Adjust the bt_gethostbyaddr(3) prototype to match gethostbyaddr(3).
[dragonfly.git] / lib / libbluetooth / bluetooth.c
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1/* $NetBSD: bluetooth.c,v 1.1 2006/06/19 15:44:36 gdamore Exp $ */
2/* $DragonFly: src/lib/libbluetooth/bluetooth.c,v 1.1 2008/01/03 11:47:52 hasso Exp $ */
3
4/*
5 * bluetooth.c
6 *
7 * Copyright (c) 2001-2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $Id: bluetooth.c,v 1.1 2006/06/19 15:44:36 gdamore Exp $
32 * $FreeBSD: src/lib/libbluetooth/bluetooth.c,v 1.2 2004/03/05 08:10:17 markm Exp $
33 */
34
35#include <bluetooth.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39
40#define _PATH_BT_HOSTS "/etc/bluetooth/hosts"
41#define _PATH_BT_PROTOCOLS "/etc/bluetooth/protocols"
42#define MAXALIASES 35
43
44static FILE *hostf = NULL;
45static int host_stayopen = 0;
46static struct hostent host;
47static bdaddr_t host_addr;
48static char *host_addr_ptrs[2];
49static char *host_aliases[MAXALIASES];
50
51static FILE *protof = NULL;
52static int proto_stayopen = 0;
53static struct protoent proto;
54static char *proto_aliases[MAXALIASES];
55
56static char buf[BUFSIZ + 1];
57
58static int bt_hex_byte (char const *str);
59static int bt_hex_nibble (char nibble);
60
61struct hostent *
62bt_gethostbyname(char const *name)
63{
64 struct hostent *p;
65 char **cp;
66
67 bt_sethostent(host_stayopen);
68 while ((p = bt_gethostent()) != NULL) {
69 if (strcasecmp(p->h_name, name) == 0)
70 break;
71 for (cp = p->h_aliases; *cp != 0; cp++)
72 if (strcasecmp(*cp, name) == 0)
73 goto found;
74 }
75found:
76 bt_endhostent();
77
78 return (p);
79}
80
81struct hostent *
63bd4a35 82bt_gethostbyaddr(void const *addr, socklen_t len, int type)
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83{
84 struct hostent *p;
85
86 if (type != AF_BLUETOOTH || len != sizeof(bdaddr_t)) {
87 h_errno = NO_RECOVERY;
88 return (NULL);
89 }
90
91 bt_sethostent(host_stayopen);
92 while ((p = bt_gethostent()) != NULL)
93 if (p->h_addrtype == type && memcmp(p->h_addr, addr, len) == 0)
94 break;
95 bt_endhostent();
96
97 return (p);
98}
99
100struct hostent *
101bt_gethostent(void)
102{
103 char *p, *cp, **q;
104
105 if (hostf == NULL)
106 hostf = fopen(_PATH_BT_HOSTS, "r");
107
108 if (hostf == NULL) {
109 h_errno = NETDB_INTERNAL;
110 return (NULL);
111 }
112again:
113 if ((p = fgets(buf, sizeof(buf), hostf)) == NULL) {
114 h_errno = HOST_NOT_FOUND;
115 return (NULL);
116 }
117 if (*p == '#')
118 goto again;
119 if ((cp = strpbrk(p, "#\n")) == NULL)
120 goto again;
121 *cp = 0;
122 if ((cp = strpbrk(p, " \t")) == NULL)
123 goto again;
124 *cp++ = 0;
125 if (bt_aton(p, &host_addr) == 0)
126 goto again;
127 host_addr_ptrs[0] = (char *) &host_addr;
128 host_addr_ptrs[1] = NULL;
129 host.h_addr_list = host_addr_ptrs;
130 host.h_length = sizeof(host_addr);
131 host.h_addrtype = AF_BLUETOOTH;
132 while (*cp == ' ' || *cp == '\t')
133 cp++;
134 host.h_name = cp;
135 q = host.h_aliases = host_aliases;
136 if ((cp = strpbrk(cp, " \t")) != NULL)
137 *cp++ = 0;
138 while (cp != NULL && *cp != 0) {
139 if (*cp == ' ' || *cp == '\t') {
140 cp++;
141 continue;
142 }
143 if (q < &host_aliases[MAXALIASES - 1])
144 *q++ = cp;
145 if ((cp = strpbrk(cp, " \t")) != NULL)
146 *cp++ = 0;
147 }
148 *q = NULL;
149 h_errno = NETDB_SUCCESS;
150
151 return (&host);
152}
153
154void
155bt_sethostent(int stayopen)
156{
157 if (hostf == NULL)
158 hostf = fopen(_PATH_BT_HOSTS, "r");
159 else
160 rewind(hostf);
161
162 host_stayopen = stayopen;
163}
164
165void
166bt_endhostent(void)
167{
168 if (hostf != NULL && host_stayopen == 0) {
169 (void) fclose(hostf);
170 hostf = NULL;
171 }
172}
