Python Penetration Testing Essentials - Second Edition

Socket exceptions

In order to handle exceptions, we'll use the try and except blocks. The following example will tell you how to handle the exceptions. Run udptime2.py:

import socket
host = "192.168.0.1"
port = 12346
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
  
  s.bind((host,port))
  s.settimeout(5)
  data, addr = s.recvfrom(1024)
  print "recevied from ",addr
  print "obtained ", data
  s.close()
  
except socket.timeout :
  print "Client not connected"
  s.close()

The output is shown in the following screenshot:

In the try block, I put my code, and from the except block, a customized message is printed if any exception occurs.

Different types ...