def __init__(self,
session,
objid="ctrlnet",
name=None,
prefix=None,
hostid=None,
start=True,
assign_address=True,
updown_script=None,
serverintf=None):
"""
Creates a CtrlNet instance.
:param core.session.Session session: core session instance
:param int objid: node id
:param str name: node namee
:param prefix: control network ipv4 prefix
:param hostid: host id
:param bool start: start flag
:param str assign_address: assigned address
:param str updown_script: updown script
:param serverintf: server interface
:return:
"""
self.prefix = ipaddress.Ipv4Prefix(prefix)
self.hostid = hostid
self.assign_address = assign_address
self.updown_script = updown_script
self.serverintf = serverintf
LxBrNet.__init__(self, session, objid=objid, name=name, start=start)
def ltesession(opt):
"""
Run a test LTE session.
"""
nodeutils.set_node_map(nodemaps.NODES)
session = Ns3Session(1, persistent=True, duration=opt.duration)
lte = session.add_object(cls=Ns3LteNet, name="wlan1")
lte.setsubchannels(range(25), range(50, 100))
if opt.verbose:
ascii_helper = ns.network.AsciiTraceHelper()
stream = ascii_helper.CreateFileStream('/tmp/ns3lte.tr')
lte.lte.EnableAsciiAll(stream)
prefix = ipaddress.Ipv4Prefix("10.0.0.0/16")
mobb = None
nodes = []
for i in xrange(1, opt.numnodes + 1):
node = session.addnode(name="n%d" % i)
mob = ns.mobility.ConstantPositionMobilityModel()
mob.SetPosition(ns.core.Vector3D(10.0 * i, 0.0, 0.0))
if i == 1:
# first node is nodeb
lte.setnodeb(node)
mobb = mob
node.newnetif(lte, ["%s/%s" % (prefix.addr(i), prefix.prefixlen)])
nodes.append(node)
if i == 1:
_tmp, ns3dev = lte.findns3dev(node)
lte.lte.AddMobility(ns3dev.GetPhy(), mob)
if i > 1:
lte.linknodeb(node, nodes[0], mob, mobb)
session.thread = session.run(vis=opt.visualize)
return session
def createbridgedsession(self, numnodes, verbose=False):
""" Build a topology consisting of the given number of LxcNodes
connected to a WLAN.
"""
# IP subnet
prefix = ipaddress.Ipv4Prefix("10.0.0.0/16")
self.session = Session(1)
# emulated network
self.net = self.session.add_object(cls=nodes.WlanNode, name="wlan1")
prev = None
for i in xrange(1, numnodes + 1):
addr = "%s/%s" % (prefix.addr(i), 32)
tmp = self.session.add_object(cls=nodes.CoreNode,
objid=i,
name="n%d" % i)
tmp.newnetif(self.net, [addr])
self.nodes.append(tmp)
self.session.services.addservicestonode(tmp, "router", "IPForward")
self.session.services.bootnodeservices(tmp)
self.staticroutes(i, prefix, numnodes)
# link each node in a chain, with the previous node
if prev:
self.net.link(prev.netif(0), tmp.netif(0))
prev = tmp
def topology(self, numnodes, linkprob, verbose=False):
""" Build a topology consisting of the given number of ManetNodes
connected to a WLAN and probabilty of links and set
the session, WLAN, and node list objects.
"""
# IP subnet
prefix = ipaddress.Ipv4Prefix("10.14.0.0/16")
self.session = Session(1)
# emulated network
self.net = self.session.add_object(cls=nodes.WlanNode)
for i in xrange(1, numnodes + 1):
addr = "%s/%s" % (prefix.addr(i), 32)
tmp = self.session.add_object(cls=ManetNode, ipaddr=addr, objid="%d" % i, name="n%d" % i)
tmp.newnetif(self.net, [addr])
self.nodes.append(tmp)
# connect nodes with probability linkprob
for i in xrange(numnodes):
for j in xrange(i + 1, numnodes):
r = random.random()
if r < linkprob:
if self.verbose:
self.info("linking (%d,%d)" % (i, j))
self.net.link(self.nodes[i].netif(0), self.nodes[j].netif(0))
# force one link to avoid partitions (should check if this is needed)
j = i
while j == i:
j = random.randint(0, numnodes - 1)
if self.verbose:
self.info("linking (%d,%d)" % (i, j))
self.net.link(self.nodes[i].netif(0), self.nodes[j].netif(0))
self.nodes[i].boot()
# run the boot.sh script on all nodes to start Quagga
for i in xrange(numnodes):
self.nodes[i].cmd(["./%s" % self.nodes[i].bootsh])
def wifisession(opt):
"""
Run a test wifi session.
