From 1bb4412ff345a8c3583bbf881ae3be6679a44a3e Mon Sep 17 00:00:00 2001
From: Brandon Heller <brandonh@stanford.edu>
Date: Sat, 2 Jan 2010 08:51:24 -0800
Subject: [PATCH] Separate kernel and user switches into separate objects
---
bin/mn_run.py | 4 +-
mininet/net.py | 14 ++--
mininet/node.py | 145 ++++++++++++++++++--------------------
mininet/test/test_nets.py | 22 +++---
4 files changed, 90 insertions(+), 95 deletions(-)
diff --git a/bin/mn_run.py b/bin/mn_run.py
index 0aa72482..2c566c48 100755
--- a/bin/mn_run.py
+++ b/bin/mn_run.py
@@ -11,7 +11,7 @@
from mininet.logging_mod import lg, set_loglevel, LEVELS
from mininet.net import Mininet, init
-from mininet.node import Switch, Host, Controller, ControllerParams, NOX
+from mininet.node import KernelSwitch, Host, Controller, ControllerParams, NOX
from mininet.topo import TreeTopo
# built in topologies, created only when run
@@ -24,7 +24,7 @@
'fattree6' : (lambda: FatTreeTopo(k = 6))}
SWITCH_DEF = 'kernel'
-SWITCHES = {'kernel' : Switch}
+SWITCHES = {'kernel' : KernelSwitch}
HOST_DEF = 'process'
HOSTS = {'process' : Host}
diff --git a/mininet/net.py b/mininet/net.py
index 063ca23f..0a72349d 100755
--- a/mininet/net.py
+++ b/mininet/net.py
@@ -377,14 +377,20 @@ def ping(self, hosts = None):
return ploss
def ping_all(self):
- '''Ping between all hosts.'''
- self.ping()
+ '''Ping between all hosts.
+
+ @return ploss packet loss percentage
+ '''
+ return self.ping()
def ping_pair(self):
- '''Ping between first two hosts, useful for testing.'''
+ '''Ping between first two hosts, useful for testing.
+
+ @return ploss packet loss percentage
+ '''
hosts_sorted = sorted(self.topo.hosts())
hosts = [hosts_sorted[0], hosts_sorted[1]]
- self.ping(hosts = hosts)
+ return self.ping(hosts = hosts)
@staticmethod
def _parseIperf(iperfOutput):
diff --git a/mininet/node.py b/mininet/node.py
index 023d01c3..dab98ddd 100644
--- a/mininet/node.py
+++ b/mininet/node.py
@@ -211,49 +211,38 @@ class Host(Node):
pass
-class Controller(Node):
- '''A Controller is a Node that is running (or has execed) an
- OpenFlow controller.'''
-
- def __init__(self, name, inNamespace = False, controller = 'controller',
- cargs = '-v ptcp:', cdir = None):
- self.controller = controller
- self.cargs = cargs
- self.cdir = cdir
- Node.__init__(self, name, inNamespace = inNamespace)
+class Switch(Node):
+ '''A Switch is a Node that is running (or has execed)
+ an OpenFlow switch.'''
- def start(self):
- '''Start <controller> <args> on controller.
+ def sendCmd(self, cmd):
+ '''Send command to Node.
- Log to /tmp/cN.log
+ @param cmd string
'''
- cout = '/tmp/' + self.name + '.log'
- if self.cdir is not None:
- self.cmdPrint('cd ' + self.cdir)
- self.cmdPrint(self.controller + ' ' + self.cargs +
- ' 1> ' + cout + ' 2> ' + cout + ' &')
- self.execed = False # XXX Until I fix it
-
- def stop(self):
- '''Stop controller.'''
- self.cmd('kill %' + self.controller)
- self.terminate()
+ if not self.execed:
+ return Node.sendCmd(self, cmd)
+ else:
+ lg.error('*** Error: %s has execed and cannot accept commands' %
+ self.name)
+ def monitor(self):
+ '''Monitor node.'''
+ if not self.execed:
+ return Node.monitor(self)
+ else:
+ return True, ''
-class Switch(Node):
- '''A Switch is a Node that is running (or has execed)
- an OpenFlow switch.'''
+class UserSwitch(Switch):
- def __init__(self, name, datapath = None):
+ def __init__(self, name):
'''Init.
@param name
- @param datapath string, datapath name
'''
- self.dp = datapath
- Node.__init__(self, name, inNamespace = (datapath == None))
+ Node.__init__(self, name, inNamespace = True)
- def _startUserDatapath(self, controllers):
+ def start(self, controllers):
'''Start OpenFlow reference user datapath.
Log to /tmp/sN-{ofd,ofp}.log.
@@ -273,12 +262,24 @@ def _startUserDatapath(self, controllers):
' tcp:localhost --fail=closed 1> ' + ofplog + ' 2>' +
ofplog + ' &')
- def _stopUserDatapath(self):
+ def stop(self):
'''Stop OpenFlow reference user datapath.'''
self.cmd('kill %ofdatapath')
self.cmd('kill %ofprotocol')
- def _startKernelDatapath(self):
+
+class KernelSwitch(Switch):
+
+ def __init__(self, name, datapath = None):
+ '''Init.
