1/* Get address information. 2 Copyright (C) 1996-2002, 2003, 2004, 2005 Free Software Foundation, Inc. 3 Contributed by Simon Josefsson <simon@josefsson.org>. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2, or (at your option) 8 any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software Foundation, 17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 18 19#ifndef GETADDRINFO_H 20# define GETADDRINFO_H 21 22/* Get getaddrinfo declarations, if available. Also get 'socklen_t', 23 and 'struct sockaddr' via sys/types.h which are used below. */ 24# include <sys/types.h> 25# include <sys/socket.h> 26# include <netdb.h> 27 28# if !HAVE_GETADDRINFO 29 30/* Structure to contain information about address of a service provider. */ 31struct addrinfo 32{ 33 int ai_flags; /* Input flags. */ 34 int ai_family; /* Protocol family for socket. */ 35 int ai_socktype; /* Socket type. */ 36 int ai_protocol; /* Protocol for socket. */ 37 socklen_t ai_addrlen; /* Length of socket address. */ 38 struct sockaddr *ai_addr; /* Socket address for socket. */ 39 char *ai_canonname; /* Canonical name for service location. */ 40 struct addrinfo *ai_next; /* Pointer to next in list. */ 41}; 42 43/* Possible values for `ai_flags' field in `addrinfo' structure. */ 44# define AI_PASSIVE 0x0001 /* Socket address is intended for `bind'. */ 45# define AI_CANONNAME 0x0002 /* Request for canonical name. */ 46# define AI_NUMERICHOST 0x0004 /* Don't use name resolution. */ 47# define AI_V4MAPPED 0x0008 /* IPv4 mapped addresses are acceptable. */ 48# define AI_ALL 0x0010 /* Return IPv4 mapped and IPv6 addresses. */ 49# define AI_ADDRCONFIG 0x0020 /* Use configuration of this host to choose 50 returned address type.. */ 51 52/* Error values for `getaddrinfo' function. */ 53# define EAI_BADFLAGS -1 /* Invalid value for `ai_flags' field. */ 54# define EAI_NONAME -2 /* NAME or SERVICE is unknown. */ 55# define EAI_AGAIN -3 /* Temporary failure in name resolution. */ 56# define EAI_FAIL -4 /* Non-recoverable failure in name res. */ 57# define EAI_NODATA -5 /* No address associated with NAME. */ 58# define EAI_FAMILY -6 /* `ai_family' not supported. */ 59# define EAI_SOCKTYPE -7 /* `ai_socktype' not supported. */ 60# define EAI_SERVICE -8 /* SERVICE not supported for `ai_socktype'. */ 61# define EAI_ADDRFAMILY -9 /* Address family for NAME not supported. */ 62# define EAI_MEMORY -10 /* Memory allocation failure. */ 63# define EAI_SYSTEM -11 /* System error returned in `errno'. */ 64# define EAI_OVERFLOW -12 /* Argument buffer overflow. */ 65# ifdef __USE_GNU 66# define EAI_INPROGRESS -100 /* Processing request in progress. */ 67# define EAI_CANCELED -101 /* Request canceled. */ 68# define EAI_NOTCANCELED -102 /* Request not canceled. */ 69# define EAI_ALLDONE -103 /* All requests done. */ 70# define EAI_INTR -104 /* Interrupted by a signal. */ 71# define EAI_IDN_ENCODE -105 /* IDN encoding failed. */ 72# endif 73 74/* Translate name of a service location and/or a service name to set of 75 socket addresses. 76 For more details, see the POSIX:2001 specification 77 <http://www.opengroup.org/susv3xsh/getaddrinfo.html>. */ 78extern int getaddrinfo (const char *restrict nodename, 79 const char *restrict servname, 80 const struct addrinfo *restrict hints, 81 struct addrinfo **restrict res); 82 83/* Free `addrinfo' structure AI including associated storage. 84 For more details, see the POSIX:2001 specification 85 <http://www.opengroup.org/susv3xsh/getaddrinfo.html>. */ 86extern void freeaddrinfo (struct addrinfo *ai); 87 88/* Convert error return from getaddrinfo() to a string. 89 For more details, see the POSIX:2001 specification 90 <http://www.opengroup.org/susv3xsh/gai_strerror.html>. */ 91extern const char *gai_strerror (int ecode); 92 93# endif /* !HAVE_GETADDRINFO */ 94 95#endif /* GETADDRINFO_H */ 96