[lwip-users] question about tcp thread

[jack W]

hi everyone  


      i established a tcp thread on the lwip . and it is a tcp server on the 
port 2020

when a client connects to the server , it successes.  but when the server send 
data to the client ,it like to go into a cycle ,and on the super teminal it 
displays:
        "
        tcp_output: nothing to send

        tcp_output: snd_wnd 65535, cwnd 256, wnd 256, seg == NULL, ack 6565 "

i think that the thread  always use the function tcp_output ,  and the api 
function netconn_write();