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BlueSkyDetector/dhcp_detector.py

Created April 10, 2011 13:40
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detect number of DHCP server
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dhcp_detector.py
#!/bin/env python
from scapy.all import *
conf.checkIPaddr = False
fam,hw = get_if_raw_hwaddr(conf.iface)
dhcp_discover = Ether(dst="ff:ff:ff:ff:ff:ff")/IP(src="0.0.0.0",dst="255.255.255.255")/UDP(sport=68,dport=67)/BOOTP(chaddr=hw)/DHCP(options=[("message-type","discover"),"end"])
ans, unans = srp(dhcp_discover, iface='eth0', multi=True, timeout=2, verbose=0)
print len(ans)
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