31 lines
785 B
Python
31 lines
785 B
Python
import logging
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import pcapy
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import struct
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interface = 'wlan0'
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target = './dhcp-cap'
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logger = logging.getLogger()
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logger.setLevel(logging.DEBUG)
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logger.addHandler(logging.StreamHandler())
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def hwaddr_ascii(packet):
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# picking up MAC directly from ethernet frame
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return ':'.join('%02x' % ord(c) for c in packet[6:12])
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def capture_dhcp(itf):
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f = open(target, 'w')
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reader = pcapy.open_live(itf, 4096, False, 5000)
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reader.setfilter('udp dst port 67')
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def callback(header, packet):
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hwaddr = hwaddr_ascii(packet)
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logger.info('Captured dhcp request from %s', hwaddr)
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f.write(hwaddr + '\n')
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f.flush()
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try:
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while True:
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reader.dispatch(1, callback)
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except KeyboardInterrupt:
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pass
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capture_dhcp('wlan0')
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