class EmaneManager(ModelManager):
"""
EMANE controller object. Lives in a Session instance and is used for
building EMANE config files from all of the EmaneNode objects in this
emulation, and for controlling the EMANE daemons.
"""
name = "emane"
config_type = RegisterTlvs.EMULATION_SERVER.value
SUCCESS, NOT_NEEDED, NOT_READY = (0, 1, 2)
EVENTCFGVAR = "LIBEMANEEVENTSERVICECONFIG"
DEFAULT_LOG_LEVEL = 3
def __init__(self, session):
"""
Creates a Emane instance.
:param core.session.Session session: session this manager is tied to
:return: nothing
"""
super(EmaneManager, self).__init__()
self.session = session
self._emane_nodes = {}
self._emane_node_lock = threading.Lock()
self._ifccounts = {}
self._ifccountslock = threading.Lock()
# port numbers are allocated from these counters
self.platformport = self.session.options.get_config_int("emane_platform_port", 8100)
self.transformport = self.session.options.get_config_int("emane_transform_port", 8200)
self.doeventloop = False
self.eventmonthread = None
# model for global EMANE configuration options
self.emane_config = EmaneGlobalModel(session)
self.set_configs(self.emane_config.default_values())
session.broker.handlers.add(self.handledistributed)
self.service = None
self.event_device = None
self.emane_check()
def getifcconfig(self, node_id, interface, model_name):
"""
Retrieve interface configuration or node configuration if not provided.
:param int node_id: node id
:param interface: node interface
:param str model_name: model to get configuration for
:return: node/interface model configuration
:rtype: dict
"""
# use the network-wide config values or interface(NEM)-specific values?
if interface is None:
return self.get_configs(node_id=node_id, config_type=model_name)
else:
# don"t use default values when interface config is the same as net
# note here that using ifc.node.objid as key allows for only one type
# of each model per node;
# TODO: use both node and interface as key
# Adamson change: first check for iface config keyed by "node:ifc.name"
# (so that nodes w/ multiple interfaces of same conftype can have
# different configs for each separate interface)
key = 1000 * interface.node.objid
if interface.netindex is not None:
key += interface.netindex
# try retrieve interface specific configuration, avoid getting defaults
config = self.get_configs(node_id=key, config_type=model_name)
# otherwise retrieve the interfaces node configuration, avoid using defaults
if not config:
config = self.get_configs(node_id=interface.node.objid, config_type=model_name)
# get non interface config, when none found
if not config:
# with EMANE 0.9.2+, we need an extra NEM XML from
# model.buildnemxmlfiles(), so defaults are returned here
config = self.get_configs(node_id=node_id, config_type=model_name)
return config
def config_reset(self, node_id=None):
super(EmaneManager, self).config_reset(node_id)
self.set_configs(self.emane_config.default_values())
def emane_check(self):
"""
Check if emane is installed and load models.
:return: nothing
"""
try:
# check for emane
emane_version = utils.check_cmd(["emane", "--version"])
logger.info("using EMANE: %s", emane_version)
# load default emane models
self.load_models(EMANE_MODELS)
# load custom models
custom_models_path = self.session.options.get_config("emane_models_dir")
if custom_models_path:
emane_models = utils.load_classes(custom_models_path, EmaneModel)
self.load_models(emane_models)
except CoreCommandError:
logger.info("emane is not installed")
def deleteeventservice(self):
if self.service:
for fd in self.service._readFd, self.service._writeFd:
if fd >= 0:
os.close(fd)
for f in self.service._socket, self.service._socketOTA:
if f:
f.close()
self.service = None
self.event_device = None
def initeventservice(self, filename=None, shutdown=False):
"""
Re-initialize the EMANE Event service.
The multicast group and/or port may be configured.
"""
self.deleteeventservice()
if shutdown:
return
# Get the control network to be used for events
group, port = self.get_config("eventservicegroup").split(":")
self.event_device = self.get_config("eventservicedevice")
eventnetidx = self.session.get_control_net_index(self.event_device)
if eventnetidx < 0:
logger.error("invalid emane event service device provided: %s", self.event_device)
return False
# make sure the event control network is in place
eventnet = self.session.add_remove_control_net(net_index=eventnetidx, remove=False, conf_required=False)
if eventnet is not None:
# direct EMANE events towards control net bridge
self.event_device = eventnet.brname
eventchannel = (group, int(port), self.event_device)
# disabled otachannel for event service
# only needed for e.g. antennaprofile events xmit by models
logger.info("using %s for event service traffic", self.event_device)
try:
self.service = EventService(eventchannel=eventchannel, otachannel=None)
except EventServiceException:
logger.exception("error instantiating emane EventService")
return True
def load_models(self, emane_models):
"""
Load EMANE models and make them available.
"""
for emane_model in emane_models:
logger.info("loading emane model: %s", emane_model.__name__)
self.models[emane_model.name] = emane_model
def add_node(self, emane_node):
"""
Add a new EmaneNode object to this Emane controller object
:param core.emane.nodes.EmaneNode emane_node: emane node to add
:return: nothing
"""
with self._emane_node_lock:
if emane_node.objid in self._emane_nodes:
raise KeyError("non-unique EMANE object id %s for %s" % (emane_node.objid, emane_node))
self._emane_nodes[emane_node.objid] = emane_node
def getnodes(self):
"""
Return a set of CoreNodes that are linked to an EmaneNode,
e.g. containers having one or more radio interfaces.
"""
# assumes self._objslock already held
nodes = set()
for emane_node in self._emane_nodes.values():
for netif in emane_node.netifs():
nodes.add(netif.node)
return nodes
def setup(self):
"""
Populate self._objs with EmaneNodes; perform distributed setup;
associate models with EmaneNodes from self.config. Returns
Emane.(SUCCESS, NOT_NEEDED, NOT_READY) in order to delay session
instantiation.
"""
logger.debug("emane setup")
# TODO: drive this from the session object
with self.session._objects_lock:
for node in self.session.objects.itervalues():
if nodeutils.is_node(node, NodeTypes.EMANE):
logger.debug("adding emane node: id(%s) name(%s)", node.objid, node.name)
self.add_node(node)
if not self._emane_nodes:
logger.debug("no emane nodes in session")
return EmaneManager.NOT_NEEDED
# control network bridge required for EMANE 0.9.2
# - needs to be configured before checkdistributed() for distributed
# - needs to exist when eventservice binds to it (initeventservice)
if self.session.master:
otadev = self.get_config("otamanagerdevice")
netidx = self.session.get_control_net_index(otadev)
logger.debug("emane ota manager device: index(%s) otadev(%s)", netidx, otadev)
if netidx < 0:
logger.error("EMANE cannot start, check core config. invalid OTA device provided: %s", otadev)
return EmaneManager.NOT_READY
ctrlnet = self.session.add_remove_control_net(net_index=netidx, remove=False, conf_required=False)
self.distributedctrlnet(ctrlnet)
eventdev = self.get_config("eventservicedevice")
logger.debug("emane event service device: eventdev(%s)", eventdev)
if eventdev != otadev:
netidx = self.session.get_control_net_index(eventdev)
logger.debug("emane event service device index: %s", netidx)
if netidx < 0:
logger.error("EMANE cannot start, check core config. invalid event service device: %s", eventdev)
return EmaneManager.NOT_READY
ctrlnet = self.session.add_remove_control_net(net_index=netidx, remove=False, conf_required=False)
self.distributedctrlnet(ctrlnet)
if self.checkdistributed():
# we are slave, but haven't received a platformid yet
platform_id_start = "platform_id_start"
default_values = self.emane_config.default_values()
value = self.get_config(platform_id_start)
if value == default_values[platform_id_start]:
return EmaneManager.NOT_READY
self.check_node_models()
return EmaneManager.SUCCESS
def startup(self):
"""
After all the EmaneNode objects have been added, build XML files
and start the daemons. Returns Emane.(SUCCESS, NOT_NEEDED, or
NOT_READY) which is used to delay session instantiation.
"""
self.reset()
r = self.setup()
# NOT_NEEDED or NOT_READY
if r != EmaneManager.SUCCESS:
return r
nems = []
with self._emane_node_lock:
self.buildxml()
self.initeventservice()
self.starteventmonitor()
if self.numnems() > 0:
self.startdaemons()
self.installnetifs()
for emane_node in self._emane_nodes.itervalues():
for netif in emane_node.netifs():
nems.append((netif.node.name, netif.name, emane_node.getnemid(netif)))
if nems:
emane_nems_filename = os.path.join(self.session.session_dir, "emane_nems")
try:
with open(emane_nems_filename, "w") as f:
for nodename, ifname, nemid in nems:
f.write("%s %s %s\n" % (nodename, ifname, nemid))
except IOError:
logger.exception("Error writing EMANE NEMs file: %s")
return EmaneManager.SUCCESS
def poststartup(self):
"""
Retransmit location events now that all NEMs are active.
"""
if not self.genlocationevents():
return
with self._emane_node_lock:
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
logger.debug("post startup for emane node: %s - %s", emane_node.objid, emane_node.name)
emane_node.model.post_startup()
for netif in emane_node.netifs():
x, y, z = netif.node.position.get()
emane_node.setnemposition(netif, x, y, z)
def reset(self):
"""
remove all EmaneNode objects from the dictionary,
reset port numbers and nem id counters
"""
with self._emane_node_lock:
self._emane_nodes.clear()
# don't clear self._ifccounts here; NEM counts are needed for buildxml
self.platformport = self.session.options.get_config_int("emane_platform_port", 8100)
self.transformport = self.session.options.get_config_int("emane_transform_port", 8200)
def shutdown(self):
"""
stop all EMANE daemons
"""
with self._ifccountslock:
self._ifccounts.clear()
with self._emane_node_lock:
if not self._emane_nodes:
return
logger.info("stopping EMANE daemons.")
self.deinstallnetifs()
self.stopdaemons()
self.stopeventmonitor()
def handledistributed(self, message):
"""
Broker handler for processing CORE API messages as they are
received. This is used to snoop the Link add messages to get NEM
counts of NEMs that exist on other servers.
"""
if message.message_type == MessageTypes.LINK.value and message.flags & MessageFlags.ADD.value:
nn = message.node_numbers()
# first node is always link layer node in Link add message
if nn[0] in self.session.broker.network_nodes:
serverlist = self.session.broker.getserversbynode(nn[1])
for server in serverlist:
with self._ifccountslock:
if server not in self._ifccounts:
self._ifccounts[server] = 1
else:
self._ifccounts[server] += 1
def checkdistributed(self):
"""
Check for EMANE nodes that exist on multiple emulation servers and
coordinate the NEM id and port number space.
If we are the master EMANE node, return False so initialization will
proceed as normal; otherwise slaves return True here and
initialization is deferred.
"""
# check with the session if we are the "master" Emane object?
master = False
with self._emane_node_lock:
if self._emane_nodes:
master = self.session.master
logger.info("emane check distributed as master: %s.", master)
# we are not the master Emane object, wait for nem id and ports
if not master:
return True
nemcount = 0
with self._emane_node_lock:
for key in self._emane_nodes:
emane_node = self._emane_nodes[key]
nemcount += emane_node.numnetif()
nemid = int(self.get_config("nem_id_start"))
nemid += nemcount
platformid = int(self.get_config("platform_id_start"))
# build an ordered list of servers so platform ID is deterministic
servers = []
for key in sorted(self._emane_nodes):
for server in self.session.broker.getserversbynode(key):
if server not in servers:
servers.append(server)
servers.sort(key=lambda x: x.name)
for server in servers:
if server.name == "localhost":
continue
if server.sock is None:
continue
platformid += 1
typeflags = ConfigFlags.UPDATE.value
self.set_config("platform_id_start", str(platformid))
self.set_config("nem_id_start", str(nemid))
config_data = ConfigShim.config_data(0, None, typeflags, self.emane_config, self.get_configs())
message = dataconversion.convert_config(config_data)
server.sock.send(message)
# increment nemid for next server by number of interfaces
with self._ifccountslock:
if server in self._ifccounts:
nemid += self._ifccounts[server]
return False
def buildxml(self):
"""
Build XML files required to run EMANE on each node.
NEMs run inside containers using the control network for passing
events and data.
"""
# assume self._objslock is already held here
logger.info("emane building xml...")
# on master, control network bridge added earlier in startup()
ctrlnet = self.session.add_remove_control_net(net_index=0, remove=False, conf_required=False)
self.buildplatformxml(ctrlnet)
self.buildnemxml()
self.buildeventservicexml()
# TODO: remove need for tlv messaging
def distributedctrlnet(self, ctrlnet):
"""
Distributed EMANE requires multiple control network prefixes to
be configured. This generates configuration for slave control nets
using the default list of prefixes.
"""
session = self.session
# slave server
if not session.master:
return
servers = session.broker.getservernames()
# not distributed
if len(servers) < 2:
return
prefix = session.options.get_config("controlnet")
prefixes = prefix.split()
# normal Config messaging will distribute controlnets
if len(prefixes) >= len(servers):
return
# this generates a config message having controlnet prefix assignments
logger.info("Setting up default controlnet prefixes for distributed (%d configured)" % len(prefixes))
prefixes = ctrlnet.DEFAULT_PREFIX_LIST[0]
vals = 'controlnet="%s"' % prefixes
tlvdata = ""
tlvdata += coreapi.CoreConfigTlv.pack(ConfigTlvs.OBJECT.value, "session")
tlvdata += coreapi.CoreConfigTlv.pack(ConfigTlvs.TYPE.value, 0)
tlvdata += coreapi.CoreConfigTlv.pack(ConfigTlvs.VALUES.value, vals)
rawmsg = coreapi.CoreConfMessage.pack(0, tlvdata)
msghdr = rawmsg[:coreapi.CoreMessage.header_len]
msg = coreapi.CoreConfMessage(flags=0, hdr=msghdr, data=rawmsg[coreapi.CoreMessage.header_len:])
self.session.broker.handle_message(msg)
def check_node_models(self):
"""
Associate EmaneModel classes with EmaneNode nodes. The model
configurations are stored in self.configs.
"""
for node_id in self._emane_nodes:
emane_node = self._emane_nodes[node_id]
logger.debug("checking emane model for node: %s", node_id)
# skip nodes that already have a model set
if emane_node.model:
logger.debug("node(%s) already has model(%s)", emane_node.objid, emane_node.model.name)
continue
# set model configured for node, due to legacy messaging configuration before nodes exist
model_name = self.node_models.get(node_id)
if not model_name:
logger.error("emane node(%s) has no node model", node_id)
raise ValueError("emane node has no model set")
config = self.get_model_config(node_id=node_id, model_name=model_name)
logger.debug("setting emane model(%s) config(%s)", model_name, config)
model_class = self.models[model_name]
emane_node.setmodel(model_class, config)
def nemlookup(self, nemid):
"""
Look for the given numerical NEM ID and return the first matching
EmaneNode and NEM interface.
"""
emane_node = None
netif = None
for node_id in self._emane_nodes:
emane_node = self._emane_nodes[node_id]
netif = emane_node.getnemnetif(nemid)
if netif is not None:
break
else:
emane_node = None
return emane_node, netif
def numnems(self):
"""
Return the number of NEMs emulated locally.
"""
count = 0
for emane_node in self._emane_nodes.itervalues():
count += len(emane_node.netifs())
return count
def buildplatformxml(self, ctrlnet):
"""
Build a platform.xml file now that all nodes are configured.
