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/* Copyright (C) 1991-2023 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
/* 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. */
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