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source: fedd/federation/experiment_partition.py @ 56816c9

axis_examplecompt_changesinfo-opsversion-3.01version-3.02

Last change on this file since 56816c9 was 88dd6cc, checked in by Ted Faber <faber@…>, 14 years ago
A little defensive programming
Property mode set to `100644`
File size: 19.1 KB

Rev	Line
[73e7f5c]	1	#!/usr/local/bin/python
	2
	3	import os,sys
	4
	5	import re
	6	import random
	7	import string
	8	import subprocess
	9	import tempfile
	10	import copy
	11	import pickle
	12	import logging
	13	import signal
	14	import time
	15
	16	import traceback
	17	# For parsing visualization output and splitter output
	18	import xml.parsers.expat
	19
	20	from threading import Lock, Thread, Condition
	21	from subprocess import call, Popen, PIPE
	22
	23	from urlparse import urlparse
	24	from urllib2 import urlopen
	25
	26	from util import *
	27	from fedid import fedid, generate_fedid
	28	from remote_service import xmlrpc_handler, soap_handler, service_caller
	29	from service_error import service_error
	30	from synch_store import synch_store
	31
	32	import topdl
	33	import list_log
	34	from ip_allocator import ip_allocator
	35	from ip_addr import ip_addr
	36
	37
	38	class nullHandler(logging.Handler):
	39	def emit(self, record): pass
	40
	41	fl = logging.getLogger("fedd.experiment_control")
	42	fl.addHandler(nullHandler())
	43
	44	class experiment_partition:
[175b444]	45	def __init__(self, auth=None, store_url=None, tbmap=None, muxmax=2,
	46	direct_transit=None):
[73e7f5c]	47	"""
	48	Intialize the various attributes
	49	"""
	50
	51	self.log = logging.getLogger("fedd.experiment_control." + \
	52	"experiment_paritition")
	53	self.auth = auth
	54	self.store_url = store_url
	55	self.tbmap = tbmap
[175b444]	56	self.direct_transit = direct_transit or [ ]
[73e7f5c]	57	self.muxmax = muxmax
	58
	59
[5f96438]	60	def new_portal_node(self, st, dt, tbparams, masters, eid, myname, desthost,
[73e7f5c]	61	portal_type, iface_desc=(), conn_type="ssh", conn_attrs=[],
	62	expid=None):
	63	"""
	64	Return a new internet portal node and a dict with the connectionInfo to
	65	be attached.
	66	"""
[5f96438]	67	seer_master = None
[43197eb]	68	for m in masters.values():
	69	for s in m:
	70	if s.name == 'SEER':
	71	seer_master = m
	72	break
	73	if seer_master: break
[5f96438]	74
	75	if seer_master:
	76	mdomain = tbparams[seer_master].get('domain', '.example.com')
	77	mproject = tbparams[seer_master].get('project', 'project')
	78	muser = tbparams[seer_master].get('user', 'root')
	79	smbshare = tbparams[seer_master].get('smbshare', 'USERS')
	80	else:
	81	mdomain = '.example.com'
	82	mproject = 'project'
	83	muser = 'root'
	84	smbshare = 'USERS'
	85
[73e7f5c]	86	dproject = tbparams[dt].get('project', 'project')
[0c4b12c]	87	ddomain = tbparams[dt].get('domain', '.example.com')
[73e7f5c]	88
[5f96438]	89	if (st in masters and dt not in masters) or \
[43197eb]	90	( st not in masters and dt in masters ):
[5f96438]	91	active = ("%s" % (st in masters))
[73e7f5c]	92	else:
	93	active = ("%s" % (st > dt))
	94
	95	ifaces = [ ]
	96	for sub, attrs in iface_desc:
	97	inf = topdl.Interface(
	98	name="inf%03d" % len(ifaces),
	99	substrate=sub,
	100	attribute=[
	101	topdl.Attribute(
	102	attribute=n,
	103	value = v)
	104	for n, v in attrs
	105	]
	106	)
	107	ifaces.append(inf)
	108	if conn_type == "ssh":
	109	try:
	110	aid = tbparams[st]['allocID']['fedid']
	111	except:
	112	self.log.debug("[new_portal_node] Can't get alloc id for %s?" \
	113	% st)
	114	aid = None
	115	info = {
	116	"type" : conn_type,
	117	"portal": myname,
	118	'fedAttr': [
	119	{ 'attribute': 'masterdomain', 'value': mdomain},
	120	{ 'attribute': 'masterexperiment', 'value':
	121	"%s/%s" % (mproject, eid)},
