in6.h 7.1 KB

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  1. /*
  2. * Types and definitions for AF_INET6
  3. * Linux INET6 implementation
  4. *
  5. * Authors:
  6. * Pedro Roque <roque@di.fc.ul.pt>
  7. *
  8. * Sources:
  9. * IPv6 Program Interfaces for BSD Systems
  10. * <draft-ietf-ipngwg-bsd-api-05.txt>
  11. *
  12. * Advanced Sockets API for IPv6
  13. * <draft-stevens-advanced-api-00.txt>
  14. *
  15. * This program is free software; you can redistribute it and/or
  16. * modify it under the terms of the GNU General Public License
  17. * as published by the Free Software Foundation; either version
  18. * 2 of the License, or (at your option) any later version.
  19. */
  20. #ifndef _LINUX_IN6_H
  21. #define _LINUX_IN6_H
  22. #include <linux/types.h>
  23. #include <linux/libc-compat.h>
  24. /*
  25. * IPv6 address structure
  26. */
  27. #if __UAPI_DEF_IN6_ADDR
  28. struct in6_addr {
  29. union {
  30. __u8 u6_addr8[16];
  31. #if __UAPI_DEF_IN6_ADDR_ALT
  32. __be16 u6_addr16[8];
  33. __be32 u6_addr32[4];
  34. #endif
  35. } in6_u;
  36. #define s6_addr in6_u.u6_addr8
  37. #if __UAPI_DEF_IN6_ADDR_ALT
  38. #define s6_addr16 in6_u.u6_addr16
  39. #define s6_addr32 in6_u.u6_addr32
  40. #endif
  41. };
  42. #endif /* __UAPI_DEF_IN6_ADDR */
  43. #if __UAPI_DEF_SOCKADDR_IN6
  44. struct sockaddr_in6 {
  45. unsigned short int sin6_family; /* AF_INET6 */
  46. __be16 sin6_port; /* Transport layer port # */
  47. __be32 sin6_flowinfo; /* IPv6 flow information */
  48. struct in6_addr sin6_addr; /* IPv6 address */
  49. __u32 sin6_scope_id; /* scope id (new in RFC2553) */
  50. };
  51. #endif /* __UAPI_DEF_SOCKADDR_IN6 */
  52. #if __UAPI_DEF_IPV6_MREQ
  53. struct ipv6_mreq {
  54. /* IPv6 multicast address of group */
  55. struct in6_addr ipv6mr_multiaddr;
  56. /* local IPv6 address of interface */
  57. int ipv6mr_ifindex;
  58. };
  59. #endif /* __UAPI_DEF_IVP6_MREQ */
  60. #define ipv6mr_acaddr ipv6mr_multiaddr
  61. struct in6_flowlabel_req {
  62. struct in6_addr flr_dst;
  63. __be32 flr_label;
  64. __u8 flr_action;
  65. __u8 flr_share;
  66. __u16 flr_flags;
  67. __u16 flr_expires;
  68. __u16 flr_linger;
  69. __u32 __flr_pad;
  70. /* Options in format of IPV6_PKTOPTIONS */
  71. };
  72. #define IPV6_FL_A_GET 0
  73. #define IPV6_FL_A_PUT 1
  74. #define IPV6_FL_A_RENEW 2
  75. #define IPV6_FL_F_CREATE 1
  76. #define IPV6_FL_F_EXCL 2
  77. #define IPV6_FL_F_REFLECT 4
  78. #define IPV6_FL_F_REMOTE 8
  79. #define IPV6_FL_S_NONE 0
  80. #define IPV6_FL_S_EXCL 1
  81. #define IPV6_FL_S_PROCESS 2
  82. #define IPV6_FL_S_USER 3
  83. #define IPV6_FL_S_ANY 255
  84. /*
  85. * Bitmask constant declarations to help applications select out the
  86. * flow label and priority fields.
  87. *
  88. * Note that this are in host byte order while the flowinfo field of
  89. * sockaddr_in6 is in network byte order.
