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 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 { 32 union 33 { 34 __u8 u6_addr8[16]; 35 __be16 u6_addr16[8]; 36 __be32 u6_addr32[4]; 37 } in6_u; 38 #define s6_addr in6_u.u6_addr8 39 #define s6_addr16 in6_u.u6_addr16 40 #define s6_addr32 in6_u.u6_addr32 41 }; 42 43 /* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553 44 * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined 45 * in network byte order, not in host byte order as are the IPv4 equivalents 46 */ 47 extern const struct in6_addr in6addr_any; 48 #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } 49 extern const struct in6_addr in6addr_loopback; 50 #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 51 #ifdef __KERNEL__ 52 extern const struct in6_addr in6addr_linklocal_allnodes; 53 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \ 54 { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 55 extern const struct in6_addr in6addr_linklocal_allrouters; 56 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \ 57 { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2 } } } 58 #endif 59 60 struct sockaddr_in6 { 61 unsigned short int sin6_family; /* AF_INET6 */ 62 __be16 sin6_port; /* Transport layer port # */ 63 __be32 sin6_flowinfo; /* IPv6 flow information */ 64 struct in6_addr sin6_addr; /* IPv6 address */ 65 __u32 sin6_scope_id; /* scope id (new in RFC2553) */ 66 }; 67 68 struct ipv6_mreq { 69 /* IPv6 multicast address of group */ 70 struct in6_addr ipv6mr_multiaddr; 71 72 /* local IPv6 address of interface */ 73 int ipv6mr_ifindex; 74 }; 75 76 #define ipv6mr_acaddr ipv6mr_multiaddr 77 78 struct in6_flowlabel_req 79 { 80 struct in6_addr flr_dst; 81 __be32 flr_label; 82 __u8 flr_action; 83 __u8 flr_share; 84 __u16 flr_flags; 85 __u16 flr_expires; 86 __u16 flr_linger; 87 __u32 __flr_pad; 88 /* Options in format of IPV6_PKTOPTIONS */ 89 }; 90 91 #define IPV6_FL_A_GET 0 92 #define IPV6_FL_A_PUT 1 93 #define IPV6_FL_A_RENEW 2 94 95 #define IPV6_FL_F_CREATE 1 96 #define IPV6_FL_F_EXCL 2 97 98 #define IPV6_FL_S_NONE 0 99 #define IPV6_FL_S_EXCL 1 100 #define IPV6_FL_S_PROCESS 2 101 #define IPV6_FL_S_USER 3 102 #define IPV6_FL_S_ANY 255 103 104 105 /* 106 * Bitmask constant declarations to help applications select out the 107 * flow label and priority fields. 108 * 109 * Note that this are in host byte order while the flowinfo field of 110 * sockaddr_in6 is in network byte order. 111 */ 112 113 #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff 114 #define IPV6_FLOWINFO_PRIORITY 0x0ff00000 115 116 /* These defintions are obsolete */ 117 #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000 118 #define IPV6_PRIORITY_FILLER 0x0100 119 #define IPV6_PRIORITY_UNATTENDED 0x0200 120 #define IPV6_PRIORITY_RESERVED1 0x0300 121 #define IPV6_PRIORITY_BULK 0x0400 122 #define IPV6_PRIORITY_RESERVED2 0x0500 123 #define IPV6_PRIORITY_INTERACTIVE 0x0600 124 #define IPV6_PRIORITY_CONTROL 0x0700 125 #define IPV6_PRIORITY_8 0x0800 126 #define IPV6_PRIORITY_9 0x0900 127 #define IPV6_PRIORITY_10 0x0a00 128 #define IPV6_PRIORITY_11 0x0b00 129 #define IPV6_PRIORITY_12 0x0c00 130 #define IPV6_PRIORITY_13 0x0d00 131 #define IPV6_PRIORITY_14 0x0e00 132 #define IPV6_PRIORITY_15 0x0f00 133 134 /* 135 * IPV6 extension headers 136 */ 137 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */ 138 #define IPPROTO_ROUTING 43 /* IPv6 routing header */ 139 #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */ 140 #define IPPROTO_ICMPV6 58 /* ICMPv6 */ 141 #define IPPROTO_NONE 59 /* IPv6 no next header */ 142 #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */ 143 #define IPPROTO_MH 135 /* IPv6 mobility header */ 144 145 /* 146 * IPv6 TLV options. 