/* Get address information. Copyright (C) 1996-2002, 2003, 2004, 2005 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 /* Get getaddrinfo declarations, if available. Also get 'socklen_t', and 'struct sockaddr' via sys/types.h which are used below. */ # include <sys/types.h> # include <sys/socket.h> # include <netdb.h> # if !HAVE_GETADDRINFO /* 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. */ }; /* Possible values for `ai_flags' field in `addrinfo' structure. */ # define AI_PASSIVE 0x0001 /* Socket address is intended for `bind'. */ # define AI_CANONNAME 0x0002 /* Request for canonical name. */ # 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.. */ /* Error values for `getaddrinfo' function. */ # 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_ADDRFAMILY -9 /* Address family for NAME not supported. */ # define EAI_MEMORY -10 /* Memory allocation failure. */ # define EAI_SYSTEM -11 /* System error returned in `errno'. */ # define EAI_OVERFLOW -12 /* Argument buffer overflow. */ # ifdef __USE_GNU # 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 /* 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); /* 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); /* 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 /* !HAVE_GETADDRINFO */ #endif /* GETADDRINFO_H */