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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_JUMBO 194
#define IPV6_TLV_HAO 201 /* home address option */
/*
* IPV6 socket options
*/
#if __UAPI_DEF_IPV6_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
#define IPV6_ADD_MEMBERSHIP 20
#define IPV6_DROP_MEMBERSHIP 21
#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
/* 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
#endif
/*
* 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 */