"""
nodeutils.set_node_map(nodemaps.NODES)
session = Ns3Session(1, persistent=True, duration=opt.duration)
session.name = "ns3wifi"
session.filename = session.name + ".py"
session.node_count = str(opt.numnodes + 1)
add_to_server(session)
wifi = session.add_object(cls=Ns3WifiNet, name="wlan1")
wifi.setposition(30, 30, 0)
wifi.phy.Set("RxGain", ns.core.DoubleValue(18.0))
prefix = ipaddress.Ipv4Prefix("10.0.0.0/16")
nodes = []
for i in xrange(1, opt.numnodes + 1):
node = session.addnode(name="n%d" % i)
node.newnetif(wifi, ["%s/%s" % (prefix.addr(i), prefix.prefixlen)])
nodes.append(node)
session.setupconstantmobility()
wifi.usecorepositions()
# PHY tracing
# wifi.phy.EnableAsciiAll("ns3wifi")
session.thread = session.run(vis=False)
return session
def wimaxsession(opt):
"""
Run a test wimax session.
"""
nodeutils.set_node_map(nodemaps.NODES)
session = Ns3Session(1, persistent=True, duration=opt.duration)
wimax = session.add_object(cls=Ns3WimaxNet, name="wlan1")
# wimax.wimax.EnableLogComponents()
prefix = ipaddress.Ipv4Prefix("10.0.0.0/16")
# create one classifier for ICMP (protocol 1) traffic
# src port low/high, dst port low/high, protocol, priority
# classifier = (0, 65000, 0, 65000, 1, 1)
classifier = (0, 65000, 0, 65000, 17, 1)
nodes = []
for i in xrange(1, opt.numnodes + 1):
node = session.addnode(name="n%d" % i)
if i == 1:
wimax.setbasestation(node)
node.newnetif(wimax, ["%s/%s" % (prefix.addr(i), prefix.prefixlen)])
if i > 2:
wimax.addflow(nodes[-1], node, classifier, classifier)
nodes.append(node)
session.setupconstantmobility()
session.thread = session.run(vis=False)
return session
def __init__(self, session, objid="ctrlnet", name=None, prefix=None, hostid=None,
start=True, assign_address=True, updown_script=None, serverintf=None):
self.prefix = ipaddress.Ipv4Prefix(prefix)
self.hostid = hostid
self.assign_address = assign_address
self.updown_script = updown_script
self.serverintf = serverintf
OvsNet.__init__(self, session, objid=objid, name=name, start=start)
def __init__(self, port=CORE_API_PORT):
self.host = "localhost"
self.port = port
address = (self.host, self.port)
self.server = CoreServer(address, CoreHandler, {
"numthreads": 1,
"daemonize": False,
})
self.distributed_server = "core2"
self.prefix = ipaddress.Ipv4Prefix("10.83.0.0/16")
self.session = None
self.request_handler = None
def main():
usagestr = "usage: %prog [-h] [options] [args]"
parser = optparse.OptionParser(usage=usagestr)
parser.set_defaults(numnodes=5)
parser.add_option("-n", "--numnodes", dest="numnodes", type=int,
help="number of nodes")
def usage(msg=None, err=0):
sys.stdout.write("\n")
if msg:
sys.stdout.write(msg + "\n\n")
parser.print_help()
sys.exit(err)
# parse command line options
(options, args) = parser.parse_args()
if options.numnodes < 1:
usage("invalid number of nodes: %s" % options.numnodes)
for a in args:
sys.stderr.write("ignoring command line argument: '%s'\n" % a)
start = datetime.datetime.now()
# IP subnet
prefix = ipaddress.Ipv4Prefix("10.83.0.0/16")
session = Session(1, persistent=True)
if 'server' in globals():
server.addsession(session)
# emulated Ethernet switch
switch = session.add_object(cls=nodes.SwitchNode, name="switch")
switch.setposition(x=80, y=50)
print "creating %d nodes with addresses from %s" % (options.numnodes, prefix)
for i in xrange(1, options.numnodes + 1):
tmp = session.add_object(cls=nodes.CoreNode, name="n%d" % i, objid=i)
tmp.newnetif(switch, ["%s/%s" % (prefix.addr(i), prefix.prefixlen)])
tmp.cmd([constants.SYSCTL_BIN, "net.ipv4.icmp_echo_ignore_broadcasts=0"])
tmp.setposition(x=150 * i, y=150)
n.append(tmp)
session.node_count = str(options.numnodes + 1)
session.instantiate()
print "elapsed time: %s" % (datetime.datetime.now() - start)
# start a shell on node 1
n[1].term("bash")
raw_input("press enter to exit")
session.shutdown()
def generatequaggaconfig(cls, node):
cfg = "router ospf\n"
rtrid = cls.routerid(node)
cfg += " router-id %s\n" % rtrid
# network 10.0.0.0/24 area 0
for ifc in node.netifs():
if hasattr(ifc, 'control') and ifc.control is True:
continue
for a in ifc.addrlist:
if a.find(".") < 0:
continue
net = ipaddress.Ipv4Prefix(a)
cfg += " network %s area 0\n" % net
cfg += "!\n"
return cfg
def test(numnodes, testsec):
# node list
n = []
# IP subnet
prefix = ipaddress.Ipv4Prefix("10.83.0.0/16")
session = Session(1)
# emulated network
net = session.add_object(cls=nodes.SwitchNode)
for i in xrange(1, numnodes + 1):
tmp = session.add_object(cls=nodes.LxcNode, name="n%d" % i)
tmp.newnetif(net, ["%s/%s" % (prefix.addr(i), prefix.prefixlen)])
n.append(tmp)
n[0].cmd(["iperf", "-s", "-D"])
n[-1].icmd(["iperf", "-t", str(int(testsec)), "-c", str(prefix.addr(1))])
n[0].cmd(["killall", "-9", "iperf"])
raw_input("press enter to exit")
session.shutdown()
def createemanesession(self,
numnodes,
verbose=False,
cls=None,
values=None):
""" Build a topology consisting of the given number of LxcNodes
connected to an EMANE WLAN.
