/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/*
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* Types and definitions for AF_INET6
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* Linux INET6 implementation
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*
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* Authors:
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* Pedro Roque <roque@di.fc.ul.pt>
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*
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* Sources:
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* IPv6 Program Interfaces for BSD Systems
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* <draft-ietf-ipngwg-bsd-api-05.txt>
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*
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* Advanced Sockets API for IPv6
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* <draft-stevens-advanced-api-00.txt>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _UAPI_LINUX_IN6_H
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#define _UAPI_LINUX_IN6_H
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#include <linux/types.h>
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#include <linux/libc-compat.h>
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/*
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* IPv6 address structure
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*/
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#if __UAPI_DEF_IN6_ADDR
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struct in6_addr {
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union {
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__u8 u6_addr8[16];
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#if __UAPI_DEF_IN6_ADDR_ALT
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__be16 u6_addr16[8];
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__be32 u6_addr32[4];
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#endif
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} in6_u;
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#define s6_addr in6_u.u6_addr8
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#if __UAPI_DEF_IN6_ADDR_ALT
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#define s6_addr16 in6_u.u6_addr16
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#define s6_addr32 in6_u.u6_addr32
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#endif
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};
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#endif /* __UAPI_DEF_IN6_ADDR */
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#if __UAPI_DEF_SOCKADDR_IN6
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struct sockaddr_in6 {
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unsigned short int sin6_family; /* AF_INET6 */
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__be16 sin6_port; /* Transport layer port # */
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__be32 sin6_flowinfo; /* IPv6 flow information */
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struct in6_addr sin6_addr; /* IPv6 address */
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__u32 sin6_scope_id; /* scope id (new in RFC2553) */
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};
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#endif /* __UAPI_DEF_SOCKADDR_IN6 */
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#if __UAPI_DEF_IPV6_MREQ
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struct ipv6_mreq {
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/* IPv6 multicast address of group */
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struct in6_addr ipv6mr_multiaddr;
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/* local IPv6 address of interface */
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int ipv6mr_ifindex;
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};
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#endif /* __UAPI_DEF_IVP6_MREQ */
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#define ipv6mr_acaddr ipv6mr_multiaddr
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struct in6_flowlabel_req {
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struct in6_addr flr_dst;
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__be32 flr_label;
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__u8 flr_action;
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__u8 flr_share;
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__u16 flr_flags;
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__u16 flr_expires;
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__u16 flr_linger;
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__u32 __flr_pad;
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/* Options in format of IPV6_PKTOPTIONS */
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};
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#define IPV6_FL_A_GET 0
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#define IPV6_FL_A_PUT 1
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#define IPV6_FL_A_RENEW 2
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#define IPV6_FL_F_CREATE 1
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#define IPV6_FL_F_EXCL 2
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#define IPV6_FL_F_REFLECT 4
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#define IPV6_FL_F_REMOTE 8
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#define IPV6_FL_S_NONE 0
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#define IPV6_FL_S_EXCL 1
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#define IPV6_FL_S_PROCESS 2
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#define IPV6_FL_S_USER 3
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#define IPV6_FL_S_ANY 255
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/*
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* Bitmask constant declarations to help applications select out the
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* flow label and priority fields.
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*
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* Note that this are in host byte order while the flowinfo field of
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* sockaddr_in6 is in network byte order.
