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gerrit.onosproject.org / OnosSystemTest / 3d43afaff937d0265eee919626675be644d0f788 / . / TestON / drivers / common / cli / emulator / mininetclidriver.py
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#!/usr/bin/env python
"""
Created on 26-Oct-2012
Copyright 2012 Open Networking Foundation (ONF)
Please refer questions to either the onos test mailing list at <onos-test@onosproject.org>,
the System Testing Plans and Results wiki page at <https://wiki.onosproject.org/x/voMg>,
or the System Testing Guide page at <https://wiki.onosproject.org/x/WYQg>
TestON is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
( at your option ) any later version.
TestON is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with TestON. If not, see <http://www.gnu.org/licenses/>.
MininetCliDriver is the basic driver which will handle the Mininet functions
Some functions rely on a modified version of Mininet. These functions
should all be noted in the comments. To get this MN version run these commands
from within your Mininet folder:
git remote add jhall11 https://github.com/jhall11/mininet.git
git fetch jhall11
git checkout -b dynamic_topo remotes/jhall11/dynamic_topo
git pull
Note that you may need to run 'sudo make develop' if your mnexec.c file
changed when switching branches."""
import pexpect
import re
import sys
import types
import os
import time
from math import pow
from drivers.common.cli.emulatordriver import Emulator
from core.graph import Graph
class MininetCliDriver( Emulator ):
"""
MininetCliDriver is the basic driver which will handle
the Mininet functions"""
def __init__( self ):
super( MininetCliDriver, self ).__init__()
self.handle = self
self.name = None
self.home = None
self.wrapped = sys.modules[ __name__ ]
self.flag = 0
# TODO: Refactor driver to use these everywhere
self.mnPrompt = "mininet>"
self.hostPrompt = "~#"
self.bashPrompt = "\$"
self.scapyPrompt = ">>>"
self.graph = Graph()
def connect( self, **connectargs ):
"""
Here the main is the TestON instance after creating
all the log handles."""
try:
for key in connectargs:
vars( self )[ key ] = connectargs[ key ]
self.home = "~/mininet"
self.name = self.options[ 'name' ]
for key in self.options:
if key == "home":
self.home = self.options[ 'home' ]
break
if self.home is None or self.home == "":
self.home = "~/mininet"
try:
if os.getenv( str( self.ip_address ) ) is not None:
self.ip_address = os.getenv( str( self.ip_address ) )
else:
main.log.info( self.name +
": Trying to connect to " +
self.ip_address )
except KeyError:
main.log.info( "Invalid host name," +
" connecting to local host instead" )
self.ip_address = 'localhost'
except Exception as inst:
main.log.error( "Uncaught exception: " + str( inst ) )
self.handle = super(
MininetCliDriver,
self ).connect(
user_name=self.user_name,
ip_address=self.ip_address,
port=None,
pwd=self.pwd )
if self.handle:
main.log.info( "Connection successful to the host " +
self.user_name +
"@" +
self.ip_address )
return main.TRUE
else:
main.log.error( "Connection failed to the host " +
self.user_name +
"@" +
self.ip_address )
main.log.error( "Failed to connect to the Mininet CLI" )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def startNet( self, topoFile='', args='', mnCmd='', timeout=120 ):
"""
Description:
Starts Mininet accepts a topology(.py) file and/or an optional
argument, to start the mininet, as a parameter.
Can also send regular mininet command to load up desired topology.
Eg. Pass in a string 'mn --topo=tree,3,3' to mnCmd
Options:
topoFile = file path for topology file (.py)
args = extra option added when starting the topology from the file
mnCmd = Mininet command use to start topology
Returns:
main.TRUE if the mininet starts successfully, main.FALSE
otherwise
"""
try:
if self.handle:
# make sure old networks are cleaned up
main.log.info( self.name +
": Clearing any residual state or processes" )
self.handle.sendline( "sudo mn -c" )
i = self.handle.expect( [ 'password\sfor\s',
'Cleanup\scomplete',
pexpect.EOF,
pexpect.TIMEOUT ],
timeout )
if i == 0:
# Sudo asking for password
main.log.info( self.name + ": Sending sudo password" )
self.handle.sendline( self.pwd )
i = self.handle.expect( [ '%s:' % self.user_name,
self.prompt,
pexpect.EOF,
pexpect.TIMEOUT ],
timeout )
if i == 1:
main.log.info( self.name + ": Clean" )
elif i == 2:
main.log.error( self.name + ": Connection terminated" )
elif i == 3: # timeout
main.log.error( self.name + ": Something while cleaning " +
"Mininet took too long... " )
# Craft the string to start mininet
cmdString = "sudo "
if not mnCmd:
if topoFile is None or topoFile == '': # If no file is given
main.log.info( self.name + ": building fresh Mininet" )
cmdString += "mn "
if args is None or args == '':
# If no args given, use args from .topo file
args = self.options[ 'arg1' ] +\
" " + self.options[ 'arg2' ] +\
" --mac --controller " +\
self.options[ 'controller' ] + " " +\
self.options[ 'arg3' ]
else: # else only use given args
pass
# TODO: allow use of topo args and method args?
else: # Use given topology file
main.log.info(
"Starting Mininet from topo file " +
topoFile )
cmdString += "-E python " + topoFile + " "
if args is None:
args = ''
# TODO: allow use of args from .topo file?
cmdString += args
else:
main.log.info( "Starting Mininet topology using '" + mnCmd +
"' command" )
cmdString += mnCmd
# Send the command and check if network started
self.handle.sendline( "" )
self.handle.expect( self.prompt )
main.log.info( "Sending '" + cmdString + "' to " + self.name )
self.handle.sendline( cmdString )
startTime = time.time()
while True:
i = self.handle.expect( [ 'mininet>',
'Exception|Error',
'\*\*\*',
pexpect.EOF,
pexpect.TIMEOUT,
"No such file or directory"],
timeout )
if i == 0:
main.log.info( self.name + ": Mininet built\nTime Took : " + str( time.time() - startTime ) )
return main.TRUE
elif i == 1:
response = str( self.handle.before +
self.handle.after )
self.handle.expect( self.prompt )
response += str( self.handle.before +
self.handle.after )
main.log.error(
self.name +
": Launching Mininet failed: " + response )
return main.FALSE
elif i == 2:
self.handle.expect( [ "\n",
pexpect.EOF,
pexpect.TIMEOUT ],
timeout )
main.log.info( self.handle.before )
elif i == 3:
main.log.error( self.name + ": Connection timeout" )
return main.FALSE
elif i == 4: # timeout
main.log.error(
self.name +
": Something took too long... " )
main.log.debug( self.handle.before + self.handle.after )
return main.FALSE
elif i == 5:
main.log.error( self.name + ": " + self.handle.before + self.handle.after )
return main.FALSE
# Why did we hit this part?
main.log.error( "startNet did not return correctly" )
return main.FASLE
else: # if no handle
main.log.error( self.name + ": Connection failed to the host " +
self.user_name + "@" + self.ip_address )
main.log.error( self.name + ": Failed to connect to the Mininet" )
return main.FALSE
except pexpect.TIMEOUT:
main.log.exception( self.name + ": TIMEOUT exception found while starting Mininet" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def numSwitchesNlinks( self, topoType, depth, fanout ):
try:
if topoType == 'tree':
# In tree topology, if fanout arg is not given, by default it is 2
if fanout is None:
fanout = 2
k = 0
count = 0
while( k <= depth - 1 ):
count = count + pow( fanout, k )
k = k + 1
numSwitches = count
while( k <= depth - 2 ):
# depth-2 gives you only core links and not considering
# edge links as seen by ONOS. If all the links including
# edge links are required, do depth-1
count = count + pow( fanout, k )
k = k + 1
numLinks = count * fanout
# print "num_switches for %s(%d,%d) = %d and links=%d" %(
# topoType,depth,fanout,numSwitches,numLinks )
elif topoType == 'linear':
# In linear topology, if fanout or numHostsPerSw is not given,
# by default it is 1
if fanout is None:
fanout = 1
numSwitches = depth
numHostsPerSw = fanout
totalNumHosts = numSwitches * numHostsPerSw
numLinks = totalNumHosts + ( numSwitches - 1 )
main.log.debug( "num_switches for %s(%d,%d) = %d and links=%d" %
( topoType, depth, fanout, numSwitches, numLinks ) )
topoDict = { "num_switches": int( numSwitches ),
"num_corelinks": int( numLinks ) }
return topoDict
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def calculateSwAndLinks( self ):
"""
Calculate the number of switches and links in a topo."""
# TODO: combine this function and numSwitchesNlinks
try:
argList = self.options[ 'arg1' ].split( "," )
topoArgList = argList[ 0 ].split( " " )
argList = map( int, argList[ 1: ] )
topoArgList = topoArgList[ 1: ] + argList
topoDict = self.numSwitchesNlinks( *topoArgList )
return topoDict
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def pingall( self, protocol="IPv4", timeout=300, shortCircuit=False, acceptableFailed=0 ):
"""
Verifies the reachability of the hosts using pingall command.
Optional parameter timeout allows you to specify how long to
wait for pingall to complete
Optional:
timeout( seconds ) - How long to wait before breaking the pingall
shortCircuit - Break the pingall based on the number of failed hosts
ping
acceptableFailed - Set the number of acceptable failed pings for the
function to still return main.TRUE
Returns:
main.TRUE if pingall completes with no pings dropped
otherwise main.FALSE
"""
import time
try:
timeout = int( timeout )
if self.handle:
main.log.info(
self.name +
": Checking reachabilty to the hosts using pingall" )
response = ""
failedPings = 0
returnValue = main.TRUE
cmd = "pingall"
if protocol == "IPv6":
cmd = "py net.pingAll6()"
self.handle.sendline( cmd )
startTime = time.time()
while True:
i = self.handle.expect( [ "mininet>", "X",
pexpect.EOF,
pexpect.TIMEOUT ],
timeout )
if i == 0:
main.log.info( self.name + ": pingall finished" )
response += self.handle.before
break
elif i == 1:
response += self.handle.before + self.handle.after
failedPings = failedPings + 1
if failedPings > acceptableFailed:
returnValue = main.FALSE
if shortCircuit:
main.log.error( self.name +
": Aborting pingall - "
+ str( failedPings ) +
" pings failed" )
break
if ( time.time() - startTime ) > timeout:
returnValue = main.FALSE
main.log.error( self.name +
": Aborting pingall - " +
"Function took too long " )
break
elif i == 2:
main.log.error( self.name +
": EOF exception found" )
main.log.error( self.name + ": " +
self.handle.before )
main.cleanAndExit()
elif i == 3:
response += self.handle.before
main.log.error( self.name +
": TIMEOUT exception found" )
main.log.error( self.name +
": " +
str( response ) )
# NOTE: Send ctrl-c to make sure pingall is done
self.handle.send( "\x03" )
self.handle.expect( "Interrupt" )
self.handle.expect( "mininet>" )
break
pattern = "Results\:"
main.log.info( "Pingall output: " + str( response ) )
if re.search( pattern, response ):
main.log.info( self.name + ": Pingall finished with "
+ str( failedPings ) + " failed pings" )
return returnValue
else:
# NOTE: Send ctrl-c to make sure pingall is done
self.handle.send( "\x03" )
self.handle.expect( "Interrupt" )
self.handle.expect( "mininet>" )
return main.FALSE
else:
main.log.error( self.name + ": Connection failed to the host" )
main.cleanAndExit()
except pexpect.TIMEOUT:
if response:
main.log.info( "Pingall output: " + str( response ) )
main.log.error( self.name + ": pexpect.TIMEOUT found" )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
def fpingHost( self, **pingParams ):
"""
Uses the fping package for faster pinging...