"""
prefix = ipaddress.Ipv4Prefix("10.0.0.0/16")
self.session = Session(2)
self.session.node_count = str(numnodes + 1)
self.session.master = True
self.session.location.setrefgeo(47.57917, -122.13232, 2.00000)
self.session.location.refscale = 150.0
self.session.config["emane_models"] = "RfPipe, Ieee80211abg, Bypass"
self.session.emane.loadmodels()
self.net = self.session.add_object(cls=EmaneNode,
objid=numnodes + 1,
name="wlan1")
self.net.verbose = verbose
# self.session.emane.addobj(self.net)
for i in xrange(1, numnodes + 1):
addr = "%s/%s" % (prefix.addr(i), 32)
tmp = self.session.add_object(cls=nodes.CoreNode,
objid=i,
name="n%d" % i)
# tmp.setposition(i * 20, 50, None)
tmp.setposition(50, 50, None)
tmp.newnetif(self.net, [addr])
self.nodes.append(tmp)
self.session.services.addservicestonode(tmp, "router", "IPForward")
if values is None:
values = cls.getdefaultvalues()
self.session.emane.setconfig(self.net.objid, cls.name, values)
self.session.instantiate()
self.info("waiting %s sec (TAP bring-up)" % 2)
time.sleep(2)
for i in xrange(1, numnodes + 1):
tmp = self.nodes[i - 1]
self.session.services.bootnodeservices(tmp)
self.staticroutes(i, prefix, numnodes)
def __init__(self):
# setup nodes
node_map = nodemaps.NODES
nodeutils.set_node_map(node_map)
# load emane services
quagga.load_services()
utility.load_services()
address = ("localhost", CORE_API_PORT)
self.server = CoreServer(address, CoreRequestHandler, {
"numthreads": 1,
"daemonize": False,
})
self.distributed_server = "core2"
self.prefix = ipaddress.Ipv4Prefix("10.83.0.0/16")
self.session = None
self.request_handler = None
def wifisession(opt):
"""
Run a random walk wifi session.
"""
nodeutils.set_node_map(nodemaps.NODES)
session = Ns3Session(1, persistent=True, duration=opt.duration)
session.name = "ns3wifirandomwalk"
session.filename = session.name + ".py"
session.node_count = str(opt.numnodes + 1)
add_to_server(session)
wifi = session.add_object(cls=Ns3WifiNet,
name="wlan1",
rate="OfdmRate12Mbps")
wifi.setposition(30, 30, 0)
# for improved connectivity
wifi.phy.Set("RxGain", ns.core.DoubleValue(18.0))
prefix = ipaddress.Ipv4Prefix("10.0.0.0/16")
services_str = "zebra|OSPFv3MDR|IPForward"
nodes = []
for i in xrange(1, opt.numnodes + 1):
node = session.addnode(name="n%d" % i)
node.newnetif(wifi, ["%s/%s" % (prefix.addr(i), prefix.prefixlen)])
nodes.append(node)
session.services.addservicestonode(node, "router", services_str)
session.services.bootnodeservices(node)
session.setuprandomwalkmobility(bounds=(1000.0, 750.0, 0))
# PHY tracing
# wifi.phy.EnableAsciiAll("ns3wifirandomwalk")
# mobility tracing
# session.setupmobilitytracing(wifi, "ns3wifirandomwalk.mob.tr",
# nodes, verbose=True)
session.startns3mobility(refresh_ms=150)
