--- /dev/null
+#
+# NEPI, a framework to manage network experiments
+# Copyright (C) 2014 INRIA
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation;
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+# Author: Alina Quereilhac <alina.quereilhac@inria.fr>
+
+from nepi.execution.attribute import Attribute, Flags, Types
+from nepi.execution.trace import Trace, TraceAttr
+from nepi.execution.resource import ResourceManager, clsinit_copy, \
+ ResourceState, ResourceFactory
+from nepi.resources.linux.application import LinuxApplication
+from nepi.util.timefuncs import tnow, tdiffsec
+from nepi.resources.ns3.ns3simulation import NS3Simulation
+from nepi.resources.ns3.ns3wrapper import SIMULATOR_UUID, GLOBAL_VALUE_UUID, \
+ IPV4_GLOBAL_ROUTING_HELPER_UUID
+from nepi.resources.linux.ns3.ns3client import LinuxNS3Client
+
+import os
+import time
+import threading
+
+@clsinit_copy
+class LinuxNS3Simulation(LinuxApplication, NS3Simulation):
+ _rtype = "linux::ns3::Simulation"
+
+ @classmethod
+ def _register_attributes(cls):
+ impl_type = Attribute("simulatorImplementationType",
+ "The object class to use as the simulator implementation",
+ allowed = ["ns3::DefaultSimulatorImpl", "ns3::RealtimeSimulatorImpl"],
+ default = "ns3::DefaultSimulatorImpl",
+ type = Types.Enumerate,
+ flags = Flags.Design)
+
+ sched_type = Attribute("schedulerType",
+ "The object class to use as the scheduler implementation",
+ allowed = ["ns3::MapScheduler",
+ "ns3::ListScheduler",
+ "ns3::HeapScheduler",
+ "ns3::MapScheduler",
+ "ns3::CalendarScheduler"
+ ],
+ default = "ns3::MapScheduler",
+ type = Types.Enumerate,
+ flags = Flags.Design)
+
+ check_sum = Attribute("checksumEnabled",
+ "A global switch to enable all checksums for all protocols",
+ default = False,
+ type = Types.Bool,
+ flags = Flags.Design)
+
+ ns_log = Attribute("nsLog",
+ "NS_LOG environment variable. " \
+ " Will only generate output if ns-3 is compiled in DEBUG mode. ",
+ flags = Flags.Design)
+
+ verbose = Attribute("verbose",
+ "True to output debugging info from the ns3 client-server communication",
+ type = Types.Bool,
+ flags = Flags.Design)
+
+ enable_dump = Attribute("enableDump",
+ "Enable dumping the remote executed ns-3 commands to a script "
+ "in order to later reproduce and debug the experiment",
+ type = Types.Bool,
+ default = False,
+ flags = Flags.Design)
+
+ build_mode = Attribute("buildMode",
+ "Mode used to build ns-3 with waf. One if: debug, release, oprimized ",
+ default = "optimized",
+ allowed = ["debug", "release", "optimized"],
+ type = Types.Enumerate,
+ flags = Flags.Design)
+
+ ns3_version = Attribute("ns3Version",
+ "Version of ns-3 to install from nsam repo",
+ default = "ns-3.20",
+ #default = "ns-3-dev",
+ flags = Flags.Design)
+
+ pybindgen_version = Attribute("pybindgenVersion",
+ "Version of pybindgen to install from bazar repo",
+ default = "868",
+ #default = "876",
+ flags = Flags.Design)
+
+ dce_version = Attribute("dceVersion",
+ "Version of dce to install from nsam repo (tag branch for repo)",
+ #default = "dce-1.3",
+ default = "dce-dev",
+ flags = Flags.Design)
+
+ populate_routing_tables = Attribute("populateRoutingTables",
+ "Invokes Ipv4GlobalRoutingHelper.PopulateRoutingTables() ",
+ default = False,
+ type = Types.Bool,
+ flags = Flags.Design)
+
+ stoptime = Attribute("StopTime",
+ "Time at which the simulation will stop",
+ flags = Flags.Design)
+
+ cls._register_attribute(impl_type)
+ cls._register_attribute(sched_type)
+ cls._register_attribute(check_sum)
+ cls._register_attribute(ns_log)
+ cls._register_attribute(enable_dump)
+ cls._register_attribute(verbose)
+ cls._register_attribute(build_mode)
+ cls._register_attribute(ns3_version)
+ cls._register_attribute(pybindgen_version)
+ cls._register_attribute(dce_version)
+ cls._register_attribute(populate_routing_tables)
+ cls._register_attribute(stoptime)
+
+ def __init__(self, ec, guid):
+ LinuxApplication.__init__(self, ec, guid)
+ NS3Simulation.__init__(self)
+
+ self._client = None
+ self._home = "ns3-simu-%s" % self.guid
+ self._socket_name = "ns3-%s.sock" % os.urandom(4).encode('hex')
+ self._enable_dce = None
+ self._dce_helper = None
+
+ @property
+ def socket_name(self):
+ return self._socket_name
+
+ @property
+ def remote_socket(self):
+ return os.path.join(self.run_home, self.socket_name)
+
+ def trace(self, name, attr = TraceAttr.ALL, block = 512, offset = 0):
+ # stout needs to get flushed on the ns-3 server side, else we will
+ # get an empty stream. We try twice to retrieve the stream
+ # if we get empty stdout since the stream might not be
+ # flushed immediately.
