import socket
import time

TARGET_SUBNETS = ["202.114.4.255", "255.255.255.255"]
PORTS = [511, 1000, 2000, 5000, 8000, 8300, 9000, 10008, 12345]

# Common Contec discovery payloads
PAYLOADS = [
    b"CMS",
    b"CMS_SEARCH",
    b"CMS_REGISTER",
    b"CMS_HEARTBEAT",
    b"\x55\xaa\x01\x00\x01",  # sync header + command
    b"\xaa\x55\x01\x00\x01",
    b"\x00\x00\x00\x00",
    b"\x01"
]

print("Sending UDP discovery heartbeats to trigger the monitor...")

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)

for subnet in TARGET_SUBNETS:
    for port in PORTS:
        for payload in PAYLOADS:
            try:
                # Send broadcast packet
                s.sendto(payload, (subnet, port))
                print(f"Sent {len(payload)} bytes to {subnet}:{port}")
            except Exception as e:
                pass
            time.sleep(0.01)

s.close()
print("Discovery heartbeats sent successfully.")