173
174struct protoent *
175bt_getprotobyname(char const *name)
176{
177 struct protoent *p;
178 char **cp;
179
180 bt_setprotoent(proto_stayopen);
181 while ((p = bt_getprotoent()) != NULL) {
182 if (strcmp(p->p_name, name) == 0)
183 break;
184 for (cp = p->p_aliases; *cp != 0; cp++)
185 if (strcmp(*cp, name) == 0)
186 goto found;
187 }
188found:
189 bt_endprotoent();
190
191 return (p);
192}
193
194struct protoent *
195bt_getprotobynumber(int num)
196{
197 struct protoent *p;
198
199 bt_setprotoent(proto_stayopen);
200 while ((p = bt_getprotoent()) != NULL)
201 if (p->p_proto == num)
202 break;
203 bt_endprotoent();
204
205 return (p);
206}
207
208struct protoent *
209bt_getprotoent(void)
210{
211 char *p, *cp, **q;
212
213 if (protof == NULL)
214 protof = fopen(_PATH_BT_PROTOCOLS, "r");
215
216 if (protof == NULL)
217 return (NULL);
218again:
219 if ((p = fgets(buf, sizeof(buf), protof)) == NULL)
220 return (NULL);
221 if (*p == '#')
222 goto again;
223 if ((cp = strpbrk(p, "#\n")) == NULL)
224 goto again;
225 *cp = '\0';
226 proto.p_name = p;
227 if ((cp = strpbrk(p, " \t")) == NULL)
228 goto again;
229 *cp++ = '\0';
230 while (*cp == ' ' || *cp == '\t')
231 cp++;
232 if ((p = strpbrk(cp, " \t")) != NULL)
233 *p++ = '\0';
234 proto.p_proto = (int)strtol(cp, NULL, 0);
235 q = proto.p_aliases = proto_aliases;
236 if (p != NULL) {
237 cp = p;
238 while (cp != NULL && *cp != 0) {
239 if (*cp == ' ' || *cp == '\t') {
240 cp++;
241 continue;
242 }
243 if (q < &proto_aliases[MAXALIASES - 1])
244 *q++ = cp;
245 if ((cp = strpbrk(cp, " \t")) != NULL)
246 *cp++ = '\0';
247 }
248 }
249 *q = NULL;
250
251 return (&proto);
252}
253
254void
255bt_setprotoent(int stayopen)
256{
257 if (protof == NULL)
258 protof = fopen(_PATH_BT_PROTOCOLS, "r");
259 else
260 rewind(protof);
261
262 proto_stayopen = stayopen;
263}
264
265void
266bt_endprotoent(void)
267{
268 if (protof != NULL) {
269 (void) fclose(protof);
270 protof = NULL;
271 }
272}
273
274char const *
275bt_ntoa(bdaddr_t const *ba, char *str)
276{
277 static char buffer[24];
278
279 if (str == NULL)
280 str = buffer;
281
282 sprintf(str, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
283 ba->b[5], ba->b[4], ba->b[3], ba->b[2], ba->b[1], ba->b[0]);
284
285 return (str);
286}
287
288int
289bt_aton(char const *str, bdaddr_t *ba)
290{
291 int i, b;
292 char *end = NULL;
293
294 memset(ba, 0, sizeof(*ba));
295
296 for (i = 5, end = strchr(str, ':');
297 i > 0 && *str != '\0' && end != NULL;
298 i --, str = end + 1, end = strchr(str, ':')) {
299 switch (end - str) {
300 case 1:
301 b = bt_hex_nibble(str[0]);
302 break;
303
304 case 2:
305 b = bt_hex_byte(str);
306 break;
307
308 default:
309 b = -1;
310 break;
311 }
312
313 if (b < 0)
314 return (0);
315
316 ba->b[i] = b;
317 }
318
319 if (i != 0 || end != NULL || *str == 0)
320 return (0);
321
322 switch (strlen(str)) {
323 case 1:
324 b = bt_hex_nibble(str[0]);
325 break;
326
327 case 2:
328 b = bt_hex_byte(str);
329 break;
330
331 default:
332 b = -1;
333 break;
334 }
335
336 if (b < 0)
337 return (0);
338
339 ba->b[i] = b;
340
341 return (1);
342}
343
344static int
345bt_hex_byte(char const *str)
346{
347 int n1, n2;
348
349 if ((n1 = bt_hex_nibble(str[0])) < 0)
350 return (-1);
351
352 if ((n2 = bt_hex_nibble(str[1])) < 0)
353 return (-1);
354
355 return ((((n1 & 0x0f) << 4) | (n2 & 0x0f)) & 0xff);
356}
357
358static int
359bt_hex_nibble(char nibble)
360{
361 if ('0' <= nibble && nibble <= '9')
362 return (nibble - '0');
363
364 if ('a' <= nibble && nibble <= 'f')
365 return (nibble - 'a' + 0xa);
366
367 if ('A' <= nibble && nibble <= 'F')
368 return (nibble - 'A' + 0xa);
369
370 return (-1);
371}