1/* $NetBSD: netdb.h,v 1.72 2024/02/16 11:13:59 jkoshy Exp $ */ 2 3/* 4 * ++Copyright++ 1980, 1983, 1988, 1993 5 * - 6 * Copyright (c) 1980, 1983, 1988, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * - 33 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 34 * 35 * Permission to use, copy, modify, and distribute this software for any 36 * purpose with or without fee is hereby granted, provided that the above 37 * copyright notice and this permission notice appear in all copies, and that 38 * the name of Digital Equipment Corporation not be used in advertising or 39 * publicity pertaining to distribution of the document or software without 40 * specific, written prior permission. 41 * 42 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 43 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 44 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 45 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 46 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 47 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 48 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 49 * SOFTWARE. 50 * - 51 * Portions Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 52 * All rights reserved. 53 * 54 * Redistribution and use in source and binary forms, with or without 55 * modification, are permitted provided that the following conditions 56 * are met: 57 * 1. Redistributions of source code must retain the above copyright 58 * notice, this list of conditions and the following disclaimer. 59 * 2. Redistributions in binary form must reproduce the above copyright 60 * notice, this list of conditions and the following disclaimer in the 61 * documentation and/or other materials provided with the distribution. 62 * 3. All advertising materials mentioning features or use of this software 63 * must display the following acknowledgement: 64 * This product includes software developed by WIDE Project and 65 * its contributors. 66 * 4. Neither the name of the project nor the names of its contributors 67 * may be used to endorse or promote products derived from this software 68 * without specific prior written permission. 69 * 70 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 71 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 72 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 73 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 74 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 75 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 76 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 77 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 78 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 79 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 80 * SUCH DAMAGE. 81 * - 82 * --Copyright-- 83 */ 84 85/* 86 * @(#)netdb.h 8.1 (Berkeley) 6/2/93 87 * Id: netdb.h,v 1.22 2008/02/28 05:34:17 marka Exp 88 */ 89 90#ifndef _NETDB_H_ 91#define _NETDB_H_ 92 93#include <sys/cdefs.h> 94#include <machine/endian_machdep.h> 95#include <sys/ansi.h> 96#include <sys/featuretest.h> 97#include <inttypes.h> 98/* 99 * Data types 100 */ 101#ifndef socklen_t 102typedef __socklen_t socklen_t; 103#define socklen_t __socklen_t 104#endif 105 106#ifdef _BSD_SIZE_T_ 107typedef _BSD_SIZE_T_ size_t; 108#undef _BSD_SIZE_T_ 109#endif 110 111#if defined(_NETBSD_SOURCE) 112#ifndef _PATH_HEQUIV 113#define _PATH_HEQUIV "/etc/hosts.equiv" 114#endif 115#ifndef _PATH_HOSTS 116#define _PATH_HOSTS "/etc/hosts" 117#endif 118#ifndef _PATH_NETWORKS 119#define _PATH_NETWORKS "/etc/networks" 120#endif 121#ifndef _PATH_PROTOCOLS 122#define _PATH_PROTOCOLS "/etc/protocols" 123#endif 124#ifndef _PATH_SERVICES 125#define _PATH_SERVICES "/etc/services" 126#endif 127#ifndef _PATH_SERVICES_CDB 128#define _PATH_SERVICES_CDB "/var/db/services.cdb" 129#endif 130#ifndef _PATH_SERVICES_DB 131#define _PATH_SERVICES_DB "/var/db/services.db" 132#endif 133#endif 134 135__BEGIN_DECLS 136extern int h_errno; 137extern int * __h_errno(void); 138#ifdef _REENTRANT 139#define h_errno (*__h_errno()) 140#endif 141__END_DECLS 142 143/*% 144 * Structures returned by network data base library. All addresses are 145 * supplied in host order, and returned in network order (suitable for 146 * use in system calls). 