .init = nf_log_bridge_net_init,
  50        .exit = nf_log_bridge_net_exit,
  51};
  52
  53static int __init nf_log_bridge_init(void)
  54{
  55        int ret;
  56
  57        /* Request to load the real packet loggers. */
  58        nf_logger_request_module(NFPROTO_IPV4, NF_LOG_TYPE_LOG);
  59        nf_logger_request_module(NFPROTO_IPV6, NF_LOG_TYPE_LOG);
  60        nf_logger_request_module(NFPROTO_ARP, NF_LOG_TYPE_LOG);
  61
  62        ret = register_pernet_subsys(&nf_log_bridge_net_ops);
  63        if (ret < 0)
  64                return ret;
  65
  66        nf_log_register(NFPROTO_BRIDGE, &nf_bridge_logger);
  67        return 0;
  68}
  69
  70static void __exit nf_log_bridge_exit(void)
  71{
  72        unregister_pernet_subsys(&nf_log_bridge_net_ops);
  73        nf_log_unregister(&nf_bridge_logger);
  74}
  75
  76module_init(nf_log_bridge_init);
  77module_exit(nf_log_bridge_exit);
  78
  79MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
  80MODULE_DESCRIPTION("Netfilter bridge packet logging");
  81MODULE_LICENSE("GPL");
  82MODULE_ALIAS_NF_LOGGER(AF_BRIDGE, 0);
  83