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{ 32 union 33 { 34 __u8 u6_addr8[16]; 35 __be16 u6_addr16[8]; 36 __be32 u6_addr32[4]; 37 } in6_u; 38#define s6_addr in6_u.u6_addr8 39#define s6_addr16 in6_u.u6_addr16 40#define s6_addr32 in6_u.u6_addr32 41}; 42 43/* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553 44 * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined 45 * in network byte order, not in host byte order as are the IPv4 equivalents 46 */ 47extern const struct in6_addr in6addr_any; 48#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } 49extern const struct in6_addr in6addr_loopback; 50#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 51 52struct sockaddr_in6 { 53 unsigned short int sin6_family; /* AF_INET6 */ 54 __be16 sin6_port; /* Transport layer port # */ 55 __be32 sin6_flowinfo; /* IPv6 flow information */ 56 struct in6_addr sin6_addr; /* IPv6 address */ 57 __u32 sin6_scope_id; /* scope id (new in RFC2553) */ 58}; 59 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 68#define ipv6mr_acaddr ipv6mr_multiaddr 69 70struct in6_flowlabel_req 71{ 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 90#define IPV6_FL_S_NONE 0 91#define IPV6_FL_S_EXCL 1 92#define IPV6_FL_S_PROCESS 2 93#define IPV6_FL_S_USER 3 94#define IPV6_FL_S_ANY 255 95 96 97/* 98 * Bitmask constant declarations to help applications select out the 99 * flow label and priority fields. 100 * 101 * Note that this are in host byte order while the flowinfo field of 102 * sockaddr_in6 is in network byte order. 103 */ 104 105#define IPV6_FLOWINFO_FLOWLABEL 0x000fffff 106#define IPV6_FLOWINFO_PRIORITY 0x0ff00000 107 108/* These defintions are obsolete */ 109#define IPV6_PRIORITY_UNCHARACTERIZED 0x0000 110#define IPV6_PRIORITY_FILLER 0x0100 111#define IPV6_PRIORITY_UNATTENDED 0x0200 112#define IPV6_PRIORITY_RESERVED1 0x0300 113#define IPV6_PRIORITY_BULK 0x0400 114#define IPV6_PRIORITY_RESERVED2 0x0500 115#define IPV6_PRIORITY_INTERACTIVE 0x0600 116#define IPV6_PRIORITY_CONTROL 0x0700 117#define IPV6_PRIORITY_8 0x0800 118#define IPV6_PRIORITY_9 0x0900 119#define IPV6_PRIORITY_10 0x0a00 120#define IPV6_PRIORITY_11 0x0b00 121#define IPV6_PRIORITY_12 0x0c00 122#define IPV6_PRIORITY_13 0x0d00 123#define IPV6_PRIORITY_14 0x0e00 124#define IPV6_PRIORITY_15 0x0f00 125 126/* 127 * IPV6 extension headers 128 */ 129#define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */ 130#define IPPROTO_ROUTING 43 /* IPv6 routing header */ 131#define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */ 132#define IPPROTO_ICMPV6 58 /* ICMPv6 */ 133#define IPPROTO_NONE 59 /* IPv6 no next header */ 134#define IPPROTO_DSTOPTS 60 /* IPv6 destination options */ 135#define IPPROTO_MH 135 /* IPv6 mobility header */ 136 137/* 138 * IPv6 TLV options. 139 */ 140#define IPV6_TLV_PAD0 0 141#define IPV6_TLV_PADN 1 142#define IPV6_TLV_ROUTERALERT 5 143#define IPV6_TLV_JUMBO 194 144#define IPV6_TLV_HAO 201 /* home address option */ 145 146/* 147 * IPV6 socket options 148 */ 149 150#define IPV6_ADDRFORM 1 151#define IPV6_2292PKTINFO 2 152#define IPV6_2292HOPOPTS 3 153#define IPV6_2292DSTOPTS 4 154#define IPV6_2292RTHDR 5 155#define IPV6_2292PKTOPTIONS 6 156#define IPV6_CHECKSUM 7 157#define IPV6_2292HOPLIMIT 8 158#define IPV6_NEXTHOP 9 159#define IPV6_AUTHHDR 10 /* obsolete */ 160#define IPV6_FLOWINFO 11 161 162#define IPV6_UNICAST_HOPS 16 163#define IPV6_MULTICAST_IF 17 164#define IPV6_MULTICAST_HOPS 18 165#define IPV6_MULTICAST_LOOP 19 166#define IPV6_ADD_MEMBERSHIP 20 167#define IPV6_DROP_MEMBERSHIP 21 168#define IPV6_ROUTER_ALERT 22 169#define IPV6_MTU_DISCOVER 23 170#define IPV6_MTU 24 171#define IPV6_RECVERR 25 172#define IPV6_V6ONLY 26 173#define IPV6_JOIN_ANYCAST 27 174#define IPV6_LEAVE_ANYCAST 28 175 176/* IPV6_MTU_DISCOVER values */ 177#define IPV6_PMTUDISC_DONT 0 178#define IPV6_PMTUDISC_WANT 1 179#define IPV6_PMTUDISC_DO 2 180#define IPV6_PMTUDISC_PROBE 3 181 182/* Flowlabel */ 183#define IPV6_FLOWLABEL_MGR 32 184#define IPV6_FLOWINFO_SEND 33 185 186#define IPV6_IPSEC_POLICY 34 187#define IPV6_XFRM_POLICY 35 188 189/* 190 * Multicast: 191 * Following socket options are shared between IPv4 and IPv6. 192 * 193 * MCAST_JOIN_GROUP 42 194 * MCAST_BLOCK_SOURCE 43 195 * MCAST_UNBLOCK_SOURCE 44 196 * MCAST_LEAVE_GROUP 45 197 * MCAST_JOIN_SOURCE_GROUP 46 198 * MCAST_LEAVE_SOURCE_GROUP 47 199 * MCAST_MSFILTER 48 200 */ 201 202/* 203 * Advanced API (RFC3542) (1) 204 * 205 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 206 */ 207 208#define IPV6_RECVPKTINFO 49 209#define IPV6_PKTINFO 50 210#define IPV6_RECVHOPLIMIT 51 211#define IPV6_HOPLIMIT 52 212#define IPV6_RECVHOPOPTS 53 213#define IPV6_HOPOPTS 54 214#define IPV6_RTHDRDSTOPTS 55 215#define IPV6_RECVRTHDR 56 216#define IPV6_RTHDR 57 217#define IPV6_RECVDSTOPTS 58 218#define IPV6_DSTOPTS 59 219 220/* 221 * Netfilter (1) 222 * 223 * Following socket options are used in ip6_tables; 224 * see include/linux/netfilter_ipv6/ip6_tables.h. 225 * 226 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 227 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 228 */ 229 230/* 231 * Advanced API (RFC3542) (2) 232 */ 233#define IPV6_RECVTCLASS 66 234#define IPV6_TCLASS 67 235 236/* 237 * Netfilter (2) 238 * 239 * Following socket options are used in ip6_tables; 240 * see include/linux/netfilter_ipv6/ip6_tables.h. 241 * 242 * IP6T_SO_GET_REVISION_MATCH 68 243 * IP6T_SO_GET_REVISION_TARGET 69 244 */ 245 246#endif 247