Category

Development Platform
Home > SourceCode/Document > Linux-Unix program > View Code
flow.h
Package: linux-2.4.20.tar.gz　[view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 2k
Category:

Linux-Unix program

Development Platform:

Unix_Linux

flow.h：Code Content
  1. /*
  2.  *
  3.  * Flow based forwarding rules (usage: firewalling, etc)
  4.  *
  5.  */
  7. #ifndef _NET_FLOW_H
  8. #define _NET_FLOW_H
  10. struct flowi {
  11. int proto; /* {TCP, UDP, ICMP} */
  13. union {
  14. struct {
  15. __u32 daddr;
  16. __u32 saddr;
  17. } ip4_u;
  19. struct {
  20. struct in6_addr * daddr;
  21. struct in6_addr * saddr;
  22. __u32 flowlabel;
  23. } ip6_u;
  24. } nl_u;
  25. #define fl6_dst nl_u.ip6_u.daddr
  26. #define fl6_src nl_u.ip6_u.saddr
  27. #define fl6_flowlabel nl_u.ip6_u.flowlabel
  28. #define fl4_dst nl_u.ip4_u.daddr
  29. #define fl4_src nl_u.ip4_u.saddr
  31. int oif;
  33. union {
  34. struct {
  35. __u16 sport;
  36. __u16 dport;
  37. } ports;
  39. struct {
  40. __u8 type;
  41. __u8 code;
  42. } icmpt;
  44. unsigned long data;
  45. } uli_u;
  46. };
  48. #define FLOWR_NODECISION 0 /* rule not appliable to flow */
  49. #define FLOWR_SELECT 1 /* flow must follow this rule */
  50. #define FLOWR_CLEAR 2 /* priority level clears flow */
  51. #define FLOWR_ERROR 3
  53. struct fl_acc_args {
  54. int type;
  57. #define FL_ARG_FORWARD 1
  58. #define FL_ARG_ORIGIN 2
  60. union {
  61. struct sk_buff *skb;
  62. struct {
  63. struct sock *sk;
  64. struct flowi *flow;
  65. } fl_o;
  66. } fl_u;
  67. };
  70. struct pkt_filter {
  71. atomic_t refcnt;
  72. unsigned int offset;
  73. __u32 value;
  74. __u32 mask;
  75. struct pkt_filter *next;
  76. };
  78. #define FLR_INPUT 1
  79. #define FLR_OUTPUT 2
  81. struct flow_filter {
  82. int type;
  83. union {
  84. struct pkt_filter *filter;
  85. struct sock *sk;
  86. } u;
  87. };
  89. struct flow_rule {
  90. struct flow_rule_ops *ops;
  91. unsigned char private[0];
  92. };
  94. struct flow_rule_ops {
  95. int (*accept)(struct rt6_info *rt,
  96.   struct rt6_info *rule,
  97.   struct fl_acc_args *args,
  98.   struct rt6_info **nrt);
  99. };
  101. #endif