[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / bits / in.h

/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

/* Linux version.  */

#ifndef _NETINET_IN_H
# error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
#endif

/* If the application has already included linux/in6.h from a linux-based
   kernel then we will not define the IPv6 IPPROTO_* defines, in6_addr (nor the
   defines), sockaddr_in6, or ipv6_mreq. Same for in6_ptkinfo or ip6_mtuinfo
   in linux/ipv6.h. The ABI used by the linux-kernel and glibc match exactly.
   Neither the linux kernel nor glibc should break this ABI without coordination.
   In upstream kernel 56c176c9 the _UAPI prefix was stripped so we need to check
   for _LINUX_IN6_H and _IPV6_H now, and keep checking the old versions for
   maximum backwards compatibility.  */
#if defined _UAPI_LINUX_IN6_H \
    || defined _UAPI_IPV6_H \
    || defined _LINUX_IN6_H \
    || defined _IPV6_H
/* This is not quite the same API since the kernel always defines s6_addr16 and
   s6_addr32. This is not a violation of POSIX since POSIX says "at least the
   following member" and that holds true.  */
# define __USE_KERNEL_IPV6_DEFS 1
#else
# define __USE_KERNEL_IPV6_DEFS 0
#endif

/* Options for use with `getsockopt' and `setsockopt' at the IP level.
   The first word in the comment at the right is the data type used;
   "bool" means a boolean value stored in an `int'.  */
#define        IP_OPTIONS      4       /* ip_opts; IP per-packet options.  */
#define        IP_HDRINCL      3       /* int; Header is included with data.  */
#define        IP_TOS          1       /* int; IP type of service and precedence.  */
#define        IP_TTL          2       /* int; IP time to live.  */
#define        IP_RECVOPTS     6       /* bool; Receive all IP options w/datagram.  */
/* For BSD compatibility.  */
#define        IP_RECVRETOPTS  IP_RETOPTS       /* bool; Receive IP options for response.  */
#define        IP_RETOPTS      7       /* ip_opts; Set/get IP per-packet options.  */
#define IP_MULTICAST_IF 32	/* in_addr; set/get IP multicast i/f */
#define IP_MULTICAST_TTL 33	/* unsigned char; set/get IP multicast ttl */
#define IP_MULTICAST_LOOP 34	/* bool; set/get IP multicast loopback */
#define IP_ADD_MEMBERSHIP 35	/* ip_mreq; add an IP group membership */
#define IP_DROP_MEMBERSHIP 36	/* ip_mreq; drop an IP group membership */
#define IP_UNBLOCK_SOURCE 37	/* ip_mreq_source: unblock data from source */
#define IP_BLOCK_SOURCE 38	/* ip_mreq_source: block data from source */
#define IP_ADD_SOURCE_MEMBERSHIP 39 /* ip_mreq_source: join source group */
#define IP_DROP_SOURCE_MEMBERSHIP 40 /* ip_mreq_source: leave source group */
#define IP_MSFILTER 41
#ifdef __USE_MISC
# define MCAST_JOIN_GROUP 42	/* group_req: join any-source group */
# define MCAST_BLOCK_SOURCE 43	/* group_source_req: block from given group */
# define MCAST_UNBLOCK_SOURCE 44 /* group_source_req: unblock from given group*/
# define MCAST_LEAVE_GROUP 45	/* group_req: leave any-source group */
# define MCAST_JOIN_SOURCE_GROUP 46 /* group_source_req: join source-spec gr */
# define MCAST_LEAVE_SOURCE_GROUP 47 /* group_source_req: leave source-spec gr*/
# define MCAST_MSFILTER 48
# define IP_MULTICAST_ALL 49
# define IP_UNICAST_IF 50

# define MCAST_EXCLUDE   0
# define MCAST_INCLUDE   1
#endif

#define IP_ROUTER_ALERT	5	/* bool */
#define IP_PKTINFO	8	/* bool */
#define IP_PKTOPTIONS	9
#define IP_PMTUDISC	10	/* obsolete name? */
#define IP_MTU_DISCOVER	10	/* int; see below */
#define IP_RECVERR	11	/* bool */
#define IP_RECVTTL	12	/* bool */
#define IP_RECVTOS	13	/* bool */
#define IP_MTU		14	/* int */
#define IP_FREEBIND	15
#define IP_IPSEC_POLICY 16
#define IP_XFRM_POLICY	17
#define IP_PASSSEC	18
#define IP_TRANSPARENT	19
#define IP_MULTICAST_ALL 49	/* bool */

