from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.bdl_ import BDL_
emu = Emulation("./config_files/example.config.py", [0, 1])
emu.setLinkCmdBackend(BDL_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/TwoNode_80211a_adhoc")
nb1.setNodes([n0, n1])
emu.addNetworkBlocks([nb1])
udperf_app1 = UdperfApp(n0, n1, 0.0, 99, 9000, 6000, 6001)
udperf_app2 = UdperfApp(n1, n0, 0.0, 99, 9000, 6000, 6001)
n0.addUserResult("/home/nfd/cmdScheduler.log", "cmdSched0.log_%RUN%")
n1.addUserResult("/home/nfd/cmdScheduler.log", "cmdSched1.log_%RUN%")
emu.setDuration(102)
emu.addApplications([udperf_app1, udperf_app2])
emu.setName('simple_sequence')
emu.setNumberOfRuns(3)
emu.setSecondsBetweenRuns(15)
for intervalSize in [1000, 500, 250, 100]:
emu.setName(intervalSize)
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.bdl_ import BDL_
from emulation_lib.linkcmd_backends.netem_bdl_ import netem_BDL_
from emulation_lib.linkcmd_backends.d_bl import D_BL
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(D_BL())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/two_node_7000")
nb1.setNodes([n0, n1])
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 110, 7500, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log", "cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(112)
emu.addApplications([udperf_app])
emu.setSecondsBetweenRuns(5)
emu.setNumberOfRuns(1)
for interval in [1000]:
nb1.selectInterval(interval)
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.preprocessing.set_constant_value_for_column import SetConstantValueForColumn
from emulation_lib.linkcmd_backends.bdl_ import BDL_
from emulation_lib.linkcmd_backends.d_bl import D_BL
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(D_BL())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/two_node_7000")
nb1.setNodes([n0, n1])
nb1.addPreprocessingStep(SetConstantValueForColumn("", 3, 27000.0)) # empty prefix -> apply to all files
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 110, 7500, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log", "cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(112)
emu.addApplications([udperf_app])
emu.setSecondsBetweenRuns(5)
emu.setNumberOfRuns(1)
for interval in [1000]:
nb1.selectInterval(interval)
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.b_ import B_
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(B_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/symmetric_half")
nb1.setNodes([n0, n1])
nb1.selectInterval(1000)
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 12, 3000, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log", "cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(14)
emu.addApplications([udperf_app])
emu.setName('symmetric_half')
emu.setOutputDirectory('./results/' + emu.getName())
emu.setNumberOfRuns(10)
emu.setSecondsBetweenRuns(5)
emu.start()
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.preprocessing.set_constant_value_for_column import SetConstantValueForColumn
from emulation_lib.linkcmd_backends.bd_ import BD_
from emulation_lib.linkcmd_backends.bdl_ import BDL_
from emulation_lib.linkcmd_backends.netem_bdl_ import netem_BDL_
from emulation_lib.linkcmd_backends.d_bl import D_BL
from emulation_lib.linkcmd_backends.dl_b import DL_B
cmd_dists = [BD_(), BDL_(), netem_BDL_(), D_BL(), DL_B()]
emu = Emulation("../example.config.py", [0, 1])
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/original_sim_normal")
nb1.selectInterval(1000)
nb1.setNodes([n0, n1])
nb1.addPreprocessingStep(SetConstantValueForColumn(
"", 3, 27000.0)) # empty prefix -> apply to all files
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 110, 7500, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log",
"cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(112)
emu.addApplications([udperf_app])
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.b_ import B_
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(B_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/baseline_60Mbps")
nb1.setNodes([n0, n1])
nb1.selectInterval(1000)
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 12, 60000, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log",
"cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(14)
