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/* Copyright (C) 1997-2024 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/>. */
/* Generic version. */
#ifndef _NETINET_IN_H
# error "Never use <bits/in.h> directly; include <netinet/in.h> instead."
#endif
/* This is the generic version, do not assume a linux-based kernel. */
#define __USE_KERNEL_IPV6_DEFS 0
/* To select the IP level. */
#define SOL_IP 0
/* 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 1 /* ip_opts; IP per-packet options. */
#define IP_HDRINCL 2 /* int; Header is included with data. */
#define IP_TOS 3 /* int; IP type of service and precedence. */
#define IP_TTL 4 /* int; IP time to live. */
#define IP_RECVOPTS 5 /* bool; Receive all IP options w/datagram. */
#define IP_RECVRETOPTS 6 /* bool; Receive IP options for response. */
#define IP_RECVDSTADDR 7 /* bool; Receive IP dst addr w/datagram. */
#define IP_RETOPTS 8 /* ip_opts; Set/get IP per-packet options. */
#define IP_MULTICAST_IF 9 /* in_addr; set/get IP multicast i/f */
#define IP_MULTICAST_TTL 10 /* unsigned char; set/get IP multicast ttl */
#define IP_MULTICAST_LOOP 11 /* bool; set/get IP multicast loopback */
#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */
#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */
/* 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
#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. */
};
#endif
/* Socket-level values for IPv6. */
#define SOL_IPV6 41
#define SOL_ICMPV6 58
/* 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_RXINFO IPV6_2292PKTINFO
#define IPV6_TXINFO IPV6_RXINFO
#define SCM_SRCINFO IPV6_TXINFO
#define SCM_SRCRT IPV6_RXSRCRT
#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
/* 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. */
/* 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
/* RFC5014. */
#define IPV6_ADDR_PREFERENCES 72
/* RFC5082. */
#define IPV6_MINHOPCOUNT 73
/* Obsolete synonyms for the above. */
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
#define IPV6_RXHOPOPTS IPV6_2292HOPOPTS
#define IPV6_RXDSTOPTS IPV6_2292DSTOPTS
/* 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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