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glibc/inet/netinet/in.h

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/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _NETINET_IN_H
#define _NETINET_IN_H 1
#include <features.h>
#include <sys/socket.h>
#include <sys/types.h>
__BEGIN_DECLS
/* Standard well-defined IP protocols. */
enum
{
IPPROTO_IP = 0, /* Dummy protocol for TCP. */
IPPROTO_ICMP = 1, /* Internet Control Message Protocol. */
IPPROTO_IGMP = 2, /* Internet Group Management Protocol. */
IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94). */
IPPROTO_TCP = 6, /* Transmission Control Protocol. */
IPPROTO_EGP = 8, /* Exterior Gateway Protocol. */
IPPROTO_PUP = 12, /* PUP protocol. */
IPPROTO_UDP = 17, /* User Datagram Protocol. */
IPPROTO_IDP = 22, /* XNS IDP protocol. */
IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling. */
IPPROTO_ICMPV6 = 58, /* ICMPv6. */
IPPROTO_RAW = 255, /* Raw IP packets. */
IPPROTO_MAX
};
/* Standard well-known ports. */
enum
{
IPPORT_ECHO = 7, /* Echo service. */
IPPORT_DISCARD = 9, /* Discard transmissions service. */
IPPORT_SYSTAT = 11, /* System status service. */
IPPORT_DAYTIME = 13, /* Time of day service. */
IPPORT_NETSTAT = 15, /* Network status service. */
IPPORT_FTP = 21, /* File Transfer Protocol. */
IPPORT_TELNET = 23, /* Telnet protocol. */
IPPORT_SMTP = 25, /* Simple Mail Transfer Protocol. */
IPPORT_TIMESERVER = 37, /* Timeserver service. */
IPPORT_NAMESERVER = 42, /* Domain Name Service. */
IPPORT_WHOIS = 43, /* Internet Whois service. */
IPPORT_MTP = 57,
IPPORT_TFTP = 69, /* Trivial File Transfer Protocol. */
IPPORT_RJE = 77,
IPPORT_FINGER = 79, /* Finger service. */
IPPORT_TTYLINK = 87,
IPPORT_SUPDUP = 95, /* SUPDUP protocol. */
IPPORT_EXECSERVER = 512, /* execd service. */
IPPORT_LOGINSERVER = 513, /* rlogind service. */
IPPORT_CMDSERVER = 514,
IPPORT_EFSSERVER = 520,
/* UDP ports. */
IPPORT_BIFFUDP = 512,
IPPORT_WHOSERVER = 513,
IPPORT_ROUTESERVER = 520,
/* Ports less than this value are reserved for privileged processes. */
IPPORT_RESERVED = 1024,
/* Ports greater this value are reserved for (non-privileged) servers. */
IPPORT_USERRESERVED = 5000
};
/* Internet address. */
struct in_addr
{
u_int32_t s_addr;
};
/* Definitions of the bits in an Internet address integer.
On subnets, host and network parts are found according to
the subnet mask, not these masks. */
#define IN_CLASSA(a) ((((unsigned) (a)) & 0x80000000) == 0)
#define IN_CLASSA_NET 0xff000000
#define IN_CLASSA_NSHIFT 24
#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
#define IN_CLASSA_MAX 128
#define IN_CLASSB(a) ((((unsigned) (a)) & 0xc0000000) == 0x80000000)
#define IN_CLASSB_NET 0xffff0000
#define IN_CLASSB_NSHIFT 16
#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
#define IN_CLASSB_MAX 65536
#define IN_CLASSC(a) ((((unsigned) (a)) & 0xc0000000) == 0xc0000000)
#define IN_CLASSC_NET 0xffffff00
#define IN_CLASSC_NSHIFT 8
#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
#define IN_CLASSD(a) ((((unsigned) (a)) & 0xf0000000) == 0xe0000000)
#define IN_MULTICAST(a) IN_CLASSD(a)
#define IN_EXPERIMENTAL(a) ((((unsigned) (a)) & 0xe0000000) == 0xe0000000)
#define IN_BADCLASS(a) ((((unsigned) (a)) & 0xf0000000) == 0xf0000000)
/* Address to accept any incoming messages. */
#define INADDR_ANY ((unsigned) 0x00000000)
/* Address to send to all hosts. */
#define INADDR_BROADCAST ((unsigned) 0xffffffff)
/* Address indicating an error return. */
#define INADDR_NONE ((unsigned) 0xffffffff)
/* Network number for local host loopback. */
#define IN_LOOPBACKNET 127
/* Address to loopback in software to local host. */
#ifndef INADDR_LOOPBACK
#define INADDR_LOOPBACK ((unsigned) 0x7f000001) /* Inet address 127.0.0.1. */
#endif
/* IPv6 address */
struct in6_addr
{
union
{
u_int8_t u6_addr8[16];
u_int16_t u6_addr16[8];
u_int32_t u6_addr32[4];
#if (~0UL) > 0xffffffff
u_int64_t u6_addr64[2];
#endif
} in6_u;
#define s6_addr in6_u.u6_addr8
#define s6_addr16 in6_u.u6_addr16
#define s6_addr32 in6_u.u6_addr32
#define s6_addr64 in6_u.u6_addr64
};
extern const struct in6_addr in6addr_any; /* :: */
extern const struct in6_addr in6addr_loopback; /* ::1 */
#define IN6ADDR_ANY_INIT { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }
#define IN6ADDR_LOOPBACK_INIT { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }
#define INET_ADDRSTRLEN 16
#define INET6_ADDRSTRLEN 46
/* Get the definition of the macro to define the common sockaddr members. */
#include <bits/sockaddr.h>
/* Structure describing an Internet socket address. */
struct sockaddr_in
{
__SOCKADDR_COMMON (sin_);
unsigned short int sin_port; /* Port number. */
struct in_addr sin_addr; /* Internet address. */
/* Pad to size of `struct sockaddr'. */
unsigned char sin_zero[sizeof (struct sockaddr) -
__SOCKADDR_COMMON_SIZE -
sizeof (unsigned short int) -
sizeof (struct in_addr)];
};
/* Ditto, for IPv6. */
struct sockaddr_in6
{
__SOCKADDR_COMMON (sin6_);
u_int16_t sin6_port; /* Transport layer port # */
u_int32_t sin6_flowinfo; /* IPv6 flow information */
struct in6_addr sin6_addr; /* IPv6 address */
};
/* IPv6 multicast request. */
struct ipv6_mreq
{
/* IPv6 multicast address of group */
struct in6_addr ipv6mr_multiaddr;
/* local IPv6 address of interface */
int ipv6mr_ifindex;
};
/* Get system-specific definitions. */
#include <netinet/inbits.h>
/* Functions to convert between host and network byte order.
