LXR linux/net/netfilter/nf_log

   1/*
   2 * (C) 2016 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/ip.h>
  13#include <net/route.h>
  14
  15#include <linux/netfilter.h>
  16#include <net/netfilter/nf_log.h>
  17
  18static void nf_log_netdev_packet(struct net *net, u_int8_t pf,
  19                                 unsigned int hooknum,
  20                                 const struct sk_buff *skb,
  21                                 const struct net_device *in,
  22                                 const struct net_device *out,
  23                                 const struct nf_loginfo *loginfo,
  24                                 const char *prefix)
  25{
  26        nf_log_l2packet(net, pf, skb->protocol, hooknum, skb, in, out,
  27                        loginfo, prefix);
  28}
  29
  30static struct nf_logger nf_netdev_logger __read_mostly = {
  31        .name           = "nf_log_netdev",
  32        .type           = NF_LOG_TYPE_LOG,
  33        .logfn          = nf_log_netdev_packet,
  34        .me             = THIS_MODULE,
  35};
  36
  37static int __net_init nf_log_netdev_net_init(struct net *net)
  38{
  39        return nf_log_set(net, NFPROTO_NETDEV, &nf_netdev_logger);
  40}
  41
  42static void __net_exit nf_log_netdev_net_exit(struct net *net)
  43{
  44        nf_log_unset(net, &nf_netdev_logger);
  45}
  46
  47static struct pernet_operations nf_log_netdev_net_ops = {
  48        .init = nf_log_netdev_net_init,
  49        .exit = nf_log_netdev_net_exit,
  50};
  51
  52static int __init nf_log_netdev_init(void)
  53{
  54        int ret;
  55
  56        /* Request to load the real packet loggers. */
  57        nf_logger_request_module(NFPROTO_IPV4, NF_LOG_TYPE_LOG);
  58        nf_logger_request_module(NFPROTO_IPV6, NF_LOG_TYPE_LOG);
  59        nf_logger_request_module(NFPROTO_ARP, NF_LOG_TYPE_LOG);
  60
  61        ret = register_pernet_subsys(&nf_log_netdev_net_ops);
  62        if (ret < 0)
  63                return ret;
  64
  65        nf_log_register(NFPROTO_NETDEV, &nf_netdev_logger);
  66        return 0;
  67}
  68
  69static void __exit nf_log_netdev_exit(void)
  70{
  71        unregister_pernet_subsys(&nf_log_netdev_net_ops);
  72        nf_log_unregister(&nf_netdev_logger);
  73}
  74
  75module_init(nf_log_netdev_init);
  76module_exit(nf_log_netdev_exit);
  77
  78MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
  79MODULE_DESCRIPTION("Netfilter netdev packet logging");
  80MODULE_LICENSE("GPL");
  81MODULE_ALIAS_NF_LOGGER(5, 0); /* NFPROTO_NETDEV */
  82