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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * - 30 * Portions Copyright (c) 1993 by Digital Equipment Corporation. 31 * 32 * Permission to use, copy, modify, and distribute this software for any 33 * purpose with or without fee is hereby granted, provided that the above 34 * copyright notice and this permission notice appear in all copies, and that 35 * the name of Digital Equipment Corporation not be used in advertising or 36 * publicity pertaining to distribution of the document or software without 37 * specific, written prior permission. 38 * 39 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL 40 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES 41 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT 42 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 43 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 44 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 45 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 46 * SOFTWARE. 47 * - 48 * --Copyright-- 49 */ 50 51 /* 52 * @(#)netdb.h 8.1 (Berkeley) 6/2/93 53 * From: Id: netdb.h,v 8.9 1996/11/19 08:39:29 vixie Exp $ 54 * $FreeBSD$ 55 */ 56 57 #ifndef _NETDB_H_ 58 #define _NETDB_H_ 59 60 #include <sys/cdefs.h> 61 62 #ifndef _IN_ADDR_T_DECLARED 63 typedef __uint32_t in_addr_t; 64 #define _IN_ADDR_T_DECLARED 65 #endif 66 67 #ifndef _IN_PORT_T_DECLARED 68 typedef __uint16_t in_port_t; 69 #define _IN_PORT_T_DECLARED 70 #endif 71 72 #ifndef _SIZE_T_DECLARED 73 typedef __size_t size_t; 74 #define _SIZE_T_DECLARED 75 #endif 76 77 #ifndef _SOCKLEN_T_DECLARED 78 typedef __socklen_t socklen_t; 79 #define _SOCKLEN_T_DECLARED 80 #endif 81 82 #ifndef _UINT32_T_DECLARED 83 typedef __uint32_t uint32_t; 84 #define _UINT32_T_DECLARED 85 #endif 86 87 #ifndef _PATH_HEQUIV 88 # define _PATH_HEQUIV "/etc/hosts.equiv" 89 #endif 90 #define _PATH_HOSTS "/etc/hosts" 91 #define _PATH_NETWORKS "/etc/networks" 92 #define _PATH_PROTOCOLS "/etc/protocols" 93 #define _PATH_SERVICES "/etc/services" 94 #define _PATH_SERVICES_DB "/var/db/services.db" 95 96 #define h_errno (*__h_errno()) 97 98 /* 99 * Structures returned by network data base library. All addresses are 100 * supplied in host order, and returned in network order (suitable for 101 * use in system calls). 102 */ 103 struct hostent { 104 char *h_name; /* official name of host */ 105 char **h_aliases; /* alias list */ 106 int h_addrtype; /* host address type */ 107 int h_length; /* length of address */ 108 char **h_addr_list; /* list of addresses from name server */ 109 #define h_addr h_addr_list[0] /* address, for backward compatibility */ 110 }; 111 112 struct netent { 113 char *n_name; /* official name of net */ 114 char **n_aliases; /* alias list */ 115 int n_addrtype; /* net address type */ 116 uint32_t n_net; /* network # */ 117 }; 118 119 struct servent { 120 char *s_name; /* official service name */ 121 char **s_aliases; /* alias list */ 122 int s_port; /* port # */ 123 char *s_proto; /* protocol to use */ 124 }; 125 126 struct protoent { 127 char *p_name; /* official protocol name */ 128 char **p_aliases; /* alias list */ 129 int p_proto; /* protocol # */ 130 }; 131 132 struct addrinfo { 133 int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */ 134 int ai_family; /* AF_xxx */ 135 int ai_socktype; /* SOCK_xxx */ 136 int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */ 137 socklen_t ai_addrlen; /* length of ai_addr */ 138 char *ai_canonname; /* canonical