Use local UDP messages instead of web server

include/configurations/EthernetConfiguration.h

@@ -28,4 +28,6 @@ struct EthernetConfiguration {
     // The IP address of the DNS server, if DHCP fails
     uint8_t manualDnsAddress[4];
 
+    // The port for the incoming UDP connection
+    uint16_t udpPort;
 };

include/controller.h

@@ -3,14 +3,13 @@
 #include "server.h"
 #include "servo.h"
 #include "message.h"
-#include <ESPAsyncWebServer.h>
 #include "configurations/EthernetConfiguration.h"
 #include "configurations/KeyConfiguration.h"
 
 class SesameController: public ServerConnectionCallbacks {
 
 public:
-    SesameController(uint16_t localWebServerPort);
+    SesameController();
 
     void configure(ServoConfiguration servoConfig, ServerConfiguration serverConfig, EthernetConfiguration ethernetConfig, KeyConfiguration keyConfig);
 
@@ -22,7 +21,16 @@ private:
 
     ServerConnection server;
     ServoController servo;
-    AsyncWebServer localWebServer;
+
+    // UDP
+
+    // buffers for receiving and sending data
+    char udpReceiveBuffer[SIGNED_MESSAGE_SIZE];  // buffer to hold incoming packet
+
+    // An EthernetUDP instance to send and receive packets over UDP
+    EthernetUDP Udp;
+
+
 
     EthernetConfiguration ethernetConfig;
     bool ethernetIsConfigured = false;
@@ -52,7 +60,7 @@ private:
 
     // MARK: Local client callbacks
 
-    void handleLocalMessage(AsyncWebServerRequest *request);
+    void checkLocalMessage();
     
     // MARK: Socket Callbacks
 
@@ -76,7 +84,7 @@ private:
      * 
      * Note: Prepares the response in the outgoing message buffer.
      */
-    void processMessage(SignedMessage* message);
+    void processMessage(SignedMessage* message, bool shouldPerformUnlock);
 
     /**
      * @brief Checks that the message is valid and prepares a challenge.
@@ -105,7 +113,7 @@ private:
      * 
      * Note: Prepares the response in the outgoing message buffer.
      */
-    void completeUnlockRequest(Message* message);
+    void completeUnlockRequest(Message* message, bool shouldPerformUnlock);
 
     // MARK: Responses
 
@@ -117,12 +125,18 @@ private:
      */
     void prepareResponseBuffer(MessageResult event, Message* message = NULL);
 
+    /**
+     * @brief Read a message from the UDP port
+     * 
+     */
+    bool readLocalMessage();
+
     /**
      * @brief Send the prepared outgoing message to a locally connected client
      * 
      * @param request The original request of the client
      */
-    void sendPreparedLocalResponse(AsyncWebServerRequest *request);
+    void sendPreparedLocalResponse();
 
     /**
      * @brief Send the prepared outgoing message to the server
@@ -131,5 +145,5 @@ private:
 
     // MARK: Helper
 
-     bool convertHexMessageToBinary(const char* str);
+    bool convertHexMessageToBinary(const char* str);
 };