*requires fping to be installed on machine running mininet"""
try:
args = utilities.parse_args( [ "SRC", "TARGET" ], **pingParams )
command = args[ "SRC" ] + \
" fping -i 100 -t 20 -C 1 -q " + args[ "TARGET" ]
self.handle.sendline( command )
self.handle.expect(
[ args[ "TARGET" ], pexpect.EOF, pexpect.TIMEOUT ] )
self.handle.expect( [ "mininet", pexpect.EOF, pexpect.TIMEOUT ] )
response = self.handle.before
if re.search( ":\s-", response ):
main.log.info( self.name + ": Ping fail" )
return main.FALSE
elif re.search( ":\s\d{1,2}\.\d\d", response ):
main.log.info( self.name + ": Ping good!" )
return main.TRUE
main.log.info( self.name + ": Install fping on mininet machine... " )
main.log.info( self.name + ": \n---\n" + response )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def pingallHosts( self, hostList, wait=1 ):
"""
Ping all specified IPv4 hosts
Acceptable hostList:
- [ 'h1','h2','h3','h4' ]
Returns main.TRUE if all hosts specified can reach
each other
Returns main.FALSE if one or more of hosts specified
cannot reach each other"""
wait = int( wait )
cmd = " ping -c 1 -i 1 -W " + str( wait ) + " "
try:
main.log.info( "Testing reachability between specified hosts" )
isReachable = main.TRUE
pingResponse = "IPv4 ping across specified hosts\n"
failedPings = 0
for host in hostList:
listIndex = hostList.index( host )
# List of hosts to ping other than itself
pingList = hostList[ :listIndex ] + \
hostList[ ( listIndex + 1 ): ]
pingResponse += str( str( host ) + " -> " )
for temp in pingList:
# Current host pings all other hosts specified
pingCmd = str( host ) + cmd + str( temp )
self.handle.sendline( pingCmd )
self.handle.expect( "mininet>", timeout=wait + 5 )
response = self.handle.before
if re.search( ',\s0\%\spacket\sloss', response ):
pingResponse += str( " h" + str( temp[ 1: ] ) )
else:
pingResponse += " X"
# One of the host to host pair is unreachable
isReachable = main.FALSE
failedPings += 1
main.log.warn( "Cannot ping between {} and {}".format( host, temp ) )
pingResponse += "\n"
main.log.info( pingResponse + "Failed pings: " + str( failedPings ) )
return isReachable
except pexpect.TIMEOUT:
main.log.exception( self.name + ": TIMEOUT exception" )
response = self.handle.before
# NOTE: Send ctrl-c to make sure command is stopped
self.handle.send( "\x03" )
self.handle.expect( "Interrupt" )
response += self.handle.before + self.handle.after
self.handle.expect( "mininet>" )
response += self.handle.before + self.handle.after
main.log.debug( response )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def pingIpv6Hosts( self, hostList, wait=1, acceptableFailed=0 ):
"""
IPv6 ping all hosts in hostList.
acceptableFailed: max number of acceptable failed pings
Returns main.TRUE if all hosts specified can reach each other
Returns main.FALSE if one or more of hosts specified cannot reach each other
"""
try:
main.log.info( "Testing reachability between specified IPv6 hosts" )
isReachable = main.TRUE
wait = int( wait )
cmd = " ping6 -c 1 -i 1 -W " + str( wait ) + " "
pingResponse = "IPv6 Pingall output:\n"
failedPingsTotal = 0
for host in hostList:
listIndex = hostList.index( host )
# List of hosts to ping other than itself
pingList = hostList[ :listIndex ] + \
hostList[ ( listIndex + 1 ): ]
pingResponse += str( str( host ) + " -> " )
for temp in pingList:
# Current host pings all other hosts specified
failedPings = 0
pingCmd = str( host ) + cmd + str( self.getIPAddress( temp, proto='IPv6' ) )
while failedPings <= acceptableFailed:
main.log.debug( "Pinging from " + str( host ) + " to " + str( temp ) )
self.handle.sendline( pingCmd )
self.handle.expect( "mininet>", timeout=wait + 5 )
response = self.handle.before
if re.search( ',\s0\%\spacket\sloss', response ):
pingResponse += " " + str( temp )
break
else:
failedPings += 1
time.sleep(1)
if failedPings > acceptableFailed:
# One of the host to host pair is unreachable
pingResponse += " X"
isReachable = main.FALSE
failedPingsTotal += 1
main.log.warn( "Cannot ping between {} and {}".format( host, temp ) )
pingResponse += "\n"
main.log.info( pingResponse + "Failed pings: " + str( failedPingsTotal ) )
return isReachable
except pexpect.TIMEOUT:
main.log.exception( self.name + ": TIMEOUT exception" )
response = self.handle.before
# NOTE: Send ctrl-c to make sure command is stopped
self.handle.send( "\x03" )
self.handle.expect( "Interrupt" )
response += self.handle.before + self.handle.after
self.handle.expect( "mininet>" )
response += self.handle.before + self.handle.after
main.log.debug( response )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def discoverHosts( self, hostList=[], wait=1, dstIp="6.6.6.6", dstIp6="1020::3fe" ):
'''
Hosts in hostList will do a single ping to a non-existent address for ONOS to
discover them. A host will use ping/ping6 to send echo requests depending on if
it has IPv4/IPv6 addresses configured.
Optional:
hostList: a list of names of the hosts that need to be discovered. If not
specified mininet will send ping from all the hosts
wait: timeout for IPv4/IPv6 echo requests
dstIp: destination address used by IPv4 hosts
dstIp6: destination address used by IPv6 hosts
Returns:
main.TRUE if all ping packets were successfully sent. Otherwise main.FALSE
'''
try:
if not hostList:
hosts = self.getHosts( getInterfaces=False )
hostList = hosts.keys()
discoveryResult = main.TRUE
for host in hostList:
cmd = ""
if self.getIPAddress( host ):
cmd = "{} ping -c 1 -i 1 -W {} {}".format( host, wait, dstIp )
main.log.debug( "Sending IPv4 probe ping from host {}".format( host ) )
elif self.getIPAddress( host, proto='IPV6' ):
cmd = "{} ping6 -c 1 -i 1 -W {} {}".format( host, wait, dstIp6 )
main.log.debug( "Sending IPv6 probe ping from host {}".format( host ) )
else:
main.log.warn( "No IP addresses configured on host {}, skipping discovery".format( host ) )
discoveryResult = main.FALSE
if cmd:
self.handle.sendline( "{} ip neigh flush all".format( host ) )
self.handle.expect( "mininet>" )
self.handle.sendline( cmd )
self.handle.expect( "mininet>", timeout=wait + 5 )
return discoveryResult
except pexpect.TIMEOUT:
main.log.exception( self.name + ": TIMEOUT exception" )
response = self.handle.before
# NOTE: Send ctrl-c to make sure command is stopped
self.handle.send( "\x03" )
self.handle.expect( "Interrupt" )
response += self.handle.before + self.handle.after
self.handle.expect( "mininet>" )
response += self.handle.before + self.handle.after
main.log.debug( response )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def pingallHostsUnidirectional( self, srcList, dstList, ipv6=False, wait=1, acceptableFailed=0 ):
"""
Verify ping from each host in srcList to each host in dstList
acceptableFailed: max number of acceptable failed pings
Returns main.TRUE if all src hosts can reach all dst hosts
Returns main.FALSE if one or more of src hosts cannot reach one or more of dst hosts
"""
try:
main.log.info( "Verifying ping from each src host to each dst host" )
isReachable = main.TRUE
wait = int( wait )
cmd = " ping" + ("6" if ipv6 else "") + " -c 1 -i 1 -W " + str( wait ) + " "
pingResponse = "Ping output:\n"
failedPingsTotal = 0
for host in srcList:
pingResponse += str( str( host ) + " -> " )
for temp in dstList:
failedPings = 0
dstIP = self.getIPAddress( temp, proto='IPV6' if ipv6 else 'IPV4' )
assert dstIP, "Not able to get IP address of host {}".format( temp )
pingCmd = str( host ) + cmd + str( dstIP )
while failedPings <= acceptableFailed:
main.log.debug( "Pinging from " + str( host ) + " to " + str( temp ) )
self.handle.sendline( pingCmd )
self.handle.expect( "mininet>", timeout=wait + 5 )
response = self.handle.before
if re.search( ',\s0\%\spacket\sloss', response ):
pingResponse += " " + str( temp )
break
else:
failedPings += 1
time.sleep(1)
if failedPings > acceptableFailed:
# One of the host to host pair is unreachable
pingResponse += " X"
isReachable = main.FALSE
failedPingsTotal += 1
pingResponse += "\n"
main.log.info( pingResponse + "Failed pings: " + str( failedPingsTotal ) )
return isReachable
except AssertionError:
main.log.exception( "" )
return main.FALSE
except pexpect.TIMEOUT:
main.log.exception( self.name + ": TIMEOUT exception" )
response = self.handle.before
# NOTE: Send ctrl-c to make sure command is stopped
self.handle.send( "\x03" )
self.handle.expect( "Interrupt" )
response += self.handle.before + self.handle.after
self.handle.expect( "mininet>" )
response += self.handle.before + self.handle.after
main.log.debug( response )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def pingHost( self, **pingParams ):
"""
Ping from one mininet host to another
Currently the only supported Params: SRC, TARGET, and WAIT
"""
args = utilities.parse_args( [ "SRC", "TARGET", 'WAIT' ], **pingParams )
wait = args[ 'WAIT' ]
wait = int( wait if wait else 1 )
command = args[ "SRC" ] + " ping " + \
args[ "TARGET" ] + " -c 1 -i 1 -W " + str( wait ) + " "
try:
main.log.info( "Sending: " + command )
self.handle.sendline( command )
i = self.handle.expect( [ command, pexpect.TIMEOUT ],
timeout=wait + 5 )
if i == 1:
main.log.error(
self.name +
": timeout when waiting for response from mininet" )
main.log.error( "response: " + str( self.handle.before ) )
i = self.handle.expect( [ "mininet>", pexpect.TIMEOUT ] )
if i == 1:
main.log.error(
self.name +
": timeout when waiting for response from mininet" )
main.log.error( "response: " + str( self.handle.before ) )
response = self.handle.before
if re.search( ',\s0\%\spacket\sloss', response ):
main.log.info( self.name + ": no packets lost, host is reachable" )
return main.TRUE
else:
main.log.warn(
self.name +
": PACKET LOST, HOST IS NOT REACHABLE" )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def ping6pair( self, **pingParams ):
"""
IPv6 Ping between a pair of mininet hosts
Currently the only supported Params are: SRC, TARGET, and WAIT
FLOWLABEL and -I (src interface) will be added later after running some tests.
Example: main.Mininet1.ping6pair( src="h1", target="1000::2" )
"""
args = utilities.parse_args( [ "SRC", "TARGET", 'WAIT' ], **pingParams )
wait = args[ 'WAIT' ]
wait = int( wait if wait else 1 )
command = args[ "SRC" ] + " ping6 " + \
args[ "TARGET" ] + " -c 1 -i 1 -W " + str( wait ) + " "
try:
main.log.info( "Sending: " + command )
self.handle.sendline( command )
i = self.handle.expect( [ command, pexpect.TIMEOUT ],
timeout=wait + 5 )
if i == 1:
main.log.error(
self.name +
": timeout when waiting for response from mininet" )
main.log.error( "response: " + str( self.handle.before ) )
i = self.handle.expect( [ "mininet>", pexpect.TIMEOUT ] )
if i == 1:
main.log.error(
self.name +
": timeout when waiting for response from mininet" )
main.log.error( "response: " + str( self.handle.before ) )
response = self.handle.before
main.log.info( self.name + ": Ping Response: " + response )
if re.search( ',\s0\%\spacket\sloss', response ):
main.log.info( self.name + ": no packets lost, host is reachable" )
return main.TRUE
else:
main.log.info(
self.name +
": PACKET LOST, HOST IS NOT REACHABLE" )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def pingHostSetAlternative( self, dstIPList, wait=1, IPv6=False ):
"""
Description:
Ping a set of destination host from host CLI.
Logging into a Mininet host CLI is required before calling this funtion.
Params:
dstIPList is a list of destination ip addresses
Returns:
main.TRUE if the destination host is reachable
main.FALSE otherwise
"""
isReachable = main.TRUE
wait = int( wait )
cmd = "ping"
if IPv6:
cmd = cmd + "6"
cmd = cmd + " -c 1 -i 1 -W " + str( wait )
try:
for dstIP in dstIPList:
pingCmd = cmd + " " + dstIP
self.handle.sendline( pingCmd )
i = self.handle.expect( [ self.hostPrompt,
'\*\*\* Unknown command: ' + pingCmd,
pexpect.TIMEOUT ],
timeout=wait + 5 )
# For some reason we need to send something
# Otherwise ping results won't be read by handle
self.handle.sendline( "" )
self.handle.expect( self.hostPrompt )
if i == 0:
response = self.handle.before
if not re.search( ',\s0\%\spacket\sloss', response ):
main.log.debug( "Ping failed between %s and %s" % ( self.name, dstIP ) )
isReachable = main.FALSE
elif i == 1:
main.log.error( self.name + ": function should be called from host CLI instead of Mininet CLI" )
main.cleanAndExit()
elif i == 2:
main.log.error( self.name + ": timeout when waiting for response" )
isReachable = main.FALSE
else:
main.log.error( self.name + ": unknown response: " + self.handle.before )
isReachable = main.FALSE
except pexpect.TIMEOUT:
main.log.exception( self.name + ": TIMEOUT exception" )
response = self.handle.before
# NOTE: Send ctrl-c to make sure command is stopped
self.handle.send( "\x03" )
self.handle.expect( "Interrupt" )
response += self.handle.before + self.handle.after
self.handle.expect( "mininet>" )
response += self.handle.before + self.handle.after
main.log.debug( response )
isReachable = main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
return isReachable
def checkIP( self, host ):
"""
Verifies the host's ip configured or not."""
try:
if self.handle:
try:
response = self.execute(
cmd=host +
" ifconfig",
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
pattern = "inet\s(addr|Mask):([0-1]{1}[0-9]{1,2}|" +\
"2[0-4][0-9]|25[0-5]|[0-9]{1,2}).([0-1]{1}" +\
"[0-9]{1,2}|2[0-4][0-9]|25[0-5]|[0-9]{1,2})." +\
"([0-1]{1}[0-9]{1,2}|2[0-4][0-9]|25[0-5]|" +\
"[0-9]{1,2}).([0-1]{1}[0-9]{1,2}|2[0-4]" +\
"[0-9]|25[0-5]|[0-9]{1,2})"
# pattern = "inet addr:10.0.0.6"
if re.search( pattern, response ):
main.log.info( self.name + ": Host Ip configured properly" )
return main.TRUE
else:
main.log.error( self.name + ": Host IP not found" )
return main.FALSE
else:
main.log.error( self.name + ": Connection failed to the host" )
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def verifySSH( self, **connectargs ):
# FIXME: Who uses this and what is the purpose? seems very specific
try:
response = self.execute(
cmd="h1 /usr/sbin/sshd -D&",
prompt="mininet>",
timeout=10 )
response = self.execute(
cmd="h4 /usr/sbin/sshd -D&",
prompt="mininet>",
timeout=10 )
for key in connectargs:
vars( self )[ key ] = connectargs[ key ]
response = self.execute(
cmd="xterm h1 h4 ",
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
import time
time.sleep( 20 )
if self.flag == 0:
self.flag = 1
return main.FALSE
else:
return main.TRUE
def moveHost( self, host, oldSw, newSw, macAddr=None, prefixLen=None ):
"""
Moves a host from one switch to another on the fly
If macAddr is specified, change MAC address of the host interface
to specified MAC address.
