Packet sent from f-stack vs non f-stack have IP fields

[lotusdew-dushyant-goel]

Hi experts,

I am connecting to a server with a f-stack client, based on the helloworld_epoll example. But communication is not established. I looked at packets flowing out from f-stack client and a C client with Wireshark and there were only 2 differences:

• in the IP header, Identification Field (https://en.wikipedia.org/wiki/Internet_Protocol_version_4#Identification)
• in the TCP header the Window Size (bytes 15-16 in the TCP header) are different.

Here are additional details:

The server client communication goes as follows: client [SYN] seq0 --> server server [SYN, ACK] seq0, ack1 --> client client [ACK] seq1, ack1 --> server client [ACK] seq1, ack1 TCP Window Update server [RST, ACK] seq1, ack1

Is the window size (TCP ) something controlled by f-stack? Please tell me if there is additional information that is required.

Thanks

[jfb8856606]

Can you show your client code and config.ini.