/* Copyright (C) 1991-2018 Free Software Foundation, Inc.

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This file is part of the GNU C Library.

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The GNU C Library is free software; you can redistribute it and/or

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modify it under the terms of the GNU Lesser General Public

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License as published by the Free Software Foundation; either

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version 2.1 of the License, or (at your option) any later version.

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The GNU C Library is distributed in the hope that it will be useful,

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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Lesser General Public License for more details.

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You should have received a copy of the GNU Lesser General Public

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License along with the GNU C Library; if not, see

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<http://www.gnu.org/licenses/>. */

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/* Linux version. */

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#ifndef _NETINET_IN_H

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

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#endif

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/* If the application has already included linux/in6.h from a linux-based

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kernel then we will not define the IPv6 IPPROTO_* defines, in6_addr (nor the

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defines), sockaddr_in6, or ipv6_mreq. Same for in6_ptkinfo or ip6_mtuinfo

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in linux/ipv6.h. The ABI used by the linux-kernel and glibc match exactly.

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Neither the linux kernel nor glibc should break this ABI without coordination.

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In upstream kernel 56c176c9 the _UAPI prefix was stripped so we need to check

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for _LINUX_IN6_H and _IPV6_H now, and keep checking the old versions for

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maximum backwards compatibility. */

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#if defined _UAPI_LINUX_IN6_H \

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|| defined _UAPI_IPV6_H \

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|| defined _LINUX_IN6_H \

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|| defined _IPV6_H

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/* This is not quite the same API since the kernel always defines s6_addr16 and

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s6_addr32. This is not a violation of POSIX since POSIX says "at least the

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following member" and that holds true. */

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# define __USE_KERNEL_IPV6_DEFS 1

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#else

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# define __USE_KERNEL_IPV6_DEFS 0

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#endif

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/* Options for use with `getsockopt' and `setsockopt' at the IP level.

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The first word in the comment at the right is the data type used;

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"bool" means a boolean value stored in an `int'. */

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#define IP_OPTIONS 4 /* ip_opts; IP per-packet options. */

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#define IP_HDRINCL 3 /* int; Header is included with data. */

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#define IP_TOS 1 /* int; IP type of service and precedence. */

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#define IP_TTL 2 /* int; IP time to live. */

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#define IP_RECVOPTS 6 /* bool; Receive all IP options w/datagram. */

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/* For BSD compatibility. */

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#define IP_RECVRETOPTS IP_RETOPTS /* bool; Receive IP options for response. */

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#define IP_RETOPTS 7 /* ip_opts; Set/get IP per-packet options. */

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#define IP_MULTICAST_IF 32 /* in_addr; set/get IP multicast i/f */

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#define IP_MULTICAST_TTL 33 /* unsigned char; set/get IP multicast ttl */

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#define IP_MULTICAST_LOOP 34 /* bool; set/get IP multicast loopback */

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#define IP_ADD_MEMBERSHIP 35 /* ip_mreq; add an IP group membership */

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#define IP_DROP_MEMBERSHIP 36 /* ip_mreq; drop an IP group membership */

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#define IP_UNBLOCK_SOURCE 37 /* ip_mreq_source: unblock data from source */

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#define IP_BLOCK_SOURCE 38 /* ip_mreq_source: block data from source */

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#define IP_ADD_SOURCE_MEMBERSHIP 39 /* ip_mreq_source: join source group */

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#define IP_DROP_SOURCE_MEMBERSHIP 40 /* ip_mreq_source: leave source group */

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#define IP_MSFILTER 41

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#ifdef __USE_MISC

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# define MCAST_JOIN_GROUP 42 /* group_req: join any-source group */

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# define MCAST_BLOCK_SOURCE 43 /* group_source_req: block from given group */

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# define MCAST_UNBLOCK_SOURCE 44 /* group_source_req: unblock from given group*/

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# define MCAST_LEAVE_GROUP 45 /* group_req: leave any-source group */

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# define MCAST_JOIN_SOURCE_GROUP 46 /* group_source_req: join source-spec gr */

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# define MCAST_LEAVE_SOURCE_GROUP 47 /* group_source_req: leave source-spec gr*/

