[lwip-users] TCP over ethernet

[ramash]

Hi All,
        I have been using LWIP 1.2.0 code for Ethernet based transmission; I 
have
some doubts regarding Acknowledgement numbers. In the lwip code for TCP we
can call 
Lwip_accept->netconn_accept,from here it calls 
     sys_mbox_fetch(conn->acceptmbox, (void **)&newconn);

Now the client send an Acknowledgement for this accept packet. Please
clarify how is this utilized to send data packets?

Lwip_send->netconn_write,sys_mbox_fetch(conn->mbox, NULL);  
How the data, sequence number and Acknowledgement number are passed, whether
they are hard coded or retrieved from the Acknowledgement packet from VC
client code, If they are retrieved where they are done? 

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