1/* $OpenBSD: netdb.h,v 1.33 2015/01/18 20:29:31 deraadt 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 <netinet/in.h> 91 92#ifndef _SOCKLEN_T_DEFINED_ 93#define _SOCKLEN_T_DEFINED_ 94typedef __socklen_t socklen_t; /* length type for network syscalls */ 95#endif 96 97#define _PATH_HEQUIV "/etc/hosts.equiv" 98#define _PATH_HOSTS "/etc/hosts" 99#define _PATH_NETWORKS "/etc/networks" 100#define _PATH_PROTOCOLS "/etc/protocols" 101#define _PATH_SERVICES "/etc/services" 102 103/* 104 * Structures returned by network data base library. All addresses are 105 * supplied in host order, and returned in network order (suitable for 106 * use in system calls). 107 */ 108struct hostent { 109 char *h_name; /* official name of host */ 110 char **h_aliases; /* alias list */ 111 int h_addrtype; /* host address type */ 112 int h_length; /* length of address */ 113 char **h_addr_list; /* list of addresses from name server */ 114#define h_addr h_addr_list[0] /* address, for backward compatibility */ 115}; 116 117/* 118 * Assumption here is that a network number 119 * fits in an in_addr_t -- probably a poor one. 120 */ 121struct netent { 122 char *n_name; /* official name of net */ 123 char **n_aliases; /* alias list */ 124 int n_addrtype; /* net address type */ 125 in_addr_t n_net; /* network # */ 126}; 127 128struct servent { 129 char *s_name; /* official service name */ 130 char **s_aliases; /* alias list */ 131 int s_port; /* port # */ 132 char *s_proto; /* protocol to use */ 133}; 134 135struct protoent { 136 char *p_name; /* official protocol name */ 137 char **p_aliases; /* alias list */ 138 int p_proto; /* protocol # */ 139}; 140 141#if __BSD_VISIBLE || __POSIX_VISIBLE < 200809 142extern int h_errno; 143 144/* 145 * Error return codes from gethostbyname() and gethostbyaddr() 146 * (left in extern int h_errno). 147 */ 148 149#define NETDB_INTERNAL -1 /* see errno */ 150#define NETDB_SUCCESS 0 /* no problem */ 151#define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */ 152#define TRY_AGAIN 2 /* Non-Authoritative Host not found, or SERVERFAIL */ 153#define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ 154#define NO_DATA 4 /* Valid name, no data record of requested type */ 155#define NO_ADDRESS NO_DATA /* no address */ 156#endif /* __BSD_VISIBLE || __POSIX_VISIBLE < 200809 */ 157 158/* Values for getaddrinfo() and getnameinfo() */ 159#define AI_PASSIVE 1 /* socket address is intended for bind() */ 160#define AI_CANONNAME 2 /* request for canonical name */ 161#define AI_NUMERICHOST 4 /* don't ever try hostname lookup */ 162#define AI_EXT 8 /* enable non-portable extensions */ 163#define AI_NUMERICSERV 16 /* don't ever try servname lookup */ 164#define AI_FQDN 32 /* return the FQDN that was resolved */ 165#define AI_ADDRCONFIG 64 /* return configured address families only */ 166/* valid flags for addrinfo */ 167#define AI_MASK \ 168 (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_NUMERICSERV | AI_FQDN | \ 169 AI_ADDRCONFIG) 170 171#define NI_NUMERICHOST 1 /* return the host address, not the name */ 172#define NI_NUMERICSERV 2 /* return the service address, not the name */ 173#define NI_NOFQDN 4 /* return a short name if in the local domain */ 174#define NI_NAMEREQD 8 /* fail if either host or service name is unknown */ 175#define NI_DGRAM 16 /* look up datagram service instead of stream */ 176/* #define NI_NUMERICSCOPE 32 return the scope number, not the name */ 177 178#if __BSD_VISIBLE 179#define NI_MAXHOST 256 /* max host name from getnameinfo (MAXHOSTNAMELEN) */ 180#define NI_MAXSERV 32 /* max serv. name length returned by getnameinfo */ 181 182/* 183 * Scope delimit character (KAME hack) 184 */ 185#define SCOPE_DELIMITER '%' 186#endif 187 188#define EAI_BADFLAGS -1 /* invalid value for ai_flags */ 189#define EAI_NONAME -2 /* name or service is not known */ 190#define EAI_AGAIN -3 /* temporary failure in name resolution */ 191#define EAI_FAIL -4 /* non-recoverable failure in name resolution */ 192#define EAI_NODATA -5 /* no address associated with name */ 193#define EAI_FAMILY -6 /* ai_family not supported */ 194#define EAI_SOCKTYPE -7 /* ai_socktype not supported */ 195#define EAI_SERVICE -8 /* service not supported for ai_socktype */ 196#define EAI_ADDRFAMILY -9 /* address family for name not supported */ 197#define