Thursday, April 24, 2014

Python Raw Socket to Create ICMP Packet

Had a challenge to recreate a raw packet from bytes given in a text file.  Used python to create the raw socket.  The commented code is taking it from text to hex.

#!/usr/bin/env python

import socket
import struct

rawSocket = socket.socket(socket.PF_PACKET, socket.SOCK_RAW, socket.htons(0x800))
rawSocket.bind(("vmnet1", socket.htons(0x0800)))

#hexBytes = "000c29213dd1005056c00001080045000054b40a00004001905c0a0a112d0a0a11020000364e16070001c3190152013b030008090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f3031323334353637"

#counter = 1
#for letter in hexBytes:
# if counter == 1:
# firstLetter = letter
# counter = 2
# elif counter == 2:
# print "\\x" + firstLetter + letter
# counter = 1

hexPacket = "\x00\x0c\x29\x21\x3d\xd1\x00\x50\x56\xc0\x00\x01\x08\x00\x45\x00\x00\x54\xb4\x0a\x00\x00\x40\x01\x90\x5c\x0a\x0a\x11\x2d\x0a\x0a\x11\x02\x00\x00\x36\x4e\x16\x07\x00\x01\xc3\x19\x01\x52\x01\x3b\x03\x00\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20\x21\x22\x23\x24\x25\x26\x27\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f\x30\x31\x32\x33\x34\x35\x36\x37"


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