Please note that these functions normally take `unsigned long int' or
`unsigned short int' values as arguments and also return them. But
this was a short-sighted decision since on different systems the types
may have different representations but the values are always the same. */
extern u_int32_t __ntohl __P ((u_int32_t __netlong));
extern u_int32_t ntohl __P ((u_int32_t __netlong));
extern u_int16_t __ntohs __P ((u_int16_t __netshort));
extern u_int16_t ntohs __P ((u_int16_t __netshort));
extern u_int32_t __htonl __P ((u_int32_t __hostlong));
extern u_int32_t htonl __P ((u_int32_t __hostlong));
extern u_int16_t __htons __P ((u_int16_t __hostshort));
extern u_int16_t htons __P ((u_int16_t __hostshort));
#include <endian.h>
#if __BYTE_ORDER == __BIG_ENDIAN
/* The host byte order is the same as network byte order,
so these functions are all just identity. */
# define ntohl(x) (x)
# define ntohs(x) (x)
# define htonl(x) (x)
# define htons(x) (x)
#else
# if __BYTE_ORDER == __LITTLE_ENDIAN && defined __OPTIMIZE__
# define ntohl(x) (__builtin_constant_p (x) \
? __constant_htontohl (x) : __ntohl (x))
# define ntohs(x) (__builtin_constant_p (x) \
? __constant_htontohs (x) : __ntohs (x))
# define htonl(x) (__builtin_constant_p (x) \
? __constant_htontohl (x) : __htonl (x))
# define htons(x) (__builtin_constant_p (x) \
? __constant_htontohl (x) : __htonl (x))
# define __constant_htontohl(x) \
((((x) & 0xff000000) >> 24) | \
(((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | \
(((x) & 0x000000ff) << 24))
# define __constant_htontohs(x) \
((((x) & 0x0000ff00) >> 8) | \
(((x) & 0x000000ff) << 8))
/* Now get machine dependent optimized versions for the real work. */
# include <bits/htontoh.h>
# endif
#endif
#define IN6_IS_ADDR_UNSPECIFIED(a) \
((((u_int32_t *) (a))[0] == 0) && ((u_int32_t *) (a))[1] == 0) && \
(((u_int32_t *) (a))[2] == 0) && ((u_int32_t *) (a))[3] == 0))
#define IN6_IS_ADDR_LOOPBACK(a) \
((((u_int32_t *) (a))[0] == 0) && ((u_int32_t *) (a))[1] == 0) && \
(((u_int32_t *) (a))[2] == 0) && ((u_int32_t *) (a))[3] == htonl (1)))
#define IN6_IS_ADDR_MULTICAST(a) (((u_int8_t *) (a))[0] == 0xff)
#define IN6_IS_ADDR_LINKLOCAL(a) \
((((u_int32_t *) (a))[0] & htonl (0xffc00000)) == htonl (0xfe800000))
#define IN6_IS_ADDR_SITELOCAL(a) \
((((u_int32_t *) (a))[0] & htonl (0xffc00000)) == htonl (0xfec00000))
#define IN6_IS_ADDR_V4MAPPED(a) \
((((u_int32_t *) (a))[0] == 0) && (((u_int32_t *) (a))[1] == 0) && \
(((u_int32_t *) (a))[2] == htonl (0xffff)))
#define IN6_IS_ADDR_V4COMPAT(a) \
((((u_int32_t *) (a))[0] == 0) && (((u_int32_t *) (a))[1] == 0) && \
(((u_int32_t *) (a))[2] == 0) && (ntohl (((u_int32_t *) (a))[3]) > 1))
/* Bind socket to a privileged IP port. */
extern int bindresvport __P ((int __sockfd, struct sockaddr_in *__sin));
/* IPv6 packet information. */
struct in6_pktinfo
{
struct in6_addr ipi6_addr; /* src/dst IPv6 address */
int ipi6_ifindex; /* send/recv interface index */
};
__END_DECLS
#endif /* netinet/in.h */
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