IP-host-reporter.py

#!/usr/bin/python
import os, socket, sys, time
socket.setdefaulttimeout(10) 
start = time.time()

subnets = ['140.107.42','140.107.43','140.107.88','140.107.89','140.107.134',\
          '140.107.135','140.107.52','140.107.53','140.107.152','140.107.153',\
          '140.107.170','140.107.171']

scanips = []; hosts = []; vhosts = []; free = []; vfree = []; reclaim = []; squatters = []

for subnet in subnets:
     for i in range(1,255):
         scanips.append('%s.%s' % (subnet, i))

print('Resolving hostnames...')
for host in scanips:
    try:
        h = socket.gethostbyaddr(host)
        name = h[0]
        ip = h[2][0]
        if not 'DHCP' in name: hosts.append((name,ip))
    except:
        free.append(host)

print('Checking if hosts are alive...')
for host in hosts:
    if '100% packet loss' in os.popen('ping -c 1 -W 1 %s' % host[1]).read():
        reclaim.append(host)
    else:
        vhosts.append(host)

print('Verifying free IPs and looking for squatters...') 
for ip in free:
    if '100% packet loss' in os.popen('ping -c 1 -W 1 %s' % ip).read():
        vfree.append(ip)
    else:
        squatters.append(ip)

stop = time.time()
et = stop - start

t = time.localtime()
ts = "%s-%02d-%02d_%02d.%02d" % (t[0], t[1], t[2], t[3], t[4])

print('Done!')
print('\nInterrogated %s IPs in %0.2f minutes (%0.2f IPs per second)' % (len(scanips), et / 60, len(scanips)/et)) 
print('+---------------------------------+')
print('| verified registered hosts: %-4s |' % len(vhosts))
print('| verified free IPs        : %-4s |' % len(vfree))
print('| stale registered hosts   : %-4s |' % len(reclaim))
print('| IP squatters             : %-4s |' % len(squatters))
print('+---------------------------------+\n')
print('see generated reports for details\n')


vh = open('verified-hosts-%s.csv' % ts, 'w')
for h in vhosts: vh.write('%s, %s\n' % h)
vh.close()

vf = open('verified-free-ips-%s.csv' % ts, 'w')
for f in vfree: vf.write('%s\n' % f)
vf.close()

st = open('stale-hosts-%s.csv' % ts, 'w')
for s in reclaim: st.write('%s, %s\n' % s)
st.close()

sq = open('ip-squatters-%s.csv' % ts, 'w')
for q in squatters: sq.write('%s\n' % q)
sq.close()