syntax = "proto3";

package AcFunDanmu;

import "TokenInfo.proto";

message PacketHeader {
    int32 appId = 1;
    int64 uid = 2;
    int64 instanceId = 3;
    uint32 flags = 5;
    EncodingType encodingType = 6;
    uint32 decodedPayloadLen = 7;
    EncryptionMode encryptionMode = 8;
    TokenInfo tokenInfo = 9;
    int64 seqId = 10;
    repeated Feature features = 11;
    string kpn = 12;

    enum Flags {
        option allow_alias = true;
        kDirUpstream = 0;
        kDirDownstream = 1;
        kDirMask = 1;
    }
    enum EncodingType {
        kEncodingNone = 0;
        kEncodingLz4 = 1;
    }
    enum EncryptionMode {
        kEncryptionNone = 0;
        kEncryptionServiceToken =1;
        kEncryptionSessionKey = 2;
    }
    enum Feature {
        kReserve = 0;
        kCompressLz4 = 1;
    }
}