/* 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 _LINUX_IN6_H

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#define _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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/* 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 /* _LINUX_IN6_H */

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