1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* 3 * Types and definitions for AF_INET6 4 * Linux INET6 implementation 5 * 6 * Authors: 7 * Pedro Roque <roque@di.fc.ul.pt> 8 * 9 * Sources: 10 * IPv6 Program Interfaces for BSD Systems 11 * <draft-ietf-ipngwg-bsd-api-05.txt> 12 * 13 * Advanced Sockets API for IPv6 14 * <draft-stevens-advanced-api-00.txt> 15 * 16 * This program is free software; you can redistribute it and/or 17 * modify it under the terms of the GNU General Public License 18 * as published by the Free Software Foundation; either version 19 * 2 of the License, or (at your option) any later version. 20 */ 21 22 #ifndef _LINUX_IN6_H 23 #define _LINUX_IN6_H 24 25 #include <linux/types.h> 26 #include <linux/libc-compat.h> 27 28 /* 29 * IPv6 address structure 30 */ 31 32 #if __UAPI_DEF_IN6_ADDR 33 struct in6_addr { 34 union { 35 __u8 u6_addr8[16]; 36 #if __UAPI_DEF_IN6_ADDR_ALT 37 __be16 u6_addr16[8]; 38 __be32 u6_addr32[4]; 39 #endif 40 } in6_u; 41 #define s6_addr in6_u.u6_addr8 42 #if __UAPI_DEF_IN6_ADDR_ALT 43 #define s6_addr16 in6_u.u6_addr16 44 #define s6_addr32 in6_u.u6_addr32 45 #endif 46 }; 47 #endif /* __UAPI_DEF_IN6_ADDR */ 48 49 #if __UAPI_DEF_SOCKADDR_IN6 50 struct sockaddr_in6 { 51 unsigned short int sin6_family; /* AF_INET6 */ 52 __be16 sin6_port; /* Transport layer port # */ 53 __be32 sin6_flowinfo; /* IPv6 flow information */ 54 struct in6_addr sin6_addr; /* IPv6 address */ 55 __u32 sin6_scope_id; /* scope id (new in RFC2553) */ 56 }; 57 #endif /* __UAPI_DEF_SOCKADDR_IN6 */ 58 59 #if __UAPI_DEF_IPV6_MREQ 60 struct ipv6_mreq { 61 /* IPv6 multicast address of group */ 62 struct in6_addr ipv6mr_multiaddr; 63 64 /* local IPv6 address of interface */ 65 int ipv6mr_ifindex; 66 }; 67 #endif /* __UAPI_DEF_IVP6_MREQ */ 68 69 #define ipv6mr_acaddr ipv6mr_multiaddr 70 71 struct in6_flowlabel_req { 72 struct in6_addr flr_dst; 73 __be32 flr_label; 74 __u8 flr_action; 75 __u8 flr_share; 76 __u16 flr_flags; 77 __u16 flr_expires; 78 __u16 flr_linger; 79 __u32 __flr_pad; 80 /* Options in format of IPV6_PKTOPTIONS */ 81 }; 82 83 #define IPV6_FL_A_GET 0 84 #define IPV6_FL_A_PUT 1 85 #define IPV6_FL_A_RENEW 2 86 87 #define IPV6_FL_F_CREATE 1 88 #define IPV6_FL_F_EXCL 2 89 #define IPV6_FL_F_REFLECT 4 90 #define IPV6_FL_F_REMOTE 8 91 92 #define IPV6_FL_S_NONE 0 93 #define IPV6_FL_S_EXCL 1 94 #define IPV6_FL_S_PROCESS 2 95 #define IPV6_FL_S_USER 3 96 #define IPV6_FL_S_ANY 255 97 98 99 /* 100 * Bitmask constant declarations to help applications select out the 101 * flow label and priority fields. 102 * 103 * Note that this are in host byte order while the flowinfo field of 104 * sockaddr_in6 is in network byte order. 105 */ 106 107 #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff 108 #define IPV6_FLOWINFO_PRIORITY 0x0ff00000 109 110 /* These definitions are obsolete */ 111 #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000 112 #define IPV6_PRIORITY_FILLER 0x0100 113 #define IPV6_PRIORITY_UNATTENDED 0x0200 114 #define IPV6_PRIORITY_RESERVED1 0x0300 115 #define IPV6_PRIORITY_BULK 0x0400 116 #define IPV6_PRIORITY_RESERVED2 0x0500 117 #define IPV6_PRIORITY_INTERACTIVE 0x0600 118 #define IPV6_PRIORITY_CONTROL 0x0700 119 #define IPV6_PRIORITY_8 0x0800 120 #define IPV6_PRIORITY_9 0x0900 121 #define IPV6_PRIORITY_10 0x0a00 122 #define IPV6_PRIORITY_11 0x0b00 123 #define IPV6_PRIORITY_12 0x0c00 124 #define IPV6_PRIORITY_13 0x0d00 125 #define IPV6_PRIORITY_14 0x0e00 126 #define IPV6_PRIORITY_15 0x0f00 127 128 /* 129 * IPV6 extension headers 130 */ 131 #if __UAPI_DEF_IPPROTO_V6 132 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */ 133 #define IPPROTO_ROUTING 43 /* IPv6 routing header */ 134 #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */ 135 #define IPPROTO_ICMPV6 58 /* ICMPv6 */ 136 #define IPPROTO_NONE 59 /* IPv6 no next header */ 137 #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */ 138 #define IPPROTO_MH 135 /* IPv6 mobility header */ 139 #endif /* __UAPI_DEF_IPPROTO_V6 */ 140 141 /* 142 * IPv6 TLV options. 