include/linux/in6.h - kernel/msm-4.19 - Gitiles

 /*
  *	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>

 /*
  *	IPv6 address structure
  */

 struct in6_addr {
 	union {
 		__u8		u6_addr8[16];
 		__be16		u6_addr16[8];
 		__be32		u6_addr32[4];
 	} in6_u;
 #define s6_addr			in6_u.u6_addr8
 #define s6_addr16		in6_u.u6_addr16
 #define s6_addr32		in6_u.u6_addr32
 };

 /* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
  * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
  * in network byte order, not in host byte order as are the IPv4 equivalents
  */
 #ifdef __KERNEL__
 extern const struct in6_addr in6addr_any;
 #define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
 extern const struct in6_addr in6addr_loopback;
 #define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
 extern const struct in6_addr in6addr_linklocal_allnodes;
 #define IN6ADDR_LINKLOCAL_ALLNODES_INIT	\
 		{ { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
 extern const struct in6_addr in6addr_linklocal_allrouters;
 #define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
 		{ { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2 } } }
 #endif

 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) */
 };

 struct ipv6_mreq {
 	/* IPv6 multicast address of group */
 	struct in6_addr ipv6mr_multiaddr;

 	/* local IPv6 address of interface */
 	int		ipv6mr_ifindex;
 };

 #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_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 defintions 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
  */
 #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		*/

 /*
  *	IPv6 TLV options.
  */
 #define IPV6_TLV_PAD0		0
 #define IPV6_TLV_PADN		1
 #define IPV6_TLV_ROUTERALERT	5
 #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
 #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

 /* Flowlabel */
 #define IPV6_FLOWLABEL_MGR	32
 #define IPV6_FLOWINFO_SEND	33

 #define IPV6_IPSEC_POLICY	34
 #define IPV6_XFRM_POLICY	35

 /*
  * 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
 #if 0	/* not yet */
 #define IPV6_RECVPATHMTU	60
 #define IPV6_PATHMTU		61
 #define IPV6_DONTFRAG		62
 #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
  */

 /* 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

 /*
  * Multicast Routing:
  * see include/linux/mroute6.h.
  *
  * MRT6_INIT			200
  * MRT6_DONE			201
  * MRT6_ADD_MIF			202
  * MRT6_DEL_MIF			203
  * MRT6_ADD_MFC			204
  * MRT6_DEL_MFC			205
  * MRT6_VERSION			206
  * MRT6_ASSERT			207
  * MRT6_PIM			208
  * (reserved)			209
  */
 #endif
	/*
	* 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>

	/*
	* IPv6 address structure
	*/

	struct in6_addr {
	union {
	__u8 u6_addr8[16];
	__be16 u6_addr16[8];
	__be32 u6_addr32[4];
	} in6_u;
	#define s6_addr in6_u.u6_addr8
	#define s6_addr16 in6_u.u6_addr16
	#define s6_addr32 in6_u.u6_addr32
	};

	/* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
	* NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
	* in network byte order, not in host byte order as are the IPv4 equivalents
	*/
	#ifdef __KERNEL__
	extern const struct in6_addr in6addr_any;
	#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } }
	extern const struct in6_addr in6addr_loopback;
	#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
	extern const struct in6_addr in6addr_linklocal_allnodes;
	#define IN6ADDR_LINKLOCAL_ALLNODES_INIT \
	{ { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } }
	extern const struct in6_addr in6addr_linklocal_allrouters;
	#define IN6ADDR_LINKLOCAL_ALLROUTERS_INIT \
	{ { { 0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2 } } }
	#endif

	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) */
	};

	struct ipv6_mreq {
	/* IPv6 multicast address of group */
	struct in6_addr ipv6mr_multiaddr;

	/* local IPv6 address of interface */
	int ipv6mr_ifindex;
	};

	#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_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 defintions 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
	*/
	#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 */

	/*
	* IPv6 TLV options.
	*/
	#define IPV6_TLV_PAD0 0
	#define IPV6_TLV_PADN 1
	#define IPV6_TLV_ROUTERALERT 5
	#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
	#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

	/* Flowlabel */
	#define IPV6_FLOWLABEL_MGR 32
	#define IPV6_FLOWINFO_SEND 33

	#define IPV6_IPSEC_POLICY 34
	#define IPV6_XFRM_POLICY 35

	/*
	* 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
	#if 0 /* not yet */
	#define IPV6_RECVPATHMTU 60
	#define IPV6_PATHMTU 61
	#define IPV6_DONTFRAG 62
	#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
	*/

	/* 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

	/*
	* Multicast Routing:
	* see include/linux/mroute6.h.
	*
	* MRT6_INIT 200
	* MRT6_DONE 201
	* MRT6_ADD_MIF 202
	* MRT6_DEL_MIF 203
	* MRT6_ADD_MFC 204
	* MRT6_DEL_MFC 205
	* MRT6_VERSION 206
	* MRT6_ASSERT 207
	* MRT6_PIM 208
	* (reserved) 209
	*/
	#endif