example: add socket scripts again

examples/protocols/sockets/scripts/run_udp_client.py

@@ -0,0 +1,52 @@
+# SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Unlicense OR CC0-1.0
+import argparse
+import os
+import socket
+
+DEF_PORT = 3333
+DEF_MESSAGE = 'Data to ESP'
+
+
+def udp_client(address: str, port: int, payload: str) -> str:
+    for res in socket.getaddrinfo(address, port, socket.AF_UNSPEC,
+                                  socket.SOCK_DGRAM, 0, socket.AI_PASSIVE):
+        family_addr, _, _, _, addr = res
+    try:
+        sock = socket.socket(family_addr, socket.SOCK_DGRAM)
+        sock.settimeout(20.0)
+    except socket.error as msg:
+        print('Could not create socket')
+        print(os.strerror(msg.errno))
+        raise
+    try:
+        sock.sendto(payload.encode(), addr)
+        reply, addr = sock.recvfrom(128)
+        if not reply:
+            return ''
+        print('Reply[' + addr[0] + ':' + str(addr[1]) + '] - ' + str(reply))
+    except socket.timeout:
+        print('Socket operation timeout')
+        return ''
+    except socket.error as msg:
+        print('Error while sending or receiving data from the socket')
+        print(os.strerror(msg.errno))
+        sock.close()
+        raise
+    return reply.decode()
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser()
+    parser.add_argument('remote_ip', help='UDP server ip address, eg: 192.168.1.1, fe80::2%%eth0')
+    parser.add_argument('--port', default=DEF_PORT, type=int, help='UDP server port')
+    parser.add_argument('--message', default=DEF_MESSAGE, help='Message to send to the server.')
+    args = parser.parse_args()
+
+    print(f'Send message to the server: {args.remote_ip}')
+    data = udp_client(args.remote_ip, args.port, args.message)
+    print(f'Received From server: {data}')
+
+
+if __name__ == '__main__':
+    main()