main.py

#/*
# * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
# * contributor license agreements.  See the NOTICE file distributed with
# * this work for additional information regarding copyright ownership.
# * The OpenAirInterface Software Alliance licenses this file to You under
# * the OAI Public License, Version 1.1  (the "License"); you may not use this file
# * except in compliance with the License.
# * You may obtain a copy of the License at
# *
# *      http://www.openairinterface.org/?page_id=698
# *
# * Unless required by applicable law or agreed to in writing, software
# * distributed under the License is distributed on an "AS IS" BASIS,
# * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# * See the License for the specific language governing permissions and
# * limitations under the License.
# *-------------------------------------------------------------------------------
# * For more information about the OpenAirInterface (OAI) Software Alliance:
# *      contact@openairinterface.org
# */
#---------------------------------------------------------------------
# Python for CI of OAI-eNB + COTS-UE
#
#   Required Python Version
#     Python 3.x
#
#   Required Python Package
#     pexpect
#---------------------------------------------------------------------

#-----------------------------------------------------------
# Version
#-----------------------------------------------------------
Version = '0.1'

#-----------------------------------------------------------
# Import
#-----------------------------------------------------------
import sys		# arg
import re		# reg
import pexpect		# pexpect
import time		# sleep
import os
import xml.etree.ElementTree as ET
import logging
import datetime
import signal
from multiprocessing import Process, Lock, SimpleQueue
logging.basicConfig(
	level=logging.DEBUG,
	format="[%(asctime)s] %(name)s:%(levelname)s: %(message)s"
)

#-----------------------------------------------------------
# Class Declaration
#-----------------------------------------------------------
class SSHConnection():
	def __init__(self):
		self.eNBIPAddress = ''
		self.eNBRepository = ''
		self.eNBBranch = ''
		self.eNB_AllowMerge = False
		self.eNBCommitID = ''
		self.eNBUserName = ''
		self.eNBPassword = ''
		self.eNBSourceCodePath = ''
		self.EPCIPAddress = ''
		self.EPCUserName = ''
		self.EPCPassword = ''
		self.EPCSourceCodePath = ''
		self.EPCType = ''
		self.ADBIPAddress = ''
		self.ADBUserName = ''
		self.ADBPassword = ''
		self.testCase_id = ''
		self.testXMLfile = ''
		self.desc = ''
		self.Build_eNB_args = ''
		self.Initialize_eNB_args = ''
		self.ping_args = ''
		self.ping_packetloss_threshold = ''
		self.iperf_args = ''
		self.iperf_packetloss_threshold = ''
		self.iperf_profile = ''
		self.UEDevices = []
		self.UEIPAddresses = []
		self.htmlFile = ''
		self.htmlHeaderCreated = False
		self.htmlFooterCreated = False
		self.htmlUEConnected = 0

	def open(self, ipaddress, username, password):
		self.ssh = pexpect.spawn('ssh', [username + '@' + ipaddress], timeout = 5)
		self.sshresponse = self.ssh.expect(['Are you sure you want to continue connecting (yes/no)?', 'password:', 'Last login', pexpect.EOF, pexpect.TIMEOUT])
		if self.sshresponse == 0:
			self.ssh.sendline('yes')
			self.ssh.expect('password:')
			self.ssh.sendline(password)
			self.sshresponse = self.ssh.expect(['\$', 'Permission denied', 'password:', pexpect.EOF, pexpect.TIMEOUT])
			if self.sshresponse == 0:
				pass
			else:
				logging.debug('self.sshresponse = ' + str(self.sshresponse))
				sys.exit('SSH Connection Failed')
		elif self.sshresponse == 1:
			self.ssh.sendline(password)
			self.sshresponse = self.ssh.expect(['\$', 'Permission denied', 'password:', pexpect.EOF, pexpect.TIMEOUT])
			if self.sshresponse == 0:
				pass
			else:
				logging.debug('self.sshresponse = ' + str(self.sshresponse))
				sys.exit('SSH Connection Failed')
		elif self.sshresponse == 2:
			# Checking if we are really on the remote client defined by its IP address
			self.command('stdbuf -o0 ifconfig | egrep --color=never "inet addr:"', '\$', 5)
			result = re.search(str(ipaddress), str(self.ssh.before))
			if result is None:
				sys.exit('SSH Connection Failed: TIMEOUT !!!')
			pass
		else:
			# debug output
			logging.debug(str(self.ssh.before))
			logging.debug('self.sshresponse = ' + str(self.sshresponse))
			sys.exit('SSH Connection Failed!!!')

	def command(self, commandline, expectedline, timeout):
		logging.debug(commandline)
		self.ssh.timeout = timeout
		self.ssh.sendline(commandline)
		self.sshresponse = self.ssh.expect([expectedline, pexpect.EOF, pexpect.TIMEOUT])
		if self.sshresponse == 0:
			pass
		elif self.sshresponse == 1:
			logging.debug('\u001B[1;37;41m Unexpected EOF \u001B[0m')
			logging.debug('Expected Line : ' + expectedline)
			sys.exit(self.sshresponse)
		elif self.sshresponse == 2:
			logging.debug('\u001B[1;37;41m Unexpected TIMEOUT \u001B[0m')
			logging.debug('Expected Line : ' + expectedline)
			sys.exit(self.sshresponse)
		else:
			logging.debug('\u001B[1;37;41m Unexpected Others \u001B[0m')
			logging.debug('Expected Line : ' + expectedline)
			sys.exit(self.sshresponse)

	def close(self):
		self.ssh.timeout = 5
		self.ssh.sendline('exit')
		self.sshresponse = self.ssh.expect([pexpect.EOF, pexpect.TIMEOUT])
		if self.sshresponse == 0:
			pass
		elif self.sshresponse == 1:
			logging.debug('\u001B[1;37;41m Unexpected TIMEOUT \u001B[0m')
		else:
			logging.debug('\u001B[1;37;41m Unexpected Others \u001B[0m')

