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 #include <linux/libc-compat.h> 26 27 /* 28 * IPv6 address structure 29 */ 30 31 #if __UAPI_DEF_IN6_ADDR 32 struct in6_addr { 33 union { 34 __u8 u6_addr8[16]; 35 #if __UAPI_DEF_IN6_ADDR_ALT 36 __be16 u6_addr16[8]; 37 __be32 u6_addr32[4]; 38 #endif 39 } in6_u; 40 #define s6_addr in6_u.u6_addr8 41 #if __UAPI_DEF_IN6_ADDR_ALT 42 #define s6_addr16 in6_u.u6_addr16 43 #define s6_addr32 in6_u.u6_addr32 44 #endif 45 }; 46 #endif /* __UAPI_DEF_IN6_ADDR */ 47 48 #if __UAPI_DEF_SOCKADDR_IN6 49 struct sockaddr_in6 { 50 unsigned short int sin6_family; /* AF_INET6 */ 51 __be16 sin6_port; /* Transport layer port # */ 52 __be32 sin6_flowinfo; /* IPv6 flow information */ 53 struct in6_addr sin6_addr; /* IPv6 address */ 54 __u32 sin6_scope_id; /* scope id (new in RFC2553) */ 55 }; 56 #endif /* __UAPI_DEF_SOCKADDR_IN6 */ 57 58 #if __UAPI_DEF_IPV6_MREQ 59 struct ipv6_mreq { 60 /* IPv6 multicast address of group */ 61 struct in6_addr ipv6mr_multiaddr; 62 63 /* local IPv6 address of interface */ 64 int ipv6mr_ifindex; 65 }; 66 #endif /* __UAPI_DEF_IVP6_MREQ */ 67 68 #define ipv6mr_acaddr ipv6mr_multiaddr 69 70 struct in6_flowlabel_req { 71 struct in6_addr flr_dst; 72 __be32 flr_label; 73 __u8 flr_action; 74 __u8 flr_share; 75 __u16 flr_flags; 76 __u16 flr_expires; 77 __u16 flr_linger; 78 __u32 __flr_pad; 79 /* Options in format of IPV6_PKTOPTIONS */ 80 }; 81 82 #define IPV6_FL_A_GET 0 83 #define IPV6_FL_A_PUT 1 84 #define IPV6_FL_A_RENEW 2 85 86 #define IPV6_FL_F_CREATE 1 87 #define IPV6_FL_F_EXCL 2 88 #define IPV6_FL_F_REFLECT 4 89 #define IPV6_FL_F_REMOTE 8 90 91 #define IPV6_FL_S_NONE 0 92 #define IPV6_FL_S_EXCL 1 93 #define IPV6_FL_S_PROCESS 2 94 #define IPV6_FL_S_USER 3 95 #define IPV6_FL_S_ANY 255 96 97 98 /* 99 * Bitmask constant declarations to help applications select out the 100 * flow label and priority fields. 101 * 102 * Note that this are in host byte order while the flowinfo field of 103 * sockaddr_in6 is in network byte order. 104 */ 105 106 #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff 107 #define IPV6_FLOWINFO_PRIORITY 0x0ff00000 108 109 /* These definitions are obsolete */ 110 #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000 111 #define IPV6_PRIORITY_FILLER 0x0100 112 #define IPV6_PRIORITY_UNATTENDED 0x0200 113 #define IPV6_PRIORITY_RESERVED1 0x0300 114 #define IPV6_PRIORITY_BULK 0x0400 115 #define IPV6_PRIORITY_RESERVED2 0x0500 116 #define IPV6_PRIORITY_INTERACTIVE 0x0600 117 #define IPV6_PRIORITY_CONTROL 0x0700 118 #define IPV6_PRIORITY_8 0x0800 119 #define IPV6_PRIORITY_9 0x0900 120 #define IPV6_PRIORITY_10 0x0a00 121 #define IPV6_PRIORITY_11 0x0b00 122 #define IPV6_PRIORITY_12 0x0c00 123 #define IPV6_PRIORITY_13 0x0d00 124 #define IPV6_PRIORITY_14 0x0e00 125 #define IPV6_PRIORITY_15 0x0f00 126 127 /* 128 * IPV6 extension headers 129 */ 130 #if __UAPI_DEF_IPPROTO_V6 131 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */ 132 #define IPPROTO_ROUTING 43 /* IPv6 routing header */ 133 #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */ 134 #define IPPROTO_ICMPV6 58 /* ICMPv6 */ 135 #define IPPROTO_NONE 59 /* IPv6 no next header */ 136 #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */ 137 #define IPPROTO_MH 135 /* IPv6 mobility header */ 138 #endif /* __UAPI_DEF_IPPROTO_V6 */ 139 140 /* 141 * IPv6 TLV options. 