1/* 2 * Types and definitions for AF_INET6 3 * Linux INET6 implementation 4 * 5 * Authors: 6 * Pedro Roque <roque@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 26/* 27 * IPv6 address structure 28 */ 29 30struct in6_addr { 31 union { 32 __u8 u6_addr8[16]; 33 __be16 u6_addr16[8]; 34 __be32 u6_addr32[4]; 35 } in6_u; 36#define s6_addr in6_u.u6_addr8 37#define s6_addr16 in6_u.u6_addr16 38#define s6_addr32 in6_u.u6_addr32 39}; 40 41/* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553 42 * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined 43 * in network byte order, not in host byte order as are the IPv4 equivalents 44 */ 45 46struct sockaddr_in6 { 47 unsigned short int sin6_family; /* AF_INET6 */ 48 __be16 sin6_port; /* Transport layer port # */ 49 __be32 sin6_flowinfo; /* IPv6 flow information */ 50 struct in6_addr sin6_addr; /* IPv6 address */ 51 __u32 sin6_scope_id; /* scope id (new in RFC2553) */ 52}; 53 54struct ipv6_mreq { 55 /* IPv6 multicast address of group */ 56 struct in6_addr ipv6mr_multiaddr; 57 58 /* local IPv6 address of interface */ 59 int ipv6mr_ifindex; 60}; 61 62#define ipv6mr_acaddr ipv6mr_multiaddr 63 64struct in6_flowlabel_req { 65 struct in6_addr flr_dst; 66 __be32 flr_label; 67 __u8 flr_action; 68 __u8 flr_share; 69 __u16 flr_flags; 70 __u16 flr_expires; 71 __u16 flr_linger; 72 __u32 __flr_pad; 73 /* Options in format of IPV6_PKTOPTIONS */ 74}; 75 76#define IPV6_FL_A_GET 0 77#define IPV6_FL_A_PUT 1 78#define IPV6_FL_A_RENEW 2 79 80#define IPV6_FL_F_CREATE 1 81#define IPV6_FL_F_EXCL 2 82 83#define IPV6_FL_S_NONE 0 84#define IPV6_FL_S_EXCL 1 85#define IPV6_FL_S_PROCESS 2 86#define IPV6_FL_S_USER 3 87#define IPV6_FL_S_ANY 255 88 89 90/* 91 * Bitmask constant declarations to help applications select out the 92 * flow label and priority fields. 93 * 94 * Note that this are in host byte order while the flowinfo field of 95 * sockaddr_in6 is in network byte order. 96 */ 97 98#define IPV6_FLOWINFO_FLOWLABEL 0x000fffff 99#define IPV6_FLOWINFO_PRIORITY 0x0ff00000 100 101/* These definitions are obsolete */ 102#define IPV6_PRIORITY_UNCHARACTERIZED 0x0000 103#define IPV6_PRIORITY_FILLER 0x0100 104#define IPV6_PRIORITY_UNATTENDED 0x0200 105#define IPV6_PRIORITY_RESERVED1 0x0300 106#define IPV6_PRIORITY_BULK 0x0400 107#define IPV6_PRIORITY_RESERVED2 0x0500 108#define IPV6_PRIORITY_INTERACTIVE 0x0600 109#define IPV6_PRIORITY_CONTROL 0x0700 110#define IPV6_PRIORITY_8 0x0800 111#define IPV6_PRIORITY_9 0x0900 112#define IPV6_PRIORITY_10 0x0a00 113#define IPV6_PRIORITY_11 0x0b00 114#define IPV6_PRIORITY_12 0x0c00 115#define IPV6_PRIORITY_13 0x0d00 116#define IPV6_PRIORITY_14 0x0e00 117#define IPV6_PRIORITY_15 0x0f00 118 119/* 120 * IPV6 extension headers 121 */ 122#define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */ 123#define IPPROTO_ROUTING 43 /* IPv6 routing header */ 124#define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */ 125#define IPPROTO_ICMPV6 58 /* ICMPv6 */ 126#define IPPROTO_NONE 59 /* IPv6 no next header */ 127#define IPPROTO_DSTOPTS 60 /* IPv6 destination options */ 128#define IPPROTO_MH 135 /* IPv6 mobility header */ 129 130/* 131 * IPv6 TLV options. 