EAI_MEMORY -10 /* memory allocation failure */ 198#define EAI_SYSTEM -11 /* system error (code indicated in errno) */ 199#define EAI_BADHINTS -12 /* invalid value for hints */ 200#define EAI_PROTOCOL -13 /* resolved protocol is unknown */ 201#define EAI_OVERFLOW -14 /* argument buffer overflow */ 202 203struct addrinfo { 204 int ai_flags; /* input flags */ 205 int ai_family; /* protocol family for socket */ 206 int ai_socktype; /* socket type */ 207 int ai_protocol; /* protocol for socket */ 208 socklen_t ai_addrlen; /* length of socket-address */ 209 struct sockaddr *ai_addr; /* socket-address for socket */ 210 char *ai_canonname; /* canonical name for service location (iff req) */ 211 struct addrinfo *ai_next; /* pointer to next in list */ 212}; 213 214#if __BSD_VISIBLE 215/* 216 * Flags for getrrsetbyname() 217 */ 218#define RRSET_VALIDATED 1 219 220/* 221 * Return codes for getrrsetbyname() 222 */ 223#define ERRSET_SUCCESS 0 224#define ERRSET_NOMEMORY 1 225#define ERRSET_FAIL 2 226#define ERRSET_INVAL 3 227#define ERRSET_NONAME 4 228#define ERRSET_NODATA 5 229 230/* 231 * Structures used by getrrsetbyname() and freerrset() 232 */ 233struct rdatainfo { 234 unsigned int rdi_length; /* length of data */ 235 unsigned char *rdi_data; /* record data */ 236}; 237 238struct rrsetinfo { 239 unsigned int rri_flags; /* RRSET_VALIDATED ... */ 240 unsigned int rri_rdclass; /* class number */ 241 unsigned int rri_rdtype; /* RR type number */ 242 unsigned int rri_ttl; /* time to live */ 243 unsigned int rri_nrdatas; /* size of rdatas array */ 244 unsigned int rri_nsigs; /* size of sigs array */ 245 char *rri_name; /* canonical name */ 246 struct rdatainfo *rri_rdatas; /* individual records */ 247 struct rdatainfo *rri_sigs; /* individual signatures */ 248}; 249 250struct servent_data { 251 void *fp; 252 char **aliases; 253 int maxaliases; 254 int stayopen; 255 char *line; 256}; 257 258struct protoent_data { 259 void *fp; 260 char **aliases; 261 int maxaliases; 262 int stayopen; 263 char *line; 264}; 265#endif 266 267__BEGIN_DECLS 268void endhostent(void); 269void endnetent(void); 270void endprotoent(void); 271void endservent(void); 272#if __BSD_VISIBLE || __POSIX_VISIBLE < 200809 273struct hostent *gethostbyaddr(const void *, socklen_t, int); 274struct hostent *gethostbyname(const char *); 275#endif 276#if __BSD_VISIBLE 277struct hostent *gethostbyname2(const char *, int); 278#endif 279struct hostent *gethostent(void); 280struct netent *getnetbyaddr(in_addr_t, int); 281struct netent *getnetbyname(const char *); 282struct netent *getnetent(void); 283struct protoent *getprotobyname(const char *); 284struct protoent *getprotobynumber(int); 285struct protoent *getprotoent(void); 286struct servent *getservbyname(const char *, const char *); 287struct servent *getservbyport(int, const char *); 288struct servent *getservent(void); 289#if __BSD_VISIBLE 290void herror(const char *); 291const char *hstrerror(int); 292#endif 293void sethostent(int); 294/* void sethostfile(const char *); */ 295void setnetent(int); 296void setprotoent(int); 297void setservent(int); 298 299#if __BSD_VISIBLE 300void endprotoent_r(struct protoent_data *); 301void endservent_r(struct servent_data *); 302int getprotobyname_r(const char *, struct protoent *, 303 struct protoent_data *); 304int getprotobynumber_r(int, struct protoent *, 305 struct protoent_data *); 306int getservbyname_r(const char *, const char *, struct servent *, 307 struct servent_data *); 308int getservbyport_r(int, const char *, struct servent *, 309 struct servent_data *); 310int getservent_r(struct servent *, struct servent_data *); 311int getprotoent_r(struct protoent *, struct protoent_data *); 312void setprotoent_r(int, struct protoent_data *); 313void setservent_r(int, struct servent_data *); 314#endif 315 316int getaddrinfo(const char *, const char *, 317 const struct addrinfo *, struct addrinfo **); 318void freeaddrinfo(struct addrinfo *); 319int getnameinfo(const struct sockaddr *, socklen_t, 320 char *, size_t, char *, size_t, int); 321const char *gai_strerror(int); 322 323#if __BSD_VISIBLE 324int getrrsetbyname(const char *, unsigned int, unsigned int, unsigned int, struct rrsetinfo **); 325void freerrset(struct rrsetinfo *); 326#endif 327__END_DECLS 328 329#endif /* !_NETDB_H_ */ 330