hadoop/hadoop-common-project/hadoop-common/src/main/proto/IpcConnectionContext.proto

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
option java_package = "org.apache.hadoop.ipc.protobuf";
option java_outer_classname = "IpcConnectionContextProtos";
option java_generate_equals_and_hash = true;

/**
 * Spec for UserInformationProto is specified in ProtoUtil#makeIpcConnectionContext
 */
message UserInformationProto {
  optional string effectiveUser = 1;
  optional string realUser = 2;
}

/**
 * The connection context is sent as part of the connection establishment.
 * It establishes the context for ALL Rpc calls within the connection.
 */
message IpcConnectionContextProto {
  // UserInfo beyond what is determined as part of security handshake 
  // at connection time (kerberos, tokens etc).
  optional UserInformationProto userInfo = 2;

  // Protocol name for next rpc layer.
  // The client created a proxy with this protocol name
  optional string protocol = 3;
}