Capture_Packets

from struct import pack
import time
class PCAPFile:
    def __init__(self, filename):
        self.fp = open(filename, 'wb')
        header = pack('!IHHiIII', 0xa1b2c3d4, 2, 4, 0, 0, 65535, 0)
        print(header)
        self.fp.write(header)

    def write(self, data):
        seconds, mseconds = (int(part) for part in str(time.time()).split('.'))
        length = len(data)
        message = pack('!IIII', seconds, mseconds, length, length)
        self.fp.write(message)
        self.fp.write(data)

    def close(self):
        self.fp.close()