diff options
Diffstat (limited to 'doc/extcap_example.py')
| -rwxr-xr-x | doc/extcap_example.py | 55 |
1 files changed, 41 insertions, 14 deletions
diff --git a/doc/extcap_example.py b/doc/extcap_example.py index 669b41ef50..e7af44b4d5 100755 --- a/doc/extcap_example.py +++ b/doc/extcap_example.py @@ -1,4 +1,4 @@ -#!/usr/bin/env python +#!/usr/bin/env python3 # Copyright 2014 Roland Knall <rknall [AT] gmail.com> # @@ -9,7 +9,7 @@ # SPDX-License-Identifier: GPL-2.0-or-later # -""" +r""" This is a generic example, which produces pcap packages every n seconds, and is configurable via extcap options. @@ -20,7 +20,7 @@ the extcap folder, with the following content: ------- @echo off -<Path to python interpreter> <Path to script file> %* +C:\Windows\py.exe C:\Path\to\extcap_example.py %* ------- Windows is not able to execute Python scripts directly, which also goes for all @@ -36,6 +36,7 @@ import re import argparse import time import struct +import array from threading import Thread ERROR_USAGE = 0 @@ -78,7 +79,7 @@ class ArgumentParser(argparse.ArgumentParser): def _get_action_from_name(self, name): """Given a name, get the Action instance registered with this parser. If only it were made available in the ArgumentError object. It is - passed as it's first arg... + passed as its first arg... """ container = self._actions if name is None: @@ -238,8 +239,10 @@ def ip_checksum(iph): csum = csum & 0xFFFF ^ 0xFFFF return csum -def pcap_fake_package(message, fake_ip): +iterateCounter = 0 +def pcap_fake_package(message, fake_ip): + global iterateCounter pcap = bytearray() #length = 14 bytes [ eth ] + 20 bytes [ ip ] + messagelength @@ -252,13 +255,21 @@ def pcap_fake_package(message, fake_ip): pcap += struct.pack('<L', unsigned(caplength)) # length in frame # ETH - pcap += struct.pack('h', 0) # source mac - pcap += struct.pack('h', 0) # source mac - pcap += struct.pack('h', 0) # source mac - pcap += struct.pack('h', 0) # dest mac - pcap += struct.pack('h', 0) # dest mac - pcap += struct.pack('h', 0) # dest mac + destValue = '2900' + srcValue = '3400' + if (iterateCounter % 2 == 0): + x = srcValue + srcValue = destValue + destValue = x + + pcap += struct.pack('h', int(destValue, 16)) # dest mac + pcap += struct.pack('h', int(destValue, 16)) # dest mac + pcap += struct.pack('h', int(destValue, 16)) # dest mac + pcap += struct.pack('h', int(srcValue, 16)) # source mac + pcap += struct.pack('h', int(srcValue, 16)) # source mac + pcap += struct.pack('h', int(srcValue, 16)) # source mac pcap += struct.pack('<h', unsigned(8)) # protocol (ip) + iterateCounter += 1 # IP pcap += struct.pack('b', int('45', 16)) # IP version @@ -277,6 +288,7 @@ def pcap_fake_package(message, fake_ip): pcap += struct.pack('>L', int('7F000001', 16)) # Dest IP pcap += message + return pcap def control_read(fn): @@ -361,6 +373,13 @@ def extcap_capture(interface, fifo, control_in, control_out, in_delay, in_verify counter = 1 fn_out = None + data = """Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor + incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nost + rud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis + aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugi + at nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culp + a qui officia deserunt mollit anim id est laborum. """ + with open(fifo, 'wb', 0) as fh: fh.write(pcap_fake_header()) @@ -376,6 +395,9 @@ def extcap_capture(interface, fifo, control_in, control_out, in_delay, in_verify if fn_out is not None: control_write_defaults(fn_out) + dataPackage = int(0) + dataTotal = int(len(data) / 20) + 1 + while True: if fn_out is not None: log = "Received packet #" + str(counter) + "\n" @@ -387,7 +409,12 @@ def extcap_capture(interface, fifo, control_in, control_out, in_delay, in_verify control_write(fn_out, CTRL_ARG_NONE, CTRL_CMD_INFORMATION, "Turn action finished.") button_disabled = False - out = ("%s|%04X%s|%s" % (remote.strip(), len(message), message, verify)).encode("utf8") + if (dataPackage * 20 > len(data)): + dataPackage = 0 + dataSub = data[dataPackage * 20:(dataPackage + 1) * 20] + dataPackage += 1 + + out = ("%c%s%c%c%c%s%c%s%c" % (len(remote), remote.strip(), dataPackage, dataTotal, len(dataSub), dataSub.strip(), len(message), message.strip(), verify)).encode("utf8") fh.write(pcap_fake_package(out, fake_ip)) time.sleep(delay) @@ -418,7 +445,7 @@ if __name__ == '__main__': parser = ArgumentParser( prog="Extcap Example", - description="Extcap example program for python" + description="Extcap example program for Python" ) # Extcap Arguments @@ -477,7 +504,7 @@ if __name__ == '__main__': if len(unknown) > 1: print("Extcap Example %d unknown arguments given" % len(unknown)) - m = re.match('example(\d+)', args.extcap_interface) + m = re.match(r'example(\d+)', args.extcap_interface) if not m: sys.exit(ERROR_INTERFACE) interface = m.group(1) |