problems python socket.error: [Errno 99] Cannot assign requested address

Question

I have problems i'cant run this script I tried creating an ICMP network sniffer as follows:

import socket
import os

host = '192.168.1.9'

if os.name == "nt":
   socket_protocol = socket.IPPROTO_IP
else:
   socket_protocol = socket.IPPROTO_ICMP
   sniffer = socket.socket(socket.AF_INET, socket.SOCK_RAW,socket_protocol)
   sniffer.bind((host, 0))   

   sniffer.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)

if os.name == "nt":

  sniffer.ioctl(socket.SIO_RCVALL, socket.RCVALL_ON)
  print sniffer.recvfrom(656565)

if os.name == "nt":

  sniffer.ioctl(socket.SIO_RCVALL, socket.RCVALL_OFF)



Traceback (most recent call last):
File "exampl.py", line 11, in <module>
sniffer.bind((host, 6000))
File "/usr/lib/python2.7/socket.py", line 228, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 99] Cannot assign requested address

What can I do to prevent this error?

Armali · Accepted Answer · 2019-01-16 10:51:15Z

1

socket.error: [Errno 99] Cannot assign requested address
What can I do to prevent this error?

The name of errno 99 is defined by

#define EADDRNOTAVAIL   99      /* Cannot assign requested address */

and man bind says:

   EADDRNOTAVAIL
          A  nonexistent  interface was requested or the requested address
          was not local.

This suggests trying with a local address, and indeed there's no more error with:

host = 'localhost'

answered Jan 16, 2019 at 10:51

Armali

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2 Comments

KansaiRobot Over a year ago

Why would he have to change the address to local host that is not the objective

Armali Over a year ago

You haven't recognized that the objective is to prevent this error.

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