147 */ 148struct hostent { 149 char *h_name; /*%< official name of host */ 150 char **h_aliases; /*%< alias list */ 151 int h_addrtype; /*%< host address type */ 152 int h_length; /*%< length of address */ 153 char **h_addr_list; /*%< list of addresses from name server */ 154#define h_addr h_addr_list[0] /*%< address, for backward compatibility */ 155}; 156 157/*% 158 * Assumption here is that a network number 159 * fits in an unsigned long -- probably a poor one. 160 */ 161struct netent { 162 char *n_name; /*%< official name of net */ 163 char **n_aliases; /*%< alias list */ 164 int n_addrtype; /*%< net address type */ 165#if defined(__sparc__) && defined(_LP64) 166 int __n_pad0; /* ABI compatibility */ 167#endif 168 uint32_t n_net; /*%< network # */ 169#if defined(__alpha__) 170 int __n_pad0; /* ABI compatibility */ 171#endif 172}; 173 174struct servent { 175 char *s_name; /*%< official service name */ 176 char **s_aliases; /*%< alias list */ 177 int s_port; /*%< port # */ 178 char *s_proto; /*%< protocol to use */ 179}; 180 181struct protoent { 182 char *p_name; /*%< official protocol name */ 183 char **p_aliases; /*%< alias list */ 184 int p_proto; /*%< protocol # */ 185}; 186 187/* 188 * Note: ai_addrlen used to be a size_t, per RFC 2553. 189 * In XNS5.2, and subsequently in POSIX-2001 and 190 * draft-ietf-ipngwg-rfc2553bis-02.txt it was changed to a socklen_t. 191 * To accommodate for this while preserving binary compatibility with the 192 * old interface, we prepend or append 32 bits of padding, depending on 193 * the (LP64) architecture's endianness. 194 * 195 * This should be deleted the next time the libc major number is 196 * incremented. 197 */ 198#if (_POSIX_C_SOURCE - 0) >= 200112L || (_XOPEN_SOURCE - 0) >= 520 || \ 199 defined(_NETBSD_SOURCE) 200struct addrinfo { 201 int ai_flags; /*%< AI_PASSIVE, AI_CANONNAME */ 202 int ai_family; /*%< PF_xxx */ 203 int ai_socktype; /*%< SOCK_xxx */ 204 int ai_protocol; /*%< 0 or IPPROTO_xxx for IPv4 and IPv6 */ 205#if defined(__sparc__) && defined(_LP64) 206 int __ai_pad0; /* ABI compatibility */ 207#endif 208 socklen_t ai_addrlen; /*%< length of ai_addr */ 209#if defined(__alpha__) 210 int __ai_pad0; /* ABI compatibility */ 211#endif 212 char *ai_canonname; /*%< canonical name for hostname */ 213 struct sockaddr *ai_addr; /*%< binary address */ 214 struct addrinfo *ai_next; /*%< next structure in linked list */ 215}; 216#endif 217 218/*% 219 * Error return codes from gethostbyname() and gethostbyaddr() 220 * (left in extern int h_errno). 221 */ 222 223#if defined(_NETBSD_SOURCE) 224#define NETDB_INTERNAL -1 /*%< see errno */ 225#define NETDB_SUCCESS 0 /*%< no problem */ 226#endif 227#define NO_ADDRESS NO_DATA /* no address, look for MX record */ 228#define HOST_NOT_FOUND 1 /*%< Authoritative Answer Host not found */ 229#define TRY_AGAIN 2 /*%< Non-Authoritive Host not found, or SERVERFAIL */ 230#define NO_RECOVERY 3 /*%< Non recoverable errors, FORMERR, REFUSED, NOTIMP */ 231#define NO_DATA 4 /*%< Valid name, no data record of requested type */ 232#if defined(_NETBSD_SOURCE) 233#define NO_ADDRESS NO_DATA /*%< no address, look for MX record */ 234#endif 235 236/* 237 * Error return codes from getaddrinfo() 238 */ 239#if (_POSIX_C_SOURCE - 0) >= 200112L || (_XOPEN_SOURCE - 0) >= 520 || \ 240 defined(_NETBSD_SOURCE) 241#define EAI_ADDRFAMILY 1 /*%< address family for hostname not supported */ 242#define EAI_AGAIN 2 /*%< temporary failure in name resolution */ 243#define EAI_BADFLAGS 3 /*%< invalid value for ai_flags */ 244#define EAI_FAIL 4 /*%< non-recoverable failure in name resolution */ 245#define EAI_FAMILY 5 /*%< ai_family not supported */ 246#define EAI_MEMORY 6 /*%< memory allocation failure */ 247#define EAI_NODATA 7 /*%< no address associated with hostname */ 248#define EAI_NONAME 