CODEWITHSUNDEEP
pythonstringhex
John Smith
John Smith

Reputation: 3

converting IP string to hex for dpkt.IP

I want to learn packet decoder processing using dpkt. On the site, I saw the following example code:

>>> from dpkt.ip import IP                            
>>> ip = IP(src='\x01\x02\x03\x04', dst='\x05\x06\x07\x08', p=1)
>>> ...

How do I convert an IP String like '1.2.3.4' to '\x01\x02\x03\x04'?

Upvotes: 0

Views: 2628

Answers (1)

falsetru
falsetru

Reputation: 369054

Use socket.inet_aton:

>>> import socket
>>> socket.inet_aton('1.2.3.4')
'\x01\x02\x03\x04'

To get the dotted decimal back, use socket.inet_ntoa:

>>> socket.inet_ntoa('\x01\x02\x03\x04')
'1.2.3.4'

UPDATE

In Python 3.3+, ipaddress.IPv4Address is another option.

>>> import ipaddress
>>> ipaddress.IPv4Address('1.2.3.4').packed
b'\x01\x02\x03\x04'
>>> ipaddress.IPv4Address(b'\x01\x02\x03\x04')
IPv4Address('1.2.3.4')
>>> str(ipaddress.IPv4Address(b'\x01\x02\x03\x04'))
'1.2.3.4'

Upvotes: 5

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