"""
nemid = int(self.get_config("nem_id_start"))
platform_xmls = {}
# assume self._objslock is already held here
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
nemid = emanexml.build_node_platform_xml(self, ctrlnet, emane_node, nemid, platform_xmls)
def buildnemxml(self):
"""
Builds the xxxnem.xml, xxxmac.xml, and xxxphy.xml files which
are defined on a per-EmaneNode basis.
"""
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
emanexml.build_xml_files(self, emane_node)
def buildtransportxml(self):
"""
Calls emanegentransportxml using a platform.xml file to build the transportdaemon*.xml.
"""
utils.check_cmd(["emanegentransportxml", "platform.xml"], cwd=self.session.session_dir)
def buildeventservicexml(self):
"""
Build the libemaneeventservice.xml file if event service options
were changed in the global config.
"""
need_xml = False
default_values = self.emane_config.default_values()
for name in ["eventservicegroup", "eventservicedevice"]:
a = default_values[name]
b = self.get_config(name)
if a != b:
need_xml = True
if not need_xml:
# reset to using default config
self.initeventservice()
return
try:
group, port = self.get_config("eventservicegroup").split(":")
except ValueError:
logger.exception("invalid eventservicegroup in EMANE config")
return
dev = self.get_config("eventservicedevice")
emanexml.create_event_service_xml(group, port, dev, self.session.session_dir)
def startdaemons(self):
"""
Start one EMANE daemon per node having a radio.
Add a control network even if the user has not configured one.
"""
logger.info("starting emane daemons...")
loglevel = str(EmaneManager.DEFAULT_LOG_LEVEL)
cfgloglevel = self.session.options.get_config_int("emane_log_level")
realtime = self.session.options.get_config_bool("emane_realtime", default=True)
if cfgloglevel:
logger.info("setting user-defined EMANE log level: %d", cfgloglevel)
loglevel = str(cfgloglevel)
emanecmd = ["emane", "-d", "-l", loglevel]
if realtime:
emanecmd += "-r",
otagroup, otaport = self.get_config("otamanagergroup").split(":")
otadev = self.get_config("otamanagerdevice")
otanetidx = self.session.get_control_net_index(otadev)
eventgroup, eventport = self.get_config("eventservicegroup").split(":")
eventdev = self.get_config("eventservicedevice")
eventservicenetidx = self.session.get_control_net_index(eventdev)
run_emane_on_host = False
for node in self.getnodes():
if hasattr(node, "transport_type") and node.transport_type == "raw":
run_emane_on_host = True
continue
path = self.session.session_dir
n = node.objid
# control network not yet started here
self.session.add_remove_control_interface(node, 0, remove=False, conf_required=False)
if otanetidx > 0:
logger.info("adding ota device ctrl%d", otanetidx)
self.session.add_remove_control_interface(node, otanetidx, remove=False, conf_required=False)
if eventservicenetidx >= 0:
logger.info("adding event service device ctrl%d", eventservicenetidx)
self.session.add_remove_control_interface(node, eventservicenetidx, remove=False, conf_required=False)
# multicast route is needed for OTA data
args = [constants.IP_BIN, "route", "add", otagroup, "dev", otadev]
node.check_cmd(args)
# multicast route is also needed for event data if on control network
if eventservicenetidx >= 0 and eventgroup != otagroup:
args = [constants.IP_BIN, "route", "add", eventgroup, "dev", eventdev]
node.check_cmd(args)
# start emane
args = emanecmd + ["-f", os.path.join(path, "emane%d.log" % n), os.path.join(path, "platform%d.xml" % n)]
output = node.check_cmd(args)
logger.info("node(%s) emane daemon running: %s", node.name, args)
logger.info("node(%s) emane daemon output: %s", node.name, output)
if not run_emane_on_host:
return
path = self.session.session_dir
emanecmd += ["-f", os.path.join(path, "emane.log")]
args = emanecmd + [os.path.join(path, "platform.xml")]
utils.check_cmd(args, cwd=path)
logger.info("host emane daemon running: %s", args)
def stopdaemons(self):
"""
Kill the appropriate EMANE daemons.
"""
# TODO: we may want to improve this if we had the PIDs from the specific EMANE daemons that we"ve started
args = ["killall", "-q", "emane"]
stop_emane_on_host = False
for node in self.getnodes():
if hasattr(node, "transport_type") and node.transport_type == "raw":
stop_emane_on_host = True
continue
if node.up:
node.cmd(args, wait=False)
# TODO: RJ45 node
if stop_emane_on_host:
try:
utils.check_cmd(args)
utils.check_cmd(["killall", "-q", "emanetransportd"])
except CoreCommandError:
logger.exception("error shutting down emane daemons")
def installnetifs(self):
"""
Install TUN/TAP virtual interfaces into their proper namespaces
now that the EMANE daemons are running.
"""
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
logger.info("emane install netifs for node: %d", key)
emane_node.installnetifs()
def deinstallnetifs(self):
"""
Uninstall TUN/TAP virtual interfaces.
"""
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
emane_node.deinstallnetifs()
def doeventmonitor(self):
"""
Returns boolean whether or not EMANE events will be monitored.
"""
# this support must be explicitly turned on; by default, CORE will
# generate the EMANE events when nodes are moved
return self.session.options.get_config_bool("emane_event_monitor")
def genlocationevents(self):
"""
Returns boolean whether or not EMANE events will be generated.
"""
# By default, CORE generates EMANE location events when nodes
# are moved; this can be explicitly disabled in core.conf
tmp = self.session.options.get_config_bool("emane_event_generate")
if tmp is None:
tmp = not self.doeventmonitor()
return tmp
def starteventmonitor(self):
"""
Start monitoring EMANE location events if configured to do so.
"""
logger.info("emane start event monitor")
if not self.doeventmonitor():
return
if self.service is None:
logger.error("Warning: EMANE events will not be generated "
"because the emaneeventservice\n binding was "
"unable to load "
"(install the python-emaneeventservice bindings)")
return
self.doeventloop = True
self.eventmonthread = threading.Thread(target=self.eventmonitorloop)
self.eventmonthread.daemon = True
self.eventmonthread.start()
def stopeventmonitor(self):
"""
Stop monitoring EMANE location events.
"""
self.doeventloop = False
if self.service is not None:
self.service.breakloop()
# reset the service, otherwise nextEvent won"t work
self.initeventservice(shutdown=True)
if self.eventmonthread is not None:
# TODO: fix this
self.eventmonthread._Thread__stop()
self.eventmonthread.join()
self.eventmonthread = None
def eventmonitorloop(self):
"""
Thread target that monitors EMANE location events.
"""
if self.service is None:
return
logger.info("subscribing to EMANE location events. (%s)", threading.currentThread().getName())
while self.doeventloop is True:
uuid, seq, events = self.service.nextEvent()
# this occurs with 0.9.1 event service
if not self.doeventloop:
break
for event in events:
nem, eid, data = event
if eid == LocationEvent.IDENTIFIER:
self.handlelocationevent(nem, eid, data)
logger.info("unsubscribing from EMANE location events. (%s)", threading.currentThread().getName())
def handlelocationevent(self, rxnemid, eid, data):
"""
Handle an EMANE location event.
"""
events = LocationEvent()
events.restore(data)
for event in events:
txnemid, attrs = event
if "latitude" not in attrs or "longitude" not in attrs or "altitude" not in attrs:
logger.warn("dropped invalid location event")
continue
# yaw,pitch,roll,azimuth,elevation,velocity are unhandled
lat = attrs["latitude"]
lon = attrs["longitude"]
alt = attrs["altitude"]
logger.debug("emane location event: %s,%s,%s", lat, lon, alt)
self.handlelocationeventtoxyz(txnemid, lat, lon, alt)
def handlelocationeventtoxyz(self, nemid, lat, lon, alt):
"""
Convert the (NEM ID, lat, long, alt) from a received location event
into a node and x,y,z coordinate values, sending a Node Message.
Returns True if successfully parsed and a Node Message was sent.
"""
# convert nemid to node number
emanenode, netif = self.nemlookup(nemid)
if netif is None:
logger.info("location event for unknown NEM %s", nemid)
return False
n = netif.node.objid
# convert from lat/long/alt to x,y,z coordinates
x, y, z = self.session.location.getxyz(lat, lon, alt)
x = int(x)
y = int(y)
z = int(z)
logger.info("location event NEM %s (%s, %s, %s) -> (%s, %s, %s)", nemid, lat, lon, alt, x, y, z)
xbit_check = x.bit_length() > 16 or x < 0
ybit_check = y.bit_length() > 16 or y < 0
zbit_check = z.bit_length() > 16 or z < 0
if any([xbit_check, ybit_check, zbit_check]):
logger.error("Unable to build node location message, received lat/long/alt exceeds coordinate "
"space: NEM %s (%d, %d, %d)", nemid, x, y, z)
return False
# generate a node message for this location update
try:
node = self.session.get_object(n)
except KeyError:
logger.exception("location event NEM %s has no corresponding node %s" % (nemid, n))
return False
# don"t use node.setposition(x,y,z) which generates an event
node.position.set(x, y, z)
node_data = node.data(message_type=0, lat=str(lat), lon=str(lon), alt=str(alt))
self.session.broadcast_node(node_data)
return True
def emanerunning(self, node):
"""
Return True if an EMANE process associated with the given node is running, False otherwise.
"""
args = ["pkill", "-0", "-x", "emane"]
status = node.cmd(args)
return status == 0
class EmaneManager(ConfigurableManager):
"""
EMANE controller object. Lives in a Session instance and is used for
building EMANE config files from all of the EmaneNode objects in this
emulation, and for controlling the EMANE daemons.
"""
name = "emane"
config_type = RegisterTlvs.EMULATION_SERVER.value
_hwaddr_prefix = "02:02"
SUCCESS, NOT_NEEDED, NOT_READY = (0, 1, 2)
EVENTCFGVAR = "LIBEMANEEVENTSERVICECONFIG"
DEFAULT_LOG_LEVEL = 3
def __init__(self, session):
"""
Creates a Emane instance.
:param core.session.Session session: session this manager is tied to
:return: nothing
"""
ConfigurableManager.__init__(self)
self.session = session
self._emane_nodes = {}
self._emane_node_lock = threading.Lock()
self._ifccounts = {}
self._ifccountslock = threading.Lock()
# Port numbers are allocated from these counters
self.platformport = self.session.get_config_item_int(
"emane_platform_port", 8100)
self.transformport = self.session.get_config_item_int(
"emane_transform_port", 8200)
self.doeventloop = False
self.eventmonthread = None
# model for global EMANE configuration options
self.emane_config = EmaneGlobalModel(session, None)
session.broker.handlers.add(self.handledistributed)
self.service = None
self.event_device = None
self._modelclsmap = {self.emane_config.name: self.emane_config}
self.service = None
self.emane_check()
def emane_check(self):
"""
Check if emane is installed and load models.
:return: nothing
"""
try:
# check for emane
emane_version = utils.check_cmd(["emane", "--version"])
logger.info("using EMANE: %s", emane_version)
# load default emane models
self.load_models(EMANE_MODELS)
# load custom models
custom_models_path = self.session.config.get("emane_models_dir")
if custom_models_path:
emane_models = utils.load_classes(custom_models_path,
EmaneModel)
self.load_models(emane_models)
except CoreCommandError:
logger.info("emane is not installed")
def deleteeventservice(self):
if self.service:
for fd in self.service._readFd, self.service._writeFd:
if fd >= 0:
os.close(fd)
for f in self.service._socket, self.service._socketOTA:
if f:
f.close()
self.service = None
self.event_device = None
def initeventservice(self, filename=None, shutdown=False):
"""
Re-initialize the EMANE Event service.
The multicast group and/or port may be configured.
"""
self.deleteeventservice()
if shutdown:
return
# Get the control network to be used for events
values = self.getconfig(None, "emane",
self.emane_config.getdefaultvalues())[1]
group, port = self.emane_config.valueof("eventservicegroup",
values).split(":")
self.event_device = self.emane_config.valueof("eventservicedevice",
values)
eventnetidx = self.session.get_control_net_index(self.event_device)
if eventnetidx < 0:
logger.error("invalid emane event service device provided: %s",
self.event_device)
return False
# make sure the event control network is in place
eventnet = self.session.add_remove_control_net(net_index=eventnetidx,
remove=False,
conf_required=False)
if eventnet is not None:
# direct EMANE events towards control net bridge
self.event_device = eventnet.brname
eventchannel = (group, int(port), self.event_device)
# disabled otachannel for event service
# only needed for e.g. antennaprofile events xmit by models
logger.info("using %s for event service traffic", self.event_device)
try:
self.service = EventService(eventchannel=eventchannel,
otachannel=None)
except EventServiceException:
logger.exception("error instantiating emane EventService")
return True
def load_models(self, emane_models):
"""
load EMANE models and make them available.
"""
for emane_model in emane_models:
logger.info("loading emane model: %s", emane_model.__name__)
self._modelclsmap[emane_model.name] = emane_model
self.session.add_config_object(emane_model.name,
emane_model.config_type,
emane_model.configure_emane)
def add_node(self, emane_node):
"""
Add a new EmaneNode object to this Emane controller object
:param core.emane.nodes.EmaneNode emane_node: emane node to add
:return: nothing
"""
with self._emane_node_lock:
if emane_node.objid in self._emane_nodes:
raise KeyError("non-unique EMANE object id %s for %s" %
(emane_node.objid, emane_node))
self._emane_nodes[emane_node.objid] = emane_node
def getnodes(self):
"""
Return a set of CoreNodes that are linked to an EmaneNode,
e.g. containers having one or more radio interfaces.
"""
# assumes self._objslock already held
nodes = set()
for emane_node in self._emane_nodes.values():
for netif in emane_node.netifs():
nodes.add(netif.node)
return nodes
def getmodels(self, n):
"""
Used with XML export; see ConfigurableManager.getmodels()
"""
r = ConfigurableManager.getmodels(self, n)
# EMANE global params are stored with first EMANE node (if non-default
# values are configured)
sorted_ids = sorted(self.configs.keys())
if None in self.configs and len(
sorted_ids) > 1 and n.objid == sorted_ids[1]:
v = self.configs[None]
for model in v:
cls = self._modelclsmap[model[0]]
vals = model[1]
r.append((cls, vals))
return r
def getifcconfig(self, nodenum, conftype, defaultvalues, ifc):
# use the network-wide config values or interface(NEM)-specific values?
if ifc is None:
return self.getconfig(nodenum, conftype, defaultvalues)[1]
else:
# don"t use default values when interface config is the same as net
# note here that using ifc.node.objid as key allows for only one type
# of each model per node;
# TODO: use both node and interface as key
# Adamson change: first check for iface config keyed by "node:ifc.name"
# (so that nodes w/ multiple interfaces of same conftype can have
# different configs for each separate interface)
key = 1000 * ifc.node.objid
if ifc.netindex is not None:
key += ifc.netindex
values = self.getconfig(key, conftype, None)[1]
if not values:
values = self.getconfig(ifc.node.objid, conftype, None)[1]
if not values and ifc.transport_type == "raw":
# with EMANE 0.9.2+, we need an extra NEM XML from
# model.buildnemxmlfiles(), so defaults are returned here
values = self.getconfig(nodenum, conftype, defaultvalues)[1]
return values
def setup(self):
"""
Populate self._objs with EmaneNodes; perform distributed setup;
associate models with EmaneNodes from self.config. Returns
Emane.(SUCCESS, NOT_NEEDED, NOT_READY) in order to delay session
instantiation.
