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#include <linux/libc-compat.h> 26 27/* 28 * IPv6 address structure 29 */ 30 31#if __UAPI_DEF_IN6_ADDR 32struct in6_addr { 33 union { 34 __u8 u6_addr8[16]; 35#if __UAPI_DEF_IN6_ADDR_ALT 36 __be16 u6_addr16[8]; 37 __be32 u6_addr32[4]; 38#endif 39 } in6_u; 40#define s6_addr in6_u.u6_addr8 41#if __UAPI_DEF_IN6_ADDR_ALT 42#define s6_addr16 in6_u.u6_addr16 43#define s6_addr32 in6_u.u6_addr32 44#endif 45}; 46#endif /* __UAPI_DEF_IN6_ADDR */ 47 48#if __UAPI_DEF_SOCKADDR_IN6 49struct sockaddr_in6 { 50 unsigned short int sin6_family; /* AF_INET6 */ 51 __be16 sin6_port; /* Transport layer port # */ 52 __be32 sin6_flowinfo; /* IPv6 flow information */ 53 struct in6_addr sin6_addr; /* IPv6 address */ 54 __u32 sin6_scope_id; /* scope id (new in RFC2553) */ 55}; 56#endif /* __UAPI_DEF_SOCKADDR_IN6 */ 57 58#if __UAPI_DEF_IPV6_MREQ 59struct ipv6_mreq { 60 /* IPv6 multicast address of group */ 61 struct in6_addr ipv6mr_multiaddr; 62 63 /* local IPv6 address of interface */ 64 int ipv6mr_ifindex; 65}; 66#endif /* __UAPI_DEF_IVP6_MREQ */ 67 68#define ipv6mr_acaddr ipv6mr_multiaddr 69 70struct in6_flowlabel_req { 71 struct in6_addr flr_dst; 72 __be32 flr_label; 73 __u8 flr_action; 74 __u8 flr_share; 75 __u16 flr_flags; 76 __u16 flr_expires; 77 __u16 flr_linger; 78 __u32 __flr_pad; 79 /* Options in format of IPV6_PKTOPTIONS */ 80}; 81 82#define IPV6_FL_A_GET 0 83#define IPV6_FL_A_PUT 1 84#define IPV6_FL_A_RENEW 2 85 86#define IPV6_FL_F_CREATE 1 87#define IPV6_FL_F_EXCL 2 88#define IPV6_FL_F_REFLECT 4 89#define IPV6_FL_F_REMOTE 8 90 91#define IPV6_FL_S_NONE 0 92#define IPV6_FL_S_EXCL 1 93#define IPV6_FL_S_PROCESS 2 94#define IPV6_FL_S_USER 3 95#define IPV6_FL_S_ANY 255 96 97 98/* 99 * Bitmask constant declarations to help applications select out the 100 * flow label and priority fields. 101 * 102 * Note that this are in host byte order while the flowinfo field of 103 * sockaddr_in6 is in network byte order. 104 */ 105 106#define IPV6_FLOWINFO_FLOWLABEL 0x000fffff 107#define IPV6_FLOWINFO_PRIORITY 0x0ff00000 108 109/* These definitions are obsolete */ 110#define IPV6_PRIORITY_UNCHARACTERIZED 0x0000 111#define IPV6_PRIORITY_FILLER 0x0100 112#define IPV6_PRIORITY_UNATTENDED 0x0200 113#define IPV6_PRIORITY_RESERVED1 0x0300 114#define IPV6_PRIORITY_BULK 0x0400 115#define IPV6_PRIORITY_RESERVED2 0x0500 116#define IPV6_PRIORITY_INTERACTIVE 0x0600 117#define IPV6_PRIORITY_CONTROL 0x0700 118#define IPV6_PRIORITY_8 0x0800 119#define IPV6_PRIORITY_9 0x0900 120#define IPV6_PRIORITY_10 0x0a00 121#define IPV6_PRIORITY_11 0x0b00 122#define IPV6_PRIORITY_12 0x0c00 123#define IPV6_PRIORITY_13 0x0d00 124#define IPV6_PRIORITY_14 0x0e00 125#define IPV6_PRIORITY_15 0x0f00 126 127/* 128 * IPV6 extension headers 129 */ 130#if __UAPI_DEF_IPPROTO_V6 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#define IPPROTO_MH 135 /* IPv6 mobility header */ 138#endif /* __UAPI_DEF_IPPROTO_V6 */ 139 140/* 141 * IPv6 TLV options. 142 */ 143#define IPV6_TLV_PAD1 0 144#define IPV6_TLV_PADN 1 145#define IPV6_TLV_ROUTERALERT 5 146#define IPV6_TLV_JUMBO 194 147#define IPV6_TLV_HAO 201 /* home address option */ 148 149/* 150 * IPV6 socket options 151 */ 152#if __UAPI_DEF_IPV6_OPTIONS 153#define IPV6_ADDRFORM 1 154#define IPV6_2292PKTINFO 2 155#define IPV6_2292HOPOPTS 3 156#define IPV6_2292DSTOPTS 4 157#define IPV6_2292RTHDR 5 158#define IPV6_2292PKTOPTIONS 6 159#define IPV6_CHECKSUM 7 160#define IPV6_2292HOPLIMIT 8 161#define IPV6_NEXTHOP 9 162#define