nf_conntrack_l3proto_generic.c 2.4 KB

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  1. /*
  2. * (C) 2003,2004 USAGI/WIDE Project <http://www.linux-ipv6.org>
  3. *
  4. * Based largely upon the original ip_conntrack code which
  5. * had the following copyright information:
  6. *
  7. * (C) 1999-2001 Paul `Rusty' Russell
  8. * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
  9. *
  10. * This program is free software; you can redistribute it and/or modify
  11. * it under the terms of the GNU General Public License version 2 as
  12. * published by the Free Software Foundation.
  13. *
  14. * Author:
  15. * Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
  16. */
  17. #include <linux/types.h>
  18. #include <linux/ip.h>
  19. #include <linux/netfilter.h>
  20. #include <linux/module.h>
  21. #include <linux/skbuff.h>
  22. #include <linux/icmp.h>
  23. #include <linux/sysctl.h>
  24. #include <net/ip.h>
  25. #include <linux/netfilter_ipv4.h>
  26. #include <net/netfilter/nf_conntrack.h>
  27. #include <net/netfilter/nf_conntrack_l4proto.h>
  28. #include <net/netfilter/nf_conntrack_l3proto.h>
  29. #include <net/netfilter/nf_conntrack_core.h>
  30. #include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
  31. #if 0
  32. #define DEBUGP printk
  33. #else
  34. #define DEBUGP(format, args...)
  35. #endif
  36. static int generic_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
  37. struct nf_conntrack_tuple *tuple)
  38. {
  39. memset(&tuple->src.u3, 0, sizeof(tuple->src.u3));
  40. memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3));
  41. return 1;
  42. }
  43. static int generic_invert_tuple(struct nf_conntrack_tuple *tuple,
  44. const struct nf_conntrack_tuple *orig)
  45. {
  46. memset(&tuple->src.u3, 0, sizeof(tuple->src.u3));
  47. memset(&tuple->dst.u3, 0, sizeof(tuple->dst.u3));
  48. return 1;
  49. }
  50. static int generic_print_tuple(struct seq_file *s,
  51. const struct nf_conntrack_tuple *tuple)
  52. {
  53. return 0;
  54. }
  55. static int generic_print_conntrack(struct seq_file *s,
  56. const struct nf_conn *conntrack)
  57. {
  58. return 0;
  59. }
  60. static int
  61. generic_prepare(struct sk_buff **pskb, unsigned int hooknum,
  62. unsigned int *dataoff, u_int8_t *protonum)
  63. {
  64. /* Never track !!! */
  65. return -NF_ACCEPT;
  66. }
  67. static u_int32_t generic_get_features(const struct nf_conntrack_tuple *tuple)
  68. {
  69. return NF_CT_F_BASIC;
  70. }
  71. struct nf_conntrack_l3proto nf_conntrack_l3proto_generic = {
  72. .l3proto = PF_UNSPEC,
  73. .name = "unknown",
  74. .pkt_to_tuple = generic_pkt_to_tuple,
  75. .invert_tuple = generic_invert_tuple,
  76. .print_tuple = generic_print_tuple,
  77. .print_conntrack = generic_print_conntrack,
  78. .prepare = generic_prepare,
  79. .get_features = generic_get_features,
  80. };
  81. EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_generic);