"""
logger.debug("emane setup")
# TODO: drive this from the session object
with self.session._objects_lock:
for node in self.session.objects.itervalues():
if nodeutils.is_node(node, NodeTypes.EMANE):
logger.debug("adding emane node: id(%s) name(%s)",
node.objid, node.name)
self.add_node(node)
if not self._emane_nodes:
logger.debug("no emane nodes in session")
return EmaneManager.NOT_NEEDED
# control network bridge required for EMANE 0.9.2
# - needs to be configured before checkdistributed() for distributed
# - needs to exist when eventservice binds to it (initeventservice)
if self.session.master:
values = self.getconfig(None, self.emane_config.name,
self.emane_config.getdefaultvalues())[1]
logger.debug("emane config default values: %s", values)
otadev = self.emane_config.valueof("otamanagerdevice", values)
netidx = self.session.get_control_net_index(otadev)
logger.debug("emane ota manager device: index(%s) otadev(%s)",
netidx, otadev)
if netidx < 0:
logger.error(
"EMANE cannot start, check core config. invalid OTA device provided: %s",
otadev)
return EmaneManager.NOT_READY
ctrlnet = self.session.add_remove_control_net(net_index=netidx,
remove=False,
conf_required=False)
self.distributedctrlnet(ctrlnet)
eventdev = self.emane_config.valueof("eventservicedevice", values)
logger.debug("emane event service device: eventdev(%s)", eventdev)
if eventdev != otadev:
netidx = self.session.get_control_net_index(eventdev)
logger.debug("emane event service device index: %s", netidx)
if netidx < 0:
logger.error(
"EMANE cannot start, check core config. invalid event service device: %s",
eventdev)
return EmaneManager.NOT_READY
ctrlnet = self.session.add_remove_control_net(
net_index=netidx, remove=False, conf_required=False)
self.distributedctrlnet(ctrlnet)
if self.checkdistributed():
# we are slave, but haven"t received a platformid yet
cfgval = self.getconfig(None, self.emane_config.name,
self.emane_config.getdefaultvalues())[1]
i = self.emane_config.getnames().index("platform_id_start")
if cfgval[i] == self.emane_config.getdefaultvalues()[i]:
return EmaneManager.NOT_READY
self.setnodemodels()
return EmaneManager.SUCCESS
def startup(self):
"""
After all the EmaneNode objects have been added, build XML files
and start the daemons. Returns Emane.(SUCCESS, NOT_NEEDED, or
NOT_READY) which is used to delay session instantiation.
"""
self.reset()
r = self.setup()
# NOT_NEEDED or NOT_READY
if r != EmaneManager.SUCCESS:
return r
nems = []
with self._emane_node_lock:
self.buildxml()
self.initeventservice()
self.starteventmonitor()
if self.numnems() > 0:
self.startdaemons()
self.installnetifs(do_netns=False)
for emane_node in self._emane_nodes.itervalues():
for netif in emane_node.netifs():
nems.append((netif.node.name, netif.name,
emane_node.getnemid(netif)))
if nems:
emane_nems_filename = os.path.join(self.session.session_dir,
"emane_nems")
try:
with open(emane_nems_filename, "w") as f:
for nodename, ifname, nemid in nems:
f.write("%s %s %s\n" % (nodename, ifname, nemid))
except IOError:
logger.exception("Error writing EMANE NEMs file: %s")
return EmaneManager.SUCCESS
def poststartup(self):
"""
Retransmit location events now that all NEMs are active.
"""
if not self.genlocationevents():
return
with self._emane_node_lock:
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
logger.debug("post startup for emane node: %s - %s",
emane_node.objid, emane_node.name)
emane_node.model.post_startup(self)
for netif in emane_node.netifs():
x, y, z = netif.node.position.get()
emane_node.setnemposition(netif, x, y, z)
def reset(self):
"""
remove all EmaneNode objects from the dictionary,
reset port numbers and nem id counters
"""
with self._emane_node_lock:
self._emane_nodes.clear()
# don"t clear self._ifccounts here; NEM counts are needed for buildxml
self.platformport = self.session.get_config_item_int(
"emane_platform_port", 8100)
self.transformport = self.session.get_config_item_int(
"emane_transform_port", 8200)
def shutdown(self):
"""
stop all EMANE daemons
"""
with self._ifccountslock:
self._ifccounts.clear()
with self._emane_node_lock:
if not self._emane_nodes:
return
logger.info("stopping EMANE daemons.")
self.deinstallnetifs()
self.stopdaemons()
self.stopeventmonitor()
def handledistributed(self, message):
"""
Broker handler for processing CORE API messages as they are
received. This is used to snoop the Link add messages to get NEM
counts of NEMs that exist on other servers.
"""
if message.message_type == MessageTypes.LINK.value and message.flags & MessageFlags.ADD.value:
nn = message.node_numbers()
# first node is always link layer node in Link add message
if nn[0] in self.session.broker.network_nodes:
serverlist = self.session.broker.getserversbynode(nn[1])
for server in serverlist:
with self._ifccountslock:
if server not in self._ifccounts:
self._ifccounts[server] = 1
else:
self._ifccounts[server] += 1
def checkdistributed(self):
"""
Check for EMANE nodes that exist on multiple emulation servers and
coordinate the NEM id and port number space.
If we are the master EMANE node, return False so initialization will
proceed as normal; otherwise slaves return True here and
initialization is deferred.
"""
# check with the session if we are the "master" Emane object?
master = False
with self._emane_node_lock:
if self._emane_nodes:
master = self.session.master
logger.info("emane check distributed as master: %s.", master)
# we are not the master Emane object, wait for nem id and ports
if not master:
return True
cfgval = self.getconfig(None, self.emane_config.name,
self.emane_config.getdefaultvalues())[1]
values = list(cfgval)
nemcount = 0
with self._emane_node_lock:
for key in self._emane_nodes:
emane_node = self._emane_nodes[key]
nemcount += emane_node.numnetif()
nemid = int(self.emane_config.valueof("nem_id_start", values))
nemid += nemcount
platformid = int(
self.emane_config.valueof("platform_id_start", values))
names = list(self.emane_config.getnames())
# build an ordered list of servers so platform ID is deterministic
servers = []
for key in sorted(self._emane_nodes):
for server in self.session.broker.getserversbynode(key):
if server not in servers:
servers.append(server)
servers.sort(key=lambda x: x.name)
for server in servers:
if server.name == "localhost":
continue
if server.sock is None:
continue
platformid += 1
typeflags = ConfigFlags.UPDATE.value
values[names.index("platform_id_start")] = str(platformid)
values[names.index("nem_id_start")] = str(nemid)
msg = EmaneGlobalModel.config_data(flags=0,
node_id=None,
type_flags=typeflags,
values=values)
server.sock.send(msg)
# increment nemid for next server by number of interfaces
with self._ifccountslock:
if server in self._ifccounts:
nemid += self._ifccounts[server]
return False
def buildxml(self):
"""
Build XML files required to run EMANE on each node.
NEMs run inside containers using the control network for passing
events and data.
"""
# assume self._objslock is already held here
logger.info("emane building xml...")
# on master, control network bridge added earlier in startup()
ctrlnet = self.session.add_remove_control_net(net_index=0,
remove=False,
conf_required=False)
self.buildplatformxml(ctrlnet)
self.buildnemxml()
self.buildeventservicexml()
def distributedctrlnet(self, ctrlnet):
"""
Distributed EMANE requires multiple control network prefixes to
be configured. This generates configuration for slave control nets
using the default list of prefixes.
"""
session = self.session
# slave server
if not session.master:
return
servers = session.broker.getservernames()
# not distributed
if len(servers) < 2:
return
prefix = session.config.get("controlnet")
prefix = getattr(session.options, "controlnet", prefix)
prefixes = prefix.split()
# normal Config messaging will distribute controlnets
if len(prefixes) >= len(servers):
return
# this generates a config message having controlnet prefix assignments
logger.info(
"Setting up default controlnet prefixes for distributed (%d configured)"
% len(prefixes))
prefixes = ctrlnet.DEFAULT_PREFIX_LIST[0]
vals = 'controlnet="%s"' % prefixes
tlvdata = ""
tlvdata += coreapi.CoreConfigTlv.pack(ConfigTlvs.OBJECT.value,
"session")
tlvdata += coreapi.CoreConfigTlv.pack(ConfigTlvs.TYPE.value, 0)
tlvdata += coreapi.CoreConfigTlv.pack(ConfigTlvs.VALUES.value, vals)
rawmsg = coreapi.CoreConfMessage.pack(0, tlvdata)
msghdr = rawmsg[:coreapi.CoreMessage.header_len]
msg = coreapi.CoreConfMessage(
flags=0, hdr=msghdr, data=rawmsg[coreapi.CoreMessage.header_len:])
self.session.broker.handle_message(msg)
def xmldoc(self, doctype):
"""
Returns an XML xml.minidom.Document with a DOCTYPE tag set to the
provided doctype string, and an initial element having the same
name.
"""
# we hack in the DOCTYPE using the parser
docstr = """<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE %s SYSTEM "file:///usr/share/emane/dtd/%s.dtd">
<%s/>""" % (doctype, doctype, doctype)
# normally this would be: doc = Document()
return parseString(docstr)
def xmlparam(self, doc, name, value):
"""
Convenience function for building a parameter tag of the format:
<param name="name" value="value" />
"""
p = doc.createElement("param")
p.setAttribute("name", name)
p.setAttribute("value", value)
return p
def xmlshimdefinition(self, doc, name):
"""
Convenience function for building a definition tag of the format:
<shim definition="name" />
"""
p = doc.createElement("shim")
p.setAttribute("definition", name)
return p
def xmlwrite(self, doc, filename):
"""
Write the given XML document to the specified filename.
"""
pathname = os.path.join(self.session.session_dir, filename)
with open(pathname, "w") as xml_file:
doc.writexml(writer=xml_file,
indent="",
addindent=" ",
newl="\n",
encoding="UTF-8")
def setnodemodels(self):
"""
Associate EmaneModel classes with EmaneNode nodes. The model
configurations are stored in self.configs.
"""
for key in self._emane_nodes:
self.setnodemodel(key)
def setnodemodel(self, key):
logger.debug("setting emane node model: %s", key)
emane_node = self._emane_nodes[key]
if key not in self.configs:
logger.debug("no emane node model configuration, leaving")
return False
for t, v in self.configs[key]:
logger.debug("configuration: key(%s) value(%s)", t, v)
if t is None:
continue
if t == self.emane_config.name:
continue
# only use the first valid EmaneModel
# convert model name to class (e.g. emane_rfpipe -> EmaneRfPipe)
cls = self._modelclsmap[t]
emane_node.setmodel(cls, v)
return True
# no model has been configured for this EmaneNode
return False
def nemlookup(self, nemid):
"""
Look for the given numerical NEM ID and return the first matching
EmaneNode and NEM interface.
"""
emane_node = None
netif = None
for key in self._emane_nodes:
emane_node = self._emane_nodes[key]
netif = emane_node.getnemnetif(nemid)
if netif is not None:
break
else:
emane_node = None
return emane_node, netif
def numnems(self):
"""
Return the number of NEMs emulated locally.
"""
count = 0
for emane_node in self._emane_nodes.itervalues():
count += len(emane_node.netifs())
return count
def newplatformxmldoc(self, values, otadev=None, eventdev=None):
"""
Start a new platform XML file. Use global EMANE config values
as keys. Override OTA manager and event service devices if
specified (in order to support Raw Transport).
"""
doc = self.xmldoc("platform")
plat = doc.getElementsByTagName("platform").pop()
names = list(self.emane_config.getnames())
platform_names = names[:len(self.emane_config.emulator_config)]
platform_names.remove("platform_id_start")
platform_values = list(values)
if otadev:
i = platform_names.index("otamanagerdevice")
platform_values[i] = otadev
if eventdev:
i = platform_names.index("eventservicedevice")
platform_values[i] = eventdev
# append all platform options (except starting id) to doc
for name in platform_names:
value = self.emane_config.valueof(name, platform_values)
param = self.xmlparam(doc, name, value)
plat.appendChild(param)
return doc
def buildplatformxml(self, ctrlnet):
"""
Build a platform.xml file now that all nodes are configured.
"""
values = self.getconfig(None, "emane",
self.emane_config.getdefaultvalues())[1]
nemid = int(self.emane_config.valueof("nem_id_start", values))
platformxmls = {}
# assume self._objslock is already held here
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
nems = emane_node.buildplatformxmlentry(self.xmldoc("platform"))
for netif in sorted(nems, key=lambda x: x.node.objid):
nementry = nems[netif]
nementry.setAttribute("id", "%d" % nemid)
key = netif.node.objid
if netif.transport_type == "raw":
key = "host"
otadev = ctrlnet.brname
eventdev = ctrlnet.brname
else:
otadev = None
eventdev = None
if key not in platformxmls:
platformxmls[key] = self.newplatformxmldoc(
values, otadev, eventdev)
doc = platformxmls[key]
plat = doc.getElementsByTagName("platform").pop()
plat.appendChild(nementry)
emane_node.setnemid(netif, nemid)
macstr = self._hwaddr_prefix + ":00:00:"
macstr += "%02X:%02X" % ((nemid >> 8) & 0xFF, nemid & 0xFF)
netif.sethwaddr(MacAddress.from_string(macstr))
nemid += 1
for key in sorted(platformxmls.keys()):
if key == "host":
self.xmlwrite(platformxmls["host"], "platform.xml")
continue
self.xmlwrite(platformxmls[key], "platform%d.xml" % key)
def buildnemxml(self):
"""
Builds the xxxnem.xml, xxxmac.xml, and xxxphy.xml files which
are defined on a per-EmaneNode basis.
"""
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
emane_node.build_xml_files(self)
def appendtransporttonem(self, doc, nem, nodenum, ifc=None):
"""
Given a nem XML node and EMANE WLAN node number, append
a <transport/> tag to the NEM definition, required for using
EMANE"s internal transport.
"""
emane_node = self._emane_nodes[nodenum]
transtag = doc.createElement("transport")
transtypestr = "virtual"
if ifc and ifc.transport_type == "raw":
transtypestr = "raw"
transtag.setAttribute("definition",
emane_node.transportxmlname(transtypestr))
nem.appendChild(transtag)
def buildtransportxml(self):
"""
Calls emanegentransportxml using a platform.xml file to build the transportdaemon*.xml.
"""
utils.check_cmd(["emanegentransportxml", "platform.xml"],
cwd=self.session.session_dir)
def buildeventservicexml(self):
"""
Build the libemaneeventservice.xml file if event service options
were changed in the global config.
"""
defaults = self.emane_config.getdefaultvalues()
values = self.getconfig(None, "emane",
self.emane_config.getdefaultvalues())[1]
need_xml = False
keys = ("eventservicegroup", "eventservicedevice")
for k in keys:
a = self.emane_config.valueof(k, defaults)
b = self.emane_config.valueof(k, values)
if a != b:
need_xml = True
if not need_xml:
# reset to using default config
self.initeventservice()
return
try:
group, port = self.emane_config.valueof("eventservicegroup",
values).split(":")
except ValueError:
logger.exception("invalid eventservicegroup in EMANE config")
return
dev = self.emane_config.valueof("eventservicedevice", values)
doc = self.xmldoc("emaneeventmsgsvc")
es = doc.getElementsByTagName("emaneeventmsgsvc").pop()
kvs = (("group", group), ("port", port), ("device", dev),
("mcloop", "1"), ("ttl", "32"))
xmlutils.add_text_elements_from_tuples(doc, es, kvs)
filename = "libemaneeventservice.xml"
self.xmlwrite(doc, filename)
pathname = os.path.join(self.session.session_dir, filename)
self.initeventservice(filename=pathname)
def startdaemons(self):
"""
Start one EMANE daemon per node having a radio.