  90. */
  91. #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff
  92. #define IPV6_FLOWINFO_PRIORITY 0x0ff00000
  93. /* These definitions are obsolete */
  94. #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
  95. #define IPV6_PRIORITY_FILLER 0x0100
  96. #define IPV6_PRIORITY_UNATTENDED 0x0200
  97. #define IPV6_PRIORITY_RESERVED1 0x0300
  98. #define IPV6_PRIORITY_BULK 0x0400
  99. #define IPV6_PRIORITY_RESERVED2 0x0500
  100. #define IPV6_PRIORITY_INTERACTIVE 0x0600
  101. #define IPV6_PRIORITY_CONTROL 0x0700
  102. #define IPV6_PRIORITY_8 0x0800
  103. #define IPV6_PRIORITY_9 0x0900
  104. #define IPV6_PRIORITY_10 0x0a00
  105. #define IPV6_PRIORITY_11 0x0b00
  106. #define IPV6_PRIORITY_12 0x0c00
  107. #define IPV6_PRIORITY_13 0x0d00
  108. #define IPV6_PRIORITY_14 0x0e00
  109. #define IPV6_PRIORITY_15 0x0f00
  110. /*
  111. * IPV6 extension headers
  112. */
  113. #if __UAPI_DEF_IPPROTO_V6
  114. #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */
  115. #define IPPROTO_ROUTING 43 /* IPv6 routing header */
  116. #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */
  117. #define IPPROTO_ICMPV6 58 /* ICMPv6 */
  118. #define IPPROTO_NONE 59 /* IPv6 no next header */
  119. #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */
  120. #define IPPROTO_MH 135 /* IPv6 mobility header */
  121. #endif /* __UAPI_DEF_IPPROTO_V6 */
  122. /*
  123. * IPv6 TLV options.
  124. */
  125. #define IPV6_TLV_PAD1 0
  126. #define IPV6_TLV_PADN 1
  127. #define IPV6_TLV_ROUTERALERT 5
  128. #define IPV6_TLV_JUMBO 194
  129. #define IPV6_TLV_HAO 201 /* home address option */
  130. /*
  131. * IPV6 socket options
  132. */
  133. #if __UAPI_DEF_IPV6_OPTIONS
  134. #define IPV6_ADDRFORM 1
  135. #define IPV6_2292PKTINFO 2
  136. #define IPV6_2292HOPOPTS 3
  137. #define IPV6_2292DSTOPTS 4
  138. #define IPV6_2292RTHDR 5
  139. #define IPV6_2292PKTOPTIONS 6
  140. #define IPV6_CHECKSUM 7
  141. #define IPV6_2292HOPLIMIT 8
  142. #define IPV6_NEXTHOP 9
  143. #define IPV6_AUTHHDR 10 /* obsolete */
  144. #define IPV6_FLOWINFO 11
  145. #define IPV6_UNICAST_HOPS 16
  146. #define IPV6_MULTICAST_IF 17
  147. #define IPV6_MULTICAST_HOPS 18
  148. #define IPV6_MULTICAST_LOOP 19
  149. #define IPV6_ADD_MEMBERSHIP 20
  150. #define IPV6_DROP_MEMBERSHIP 21
  151. #define IPV6_ROUTER_ALERT 22
  152. #define IPV6_MTU_DISCOVER 23
  153. #define IPV6_MTU 24
  154. #define IPV6_RECVERR 25
  155. #define IPV6_V6ONLY 26
  156. #define IPV6_JOIN_ANYCAST 27
  157. #define IPV6_LEAVE_ANYCAST 28
  158. /* IPV6_MTU_DISCOVER values */
  159. #define IPV6_PMTUDISC_DONT 0
  160. #define IPV6_PMTUDISC_WANT 1
  161. #define IPV6_PMTUDISC_DO 2
  162. #define IPV6_PMTUDISC_PROBE 3
  163. /* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4
  164. * also see comments on IP_PMTUDISC_INTERFACE
  165. */
  166. #define IPV6_PMTUDISC_INTERFACE 4
  167. /* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to
  168. * get fragmented if they exceed the interface mtu
  169. */
  170. #define IPV6_PMTUDISC_OMIT 5
  171. /* Flowlabel */
  172. #define IPV6_FLOWLABEL_MGR 32
  173. #define IPV6_FLOWINFO_SEND 33
  174. #define IPV6_IPSEC_POLICY 34
  175. #define IPV6_XFRM_POLICY 35
  176. #endif
  177. /*
  178. * Multicast:
  179. * Following socket options are shared between IPv4 and IPv6.
