import asyncio
from datetime import datetime, timedelta

async def proxy(reader, writer):
    message = await reader.read(1024)
    addr = writer.get_extra_info('peername')

    try:
        print('Recvd from {}: {}'.format(addr[0], message))
        offset = 32
        date_time_obj = datetime.strptime(str(message)[offset:offset+14], '%Y%m%d%H%M%S') + timedelta(minutes=-5)
        send_str = '101' + datetime.strftime(date_time_obj, '%Y%m%d%H%M%S')
        send_data = send_str.encode()
        print('Sending to {}: {}'.format(addr[0], send_data))
        writer.write(send_data)
        await writer.drain()
    except ValueError:
        print('Ignored unnecessary data')

    writer.close()

async def main():
    for port in [8995, 8996, 8997]:
        server = await asyncio.start_server(proxy, '192.168.69.69', port)
        task = asyncio.create_task(server.serve_forever())

    # block here for now
    await task

asyncio.run(main())