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 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 #ifdef __KERNEL__ 46 extern const struct in6_addr in6addr_any; 47 #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } 48 extern const struct in6_addr in6addr_loopback; 49 #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 50 extern const struct in6_addr in6addr_linklocal_allnodes; 51 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT \ 52 { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 53 extern const struct in6_addr in6addr_linklocal_allrouters; 54 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \ 55 { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2 } } } 56 #endif 57 58 struct sockaddr_in6 { 59 unsigned short int sin6_family; /* AF_INET6 */ 60 __be16 sin6_port; /* Transport layer port # */ 61 __be32 sin6_flowinfo; /* IPv6 flow information */ 62 struct in6_addr sin6_addr; /* IPv6 address */ 63 __u32 sin6_scope_id; /* scope id (new in RFC2553) */ 64 }; 65 66 struct ipv6_mreq { 67 /* IPv6 multicast address of group */ 68 struct in6_addr ipv6mr_multiaddr; 69 70 /* local IPv6 address of interface */ 71 int ipv6mr_ifindex; 72 }; 73 74 #define ipv6mr_acaddr ipv6mr_multiaddr 75 76 struct in6_flowlabel_req { 77 struct in6_addr flr_dst; 78 __be32 flr_label; 79 __u8 flr_action; 80 __u8 flr_share; 81 __u16 flr_flags; 82 __u16 flr_expires; 83 __u16 flr_linger; 84 __u32 __flr_pad; 85 /* Options in format of IPV6_PKTOPTIONS */ 86 }; 87 88 #define IPV6_FL_A_GET 0 89 #define IPV6_FL_A_PUT 1 90 #define IPV6_FL_A_RENEW 2 91 92 #define IPV6_FL_F_CREATE 1 93 #define IPV6_FL_F_EXCL 2 94 95 #define IPV6_FL_S_NONE 0 96 #define IPV6_FL_S_EXCL 1 97 #define IPV6_FL_S_PROCESS 2 98 #define IPV6_FL_S_USER 3 99 #define IPV6_FL_S_ANY 255 100 101 102 /* 103 * Bitmask constant declarations to help applications select out the 104 * flow label and priority fields. 105 * 106 * Note that this are in host byte order while the flowinfo field of 107 * sockaddr_in6 is in network byte order. 108 */ 109 110 #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff 111 #define IPV6_FLOWINFO_PRIORITY 0x0ff00000 112 113 /* These definitions are obsolete */ 114 #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000 115 #define IPV6_PRIORITY_FILLER 0x0100 116 #define IPV6_PRIORITY_UNATTENDED 0x0200 117 #define IPV6_PRIORITY_RESERVED1 0x0300 118 #define IPV6_PRIORITY_BULK 0x0400 119 #define IPV6_PRIORITY_RESERVED2 0x0500 120 #define IPV6_PRIORITY_INTERACTIVE 0x0600 121 #define IPV6_PRIORITY_CONTROL 0x0700 122 #define IPV6_PRIORITY_8 0x0800 123 #define IPV6_PRIORITY_9 0x0900 124 #define IPV6_PRIORITY_10 0x0a00 125 #define IPV6_PRIORITY_11 0x0b00 126 #define IPV6_PRIORITY_12 0x0c00 127 #define IPV6_PRIORITY_13 0x0d00 128 #define IPV6_PRIORITY_14 0x0e00 129 #define IPV6_PRIORITY_15 0x0f00 130 131 /* 132 * IPV6 extension headers 133 */ 134 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */ 135 #define IPPROTO_ROUTING 43 /* IPv6 routing header */ 136 #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */ 137 #define IPPROTO_ICMPV6 58 /* ICMPv6 */ 138 #define IPPROTO_NONE 59 /* IPv6 no next header */ 139 #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */ 140 #define IPPROTO_MH 135 /* IPv6 mobility header */ 141 142 /* 143 * IPv6 TLV options. 