client can connect to provider and download an image.

Updated network component to add get mac address

components/network/network.cpp

@@ -452,3 +452,22 @@ internal void blink_last_ip_octet()
   }
 }
 #endif
+
+// === MAC Address ===
+
+esp_err_t get_mac_address(uint8_t *mac_out)
+{
+  // Prefer Ethernet if connected, fall back to WiFi
+  if (s_eth_netif != nullptr)
+  {
+    return esp_netif_get_mac(s_eth_netif, mac_out);
+  }
+
+  if (s_wifi_netif != nullptr)
+  {
+    return esp_netif_get_mac(s_wifi_netif, mac_out);
+  }
+
+  ESP_LOGE("NET", "No active network interface for MAC address");
+  return ESP_ERR_INVALID_STATE;
+}

components/network/network.hpp

@@ -15,3 +15,7 @@ esp_err_t connect_wifi(const char *ssid, const char *password,
                        bool blockUntilIPAcquired);
 void disconnect_wifi();
 esp_err_t check_wifi_connection(uint32_t timeoutSeconds);
+
+// Get the MAC address of the active network interface (WiFi STA).
+// mac_out must point to a buffer of at least 6 bytes.
+esp_err_t get_mac_address(uint8_t *mac_out);