1 /* 2 * Types and definitions for AF_INET6 3 * Linux INET6 implementation 4 * 5 * Authors: 6 * Pedro Roque <roque (at) 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 21 #ifndef _LINUX_IN6_H 22 #define _LINUX_IN6_H 23 24 #include <linux/types.h> 25 26 /* 27 * IPv6 address structure 28 */ 29 30 struct in6_addr { 31 union { 32 __u8 u6_addr8[16]; 33 __be16 u6_addr16[8]; 34 __be32 u6_addr32[4]; 35 } in6_u; 36 #define s6_addr in6_u.u6_addr8 37 #define s6_addr16 in6_u.u6_addr16 38 #define s6_addr32 in6_u.u6_addr32 39 }; 40 41 /* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553 42 * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined 43 * in network byte order, not in host byte order as are the IPv4 equivalents 44 */ 45 46 struct sockaddr_in6 { 47 unsigned short int sin6_family; /* AF_INET6 */ 48 __be16 sin6_port; /* Transport layer port # */ 49 __be32 sin6_flowinfo; /* IPv6 flow information */ 50 struct in6_addr sin6_addr; /* IPv6 address */ 51 __u32 sin6_scope_id; /* scope id (new in RFC2553) */ 52 }; 53 54 struct ipv6_mreq { 55 /* IPv6 multicast address of group */ 56 struct in6_addr ipv6mr_multiaddr; 57 58 /* local IPv6 address of interface */ 59 int ipv6mr_ifindex; 60 }; 61 62 #define ipv6mr_acaddr ipv6mr_multiaddr 63 64 struct in6_flowlabel_req { 65 struct in6_addr flr_dst; 66 __be32 flr_label; 67 __u8 flr_action; 68 __u8 flr_share; 69 __u16 flr_flags; 70 __u16 flr_expires; 71 __u16 flr_linger; 72 __u32 __flr_pad; 73 /* Options in format of IPV6_PKTOPTIONS */ 74 }; 75 76 #define IPV6_FL_A_GET 0 77 #define IPV6_FL_A_PUT 1 78 #define IPV6_FL_A_RENEW 2 79 80 #define IPV6_FL_F_CREATE 1 81 #define IPV6_FL_F_EXCL 2 82 83 #define IPV6_FL_S_NONE 0 84 #define IPV6_FL_S_EXCL 1 85 #define IPV6_FL_S_PROCESS 2 86 #define IPV6_FL_S_USER 3 87 #define IPV6_FL_S_ANY 255 88 89 90 /* 91 * Bitmask constant declarations to help applications select out the 92 * flow label and priority fields. 93 * 94 * Note that this are in host byte order while the flowinfo field of 95 * sockaddr_in6 is in network byte order. 96 */ 97 98 #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff 99 #define IPV6_FLOWINFO_PRIORITY 0x0ff00000 100 101 /* These definitions are obsolete */ 102 #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000 103 #define IPV6_PRIORITY_FILLER 0x0100 104 #define IPV6_PRIORITY_UNATTENDED 0x0200 105 #define IPV6_PRIORITY_RESERVED1 0x0300 106 #define IPV6_PRIORITY_BULK 0x0400 107 #define IPV6_PRIORITY_RESERVED2 0x0500 108 #define IPV6_PRIORITY_INTERACTIVE 0x0600 109 #define IPV6_PRIORITY_CONTROL 0x0700 110 #define IPV6_PRIORITY_8 0x0800 111 #define IPV6_PRIORITY_9 0x0900 112 #define IPV6_PRIORITY_10 0x0a00 113 #define IPV6_PRIORITY_11 0x0b00 114 #define IPV6_PRIORITY_12 0x0c00 115 #define IPV6_PRIORITY_13 0x0d00 116 #define IPV6_PRIORITY_14 0x0e00 117 #define IPV6_PRIORITY_15 0x0f00 118 119 /* 120 * IPV6 extension headers 121 */ 122 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */ 123 #define IPPROTO_ROUTING 43 /* IPv6 routing header */ 124 #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */ 125 #define IPPROTO_ICMPV6 58 /* ICMPv6 */ 126 #define IPPROTO_NONE 59 /* IPv6 no next header */ 127 #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */ 128 #define IPPROTO_MH 135 /* IPv6 mobility header */ 129 130 /* 131 * IPv6 TLV options. 