147 */ 148 #define IPV6_TLV_PAD0 0 149 #define IPV6_TLV_PADN 1 150 #define IPV6_TLV_ROUTERALERT 5 151 #define IPV6_TLV_JUMBO 194 152 #define IPV6_TLV_HAO 201 /* home address option */ 153 154 /* 155 * IPV6 socket options 156 */ 157 158 #define IPV6_ADDRFORM 1 159 #define IPV6_2292PKTINFO 2 160 #define IPV6_2292HOPOPTS 3 161 #define IPV6_2292DSTOPTS 4 162 #define IPV6_2292RTHDR 5 163 #define IPV6_2292PKTOPTIONS 6 164 #define IPV6_CHECKSUM 7 165 #define IPV6_2292HOPLIMIT 8 166 #define IPV6_NEXTHOP 9 167 #define IPV6_AUTHHDR 10 /* obsolete */ 168 #define IPV6_FLOWINFO 11 169 170 #define IPV6_UNICAST_HOPS 16 171 #define IPV6_MULTICAST_IF 17 172 #define IPV6_MULTICAST_HOPS 18 173 #define IPV6_MULTICAST_LOOP 19 174 #define IPV6_ADD_MEMBERSHIP 20 175 #define IPV6_DROP_MEMBERSHIP 21 176 #define IPV6_ROUTER_ALERT 22 177 #define IPV6_MTU_DISCOVER 23 178 #define IPV6_MTU 24 179 #define IPV6_RECVERR 25 180 #define IPV6_V6ONLY 26 181 #define IPV6_JOIN_ANYCAST 27 182 #define IPV6_LEAVE_ANYCAST 28 183 184 /* IPV6_MTU_DISCOVER values */ 185 #define IPV6_PMTUDISC_DONT 0 186 #define IPV6_PMTUDISC_WANT 1 187 #define IPV6_PMTUDISC_DO 2 188 #define IPV6_PMTUDISC_PROBE 3 189 190 /* Flowlabel */ 191 #define IPV6_FLOWLABEL_MGR 32 192 #define IPV6_FLOWINFO_SEND 33 193 194 #define IPV6_IPSEC_POLICY 34 195 #define IPV6_XFRM_POLICY 35 196 197 /* 198 * Multicast: 199 * Following socket options are shared between IPv4 and IPv6. 200 * 201 * MCAST_JOIN_GROUP 42 202 * MCAST_BLOCK_SOURCE 43 203 * MCAST_UNBLOCK_SOURCE 44 204 * MCAST_LEAVE_GROUP 45 205 * MCAST_JOIN_SOURCE_GROUP 46 206 * MCAST_LEAVE_SOURCE_GROUP 47 207 * MCAST_MSFILTER 48 208 */ 209 210 /* 211 * Advanced API (RFC3542) (1) 212 * 213 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 214 */ 215 216 #define IPV6_RECVPKTINFO 49 217 #define IPV6_PKTINFO 50 218 #define IPV6_RECVHOPLIMIT 51 219 #define IPV6_HOPLIMIT 52 220 #define IPV6_RECVHOPOPTS 53 221 #define IPV6_HOPOPTS 54 222 #define IPV6_RTHDRDSTOPTS 55 223 #define IPV6_RECVRTHDR 56 224 #define IPV6_RTHDR 57 225 #define IPV6_RECVDSTOPTS 58 226 #define IPV6_DSTOPTS 59 227 #if 0 /* not yet */ 228 #define IPV6_RECVPATHMTU 60 229 #define IPV6_PATHMTU 61 230 #define IPV6_DONTFRAG 62 231 #define IPV6_USE_MIN_MTU 63 232 #endif 233 234 /* 235 * Netfilter (1) 236 * 237 * Following socket options are used in ip6_tables; 238 * see include/linux/netfilter_ipv6/ip6_tables.h. 239 * 240 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 241 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 242 */ 243 244 /* 245 * Advanced API (RFC3542) (2) 246 */ 247 #define IPV6_RECVTCLASS 66 248 #define IPV6_TCLASS 67 249 250 /* 251 * Netfilter (2) 252 * 253 * Following socket options are used in ip6_tables; 254 * see include/linux/netfilter_ipv6/ip6_tables.h. 255 * 256 * IP6T_SO_GET_REVISION_MATCH 68 257 * IP6T_SO_GET_REVISION_TARGET 69 258 */ 259 260 /* RFC5014: Source address selection */ 261 #define IPV6_ADDR_PREFERENCES 72 262 263 #define IPV6_PREFER_SRC_TMP 0x0001 264 #define IPV6_PREFER_SRC_PUBLIC 0x0002 265 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100 266 #define IPV6_PREFER_SRC_COA 0x0004 267 #define IPV6_PREFER_SRC_HOME 0x0400 268 #define IPV6_PREFER_SRC_CGA 0x0008 269 #define IPV6_PREFER_SRC_NONCGA 0x0800 270 271 /* 272 * Multicast Routing: 273 * see include/linux/mroute6.h. 274 * 275 * MRT6_INIT 200 276 * MRT6_DONE 201 277 * MRT6_ADD_MIF 202 278 * MRT6_DEL_MIF 203 279 * MRT6_ADD_MFC 204 280 * MRT6_DEL_MFC 205 281 * MRT6_VERSION 206 282 * MRT6_ASSERT 207 283 * MRT6_PIM 208 284 * (reserved) 209 285 */ 286 #endif 287