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*/
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#define IPV6_FLOWINFO_FLOWLABEL 0x000fffff
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#define IPV6_FLOWINFO_PRIORITY 0x0ff00000
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/* These definitions are obsolete */
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#define IPV6_PRIORITY_UNCHARACTERIZED 0x0000
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#define IPV6_PRIORITY_FILLER 0x0100
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#define IPV6_PRIORITY_UNATTENDED 0x0200
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#define IPV6_PRIORITY_RESERVED1 0x0300
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#define IPV6_PRIORITY_BULK 0x0400
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#define IPV6_PRIORITY_RESERVED2 0x0500
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#define IPV6_PRIORITY_INTERACTIVE 0x0600
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#define IPV6_PRIORITY_CONTROL 0x0700
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#define IPV6_PRIORITY_8 0x0800
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#define IPV6_PRIORITY_9 0x0900
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#define IPV6_PRIORITY_10 0x0a00
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#define IPV6_PRIORITY_11 0x0b00
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#define IPV6_PRIORITY_12 0x0c00
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#define IPV6_PRIORITY_13 0x0d00
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#define IPV6_PRIORITY_14 0x0e00
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#define IPV6_PRIORITY_15 0x0f00
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/*
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* IPV6 extension headers
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*/
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#if __UAPI_DEF_IPPROTO_V6
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#define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */
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#define IPPROTO_ROUTING 43 /* IPv6 routing header */
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#define IPPROTO_FRAGMENT 44 /* IPv6 fragmentation header */
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#define IPPROTO_ICMPV6 58 /* ICMPv6 */
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#define IPPROTO_NONE 59 /* IPv6 no next header */
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#define IPPROTO_DSTOPTS 60 /* IPv6 destination options */
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#define IPPROTO_MH 135 /* IPv6 mobility header */
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#endif /* __UAPI_DEF_IPPROTO_V6 */
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/*
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* IPv6 TLV options.
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*/
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#define IPV6_TLV_PAD1 0
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#define IPV6_TLV_PADN 1
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#define IPV6_TLV_ROUTERALERT 5
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#define IPV6_TLV_CALIPSO 7 /* RFC 5570 */
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#define IPV6_TLV_JUMBO 194
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#define IPV6_TLV_HAO 201 /* home address option */
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/*
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* IPV6 socket options
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*/
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#if __UAPI_DEF_IPV6_OPTIONS
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#define IPV6_ADDRFORM 1
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#define IPV6_2292PKTINFO 2
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#define IPV6_2292HOPOPTS 3
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#define IPV6_2292DSTOPTS 4
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#define IPV6_2292RTHDR 5
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#define IPV6_2292PKTOPTIONS 6
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#define IPV6_CHECKSUM 7
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#define IPV6_2292HOPLIMIT 8
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#define IPV6_NEXTHOP 9
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#define IPV6_AUTHHDR 10 /* obsolete */
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#define IPV6_FLOWINFO 11
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#define IPV6_UNICAST_HOPS 16
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#define IPV6_MULTICAST_IF 17
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#define IPV6_MULTICAST_HOPS 18
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#define IPV6_MULTICAST_LOOP 19
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#define IPV6_ADD_MEMBERSHIP 20
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#define IPV6_DROP_MEMBERSHIP 21
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#define IPV6_ROUTER_ALERT 22
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#define IPV6_MTU_DISCOVER 23
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#define IPV6_MTU 24
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#define IPV6_RECVERR 25
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#define IPV6_V6ONLY 26
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#define IPV6_JOIN_ANYCAST 27
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#define IPV6_LEAVE_ANYCAST 28
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#define IPV6_MULTICAST_ALL 29
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#define IPV6_ROUTER_ALERT_ISOLATE 30
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#define IPV6_RECVERR_RFC4884 31
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/* IPV6_MTU_DISCOVER values */
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#define IPV6_PMTUDISC_DONT 0
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#define IPV6_PMTUDISC_WANT 1
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#define IPV6_PMTUDISC_DO 2
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#define IPV6_PMTUDISC_PROBE 3
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/* same as IPV6_PMTUDISC_PROBE, provided for symetry with IPv4
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* also see comments on IP_PMTUDISC_INTERFACE
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*/
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#define IPV6_PMTUDISC_INTERFACE 4
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/* weaker version of IPV6_PMTUDISC_INTERFACE, which allows packets to
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* get fragmented if they exceed the interface mtu
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*/
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#define IPV6_PMTUDISC_OMIT 5
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/* Flowlabel */
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#define IPV6_FLOWLABEL_MGR 32
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#define IPV6_FLOWINFO_SEND 33
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#define IPV6_IPSEC_POLICY 34
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#define IPV6_XFRM_POLICY 35
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#define IPV6_HDRINCL 36
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#endif
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/*
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* Multicast:
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* Following socket options are shared between IPv4 and IPv6.
