netdb.h revision 1.25
1/* $NetBSD: netdb.h,v 1.25 2002/05/14 14:35:36 kleink Exp $ */ 2 3/* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32/*- 33 * Copyright (c) 1980, 1983, 1988, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)netdb.h 8.1 (Berkeley) 6/2/93 65 * Id: netdb.h,v 4.9.1.2 1993/05/17 09:59:01 vixie Exp 66 * - 67 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 68 * 69 * Permission to use, copy, modify, and distribute this software for any 70 * purpose with or without fee is hereby granted, provided that the above 71 * copyright notice and this permission notice appear in all copies, and that 72 * the name of Digital Equipment Corporation not be used in advertising or 73 * publicity pertaining to distribution of the document or software without 74 * specific, written prior permission. 75 * 76 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 77 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 78 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 79 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 80 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 81 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 82 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 83 * SOFTWARE. 84 * - 85 * --Copyright-- 86 */ 87 88#ifndef _NETDB_H_ 89#define _NETDB_H_ 90 91#include <machine/ansi.h> 92#include <sys/ansi.h> 93#include <sys/cdefs.h> 94#include <inttypes.h> 95 96/* 97 * Data types 98 */ 99#ifndef socklen_t 100typedef __socklen_t socklen_t; 101#define socklen_t __socklen_t 102#endif 103 104#ifdef _BSD_SIZE_T_ 105typedef _BSD_SIZE_T_ size_t; 106#undef _BSD_SIZE_T_ 107#endif 108 109#if !defined(_XOPEN_SOURCE) 110#define _PATH_HEQUIV "/etc/hosts.equiv" 111#define _PATH_HOSTS "/etc/hosts" 112#define _PATH_NETWORKS "/etc/networks" 113#define _PATH_PROTOCOLS "/etc/protocols" 114#define _PATH_SERVICES "/etc/services" 115#endif 116 117extern int h_errno; 118 119/* 120 * Structures returned by network data base library. All addresses are 121 * supplied in host order, and returned in network order (suitable for 122 * use in system calls). 123 */ 124struct hostent { 125 char *h_name; /* official name of host */ 126 char **h_aliases; /* alias list */ 127 int h_addrtype; /* host address type */ 128 int h_length; /* length of address */ 129 char **h_addr_list; /* list of addresses from name server */ 130#define h_addr h_addr_list[0] /* address, for backward compatiblity */ 131}; 132 133/* 134 * Assumption here is that a network number 135 * fits in an unsigned long -- probably a poor one. 136 */ 137struct netent { 138 char *n_name; /* official name of net */ 139 char **n_aliases; /* alias list */ 140 int n_addrtype; /* net address type */ 141 unsigned long n_net; /* network # XXX */ 142}; 143 144struct servent { 145 char *s_name; /* official service name */ 146 char **s_aliases; /* alias list */ 147 int s_port; /* port # */ 148 char *s_proto; /* protocol to use */ 149}; 150 151struct protoent { 152 char *p_name; /* official protocol name */ 153 char **p_aliases; /* alias list */ 154 int p_proto; /* protocol # */ 155}; 156 157/* 158 * Note: ai_addrlen used to be a size_t, per RFC 2553. 159 * In XNS5.2, and subsequently in POSIX-2001 and 160 * draft-ietf-ipngwg-rfc2553bis-02.txt it was changed to a socklen_t. 161 * To accomodate for this while preserving binary compatibility with the 162 * old interface, we prepend or append 32 bits of padding, depending on 163 * the (LP64) architecture's endianness. 164 * 165 * This should be deleted the next time the libc major number is 166 * incremented. 167 */ 168#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 520 169struct addrinfo { 170 int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */ 171 int ai_family; /* PF_xxx */ 172 int ai_socktype; /* SOCK_xxx */ 173 int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */ 174#if defined(__sparc64__) 175 int __ai_pad0; 176#endif 177 socklen_t ai_addrlen; /* length of ai_addr */ 178#if defined(__alpha__) || (defined(__i386__) && defined(_LP64)) 179 int __ai_pad0; 180#endif 181 char *ai_canonname; /* canonical name for hostname */ 182 struct sockaddr *ai_addr; /* binary address */ 183 struct addrinfo *ai_next; /* next structure in linked list */ 184}; 185#endif 186 187/* 188 * Error return codes from gethostbyname() and gethostbyaddr() 189 * (left in extern int h_errno). 