summaryrefslogtreecommitdiffstats
path: root/lib/libc/net/gethostnamadr.c
blob: 697529af6c4f219062b3bab8b31129d26dd72837 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/*-
 * Copyright (c) 1994, Garrett Wollman
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] =
  "$FreeBSD$";
#endif /* LIBC_SCCS and not lint */

#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdarg.h>
#include <nsswitch.h>
#include <arpa/nameser.h>		/* XXX hack for _res */
#include <resolv.h>			/* XXX hack for _res */

extern int _ht_gethostbyname(void *, void *, va_list);
extern int _dns_gethostbyname(void *, void *, va_list);
extern int _nis_gethostbyname(void *, void *, va_list);
extern int _ht_gethostbyaddr(void *, void *, va_list);
extern int _dns_gethostbyaddr(void *, void *, va_list);
extern int _nis_gethostbyaddr(void *, void *, va_list);

/* Host lookup order if nsswitch.conf is broken or nonexistant */
static const ns_src default_src[] = { 
	{ NSSRC_FILES, NS_SUCCESS },
	{ NSSRC_DNS, NS_SUCCESS },
	{ 0 }
};

struct hostent *
gethostbyname(const char *name)
{
	struct hostent *hp;

	if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
		h_errno = NETDB_INTERNAL;
		return (NULL);
	}
	if (_res.options & RES_USE_INET6) {		/* XXX */
		hp = gethostbyname2(name, AF_INET6);	/* XXX */
		if (hp)					/* XXX */
			return (hp);			/* XXX */
	}						/* XXX */
	return (gethostbyname2(name, AF_INET));
}

struct hostent *
gethostbyname2(const char *name, int type)
{
	struct hostent *hp = 0;
	int rval;

	static const ns_dtab dtab[] = {
		NS_FILES_CB(_ht_gethostbyname, NULL)
		{ NSSRC_DNS, _dns_gethostbyname, NULL },
		NS_NIS_CB(_nis_gethostbyname, NULL) /* force -DHESIOD */
		{ 0 }
	};       
	
	rval = nsdispatch((void *)&hp, dtab, NSDB_HOSTS, "gethostbyname",
			  default_src, name, type);

	if (rval != NS_SUCCESS)
		return NULL;
	else
		return hp;
}

struct hostent *
gethostbyaddr(const char *addr, int len, int type)
{
	struct hostent *hp = 0;
	int rval;

	static const ns_dtab dtab[] = {
		NS_FILES_CB(_ht_gethostbyaddr, NULL)
		{ NSSRC_DNS, _dns_gethostbyaddr, NULL },
		NS_NIS_CB(_nis_gethostbyaddr, NULL) /* force -DHESIOD */
		{ 0 }
	};       

	rval = nsdispatch((void *)&hp, dtab, NSDB_HOSTS, "gethostbyaddr",
			  default_src, addr, len, type);

	if (rval != NS_SUCCESS)
		return NULL;
	else
		return hp;
}

struct hostent_data;

/*
 * Temporary function (not thread safe)
 */
int gethostbyaddr_r(const char *addr, int len, int type,
	struct hostent *result, struct hostent_data *buffer)
{
	struct hostent *hp;
	int ret;
	if ((hp = gethostbyaddr(addr, len, type)) == NULL) {
		ret = -1;
	} else {
		memcpy(result, hp, sizeof(struct hostent));
		ret = 0;
	}
	return(ret);
}

void
sethostent(stayopen)
	int stayopen;
{
	_sethosthtent(stayopen);
	_sethostdnsent(stayopen);
}

void
endhostent()
{
	_endhosthtent();
	_endhostdnsent();
}
OpenPOWER on IntegriCloud