104 lines
3.8 KiB
Python
104 lines
3.8 KiB
Python
import logging
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import time
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from common.network.range import *
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from config import WormConfiguration
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from info import local_ips, get_interfaces_ranges
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from model import VictimHost
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from . import HostScanner
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__author__ = 'itamar'
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LOG = logging.getLogger(__name__)
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SCAN_DELAY = 0
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class NetworkScanner(object):
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def __init__(self):
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self._ip_addresses = None
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self._ranges = None
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def initialize(self):
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"""
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Set up scanning.
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based on configuration: scans local network and/or scans fixed list of IPs/subnets.
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:return:
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"""
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# get local ip addresses
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self._ip_addresses = local_ips()
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if not self._ip_addresses:
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raise Exception("Cannot find local IP address for the machine")
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LOG.info("Found local IP addresses of the machine: %r", self._ip_addresses)
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# for fixed range, only scan once.
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self._ranges = [NetworkRange.get_range_obj(address_str=x) for x in WormConfiguration.subnet_scan_list]
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if WormConfiguration.local_network_scan:
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self._ranges += get_interfaces_ranges()
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self._ranges += self._get_inaccessible_subnets_ips()
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LOG.info("Base local networks to scan are: %r", self._ranges)
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def _get_inaccessible_subnets_ips(self):
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subnets_to_scan = []
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for subnet_group in WormConfiguration.inaccessible_subnet_groups:
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for subnet_str in subnet_group:
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if NetworkScanner._is_any_ip_in_subnet([unicode(x) for x in self._ip_addresses], subnet_str):
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# If machine has IPs from 2 different subnets in the same group, there's no point checking the other
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# subnet.
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for other_subnet_str in subnet_group:
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if other_subnet_str == subnet_str:
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continue
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if not NetworkScanner._is_any_ip_in_subnet([unicode(x) for x in self._ip_addresses],
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other_subnet_str):
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subnets_to_scan.append(NetworkRange.get_range_obj(other_subnet_str))
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break
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return subnets_to_scan
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def get_victim_machines(self, scan_type, max_find=5, stop_callback=None):
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assert issubclass(scan_type, HostScanner)
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scanner = scan_type()
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victims_count = 0
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for net_range in self._ranges:
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LOG.debug("Scanning for potential victims in the network %r", net_range)
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for ip_addr in net_range:
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victim = VictimHost(ip_addr)
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if stop_callback and stop_callback():
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LOG.debug("Got stop signal")
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break
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# skip self IP address
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if victim.ip_addr in self._ip_addresses:
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continue
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# skip IPs marked as blocked
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if victim.ip_addr in WormConfiguration.blocked_ips:
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LOG.info("Skipping %s due to blacklist" % victim)
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continue
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LOG.debug("Scanning %r...", victim)
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# if scanner detect machine is up, add it to victims list
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if scanner.is_host_alive(victim):
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LOG.debug("Found potential victim: %r", victim)
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victims_count += 1
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yield victim
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if victims_count >= max_find:
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LOG.debug("Found max needed victims (%d), stopping scan", max_find)
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break
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if SCAN_DELAY:
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time.sleep(SCAN_DELAY)
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@staticmethod
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def _is_any_ip_in_subnet(ip_addresses, subnet_str):
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for ip_address in ip_addresses:
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if NetworkRange.get_range_obj(subnet_str).is_in_range(ip_address):
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return True
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return False
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