Implementation of ESP32C3 boilerplate -- not yet finished but functional.

src/core/state.cpp

@@ -0,0 +1,89 @@
+#include "../app.h"
+
+#include <mbedtls/md.h>
+
+const char *APP_VERSION = "0.1.0";
+const char *PROJECT_NAME_VALUE = PROJECT_NAME;
+const char *DEFAULT_ADMIN = "admin";
+const char *DEFAULT_UPDATE_URL = "http://example.com/update.tslpkg";
+const uint32_t FACTORY_RESET_HOLD_MS = 10000;
+const size_t MAX_USERS = 8;
+const size_t MAX_TOKENS = 8;
+const bool DEFAULT_LED_INVERTED = true;
+const byte DNS_PORT = 53;
+const IPAddress SETUP_AP_IP(192, 168, 1, 1);
+const IPAddress SETUP_AP_GATEWAY(192, 168, 1, 1);
+const IPAddress SETUP_AP_SUBNET(255, 255, 255, 0);
+
+WebServer server(80);
+DNSServer dnsServer;
+Preferences prefs;
+Token tokens[8];
+LogLevel currentLogLevel = LOG_INFO;
+size_t maxLogBytes = 50 * 1024;
+bool setupMode = false;
+uint8_t ledBrightness = 0;
+bool ledInverted = DEFAULT_LED_INVERTED;
+String updateUrl = DEFAULT_UPDATE_URL;
+
+String chipId() {
+  uint64_t mac = ESP.getEfuseMac();
+  char buf[13];
+  snprintf(buf, sizeof(buf), "%04X%08X", (uint16_t)(mac >> 32), (uint32_t)mac);
+  return String(buf);
+}
+
+String deviceName() {
+  String suffix = chipId().substring(6);
+  String base = PROJECT_NAME_VALUE;
+  base.trim();
+  for (size_t i = 0; i < base.length(); i++) {
+    char c = base[i];
+    if (!(isalnum(c) || c == '-')) base.setCharAt(i, '-');
+  }
+  while (base.startsWith("-")) base.remove(0, 1);
+  while (base.endsWith("-")) base.remove(base.length() - 1);
+  if (!base.length()) base = "ESP32C3";
+
+  const size_t maxHostnameLength = 31;
+  size_t maxBaseLength = maxHostnameLength - 1 - suffix.length();
+  if (base.length() > maxBaseLength) base = base.substring(0, maxBaseLength);
+  while (base.endsWith("-")) base.remove(base.length() - 1);
+  return base + "-" + suffix;
+}
+
+String sha256(const String &input) {
+  uint8_t digest[32];
+  mbedtls_md_context_t ctx;
+  mbedtls_md_init(&ctx);
+  mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), 0);
+  mbedtls_md_starts(&ctx);
+  mbedtls_md_update(&ctx, (const unsigned char *)input.c_str(), input.length());
+  mbedtls_md_finish(&ctx, digest);
+  mbedtls_md_free(&ctx);
+  char out[65];
+  for (int i = 0; i < 32; i++) snprintf(out + (i * 2), 3, "%02x", digest[i]);
+  out[64] = 0;
+  return String(out);
+}
+
+String passwordHash(const String &password) {
+  return sha256(chipId() + ":" + password);
+}
+
+String prefString(const char *key, const String &fallback) {
+  return prefs.isKey(key) ? prefs.getString(key, fallback) : fallback;
+}
+
+void loadSettings() {
+  prefs.begin("boiler", false);
+  if (!prefs.getBool("ledPolV2", false)) {
+    prefs.putBool("ledInv", DEFAULT_LED_INVERTED);
+    prefs.putBool("ledPolV2", true);
+  }
+  currentLogLevel = (LogLevel)prefs.getUChar("logLevel", LOG_INFO);
+  maxLogBytes = prefs.getUInt("logMax", 50 * 1024);
+  ledInverted = prefs.getBool("ledInv", DEFAULT_LED_INVERTED);
+  ledBrightness = constrain(prefs.getUChar("ledBright", 0), 0, 100);
+  updateUrl = prefString("updateUrl", DEFAULT_UPDATE_URL);
+}