Adding to the functionality of the ESP32 library in order to provide a printable echo of a remote IP connection in addition to optional code to control specific IP access to the server as the server can only take one connection at a time.

Author: mytechnotalent

adafruit_esp32spi/adafruit_esp32spi.py

@@ -82,6 +82,7 @@
 _GET_HOST_BY_NAME_CMD  = const(0x35)
 _START_SCAN_NETWORKS   = const(0x36)
 _GET_FW_VERSION_CMD    = const(0x37)
+_GET_REMOTE_DATA_CMD   = const(0x3A)
 _GET_TIME              = const(0x3B)
 _PING_CMD              = const(0x3E)
 
@@ -768,3 +769,8 @@ def get_time(self):
             resp = self._send_command_get_response(_GET_TIME)
             return struct.unpack('<i', resp[0])
         raise RuntimeError("Must be connected to WiFi before obtaining NTP.")
+
+    def get_remote_data(self, socket_num):
+        self._socknum_ll[0][0] = socket_num
+        resp = self._send_command_get_response(_GET_REMOTE_DATA_CMD, self._socknum_ll, reply_params=2)
+        return resp[0]

adafruit_esp32spi/adafruit_esp32spi_wsgiserver.py

@@ -98,9 +98,23 @@ def update_poll(self):
         """
         self.client_available()
         if (self._client_sock and self._client_sock.available()):
+            self.print_remote_ip()
             environ = self._get_environ(self._client_sock)
             result = self.application(environ, self._start_response)
             self.finish_response(result)
+        """
+        Optional routine to control what IP connects to your ESP server
+        as it forces a single connection as the server can't handle more
+        than one request at a time.
+        """
+        # self.client_available()
+        # if (self._client_sock and self._client_sock.available()):
+        #    result = self.check_remote_ip()
+        #    if result == "192.168.4.2":
+        #        self.print_remote_ip()
+        #        environ = self._get_environ(self._client_sock)
+        #        result = self.application(environ, self._start_response)
+        #        self.finish_response(result)
 
     def finish_response(self, result):
         """
@@ -216,3 +230,13 @@ def _get_environ(self, client):
             env[key] = value
 
         return env
+
+    def check_remote_ip(self):
+        sock_num = self._client_sock.socknum
+        remote_ip = _the_interface.get_remote_data(sock_num)
+        return _the_interface.pretty_ip(remote_ip)
+
+    def print_remote_ip(self):
+        sock_num = self._client_sock.socknum
+        remote_ip = _the_interface.get_remote_data(sock_num)
+        print("Remote Connection Established:  " + _the_interface.pretty_ip(remote_ip))