private void decode_Response(PhotonCmdHeader cmd_hdr, BinaryReader packet)
{
// see func ReliableMessage() decode in...
// https://github.com/broderickhyman/photon_spectator/blob/master/photon_command.go
var opResponse = new ReliableMessage_Response();
opResponse.ChannelID = cmd_hdr.ChannelID;
opResponse.OperationCode = packet.ReadByte(); // Operation Code
opResponse.OperationResponseCode = packet.ReadUInt16(); // Operation Response Code
opResponse.OperationDebugByte = packet.ReadByte(); // Operation Debug Byte
opResponse.ParameterCount = packet.ReadInt16(); // Parameter Count (?? is this valid for all msg types?)
Event_Photon_Cmd_Info?.Invoke("Photon Reliable Response - " + opResponse.OperationResponseCode);
var parameters = new ReliableMessage_Response.Paramaters();
// decode the paramaters
for (int i = 0; i < opResponse.ParameterCount; i++)
{
var paramID = packet.ReadByte(); // paramID
PhotonParamType paramType = (PhotonParamType)packet.ReadByte(); // paramType
var param_value = Decode_PhotonValueType.Decode(packet, paramType);
parameters[paramID] = param_value;
Event_Photon_Info?.Invoke("ParamID: " + paramID + " value: " + param_value.ToString());
}
opResponse.ParamaterData = parameters;
Event_Photon_ReliableResponse?.Invoke(opResponse);
}
public void decodeUDPPacket(BinaryReader packet)
{
const int CMD_HDR_LEN = 12;
// read Photon Header
packet.ReadUInt16(); // PeerID
packet.ReadByte(); // CrcEnabled
int cmd_count = (int)packet.ReadByte(); // Command Count
packet.ReadUInt32(); // Timestamp
packet.ReadInt32(); // Challenge
Event_Photon_Info?.Invoke(String.Format("Photon Packet with ({0}) commands", cmd_count));
for (int cmd_number = 0; cmd_number < cmd_count; cmd_number++)
{
// ********SSSS*****************************
// Decode Photon Command Header
// *************************************
var cmd_hdr = new PhotonCmdHeader();
cmd_hdr.type /**/ = (CommandType)packet.ReadByte(); // Type
cmd_hdr.ChannelID /**/ = packet.ReadByte(); // ChannelID
cmd_hdr.flags /**/ = packet.ReadByte(); // Flags
cmd_hdr.ReservedByte /**/ = packet.ReadByte(); // ReservedByte
cmd_hdr.CmdLength /**/ = packet.ReadInt32(); // Length -- ? uint32 ?
cmd_hdr.ReliableSequenceNumber /**/ = packet.ReadInt32(); // reliablesequencenumber -- ? uint32 ?
int data_length = cmd_hdr.CmdLength - CMD_HDR_LEN;
Event_Photon_Cmd_Info?.Invoke(
String.Format(" [{0}] Photon Cmd - {1}:{2} len {3}",
cmd_number, cmd_hdr.type.ToString(), (int)cmd_hdr.type, cmd_hdr.CmdLength));
// ***** read command data ****
byte[] data = packet.ReadBytes(data_length);
try { decode_PhotonPacket(cmd_hdr, data); }
#if HIDE_PARSE_ERRORS
catch (System.IO.EndOfStreamException ex) {
}
#endif
finally {}
} // for loop
}
private void decode_PhotonPacket(PhotonCmdHeader cmd_hdr, byte[] data)
{
var packet = new BeBinaryReader(new MemoryStream(data, 0, data.Length));
// *************************************
// Decode Photon Packet Payload
// *************************************
switch (cmd_hdr.type)
{
case CommandType.Acknowledge: // 8 bytes of parms
packet.ReadUInt32(); // RecvRelSeqNum
packet.ReadUInt32(); // RecvSentTime
break;
case CommandType.SendUnreliable:
packet.ReadUInt32(); // UnRelSeqNum
break;
case CommandType.SendReliableFragment: // 20 bytes of parms
packet.ReadUInt32(); // Frag_start_seq_num
packet.ReadUInt32(); // Frag_frag_count
packet.ReadUInt32(); // Frag_frag_num
packet.ReadUInt32(); // Frag_total_len
packet.ReadUInt32(); // Frag_frag_off
// TODO: implement fragment reassambly
// https://github.com/broderickhyman/photon_spectator/blob/master/fragment_buffer.go
break;
case CommandType.SendReliable:
// **** RELIABLE COMMAND HEADER ****
int rel_msg_sig = packet.ReadByte(); // Reliable Message Signature
RelMessageTypes rel_msg_type = (RelMessageTypes)packet.ReadByte(); // reliable message type
if ((int)rel_msg_type > 128)
{
// encrypted message types not supported
Event_Photon_Info?.Invoke("Decode_Photon: ignoring encrypted message type: " + rel_msg_type.ToString());
break;
}
// *************************************
// Decode Photon Reliable Message Types
// *************************************
switch (rel_msg_type)
{
case RelMessageTypes.Request:
decode_Request(cmd_hdr, packet);
break;
case RelMessageTypes.EventData:
decode_EventData(cmd_hdr, packet);
break;
case RelMessageTypes.Response:
case RelMessageTypes.ResponseAlt:
decode_Response(cmd_hdr, packet);
break;
default:
break;
}
break;
case CommandType.Connect:
case CommandType.VerifyConnect:
case CommandType.Ping:
break;
default:
Event_Photon_Info?.Invoke("Decode_Photon: ignoring unknown command type: " + cmd_hdr.type.ToString());
break;
}
}