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+# Copyright 2015 Intel Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Generic interface VSPERF uses for controlling a vSwitch
+"""
+
+class IVSwitch(object):
+ """Interface class that is implemented by vSwitch-specific classes
+
+ Other methods are called only between start() and stop()
+ """
+ def start(self):
+ """Start the vSwitch
+
+ If vSwitch is split to multiple processes, has kernel modules etc.,
+ this is expected to set them all up in correct sequence
+ """
+ raise NotImplementedError()
+
+ def stop(self):
+ """Stop the vSwitch
+
+ If vSwitch is split to multiple processes, has kernel modules etc.,
+ this is expected to terminate and clean all of them in correct sequence
+ """
+ raise NotImplementedError()
+
+ def add_switch(self, switch_name):
+ """Create a new logical switch with no ports
+
+ :param switch_name: The name of the new logical switch
+ :returns: None
+ """
+ raise NotImplementedError()
+
+ def del_switch(self, switch_name):
+ """Destroy the given logical switch
+
+ :param switch_name: The name of the logical switch to be destroyed
+ :returns: None
+ """
+ raise NotImplementedError()
+
+ def add_phy_port(self, switch_name):
+ """Create a new port to the logical switch that is attached to a
+ physical port
+
+ :param switch_name: The switch where the port is attached to
+ :returns: (port name, OpenFlow port number)
+ """
+ raise NotImplementedError()
+
+ def add_vport(self, switch_name):
+ """Create a new port to the logical switch for VM connections
+
+ :param switch_name: The switch where the port is attached to
+ :returns: (port name, OpenFlow port number)
+ """
+ raise NotImplementedError()
+
+ def get_ports(self, switch_name):
+ """Return a list of tuples describing the ports of the logical switch
+
+ :param switch_name: The switch whose ports to return
+ :returns: [(port name, OpenFlow port number), ...]
+ """
+ raise NotImplementedError()
+
+ def del_port(self, switch_name, port_name):
+ """Delete the port from the logical switch
+
+ The port can be either physical or virtual
+
+ :param switch_name: The switch on which to operate
+ :param port_name: The port to delete
+ """
+ raise NotImplementedError()
+
+ def add_flow(self, switch_name, flow):
+ """Add a flow rule to the logical switch
+
+ :param switch_name: The switch on which to operate
+ :param flow: Flow description as a dictionary
+
+ Example flow dictionary:
+ flow = {
+ 'in_port': '1',
+ 'idle_timeout': '0',
+ 'actions': ['output:3']
+ }
+ """
+ raise NotImplementedError()
+
+ def del_flow(self, switch_name, flow=None):
+ """Delete the flow rule from the logical switch
+
+ :param switch_name: The switch on which to operate
+ :param flow: Flow description as a dictionary
+
+ For flow dictionary description, see add_flow
+ For flow==None, all flows are deleted
+ """
+ raise NotImplementedError()