text: /*
   * libwebsockets - small server side websockets and web server implementation
   *
   * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to
   * deal in the Software without restriction, including without limitation the
   * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   * sell copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
   * IN THE SOFTWARE.
   */
  
  #include "private-lib-core.h"
  
  /*
   * Normally you don't want this, use lws_sul instead inside the event loop.
   * But sometimes for drivers it makes sense, so there's an internal-only
   * crossplatform api for it.
   */
  
  void
  lws_msleep(unsigned int ms)
  {
  	vTaskDelay(portTICK_PERIOD_MS > ms ? 1 : ms / portTICK_PERIOD_MS);
  }
  
  lws_usec_t
  lws_now_usecs(void)
  {
  	struct timeval tv;
  	gettimeofday(&tv, NULL);
  	return ((unsigned long long)tv.tv_sec * 1000000LL) + tv.tv_usec;
  }
  
  size_t
  lws_get_random(struct lws_context *context, void *buf, size_t len)
  {
  #if defined(LWS_WITH_ESP32)
  	uint8_t *pb = buf;
  
  	while (len) {
  		uint32_t r = esp_random();
  		uint8_t *p = (uint8_t *)&r;
  		int b = 4;
  
  		if (len < (size_t)b)
  			b = len;
  
  		len -= b;
  
  		while (b--)
  			*pb++ = p[b];
  	}
  
  	return pb - (uint8_t *)buf;
  #else
  #if defined(LWS_WITH_MBEDTLS)
  	int n;
  
  	n = mbedtls_ctr_drbg_random(&context->mcdc, buf, len);
  	if (!n)
  		return len;
  
  	/* failed */
  
  	lwsl_err("%s: mbedtls_ctr_drbg_random returned 0x%x\n", __func__, n);
  #endif
  	return 0;
  #endif
  }
  
  
  void lwsl_emit_syslog(int level, const char *line)
  {
  }
  
  int
  lws_plat_drop_app_privileges(struct lws_context *context, int actually_init)
  {
  	return 0;
  }
  
  int
  lws_plat_recommended_rsa_bits(void)
  {
  	/*
  	 * 2048-bit key generation takes up to a minute on ESP32, 4096
  	 * is like 15 minutes +
  	 */
  	return 2048;
  }
  