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 * $FreeBSD$ 59 */ 60 61 #ifndef _NETDB_H_ 62 #define _NETDB_H_ 63 64 #include <sys/cdefs.h> 65 #include <sys/_types.h> 66 #include <machine/_limits.h> 67 #include <machine/endian.h> 68 69 #ifndef _SIZE_T_DECLARED 70 typedef __size_t size_t; 71 #define _SIZE_T_DECLARED 72 #endif 73 74 #ifndef _SOCKLEN_T_DECLARED 75 typedef __socklen_t socklen_t; 76 #define _SOCKLEN_T_DECLARED 77 #endif 78 79 #ifndef _UINT32_T_DECLARED 80 typedef __uint32_t uint32_t; 81 #define _UINT32_T_DECLARED 82 #endif 83 84 #ifndef _PATH_HEQUIV 85 # define _PATH_HEQUIV "/etc/hosts.equiv" 86 #endif 87 #define _PATH_HOSTS "/etc/hosts" 88 #define _PATH_NETWORKS "/etc/networks" 89 #define _PATH_PROTOCOLS "/etc/protocols" 90 #define _PATH_SERVICES "/etc/services" 91 92 #define h_errno (*__h_error()) 93 94 /* 95 * Structures returned by network data base library. All addresses are 96 * supplied in host order, and returned in network order (suitable for 97 * use in system calls). 98 */ 99 struct hostent { 100 char *h_name; /* official name of host */ 101 char **h_aliases; /* alias list */ 102 int h_addrtype; /* host address type */ 103 int h_length; /* length of address */ 104 char **h_addr_list; /* list of addresses from name server */ 105 #define h_addr h_addr_list[0] /* address, for backward compatibility */ 106 }; 107 108 struct netent { 109 char *n_name; /* official name of net */ 110 char **n_aliases; /* alias list */ 111 int n_addrtype; /* net address type */ 112 uint32_t n_net; /* network # */ 113 }; 114 115 struct servent { 116 char *s_name; /* official service name */ 117 char **s_aliases; /* alias list */ 118 int s_port; /* port # */ 119 char *s_proto; /* protocol to use */ 120 }; 121 122 struct protoent { 123 char *p_name; /* official protocol name */ 124 char **p_aliases; /* alias list */ 125 int p_proto; /* protocol # */ 126 }; 127 128 /* 129 * Note: ai_addrlen used to be a size_t, per RFC 2553. 130 * In XNS5.2, and subsequently in POSIX-2001 and RFC 3493 it was 131 * changed to a socklen_t. 132 * To accomodate for this while preserving binary compatibility with the 133 * old interface, we prepend or append 32 bits of padding, depending on 134 * the (LP64) architecture's endianness. 135 * 136 * This should be deleted the next time the libc major number is 137 * incremented. 138 */ 139 struct addrinfo { 140 int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */ 141 int ai_family; /* PF_xxx */ 142 int ai_socktype; /* SOCK_xxx */ 143 int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */ 144 #if __LONG_BIT == 64 && _BYTE_ORDER == _BIG_ENDIAN 145 uint32_t __ai_pad0; /* ABI compatibility */ 146 #endif 147 socklen_t ai_addrlen; /* length of ai_addr */ 148 #if __LONG_BIT == 64 && _BYTE_ORDER == _LITTLE_ENDIAN 149 uint32_t __ai_pad0; /* ABI compatibility */ 150 #endif 151 char *ai_canonname; /* canonical name for hostname */ 152 struct sockaddr *ai_addr; /* binary address */ 153 struct addrinfo *ai_next; /* next structure in linked list */ 154 }; 155 156 /* 157 * Error return codes from gethostbyname() and gethostbyaddr() 158 * (left in h_errno). 159 */ 160 161 #define NETDB_INTERNAL -1 /* see errno */ 162 #define NETDB_SUCCESS 0 /* no problem */ 163 #define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */ 164 #define TRY_AGAIN 2 /* Non-Authoritative Host not found, or SERVERFAIL */ 165 #define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ 166 #define NO_DATA 4 /* Valid name, no data record of requested type */ 167 #define NO_ADDRESS NO_DATA /* no address, look for MX record */ 168 169 /* 170 * Error return codes from getaddrinfo() 171 */ 172 #if 0 173 /* obsoleted */ 174 #define EAI_ADDRFAMILY 1 /* address family for hostname not supported */ 175 #endif 176 #define EAI_AGAIN 2 /* temporary failure in name resolution */ 177 #define EAI_BADFLAGS 3 /* invalid value for ai_flags */ 178 #define