feat: UDP broadcast test

connection.py

@@ -0,0 +1,57 @@
+import socket
+import argparse
+import threading
+import random
+import time
+
+def handle_client(conn):
+    while True:
+        try:
+            num = random.randint(0, 100)
+            conn.send(f"number={num}".encode())
+            time.sleep(1)
+        except:
+            print("Disconnected.")
+            conn.close()
+            break
+        
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument('type', type=str, help="'client' or 'server'", default='server')
+    parser.add_argument('--host', type=str, help="server's IPv4 address", default='0.0.0.0')
+    parser.add_argument('--port', type=int, help="server's listening port", default=8888)
+
+    args = parser.parse_args()
+    socket_type = args.type
+    host, port = args.host, args.port
+
+    if socket_type == 'server':
+        sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        sock.bind((host, port))
+
+        print("Server listening...")
+
+        while True:
+            data, addr = sock.recvfrom(1024)
+            print(f"Accept connection from {addr}")
+
+            sock.sendto(host.encode(), addr)
+            
+            # thread = threading.Thread(target=handle_client, args=(conn, ))
+            # thread.start()
+            
+    else:
+        sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
+        sock.settimeout(2)
+
+        sock.sendto('discover'.encode(), ('255.255.255.255', port))
+
+        while True:
+            data, addr = sock.recvfrom(1024)
+            print(data.decode(), addr)
+
+        
+
+