xref: /aosp_15_r20/external/libwebsockets/lib/plat/freertos/freertos-misc.c (revision 1c60b9aca93fdbc9b5f19b2d2194c91294b22281)
1*1c60b9acSAndroid Build Coastguard Worker /*
2*1c60b9acSAndroid Build Coastguard Worker  * libwebsockets - small server side websockets and web server implementation
3*1c60b9acSAndroid Build Coastguard Worker  *
4*1c60b9acSAndroid Build Coastguard Worker  * Copyright (C) 2010 - 2019 Andy Green <[email protected]>
5*1c60b9acSAndroid Build Coastguard Worker  *
6*1c60b9acSAndroid Build Coastguard Worker  * Permission is hereby granted, free of charge, to any person obtaining a copy
7*1c60b9acSAndroid Build Coastguard Worker  * of this software and associated documentation files (the "Software"), to
8*1c60b9acSAndroid Build Coastguard Worker  * deal in the Software without restriction, including without limitation the
9*1c60b9acSAndroid Build Coastguard Worker  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10*1c60b9acSAndroid Build Coastguard Worker  * sell copies of the Software, and to permit persons to whom the Software is
11*1c60b9acSAndroid Build Coastguard Worker  * furnished to do so, subject to the following conditions:
12*1c60b9acSAndroid Build Coastguard Worker  *
13*1c60b9acSAndroid Build Coastguard Worker  * The above copyright notice and this permission notice shall be included in
14*1c60b9acSAndroid Build Coastguard Worker  * all copies or substantial portions of the Software.
15*1c60b9acSAndroid Build Coastguard Worker  *
16*1c60b9acSAndroid Build Coastguard Worker  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17*1c60b9acSAndroid Build Coastguard Worker  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18*1c60b9acSAndroid Build Coastguard Worker  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19*1c60b9acSAndroid Build Coastguard Worker  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20*1c60b9acSAndroid Build Coastguard Worker  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21*1c60b9acSAndroid Build Coastguard Worker  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22*1c60b9acSAndroid Build Coastguard Worker  * IN THE SOFTWARE.
23*1c60b9acSAndroid Build Coastguard Worker  */
24*1c60b9acSAndroid Build Coastguard Worker 
25*1c60b9acSAndroid Build Coastguard Worker #include "private-lib-core.h"
26*1c60b9acSAndroid Build Coastguard Worker 
27*1c60b9acSAndroid Build Coastguard Worker /*
28*1c60b9acSAndroid Build Coastguard Worker  * Normally you don't want this, use lws_sul instead inside the event loop.
29*1c60b9acSAndroid Build Coastguard Worker  * But sometimes for drivers it makes sense, so there's an internal-only
30*1c60b9acSAndroid Build Coastguard Worker  * crossplatform api for it.
31*1c60b9acSAndroid Build Coastguard Worker  */
32*1c60b9acSAndroid Build Coastguard Worker 
33*1c60b9acSAndroid Build Coastguard Worker void
lws_msleep(unsigned int ms)34*1c60b9acSAndroid Build Coastguard Worker lws_msleep(unsigned int ms)
35*1c60b9acSAndroid Build Coastguard Worker {
36*1c60b9acSAndroid Build Coastguard Worker 	vTaskDelay(portTICK_PERIOD_MS > ms ? 1 : ms / portTICK_PERIOD_MS);
37*1c60b9acSAndroid Build Coastguard Worker }
38*1c60b9acSAndroid Build Coastguard Worker 
39*1c60b9acSAndroid Build Coastguard Worker lws_usec_t
lws_now_usecs(void)40*1c60b9acSAndroid Build Coastguard Worker lws_now_usecs(void)
41*1c60b9acSAndroid Build Coastguard Worker {
42*1c60b9acSAndroid Build Coastguard Worker 	struct timeval tv;
43*1c60b9acSAndroid Build Coastguard Worker 	gettimeofday(&tv, NULL);
44*1c60b9acSAndroid Build Coastguard Worker 	return ((unsigned long long)tv.tv_sec * 1000000LL) + tv.tv_usec;
45*1c60b9acSAndroid Build Coastguard Worker }
46*1c60b9acSAndroid Build Coastguard Worker 