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# define MCAST_MSFILTER 48

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# define IP_MULTICAST_ALL 49

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# define IP_UNICAST_IF 50

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# define MCAST_EXCLUDE 0

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# define MCAST_INCLUDE 1

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#endif

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#define IP_ROUTER_ALERT 5 /* bool */

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#define IP_PKTINFO 8 /* bool */

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#define IP_PKTOPTIONS 9

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#define IP_PMTUDISC 10 /* obsolete name? */

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#define IP_MTU_DISCOVER 10 /* int; see below */

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#define IP_RECVERR 11 /* bool */

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#define IP_RECVTTL 12 /* bool */

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#define IP_RECVTOS 13 /* bool */

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#define IP_MTU 14 /* int */

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#define IP_FREEBIND 15

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#define IP_IPSEC_POLICY 16

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#define IP_XFRM_POLICY 17

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#define IP_PASSSEC 18

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#define IP_TRANSPARENT 19

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#define IP_MULTICAST_ALL 49 /* bool */

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/* TProxy original addresses */

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#define IP_ORIGDSTADDR 20

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#define IP_RECVORIGDSTADDR IP_ORIGDSTADDR

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#define IP_MINTTL 21

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#define IP_NODEFRAG 22

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#define IP_CHECKSUM 23

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#define IP_BIND_ADDRESS_NO_PORT 24

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#define IP_RECVFRAGSIZE 25

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/* IP_MTU_DISCOVER arguments. */

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#define IP_PMTUDISC_DONT 0 /* Never send DF frames. */

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#define IP_PMTUDISC_WANT 1 /* Use per route hints. */

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#define IP_PMTUDISC_DO 2 /* Always DF. */

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#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu. */

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/* Always use interface mtu (ignores dst pmtu) but don't set DF flag.

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Also incoming ICMP frag_needed notifications will be ignored on

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this socket to prevent accepting spoofed ones. */

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#define IP_PMTUDISC_INTERFACE 4

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/* Like IP_PMTUDISC_INTERFACE but allow packets to be fragmented. */

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#define IP_PMTUDISC_OMIT 5

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#define IP_MULTICAST_IF 32

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#define IP_MULTICAST_TTL 33

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#define IP_MULTICAST_LOOP 34

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#define IP_ADD_MEMBERSHIP 35

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#define IP_DROP_MEMBERSHIP 36

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#define IP_UNBLOCK_SOURCE 37

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#define IP_BLOCK_SOURCE 38

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#define IP_ADD_SOURCE_MEMBERSHIP 39

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#define IP_DROP_SOURCE_MEMBERSHIP 40

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#define IP_MSFILTER 41

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#define IP_MULTICAST_ALL 49

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#define IP_UNICAST_IF 50

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/* To select the IP level. */

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#define SOL_IP 0

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#define IP_DEFAULT_MULTICAST_TTL 1

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#define IP_DEFAULT_MULTICAST_LOOP 1

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#define IP_MAX_MEMBERSHIPS 20

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#ifdef __USE_MISC

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/* Structure used to describe IP options for IP_OPTIONS and IP_RETOPTS.

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The `ip_dst' field is used for the first-hop gateway when using a

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source route (this gets put into the header proper). */

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struct ip_opts

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{

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struct in_addr ip_dst; /* First hop; zero without source route. */

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char ip_opts[40]; /* Actually variable in size. */

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};

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/* Like `struct ip_mreq' but including interface specification by index. */

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struct ip_mreqn

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{

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struct in_addr imr_multiaddr; /* IP multicast address of group */

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struct in_addr imr_address; /* local IP address of interface */

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int imr_ifindex; /* Interface index */

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};

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/* Structure used for IP_PKTINFO. */

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struct in_pktinfo

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{

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int ipi_ifindex; /* Interface index */

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struct in_addr ipi_spec_dst; /* Routing destination address */

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struct in_addr ipi_addr; /* Header destination address */

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};

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#endif

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/* Options for use with `getsockopt' and `setsockopt' at the IPv6 level.