+ if name.endswith("stdout"):
+ self._client.flush()
+ result = LinuxApplication.trace(self, name, attr, block, offset)
+ if result:
+ return result
+ # Let the stream be flushed
+ time.sleep(1)
+
+ return LinuxApplication.trace(self, name, attr, block, offset)
+
+ def upload_sources(self):
+ self.node.mkdir(os.path.join(self.node.src_dir, "ns3wrapper"))
+
+ # upload ns3 wrapper python script
+ ns3_wrapper = os.path.join(os.path.dirname(__file__), "..", "..", "ns3",
+ "ns3wrapper.py")
+
+ self.node.upload(ns3_wrapper,
+ os.path.join(self.node.src_dir, "ns3wrapper", "ns3wrapper.py"),
+ overwrite = False)
+
+ # upload ns3 wrapper debug python script
+ ns3_wrapper_debug = os.path.join(os.path.dirname(__file__), "..", "..", "ns3",
+ "ns3wrapper_debug.py")
+
+ self.node.upload(ns3_wrapper_debug,
+ os.path.join(self.node.src_dir, "ns3wrapper", "ns3wrapper_debug.py"),
+ overwrite = False)
+
+ # upload ns3_server python script
+ ns3_server = os.path.join(os.path.dirname(__file__), "..", "..", "ns3",
+ "ns3server.py")
+
+ self.node.upload(ns3_server,
+ os.path.join(self.node.src_dir, "ns3wrapper", "ns3server.py"),
+ overwrite = False)
+
+ if self.node.use_rpm:
+ # upload pygccxml sources
+ pygccxml_tar = os.path.join(os.path.dirname(__file__), "dependencies",
+ "%s.tar.gz" % self.pygccxml_version)
+
+ self.node.upload(pygccxml_tar,
+ os.path.join(self.node.src_dir, "%s.tar.gz" % self.pygccxml_version),
+ overwrite = False)
+
+ # Upload user defined ns-3 sources
+ self.node.mkdir(os.path.join(self.node.src_dir, "ns-3"))
+ src_dir = os.path.join(self.node.src_dir, "ns-3")
+
+ super(LinuxNS3Simulation, self).upload_sources(src_dir = src_dir)
+
+ def upload_extra_sources(self, sources = None, src_dir = None):
+ return super(LinuxNS3Simulation, self).upload_sources(
+ sources = sources,
+ src_dir = src_dir)
+
+ def upload_start_command(self):
+ command = self.get("command")
+ env = self.get("env")
+
+ # We want to make sure the ccnd is running
+ # before the experiment starts.
