Monat: November 2018

You got the task to generate a list of IP-Networks connected to LAN „VirtualBox Host-Only Network“. There might be more than one IP-Network.

Use Scapy to crawl through all Interfaces and get the human-readable interface name [only required for windows users]. Use NetIfaces to get a list of IP-Addresses connected to this interface. Use IPAddress to calculate the IP-Network(s) directly connected.

! multiple IPs per Interface supporte
!
from netifaces import AF_INET, AF_INET6, AF_LINK
import netifaces

from scapy.all import *

import ipaddress


if_name = "VirtualBox Host-Only Network"
if_id = ""
if_inet = []

for i in ifaces.data.keys():
  iface = ifaces.data[i]
  wname = iface.data['netid']
  if wname == if_name:
    if_id = i
    addresses = netifaces.ifaddresses(i)
    if AF_INET in addresses:
      for addr in netifaces.ifaddresses(i)[AF_INET]:
        print(addr)
        ipaddr = ipaddress.ip_interface(addr["addr"]+"/"+addr["netmask"])
        ipnetwork = ipaddr.network
        print(ipaddr,ipnetwork)
        if_inet.append(ipnetwork)

print("NAME: {0}\nIP: {1}\nID: {2}".format(if_name,if_inet,if_id))

In my case, only one subnet is directly connected:

• 192.168.56.0/24

...
{'addr': '192.168.56.1', 'netmask': '255.255.255.0', 'broadcast': '192.168.56.255'}
192.168.56.1/24 192.168.56.0/24
>>> print("NAME: {0}\nIP: {1}\nID: {2}".format(if_name,if_inet,if_id))
NAME: VirtualBox Host-Only Network
IP: [IPv4Network('192.168.56.0/24')]
ID: {D30DEC05-D495-4DA1-81F1-42B07885B0EB}
>>>

Using Windows:

• scapy reads:
  • meaningful interface-names
  • ip-address
  • but no netmask
• netifaces reads:
  • full Ethernet/IP/IPv6-Information
  • but no meaningful interface-names

Mixing both, provides everything needed.

1. Netifaces only

from netifaces import AF_INET, AF_INET6, AF_LINK
import netifaces

for i in netifaces.interfaces():
   niif=netifaces.ifaddresses(i)
   print("i",i)
   for k,v in niif.items():
     print("Key",k)
     if k==AF_LINK:
       print("LINK:",v)
     if k==AF_INET:
       print("IPv4",v)
     if k==AF_INET6:
       print("IPv6",v)
   print()

>>> for i in netifaces.interfaces():
...    niif=netifaces.ifaddresses(i)
...    print("i",i)
...    for k,v in niif.items():
...      print("Key",k)
...      if k==AF_LINK:
...        print("LINK:",v)
...      if k==AF_INET:
...        print("IPv4",v)
...      if k==AF_INET6:
...        print("IPv6",v)
...    print()
...
i {07E9D8A4-E167-4FFF-B851-61A20C49AE6E}
Key -1000
LINK: [{'addr': '00:00:81:00:de:11'}]
Key 23
IPv6 [{'addr': 'fe80::8400:abb0:2a62:a173%4', 'netmask': 'ffff:ffff:ffff:ffff::/64', 'broadcast': 'fe80::ffff:ffff:ffff:ffff%4'}]

i {D30DEC05-D495-4DA1-81F1-42B07885B0EB}
Key -1000
LINK: [{'addr': '0a:00:27:00:00:14'}]
Key 23
IPv6 [{'addr': 'fe80::1e0:4a4:8afc:90f7%20', 'netmask': 'ffff:ffff:ffff:ffff::/64', 'broadcast': 'fe80::ffff:ffff:ffff:ffff%20'}]
Key 2
IPv4 [{'addr': '192.168.56.1', 'netmask': '255.255.255.0', 'broadcast': '192.168.56.255'}]

i {402C453F-4B74-4883-9257-BD31FAB7AB57}
Key -1000
LINK: [{'addr': '74:70:fd:bd:10:38'}]
Key 23
IPv6 [{'addr': 'fe80::2599:368f:e80d:94b6%8', 'netmask': 'ffff:ffff:ffff:ffff::/64', 'broadcast': 'fe80::ffff:ffff:ffff:ffff%8'}]

i {2120C2CA-E7D4-45DF-8090-A8D7F48EFF42}
Key -1000
LINK: [{'addr': '76:70:fd:bd:10:37'}]
Key 23
IPv6 [{'addr': 'fe80::34d6:9683:4af5:afad%6', 'netmask': 'ffff:ffff:ffff:ffff::/64', 'broadcast': 'fe80::ffff:ffff:ffff:ffff%6'}]

i {F931F123-70A4-4CFB-BD9C-C0A509080286}
Key -1000
LINK: [{'addr': '74:70:fd:bd:10:37'}]
Key 23
IPv6 [{'addr': 'fe80::1926:3c29:1b34:e1f6%22', 'netmask': 'ffff:ffff:ffff:ffff::/64', 'broadcast': 'fe80::ffff:ffff:ffff:ffff%22'}]
Key 2
IPv4 [{'addr': '192.168.1.163', 'netmask': '255.255.255.0', 'broadcast': '192.168.1.255'}]

i {693A5869-6A31-11E8-85D1-806E6F6E6963}
Key -1000
LINK: [{'addr': ''}]
Key 23
IPv6 [{'addr': '::1', 'netmask': 'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/128', 'broadcast': '::1'}]
Key 2
IPv4 [{'addr': '127.0.0.1', 'netmask': '255.0.0.0', 'broadcast': '127.255.255.255'}]

2. Adding Scapy to get meaningful interface names

from scapy.all import *

for i in ifaces.data.keys():
  print(i)
  iface = ifaces.data[i]
  wname = iface.data['netid']
  addresses = netifaces.ifaddresses(i)
  af_inet = [{"addr": "0.0.0.0", "netmask": "0.0.0.0", "broadcast": "0.0.0.0"}]
  if AF_INET in addresses:
    af_inet = netifaces.ifaddresses(i)[AF_INET]
  print(wname,af_inet)

>>> for i in ifaces.data.keys():
...   print(i)
...   iface = ifaces.data[i]
...   wname = iface.data['netid']
...   addresses = netifaces.ifaddresses(i)
...   af_inet = [{"addr": "0.0.0.0", "netmask": "0.0.0.0", "broadcast": "0.0.0.0"}]
...   if AF_INET in addresses:
...     af_inet = netifaces.ifaddresses(i)[AF_INET]
...   print(wname,af_inet)
...
{F931F123-70A4-4CFB-BD9C-C0A509080286}
Wi-Fi [{'addr': '192.168.1.163', 'netmask': '255.255.255.0', 'broadcast': '192.168.1.255'}]
{D30DEC05-D495-4DA1-81F1-42B07885B0EB}
VirtualBox Host-Only Network [{'addr': '192.168.56.1', 'netmask': '255.255.255.0', 'broadcast': '192.168.56.255'}]
{07E9D8A4-E167-4FFF-B851-61A20C49AE6E}
ETH_DELL [{'addr': '0.0.0.0', 'netmask': '0.0.0.0', 'broadcast': '0.0.0.0'}]