/* TProxy original addresses */
#define IP_ORIGDSTADDR       20
#define IP_RECVORIGDSTADDR   IP_ORIGDSTADDR

#define IP_MINTTL       21
#define IP_NODEFRAG     22
#define IP_CHECKSUM     23
#define IP_BIND_ADDRESS_NO_PORT 24
#define IP_RECVFRAGSIZE 25
#define IP_RECVERR_RFC4884 26

/* IP_MTU_DISCOVER arguments.  */
#define IP_PMTUDISC_DONT   0	/* Never send DF frames.  */
#define IP_PMTUDISC_WANT   1	/* Use per route hints.  */
#define IP_PMTUDISC_DO     2	/* Always DF.  */
#define IP_PMTUDISC_PROBE  3	/* Ignore dst pmtu.  */
/* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
   Also incoming ICMP frag_needed notifications will be ignored on
   this socket to prevent accepting spoofed ones.  */
#define IP_PMTUDISC_INTERFACE           4
/* Like IP_PMTUDISC_INTERFACE but allow packets to be fragmented.  */
#define IP_PMTUDISC_OMIT		5

#define IP_MULTICAST_IF			32
#define IP_MULTICAST_TTL 		33
#define IP_MULTICAST_LOOP 		34
#define IP_ADD_MEMBERSHIP		35
#define IP_DROP_MEMBERSHIP		36
#define IP_UNBLOCK_SOURCE		37
#define IP_BLOCK_SOURCE			38
#define IP_ADD_SOURCE_MEMBERSHIP	39
#define IP_DROP_SOURCE_MEMBERSHIP	40
#define IP_MSFILTER			41
#define IP_MULTICAST_ALL		49
#define IP_UNICAST_IF			50
#define IP_LOCAL_PORT_RANGE		51
#define IP_PROTOCOL			52

/* To select the IP level.  */
#define SOL_IP	0

#define IP_DEFAULT_MULTICAST_TTL        1
#define IP_DEFAULT_MULTICAST_LOOP       1
#define IP_MAX_MEMBERSHIPS              20

#ifdef __USE_MISC
/* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
   The `ip_dst' field is used for the first-hop gateway when using a
   source route (this gets put into the header proper).  */
struct ip_opts
  {
    struct in_addr ip_dst;	/* First hop; zero without source route.  */
    char ip_opts[40];		/* Actually variable in size.  */
  };

/* Structure used for IP_PKTINFO.  */
struct in_pktinfo
  {
    int ipi_ifindex;			/* Interface index  */
    struct in_addr ipi_spec_dst;	/* Routing destination address  */
    struct in_addr ipi_addr;		/* Header destination address  */
  };
#endif

/* Options for use with `getsockopt' and `setsockopt' at the IPv6 level.
   The first word in the comment at the right is the data type used;
   "bool" means a boolean value stored in an `int'.  */
#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 SCM_SRCRT		IPV6_RXSRCRT

#define IPV6_NEXTHOP		9
#define IPV6_AUTHHDR		10
#define IPV6_UNICAST_HOPS	16
#define IPV6_MULTICAST_IF	17
#define IPV6_MULTICAST_HOPS	18
#define IPV6_MULTICAST_LOOP	19
#define IPV6_JOIN_GROUP		20
#define IPV6_LEAVE_GROUP	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
#define IPV6_MULTICAST_ALL	29
#define IPV6_ROUTER_ALERT_ISOLATE 30
#define IPV6_RECVERR_RFC4884	31
#define IPV6_IPSEC_POLICY	34
#define IPV6_XFRM_POLICY	35
#define IPV6_HDRINCL		36

/* Advanced API (RFC3542) (1).  */
#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

/* Advanced API (RFC3542) (2).  */
#define IPV6_RECVTCLASS		66
#define IPV6_TCLASS		67

