ipv6.h 3.7 KB

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  1. #ifndef _IPV6_H
  2. #define _IPV6_H
  3. #include <linux/libc-compat.h>
  4. #include <linux/types.h>
  5. #include <linux/in6.h>
  6. #include <asm/byteorder.h>
  7. /* The latest drafts declared increase in minimal mtu up to 1280. */
  8. #define IPV6_MIN_MTU 1280
  9. /*
  10. * Advanced API
  11. * source interface/address selection, source routing, etc...
  12. * *under construction*
  13. */
  14. #if __UAPI_DEF_IN6_PKTINFO
  15. struct in6_pktinfo {
  16. struct in6_addr ipi6_addr;
  17. int ipi6_ifindex;
  18. };
  19. #endif
  20. #if __UAPI_DEF_IP6_MTUINFO
  21. struct ip6_mtuinfo {
  22. struct sockaddr_in6 ip6m_addr;
  23. __u32 ip6m_mtu;
  24. };
  25. #endif
  26. struct in6_ifreq {
  27. struct in6_addr ifr6_addr;
  28. __u32 ifr6_prefixlen;
  29. int ifr6_ifindex;
  30. };
  31. #define IPV6_SRCRT_STRICT 0x01 /* Deprecated; will be removed */
  32. #define IPV6_SRCRT_TYPE_0 0 /* Deprecated; will be removed */
  33. #define IPV6_SRCRT_TYPE_2 2 /* IPv6 type 2 Routing Header */
  34. #define IPV6_SRCRT_TYPE_4 4 /* Segment Routing with IPv6 */
  35. /*
  36. * routing header
  37. */
  38. struct ipv6_rt_hdr {
  39. __u8 nexthdr;
  40. __u8 hdrlen;
  41. __u8 type;
  42. __u8 segments_left;
  43. /*
  44. * type specific data
  45. * variable length field
  46. */
  47. };
  48. struct ipv6_opt_hdr {
  49. __u8 nexthdr;
  50. __u8 hdrlen;
  51. /*
  52. * TLV encoded option data follows.
  53. */
  54. } __attribute__((packed)); /* required for some archs */
  55. #define ipv6_destopt_hdr ipv6_opt_hdr
  56. #define ipv6_hopopt_hdr ipv6_opt_hdr
  57. /* Router Alert option values (RFC2711) */
  58. #define IPV6_OPT_ROUTERALERT_MLD 0x0000 /* MLD(RFC2710) */
  59. /*
  60. * routing header type 0 (used in cmsghdr struct)
  61. */
  62. struct rt0_hdr {
  63. struct ipv6_rt_hdr rt_hdr;
  64. __u32 reserved;
  65. struct in6_addr addr[0];
  66. #define rt0_type rt_hdr.type
  67. };
  68. /*
  69. * routing header type 2
  70. */
  71. struct rt2_hdr {
  72. struct ipv6_rt_hdr rt_hdr;
  73. __u32 reserved;
  74. struct in6_addr addr;
  75. #define rt2_type rt_hdr.type
  76. };
  77. /*
  78. * home address option in destination options header
  79. */
  80. struct ipv6_destopt_hao {
  81. __u8 type;
  82. __u8 length;
  83. struct in6_addr addr;
  84. } __attribute__((packed));
  85. /*
  86. * IPv6 fixed header
  87. *
  88. * BEWARE, it is incorrect. The first 4 bits of flow_lbl
  89. * are glued to priority now, forming "class".
  90. */
  91. struct ipv6hdr {
  92. #if defined(__LITTLE_ENDIAN_BITFIELD)
  93. __u8 priority:4,
  94. version:4;
  95. #elif defined(__BIG_ENDIAN_BITFIELD)
  96. __u8 version:4,
  97. priority:4;
  98. #else
  99. #error "Please fix <asm/byteorder.h>"
  100. #endif
  101. __u8 flow_lbl[3];
  102. __be16 payload_len;
  103. __u8 nexthdr;
  104. __u8 hop_limit;
  105. struct in6_addr saddr;
  106. struct in6_addr daddr;
  107. };
  108. /* index values for the variables in ipv6_devconf */
  109. enum {
  110. DEVCONF_FORWARDING = 0,
  111. DEVCONF_HOPLIMIT,
  112. DEVCONF_MTU6,
  113. DEVCONF_ACCEPT_RA,
  114. DEVCONF_ACCEPT_REDIRECTS,
  115. DEVCONF_AUTOCONF,
  116. DEVCONF_DAD_TRANSMITS,
  117. DEVCONF_RTR_SOLICITS,
  118. DEVCONF_RTR_SOLICIT_INTERVAL,
  119. DEVCONF_RTR_SOLICIT_DELAY,
  120. DEVCONF_USE_TEMPADDR,
  121. DEVCONF_TEMP_VALID_LFT,
  122. DEVCONF_TEMP_PREFERED_LFT,
  123. DEVCONF_REGEN_MAX_RETRY,
  124. DEVCONF_MAX_DESYNC_FACTOR,
  125. DEVCONF_MAX_ADDRESSES,
  126. DEVCONF_FORCE_MLD_VERSION,
  127. DEVCONF_ACCEPT_RA_DEFRTR,
  128. DEVCONF_ACCEPT_RA_PINFO,
  129. DEVCONF_ACCEPT_RA_RTR_PREF,
  130. DEVCONF_RTR_PROBE_INTERVAL,
  131. DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
  132. DEVCONF_PROXY_NDP,
  133. DEVCONF_OPTIMISTIC_DAD,
  134. DEVCONF_ACCEPT_SOURCE_ROUTE,
  135. DEVCONF_MC_FORWARDING,
  136. DEVCONF_DISABLE_IPV6,
  137. DEVCONF_ACCEPT_DAD,
  138. DEVCONF_FORCE_TLLAO,
  139. DEVCONF_NDISC_NOTIFY,
  140. DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
  141. DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
  142. DEVCONF_SUPPRESS_FRAG_NDISC,
  143. DEVCONF_ACCEPT_RA_FROM_LOCAL,
  144. DEVCONF_USE_OPTIMISTIC,
  145. DEVCONF_ACCEPT_RA_MTU,
  146. DEVCONF_STABLE_SECRET,
  147. DEVCONF_USE_OIF_ADDRS_ONLY,
  148. DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
  149. DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
  150. DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
  151. DEVCONF_DROP_UNSOLICITED_NA,
  152. DEVCONF_KEEP_ADDR_ON_DOWN,
  153. DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
  154. DEVCONF_SEG6_ENABLED,
  155. DEVCONF_SEG6_REQUIRE_HMAC,
  156. DEVCONF_ENHANCED_DAD,
  157. DEVCONF_MAX
  158. };
  159. #endif /* _IPV6_H */