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#ifdef __KERNEL__ 46extern const struct in6_addr in6addr_any; 47#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } 48extern const struct in6_addr in6addr_loopback; 49#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 50extern const struct in6_addr in6addr_linklocal_allnodes; 51#define IN6ADDR_LINKLOCAL_ALLNODES_INIT \ 52 { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 53extern const struct in6_addr in6addr_linklocal_allrouters; 54#define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \ 55 { { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2 } } } 56#endif 57 58struct sockaddr_in6 { 59 unsigned short int sin6_family; /* AF_INET6 */ 60 __be16 sin6_port; /* Transport layer port # */ 61 __be32 sin6_flowinfo; /* IPv6 flow information */ 62 struct in6_addr sin6_addr; /* IPv6 address */ 63 __u32 sin6_scope_id; /* scope id (new in RFC2553) */ 64}; 65 66struct ipv6_mreq { 67 /* IPv6 multicast address of group */ 68 struct in6_addr ipv6mr_multiaddr; 69 70 /* local IPv6 address of interface */ 71 int ipv6mr_ifindex; 72}; 73 74#define ipv6mr_acaddr ipv6mr_multiaddr 75 76struct in6_flowlabel_req { 77 struct in6_addr flr_dst; 78 __be32 flr_label; 79 __u8 flr_action; 80 __u8 flr_share; 81 __u16 flr_flags; 82 __u16 flr_expires; 83 __u16 flr_linger; 84 __u32 __flr_pad; 85 /* Options in format of IPV6_PKTOPTIONS */ 86}; 87 88#define IPV6_FL_A_GET 0 89#define IPV6_FL_A_PUT 1 90#define IPV6_FL_A_RENEW 2 91 92#define IPV6_FL_F_CREATE 1 93#define IPV6_FL_F_EXCL 2 94 95#define IPV6_FL_S_NONE 0 96#define IPV6_FL_S_EXCL 1 97#define IPV6_FL_S_PROCESS 2 98#define IPV6_FL_S_USER 3 99#define IPV6_FL_S_ANY 255 100 101 102/* 103 * Bitmask constant declarations to help applications select out the 104 * flow label and priority fields. 105 * 106 * Note that this are in host byte order while the flowinfo field of 107 * sockaddr_in6 is in network byte order. 108 */ 109 110#define IPV6_FLOWINFO_FLOWLABEL 0x000fffff 111#define IPV6_FLOWINFO_PRIORITY 0x0ff00000 112 113/* These definitions are obsolete */ 114#define IPV6_PRIORITY_UNCHARACTERIZED 0x0000 115#define IPV6_PRIORITY_FILLER 0x0100 116#define IPV6_PRIORITY_UNATTENDED 0x0200 117#define IPV6_PRIORITY_RESERVED1 0x0300 118#define IPV6_PRIORITY_BULK 0x0400 119#define IPV6_PRIORITY_RESERVED2 0x0500 120#define IPV6_PRIORITY_INTERACTIVE 0x0600 121#define IPV6_PRIORITY_CONTROL 0x0700 122#define IPV6_PRIORITY_8 0x0800 123#define IPV6_PRIORITY_9 0x0900 124#define IPV6_PRIORITY_10 0x0a00 125#define IPV6_PRIORITY_11 0x0b00 126#define IPV6_PRIORITY_12 0x0c00 127#define IPV6_PRIORITY_13 0x0d00 128#define IPV6_PRIORITY_14 0x0e00 129#define IPV6_PRIORITY_15 0x0f00 130 131/* 132 * IPV6 extension headers 133 */ 134#define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */ 135#define IPPROTO_ROUTING 43 /* IPv6 routing header */ 136#define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */ 137#define IPPROTO_ICMPV6 58 /* ICMPv6 */ 138#define IPPROTO_NONE 59 /* IPv6 no next header */ 139#define IPPROTO_DSTOPTS 60 /* IPv6 destination options */ 140#define IPPROTO_MH 135 /* IPv6 mobility header */ 141 142/* 143 * IPv6 TLV options. 