netdb.h revision 121439
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: head/include/netdb.h 121439 2003-10-23 17:54:17Z ume $ 59 */ 60 61#ifndef _NETDB_H_ 62#define _NETDB_H_ 63 64#include <sys/cdefs.h> 65#include <sys/_types.h> 66 67#ifndef _SIZE_T_DECLARED 68typedef __size_t size_t; 69#define _SIZE_T_DECLARED 70#endif 71 72#ifndef _SOCKLEN_T_DECLARED 73typedef __socklen_t socklen_t; 74#define _SOCKLEN_T_DECLARED 75#endif 76 77#ifndef _PATH_HEQUIV 78# define _PATH_HEQUIV "/etc/hosts.equiv" 79#endif 80#define _PATH_HOSTS "/etc/hosts" 81#define _PATH_NETWORKS "/etc/networks" 82#define _PATH_PROTOCOLS "/etc/protocols" 83#define _PATH_SERVICES "/etc/services" 84 85extern int h_errno; 86 87/* 88 * Structures returned by network data base library. All addresses are 89 * supplied in host order, and returned in network order (suitable for 90 * use in system calls). 91 */ 92struct hostent { 93 char *h_name; /* official name of host */ 94 char **h_aliases; /* alias list */ 95 int h_addrtype; /* host address type */ 96 int h_length; /* length of address */ 97 char **h_addr_list; /* list of addresses from name server */ 98#define h_addr h_addr_list[0] /* address, for backward compatibility */ 99}; 100 101/* 102 * Assumption here is that a network number 103 * fits in an unsigned long -- probably a poor one. 104 */ 105struct netent { 106 char *n_name; /* official name of net */ 107 char **n_aliases; /* alias list */ 108 int n_addrtype; /* net address type */ 109 unsigned long n_net; /* network # */ 110}; 111 112struct servent { 113 char *s_name; /* official service name */ 114 char **s_aliases; /* alias list */ 115 int s_port; /* port # */ 116 char *s_proto; /* protocol to use */ 117}; 118 119struct protoent { 120 char *p_name; /* official protocol name */ 121 char **p_aliases; /* alias list */ 122 int p_proto; /* protocol # */ 123}; 124 125struct addrinfo { 126 int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */ 127 int ai_family; /* PF_xxx */ 128 int ai_socktype; /* SOCK_xxx */ 129 int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */ 130 size_t ai_addrlen; /* length of ai_addr */ 131 char *ai_canonname; /* canonical name for hostname */ 132 struct sockaddr *ai_addr; /* binary address */ 133 struct addrinfo *ai_next; /* next structure in linked list */ 134}; 135 136/* 137 * Error return codes from gethostbyname() and gethostbyaddr() 138 * (left in extern int h_errno). 139 */ 140 141#define NETDB_INTERNAL -1 /* see errno */ 142#define NETDB_SUCCESS 0 /* no problem */ 143#define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found */ 144#define TRY_AGAIN 2 /* Non-Authoritative Host not found, or SERVERFAIL */ 145#define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */ 146#define NO_DATA 4 /* Valid name, no data record of requested type */ 147#define NO_ADDRESS NO_DATA /* no address, look for MX record */ 148 149/* 150 * Error return codes from getaddrinfo() 151 */ 152#if 0 153/* obsoleted */ 154#define EAI_ADDRFAMILY 1 /* address family for hostname not supported */ 155#endif 156#define EAI_AGAIN 2 /* temporary failure in name resolution */ 157#define EAI_BADFLAGS 3 /* invalid value for ai_flags */ 158#define EAI_FAIL 4 /* non-recoverable failure in name resolution */ 159#define EAI_FAMILY 5 /* ai_family not supported */ 160#define EAI_MEMORY 6 /* memory allocation failure */ 161#if 0 162/* obsoleted */ 163#define EAI_NODATA 7 /* no address associated with hostname */ 164#endif 165#define EAI_NONAME 8 /* hostname nor servname provided, or not known */ 166#define EAI_NODATA EAINONAME /* To be removed on 23 APR 2004 */ 167#define EAI_SERVICE 9 /* servname not supported for ai_socktype */ 168#define