/// <summary>
/// MCP封包解碼(一次解讀一條MCP命令)
/// </summary>
/// <param name="socket">作用中的Socket類別</param>
/// <param name="Token">SocketToken類別</param>
/// <returns>返回值：true=解碼成功 false=解碼失敗</returns>
internal static bool McpDecode(Socket socket, SocketToken Token) {
PacketBuffer cPacket = Token.ReceiveBuffer;
if ((cPacket.Position + 4) >= cPacket.Length) { //如果封包沒有長度表示封包不完整(需要合併)
return false;
}
int iSize = ((cPacket[3] << 8) + cPacket[4]) + 6;
if ((cPacket.Position + iSize) > cPacket.Length) {
if (logger.IsWarnEnabled) logger.WarnFormat("[McpDecoder.McpDecode] MCP封包內Length值過大... CurrentIndex={0}, MCP_Length={1}, packetSize={2}", cPacket.Position, iSize, cPacket.Length);
return false;
}
//判斷是否是結束字元
if (cPacket[iSize - 1] == 0xe) {
byte bType = cPacket[1];
byte bCommand = cPacket[2];
if (bType == 0x03 && bCommand == 0x01) { //是否為伺服器傳來的心跳包
if (logger.IsDebugEnabled) logger.DebugFormat("[McpDecoder.McpDecode] Socket({0}) 收到伺服器送來的心跳包...", socket.Handle.ToInt32());
} else {
if (McpPacketProc != null) {
Token.SetPackage(iSize);
if (logger.IsDebugEnabled) logger.DebugFormat("[McpDecoder.McpDecode] Socket({0}) Type={1}, Command={2}", socket.Handle.ToInt32(), bType, bCommand);
if (logger.IsDebugEnabled) logger.DebugFormat("[McpDecoder.McpDecode] Packet Dump:{0}", Token.Package.ToString());
McpPacketEvent cEvent = Token.McpPacketEvent;
cEvent.ActiveSocket = socket;
McpPacketProc(cEvent);
}
}
cPacket.Position += (iSize - 1);
return true;
}
return false;
}
private static void PacketDecode(Socket socket, SocketToken Token, bool IsDecode) {
int iCheck = 0;
PacketBuffer cPacket = Token.ReceiveBuffer;
cPacket.Position = -1;
while (++cPacket.Position < cPacket.Length) {
iCheck = VerifyPacket(cPacket);
switch (iCheck) {
case -1: //未知封包
if (Token.IsStart) {
if (cPacket[0] == 0x0b) {
if (McpDecoder.McpDecode(socket, Token)) {
continue;
}
}
Token.IsStart = false;
}
Token.AddTemp();
break;
case 0: //完整封包
int iSize = cPacket[3] + 4;
Token.SetPackage(iSize);
DecodeFinance(socket, Token.StockEvent, IsDecode);
cPacket.Position += (iSize - 1);
Token.IsStart = true;
break;
case 1: //末端斷包
while (++cPacket.Position < cPacket.Length)
Token.AddTemp();
break;
}
}
}