A wrapper for nmap to search a range of ip ranges and report on the new hosts found

newhostsscan.py

import nmap
import sys
from time import sleep

HOSTS= "192.168.1.1-255"

class ansicolors:
    HEADER = '\033[95m'
    OKBLUE = '\033[94m'
    OKGREEN = '\033[92m'
    WARNING = '\033[93m'
    FAIL = '\033[91m'
    ENDC = '\033[0m'

def ansi_ins(string):
    return ansicolors.OKGREEN + string + ansicolors.ENDC

def scannew(oldhosts):
    nm.scan(hosts=HOSTS, arguments="-sn")
    newhosts = [nm[x]['hostname'] for x in nm.all_hosts()]
    return list(set(newhosts) - set(oldhosts))

if __name__ == "__main__":
    
    nm = nmap.PortScanner()
    hostlist = []
    while True:
        try:
            newhosts = scannew(hostlist)
            if newhosts != []:
                hostlist += newhosts
                print(ansi_ins("\nfound new hosts:\n"))
                for i in newhosts:
                    print(i)
            sleep(60)
        except KeyboardInterrupt:
            print(ansi_ins("\nDumping list of hosts to file..."))
            hostdump = file("testsweep_dump", "w")
            count = 0
            for i in hostlist:
                if i != '':
                    hostdump.write(i + '\n')
                    count += 1
            print(ansi_ins("Finished writing {} hosts to file!").format(count))
            sys.exit(0)