133 lines
4.0 KiB
Python
133 lines
4.0 KiB
Python
#!/usr/bin/env python3
|
|
#
|
|
# Copyright (c) 2022, The OpenThread Authors.
|
|
# All rights reserved.
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions are met:
|
|
# 1. Redistributions of source code must retain the above copyright
|
|
# notice, this list of conditions and the following disclaimer.
|
|
# 2. Redistributions in binary form must reproduce the above copyright
|
|
# notice, this list of conditions and the following disclaimer in the
|
|
# documentation and/or other materials provided with the distribution.
|
|
# 3. Neither the name of the copyright holder nor the
|
|
# names of its contributors may be used to endorse or promote products
|
|
# derived from this software without specific prior written permission.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
# POSSIBILITY OF SUCH DAMAGE.
|
|
#
|
|
|
|
import argparse
|
|
import logging
|
|
import signal
|
|
import time
|
|
import pcap_codec
|
|
import sys
|
|
import threading
|
|
|
|
import sniffer_transport
|
|
|
|
|
|
class Sniffer:
|
|
""" Class representing the Sniffing node, whose main task is listening.
|
|
"""
|
|
|
|
logger = logging.getLogger('sniffer.Sniffer')
|
|
|
|
RECV_BUFFER_SIZE = 4096
|
|
|
|
def __init__(self, filename, channel):
|
|
self._pcap = pcap_codec.PcapCodec(filename, channel)
|
|
|
|
# Create transport
|
|
transport_factory = sniffer_transport.SnifferTransportFactory()
|
|
self._transport = transport_factory.create_transport()
|
|
|
|
self._thread = None
|
|
self._thread_alive = threading.Event()
|
|
self._thread_alive.clear()
|
|
|
|
def _sniffer_main_loop(self):
|
|
""" Sniffer main loop. """
|
|
|
|
self.logger.debug('Sniffer started.')
|
|
|
|
while self._thread_alive.is_set():
|
|
data, nodeid = self._transport.recv(self.RECV_BUFFER_SIZE)
|
|
self._pcap.append(data)
|
|
|
|
self.logger.debug('Sniffer stopped.')
|
|
|
|
def start(self):
|
|
""" Start sniffing. """
|
|
|
|
self._thread = threading.Thread(target=self._sniffer_main_loop)
|
|
self._thread.daemon = True
|
|
|
|
self._transport.open()
|
|
|
|
self._thread_alive.set()
|
|
self._thread.start()
|
|
|
|
def stop(self):
|
|
""" Stop sniffing. """
|
|
|
|
self._thread_alive.clear()
|
|
|
|
self._transport.close()
|
|
|
|
self._thread.join(timeout=1)
|
|
self._thread = None
|
|
|
|
def close(self):
|
|
""" Close the pcap file. """
|
|
|
|
self._pcap.close()
|
|
|
|
|
|
def run_sniffer():
|
|
parser = argparse.ArgumentParser()
|
|
parser.add_argument('-o',
|
|
'--output',
|
|
dest='output',
|
|
type=str,
|
|
required=True,
|
|
help='the path of the output .pcap file')
|
|
parser.add_argument('-c',
|
|
'--channel',
|
|
dest='channel',
|
|
type=int,
|
|
required=True,
|
|
help='the channel which is sniffered')
|
|
args = parser.parse_args()
|
|
|
|
sniffer = Sniffer(args.output, args.channel)
|
|
sniffer.start()
|
|
|
|
def atexit(signum, frame):
|
|
sniffer.stop()
|
|
sniffer.close()
|
|
sys.exit(0)
|
|
|
|
signal.signal(signal.SIGTERM, atexit)
|
|
|
|
while sniffer._thread_alive.is_set():
|
|
time.sleep(0.5)
|
|
|
|
sniffer.stop()
|
|
sniffer.close()
|
|
|
|
|
|
if __name__ == '__main__':
|
|
run_sniffer()
|