+ # Run the command as a bash script in background,
+ # in the host ( but wait until the command has
+ # finished to continue )
+ env = self.replace_paths(env)
+ command = self.replace_paths(command)
+
+ shfile = os.path.join(self.app_home, "start.sh")
+ self.node.upload_command(command,
+ shfile = shfile,
+ env = env,
+ overwrite = True)
+
+ # Run the ns3wrapper
+ self._run_in_background()
+
+ # Wait until the remote socket is created
+ self.wait_remote_socket()
+
+ def configure(self):
+ if self.has_changed("simulatorImplementationType"):
+ simu_type = self.get("simulatorImplementationType")
+ stype = self.create("StringValue", simu_type)
+ self.invoke(GLOBAL_VALUE_UUID, "Bind", "SimulatorImplementationType", stype)
+
+ if self.has_changed("checksumEnabled"):
+ check_sum = self.get("checksumEnabled")
+ btrue = self.create("BooleanValue", check_sum)
+ self.invoke(GLOBAL_VALUE_UUID, "Bind", "ChecksumEnabled", btrue)
+
+ if self.has_changed("schedulerType"):
+ sched_type = self.get("schedulerType")
+ stype = self.create("StringValue", sched_type)
+ self.invoke(GLOBAL_VALUE_UUID, "Bind", "SchedulerType", btrue)
+
+ def do_deploy(self):
+ if not self.node or self.node.state < ResourceState.READY:
+ self.debug("---- RESCHEDULING DEPLOY ---- node state %s " % self.node.state )
+
+ # ccnd needs to wait until node is deployed and running
+ self.ec.schedule(self.reschedule_delay, self.deploy)
+ else:
+ if not self.get("command"):
+ self.set("command", self._start_command)
+
+ if not self.get("depends"):
+ self.set("depends", self._dependencies)
+
+ if self.get("sources"):
+ sources = self.get("sources")
+ source = sources.split(" ")[0]
+ basename = os.path.basename(source)
+ version = ( basename.strip().replace(".tar.gz", "")
+ .replace(".tar","")
+ .replace(".gz","")
+ .replace(".zip","") )
+
+ self.set("ns3Version", version)
+ self.set("sources", source)
+
+ if not self.get("build"):
+ self.set("build", self._build)
+
+ if not self.get("install"):
+ self.set("install", self._install)
+
+ if not self.get("env"):
+ self.set("env", self._environment)
+
+ self.do_discover()
+ self.do_provision()
+
+ # Create client
+ self._client = LinuxNS3Client(self)
+
+ self.configure()
+
+ self.set_ready()
+
+ def do_start(self):
+ """ Starts simulation execution
+
+ """
+ self.info("Starting")
+
+ if self.state == ResourceState.READY:
+ if self.get("populateRoutingTables") == True:
+ self.invoke(IPV4_GLOBAL_ROUTING_HELPER_UUID, "PopulateRoutingTables")
+
+ time = self.get("StopTime")
+ if time:
+ self._client.stop(time=time)
+
+ self._client.start()
+
+ self.set_started()
+ else:
+ msg = " Failed to execute command '%s'" % command
+ self.error(msg, out, err)
+ raise RuntimeError(msg)
+
+ def do_stop(self):
+ """ Stops simulation execution
+
+ """
+ if self.state == ResourceState.STARTED:
+ if not self.get("StopTime"):
+ self._client.stop()
+ self.set_stopped()
+
+ def do_release(self):
+ self.info("Releasing resource")
+
+ tear_down = self.get("tearDown")
+ if tear_down:
+ self.node.execute(tear_down)
+
+ self.do_stop()
+ self._client.shutdown()
+ LinuxApplication.do_stop(self)
+
+ super(LinuxApplication, self).do_release()
+
+ @property
+ def state(self):
+ super(LinuxApplication, self).state
+
+ if self._state == ResourceState.STARTED:
+ try:
+ is_finished = self.invoke(SIMULATOR_UUID, "isFinished")
+
+ if is_finished:
+ self.set_stopped()
+ except:
+ msg = "Simulator failed. Can not retrieve state"
+ out = ""
+
+ import traceback
+ err = traceback.format_exc()
+ self.error(msg, out, err)
+ self.do_fail()
+
+ return self._state
+
+ @property
+ def enable_dce(self):
+ if self._enable_dce is None:
+ from nepi.resources.ns3.ns3dceapplication import NS3BaseDceApplication
+ rclass = ResourceFactory.get_resource_type(
+ NS3BaseDceApplication.get_rtype())
+
+ self._enable_dce = False
+ for guid in self.ec.resources:
+ rm = self.ec.get_resource(guid)
+ if isinstance(rm, rclass):
+ self._enable_dce = True