name for hostname */ 139 struct sockaddr *ai_addr; /* binary address */ 140 struct addrinfo *ai_next; /* next structure in linked list */ 141 }; 142 143 #define IPPORT_RESERVED 1024 144 145 /* 146 * Error return codes from gethostbyname() and gethostbyaddr() 147 * (left in 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 #if 0 162 /* obsoleted */ 163 #define EAI_ADDRFAMILY 1 /* address family for hostname not supported */ 164 #endif 165 #define EAI_AGAIN 2 /* temporary failure in name resolution */ 166 #define EAI_BADFLAGS 3 /* invalid value for ai_flags */ 167 #define EAI_FAIL 4 /* non-recoverable failure in name resolution */ 168 #define EAI_FAMILY 5 /* ai_family not supported */ 169 #define EAI_MEMORY 6 /* memory allocation failure */ 170 #if 0 171 /* obsoleted */ 172 #define EAI_NODATA 7 /* no address associated with hostname */ 173 #endif 174 #define EAI_NONAME 8 /* hostname nor servname provided, or not known */ 175 #define EAI_SERVICE 9 /* servname not supported for ai_socktype */ 176 #define EAI_SOCKTYPE 10 /* ai_socktype not supported */ 177 #define EAI_SYSTEM 11 /* system error returned in errno */ 178 #define EAI_BADHINTS 12 /* invalid value for hints */ 179 #define EAI_PROTOCOL 13 /* resolved protocol is unknown */ 180 #define EAI_OVERFLOW 14 /* argument buffer overflow */ 181 #define EAI_MAX 15 182 183 /* 184 * Flag values for getaddrinfo() 185 */ 186 #define AI_PASSIVE 0x00000001 /* get address to use bind() */ 187 #define AI_CANONNAME 0x00000002 /* fill ai_canonname */ 188 #define AI_NUMERICHOST 0x00000004 /* prevent host name resolution */ 189 #define AI_NUMERICSERV 0x00000008 /* prevent service name resolution */ 190 /* valid flags for addrinfo (not a standard def, apps should not use it) */ 191 #define AI_MASK \ 192 (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_NUMERICSERV | \ 193 AI_ADDRCONFIG | AI_ALL | AI_V4MAPPED) 194 195 #define AI_ALL 0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */ 196 #define AI_V4MAPPED_CFG 0x00000200 /* accept IPv4-mapped if kernel supports */ 197 #define AI_ADDRCONFIG 0x00000400 /* only if any address is assigned */ 198 #define AI_V4MAPPED 0x00000800 /* accept IPv4-mapped IPv6 address */ 199 /* special recommended flags for getipnodebyname */ 200 #define AI_DEFAULT (AI_V4MAPPED_CFG | AI_ADDRCONFIG) 201 202 /* 203 * Constants for getnameinfo() 204 */ 205 #define NI_MAXHOST 1025 206 #define NI_MAXSERV 32 207 208 /* 209 * Flag values for getnameinfo() 210 */ 211 #define NI_NOFQDN 0x00000001 212 #define NI_NUMERICHOST 0x00000002 213 #define NI_NAMEREQD 0x00000004 214 #define NI_NUMERICSERV 0x00000008 215 #define NI_DGRAM 0x00000010 216 #if 0 /* obsolete */ 217 #define NI_WITHSCOPEID 0x00000020 218 #endif 219 220 /* 221 * Scope delimit character 222 */ 223 #define SCOPE_DELIMITER '%' 224 225 int getaddrinfo(const char *, const char *, 226 const struct addrinfo *, struct addrinfo **); 227 void freeaddrinfo(struct addrinfo *); 228 const char *gai_strerror(int ecode); 229 230 struct servent *getservbyport(int port, const char *proto); 231 232 struct protoent *getprotoent(void); 233 struct protoent *getprotobyname(const char *name); 234 struct protoent *getprotobynumber(int proto); 235 void setprotoent(int stayopen); 236 void endprotoent(void); 237 238 int getnameinfo(const struct sockaddr *sa, socklen_t salen, 239 char *host, size_t hostlen, char *serv, size_t servlen, int flags); 240 241 struct netent *getnetbyaddr(uint32_t net, int type); 242 243 #endif /* !_NETDB_H_ */ 244