Note: The intf between host and oldSw when detached
using detach(), will still show up in the 'net'
cmd, because switch.detach() doesn't affect switch.intfs[]
( which is correct behavior since the interfaces
haven't moved ).
"""
if self.handle:
try:
# Bring link between oldSw-host down
cmd = "py net.configLinkStatus('" + oldSw + "'," + "'" + host +\
"'," + "'down')"
print "cmd1= ", cmd
response = self.execute( cmd=cmd,
prompt="mininet>",
timeout=10 )
# Determine hostintf and Oldswitchintf
cmd = "px hintf,sintf = " + host + ".connectionsTo(" + oldSw +\
")[0]"
print "cmd2= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Determine ip and mac address of the host-oldSw interface
cmd = "px ipaddr = hintf.IP()"
print "cmd3= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
if macAddr is None:
cmd = "px macaddr = hintf.MAC()"
else:
cmd = 'px macaddr = "%s"' % macAddr
print "cmd3= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Detach interface between oldSw-host
cmd = "px " + oldSw + ".detach( sintf )"
print "cmd4= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Add link between host-newSw
cmd = "py net.addLink(" + host + "," + newSw + ")"
print "cmd5= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Determine hostintf and Newswitchintf
cmd = "px hintf,sintf = " + host + ".connectionsTo(" + newSw +\
")[-1]"
print "cmd6= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Attach interface between newSw-host
cmd = "px " + newSw + ".attach( sintf )"
print "cmd3= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Set ipaddress of the host-newSw interface
cmd = "px " + host + ".setIP( ip = ipaddr, intf = hintf, " \
"prefixLen = %s )" % str( prefixLen )
print "cmd7 = ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Set macaddress of the host-newSw interface
cmd = "px " + host + ".setMAC( mac = macaddr, intf = hintf)"
print "cmd8 = ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
cmd = "net"
print "cmd9 = ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
print "output = ", self.handle.before
# Determine ipaddress of the host-newSw interface
cmd = host + " ifconfig"
print "cmd10= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
print "ifconfig o/p = ", self.handle.before
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
return main.FALSE
def moveHostv6( self, host, oldSw, newSw, macAddr=None ):
"""
Moves a host from one switch to another on the fly
If macAddr is specified, change MAC address of the host interface
to specified MAC address.
Note: The intf between host and oldSw when detached
using detach(), will still show up in the 'net'
cmd, because switch.detach() doesn't affect switch.intfs[]
( which is correct behavior since the interfaces
haven't moved ).
"""
if self.handle:
try:
IP = str( self.getIPAddress( host, proto='IPV6' ) ) + "/64"
# Bring link between oldSw-host down
cmd = "py net.configLinkStatus('" + oldSw + "'," + "'" + host +\
"'," + "'down')"
print "cmd1= ", cmd
response = self.execute( cmd=cmd,
prompt="mininet>",
timeout=10 )
# Determine hostintf and Oldswitchintf
cmd = "px hintf,sintf = " + host + ".connectionsTo(" + oldSw +\
")[0]"
print "cmd2= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Determine ip and mac address of the host-oldSw interface
cmd = "px ipaddr = " + str( IP )
print "cmd3= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
if macAddr is None:
cmd = "px macaddr = hintf.MAC()"
else:
cmd = 'px macaddr = "%s"' % macAddr
print "cmd3= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Detach interface between oldSw-host
cmd = "px " + oldSw + ".detach(sintf)"
print "cmd4= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Add link between host-newSw
cmd = "py net.addLink(" + host + "," + newSw + ")"
print "cmd5= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Determine hostintf and Newswitchintf
cmd = "px hintf,sintf = " + host + ".connectionsTo(" + newSw +\
")[-1]"
print "cmd6= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Attach interface between newSw-host
cmd = "px " + newSw + ".attach(sintf)"
print "cmd6= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Set macaddress of the host-newSw interface
cmd = "px " + host + ".setMAC(mac = macaddr, intf = hintf)"
print "cmd7 = ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
# Set ipaddress of the host-newSw interface
cmd = "px " + host + ".setIP(ip = ipaddr, intf = hintf)"
print "cmd8 = ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
cmd = host + " ifconfig"
print "cmd9 =", cmd
response = self.execute( cmd = cmd, prompt="mininet>", timeout=10 )
print response
pattern = "h\d-eth([\w])"
ipAddressSearch = re.search( pattern, response )
print ipAddressSearch.group( 1 )
intf = host + "-eth" + str( ipAddressSearch.group( 1 ) )
cmd = host + " ip -6 addr add %s dev %s" % ( IP, intf )
print "cmd10 = ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
cmd = "net"
print "cmd11 = ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
print "output = ", self.handle.before
# Determine ipaddress of the host-newSw interface
cmd = host + " ifconfig"
print "cmd12= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
print "ifconfig o/p = ", self.handle.before
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
return main.FALSE
def changeIP( self, host, intf, newIP, newNetmask ):
"""
Changes the ip address of a host on the fly
Ex: h2 ifconfig h2-eth0 10.0.1.2 netmask 255.255.255.0"""
if self.handle:
try:
cmd = host + " ifconfig " + intf + " " + \
newIP + " " + 'netmask' + " " + newNetmask
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "response = " + response )
main.log.info(
"Ip of host " +
host +
" changed to new IP " +
newIP )
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def changeDefaultGateway( self, host, newGW ):
"""
Changes the default gateway of a host
Ex: h1 route add default gw 10.0.1.2"""
if self.handle:
try:
cmd = host + " route add default gw " + newGW
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "response = " + response )
main.log.info(
"Default gateway of host " +
host +
" changed to " +
newGW )
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def addRoute( self, host, dstIP, interface, ipv6=False ):
"""
Add a route to host
Ex: h1 route add -host 224.2.0.1 h1-eth0
"""
if self.handle:
try:
cmd = str( host )
if ipv6:
cmd += " route -A inet6 add "
else:
cmd += " route add -host "
cmd += str( dstIP ) + " " + str( interface )
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.debug( "response = " + response )
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def addStaticMACAddress( self, host, GW, macaddr ):
"""
Changes the mac address of a gateway host"""
if self.handle:
try:
# h1 arp -s 10.0.1.254 00:00:00:00:11:11
cmd = host + " arp -s " + GW + " " + macaddr
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "response = " + response )
main.log.info(
"Mac address of gateway " +
GW +
" changed to " +
macaddr )
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def verifyStaticGWandMAC( self, host ):
"""
Verify if the static gateway and mac address assignment"""
if self.handle:
try:
# h1 arp -an
cmd = host + " arp -an "
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( host + " arp -an = " + response )
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getMacAddress( self, host ):
"""
Verifies the host's ip configured or not."""
if self.handle:
try:
response = self.execute(
cmd=host +
" ifconfig",
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
pattern = r'HWaddr\s([0-9A-F]{2}[:-]){5}([0-9A-F]{2})'
macAddressSearch = re.search( pattern, response, re.I )
macAddress = macAddressSearch.group().split( " " )[ 1 ]
main.log.info(
self.name +
": Mac-Address of Host " +
host +
" is " +
macAddress )
return macAddress
else:
main.log.error( self.name + ": Connection failed to the host" )
def getInterfaceMACAddress( self, host, interface ):
"""
Return the IP address of the interface on the given host"""
if self.handle:
try:
response = self.execute( cmd=host + " ifconfig " + interface,
prompt="mininet>", timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
pattern = r'HWaddr\s([0-9A-F]{2}[:-]){5}([0-9A-F]{2})'
macAddressSearch = re.search( pattern, response, re.I )
if macAddressSearch is None:
main.log.info( "No mac address found in %s" % response )
return main.FALSE
macAddress = macAddressSearch.group().split( " " )[ 1 ]
main.log.info(
"Mac-Address of " +
host +
":" +
interface +
" is " +
macAddress )
return macAddress
else:
main.log.error( "Connection failed to the host" )
def getIPAddress( self, host, proto='IPV4' ):
"""
Verifies the host's ip configured or not."""
if self.handle:
try:
response = self.execute(
cmd=host +
" ifconfig",
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
pattern = ''
if proto == 'IPV4':
pattern = "inet\saddr:(\d+\.\d+\.\d+\.\d+)\s\sBcast"
else:
pattern = "inet6\saddr:\s([\w,:]*)/\d+\sScope:Global"
ipAddressSearch = re.search( pattern, response )
if not ipAddressSearch:
return None
main.log.info(
self.name +
": IP-Address of Host " +
host +
" is " +
ipAddressSearch.group( 1 ) )
return ipAddressSearch.group( 1 )
else:
main.log.error( self.name + ": Connection failed to the host" )
def getSwitchDPID( self, switch ):
"""
return the datapath ID of the switch"""
if self.handle:
cmd = "py %s.dpid" % switch
try:
response = self.execute(
cmd=cmd,
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
pattern = r'^(?P<dpid>\w)+'
result = re.search( pattern, response, re.MULTILINE )
if result is None:
main.log.info(
"Couldn't find DPID for switch %s, found: %s" %
( switch, response ) )
return main.FALSE
return str( result.group( 0 ) ).lower()
else:
main.log.error( "Connection failed to the host" )
def getDPID( self, switch ):
if self.handle:
self.handle.sendline( "" )
self.expect( "mininet>" )
cmd = "py %s.dpid" % switch
try:
response = self.execute(
cmd=cmd,
prompt="mininet>",
timeout=10 )
self.handle.expect( "mininet>" )
response = self.handle.before
return response
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getInterfaces( self, node ):
"""
return information dict about interfaces connected to the node"""
if self.handle:
cmd = 'py "\\n".join(["name=%s,mac=%s,ip=%s,enabled=%s"' +\
' % (i.name, i.MAC(), i.IP(), i.isUp())'
cmd += ' for i in %s.intfs.values()])' % node
try:
response = self.execute(
cmd=cmd,
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
return response
else:
main.log.error( "Connection failed to the node" )
def dump( self ):
main.log.info( self.name + ": Dump node info" )
try:
response = self.execute(
cmd='dump',
prompt='mininet>',
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
return response
def intfs( self ):
main.log.info( self.name + ": List interfaces" )
try:
response = self.execute(
cmd='intfs',
prompt='mininet>',
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
return response
def net( self ):
main.log.info( self.name + ": List network connections" )
try:
response = self.execute( cmd='net', prompt='mininet>', timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
return response
def links( self, timeout=1000 ):
main.log.info( self.name + ": List network links" )
try:
response = self.execute( cmd='links', prompt='mininet>',
timeout=timeout )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
return response
def iperftcpAll( self, hosts, timeout=6 ):
'''
Runs the iperftcp function with a given set of hosts and specified timeout.
@parm:
timeout: The defualt timeout is 6 sec to allow enough time for a successful test to complete,
and short enough to stop an unsuccessful test from quiting and cleaning up mininet.
'''
try:
for host1 in hosts:
for host2 in hosts:
if host1 != host2:
if self.iperftcp( host1, host2, timeout ) == main.FALSE:
main.log.error( self.name + ": iperftcp test failed for " + host1 + " and " + host2 )
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def iperftcp( self, host1="h1", host2="h2", timeout=6 ):
'''
Creates an iperf TCP test between two hosts. Returns main.TRUE if test results
are valid.
@parm:
timeout: The defualt timeout is 6 sec to allow enough time for a successful test to complete,
and short enough to stop an unsuccessful test from quiting and cleaning up mininet.
'''
main.log.info( self.name + ": Simple iperf TCP test between two hosts" )
try:
# Setup the mininet command
cmd1 = 'iperf ' + host1 + " " + host2
self.handle.sendline( cmd1 )
outcome = self.handle.expect( "mininet>", timeout )
response = self.handle.before
# checks if there are results in the mininet response
if "Results:" in response:
main.log.report( self.name + ": iperf test completed" )
# parse the mn results
response = response.split( "\r\n" )
response = response[ len( response )-2 ]
response = response.split( ": " )
response = response[ len( response )-1 ]
response = response.replace( "[", "" )
response = response.replace( "]", "" )
response = response.replace( "\'", "" )
# this is the bandwith two and from the two hosts
bandwidth = response.split( ", " )
# there should be two elements in the bandwidth list
# ['host1 to host2', 'host2 to host1"]
if len( bandwidth ) == 2:
main.log.report( self.name + ": iperf test successful" )
return main.TRUE
else:
main.log.error( self.name + ": invalid iperf results" )
return main.FALSE
else:
main.log.error( self.name + ": iperf test failed" )
return main.FALSE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + " response: " +
repr( self.handle.before ) )
# NOTE: Send ctrl-c to make sure iperf is done
self.handle.send( "\x03" )
self.handle.expect( "Interrupt" )
self.handle.expect( "mininet>" )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def iperftcpipv6( self, host1="h1", host2="h2", timeout=50 ):
main.log.info( self.name + ": Simple iperf TCP test between two hosts" )
try:
IP1 = self.getIPAddress( host1, proto='IPV6' )
cmd1 = host1 + ' iperf -V -sD -B ' + str( IP1 )
self.handle.sendline( cmd1 )
outcome1 = self.handle.expect( "mininet>" )
cmd2 = host2 + ' iperf -V -c ' + str( IP1 ) + ' -t 5'
self.handle.sendline( cmd2 )
outcome2 = self.handle.expect( "mininet>" )
response1 = self.handle.before
response2 = self.handle.after
print response1, response2
pattern = "connected with " + str( IP1 )
if pattern in response1:
main.log.report( self.name + ": iperf test completed" )
return main.TRUE
else:
main.log.error( self.name + ": iperf test failed" )
return main.FALSE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + " response: " + repr( self.handle.before ) )
self.handle.send( "\x03" )
self.handle.expect( "Interrupt" )
self.handle.expect( "mininet>" )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def iperfudpAll( self, hosts, bandwidth="10M" ):
'''
Runs the iperfudp function with a given set of hosts and specified
bandwidth
@param:
bandwidth: the targeted bandwidth, in megabits ('M')
'''
try:
for host1 in hosts:
for host2 in hosts:
if host1 != host2:
if self.iperfudp( host1, host2, bandwidth ) == main.FALSE:
main.log.error( self.name + ": iperfudp test failed for " + host1 + " and " + host2 )
except TypeError:
main.log.exception( self.name + ": Object not as expected" )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def iperfudp( self, bandwidth="10M", host1="h1", host2="h2" ):
'''
Creates an iperf UDP test with a specific bandwidth.