# start simulation
# session.instantiate() ?
session.thread = session.run(vis=opt.viz)
return session
def test(options):
prefix = ipaddress.Ipv4Prefix("10.83.0.0/16")
session = Session(1, persistent=True)
if options.enablesdt:
# GUI default
session.location.setrefgeo(47.57917, -122.13232, 50.0)
session.location.refscale = 100.0
session.options.enablesdt = True
session.options.sdturl = options.sdturl
wlanid = options.numnodes + 1
net = session.add_object(cls=WlanNode,
name="wlan%d" % wlanid,
objid=wlanid)
values = list(BasicRangeModel.getdefaultvalues())
# values[0] = 5000000 # 5000km range
net.setmodel(BasicRangeModel, values)
for i in xrange(1, options.numnodes + 1):
node = session.add_object(cls=LxcNode, name="n%d" % i, objid=i)
address = "%s/%s" % (prefix.addr(i), prefix.prefixlen)
print "setting node address: %s - %s" % (node.objid, address)
node.newnetif(net, [address])
# set increasing Z coordinates
node.setposition(10, 10, 100)
n.append(node)
# example setting node n2 to a high altitude
# n[1].setposition(10, 10, 2000000) # 2000km
# session.sdt.updatenode(n[1].objid, 0, 10, 10, 2000000)
# launches terminal for the first node
# n[0].term("bash")
n[0].icmd(["ping", "-c", "5", "127.0.0.1"])
# wait for rate seconds to allow ebtables commands to commit
time.sleep(EbtablesQueue.rate)
raw_input("press enter to exit")
session.shutdown()
def main():
usagestr = "usage: %prog [-h] [options] [args]"
parser = optparse.OptionParser(usage=usagestr)
parser.set_defaults(numnodes=5, slave=None)
parser.add_option("-n",
"--numnodes",
dest="numnodes",
type=int,
help="number of nodes")
parser.add_option("-s",
"--slave-server",
dest="slave",
type=str,
help="slave server IP address")
def usage(msg=None, err=0):
sys.stdout.write("\n")
if msg:
sys.stdout.write(msg + "\n\n")
parser.print_help()
sys.exit(err)
# parse command line options
(options, args) = parser.parse_args()
if options.numnodes < 1:
usage("invalid number of nodes: %s" % options.numnodes)
if not options.slave:
usage("slave server IP address (-s) is a required argument")
for a in args:
sys.stderr.write("ignoring command line argument: '%s'\n" % a)
start = datetime.datetime.now()
prefix = ipaddress.Ipv4Prefix("10.83.0.0/16")
session = Session(1)
if 'server' in globals():
server.addsession(session)
# distributed setup - connect to slave server
slaveport = options.slave.split(':')
slave = slaveport[0]
if len(slaveport) > 1:
port = int(slaveport[1])
else:
port = CORE_API_PORT
print "connecting to slave at %s:%d" % (slave, port)
session.broker.addserver(slave, slave, port)
session.broker.setupserver(slave)
session.set_state(EventTypes.CONFIGURATION_STATE)
tlvdata = coreapi.CoreEventTlv.pack(EventTlvs.TYPE.value,
EventTypes.CONFIGURATION_STATE.value)
session.broker.handlerawmsg(coreapi.CoreEventMessage.pack(0, tlvdata))
switch = session.add_object(cls=nodes.SwitchNode, name="switch")
switch.setposition(x=80, y=50)
num_local = options.numnodes / 2
num_remote = options.numnodes / 2 + options.numnodes % 2
print "creating %d (%d local / %d remote) nodes with addresses from %s" % \
(options.numnodes, num_local, num_remote, prefix)
for i in xrange(1, num_local + 1):
node = session.add_object(cls=nodes.CoreNode, name="n%d" % i, objid=i)
node.newnetif(switch, ["%s/%s" % (prefix.addr(i), prefix.prefixlen)])
node.cmd(
[constants.SYSCTL_BIN, "net.ipv4.icmp_echo_ignore_broadcasts=0"])
node.setposition(x=150 * i, y=150)
n.append(node)
flags = MessageFlags.ADD.value
session.broker.handlerawmsg(switch.tonodemsg(flags=flags))
# create remote nodes via API
for i in xrange(num_local + 1, options.numnodes + 1):
node = nodes.CoreNode(session=session,
objid=i,