	122	{ 'attribute': 'active', 'value': active},
	123	# Move to SMB service description
	124	{ 'attribute': 'masteruser', 'value': muser},
	125	{ 'attribute': 'smbshare', 'value': smbshare},
	126	],
	127	'parameter': [
	128	{
	129	'name': 'peer',
	130	'key': 'fedid:%s/%s' % (expid, myname),
	131	'store': self.store_url,
	132	'type': 'output',
	133	},
	134	{
	135	'name': 'ssh_port',
	136	'key': 'fedid:%s/%s-port' % (expid, myname),
	137	'store': self.store_url,
	138	'type': 'output',
	139	},
	140	{
	141	'name': 'peer',
	142	'key': 'fedid:%s/%s' % (expid, desthost),
	143	'store': self.store_url,
	144	'type': 'input',
	145	},
	146	{
	147	'name': 'ssh_port',
	148	'key': 'fedid:%s/%s-port' % (expid, desthost),
	149	'store': self.store_url,
	150	'type': 'input',
	151	},
	152	]
	153	}
	154	# Give this allocation the rights to access the key of the
	155	# peers
	156	if aid:
	157	for h in (myname, desthost):
	158	self.auth.set_attribute(aid, 'fedid:%s/%s' % (expid, h))
	159	self.auth.set_attribute(aid, 'fedid:%s/%s-port' % \
	160	(expid, h))
	161	else:
	162	self.log.error("No aid for %s in new_portal_node" % st)
	163	else:
	164	info = None
	165
	166	return (topdl.Computer(
	167	name=myname,
	168	attribute=[
	169	topdl.Attribute(attribute=n,value=v)
	170	for n, v in (\
	171	('portal', 'true'),
	172	('portal_type', portal_type),
[0c4b12c]	173	('destination_testbed', dt),
[73e7f5c]	174	)
	175	],
	176	interface=ifaces,
	177	), info)
	178
	179	def new_portal_substrate(self, st, dt, eid, tbparams, expid):
	180	ddomain = tbparams[dt].get('domain', ".example.com")
	181	dproject = tbparams[dt].get('project', 'project')
	182	tsubstrate = \
	183	topdl.Substrate(name='%s-%s' % (st, dt),
	184	attribute= [
	185	topdl.Attribute(
	186	attribute='portal',
	187	value='true')
	188	]
	189	)
	190	segment_element = topdl.Segment(
	191	id= tbparams[dt]['allocID'],
	192	type='emulab',
[f3803ea]	193	uri = self.tbmap.get(testbed_base(dt), None),
[73e7f5c]	194	interface=[
	195	topdl.Interface(
	196	substrate=tsubstrate.name),
	197	],
	198	attribute = [
	199	topdl.Attribute(attribute=n, value=v)
	200	for n, v in (\
	201	('domain', ddomain),
	202	('experiment', "%s/%s" % \
	203	(dproject, eid)),)
	204	],
	205	)
	206
	207	return (tsubstrate, segment_element)
	208
[175b444]	209	def new_direct_topo(self, idx, sub, topo, tbs, tbparams, connInfo, expid,
	210	tb_name):
[73e7f5c]	211	if sub.capacity is None:
	212	raise service_error(service_error.internal,
[fefa026]	213	"Cannot direct split substrate w/o capacity")
[73e7f5c]	214	segs = [ ]
[175b444]	215	name = join_testbed(tb_name, "%d" % idx)
[ab847bc]	216	substr = topdl.Substrate(name=name,
[73e7f5c]	217	capacity=sub.capacity.clone(),
	218	attribute=[ topdl.Attribute(attribute=n, value=v)
	219	for n, v, in (\
	220	('vlan', 'unassigned%d' % idx),)])
	221	store_key = 'fedid:%s/vlan%d' % (expid, idx)
	222	for tb in tbs.keys():
	223	seg = topdl.Segment(
	224	id = tbparams[tb]['allocID'],
	225	type='emulab',
[f3803ea]	226	uri = self.tbmap.get(testbed_base(tb), None),
[73e7f5c]	227	interface=[
	228	topdl.Interface(
	229	substrate=substr.name),
	230	],
	231	attribute=[ topdl.Attribute(
[175b444]	232	attribute='%s_endpoint' % tb_name,
	233	value=tbparams[tb][tb_name]),
[73e7f5c]	234	]
	235	)
[175b444]	236	vlan_key = "%s_vlans" % tb_name
	237	if vlan_key in tbparams[tb]:
	238	seg.set_attribute(vlan_key, tbparams[tb][vlan_key])
[73e7f5c]	239	segs.append(seg)
	240
	241	# Give this allocation the rights to access the key of the
	242	# vlan_id
	243	try:
	244	aid = tbparams[tb]['allocID']['fedid']
	245	self.auth.set_attribute(aid, store_key)
	246	except:
[175b444]	247	self.log.debug("[new_direct_topo] Can't get alloc id for %s?"\
[73e7f5c]	248	% tb)
	249
	250	connInfo[name] = [ {