Returns true if results are valid.
@param:
bandwidth: the targeted bandwidth, in megabits ('M'), to run the test
'''
main.log.info( self.name + ": Simple iperf UDP test between two hosts" )
try:
# setup the mininet command
cmd = 'iperfudp ' + bandwidth + " " + host1 + " " + host2
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
response = self.handle.before
# check if there are in results in the mininet response
if "Results:" in response:
main.log.report( self.name + ": iperfudp test completed" )
# parse the results
response = response.split( "\r\n" )
response = response[ len( response )-2 ]
response = response.split( ": " )
response = response[ len( response )-1 ]
response = response.replace( "[", "" )
response = response.replace( "]", "" )
response = response.replace( "\'", "" )
mnBandwidth = response.split( ", " )
# check to see if there are at least three entries
# ['bandwidth', 'host1 to host2', 'host2 to host1']
if len( mnBandwidth ) == 3:
# if one entry is blank then something is wrong
for item in mnBandwidth:
if item == "":
main.log.error( self.name + ": Could not parse iperf output" )
main.log.error( self.name + ": invalid iperfudp results" )
return main.FALSE
# otherwise results are vaild
main.log.report( self.name + ": iperfudp test successful" )
return main.TRUE
else:
main.log.error( self.name + ": invalid iperfudp results" )
return main.FALSE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def nodes( self ):
main.log.info( self.name + ": List all nodes." )
try:
response = self.execute(
cmd='nodes',
prompt='mininet>',
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
return response
def pingpair( self ):
main.log.info( self.name + ": Ping between first two hosts" )
try:
response = self.execute(
cmd='pingpair',
prompt='mininet>',
timeout=20 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
if re.search( ',\s0\%\spacket\sloss', response ):
main.log.info( self.name + ": Ping between two hosts SUCCESSFUL" )
return main.TRUE
else:
main.log.info( self.name + ": PACKET LOST, HOSTS NOT REACHABLE" )
return main.FALSE
def link( self, **linkargs ):
"""
Bring link( s ) between two nodes up or down
"""
try:
args = utilities.parse_args( [ "END1", "END2", "OPTION" ], **linkargs )
end1 = args[ "END1" ] if args[ "END1" ] is not None else ""
end2 = args[ "END2" ] if args[ "END2" ] is not None else ""
option = args[ "OPTION" ] if args[ "OPTION" ] is not None else ""
main.log.info( "Bring link between " + str( end1 ) + " and " + str( end2 ) + " " + str( option ) )
cmd = "link {} {} {}".format( end1, end2, option )
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( response )
if "not in network" in response:
main.log.error( self.name + ": Could not find one of the endpoints of the link" )
return main.FALSE
return main.TRUE
except pexpect.TIMEOUT:
main.log.exception( self.name + ": Command timed out" )
return None
except pexpect.EOF:
main.log.exception( self.name + ": connection closed." )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def switch( self, **switchargs ):
"""
start/stop a switch
"""
args = utilities.parse_args( [ "SW", "OPTION" ], **switchargs )
sw = args[ "SW" ] if args[ "SW" ] is not None else ""
option = args[ "OPTION" ] if args[ "OPTION" ] is not None else ""
command = "switch " + str( sw ) + " " + str( option )
main.log.info( command )
try:
self.handle.sendline( command )
self.handle.expect( "mininet>" )
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
return main.TRUE
def node( self, nodeName, commandStr ):
"""
Carry out a command line on a given node
@parm:
nodeName: the node name in Mininet testbed
commandStr: the command line will be carried out on the node
Example: main.Mininet.node( nodeName="h1", commandStr="ls" )
"""
command = str( nodeName ) + " " + str( commandStr )
main.log.info( command )
try:
response = self.execute( cmd = command, prompt = "mininet>" )
if re.search( "Unknown command", response ):
main.log.warn( response )
return main.FALSE
if re.search( "Permission denied", response ):
main.log.warn( response )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
main.log.info( " response is :" )
main.log.info( response )
return response
def yank( self, **yankargs ):
"""
yank a mininet switch interface to a host"""
main.log.info( 'Yank the switch interface attached to a host' )
args = utilities.parse_args( [ "SW", "INTF" ], **yankargs )
sw = args[ "SW" ] if args[ "SW" ] is not None else ""
intf = args[ "INTF" ] if args[ "INTF" ] is not None else ""
command = "py " + str( sw ) + '.detach("' + str( intf ) + '")'
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
return main.TRUE
def plug( self, **plugargs ):
"""
plug the yanked mininet switch interface to a switch"""
main.log.info( 'Plug the switch interface attached to a switch' )
args = utilities.parse_args( [ "SW", "INTF" ], **plugargs )
sw = args[ "SW" ] if args[ "SW" ] is not None else ""
intf = args[ "INTF" ] if args[ "INTF" ] is not None else ""
command = "py " + str( sw ) + '.attach("' + str( intf ) + '")'
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
return main.TRUE
def dpctl( self, **dpctlargs ):
"""
Run dpctl command on all switches."""
main.log.info( 'Run dpctl command on all switches' )
args = utilities.parse_args( [ "CMD", "ARGS" ], **dpctlargs )
cmd = args[ "CMD" ] if args[ "CMD" ] is not None else ""
cmdargs = args[ "ARGS" ] if args[ "ARGS" ] is not None else ""
command = "dpctl " + cmd + " " + str( cmdargs )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
return main.TRUE
def getVersion( self ):
# FIXME: What uses this? This should be refactored to get
# version from MN and not some other file
try:
fileInput = path + '/lib/Mininet/INSTALL'
version = super( Mininet, self ).getVersion()
pattern = 'Mininet\s\w\.\w\.\w\w*'
for line in open( fileInput, 'r' ).readlines():
result = re.match( pattern, line )
if result:
version = result.group( 0 )
return version
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getSwController( self, sw ):
"""
Parameters:
sw: The name of an OVS switch. Example "s1"
Return:
The output of the command from the mininet cli
or main.FALSE on timeout"""
command = "sh ovs-vsctl get-controller " + str( sw )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
if response:
if "no bridge named" in response:
main.log.error( self.name + ": Error in getSwController: " +
self.handle.before )
return main.FALSE
else:
return response
else:
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def assignSwController( self, sw, ip, port="6653", ptcp="" ):
"""
Description:
Assign switches to the controllers ( for ovs use only )
Required:
sw - Name of the switch. This can be a list or a string.
ip - Ip addresses of controllers. This can be a list or a string.
Optional:
port - ONOS use port 6653, if no list of ports is passed, then
the all the controller will use 6653 as their port number
ptcp - ptcp number, This can be a string or a list that has
the same length as switch. This is optional and not required
when using ovs switches.
NOTE: If switches and ptcp are given in a list type they should have the
same length and should be in the same order, Eg. sw=[ 's1' ... n ]
ptcp=[ '6637' ... n ], s1 has ptcp number 6637 and so on.
Return:
Returns main.TRUE if mininet correctly assigned switches to
controllers, otherwise it will return main.FALSE or an appropriate
exception(s)
"""
assignResult = main.TRUE
# Initial ovs command
commandList = []
command = "sh ovs-vsctl set-controller "
onosIp = ""
try:
if isinstance( ip, types.StringType ):
onosIp = "tcp:" + str( ip ) + ":"
if isinstance( port, types.StringType ) or \
isinstance( port, types.IntType ):
onosIp += str( port )
elif isinstance( port, types.ListType ):
main.log.error( self.name + ": Only one controller " +
"assigned and a list of ports has" +
" been passed" )
return main.FALSE
else:
main.log.error( self.name + ": Invalid controller port " +
"number. Please specify correct " +
"controller port" )
return main.FALSE
elif isinstance( ip, types.ListType ):
if isinstance( port, types.StringType ) or \
isinstance( port, types.IntType ):
for ipAddress in ip:
onosIp += "tcp:" + str( ipAddress ) + ":" + \
str( port ) + " "
elif isinstance( port, types.ListType ):
if ( len( ip ) != len( port ) ):
main.log.error( self.name + ": Port list = " +
str( len( port ) ) +
"should be the same as controller" +
" ip list = " + str( len( ip ) ) )
return main.FALSE
else:
onosIp = ""
for ipAddress, portNum in zip( ip, port ):
onosIp += "tcp:" + str( ipAddress ) + ":" + \
str( portNum ) + " "
else:
main.log.error( self.name + ": Invalid controller port " +
"number. Please specify correct " +
"controller port" )
return main.FALSE
else:
main.log.error( self.name + ": Invalid ip address" )
return main.FALSE
if isinstance( sw, types.StringType ):
command += sw + " "
if ptcp:
if isinstance( ptcp, types.StringType ):
command += "ptcp:" + str( ptcp ) + " "
elif isinstance( ptcp, types.ListType ):
main.log.error( self.name + ": Only one switch is " +
"being set and multiple PTCP is " +
"being passed " )
else:
main.log.error( self.name + ": Invalid PTCP" )
ptcp = ""
command += onosIp
commandList.append( command )
elif isinstance( sw, types.ListType ):
if ptcp:
if isinstance( ptcp, types.ListType ):
if len( ptcp ) != len( sw ):
main.log.error( self.name + ": PTCP length = " +
str( len( ptcp ) ) +
" is not the same as switch" +
" length = " +
str( len( sw ) ) )
return main.FALSE
else:
for switch, ptcpNum in zip( sw, ptcp ):
tempCmd = "sh ovs-vsctl set-controller "
tempCmd += switch + " ptcp:" + \
str( ptcpNum ) + " "
tempCmd += onosIp
commandList.append( tempCmd )
else:
main.log.error( self.name + ": Invalid PTCP" )
return main.FALSE
else:
for switch in sw:
tempCmd = "sh ovs-vsctl set-controller "
tempCmd += switch + " " + onosIp
commandList.append( tempCmd )
else:
main.log.error( self.name + ": Invalid switch type " )
return main.FALSE
for cmd in commandList:
try:
self.execute( cmd=cmd, prompt="mininet>", timeout=5 )
if "no bridge named" in self.handle.before:
main.log.error( self.name + ": Error in assignSwController: " +
self.handle.before )
except pexpect.TIMEOUT:
main.log.error( self.name + ": pexpect.TIMEOUT found" )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
return main.TRUE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def deleteSwController( self, sw ):
"""
Removes the controller target from sw"""
command = "sh ovs-vsctl del-controller " + str( sw )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
else:
main.log.info( response )
def addSwitch( self, sw, **kwargs ):
"""
adds a switch to the mininet topology
NOTE: This uses a custom mn function. MN repo should be on
dynamic_topo branch
NOTE: cannot currently specify what type of switch
required params:
sw = name of the new switch as a string
optional keywords:
dpid = "dpid"
returns: main.FALSE on an error, else main.TRUE
"""
dpid = kwargs.get( 'dpid', '' )
command = "addswitch " + str( sw ) + " " + str( dpid )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
if re.search( "already exists!", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "Error", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "usage:", response ):
main.log.warn( response )
return main.FALSE
else:
return main.TRUE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def delSwitch( self, sw ):
"""
delete a switch from the mininet topology
NOTE: This uses a custom mn function. MN repo should be on
dynamic_topo branch
required params:
sw = name of the switch as a string
returns: main.FALSE on an error, else main.TRUE"""
command = "delswitch " + str( sw )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
if re.search( "no switch named", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "Error", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "usage:", response ):
main.log.warn( response )
return main.FALSE
else:
return main.TRUE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getSwitchRandom( self, timeout=60, nonCut=True ):
"""
Randomly get a switch from Mininet topology.
If nonCut is True, it gets a list of non-cut switches (the deletion
of a non-cut switch will not increase the number of connected
components of a graph) and randomly returns one of them, otherwise
it just randomly returns one switch from all current switches in
Mininet.
Returns the name of the chosen switch.