	def copy(self, ipaddress, username, password, source, destination):
		logging.debug('scp '+ username + '@' + ipaddress + ':' + source + ' ' + destination)
		scp_spawn = pexpect.spawn('scp '+ username + '@' + ipaddress + ':' + source + ' ' + destination, timeout = 5)
		scp_response = scp_spawn.expect(['Are you sure you want to continue connecting (yes/no)?', 'password:', pexpect.EOF, pexpect.TIMEOUT])
		if scp_response == 0:
			scp_spawn.sendline('yes')
			scp_spawn.expect('password:')
			scp_spawn.sendline(password)
			scp_response = scp_spawn.expect(['\$', 'Permission denied', 'password:', pexpect.EOF, pexpect.TIMEOUT])
			if scp_response == 0:
				pass
			else:
				logging.debug('1 - scp_response = ' + str(scp_response))
				sys.exit('SCP failed')
		elif scp_response == 1:
			scp_spawn.sendline(password)
			scp_response = scp_spawn.expect(['\$', 'Permission denied', 'password:', pexpect.EOF, pexpect.TIMEOUT])
			if scp_response == 0 or scp_response == 3:
				pass
			else:
				logging.debug('2 - scp_response = ' + str(scp_response))
				sys.exit('SCP failed')
		elif scp_response == 2:
			pass
		else:
			logging.debug('3 - scp_response = ' + str(scp_response))
			sys.exit('SCP failed')

	def BuildeNB(self):
		if self.eNBIPAddress == '' or self.eNBRepository == '' or self.eNBBranch == '' or self.eNBUserName == '' or self.eNBPassword == '' or self.eNBSourceCodePath == '':
			Usage()
			sys.exit('Insufficient Parameter')
		self.open(self.eNBIPAddress, self.eNBUserName, self.eNBPassword)
		self.command('mkdir -p ' + self.eNBSourceCodePath, '\$', 5)
		self.command('cd ' + self.eNBSourceCodePath, '\$', 5)
		self.command('if [ ! -e .git ]; then stdbuf -o0 git clone ' + self.eNBRepository + ' .; else stdbuf -o0 git fetch; fi', '\$', 600)
		# Raphael: here add a check if git clone or git fetch went smoothly
		self.command('git config user.email "jenkins@openairinterface.org"', '\$', 5)
		self.command('git config user.name "OAI Jenkins"', '\$', 5)
		self.command('echo ' + self.eNBPassword + ' | sudo -S git clean -x -d -ff', '\$', 30)
		# if the commit ID is provided use it to point to it
		if self.eNBCommitID != '':
			self.command('git checkout -f ' + self.eNBCommitID, '\$', 5)
		# if the branch is not develop, then it is a merge request and we need to do 
		# the potential merge. Note that merge conflicts should already been checked earlier
		if (self.eNB_AllowMerge):
			if (self.eNBBranch != 'develop') and (self.eNBBranch != 'origin/develop'):
				self.command('git merge --ff origin/develop -m "Temporary merge for CI"', '\$', 5)
		self.command('source oaienv', '\$', 5)
		self.command('cd cmake_targets', '\$', 5)
		self.command('mkdir -p  log', '\$', 5)
		# no need to remove in log (git clean did the trick)
		self.command('echo ' + self.eNBPassword + ' | sudo -S stdbuf -o0 ./build_oai ' + self.Build_eNB_args + ' 2>&1 | stdbuf -o0 tee -a compile_oai_enb.log', 'Bypassing the Tests', 600)
		self.command('mkdir -p build_log_' + SSH.testCase_id, '\$', 5)
		self.command('echo ' + self.eNBPassword + ' | sudo -S mv log/* ' + 'build_log_' + SSH.testCase_id, '\$', 5)
		self.command('echo ' + self.eNBPassword + ' | sudo -S mv compile_oai_enb.log ' + 'build_log_' + SSH.testCase_id, '\$', 5)
		self.close()
		self.CreateHtmlTestRow(self.Build_eNB_args, 'OK', 0)

	def InitializeHSS(self):
		if self.EPCIPAddress == '' or self.EPCUserName == '' or self.EPCPassword == '' or self.EPCSourceCodePath == '' or self.EPCType == '':
			Usage()
			sys.exit('Insufficient Parameter')
		self.open(self.EPCIPAddress, self.EPCUserName, self.EPCPassword)
		if re.match('OAI', self.EPCType, re.IGNORECASE):
			logging.debug('Using the OAI EPC HSS')
			self.command('cd ' + self.EPCSourceCodePath, '\$', 5)
			self.command('source oaienv', '\$', 5)
			self.command('cd scripts', '\$', 5)
			self.command('echo ' + self.EPCPassword + ' | sudo -S ./run_hss 2>&1 | stdbuf -o0 awk \'{ print strftime("[%Y/%m/%d %H:%M:%S] ",systime()) $0 }\' | stdbuf -o0 tee -a hss_' + SSH.testCase_id + '.log &', 'Core state: 2 -> 3', 35)
		else:
			logging.debug('Using the ltebox simulated HSS')
			self.command('if [ -d ' + self.EPCSourceCodePath + '/scripts ]; then echo ' + self.eNBPassword + ' | sudo -S rm -Rf ' + self.EPCSourceCodePath + '/scripts ; fi', '\$', 5)
			self.command('mkdir -p ' + self.EPCSourceCodePath + '/scripts', '\$', 5)
			self.command('cd /opt/hss_sim0609', '\$', 5)
			self.command('echo ' + self.EPCPassword + ' | sudo -S rm -f hss.log daemon.log', '\$', 5)
			self.command('echo ' + self.EPCPassword + ' | sudo -S echo "Starting sudo session" && sudo daemon --unsafe --name=simulated_hss --chdir=/opt/hss_sim0609 ./starthss_real  ', '\$', 5)
		self.close()
		self.CreateHtmlTestRow(self.EPCType, 'OK', 0)

	def InitializeMME(self):
		if self.EPCIPAddress == '' or self.EPCUserName == '' or self.EPCPassword == '' or self.EPCSourceCodePath == '' or self.EPCType == '':
			Usage()
			sys.exit('Insufficient Parameter')
		self.open(self.EPCIPAddress, self.EPCUserName, self.EPCPassword)
		if re.match('OAI', self.EPCType, re.IGNORECASE):
			self.command('cd ' + self.EPCSourceCodePath, '\$', 5)
			self.command('source oaienv', '\$', 5)
			self.command('cd scripts', '\$', 5)
			self.command('stdbuf -o0 hostname', '\$', 5)
			result = re.search('hostname\\\\r\\\\n(?P<host_name>[a-zA-Z0-9\-\_]+)\\\\r\\\\n', str(self.ssh.before))
			if result is None:
				logging.debug('\u001B[1;37;41m Hostname Not Found! \u001B[0m')
				sys.exit(1)
			host_name = result.group('host_name')
			self.command('echo ' + self.EPCPassword + ' | sudo -S ./run_mme 2>&1 | stdbuf -o0 tee -a mme_' + SSH.testCase_id + '.log &', 'MME app initialization complete', 100)
		else:
			self.command('cd /opt/ltebox/tools', '\$', 5)
			self.command('echo ' + self.EPCPassword + ' | sudo -S ./start_mme', '\$', 5)
		self.close()
		self.CreateHtmlTestRow(self.EPCType, 'OK', 0)

