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 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_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