def addIntf( self, intf, port=None ):
"""Add an interface.
intf: interface name (e.g. nodeN-ethM)
port: port number (optional, typically OpenFlow port number)"""
if port is None:
port = self.newPort()
self.intfs[ port ] = intf
self.ports[ intf ] = port
#info( '\n' )
#info( 'added intf %s:%d to node %s\n' % ( intf,port, self.name ) )
if self.inNamespace:
#info( 'moving w/inNamespace set\n' )
moveIntf( intf, self )
def moveIntfFrom( self, intf, intf_node, port=None ):
"""Move an interface.
intf: interface
intf_node: original node containing interface
port: port number (optional, typically OpenFlow port number)"""
if port is None:
port = self.newPort()
self.intfs[ port ] = intf
self.ports[ intf ] = port
self.nameToIntf[ intf.name ] = intf
debug( '\nmoving intf %s:%d to node %s\n' % ( intf, port, self.name ))
debug( 'moving', intf, 'into namespace for', self.name, '\n' )
moveIntf( intf.name, self, intf_node )
def moveIntfFrom(self, intf, intf_node, port=None):
"""Move an interface.
intf: interface
intf_node: original node containing interface
port: port number (optional, typically OpenFlow port number)"""
if port is None:
port = self.newPort()
self.intfs[port] = intf
self.ports[intf] = port
self.nameToIntf[intf.name] = intf
debug('\nmoving intf %s:%d to node %s\n' % (intf, port, self.name))
debug('moving', intf, 'into namespace for', self.name, '\n')
moveIntf(intf.name, self, intf_node)
def addIntf(self, intf, port=None):
"""Add an interface.
intf: interface name (e.g. nodeN-ethM)
port: port number (optional, typically OpenFlow port number)"""
if port is None:
port = self.newPort()
self.intfs[port] = intf
self.ports[intf] = port
#info( '\n' )
#info( 'added intf %s:%d to node %s\n' % ( intf,port, self.name ) )
if self.inNamespace:
#info( 'moving w/inNamespace set\n' )
moveIntf(intf, self)
def addIntf( self, intf, port=None ):
"""Add an interface.
intf: interface
port: port number (optional, typically OpenFlow port number)"""
if port is None:
port = self.newPort()
self.intfs[ port ] = intf
self.ports[ intf ] = port
self.nameToIntf[ intf.name ] = intf
debug( '\n' )
debug( 'added intf %s:%d to node %s\n' % ( intf, port, self.name ) )
if self.inNamespace:
debug( 'moving', intf, 'into namespace for', self.name, '\n' )
moveIntf( intf.name, self )
def _makeIntfPair(intf1,
intf2,
addr1=None,
addr2=None,
node1=None,
node2=None,
deleteIntfs=True,
runCmd=None):
"""Make a veth pair connnecting new interfaces intf1 and intf2
intf1: name for interface 1
intf2: name for interface 2
addr1: MAC address for interface 1 (optional)
addr2: MAC address for interface 2 (optional)
node1: home node for interface 1 (optional)
node2: home node for interface 2 (optional)
deleteIntfs: delete intfs before creating them
runCmd: function to run shell commands (quietRun)
raises Exception on failure
Changes:
The problem here is that we can not add a link to another
netns within a Docker container since it does not know
the other process (process not found error).
So we have to do it different:
We create the veth pair inside the default netns and move them
into their netns (container) afterwards."""
if deleteIntfs:
# Delete any old interfaces with the same names
quietRun('ip link del ' + intf1, shell=True)
quietRun('ip link del ' + intf2, shell=True)
# first: create the veth pair in default namespace
if addr1 is None and addr2 is None:
cmdOutput = quietRun('ip link add name %s '
'type veth peer name %s ' % (intf1, intf2),
shell=True)
else:
cmdOutput = quietRun('ip link add name %s '
'address %s '
'type veth peer name %s '
'address %s ' % (intf1, addr1, intf2, addr2),
shell=True)
if cmdOutput:
raise Exception("Error creating interface pair (%s,%s): %s " %
(intf1, intf2, cmdOutput))
# second: move both endpoints into the corresponding namespaces
moveIntf(intf1, node1)
moveIntf(intf2, node2)
def namespaceMove( self ):
loops = 0
while not self.isConnected():
time.sleep( 0.01 )
loops += 1
if loops > 10:
warn( "Cannot move TBIntf to mininet Node namespace: "
"ns-3 has not connected yet to the TAP interface\n" )
return
moveIntf( self.name, self.node )
self.inRightNamespace = True
# IP address has been reset while moving to namespace, needs to be set again
if self.ip is not None:
self.setIP( self.ip, self.prefixLen )
# The same for 'up'
self.isUp( True )
def namespaceMove(self):
loops = 0
while not self.isConnected():
time.sleep(0.01)
loops += 1
if loops > 10:
warn("Cannot move TBIntf to mininet Node namespace: "
"ns-3 has not connected yet to the TAP interface\n")
return
time.sleep(0.01)
moveIntf(self.name, self.node)
self.inRightNamespace = True
# IP address has been reset while moving to namespace, needs to be set again
if self.ip is not None:
self.setIP(self.ip, self.prefixLen)
# The same for 'up'
self.isUp(True)
def configureLeafPacketECMP(self):