132 */ 133#define IPV6_TLV_PAD0 0 134#define IPV6_TLV_PADN 1 135#define IPV6_TLV_ROUTERALERT 5 136#define IPV6_TLV_JUMBO 194 137#define IPV6_TLV_HAO 201 /* home address option */ 138 139/* 140 * IPV6 socket options 141 */ 142 143#define IPV6_ADDRFORM 1 144#define IPV6_2292PKTINFO 2 145#define IPV6_2292HOPOPTS 3 146#define IPV6_2292DSTOPTS 4 147#define IPV6_2292RTHDR 5 148#define IPV6_2292PKTOPTIONS 6 149#define IPV6_CHECKSUM 7 150#define IPV6_2292HOPLIMIT 8 151#define IPV6_NEXTHOP 9 152#define IPV6_AUTHHDR 10 /* obsolete */ 153#define IPV6_FLOWINFO 11 154 155#define IPV6_UNICAST_HOPS 16 156#define IPV6_MULTICAST_IF 17 157#define IPV6_MULTICAST_HOPS 18 158#define IPV6_MULTICAST_LOOP 19 159#define IPV6_ADD_MEMBERSHIP 20 160#define IPV6_DROP_MEMBERSHIP 21 161#define IPV6_ROUTER_ALERT 22 162#define IPV6_MTU_DISCOVER 23 163#define IPV6_MTU 24 164#define IPV6_RECVERR 25 165#define IPV6_V6ONLY 26 166#define IPV6_JOIN_ANYCAST 27 167#define IPV6_LEAVE_ANYCAST 28 168 169/* IPV6_MTU_DISCOVER values */ 170#define IPV6_PMTUDISC_DONT 0 171#define IPV6_PMTUDISC_WANT 1 172#define IPV6_PMTUDISC_DO 2 173#define IPV6_PMTUDISC_PROBE 3 174 175/* Flowlabel */ 176#define IPV6_FLOWLABEL_MGR 32 177#define IPV6_FLOWINFO_SEND 33 178 179#define IPV6_IPSEC_POLICY 34 180#define IPV6_XFRM_POLICY 35 181 182/* 183 * Multicast: 184 * Following socket options are shared between IPv4 and IPv6. 185 * 186 * MCAST_JOIN_GROUP 42 187 * MCAST_BLOCK_SOURCE 43 188 * MCAST_UNBLOCK_SOURCE 44 189 * MCAST_LEAVE_GROUP 45 190 * MCAST_JOIN_SOURCE_GROUP 46 191 * MCAST_LEAVE_SOURCE_GROUP 47 192 * MCAST_MSFILTER 48 193 */ 194 195/* 196 * Advanced API (RFC3542) (1) 197 * 198 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 199 */ 200 201#define IPV6_RECVPKTINFO 49 202#define IPV6_PKTINFO 50 203#define IPV6_RECVHOPLIMIT 51 204#define IPV6_HOPLIMIT 52 205#define IPV6_RECVHOPOPTS 53 206#define IPV6_HOPOPTS 54 207#define IPV6_RTHDRDSTOPTS 55 208#define IPV6_RECVRTHDR 56 209#define IPV6_RTHDR 57 210#define IPV6_RECVDSTOPTS 58 211#define IPV6_DSTOPTS 59 212#define IPV6_RECVPATHMTU 60 213#define IPV6_PATHMTU 61 214#define IPV6_DONTFRAG 62 215#if 0 /* not yet */ 216#define IPV6_USE_MIN_MTU 63 217#endif 218 219/* 220 * Netfilter (1) 221 * 222 * Following socket options are used in ip6_tables; 223 * see include/linux/netfilter_ipv6/ip6_tables.h. 224 * 225 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 226 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 227 */ 228 229/* 230 * Advanced API (RFC3542) (2) 231 */ 232#define IPV6_RECVTCLASS 66 233#define IPV6_TCLASS 67 234 235/* 236 * Netfilter (2) 237 * 238 * Following socket options are used in ip6_tables; 239 * see include/linux/netfilter_ipv6/ip6_tables.h. 240 * 241 * IP6T_SO_GET_REVISION_MATCH 68 242 * IP6T_SO_GET_REVISION_TARGET 69 243 */ 244 245/* RFC5014: Source address selection */ 246#define IPV6_ADDR_PREFERENCES 72 247 248#define IPV6_PREFER_SRC_TMP 0x0001 249#define IPV6_PREFER_SRC_PUBLIC 0x0002 250#define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100 251#define IPV6_PREFER_SRC_COA 0x0004 252#define IPV6_PREFER_SRC_HOME 0x0400 253#define IPV6_PREFER_SRC_CGA 0x0008 254#define IPV6_PREFER_SRC_NONCGA 0x0800 255 256/* RFC5082: Generalized Ttl Security Mechanism */ 257#define IPV6_MINHOPCOUNT 73 258 259/* 260 * Multicast Routing: 261 * see include/linux/mroute6.h. 262 * 263 * MRT6_INIT 200 264 * MRT6_DONE 201 265 * MRT6_ADD_MIF 202 266 * MRT6_DEL_MIF 203 267 * MRT6_ADD_MFC 204 268 * MRT6_DEL_MFC 205 269 * MRT6_VERSION 206 270 * MRT6_ASSERT 207 271 * MRT6_PIM 208 272 * (reserved) 209 273 */ 274#endif 275