Add a control network even if the user has not configured one.
"""
logger.info("starting emane daemons...")
loglevel = str(EmaneManager.DEFAULT_LOG_LEVEL)
cfgloglevel = self.session.get_config_item_int("emane_log_level")
realtime = self.session.get_config_item_bool("emane_realtime", True)
if cfgloglevel:
logger.info("setting user-defined EMANE log level: %d",
cfgloglevel)
loglevel = str(cfgloglevel)
emanecmd = ["emane", "-d", "-l", loglevel]
if realtime:
emanecmd += "-r",
values = self.getconfig(None, "emane",
self.emane_config.getdefaultvalues())[1]
otagroup, otaport = self.emane_config.valueof("otamanagergroup",
values).split(":")
otadev = self.emane_config.valueof("otamanagerdevice", values)
otanetidx = self.session.get_control_net_index(otadev)
eventgroup, eventport = self.emane_config.valueof(
"eventservicegroup", values).split(":")
eventdev = self.emane_config.valueof("eventservicedevice", values)
eventservicenetidx = self.session.get_control_net_index(eventdev)
run_emane_on_host = False
for node in self.getnodes():
if hasattr(node,
"transport_type") and node.transport_type == "raw":
run_emane_on_host = True
continue
path = self.session.session_dir
n = node.objid
# control network not yet started here
self.session.add_remove_control_interface(node,
0,
remove=False,
conf_required=False)
if otanetidx > 0:
logger.info("adding ota device ctrl%d", otanetidx)
self.session.add_remove_control_interface(node,
otanetidx,
remove=False,
conf_required=False)
if eventservicenetidx >= 0:
logger.info("adding event service device ctrl%d",
eventservicenetidx)
self.session.add_remove_control_interface(node,
eventservicenetidx,
remove=False,
conf_required=False)
# multicast route is needed for OTA data
args = [constants.IP_BIN, "route", "add", otagroup, "dev", otadev]
node.check_cmd(args)
# multicast route is also needed for event data if on control network
if eventservicenetidx >= 0 and eventgroup != otagroup:
args = [
constants.IP_BIN, "route", "add", eventgroup, "dev",
eventdev
]
node.check_cmd(args)
# start emane
args = emanecmd + [
"-f",
os.path.join(path, "emane%d.log" % n),
os.path.join(path, "platform%d.xml" % n)
]
output = node.check_cmd(args)
logger.info("node(%s) emane daemon running: %s", node.name, args)
logger.info("node(%s) emane daemon output: %s", node.name, output)
if not run_emane_on_host:
return
path = self.session.session_dir
emanecmd += ["-f", os.path.join(path, "emane.log")]
args = emanecmd + [os.path.join(path, "platform.xml")]
utils.check_cmd(args, cwd=path)
logger.info("host emane daemon running: %s", args)
def stopdaemons(self):
"""
Kill the appropriate EMANE daemons.
"""
# TODO: we may want to improve this if we had the PIDs from the specific EMANE daemons that we"ve started
args = ["killall", "-q", "emane"]
stop_emane_on_host = False
for node in self.getnodes():
if hasattr(node,
"transport_type") and node.transport_type == "raw":
stop_emane_on_host = True
continue
if node.up:
node.cmd(args, wait=False)
# TODO: RJ45 node
if stop_emane_on_host:
try:
utils.check_cmd(args)
utils.check_cmd(["killall", "-q", "emanetransportd"])
except CoreCommandError:
logger.exception("error shutting down emane daemons")
def installnetifs(self, do_netns=True):
"""
Install TUN/TAP virtual interfaces into their proper namespaces
now that the EMANE daemons are running.
"""
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
logger.info("emane install netifs for node: %d", key)
emane_node.installnetifs(do_netns)
def deinstallnetifs(self):
"""
Uninstall TUN/TAP virtual interfaces.
"""
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
emane_node.deinstallnetifs()
def configure(self, session, config_data):
"""
Handle configuration messages for global EMANE config.
:param core.conf.ConfigData config_data: configuration data for carrying out a configuration
"""
r = self.emane_config.configure_emane(session, config_data)
# extra logic to start slave Emane object after nemid has been configured from the master
config_type = config_data.type
if config_type == ConfigFlags.UPDATE.value and self.session.master is False:
# instantiation was previously delayed by self.setup()
# returning Emane.NOT_READY
self.session.instantiate()
return r
def doeventmonitor(self):
"""
Returns boolean whether or not EMANE events will be monitored.
"""
# this support must be explicitly turned on; by default, CORE will
# generate the EMANE events when nodes are moved
return self.session.get_config_item_bool("emane_event_monitor", False)
def genlocationevents(self):
"""
Returns boolean whether or not EMANE events will be generated.
"""
# By default, CORE generates EMANE location events when nodes
# are moved; this can be explicitly disabled in core.conf
tmp = self.session.get_config_item_bool("emane_event_generate")
if tmp is None:
tmp = not self.doeventmonitor()
return tmp
def starteventmonitor(self):
"""
Start monitoring EMANE location events if configured to do so.
"""
logger.info("emane start event monitor")
if not self.doeventmonitor():
return
if self.service is None:
errmsg = "Warning: EMANE events will not be generated " \
"because the emaneeventservice\n binding was " \
"unable to load " \
"(install the python-emaneeventservice bindings)"
logger.error(errmsg)
return
self.doeventloop = True
self.eventmonthread = threading.Thread(target=self.eventmonitorloop)
self.eventmonthread.daemon = True
self.eventmonthread.start()
def stopeventmonitor(self):
"""
Stop monitoring EMANE location events.
"""
self.doeventloop = False
if self.service is not None:
self.service.breakloop()
# reset the service, otherwise nextEvent won"t work
self.initeventservice(shutdown=True)
if self.eventmonthread is not None:
# TODO: fix this
self.eventmonthread._Thread__stop()
self.eventmonthread.join()
self.eventmonthread = None
def eventmonitorloop(self):
"""
Thread target that monitors EMANE location events.
"""
if self.service is None:
return
logger.info("subscribing to EMANE location events. (%s)",
threading.currentThread().getName())
while self.doeventloop is True:
uuid, seq, events = self.service.nextEvent()
# this occurs with 0.9.1 event service
if not self.doeventloop:
break
for event in events:
nem, eid, data = event
if eid == LocationEvent.IDENTIFIER:
self.handlelocationevent(nem, eid, data)
logger.info("unsubscribing from EMANE location events. (%s)",
threading.currentThread().getName())
def handlelocationevent(self, rxnemid, eid, data):
"""
Handle an EMANE location event.
"""
events = LocationEvent()
events.restore(data)
for event in events:
txnemid, attrs = event
if "latitude" not in attrs or "longitude" not in attrs or "altitude" not in attrs:
logger.warn("dropped invalid location event")
continue
# yaw,pitch,roll,azimuth,elevation,velocity are unhandled
lat = attrs["latitude"]
long = attrs["longitude"]
alt = attrs["altitude"]
self.handlelocationeventtoxyz(txnemid, lat, long, alt)
def handlelocationeventtoxyz(self, nemid, lat, lon, alt):
"""
Convert the (NEM ID, lat, long, alt) from a received location event
into a node and x,y,z coordinate values, sending a Node Message.
Returns True if successfully parsed and a Node Message was sent.
"""
# convert nemid to node number
emanenode, netif = self.nemlookup(nemid)
if netif is None:
logger.info("location event for unknown NEM %s", nemid)
return False
n = netif.node.objid
# convert from lat/long/alt to x,y,z coordinates
x, y, z = self.session.location.getxyz(lat, lon, alt)
x = int(x)
y = int(y)
z = int(z)
logger.info("location event NEM %s (%s, %s, %s) -> (%s, %s, %s)",
nemid, lat, lon, alt, x, y, z)
xbit_check = x.bit_length() > 16 or x < 0
ybit_check = y.bit_length() > 16 or y < 0
zbit_check = z.bit_length() > 16 or z < 0
if any([xbit_check, ybit_check, zbit_check]):
logger.error(
"Unable to build node location message, received lat/long/alt exceeds coordinate "
"space: NEM %s (%d, %d, %d)", nemid, x, y, z)
return False
# generate a node message for this location update
try:
node = self.session.get_object(n)
except KeyError:
logger.exception(
"location event NEM %s has no corresponding node %s" %
(nemid, n))
return False
# don"t use node.setposition(x,y,z) which generates an event
node.position.set(x, y, z)
node_data = node.data(message_type=0, lat=lat, lon=lon, alt=alt)
self.session.broadcast_node(node_data)
return True
def emanerunning(self, node):
"""
Return True if an EMANE process associated with the given node is running, False otherwise.
"""
args = ["pkill", "-0", "-x", "emane"]
status = node.cmd(args)
return status == 0
class EmaneManager(ModelManager):
"""
EMANE controller object. Lives in a Session instance and is used for
building EMANE config files from all of the EmaneNode objects in this
emulation, and for controlling the EMANE daemons.
"""
name = "emane"
config_type = RegisterTlvs.EMULATION_SERVER.value
SUCCESS, NOT_NEEDED, NOT_READY = (0, 1, 2)
EVENTCFGVAR = "LIBEMANEEVENTSERVICECONFIG"
DEFAULT_LOG_LEVEL = 3
def __init__(self, session):
"""
Creates a Emane instance.
:param core.session.Session session: session this manager is tied to
:return: nothing
"""
super(EmaneManager, self).__init__()
self.session = session
self._emane_nodes = {}
self._emane_node_lock = threading.Lock()
self._ifccounts = {}
self._ifccountslock = threading.Lock()
# port numbers are allocated from these counters
self.platformport = self.session.options.get_config_int(
"emane_platform_port", 8100)
self.transformport = self.session.options.get_config_int(
"emane_transform_port", 8200)
self.doeventloop = False
self.eventmonthread = None
# model for global EMANE configuration options
self.emane_config = EmaneGlobalModel(session)
self.set_configs(self.emane_config.default_values())
session.broker.handlers.add(self.handledistributed)
self.service = None
self.event_device = None
self.emane_check()
def getifcconfig(self, node_id, interface, model_name):
"""
Retrieve interface configuration or node configuration if not provided.
:param int node_id: node id
:param interface: node interface
:param str model_name: model to get configuration for
:return: node/interface model configuration
:rtype: dict
"""
# use the network-wide config values or interface(NEM)-specific values?
if interface is None:
return self.get_configs(node_id=node_id, config_type=model_name)
else:
# don"t use default values when interface config is the same as net
# note here that using ifc.node.objid as key allows for only one type
# of each model per node;
# TODO: use both node and interface as key
# Adamson change: first check for iface config keyed by "node:ifc.name"
# (so that nodes w/ multiple interfaces of same conftype can have
# different configs for each separate interface)
key = 1000 * interface.node.objid
if interface.netindex is not None:
key += interface.netindex
# try retrieve interface specific configuration, avoid getting defaults
config = self.get_configs(node_id=key, config_type=model_name)
# otherwise retrieve the interfaces node configuration, avoid using defaults
if not config:
config = self.get_configs(node_id=interface.node.objid,
config_type=model_name)
# get non interface config, when none found
if not config:
# with EMANE 0.9.2+, we need an extra NEM XML from
# model.buildnemxmlfiles(), so defaults are returned here
config = self.get_configs(node_id=node_id,
config_type=model_name)
return config
def config_reset(self, node_id=None):
super(EmaneManager, self).config_reset(node_id)
self.set_configs(self.emane_config.default_values())
def emane_check(self):
"""
Check if emane is installed and load models.
:return: nothing
"""
try:
# check for emane
emane_version = utils.check_cmd(["emane", "--version"])
logger.info("using EMANE: %s", emane_version)
# load default emane models
self.load_models(EMANE_MODELS)
# load custom models
custom_models_path = self.session.options.get_config(
"emane_models_dir")
if custom_models_path:
emane_models = utils.load_classes(custom_models_path,
EmaneModel)
self.load_models(emane_models)
except CoreCommandError:
logger.info("emane is not installed")
def deleteeventservice(self):
if self.service:
for fd in self.service._readFd, self.service._writeFd:
if fd >= 0:
os.close(fd)
for f in self.service._socket, self.service._socketOTA:
if f:
f.close()
self.service = None
self.event_device = None
def initeventservice(self, filename=None, shutdown=False):
"""
Re-initialize the EMANE Event service.
The multicast group and/or port may be configured.
"""
self.deleteeventservice()
if shutdown:
return
# Get the control network to be used for events
group, port = self.get_config("eventservicegroup").split(":")
self.event_device = self.get_config("eventservicedevice")
eventnetidx = self.session.get_control_net_index(self.event_device)
if eventnetidx < 0:
logger.error("invalid emane event service device provided: %s",
self.event_device)
return False
# make sure the event control network is in place
eventnet = self.session.add_remove_control_net(net_index=eventnetidx,
remove=False,
conf_required=False)
if eventnet is not None:
# direct EMANE events towards control net bridge
self.event_device = eventnet.brname
eventchannel = (group, int(port), self.event_device)
# disabled otachannel for event service
# only needed for e.g. antennaprofile events xmit by models
logger.info("using %s for event service traffic", self.event_device)
try:
self.service = EventService(eventchannel=eventchannel,
otachannel=None)
except EventServiceException:
logger.exception("error instantiating emane EventService")
return True
def load_models(self, emane_models):
"""
Load EMANE models and make them available.
"""
for emane_model in emane_models:
logger.info("loading emane model: %s", emane_model.__name__)
self.models[emane_model.name] = emane_model
def add_node(self, emane_node):
"""
Add a new EmaneNode object to this Emane controller object
:param core.emane.nodes.EmaneNode emane_node: emane node to add
:return: nothing
"""
with self._emane_node_lock:
if emane_node.objid in self._emane_nodes:
raise KeyError("non-unique EMANE object id %s for %s" %
(emane_node.objid, emane_node))
self._emane_nodes[emane_node.objid] = emane_node
def getnodes(self):
"""
Return a set of CoreNodes that are linked to an EmaneNode,
e.g. containers having one or more radio interfaces.
"""
# assumes self._objslock already held
nodes = set()
for emane_node in self._emane_nodes.values():
for netif in emane_node.netifs():
nodes.add(netif.node)
return nodes
def setup(self):
"""
Populate self._objs with EmaneNodes; perform distributed setup;
associate models with EmaneNodes from self.config. Returns
Emane.(SUCCESS, NOT_NEEDED, NOT_READY) in order to delay session
instantiation.
