1 /* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
4 */
5
6 #include "cras_device_blocklist.h"
7 #include "iniparser_wrapper.h"
8 #include "utlist.h"
9
10 struct cras_device_blocklist {
11 dictionary *ini;
12 };
13
14 /*
15 * Exported Interface
16 */
17
18 struct cras_device_blocklist *
cras_device_blocklist_create(const char * config_path)19 cras_device_blocklist_create(const char *config_path)
20 {
21 struct cras_device_blocklist *blocklist;
22 char ini_name[MAX_INI_NAME_LENGTH + 1];
23
24 blocklist = calloc(1, sizeof(*blocklist));
25 if (!blocklist)
26 return NULL;
27
28 snprintf(ini_name, MAX_INI_NAME_LENGTH, "%s/%s", config_path,
29 "device_blocklist");
30 ini_name[MAX_INI_NAME_LENGTH] = '\0';
31 blocklist->ini = iniparser_load_wrapper(ini_name);
32
33 return blocklist;
34 }
35
cras_device_blocklist_destroy(struct cras_device_blocklist * blocklist)36 void cras_device_blocklist_destroy(struct cras_device_blocklist *blocklist)
37 {
38 if (blocklist && blocklist->ini)
39 iniparser_freedict(blocklist->ini);
40 free(blocklist);
41 }
42
cras_device_blocklist_check(struct cras_device_blocklist * blocklist,unsigned vendor_id,unsigned product_id,unsigned desc_checksum,unsigned device_index)43 int cras_device_blocklist_check(struct cras_device_blocklist *blocklist,
44 unsigned vendor_id, unsigned product_id,
45 unsigned desc_checksum, unsigned device_index)
46 {
47 char ini_key[MAX_INI_KEY_LENGTH + 1];
48
49 if (!blocklist)
50 return 0;
51
52 snprintf(ini_key, MAX_INI_KEY_LENGTH, "USB_Outputs:%04x_%04x_%08x_%u",
53 vendor_id, product_id, desc_checksum, device_index);
54 ini_key[MAX_INI_KEY_LENGTH] = 0;
55 return iniparser_getboolean(blocklist->ini, ini_key, 0);
56 }
57