	251	'type': 'transit',
	252	'parameter': [ {
	253	'name': 'vlan_id',
	254	'key': store_key,
	255	'store': self.store_url,
	256	'type': 'output'
	257	} ]
	258	} ]
	259
	260	topo[name] = \
	261	topdl.Topology(substrates=[substr], elements=segs,
	262	attribute=[
	263	topdl.Attribute(attribute="transit", value='true'),
	264	topdl.Attribute(attribute="dynamic", value='true'),
[175b444]	265	topdl.Attribute(attribute="testbed", value=tb_name),
[73e7f5c]	266	topdl.Attribute(attribute="store_keys",
	267	value=store_key),
	268	]
	269	)
	270
[175b444]	271	def create_direct_substrate(self, sub, topo, tbs, tbparams, masters, eid,
	272	connInfo, expid=None, tb_name=None):
[73e7f5c]	273	"""
[b3227fd]	274	Create connection information that tells which nodes are to be
	275	connected to direct transits, and create an additional topology with
	276	just the interconnected segments and a substrate.
[73e7f5c]	277	"""
	278
	279	def get_substrate_from_topo(name, t):
	280	for s in t.substrates:
	281	if s.name == name: return s
	282	else: return None
	283
	284
[5f96438]	285	seer_master = None
[43197eb]	286	for m in masters.values():
	287	for s in m:
	288	if s.name == 'SEER':
	289	seer_master = m
	290	break
	291	if seer_master: break
[5f96438]	292
	293	if seer_master:
	294	mdomain = tbparams[seer_master].get('domain', '.example.com')
	295	mproject = tbparams[seer_master].get('project', 'project')
	296	else:
	297	mdomain = '.example.com'
	298	mproject = 'project'
	299
[175b444]	300	# dn is the number of previously created direct nets on this direct
	301	# testbed. This routine creates a net numbered by dn
	302	dn = len([x for x in topo.keys() if x.startswith(tb_name)])
[73e7f5c]	303
[175b444]	304	# Set the attributes in the copies that will allow setup of direct
[73e7f5c]	305	# connections.
	306	for tb in tbs.keys():
	307	s = get_substrate_from_topo(sub.name, topo[tb])
	308	if s:
	309	if not connInfo.has_key(tb):
	310	connInfo[tb] = [ ]
	311
	312	try:
	313	aid = tbparams[tb]['allocID']['fedid']
	314	except:
[175b444]	315	self.log.debug("[create_direct_substrate] " +
[73e7f5c]	316	"Can't get alloc id for %s?" %tb)
	317	aid = None
	318
	319	# This may need another look, but only a service gateway will
	320	# look at the active parameter, and these are only inserted to
[5f96438]	321	# connect to a master.
	322	active = "%s" % ( tb in masters)
[73e7f5c]	323	info = {
	324	'type': 'transit',
	325	'member': [ {
[1e7f268]	326	'element': i.element.name,
[73e7f5c]	327	'interface': i.name
	328	} for i in s.interfaces \
	329	if isinstance(i.element, topdl.Computer) ],
	330	'fedAttr': [
	331	{ 'attribute': 'masterdomain', 'value': mdomain},
	332	{ 'attribute': 'masterexperiment', 'value':
	333	"%s/%s" % (mproject, eid)},
	334	{ 'attribute': 'active', 'value': active},
	335	],
	336	'parameter': [ {
	337	'name': 'vlan_id',
	338	'key': 'fedid:%s/vlan%d' % (expid, dn),
	339	'store': self.store_url,
	340	'type': 'input',
	341	} ]
	342	}
	343	if tbs.has_key(tb):
	344	info['peer'] = tbs[tb]
	345	connInfo[tb].append(info)
	346
	347	# Give this allocation the rights to access the key of the
	348	# vlan_id
	349	if aid:
	350	self.auth.set_attribute(aid,
	351	'fedid:%s/vlan%d' % (expid, dn))
	352	else:
	353	raise service_error(service_error.internal,
	354	"No substrate %s in testbed %s" % (sub.name, tb))
	355
[175b444]	356	self.new_direct_topo(dn, sub, topo, tbs, tbparams, connInfo, expid,
	357	tb_name)
[73e7f5c]	358
[5f96438]	359	def insert_internet_portals(self, sub, topo, tbs, tbparams, masters, eid,
[73e7f5c]	360	segment_substrate, portals, connInfo, expid):
	361	# More than one testbed is on this substrate. Insert
	362	# some portals into the subtopologies. st == source testbed,
	363	# dt == destination testbed.
