in6.h (7577B) - Raw
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_IOAM 49 /* RFC 9486 */ 149 #define IPV6_TLV_JUMBO 194 150 #define IPV6_TLV_HAO 201 /* home address option */ 151 152 /* 153 * IPV6 socket options 154 */ 155 #if __UAPI_DEF_IPV6_OPTIONS 156 #define IPV6_ADDRFORM 1 157 #define IPV6_2292PKTINFO 2 158 #define IPV6_2292HOPOPTS 3 159 #define IPV6_2292DSTOPTS 4 160 #define IPV6_2292RTHDR 5 161 #define IPV6_2292PKTOPTIONS 6 162 #define IPV6_CHECKSUM 7 163 #define IPV6_2292HOPLIMIT 8 164 #define IPV6_NEXTHOP 9 165 #define IPV6_AUTHHDR 10 /* obsolete */ 166 #define IPV6_FLOWINFO 11 167 168 #define IPV6_UNICAST_HOPS 16 169 #define IPV6_MULTICAST_IF 17 170 #define IPV6_MULTICAST_HOPS 18 171 #define IPV6_MULTICAST_LOOP 19 172 #define IPV6_ADD_MEMBERSHIP 20 173 #define IPV6_DROP_MEMBERSHIP 21 174 #define IPV6_ROUTER_ALERT 22 175 #define IPV6_MTU_DISCOVER 23 176 #define IPV6_MTU 24 177 #define IPV6_RECVERR 25 178 #define IPV6_V6ONLY 26 179 #define IPV6_JOIN_ANYCAST 27 180 #define IPV6_LEAVE_ANYCAST 28 181 #define IPV6_MULTICAST_ALL 29 182 #define IPV6_ROUTER_ALERT_ISOLATE 30 183 #define IPV6_RECVERR_RFC4884 31 184 185 /* IPV6_MTU_DISCOVER values */ 186 #define IPV6_PMTUDISC_DONT 0 187 #define IPV6_PMTUDISC_WANT 1 188 #define IPV6_PMTUDISC_DO 2 189 #define IPV6_PMTUDISC_PROBE 3 190 /* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4 191 * also see comments on IP_PMTUDISC_INTERFACE 192 */ 193 #define IPV6_PMTUDISC_INTERFACE 4 194 /* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to 195 * get fragmented if they exceed the interface mtu 196 */ 197 #define IPV6_PMTUDISC_OMIT 5 198 199 /* Flowlabel */ 200 #define IPV6_FLOWLABEL_MGR 32 201 #define IPV6_FLOWINFO_SEND 33 202 203 #define IPV6_IPSEC_POLICY 34 204 #define IPV6_XFRM_POLICY 35 205 #define IPV6_HDRINCL 36 206 #endif 207 208 /* 209 * Multicast: 210 * Following socket options are shared between IPv4 and IPv6. 211 * 212 * MCAST_JOIN_GROUP 42 213 * MCAST_BLOCK_SOURCE 43 214 * MCAST_UNBLOCK_SOURCE 44 215 * MCAST_LEAVE_GROUP 45 216 * MCAST_JOIN_SOURCE_GROUP 46 217 * MCAST_LEAVE_SOURCE_GROUP 47 218 * MCAST_MSFILTER 48 219 */ 220 221 /* 222 * Advanced API (RFC3542) (1) 223 * 224 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 225 */ 226 227 #define IPV6_RECVPKTINFO 49 228 #define IPV6_PKTINFO 50 229 #define IPV6_RECVHOPLIMIT 51 230 #define IPV6_HOPLIMIT 52 231 #define IPV6_RECVHOPOPTS 53 232 #define IPV6_HOPOPTS 54 233 #define IPV6_RTHDRDSTOPTS 55 234 #define IPV6_RECVRTHDR 56 235 #define IPV6_RTHDR 57 236 #define IPV6_RECVDSTOPTS 58 237 #define IPV6_DSTOPTS 59 238 #define IPV6_RECVPATHMTU 60 239 #define IPV6_PATHMTU 61 240 #define IPV6_DONTFRAG 62 241 #if 0 /* not yet */ 242 #define IPV6_USE_MIN_MTU 63 243 #endif 244 245 /* 246 * Netfilter (1) 247 * 248 * Following socket options are used in ip6_tables; 249 * see include/linux/netfilter_ipv6/ip6_tables.h. 250 * 251 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 252 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 253 */ 254 255 /* 256 * Advanced API (RFC3542) (2) 257 */ 258 #define IPV6_RECVTCLASS 66 259 #define IPV6_TCLASS 67 260 261 /* 262 * Netfilter (2) 263 * 264 * Following socket options are used in ip6_tables; 265 * see include/linux/netfilter_ipv6/ip6_tables.h. 266 * 267 * IP6T_SO_GET_REVISION_MATCH 68 268 * IP6T_SO_GET_REVISION_TARGET 69 269 * IP6T_SO_ORIGINAL_DST 80 270 */ 271 272 #define IPV6_AUTOFLOWLABEL 70 273 /* RFC5014: Source address selection */ 274 #define IPV6_ADDR_PREFERENCES 72 275 276 #define IPV6_PREFER_SRC_TMP 0x0001 277 #define IPV6_PREFER_SRC_PUBLIC 0x0002 278 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100 279 #define IPV6_PREFER_SRC_COA 0x0004 280 #define IPV6_PREFER_SRC_HOME 0x0400 281 #define IPV6_PREFER_SRC_CGA 0x0008 282 #define IPV6_PREFER_SRC_NONCGA 0x0800 283 284 /* RFC5082: Generalized Ttl Security Mechanism */ 285 #define IPV6_MINHOPCOUNT 73 286 287 #define IPV6_ORIGDSTADDR 74 288 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR 289 #define IPV6_TRANSPARENT 75 290 #define IPV6_UNICAST_IF 76 291 #define IPV6_RECVFRAGSIZE 77 292 #define IPV6_FREEBIND 78 293 294 /* 295 * Multicast Routing: 296 * see include/uapi/linux/mroute6.h. 297 * 298 * MRT6_BASE 200 299 * ... 300 * MRT6_MAX 301 */ 302 #endif /* _LINUX_IN6_H */