January 2019
Beginner to intermediate
776 pages
19h 58m
English
book
Python Network Programming
by Abhishek Ratan, Eric Chou, Pradeeban Kathiravelu, Dr. M. O. Faruque Sarker
Content preview from Python Network Programming
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How it works...
The preceding script first takes a list of network hosts, scan_hosts, from the command line. It then creates a schedule to launch the detect_inactive_hosts() function after a one-second delay. The target function takes the scan_hosts argument and calls Scapy library's sr() function.
This function schedules itself to rerun after every 10 seconds by calling the schedule.enter() function once again. This way, we run this scanning task periodically.
The Scapy library's sr() scanning function takes an IP, protocol, and some scan-control information. In this case, the IP() method passes scan_hosts as the destination hosts to scan, and the protocol is specified as ICMP. This can also be TCP or UDP. We do not specify a retry and ...
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