  180. *
  181. * MCAST_JOIN_GROUP 42
  182. * MCAST_BLOCK_SOURCE 43
  183. * MCAST_UNBLOCK_SOURCE 44
  184. * MCAST_LEAVE_GROUP 45
  185. * MCAST_JOIN_SOURCE_GROUP 46
  186. * MCAST_LEAVE_SOURCE_GROUP 47
  187. * MCAST_MSFILTER 48
  188. */
  189. /*
  190. * Advanced API (RFC3542) (1)
  191. *
  192. * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
  193. */
  194. #define IPV6_RECVPKTINFO 49
  195. #define IPV6_PKTINFO 50
  196. #define IPV6_RECVHOPLIMIT 51
  197. #define IPV6_HOPLIMIT 52
  198. #define IPV6_RECVHOPOPTS 53
  199. #define IPV6_HOPOPTS 54
  200. #define IPV6_RTHDRDSTOPTS 55
  201. #define IPV6_RECVRTHDR 56
  202. #define IPV6_RTHDR 57
  203. #define IPV6_RECVDSTOPTS 58
  204. #define IPV6_DSTOPTS 59
  205. #define IPV6_RECVPATHMTU 60
  206. #define IPV6_PATHMTU 61
  207. #define IPV6_DONTFRAG 62
  208. #if 0 /* not yet */
  209. #define IPV6_USE_MIN_MTU 63
  210. #endif
  211. /*
  212. * Netfilter (1)
  213. *
  214. * Following socket options are used in ip6_tables;
  215. * see include/linux/netfilter_ipv6/ip6_tables.h.
  216. *
  217. * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64
  218. * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65
  219. */
  220. /*
  221. * Advanced API (RFC3542) (2)
  222. */
  223. #define IPV6_RECVTCLASS 66
  224. #define IPV6_TCLASS 67
  225. /*
  226. * Netfilter (2)
  227. *
  228. * Following socket options are used in ip6_tables;
  229. * see include/linux/netfilter_ipv6/ip6_tables.h.
  230. *
  231. * IP6T_SO_GET_REVISION_MATCH 68
  232. * IP6T_SO_GET_REVISION_TARGET 69
  233. * IP6T_SO_ORIGINAL_DST 80
  234. */
  235. #define IPV6_AUTOFLOWLABEL 70
  236. /* RFC5014: Source address selection */
  237. #define IPV6_ADDR_PREFERENCES 72
  238. #define IPV6_PREFER_SRC_TMP 0x0001
  239. #define IPV6_PREFER_SRC_PUBLIC 0x0002
  240. #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100
  241. #define IPV6_PREFER_SRC_COA 0x0004
  242. #define IPV6_PREFER_SRC_HOME 0x0400
  243. #define IPV6_PREFER_SRC_CGA 0x0008
  244. #define IPV6_PREFER_SRC_NONCGA 0x0800
  245. /* RFC5082: Generalized Ttl Security Mechanism */
  246. #define IPV6_MINHOPCOUNT 73
  247. #define IPV6_ORIGDSTADDR 74
  248. #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR
  249. #define IPV6_TRANSPARENT 75
  250. #define IPV6_UNICAST_IF 76
  251. /*
  252. * Multicast Routing:
  253. * see include/uapi/linux/mroute6.h.
  254. *
  255. * MRT6_BASE 200
  256. * ...
  257. * MRT6_MAX
  258. */
  259. #endif /* _LINUX_IN6_H */