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
26 #if defined(LIBC_SCCS) && !defined(lint)
27 static char sccsid[] = "@(#)$FreeBSD: src/lib/libc/net/gethostnamadr.c,v 1.15.2.2 2001/03/05 10:40:42 obrien Exp $";
28 static char rcsid[] = "$FreeBSD: src/lib/libc/net/gethostnamadr.c,v 1.15.2.2 2001/03/05 10:40:42 obrien Exp $";
29 #endif /* LIBC_SCCS and not lint */
31 #include <sys/param.h>
32 #include <sys/socket.h>
33 #include <netinet/in.h>
34 #include <arpa/inet.h>
39 #include <arpa/nameser.h> /* XXX hack for _res */
40 #include <resolv.h> /* XXX hack for _res */
42 #define _PATH_HOSTCONF "/etc/host.conf"
49 #define SERVICE_MAX SERVICE_NIS
53 enum service_type type;
55 { "hosts", SERVICE_HOSTS },
56 { "/etc/hosts", SERVICE_HOSTS },
57 { "hosttable", SERVICE_HOSTS },
58 { "htable", SERVICE_HOSTS },
59 { "bind", SERVICE_BIND },
60 { "dns", SERVICE_BIND },
61 { "domain", SERVICE_BIND },
62 { "yp", SERVICE_NIS },
63 { "yellowpages", SERVICE_NIS },
64 { "nis", SERVICE_NIS },
68 static enum service_type service_order[SERVICE_MAX + 1];
69 static int service_done = 0;
71 static enum service_type
72 get_service_name(const char *name) {
74 for(i = 0; service_names[i].type != SERVICE_NONE; i++) {
75 if(!strcasecmp(name, service_names[i].name)) {
76 return service_names[i].type;
85 char *cp, *p, buf[BUFSIZ];
89 if ((fd = (FILE *)fopen(_PATH_HOSTCONF, "r")) == NULL) {
90 /* make some assumptions */
91 service_order[0] = SERVICE_BIND;
92 service_order[1] = SERVICE_HOSTS;
93 service_order[2] = SERVICE_NONE;
95 while (fgets(buf, BUFSIZ, fd) != NULL && cc < SERVICE_MAX) {
100 while ((cp = strsep(&p, "\n \t,:;")) != NULL && *cp == '\0')
105 if (isalpha((unsigned char)cp[0])) {
106 service_order[cc] = get_service_name(cp);
107 if(service_order[cc] != SERVICE_NONE)
110 while ((cp = strsep(&p, "\n \t,:;")) != NULL && *cp == '\0')
112 } while(cp != NULL && cc < SERVICE_MAX);
114 service_order[cc] = SERVICE_NONE;
121 gethostbyname(const char *name)
125 if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
126 h_errno = NETDB_INTERNAL;
129 if (_res.options & RES_USE_INET6) { /* XXX */
130 hp = gethostbyname2(name, AF_INET6); /* XXX */
132 return (hp); /* XXX */
134 return (gethostbyname2(name, AF_INET));
138 gethostbyname2(const char *name, int type)
140 struct hostent *hp = 0;
147 switch (service_order[nserv]) {
151 hp = _gethostbyhtname(name, type);
154 hp = _gethostbydnsname(name, type);
157 hp = _gethostbynisname(name, type);
166 gethostbyaddr(const char *addr, int len, int type)
168 struct hostent *hp = 0;
175 switch (service_order[nserv]) {
179 hp = _gethostbyhtaddr(addr, len, type);
182 hp = _gethostbydnsaddr(addr, len, type);
185 hp = _gethostbynisaddr(addr, len, type);
197 * Temporary function (not thread safe)
199 int gethostbyaddr_r(const char *addr, int len, int type,
200 struct hostent *result, struct hostent_data *buffer)
204 if ((hp = gethostbyaddr(addr, len, type)) == NULL) {
207 memcpy(result, hp, sizeof(struct hostent));
218 _sethosthtent(stayopen);
219 _sethostdnsent(stayopen);