8 /*%< hostname nor servname provided, or not known */ 249#define EAI_SERVICE 9 /*%< servname not supported for ai_socktype */ 250#define EAI_SOCKTYPE 10 /*%< ai_socktype not supported */ 251#define EAI_SYSTEM 11 /*%< system error returned in errno */ 252#define EAI_BADHINTS 12 /* invalid value for hints */ 253#define EAI_PROTOCOL 13 /* resolved protocol is unknown */ 254#define EAI_OVERFLOW 14 /* argument buffer overflow */ 255#define EAI_MAX 15 256#endif /* _POSIX_C_SOURCE >= 200112 || _XOPEN_SOURCE >= 520 || _NETBSD_SOURCE */ 257 258/*% 259 * Flag values for getaddrinfo() 260 */ 261#if (_POSIX_C_SOURCE - 0) >= 200112L || (_XOPEN_SOURCE - 0) >= 520 || \ 262 defined(_NETBSD_SOURCE) 263#define AI_PASSIVE 0x00000001 /* get address to use bind() */ 264#define AI_CANONNAME 0x00000002 /* fill ai_canonname */ 265#define AI_NUMERICHOST 0x00000004 /* prevent host name resolution */ 266#define AI_NUMERICSERV 0x00000008 /* prevent service name resolution */ 267#define AI_ADDRCONFIG 0x00000400 /* only if any address is assigned */ 268/* valid flags for addrinfo (not a standard def, apps should not use it) */ 269#ifdef _NETBSD_SOURCE 270#define AI_SRV 0x00000800 /* do _srv lookups */ 271#define AI_MASK \ 272 (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_NUMERICSERV | \ 273 AI_ADDRCONFIG | AI_SRV) 274#else 275#define AI_MASK \ 276 (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_NUMERICSERV | \ 277 AI_ADDRCONFIG) 278#endif 279#endif 280 281#if (_POSIX_C_SOURCE - 0) >= 200112L || (_XOPEN_SOURCE - 0) >= 520 || \ 282 defined(_NETBSD_SOURCE) 283/*% 284 * Constants for getnameinfo() 285 */ 286#if defined(_NETBSD_SOURCE) 287#define NI_MAXHOST 1025 288#define NI_MAXSERV 32 289#endif 290 291/*% 292 * Flag values for getnameinfo() 293 */ 294#define NI_NOFQDN 0x00000001 295#define NI_NUMERICHOST 0x00000002 296#define NI_NAMEREQD 0x00000004 297#define NI_NUMERICSERV 0x00000008 298#define NI_DGRAM 0x00000010 299#define NI_WITHSCOPEID 0x00000020 /* Obsolete. */ 300#define NI_NUMERICSCOPE 0x00000040 301 302/*% 303 * Scope delimit character 304 */ 305#if defined(_NETBSD_SOURCE) 306#define SCOPE_DELIMITER '%' 307#endif 308#endif /* (_POSIX_C_SOURCE - 0) >= 200112L || ... */ 309 310__BEGIN_DECLS 311void endhostent(void); 312void endnetent(void); 313void endprotoent(void); 314void endservent(void); 315#if (_XOPEN_SOURCE - 0) >= 520 && (_XOPEN_SOURCE - 0) < 600 || \ 316 defined(_NETBSD_SOURCE) 317#if 0 /* we do not ship this */ 318void freehostent(struct hostent *); 319#endif 320#endif 321struct hostent *gethostbyaddr(const void *, socklen_t, int); 322struct hostent *gethostbyname(const char *); 323#if defined(_NETBSD_SOURCE) 324struct hostent *gethostbyname2(const char *, int); 325#endif 326struct hostent *gethostent(void); 327struct netent *getnetbyaddr(uint32_t, int); 328struct netent *getnetbyname(const char *); 329struct netent *getnetent(void); 330struct protoent *getprotobyname(const char *); 331struct protoent *getprotobynumber(int); 332struct protoent *getprotoent(void); 333struct servent *getservbyname(const char *, const char *); 334struct servent *getservbyport(int, const char *); 335struct servent *getservent(void); 336#if defined(_NETBSD_SOURCE) 337void herror(const char *); 338const char *hstrerror(int); 339#endif 340void sethostent(int); 341#if defined(_NETBSD_SOURCE) 342/* void sethostfile(const char *); */ 343#endif 344void setnetent(int); 345void setprotoent(int); 346void setservent(int); 347#if (_POSIX_C_SOURCE - 0) >= 200112L || (_XOPEN_SOURCE - 0) >= 520 || \ 348 defined(_NETBSD_SOURCE) 349int getaddrinfo(const char * __restrict, const char * __restrict, 350 const struct addrinfo * __restrict, 351 struct addrinfo ** __restrict); 352int getnameinfo(const struct sockaddr * __restrict, socklen_t, 353 char * __restrict, socklen_t, 354 char * __restrict, socklen_t, int); 355struct addrinfo *allocaddrinfo(socklen_t); 356void freeaddrinfo(struct addrinfo *); 357const char *gai_strerror(int); 358#endif 359__END_DECLS 360 361#endif /* !_NETDB_H_ */ 362