#define IPV6_AUTOFLOWLABEL	70

/* RFC5014.  */
#define IPV6_ADDR_PREFERENCES	72

/* RFC5082.  */
#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

/* Obsolete synonyms for the above.  */
#if !__USE_KERNEL_IPV6_DEFS
# define IPV6_ADD_MEMBERSHIP	IPV6_JOIN_GROUP
# define IPV6_DROP_MEMBERSHIP	IPV6_LEAVE_GROUP
#endif
#define IPV6_RXHOPOPTS		IPV6_HOPOPTS
#define IPV6_RXDSTOPTS		IPV6_DSTOPTS

/* IPV6_MTU_DISCOVER values.  */
#define IPV6_PMTUDISC_DONT	0	/* Never send DF frames.  */
#define IPV6_PMTUDISC_WANT	1	/* Use per route hints.  */
#define IPV6_PMTUDISC_DO	2	/* Always DF.  */
#define IPV6_PMTUDISC_PROBE	3	/* Ignore dst pmtu.  */
#define IPV6_PMTUDISC_INTERFACE	4	/* See IP_PMTUDISC_INTERFACE.  */
#define IPV6_PMTUDISC_OMIT	5	/* See IP_PMTUDISC_OMIT.  */

/* Socket level values for IPv6.  */
#define SOL_IPV6        41
#define SOL_ICMPV6      58

/* Routing header options for IPv6.  */
#define IPV6_RTHDR_LOOSE	0	/* Hop doesn't need to be neighbour. */
#define IPV6_RTHDR_STRICT	1	/* Hop must be a neighbour.  */