"""
import random
candidateSwitches = []
try:
if not nonCut:
switches = self.getSwitches( timeout=timeout )
assert len( switches ) != 0
for switchName in switches.keys():
candidateSwitches.append( switchName )
else:
graphDict = self.getGraphDict( timeout=timeout, useId=False )
if graphDict is None:
return None
self.graph.update( graphDict )
candidateSwitches = self.graph.getNonCutVertices()
if candidateSwitches is None:
return None
elif len( candidateSwitches ) == 0:
main.log.info( self.name + ": No candidate switch for deletion" )
return None
else:
switch = random.sample( candidateSwitches, 1 )
return switch[ 0 ]
except KeyError:
main.log.exception( self.name + ": KeyError exception found" )
return None
except AssertionError:
main.log.exception( self.name + ": AssertionError exception found" )
return None
except Exception:
main.log.exception( self.name + ": Uncaught exception" )
return None
def delSwitchRandom( self, timeout=60, nonCut=True ):
"""
Randomly delete a switch from Mininet topology.
If nonCut is True, it gets a list of non-cut switches (the deletion
of a non-cut switch will not increase the number of connected
components of a graph) and randomly chooses one for deletion,
otherwise it just randomly delete one switch from all current
switches in Mininet.
Returns the name of the deleted switch
"""
try:
switch = self.getSwitchRandom( timeout, nonCut )
if switch is None:
return None
else:
deletionResult = self.delSwitch( switch )
if deletionResult:
return switch
else:
return None
except Exception:
main.log.exception( self.name + ": Uncaught exception" )
return None
def addLink( self, node1, node2 ):
"""
add a link to the mininet topology
NOTE: This uses a custom mn function. MN repo should be on
dynamic_topo branch
NOTE: cannot currently specify what type of link
required params:
node1 = the string node name of the first endpoint of the link
node2 = the string node name of the second endpoint of the link
returns: main.FALSE on an error, else main.TRUE"""
command = "addlink " + str( node1 ) + " " + str( node2 )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
if re.search( "doesnt exist!", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "Error", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "usage:", response ):
main.log.warn( response )
return main.FALSE
else:
return main.TRUE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def delLink( self, node1, node2 ):
"""
delete a link from the mininet topology
NOTE: This uses a custom mn function. MN repo should be on
dynamic_topo branch
required params:
node1 = the string node name of the first endpoint of the link
node2 = the string node name of the second endpoint of the link
returns: main.FALSE on an error, else main.TRUE
"""
command = "dellink " + str( node1 ) + " " + str( node2 )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
if re.search( "no node named", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "Error", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "usage:", response ):
main.log.warn( response )
return main.FALSE
else:
return main.TRUE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getLinkRandom( self, timeout=60, nonCut=True ):
"""
Randomly get a link from Mininet topology.
If nonCut is True, it gets a list of non-cut links (the deletion
of a non-cut link will not increase the number of connected
component of a graph) and randomly returns one of them, otherwise
it just randomly returns one link from all current links in
Mininet.
Returns the link as a list, e.g. [ 's1', 's2' ]
"""
import random
candidateLinks = []
try:
if not nonCut:
links = self.getLinks( timeout=timeout )
assert len( links ) != 0
for link in links:
# Exclude host-switch link
if link[ 'node1' ].startswith( 'h' ) or link[ 'node2' ].startswith( 'h' ):
continue
candidateLinks.append( [ link[ 'node1' ], link[ 'node2' ] ] )
else:
graphDict = self.getGraphDict( timeout=timeout, useId=False )
if graphDict is None:
return None
self.graph.update( graphDict )
candidateLinks = self.graph.getNonCutEdges()
if candidateLinks is None:
return None
elif len( candidateLinks ) == 0:
main.log.info( self.name + ": No candidate link for deletion" )
return None
else:
link = random.sample( candidateLinks, 1 )
return link[ 0 ]
except KeyError:
main.log.exception( self.name + ": KeyError exception found" )
return None
except AssertionError:
main.log.exception( self.name + ": AssertionError exception found" )
return None
except Exception:
main.log.exception( self.name + ": Uncaught exception" )
return None
def delLinkRandom( self, timeout=60, nonCut=True ):
"""
Randomly delete a link from Mininet topology.
If nonCut is True, it gets a list of non-cut links (the deletion
of a non-cut link will not increase the number of connected
component of a graph) and randomly chooses one for deletion,
otherwise it just randomly delete one link from all current links
in Mininet.
Returns the deleted link as a list, e.g. [ 's1', 's2' ]
"""
try:
link = self.getLinkRandom( timeout, nonCut )
if link is None:
return None
else:
deletionResult = self.delLink( link[ 0 ], link[ 1 ] )
if deletionResult:
return link
else:
return None
except Exception:
main.log.exception( self.name + ": Uncaught exception" )
return None
def addHost( self, hostname, **kwargs ):
"""
Add a host to the mininet topology
NOTE: This uses a custom mn function. MN repo should be on
dynamic_topo branch
NOTE: cannot currently specify what type of host
required params:
hostname = the string hostname
optional key-value params
switch = "switch name"
returns: main.FALSE on an error, else main.TRUE
"""
switch = kwargs.get( 'switch', '' )
command = "addhost " + str( hostname ) + " " + str( switch )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
if re.search( "already exists!", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "doesnt exists!", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "Error", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "usage:", response ):
main.log.warn( response )
return main.FALSE
else:
return main.TRUE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def delHost( self, hostname ):
"""
delete a host from the mininet topology
NOTE: This uses a custom mn function. MN repo should be on
dynamic_topo branch
NOTE: this uses a custom mn function
required params:
hostname = the string hostname
returns: main.FALSE on an error, else main.TRUE"""
command = "delhost " + str( hostname )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
if re.search( "no host named", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "Error", response ):
main.log.warn( response )
return main.FALSE
elif re.search( "usage:", response ):
main.log.warn( response )
return main.FALSE
else:
return main.TRUE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def disconnect( self ):
"""
Called at the end of the test to stop the mininet and
disconnect the handle.
"""
try:
self.handle.sendline( '' )
i = self.handle.expect( [ 'mininet>', self.hostPrompt, pexpect.EOF, pexpect.TIMEOUT ],
timeout=2 )
response = main.TRUE
if i == 0:
response = self.stopNet()
elif i == 2:
return main.TRUE
# print "Disconnecting Mininet"
if self.handle:
self.handle.sendline( "exit" )
self.handle.expect( "exit" )
self.handle.expect( "(.*)" )
else:
main.log.error( "Connection failed to the host" )
return response
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def stopNet( self, fileName="", timeout=5, exitTimeout=1000 ):
"""
Stops mininet.
Returns main.TRUE if the mininet successfully stops and
main.FALSE if the pexpect handle does not exist.
Will cleanup and exit the test if mininet fails to stop
"""
main.log.info( self.name + ": Stopping mininet..." )
response = ''
if self.handle:
try:
self.handle.sendline( "" )
i = self.handle.expect( [ 'mininet>',
self.prompt,
pexpect.EOF,
pexpect.TIMEOUT ],
timeout )
if i == 0:
main.log.info( "Exiting mininet.." )
startTime = time.time()
response = self.execute( cmd="exit",
prompt=self.prompt,
timeout=exitTimeout )
main.log.info( self.name + ": Stopped\nTime Took : " + str( time.time() - startTime ) )
self.handle.sendline( "sudo mn -c" )
response = main.TRUE
elif i == 1:
main.log.info( " Mininet trying to exit while not " +
"in the mininet prompt" )
response = main.TRUE
elif i == 2:
main.log.error( "Something went wrong exiting mininet" )
elif i == 3: # timeout
main.log.error( "Something went wrong exiting mininet " +
"TIMEOUT" )
self.handle.sendline( "" )
self.handle.expect( self.prompt )
self.handle.sendline( "sudo killall -9 dhclient dhcpd zebra bgpd" )
if fileName:
self.handle.sendline( "" )
self.handle.expect( self.prompt )
self.handle.sendline(
"sudo kill -9 \`ps -ef | grep \"" +
fileName +
"\" | grep -v grep | awk '{print $2}'\`" )
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
else:
main.log.error( self.name + ": Connection failed to the host" )
response = main.FALSE
return response
def arping( self, srcHost="", dstHost="10.128.20.211", ethDevice="", output=True, noResult=False ):
"""
Description:
Sends arp message from mininet host for hosts discovery
Required:
host - hosts name
Optional:
ip - ip address that does not exist in the network so there would
be no reply.
"""
if ethDevice:
ethDevice = '-I ' + ethDevice + ' '
cmd = srcHost + " arping -c1 "
if noResult:
cmd += "-w10 " # If we don't want the actural arping result, set -w10, arping will exit after 10 ms.
cmd += ethDevice + dstHost
try:
if output:
main.log.info( "Sending: " + cmd )
self.handle.sendline( cmd )
i = self.handle.expect( [ "mininet>", "arping: " ] )
if i == 0:
return main.TRUE
elif i == 1:
response = self.handle.before + self.handle.after
self.handle.expect( "mininet>" )
response += self.handle.before + self.handle.after
main.log.warn( "Error sending arping, output was: " +
response )
return main.FALSE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.warn( self.handle.before )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def decToHex( self, num ):
return hex( num ).split( 'x' )[ 1 ]
def getSwitchFlowCount( self, switch ):
"""
return the Flow Count of the switch"""
if self.handle:
cmd = "sh ovs-ofctl dump-aggregate %s" % switch
try:
response = self.execute(
cmd=cmd,
prompt="mininet>",
timeout=10 )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + " " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
pattern = "flow_count=(\d+)"
result = re.search( pattern, response, re.MULTILINE )
if result is None:
main.log.info(
"Couldn't find flows on switch %s, found: %s" %
( switch, response ) )
return main.FALSE
return result.group( 1 )
else:
main.log.error( "Connection failed to the Mininet host" )
def checkFlows( self, sw, dumpFormat=None ):
if dumpFormat:
command = "sh ovs-ofctl -F " + \
dumpFormat + " dump-flows " + str( sw )
else:
command = "sh ovs-ofctl dump-flows " + str( sw )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
return response
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def flowTableComp( self, flowTable1, flowTable2 ):
# This function compares the selctors and treatments of each flow
try:
assert flowTable1, "flowTable1 is empty or None"
assert flowTable2, "flowTable2 is empty or None"
returnValue = main.TRUE
if len( flowTable1 ) != len( flowTable2 ):
main.log.warn( "Flow table lengths do not match" )
returnValue = main.FALSE
dFields = [ "n_bytes", "cookie", "n_packets", "duration" ]
for flow1, flow2 in zip( flowTable1, flowTable2 ):
for field in dFields:
try:
flow1.pop( field )
except KeyError:
pass
try:
flow2.pop( field )
except KeyError:
pass
for i in range( len( flowTable1 ) ):
if flowTable1[ i ] not in flowTable2:
main.log.warn( "Flow tables do not match:" )
main.log.warn( "Old flow:\n{}\n not in new flow table".format( flowTable1[ i ] ) )
returnValue = main.FALSE
break
return returnValue
except AssertionError:
main.log.exception( "Nothing to compare" )
return main.FALSE
except Exception:
main.log.exception( "Uncaught exception!" )
main.cleanAndExit()
def parseFlowTable( self, flowTable, version="", debug=True ):
'''
Discription: Parses flows into json format.
NOTE: this can parse any string thats separated with commas
Arguments:
Required:
flows: a list of strings that represnt flows
Optional:
version: The version of OpenFlow. Currently, 1.3 and 1.0 are supported.
debug: prints out the final result
returns: A list of flows in json format
'''
jsonFlowTable = []
try:
for flow in flowTable:
jsonFlow = {}
# split up the fields of the flow
parsedFlow = flow.split( ", " )
# get rid of any spaces in front of the field
for i in range( len( parsedFlow ) ):
item = parsedFlow[ i ]
if item[ 0 ] == " ":
parsedFlow[ i ] = item[ 1: ]
# grab the selector and treatment from the parsed flow
# the last element is the selector and the treatment
temp = parsedFlow.pop( -1 )
# split up the selector and the treatment
temp = temp.split( " " )
index = 0
# parse the flags
# NOTE: This only parses one flag
flag = {}
if version == "1.3":
flag = { "flag": [ temp[ index ] ] }
index += 1
# the first element is the selector and split it up
sel = temp[ index ]
index += 1
sel = sel.split( "," )
# the priority is stuck in the selecter so put it back
# in the flow
if 'priority' in sel[0]:
parsedFlow.append( sel.pop( 0 ) )
# parse selector
criteria = []
for item in sel:
# this is the type of the packet e.g. "arp"
if "=" not in item:
criteria.append( { "type": item } )
else:
field = item.split( "=" )
criteria.append( { field[ 0 ]: field[ 1 ] } )
selector = { "selector": { "criteria": sorted( criteria ) } }
treat = temp[ index ]
# get rid of the action part e.g. "action=output:2"
# we will add it back later
treat = treat.split( "=" )
treat.pop( 0 )
# parse treatment
action = []
for item in treat:
if ":" in item:
field = item.split( ":" )
action.append( { field[ 0 ]: field[ 1 ] } )
else:
main.log.warn( "Do not know how to process this treatment:{}, ignoring.".format(
item ) )
# create the treatment field and add the actions
treatment = { "treatment": { "action": sorted( action ) } }
# parse the rest of the flow
for item in parsedFlow:
field = item.split( "=" )
jsonFlow.update( { field[ 0 ]: field[ 1 ] } )
# add the treatment and the selector to the json flow
jsonFlow.update( selector )
jsonFlow.update( treatment )
jsonFlow.update( flag )
if debug:
main.log.debug( "\033[94mJson flow:\033[0m\n{}\n".format( jsonFlow ) )
# add the json flow to the json flow table
jsonFlowTable.append( jsonFlow )
return jsonFlowTable
except IndexError:
main.log.exception( self.name + ": IndexError found" )
return None
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getFlowTable( self, sw, version="", debug=False ):
'''
Discription: Returns the flow table(s) on a switch or switches in a list.
