xquic demo binaries only transfer files smaller than 2GiB

[MPK1]

After several tests under different conditions, I am not able to transfer files of 2GiB or larger with xquic. I use the following commands for the file transfer:

./demo_client -a 10.0.0.2 -p 4433 -D downloads -K 300 -c c -C -t 300 -l d -L logs/client.log -k logs/keys.log -U "https://10.0.0.2:4433/FILE"

./demo_server -p 4433 -D www -c c -C -l d -L logs/server.log -k logs/keys.log

If the FILE is smaller than 2GiB, the transfer is successful. If not, the transfer fails reproducible.

I attached a zip file containing a pcap and the exported keylogfiles. The pcap contains two different connections (I merged the pcaps and keylogs for convenience). The first one (frame 1-22) is with a 3GiB file and the second one (frame 23-43) is with a 2KiB file.

If you know what's wrong here, feel free to tell me. I'm trying to find the reason too, let's see who is faster ;)