emu.addApplications([udperf_app])
emu.setName('baseline_60Mbps')
emu.setOutputDirectory('./results/' + emu.getName())
emu.setNumberOfRuns(10)
emu.setSecondsBetweenRuns(5)
emu.start()
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.preprocessing.set_constant_value_for_column import SetConstantValueForColumn
from emulation_lib.linkcmd_backends.bd_ import BD_
from emulation_lib.linkcmd_backends.bdl_ import BDL_
from emulation_lib.linkcmd_backends.netem_bdl_ import netem_BDL_
from emulation_lib.linkcmd_backends.d_bl import D_BL
from emulation_lib.linkcmd_backends.dl_b import DL_B
cmd_dists = [BD_(), BDL_(), netem_BDL_(), D_BL(), DL_B()]
emu = Emulation("../example.config.py", [0, 1])
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/TwoNode_80211a_adhoc")
nb1.selectInterval(1000)
nb1.setNodes([n0, n1])
nb1.addPreprocessingStep(SetConstantValueForColumn(
"", 3, 27000.0)) # empty prefix -> apply to all files
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 110, 7500, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log",
"cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(112)
emu.addApplications([udperf_app])
from emulation_lib.linkcmd_backends.b_ import B_
# ==> n0
# |^|
# n1==> n2
# |v|
# ==> n3
emu = Emulation("../example.config.py", [0, 1, 2, 3])
emu.setLinkCmdBackend(B_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
n2 = emu.getNode(2)
n3 = emu.getNode(3)
nb1 = NetworkBlock("./blocks/symmetric")
nb1.setNodes([n0, n1])
nb1.selectInterval(1000)
nb2 = NetworkBlock("./blocks/symmetric")
nb2.setNodes([n2, n1])
nb2.selectInterval(1000)
nb3 = NetworkBlock("./blocks/symmetric")
nb3.setNodes([n3, n1])
nb3.selectInterval(1000)
emu.addNetworkBlocks([nb1, nb2, nb3])
udperf_app0 = UdperfApp(n1, n0, 0.0, 12, 6000, 6000, 6001)
udperf_app2 = UdperfApp(n1, n2, 0.0, 12, 6000, 6000, 6002) # own-Ports must be unique on the same node!
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.d_bl import D_BL
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(D_BL())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/original_sim_normal")
nb1.setNodes([n0, n1])
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 110, 7500, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log",
"cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(112)
emu.addApplications([udperf_app])
emu.setSecondsBetweenRuns(5)
emu.setNumberOfRuns(1)
for interval in [1000, 500, 250, 100]:
nb1.selectInterval(interval)
emu.setName('original_sim_normal_interval_' + str(interval))
emu.setOutputDirectory('./results/' + emu.getName())
emu.start()
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.b_ import B_
from emulation_lib.preprocessing.repeat_file_until import RepeatIntermedFileUntil
emu_duration = 60 # seconds
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(B_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/symmetric")
nb1.setNodes([n0, n1])
nb1.selectInterval(1000)
nb1.addPreprocessingStep(RepeatIntermedFileUntil(emu_duration, False))
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, emu_duration - 2, 6000, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log", "cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(emu_duration)
emu.addApplications([udperf_app])
emu.setName('symmetric_repeated')
emu.setOutputDirectory('./results/' + emu.getName())
emu = Emulation("./config_files/example.config.py", [0, 1, 2, 3])
emu.setLinkCmdBackend(BDL_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
n2 = emu.getNode(2)
n3 = emu.getNode(3)
s0_1 = StaticConnection(0, 1, 6442.800, 0.000724, 0.00)
s1_0 = StaticConnection(1, 0, 10983.440, 0.000632, 0.00)
s0_2 = StaticConnection(0, 2, 6442.800, 0.000724, 0.00)
s2_0 = StaticConnection(2, 0, 10983.440, 0.000632, 0.00)
snb = StaticNetworkBlock('../../emulation/test/static',
[s0_1, s1_0, s0_2, s2_0], 1000)
snb.setNodes([n0, n1, n2])
nb1 = NetworkBlock("./blocks/TwoNode_80211a_adhoc")
nb1.setNodes([n1, n3])
nb1.selectInterval(1000)
nb2 = NetworkBlock("./blocks/TwoNode_80211a_adhoc")
nb2.setNodes([n2, n3])
nb2.selectedInterval(1000)
emu.addNetworkBlocks([snb, nb1, nb2])
udperf_app0_1 = UdperfApp(n0, n1, 0.0, 99, 9000, 6000, 6001)
udperf_app1_0 = UdperfApp(n1, n0, 0.0, 99, 9000, 6000, 6001)
udperf_app0_2 = UdperfApp(n0, n2, 0.0, 99, 9000, 6000, 6001)