"""
logger.debug("emane setup")
# TODO: drive this from the session object
with self.session._objects_lock:
for node in self.session.objects.itervalues():
if nodeutils.is_node(node, NodeTypes.EMANE):
logger.debug("adding emane node: id(%s) name(%s)",
node.objid, node.name)
self.add_node(node)
if not self._emane_nodes:
logger.debug("no emane nodes in session")
return EmaneManager.NOT_NEEDED
# control network bridge required for EMANE 0.9.2
# - needs to be configured before checkdistributed() for distributed
# - needs to exist when eventservice binds to it (initeventservice)
if self.session.master:
otadev = self.get_config("otamanagerdevice")
netidx = self.session.get_control_net_index(otadev)
logger.debug("emane ota manager device: index(%s) otadev(%s)",
netidx, otadev)
if netidx < 0:
logger.error(
"EMANE cannot start, check core config. invalid OTA device provided: %s",
otadev)
return EmaneManager.NOT_READY
ctrlnet = self.session.add_remove_control_net(net_index=netidx,
remove=False,
conf_required=False)
self.distributedctrlnet(ctrlnet)
eventdev = self.get_config("eventservicedevice")
logger.debug("emane event service device: eventdev(%s)", eventdev)
if eventdev != otadev:
netidx = self.session.get_control_net_index(eventdev)
logger.debug("emane event service device index: %s", netidx)
if netidx < 0:
logger.error(
"EMANE cannot start, check core config. invalid event service device: %s",
eventdev)
return EmaneManager.NOT_READY
ctrlnet = self.session.add_remove_control_net(
net_index=netidx, remove=False, conf_required=False)
self.distributedctrlnet(ctrlnet)
if self.checkdistributed():
# we are slave, but haven't received a platformid yet
platform_id_start = "platform_id_start"
default_values = self.emane_config.default_values()
value = self.get_config(platform_id_start)
if value == default_values[platform_id_start]:
return EmaneManager.NOT_READY
self.check_node_models()
return EmaneManager.SUCCESS
def startup(self):
"""
After all the EmaneNode objects have been added, build XML files
and start the daemons. Returns Emane.(SUCCESS, NOT_NEEDED, or
NOT_READY) which is used to delay session instantiation.
"""
self.reset()
r = self.setup()
# NOT_NEEDED or NOT_READY
if r != EmaneManager.SUCCESS:
return r
nems = []
with self._emane_node_lock:
self.buildxml()
self.initeventservice()
self.starteventmonitor()
if self.numnems() > 0:
self.startdaemons()
self.installnetifs()
for emane_node in self._emane_nodes.itervalues():
for netif in emane_node.netifs():
nems.append((netif.node.name, netif.name,
emane_node.getnemid(netif)))
if nems:
emane_nems_filename = os.path.join(self.session.session_dir,
"emane_nems")
try:
with open(emane_nems_filename, "w") as f:
for nodename, ifname, nemid in nems:
f.write("%s %s %s\n" % (nodename, ifname, nemid))
except IOError:
logger.exception("Error writing EMANE NEMs file: %s")
return EmaneManager.SUCCESS
def poststartup(self):
"""
Retransmit location events now that all NEMs are active.
"""
if not self.genlocationevents():
return
with self._emane_node_lock:
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
logger.debug("post startup for emane node: %s - %s",
emane_node.objid, emane_node.name)
emane_node.model.post_startup()
for netif in emane_node.netifs():
x, y, z = netif.node.position.get()
emane_node.setnemposition(netif, x, y, z)
def reset(self):
"""
remove all EmaneNode objects from the dictionary,
reset port numbers and nem id counters
"""
with self._emane_node_lock:
self._emane_nodes.clear()
# don't clear self._ifccounts here; NEM counts are needed for buildxml
self.platformport = self.session.options.get_config_int(
"emane_platform_port", 8100)
self.transformport = self.session.options.get_config_int(
"emane_transform_port", 8200)
def shutdown(self):
"""
stop all EMANE daemons
"""
with self._ifccountslock:
self._ifccounts.clear()
with self._emane_node_lock:
if not self._emane_nodes:
return
logger.info("stopping EMANE daemons.")
self.deinstallnetifs()
self.stopdaemons()
self.stopeventmonitor()
def handledistributed(self, message):
"""
Broker handler for processing CORE API messages as they are
received. This is used to snoop the Link add messages to get NEM
counts of NEMs that exist on other servers.
"""
if message.message_type == MessageTypes.LINK.value and message.flags & MessageFlags.ADD.value:
nn = message.node_numbers()
# first node is always link layer node in Link add message
if nn[0] in self.session.broker.network_nodes:
serverlist = self.session.broker.getserversbynode(nn[1])
for server in serverlist:
with self._ifccountslock:
if server not in self._ifccounts:
self._ifccounts[server] = 1
else:
self._ifccounts[server] += 1
def checkdistributed(self):
"""
Check for EMANE nodes that exist on multiple emulation servers and
coordinate the NEM id and port number space.
If we are the master EMANE node, return False so initialization will
proceed as normal; otherwise slaves return True here and
initialization is deferred.
"""
# check with the session if we are the "master" Emane object?
master = False
with self._emane_node_lock:
if self._emane_nodes:
master = self.session.master
logger.info("emane check distributed as master: %s.", master)
# we are not the master Emane object, wait for nem id and ports
if not master:
return True
nemcount = 0
with self._emane_node_lock:
for key in self._emane_nodes:
emane_node = self._emane_nodes[key]
nemcount += emane_node.numnetif()
nemid = int(self.get_config("nem_id_start"))
nemid += nemcount
platformid = int(self.get_config("platform_id_start"))
# build an ordered list of servers so platform ID is deterministic
servers = []
for key in sorted(self._emane_nodes):
for server in self.session.broker.getserversbynode(key):
if server not in servers:
servers.append(server)
servers.sort(key=lambda x: x.name)
for server in servers:
if server.name == "localhost":
continue
if server.sock is None:
continue
platformid += 1
typeflags = ConfigFlags.UPDATE.value
self.set_config("platform_id_start", str(platformid))
self.set_config("nem_id_start", str(nemid))
config_data = ConfigShim.config_data(0, None, typeflags,
self.emane_config,
self.get_configs())
message = dataconversion.convert_config(config_data)
server.sock.send(message)
# increment nemid for next server by number of interfaces
with self._ifccountslock:
if server in self._ifccounts:
nemid += self._ifccounts[server]
return False
def buildxml(self):
"""
Build XML files required to run EMANE on each node.
NEMs run inside containers using the control network for passing
events and data.
"""
# assume self._objslock is already held here
logger.info("emane building xml...")
# on master, control network bridge added earlier in startup()
ctrlnet = self.session.add_remove_control_net(net_index=0,
remove=False,
conf_required=False)
self.buildplatformxml(ctrlnet)
self.buildnemxml()
self.buildeventservicexml()
# TODO: remove need for tlv messaging
def distributedctrlnet(self, ctrlnet):
"""
Distributed EMANE requires multiple control network prefixes to
be configured. This generates configuration for slave control nets
using the default list of prefixes.
"""
session = self.session
# slave server
if not session.master:
return
servers = session.broker.getservernames()
# not distributed
if len(servers) < 2:
return
prefix = session.options.get_config("controlnet")
prefixes = prefix.split()
# normal Config messaging will distribute controlnets
if len(prefixes) >= len(servers):
return
# this generates a config message having controlnet prefix assignments
logger.info(
"Setting up default controlnet prefixes for distributed (%d configured)"
% len(prefixes))
prefixes = ctrlnet.DEFAULT_PREFIX_LIST[0]
vals = 'controlnet="%s"' % prefixes
tlvdata = ""
tlvdata += coreapi.CoreConfigTlv.pack(ConfigTlvs.OBJECT.value,
"session")
tlvdata += coreapi.CoreConfigTlv.pack(ConfigTlvs.TYPE.value, 0)
tlvdata += coreapi.CoreConfigTlv.pack(ConfigTlvs.VALUES.value, vals)
rawmsg = coreapi.CoreConfMessage.pack(0, tlvdata)
msghdr = rawmsg[:coreapi.CoreMessage.header_len]
msg = coreapi.CoreConfMessage(
flags=0, hdr=msghdr, data=rawmsg[coreapi.CoreMessage.header_len:])
self.session.broker.handle_message(msg)
def check_node_models(self):
"""
Associate EmaneModel classes with EmaneNode nodes. The model
configurations are stored in self.configs.
"""
for node_id in self._emane_nodes:
emane_node = self._emane_nodes[node_id]
logger.debug("checking emane model for node: %s", node_id)
# skip nodes that already have a model set
if emane_node.model:
logger.debug("node(%s) already has model(%s)",
emane_node.objid, emane_node.model.name)
continue
# set model configured for node, due to legacy messaging configuration before nodes exist
model_name = self.node_models.get(node_id)
if not model_name:
logger.error("emane node(%s) has no node model", node_id)
raise ValueError("emane node has no model set")
config = self.get_model_config(node_id=node_id,
model_name=model_name)
logger.debug("setting emane model(%s) config(%s)", model_name,
config)
model_class = self.models[model_name]
emane_node.setmodel(model_class, config)
def nemlookup(self, nemid):
"""
Look for the given numerical NEM ID and return the first matching
EmaneNode and NEM interface.
"""
emane_node = None
netif = None
for node_id in self._emane_nodes:
emane_node = self._emane_nodes[node_id]
netif = emane_node.getnemnetif(nemid)
if netif is not None:
break
else:
emane_node = None
return emane_node, netif
def numnems(self):
"""
Return the number of NEMs emulated locally.
"""
count = 0
for emane_node in self._emane_nodes.itervalues():
count += len(emane_node.netifs())
return count
def buildplatformxml(self, ctrlnet):
"""
Build a platform.xml file now that all nodes are configured.
"""
nemid = int(self.get_config("nem_id_start"))
platform_xmls = {}
# assume self._objslock is already held here
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
nemid = emanexml.build_node_platform_xml(self, ctrlnet, emane_node,
nemid, platform_xmls)
def buildnemxml(self):
"""
Builds the xxxnem.xml, xxxmac.xml, and xxxphy.xml files which
are defined on a per-EmaneNode basis.
"""
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
emanexml.build_xml_files(self, emane_node)
def buildtransportxml(self):
"""
Calls emanegentransportxml using a platform.xml file to build the transportdaemon*.xml.
"""
utils.check_cmd(["emanegentransportxml", "platform.xml"],
cwd=self.session.session_dir)
def buildeventservicexml(self):
"""
Build the libemaneeventservice.xml file if event service options
were changed in the global config.
"""
need_xml = False
default_values = self.emane_config.default_values()
for name in ["eventservicegroup", "eventservicedevice"]:
a = default_values[name]
b = self.get_config(name)
if a != b:
need_xml = True
if not need_xml:
# reset to using default config
self.initeventservice()
return
try:
group, port = self.get_config("eventservicegroup").split(":")
except ValueError:
logger.exception("invalid eventservicegroup in EMANE config")
return
dev = self.get_config("eventservicedevice")
emanexml.create_event_service_xml(group, port, dev,
self.session.session_dir)
def startdaemons(self):
"""
Start one EMANE daemon per node having a radio.
Add a control network even if the user has not configured one.
"""
logger.info("starting emane daemons...")
loglevel = str(EmaneManager.DEFAULT_LOG_LEVEL)
cfgloglevel = self.session.options.get_config_int("emane_log_level")
realtime = self.session.options.get_config_bool("emane_realtime",
default=True)
if cfgloglevel:
logger.info("setting user-defined EMANE log level: %d",
cfgloglevel)
loglevel = str(cfgloglevel)
emanecmd = ["emane", "-d", "-l", loglevel]
if realtime:
emanecmd += "-r",
otagroup, otaport = self.get_config("otamanagergroup").split(":")
otadev = self.get_config("otamanagerdevice")
otanetidx = self.session.get_control_net_index(otadev)
eventgroup, eventport = self.get_config("eventservicegroup").split(":")
eventdev = self.get_config("eventservicedevice")
eventservicenetidx = self.session.get_control_net_index(eventdev)
run_emane_on_host = False
for node in self.getnodes():
if hasattr(node,
"transport_type") and node.transport_type == "raw":
run_emane_on_host = True
continue
path = self.session.session_dir
n = node.objid
# control network not yet started here
self.session.add_remove_control_interface(node,
0,
remove=False,
conf_required=False)
if otanetidx > 0:
logger.info("adding ota device ctrl%d", otanetidx)
self.session.add_remove_control_interface(node,
otanetidx,
remove=False,
conf_required=False)
if eventservicenetidx >= 0:
logger.info("adding event service device ctrl%d",
eventservicenetidx)
self.session.add_remove_control_interface(node,
eventservicenetidx,
remove=False,
conf_required=False)
# multicast route is needed for OTA data
args = [constants.IP_BIN, "route", "add", otagroup, "dev", otadev]
node.check_cmd(args)
# multicast route is also needed for event data if on control network
if eventservicenetidx >= 0 and eventgroup != otagroup:
args = [
constants.IP_BIN, "route", "add", eventgroup, "dev",
eventdev
]
node.check_cmd(args)
# start emane
args = emanecmd + [
"-f",
os.path.join(path, "emane%d.log" % n),
os.path.join(path, "platform%d.xml" % n)
]
output = node.check_cmd(args)
logger.info("node(%s) emane daemon running: %s", node.name, args)
logger.info("node(%s) emane daemon output: %s", node.name, output)
if not run_emane_on_host:
return
path = self.session.session_dir
emanecmd += ["-f", os.path.join(path, "emane.log")]
args = emanecmd + [os.path.join(path, "platform.xml")]
utils.check_cmd(args, cwd=path)
logger.info("host emane daemon running: %s", args)
def stopdaemons(self):
"""
Kill the appropriate EMANE daemons.
"""
# TODO: we may want to improve this if we had the PIDs from the specific EMANE daemons that we"ve started
args = ["killall", "-q", "emane"]
stop_emane_on_host = False
for node in self.getnodes():
if hasattr(node,
"transport_type") and node.transport_type == "raw":
stop_emane_on_host = True
continue
if node.up:
node.cmd(args, wait=False)
# TODO: RJ45 node
if stop_emane_on_host:
try:
utils.check_cmd(args)
utils.check_cmd(["killall", "-q", "emanetransportd"])
except CoreCommandError:
logger.exception("error shutting down emane daemons")
def installnetifs(self):
"""
Install TUN/TAP virtual interfaces into their proper namespaces
now that the EMANE daemons are running.
"""
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
logger.info("emane install netifs for node: %d", key)
emane_node.installnetifs()
def deinstallnetifs(self):
"""
Uninstall TUN/TAP virtual interfaces.
"""
for key in sorted(self._emane_nodes.keys()):
emane_node = self._emane_nodes[key]
emane_node.deinstallnetifs()
def doeventmonitor(self):
"""
Returns boolean whether or not EMANE events will be monitored.
"""
# this support must be explicitly turned on; by default, CORE will
# generate the EMANE events when nodes are moved
return self.session.options.get_config_bool("emane_event_monitor")
def genlocationevents(self):
"""
Returns boolean whether or not EMANE events will be generated.
"""
# By default, CORE generates EMANE location events when nodes
# are moved; this can be explicitly disabled in core.conf
tmp = self.session.options.get_config_bool("emane_event_generate")
if tmp is None:
tmp = not self.doeventmonitor()
return tmp
def starteventmonitor(self):
"""
Start monitoring EMANE location events if configured to do so.
"""
logger.info("emane start event monitor")
if not self.doeventmonitor():
return
if self.service is None:
logger.error("Warning: EMANE events will not be generated "
"because the emaneeventservice\n binding was "
"unable to load "
"(install the python-emaneeventservice bindings)")
return
self.doeventloop = True
self.eventmonthread = threading.Thread(target=self.eventmonitorloop)
self.eventmonthread.daemon = True
self.eventmonthread.start()
def stopeventmonitor(self):
"""
Stop monitoring EMANE location events.
"""
self.doeventloop = False
if self.service is not None:
self.service.breakloop()
# reset the service, otherwise nextEvent won"t work
self.initeventservice(shutdown=True)
if self.eventmonthread is not None:
# TODO: fix this
self.eventmonthread._Thread__stop()
self.eventmonthread.join()
self.eventmonthread = None
def eventmonitorloop(self):
"""
Thread target that monitors EMANE location events.