+
+ @param name
+ @param datapath string, datapath name
+ '''
+ self.dp = datapath
+ Node.__init__(self, name, inNamespace = (datapath == None))
+
+ def start(self, ignore):
'''Start up reference kernel datapath.'''
ofplog = '/tmp/' + self.name + '-ofp.log'
quietRun('ifconfig lo up')
@@ -293,7 +294,7 @@ def _startKernelDatapath(self):
' --fail=closed 1> ' + ofplog + ' 2>' + ofplog + ' &')
self.execed = False # XXX until I fix it
- def _stopKernelDatapath(self):
+ def stop(self):
'''Terminate reference kernel datapath.'''
quietRun('dpctl deldp ' + self.dp)
# In theory the interfaces should go away after we shut down.
@@ -305,40 +306,46 @@ def _stopKernelDatapath(self):
quietRun('ip link del ' + intf)
lg.info('.')
- def start(self, controllers):
- '''Start datapath.
- @param controllers dict of controller names to objects
+class Controller(Node):
+ '''A Controller is a Node that is running (or has execed) an
+ OpenFlow controller.'''
+
+ def __init__(self, name, inNamespace = False, controller = 'controller',
+ cargs = '-v ptcp:', cdir = None):
+ self.controller = controller
+ self.cargs = cargs
+ self.cdir = cdir
+ Node.__init__(self, name, inNamespace = inNamespace)
+
+ def start(self):
+ '''Start <controller> <args> on controller.
+
+ Log to /tmp/cN.log
'''
- if self.dp is None:
- self._startUserDatapath(controllers)
- else:
- self._startKernelDatapath()
+ cout = '/tmp/' + self.name + '.log'
+ if self.cdir is not None:
+ self.cmdPrint('cd ' + self.cdir)
+ self.cmdPrint(self.controller + ' ' + self.cargs +
+ ' 1> ' + cout + ' 2> ' + cout + ' &')
+ self.execed = False # XXX Until I fix it
def stop(self):
- '''Stop datapath.'''
- if self.dp is None:
- self._stopUserDatapath()
- else:
- self._stopKernelDatapath()
+ '''Stop controller.'''
+ self.cmd('kill %' + self.controller)
+ self.terminate()
- def sendCmd(self, cmd):
- '''Send command to Node.
- @param cmd string
- '''
- if not self.execed:
- return Node.sendCmd(self, cmd)
- else:
- lg.error('*** Error: %s has execed and cannot accept commands' %
- self.name)
+class ControllerParams(object):
+ '''Container for controller IP parameters.'''
+ def __init__(self, ip, subnet_size):
+ '''Init.
- def monitor(self):
- '''Monitor node.'''
- if not self.execed:
- return Node.monitor(self)
- else:
- return True, ''
+ @param ip integer, controller IP
+ @param subnet_size integer, ex 8 for slash-8, covering 17M
+ '''
+ self.ip = ip
+ self.subnet_size = subnet_size
class NOX(Controller):
@@ -360,16 +367,4 @@ def __init__(self, name, inNamespace = False, nox_args = None, **kwargs):
controller = nox_core_dir + '/nox_core',
cargs = '--libdir=/usr/local/lib -v -i ptcp: ' + \
' '.join(nox_args),
- cdir = nox_core_dir, **kwargs)
-
-
-class ControllerParams(object):
- '''Container for controller IP parameters.'''
- def __init__(self, ip, subnet_size):
- '''Init.
-
- @param ip integer, controller IP
- @param subnet_size integer, ex 8 for slash-8, covering 17M
- '''
- self.ip = ip
- self.subnet_size = subnet_size
\ No newline at end of file
+ cdir = nox_core_dir, **kwargs)
\ No newline at end of file
diff --git a/mininet/test/test_nets.py b/mininet/test/test_nets.py
index ed6570df..2c65fd19 100755
--- a/mininet/test/test_nets.py
+++ b/mininet/test/test_nets.py
@@ -8,12 +8,12 @@
import unittest
from mininet.net import init, Mininet #, DATAPATHS
-from mininet.node import Switch, Host, NOXController, ControllerParams
+from mininet.node import KernelSwitch, Host, ControllerParams
from mininet.node import Controller
from mininet.topo import TreeTopo
# temporary, until user-space side is tested
-DATAPATHS = ['kernel']
+SWITCHES = {'kernel' : KernelSwitch}
class testMinimal(unittest.TestCase):
'''For each datapath type, test ping with a minimal topology.
@@ -24,15 +24,12 @@ class testMinimal(unittest.TestCase):
def testMinimal(self):
'''Ping test with both datapaths on minimal topology'''
init()
- for datapath in DATAPATHS:
- k = datapath == 'kernel'
+ for switch in SWITCHES.values():
controller_params = ControllerParams(0x0a000000, 8) # 10.0.0.0/8
- mn = Mininet(TreeTopo(), Switch, Host, Controller,
+ mn = Mininet(TreeTopo(), switch, Host, Controller,
controller_params)
- mn.start()
- dropped = mn.ping_test()
+ dropped = mn.run('ping')
self.assertEqual(dropped, 0)
- mn.stop()
class testTree(unittest.TestCase):
@@ -41,16 +38,13 @@ class testTree(unittest.TestCase):
def testTree16(self):
'''Ping test with both datapaths on 16-host topology'''
init()
- for datapath in DATAPATHS:
- k = datapath == 'kernel'
+ for switch in SWITCHES.values():
controller_params = ControllerParams(0x0a000000, 8) # 10.0.0.0/8
tree_topo = TreeTopo(depth = 3, fanout = 4)
- mn = Mininet(tree_topo, Switch, Host, Controller,
+ mn = Mininet(tree_topo, switch, Host, Controller,
controller_params)
- mn.start()
- dropped = mn.ping_test()
+ dropped = mn.run('ping')
self.assertEqual(dropped, 0)
- mn.stop()
#class testLinear(unittest.TestCase):
# '''For each datapath type, test all-pairs ping with LinearNet.'''
--
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