1 /* $OpenBSD: netdb.h,v 1.31 2012/09/15 00:47:08 guenther 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 * --Copyright-- 52 */ 53 54 /* 55 * Copyright (c) 1995, 1996, 1997, 1998, 1999 Craig Metz. All rights reserved. 56 * 57 * Redistribution and use in source and binary forms, with or without 58 * modification, are permitted provided that the following conditions 59 * are met: 60 * 1. Redistributions of source code must retain the above copyright 61 * notice, this list of conditions and the following disclaimer. 62 * 2. Redistributions in binary form must reproduce the above copyright 63 * notice, this list of conditions and the following disclaimer in the 64 * documentation and/or other materials provided with the distribution. 65 * 3. Neither the name of the author nor the names of any contributors 66 * may be used to endorse or promote products derived from this software 67 * without specific prior written permission. 68 * 69 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 70 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 71 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 72 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 73 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 74 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 75 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 76 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 77 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 78 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 79 * SUCH DAMAGE. 80 */ 81 82 /* 83 * @(#)netdb.h 8.1 (Berkeley) 6/2/93 84 * $From: netdb.h,v 8.7 1996/05/09 05:59:09 vixie Exp $ 85 */ 86 87 #ifndef _NETDB_H_ 88 #define _NETDB_H_ 89 90 #include <sys/cdefs.h> 91 92 #if __BSD_VISIBLE 93 #include <sys/param.h> 94 #endif 95 #include <netinet/in.h> 96 97 #ifndef _SOCKLEN_T_DEFINED_ 98 #define _SOCKLEN_T_DEFINED_ 99 typedef __socklen_t socklen_t; /* length type for network syscalls */ 100 #endif 101 102 #define _PATH_HEQUIV "/etc/hosts.equiv" 103 #define _PATH_HOSTS "/etc/hosts" 104 #define _PATH_NETWORKS "/etc/networks" 105 #define _PATH_PROTOCOLS "/etc/protocols" 106 #define _PATH_SERVICES "/etc/services" 107 108 /* 109 * Structures returned by network data base library. All addresses are 110 * supplied in host order, and returned in network order (suitable for 111 * use in system calls). 112 */ 113 struct hostent { 114 char *h_name; /* official name of host */ 115 char **h_aliases; /* alias list */ 116 int h_addrtype; /* host address type */ 117 int h_length; /* length of address */ 118 char **h_addr_list; /* list of addresses from name server */ 119 #define h_addr h_addr_list[0] /* address, for backward compatibility */ 120 }; 121 122 /* 123 * Assumption here is that a network number 124 * fits in an in_addr_t -- probably a poor one. 125 */ 126 struct netent { 127 char *n_name; /* official name of net */ 128 char **n_aliases; /* alias list */ 129 int n_addrtype; /* net address type */ 130 in_addr_t n_net; /* network # */ 131 }; 132 133 struct servent { 134 char *s_name; /* official service name */ 135 char **s_aliases; /* alias list */ 136 int s_port; /* port # */ 137 char *s_proto; /* protocol to use */ 138 }; 139 140 struct protoent { 141 char *p_name; /* official protocol name */ 142 char **p_aliases; /* alias list */ 143 int p_proto; /* protocol # */ 144 }; 145 146 #if __BSD_VISIBLE || __POSIX_VISIBLE < 200809 147 extern int h_errno; 148 149 /* 150 * Error return codes from gethostbyname() and gethostbyaddr() 151 * (left in extern int h_errno). 152 */ 153 154 #define NETDB_INTERNAL -1 /* see errno */ 155 #define NETDB_SUCCESS 0 /* no problem */ 156 #define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */ 157 #define TRY_AGAIN 2 /* Non-Authoritative Host not found, or SERVERFAIL */ 158 #define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ 159 #define NO_DATA 4 /* Valid name, no data record of requested type */ 160 #define NO_ADDRESS NO_DATA /* no address */ 161 #endif /* __BSD_VISIBLE || __POSIX_VISIBLE < 200809 */ 162 163 /* Values for getaddrinfo() and getnameinfo() */ 164 #define AI_PASSIVE 1 /* socket address is intended for bind() */ 165 #define AI_CANONNAME 2 /* request for canonical name */ 166 #define AI_NUMERICHOST 4 /* don't ever try hostname lookup */ 167 #define AI_EXT 8 /* enable non-portable extensions */ 168 #define AI_NUMERICSERV 16 /* don't ever try servname lookup */ 169 #define AI_FQDN 32 /* return the FQDN that was resolved */ 170 /* valid flags for addrinfo */ 171 #define AI_MASK \ 172 (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_NUMERICSERV | AI_FQDN) 173 174 #define NI_NUMERICHOST 1 /* return the host address, not the name */ 175 #define NI_NUMERICSERV 2 /* return the service address, not the name */ 176 #define NI_NOFQDN 4 /* return a short name if in the local domain */ 177 #define NI_NAMEREQD 8 /* fail if either host or service name is unknown */ 178 #define NI_DGRAM 16 /* look up datagram service instead of stream */ 179 /* #define NI_NUMERICSCOPE 32 return the scope number, not the name */ 180 181 #if __BSD_VISIBLE 182 #define NI_MAXHOST MAXHOSTNAMELEN /* max host name returned by