2 * Copyright (c) 1994, Garrett Wollman
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * $FreeBSD: src/lib/libc/net/gethostnamadr.c,v 1.15.2.2 2001/03/05 10:40:42 obrien Exp $
26 * $DragonFly: src/lib/libc/net/gethostnamadr.c,v 1.5 2005/11/13 02:04:47 swildner Exp $
29 #include <sys/param.h>
30 #include <sys/socket.h>
31 #include <netinet/in.h>
32 #include <arpa/inet.h>
37 #include <arpa/nameser.h> /* XXX hack for _res */
38 #include <resolv.h> /* XXX hack for _res */
40 #define _PATH_HOSTCONF "/etc/host.conf"
47 #define SERVICE_MAX SERVICE_NIS
51 enum service_type type;
53 { "hosts", SERVICE_HOSTS },
54 { "/etc/hosts", SERVICE_HOSTS },
55 { "hosttable", SERVICE_HOSTS },
56 { "htable", SERVICE_HOSTS },
57 { "bind", SERVICE_BIND },
58 { "dns", SERVICE_BIND },
59 { "domain", SERVICE_BIND },
60 { "yp", SERVICE_NIS },
61 { "yellowpages", SERVICE_NIS },
62 { "nis", SERVICE_NIS },
66 static enum service_type service_order[SERVICE_MAX + 1];
67 static int service_done = 0;
69 static enum service_type
70 get_service_name(const char *name) {
72 for(i = 0; service_names[i].type != SERVICE_NONE; i++) {
73 if(!strcasecmp(name, service_names[i].name)) {
74 return service_names[i].type;
83 char *cp, *p, buf[BUFSIZ];
87 if ((fd = (FILE *)fopen(_PATH_HOSTCONF, "r")) == NULL) {
88 /* make some assumptions */
89 service_order[0] = SERVICE_BIND;
90 service_order[1] = SERVICE_HOSTS;
91 service_order[2] = SERVICE_NONE;
93 while (fgets(buf, BUFSIZ, fd) != NULL && cc < SERVICE_MAX) {
98 while ((cp = strsep(&p, "\n \t,:;")) != NULL && *cp == '\0')
103 if (isalpha((unsigned char)cp[0])) {
104 service_order[cc] = get_service_name(cp);
105 if(service_order[cc] != SERVICE_NONE)
108 while ((cp = strsep(&p, "\n \t,:;")) != NULL && *cp == '\0')
110 } while(cp != NULL && cc < SERVICE_MAX);
112 service_order[cc] = SERVICE_NONE;
119 gethostbyname(const char *name)
123 if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
124 h_errno = NETDB_INTERNAL;
127 if (_res.options & RES_USE_INET6) { /* XXX */
128 hp = gethostbyname2(name, AF_INET6); /* XXX */
130 return (hp); /* XXX */
132 return (gethostbyname2(name, AF_INET));
136 gethostbyname2(const char *name, int type)
138 struct hostent *hp = 0;
145 switch (service_order[nserv]) {
149 hp = _gethostbyhtname(name, type);
152 hp = _gethostbydnsname(name, type);
155 hp = _gethostbynisname(name, type);
164 gethostbyaddr(const char *addr, int len, int type)
166 struct hostent *hp = 0;
173 switch (service_order[nserv]) {
177 hp = _gethostbyhtaddr(addr, len, type);
180 hp = _gethostbydnsaddr(addr, len, type);
183 hp = _gethostbynisaddr(addr, len, type);
194 * Temporary function (not thread safe)
197 gethostbyaddr_r(const char *addr, int len, int type,
198 struct hostent *result, struct hostent_data *buffer __unused)
202 if ((hp = gethostbyaddr(addr, len, type)) == NULL) {
205 memcpy(result, hp, sizeof(struct hostent));
212 sethostent(int stayopen)
214 _sethosthtent(stayopen);
215 _sethostdnsent(stayopen);