PONSIM: PON simulator with real dataplane handling
This was needed because neither CPQD nor OVS can handle
both zero-tagged packets and 802.1ad (QinQ).
- extensive unittest proves ponsim functional correctness
(for the common use-cases needed in the PON scenario)
- integrated with frameio and coupled with a rather
simple gRPC NBI, ponsim can be operated from Voltha
just like a real PON system
- posim_olt/_onu adapters added to Voltha to work on
ponsim
- CLI can be used to preprovision and activate a PONSIM
instance (e.g., preprovision_olt -t ponsim_olt -H localhost:50060)
- Some of olt-oftest:olt-complex testcases can be run on
the ponsim device (in vagrant/Ubuntu environment),
but there are some remaining issues to work out:
- barrier calls in OF do not guaranty that the flow
is already installed on the device. This is a generic
issue, not just for ponsim.
- the whole test framework is inconsistent about zero-
tagged vs. untagged frames at the ONUs, while ponsim
is rather pedantica and does exactly what was defined
in the flows.
Change-Id: I0dd564c932416ae1566935492134cb5b08113bdc
diff --git a/ponsim/grpc_server.py b/ponsim/grpc_server.py
new file mode 100644
index 0000000..20b5dab
--- /dev/null
+++ b/ponsim/grpc_server.py
@@ -0,0 +1,75 @@
+#
+# Copyright 2016 the original author or authors.
+#
+# 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.
+#
+import grpc
+import structlog
+from concurrent import futures
+
+from common.utils.grpc_utils import twisted_async
+from voltha.protos import third_party
+from voltha.protos.ponsim_pb2 import PonSimServicer, \
+ add_PonSimServicer_to_server, PonSimDeviceInfo
+from google.protobuf.empty_pb2 import Empty
+
+_ = third_party
+
+log = structlog.get_logger()
+
+
+class FlowUpdateHandler(PonSimServicer):
+
+ def __init__(self, thread_pool, ponsim):
+ self.thread_pool = thread_pool
+ self.ponsim = ponsim
+
+ @twisted_async
+ def GetDeviceInfo(self, request, context):
+ log.info('get-device-info')
+ ports = self.ponsim.get_ports()
+ return PonSimDeviceInfo(
+ nni_port=ports[0],
+ uni_ports=ports[1:]
+ )
+
+ @twisted_async
+ def UpdateFlowTable(self, request, context):
+ log.info('flow-table-update', request=request, port=request.port)
+ if request.port == 0:
+ # by convention this is the olt port
+ self.ponsim.olt_install_flows(request.flows)
+ else:
+ self.ponsim.onu_install_flows(request.port, request.flows)
+ return Empty()
+
+class GrpcServer(object):
+
+ def __init__(self, port, ponsim):
+ self.port = port
+ self.thread_pool = futures.ThreadPoolExecutor(max_workers=10)
+ self.server = grpc.server(self.thread_pool)
+ self.ponsim = ponsim
+
+ def start(self):
+ log.debug('starting')
+ handler = FlowUpdateHandler(self.thread_pool, self.ponsim)
+ add_PonSimServicer_to_server(handler, self.server)
+ self.server.add_insecure_port('[::]:%s' % self.port)
+ self.server.start()
+ log.info('started')
+
+ def stop(self, grace=0):
+ log.debug('stopping')
+ self.server.stop(grace)
+ log.info('stopped')