144 */ 145 #define IPV6_TLV_PAD0 0 146 #define IPV6_TLV_PADN 1 147 #define IPV6_TLV_ROUTERALERT 5 148 #define IPV6_TLV_JUMBO 194 149 #define IPV6_TLV_HAO 201 /* home address option */ 150 151 /* 152 * IPV6 socket options 153 */ 154 155 #define IPV6_ADDRFORM 1 156 #define IPV6_2292PKTINFO 2 157 #define IPV6_2292HOPOPTS 3 158 #define IPV6_2292DSTOPTS 4 159 #define IPV6_2292RTHDR 5 160 #define IPV6_2292PKTOPTIONS 6 161 #define IPV6_CHECKSUM 7 162 #define IPV6_2292HOPLIMIT 8 163 #define IPV6_NEXTHOP 9 164 #define IPV6_AUTHHDR 10 /* obsolete */ 165 #define IPV6_FLOWINFO 11 166 167 #define IPV6_UNICAST_HOPS 16 168 #define IPV6_MULTICAST_IF 17 169 #define IPV6_MULTICAST_HOPS 18 170 #define IPV6_MULTICAST_LOOP 19 171 #define IPV6_ADD_MEMBERSHIP 20 172 #define IPV6_DROP_MEMBERSHIP 21 173 #define IPV6_ROUTER_ALERT 22 174 #define IPV6_MTU_DISCOVER 23 175 #define IPV6_MTU 24 176 #define IPV6_RECVERR 25 177 #define IPV6_V6ONLY 26 178 #define IPV6_JOIN_ANYCAST 27 179 #define IPV6_LEAVE_ANYCAST 28 180 181 /* IPV6_MTU_DISCOVER values */ 182 #define IPV6_PMTUDISC_DONT 0 183 #define IPV6_PMTUDISC_WANT 1 184 #define IPV6_PMTUDISC_DO 2 185 #define IPV6_PMTUDISC_PROBE 3 186 187 /* Flowlabel */ 188 #define IPV6_FLOWLABEL_MGR 32 189 #define IPV6_FLOWINFO_SEND 33 190 191 #define IPV6_IPSEC_POLICY 34 192 #define IPV6_XFRM_POLICY 35 193 194 /* 195 * Multicast: 196 * Following socket options are shared between IPv4 and IPv6. 197 * 198 * MCAST_JOIN_GROUP 42 199 * MCAST_BLOCK_SOURCE 43 200 * MCAST_UNBLOCK_SOURCE 44 201 * MCAST_LEAVE_GROUP 45 202 * MCAST_JOIN_SOURCE_GROUP 46 203 * MCAST_LEAVE_SOURCE_GROUP 47 204 * MCAST_MSFILTER 48 205 */ 206 207 /* 208 * Advanced API (RFC3542) (1) 209 * 210 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 211 */ 212 213 #define IPV6_RECVPKTINFO 49 214 #define IPV6_PKTINFO 50 215 #define IPV6_RECVHOPLIMIT 51 216 #define IPV6_HOPLIMIT 52 217 #define IPV6_RECVHOPOPTS 53 218 #define IPV6_HOPOPTS 54 219 #define IPV6_RTHDRDSTOPTS 55 220 #define IPV6_RECVRTHDR 56 221 #define IPV6_RTHDR 57 222 #define IPV6_RECVDSTOPTS 58 223 #define IPV6_DSTOPTS 59 224 #define IPV6_RECVPATHMTU 60 225 #define IPV6_PATHMTU 61 226 #define IPV6_DONTFRAG 62 227 #if 0 /* not yet */ 228 #define IPV6_USE_MIN_MTU 63 229 #endif 230 231 /* 232 * Netfilter (1) 233 * 234 * Following socket options are used in ip6_tables; 235 * see include/linux/netfilter_ipv6/ip6_tables.h. 236 * 237 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 238 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 239 */ 240 241 /* 242 * Advanced API (RFC3542) (2) 243 */ 244 #define IPV6_RECVTCLASS 66 245 #define IPV6_TCLASS 67 246 247 /* 248 * Netfilter (2) 249 * 250 * Following socket options are used in ip6_tables; 251 * see include/linux/netfilter_ipv6/ip6_tables.h. 252 * 253 * IP6T_SO_GET_REVISION_MATCH 68 254 * IP6T_SO_GET_REVISION_TARGET 69 255 */ 256 257 /* RFC5014: Source address selection */ 258 #define IPV6_ADDR_PREFERENCES 72 259 260 #define IPV6_PREFER_SRC_TMP 0x0001 261 #define IPV6_PREFER_SRC_PUBLIC 0x0002 262 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100 263 #define IPV6_PREFER_SRC_COA 0x0004 264 #define IPV6_PREFER_SRC_HOME 0x0400 265 #define IPV6_PREFER_SRC_CGA 0x0008 266 #define IPV6_PREFER_SRC_NONCGA 0x0800 267 268 /* RFC5082: Generalized Ttl Security Mechanism */ 269 #define IPV6_MINHOPCOUNT 73 270 271 #define IPV6_ORIGDSTADDR 74 272 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR 273 #define IPV6_TRANSPARENT 75 274 275 /* 276 * Multicast Routing: 277 * see include/linux/mroute6.h. 278 * 279 * MRT6_INIT 200 280 * MRT6_DONE 201 281 * MRT6_ADD_MIF 202 282 * MRT6_DEL_MIF 203 283 * MRT6_ADD_MFC 204 284 * MRT6_DEL_MFC 205 285 * MRT6_VERSION 206 286 * MRT6_ASSERT 207 287 * MRT6_PIM 208 288 * (reserved) 209 289 */ 290 #endif 291