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 30 struct in6_addr 31 { 32 union 33 { 34 __u8 u6_addr8[16]; 35 __u16 u6_addr16[8]; 36 __u32 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 */ 47 #if 0 48 extern const struct in6_addr in6addr_any; 49 #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } 50 #endif 51 extern const struct in6_addr in6addr_loopback; 52 #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 53 54 struct sockaddr_in6 { 55 unsigned short int sin6_family; /* AF_INET6 */ 56 __u16 sin6_port; /* Transport layer port # */ 57 __u32 sin6_flowinfo; /* IPv6 flow information */ 58 struct in6_addr sin6_addr; /* IPv6 address */ 59 __u32 sin6_scope_id; /* scope id (new in RFC2553) */ 60 }; 61 62 struct ipv6_mreq { 63 /* IPv6 multicast address of group */ 64 struct in6_addr ipv6mr_multiaddr; 65 66 /* local IPv6 address of interface */ 67 int ipv6mr_ifindex; 68 }; 69 70 #define ipv6mr_acaddr ipv6mr_multiaddr 71 72 struct in6_flowlabel_req 73 { 74 struct in6_addr flr_dst; 75 __u32 flr_label; 76 __u8 flr_action; 77 __u8 flr_share; 78 __u16 flr_flags; 79 __u16 flr_expires; 80 __u16 flr_linger; 81 __u32 __flr_pad; 82 /* Options in format of IPV6_PKTOPTIONS */ 83 }; 84 85 #define IPV6_FL_A_GET 0 86 #define IPV6_FL_A_PUT 1 87 #define IPV6_FL_A_RENEW 2 88 89 #define IPV6_FL_F_CREATE 1 90 #define IPV6_FL_F_EXCL 2 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 defintions 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 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */ 132 #define IPPROTO_ROUTING 43 /* IPv6 routing header */ 133 #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */ 134 #define IPPROTO_ICMPV6 58 /* ICMPv6 */ 135 #define IPPROTO_NONE 59 /* IPv6 no next header */ 136 #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */ 137 138 /* 139 * IPv6 TLV options. 140 */ 141 #define IPV6_TLV_PAD0 0 142 #define IPV6_TLV_PADN 1 143 #define IPV6_TLV_ROUTERALERT 5 144 #define IPV6_TLV_JUMBO 194 145 146 /* 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 2 180 181 /* Flowlabel */ 182 #define IPV6_FLOWLABEL_MGR 32 183 #define IPV6_FLOWINFO_SEND 33 184 185 #define IPV6_IPSEC_POLICY 34 186 #define IPV6_XFRM_POLICY 35 187 188 /* 189 * Multicast: 190 * Following socket options are shared between IPv4 and IPv6. 191 * 192 * MCAST_JOIN_GROUP 42 193 * MCAST_BLOCK_SOURCE 43 194 * MCAST_UNBLOCK_SOURCE 44 195 * MCAST_LEAVE_GROUP 45 196 * MCAST_JOIN_SOURCE_GROUP 46 197 * MCAST_LEAVE_SOURCE_GROUP 47 198 * MCAST_MSFILTER 48 199 */ 200 201 /* 202 * Advanced API (RFC3542) (1) 203 * 204 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 205 */ 206 207 #define IPV6_RECVPKTINFO 49 208 #define IPV6_PKTINFO 50 209 #define IPV6_RECVHOPLIMIT 51 210 #define IPV6_HOPLIMIT 52 211 #define IPV6_RECVHOPOPTS 53 212 #define IPV6_HOPOPTS 54 213 #define IPV6_RTHDRDSTOPTS 55 214 #define IPV6_RECVRTHDR 56 215 #define IPV6_RTHDR 57 216 #define IPV6_RECVDSTOPTS 58 217 #define IPV6_DSTOPTS 59 218 #if 0 /* not yet */ 219 #define IPV6_RECVPATHMTU 60 220 #define IPV6_PATHMTU 61 221 #define IPV6_DONTFRAG 62 222 #define IPV6_USE_MIN_MTU 63 223 #endif 224 225 /* 226 * Netfilter 227 * 228 * Following socket options are used in ip6_tables; 229 * see include/linux/netfilter_ipv6/ip6_tables.h. 230 * 231 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 232 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 233 */ 234 235 /* 236 * Advanced API (RFC3542) (2) 237 */ 238 #define IPV6_RECVTCLASS 66 239 #define IPV6_TCLASS 67 240 241 #endif 242