add parameter to provide local listening port.

Author: ffreddow

src/WireGuard-ESP32.h

@@ -27,6 +27,8 @@ class WireGuard
 	           const IPAddress& localIP,
 	           // Subnet of the WireGuard network
 	           const IPAddress& Subnet,
+			   // Port that the interface will try to bind to
+			   const uint16_t localPort,
 	           // Gateway of the WireGuard network
 	           const IPAddress& Gateway,
 	           // Our private key

src/WireGuard.cpp

@@ -56,6 +56,7 @@ static esp_err_t netif_set_default_in_lwip_ctx(void *ctx) {
 
 bool WireGuard::begin(const IPAddress& localIP,
                       const IPAddress& Subnet,
+                      const uint16_t localPort,
                       const IPAddress& Gateway,
                       const char* privateKey,
                       const char* remotePeerAddress,
@@ -80,7 +81,7 @@ bool WireGuard::begin(const IPAddress& localIP,
 
 	// Setup the WireGuard device structure
 	wg.private_key = privateKey;
-	wg.listen_port = remotePeerPort;
+	wg.listen_port = localPort;
 
 	wg.bind_netif = NULL;