# per-packet ECMP using bond device and RR.
# Insert one bond device per leaf.
bond = "bond%d" % self.switch_id
# Move bond intf to each leaf.
moveIntf(bond, self)
# configure mac-address on bond interface
mac = LeafMAC(self.switch_id)
setMac(self, bond, mac)
# enslave all links to spines
intfs = []
for spine in xrange(self.num_spines):
intf = "%s-eth%d" % (self.name, 1+spine+self.hosts_per_leaf)
intfs.append(intf)
cmd = "ifconfig %s up; ifenslave %s %s" % (bond, bond, ' '.join(intfs))
self.log(cmd)
self.cmd(cmd)
# configure routes to spines; in this case all spines have the
# same IP address.
spine_ip = SpineIP(0)
cmd = "route add -host %s dev %s" % (spine_ip, bond)
self.cmd(cmd)
# configure routes to all other leaves
for leaf in xrange(self.num_leafs):
leaf += 1
if leaf == self.switch_id:
continue
net = LeafNet(leaf)
sip = SpineIP(0)
cmd = "ip route add %s nexthop via %s dev %s" % (net, sip, bond)
self.cmd(cmd)
# set spine mac address
sip = SpineIP(0)
mac = SpineMAC(0)
cmd = "arp -s -i %s %s %s" % (bond, sip, mac)
self.cmd(cmd)
return
def namespaceMove(self):
"""Move tap Linux interface to the right namespace."""
loops = 0
# Wait until ns-3 process connects to the tap Linux interface. ns-3 process resides in the root
# network namespace, so it must manage to connect to the interface before it is moved to the node
# namespace. After interface move ns-3 process will not see the interface.
while not self.isConnected():
time.sleep(0.01)
loops += 1
if loops > 10:
warn("Cannot move TBIntf to mininet Node namespace: "
"ns-3 has not connected yet to the TAP interface\n")
return
# Wait a little more, just for be sure ns-3 process not miss that.
time.sleep(0.01)
# Move interface to the right namespace.
moveIntf(self.name, self.node)
self.inRightNamespace = True
# IP address has been reset while moving to namespace, needs to be set again.
if self.ip is not None:
self.setIP(self.ip, self.prefixLen)
# The same for 'up'.
self.isUp(True)
def namespaceMove( self ):
"""Move tap Linux interface to the right namespace."""
loops = 0
# Wait until ns-3 process connects to the tap Linux interface. ns-3 process resides in the root
# network namespace, so it must manage to connect to the interface before it is moved to the node
# namespace. After interface move ns-3 process will not see the interface.
while not self.isConnected():
time.sleep( 0.01 )
loops += 1
if loops > 10:
warn( "Cannot move TBIntf to mininet Node namespace: "
"ns-3 has not connected yet to the TAP interface\n" )
return
# Wait a little more, just for be sure ns-3 process not miss that.
time.sleep( 0.01 )
# Move interface to the right namespace.
moveIntf( self.name, self.node )
self.inRightNamespace = True
# IP address has been reset while moving to namespace, needs to be set again.
if self.ip is not None:
self.setIP( self.ip, self.prefixLen )
# The same for 'up'.
self.isUp( True )
def _moveLink( self, node1, node2, intf1_name=None, intf2_name=None ):
"""
Move a host node to destination node in Mininet.
node1: Moving node instance.
node2: Destination node instance.
intf1_name: Moving node interface name. Default if None.
intf2_name: Destination node interface name. Default if None.
"""
if self.debug_flag1:
args = (node1, node2, intf1_name, intf2_name)
print "EXEC: moveLink(%s, %s, %s, %s):" % args
# Part 0: Main assertions.
assert isinstance(node1, Host)
assert isinstance(node2, Switch) or isinstance(node2, Dummy)
assert not intf1_name or intf1_name in node1.nameToIntf
assert not intf2_name or intf2_name not in node2.nameToIntf
# Part 1: Extracting intf1 information.
intf1 = node1.intf(intf=intf1_name) # <- Uses defaultIntf if None.
