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Diffstat (limited to 'tools/pkt_fwd/pkt_fwd.py')
-rw-r--r-- | tools/pkt_fwd/pkt_fwd.py | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/tools/pkt_fwd/pkt_fwd.py b/tools/pkt_fwd/pkt_fwd.py new file mode 100644 index 00000000..2580ee1f --- /dev/null +++ b/tools/pkt_fwd/pkt_fwd.py @@ -0,0 +1,53 @@ +# Copyright 2016 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. +"""Abstract "packet forwarding" model. + +This is an abstract class for packet forwarders. +""" + +class IPktFwd(object): + """Interface class that is implemented by specific classes + of packet forwarders + """ + + def __enter__(self): + """Start the packet forwarder. + + Provide a context manager interface to the packet forwarders. + This simply calls the :func:`start` function. + """ + return self.start() + + def __exit__(self, type_, value, traceback): + """Stop the packet forwarder. + + Provide a context manager interface to the packet forwarders. + This simply calls the :func:`stop` function. + """ + self.stop() + + def start(self): + """Start the packet forwarder. + + :returns: None + """ + raise NotImplementedError('Please call an implementation.') + + def stop(self): + """Stop the packet forwarder. + + :returns: None + """ + raise NotImplementedError('Please call an implementation.') + |