UDP Broadcast Networking Program with Python

I have written a small Python program that needs to continuously listen on port 2237.

The packets are received from one program, which I will call P1. There is also another program, P2, that receives commands from P1. Both P1 and P2 use port 2237.

My problem is that when I start my Python script, it successfully receives data from P1, but it fails to receive data from P2. The functionality only works again after I stop my program.

The Python script for receiving the packets is:

def run(udp_port: int): logger.info("Starting listener on port %d", udp_port) client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP) client.setsockopt()

client.bind(("", udp_port))
while True:
    data, addr = client.recvfrom(4096)
    src_ip, src_port = addr

    logger.debug("Received %d bytes from %s:%d", len(data), src_ip, src_port)
    hexdump(data, logging.DEBUG)

    try:
        payload = parse_message(data)
        if payload is not None:
            logger.info("%r", payload)
    except Exception as e:
        logger.error("Failed to parse header: %s", e)

What could be causing this conflict? Is there a known issue where an active UDP listener process interferes with two other applications (P1 and P2) communicating on the same port? Any ideas or suggested workarounds would be helpful!