47*1c60b9acSAndroid Build Coastguard Worker size_t
lws_get_random(struct lws_context * context,void * buf,size_t len)48*1c60b9acSAndroid Build Coastguard Worker lws_get_random(struct lws_context *context, void *buf, size_t len)
49*1c60b9acSAndroid Build Coastguard Worker {
50*1c60b9acSAndroid Build Coastguard Worker #if defined(LWS_WITH_ESP32)
51*1c60b9acSAndroid Build Coastguard Worker 	uint8_t *pb = buf;
52*1c60b9acSAndroid Build Coastguard Worker 
53*1c60b9acSAndroid Build Coastguard Worker 	while (len) {
54*1c60b9acSAndroid Build Coastguard Worker 		uint32_t r = esp_random();
55*1c60b9acSAndroid Build Coastguard Worker 		uint8_t *p = (uint8_t *)&r;
56*1c60b9acSAndroid Build Coastguard Worker 		int b = 4;
57*1c60b9acSAndroid Build Coastguard Worker 
58*1c60b9acSAndroid Build Coastguard Worker 		if (len < (size_t)b)
59*1c60b9acSAndroid Build Coastguard Worker 			b = len;
60*1c60b9acSAndroid Build Coastguard Worker 
61*1c60b9acSAndroid Build Coastguard Worker 		len -= b;
62*1c60b9acSAndroid Build Coastguard Worker 
63*1c60b9acSAndroid Build Coastguard Worker 		while (b--)
64*1c60b9acSAndroid Build Coastguard Worker 			*pb++ = p[b];
65*1c60b9acSAndroid Build Coastguard Worker 	}
66*1c60b9acSAndroid Build Coastguard Worker 
67*1c60b9acSAndroid Build Coastguard Worker 	return pb - (uint8_t *)buf;
68*1c60b9acSAndroid Build Coastguard Worker #else
69*1c60b9acSAndroid Build Coastguard Worker #if defined(LWS_WITH_MBEDTLS)
70*1c60b9acSAndroid Build Coastguard Worker 	int n;
71*1c60b9acSAndroid Build Coastguard Worker 
72*1c60b9acSAndroid Build Coastguard Worker 	n = mbedtls_ctr_drbg_random(&context->mcdc, buf, len);
73*1c60b9acSAndroid Build Coastguard Worker 	if (!n)
74*1c60b9acSAndroid Build Coastguard Worker 		return len;
75*1c60b9acSAndroid Build Coastguard Worker 
76*1c60b9acSAndroid Build Coastguard Worker 	/* failed */
77*1c60b9acSAndroid Build Coastguard Worker 
78*1c60b9acSAndroid Build Coastguard Worker 	lwsl_err("%s: mbedtls_ctr_drbg_random returned 0x%x\n", __func__, n);
79*1c60b9acSAndroid Build Coastguard Worker #endif
80*1c60b9acSAndroid Build Coastguard Worker 	return 0;
81*1c60b9acSAndroid Build Coastguard Worker #endif
82*1c60b9acSAndroid Build Coastguard Worker }
83*1c60b9acSAndroid Build Coastguard Worker 
84*1c60b9acSAndroid Build Coastguard Worker 
lwsl_emit_syslog(int level,const char * line)85*1c60b9acSAndroid Build Coastguard Worker void lwsl_emit_syslog(int level, const char *line)
86*1c60b9acSAndroid Build Coastguard Worker {
87*1c60b9acSAndroid Build Coastguard Worker 	lwsl_emit_stderr(level, line);
88*1c60b9acSAndroid Build Coastguard Worker }
89*1c60b9acSAndroid Build Coastguard Worker 
90*1c60b9acSAndroid Build Coastguard Worker int
lws_plat_drop_app_privileges(struct lws_context * context,int actually_init)91*1c60b9acSAndroid Build Coastguard Worker lws_plat_drop_app_privileges(struct lws_context *context, int actually_init)
92*1c60b9acSAndroid Build Coastguard Worker {
93*1c60b9acSAndroid Build Coastguard Worker 	return 0;
94*1c60b9acSAndroid Build Coastguard Worker }
95*1c60b9acSAndroid Build Coastguard Worker 
96*1c60b9acSAndroid Build Coastguard Worker int
lws_plat_recommended_rsa_bits(void)97*1c60b9acSAndroid Build Coastguard Worker lws_plat_recommended_rsa_bits(void)
98*1c60b9acSAndroid Build Coastguard Worker {
99*1c60b9acSAndroid Build Coastguard Worker 	/*
100*1c60b9acSAndroid Build Coastguard Worker 	 * 2048-bit key generation takes up to a minute on ESP32, 4096
101*1c60b9acSAndroid Build Coastguard Worker 	 * is like 15 minutes +
102*1c60b9acSAndroid Build Coastguard Worker 	 */
103*1c60b9acSAndroid Build Coastguard Worker 	return 2048;
104*1c60b9acSAndroid Build Coastguard Worker }
105