1 /*
2 *
3 * BlueZ - Bluetooth protocol stack for Linux
4 *
5 * Copyright (C) 2004-2009 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
41 #define OUIFILE "/var/lib/misc/oui.txt"
42
ouitocomp(const char * oui)43 char *ouitocomp(const char *oui)
44 {
45 struct stat st;
46 char *str, *map, *off, *end;
47 int fd;
48
49 fd = open("oui.txt", O_RDONLY);
50 if (fd < 0) {
51 fd = open(OUIFILE, O_RDONLY);
52 if (fd < 0) {
53 fd = open("/usr/share/misc/oui.txt", O_RDONLY);
54 if (fd < 0)
55 return NULL;
56 }
57 }
58
59 if (fstat(fd, &st) < 0) {
60 close(fd);
61 return NULL;
62 }
63
64 str = malloc(128);
65 if (!str) {
66 close(fd);
67 return NULL;
68 }
69
70 memset(str, 0, 128);
71
72 map = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
73 if (!map || map == MAP_FAILED) {
74 free(str);
75 close(fd);
76 return NULL;
77 }
78
79 off = strstr(map, oui);
80 if (off) {
81 off += 18;
82 end = strpbrk(off, "\r\n");
83 strncpy(str, off, end - off);
84 } else {
85 free(str);
86 str = NULL;
87 }
88
89 munmap(map, st.st_size);
90
91 close(fd);
92
93 return str;
94 }
95
oui2comp(const char * oui,char * comp,size_t size)96 int oui2comp(const char *oui, char *comp, size_t size)
97 {
98 char *tmp;
99
100 tmp = ouitocomp(oui);
101 if (!tmp)
102 return -1;
103
104 snprintf(comp, size, "%s", tmp);
105
106 free(tmp);
107
108 return 0;
109 }
110