	def InitializeSPGW(self):
		if self.EPCIPAddress == '' or self.EPCUserName == '' or self.EPCPassword == '' or self.EPCSourceCodePath == '' or self.EPCType == '':
			Usage()
			sys.exit('Insufficient Parameter')
		self.open(self.EPCIPAddress, self.EPCUserName, self.EPCPassword)
		if re.match('OAI', self.EPCType, re.IGNORECASE):
			self.command('cd ' + self.EPCSourceCodePath, '\$', 5)
			self.command('source oaienv', '\$', 5)
			self.command('cd scripts', '\$', 5)
			self.command('echo ' + self.EPCPassword + ' | sudo -S ./run_spgw 2>&1 | stdbuf -o0 tee -a spgw_' + SSH.testCase_id + '.log &', 'Initializing SPGW-APP task interface: DONE', 30)
		else:
			self.command('cd /opt/ltebox/tools', '\$', 5)
			self.command('echo ' + self.EPCPassword + ' | sudo -S ./start_xGw', '\$', 5)
		self.close()
		self.CreateHtmlTestRow(self.EPCType, 'OK', 0)

	def InitializeeNB(self):
		if self.eNBIPAddress == '' or self.eNBUserName == '' or self.eNBPassword == '' or self.eNBSourceCodePath == '':
			Usage()
			sys.exit('Insufficient Parameter')
		initialize_eNB_flag = True
		self.CheckProcessExist(initialize_eNB_flag)
		self.open(self.eNBIPAddress, self.eNBUserName, self.eNBPassword)
		self.command('cd ' + self.eNBSourceCodePath, '\$', 5)
		# Initialize_eNB_args usually start with -O and followed by the location in repository
		full_config_file = self.Initialize_eNB_args.replace('-O ','')
		config_path, config_file = os.path.split(full_config_file)
		ci_full_config_file = config_path + '/ci-' + config_file
		# Make a copy and adapt to EPC / eNB IP addresses
		self.command('cp ' + full_config_file + ' ' + ci_full_config_file, '\$', 5)
		self.command('sed -i -e \'s/mme_ip_address.*$/mme_ip_address      = ( { ipv4       = "' + self.EPCIPAddress + '";/\' ' + ci_full_config_file, '\$', 2);
		self.command('sed -i -e \'s/ENB_IPV4_ADDRESS_FOR_S1_MME.*$/ENB_IPV4_ADDRESS_FOR_S1_MME              = "' + self.eNBIPAddress + '";/\' ' + ci_full_config_file, '\$', 2);
		self.command('sed -i -e \'s/ENB_IPV4_ADDRESS_FOR_S1U.*$/ENB_IPV4_ADDRESS_FOR_S1U                 = "' + self.eNBIPAddress + '";/\' ' + ci_full_config_file, '\$', 2);
		# Launch eNB with the modified config file
		self.command('source oaienv', '\$', 5)
		self.command('cd cmake_targets', '\$', 5)
		self.command('echo "./lte_build_oai/build/lte-softmodem -O ' + self.eNBSourceCodePath + '/' + ci_full_config_file + '" > ./my-lte-softmodem-run.sh ', '\$', 5)
		self.command('chmod 775 ./my-lte-softmodem-run.sh ', '\$', 5)
		self.command('echo ' + self.eNBPassword + ' | sudo -S -E daemon --inherit --unsafe --name=enb_daemon --chdir=' + self.eNBSourceCodePath + '/cmake_targets -o ' + self.eNBSourceCodePath + '/cmake_targets/enb_' + SSH.testCase_id + '.log ./my-lte-softmodem-run.sh', '\$', 5)
		time.sleep(6)
		doLoop = True
		loopCounter = 10
		while (doLoop):
			loopCounter = loopCounter - 1
			if (loopCounter == 0):
				doLoop = False
				logging.debug('\u001B[1;30;43m eNB logging system did not show got sync! See with attach later \u001B[0m')
				self.CreateHtmlTestRow(config_file, 'eNB not showing got sync!', 0)
				# Not getting got sync is bypassed for the moment
				#sys.exit(1)
			self.command('stdbuf -o0 cat enb_' + SSH.testCase_id + '.log | grep -i sync', '\$', 10)
			result = re.search('got sync', str(self.ssh.before))
			if result is None:
				time.sleep(6)
			else:
				doLoop = False
				self.CreateHtmlTestRow(config_file, 'OK', 0)
				logging.debug('\u001B[1m Initialize eNB Completed\u001B[0m')

		self.close()

	def InitializeUE_common(self, device_id):
		logging.debug('send adb commands')
		try:
			self.open(self.ADBIPAddress, self.ADBUserName, self.ADBPassword)
			# The following commands are deprecated since we no longer work on Android 7+
			# self.command('stdbuf -o0 adb -s ' + device_id + ' shell settings put global airplane_mode_on 1', '\$', 10)
			# self.command('stdbuf -o0 adb -s ' + device_id + ' shell am broadcast -a android.intent.action.AIRPLANE_MODE --ez state true', '\$', 60)
			# a dedicated script has to be installed inside the UE
			# airplane mode on means call /data/local/tmp/off
			self.command('stdbuf -o0 adb -s ' + device_id + ' shell /data/local/tmp/off', '\$', 60)
			#airplane mode off means call /data/local/tmp/on
			logging.debug('\u001B[1mUE (' + device_id + ') Initialize Completed\u001B[0m')
			self.close()
		except:
			os.kill(os.getppid(),signal.SIGUSR1)

	def InitializeUE(self):
		if self.ADBIPAddress == '' or self.ADBUserName == '' or self.ADBPassword == '':
			Usage()
			sys.exit('Insufficient Parameter')
		multi_jobs = []
		for device_id in self.UEDevices:
			p = Process(target = SSH.InitializeUE_common, args = (device_id,))
			p.daemon = True
			p.start()
			multi_jobs.append(p)
		for job in multi_jobs:
			job.join()
		self.CreateHtmlTestRow('N/A', 'OK', 0)

