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 _UAPI_LINUX_IN6_H 23#define _UAPI_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 33struct 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 50struct 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 60struct 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 71struct 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 /* _UAPI_LINUX_IN6_H */ 303