+
+ from nepi.resources.ns3.ns3dcehelper import NS3DceHelper
+ self._dce_helper = NS3DceHelper(self)
+ break
+
+ return self._enable_dce
+
+ @property
+ def dce_helper(self):
+ return self._dce_helper
+
+ @property
+ def _start_command(self):
+ command = []
+
+ command.append("PYTHONPATH=$PYTHONPATH:${SRC}/ns3wrapper/")
+
+ command.append("python ${SRC}/ns3wrapper/ns3server.py -S %s" % \
+ os.path.basename(self.remote_socket) )
+
+ ns_log = self.get("nsLog")
+ if ns_log:
+ command.append("-L '%s'" % ns_log)
+
+ if self.get("enableDump"):
+ command.append("-D")
+
+ if self.get("verbose"):
+ command.append("-v")
+
+ command = " ".join(command)
+ return command
+
+ @property
+ def _dependencies(self):
+ if self.node.use_rpm:
+ return ( " gcc gcc-c++ python python-devel mercurial bzr tcpdump socat gccxml unzip")
+ elif self.node.use_deb:
+ return ( " gcc g++ python python-dev mercurial bzr tcpdump socat gccxml python-pygccxml unzip")
+ return ""
+
+ @property
+ def ns3_repo(self):
+ return "http://code.nsnam.org"
+
+ @property
+ def pygccxml_version(self):
+ return "pygccxml-1.0.0"
+
+ @property
+ def dce_repo(self):
+ return "http://code.nsnam.org/ns-3-dce"
+ #eturn "http://code.nsnam.org/epmancini/ns-3-dce"
+
+ @property
+ def dce_version(self):
+ dce_version = self.get("dceVersion")
+ return dce_version or "dce-dev"
+
+ @property
+ def ns3_build_location(self):
+ location = "${BIN}/ns-3/%(ns3_version)s%(dce_version)s/%(build_mode)s/build" \
+ % {
+ "ns3_version": self.get("ns3Version"),
+ "dce_version": "-%s" % self.get("dceVersion") \
+ if self.enable_dce else "",
+ "build_mode": self.get("buildMode"),
+ }
+
+ return location
+
+
+ @property
+ def ns3_src_location(self):
+ location = "${SRC}/ns-3/%(ns3_version)s" \
+ % {
+ "ns3_version": self.get("ns3Version"),
+ }
+
+ return location
+
+ @property
+ def dce_src_location(self):
+ location = "${SRC}/ns-3-dce/%(dce_version)s" \
+ % {
+ "dce_version": self.get("dceVersion"),
+ }
+
+ return location
+
+ @property
+ def _clone_ns3_command(self):
+ source = self.get("sources")
+
+ if not source:
+ clone_ns3_cmd = "hg clone %(ns3_repo)s/%(ns3_version)s %(ns3_src)s" \
+ % {
+ "ns3_version": self.get("ns3Version"),
+ "ns3_repo": self.ns3_repo,
+ "ns3_src": self.ns3_src_location,
+ }
+ else:
+ if source.find(".tar.gz") > -1:
+ clone_ns3_cmd = (
+ "tar xzf ${SRC}/ns-3/%(basename)s "
+ " --strip-components=1 -C %(ns3_src)s"
+ ) % {
+ "basename": os.path.basename(source),
+ "ns3_src": self.ns3_src_location,
+ }
+ elif source.find(".tar") > -1:
+ clone_ns3_cmd = (
+ "tar xf ${SRC}/ns-3/%(basename)s "
+ " --strip-components=1 -C %(ns3_src)s"
+ ) % {
+ "basename": os.path.basename(source),
+ "ns3_src": self.ns3_src_location,
+ }
+ elif source.find(".zip") > -1:
+ basename = os.path.basename(source)
+ bare_basename = basename.replace(".zip", "")
+
+ clone_ns3_cmd = (
+ "unzip ${SRC}/ns-3/%(basename)s && "
+ "mv ${SRC}/ns-3/%(bare_basename)s %(ns3_src)s"
+ ) % {
+ "bare_basename": basename_name,
+ "basename": basename,
+ "ns3_src": self.ns3_src_location,
+ }
+
+ return clone_ns3_cmd
+
+ @property
+ def _clone_dce_command(self):
+ clone_dce_cmd = " echo 'DCE will not be built' "
+
+ if self.enable_dce:
+ dce_version = self.dce_version
+ dce_tag = ""
+ if dce_version != "dce-dev":
+ dce_tag = "-r %s" % dce_version
+
+ clone_dce_cmd = (
+ # DCE installation
+ # Test if dce is alredy cloned
+ " ( "
+ " ( "
+ " ( test -d %(dce_src)s ) "
+ " && echo 'dce binaries found, nothing to do'"
+ " ) "
+ " ) "
+ " || "
+ # Get dce source code
+ " ( "
+ " mkdir -p %(dce_src)s && "
+ " hg clone %(dce_repo)s %(dce_tag)s %(dce_src)s"
+ " ) "
+ ) % {
+ "dce_repo": self.dce_repo,
+ "dce_tag": dce_tag,
+ "dce_src": self.dce_src_location,
+ }
+
+ return clone_dce_cmd
+
+ @property
+ def _build(self):
+ # If the user defined local sources for ns-3, we uncompress the sources
+ # on the remote sources directory. Else we clone ns-3 from the official repo.