	def AttachUE_common(self, device_id, statusQueue, lock):
		try:
			self.open(self.ADBIPAddress, self.ADBUserName, self.ADBPassword)
			self.command('stdbuf -o0 adb -s ' + device_id + ' shell /data/local/tmp/on', '\$', 60)
			time.sleep(2)
			max_count = 45
			count = max_count
			while count > 0:
				self.command('stdbuf -o0 adb -s ' + device_id + ' shell dumpsys telephony.registry | grep mDataConnectionState', '\$', 15)
				result = re.search('mDataConnectionState.*=(?P<state>[0-9\-]+)', str(self.ssh.before))
				if result is None:
					logging.debug('\u001B[1;37;41m mDataConnectionState Not Found! \u001B[0m')
					lock.acquire()
					statusQueue.put(-1)
					statusQueue.put(device_id)
					statusQueue.put('mDataConnectionState Not Found!')
					lock.release()
					break
				mDataConnectionState = int(result.group('state'))
				if mDataConnectionState == 2:
					logging.debug('\u001B[1mUE (' + device_id + ') Attach Completed\u001B[0m')
					lock.acquire()
					statusQueue.put(max_count - count)
					statusQueue.put(device_id)
					statusQueue.put('Attach Completed')
					lock.release()
					break
				count = count - 1
				if count == 15 or count == 30:
					logging.debug('\u001B[1;37;43m Retry UE (' + device_id + ') Flight Mode Off \u001B[0m')
					self.command('stdbuf -o0 adb -s ' + device_id + ' shell /data/local/tmp/off', '\$', 60)
					time.sleep(0.5)
					self.command('stdbuf -o0 adb -s ' + device_id + ' shell /data/local/tmp/on', '\$', 60)
					time.sleep(0.5)
				logging.debug('\u001B[1mWait UE (' + device_id + ') a second until mDataConnectionState=2 (' + str(max_count-count) + ' times)\u001B[0m')
				time.sleep(1)
			if count == 0:
				logging.debug('\u001B[1;37;41m UE (' + device_id + ') Attach Failed \u001B[0m')
				lock.acquire()
				statusQueue.put(-1)
				statusQueue.put(device_id)
				statusQueue.put('Attach Failed')
				lock.release()
			self.close()
		except:
			os.kill(os.getppid(),signal.SIGUSR1)

	def AttachUE(self):
		if self.ADBIPAddress == '' or self.ADBUserName == '' or self.ADBPassword == '':
			Usage()
			sys.exit('Insufficient Parameter')
		initialize_eNB_flag = False
		self.CheckProcessExist(initialize_eNB_flag)
		multi_jobs = []
		status_queue = SimpleQueue()
		lock = Lock()
		for device_id in self.UEDevices:
			p = Process(target = SSH.AttachUE_common, args = (device_id, status_queue, lock,))
			p.daemon = True
			p.start()
			multi_jobs.append(p)
		for job in multi_jobs:
			job.join()

		if (status_queue.empty()):
			self.CreateHtmlTestRow('N/A', 'KO', len(self.UEDevices))
			sys.exit(1)
		else:
			attach_status = True
			html_queue = SimpleQueue()
			while (not status_queue.empty()):
				count = status_queue.get()
				if (count < 0):
					attach_status = False
				device_id = status_queue.get()
				message = status_queue.get()
				if (count < 0):
					html_cell = "<pre>UE (" + device_id + ")\n" + message + "</pre>"
				else:
					html_cell = "<pre>UE (" + device_id + ")\n" + message + ' in ' + str(count + 2) + ' seconds</pre>'
				html_queue.put(html_cell)
			if (attach_status):
				self.CreateHtmlTestRowQueue('N/A', 'OK', len(self.UEDevices), html_queue)
			else:
				self.CreateHtmlTestRowQueue('N/A', 'KO', len(self.UEDevices), html_queue)
				self.CreateHtmlFooter()
				sys.exit(1)

	def DetachUE_common(self, device_id):
		try:
			self.open(self.ADBIPAddress, self.ADBUserName, self.ADBPassword)
			self.command('stdbuf -o0 adb -s ' + device_id + ' shell /data/local/tmp/off', '\$', 60)
			logging.debug('\u001B[1mUE (' + device_id + ') Detach Completed\u001B[0m')
			self.close()
		except:
			os.kill(os.getppid(),signal.SIGUSR1)

	def DetachUE(self):
		if self.ADBIPAddress == '' or self.ADBUserName == '' or self.ADBPassword == '':
			Usage()
			sys.exit('Insufficient Parameter')
		initialize_eNB_flag = False
		self.CheckProcessExist(initialize_eNB_flag)
		multi_jobs = []
		for device_id in self.UEDevices:
			p = Process(target = SSH.DetachUE_common, args = (device_id,))
			p.daemon = True
			p.start()
			multi_jobs.append(p)
		for job in multi_jobs:
			job.join()
		self.CreateHtmlTestRow('N/A', 'OK', 0)

	def RebootUE_common(self, device_id):
		try:
			self.open(self.ADBIPAddress, self.ADBUserName, self.ADBPassword)
			previousmDataConnectionStates = []
			# Save mDataConnectionState
			self.command('stdbuf -o0 adb -s ' + device_id + ' shell dumpsys telephony.registry | grep mDataConnectionState', '\$', 15)
			self.command('stdbuf -o0 adb -s ' + device_id + ' shell dumpsys telephony.registry | grep mDataConnectionState', '\$', 15)
			result = re.search('mDataConnectionState.*=(?P<state>[0-9\-]+)', str(self.ssh.before))
			if result is None:
				logging.debug('\u001B[1;37;41m mDataConnectionState Not Found! \u001B[0m')
				sys.exit(1)
			previousmDataConnectionStates.append(int(result.group('state')))
			# Reboot UE
			self.command('stdbuf -o0 adb -s ' + device_id + ' shell reboot', '\$', 10)
			time.sleep(60)
			previousmDataConnectionState = previousmDataConnectionStates.pop(0)
			count = 180
			while count > 0:
				count = count - 1
				self.command('stdbuf -o0 adb -s ' + device_id + ' shell dumpsys telephony.registry | grep mDataConnectionState', '\$', 15)
				result = re.search('mDataConnectionState.*=(?P<state>[0-9\-]+)', str(self.ssh.before))
				if result is None:
					mDataConnectionState = None
				else:
					mDataConnectionState = int(result.group('state'))
					logging.debug('mDataConnectionState = ' + result.group('state'))
				if mDataConnectionState is None or (previousmDataConnectionState == 2 and mDataConnectionState != 2):
					logging.debug('\u001B[1mWait UE (' + device_id + ') a second until reboot completion (' + str(180-count) + ' times)\u001B[0m')
					time.sleep(1)
				else:
					logging.debug('\u001B[1mUE (' + device_id + ') Reboot Completed\u001B[0m')
					break
			if count == 0:
				logging.debug('\u001B[1;37;41m UE (' + device_id + ') Reboot Failed \u001B[0m')
				sys.exit(1)
			self.close()
		except:
			os.kill(os.getppid(),signal.SIGUSR1)