name="n%d" % i,
start=False)
node.setposition(x=150 * i, y=150)
node.server = slave
n.append(node)
node_data = node.data(flags)
node_message = dataconversion.convert_node(node_data)
session.broker.handlerawmsg(node_message)
# create remote links via API
for i in xrange(num_local + 1, options.numnodes + 1):
tlvdata = coreapi.CoreLinkTlv.pack(LinkTlvs.N1_NUMBER.value,
switch.objid)
tlvdata += coreapi.CoreLinkTlv.pack(LinkTlvs.N2_NUMBER.value, i)
tlvdata += coreapi.CoreLinkTlv.pack(LinkTlvs.TYPE.value,
LinkTypes.WIRED.value)
tlvdata += coreapi.CoreLinkTlv.pack(LinkTlvs.INTERFACE2_NUMBER.value,
0)
tlvdata += coreapi.CoreLinkTlv.pack(LinkTlvs.INTERFACE2_IP4.value,
prefix.addr(i))
tlvdata += coreapi.CoreLinkTlv.pack(LinkTlvs.INTERFACE2_IP4_MASK.value,
prefix.prefixlen)
msg = coreapi.CoreLinkMessage.pack(flags, tlvdata)
session.broker.handlerawmsg(msg)
session.instantiate()
tlvdata = coreapi.CoreEventTlv.pack(EventTlvs.TYPE.value,
EventTypes.INSTANTIATION_STATE.value)
msg = coreapi.CoreEventMessage.pack(0, tlvdata)
session.broker.handlerawmsg(msg)
# start a shell on node 1
n[1].client.term("bash")
print "elapsed time: %s" % (datetime.datetime.now() - start)
print "To stop this session, use the 'core-cleanup' script on this server"
print "and on the remote slave server."
def main():
usagestr = "usage: %prog [-h] [options] [args]"
parser = optparse.OptionParser(usage=usagestr)
parser.set_defaults(numnodes=5)
parser.add_option("-n",
"--numnodes",
dest="numnodes",
type=int,
help="number of nodes")
def usage(msg=None, err=0):
sys.stdout.write("\n")
if msg:
sys.stdout.write(msg + "\n\n")
parser.print_help()
sys.exit(err)
# parse command line options
(options, args) = parser.parse_args()
if options.numnodes < 1:
usage("invalid number of nodes: %s" % options.numnodes)
for a in args:
sys.stderr.write("ignoring command line argument: '%s'\n" % a)
start = datetime.datetime.now()
# IP subnet
prefix = ipaddress.Ipv4Prefix("10.83.0.0/16")
# session with some EMANE initialization
cfg = {'verbose': 'false'}
session = Session(1, config=cfg, persistent=True)
session.master = True
session.location.setrefgeo(47.57917, -122.13232, 2.00000)
session.location.refscale = 150.0
session.config['emane_models'] = "RfPipe, Ieee80211abg, Bypass"
session.emane.loadmodels()
if 'server' in globals():
server.addsession(session)
# EMANE WLAN
print "creating EMANE WLAN wlan1"
wlan = session.add_object(cls=EmaneNode, name="wlan1")
wlan.setposition(x=80, y=50)
names = EmaneIeee80211abgModel.getnames()
values = list(EmaneIeee80211abgModel.getdefaultvalues())
# TODO: change any of the EMANE 802.11 parameter values here
for i in range(0, len(names)):
print "EMANE 80211 \"%s\" = \"%s\"" % (names[i], values[i])
try:
values[names.index('pathlossmode')] = '2ray'
except ValueError:
values[names.index('propagationmodel')] = '2ray'
session.emane.setconfig(wlan.objid, EmaneIeee80211abgModel.name, values)
services_str = "zebra|OSPFv3MDR|IPForward"
print "creating %d nodes with addresses from %s" % \
(options.numnodes, prefix)
for i in xrange(1, options.numnodes + 1):
tmp = session.add_object(cls=nodes.CoreNode, name="n%d" % i, objid=i)
tmp.newnetif(wlan, ["%s/%s" % (prefix.addr(i), prefix.prefixlen)])
tmp.cmd(
[constants.SYSCTL_BIN, "net.ipv4.icmp_echo_ignore_broadcasts=0"])
tmp.setposition(x=150 * i, y=150)
session.services.addservicestonode(tmp, "", services_str)
n.append(tmp)
# this starts EMANE, etc.
session.node_count = str(options.numnodes + 1)
session.instantiate()
# start a shell on node 1
n[1].term("bash")
print "elapsed time: %s" % (datetime.datetime.now() - start)
def test_broker(self, cored):
"""
Test session broker creation.