"""
if self.service is None:
return
logger.info("subscribing to EMANE location events. (%s)",
threading.currentThread().getName())
while self.doeventloop is True:
uuid, seq, events = self.service.nextEvent()
# this occurs with 0.9.1 event service
if not self.doeventloop:
break
for event in events:
nem, eid, data = event
if eid == LocationEvent.IDENTIFIER:
self.handlelocationevent(nem, eid, data)
logger.info("unsubscribing from EMANE location events. (%s)",
threading.currentThread().getName())
def handlelocationevent(self, rxnemid, eid, data):
"""
Handle an EMANE location event.
"""
events = LocationEvent()
events.restore(data)
for event in events:
txnemid, attrs = event
if "latitude" not in attrs or "longitude" not in attrs or "altitude" not in attrs:
logger.warn("dropped invalid location event")
continue
# yaw,pitch,roll,azimuth,elevation,velocity are unhandled
lat = attrs["latitude"]
lon = attrs["longitude"]
alt = attrs["altitude"]
logger.debug("emane location event: %s,%s,%s", lat, lon, alt)
self.handlelocationeventtoxyz(txnemid, lat, lon, alt)
def handlelocationeventtoxyz(self, nemid, lat, lon, alt):
"""
Convert the (NEM ID, lat, long, alt) from a received location event
into a node and x,y,z coordinate values, sending a Node Message.
Returns True if successfully parsed and a Node Message was sent.
"""
# convert nemid to node number
emanenode, netif = self.nemlookup(nemid)
if netif is None:
logger.info("location event for unknown NEM %s", nemid)
return False
n = netif.node.objid
# convert from lat/long/alt to x,y,z coordinates
x, y, z = self.session.location.getxyz(lat, lon, alt)
x = int(x)
y = int(y)
z = int(z)
logger.info("location event NEM %s (%s, %s, %s) -> (%s, %s, %s)",
nemid, lat, lon, alt, x, y, z)
xbit_check = x.bit_length() > 16 or x < 0
ybit_check = y.bit_length() > 16 or y < 0
zbit_check = z.bit_length() > 16 or z < 0
if any([xbit_check, ybit_check, zbit_check]):
logger.error(
"Unable to build node location message, received lat/long/alt exceeds coordinate "
"space: NEM %s (%d, %d, %d)", nemid, x, y, z)
return False
# generate a node message for this location update
try:
node = self.session.get_object(n)
except KeyError:
logger.exception(
"location event NEM %s has no corresponding node %s" %
(nemid, n))
return False
# don"t use node.setposition(x,y,z) which generates an event
node.position.set(x, y, z)
node_data = node.data(message_type=0,
lat=str(lat),
lon=str(lon),
alt=str(alt))
self.session.broadcast_node(node_data)
return True
def emanerunning(self, node):
"""
Return True if an EMANE process associated with the given node is running, False otherwise.
"""
args = ["pkill", "-0", "-x", "emane"]
status = node.cmd(args)
return status == 0
class EmaneManager(ModelManager):
"""
EMANE controller object. Lives in a Session instance and is used for
building EMANE config files for all EMANE networks in this emulation, and for
controlling the EMANE daemons.
"""
name: str = "emane"
config_type: RegisterTlvs = RegisterTlvs.EMULATION_SERVER
NOT_READY: int = 2
EVENTCFGVAR: str = "LIBEMANEEVENTSERVICECONFIG"
DEFAULT_LOG_LEVEL: int = 3
def __init__(self, session: "Session") -> None:
"""
Creates a Emane instance.
:param session: session this manager is tied to
:return: nothing
"""
super().__init__()
self.session: "Session" = session
self.nems_to_ifaces: Dict[int, CoreInterface] = {}
self.ifaces_to_nems: Dict[CoreInterface, int] = {}
self._emane_nets: Dict[int, EmaneNet] = {}
self._emane_node_lock: threading.Lock = threading.Lock()
# port numbers are allocated from these counters
self.platformport: int = self.session.options.get_config_int(
"emane_platform_port", 8100)
self.transformport: int = self.session.options.get_config_int(
"emane_transform_port", 8200)
self.doeventloop: bool = False
self.eventmonthread: Optional[threading.Thread] = None
# model for global EMANE configuration options
self.emane_config: EmaneGlobalModel = EmaneGlobalModel(session)
self.set_configs(self.emane_config.default_values())
# link monitor
self.link_monitor: EmaneLinkMonitor = EmaneLinkMonitor(self)
self.service: Optional[EventService] = None
self.eventchannel: Optional[Tuple[str, int, str]] = None
self.event_device: Optional[str] = None
self.emane_check()
def next_nem_id(self) -> int:
nem_id = int(self.get_config("nem_id_start"))
while nem_id in self.nems_to_ifaces:
nem_id += 1
return nem_id
def get_iface_config(self, emane_net: EmaneNet,
iface: CoreInterface) -> Dict[str, str]:
"""
Retrieve configuration for a given interface.
:param emane_net: emane network the interface is connected to
:param iface: interface running emane
:return: net, node, or interface model configuration
"""
model_name = emane_net.model.name
# don"t use default values when interface config is the same as net
# note here that using iface.node.id as key allows for only one type
# of each model per node;
# TODO: use both node and interface as key
# Adamson change: first check for iface config keyed by "node:iface.name"
# (so that nodes w/ multiple interfaces of same conftype can have
# different configs for each separate interface)
key = 1000 * iface.node.id
if iface.node_id is not None:
key += iface.node_id
# try retrieve interface specific configuration, avoid getting defaults
config = self.get_configs(node_id=key, config_type=model_name)
# otherwise retrieve the interfaces node configuration, avoid using defaults
if not config:
config = self.get_configs(node_id=iface.node.id,
config_type=model_name)
# get non interface config, when none found
if not config:
# with EMANE 0.9.2+, we need an extra NEM XML from
# model.buildnemxmlfiles(), so defaults are returned here
config = self.get_configs(node_id=emane_net.id,
config_type=model_name)
return config
def config_reset(self, node_id: int = None) -> None:
super().config_reset(node_id)
self.set_configs(self.emane_config.default_values())
def emane_check(self) -> None:
"""
Check if emane is installed and load models.
:return: nothing
"""
# check for emane
path = utils.which("emane", required=False)
if not path:
logging.info("emane is not installed")
return
# get version
emane_version = utils.cmd("emane --version")
logging.info("using emane: %s", emane_version)
# load default emane models
self.load_models(EMANE_MODELS)
# load custom models
custom_models_path = self.session.options.get_config(
"emane_models_dir")
if custom_models_path:
emane_models = utils.load_classes(custom_models_path, EmaneModel)
self.load_models(emane_models)
def deleteeventservice(self) -> None:
if self.service:
for fd in self.service._readFd, self.service._writeFd:
if fd >= 0:
os.close(fd)
for f in self.service._socket, self.service._socketOTA:
if f:
f.close()
self.service = None
self.event_device = None
def initeventservice(self,
filename: str = None,
shutdown: bool = False) -> None:
"""
Re-initialize the EMANE Event service.
The multicast group and/or port may be configured.
"""
self.deleteeventservice()
if shutdown:
return
# Get the control network to be used for events
group, port = self.get_config("eventservicegroup").split(":")
self.event_device = self.get_config("eventservicedevice")
eventnetidx = self.session.get_control_net_index(self.event_device)
if eventnetidx < 0:
logging.error("invalid emane event service device provided: %s",
self.event_device)
return
# make sure the event control network is in place
eventnet = self.session.add_remove_control_net(net_index=eventnetidx,
remove=False,
conf_required=False)
if eventnet is not None:
# direct EMANE events towards control net bridge
self.event_device = eventnet.brname
self.eventchannel = (group, int(port), self.event_device)
# disabled otachannel for event service
# only needed for e.g. antennaprofile events xmit by models
logging.info("using %s for event service traffic", self.event_device)
try:
self.service = EventService(eventchannel=self.eventchannel,
otachannel=None)
except EventServiceException:
logging.exception("error instantiating emane EventService")
def load_models(self, emane_models: List[Type[EmaneModel]]) -> None:
"""
Load EMANE models and make them available.
"""
for emane_model in emane_models:
logging.debug("loading emane model: %s", emane_model.__name__)
emane_prefix = self.session.options.get_config(
"emane_prefix", default=DEFAULT_EMANE_PREFIX)
emane_model.load(emane_prefix)
self.models[emane_model.name] = emane_model
def add_node(self, emane_net: EmaneNet) -> None:
"""
Add EMANE network object to this manager.
:param emane_net: emane node to add
:return: nothing
"""
with self._emane_node_lock:
if emane_net.id in self._emane_nets:
raise CoreError(
f"duplicate emane network({emane_net.id}): {emane_net.name}"
)
self._emane_nets[emane_net.id] = emane_net
def getnodes(self) -> Set[CoreNode]:
"""
Return a set of CoreNodes that are linked to an EMANE network,
e.g. containers having one or more radio interfaces.
"""
nodes = set()
for emane_net in self._emane_nets.values():
for iface in emane_net.get_ifaces():
nodes.add(iface.node)
return nodes
def setup(self) -> EmaneState:
"""
Setup duties for EMANE manager.
:return: SUCCESS, NOT_NEEDED, NOT_READY in order to delay session
instantiation
"""
logging.debug("emane setup")
with self.session.nodes_lock:
for node_id in self.session.nodes:
node = self.session.nodes[node_id]
if isinstance(node, EmaneNet):
logging.debug("adding emane node: id(%s) name(%s)",
node.id, node.name)
self.add_node(node)
if not self._emane_nets:
logging.debug("no emane nodes in session")
return EmaneState.NOT_NEEDED
# check if bindings were installed
if EventService is None:
raise CoreError("EMANE python bindings are not installed")
# control network bridge required for EMANE 0.9.2
# - needs to exist when eventservice binds to it (initeventservice)
otadev = self.get_config("otamanagerdevice")
netidx = self.session.get_control_net_index(otadev)
logging.debug("emane ota manager device: index(%s) otadev(%s)", netidx,
otadev)
if netidx < 0:
logging.error(
"EMANE cannot start, check core config. invalid OTA device provided: %s",
otadev,
)
return EmaneState.NOT_READY
self.session.add_remove_control_net(net_index=netidx,
remove=False,
conf_required=False)
eventdev = self.get_config("eventservicedevice")
logging.debug("emane event service device: eventdev(%s)", eventdev)
if eventdev != otadev:
netidx = self.session.get_control_net_index(eventdev)
logging.debug("emane event service device index: %s", netidx)
if netidx < 0:
logging.error(
"emane cannot start due to invalid event service device: %s",
eventdev,
)
return EmaneState.NOT_READY
self.session.add_remove_control_net(net_index=netidx,
remove=False,
conf_required=False)
self.check_node_models()
return EmaneState.SUCCESS
def startup(self) -> EmaneState:
"""
After all the EMANE networks have been added, build XML files
and start the daemons.
:return: SUCCESS, NOT_NEEDED, NOT_READY in order to delay session
instantiation
"""
self.reset()
status = self.setup()
if status != EmaneState.SUCCESS:
return status
self.starteventmonitor()
self.buildeventservicexml()
with self._emane_node_lock:
logging.info("emane building xmls...")
for node_id in sorted(self._emane_nets):
emane_net = self._emane_nets[node_id]
if not emane_net.model:
logging.error("emane net(%s) has no model", emane_net.name)
continue
for iface in emane_net.get_ifaces():
self.start_iface(emane_net, iface)
if self.links_enabled():
self.link_monitor.start()
return EmaneState.SUCCESS
def start_iface(self, emane_net: EmaneNet, iface: CoreInterface) -> None:
if not iface.node:
logging.error(
"emane net(%s) connected interface(%s) missing node",
emane_net.name,
iface.name,
)
return
control_net = self.session.add_remove_control_net(0,
remove=False,
conf_required=False)
nem_id = self.next_nem_id()
self.set_nem(nem_id, iface)
self.write_nem(iface, nem_id)
emanexml.build_platform_xml(self, control_net, emane_net, iface,
nem_id)
config = self.get_iface_config(emane_net, iface)
emane_net.model.build_xml_files(config, iface)
self.start_daemon(iface)
self.install_iface(emane_net, iface)
def set_nem(self, nem_id: int, iface: CoreInterface) -> None:
if nem_id in self.nems_to_ifaces:
raise CoreError(f"adding duplicate nem: {nem_id}")
self.nems_to_ifaces[nem_id] = iface
self.ifaces_to_nems[iface] = nem_id
def get_iface(self, nem_id: int) -> Optional[CoreInterface]:
return self.nems_to_ifaces.get(nem_id)
def get_nem_id(self, iface: CoreInterface) -> Optional[int]:
return self.ifaces_to_nems.get(iface)
def write_nem(self, iface: CoreInterface, nem_id: int) -> None:
path = os.path.join(self.session.session_dir, "emane_nems")
try:
with open(path, "a") as f:
f.write(f"{iface.node.name} {iface.name} {nem_id}\n")
except IOError:
logging.exception("error writing to emane nem file")
def links_enabled(self) -> bool:
return self.get_config("link_enabled") == "1"
def poststartup(self) -> None:
"""
Retransmit location events now that all NEMs are active.
"""
if not self.genlocationevents():
return
with self._emane_node_lock:
for node_id in sorted(self._emane_nets):
emane_net = self._emane_nets[node_id]
logging.debug("post startup for emane node: %s - %s",
emane_net.id, emane_net.name)
emane_net.model.post_startup()
for iface in emane_net.get_ifaces():
iface.setposition()
def reset(self) -> None:
"""
Remove all EMANE networks from the dictionary, reset port numbers and
nem id counters
"""
with self._emane_node_lock:
self._emane_nets.clear()
self.nems_to_ifaces.clear()
self.ifaces_to_nems.clear()
def shutdown(self) -> None:
"""
stop all EMANE daemons
"""
with self._emane_node_lock:
if not self._emane_nets:
return
logging.info("stopping EMANE daemons")
if self.links_enabled():
self.link_monitor.stop()
self.deinstall_ifaces()
self.stopdaemons()
self.stopeventmonitor()
def check_node_models(self) -> None:
"""
Associate EMANE model classes with EMANE network nodes.
"""
for node_id in self._emane_nets:
emane_net = self._emane_nets[node_id]
logging.debug("checking emane model for node: %s", node_id)
# skip nodes that already have a model set
if emane_net.model:
logging.debug("node(%s) already has model(%s)", emane_net.id,
emane_net.model.name)
continue
# set model configured for node, due to legacy messaging configuration
# before nodes exist
model_name = self.node_models.get(node_id)
if not model_name:
logging.error("emane node(%s) has no node model", node_id)
raise ValueError("emane node has no model set")
config = self.get_model_config(node_id=node_id,
model_name=model_name)
logging.debug("setting emane model(%s) config(%s)", model_name,
config)
model_class = self.models[model_name]
emane_net.setmodel(model_class, config)
def get_nem_link(
self,
nem1: int,
nem2: int,
flags: MessageFlags = MessageFlags.NONE) -> Optional[LinkData]:
iface1 = self.get_iface(nem1)
if not iface1:
logging.error("invalid nem: %s", nem1)
return None
node1 = iface1.node
iface2 = self.get_iface(nem2)
if not iface2:
logging.error("invalid nem: %s", nem2)
return None
node2 = iface2.node
if iface1.net != iface2.net:
return None
emane_net = iface1.net
color = self.session.get_link_color(emane_net.id)
return LinkData(
message_type=flags,
type=LinkTypes.WIRELESS,
node1_id=node1.id,
node2_id=node2.id,
network_id=emane_net.id,
color=color,
)
def buildeventservicexml(self) -> None:
"""
Build the libemaneeventservice.xml file if event service options
were changed in the global config.