EAI_SOCKTYPE 10 /* ai_socktype not supported */ 169#define EAI_SYSTEM 11 /* system error returned in errno */ 170#define EAI_BADHINTS 12 171#define EAI_PROTOCOL 13 172#define EAI_MAX 14 173 174/* 175 * Flag values for getaddrinfo() 176 */ 177#define AI_PASSIVE 0x00000001 /* get address to use bind() */ 178#define AI_CANONNAME 0x00000002 /* fill ai_canonname */ 179#define AI_NUMERICHOST 0x00000004 /* prevent name resolution */ 180/* valid flags for addrinfo */ 181#define AI_MASK \ 182 (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_ADDRCONFIG) 183 184#define AI_ALL 0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */ 185#define AI_V4MAPPED_CFG 0x00000200 /* accept IPv4-mapped if kernel supports */ 186#define AI_ADDRCONFIG 0x00000400 /* only if any address is assigned */ 187#define AI_V4MAPPED 0x00000800 /* accept IPv4-mapped IPv6 address */ 188/* special recommended flags for getipnodebyname */ 189#define AI_DEFAULT (AI_V4MAPPED_CFG | AI_ADDRCONFIG) 190 191/* 192 * Constants for getnameinfo() 193 */ 194#define NI_MAXHOST 1025 195#define NI_MAXSERV 32 196 197/* 198 * Flag values for getnameinfo() 199 */ 200#define NI_NOFQDN 0x00000001 201#define NI_NUMERICHOST 0x00000002 202#define NI_NAMEREQD 0x00000004 203#define NI_NUMERICSERV 0x00000008 204#define NI_DGRAM 0x00000010 205#if 1 /* obsolete */ 206#define NI_WITHSCOPEID 0x00000020 207#endif 208 209/* 210 * Scope delimit character 211 */ 212#define SCOPE_DELIMITER '%' 213 214__BEGIN_DECLS 215void endhostent(void); 216void endnetent(void); 217void endnetgrent(void); 218void endprotoent(void); 219void endservent(void); 220void freehostent(struct hostent *); 221struct hostent *gethostbyaddr(const char *, int, int); 222struct hostent *gethostbyname(const char *); 223struct hostent *gethostbyname2(const char *, int); 224struct hostent *gethostent(void); 225struct hostent *getipnodebyaddr(const void *, size_t, int, int *); 226struct hostent *getipnodebyname(const char *, int, int, int *); 227struct netent *getnetbyaddr(unsigned long, int); 228struct netent *getnetbyname(const char *); 229struct netent *getnetent(void); 230int getnetgrent(char **, char **, char **); 231struct protoent *getprotobyname(const char *); 232struct protoent *getprotobynumber(int); 233struct protoent *getprotoent(void); 234struct servent *getservbyname(const char *, const char *); 235struct servent *getservbyport(int, const char *); 236struct servent *getservent(void); 237void herror(const char *); 238__const char *hstrerror(int); 239int innetgr(const char *, const char *, const char *, const char *); 240void sethostent(int); 241/* void sethostfile(const char *); */ 242void setnetent(int); 243void setprotoent(int); 244int getaddrinfo(const char *, const char *, 245 const struct addrinfo *, struct addrinfo **); 246int getnameinfo(const struct sockaddr *, socklen_t, char *, 247 size_t, char *, size_t, int); 248void freeaddrinfo(struct addrinfo *); 249char *gai_strerror(int); 250void setnetgrent(const char *); 251void setservent(int); 252 253/* 254 * PRIVATE functions specific to the FreeBSD implementation 255 */ 256 257/* DO NOT USE THESE, THEY ARE SUBJECT TO CHANGE AND ARE NOT PORTABLE!!! */ 258void _sethosthtent(int); 259void _endhosthtent(void); 260void _sethostdnsent(int); 261void _endhostdnsent(void); 262void _setnethtent(int); 263void _endnethtent(void); 264void _setnetdnsent(int); 265void _endnetdnsent(void); 266struct hostent * _gethostbynisname(const char *, int); 267struct hostent * _gethostbynisaddr(const char *, int, int); 268void _map_v4v6_address(const char *, char *); 269void _map_v4v6_hostent(struct hostent *, char **, char **); 270__END_DECLS 271 272#endif /* !_NETDB_H_ */ 273