143 */ 144 #define IPV6_TLV_PAD1 0 145 #define IPV6_TLV_PADN 1 146 #define IPV6_TLV_ROUTERALERT 5 147 #define IPV6_TLV_CALIPSO 7 /* RFC 5570 */ 148 #define IPV6_TLV_JUMBO 194 149 #define IPV6_TLV_HAO 201 /* home address option */ 150 151 /* 152 * IPV6 socket options 153 */ 154 #if __UAPI_DEF_IPV6_OPTIONS 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 #define IPV6_MULTICAST_ALL 29 181 #define IPV6_ROUTER_ALERT_ISOLATE 30 182 #define IPV6_RECVERR_RFC4884 31 183 184 /* 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 /* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4 190 * also see comments on IP_PMTUDISC_INTERFACE 191 */ 192 #define IPV6_PMTUDISC_INTERFACE 4 193 /* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to 194 * get fragmented if they exceed the interface mtu 195 */ 196 #define IPV6_PMTUDISC_OMIT 5 197 198 /* Flowlabel */ 199 #define IPV6_FLOWLABEL_MGR 32 200 #define IPV6_FLOWINFO_SEND 33 201 202 #define IPV6_IPSEC_POLICY 34 203 #define IPV6_XFRM_POLICY 35 204 #define IPV6_HDRINCL 36 205 #endif 206 207 /* 208 * Multicast: 209 * Following socket options are shared between IPv4 and IPv6. 210 * 211 * MCAST_JOIN_GROUP 42 212 * MCAST_BLOCK_SOURCE 43 213 * MCAST_UNBLOCK_SOURCE 44 214 * MCAST_LEAVE_GROUP 45 215 * MCAST_JOIN_SOURCE_GROUP 46 216 * MCAST_LEAVE_SOURCE_GROUP 47 217 * MCAST_MSFILTER 48 218 */ 219 220 /* 221 * Advanced API (RFC3542) (1) 222 * 223 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 224 */ 225 226 #define IPV6_RECVPKTINFO 49 227 #define IPV6_PKTINFO 50 228 #define IPV6_RECVHOPLIMIT 51 229 #define IPV6_HOPLIMIT 52 230 #define IPV6_RECVHOPOPTS 53 231 #define IPV6_HOPOPTS 54 232 #define IPV6_RTHDRDSTOPTS 55 233 #define IPV6_RECVRTHDR 56 234 #define IPV6_RTHDR 57 235 #define IPV6_RECVDSTOPTS 58 236 #define IPV6_DSTOPTS 59 237 #define IPV6_RECVPATHMTU 60 238 #define IPV6_PATHMTU 61 239 #define IPV6_DONTFRAG 62 240 #if 0 /* not yet */ 241 #define IPV6_USE_MIN_MTU 63 242 #endif 243 244 /* 245 * Netfilter (1) 246 * 247 * Following socket options are used in ip6_tables; 248 * see include/linux/netfilter_ipv6/ip6_tables.h. 249 * 250 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 251 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 252 */ 253 254 /* 255 * Advanced API (RFC3542) (2) 256 */ 257 #define IPV6_RECVTCLASS 66 258 #define IPV6_TCLASS 67 259 260 /* 261 * Netfilter (2) 262 * 263 * Following socket options are used in ip6_tables; 264 * see include/linux/netfilter_ipv6/ip6_tables.h. 265 * 266 * IP6T_SO_GET_REVISION_MATCH 68 267 * IP6T_SO_GET_REVISION_TARGET 69 268 * IP6T_SO_ORIGINAL_DST 80 269 */ 270 271 #define IPV6_AUTOFLOWLABEL 70 272 /* RFC5014: Source address selection */ 273 #define IPV6_ADDR_PREFERENCES 72 274 275 #define IPV6_PREFER_SRC_TMP 0x0001 276 #define IPV6_PREFER_SRC_PUBLIC 0x0002 277 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100 278 #define IPV6_PREFER_SRC_COA 0x0004 279 #define IPV6_PREFER_SRC_HOME 0x0400 280 #define IPV6_PREFER_SRC_CGA 0x0008 281 #define IPV6_PREFER_SRC_NONCGA 0x0800 282 283 /* RFC5082: Generalized Ttl Security Mechanism */ 284 #define IPV6_MINHOPCOUNT 73 285 286 #define IPV6_ORIGDSTADDR 74 287 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR 288 #define IPV6_TRANSPARENT 75 289 #define IPV6_UNICAST_IF 76 290 #define IPV6_RECVFRAGSIZE 77 291 #define IPV6_FREEBIND 78 292 293 /* 294 * Multicast Routing: 295 * see include/uapi/linux/mroute6.h. 296 * 297 * MRT6_BASE 200 298 * ... 299 * MRT6_MAX 300 */ 301 #endif /* _LINUX_IN6_H */ 302
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