1 /*
2 *
3 * BlueZ - Bluetooth protocol stack for Linux
4 *
5 * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 *
22 */
23
24 #ifdef HAVE_CONFIG_H
25 #include <config.h>
26 #endif
27
28 #include <stdio.h>
29 #include <errno.h>
30 #include <fcntl.h>
31 #include <unistd.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <sys/stat.h>
35 #include <sys/mman.h>
36
37 #include "oui.h"
38
39 /* http://standards.ieee.org/regauth/oui/oui.txt */
40
ouitocomp(const char * oui)41 char *ouitocomp(const char *oui)
42 {
43 struct stat st;
44 char *str, *map, *off, *end;
45 int fd;
46
47 fd = open(OUIFILE, O_RDONLY);
48 if (fd < 0)
49 return NULL;
50
51 if (fstat(fd, &st) < 0) {
52 close(fd);
53 return NULL;
54 }
55
56 str = malloc(128);
57 if (!str) {
58 close(fd);
59 return NULL;
60 }
61
62 memset(str, 0, 128);
63
64 map = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
65 if (!map || map == MAP_FAILED) {
66 free(str);
67 close(fd);
68 return NULL;
69 }
70
71 off = strstr(map, oui);
72 if (off) {
73 off += 18;
74 end = strpbrk(off, "\r\n");
75 strncpy(str, off, end - off);
76 } else {
77 free(str);
78 str = NULL;
79 }
80
81 munmap(map, st.st_size);
82
83 close(fd);
84
85 return str;
86 }
87
oui2comp(const char * oui,char * comp,size_t size)88 int oui2comp(const char *oui, char *comp, size_t size)
89 {
90 char *tmp;
91
92 tmp = ouitocomp(oui);
93 if (!tmp)
94 return -1;
95
96 snprintf(comp, size, "%s", tmp);
97
98 free(tmp);
99
100 return 0;
101 }
102