	364	for st in tbs.keys():
	365	if not segment_substrate.has_key(st):
	366	segment_substrate[st] = { }
	367	if not portals.has_key(st):
	368	portals[st] = { }
	369	if not connInfo.has_key(st):
	370	connInfo[st] = [ ]
	371	for dt in [ t for t in tbs.keys() if t != st]:
	372	sproject = tbparams[st].get('project', 'project')
	373	dproject = tbparams[dt].get('project', 'project')
	374	sdomain = tbparams[st].get('domain', ".example.com")
	375	ddomain = tbparams[dt].get('domain', ".example.com")
	376	aid = tbparams[dt]['allocID']['fedid']
[5f96438]	377
	378	seer_master = None
[43197eb]	379
	380	for m in masters.values():
	381	for s in m:
	382	if s.name == 'SEER':
	383	seer_master = m
	384	break
	385	if seer_master: break
[5f96438]	386
	387	if seer_master:
	388	mdomain = tbparams[seer_master].get('domain', '.example.com')
	389	mproject = tbparams[seer_master].get('project', 'project')
	390	muser = tbparams[seer_master].get('user', 'root')
	391	smbshare = tbparams[seer_master].get('smbshare', 'USERS')
	392	else:
	393	mdomain = '.example.com'
	394	mproject = 'project'
	395	muser = 'root'
	396	smbshare = 'USERS'
	397
	398	if (st in masters and dt not in masters) or \
	399	(st not in masters and dt in masters):
	400	active = ("%s" % (st in masters))
[73e7f5c]	401	else:
	402	active = ("%s" %(st > dt))
[5f96438]	403
[73e7f5c]	404	if not segment_substrate[st].has_key(dt):
	405	# Put a substrate and a segment for the connected
	406	# testbed in there.
	407	tsubstrate, segment_element = \
	408	self.new_portal_substrate(st, dt, eid, tbparams,
	409	expid)
	410	segment_substrate[st][dt] = tsubstrate
	411	topo[st].substrates.append(tsubstrate)
	412	topo[st].elements.append(segment_element)
	413
	414	new_portal = False
[0ea75d2]	415	if testbed_suffix(dt): dname = "-".join(split_testbed(dt))
	416	else: dname = dt
	417
	418	if testbed_suffix(st): sname = "-".join(split_testbed(st))
	419	else: sname = st
	420
[73e7f5c]	421	if portals[st].has_key(dt):
	422	# There's a portal set up to go to this destination.
	423	# See if there's room to multiplex this connection on
	424	# it. If so, add an interface to the portal; if not,
	425	# set up to add a portal below.
	426	# [This little festival of braces is just a pop of the
	427	# last element in the list of portals between st and
	428	# dt.]
