syntax = "proto3"; package livekit;option go_package = "github.com/livekit/protocol/livekit";option csharp_namespace = "LiveKit.Proto";option ruby_package = "LiveKit::Proto"; // internal protos, not exposed to clientsimport "livekit_models.proto";import "livekit_rtc.proto";import "livekit_room.proto"; enum NodeType {  SERVER = 0;  CONTROLLER = 1;  MEDIA = 2;  TURN = 4;} enum NodeState {  STARTING_UP = 0;  SERVING = 1;  SHUTTING_DOWN = 2;} message Node {  string id = 1;  string ip = 2;  uint32 num_cpus = 3;  NodeStats stats = 4;  NodeType type = 5;  NodeState state = 6;  string region = 7;} message NodeStats {  // when server was started  int64 started_at = 1;  // when server last reported its status  int64 updated_at = 2;   // room  int32 num_rooms = 3;  int32 num_clients = 4;  int32 num_tracks_in = 5;  int32 num_tracks_out = 6;   // packet  uint64 bytes_in = 7;  uint64 bytes_out = 8;  uint64 packets_in = 9;  uint64 packets_out = 10;  uint64 nack_total = 11;  float bytes_in_per_sec = 12;  float bytes_out_per_sec = 13;  float packets_in_per_sec = 14;  float packets_out_per_sec = 15;  float nack_per_sec = 16;   // system  uint32 num_cpus = 17;  float load_avg_last1min = 18;  float load_avg_last5min = 19;  float load_avg_last15min = 20;  float cpu_load = 21;  uint32 sys_packets_out = 28;  uint32 sys_packets_dropped = 29;  float sys_packets_out_per_sec = 30;  float sys_packets_dropped_per_sec = 31;  float sys_packets_dropped_pct_per_sec = 32;   // retransmissions  uint64 retransmit_bytes_out = 22;  uint64 retransmit_packets_out = 23;  float retransmit_bytes_out_per_sec = 24;  float retransmit_packets_out_per_sec = 25;   // participant joins  uint64 participant_join = 26;  float participant_join_per_sec = 27;} // message to RTC nodesmessage RTCNodeMessage {  string participant_key = 1;  int64 sender_time = 11;  string connection_id = 13;  oneof message {    StartSession start_session = 2;    SignalRequest request = 3;    // internal messages    RoomParticipantIdentity remove_participant = 4;    MuteRoomTrackRequest mute_track = 5;    UpdateParticipantRequest update_participant = 6;    DeleteRoomRequest delete_room = 7;    UpdateSubscriptionsRequest update_subscriptions = 8;    SendDataRequest send_data = 9;    UpdateRoomMetadataRequest update_room_metadata = 10;    KeepAlive keep_alive = 12;  }} // message to Signal nodesmessage SignalNodeMessage {  string connection_id = 1;  oneof message {    SignalResponse response = 2;    EndSession end_session = 3;  }} message StartSession {  string room_name = 1;  string identity = 2;  string connection_id = 3;  // if a client is reconnecting (i.e. resume instead of restart)  bool reconnect = 4;  bool auto_subscribe = 9;  bool hidden = 10;  ClientInfo client = 11;  bool recorder = 12;  string name = 13;  // A user's ClaimGrants serialized in JSON  string grants_json = 14;  bool adaptive_stream = 15;  //if reconnect, client will set current sid  string participant_id = 16; } message EndSession {} message RemoveParticipant {  string participant_id = 1;} message KeepAlive {}