[Qt C++] Packet loss

Hi, iam making BOT in Qt c++ for one small game.. Everything works fine.. iam using QTcpsocket::readyRead() and then QByteArray message = socket.readAll();.. but now i found that i miss some packets, like when i track other players positions it does not update everytime, but very often.. I found on internet that the data over sockets are send by packeges, but its size is sent before the package.. and i need wait for when the package is full recieved and then read.. I dont really know how i would do this.. (Theres no problem with the packets, like they are not half-only, but i miss some of them).. Sorry for my english, i hope someone will help me.
There is pic of how the packets looks like:
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Quote:

I found on internet that the data over sockets are send by packeges, but its size is sent before the package..

That depends on the Byte Order.

Size is usually sent in the packet header, which can vary in size (most of the time it will be 4 or 8). Also, I`m not sure how the QT TCP socket class works, but if it is a blocking implementation, some data might be lost. Try an other multiplexing solution, like an IOCP solution.