#define IPV6_RTHDR_TYPE_0	0	/* IPv6 Routing header type 0.  */
Commit	Line	Data
dff8da6b	1	/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
0501d603 UD	2	This file is part of the GNU C Library.
0501d603 UD	3
478b92f0	4	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
0501d603 UD	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
478b92f0	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	12	Lesser General Public License for more details.
0501d603	13
41bdb6e2	14	You should have received a copy of the GNU Lesser General Public
59ba27a6	15	License along with the GNU C Library; if not, see
5a82c748	16	<https://www.gnu.org/licenses/>. */
0501d603 UD	17
	18	/* Linux version. */
	19
f4017d20 UD	20	#ifndef _NETINET_IN_H
	21	# error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
	22	#endif
0501d603	23
6c82a2f8 CD	24	/* If the application has already included linux/in6.h from a linux-based
6c82a2f8 CD	25	kernel then we will not define the IPv6 IPPROTO_* defines, in6_addr (nor the
cb43bb0d CW	26	defines), sockaddr_in6, or ipv6_mreq. Same for in6_ptkinfo or ip6_mtuinfo
cb43bb0d CW	27	in linux/ipv6.h. The ABI used by the linux-kernel and glibc match exactly.
c9bd40da CD	28	Neither the linux kernel nor glibc should break this ABI without coordination.
	29	In upstream kernel 56c176c9 the _UAPI prefix was stripped so we need to check
	30	for _LINUX_IN6_H and _IPV6_H now, and keep checking the old versions for
	31	maximum backwards compatibility. */
	32	#if defined _UAPI_LINUX_IN6_H \
	33	\|\| defined _UAPI_IPV6_H \
	34	\|\| defined _LINUX_IN6_H \
	35	\|\| defined _IPV6_H
6c82a2f8 CD	36	/* This is not quite the same API since the kernel always defines s6_addr16 and
	37	s6_addr32. This is not a violation of POSIX since POSIX says "at least the
	38	following member" and that holds true. */
1c1e7fb6 CD	39	# define __USE_KERNEL_IPV6_DEFS 1
	40	#else
	41	# define __USE_KERNEL_IPV6_DEFS 0
6c82a2f8 CD	42	#endif
6c82a2f8 CD	43
0501d603 UD	44	/* Options for use with `getsockopt' and `setsockopt' at the IP level.
	45	The first word in the comment at the right is the data type used;
	46	"bool" means a boolean value stored in an `int'. */
b84515a1 RM	47	#define IP_OPTIONS 4 /* ip_opts; IP per-packet options. */
	48	#define IP_HDRINCL 3 /* int; Header is included with data. */
	49	#define IP_TOS 1 /* int; IP type of service and precedence. */
	50	#define IP_TTL 2 /* int; IP time to live. */
	51	#define IP_RECVOPTS 6 /* bool; Receive all IP options w/datagram. */
	52	/* For BSD compatibility. */
	53	#define IP_RECVRETOPTS IP_RETOPTS /* bool; Receive IP options for response. */
	54	#define IP_RETOPTS 7 /* ip_opts; Set/get IP per-packet options. */
70682735	55	#define IP_MULTICAST_IF 32 /* in_addr; set/get IP multicast i/f */
11160cb7 ZW	56	#define IP_MULTICAST_TTL 33 /* unsigned char; set/get IP multicast ttl */
11160cb7 ZW	57	#define IP_MULTICAST_LOOP 34 /* bool; set/get IP multicast loopback */
70682735 UD	58	#define IP_ADD_MEMBERSHIP 35 /* ip_mreq; add an IP group membership */
	59	#define IP_DROP_MEMBERSHIP 36 /* ip_mreq; drop an IP group membership */
	60	#define IP_UNBLOCK_SOURCE 37 /* ip_mreq_source: unblock data from source */
	61	#define IP_BLOCK_SOURCE 38 /* ip_mreq_source: block data from source */
	62	#define IP_ADD_SOURCE_MEMBERSHIP 39 /* ip_mreq_source: join source group */
	63	#define IP_DROP_SOURCE_MEMBERSHIP 40 /* ip_mreq_source: leave source group */
	64	#define IP_MSFILTER 41
acd7f096	65	#ifdef __USE_MISC
a53d3f82 UD	66	# define MCAST_JOIN_GROUP 42 /* group_req: join any-source group */
	67	# define MCAST_BLOCK_SOURCE 43 /* group_source_req: block from given group */