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*
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* MCAST_JOIN_GROUP 42
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* MCAST_BLOCK_SOURCE 43
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* MCAST_UNBLOCK_SOURCE 44
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* MCAST_LEAVE_GROUP 45
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* MCAST_JOIN_SOURCE_GROUP 46
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* MCAST_LEAVE_SOURCE_GROUP 47
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* MCAST_MSFILTER 48
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*/
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/*
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* Advanced API (RFC3542) (1)
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*
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* Note: IPV6_RECVRTHDRDSTOPTS does not exist. see net/ipv6/datagram.c.
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*/
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#define IPV6_RECVPKTINFO 49
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#define IPV6_PKTINFO 50
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#define IPV6_RECVHOPLIMIT 51
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#define IPV6_HOPLIMIT 52
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#define IPV6_RECVHOPOPTS 53
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#define IPV6_HOPOPTS 54
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#define IPV6_RTHDRDSTOPTS 55
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#define IPV6_RECVRTHDR 56
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#define IPV6_RTHDR 57
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#define IPV6_RECVDSTOPTS 58
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#define IPV6_DSTOPTS 59
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#define IPV6_RECVPATHMTU 60
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#define IPV6_PATHMTU 61
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#define IPV6_DONTFRAG 62
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#if 0 /* not yet */
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#define IPV6_USE_MIN_MTU 63
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#endif
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/*
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* Netfilter (1)
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*
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* Following socket options are used in ip6_tables;
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* see include/linux/netfilter_ipv6/ip6_tables.h.
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*
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* IP6T_SO_SET_REPLACE / IP6T_SO_GET_INFO 64
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* IP6T_SO_SET_ADD_COUNTERS / IP6T_SO_GET_ENTRIES 65
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*/
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/*
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* Advanced API (RFC3542) (2)
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*/
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#define IPV6_RECVTCLASS 66
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#define IPV6_TCLASS 67
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/*
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* Netfilter (2)
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*
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* Following socket options are used in ip6_tables;
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* see include/linux/netfilter_ipv6/ip6_tables.h.
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*
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* IP6T_SO_GET_REVISION_MATCH 68
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* IP6T_SO_GET_REVISION_TARGET 69
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* IP6T_SO_ORIGINAL_DST 80
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*/
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#define IPV6_AUTOFLOWLABEL 70
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/* RFC5014: Source address selection */
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#define IPV6_ADDR_PREFERENCES 72
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#define IPV6_PREFER_SRC_TMP 0x0001
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#define IPV6_PREFER_SRC_PUBLIC 0x0002
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#define IPV6_PREFER_SRC_PUBTMP_DEFAULT 0x0100
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#define IPV6_PREFER_SRC_COA 0x0004
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#define IPV6_PREFER_SRC_HOME 0x0400
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#define IPV6_PREFER_SRC_CGA 0x0008
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#define IPV6_PREFER_SRC_NONCGA 0x0800
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/* RFC5082: Generalized Ttl Security Mechanism */
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#define IPV6_MINHOPCOUNT 73
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#define IPV6_ORIGDSTADDR 74
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#define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR
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#define IPV6_TRANSPARENT 75
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#define IPV6_UNICAST_IF 76
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#define IPV6_RECVFRAGSIZE 77
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#define IPV6_FREEBIND 78
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/*
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* Multicast Routing:
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* see include/uapi/linux/mroute6.h.
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*
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* MRT6_BASE 200
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* ...
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* MRT6_MAX
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*/
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#endif /* _UAPI_LINUX_IN6_H */
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