:param core.emulator.coreemu.EmuSession session: session for test
:param cored: cored daemon server to test with
"""
# set core daemon to run in the background
thread = threading.Thread(target=cored.server.serve_forever)
thread.daemon = True
thread.start()
# ip prefix for nodes
prefix = ipaddress.Ipv4Prefix("10.83.0.0/16")
daemon = "localhost"
# add server
session = cored.server.coreemu.create_session()
session.broker.addserver(daemon, "127.0.0.1", CORE_API_PORT)
# setup server
session.broker.setupserver(daemon)
# do not want the recvloop running as we will deal ourselves
session.broker.dorecvloop = False
# have broker handle a configuration state change
session.set_state(EventTypes.CONFIGURATION_STATE)
event_message = state_message(EventTypes.CONFIGURATION_STATE)
session.broker.handlerawmsg(event_message)
# create a switch node
switch = session.add_node(_type=NodeTypes.SWITCH)
switch.setposition(x=80, y=50)
switch.server = daemon
# retrieve switch data representation, create a switch message for broker to handle
switch_data = switch.data(MessageFlags.ADD.value)
switch_message = dataconversion.convert_node(switch_data)
session.broker.handlerawmsg(switch_message)
# create node one
node_one = session.add_node()
node_one.server = daemon
# create node two
node_two = session.add_node()
node_two.server = daemon
# create node messages for the broker to handle
for node in [node_one, node_two]:
node_data = node.data(MessageFlags.ADD.value)
node_message = dataconversion.convert_node(node_data)
session.broker.handlerawmsg(node_message)
# create links to switch from nodes for broker to handle
for index, node in enumerate([node_one, node_two], start=1):
ip4_address = prefix.addr(index)
link_message = switch_link_message(switch, node, ip4_address,
prefix.prefixlen)
session.broker.handlerawmsg(link_message)
# change session to instantiation state
event_message = state_message(EventTypes.INSTANTIATION_STATE)
session.broker.handlerawmsg(event_message)
# Get the ip or last node and ping it from the first
output, status = run_cmd(node_one, "ip -4 -o addr show dev eth0")
pingip = output.split()[3].split("/")[0]
output, status = run_cmd(node_two, "ping -c 5 " + pingip)
assert not status
def main():
usagestr = "usage: %prog [-h] [options] [args]"
parser = optparse.OptionParser(usage=usagestr)
parser.set_defaults(waittime=0.2,
numnodes=0,
bridges=0,
retries=0,
logfile=None,
services=None)
parser.add_option("-w", "--waittime", dest="waittime", type=float,
help="number of seconds to wait between node creation" \
" (default = %s)" % parser.defaults["waittime"])
parser.add_option("-n",
"--numnodes",
dest="numnodes",
type=int,
help="number of nodes (default = unlimited)")
parser.add_option("-b", "--bridges", dest="bridges", type=int,
help="number of nodes per bridge; 0 = one bridge " \
"(def. = %s)" % parser.defaults["bridges"])
parser.add_option("-r", "--retry", dest="retries", type=int,
help="number of retries on error (default = %s)" % \
parser.defaults["retries"])
parser.add_option("-l", "--log", dest="logfile", type=str,
help="log memory usage to this file (default = %s)" % \
parser.defaults["logfile"])
parser.add_option("-s",
"--services",
dest="services",
type=str,
help="pipe-delimited list of services added to each "
"node (default = %s)\n(Example: zebra|OSPFv2|OSPFv3|"
"IPForward)" % parser.defaults["services"])
def usage(msg=None, err=0):
sys.stdout.write("\n")
if msg:
sys.stdout.write(msg + "\n\n")
parser.print_help()
sys.exit(err)
(options, args) = parser.parse_args()
for a in args:
sys.stderr.write("ignoring command line argument: %s\n" % a)
start = datetime.datetime.now()
prefix = ipaddress.Ipv4Prefix("10.83.0.0/16")
print "Testing how many network namespace nodes this machine can create."