	68	# define MCAST_UNBLOCK_SOURCE 44 /* group_source_req: unblock from given group*/
	69	# define MCAST_LEAVE_GROUP 45 /* group_req: leave any-source group */
	70	# define MCAST_JOIN_SOURCE_GROUP 46 /* group_source_req: join source-spec gr */
	71	# define MCAST_LEAVE_SOURCE_GROUP 47 /* group_source_req: leave source-spec gr*/
	72	# define MCAST_MSFILTER 48
be08eda5 AJ	73	# define IP_MULTICAST_ALL 49
be08eda5 AJ	74	# define IP_UNICAST_IF 50
a53d3f82 UD	75
	76	# define MCAST_EXCLUDE 0
	77	# define MCAST_INCLUDE 1
	78	#endif
b84515a1	79
d8c34cd1 UD	80	#define IP_ROUTER_ALERT 5 /* bool */
	81	#define IP_PKTINFO 8 /* bool */
	82	#define IP_PKTOPTIONS 9
	83	#define IP_PMTUDISC 10 /* obsolete name? */
	84	#define IP_MTU_DISCOVER 10 /* int; see below */
	85	#define IP_RECVERR 11 /* bool */
	86	#define IP_RECVTTL 12 /* bool */
	87	#define IP_RECVTOS 13 /* bool */
	88	#define IP_MTU 14 /* int */
	89	#define IP_FREEBIND 15
	90	#define IP_IPSEC_POLICY 16
	91	#define IP_XFRM_POLICY 17
	92	#define IP_PASSSEC 18
	93	#define IP_TRANSPARENT 19
2840865d	94	#define IP_MULTICAST_ALL 49 /* bool */
d8c34cd1 UD	95
	96	/* TProxy original addresses */
	97	#define IP_ORIGDSTADDR 20
	98	#define IP_RECVORIGDSTADDR IP_ORIGDSTADDR
	99
	100	#define IP_MINTTL 21
7c70f227	101	#define IP_NODEFRAG 22
31545c23	102	#define IP_CHECKSUM 23
04d9a38b	103	#define IP_BIND_ADDRESS_NO_PORT 24
72aaa20b	104	#define IP_RECVFRAGSIZE 25
b94cc191	105	#define IP_RECVERR_RFC4884 26
c10bb795 UD	106
	107	/* IP_MTU_DISCOVER arguments. */
	108	#define IP_PMTUDISC_DONT 0 /* Never send DF frames. */
	109	#define IP_PMTUDISC_WANT 1 /* Use per route hints. */
	110	#define IP_PMTUDISC_DO 2 /* Always DF. */
f081b451	111	#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu. */
7c70f227 MF	112	/* Always use interface mtu (ignores dst pmtu) but don't set DF flag.
	113	Also incoming ICMP frag_needed notifications will be ignored on
	114	this socket to prevent accepting spoofed ones. */
	115	#define IP_PMTUDISC_INTERFACE 4
76e5216e JM	116	/* Like IP_PMTUDISC_INTERFACE but allow packets to be fragmented. */
76e5216e JM	117	#define IP_PMTUDISC_OMIT 5
7c70f227 MF	118
	119	#define IP_MULTICAST_IF 32
	120	#define IP_MULTICAST_TTL 33
	121	#define IP_MULTICAST_LOOP 34
	122	#define IP_ADD_MEMBERSHIP 35
	123	#define IP_DROP_MEMBERSHIP 36
	124	#define IP_UNBLOCK_SOURCE 37
	125	#define IP_BLOCK_SOURCE 38
	126	#define IP_ADD_SOURCE_MEMBERSHIP 39
	127	#define IP_DROP_SOURCE_MEMBERSHIP 40
	128	#define IP_MSFILTER 41
7c70f227 MF	129	#define IP_MULTICAST_ALL 49
7c70f227 MF	130	#define IP_UNICAST_IF 50
a33c211b	131	#define IP_LOCAL_PORT_RANGE 51
bd154cdb	132	#define IP_PROTOCOL 52
c10bb795	133
0501d603 UD	134	/* To select the IP level. */
	135	#define SOL_IP 0
	136
c10bb795 UD	137	#define IP_DEFAULT_MULTICAST_TTL 1
	138	#define IP_DEFAULT_MULTICAST_LOOP 1
	139	#define IP_MAX_MEMBERSHIPS 20
	140
acd7f096	141	#ifdef __USE_MISC
b84515a1 RM	142	/* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.
	143	The `ip_dst' field is used for the first-hop gateway when using a
	144	source route (this gets put into the header proper). */
0501d603 UD	145	struct ip_opts
	146	{
	147	struct in_addr ip_dst; /* First hop; zero without source route. */
	148	char ip_opts[40]; /* Actually variable in size. */
	149	};
	150
ef5d6645 UD	151	/* Structure used for IP_PKTINFO. */
	152	struct in_pktinfo
	153	{
	154	int ipi_ifindex; /* Interface index */
	155	struct in_addr ipi_spec_dst; /* Routing destination address */
	156	struct in_addr ipi_addr; /* Header destination address */
	157	};
a53d3f82	158	#endif
ef5d6645	159
