path: root/include/arch/x86_64/linux/in6.h

/* 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 */