1 /* Get address information.
2 Copyright (C) 1996-2002, 2003, 2004, 2005, 2006, 2008
3 Free Software Foundation, Inc.
4 Contributed by Simon Josefsson <simon@josefsson.org>.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software Foundation,
18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
23 /* sys/socket.h in i386-unknown-freebsd4.10 and
24 powerpc-apple-darwin5.5 require sys/types.h, so include it first.
25 Then we'll also get 'socklen_t' and 'struct sockaddr' which are
27 #include <sys/types.h>
28 /* Get all getaddrinfo related declarations, if available. */
29 #include <sys/socket.h>
34 #ifndef HAVE_STRUCT_ADDRINFO
36 /* Structure to contain information about address of a service provider. */
39 int ai_flags; /* Input flags. */
40 int ai_family; /* Protocol family for socket. */
41 int ai_socktype; /* Socket type. */
42 int ai_protocol; /* Protocol for socket. */
43 socklen_t ai_addrlen; /* Length of socket address. */
44 struct sockaddr *ai_addr; /* Socket address for socket. */
45 char *ai_canonname; /* Canonical name for service location. */
46 struct addrinfo *ai_next; /* Pointer to next in list. */
50 /* Possible values for `ai_flags' field in `addrinfo' structure. */
52 # define AI_PASSIVE 0x0001 /* Socket address is intended for `bind'. */
55 # define AI_CANONNAME 0x0002 /* Request for canonical name. */
57 #ifndef AI_NUMERICSERV
58 # define AI_NUMERICSERV 0x0400 /* Don't use name resolution. */
62 /* The commented out definitions below are not yet implemented in the
63 GNULIB getaddrinfo() replacement, so are not yet needed and may, in fact,
64 cause conflicts on systems with a getaddrinfo() function which does not
67 If they are restored, be sure to protect the definitions with #ifndef. */
68 #define AI_NUMERICHOST 0x0004 /* Don't use name resolution. */
69 #define AI_V4MAPPED 0x0008 /* IPv4 mapped addresses are acceptable. */
70 #define AI_ALL 0x0010 /* Return IPv4 mapped and IPv6 addresses. */
71 #define AI_ADDRCONFIG 0x0020 /* Use configuration of this host to choose
72 returned address type.. */
75 /* Error values for `getaddrinfo' function. */
77 # define EAI_BADFLAGS -1 /* Invalid value for `ai_flags' field. */
78 # define EAI_NONAME -2 /* NAME or SERVICE is unknown. */
79 # define EAI_AGAIN -3 /* Temporary failure in name resolution. */
80 # define EAI_FAIL -4 /* Non-recoverable failure in name res. */
81 # define EAI_NODATA -5 /* No address associated with NAME. */
82 # define EAI_FAMILY -6 /* `ai_family' not supported. */
83 # define EAI_SOCKTYPE -7 /* `ai_socktype' not supported. */
84 # define EAI_SERVICE -8 /* SERVICE not supported for `ai_socktype'. */
85 # define EAI_MEMORY -10 /* Memory allocation failure. */
88 /* Since EAI_NODATA is deprecated by RFC3493, some systems (at least
89 FreeBSD, which does define EAI_BADFLAGS) have removed the definition
90 in favor of EAI_NONAME. */
91 #if !defined EAI_NODATA && defined EAI_NONAME
92 # define EAI_NODATA EAI_NONAME
96 /* Not defined on mingw32. */
97 # define EAI_OVERFLOW -12 /* Argument buffer overflow. */
99 #ifndef EAI_ADDRFAMILY
100 /* Not defined on mingw32. */
101 # define EAI_ADDRFAMILY -9 /* Address family for NAME not supported. */
104 /* Not defined on mingw32. */
105 # define EAI_SYSTEM -11 /* System error returned in `errno'. */
109 # ifndef EAI_INPROGRESS
110 # define EAI_INPROGRESS -100 /* Processing request in progress. */
111 # define EAI_CANCELED -101 /* Request canceled. */
112 # define EAI_NOTCANCELED -102 /* Request not canceled. */
113 # define EAI_ALLDONE -103 /* All requests done. */
114 # define EAI_INTR -104 /* Interrupted by a signal. */
115 # define EAI_IDN_ENCODE -105 /* IDN encoding failed. */
119 #if !HAVE_DECL_GETADDRINFO
120 /* Translate name of a service location and/or a service name to set of
122 For more details, see the POSIX:2001 specification
123 <http://www.opengroup.org/susv3xsh/getaddrinfo.html>. */
124 extern int getaddrinfo (const char *restrict nodename,
125 const char *restrict servname,
126 const struct addrinfo *restrict hints,
127 struct addrinfo **restrict res);
130 #if !HAVE_DECL_FREEADDRINFO
131 /* Free `addrinfo' structure AI including associated storage.
132 For more details, see the POSIX:2001 specification
133 <http://www.opengroup.org/susv3xsh/getaddrinfo.html>. */
134 extern void freeaddrinfo (struct addrinfo *ai);
137 #if !HAVE_DECL_GAI_STRERROR
138 /* Convert error return from getaddrinfo() to a string.
139 For more details, see the POSIX:2001 specification
140 <http://www.opengroup.org/susv3xsh/gai_strerror.html>. */
141 extern const char *gai_strerror (int ecode);
144 #if !HAVE_DECL_GETNAMEINFO
145 /* Convert socket address to printable node and service names.
146 For more details, see the POSIX:2001 specification
147 <http://www.opengroup.org/susv3xsh/getnameinfo.html>. */
148 extern int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
149 char *restrict node, socklen_t nodelen,
150 char *restrict service, socklen_t servicelen,
155 /* Possible flags for getnameinfo. */
156 #ifndef NI_NUMERICHOST
157 # define NI_NUMERICHOST 1
159 #ifndef NI_NUMERICSERV
160 # define NI_NUMERICSERV 2
163 #endif /* GETADDRINFO_H */