+ clone_ns3_cmd = self._clone_ns3_command
+ clone_dce_cmd = self._clone_dce_command
+
+ ns3_build_cmd = (
+ # NS3 installation
+ "( "
+ " ( "
+ # Test if ns-3 is alredy cloned
+ " ((( test -d %(ns3_src)s ) || "
+ " ( test -d ${NS3BINDINGS:='None'} && test -d ${NS3LIBRARIES:='None'})) "
+ " && echo 'ns-3 binaries found, nothing to do' )"
+ " ) "
+ " || "
+ # If not, install ns-3 and its dependencies
+ " ( "
+ # Install pygccxml
+ " ( "
+ " ( "
+ " python -c 'import pygccxml' && "
+ " echo 'pygccxml not found' "
+ " ) "
+ " || "
+ " ( "
+ " tar xf ${SRC}/%(pygccxml_version)s.tar.gz -C ${SRC} && "
+ " cd ${SRC}/%(pygccxml_version)s && "
+ " python setup.py build && "
+ " sudo -S python setup.py install "
+ " ) "
+ " ) "
+ # Install pybindgen
+ " && "
+ " ( "
+ " ( "
+ " test -d ${SRC}/pybindgen/%(pybindgen_version)s && "
+ " echo 'binaries found, nothing to do' "
+ " ) "
+ " || "
+ # If not, clone and build
+ " ( cd ${SRC} && "
+ " mkdir -p ${SRC}/pybindgen && "
+ " bzr checkout lp:pybindgen -r %(pybindgen_version)s ${SRC}/pybindgen/%(pybindgen_version)s && "
+ " cd ${SRC}/pybindgen/%(pybindgen_version)s && "
+ " ./waf configure && "
+ " ./waf "
+ " ) "
+ " ) "
+ " && "
+ # Get ns-3 source code
+ " ( "
+ " mkdir -p %(ns3_src)s && "
+ " %(clone_ns3_cmd)s "
+ " ) "
+ " ) "
+ ") "
+ " && "
+ "( "
+ " %(clone_dce_cmd)s "
+ ") "
+ ) % {
+ "ns3_src": self.ns3_src_location,
+ "pybindgen_version": self.get("pybindgenVersion"),
+ "pygccxml_version": self.pygccxml_version,
+ "clone_ns3_cmd": clone_ns3_cmd,
+ "clone_dce_cmd": clone_dce_cmd,
+ }
+
+ return ns3_build_cmd
+
+ @property
+ def _install_dce_command(self):
+ install_dce_cmd = " echo 'DCE will not be installed'"
+
+ if self.enable_dce:
+ install_dce_cmd = (
+ " ( "
+ " ((test -d %(ns3_build)s/bin_dce ) && "
+ " echo 'dce binaries found, nothing to do' )"
+ " ) "
+ " ||"
+ " ( "
+ # If not, copy build to dce
+ " cd %(dce_src)s && "
+ " rm -rf %(dce_src)s/build && "
+ " ./waf configure %(enable_opt)s --with-pybindgen=${SRC}/pybindgen/%(pybindgen_version)s "
+ " --prefix=%(ns3_build)s --with-ns3=%(ns3_build)s && "
+ " ./waf build && "
+ " ./waf install && "
+ " [ ! -e %(ns3_build)s/lib/python/site-packages/ns/dce.so ] && "
+ " mv %(ns3_build)s/lib*/python*/site-packages/ns/dce.so %(ns3_build)s/lib/python/site-packages/ns/ "
+ " )"
+ ) % {
+ "pybindgen_version": self.get("pybindgenVersion"),
+ "enable_opt": "--enable-opt" if self.get("buildMode") == "optimized" else "",
+ "ns3_build": self.ns3_build_location,
+ "dce_src": self.dce_src_location,
+ }
+
+ return install_dce_cmd
+
+ @property
+ def _install(self):
+ install_dce_cmd = self._install_dce_command
+
+ install_ns3_cmd = (
+ # Test if ns-3 is alredy installed
