LXR linux/net/netfilter/nf_log

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * (C) 2016 by Pablo Neira Ayuso <pablo@netfilter.org>
   4 */
   5
   6#include <linux/module.h>
   7#include <linux/spinlock.h>
   8#include <linux/skbuff.h>
   9#include <linux/ip.h>
  10#include <net/route.h>
  11
  12#include <linux/netfilter.h>
  13#include <net/netfilter/nf_log.h>
  14
  15static void nf_log_netdev_packet(struct net *net, u_int8_t pf,
  16                                 unsigned int hooknum,
  17                                 const struct sk_buff *skb,
  18                                 const struct net_device *in,
  19                                 const struct net_device *out,
  20                                 const struct nf_loginfo *loginfo,
  21                                 const char *prefix)
  22{
  23        nf_log_l2packet(net, pf, skb->protocol, hooknum, skb, in, out,
  24                        loginfo, prefix);
  25}
  26
  27static struct nf_logger nf_netdev_logger __read_mostly = {
  28        .name           = "nf_log_netdev",
  29        .type           = NF_LOG_TYPE_LOG,
  30        .logfn          = nf_log_netdev_packet,
  31        .me             = THIS_MODULE,
  32};
  33
  34static int __net_init nf_log_netdev_net_init(struct net *net)
  35{
  36        return nf_log_set(net, NFPROTO_NETDEV, &nf_netdev_logger);
  37}
  38
  39static void __net_exit nf_log_netdev_net_exit(struct net *net)
  40{
  41        nf_log_unset(net, &nf_netdev_logger);
  42}
  43
  44static struct pernet_operations nf_log_netdev_net_ops = {
  45        .init = nf_log_netdev_net_init,
  46        .exit = nf_log_netdev_net_exit,
  47};
  48
  49static int __init nf_log_netdev_init(void)
  50{
  51        int ret;
  52
  53        /* Request to load the real packet loggers. */
  54        nf_logger_request_module(NFPROTO_IPV4, NF_LOG_TYPE_LOG);
  55        nf_logger_request_module(NFPROTO_IPV6, NF_LOG_TYPE_LOG);
  56        nf_logger_request_module(NFPROTO_ARP, NF_LOG_TYPE_LOG);
  57
  58        ret = register_pernet_subsys(&nf_log_netdev_net_ops);
  59        if (ret < 0)
  60                return ret;
  61
  62        nf_log_register(NFPROTO_NETDEV, &nf_netdev_logger);
  63        return 0;
  64}
  65
  66static void __exit nf_log_netdev_exit(void)
  67{
  68        unregister_pernet_subsys(&nf_log_netdev_net_ops);
  69        nf_log_unregister(&nf_netdev_logger);
  70}
  71
  72module_init(nf_log_netdev_init);
  73module_exit(nf_log_netdev_exit);
  74
  75MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
  76MODULE_DESCRIPTION("Netfilter netdev packet logging");
  77MODULE_LICENSE("GPL");
  78MODULE_ALIAS_NF_LOGGER(5, 0); /* NFPROTO_NETDEV */
  79