Make ponsim_olt work for asfvolt16_olt adapter.

This is the first commit where olt activate is tested.

Change-Id: Ifa3967d8650741db8feeeff1a271618408ea4da1
diff --git a/ponsim/ponsim_servicer.py b/ponsim/ponsim_servicer.py
new file mode 100644
index 0000000..b7a524f
--- /dev/null
+++ b/ponsim/ponsim_servicer.py
@@ -0,0 +1,71 @@
+#
+# Copyright 2017 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 structlog
+from common.utils.grpc_utils import twisted_async
+from voltha.protos import third_party
+from voltha.protos.ponsim_pb2 import PonSimServicer, PonSimDeviceInfo
+from google.protobuf.empty_pb2 import Empty
+from voltha.protos.ponsim_pb2 import XPonSimServicer
+
+_ = 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()
+
+    def GetStats(self, request, context):
+        return self.ponsim.get_stats()
+
+class XPonHandler(XPonSimServicer):
+
+    def __init__(self, thread_pool, x_pon_sim):
+        self.thread_pool = thread_pool
+        self.x_pon_sim = x_pon_sim
+
+    def CreateInterface(self, request, context):
+        self.x_pon_sim.CreateInterface(request)
+        return Empty()
+
+    def UpdateInterface(self, request, context):
+        self.x_pon_sim.UpdateInterface(request)
+        return Empty()
+
+    def RemoveInterface(self, request, context):
+        self.x_pon_sim.RemoveInterface(request)
+        return Empty()