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/* Get address information.
Copyright (C) 1996-2002, 2003, 2004, 2005, 2006, 2008, 2009
Free Software Foundation, Inc.
Contributed by Simon Josefsson <simon@josefsson.org>.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef GETADDRINFO_H
#define GETADDRINFO_H
/* sys/socket.h in i386-unknown-freebsd4.10 and
powerpc-apple-darwin5.5 require sys/types.h, so include it first.
Then we'll also get 'socklen_t' and 'struct sockaddr' which are
used below. */
#include <sys/types.h>
/* Get all getaddrinfo related declarations, if available. */
#if !(defined WIN32 || defined _WIN32) || defined __CYGWIN__
# include <sys/socket.h>
#else
# include <ws2tcpip.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#ifndef HAVE_STRUCT_ADDRINFO
/* Structure to contain information about address of a service provider. */
struct addrinfo
{
int ai_flags; /* Input flags. */
int ai_family; /* Protocol family for socket. */
int ai_socktype; /* Socket type. */
int ai_protocol; /* Protocol for socket. */
socklen_t ai_addrlen; /* Length of socket address. */
struct sockaddr *ai_addr; /* Socket address for socket. */
char *ai_canonname; /* Canonical name for service location. */
struct addrinfo *ai_next; /* Pointer to next in list. */
};
#endif
/* Possible values for `ai_flags' field in `addrinfo' structure. */
#ifndef AI_PASSIVE
# define AI_PASSIVE 0x0001 /* Socket address is intended for `bind'. */
#endif
#ifndef AI_CANONNAME
# define AI_CANONNAME 0x0002 /* Request for canonical name. */
#endif
#ifndef AI_NUMERICSERV
# define AI_NUMERICSERV 0x0400 /* Don't use name resolution. */
#endif
#if 0
/* The commented out definitions below are not yet implemented in the
GNULIB getaddrinfo() replacement, so are not yet needed and may, in fact,
cause conflicts on systems with a getaddrinfo() function which does not
define them.
If they are restored, be sure to protect the definitions with #ifndef. */
#define AI_NUMERICHOST 0x0004 /* Don't use name resolution. */
#define AI_V4MAPPED 0x0008 /* IPv4 mapped addresses are acceptable. */
#define AI_ALL 0x0010 /* Return IPv4 mapped and IPv6 addresses. */
#define AI_ADDRCONFIG 0x0020 /* Use configuration of this host to choose
returned address type.. */
#endif /* 0 */
/* Error values for `getaddrinfo' function. */
#ifndef EAI_BADFLAGS
# define EAI_BADFLAGS -1 /* Invalid value for `ai_flags' field. */
# define EAI_NONAME -2 /* NAME or SERVICE is unknown. */
# define EAI_AGAIN -3 /* Temporary failure in name resolution. */
# define EAI_FAIL -4 /* Non-recoverable failure in name res. */
# define EAI_NODATA -5 /* No address associated with NAME. */
# define EAI_FAMILY -6 /* `ai_family' not supported. */
# define EAI_SOCKTYPE -7 /* `ai_socktype' not supported. */
# define EAI_SERVICE -8 /* SERVICE not supported for `ai_socktype'. */
# define EAI_MEMORY -10 /* Memory allocation failure. */
#endif
/* Since EAI_NODATA is deprecated by RFC3493, some systems (at least
FreeBSD, which does define EAI_BADFLAGS) have removed the definition
in favor of EAI_NONAME. */
#if !defined EAI_NODATA && defined EAI_NONAME
# define EAI_NODATA EAI_NONAME
#endif
#ifndef EAI_OVERFLOW
/* Not defined on mingw32. */
# define EAI_OVERFLOW -12 /* Argument buffer overflow. */
#endif
#ifndef EAI_ADDRFAMILY
/* Not defined on mingw32. */
# define EAI_ADDRFAMILY -9 /* Address family for NAME not supported. */
#endif
#ifndef EAI_SYSTEM
/* Not defined on mingw32. */
# define EAI_SYSTEM -11 /* System error returned in `errno'. */
#endif
#ifdef __USE_GNU
# ifndef EAI_INPROGRESS
# define EAI_INPROGRESS -100 /* Processing request in progress. */
# define EAI_CANCELED -101 /* Request canceled. */
# define EAI_NOTCANCELED -102 /* Request not canceled. */
# define EAI_ALLDONE -103 /* All requests done. */
# define EAI_INTR -104 /* Interrupted by a signal. */
# define EAI_IDN_ENCODE -105 /* IDN encoding failed. */
# endif
#endif
#if !HAVE_DECL_GETADDRINFO
/* Translate name of a service location and/or a service name to set of
socket addresses.
For more details, see the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/getaddrinfo.html>. */
extern int getaddrinfo (const char *restrict nodename,
const char *restrict servname,
const struct addrinfo *restrict hints,
struct addrinfo **restrict res);
#endif
#if !HAVE_DECL_FREEADDRINFO
/* Free `addrinfo' structure AI including associated storage.
For more details, see the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/getaddrinfo.html>. */
extern void freeaddrinfo (struct addrinfo *ai);
#endif
#if !HAVE_DECL_GAI_STRERROR
/* Convert error return from getaddrinfo() to a string.
For more details, see the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/gai_strerror.html>. */
extern const char *gai_strerror (int ecode);
#endif
#if !HAVE_DECL_GETNAMEINFO
/* Convert socket address to printable node and service names.
For more details, see the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/getnameinfo.html>. */
extern int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
char *restrict node, socklen_t nodelen,
char *restrict service, socklen_t servicelen,
int flags);
#endif
/* Possible flags for getnameinfo. */
#ifndef NI_NUMERICHOST
# define NI_NUMERICHOST 1
#endif
#ifndef NI_NUMERICSERV
# define NI_NUMERICSERV 2
#endif
#endif /* GETADDRINFO_H */
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