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#!/router/bin/python
import os
import signal
import socket
from common.trex_status_e import TRexStatus
import subprocess
import time
import threading
import logging
import CCustomLogger
# setup the logger
CCustomLogger.setup_custom_logger('TRexServer')
logger = logging.getLogger('TRexServer')
class AsynchronousTRexSession(threading.Thread):
def __init__(self, trexObj , trex_launch_path, trex_cmd_data):
super(AsynchronousTRexSession, self).__init__()
self.stoprequest = threading.Event()
self.terminateFlag = False
self.launch_path = trex_launch_path
self.cmd, self.export_path, self.duration = trex_cmd_data
self.session = None
self.trexObj = trexObj
self.time_stamps = {'start' : None, 'run_time' : None}
self.trexObj.zmq_dump = {}
def run (self):
with open(os.devnull, 'w') as DEVNULL:
self.time_stamps['start'] = self.time_stamps['run_time'] = time.time()
self.session = subprocess.Popen("exec "+self.cmd, cwd = self.launch_path, shell=True, stdin = DEVNULL, stderr = subprocess.PIPE, preexec_fn=os.setsid)
logger.info("T-Rex session initialized successfully, Parent process pid is {pid}.".format( pid = self.session.pid ))
while self.session.poll() is None: # subprocess is NOT finished
time.sleep(0.5)
if self.stoprequest.is_set():
logger.debug("Abort request received by handling thread. Terminating T-Rex session." )
os.killpg(self.session.pid, signal.SIGUSR1)
self.trexObj.set_status(TRexStatus.Idle)
self.trexObj.set_verbose_status("T-Rex is Idle")
break
self.time_stamps['run_time'] = time.time() - self.time_stamps['start']
try:
if self.time_stamps['run_time'] < 5:
logger.error("T-Rex run failed due to wrong input parameters, or due to reachability issues.")
self.trexObj.set_verbose_status("T-Rex run failed due to wrong input parameters, or due to reachability issues.\n\nT-Rex command: {cmd}\n\nRun output:\n{output}".format(
cmd = self.cmd, output = self.load_trex_output(self.export_path)))
self.trexObj.errcode = -11
elif (self.session.returncode is not None and self.session.returncode < 0) or ( (self.time_stamps['run_time'] < self.duration) and (not self.stoprequest.is_set()) ):
if (self.session.returncode is not None and self.session.returncode < 0):
logger.debug("Failed T-Rex run due to session return code ({ret_code})".format( ret_code = self.session.returncode ) )
elif ( (self.time_stamps['run_time'] < self.duration) and not self.stoprequest.is_set()):
logger.debug("Failed T-Rex run due to running time ({runtime}) combined with no-stopping request.".format( runtime = self.time_stamps['run_time'] ) )
logger.warning("T-Rex run was terminated unexpectedly by outer process or by the hosting OS")
self.trexObj.set_verbose_status("T-Rex run was terminated unexpectedly by outer process or by the hosting OS.\n\nRun output:\n{output}".format(
output = self.load_trex_output(self.export_path)))
self.trexObj.errcode = -15
else:
logger.info("T-Rex run session finished.")
self.trexObj.set_verbose_status('T-Rex finished.')
self.trexObj.errcode = None
finally:
self.trexObj.set_status(TRexStatus.Idle)
logger.info("TRex running state changed to 'Idle'.")
self.trexObj.expect_trex.clear()
logger.debug("Finished handling a single run of T-Rex.")
self.trexObj.zmq_dump = None
def join (self, timeout = None):
self.stoprequest.set()
super(AsynchronousTRexSession, self).join(timeout)
def load_trex_output (self, export_path):
output = None
with open(export_path, 'r') as f:
output = f.read()
return output
if __name__ == "__main__":
pass
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