144 */ 145#define IPV6_TLV_PAD0 0 146#define IPV6_TLV_PADN 1 147#define IPV6_TLV_ROUTERALERT 5 148#define IPV6_TLV_JUMBO 194 149#define IPV6_TLV_HAO 201 /* home address option */ 150 151/* 152 * IPV6 socket options 153 */ 154 155#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 28 180 181/* IPV6_MTU_DISCOVER values */ 182#define IPV6_PMTUDISC_DONT 0 183#define IPV6_PMTUDISC_WANT 1 184#define IPV6_PMTUDISC_DO 2 185#define IPV6_PMTUDISC_PROBE 3 186 187/* Flowlabel */ 188#define IPV6_FLOWLABEL_MGR 32 189#define IPV6_FLOWINFO_SEND 33 190 191#define IPV6_IPSEC_POLICY 34 192#define IPV6_XFRM_POLICY 35 193 194/* 195 * Multicast: 196 * Following socket options are shared between IPv4 and IPv6. 197 * 198 * MCAST_JOIN_GROUP 42 199 * MCAST_BLOCK_SOURCE 43 200 * MCAST_UNBLOCK_SOURCE 44 201 * MCAST_LEAVE_GROUP 45 202 * MCAST_JOIN_SOURCE_GROUP 46 203 * MCAST_LEAVE_SOURCE_GROUP 47 204 * MCAST_MSFILTER 48 205 */ 206 207/* 208 * Advanced API (RFC3542) (1) 209 * 210 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 211 */ 212 213#define IPV6_RECVPKTINFO 49 214#define IPV6_PKTINFO 50 215#define IPV6_RECVHOPLIMIT 51 216#define IPV6_HOPLIMIT 52 217#define IPV6_RECVHOPOPTS 53 218#define IPV6_HOPOPTS 54 219#define IPV6_RTHDRDSTOPTS 55 220#define IPV6_RECVRTHDR 56 221#define IPV6_RTHDR 57 222#define IPV6_RECVDSTOPTS 58 223#define IPV6_DSTOPTS 59 224#define IPV6_RECVPATHMTU 60 225#define IPV6_PATHMTU 61 226#define IPV6_DONTFRAG 62 227 228/* 229 * Netfilter (1) 230 * 231 * Following socket options are used in ip6_tables; 232 * see include/linux/netfilter_ipv6/ip6_tables.h. 233 * 234 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 235 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 236 */ 237 238/* 239 * Advanced API (RFC3542) (2) 240 */ 241#define IPV6_RECVTCLASS 66 242#define IPV6_TCLASS 67 243 244/* 245 * Netfilter (2) 246 * 247 * Following socket options are used in ip6_tables; 248 * see include/linux/netfilter_ipv6/ip6_tables.h. 249 * 250 * IP6T_SO_GET_REVISION_MATCH 68 251 * IP6T_SO_GET_REVISION_TARGET 69 252 */ 253 254/* RFC5014: Source address selection */ 255#define IPV6_ADDR_PREFERENCES 72 256 257#define IPV6_PREFER_SRC_TMP 0x0001 258#define IPV6_PREFER_SRC_PUBLIC 0x0002 259#define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100 260#define IPV6_PREFER_SRC_COA 0x0004 261#define IPV6_PREFER_SRC_HOME 0x0400 262#define IPV6_PREFER_SRC_CGA 0x0008 263#define IPV6_PREFER_SRC_NONCGA 0x0800 264 265/* RFC5082: Generalized Ttl Security Mechanism */ 266#define IPV6_MINHOPCOUNT 73 267 268/* 269 * Multicast Routing: 270 * see include/linux/mroute6.h. 271 * 272 * MRT6_INIT 200 273 * MRT6_DONE 201 274 * MRT6_ADD_MIF 202 275 * MRT6_DEL_MIF 203 276 * MRT6_ADD_MFC 204 277 * MRT6_DEL_MFC 205 278 * MRT6_VERSION 206 279 * MRT6_ASSERT 207 280 * MRT6_PIM 208 281 * (reserved) 209 282 */ 283#endif 284