udperf_app2_0 = UdperfApp(n2, n0, 0.0, 99, 9000, 6000, 6001)
udperf_app1_3 = UdperfApp(n1, n3, 0.0, 99, 9000, 6000, 6001)
udperf_app3_1 = UdperfApp(n3, n1, 0.0, 99, 9000, 6000, 6001)
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.b_ import B_
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(B_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/symmetric")
nb1.setNodes([n0, n1])
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 12, 6000, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log", "cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(14)
emu.addApplications([udperf_app])
emu.setSecondsBetweenRuns(5)
emu.setNumberOfRuns(10)
for interval in [1000, 500, 250, 100]:
nb1.selectInterval(interval)
emu.setName('symmetric_interval_' + str(interval))
emu.setOutputDirectory('./results/' + emu.getName())
emu.start()
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.l_ import L_
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(L_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
# http://dashif.org/wp-content/uploads/2015/04/DASH-AVC-264-Test-Vectors-v09-CommunityReview.pdf
nb1 = NetworkBlock("./blocks/NP2j")
nb1.setNodes([n0, n1])
nb1.selectInterval(1000)
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 12, 10000, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log",
"cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(14)
emu.addApplications([udperf_app])
emu.setName('NP2j_loss')
emu.setOutputDirectory('./results/' + emu.getName())
emu.setNumberOfRuns(10)
emu.setSecondsBetweenRuns(5)
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.b_ import B_
from emulation_lib.preprocessing.set_constant_value_for_column import SetConstantValueForColumn
emu_duration = 14 # seconds
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(B_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/symmetric")
nb1.setNodes([n0, n1])
nb1.selectInterval(1000)
nb1.addPreprocessingStep(SetConstantValueForColumn("1_0", 3, 10000.0))
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, emu_duration - 2, 6000, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log",
"cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(emu_duration)
emu.addApplications([udperf_app])
emu.setName('symmetric_constantValue')
emu.setOutputDirectory('./results/' + emu.getName())
emu = Emulation("./example.config.py", list(range(0,12 + NUM_CLIENTS)))
emu.setName(os.path.basename(wifi_block) + "_" + app_type + "_" + str(run))
emu.setLinkCmdBackend(BDL_())
emu.setSecondsBetweenRuns(5)
emu.setOutputDirectory('./results/onlyNdnDemoApps_experiment/' + emu.getName())
emu.setDuration(EMULATION_DURATION) # seconds
# ensure NFD-logfiles are cleaned up and wldrdaemons are shutdown
for node in emu.getNodes():
node.scheduleUserCmd(constants.SETUP_TIME, "sudo rm /var/run/shm/nfd_packet_log/nfd_packet_log.csv")
node.scheduleUserCmd(constants.SETUP_TIME, "sudo killall wldrdaemon_udp")
node.scheduleUserCmd(constants.SETUP_TIME, "sudo killall tail")
# set up network-blocks
abileneNetwork = NetworkBlock("./blocks/abilene")
abileneNetwork.setNodes(emu.getNodes()[0:12])
abileneNetwork.selectInterval(1000) # without consequence as network-properties are static anyway (in this scenario)
abileneNetwork.addPreprocessingStep(RepeatIntermedFileUntil(EMULATION_DURATION, False))
network_blocks = []
# read topology from file
with open("./topologies/abilene.txt","r") as topologyFile:
topology = topologyFile.readlines()
groups = {emu.getNode(serverNode): []}
clientGatewayAssoc = {}
# add blocks for "last-miles"
for client_num in range(0, len(client_gateways)):
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.bdl_ import BDL_
emu = Emulation("./config_files/example.config.py", [0, 1])
emu.setLinkCmdBackend(BDL_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/profile1")
nb1.setNodes([n0, n1])
nb1.selectInterval(1000)
emu.addNetworkBlocks([nb1])
udperf_app1 = UdperfApp(n0, n1, 0.0, 19, 3000, 6000, 6001)
udperf_app2 = UdperfApp(n1, n0, 0.0, 19, 3000, 6000, 6001)
n0.addUserResult("/home/nfd/cmdScheduler.log", "cmdSched0.log_%RUN%")
n1.addUserResult("/home/nfd/cmdScheduler.log", "cmdSched1.log_%RUN%")
emu.setDuration(20)
emu.addApplications([udperf_app1, udperf_app2])