	def RebootUE(self):
		if self.ADBIPAddress == '' or self.ADBUserName == '' or self.ADBPassword == '':
			Usage()
			sys.exit('Insufficient Parameter')
		initialize_eNB_flag = False
		self.CheckProcessExist(initialize_eNB_flag)
		multi_jobs = []
		for device_id in self.UEDevices:
			p = Process(target = SSH.RebootUE_common, args = (device_id,))
			p.daemon = True
			p.start()
			multi_jobs.append(p)
		for job in multi_jobs:
			job.join()
		self.CreateHtmlTestRow('N/A', 'OK', 0)

	def GetAllUEDevices(self, terminate_ue_flag):
		if self.ADBIPAddress == '' or self.ADBUserName == '' or self.ADBPassword == '':
			Usage()
			sys.exit('Insufficient Parameter')
		self.open(self.ADBIPAddress, self.ADBUserName, self.ADBPassword)
		self.command('adb devices', '\$', 15)
		self.UEDevices = re.findall("\\\\r\\\\n([A-Za-z0-9]+)\\\\tdevice",str(self.ssh.before))
		if terminate_ue_flag == False:
			if len(self.UEDevices) == 0:
				logging.debug('\u001B[1;37;41m UE Not Found! \u001B[0m')
				sys.exit(1)
		self.close()

	def GetAllUEIPAddresses(self):
		if self.ADBIPAddress == '' or self.ADBUserName == '' or self.ADBPassword == '':
			Usage()
			sys.exit('Insufficient Parameter')
		self.UEIPAddresses = []
		self.open(self.ADBIPAddress, self.ADBUserName, self.ADBPassword)
		for device_id in self.UEDevices:
			self.command('stdbuf -o0 adb -s ' + device_id + ' shell ip addr show | grep rmnet', '\$', 15)
			result = re.search('inet (?P<ueipaddress>[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)\/[0-9]+[0-9a-zA-Z\.\s]+', str(self.ssh.before))
			if result is None:
				logging.debug('\u001B[1;37;41m UE IP Address Not Found! \u001B[0m')
				sys.exit(1)
			UE_IPAddress = result.group('ueipaddress')
			logging.debug('\u001B[1mUE (' + device_id + ') IP Address is ' + UE_IPAddress + '\u001B[0m')
			for ueipaddress in self.UEIPAddresses:
				if ueipaddress == UE_IPAddress:
					logging.debug('\u001B[1mUE (' + device_id + ') IP Address ' + UE_IPAddress + 'has been existed!' + '\u001B[0m')
					sys.exit(1)
			self.UEIPAddresses.append(UE_IPAddress)
		self.close()

	def Ping_common(self, lock, UE_IPAddress, device_id,statusQueue):
		try:
			self.open(self.EPCIPAddress, self.EPCUserName, self.EPCPassword)
			self.command('cd ' + self.EPCSourceCodePath, '\$', 5)
			self.command('cd scripts', '\$', 5)
			ping_time = re.findall("-c (\d+)",str(self.ping_args))
			self.command('stdbuf -o0 ping ' + self.ping_args + ' ' + UE_IPAddress + ' 2>&1 | stdbuf -o0 tee -a ping_' + SSH.testCase_id + '_' + device_id + '.log', '\$', int(ping_time[0])*1.5)
			result = re.search(', (?P<packetloss>[0-9\.]+)% packet loss, time [0-9\.]+ms', str(self.ssh.before))
			if result is None:
				message = 'Packet Loss Not Found!'
				logging.debug('\u001B[1;37;41m ' + message + ' \u001B[0m')
				lock.acquire()
				statusQueue.put(-1)
				statusQueue.put(device_id)
				statusQueue.put(message)
				lock.release()
				return
			packetloss = result.group('packetloss')
			if float(packetloss) == 100:
				message = 'Packet Loss is 100%'
				logging.debug('\u001B[1;37;41m ' + message + ' \u001B[0m')
				lock.acquire()
				statusQueue.put(-1)
				statusQueue.put(device_id)
				statusQueue.put(message)
				lock.release()
				return
			result = re.search('rtt min\/avg\/max\/mdev = (?P<rtt_min>[0-9\.]+)\/(?P<rtt_avg>[0-9\.]+)\/(?P<rtt_max>[0-9\.]+)\/[0-9\.]+ ms', str(self.ssh.before))
			if result is None:
				message = 'Ping RTT_Min RTT_Avg RTT_Max Not Found!'
				logging.debug('\u001B[1;37;41m ' + message + ' \u001B[0m')
				lock.acquire()
				statusQueue.put(-1)
				statusQueue.put(device_id)
				statusQueue.put(message)
				lock.release()
				return
			rtt_min = result.group('rtt_min')
			rtt_avg = result.group('rtt_avg')
			rtt_max = result.group('rtt_max')
			pal_msg = 'Packet Loss : ' + packetloss + '%'
			min_msg = 'RTT(Min)    : ' + rtt_min + ' ms'
			avg_msg = 'RTT(Avg)    : ' + rtt_avg + ' ms'
			max_msg = 'RTT(Max)    : ' + rtt_max + ' ms'
			lock.acquire()
			logging.debug('\u001B[1;37;44m ping result (' + UE_IPAddress + ') \u001B[0m')
			logging.debug('\u001B[1;34m    ' + pal_msg + '\u001B[0m')
			logging.debug('\u001B[1;34m    ' + min_msg + '\u001B[0m')
			logging.debug('\u001B[1;34m    ' + avg_msg + '\u001B[0m')
			logging.debug('\u001B[1;34m    ' + max_msg + '\u001B[0m')
			qMsg = pal_msg + '\n' + min_msg + '\n' + avg_msg + '\n' + max_msg
			packetLossOK = True
			if packetloss is not None:
				if float(packetloss) > float(self.ping_packetloss_threshold):
					qMsg += '\nPacket Loss too high'
					logging.debug('\u001B[1;37;41m Packet Loss too high \u001B[0m')
					packetLossOK = False
				elif float(packetloss) > 0:
					qMsg += '\nPacket Loss is not 0%'
					logging.debug('\u001B[1;37;43m Packet Loss is not 0% \u001B[0m')
			if (packetLossOK):
				statusQueue.put(0)
			else:
				statusQueue.put(-1)
			statusQueue.put(device_id)
			statusQueue.put(UE_IPAddress)
			statusQueue.put(qMsg)
			lock.release()
			self.close()
		except:
			os.kill(os.getppid(),signal.SIGUSR1)

