def start_capture(self,
override_configs=None,
additional_args=None,
duration=None,
packet_count=None):
"""See base class documentation
"""
if self._process is not None:
raise sniffer.InvalidOperationError(
"Trying to start a sniff while another is still running!")
capture_dir = os.path.join(self._logger.log_path,
"Sniffer-{}".format(self._interface))
os.makedirs(capture_dir, exist_ok=True)
self._capture_file_path = os.path.join(
capture_dir,
"capture_{}.pcap".format(logger.get_log_file_timestamp()))
self._pre_capture_config(override_configs)
_, self._temp_capture_file_path = tempfile.mkstemp(suffix=".pcap")
cmd = self._get_command_line(additional_args=additional_args,
duration=duration,
packet_count=packet_count)
self._process = utils.start_standing_subprocess(cmd)
return sniffer.ActiveCaptureContext(self, duration)
def stop_capture(self):
"""See base class documentation
"""
if self._process is None:
raise sniffer.InvalidOperationError(
"Trying to stop a non-started process")
utils.stop_standing_subprocess(self._process)
self._post_process()
def wait_for_capture(self, timeout=None):
"""See base class documentation
"""
if self._process is None:
raise sniffer.InvalidOperationError(
"Trying to wait on a non-started process")
try:
utils.wait_for_standing_subprocess(self._process, timeout)
self._post_process()
except subprocess.TimeoutExpired:
self.stop_capture()