"""
need_xml = False
default_values = self.emane_config.default_values()
for name in ["eventservicegroup", "eventservicedevice"]:
a = default_values[name]
b = self.get_config(name)
if a != b:
need_xml = True
if not need_xml:
# reset to using default config
self.initeventservice()
return
try:
group, port = self.get_config("eventservicegroup").split(":")
except ValueError:
logging.exception("invalid eventservicegroup in EMANE config")
return
dev = self.get_config("eventservicedevice")
emanexml.create_event_service_xml(group, port, dev,
self.session.session_dir)
self.session.distributed.execute(
lambda x: emanexml.create_event_service_xml(
group, port, dev, self.session.session_dir, x))
def start_daemon(self, iface: CoreInterface) -> None:
"""
Start one EMANE daemon per node having a radio.
Add a control network even if the user has not configured one.
"""
logging.info("starting emane daemons...")
loglevel = str(EmaneManager.DEFAULT_LOG_LEVEL)
cfgloglevel = self.session.options.get_config_int("emane_log_level")
realtime = self.session.options.get_config_bool("emane_realtime",
default=True)
if cfgloglevel:
logging.info("setting user-defined emane log level: %d",
cfgloglevel)
loglevel = str(cfgloglevel)
emanecmd = f"emane -d -l {loglevel}"
if realtime:
emanecmd += " -r"
node = iface.node
if iface.is_virtual():
otagroup, _otaport = self.get_config("otamanagergroup").split(":")
otadev = self.get_config("otamanagerdevice")
otanetidx = self.session.get_control_net_index(otadev)
eventgroup, _eventport = self.get_config(
"eventservicegroup").split(":")
eventdev = self.get_config("eventservicedevice")
eventservicenetidx = self.session.get_control_net_index(eventdev)
# control network not yet started here
self.session.add_remove_control_iface(node,
0,
remove=False,
conf_required=False)
if otanetidx > 0:
logging.info("adding ota device ctrl%d", otanetidx)
self.session.add_remove_control_iface(node,
otanetidx,
remove=False,
conf_required=False)
if eventservicenetidx >= 0:
logging.info("adding event service device ctrl%d",
eventservicenetidx)
self.session.add_remove_control_iface(node,
eventservicenetidx,
remove=False,
conf_required=False)
# multicast route is needed for OTA data
logging.info("OTA GROUP(%s) OTA DEV(%s)", otagroup, otadev)
node.node_net_client.create_route(otagroup, otadev)
# multicast route is also needed for event data if on control network
if eventservicenetidx >= 0 and eventgroup != otagroup:
node.node_net_client.create_route(eventgroup, eventdev)
# start emane
log_file = os.path.join(node.nodedir, f"{iface.name}-emane.log")
platform_xml = os.path.join(node.nodedir,
f"{iface.name}-platform.xml")
args = f"{emanecmd} -f {log_file} {platform_xml}"
node.cmd(args)
logging.info("node(%s) emane daemon running: %s", node.name, args)
else:
path = self.session.session_dir
log_file = os.path.join(path, f"{iface.name}-emane.log")
platform_xml = os.path.join(path, f"{iface.name}-platform.xml")
emanecmd += f" -f {log_file} {platform_xml}"
node.host_cmd(emanecmd, cwd=path)
logging.info("node(%s) host emane daemon running: %s", node.name,
emanecmd)
def stopdaemons(self) -> None:
"""
Kill the appropriate EMANE daemons.
"""
kill_emaned = "killall -q emane"
for node_id in sorted(self._emane_nets):
emane_net = self._emane_nets[node_id]
for iface in emane_net.get_ifaces():
node = iface.node
if not node.up:
continue
if iface.is_raw():
node.host_cmd(kill_emaned, wait=False)
else:
node.cmd(kill_emaned, wait=False)
def install_iface(self, emane_net: EmaneNet, iface: CoreInterface) -> None:
config = self.get_iface_config(emane_net, iface)
external = config.get("external", "0")
if isinstance(iface, TunTap) and external == "0":
iface.set_ips()
# at this point we register location handlers for generating
# EMANE location events
if self.genlocationevents():
iface.poshook = emane_net.setnemposition
iface.setposition()
def deinstall_ifaces(self) -> None:
"""
Uninstall TUN/TAP virtual interfaces.
"""
for key in sorted(self._emane_nets):
emane_net = self._emane_nets[key]
for iface in emane_net.get_ifaces():
if iface.is_virtual():
iface.shutdown()
iface.poshook = None
def doeventmonitor(self) -> bool:
"""
Returns boolean whether or not EMANE events will be monitored.
"""
# this support must be explicitly turned on; by default, CORE will
# generate the EMANE events when nodes are moved
return self.session.options.get_config_bool("emane_event_monitor")
def genlocationevents(self) -> bool:
"""
Returns boolean whether or not EMANE events will be generated.
"""
# By default, CORE generates EMANE location events when nodes
# are moved; this can be explicitly disabled in core.conf
tmp = self.session.options.get_config_bool("emane_event_generate")
if tmp is None:
tmp = not self.doeventmonitor()
return tmp
def starteventmonitor(self) -> None:
"""
Start monitoring EMANE location events if configured to do so.
"""
logging.info("emane start event monitor")
if not self.doeventmonitor():
return
if self.service is None:
logging.error("Warning: EMANE events will not be generated "
"because the emaneeventservice\n binding was "
"unable to load "
"(install the python-emaneeventservice bindings)")
return
self.doeventloop = True
self.eventmonthread = threading.Thread(target=self.eventmonitorloop,
daemon=True)
self.eventmonthread.start()
def stopeventmonitor(self) -> None:
"""
Stop monitoring EMANE location events.
"""
self.doeventloop = False
if self.service is not None:
self.service.breakloop()
# reset the service, otherwise nextEvent won"t work
self.initeventservice(shutdown=True)
if self.eventmonthread is not None:
self.eventmonthread.join()
self.eventmonthread = None
def eventmonitorloop(self) -> None:
"""
Thread target that monitors EMANE location events.
"""
if self.service is None:
return
logging.info(
"subscribing to EMANE location events. (%s)",
threading.currentThread().getName(),
)
while self.doeventloop is True:
_uuid, _seq, events = self.service.nextEvent()
# this occurs with 0.9.1 event service
if not self.doeventloop:
break
for event in events:
nem, eid, data = event
if eid == LocationEvent.IDENTIFIER:
self.handlelocationevent(nem, eid, data)
logging.info(
"unsubscribing from EMANE location events. (%s)",
threading.currentThread().getName(),
)
def handlelocationevent(self, rxnemid: int, eid: int, data: str) -> None:
"""
Handle an EMANE location event.
"""
events = LocationEvent()
events.restore(data)
for event in events:
txnemid, attrs = event
if ("latitude" not in attrs or "longitude" not in attrs
or "altitude" not in attrs):
logging.warning("dropped invalid location event")
continue
# yaw,pitch,roll,azimuth,elevation,velocity are unhandled
lat = attrs["latitude"]
lon = attrs["longitude"]
alt = attrs["altitude"]
logging.debug("emane location event: %s,%s,%s", lat, lon, alt)
self.handlelocationeventtoxyz(txnemid, lat, lon, alt)
def handlelocationeventtoxyz(self, nemid: int, lat: float, lon: float,
alt: float) -> bool:
"""
Convert the (NEM ID, lat, long, alt) from a received location event
into a node and x,y,z coordinate values, sending a Node Message.
Returns True if successfully parsed and a Node Message was sent.
"""
# convert nemid to node number
iface = self.get_iface(nemid)
if iface is None:
logging.info("location event for unknown NEM %s", nemid)
return False
n = iface.node.id
# convert from lat/long/alt to x,y,z coordinates
x, y, z = self.session.location.getxyz(lat, lon, alt)
x = int(x)
y = int(y)
z = int(z)
logging.debug(
"location event NEM %s (%s, %s, %s) -> (%s, %s, %s)",
nemid,
lat,
lon,
alt,
x,
y,
z,
)
xbit_check = x.bit_length() > 16 or x < 0
ybit_check = y.bit_length() > 16 or y < 0
zbit_check = z.bit_length() > 16 or z < 0
if any([xbit_check, ybit_check, zbit_check]):
logging.error(
"Unable to build node location message, received lat/long/alt "
"exceeds coordinate space: NEM %s (%d, %d, %d)",
nemid,
x,
y,
z,
)
return False
# generate a node message for this location update
try:
node = self.session.get_node(n, NodeBase)
except CoreError:
logging.exception(
"location event NEM %s has no corresponding node %s", nemid, n)
return False
# don"t use node.setposition(x,y,z) which generates an event
node.position.set(x, y, z)
node.position.set_geo(lon, lat, alt)
self.session.broadcast_node(node)
return True
def emanerunning(self, node: CoreNode) -> bool:
"""
Return True if an EMANE process associated with the given node is running,
False otherwise.
"""
args = "pkill -0 -x emane"
try:
node.cmd(args)
result = True
except CoreCommandError:
result = False
return result
def publish_pathloss(self, nem1: int, nem2: int, rx1: float,
rx2: float) -> None:
"""
Publish pathloss events between provided nems, using provided rx power.
:param nem1: interface one for pathloss
:param nem2: interface two for pathloss
:param rx1: received power from nem2 to nem1
:param rx2: received power from nem1 to nem2
:return: nothing
"""
event = PathlossEvent()
event.append(nem1, forward=rx1)
event.append(nem2, forward=rx2)
self.service.publish(nem1, event)
self.service.publish(nem2, event)
class EmaneManager(ModelManager):
"""
EMANE controller object. Lives in a Session instance and is used for
building EMANE config files for all EMANE networks in this emulation, and for
controlling the EMANE daemons.
"""
name = "emane"
config_type = RegisterTlvs.EMULATION_SERVER.value
SUCCESS, NOT_NEEDED, NOT_READY = (0, 1, 2)
EVENTCFGVAR = "LIBEMANEEVENTSERVICECONFIG"
DEFAULT_LOG_LEVEL = 3
def __init__(self, session: "Session") -> None:
"""
Creates a Emane instance.
:param session: session this manager is tied to
:return: nothing
"""
super().__init__()
self.session = session
self._emane_nets = {}
self._emane_node_lock = threading.Lock()
# port numbers are allocated from these counters
self.platformport = self.session.options.get_config_int(
"emane_platform_port", 8100
)
self.transformport = self.session.options.get_config_int(
"emane_transform_port", 8200
)
self.doeventloop = False
self.eventmonthread = None
# model for global EMANE configuration options
self.emane_config = EmaneGlobalModel(session)
self.set_configs(self.emane_config.default_values())
self.service = None
self.eventchannel = None
self.event_device = None
self.emane_check()
def getifcconfig(
self, node_id: int, interface: CoreInterface, model_name: str
) -> Dict[str, str]:
"""
Retrieve interface configuration or node configuration if not provided.
:param node_id: node id
:param interface: node interface
:param model_name: model to get configuration for
:return: node/interface model configuration
"""
# use the network-wide config values or interface(NEM)-specific values?
if interface is None:
return self.get_configs(node_id=node_id, config_type=model_name)
else:
# don"t use default values when interface config is the same as net
# note here that using ifc.node.id as key allows for only one type
# of each model per node;
# TODO: use both node and interface as key
# Adamson change: first check for iface config keyed by "node:ifc.name"
# (so that nodes w/ multiple interfaces of same conftype can have
# different configs for each separate interface)
key = 1000 * interface.node.id
if interface.netindex is not None:
key += interface.netindex
# try retrieve interface specific configuration, avoid getting defaults
config = self.get_configs(node_id=key, config_type=model_name)
# otherwise retrieve the interfaces node configuration, avoid using defaults
if not config:
config = self.get_configs(
node_id=interface.node.id, config_type=model_name
)
# get non interface config, when none found
if not config:
# with EMANE 0.9.2+, we need an extra NEM XML from
# model.buildnemxmlfiles(), so defaults are returned here
config = self.get_configs(node_id=node_id, config_type=model_name)
return config
def config_reset(self, node_id: int = None) -> None:
super().config_reset(node_id)
self.set_configs(self.emane_config.default_values())
def emane_check(self) -> None:
"""
Check if emane is installed and load models.
:return: nothing
"""
try:
# check for emane
args = "emane --version"
emane_version = utils.cmd(args)
logging.info("using EMANE: %s", emane_version)
self.session.distributed.execute(lambda x: x.remote_cmd(args))
# load default emane models
self.load_models(EMANE_MODELS)
# load custom models
custom_models_path = self.session.options.get_config("emane_models_dir")
if custom_models_path:
emane_models = utils.load_classes(custom_models_path, EmaneModel)
self.load_models(emane_models)
except CoreCommandError:
logging.info("emane is not installed")
def deleteeventservice(self) -> None:
if self.service:
for fd in self.service._readFd, self.service._writeFd:
if fd >= 0:
os.close(fd)
for f in self.service._socket, self.service._socketOTA:
if f:
f.close()
self.service = None
self.event_device = None
def initeventservice(self, filename: str = None, shutdown: bool = False) -> None:
"""
Re-initialize the EMANE Event service.
The multicast group and/or port may be configured.
"""
self.deleteeventservice()
if shutdown:
return
# Get the control network to be used for events
group, port = self.get_config("eventservicegroup").split(":")
self.event_device = self.get_config("eventservicedevice")
eventnetidx = self.session.get_control_net_index(self.event_device)
if eventnetidx < 0:
logging.error(
"invalid emane event service device provided: %s", self.event_device
)
return
# make sure the event control network is in place
eventnet = self.session.add_remove_control_net(
net_index=eventnetidx, remove=False, conf_required=False
)
if eventnet is not None:
# direct EMANE events towards control net bridge
self.event_device = eventnet.brname
self.eventchannel = (group, int(port), self.event_device)
# disabled otachannel for event service
# only needed for e.g. antennaprofile events xmit by models
logging.info("using %s for event service traffic", self.event_device)
try:
self.service = EventService(eventchannel=self.eventchannel, otachannel=None)
except EventServiceException:
logging.exception("error instantiating emane EventService")
def load_models(self, emane_models: List[Type[EmaneModel]]) -> None:
"""
Load EMANE models and make them available.
"""
for emane_model in emane_models:
logging.debug("loading emane model: %s", emane_model.__name__)
emane_prefix = self.session.options.get_config(
"emane_prefix", default=DEFAULT_EMANE_PREFIX
)
emane_model.load(emane_prefix)
self.models[emane_model.name] = emane_model
def add_node(self, emane_net: EmaneNet) -> None:
"""
Add EMANE network object to this manager.
:param emane_net: emane node to add
:return: nothing
"""
with self._emane_node_lock:
if emane_net.id in self._emane_nets:
raise KeyError(
f"non-unique EMANE object id {emane_net.id} for {emane_net}"
)
self._emane_nets[emane_net.id] = emane_net
def getnodes(self) -> Set[CoreNode]:
"""
Return a set of CoreNodes that are linked to an EMANE network,
e.g. containers having one or more radio interfaces.
"""
# assumes self._objslock already held
nodes = set()
for emane_net in self._emane_nets.values():
for netif in emane_net.netifs():
nodes.add(netif.node)
return nodes
def setup(self) -> int:
"""
Setup duties for EMANE manager.