	def Ping(self):
		if self.EPCIPAddress == '' or self.EPCUserName == '' or self.EPCPassword == '' or self.EPCSourceCodePath == '':
			Usage()
			sys.exit('Insufficient Parameter')
		initialize_eNB_flag = False
		self.CheckProcessExist(initialize_eNB_flag)
		self.GetAllUEIPAddresses()
		multi_jobs = []
		i = 0
		lock = Lock()
		status_queue = SimpleQueue()
		for UE_IPAddress in self.UEIPAddresses:
			device_id = self.UEDevices[i]
			p = Process(target = SSH.Ping_common, args = (lock,UE_IPAddress,device_id,status_queue,))
			p.daemon = True
			p.start()
			multi_jobs.append(p)
			i = i + 1
		for job in multi_jobs:
			job.join()

		if (status_queue.empty()):
			self.CreateHtmlTestRow(self.ping_args, 'KO', len(self.UEDevices))
			sys.exit(1)
		else:
			ping_status = True
			html_queue = SimpleQueue()
			while (not status_queue.empty()):
				count = status_queue.get()
				if (count < 0):
					ping_status = False
				device_id = status_queue.get()
				ip_addr = status_queue.get()
				message = status_queue.get()
				html_cell = "<pre>UE (" + device_id + ")\nIP Address  : " + ip_addr + "\n" + message + "</pre>"
				html_queue.put(html_cell)
			if (ping_status):
				self.CreateHtmlTestRowQueue(self.ping_args, 'OK', len(self.UEDevices), html_queue)
			else:
				self.CreateHtmlTestRowQueue(self.ping_args, 'KO', len(self.UEDevices), html_queue)
				self.CreateHtmlFooter()
				sys.exit(1)

	def Iperf_ComputeTime(self):
		result = re.search('-t (?P<iperf_time>\d+)', str(self.iperf_args))
		if result is None:
			logging.debug('\u001B[1;37;41m Iperf time Not Found! \u001B[0m')
			sys.exit(1)
		return result.group('iperf_time')

	def Iperf_ComputeModifiedBW(self, idx, ue_num):
		result = re.search('-b (?P<iperf_bandwidth>[0-9\.]+)[KMG]', str(self.iperf_args))
		if result is None:
			logging.debug('\u001B[1;37;41m Iperf bandwidth Not Found! \u001B[0m')
			sys.exit(1)
		iperf_bandwidth = result.group('iperf_bandwidth')
		if SSH.iperf_profile == 'balanced':
			iperf_bandwidth_new = float(iperf_bandwidth)/ue_num
		if SSH.iperf_profile == 'single-ue':
			iperf_bandwidth_new = float(iperf_bandwidth)
		if SSH.iperf_profile == 'unbalanced':
			# residual is 2% of max bw
			residualBW = float(iperf_bandwidth) / 50
			if idx == 0:
				iperf_bandwidth_new = float(iperf_bandwidth) - ((ue_num - 1) * residualBW)
			else:
				iperf_bandwidth_new = residualBW
		iperf_bandwidth_str = '-b ' + iperf_bandwidth
		iperf_bandwidth_str_new = '-b ' + str(iperf_bandwidth_new)
		result = re.sub(iperf_bandwidth_str, iperf_bandwidth_str_new, str(self.iperf_args))
		if result is None:
			logging.debug('\u001B[1;37;41m Calculate Iperf bandwidth Failed! \u001B[0m')
			sys.exit(1)
		return result

	def Iperf_analyzeV2Output(self, lock, UE_IPAddress, device_id, statusQueue):
		result = re.search('Server Report:', str(self.ssh.before))
		if result is None:
			result = re.search('read failed: Connection refused', str(self.ssh.before))
			if result is not None:
				logging.debug('\u001B[1;37;41m Could not connect to iperf server! \u001B[0m')
			else:
				logging.debug('\u001B[1;37;41m Server Report and Connection refused Not Found! \u001B[0m')
			return -1
		result = re.search('Server Report:\\\\r\\\\n(?:|\[ *\d+\].*) (?P<bitrate>[0-9\.]+ [KMG]bits\/sec) +(?P<jitter>[0-9\.]+ ms) +(\d+\/..\d+) (\((?P<packetloss>[0-9\.]+)%\))', str(self.ssh.before))
		if result is not None:
			bitrate = result.group('bitrate')
			packetloss = result.group('packetloss')
			jitter = result.group('jitter')
			lock.acquire()
			logging.debug('\u001B[1;37;44m iperf result (' + UE_IPAddress + ') \u001B[0m')
			iperfStatus = True
			msg = ''
			if bitrate is not None:
				msg += 'Bitrate     : ' + bitrate + '\n'
				logging.debug('\u001B[1;34m    Bitrate     : ' + bitrate + '\u001B[0m')
			if packetloss is not None:
				msg += 'Packet Loss : ' + packetloss + '%\n'
				logging.debug('\u001B[1;34m    Packet Loss : ' + packetloss + '%\u001B[0m')
				if float(packetloss) > float(self.iperf_packetloss_threshold):
					msg += 'Packet Loss too high!\n'
					logging.debug('\u001B[1;37;41m Packet Loss too high \u001B[0m')
					iperfStatus = False
			if jitter is not None:
				msg += 'Jitter      : ' + jitter + '\n'
				logging.debug('\u001B[1;34m    Jitter      : ' + jitter + '\u001B[0m')
			if (iperfStatus):
				statusQueue.put(0)
			else:
				statusQueue.put(-1)
			statusQueue.put(device_id)
			statusQueue.put(UE_IPAddress)
			statusQueue.put(msg)
			lock.release()
			return 0

	def Iperf_analyzeV2Server(self, lock, UE_IPAddress, device_id, statusQueue, iperf_real_options):
		if (not os.path.isfile('iperf_server_' + SSH.testCase_id + '_' + device_id + '.log')):
			lock.acquire()
			statusQueue.put(-1)
			statusQueue.put(device_id)
			statusQueue.put(UE_IPAddress)
			statusQueue.put('Could not analyze from server log')
			lock.release()
			return
		# Computing the requested bandwidth in float
		result = re.search('-b (?P<iperf_bandwidth>[0-9\.]+)[KMG]', str(iperf_real_options))
		if result is None:
			logging.debug('Iperf bandwidth Not Found!')
			lock.acquire()
			statusQueue.put(-1)
			statusQueue.put(device_id)
			statusQueue.put(UE_IPAddress)
			statusQueue.put('Could not compute Iperf bandwidth!')
			lock.release()
			return
		else:
			req_bandwidth = result.group('iperf_bandwidth')
			req_bw = float(req_bandwidth)
			result = re.search('-b [0-9\.]+K', str(iperf_real_options))
			if result is not None:
				req_bandwidth = '%.1f Kbits/sec' % req_bw
				req_bw = req_bw * 1000
			result = re.search('-b [0-9\.]+M', str(iperf_real_options))
			if result is not None:
				req_bandwidth = '%.1f Mbits/sec' % req_bw
				req_bw = req_bw * 1000000
			result = re.search('-b [0-9\.]+G', str(iperf_real_options))
			if result is not None:
				req_bandwidth = '%.1f Gbits/sec' % req_bw
				req_bw = req_bw * 1000000000

