Add nsswitch support.
[dragonfly.git] / lib / libc / net / getnetbynis.c
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1/*-
2 * Copyright (c) 1994, Garrett Wollman
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
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.
12 *
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
23 * SUCH DAMAGE.
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24 *
25 * $FreeBSD: src/lib/libc/net/getnetbynis.c,v 1.11 1999/08/28 00:00:07 peter Exp $
076e5234 26 * $DragonFly: src/lib/libc/net/getnetbynis.c,v 1.4 2005/11/13 02:04:47 swildner Exp $
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27 */
28
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29#include <sys/param.h>
30#include <sys/socket.h>
31#include <netinet/in.h>
32#include <arpa/inet.h>
33#include <netdb.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <ctype.h>
37#include <errno.h>
38#include <string.h>
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39#include <stdarg.h>
40#include <nsswitch.h>
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41#include <arpa/nameser.h>
42#ifdef YP
43#include <rpc/rpc.h>
44#include <rpcsvc/yp_prot.h>
45#include <rpcsvc/ypclnt.h>
46#endif
47
48#define MAXALIASES 35
49#define MAXADDRS 35
50
51#ifdef YP
52static char *host_aliases[MAXALIASES];
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53
54static struct netent *
076e5234 55_getnetbynis(const char *name, char *map, int af)
984263bc 56{
660c873b 57 char *cp, **q;
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58 static char *result;
59 int resultlen;
60 static struct netent h;
ed5d5720 61 static char *domain = NULL;
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62 static char ypbuf[YPMAXRECORD + 2];
63
64 switch(af) {
65 case AF_INET:
66 break;
67 default:
68 case AF_INET6:
69 errno = EAFNOSUPPORT;
70 return NULL;
71 }
72
ed5d5720 73 if (domain == NULL)
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74 if (yp_get_default_domain (&domain))
75 return (NULL);
76
77 if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
78 return (NULL);
79
80 bcopy((char *)result, (char *)&ypbuf, resultlen);
81 ypbuf[resultlen] = '\0';
82 free(result);
83 result = (char *)&ypbuf;
84
85 if ((cp = index(result, '\n')))
86 *cp = '\0';
87
88 cp = strpbrk(result, " \t");
89 *cp++ = '\0';
90 h.n_name = result;
91
92 while (*cp == ' ' || *cp == '\t')
93 cp++;
94
95 h.n_net = inet_network(cp);
96 h.n_addrtype = AF_INET;
97
98 q = h.n_aliases = host_aliases;
99 cp = strpbrk(cp, " \t");
100 if (cp != NULL)
101 *cp++ = '\0';
102 while (cp && *cp) {
103 if (*cp == ' ' || *cp == '\t') {
104 cp++;
105 continue;
106 }
107 if (q < &host_aliases[MAXALIASES - 1])
108 *q++ = cp;
109 cp = strpbrk(cp, " \t");
110 if (cp != NULL)
111 *cp++ = '\0';
112 }
113 *q = NULL;
114 return (&h);
984263bc 115}
ed5d5720 116#endif /* YP */
984263bc 117
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118int
119_nis_getnetbyname(void *rval, void *cb_data, va_list ap)
984263bc 120{
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121#ifdef YP
122 const char *name;
123
124 name = va_arg(ap, const char *);
125
126 *(struct netent **)rval = _getnetbynis(name, "networks.byname", AF_INET);
127 return (*(struct netent **)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND;
128#else
129 return NS_UNAVAIL;
130#endif
131
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132}
133
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134int
135_nis_getnetbyaddr(void *rval, void *cb_data, va_list ap)
984263bc 136{
ed5d5720 137#ifdef YP
984263bc 138 char *str, *cp;
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139 unsigned long addr, net2;
140 int af, nn;
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141 unsigned int netbr[4];
142 char buf[MAXDNAME];
143
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144 addr = va_arg(ap, unsigned long);
145 af = va_arg(ap, int);
146
147 *(struct netent **)rval = NULL;
148
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149 if (af != AF_INET) {
150 errno = EAFNOSUPPORT;
ed5d5720 151 return NS_UNAVAIL;
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152 }
153
154 for (nn = 4, net2 = addr; net2; net2 >>= 8) {
155 netbr[--nn] = net2 & 0xff;
156 }
157
158 switch (nn) {
159 case 3: /* Class A */
160 sprintf(buf, "%u", netbr[3]);
161 break;
162 case 2: /* Class B */
163 sprintf(buf, "%u.%u", netbr[2], netbr[3]);
164 break;
165 case 1: /* Class C */
166 sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]);
167 break;
168 case 0: /* Class D - E */
169 sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1],
170 netbr[2], netbr[3]);
171 break;
172 }
173
174 str = (char *)&buf;
175 cp = str + (strlen(str) - 2);
176
177 while(!strcmp(cp, ".0")) {
178 *cp = '\0';
179 cp = str + (strlen(str) - 2);
180 }
181
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182 *(struct netent **)rval = _getnetbynis(str, "networks.byaddr", af);
183 return (*(struct netent**)rval != NULL) ? NS_SUCCESS : NS_NOTFOUND;
184#else
185 return NS_UNAVAIL;
186#endif /* YP */
984263bc 187}