Awk script for device discovery

gistfile1.awk

#
# Class C device discovery in under 5 seconds.
# Notice that it will display information on any MAC address that nmap knows about. It's helpful to keep this updated. 
# You can also add any MAC address OIDs that are newer or unknown to the file /usr/share/nmap/nmap-mac-prefixes.
# 
# How to call this script:
# nmap -n -sP --excludefile $PROJECT_ROOT/output/known.skip 10.10.100-103.1-255 | awk -f $PROJECT_ROOT/mac-sort.awk
#

BEGIN {	PROJECT_PATH="/path/to/scripts"; }

/Nmap scan report for/  	{ip_address = $5}
/MAC Address/			{if ($4 ~ /Linksys/) 		linksys_ips = linksys_ips "\n" ip_address;
                                 else if ($4 ~ /Polycom/) 	polycom_ips = polycom_ips "\n" ip_address;
                                 else if ($4 ~ /Wyse/) 		wyse_ips = wyse_ips "\n" ip_address;
                                 else if ($4 ~ /Cisco/) 	cisco_ips = cisco_ips "\n" ip_address;
                                 else if ($4 ~ /Apple/) 	apple_ips = apple_ips "\n" ip_address;
                                 else if ($4 ~ /Linux/) 	kvm_ips = kvm_ips "\n" ip_address;
                                 else if ($4 ~ /Unknown/) 	unknown_ips = unknown_ips "\n" ip_address;
                                 else 				discovered_ips = discovered_ips "\n" ip_address; 
				}
END {	print linksys_ips > PROJECT_PATH"/output/linksys.skip";
	print polycom_ips > PROJECT_PATH"/output/polycom.skip";
	print wyse_ips > PROJECT_PATH"/output/wyse.skip";
	print cisco_ips > PROJECT_PATH"/output/cisco.skip";
	print apple_ips > PROJECT_PATH"/output/apple.info";
	print kvm_ips > PROJECT_PATH"/output/kvm.info";
        print unknown_ips > PROJECT_PATH"/output/unknown.info";
	print discovered_ips > PROJECT_PATH"/output/discovered.info" }

Courtesy of Thomas Heffron!