1 /*- 2 * Copyright (c) 1980, 1983, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. 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 * - 34 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 35 * 36 * Permission to use, copy, modify, and distribute this software for any 37 * purpose with or without fee is hereby granted, provided that the above 38 * copyright notice and this permission notice appear in all copies, and that 39 * the name of Digital Equipment Corporation not be used in advertising or 40 * publicity pertaining to distribution of the document or software without 41 * specific, written prior permission. 42 * 43 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 44 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 45 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 46 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 47 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 48 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 49 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 50 * SOFTWARE. 51 * - 52 * --Copyright-- 53 */ 54 55 /* 56 * @(#)netdb.h 8.1 (Berkeley) 6/2/93 57 * From: Id: netdb.h,v 8.9 1996/11/19 08:39:29 vixie Exp $ 58 * $FreeBSD: src/include/netdb.h,v 1.23 2002/03/23 17:24:53 imp Exp $ 59 */ 60 61 #ifndef _NETDB_H_ 62 #define _NETDB_H_ 63 64 #include <sys/cdefs.h> 65 #include <sys/types.h> 66 #include <machine/ansi.h> 67 #include <stdio.h> 68 69 #ifndef __socklen_t_defined 70 typedef unsigned int socklen_t; 71 #define __socklen_t_defined 1 72 #endif 73 74 #ifdef _BSD_SOCKLEN_T_ 75 typedef _BSD_SOCKLEN_T_ socklen_t; 76 #undef _BSD_SOCKLEN_T_ 77 #endif 78 79 #ifndef _PATH_HEQUIV 80 # define _PATH_HEQUIV "/etc/hosts.equiv" 81 #endif 82 #define _PATH_HOSTS "/etc/hosts" 83 #define _PATH_NETWORKS "/etc/networks" 84 #define _PATH_PROTOCOLS "/etc/protocols" 85 #define _PATH_SERVICES "/etc/services" 86 87 extern int h_errno; 88 89 #define MAXALIASES 35 90 /* For now, only support one return address. */ 91 #define MAXADDRS 2 92 /* 93 * Structures returned by network data base library. All addresses are 94 * supplied in host order, and returned in network order (suitable for 95 * use in system calls). 96 */ 97 struct hostent { 98 char *h_name; /* official name of host */ 99 char **h_aliases; /* alias list */ 100 int h_addrtype; /* host address type */ 101 int h_length; /* length of address */ 102 char **h_addr_list; /* list of addresses from name server */ 103 char *h_addr; /* address, for backward compatibility */ 104 /* private data, for re-entrancy */ 105 char *__host_addrs[MAXADDRS]; 106 char *__host_aliases[MAXALIASES]; 107 unsigned int __host_addr[4]; 108 }; 109 110 /* 111 * Assumption here is that a network number 112 * fits in an unsigned long -- probably a poor one. 113 */ 114 struct netent { 115 char *n_name; /* official name of net */ 116 char **n_aliases; /* alias list */ 117 int n_addrtype; /* net address type */ 118 unsigned long n_net; /* network # */ 119 }; 120 121 struct servent { 122 char *s_name; /* official service name */ 123 char **s_aliases; /* alias list */ 124 int s_port; /* port # */ 125 char *s_proto; /* protocol to use */ 126 }; 127 128 struct protoent { 129 char *p_name; /* official protocol name */ 130 char **p_aliases; /* alias list */ 131 int p_proto; /* protocol # */ 132 }; 133 134 struct addrinfo { 135 int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */ 136 int ai_family; /* PF_xxx */ 137 int ai_socktype; /* SOCK_xxx */ 138 int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */ 139 size_t ai_addrlen; /* length of ai_addr */ 140 char *ai_canonname; /* canonical name for hostname */ 141 struct sockaddr *ai_addr; /* binary address */ 142 struct addrinfo *ai_next; /* next structure in linked list */ 143 }; 144 145 /* 146 * Error return codes from gethostbyname() and gethostbyaddr() 147 * (left in extern int h_errno). 