190 */ 191 192#if !defined(_XOPEN_SOURCE) 193#define NETDB_INTERNAL -1 /* see errno */ 194#define NETDB_SUCCESS 0 /* no problem */ 195#endif 196#define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */ 197#define TRY_AGAIN 2 /* Non-Authoritative Host not found, or SERVERFAIL */ 198#define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ 199#define NO_DATA 4 /* Valid name, no data record of requested type */ 200#if !defined(_XOPEN_SOURCE) 201#define NO_ADDRESS NO_DATA /* no address, look for MX record */ 202#endif 203 204/* 205 * Error return codes from getaddrinfo() 206 */ 207#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 520 208#define EAI_ADDRFAMILY 1 /* address family for hostname not supported */ 209#define EAI_AGAIN 2 /* temporary failure in name resolution */ 210#define EAI_BADFLAGS 3 /* invalid value for ai_flags */ 211#define EAI_FAIL 4 /* non-recoverable failure in name resolution */ 212#define EAI_FAMILY 5 /* ai_family not supported */ 213#define EAI_MEMORY 6 /* memory allocation failure */ 214#define EAI_NODATA 7 /* no address associated with hostname */ 215#define EAI_NONAME 8 /* hostname nor servname provided, or not known */ 216#define EAI_SERVICE 9 /* servname not supported for ai_socktype */ 217#define EAI_SOCKTYPE 10 /* ai_socktype not supported */ 218#define EAI_SYSTEM 11 /* system error returned in errno */ 219#define EAI_BADHINTS 12 220#define EAI_PROTOCOL 13 221#define EAI_MAX 14 222#endif /* !_XOPEN_SOURCE || (_XOPEN_SOURCE - 0) >= 520 */ 223 224/* 225 * Flag values for getaddrinfo() 226 */ 227#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 520 228#define AI_PASSIVE 0x00000001 /* get address to use bind() */ 229#define AI_CANONNAME 0x00000002 /* fill ai_canonname */ 230#define AI_NUMERICHOST 0x00000004 /* prevent name resolution */ 231/* valid flags for addrinfo */ 232#define AI_MASK (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST) 233#endif 234 235#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 520 236#define AI_ALL 0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */ 237#endif 238#if !defined(_XOPEN_SOURCE) 239#define AI_V4MAPPED_CFG 0x00000200 /* accept IPv4-mapped if kernel supports */ 240#endif 241#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 520 242#define AI_ADDRCONFIG 0x00000400 /* only if any address is assigned */ 243#define AI_V4MAPPED 0x00000800 /* accept IPv4-mapped IPv6 address */ 244#endif 245#if !defined(_XOPEN_SOURCE) 246/* special recommended flags for getipnodebyname */ 247#define AI_DEFAULT (AI_V4MAPPED_CFG | AI_ADDRCONFIG) 248#endif 249 250#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 520 251/* 252 * Constants for getnameinfo() 253 */ 254#if !defined(_XOPEN_SOURCE) 255#define NI_MAXHOST 1025 256#define NI_MAXSERV 32 257#endif 258 259/* 260 * Flag values for getnameinfo() 261 */ 262#define NI_NOFQDN 0x00000001 263#define NI_NUMERICHOST 0x00000002 264#define NI_NAMEREQD 0x00000004 265#define NI_NUMERICSERV 0x00000008 266#define NI_DGRAM 0x00000010 267#if !defined(_XOPEN_SOURCE) 268#define NI_WITHSCOPEID 0x00000020 /*KAME extension*/ 269#endif 270 271/* 272 * Scope delimit character 273 */ 274#if !defined(_XOPEN_SOURCE) 275#define SCOPE_DELIMITER '%' /*KAME extension*/ 276#endif 277#endif /* !_XOPEN_SOURCE || (_XOPEN_SOURCE - 0) >= 520 */ 278 279__BEGIN_DECLS 280void endhostent __P((void)); 281void endnetent __P((void)); 282void endprotoent __P((void)); 283void endservent __P((void)); 284#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 500 285void freehostent __P((struct hostent *)); 286#endif 287struct hostent *gethostbyaddr __P((const char *, socklen_t, int)); 288struct hostent *gethostbyname __P((const char *)); 289#if !defined(_XOPEN_SOURCE) 290struct hostent *gethostbyname2 __P((const char *, int)); 291#endif 292struct hostent *gethostent __P((void)); 293#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 520 294#if 0 /* we do not ship these */ 295struct hostent *getipnodebyaddr __P((const void *, size_t, int, int *)); 296struct hostent *getipnodebyname __P((const char *, int, int, int *)); 297#endif 298#endif 299struct netent *getnetbyaddr __P((unsigned long, int)); 300struct netent *getnetbyname __P((const char *)); 301struct netent *getnetent __P((void)); 302struct protoent *getprotobyname __P((const char *)); 303struct protoent *getprotobynumber __P((int)); 304struct protoent *getprotoent __P((void)); 305struct servent *getservbyname __P((const char *, const char *)); 306struct servent *getservbyport __P((int, const char *)); 307struct servent *getservent __P((void)); 308#if !defined(_XOPEN_SOURCE) 309void herror __P((const char *)); 310const char *hstrerror __P((int)); 311#endif 312void sethostent __P((int)); 313#if !defined(_XOPEN_SOURCE) 314/* void sethostfile __P((const char *)); */ 315#endif 316void setnetent __P((int)); 317void setprotoent __P((int)); 318#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 520 319int getaddrinfo __P((const char *, const char *, 320 const struct addrinfo *, struct addrinfo **)); 321int getnameinfo __P((const struct sockaddr *, socklen_t, char *, 322 socklen_t, char *, socklen_t, unsigned int)); 323void freeaddrinfo __P((struct addrinfo *)); 324char *gai_strerror __P((int)); 325#endif 326void setservent __P((int)); 327__END_DECLS 328 329#endif /* !_NETDB_H_ */ 330