Each element is a flow.
Arguments:
Required:
sw: The switch name ("s1") to retrive the flow table. Can also be
a list of switches.
Optional:
version: The version of OpenFlow. Currently, 1.3 and 1.0 are supported.
debug: prints out the final result
'''
try:
switches = []
if isinstance( sw, list ):
switches.extend( sw )
else:
switches.append( sw )
flows = []
for s in switches:
cmd = "sh ovs-ofctl dump-flows " + s
if "1.0" == version:
cmd += " -F OpenFlow10-table_id"
elif "1.3" == version:
cmd += " -O OpenFlow13"
main.log.info( "Sending: " + cmd )
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
response = self.handle.before
response = response.split( "\r\n" )
# dump the first two elements and the last
# the first element is the command that was sent
# the second is the table header
# the last element is empty
response = response[ 2:-1 ]
flows.extend( response )
if debug:
print "Flows:\n{}\n\n".format( flows )
return self.parseFlowTable( flows, version, debug )
except pexpect.EOF:
main.log.exception( self.name + ": connection closed." )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def checkFlowId( self, sw, flowId, version="1.3", debug=True ):
'''
Discription: Checks whether the ID provided matches a flow ID in Mininet
Arguments:
Required:
sw: The switch name ("s1") to retrive the flow table. Can also be
a list of switches.
flowId: the flow ID in hex format. Can also be a list of IDs
Optional:
version: The version of OpenFlow. Currently, 1.3 and 1.0 are supported.
debug: prints out the final result
returns: main.TRUE if all IDs are present, otherwise returns main.FALSE
NOTE: prints out IDs that are not present
'''
try:
main.log.info( "Getting flows from Mininet" )
flows = self.getFlowTable( sw, version, debug )
if flows is None:
return main.ERROR
if debug:
print "flow ids:\n{}\n\n".format( flowId )
# Check flowId is a list or a string
if isinstance( flowId, str ):
result = False
for f in flows:
if flowId in f.get( 'cookie' ):
result = True
break
# flowId is a list
else:
result = True
# Get flow IDs from Mininet
mnFlowIds = [ f.get( 'cookie' ) for f in flows ]
# Save the IDs that are not in Mininet
absentIds = [ x for x in flowId if x not in mnFlowIds ]
if debug:
print "mn flow ids:\n{}\n\n".format( mnFlowIds )
# Print out the IDs that are not in Mininet
if absentIds:
main.log.warn( "Absent ids: {}".format( absentIds ) )
result = False
return main.TRUE if result else main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def startTcpdump( self, filename, intf="eth0", port="port 6653" ):
"""
Runs tpdump on an interface and saves the file
intf can be specified, or the default eth0 is used"""
try:
self.handle.sendline( "" )
self.handle.expect( "mininet>" )
self.handle.sendline(
"sh sudo tcpdump -n -i " +
intf +
" " +
port +
" -w " +
filename.strip() +
" &" )
self.handle.sendline( "" )
i = self.handle.expect( [ 'No\ssuch\device',
'listening\son',
pexpect.TIMEOUT,
"mininet>" ],
timeout=10 )
main.log.warn( self.handle.before + self.handle.after )
self.handle.sendline( "" )
self.handle.expect( "mininet>" )
if i == 0:
main.log.error(
self.name +
": tcpdump - No such device exists. " +
"tcpdump attempted on: " +
intf )
return main.FALSE
elif i == 1:
main.log.info( self.name + ": tcpdump started on " + intf )
return main.TRUE
elif i == 2:
main.log.error(
self.name +
": tcpdump command timed out! Check interface name," +
" given interface was: " +
intf )
return main.FALSE
elif i == 3:
main.log.info( self.name + ": " + self.handle.before )
return main.TRUE
else:
main.log.error( self.name + ": tcpdump - unexpected response" )
return main.FALSE
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def stopTcpdump( self ):
"""
pkills tcpdump"""
try:
self.handle.sendline( "sh sudo pkill tcpdump" )
self.handle.expect( "mininet>" )
self.handle.sendline( "" )
self.handle.expect( "mininet>" )
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getPorts( self, nodeName, verbose=False ):
"""
Read ports from a Mininet switch.
Returns a json structure containing information about the
ports of the given switch.
"""
try:
response = self.getInterfaces( nodeName )
# TODO: Sanity check on response. log if no such switch exists
ports = []
for line in response.split( "\n" ):
if not line.startswith( "name=" ):
continue
portVars = {}
for var in line.split( "," ):
key, value = var.split( "=" )
portVars[ key ] = value
isUp = portVars.pop( 'enabled', "True" )
isUp = "True" in isUp
if verbose:
main.log.info( "Reading switch port %s(%s)" %
( portVars[ 'name' ], portVars[ 'mac' ] ) )
mac = portVars[ 'mac' ]
if mac == 'None':
mac = None
ips = []
ip = portVars[ 'ip' ]
if ip == 'None':
ip = None
ips.append( ip )
name = portVars[ 'name' ]
if name == 'None':
name = None
portRe = r'[^\-]\d\-eth(?P<port>\d+)'
if name == 'lo':
portNo = 0xfffe # TODO: 1.0 value - Should we just return lo?
else:
portNo = re.search( portRe, name ).group( 'port' )
ports.append( { 'of_port': portNo,
'mac': str( mac ).replace( '\'', '' ),
'name': name,
'ips': ips,
'enabled': isUp } )
return ports
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getOVSPorts( self, nodeName ):
"""
Read ports from OVS by executing 'ovs-ofctl dump-ports-desc' command.
Returns a list of dictionaries containing information about each
port of the given switch.
"""
command = "sh ovs-ofctl dump-ports-desc " + str( nodeName )
try:
response = self.execute(
cmd=command,
prompt="mininet>",
timeout=10 )
ports = []
if response:
for line in response.split( "\n" ):
# Regex patterns to parse 'ovs-ofctl dump-ports-desc' output
# Example port:
# 1(s1-eth1): addr:ae:60:72:77:55:51
pattern = "(?P<index>\d+)\((?P<name>[^-]+-eth(?P<port>\d+))\):\saddr:(?P<mac>([a-f0-9]{2}:){5}[a-f0-9]{2})"
result = re.search( pattern, line )
if result:
index = result.group( 'index' )
name = result.group( 'name' )
# This port number is extracted from port name
port = result.group( 'port' )
mac = result.group( 'mac' )
ports.append( { 'index': index,
'name': name,
'port': port,
'mac': mac } )
return ports
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getSwitches( self, verbose=False, updateTimeout=1000 ):
"""
Read switches from Mininet.
Returns a dictionary whose keys are the switch names and the value is
a dictionary containing information about the switch.
"""
# NOTE: To support new Mininet switch classes, just append the new
# class to the switchClasses variable
# Regex patterns to parse 'dump' output
# Example Switches:
# <OVSSwitch s1: lo:127.0.0.1,s1-eth1:None,s1-eth2:None,s1-eth3:None pid=5238>
# <OVSSwitch{ 'protocols': 'OpenFlow10' } s1: lo:127.0.0.1,s1-eth1:None,s1-eth2:None pid=25974>
# <OVSSwitchNS s1: lo:127.0.0.1,s1-eth1:None,s1-eth2:None,s1-eth3:None pid=22550>
# <OVSBridge s1: lo:127.0.0.1,s1-eth1:None,s1-eth2:None pid=26830>
# <UserSwitch s1: lo:127.0.0.1,s1-eth1:None,s1-eth2:None pid=14737>
try:
switchClasses = r"(OVSSwitch)|(OVSBridge)|(OVSSwitchNS)|(IVSSwitch)|(LinuxBridge)|(UserSwitch)"
swRE = r"<(?P<class>" + switchClasses + r")" +\
r"(?P<options>\{.*\})?\s" +\
r"(?P<name>[^:]+)\:\s" +\
r"(?P<ports>([^,]+,)*[^,\s]+)" +\
r"\spid=(?P<pid>(\d)+)"
# Update mn port info
self.update( updateTimeout )
output = {}
dump = self.dump().split( "\n" )
for line in dump:
result = re.search( swRE, line, re.I )
if result:
name = result.group( 'name' )
dpid = str( self.getSwitchDPID( name ) ).zfill( 16 )
pid = result.group( 'pid' )
swClass = result.group( 'class' )
options = result.group( 'options' )
if verbose:
main.log.info( "Reading switch %s(%s)" % ( name, dpid ) )
ports = self.getPorts( name )
output[ name ] = { "dpid": dpid,
"ports": ports,
"swClass": swClass,
"pid": pid,
"options": options }
return output
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getHosts( self, verbose=False, update=True, updateTimeout=1000,
hostClass=[ "Host", "DhcpClient", "Dhcp6Client", "DhcpServer", "Dhcp6Server", "DhcpRelay" ],
getInterfaces=True ):
"""
Read hosts from Mininet.
Optional:
hostClass: it is used to match the class of the mininet host. It
can be a string or a list of strings.
Returns a dictionary whose keys are the host names and the value is
a dictionary containing information about the host.
"""
# Regex patterns to parse dump output
# Example host: <Host h1: h1-eth0:10.0.0.1 pid=5227>
# <Host h1: pid=12725>
# <VLANHost h12: h12-eth0.100.100.100:100.1.0.3 pid=30186>
# <dualStackHost h19: h19-eth0:10.1.0.9 pid=30200>
# <IPv6Host h18: h18-eth0:10.0.0.18 pid=30198>
# NOTE: Does not correctly match hosts with multi-links
# <Host h2: h2-eth0:10.0.0.2,h2-eth1:10.0.1.2 pid=14386>
# FIXME: Fix that
try:
if not isinstance( hostClass, types.ListType ):
hostClass = [ str( hostClass ) ]
classRE = "(" + "|".join([c for c in hostClass]) + ")"
ifaceRE = r"(?P<ifname>[^:]+)\:(?P<ip>[^\s,]+),?"
ifacesRE = r"(?P<ifaces>[^:]+\:[^\s]+)"
hostRE = r"" + classRE + "\s(?P<name>[^:]+)\:(" + ifacesRE + "*\spid=(?P<pid>[^>]+))"
if update:
# update mn port info
self.update( updateTimeout )
# Get mininet dump
dump = self.dump().split( "\n" )
hosts = {}
for line in dump:
result = re.search( hostRE, line )
if result:
name = result.group( 'name' )
interfaces = []
if getInterfaces:
response = self.getInterfaces( name )
# Populate interface info
for line in response.split( "\n" ):
if line.startswith( "name=" ):
portVars = {}
for var in line.split( "," ):
key, value = var.split( "=" )
portVars[ key ] = value
isUp = portVars.pop( 'enabled', "True" )
isUp = "True" in isUp
if verbose:
main.log.info( "Reading host port %s(%s)" %
( portVars[ 'name' ],
portVars[ 'mac' ] ) )
mac = portVars[ 'mac' ]
if mac == 'None':
mac = None
ips = []
ip = portVars[ 'ip' ]
if ip == 'None':
ip = None
ips.append( ip )
intfName = portVars[ 'name' ]
if name == 'None':
name = None
interfaces.append( {
"name": intfName,
"ips": ips,
"mac": str( mac ),
"isUp": isUp } )
hosts[ name ] = { "interfaces": interfaces }
return hosts
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getLinks( self, timeout=20, updateTimeout=1000 ):
"""
Gathers information about current Mininet links. These links may not
be up if one of the ports is down.
Returns a list of dictionaries with link endpoints.
The dictionary structure is:
{ 'node1': str( node1 name )
'node2': str( node2 name )
'port1': str( port1 of_port )
'port2': str( port2 of_port ) }
Note: The port number returned is the eth#, not necessarily the of_port
number. In Mininet, for OVS switch, these should be the same. For
hosts, this is just the eth#.