148 */ 149 150 #define NETDB_INTERNAL -1 /* see errno */ 151 #define NETDB_SUCCESS 0 /* no problem */ 152 #define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */ 153 #define TRY_AGAIN 2 /* Non-Authoritative Host not found, or SERVERFAIL */ 154 #define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ 155 #define NO_DATA 4 /* Valid name, no data record of requested type */ 156 #define NO_ADDRESS NO_DATA /* no address, look for MX record */ 157 158 /* 159 * Error return codes from getaddrinfo() 160 */ 161 #define EAI_ADDRFAMILY 1 /* address family for hostname not supported */ 162 #define EAI_AGAIN 2 /* temporary failure in name resolution */ 163 #define EAI_BADFLAGS 3 /* invalid value for ai_flags */ 164 #define EAI_FAIL 4 /* non-recoverable failure in name resolution */ 165 #define EAI_FAMILY 5 /* ai_family not supported */ 166 #define EAI_MEMORY 6 /* memory allocation failure */ 167 #define EAI_NODATA 7 /* no address associated with hostname */ 168 #define EAI_NONAME 8 /* hostname nor servname provided, or not known */ 169 #define EAI_SERVICE 9 /* servname not supported for ai_socktype */ 170 #define EAI_SOCKTYPE 10 /* ai_socktype not supported */ 171 #define EAI_SYSTEM 11 /* system error returned in errno */ 172 #define EAI_BADHINTS 12 173 #define EAI_PROTOCOL 13 174 #define EAI_MAX 14 175 176 /* 177 * Flag values for getaddrinfo() 178 */ 179 #define AI_PASSIVE 0x00000001 /* get address to use bind() */ 180 #define AI_CANONNAME 0x00000002 /* fill ai_canonname */ 181 #define AI_NUMERICHOST 0x00000004 /* prevent name resolution */ 182 /* valid flags for addrinfo */ 183 #define AI_MASK \ 184 (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_ADDRCONFIG) 185 186 #define AI_ALL 0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */ 187 #define AI_V4MAPPED_CFG 0x00000200 /* accept IPv4-mapped if kernel supports */ 188 #define AI_ADDRCONFIG 0x00000400 /* only if any address is assigned */ 189 #define AI_V4MAPPED 0x00000800 /* accept IPv4-mapped IPv6 address */ 190 /* special recommended flags for getipnodebyname */ 191 #define AI_DEFAULT (AI_V4MAPPED_CFG | AI_ADDRCONFIG) 192 193 /* 194 * Constants for getnameinfo() 195 */ 196 #define NI_MAXHOST 1025 197 #define NI_MAXSERV 32 198 199 /* 200 * Flag values for getnameinfo() 201 */ 202 #define NI_NOFQDN 0x00000001 203 #define NI_NUMERICHOST 0x00000002 204 #define NI_NAMEREQD 0x00000004 205 #define NI_NUMERICSERV 0x00000008 206 #define NI_DGRAM 0x00000010 207 #define NI_WITHSCOPEID 0x00000020 208 209 /* 210 * Scope delimit character 211 */ 212 #define SCOPE_DELIMITER '%' 213 214 __BEGIN_DECLS 215 void endhostent(void); 216 void endhostent_r(FILE **, int *); 217 void endnetent(void); 218 void endnetgrent(void); 219 void endprotoent(void); 220 void endservent(void); 221 void freehostent(struct hostent *); 222 struct hostent *gethostbyaddr(const char *, int, int); 223 struct hostent *gethostbyname(const char *); 224 struct hostent *gethostbyname2(const char *, int); 225 struct hostent *gethostent(void); 226 int gethostent_r(struct hostent *, char *, int, int *, FILE **); 227 struct hostent *getipnodebyaddr(const void *, size_t, int, int *); 228 struct hostent *getipnodebyname(const char *, int, int, int *); 229 struct netent *getnetbyaddr(unsigned long, int); 230 struct netent *getnetbyname(const char *); 231 struct netent *getnetent(void); 232 int getnetgrent(char **, char **, char **); 233 struct protoent *getprotobyname(const char *); 234 struct protoent *getprotobynumber(int); 235 struct protoent *getprotoent(void); 236 struct servent *getservbyname(const char *, const char *); 237 struct servent *getservbyport(int, const char *); 238 struct servent *getservent(void); 239 void herror(const char *); 240 __const char *hstrerror(int); 241 int innetgr(const char *, const char *, const char *, const char *); 242 void sethostent(int); 243 void sethostent_r(int, FILE **, int *); 244 /* void sethostfile(const char *); */ 245 void setnetent(int); 246 void setprotoent(int); 247 int getaddrinfo(const char *, const char *, 248 const struct addrinfo *, struct addrinfo **); 249 int getnameinfo(const struct sockaddr *, socklen_t, char *, 250 size_t, char *, size_t, int); 251 void freeaddrinfo(struct addrinfo *); 252 char *gai_strerror(int); 253 void setnetgrent(const char *); 254 void setservent(int); 255 256 /* 257 * PRIVATE functions specific to the FreeBSD implementation 258 */ 259 260 /* DO NOT USE THESE, THEY ARE SUBJECT TO CHANGE AND ARE NOT PORTABLE!!! */ 261 void _sethosthtent(int); 262 void _sethosthtent_r(int, FILE **, int *); 263 void _endhosthtent(void); 264 void _endhosthtent_r(FILE **, int *); 265 void _sethostdnsent(int); 266 void _endhostdnsent(void); 267 void _setnethtent(int); 268 void _endnethtent(void); 269 void _setnetdnsent(int); 270 void _endnetdnsent(void); 271 struct hostent * _gethostbynisname(const char *, int); 272 struct hostent * _gethostbynisaddr(const char *, int, int); 273 void _map_v4v6_address(const char *, char *); 274 void _map_v4v6_hostent(struct hostent *, char **, int *); 275 __END_DECLS 276 277 #endif /* !_NETDB_H_ */ 278