+ "("
+ " ( "
+ " ( ( (test -d %(ns3_build)s/lib ) || "
+ " (test -d ${NS3BINDINGS:='None'} && test -d ${NS3LIBRARIES:='None'}) ) && "
+ " echo 'binaries found, nothing to do' )"
+ " ) "
+ " ||"
+ " ( "
+ # If not, copy ns-3 build to bin
+ " mkdir -p %(ns3_build)s && "
+ " cd %(ns3_src)s && "
+ " rm -rf %(ns3_src)s/build && "
+ " ./waf configure -d %(build_mode)s --with-pybindgen=${SRC}/pybindgen/%(pybindgen_version)s "
+ " --prefix=%(ns3_build)s && "
+ " ./waf build && "
+ " ./waf install && "
+ " mv %(ns3_build)s/lib*/python* %(ns3_build)s/lib/python "
+ " )"
+ ") "
+ " && "
+ "( "
+ " %(install_dce_cmd)s "
+ ") "
+ ) % {
+ "pybindgen_version": self.get("pybindgenVersion"),
+ "build_mode": self.get("buildMode"),
+ "install_dce_cmd": install_dce_cmd,
+ "ns3_build": self.ns3_build_location,
+ "ns3_src": self.ns3_src_location,
+ }
+
+ return install_ns3_cmd
+
+ @property
+ def _environment(self):
+ env = []
+ env.append("PYTHONPATH=$PYTHONPATH:${NS3BINDINGS:=%(ns3_build)s/lib/python/site-packages}" % {
+ "ns3_build": self.ns3_build_location
+ })
+ # If NS3LIBRARIES is defined and not empty, assign its value,
+ # if not assign ns3_build_home/lib/ to NS3LIBRARIES and LD_LIBARY_PATH
+ env.append("LD_LIBRARY_PATH=${NS3LIBRARIES:=%(ns3_build)s/lib}" % {
+ "ns3_build": self.ns3_build_location
+ })
+ env.append("DCE_PATH=$NS3LIBRARIES/../bin_dce")
+ env.append("DCE_ROOT=$NS3LIBRARIES/..")
+
+ return " ".join(env)
+
+ def replace_paths(self, command):
+ """
+ Replace all special path tags with shell-escaped actual paths.
+ """
+ return ( command
+ .replace("${USR}", self.node.usr_dir)
+ .replace("${LIB}", self.node.lib_dir)
+ .replace("${BIN}", self.node.bin_dir)
+ .replace("${SRC}", self.node.src_dir)
+ .replace("${SHARE}", self.node.share_dir)
+ .replace("${EXP}", self.node.exp_dir)
+ .replace("${EXP_HOME}", self.node.exp_home)
+ .replace("${APP_HOME}", self.app_home)
+ .replace("${RUN_HOME}", self.run_home)
+ .replace("${NODE_HOME}", self.node.node_home)
+ .replace("${HOME}", self.node.home_dir)
+ # If NS3LIBRARIES is defined and not empty, use that value,
+ # if not use ns3_build_home/lib/
+ .replace("${BIN_DCE}", "${NS3LIBRARIES-%s/lib}/../bin_dce" % \
+ self.ns3_build_location)
+ )
+
+ def valid_connection(self, guid):
+ # TODO: Validate!
+ return True
+
+ def wait_remote_socket(self):
+ """ Waits until the remote socket is created
+ """
+ command = " [ -e %s ] && echo 'DONE' " % self.remote_socket
+
+ for i in range(200):
+ (out, err), proc = self.node.execute(command, retry = 1,
+ with_lock = True)
+
+ if out.find("DONE") > -1:
+ break
+ else:
+ raise RuntimeError("Remote socket not found at %s" % \
+ self.remote_socket)
+
+