getnameinfo */ 183 #define NI_MAXSERV 32 /* max serv. name length returned by getnameinfo */ 184 185 /* 186 * Scope delimit character (KAME hack) 187 */ 188 #define SCOPE_DELIMITER '%' 189 #endif 190 191 #define EAI_BADFLAGS -1 /* invalid value for ai_flags */ 192 #define EAI_NONAME -2 /* name or service is not known */ 193 #define EAI_AGAIN -3 /* temporary failure in name resolution */ 194 #define EAI_FAIL -4 /* non-recoverable failure in name resolution */ 195 #define EAI_NODATA -5 /* no address associated with name */ 196 #define EAI_FAMILY -6 /* ai_family not supported */ 197 #define EAI_SOCKTYPE -7 /* ai_socktype not supported */ 198 #define EAI_SERVICE -8 /* service not supported for ai_socktype */ 199 #define EAI_ADDRFAMILY -9 /* address family for name not supported */ 200 #define EAI_MEMORY -10 /* memory allocation failure */ 201 #define EAI_SYSTEM -11 /* system error (code indicated in errno) */ 202 #define EAI_BADHINTS -12 /* invalid value for hints */ 203 #define EAI_PROTOCOL -13 /* resolved protocol is unknown */ 204 #define EAI_OVERFLOW -14 /* argument buffer overflow */ 205 206 struct addrinfo { 207 int ai_flags; /* input flags */ 208 int ai_family; /* protocol family for socket */ 209 int ai_socktype; /* socket type */ 210 int ai_protocol; /* protocol for socket */ 211 socklen_t ai_addrlen; /* length of socket-address */ 212 struct sockaddr *ai_addr; /* socket-address for socket */ 213 char *ai_canonname; /* canonical name for service location (iff req) */ 214 struct addrinfo *ai_next; /* pointer to next in list */ 215 }; 216 217 #if __BSD_VISIBLE 218 /* 219 * Flags for getrrsetbyname() 220 */ 221 #define RRSET_VALIDATED 1 222 223 /* 224 * Return codes for getrrsetbyname() 225 */ 226 #define ERRSET_SUCCESS 0 227 #define ERRSET_NOMEMORY 1 228 #define ERRSET_FAIL 2 229 #define ERRSET_INVAL 3 230 #define ERRSET_NONAME 4 231 #define ERRSET_NODATA 5 232 233 /* 234 * Structures used by getrrsetbyname() and freerrset() 235 */ 236 struct rdatainfo { 237 unsigned int rdi_length; /* length of data */ 238 unsigned char *rdi_data; /* record data */ 239 }; 240 241 struct rrsetinfo { 242 unsigned int rri_flags; /* RRSET_VALIDATED ... */ 243 unsigned int rri_rdclass; /* class number */ 244 unsigned int rri_rdtype; /* RR type number */ 245 unsigned int rri_ttl; /* time to live */ 246 unsigned int rri_nrdatas; /* size of rdatas array */ 247 unsigned int rri_nsigs; /* size of sigs array */ 248 char *rri_name; /* canonical name */ 249 struct rdatainfo *rri_rdatas; /* individual records */ 250 struct rdatainfo *rri_sigs; /* individual signatures */ 251 }; 252 253 struct servent_data { 254 void *fp; 255 char **aliases; 256 int maxaliases; 257 int stayopen; 258 char *line; 259 }; 260 261 struct protoent_data { 262 void *fp; 263 char **aliases; 264 int maxaliases; 265 int stayopen; 266 char *line; 267 }; 268 #endif 269 270 __BEGIN_DECLS 271 void endhostent(void); 272 void endnetent(void); 273 void endprotoent(void); 274 void endservent(void); 275 #if __BSD_VISIBLE || __POSIX_VISIBLE < 200809 276 struct hostent *gethostbyaddr(const void *, socklen_t, int); 277 struct hostent *gethostbyname(const char *); 278 #endif 279 #if __BSD_VISIBLE 280 struct hostent *gethostbyname2(const char *, int); 281 #endif 282 struct hostent *gethostent(void); 283 struct netent *getnetbyaddr(in_addr_t, int); 284 struct netent *getnetbyname(const char *); 285 struct netent *getnetent(void); 286 struct protoent *getprotobyname(const char *); 287 struct protoent *getprotobynumber(int); 288 struct protoent *getprotoent(void); 289 struct servent *getservbyname(const char *, const char *); 290 struct servent *getservbyport(int, const char *); 291 struct servent *getservent(void); 292 #if __BSD_VISIBLE 293 void herror(const char *); 294 const char *hstrerror(int); 295 #endif 296 void sethostent(int); 297 /* void sethostfile(const char *); */ 298 void setnetent(int); 299 void setprotoent(int); 300 void setservent(int); 301 302 #if __BSD_VISIBLE 303 void endprotoent_r(struct protoent_data *); 304 void endservent_r(struct servent_data *); 305 int getprotobyname_r(const char *, struct protoent *, 306 struct protoent_data *); 307 int getprotobynumber_r(int, struct protoent *, 308 struct protoent_data *); 309 int getservbyname_r(const char *, const char *, struct servent *, 310 struct servent_data *); 311 int getservbyport_r(int, const char *, struct servent *, 312 struct servent_data *); 313 int getservent_r(struct servent *, struct servent_data *); 314 int getprotoent_r(struct protoent *, struct protoent_data *); 315 void setprotoent_r(int, struct protoent_data *); 316 void setservent_r(int, struct servent_data *); 317 #endif 318 319 int getaddrinfo(const char *, const char *, 320 const struct addrinfo *, struct addrinfo **); 321 void freeaddrinfo(struct addrinfo *); 322 int getnameinfo(const struct sockaddr *, socklen_t, 323 char *, size_t, char *, size_t, int); 324 const char *gai_strerror(int); 325 326 #if __BSD_VISIBLE 327 int getrrsetbyname(const char *, unsigned int, unsigned int, unsigned int, struct rrsetinfo **); 328 void freerrset(struct rrsetinfo *); 329 #endif 330 __END_DECLS 331 332 #endif /* !_NETDB_H_ */ 333