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 1.6 2007/12/29 22:55:29 matthias 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
);
192 sethostent(int stayopen
)
194 _sethosthtent(stayopen
);
195 _sethostdnsent(stayopen
);