Bug #8538 » update_ethercodes_v2.sh
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#!/bin/bash
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# update_ethercodes.sh
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# This script downloads the currect mac address data from the IEEE and parses it for nmap and arpwatch.
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# nmap-mac-prefixes is for nmap.
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# ethercodes.dat is arpwatch.
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# Download the current data
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wget http://standards.ieee.org/regauth/oui/oui.txt |
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# Divide the data into Manufacturer and Address files
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cat oui.txt | grep '(base 16)' | cut -f3 > mac.manufacturer |
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#old nmap format
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#cat oui.txt | grep '(base 16)' | cut -f1 -d' ' > mac.address
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#new nmap format
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cat oui.txt | grep '(base 16)' | cut -f3 -d' ' > mac.address |
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# Paste them back together for nmap data
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paste mac.address mac.manufacturer > nmap-mac-prefixes |
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# Parse the address data for arpwatch
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cat mac.address | perl -pe 's/^(([^0].)|0(.))(([^0].)|0(.))(([^0].)|0(.))/\2\3:\5\6:\8\9/' > tmp.address |
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cat tmp.address | tr [A-Z] [a-z] > mac.address |
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# Paste the parsed data into the arpwatch file
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paste mac.address mac.manufacturer > ethercodes.dat |
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# Clean up intermediary files
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rm tmp.address
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rm mac.address
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rm mac.manufacturer
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rm oui.txt
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