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1 /*
2  * esp32 / esp-idf NV settings shim
3  *
4  * Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to
8  * deal in the Software without restriction, including without limitation the
9  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10  * sell copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22  * IN THE SOFTWARE.
23  */
24 
25 #include <private-lib-core.h>
26 
27 #include <nvs_flash.h>
28 
29 int
lws_settings_plat_get(lws_settings_instance_t * si,const char * name,uint8_t * dest,size_t * max_actual)30 lws_settings_plat_get(lws_settings_instance_t *si, const char *name,
31 		      uint8_t *dest, size_t *max_actual)
32 {
33 	int n;
34 
35 	n = nvs_flash_init_partition((const char *)si->opaque_plat);
36 
37 	lwsl_notice("%s: init partition %d\n", __func__, n);
38 	if (n == ESP_ERR_NOT_FOUND)
39 		return 1;
40 
41 	if (nvs_open_from_partition((const char *)si->opaque_plat,
42 				    "_lws_settings", NVS_READONLY,
43 				    (nvs_handle_t *)&si->handle_plat))
44 		return 1;
45 
46 	n = nvs_get_blob((nvs_handle_t)si->handle_plat,
47 			 name, dest, max_actual);
48 
49 	nvs_close((nvs_handle_t)si->handle_plat);
50 
51 	return !!n;
52 }
53 
54 int
lws_settings_plat_set(lws_settings_instance_t * si,const char * name,const uint8_t * src,size_t len)55 lws_settings_plat_set(lws_settings_instance_t *si, const char *name,
56 		      const uint8_t *src, size_t len)
57 {
58 	int n = nvs_flash_init_partition((const char *)si->opaque_plat);
59 
60 	lwsl_notice("%s: init partition %d\n", __func__, n);
61 	if (n == ESP_ERR_NOT_FOUND)
62 		return 1;
63 
64 	if (nvs_open_from_partition((const char *)si->opaque_plat,
65 				    "_lws_settings", NVS_READWRITE,
66 				    (nvs_handle_t *)&si->handle_plat))
67 		return 1;
68 
69 	n = nvs_set_blob((nvs_handle_t)si->handle_plat, name, src, len);
70 
71 	nvs_commit((nvs_handle_t)si->handle_plat);
72 	nvs_close((nvs_handle_t)si->handle_plat);
73 
74 	return 0;
75 }
76