emu.setName('reactionTime')
emu.setOutputDirectory('./results/' + emu.getName())
emu.setNumberOfRuns(3)
emu.setSecondsBetweenRuns(15)
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.preprocessing.set_constant_value_for_column import SetConstantValueForColumn
from emulation_lib.linkcmd_backends.bdl_ import BDL_
emu = Emulation("example.config.py", [0, 1])
emu.setLinkCmdBackend(BDL_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
nb1 = NetworkBlock("./blocks/simple_mobility_802.11G_AdHoc_constant")
nb1.setNodes([n0, n1])
nb1.addPreprocessingStep(SetConstantValueForColumn("", 3, 27000.0)) # empty prefix -> apply to all files
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 110, 10000, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log", "cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(112)
emu.addApplications([udperf_app])
emu.setSecondsBetweenRuns(5)
emu.setNumberOfRuns(40)
for interval in [1000, 500, 250, 100, 50, 25]:
nb1.selectInterval(interval)
emu.setName(str(interval))
import os
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(BDL_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
blockPaths = [
"./blocks/sim2/simple_mobility_802.11A_AdHoc",
"./blocks/sim2/simple_mobility_802.11G_AdHoc_Arf",
"./blocks/sim2/simple_mobility_802.11G_AdHoc_constant",
"./blocks/sim2/two_nodes_802.11G",
"./blocks/sim2/wifi_linearDistanceUDP_deferredStart_udperf",
"./blocks/sim2/two_nodes_802.11G_unidir"
]
nb1 = NetworkBlock(blockPaths[0]) # init nb1
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 110, 10000, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log",
"cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(112)
emu.addApplications([udperf_app])
emu.setSecondsBetweenRuns(5)
emu.setNumberOfRuns(1)
for bpath in blockPaths:
# update nb1
from emulation_lib.emulation import Emulation
from emulation_lib.network_blocks.network_block import NetworkBlock
from emulation_lib.apps.udperf_app import UdperfApp
from emulation_lib.linkcmd_backends.l_ import L_
emu = Emulation("../example.config.py", [0, 1])
emu.setLinkCmdBackend(L_())
n0 = emu.getNode(0)
n1 = emu.getNode(1)
# http://dashif.org/wp-content/uploads/2015/04/DASH-AVC-264-Test-Vectors-v09-CommunityReview.pdf
nb1 = NetworkBlock("./blocks/flicflac")
nb1.setNodes([n0, n1])
nb1.selectInterval(1000)
emu.addNetworkBlocks([nb1])
udperf_app = UdperfApp(n1, n0, 0.0, 12, 10000, 6000, 6001)
n1.addUserResult("/home/nfd/cmdScheduler.log",
"cmdSched" + str(n1.getId()) + ".log_%RUN%")
emu.setDuration(14)
emu.addApplications([udperf_app])
emu.setName('flicflac_loss')
emu.setOutputDirectory('./results/' + emu.getName())
emu.setNumberOfRuns(10)
emu.setSecondsBetweenRuns(5)
emu = Emulation("./example.config.py", list(range(0, NUMBER_OF_NODES)))
emu.setName("HelloWorld")
emu.setLinkCmdBackend(BDL_())
emu.setSecondsBetweenRuns(5)
emu.setOutputDirectory('./results/HelloWorld')
# time in seconds, after which a run is to be considered finished, which triggers the fetching
# of the results and the initiation of the next run
emu.setDuration(EMULATION_DURATION) # seconds
#
# configure network block
#
# the folder containing the pre-calculated intermediate files to be used
WIFI_BLOCK = "./blocks/simple_mobility_802.11G_AdHoc_constant"
# create a new network block object based on the given intermediate file folder
wlan = NetworkBlock(WIFI_BLOCK)
wlan.setNodes(
emu.getNodes()
[0:NUMBER_OF_NODES]) # assign all two nodes to be part of the network
# select interval of network condition changes
# ./blocks/simple_mobility_802.11G_AdHoc_constant/0_1_1000.txt
# ./blocks/simple_mobility_802.11G_AdHoc_constant/1_0_1000.txt
wlan.selectInterval(1000)
# preprocessing steps are ways to modify intermediate files without changing the originals (experimentation)
# if the given intermediate files were too long, here we could use a preprocessing step to only take the first n seconds
wlan.addPreprocessingStep(RepeatIntermedFileUntil(EMULATION_DURATION, False))
# for this example, we only want to restrict the bandwidth (column #3 in the intermediate file)
# and therefore overwrite the columns for delay (#1) and loss (#2) with zeros using the following preprocessing steps
wlan.addPreprocessingStep(SetConstantValueForColumn("", 1, 0))