print " - %s" % linuxversion()
mem = memfree()
print " - %.02f GB total memory (%.02f GB swap)" % \
(mem["total"] / GBD, mem["stotal"] / GBD)
print " - using IPv4 network prefix %s" % prefix
print " - using wait time of %s" % options.waittime
print " - using %d nodes per bridge" % options.bridges
print " - will retry %d times on failure" % options.retries
print " - adding these services to each node: %s" % options.services
print " "
lfp = None
if options.logfile is not None:
# initialize a csv log file header
lfp = open(options.logfile, "a")
lfp.write("# log from howmanynodes.py %s\n" % time.ctime())
lfp.write("# options = %s\n#\n" % options)
lfp.write("# numnodes,%s\n" % ",".join(MEMKEYS))
lfp.flush()
session = Session(1, persistent=True)
switch = session.add_object(cls=nodes.SwitchNode)
switchlist.append(switch)
print "Added bridge %s (%d)." % (switch.brname, len(switchlist))
i = 0
retry_count = options.retries
while True:
i += 1
# optionally add a bridge (options.bridges nodes per bridge)
try:
if options.bridges > 0 and switch.numnetif() >= options.bridges:
switch = session.add_object(cls=nodes.SwitchNode)
switchlist.append(switch)
print "\nAdded bridge %s (%d) for node %d." % \
(switch.brname, len(switchlist), i)
except Exception, e:
print "At %d bridges (%d nodes) caught exception:\n%s\n" % \
(len(switchlist), i - 1, e)
break
# create a node
try:
n = session.add_object(cls=nodes.LxcNode, name="n%d" % i)
n.newnetif(switch, ["%s/%s" % (prefix.addr(i), prefix.prefixlen)])
n.cmd([
constants.SYSCTL_BIN, "net.ipv4.icmp_echo_ignore_broadcasts=0"
])
if options.services is not None:
session.services.addservicestonode(n, "", options.services)
n.boot()
nodelist.append(n)
if i % 25 == 0:
print "\n%s nodes created " % i,
mem = memfree()
free = mem["free"] + mem["buff"] + mem["cached"]
swap = mem["stotal"] - mem["sfree"]
print "(%.02f/%.02f GB free/swap)" % (free / GBD, swap / GBD),
if lfp:
lfp.write("%d," % i)
lfp.write("%s\n" % ",".join(str(mem[x]) for x in MEMKEYS))
lfp.flush()
else:
sys.stdout.write(".")
sys.stdout.flush()
time.sleep(options.waittime)
except Exception, e:
print "At %d nodes caught exception:\n" % i, e
if retry_count > 0:
print "\nWill retry creating node %d." % i
shutil.rmtree(n.nodedir, ignore_errors=True)
retry_count -= 1
i -= 1
time.sleep(options.waittime)
continue
else:
print "Stopping at %d nodes!" % i
break
def ip_prefix():
return ipaddress.Ipv4Prefix("10.83.0.0/16")
def __init__(self, prefix=None, gw=None, metric=None):
try:
self.prefix = ipaddress.Ipv4Prefix(prefix)
except Exception, e:
raise ValueError, "Invalid prefix given to Route object: %s\n%s" % \
(prefix, e)
def main():
usagestr = "usage: %prog [-n] number of nodes [-d] daemon address"
parser = optparse.OptionParser(usage=usagestr)
parser.set_defaults(numnodes=5, daemon="127.0.0.1:" + str(CORE_API_PORT))
parser.add_option("-n",
"--numnodes",
dest="numnodes",
type=int,
help="number of nodes")
parser.add_option("-d",
"--daemon-server",
dest="daemon",
type=str,
help="daemon server IP address")
def usage(msg=None, err=0):
sys.stdout.write("\n")
if msg:
sys.stdout.write(msg + "\n\n")
parser.print_help()
sys.exit(err)
# parse command line options
(options, args) = parser.parse_args()
if options.numnodes < 1:
usage("invalid number of nodes: %s" % options.numnodes)
if not options.daemon:
usage("daemon server IP address (-d) is a required argument")
for a in args:
sys.stderr.write("ignoring command line argument: %s\n" % a)
start = datetime.datetime.now()
prefix = ipaddress.Ipv4Prefix("10.83.0.0/16")
session = Session(1)
if "server" in globals():
server.addsession(session)
# distributed setup - connect to daemon server
daemonport = options.daemon.split(":")
daemonip = daemonport[0]
# Localhost is already set in the session but we change it to be the remote daemon
# This stops the remote daemon trying to build a tunnel back which would fail
daemon = "localhost"
if len(daemonport) > 1:
port = int(daemonport[1])
else:
port = CORE_API_PORT
print "connecting to daemon at %s:%d" % (daemon, port)
session.broker.addserver(daemon, daemonip, port)
