ipscan

#!/usr/bin/python3
try:
    import libnmap.process
    import libnmap.parser
    import tableprint
    import numpy
    import ipaddress
    from typing import List
except ModuleNotFoundError:
    print("Required modules not found. This program requires Python 3 and required dependicies installed. Run 'pip install python-libnmap tableprint numpy' to install dependicies and try again.")
    exit(1)

HOSTS_TO_SCAN = '192.168.1.0/24'
DNS_SERVER = '192.168.1.1'


def hasHostname(hostnames: List[str]) -> bool:
    return len(hostnames) != 0


def isValidIPAddress(IP_ADDR: str) -> bool:
    try:
        ipaddress.ip_address(IP_ADDR)
    except ValueError:
        return False
    return True


def removeDuplicatesFromList(array: List):
    b = list()
    [b.append(sublist) for sublist in array if sublist not in b]
    return b


def runNmapScan(nmapOptions: str, dnsServer: str):
    if DNS_SERVER is not None:
        if(isValidIPAddress(dnsServer) is True):
            nmapOptions += ' --dns-servers '
            nmapOptions += dnsServer
        else:
            raise TypeError("Invalid DNS server")

    nm = libnmap.process.NmapProcess(HOSTS_TO_SCAN, options=nmapOptions)
    rc = nm.run()
    nmap_report = libnmap.parser.NmapParser.parse(nm.stdout)
    return nmap_report


def Convert2DArrayToNumpyArray(arr: List):
    return numpy.array(arr)


def print2DArrayAsTable(
        arr: List[list],
        alignment: str,
        tableHeaders: List[str]):
    tableprint.table(Convert2DArrayToNumpyArray(arr),
                     tableHeaders, align=alignment)


hosts = []

print("Running standard ping scan...")
nmap_report = runNmapScan("-sn", DNS_SERVER)

for host in nmap_report.hosts:
    if hasHostname(host.hostnames):
        hosts.append([host.address, ' '.join(host.hostnames)])

print("Running deeper ping scan to find hidden devices...")
nmap_report = runNmapScan("-sn -Pn", DNS_SERVER)

for host in nmap_report.hosts:
    if hasHostname(host.hostnames):
        hosts.append([host.address, ' '.join(host.hostnames)])

hostsWithoutDuplicates = removeDuplicatesFromList(hosts)

print2DArrayAsTable(hostsWithoutDuplicates, 'left', ['IP Address', 'Hostname'])