add protobuf

proto/message.proto

@@ -0,0 +1,46 @@
+syntax = "proto3";
+
+message AuthRequest {
+  bytes uuid = 1;
+  bytes username = 2;
+  bytes salt = 3;
+  bytes token = 4;
+  int32 timestamp = 5;
+}
+
+message AuthReply {
+  int32 code = 1;
+  bytes payload = 2;
+}
+
+message Pub {
+  bytes topic = 1;
+  int32 qos = 2;
+  bytes content = 3;
+}
+
+message Command {
+  int32 command_type = 1;
+  bytes command = 2;
+}
+
+message JsonRpcRequest {
+  bytes method = 1;
+  bytes params = 2;
+}
+
+message JsonRpcReply {
+  bytes result = 1;
+  bytes error = 2;
+}
+
+message Data {
+  bytes route_key = 1;
+  bytes metric = 2;
+}
+
+message TaskEventStream {
+  int32 task_id = 1;
+  bytes type = 2;
+  bytes stream = 3;
+}