# Set the local session id to match the port.
# Not necessary but seems neater.
session.broker.setupserver(daemon)
# We do not want the recvloop running as we will deal ourselves
session.broker.dorecvloop = False
# Change to configuration state on both machines
session.set_state(EventTypes.CONFIGURATION_STATE)
tlvdata = coreapi.CoreEventTlv.pack(EventTlvs.TYPE.value,
EventTypes.CONFIGURATION_STATE.value)
session.broker.handlerawmsg(coreapi.CoreEventMessage.pack(0, tlvdata))
flags = MessageFlags.ADD.value
switch = nodes.SwitchNode(session=session, name="switch", start=False)
switch.setposition(x=80, y=50)
switch.server = daemon
switch_data = switch.data(flags)
switch_message = dataconversion.convert_node(switch_data)
session.broker.handlerawmsg(switch_message)
number_of_nodes = options.numnodes
print "creating %d remote nodes with addresses from %s" % (
options.numnodes, prefix)
# create remote nodes via API
for i in xrange(1, number_of_nodes + 1):
node = nodes.CoreNode(session=session,
objid=i,
name="n%d" % i,
start=False)
node.setposition(x=150 * i, y=150)
node.server = daemon
node_data = node.data(flags)
node_message = dataconversion.convert_node(node_data)
session.broker.handlerawmsg(node_message)
n.append(node)
# create remote links via API
for i in xrange(1, number_of_nodes + 1):
tlvdata = coreapi.CoreLinkTlv.pack(LinkTlvs.N1_NUMBER.value,
switch.objid)
tlvdata += coreapi.CoreLinkTlv.pack(LinkTlvs.N2_NUMBER.value, i)
tlvdata += coreapi.CoreLinkTlv.pack(LinkTlvs.TYPE.value,
LinkTypes.WIRED.value)
tlvdata += coreapi.CoreLinkTlv.pack(LinkTlvs.INTERFACE2_NUMBER.value,
0)
tlvdata += coreapi.CoreLinkTlv.pack(LinkTlvs.INTERFACE2_IP4.value,
prefix.addr(i))
tlvdata += coreapi.CoreLinkTlv.pack(LinkTlvs.INTERFACE2_IP4_MASK.value,
prefix.prefixlen)
msg = coreapi.CoreLinkMessage.pack(flags, tlvdata)
session.broker.handlerawmsg(msg)
# We change the daemon to Instantiation state
# We do not change the local session as it would try and build a tunnel and fail
tlvdata = coreapi.CoreEventTlv.pack(EventTlvs.TYPE.value,
EventTypes.INSTANTIATION_STATE.value)
msg = coreapi.CoreEventMessage.pack(0, tlvdata)
session.broker.handlerawmsg(msg)
# Get the ip or last node and ping it from the first
print "Pinging from the first to the last node"
pingip = cmd(n[-1], "ip -4 -o addr show dev eth0").split()[3].split("/")[0]
print cmd(n[1], "ping -c 5 " + pingip)
print "elapsed time: %s" % (datetime.datetime.now() - start)
print "To stop this session, use the core-cleanup script on the remote daemon server."
raw_input("press enter to exit")
def main():
usagestr = "usage: %prog [-h] [options] [args]"
parser = optparse.OptionParser(usage=usagestr)
parser.set_defaults(numnodes=5)
parser.add_option("-n", "--numnodes", dest="numnodes", type=int,
help="number of nodes")
def usage(msg=None, err=0):
sys.stdout.write("\n")
if msg:
sys.stdout.write(msg + "\n\n")
parser.print_help()
sys.exit(err)
# parse command line options
(options, args) = parser.parse_args()
if options.numnodes < 1:
usage("invalid number of nodes: %s" % options.numnodes)
if options.numnodes >= 255:
usage("invalid number of nodes: %s" % options.numnodes)
for a in args:
sys.stderr.write("ignoring command line argument: '%s'\n" % a)
start = datetime.datetime.now()
session = Session(1, persistent=True)
if 'server' in globals():
server.addsession(session)
print "creating %d nodes" % options.numnodes
left = None
prefix = None
for i in xrange(1, options.numnodes + 1):
tmp = session.add_object(cls=nodes.CoreNode, name="n%d" % i, objid=i)
if left:
tmp.newnetif(left, ["%s/%s" % (prefix.addr(2), prefix.prefixlen)])
# limit: i < 255
prefix = ipaddress.Ipv4Prefix("10.83.%d.0/24" % i)
right = session.add_object(cls=nodes.PtpNet)
tmp.newnetif(right, ["%s/%s" % (prefix.addr(1), prefix.prefixlen)])
tmp.cmd([constants.SYSCTL_BIN, "net.ipv4.icmp_echo_ignore_broadcasts=0"])
tmp.cmd([constants.SYSCTL_BIN, "net.ipv4.conf.all.forwarding=1"])
tmp.cmd([constants.SYSCTL_BIN, "net.ipv4.conf.default.rp_filter=0"])
tmp.setposition(x=100 * i, y=150)
n.append(tmp)
left = right
prefixes = map(lambda (x): ipaddress.Ipv4Prefix("10.83.%d.0/24" % x),
xrange(1, options.numnodes + 1))
# set up static routing in the chain
for i in xrange(1, options.numnodes + 1):
for j in xrange(1, options.numnodes + 1):
if j < i - 1:
gw = prefixes[i - 2].addr(1)
elif j > i:
if i > len(prefixes) - 1:
continue
gw = prefixes[i - 1].addr(2)
else:
continue
net = prefixes[j - 1]
n[i].cmd([constants.IP_BIN, "route", "add", str(net), "via", str(gw)])
print "elapsed time: %s" % (datetime.datetime.now() - start)
