/*
 * 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.
 *
 */

syntax = "proto3";

package skywalking.v3;

option java_multiple_files = true;
option java_package = "org.apache.skywalking.apm.network.servicemesh.v3";
option csharp_namespace = "SkyWalking.NetworkProtocol.V3";
option go_package = "skywalking.apache.org/repo/goapi/collect/servicemesh/v3";

import "common/Common.proto";

// Define metrics report service. The metrics format is typically representing the data model collected in the service mesh case.
service ServiceMeshMetricService {
    rpc collect(stream ServiceMeshMetric) returns (MeshProbeDownstream) {
    }
}

message ServiceMeshMetric {
    // Start timestamp in milliseconds of this RPC,
    // measured between the current time and midnight, January 1, 1970 UTC.
    int64 startTime = 1;
    // End timestamp in milliseconds of this RPC,
    // measured between the current time and midnight, January 1, 1970 UTC.
    int64 endTime = 2;
    string sourceServiceName = 3;
    string sourceServiceInstance = 4;
    string destServiceName = 5;
    string destServiceInstance = 6;
    string endpoint = 7;
    int32 latency = 8;
    int32 responseCode = 9;
    // Status represents the response status of this calling.
    bool status = 10;
    Protocol protocol = 11;
    DetectPoint detectPoint = 12;
    // NONE, mTLS, or TLS
    string tlsMode = 13;
    // The sidecar/proxy internal error code, the value bases on the implementation.
    // The envoy internal error codes are listed here, https://www.envoyproxy.io/docs/envoy/latest/api-v2/data/accesslog/v2/accesslog.proto#data-accesslog-v2-responseflags
    string internalErrorCode = 14;

    // The tcp detail of the mesh metrics if it's a TCP metrics, otherwise should be empty.
    TCPInfo tcp = 15;

    // Internal request(response) latency is the time cost inside the Envoy sidecar proxy.
    // For more details, check https://www.envoyproxy.io/docs/envoy/v1.22.0/api-v3/data/accesslog/v3/accesslog.proto.html#data-accesslog-v3-accesslogcommon.
    // internalRequestLatencyNanos is the interval between the first downstream byte received and the first upstream byte sent
    int64 internalRequestLatencyNanos = 16;
    // internalResponseLatencyNanos = time_to_first_downstream_tx_byte - time_to_first_upstream_rx_byte;
    // | ... request workflow  ... | upstream | ----- response -----> |                proxy                | ------- response -------> | client  |
    // |                 time_to_first_upstream_rx_byte               |
    // |                                  time_to_last_downstream_tx_byte                                                               |
    //                                                                |              internalResponseLatencyNanos                       |
    int64 internalResponseLatencyNanos = 17;

    repeated KeyStringValuePair sourceInstanceProperties = 18;
    repeated KeyStringValuePair destInstanceProperties = 19;
}

enum Protocol {
    HTTP = 0;
    gRPC = 1;
    TCP = 2;
}

message TCPInfo {
    // The received data in bytes
    int64 receivedBytes = 1;
    // The sent data in bytes
    int64 sentBytes = 2;
}

message MeshProbeDownstream {
}