[lwip-users] Incorrect ACK number for the TCP Server with PPPoS, NetConn and FreeRTOS

[sarp]

I am implementing a TCP Server with PPPoS where NO_SYS = 0(FreeRTOS).

Everything is OK, one thread feeds ppp and the other opens a netconn socket
for server and starts listening.

However, when a client is connected, connection is reset because of
incorrect ACK number with

      the switch case SYN_RCVD of tcp_process() by the function tcp_rst() in
tcp_in.c

What could be the reason for that?





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