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Hello, I have observed that the callback function(raw
API interface)specified by tcp_sent()is erroneously called when a TCP packet is
received with the ACK flag set and the ackno value (TCP header) does not
acknowledges new data and differs from pcb->lastack. In this case
pcb->acked is not cleared as expected by the tcp_receive() function and the
callback function is erroneously called from the tcp_process() function if the
"old, not updated" pcb->acked value differs from zero. As
conseguence the application program computes a total number of acknowledged
bytes that is greater than the total number of transmitted data bytes. I have found that
if the code "pcb->acked = 0" is inserted at the beginning of the
tcp_receive() function this problem disappears. Regards Danilo Bessone --------------------------------------------------------------------
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