IPV6_AUTHHDR 10 /* obsolete */ 163#define IPV6_FLOWINFO 11 164 165#define IPV6_UNICAST_HOPS 16 166#define IPV6_MULTICAST_IF 17 167#define IPV6_MULTICAST_HOPS 18 168#define IPV6_MULTICAST_LOOP 19 169#define IPV6_ADD_MEMBERSHIP 20 170#define IPV6_DROP_MEMBERSHIP 21 171#define IPV6_ROUTER_ALERT 22 172#define IPV6_MTU_DISCOVER 23 173#define IPV6_MTU 24 174#define IPV6_RECVERR 25 175#define IPV6_V6ONLY 26 176#define IPV6_JOIN_ANYCAST 27 177#define IPV6_LEAVE_ANYCAST 28 178 179/* IPV6_MTU_DISCOVER values */ 180#define IPV6_PMTUDISC_DONT 0 181#define IPV6_PMTUDISC_WANT 1 182#define IPV6_PMTUDISC_DO 2 183#define IPV6_PMTUDISC_PROBE 3 184/* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4 185 * also see comments on IP_PMTUDISC_INTERFACE 186 */ 187#define IPV6_PMTUDISC_INTERFACE 4 188/* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to 189 * get fragmented if they exceed the interface mtu 190 */ 191#define IPV6_PMTUDISC_OMIT 5 192 193/* Flowlabel */ 194#define IPV6_FLOWLABEL_MGR 32 195#define IPV6_FLOWINFO_SEND 33 196 197#define IPV6_IPSEC_POLICY 34 198#define IPV6_XFRM_POLICY 35 199#define IPV6_HDRINCL 36 200#endif 201 202/* 203 * Multicast: 204 * Following socket options are shared between IPv4 and IPv6. 205 * 206 * MCAST_JOIN_GROUP 42 207 * MCAST_BLOCK_SOURCE 43 208 * MCAST_UNBLOCK_SOURCE 44 209 * MCAST_LEAVE_GROUP 45 210 * MCAST_JOIN_SOURCE_GROUP 46 211 * MCAST_LEAVE_SOURCE_GROUP 47 212 * MCAST_MSFILTER 48 213 */ 214 215/* 216 * Advanced API (RFC3542) (1) 217 * 218 * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. 219 */ 220 221#define IPV6_RECVPKTINFO 49 222#define IPV6_PKTINFO 50 223#define IPV6_RECVHOPLIMIT 51 224#define IPV6_HOPLIMIT 52 225#define IPV6_RECVHOPOPTS 53 226#define IPV6_HOPOPTS 54 227#define IPV6_RTHDRDSTOPTS 55 228#define IPV6_RECVRTHDR 56 229#define IPV6_RTHDR 57 230#define IPV6_RECVDSTOPTS 58 231#define IPV6_DSTOPTS 59 232#define IPV6_RECVPATHMTU 60 233#define IPV6_PATHMTU 61 234#define IPV6_DONTFRAG 62 235#if 0 /* not yet */ 236#define IPV6_USE_MIN_MTU 63 237#endif 238 239/* 240 * Netfilter (1) 241 * 242 * Following socket options are used in ip6_tables; 243 * see include/linux/netfilter_ipv6/ip6_tables.h. 244 * 245 * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 246 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 247 */ 248 249/* 250 * Advanced API (RFC3542) (2) 251 */ 252#define IPV6_RECVTCLASS 66 253#define IPV6_TCLASS 67 254 255/* 256 * Netfilter (2) 257 * 258 * Following socket options are used in ip6_tables; 259 * see include/linux/netfilter_ipv6/ip6_tables.h. 260 * 261 * IP6T_SO_GET_REVISION_MATCH 68 262 * IP6T_SO_GET_REVISION_TARGET 69 263 * IP6T_SO_ORIGINAL_DST 80 264 */ 265 266#define IPV6_AUTOFLOWLABEL 70 267/* RFC5014: Source address selection */ 268#define IPV6_ADDR_PREFERENCES 72 269 270#define IPV6_PREFER_SRC_TMP 0x0001 271#define IPV6_PREFER_SRC_PUBLIC 0x0002 272#define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100 273#define IPV6_PREFER_SRC_COA 0x0004 274#define IPV6_PREFER_SRC_HOME 0x0400 275#define IPV6_PREFER_SRC_CGA 0x0008 276#define IPV6_PREFER_SRC_NONCGA 0x0800 277 278/* RFC5082: Generalized Ttl Security Mechanism */ 279#define IPV6_MINHOPCOUNT 73 280 281#define IPV6_ORIGDSTADDR 74 282#define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR 283#define IPV6_TRANSPARENT 75 284#define IPV6_UNICAST_IF 76 285 286/* 287 * Multicast Routing: 288 * see include/uapi/linux/mroute6.h. 289 * 290 * MRT6_BASE 200 291 * ... 292 * MRT6_MAX 293 */ 294#endif /* _LINUX_IN6_H */ 295