132 */ 133 #define IPV6_TLV_PAD0 0 134 #define IPV6_TLV_PADN 1 135 #define IPV6_TLV_ROUTERALERT 5 136 #define IPV6_TLV_JUMBO 194 137 #define IPV6_TLV_HAO 201 /* home address option */ 138 139 /* 140 * IPV6 socket options 141 */ 142 143 #define IPV6_ADDRFORM 1 144 #define IPV6_2292PKTINFO 2 145 #define IPV6_2292HOPOPTS 3 146 #define IPV6_2292DSTOPTS 4 147 #define IPV6_2292RTHDR 5 148 #define IPV6_2292PKTOPTIONS 6 149 #define IPV6_CHECKSUM 7 150 #define IPV6_2292HOPLIMIT 8 151 #define IPV6_NEXTHOP 9 152 #define IPV6_AUTHHDR 10 /* obsolete */ 153 #define IPV6_FLOWINFO 11 154 155 #define IPV6_UNICAST_HOPS 16 156 #define IPV6_MULTICAST_IF 17 157 #define IPV6_MULTICAST_HOPS 18 158 #define IPV6_MULTICAST_LOOP 19 159 #define IPV6_ADD_MEMBERSHIP 20 160 #define IPV6_DROP_MEMBERSHIP 21 161 #define IPV6_ROUTER_ALERT 22 162 #define IPV6_MTU_DISCOVER 23 163 #define IPV6_MTU 24 164 #define IPV6_RECVERR 25 165 #define IPV6_V6ONLY 26 166 #define IPV6_JOIN_ANYCAST 27 167 #define IPV6_LEAVE_ANYCAST 28 168 169 /* IPV6_MTU_DISCOVER values */ 170 #define IPV6_PMTUDISC_DONT 0 171 #define IPV6_PMTUDISC_WANT 1 172 #define IPV6_PMTUDISC_DO 2 173 #define IPV6_PMTUDISC_PROBE 3 174 175 /* Flowlabel */ 176 #define IPV6_FLOWLABEL_MGR 32 177 #define IPV6_FLOWINFO_SEND 33 178 179 #define IPV6_IPSEC_POLICY 34 180 #define IPV6_XFRM_POLICY 35 181 182 /* 183 * Multicast: 184 * Following socket options are shared between IPv4 and IPv6. 185 * 186 * MCAST_JOIN_GROUP 42 187 * MCAST_BLOCK_SOURCE 43 188 * MCAST_UNBLOCK_SOURCE 44 189 * MCAST_LEAVE_GROUP 45 190 * MCAST_JOIN_SOURCE_GROUP 46 191 * MCAST_LEAVE_SOURCE_GROUP 47 192 * MCAST_MSFILTER 48 193 */ 194 195 /* 196 * Advanced API (RFC3542) (1) 197 * 198 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 199 */ 200 201 #define IPV6_RECVPKTINFO 49 202 #define IPV6_PKTINFO 50 203 #define IPV6_RECVHOPLIMIT 51 204 #define IPV6_HOPLIMIT 52 205 #define IPV6_RECVHOPOPTS 53 206 #define IPV6_HOPOPTS 54 207 #define IPV6_RTHDRDSTOPTS 55 208 #define IPV6_RECVRTHDR 56 209 #define IPV6_RTHDR 57 210 #define IPV6_RECVDSTOPTS 58 211 #define IPV6_DSTOPTS 59 212 #define IPV6_RECVPATHMTU 60 213 #define IPV6_PATHMTU 61 214 #define IPV6_DONTFRAG 62 215 #if 0 /* not yet */ 216 #define IPV6_USE_MIN_MTU 63 217 #endif 218 219 /* 220 * Netfilter (1) 221 * 222 * Following socket options are used in ip6_tables; 223 * see include/linux/netfilter_ipv6/ip6_tables.h. 224 * 225 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 226 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 227 */ 228 229 /* 230 * Advanced API (RFC3542) (2) 231 */ 232 #define IPV6_RECVTCLASS 66 233 #define IPV6_TCLASS 67 234 235 /* 236 * Netfilter (2) 237 * 238 * Following socket options are used in ip6_tables; 239 * see include/linux/netfilter_ipv6/ip6_tables.h. 240 * 241 * IP6T_SO_GET_REVISION_MATCH 68 242 * IP6T_SO_GET_REVISION_TARGET 69 243 */ 244 245 /* RFC5014: Source address selection */ 246 #define IPV6_ADDR_PREFERENCES 72 247 248 #define IPV6_PREFER_SRC_TMP 0x0001 249 #define IPV6_PREFER_SRC_PUBLIC 0x0002 250 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100 251 #define IPV6_PREFER_SRC_COA 0x0004 252 #define IPV6_PREFER_SRC_HOME 0x0400 253 #define IPV6_PREFER_SRC_CGA 0x0008 254 #define IPV6_PREFER_SRC_NONCGA 0x0800 255 256 /* RFC5082: Generalized Ttl Security Mechanism */ 257 #define IPV6_MINHOPCOUNT 73 258 259 #define IPV6_ORIGDSTADDR 74 260 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR 261 #define IPV6_TRANSPARENT 75 262 263 /* 264 * Multicast Routing: 265 * see include/linux/mroute6.h. 266 * 267 * MRT6_INIT 200 268 * MRT6_DONE 201 269 * MRT6_ADD_MIF 202 270 * MRT6_DEL_MIF 203 271 * MRT6_ADD_MFC 204 272 * MRT6_DEL_MFC 205 273 * MRT6_VERSION 206 274 * MRT6_ASSERT 207 275 * MRT6_PIM 208 276 * (reserved) 209 277 */ 278 #endif 279