"""
try:
self.update()
response = self.links( timeout=timeout ).split( '\n' )
# Examples:
# s1-eth3<->s2-eth1 (OK OK)
# s13-eth3<->h27-eth0 (OK OK)
linkRE = "(?P<node1>[\w]+)\-eth(?P<port1>[\d]+)\<\-\>" +\
"(?P<node2>[\w]+)\-eth(?P<port2>[\d]+)"
links = []
for line in response:
match = re.search( linkRE, line )
if match:
node1 = match.group( 'node1' )
node2 = match.group( 'node2' )
port1 = match.group( 'port1' )
port2 = match.group( 'port2' )
links.append( { 'node1': node1,
'node2': node2,
'port1': port1,
'port2': port2 } )
return links
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def compareSwitches( self, switches, switchesJson, portsJson ):
"""
Compare mn and onos switches
switchesJson: parsed json object from the onos devices api
Dependencies:
1. numpy - "sudo pip install numpy"
"""
from numpy import uint64
# created sorted list of dpid's in MN and ONOS for comparison
try:
mnDPIDs = []
for swName, switch in switches.iteritems():
mnDPIDs.append( switch[ 'dpid' ].lower() )
mnDPIDs.sort()
if switchesJson == "": # if rest call fails
main.log.error(
self.name +
".compareSwitches(): Empty JSON object given from ONOS" )
return main.FALSE
onos = switchesJson
onosDPIDs = []
for switch in onos:
if switch[ 'available' ]:
onosDPIDs.append(
switch[ 'id' ].replace(
":",
'' ).replace(
"of",
'' ).lower() )
onosDPIDs.sort()
if mnDPIDs != onosDPIDs:
switchResults = main.FALSE
main.log.error( "Switches in MN but not in ONOS:" )
list1 = [ switch for switch in mnDPIDs if switch not in onosDPIDs ]
main.log.error( str( list1 ) )
main.log.error( "Switches in ONOS but not in MN:" )
list2 = [ switch for switch in onosDPIDs if switch not in mnDPIDs ]
main.log.error( str( list2 ) )
else: # list of dpid's match in onos and mn
switchResults = main.TRUE
finalResults = switchResults
# FIXME: this does not look for extra ports in ONOS, only checks that
# ONOS has what is in MN
portsResults = main.TRUE
# PORTS
for name, mnSwitch in switches.iteritems():
mnPorts = []
onosPorts = []
switchResult = main.TRUE
for port in mnSwitch[ 'ports' ]:
if port[ 'enabled' ]:
mnPorts.append( int( port[ 'of_port' ] ) )
for onosSwitch in portsJson:
if onosSwitch[ 'device' ][ 'available' ]:
if onosSwitch[ 'device' ][ 'id' ].replace(
':',
'' ).replace(
"of",
'' ) == mnSwitch[ 'dpid' ]:
for port in onosSwitch[ 'ports' ]:
if port[ 'isEnabled' ]:
if port[ 'port' ].lower() == 'local':
# onosPorts.append( 'local' )
onosPorts.append( long( uint64( -2 ) ) )
else:
onosPorts.append( int( port[ 'port' ] ) )
break
mnPorts.sort( key=float )
onosPorts.sort( key=float )
mnPortsLog = mnPorts
onosPortsLog = onosPorts
mnPorts = [ x for x in mnPorts ]
onosPorts = [ x for x in onosPorts ]
# TODO: handle other reserved port numbers besides LOCAL
# NOTE: Reserved ports
# Local port: -2 in Openflow, ONOS shows 'local', we store as
# long( uint64( -2 ) )
for mnPort in mnPortsLog:
if mnPort in onosPorts:
# don't set results to true here as this is just one of
# many checks and it might override a failure
mnPorts.remove( mnPort )
onosPorts.remove( mnPort )
# NOTE: OVS reports this as down since there is no link
# So ignoring these for now
# TODO: Come up with a better way of handling these
if 65534 in mnPorts:
mnPorts.remove( 65534 )
if long( uint64( -2 ) ) in onosPorts:
onosPorts.remove( long( uint64( -2 ) ) )
if len( mnPorts ): # the ports of this switch don't match
switchResult = main.FALSE
main.log.warn( "Ports in MN but not ONOS: " + str( mnPorts ) )
if len( onosPorts ): # the ports of this switch don't match
switchResult = main.FALSE
main.log.warn(
"Ports in ONOS but not MN: " +
str( onosPorts ) )
if switchResult == main.FALSE:
main.log.error(
"The list of ports for switch %s(%s) does not match:" %
( name, mnSwitch[ 'dpid' ] ) )
main.log.warn( "mn_ports[] = " + str( mnPortsLog ) )
main.log.warn( "onos_ports[] = " + str( onosPortsLog ) )
portsResults = portsResults and switchResult
finalResults = finalResults and portsResults
return finalResults
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def compareLinks( self, switches, links, linksJson ):
"""
Compare mn and onos links
linksJson: parsed json object from the onos links api
"""
# FIXME: this does not look for extra links in ONOS, only checks that
# ONOS has what is in MN
try:
onos = linksJson
mnLinks = []
for l in links:
try:
node1 = switches[ l[ 'node1' ] ]
node2 = switches[ l[ 'node2' ] ]
enabled = True
for port in node1[ 'ports' ]:
if port[ 'of_port' ] == l[ 'port1' ]:
enabled = enabled and port[ 'enabled' ]
for port in node2[ 'ports' ]:
if port[ 'of_port' ] == l[ 'port2' ]:
enabled = enabled and port[ 'enabled' ]
if enabled:
mnLinks.append( l )
except KeyError:
pass
if 2 * len( mnLinks ) == len( onos ):
linkResults = main.TRUE
else:
linkResults = main.FALSE
main.log.error(
"Mininet has " + str( len( mnLinks ) ) +
" bidirectional links and ONOS has " +
str( len( onos ) ) + " unidirectional links" )
# iterate through MN links and check if an ONOS link exists in
# both directions
for link in mnLinks:
# TODO: Find a more efficient search method
node1 = None
port1 = None
node2 = None
port2 = None
firstDir = main.FALSE
secondDir = main.FALSE
for swName, switch in switches.iteritems():
if swName == link[ 'node1' ]:
node1 = switch[ 'dpid' ]
for port in switch[ 'ports' ]:
if str( port[ 'of_port' ] ) == str( link[ 'port1' ] ):
port1 = port[ 'of_port' ]
if node1 is not None and node2 is not None:
break
if swName == link[ 'node2' ]:
node2 = switch[ 'dpid' ]
for port in switch[ 'ports' ]:
if str( port[ 'of_port' ] ) == str( link[ 'port2' ] ):
port2 = port[ 'of_port' ]
if node1 is not None and node2 is not None:
break
for onosLink in onos:
onosNode1 = onosLink[ 'src' ][ 'device' ].replace(
":", '' ).replace( "of", '' )
onosNode2 = onosLink[ 'dst' ][ 'device' ].replace(
":", '' ).replace( "of", '' )
onosPort1 = onosLink[ 'src' ][ 'port' ]
onosPort2 = onosLink[ 'dst' ][ 'port' ]
# check onos link from node1 to node2
if str( onosNode1 ) == str( node1 ) and str(
onosNode2 ) == str( node2 ):
if int( onosPort1 ) == int( port1 ) and int(
onosPort2 ) == int( port2 ):
firstDir = main.TRUE
else:
# The right switches, but wrong ports, could be
# another link between these devices, or onos
# discovered the links incorrectly
main.log.warn(
'The port numbers do not match for ' +
str( link ) +
' between ONOS and MN. When checking ONOS for ' +
'link %s/%s -> %s/%s' %
( node1, port1, node2, port2 ) +
' ONOS has the values %s/%s -> %s/%s' %
( onosNode1, onosPort1, onosNode2, onosPort2 ) +
'. This could be another link between these devices' +
' or a incorrectly discoved link' )
# check onos link from node2 to node1
elif ( str( onosNode1 ) == str( node2 ) and
str( onosNode2 ) == str( node1 ) ):
if ( int( onosPort1 ) == int( port2 )
and int( onosPort2 ) == int( port1 ) ):
secondDir = main.TRUE
else:
# The right switches, but wrong ports, could be
# another link between these devices, or onos
# discovered the links incorrectly
main.log.warn(
'The port numbers do not match for ' +
str( link ) +
' between ONOS and MN. When checking ONOS for ' +
'link %s/%s -> %s/%s' %
( node1, port1, node2, port2 ) +
' ONOS has the values %s/%s -> %s/%s' %
( onosNode2, onosPort2, onosNode1, onosPort1 ) +
'. This could be another link between these devices' +
' or a incorrectly discoved link' )
else: # this is not the link you're looking for
pass
if not firstDir:
main.log.error(
'ONOS does not have the link %s/%s -> %s/%s' %
( node1, port1, node2, port2 ) )
if not secondDir:
main.log.error(
'ONOS does not have the link %s/%s -> %s/%s' %
( node2, port2, node1, port1 ) )
linkResults = linkResults and firstDir and secondDir
return linkResults
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def compareHosts( self, hosts, hostsJson ):
"""
Compare mn and onos Hosts.
Since Mininet hosts are quiet, ONOS will only know of them when they
speak. For this reason, we will only check that the hosts in ONOS
stores are in Mininet, and not vice versa.
Arguments:
hostsJson: parsed json object from the onos hosts api
Returns:
"""
import json
try:
hostResults = main.TRUE
for onosHost in hostsJson:
onosMAC = onosHost[ 'mac' ].lower()
match = False
for mnHost, info in hosts.iteritems():
for mnIntf in info[ 'interfaces' ]:
if onosMAC == mnIntf[ 'mac' ].lower():
match = True
for ip in mnIntf[ 'ips' ]:
if ip in onosHost[ 'ipAddresses' ]:
pass # all is well
else:
# misssing ip
main.log.error( "ONOS host " +
onosHost[ 'id' ] +
" has a different IP(" +
str( onosHost[ 'ipAddresses' ] ) +
") than the Mininet host(" +
str( ip ) +
")." )
output = json.dumps(
onosHost,
sort_keys=True,
indent=4,
separators=( ',', ': ' ) )
main.log.info( output )
hostResults = main.FALSE
if not match:
hostResults = main.FALSE
main.log.error( "ONOS host " + onosHost[ 'id' ] + " has no " +
"corresponding Mininet host." )
output = json.dumps( onosHost,
sort_keys=True,
indent=4,
separators=( ',', ': ' ) )
main.log.info( output )
return hostResults
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def verifyHostIp( self, hostList=[], prefix="", update=True ):
"""
Description:
Verify that all hosts have IP address assigned to them
Optional:
hostList: If specified, verifications only happen to the hosts
in hostList
prefix: at least one of the ip address assigned to the host
needs to have the specified prefix
update: Update Mininet information if True
Returns:
main.TRUE if all hosts have specific IP address assigned;
main.FALSE otherwise
"""
try:
hosts = self.getHosts( update=update, getInterfaces=False )
if not hostList:
hostList = hosts.keys()
for hostName in hosts.keys():
if hostName not in hostList:
continue
ipList = []
self.handle.sendline( str( hostName ) + " ip a" )
self.handle.expect( "mininet>" )
ipa = self.handle.before
ipv4Pattern = r'inet ((?:[0-9]{1,3}\.){3}[0-9]{1,3})/'
ipList += re.findall( ipv4Pattern, ipa )
# It's tricky to make regex for IPv6 addresses and this one is simplified
ipv6Pattern = r'inet6 ((?:[0-9a-fA-F]{1,4})?(?:[:0-9a-fA-F]{1,4}){1,7}(?:::)?(?:[:0-9a-fA-F]{1,4}){1,7})/'
ipList += re.findall( ipv6Pattern, ipa )
main.log.debug( self.name + ": IP list on host " + str( hostName ) + ": " + str( ipList ) )
if not ipList:
main.log.warn( self.name + ": Failed to discover any IP addresses on host " + str( hostName ) )
else:
if not any( ip.startswith( str( prefix ) ) for ip in ipList ):
main.log.warn( self.name + ": None of the IPs on host " + str( hostName ) + " has prefix " + str( prefix ) )
else:
main.log.debug( self.name + ": Found matching IP on host " + str( hostName ) )
hostList.remove( hostName )
return main.FALSE if hostList else main.TRUE
except KeyError:
main.log.exception( self.name + ": host data not as expected: " + hosts )
return None
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception" )
return None
def getHostsOld( self ):
"""
Returns a list of all hosts
Don't ask questions just use it"""
try:
self.handle.sendline( "" )
self.handle.expect( "mininet>" )
self.handle.sendline( "py [ host.name for host in net.hosts ]" )
self.handle.expect( "mininet>" )
handlePy = self.handle.before
handlePy = handlePy.split( "]\r\n", 1 )[ 1 ]
handlePy = handlePy.rstrip()
self.handle.sendline( "" )
self.handle.expect( "mininet>" )
hostStr = handlePy.replace( "]", "" )
hostStr = hostStr.replace( "'", "" )
hostStr = hostStr.replace( "[", "" )
hostStr = hostStr.replace( " ", "" )
hostList = hostStr.split( "," )
return hostList
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getSwitch( self ):
"""
Returns a list of all switches
Again, don't ask question just use it...
"""
try:
# get host list...
hostList = self.getHosts()
# Make host set
hostSet = set( hostList )
# Getting all the nodes in mininet
self.handle.sendline( "" )
self.handle.expect( "mininet>" )
self.handle.sendline( "py [ node.name for node in net.values() ]" )
self.handle.expect( "mininet>" )
handlePy = self.handle.before
handlePy = handlePy.split( "]\r\n", 1 )[ 1 ]
handlePy = handlePy.rstrip()
self.handle.sendline( "" )
self.handle.expect( "mininet>" )
nodesStr = handlePy.replace( "]", "" )
nodesStr = nodesStr.replace( "'", "" )
nodesStr = nodesStr.replace( "[", "" )
nodesStr = nodesStr.replace( " ", "" )
nodesList = nodesStr.split( "," )
nodesSet = set( nodesList )
# discarding default controller(s) node
nodesSet.discard( 'c0' )
nodesSet.discard( 'c1' )
nodesSet.discard( 'c2' )
switchSet = nodesSet - hostSet
switchList = list( switchSet )
return switchList
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def getGraphDict( self, timeout=60, useId=True, includeHost=False ):
"""
Return a dictionary which describes the latest Mininet topology data as a
graph.
An example of the dictionary:
{ vertex1: { 'edges': ..., 'name': ..., 'protocol': ... },
vertex2: { 'edges': ..., 'name': ..., 'protocol': ... } }
Each vertex should at least have an 'edges' attribute which describes the
adjacency information. The value of 'edges' attribute is also represented by
a dictionary, which maps each edge (identified by the neighbor vertex) to a
list of attributes.