		server_file = open('iperf_server_' + SSH.testCase_id + '_' + device_id + '.log', 'r')
		br_sum = 0.0
		ji_sum = 0.0
		pl_sum = 0
		ps_sum = 0
		row_idx = 0
		for line in server_file.readlines():
			result = re.search('(?P<bitrate>[0-9\.]+ [KMG]bits\/sec) +(?P<jitter>[0-9\.]+ ms) +(?P<lostPack>[0-9]+)/ +(?P<sentPack>[0-9]+)', str(line))
			if result is not None:
				bitrate = result.group('bitrate')
				jitter = result.group('jitter')
				packetlost = result.group('lostPack')
				packetsent = result.group('sentPack')
				br = bitrate.split(' ')
				ji = jitter.split(' ')
				row_idx = row_idx + 1
				curr_br = float(br[0])
				pl_sum = pl_sum + int(packetlost)
				ps_sum = ps_sum + int(packetsent)
				if (br[1] == 'Kbits/sec'):
					curr_br = curr_br * 1000
				if (br[1] == 'Mbits/sec'):
					curr_br = curr_br * 1000 * 1000
				br_sum = curr_br + br_sum
				ji_sum = float(ji[0]) + ji_sum
		if (row_idx > 0):
			br_sum = br_sum / row_idx
			ji_sum = ji_sum / row_idx
			br_loss = 100 * br_sum / req_bw
			if (br_sum > 1000):
				br_sum = br_sum / 1000
				if (br_sum > 1000):
					br_sum = br_sum / 1000
					bitrate = '%.2f Mbits/sec' % br_sum
				else:
					bitrate = '%.2f Kbits/sec' % br_sum
			else:
				bitrate = '%.2f bits/sec' % br_sum
			bitperf = '%.2f ' % br_loss
			bitperf += '%'
			jitter = '%.2f ms' % (ji_sum)
			if (ps_sum > 0):
				pl = float(100 * pl_sum / ps_sum)
				packetloss = '%2.1f ' % (pl)
				packetloss += '%'
			else:
				packetloss = 'unknown'
			lock.acquire()
			if (br_loss < 90):
				statusQueue.put(1)
			else:
				statusQueue.put(0)
			statusQueue.put(device_id)
			statusQueue.put(UE_IPAddress)
			req_msg = 'Req Bitrate : ' + req_bandwidth
			bir_msg = 'Bitrate     : ' + bitrate
			brl_msg = 'Bitrate Perf: ' + bitperf
			jit_msg = 'Jitter      : ' + jitter
			pal_msg = 'Packet Loss : ' + packetloss
			statusQueue.put(req_msg + '\n' + bir_msg + '\n' + brl_msg + '\n' + jit_msg + '\n' + pal_msg + '\n')
			logging.debug('\u001B[1;37;45m iperf result (' + UE_IPAddress + ') \u001B[0m')
			logging.debug('\u001B[1;35m    ' + req_msg + '\u001B[0m')
			logging.debug('\u001B[1;35m    ' + bir_msg + '\u001B[0m')
			logging.debug('\u001B[1;35m    ' + brl_msg + '\u001B[0m')
			logging.debug('\u001B[1;35m    ' + jit_msg + '\u001B[0m')
			logging.debug('\u001B[1;35m    ' + pal_msg + '\u001B[0m')
			lock.release()
		else:
			lock.acquire()
			statusQueue.put(-1)
			statusQueue.put(device_id)
			statusQueue.put(UE_IPAddress)
			statusQueue.put('Could not analyze from server log')
			lock.release()

		server_file.close()


	def Iperf_analyzeV3Output(self, lock, UE_IPAddress, device_id, statusQueue):
		result = re.search('(?P<bitrate>[0-9\.]+ [KMG]bits\/sec) +(?:|[0-9\.]+ ms +\d+\/\d+ \((?P<packetloss>[0-9\.]+)%\)) +(?:|receiver)\\\\r\\\\n(?:|\[ *\d+\] Sent \d+ datagrams)\\\\r\\\\niperf Done\.', str(self.ssh.before))
		if result is None:
			result = re.search('(?P<error>iperf: error - [a-zA-Z0-9 :]+)', str(self.ssh.before))
			lock.acquire()
			statusQueue.put(-1)
			statusQueue.put(device_id)
			statusQueue.put(UE_IPAddress)
			if result is not None:
				logging.debug('\u001B[1;37;41m ' + result.group('error') + ' \u001B[0m')
				statusQueue.put(result.group('error'))
			else:
				logging.debug('\u001B[1;37;41m Bitrate and/or Packet Loss Not Found! \u001B[0m')
				statusQueue.put('Bitrate and/or Packet Loss Not Found!')
			lock.release()

		bitrate = result.group('bitrate')
		packetloss = result.group('packetloss')
		lock.acquire()
		logging.debug('\u001B[1;37;44m iperf result (' + UE_IPAddress + ') \u001B[0m')
		logging.debug('\u001B[1;34m    Bitrate     : ' + bitrate + '\u001B[0m')
		msg = 'Bitrate     : ' + bitrate + '\n'
		iperfStatus = True
		if packetloss is not None:
			logging.debug('\u001B[1;34m    Packet Loss : ' + packetloss + '%\u001B[0m')
			msg += 'Packet Loss : ' + packetloss + '%\n'
			if float(packetloss) > float(self.iperf_packetloss_threshold):
				logging.debug('\u001B[1;37;41m Packet Loss too high \u001B[0m')
				msg += 'Packet Loss too high!\n'
				iperfStatus = False
		if (iperfStatus):
			statusQueue.put(0)
		else:
			statusQueue.put(-1)
		statusQueue.put(device_id)
		statusQueue.put(UE_IPAddress)
		lock.release()

	def Iperf_UL_common(self, lock, UE_IPAddress, device_id, idx, ue_num, statusQueue):
		ipnumbers = UE_IPAddress.split('.')
		if (len(ipnumbers) == 4):
			ipnumbers[3] = '1'
		EPC_Iperf_UE_IPAddress = ipnumbers[0] + '.' + ipnumbers[1] + '.' + ipnumbers[2] + '.' + ipnumbers[3]