c10bb795 UD	160	/* Options for use with `getsockopt' and `setsockopt' at the IPv6 level.
	161	The first word in the comment at the right is the data type used;
	162	"bool" means a boolean value stored in an `int'. */
0501d603	163	#define IPV6_ADDRFORM 1
c2280dc0 UD	164	#define IPV6_2292PKTINFO 2
	165	#define IPV6_2292HOPOPTS 3
	166	#define IPV6_2292DSTOPTS 4
	167	#define IPV6_2292RTHDR 5
	168	#define IPV6_2292PKTOPTIONS 6
0501d603	169	#define IPV6_CHECKSUM 7
c2280dc0	170	#define IPV6_2292HOPLIMIT 8
b84515a1 RM	171
	172	#define SCM_SRCRT IPV6_RXSRCRT
	173
c10bb795 UD	174	#define IPV6_NEXTHOP 9
c10bb795 UD	175	#define IPV6_AUTHHDR 10
0501d603 UD	176	#define IPV6_UNICAST_HOPS 16
	177	#define IPV6_MULTICAST_IF 17
	178	#define IPV6_MULTICAST_HOPS 18
	179	#define IPV6_MULTICAST_LOOP 19
e7c036b3 UD	180	#define IPV6_JOIN_GROUP 20
e7c036b3 UD	181	#define IPV6_LEAVE_GROUP 21
ec986e23	182	#define IPV6_ROUTER_ALERT 22
ad483238 UD	183	#define IPV6_MTU_DISCOVER 23
	184	#define IPV6_MTU 24
	185	#define IPV6_RECVERR 25
2229b771 UD	186	#define IPV6_V6ONLY 26
	187	#define IPV6_JOIN_ANYCAST 27
	188	#define IPV6_LEAVE_ANYCAST 28
6ef3d225	189	#define IPV6_MULTICAST_ALL 29
cf274686	190	#define IPV6_ROUTER_ALERT_ISOLATE 30
b94cc191	191	#define IPV6_RECVERR_RFC4884 31
2229b771 UD	192	#define IPV6_IPSEC_POLICY 34
2229b771 UD	193	#define IPV6_XFRM_POLICY 35
981569c7	194	#define IPV6_HDRINCL 36
c10bb795	195
1c1e3125	196	/* Advanced API (RFC3542) (1). */
c2280dc0 UD	197	#define IPV6_RECVPKTINFO 49
	198	#define IPV6_PKTINFO 50
	199	#define IPV6_RECVHOPLIMIT 51
	200	#define IPV6_HOPLIMIT 52
	201	#define IPV6_RECVHOPOPTS 53
	202	#define IPV6_HOPOPTS 54
	203	#define IPV6_RTHDRDSTOPTS 55
	204	#define IPV6_RECVRTHDR 56
	205	#define IPV6_RTHDR 57
	206	#define IPV6_RECVDSTOPTS 58
	207	#define IPV6_DSTOPTS 59
1c1e3125 CD	208	#define IPV6_RECVPATHMTU 60
	209	#define IPV6_PATHMTU 61
	210	#define IPV6_DONTFRAG 62
c2280dc0	211
1c1e3125	212	/* Advanced API (RFC3542) (2). */
c2280dc0 UD	213	#define IPV6_RECVTCLASS 66
	214	#define IPV6_TCLASS 67
	215
53a4608f JM	216	#define IPV6_AUTOFLOWLABEL 70
	217
	218	/* RFC5014. */
	219	#define IPV6_ADDR_PREFERENCES 72
	220
	221	/* RFC5082. */
	222	#define IPV6_MINHOPCOUNT 73
	223
	224	#define IPV6_ORIGDSTADDR 74
	225	#define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR
	226	#define IPV6_TRANSPARENT 75
	227	#define IPV6_UNICAST_IF 76
	228	#define IPV6_RECVFRAGSIZE 77
41376f8c	229	#define IPV6_FREEBIND 78
53a4608f	230
e7c036b3	231	/* Obsolete synonyms for the above. */
c9bd40da CD	232	#if !__USE_KERNEL_IPV6_DEFS
	233	# define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
	234	# define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
	235	#endif
b84515a1 RM	236	#define IPV6_RXHOPOPTS IPV6_HOPOPTS
b84515a1 RM	237	#define IPV6_RXDSTOPTS IPV6_DSTOPTS
c10bb795 UD	238
	239	/* IPV6_MTU_DISCOVER values. */
	240	#define IPV6_PMTUDISC_DONT 0 /* Never send DF frames. */
	241	#define IPV6_PMTUDISC_WANT 1 /* Use per route hints. */
	242	#define IPV6_PMTUDISC_DO 2 /* Always DF. */
f081b451	243	#define IPV6_PMTUDISC_PROBE 3 /* Ignore dst pmtu. */
76e5216e JM	244	#define IPV6_PMTUDISC_INTERFACE 4 /* See IP_PMTUDISC_INTERFACE. */
76e5216e JM	245	#define IPV6_PMTUDISC_OMIT 5 /* See IP_PMTUDISC_OMIT. */
c10bb795 UD	246
	247	/* Socket level values for IPv6. */
	248	#define SOL_IPV6 41
	249	#define SOL_ICMPV6 58
bfaf0bbb UD	250
	251	/* Routing header options for IPv6. */
	252	#define IPV6_RTHDR_LOOSE 0 /* Hop doesn't need to be neighbour. */
	253	#define IPV6_RTHDR_STRICT 1 /* Hop must be a neighbour. */
	254
	255	#define IPV6_RTHDR_TYPE_0 0 /* IPv6 Routing header type 0. */