syntax = "proto3";

package xray.transport.internet.kcp;
option csharp_namespace = "Xray.Transport.Internet.Kcp";
option go_package = "github.com/xtls/xray-core/transport/internet/kcp";
option java_package = "com.xray.transport.internet.kcp";
option java_multiple_files = true;

import "common/serial/typed_message.proto";

// Maximum Transmission Unit, in bytes.
message MTU {
  uint32 value = 1;
}

// Transmission Time Interview, in milli-sec.
message TTI {
  uint32 value = 1;
}

// Uplink capacity, in MB.
message UplinkCapacity {
  uint32 value = 1;
}

// Downlink capacity, in MB.
message DownlinkCapacity {
  uint32 value = 1;
}

message WriteBuffer {
  // Buffer size in bytes.
  uint32 size = 1;
}

message ReadBuffer {
  // Buffer size in bytes.
  uint32 size = 1;
}

message ConnectionReuse {
  bool enable = 1;
}

// Pre-shared secret between client and server. It is used for traffic obfuscation.
// Note that if seed is absent in the config, the traffic will still be obfuscated,
// but by a predefined algorithm.
message EncryptionSeed {
  string seed = 1;
}

message Config {
  MTU mtu = 1;
  TTI tti = 2;
  UplinkCapacity uplink_capacity = 3;
  DownlinkCapacity downlink_capacity = 4;
  bool congestion = 5;
  WriteBuffer write_buffer = 6;
  ReadBuffer read_buffer = 7;
  xray.common.serial.TypedMessage header_config = 8;
  reserved 9;
  EncryptionSeed seed = 10;
}