get_aprz.py

import socket

f = open('/proc/net/arp', 'r')
data = f.readlines()
#print data
f.close()

def get_hostname(ip):
	try:
		return socket.gethostbyaddr(ip)[0]
	except socket.herror, e:
		#print ip, repr(e),
		return None

for line in data[1:]:
	ipaddr = line.split(" ")[0]
	mac = line.index(":")
	if mac < 0:
		print ipaddr, "unknown..."
		continue
		
	end_mac = line[mac:].index(" ") + mac
	hostname = get_hostname(ipaddr)
	print (hostname, ipaddr), line[mac-2: end_mac]