An example of the edges dictionary:
'edges': { vertex2: { 'port': ..., 'weight': ... },
vertex3: { 'port': ..., 'weight': ... } }
If useId == True, dpid/mac will be used instead of names to identify
vertices, which is helpful when e.g. comparing Mininet topology with ONOS
topology.
If includeHost == True, all hosts (and host-switch links) will be included
in topology data.
Note that link or switch that are brought down by 'link x x down' or 'switch
x down' commands still show in the output of Mininet CLI commands such as
'links', 'dump', etc. Thus, to ensure the correctness of this function, it is
recommended to use delLink() or delSwitch functions to simulate link/switch
down, and addLink() or addSwitch to add them back.
"""
graphDict = {}
try:
links = self.getLinks( timeout=timeout )
portDict = {}
if useId:
switches = self.getSwitches()
if includeHost:
hosts = self.getHosts()
for link in links:
# FIXME: support 'includeHost' argument
if link[ 'node1' ].startswith( 'h' ) or link[ 'node2' ].startswith( 'h' ):
continue
nodeName1 = link[ 'node1' ]
nodeName2 = link[ 'node2' ]
port1 = link[ 'port1' ]
port2 = link[ 'port2' ]
# Loop for two nodes
for i in range( 2 ):
# Get port index from OVS
# The index extracted from port name may be inconsistent with ONOS
portIndex = -1
if nodeName1 not in portDict.keys():
portList = self.getOVSPorts( nodeName1 )
if len( portList ) == 0:
main.log.warn( self.name + ": No port found on switch " + nodeName1 )
return None
portDict[ nodeName1 ] = portList
for port in portDict[ nodeName1 ]:
if port[ 'port' ] == port1:
portIndex = port[ 'index' ]
break
if portIndex == -1:
main.log.warn( self.name + ": Cannot find port index for interface {}-eth{}".format( nodeName1, port1 ) )
return None
if useId:
node1 = 'of:' + str( switches[ nodeName1 ][ 'dpid' ] )
node2 = 'of:' + str( switches[ nodeName2 ][ 'dpid' ] )
else:
node1 = nodeName1
node2 = nodeName2
if node1 not in graphDict.keys():
if useId:
graphDict[ node1 ] = { 'edges': {},
'dpid': switches[ nodeName1 ][ 'dpid' ],
'name': nodeName1,
'ports': switches[ nodeName1 ][ 'ports' ],
'swClass': switches[ nodeName1 ][ 'swClass' ],
'pid': switches[ nodeName1 ][ 'pid' ],
'options': switches[ nodeName1 ][ 'options' ] }
else:
graphDict[ node1 ] = { 'edges': {} }
else:
# Assert node2 is not connected to any current links of node1
assert node2 not in graphDict[ node1 ][ 'edges' ].keys()
graphDict[ node1 ][ 'edges' ][ node2 ] = { 'port': portIndex }
# Swap two nodes/ports
nodeName1, nodeName2 = nodeName2, nodeName1
port1, port2 = port2, port1
return graphDict
except KeyError:
main.log.exception( self.name + ": KeyError exception found" )
return None
except AssertionError:
main.log.exception( self.name + ": AssertionError exception found" )
return None
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception" )
return None
def update( self, timeout=1000 ):
"""
updates the port address and status information for
each port in mn"""
# TODO: Add error checking. currently the mininet command has no output
main.log.info( "Updating MN port information" )
try:
self.handle.sendline( "" )
self.handle.expect( "mininet>" )
self.handle.sendline( "update" )
self.handle.expect( "mininet>", timeout )
self.handle.sendline( "" )
self.handle.expect( "mininet>" )
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def assignVLAN( self, host, intf, vlan ):
"""
Add vlan tag to a host.
Dependencies:
This class depends on the "vlan" package
$ sudo apt-get install vlan
Configuration:
Load the 8021q module into the kernel
$sudo modprobe 8021q
To make this setup permanent:
$ sudo su -c 'echo "8021q" >> /etc/modules'
"""
if self.handle:
try:
# get the ip address of the host
main.log.info( "Get the ip address of the host" )
ipaddr = self.getIPAddress( host )
print repr( ipaddr )
# remove IP from interface intf
# Ex: h1 ifconfig h1-eth0 inet 0
main.log.info( "Remove IP from interface " )
cmd2 = host + " ifconfig " + intf + " " + " inet 0 "
self.handle.sendline( cmd2 )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "====> %s ", response )
# create VLAN interface
# Ex: h1 vconfig add h1-eth0 100
main.log.info( "Create Vlan" )
cmd3 = host + " vconfig add " + intf + " " + vlan
self.handle.sendline( cmd3 )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "====> %s ", response )
# assign the host's IP to the VLAN interface
# Ex: h1 ifconfig h1-eth0.100 inet 10.0.0.1
main.log.info( "Assign the host IP to the vlan interface" )
vintf = intf + "." + vlan
cmd4 = host + " ifconfig " + vintf + " " + " inet " + ipaddr
self.handle.sendline( cmd4 )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "====> %s ", response )
# update Mininet node variables
main.log.info( "Update Mininet node variables" )
cmd5 = "px %s.defaultIntf().name='%s'" % ( host, vintf )
self.handle.sendline( cmd5 )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "====> %s ", response )
cmd6 = "px %s.nameToIntf['%s']=%s.defaultIntf()" % ( host, vintf, host )
self.handle.sendline( cmd6 )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "====> %s ", response )
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
return main.FALSE
def removeVLAN( self, host, intf ):
"""
Remove vlan tag from a host.
Dependencies:
This class depends on the "vlan" package
$ sudo apt-get install vlan
Configuration:
Load the 8021q module into the kernel
$sudo modprobe 8021q
To make this setup permanent:
$ sudo su -c 'echo "8021q" >> /etc/modules'
"""
if self.handle:
try:
# get the ip address of the host
main.log.info( "Get the ip address of the host" )
ipaddr = self.getIPAddress( host )
# remove VLAN interface
# Ex: h1 vconfig rem h1-eth0.100
main.log.info( "Remove Vlan interface" )
cmd2 = host + " vconfig rem " + intf
self.handle.sendline( cmd2 )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "====> %s ", response )
# assign the host's IP to the original interface
# Ex: h1 ifconfig h1-eth0 inet 10.0.0.1
main.log.info( "Assign the host IP to the original interface" )
original_intf = intf.split(".")[0]
cmd3 = host + " ifconfig " + original_intf + " " + " inet " + ipaddr
self.handle.sendline( cmd3 )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "====> %s ", response )
# update Mininet node variables
cmd4 = "px %s.defaultIntf().name='%s'" % ( host, original_intf )
self.handle.sendline( cmd4 )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "====> %s ", response )
cmd5 = "px %s.nameToIntf['%s']=%s.defaultIntf()" % ( host, original_intf, host )
self.handle.sendline( cmd5 )
self.handle.expect( "mininet>" )
response = self.handle.before
main.log.info( "====> %s ", response )
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
return main.FALSE
def createHostComponent( self, name ):
"""
Creates a new mininet cli component with the same parameters as self.
This new component is intended to be used to login to the hosts created
by mininet.
Arguments:
name - The string of the name of this component. The new component
will be assigned to main.<name> .
In addition, main.<name>.name = str( name )
"""
try:
# look to see if this component already exists
getattr( main, name )
except AttributeError:
# namespace is clear, creating component
main.componentDictionary[ name ] = main.componentDictionary[ self.name ].copy()
main.componentDictionary[ name ][ 'connect_order' ] = str( int( main.componentDictionary[ name ][ 'connect_order' ] ) + 1 )
main.componentInit( name )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
else:
# namespace is not clear!
main.log.error( name + " component already exists!" )
# FIXME: Should we exit here?
main.cleanAndExit()
def removeHostComponent( self, name ):
"""
Remove host component
Arguments:
name - The string of the name of the component to delete.
"""
try:
# Get host component
component = getattr( main, name )
except AttributeError:
main.log.error( "Component " + name + " does not exist." )
return
try:
# Disconnect from component
component.disconnect()
# Delete component
delattr( main, name )
# Delete component from ComponentDictionary
del( main.componentDictionary[ name ] )
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def startHostCli( self, host=None ):
"""
Use the mininet m utility to connect to the host's cli
"""
# These are fields that can be used by scapy packets. Initialized to None
self.hostIp = None
self.hostMac = None
try:
if not host:
host = self.name
self.handle.sendline( self.home + "/util/m " + host )
self.handle.sendline( "cd" )
self.handle.expect( self.hostPrompt )
self.handle.sendline( "" )
self.handle.expect( self.hostPrompt )
return main.TRUE
except pexpect.TIMEOUT:
main.log.exception( self.name + ": Command timed out" )
return main.FALSE
except pexpect.EOF:
main.log.exception( self.name + ": connection closed." )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
def changeInterfaceStatus( self, devicename, intf, status ):
'''
Args:
devicename: switch name
intf: port name on switch
status: up or down
Returns: boolean to show success change status
'''
if status == "down" or status == "up":
try:
cmd = devicename + " ifconfig " + intf + " " + status
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
return main.TRUE
except pexpect.TIMEOUT:
main.log.exception( self.name + ": Command timed out" )
return main.FALSE
except pexpect.EOF:
main.log.exception( self.name + ": connection closed." )
main.cleanAndExit()
except TypeError:
main.log.exception( self.name + ": TypeError" )
main.cleanAndExit()
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
main.cleanAndExit()
else:
main.log.warn( "Interface status should be up or down!" )
return main.FALSE
def moveDualHomedHost( self, host, oldSw, oldPairSw, newSw, newPairSw,
macAddr=None, prefixLen=None, bondedName='bond1' ):
"""
Moves a dual-homed host from one switch-pair to another pair on the fly
If macAddr is specified, change MAC address of the bonded host interface
to specified MAC address.
Assumes that the host has two interfaces (eth0 and eth1) originally.
"""
bond1 = "%s-%s" % ( host, bondedName )
newIntf = host + '-eth2'
newIntfPair = host + '-eth3'
commands = [
# Bring link between oldSw-host down
"py net.configLinkStatus('" + oldSw + "'," + "'" + host + "'," + "'down')",
# Bring link between oldPairSw-host down
"py net.configLinkStatus('" + oldPairSw + "'," + "'" + host + "'," + "'down')",
# Determine hostintf and Oldswitchintf
"px hintf,sintf = " + host + ".connectionsTo(" + oldSw + ")[0]",
# Determine ip and mac address of the host-oldSw interface
"px ipaddr = hintf.IP()",
"px macaddr = hintf.MAC()" if macAddr is None else 'px macaddr = "%s"' % macAddr,
# Detach interface between oldSw-host
"px " + oldSw + ".detach( sintf )",
# Determine hostintf and Oldpairswitchintf
"px sintfpair,hintfpair = " + oldPairSw + ".connectionsTo(" + host + ")[0]",
# Detach interface between oldPairSw-host
"px " + oldPairSw + ".detach( sintfpair )",
# Add link between host-newSw
"py net.addLink(" + host + "," + newSw + ", 2)",
# Add link between host-newPairSw
"py net.addLink(" + host + "," + newPairSw + ")",
# Determine hostintf and Newswitchintf
"px hintf,sintf = " + host + ".connectionsTo(" + newSw + ")[-1]",
# Determine hostintf and NewPairswitchintf
"px hintfpair,sintfpair = " + host + ".connectionsTo(" + newPairSw + ")[-1]",
# Attach interface between newSw-host
"px " + newSw + ".attach( sintf )",
# Attach interface between newPairSw-host
"px " + newPairSw + ".attach( sintfpair )",
# Bond two interfaces
host + ' ip link add %s type bond' % bond1,
host + ' ip link set %s down' % newIntf,
host + ' ip link set %s down' % newIntfPair,
host + ' ip link set %s master %s' % ( newIntf, bond1 ),
host + ' ip link set %s master %s' % ( newIntfPair, bond1 ),
host + ' ip addr flush dev %s' % newIntf,
host + ' ip addr flush dev %s' % newIntfPair,
host + ' ip link set %s up' % bond1,
"px lowestIntf = min( [ hintf, hintfpair ] )",
"px highestIntf = max( [ hintf, hintfpair ] )",
"px lowestIntf.name = '" + bond1 + "'",
"px " + host + ".nameToIntf['" + bond1 + "'] = lowestIntf",
"px del " + host + ".intfs[ " + host + ".ports[ highestIntf ] ]",
"px del " + host + ".ports[ highestIntf ]",
# Set ipaddress of the host-newSw interface
"px " + host + ".setIP( ip = ipaddr, intf = lowestIntf " +
( ", prefixLen = %s )" % str( prefixLen ) if prefixLen is not None else " )" ),
# Set macaddress of the host-newSw interface
"px " + host + ".setMAC( mac = macaddr, intf = lowestIntf)",
"net",
# Determine ipaddress of the bonded host interface
host + " ifconfig",
]
if self.handle:
try:
for cmd in commands:
print "cmd= ", cmd
self.handle.sendline( cmd )
self.handle.expect( "mininet>" )
main.log.info( "====> %s ", self.handle.before )
return main.TRUE
except pexpect.TIMEOUT:
main.log.error( self.name + ": TIMEOUT exception found" )
main.log.error( self.name + ": " + self.handle.before )
main.cleanAndExit()
except pexpect.EOF:
main.log.error( self.name + ": EOF exception found" )
main.log.error( self.name + ": " + self.handle.before )
return main.FALSE
except Exception:
main.log.exception( self.name + ": Uncaught exception!" )
return main.FALSE
if __name__ != "__main__":
sys.modules[ __name__ ] = MininetCliDriver()