:return: SUCCESS, NOT_NEEDED, NOT_READY in order to delay session
instantiation
"""
logging.debug("emane setup")
# TODO: drive this from the session object
with self.session._nodes_lock:
for node_id in self.session.nodes:
node = self.session.nodes[node_id]
if isinstance(node, EmaneNet):
logging.debug(
"adding emane node: id(%s) name(%s)", node.id, node.name
)
self.add_node(node)
if not self._emane_nets:
logging.debug("no emane nodes in session")
return EmaneManager.NOT_NEEDED
# control network bridge required for EMANE 0.9.2
# - needs to exist when eventservice binds to it (initeventservice)
otadev = self.get_config("otamanagerdevice")
netidx = self.session.get_control_net_index(otadev)
logging.debug("emane ota manager device: index(%s) otadev(%s)", netidx, otadev)
if netidx < 0:
logging.error(
"EMANE cannot start, check core config. invalid OTA device provided: %s",
otadev,
)
return EmaneManager.NOT_READY
self.session.add_remove_control_net(
net_index=netidx, remove=False, conf_required=False
)
eventdev = self.get_config("eventservicedevice")
logging.debug("emane event service device: eventdev(%s)", eventdev)
if eventdev != otadev:
netidx = self.session.get_control_net_index(eventdev)
logging.debug("emane event service device index: %s", netidx)
if netidx < 0:
logging.error(
"EMANE cannot start, check core config. invalid event service device: %s",
eventdev,
)
return EmaneManager.NOT_READY
self.session.add_remove_control_net(
net_index=netidx, remove=False, conf_required=False
)
self.check_node_models()
return EmaneManager.SUCCESS
def startup(self) -> int:
"""
After all the EMANE networks have been added, build XML files
and start the daemons.
:return: SUCCESS, NOT_NEEDED, NOT_READY in order to delay session
instantiation
"""
self.reset()
r = self.setup()
# NOT_NEEDED or NOT_READY
if r != EmaneManager.SUCCESS:
return r
nems = []
with self._emane_node_lock:
self.buildxml()
self.starteventmonitor()
if self.numnems() > 0:
self.startdaemons()
self.installnetifs()
for node_id in self._emane_nets:
emane_node = self._emane_nets[node_id]
for netif in emane_node.netifs():
nems.append(
(netif.node.name, netif.name, emane_node.getnemid(netif))
)
if nems:
emane_nems_filename = os.path.join(self.session.session_dir, "emane_nems")
try:
with open(emane_nems_filename, "w") as f:
for nodename, ifname, nemid in nems:
f.write(f"{nodename} {ifname} {nemid}\n")
except IOError:
logging.exception("Error writing EMANE NEMs file: %s")
return EmaneManager.SUCCESS
def poststartup(self) -> None:
"""
Retransmit location events now that all NEMs are active.
"""
if not self.genlocationevents():
return
with self._emane_node_lock:
for key in sorted(self._emane_nets.keys()):
emane_node = self._emane_nets[key]
logging.debug(
"post startup for emane node: %s - %s",
emane_node.id,
emane_node.name,
)
emane_node.model.post_startup()
for netif in emane_node.netifs():
x, y, z = netif.node.position.get()
emane_node.setnemposition(netif, x, y, z)
def reset(self) -> None:
"""
Remove all EMANE networks from the dictionary, reset port numbers and
nem id counters
"""
with self._emane_node_lock:
self._emane_nets.clear()
self.platformport = self.session.options.get_config_int(
"emane_platform_port", 8100
)
self.transformport = self.session.options.get_config_int(
"emane_transform_port", 8200
)
def shutdown(self) -> None:
"""
stop all EMANE daemons
"""
with self._emane_node_lock:
if not self._emane_nets:
return
logging.info("stopping EMANE daemons.")
self.deinstallnetifs()
self.stopdaemons()
self.stopeventmonitor()
def buildxml(self) -> None:
"""
Build XML files required to run EMANE on each node.
NEMs run inside containers using the control network for passing
events and data.
"""
# assume self._objslock is already held here
logging.info("emane building xml...")
# on master, control network bridge added earlier in startup()
ctrlnet = self.session.add_remove_control_net(
net_index=0, remove=False, conf_required=False
)
self.buildplatformxml(ctrlnet)
self.buildnemxml()
self.buildeventservicexml()
def check_node_models(self) -> None:
"""
Associate EMANE model classes with EMANE network nodes.
"""
for node_id in self._emane_nets:
emane_node = self._emane_nets[node_id]
logging.debug("checking emane model for node: %s", node_id)
# skip nodes that already have a model set
if emane_node.model:
logging.debug(
"node(%s) already has model(%s)",
emane_node.id,
emane_node.model.name,
)
continue
# set model configured for node, due to legacy messaging configuration before nodes exist
model_name = self.node_models.get(node_id)
if not model_name:
logging.error("emane node(%s) has no node model", node_id)
raise ValueError("emane node has no model set")
config = self.get_model_config(node_id=node_id, model_name=model_name)
logging.debug("setting emane model(%s) config(%s)", model_name, config)
model_class = self.models[model_name]
emane_node.setmodel(model_class, config)
def nemlookup(self, nemid) -> Tuple[EmaneNet, CoreInterface]:
"""
Look for the given numerical NEM ID and return the first matching
EMANE network and NEM interface.
"""
emane_node = None
netif = None
for node_id in self._emane_nets:
emane_node = self._emane_nets[node_id]
netif = emane_node.getnemnetif(nemid)
if netif is not None:
break
else:
emane_node = None
return emane_node, netif
def numnems(self) -> int:
"""
Return the number of NEMs emulated locally.
"""
count = 0
for node_id in self._emane_nets:
emane_node = self._emane_nets[node_id]
count += len(emane_node.netifs())
return count
def buildplatformxml(self, ctrlnet: CtrlNet) -> None:
"""
Build a platform.xml file now that all nodes are configured.
"""
nemid = int(self.get_config("nem_id_start"))
platform_xmls = {}
# assume self._objslock is already held here
for key in sorted(self._emane_nets.keys()):
emane_node = self._emane_nets[key]
nemid = emanexml.build_node_platform_xml(
self, ctrlnet, emane_node, nemid, platform_xmls
)
def buildnemxml(self) -> None:
"""
Builds the nem, mac, and phy xml files for each EMANE network.
"""
for key in sorted(self._emane_nets):
emane_net = self._emane_nets[key]
emanexml.build_xml_files(self, emane_net)
def buildeventservicexml(self) -> None:
"""
Build the libemaneeventservice.xml file if event service options
were changed in the global config.
"""
need_xml = False
default_values = self.emane_config.default_values()
for name in ["eventservicegroup", "eventservicedevice"]:
a = default_values[name]
b = self.get_config(name)
if a != b:
need_xml = True
if not need_xml:
# reset to using default config
self.initeventservice()
return
try:
group, port = self.get_config("eventservicegroup").split(":")
except ValueError:
logging.exception("invalid eventservicegroup in EMANE config")
return
dev = self.get_config("eventservicedevice")
emanexml.create_event_service_xml(group, port, dev, self.session.session_dir)
self.session.distributed.execute(
lambda x: emanexml.create_event_service_xml(
group, port, dev, self.session.session_dir, x
)
)
def startdaemons(self) -> None:
"""
Start one EMANE daemon per node having a radio.
Add a control network even if the user has not configured one.
"""
logging.info("starting emane daemons...")
loglevel = str(EmaneManager.DEFAULT_LOG_LEVEL)
cfgloglevel = self.session.options.get_config_int("emane_log_level")
realtime = self.session.options.get_config_bool("emane_realtime", default=True)
if cfgloglevel:
logging.info("setting user-defined EMANE log level: %d", cfgloglevel)
loglevel = str(cfgloglevel)
emanecmd = f"emane -d -l {loglevel}"
if realtime:
emanecmd += " -r"
otagroup, _otaport = self.get_config("otamanagergroup").split(":")
otadev = self.get_config("otamanagerdevice")
otanetidx = self.session.get_control_net_index(otadev)
eventgroup, _eventport = self.get_config("eventservicegroup").split(":")
eventdev = self.get_config("eventservicedevice")
eventservicenetidx = self.session.get_control_net_index(eventdev)
run_emane_on_host = False
for node in self.getnodes():
if hasattr(node, "transport_type") and node.transport_type == "raw":
run_emane_on_host = True
continue
path = self.session.session_dir
n = node.id
# control network not yet started here
self.session.add_remove_control_interface(
node, 0, remove=False, conf_required=False
)
if otanetidx > 0:
logging.info("adding ota device ctrl%d", otanetidx)
self.session.add_remove_control_interface(
node, otanetidx, remove=False, conf_required=False
)
if eventservicenetidx >= 0:
logging.info("adding event service device ctrl%d", eventservicenetidx)
self.session.add_remove_control_interface(
node, eventservicenetidx, remove=False, conf_required=False
)
# multicast route is needed for OTA data
node.node_net_client.create_route(otagroup, otadev)
# multicast route is also needed for event data if on control network
if eventservicenetidx >= 0 and eventgroup != otagroup:
node.node_net_client.create_route(eventgroup, eventdev)
# start emane
log_file = os.path.join(path, f"emane{n}.log")
platform_xml = os.path.join(path, f"platform{n}.xml")
args = f"{emanecmd} -f {log_file} {platform_xml}"
output = node.cmd(args)
logging.info("node(%s) emane daemon running: %s", node.name, args)
logging.debug("node(%s) emane daemon output: %s", node.name, output)
if not run_emane_on_host:
return
path = self.session.session_dir
log_file = os.path.join(path, "emane.log")
platform_xml = os.path.join(path, "platform.xml")
emanecmd += f" -f {log_file} {platform_xml}"
utils.cmd(emanecmd, cwd=path)
self.session.distributed.execute(lambda x: x.remote_cmd(emanecmd, cwd=path))
logging.info("host emane daemon running: %s", emanecmd)
def stopdaemons(self) -> None:
"""
Kill the appropriate EMANE daemons.
"""
# TODO: we may want to improve this if we had the PIDs from the specific EMANE
# daemons that we"ve started
kill_emaned = "killall -q emane"
kill_transortd = "killall -q emanetransportd"
stop_emane_on_host = False
for node in self.getnodes():
if hasattr(node, "transport_type") and node.transport_type == "raw":
stop_emane_on_host = True
continue
if node.up:
node.cmd(kill_emaned, wait=False)
# TODO: RJ45 node
if stop_emane_on_host:
try:
utils.cmd(kill_emaned)
utils.cmd(kill_transortd)
self.session.distributed.execute(lambda x: x.remote_cmd(kill_emaned))
self.session.distributed.execute(lambda x: x.remote_cmd(kill_transortd))
except CoreCommandError:
logging.exception("error shutting down emane daemons")
def installnetifs(self) -> None:
"""
Install TUN/TAP virtual interfaces into their proper namespaces
now that the EMANE daemons are running.
"""
for key in sorted(self._emane_nets.keys()):
emane_node = self._emane_nets[key]
logging.info("emane install netifs for node: %d", key)
emane_node.installnetifs()
def deinstallnetifs(self) -> None:
"""
Uninstall TUN/TAP virtual interfaces.
"""
for key in sorted(self._emane_nets.keys()):
emane_node = self._emane_nets[key]
emane_node.deinstallnetifs()
def doeventmonitor(self) -> bool:
"""
Returns boolean whether or not EMANE events will be monitored.
"""
# this support must be explicitly turned on; by default, CORE will
# generate the EMANE events when nodes are moved
return self.session.options.get_config_bool("emane_event_monitor")
def genlocationevents(self) -> bool:
"""
Returns boolean whether or not EMANE events will be generated.
"""
# By default, CORE generates EMANE location events when nodes
# are moved; this can be explicitly disabled in core.conf
tmp = self.session.options.get_config_bool("emane_event_generate")
if tmp is None:
tmp = not self.doeventmonitor()
return tmp
def starteventmonitor(self) -> None:
"""
Start monitoring EMANE location events if configured to do so.
"""
logging.info("emane start event monitor")
if not self.doeventmonitor():
return
if self.service is None:
logging.error(
"Warning: EMANE events will not be generated "
"because the emaneeventservice\n binding was "
"unable to load "
"(install the python-emaneeventservice bindings)"
)
return
self.doeventloop = True
self.eventmonthread = threading.Thread(
target=self.eventmonitorloop, daemon=True
)
self.eventmonthread.start()
def stopeventmonitor(self) -> None:
"""
Stop monitoring EMANE location events.
"""
self.doeventloop = False
if self.service is not None:
self.service.breakloop()
# reset the service, otherwise nextEvent won"t work
self.initeventservice(shutdown=True)
if self.eventmonthread is not None:
self.eventmonthread.join()
self.eventmonthread = None
def eventmonitorloop(self) -> None:
"""
Thread target that monitors EMANE location events.
"""
if self.service is None:
return
logging.info(
"subscribing to EMANE location events. (%s)",
threading.currentThread().getName(),
)
while self.doeventloop is True:
_uuid, _seq, events = self.service.nextEvent()
# this occurs with 0.9.1 event service
if not self.doeventloop:
break
for event in events:
nem, eid, data = event
if eid == LocationEvent.IDENTIFIER:
self.handlelocationevent(nem, eid, data)
logging.info(
"unsubscribing from EMANE location events. (%s)",
threading.currentThread().getName(),
)
def handlelocationevent(self, rxnemid: int, eid: int, data: str) -> None:
"""
Handle an EMANE location event.
"""
events = LocationEvent()
events.restore(data)
for event in events:
txnemid, attrs = event
if (
"latitude" not in attrs
or "longitude" not in attrs
or "altitude" not in attrs
):
logging.warning("dropped invalid location event")
continue
# yaw,pitch,roll,azimuth,elevation,velocity are unhandled
lat = attrs["latitude"]
lon = attrs["longitude"]
alt = attrs["altitude"]
logging.debug("emane location event: %s,%s,%s", lat, lon, alt)
self.handlelocationeventtoxyz(txnemid, lat, lon, alt)
def handlelocationeventtoxyz(
self, nemid: int, lat: float, lon: float, alt: float
) -> bool:
"""
Convert the (NEM ID, lat, long, alt) from a received location event
into a node and x,y,z coordinate values, sending a Node Message.
Returns True if successfully parsed and a Node Message was sent.
"""
# convert nemid to node number
_emanenode, netif = self.nemlookup(nemid)
if netif is None:
logging.info("location event for unknown NEM %s", nemid)
return False
n = netif.node.id
# convert from lat/long/alt to x,y,z coordinates
x, y, z = self.session.location.getxyz(lat, lon, alt)
x = int(x)
y = int(y)
z = int(z)
logging.debug(
"location event NEM %s (%s, %s, %s) -> (%s, %s, %s)",
nemid,
lat,
lon,
alt,
x,
y,
z,
)
xbit_check = x.bit_length() > 16 or x < 0
ybit_check = y.bit_length() > 16 or y < 0
zbit_check = z.bit_length() > 16 or z < 0
if any([xbit_check, ybit_check, zbit_check]):
logging.error(
"Unable to build node location message, received lat/long/alt exceeds coordinate "
"space: NEM %s (%d, %d, %d)",
nemid,
x,
y,
z,
)
return False
# generate a node message for this location update
try:
node = self.session.get_node(n)
except CoreError:
logging.exception(
"location event NEM %s has no corresponding node %s", nemid, n
)
return False
# don"t use node.setposition(x,y,z) which generates an event
node.position.set(x, y, z)
node_data = node.data(message_type=0, lat=lat, lon=lon, alt=alt)
self.session.broadcast_node(node_data)
return True
def emanerunning(self, node: CoreNode) -> bool:
"""
Return True if an EMANE process associated with the given node is running,
False otherwise.
"""
args = "pkill -0 -x emane"
try:
node.cmd(args)
result = True
except CoreCommandError:
result = False
return result