nf_log_bridge.c 2.0 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * (C) 2014 by Pablo Neira Ayuso <pablo@netfilter.org>
  4. */
  5. #include <linux/module.h>
  6. #include <linux/spinlock.h>
  7. #include <linux/skbuff.h>
  8. #include <linux/if_bridge.h>
  9. #include <linux/ip.h>
  10. #include <net/route.h>
  11. #include <linux/netfilter.h>
  12. #include <net/netfilter/nf_log.h>
  13. static void nf_log_bridge_packet(struct net *net, u_int8_t pf,
  14. unsigned int hooknum,
  15. const struct sk_buff *skb,
  16. const struct net_device *in,
  17. const struct net_device *out,
  18. const struct nf_loginfo *loginfo,
  19. const char *prefix)
  20. {
  21. nf_log_l2packet(net, pf, eth_hdr(skb)->h_proto, hooknum, skb,
  22. in, out, loginfo, prefix);
  23. }
  24. static struct nf_logger nf_bridge_logger __read_mostly = {
  25. .name = "nf_log_bridge",
  26. .type = NF_LOG_TYPE_LOG,
  27. .logfn = nf_log_bridge_packet,
  28. .me = THIS_MODULE,
  29. };
  30. static int __net_init nf_log_bridge_net_init(struct net *net)
  31. {
  32. return nf_log_set(net, NFPROTO_BRIDGE, &nf_bridge_logger);
  33. }
  34. static void __net_exit nf_log_bridge_net_exit(struct net *net)
  35. {
  36. nf_log_unset(net, &nf_bridge_logger);
  37. }
  38. static struct pernet_operations nf_log_bridge_net_ops = {
  39. .init = nf_log_bridge_net_init,
  40. .exit = nf_log_bridge_net_exit,
  41. };
  42. static int __init nf_log_bridge_init(void)
  43. {
  44. int ret;
  45. /* Request to load the real packet loggers. */
  46. nf_logger_request_module(NFPROTO_IPV4, NF_LOG_TYPE_LOG);
  47. nf_logger_request_module(NFPROTO_IPV6, NF_LOG_TYPE_LOG);
  48. nf_logger_request_module(NFPROTO_ARP, NF_LOG_TYPE_LOG);
  49. ret = register_pernet_subsys(&nf_log_bridge_net_ops);
  50. if (ret < 0)
  51. return ret;
  52. nf_log_register(NFPROTO_BRIDGE, &nf_bridge_logger);
  53. return 0;
  54. }
  55. static void __exit nf_log_bridge_exit(void)
  56. {
  57. unregister_pernet_subsys(&nf_log_bridge_net_ops);
  58. nf_log_unregister(&nf_bridge_logger);
  59. }
  60. module_init(nf_log_bridge_init);
  61. module_exit(nf_log_bridge_exit);
  62. MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
  63. MODULE_DESCRIPTION("Netfilter bridge packet logging");
  64. MODULE_LICENSE("GPL");
  65. MODULE_ALIAS_NF_LOGGER(AF_BRIDGE, 0);