[SEBA-823] REST APIs initial implementation (legacy+new)

Change-Id: Ia8480b72540ff08d35003534d39aff984e31120c
diff --git a/api/bbsim/bbsim.yaml b/api/bbsim/bbsim.yaml
new file mode 100644
index 0000000..484ad3c
--- /dev/null
+++ b/api/bbsim/bbsim.yaml
@@ -0,0 +1,30 @@
+# Copyright 2018-present Open Networking Foundation
+#
+# 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.
+
+type: google.api.Service
+config_version: 3
+
+http:
+  rules:
+  - selector: bbsim.BBSim.Version
+    get: "/v1/version"
+  - selector: bbsim.BBSim.GetOlt
+    get: "/v1/olt"
+    additional_bindings:
+      - get: "/v1/olt/status"
+  - selector: bbsim.BBSim.GetONUs
+    get: "/v1/olt/onus"
+  - selector: bbsim.BBSim.GetONU
+    get: "/v1/olt/onus/{SerialNumber}"
+