QTcpSocket write data with packet loss - Idiot proof sample does not work!

[jboban]

it is important what terms you use to refer to protocol data units -- "packets" are data units of the network layer (i.e. Internet Protocol (IP)), "segments" are data units of the TCP protocol (transport layer), let's not mix the two.

Ok, I mean segments, or my data chunks. Now I confirm that "missed" data is the last segment sent. You right about that. Thank you.

It doesn't mean you are reading any data. We only know it sits in your socket.

Now I changed the server code and actually read all available bytes but all the same happens.

Again, when I try dd if=./tcp.bin > /dev/tcp/<server_ip>/<server_port> everything is fine. So, server side is just fine. The problem is on client side.

tcpDump2.jpg

The code will simply fail to work e.g. in a case where the data you're trying to send is larger than 16382 (or even 16378) bytes.

Where is that limitation? As I can see there is quint16 (64k) buffer size which gives me 32k files transfer with DataStream serialization.

What is your suggestion? How to change my protocol at network layer?