142 */ 143 #define IPV6_TLV_PAD1 0 144 #define IPV6_TLV_PADN 1 145 #define IPV6_TLV_ROUTERALERT 5 146 #define IPV6_TLV_JUMBO 194 147 #define IPV6_TLV_HAO 201 /* home address option */ 148 149 /* 150 * IPV6 socket options 151 */ 152 #if __UAPI_DEF_IPV6_OPTIONS 153 #define IPV6_ADDRFORM 1 154 #define IPV6_2292PKTINFO 2 155 #define IPV6_2292HOPOPTS 3 156 #define IPV6_2292DSTOPTS 4 157 #define IPV6_2292RTHDR 5 158 #define IPV6_2292PKTOPTIONS 6 159 #define IPV6_CHECKSUM 7 160 #define IPV6_2292HOPLIMIT 8 161 #define IPV6_NEXTHOP 9 162 #define IPV6_AUTHHDR 10 /* obsolete */ 163 #define IPV6_FLOWINFO 11 164 165 #define IPV6_UNICAST_HOPS 16 166 #define IPV6_MULTICAST_IF 17 167 #define IPV6_MULTICAST_HOPS 18 168 #define IPV6_MULTICAST_LOOP 19 169 #define IPV6_ADD_MEMBERSHIP 20 170 #define IPV6_DROP_MEMBERSHIP 21 171 #define IPV6_ROUTER_ALERT 22 172 #define IPV6_MTU_DISCOVER 23 173 #define IPV6_MTU 24 174 #define IPV6_RECVERR 25 175 #define IPV6_V6ONLY 26 176 #define IPV6_JOIN_ANYCAST 27 177 #define IPV6_LEAVE_ANYCAST 28 178 179 /* IPV6_MTU_DISCOVER values */ 180 #define IPV6_PMTUDISC_DONT 0 181 #define IPV6_PMTUDISC_WANT 1 182 #define IPV6_PMTUDISC_DO 2 183 #define IPV6_PMTUDISC_PROBE 3 184 /* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4 185 * also see comments on IP_PMTUDISC_INTERFACE 186 */ 187 #define IPV6_PMTUDISC_INTERFACE 4 188 /* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to 189 * get fragmented if they exceed the interface mtu 190 */ 191 #define IPV6_PMTUDISC_OMIT 5 192 193 /* Flowlabel */ 194 #define IPV6_FLOWLABEL_MGR 32 195 #define IPV6_FLOWINFO_SEND 33 196 197 #define IPV6_IPSEC_POLICY 34 198 #define IPV6_XFRM_POLICY 35 199 #define IPV6_HDRINCL 36 200 #endif 201 202 /* 203 * Multicast: 204 * Following socket options are shared between IPv4 and IPv6. 205 * 206 * MCAST_JOIN_GROUP 42 207 * MCAST_BLOCK_SOURCE 43 208 * MCAST_UNBLOCK_SOURCE 44 209 * MCAST_LEAVE_GROUP 45 210 * MCAST_JOIN_SOURCE_GROUP 46 211 * MCAST_LEAVE_SOURCE_GROUP 47 212 * MCAST_MSFILTER 48 213 */ 214 215 /* 216 * Advanced API (RFC3542) (1) 217 * 218 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 219 */ 220 221 #define IPV6_RECVPKTINFO 49 222 #define IPV6_PKTINFO 50 223 #define IPV6_RECVHOPLIMIT 51 224 #define IPV6_HOPLIMIT 52 225 #define IPV6_RECVHOPOPTS 53 226 #define IPV6_HOPOPTS 54 227 #define IPV6_RTHDRDSTOPTS 55 228 #define IPV6_RECVRTHDR 56 229 #define IPV6_RTHDR 57 230 #define IPV6_RECVDSTOPTS 58 231 #define IPV6_DSTOPTS 59 232 #define IPV6_RECVPATHMTU 60 233 #define IPV6_PATHMTU 61 234 #define IPV6_DONTFRAG 62 235 #if 0 /* not yet */ 236 #define IPV6_USE_MIN_MTU 63 237 #endif 238 239 /* 240 * Netfilter (1) 241 * 242 * Following socket options are used in ip6_tables; 243 * see include/linux/netfilter_ipv6/ip6_tables.h. 244 * 245 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 246 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 247 */ 248 249 /* 250 * Advanced API (RFC3542) (2) 251 */ 252 #define IPV6_RECVTCLASS 66 253 #define IPV6_TCLASS 67 254 255 /* 256 * Netfilter (2) 257 * 258 * Following socket options are used in ip6_tables; 259 * see include/linux/netfilter_ipv6/ip6_tables.h. 260 * 261 * IP6T_SO_GET_REVISION_MATCH 68 262 * IP6T_SO_GET_REVISION_TARGET 69 263 * IP6T_SO_ORIGINAL_DST 80 264 */ 265 266 #define IPV6_AUTOFLOWLABEL 70 267 /* RFC5014: Source address selection */ 268 #define IPV6_ADDR_PREFERENCES 72 269 270 #define IPV6_PREFER_SRC_TMP 0x0001 271 #define IPV6_PREFER_SRC_PUBLIC 0x0002 272 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100 273 #define IPV6_PREFER_SRC_COA 0x0004 274 #define IPV6_PREFER_SRC_HOME 0x0400 275 #define IPV6_PREFER_SRC_CGA 0x0008 276 #define IPV6_PREFER_SRC_NONCGA 0x0800 277 278 /* RFC5082: Generalized Ttl Security Mechanism */ 279 #define IPV6_MINHOPCOUNT 73 280 281 #define IPV6_ORIGDSTADDR 74 282 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR 283 #define IPV6_TRANSPARENT 75 284 #define IPV6_UNICAST_IF 76 285 286 /* 287 * Multicast Routing: 288 * see include/uapi/linux/mroute6.h. 289 * 290 * MRT6_BASE 200 291 * ... 292 * MRT6_MAX 293 */ 294 #endif /* _LINUX_IN6_H */ 295