assert intf1 is not None
intf1_name = intf1_name if intf1_name else intf1.name
assert intf1.link != None
assert intf1.link.intf1 == intf1 or intf1.link.intf2 == intf1
assert intf1.node == node1
intf1_other = None
if intf1.link.intf1 == intf1:
intf1_other = intf1.link.intf2
elif intf1.link.intf2 == intf1:
intf1_other = intf1.link.intf1
node1_other = intf1_other.node
intf1_name_other = intf1_other.name
intf1_port_other = node1_other.ports[intf1_other]
# Special case: Node already connected to other node.
if node1_other == node2:
if not intf2_name or intf2_name == intf1_name_other:
warn('connection already established\n')
return
# Part 1.5: Call detach() on switch.
if hasattr(node1_other, 'detach'):
if self.debug_flag1:
print "Detach %s from %s" % (intf1_other, node1_other)
node1_other.detach(intf1_other)
# Part 2: Exchange information between node1_other and node2.
del node1_other.intfs[ intf1_port_other ]
del node1_other.ports[ intf1_other ]
del node1_other.nameToIntf[ intf1_name_other ]
intf2_port = node2.newPort() # For now, just assign new port.
intf2 = intf1_other
if not intf2_name:
intf2_name = "%s-eth%d" % (node2.name, intf2_port)
intf2.rename(intf2_name)
intf2.node = node2
node2.intfs[ intf2_port ] = intf2
node2.ports[ intf2 ] = intf2_port
node2.nameToIntf[ intf2_name ] = intf2
# Part 3: Moving intf1_other to intf2 by namespace.
debug( '\nmoving', intf2, 'into namespace for', node2, '\n' )
moveIntf( intf2_name, node2, srcNode=node1_other )
# Part 3.5: Call detach() on switch.
if hasattr(node2, 'attach'):
if self.debug_flag1:
print "Attach %s to %s" % (intf2, node2)
node2.attach(intf2)
def moveLink( self, node1, node2, intf1_name, intf2_name ):
if self.debug_flag1:
args = (node1, node2, intf1_name, intf2_name)
print "EXEC: moveLink(%s, %s, %s, %s):" % args
assert isinstance(node1, Host) #Node)
assert isinstance(node2, Switch) or isinstance(node2, Dummy) #Node)
assert intf1_name in node1.nameToIntf
assert intf2_name in node2.nameToUnusedPorts
if self.debug_flag2: #Make debug_flag false when not testing.
intf1 = node1.nameToIntf[intf1_name]
if intf1.link.intf1 == intf1:
intf1_other = intf1.link.intf2
elif intf1.link.intf2 == intf2:
intf1_other = intf1.link.intf1
node1_other = intf1_other.node
intf1_name_other = intf1_other.name
node1_other.nameToUnusedPorts[intf1_name_other] = None
del node2.nameToUnusedPorts[intf2_name]
return
# TODO: Fix below~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~``
# CODE HERE!
if self.debug_flag3:
node1_intf = node1.nameToIntf[intf1_name]
if node1_intf.link.intf1==node1_intf:
predest_intf=node1_intf.link.intf2
else:
predest_intf=node1_intf.link.intf1
#TODO:Figure out the present switch-intf name and the port,move them to nameToUnunsedport
# And move the intf object to node2
for name in predest_intf.node.nameToIntf:
if predest_intf == predest_intf.node.nameToIntf[name]:
predest_intf_name=name
break
predest_intf.node.nameToUnusedPorts[predest_intf_name]=predest_intf.node.ports[predest_intf]
from mininet.util import moveIntf
moveIntf(predest_intf, node2)
#TODO:Put the intf previously moved to node2 in the dicts, that is, replace the dummy_intf
node2.nameToIntf[intf2_name] = predest_intf
return
print "FFFFFFFFFFFFFFFFFFFF"
intf1 = node1.nameToIntf[intf1_name]
intf1_other = None
assert intf1.link != None
assert intf1.link.intf1 == intf1 or intf1.link.intf2 == intf1
assert intf1.node == node1
if intf1.link.intf1 == intf1:
intf1_other = intf1.link.intf2
elif intf1.link.intf2 == intf1:
intf1_other = intf1.link.intf1
node1_other = intf1_other.node
intf1_name_other = intf1_other.name # These three must be saved.
intf1_port_other = node1_other.ports[intf1_other]
# Special case: Node already connected to other node.
if node1_other == node2 and intf1_name_other == intf2_name:
warn('connection already established\n')
return
del node1_other.intfs[ intf1_port_other ]
del node1_other.ports[ intf1_other ]
del node1_other.nameToIntf[ intf1_name_other ]
node1_other.nameToUnusedPorts[ intf1_name_other ] = intf1_port_other
intf2_port = node2.nameToUnusedPorts[ intf2_name ]
intf2 = intf1_other
intf2.rename(intf2_name)
#intf2.node = node2
node2.moveIntfFrom(intf2, node1_other, intf2_port)
intf2.node = node2
del node2.nameToUnusedPorts[ intf2_name ]