	429	portal = portals[st][dt][-1]
	430	mux = len([ i for i in portal.interface \
	431	if not i.get_attribute('portal')])
	432	if mux == self.muxmax:
	433	new_portal = True
	434	portal_type = "experiment"
[f3803ea]	435	myname = "%stunnel%d" % (dname.lower(),
	436	len(portals[st][dt]))
	437	desthost = "%stunnel%d" % (sname.lower(),
[73e7f5c]	438	len(portals[st][dt]))
	439	else:
	440	new_i = topdl.Interface(
	441	substrate=sub.name,
	442	attribute=[
	443	topdl.Attribute(
	444	attribute='ip4_address',
	445	value=tbs[dt]
	446	)
	447	])
	448	portal.interface.append(new_i)
	449	else:
	450	# First connection to this testbed, make an empty list
	451	# and set up to add the new portal below
	452	new_portal = True
	453	portals[st][dt] = [ ]
[f3803ea]	454	myname = "%stunnel%d" % (dname.lower(),
	455	len(portals[st][dt]))
	456	desthost = "%stunnel%d" % (sname.lower(),
	457	len(portals[st][dt]))
[73e7f5c]	458
[5f96438]	459	if dt in masters or st in masters: portal_type = "both"
[73e7f5c]	460	else: portal_type = "experiment"
	461
	462	if new_portal:
	463	infs = (
	464	(segment_substrate[st][dt].name,
	465	(('portal', 'true'),)),
	466	(sub.name,
	467	(('ip4_address', tbs[dt]),))
	468	)
	469	portal, info = self.new_portal_node(st, dt, tbparams,
[5f96438]	470	masters, eid, myname, desthost, portal_type,
[73e7f5c]	471	infs, conn_type="ssh", conn_attrs=[], expid=expid)
	472
	473	topo[st].elements.append(portal)
	474	portals[st][dt].append(portal)
	475	connInfo[st].append(info)
	476
[0c4b12c]	477	def add_control_portal(self, st, dt, masters, eid, topo, tbparams,
	478	connInfo, expid):
[73e7f5c]	479	# Add to the master testbed
	480	tsubstrate, segment_element = \
	481	self.new_portal_substrate(st, dt, eid, tbparams, expid)
	482	myname = "%stunnel" % dt
	483	desthost = "%stunnel" % st
	484
[5f96438]	485	portal, info = self.new_portal_node(st, dt, tbparams, masters,
[73e7f5c]	486	eid, myname, desthost, "control",
	487	((tsubstrate.name,(('portal','true'),)),), conn_type="ssh",
	488	conn_attrs=[], expid=expid)
	489
	490	topo[st].substrates.append(tsubstrate)
	491	topo[st].elements.append(segment_element)
	492	topo[st].elements.append(portal)
	493	if not connInfo.has_key(st):
	494	connInfo[st] = [ ]
	495	connInfo[st].append(info)
	496
[175b444]	497	def new_direct_portal(self, st, dt, masters, eid, myip, dip, idx,
	498	substrate, tbparams, expid, tb_name):
[73e7f5c]	499	# Add to the master testbed
[0863dd1]	500	if testbed_suffix(dt): myname = "%stunnel" % "-".join(split_testbed(dt))
	501	else: myname = "%stunnel" % dt
	502
[73e7f5c]	503	desthost = "%s" % ip_addr(dip)
	504
[5f96438]	505	portal, info = self.new_portal_node(st, dt, tbparams, masters,
[73e7f5c]	506	eid, myname, desthost, "control",
	507	((substrate.name,(
	508	('portal','true'),
	509	('ip4_address', "%s" % ip_addr(myip)),)),),
	510	conn_type="transit", conn_attrs=[], expid=expid)
	511
	512	return portal
	513
[5f96438]	514	def add_portals(self, top, topo, eid, masters, tbparams, ip_allocator,
[73e7f5c]	515	connInfo, expid):
	516	"""
	517	For each substrate in the main topology, find those that
	518	have nodes on more than one testbed. Insert portal nodes
	519	into the copies of those substrates on the sub topologies.
	520	"""
	521	segment_substrate = { }
	522	portals = { }
	523	for s in top.substrates:
	524	# tbs will contain an ip address on this subsrate that is in
	525	# each testbed.
	526	tbs = { }
	527	for i in s.interfaces:
	528	e = i.element
	529	tb = e.get_attribute('testbed')
[fefa026]	530	if tb and tb not in tbs:
	531	tbs[tb]= i.get_attribute('ip4_address')
[73e7f5c]	532	if len(tbs) < 2:
	533	continue
	534
[f3803ea]	535	base_tbs = set([testbed_base(t) for t in tbs])
	536
[175b444]	537	# DRAGON will not create multi-site vlans yet, so we don't do multi
	538	# connection direct transits yet.
	539	if len(tbs) == 2 :
	540	# NB: the else if on the for loop - if none of the direct
	541	# transits is applicable, use the internet.
	542	for d in self.direct_transit:
	543	if all([tbparams[x].has_key(d) for x in tbs]):
	544	self.create_direct_substrate(s, topo, tbs, tbparams,
	545	masters, eid, connInfo, expid, d)
	546	break
	547	else:
	548	self.insert_internet_portals(s, topo, tbs, tbparams,
	549	masters, eid, segment_substrate, portals,
	550	connInfo, expid)
[73e7f5c]	551	else:
[5f96438]	552	self.insert_internet_portals(s, topo, tbs, tbparams, masters,
[73e7f5c]	553	eid, segment_substrate, portals, connInfo, expid)
	554
[175b444]	555
[5f96438]	556	# Make sure that all the service importers have a control portal back
	557	# to the master for each service.