		# Launch iperf server on EPC side
		self.open(self.EPCIPAddress, self.EPCUserName, self.EPCPassword)
		self.command('cd ' + self.EPCSourceCodePath + '/scripts', '\$', 5)
		self.command('rm -f iperf_server_' + SSH.testCase_id + '_' + device_id + '.log', '\$', 5)
		port = 5001 + idx
		self.command('echo $USER; nohup iperf -u -s -i 1 -p ' + str(port) + ' > iperf_server_' + SSH.testCase_id + '_' + device_id + '.log &', self.EPCUserName, 5)
		time.sleep(0.5)
		self.close()

		# Launch iperf client on UE
		self.open(self.ADBIPAddress, self.ADBUserName, self.ADBPassword)
		self.command('cd ' + self.EPCSourceCodePath + '/scripts', '\$', 5)
		iperf_time = self.Iperf_ComputeTime()
		time.sleep(0.5)

		modified_options = self.Iperf_ComputeModifiedBW(idx, ue_num)
		modified_options = modified_options.replace('-R','')
		time.sleep(0.5)

		self.command('rm -f iperf_' + SSH.testCase_id + '_' + device_id + '.log', '\$', 5)
		self.command('stdbuf -o0 adb -s ' + device_id + ' shell "/data/local/tmp/iperf -c ' + EPC_Iperf_UE_IPAddress + ' ' + modified_options + ' -p ' + str(port) + '" 2>&1 | stdbuf -o0 tee -a iperf_' + SSH.testCase_id + '_' + device_id + '.log', '\$', int(iperf_time)*5.0)
		clientStatus = self.Iperf_analyzeV2Output(lock, UE_IPAddress, device_id, statusQueue)

		# Launch iperf server on EPC side
		self.open(self.EPCIPAddress, self.EPCUserName, self.EPCPassword)
		self.command('killall --signal SIGKILL iperf', self.EPCUserName, 5)
		self.close()
		if (clientStatus == -1):
			time.sleep(1)
			if (os.path.isfile('iperf_server_' + SSH.testCase_id + '_' + device_id + '.log')):
				os.remove('iperf_server_' + SSH.testCase_id + '_' + device_id + '.log')
			self.copy(self.EPCIPAddress, self.EPCUserName, self.EPCPassword, self.EPCSourceCodePath + '/scripts/iperf_server_' + SSH.testCase_id + '_' + device_id + '.log', '.')
			self.Iperf_analyzeV2Server(lock, UE_IPAddress, device_id, statusQueue, modified_options)

	def Iperf_common(self, lock, UE_IPAddress, device_id, idx, ue_num, statusQueue):
		try:
			# Single-UE profile -- iperf only on one UE
			if SSH.iperf_profile == 'single-ue' and idx != 0:
				return
			useIperf3 = False
			self.open(self.ADBIPAddress, self.ADBUserName, self.ADBPassword)
			# if by chance ADB server and EPC are on the same remote host, at least log collection will take care of it
			self.command('if [ ! -d ' + self.EPCSourceCodePath + '/scripts ]; then mkdir -p ' + self.EPCSourceCodePath + '/scripts ; fi', '\$', 5)
			self.command('cd ' + self.EPCSourceCodePath + '/scripts', '\$', 5)
			# Checking if iperf / iperf3 are installed
			self.command('adb -s ' + device_id + ' shell "ls /data/local/tmp"', '\$', 5)
			result = re.search('iperf3', str(self.ssh.before))
			if result is None:
				result = re.search('iperf', str(self.ssh.before))
				if result is None:
					message = 'Neither iperf nor iperf3 installed on UE!'
					lock.acquire()
					logging.debug('\u001B[1;37;41m ' + message + ' \u001B[0m')
					statusQueue.put(-1)
					statusQueue.put(device_id)
					statusQueue.put(UE_IPAddress)
					statusQueue.put(message)
					lock.release()
					return
					#sys.exit(1)
			else:
				useIperf3 = True
			# in case of iperf, UL has its own function
			if (not useIperf3):
				result = re.search('-R', str(self.iperf_args))
				if result is not None:
					self.close()
					self.Iperf_UL_common(lock, UE_IPAddress, device_id, idx, ue_num, statusQueue)
					return

			if (useIperf3):
				self.command('stdbuf -o0 adb -s ' + device_id + ' shell /data/local/tmp/iperf3 -s &', '\$', 5)
			else:
				self.command('rm -f iperf_server_' + SSH.testCase_id + '_' + device_id + '.log', '\$', 5)
				self.command('echo $USER; nohup adb -s ' + device_id + ' shell "/data/local/tmp/iperf -u -s -i 1" > iperf_server_' + SSH.testCase_id + '_' + device_id + '.log &', self.ADBUserName, 5)
			time.sleep(0.5)
			self.close()

			self.open(self.EPCIPAddress, self.EPCUserName, self.EPCPassword)
			self.command('cd ' + self.EPCSourceCodePath + '/scripts', '\$', 5)
			iperf_time = self.Iperf_ComputeTime()
			time.sleep(0.5)

			modified_options = self.Iperf_ComputeModifiedBW(idx, ue_num)
			time.sleep(0.5)

			self.command('rm -f iperf_' + SSH.testCase_id + '_' + device_id + '.log', '\$', 5)
			if (useIperf3):
				self.command('stdbuf -o0 iperf3 -c ' + UE_IPAddress + ' ' + modified_options + ' 2>&1 | stdbuf -o0 tee -a iperf_' + SSH.testCase_id + '_' + device_id + '.log', '\$', int(iperf_time)*5.0)

				clientStatus = 0
				self.Iperf_analyzeV3Output(lock, UE_IPAddress, device_id, statusQueue)
			else:
				self.command('stdbuf -o0 iperf -c ' + UE_IPAddress + ' ' + modified_options + ' 2>&1 | stdbuf -o0 tee -a iperf_' + SSH.testCase_id + '_' + device_id + '.log', '\$', int(iperf_time)*5.0)

				clientStatus = self.Iperf_analyzeV2Output(lock, UE_IPAddress, device_id, statusQueue)
			self.close()

			self.open(self.ADBIPAddress, self.ADBUserName, self.ADBPassword)
			self.command('stdbuf -o0 adb -s ' + device_id + ' shell ps | grep --color=never iperf | grep -v grep', '\$', 5)
			result = re.search('shell +(?P<pid>\d+)', str(self.ssh.before))
			if result is not None:
				pid_iperf = result.group('pid')