helpers.cpp

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#include "esphome/core/helpers.h"
 
#ifdef USE_HOST
 
#ifndef _WIN32
#include <net/if.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#endif
#include <unistd.h>
 
#include "esphome/core/defines.h"
#include "esphome/core/log.h"
 
namespace esphome {
 
ESPHOME_LOG_TAG(TAG, "helpers.host");
 
bool random_bytes(uint8_t *data, size_t len) {
  FILE *fp = fopen("/dev/urandom", "r");
  if (fp == nullptr) {
    ESP_LOGW(TAG, "Could not open /dev/urandom, errno=%d", errno);
    exit(1);
  }
  size_t read = fread(data, 1, len, fp);
  if (read != len) {
    ESP_LOGW(TAG, "Not enough data from /dev/urandom");
    exit(1);
  }
  fclose(fp);
  return true;
}
 
// The host has no interrupts to mask
InterruptLock::InterruptLock() {}
InterruptLock::~InterruptLock() {}
 
// Host platform uses std::mutex for proper thread synchronization
Mutex::Mutex() { handle_ = new std::mutex(); }
Mutex::~Mutex() { delete static_cast<std::mutex *>(handle_); }
void Mutex::lock() { static_cast<std::mutex *>(handle_)->lock(); }
bool Mutex::try_lock() { return static_cast<std::mutex *>(handle_)->try_lock(); }
void Mutex::unlock() { static_cast<std::mutex *>(handle_)->unlock(); }
 
void get_mac_address_raw(uint8_t *mac) {  // NOLINT(readability-non-const-parameter)
  static constexpr uint8_t HOST_MAC_ADDRESS[MAC_ADDRESS_SIZE] = USE_ESPHOME_HOST_MAC_ADDRESS;
  memcpy(mac, HOST_MAC_ADDRESS, sizeof(HOST_MAC_ADDRESS));
}
 
}  // namespace esphome
 
#endif  // USE_HOST