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The first word in the comment at the right is the data type used;

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"bool" means a boolean value stored in an `int'. */

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#define IPV6_ADDRFORM 1

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#define IPV6_2292PKTINFO 2

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#define IPV6_2292HOPOPTS 3

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#define IPV6_2292DSTOPTS 4

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#define IPV6_2292RTHDR 5

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#define IPV6_2292PKTOPTIONS 6

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#define IPV6_CHECKSUM 7

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#define IPV6_2292HOPLIMIT 8

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#define SCM_SRCRT IPV6_RXSRCRT

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#define IPV6_NEXTHOP 9

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#define IPV6_AUTHHDR 10

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#define IPV6_UNICAST_HOPS 16

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#define IPV6_MULTICAST_IF 17

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#define IPV6_MULTICAST_HOPS 18

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#define IPV6_MULTICAST_LOOP 19

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#define IPV6_JOIN_GROUP 20

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#define IPV6_LEAVE_GROUP 21

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#define IPV6_ROUTER_ALERT 22

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#define IPV6_MTU_DISCOVER 23

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#define IPV6_MTU 24

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#define IPV6_RECVERR 25

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#define IPV6_V6ONLY 26

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#define IPV6_JOIN_ANYCAST 27

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#define IPV6_LEAVE_ANYCAST 28

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#define IPV6_IPSEC_POLICY 34

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#define IPV6_XFRM_POLICY 35

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#define IPV6_HDRINCL 36

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

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#define IPV6_RECVPKTINFO 49

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#define IPV6_PKTINFO 50

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#define IPV6_RECVHOPLIMIT 51

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#define IPV6_HOPLIMIT 52

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#define IPV6_RECVHOPOPTS 53

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#define IPV6_HOPOPTS 54

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#define IPV6_RTHDRDSTOPTS 55

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#define IPV6_RECVRTHDR 56

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#define IPV6_RTHDR 57

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#define IPV6_RECVDSTOPTS 58

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#define IPV6_DSTOPTS 59

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#define IPV6_RECVPATHMTU 60

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#define IPV6_PATHMTU 61

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#define IPV6_DONTFRAG 62

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/* Advanced API (RFC3542) (2). */

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#define IPV6_RECVTCLASS 66

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#define IPV6_TCLASS 67

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#define IPV6_AUTOFLOWLABEL 70

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/* RFC5014. */

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#define IPV6_ADDR_PREFERENCES 72

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/* RFC5082. */

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#define IPV6_MINHOPCOUNT 73

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#define IPV6_ORIGDSTADDR 74

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#define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR

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#define IPV6_TRANSPARENT 75

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#define IPV6_UNICAST_IF 76

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#define IPV6_RECVFRAGSIZE 77

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#define IPV6_FREEBIND 78

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/* Obsolete synonyms for the above. */

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#if !__USE_KERNEL_IPV6_DEFS

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# define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP

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# define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP

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#endif

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#define IPV6_RXHOPOPTS IPV6_HOPOPTS

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#define IPV6_RXDSTOPTS IPV6_DSTOPTS

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/* IPV6_MTU_DISCOVER values. */

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#define IPV6_PMTUDISC_DONT 0 /* Never send DF frames. */

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#define IPV6_PMTUDISC_WANT 1 /* Use per route hints. */

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#define IPV6_PMTUDISC_DO 2 /* Always DF. */

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#define IPV6_PMTUDISC_PROBE 3 /* Ignore dst pmtu. */

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#define IPV6_PMTUDISC_INTERFACE 4 /* See IP_PMTUDISC_INTERFACE. */

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#define IPV6_PMTUDISC_OMIT 5 /* See IP_PMTUDISC_OMIT. */

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/* Socket level values for IPv6. */

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#define SOL_IPV6 41

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#define SOL_ICMPV6 58

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/* Routing header options for IPv6. */

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#define IPV6_RTHDR_LOOSE 0 /* Hop doesn't need to be neighbour. */

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#define IPV6_RTHDR_STRICT 1 /* Hop must be a neighbour. */

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#define IPV6_RTHDR_TYPE_0 0 /* IPv6 Routing header type 0. */

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