EAI_FAIL 4 /* non-recoverable failure in name resolution */ 179 #define EAI_FAMILY 5 /* ai_family not supported */ 180 #define EAI_MEMORY 6 /* memory allocation failure */ 181 #if 0 182 /* obsoleted */ 183 #define EAI_NODATA 7 /* no address associated with hostname */ 184 #endif 185 #define EAI_NONAME 8 /* hostname nor servname provided, or not known */ 186 #define EAI_SERVICE 9 /* servname not supported for ai_socktype */ 187 #define EAI_SOCKTYPE 10 /* ai_socktype not supported */ 188 #define EAI_SYSTEM 11 /* system error returned in errno */ 189 #define EAI_BADHINTS 12 190 #define EAI_PROTOCOL 13 191 #define EAI_MAX 14 192 193 /* 194 * Flag values for getaddrinfo() 195 */ 196 #define AI_PASSIVE 0x00000001 /* get address to use bind() */ 197 #define AI_CANONNAME 0x00000002 /* fill ai_canonname */ 198 #define AI_NUMERICHOST 0x00000004 /* prevent host name resolution */ 199 #define AI_NUMERICSERV 0x00000008 /* prevent service name resolution */ 200 /* valid flags for addrinfo (not a standard def, apps should not use it) */ 201 #define AI_MASK \ 202 (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_NUMERICSERV | \ 203 AI_ADDRCONFIG) 204 205 #define AI_ALL 0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */ 206 #define AI_V4MAPPED_CFG 0x00000200 /* accept IPv4-mapped if kernel supports */ 207 #define AI_ADDRCONFIG 0x00000400 /* only if any address is assigned */ 208 #define AI_V4MAPPED 0x00000800 /* accept IPv4-mapped IPv6 address */ 209 /* special recommended flags for getipnodebyname */ 210 #define AI_DEFAULT (AI_V4MAPPED_CFG | AI_ADDRCONFIG) 211 212 /* 213 * Constants for getnameinfo() 214 */ 215 #define NI_MAXHOST 1025 216 #define NI_MAXSERV 32 217 218 /* 219 * Flag values for getnameinfo() 220 */ 221 #define NI_NOFQDN 0x00000001 222 #define NI_NUMERICHOST 0x00000002 223 #define NI_NAMEREQD 0x00000004 224 #define NI_NUMERICSERV 0x00000008 225 #define NI_DGRAM 0x00000010 226 #if 0 /* obsolete */ 227 #define NI_WITHSCOPEID 0x00000020 228 #endif 229 230 /* 231 * Scope delimit character 232 */ 233 #define SCOPE_DELIMITER '%' 234 235 __BEGIN_DECLS 236 void endhostent(void); 237 void endnetent(void); 238 void endnetgrent(void); 239 void endprotoent(void); 240 void endservent(void); 241 void freehostent(struct hostent *); 242 struct hostent *gethostbyaddr(const char *, int, int); 243 struct hostent *gethostbyname(const char *); 244 struct hostent *gethostbyname2(const char *, int); 245 struct hostent *gethostent(void); 246 struct hostent *getipnodebyaddr(const void *, size_t, int, int *); 247 struct hostent *getipnodebyname(const char *, int, int, int *); 248 struct netent *getnetbyaddr(uint32_t, int); 249 struct netent *getnetbyname(const char *); 250 struct netent *getnetent(void); 251 int getnetgrent(char **, char **, char **); 252 struct protoent *getprotobyname(const char *); 253 struct protoent *getprotobynumber(int); 254 struct protoent *getprotoent(void); 255 struct servent *getservbyname(const char *, const char *); 256 struct servent *getservbyport(int, const char *); 257 struct servent *getservent(void); 258 void herror(const char *); 259 __const char *hstrerror(int); 260 int innetgr(const char *, const char *, const char *, const char *); 261 void sethostent(int); 262 /* void sethostfile(const char *); */ 263 void setnetent(int); 264 void setprotoent(int); 265 int getaddrinfo(const char *, const char *, 266 const struct addrinfo *, struct addrinfo **); 267 int getnameinfo(const struct sockaddr *, socklen_t, char *, 268 size_t, char *, size_t, int); 269 void freeaddrinfo(struct addrinfo *); 270 const char *gai_strerror(int); 271 void setnetgrent(const char *); 272 void setservent(int); 273 274 /* 275 * PRIVATE functions specific to the FreeBSD implementation 276 */ 277 278 /* DO NOT USE THESE, THEY ARE SUBJECT TO CHANGE AND ARE NOT PORTABLE!!! */ 279 int * __h_error(void); 280 __END_DECLS 281 282 #endif /* !_NETDB_H_ */ 283