feat: add ping sample using raknet-python

samples/ping.py

@@ -0,0 +1,40 @@
+import argparse
+import struct
+
+import raknet
+from raknet import RakPeer, MessageIdentifiers
+
+
+def main(port: int):
+    # https://wiki.vg/Raknet_Protocol#Unconnected_Pong
+    message = "MCPE;Dedicated Server;390;1.14.60;0;10;13253860892328930865;Bedrock level;Survival;1;19132;19133;"
+    server = RakPeer()
+    server.offline_ping_response = struct.pack(">H", len(message)) + message.encode("utf-8")
+    server.max_incoming_connections = 10
+    server.startup(port=port, max_connections=10)
+
+    client = RakPeer()
+    client.startup()
+    while True:
+        client.ping("127.0.0.1", port)
+        packet = client.receive()
+        if not packet:
+            continue
+        if packet.data[0] == MessageIdentifiers.ID_UNCONNECTED_PONG:
+            ping_time = struct.unpack(">I", packet.data[1:5])[0]
+            print(f"ID_UNCONNECTED_PONG from SystemAddress {packet.system_address}")
+            print(f"Time is {ping_time}")
+            print(f"Ping is {(raknet.time_ms() - ping_time)}ms")
+            print(f"Data is {len(packet.data[5:])} bytes long")
+            if len(packet.data[5:]) > 0:
+                print(f"Data is {packet.data[5:]}")
+
+            client.shutdown(0.1)
+            break
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Sample of sending pings using raknet-python")
+    parser.add_argument("--port", type=int, default=19132, help="The port to ping on the host.")
+    args = parser.parse_args()
+    main(args.port)