[0c4b12c]	558	for mtb in [ t for t in tbparams if t in masters ]:
[43197eb]	559	importers = set([])
	560	for m in masters[mtb]:
	561	importers \|= set(m.importers)
[0863dd1]	562	if mtb in importers:
	563	importers.discard(mtb)
[43197eb]	564	for tb in importers:
[88dd6cc]	565	if tb not in topo:
	566	self.log.error("Importer not in experiment: %s" % tb)
	567	continue
[0c4b12c]	568	if len([e for e in topo[tb].elements \
	569	if isinstance(e, topdl.Computer) and \
	570	e.get_attribute('destination_testbed') == mtb and \
	571	e.get_attribute('portal') and \
	572	e.get_attribute('portal_type') == 'both']) == 0:
	573
[175b444]	574	for tb_name in self.direct_transit:
	575
	576	if tbparams[mtb].has_key(tb_name) \
	577	and tbparams[tb].has_key(tb_name):
	578
	579	idx = len([x for x in topo.keys() \
	580	if x.startswith(tb_name)])
	581	dip, leng = ip_allocator.allocate(4)
	582	dip += 1
	583	mip = dip+1
	584	csub = topdl.Substrate(
	585	name="%s-control-%s" % (tb_name, tb),
	586	capacity=topdl.Capacity(100000.0, 'max'),
	587	attribute=[
	588	topdl.Attribute(
	589	attribute='portal',
	590	value='true'
	591	)
	592	]
	593	)
	594	seg = topdl.Segment(
	595	id= tbparams[mtb]['allocID'],
	596	type='emulab',
	597	uri = self.tbmap.get(testbed_base(mtb),
	598	None),
	599	interface=[
	600	topdl.Interface(
	601	substrate=csub.name),
	602	],
	603	attribute = [
	604	topdl.Attribute(attribute=n, value=v)
	605	for n, v in (\
	606	('domain',
	607	tbparams[mtb].get('domain',
	608	".example.com")),
	609	('experiment', "%s/%s" % \
	610	(tbparams[mtb].get(
	611	'project',
	612	'project'),
	613	eid)),)
	614	],
	615	)
	616	portal = self.new_direct_portal(tb, mtb,
	617	masters, eid, dip, mip, idx, csub,
	618	tbparams, expid, tb_name)
	619	topo[tb].substrates.append(csub)
	620	topo[tb].elements.append(portal)
	621	topo[tb].elements.append(seg)
	622
	623	mcsub = csub.clone()
	624	seg = topdl.Segment(
	625	id= tbparams[tb]['allocID'],
	626	type='emulab',
	627	uri = self.tbmap.get(testbed_base(tb),
	628	None),
	629	interface=[
	630	topdl.Interface(
	631	substrate=csub.name),
	632	],
	633	attribute = [
	634	topdl.Attribute(attribute=n, value=v)
	635	for n, v in (\
	636	('domain',
	637	tbparams[tb].get('domain',
	638	".example.com")),
	639	('experiment', "%s/%s" % \
	640	(tbparams[tb].get('project',
	641	'project'),
	642	eid)),)
	643	],
	644	)
	645	portal = self.new_direct_portal(mtb, tb, masters,
	646	eid, mip, dip, idx, mcsub, tbparams, expid,
	647	tb_name)
	648	topo[mtb].substrates.append(mcsub)
	649	topo[mtb].elements.append(portal)
	650	topo[mtb].elements.append(seg)
	651	for t in (mtb, tb):
	652	topo[t].incorporate_elements()
	653
	654	self.create_direct_substrate(csub, topo,
	655	{tb: ip_addr(mip), mtb: ip_addr(dip)},
	656	tbparams, masters, eid, connInfo,
	657	expid, tb_name)
	658	break
	659	# This matches with the for tb_name in self.direct_transit
[0c4b12c]	660	else:
	661	self.add_control_portal(mtb, tb, masters, eid, topo,
	662	tbparams, connInfo, expid)
	663	self.add_control_portal(tb, mtb, masters, eid, topo,
	664	tbparams, connInfo, expid)
[73e7f5c]	665
	666	# Connect the portal nodes into the topologies and clear out
	667	# substrates that are not in the topologies
[0c4b12c]	668	for tb in tbparams:
[73e7f5c]	669	topo[tb].incorporate_elements()
	670	topo[tb].substrates = \
	671	[s for s in topo[tb].substrates \
	672	if len(s.interfaces) >0]
	673

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