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in6.h
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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ /* * Types and definitions for AF_INET6 * Linux INET6 implementation * * Authors: * Pedro Roque <roque@di.fc.ul.pt> * * Sources: * IPv6 Program Interfaces for BSD Systems * <draft-ietf-ipngwg-bsd-api-05.txt> * * Advanced Sockets API for IPv6 * <draft-stevens-advanced-api-00.txt> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _LINUX_IN6_H #define _LINUX_IN6_H #include <linux/types.h> #include <linux/libc-compat.h> /* * IPv6 address structure */ #if __UAPI_DEF_IN6_ADDR struct in6_addr { union { __u8 u6_addr8[16]; #if __UAPI_DEF_IN6_ADDR_ALT __be16 u6_addr16[8]; __be32 u6_addr32[4]; #endif } in6_u; #define s6_addr in6_u.u6_addr8 #if __UAPI_DEF_IN6_ADDR_ALT #define s6_addr16 in6_u.u6_addr16 #define s6_addr32 in6_u.u6_addr32 #endif }; #endif /* __UAPI_DEF_IN6_ADDR */ #if __UAPI_DEF_SOCKADDR_IN6 struct sockaddr_in6 { unsigned short int sin6_family; /* AF_INET6 */ __be16 sin6_port; /* Transport layer port # */ __be32 sin6_flowinfo; /* IPv6 flow information */ struct in6_addr sin6_addr; /* IPv6 address */ __u32 sin6_scope_id; /* scope id (new in RFC2553) */ }; #endif /* __UAPI_DEF_SOCKADDR_IN6 */ #if __UAPI_DEF_IPV6_MREQ struct ipv6_mreq { /* IPv6 multicast address of group */ struct in6_addr ipv6mr_multiaddr; /* local IPv6 address of interface */ int ipv6mr_ifindex; }; #endif /* __UAPI_DEF_IVP6_MREQ */ #define ipv6mr_acaddr ipv6mr_multiaddr struct in6_flowlabel_req { struct in6_addr flr_dst; __be32 flr_label; __u8 flr_action; __u8 flr_share; __u16 flr_flags; __u16 flr_expires; __u16 flr_linger; __u32 __flr_pad; /* Options in format of IPV6_PKTOPTIONS */ }; #define IPV6_FL_A_GET 0 #define IPV6_FL_A_PUT 1 #define IPV6_FL_A_RENEW 2 #define IPV6_FL_F_CREATE 1 #define IPV6_FL_F_EXCL 2 #define IPV6_FL_F_REFLECT 4 #define IPV6_FL_F_REMOTE 8 #define IPV6_FL_S_NONE 0 #define IPV6_FL_S_EXCL 1 #define IPV6_FL_S_PROCESS 2 #define IPV6_FL_S_USER 3 #define IPV6_FL_S_ANY 255 /* * Bitmask constant declarations to help applications select out the * flow label and priority fields. * * Note that this are in host byte order while the flowinfo field of * sockaddr_in6 is in network byte order. */ #define IPV6_FLOWINFO_FLOWLABEL 0x000fffff #define IPV6_FLOWINFO_PRIORITY 0x0ff00000 /* These definitions are obsolete */ #define IPV6_PRIORITY_UNCHARACTERIZED 0x0000 #define IPV6_PRIORITY_FILLER 0x0100 #define IPV6_PRIORITY_UNATTENDED 0x0200 #define IPV6_PRIORITY_RESERVED1 0x0300 #define IPV6_PRIORITY_BULK 0x0400 #define IPV6_PRIORITY_RESERVED2 0x0500 #define IPV6_PRIORITY_INTERACTIVE 0x0600 #define IPV6_PRIORITY_CONTROL 0x0700 #define IPV6_PRIORITY_8 0x0800 #define IPV6_PRIORITY_9 0x0900 #define IPV6_PRIORITY_10 0x0a00 #define IPV6_PRIORITY_11 0x0b00 #define IPV6_PRIORITY_12 0x0c00 #define IPV6_PRIORITY_13 0x0d00 #define IPV6_PRIORITY_14 0x0e00 #define IPV6_PRIORITY_15 0x0f00 /* * IPV6 extension headers */ #if __UAPI_DEF_IPPROTO_V6 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */ #define IPPROTO_ROUTING 43 /* IPv6 routing header */ #define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */ #define IPPROTO_ICMPV6 58 /* ICMPv6 */ #define IPPROTO_NONE 59 /* IPv6 no next header */ #define IPPROTO_DSTOPTS 60 /* IPv6 destination options */ #define IPPROTO_MH 135 /* IPv6 mobility header */ #endif /* __UAPI_DEF_IPPROTO_V6 */ /* * IPv6 TLV options. */ #define IPV6_TLV_PAD1 0 #define IPV6_TLV_PADN 1 #define IPV6_TLV_ROUTERALERT 5 #define IPV6_TLV_CALIPSO 7 /* RFC 5570 */ #define IPV6_TLV_IOAM 49 /* RFC 9486 */ #define IPV6_TLV_JUMBO 194 #define IPV6_TLV_HAO 201 /* home address option */ /* * IPV6 socket options */ #define IPV6_ADDRFORM 1 #define IPV6_2292PKTINFO 2 #define IPV6_2292HOPOPTS 3 #define IPV6_2292DSTOPTS 4 #define IPV6_2292RTHDR 5 #define IPV6_2292PKTOPTIONS 6 #define IPV6_CHECKSUM 7 #define IPV6_2292HOPLIMIT 8 #define IPV6_NEXTHOP 9 #define IPV6_AUTHHDR 10 /* obsolete */ #define IPV6_FLOWINFO 11 #define IPV6_UNICAST_HOPS 16 #define IPV6_MULTICAST_IF 17 #define IPV6_MULTICAST_HOPS 18 #define IPV6_MULTICAST_LOOP 19 #if __UAPI_DEF_IPV6_OPTIONS #define IPV6_ADD_MEMBERSHIP 20 #define IPV6_DROP_MEMBERSHIP 21 #endif #define IPV6_ROUTER_ALERT 22 #define IPV6_MTU_DISCOVER 23 #define IPV6_MTU 24 #define IPV6_RECVERR 25 #define IPV6_V6ONLY 26 #define IPV6_JOIN_ANYCAST 27 #define IPV6_LEAVE_ANYCAST 28 #define IPV6_MULTICAST_ALL 29 #define IPV6_ROUTER_ALERT_ISOLATE 30 #define IPV6_RECVERR_RFC4884 31 /* IPV6_MTU_DISCOVER values */ #define IPV6_PMTUDISC_DONT 0 #define IPV6_PMTUDISC_WANT 1 #define IPV6_PMTUDISC_DO 2 #define IPV6_PMTUDISC_PROBE 3 /* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4 * also see comments on IP_PMTUDISC_INTERFACE */ #define IPV6_PMTUDISC_INTERFACE 4 /* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to * get fragmented if they exceed the interface mtu */ #define IPV6_PMTUDISC_OMIT 5 /* Flowlabel */ #define IPV6_FLOWLABEL_MGR 32 #define IPV6_FLOWINFO_SEND 33 #define IPV6_IPSEC_POLICY 34 #define IPV6_XFRM_POLICY 35 #define IPV6_HDRINCL 36 /* * Multicast: * Following socket options are shared between IPv4 and IPv6. * * MCAST_JOIN_GROUP 42 * MCAST_BLOCK_SOURCE 43 * MCAST_UNBLOCK_SOURCE 44 * MCAST_LEAVE_GROUP 45 * MCAST_JOIN_SOURCE_GROUP 46 * MCAST_LEAVE_SOURCE_GROUP 47 * MCAST_MSFILTER 48 */ /* * Advanced API (RFC3542) (1) * * Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c. */ #define IPV6_RECVPKTINFO 49 #define IPV6_PKTINFO 50 #define IPV6_RECVHOPLIMIT 51 #define IPV6_HOPLIMIT 52 #define IPV6_RECVHOPOPTS 53 #define IPV6_HOPOPTS 54 #define IPV6_RTHDRDSTOPTS 55 #define IPV6_RECVRTHDR 56 #define IPV6_RTHDR 57 #define IPV6_RECVDSTOPTS 58 #define IPV6_DSTOPTS 59 #define IPV6_RECVPATHMTU 60 #define IPV6_PATHMTU 61 #define IPV6_DONTFRAG 62 #if 0 /* not yet */ #define IPV6_USE_MIN_MTU 63 #endif /* * Netfilter (1) * * Following socket options are used in ip6_tables; * see include/linux/netfilter_ipv6/ip6_tables.h. * * IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64 * IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65 */ /* * Advanced API (RFC3542) (2) */ #define IPV6_RECVTCLASS 66 #define IPV6_TCLASS 67 /* * Netfilter (2) * * Following socket options are used in ip6_tables; * see include/linux/netfilter_ipv6/ip6_tables.h. * * IP6T_SO_GET_REVISION_MATCH 68 * IP6T_SO_GET_REVISION_TARGET 69 * IP6T_SO_ORIGINAL_DST 80 */ #define IPV6_AUTOFLOWLABEL 70 /* RFC5014: Source address selection */ #define IPV6_ADDR_PREFERENCES 72 #define IPV6_PREFER_SRC_TMP 0x0001 #define IPV6_PREFER_SRC_PUBLIC 0x0002 #define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100 #define IPV6_PREFER_SRC_COA 0x0004 #define IPV6_PREFER_SRC_HOME 0x0400 #define IPV6_PREFER_SRC_CGA 0x0008 #define IPV6_PREFER_SRC_NONCGA 0x0800 /* RFC5082: Generalized Ttl Security Mechanism */ #define IPV6_MINHOPCOUNT 73 #define IPV6_ORIGDSTADDR 74 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR #define IPV6_TRANSPARENT 75 #define IPV6_UNICAST_IF 76 #define IPV6_RECVFRAGSIZE 77 #define IPV6_FREEBIND 78 /* * Multicast Routing: * see include/uapi/linux/mroute6.h. * * MRT6_BASE 200 * ... * MRT6_MAX */ #endif /* _LINUX_IN6_H */