I am trying to build a Networkscanner that scans my localnetwork. Here is how I would do it:
- Create an ARP Request.
- Create an Ethernet Frame.
- Place the ARP Request inside the Ethernet Frame.
- Send the combined frame and receive responses.
- Then parse the responses and print the results.
Here is my code so far:
#!/usr/bin/env python3
import scapy.all as scapy
IP = 'here i would enter my IP adress'
def scan(ip):
arp_packet = scapy.ARP(pdst=ip)
broadcast_packet = scapy.Ether(dst='ff:ff:ff:ff:ff:ff')
arp_broadcast_packet = broadcast_packet/arp_packet
scapy.srp(arp_broadcast_packet, timeout = 1, verbose = False)
scan(IP)
However I am getting the error message :
AttributeError: 'L2bpfSocket' object has no attribute 'ins'
Here is the complete message:
Traceback (most recent call last):
File "/Users/Uni/Dropbox/Mein Mac (Elias MacBook Pro)/Desktop/wifi2.py", line 12, in <module>
scan(IP)
File "/Users/Uni/Dropbox/Mein Mac (Elias MacBook Pro)/Desktop/wifi2.py", line 10, in scan
scapy.srp(arp_broadcast_packet, timeout = 1, verbose = False)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/scapy/sendrecv.py", line 552, in srp
s = conf.L2socket(promisc=promisc, iface=iface,
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/scapy/arch/bpf/supersocket.py", line 242, in __init__
super(L2bpfListenSocket, self).__init__(*args, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/scapy/arch/bpf/supersocket.py", line 62, in __init__
(self.ins, self.dev_bpf) = get_dev_bpf()
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/scapy/arch/bpf/core.py", line 114, in get_dev_bpf
raise Scapy_Exception("No /dev/bpf handle is available !")
scapy.error.Scapy_Exception: No /dev/bpf handle is available !
Exception ignored in: <function _L2bpfSocket.__del__ at 0x7fc3220493a0>
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/scapy/arch/bpf/supersocket.py", line 139, in __del__
self.close()
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/scapy/arch/bpf/supersocket.py", line 211, in close
if not self.closed and self.ins is not None:
AttributeError: 'L2bpfSocket' object has no attribute 'ins'
Elias-MBP:~ Uni$
I read that it could be do to the program trying to close a L2bpfSocket that couldn't be created, therefore not having a Attribute ins.
However I have no clue how to fix this, or why the L2bpfSocket couldn't be created in the first place.
