[En-Nut-Discussion] TCP Socket closed after with third TCP Request

[Joachim Skale]

hi all, 

i've got the following problem.
I use the Ethernut Board as TCP Client which validates Cards via TCP Request on an server.
Within the Third Request the Socket State changed from ESTABLISHED to CLOSED.

When i debug into the Sources of the TCP, i saw that 

/*
     * Wait until any data arrived, a timeout occurs
     * or the connection terminates.
     */
    while (sock->so_rx_cnt - sock->so_rd_cnt == 0) {
        if (sock->so_state != TCPS_ESTABLISHED) {
            sock->so_last_error = ENOTCONN;
            return -1;
        }
        if (NutEventWait(&sock->so_rx_tq, sock->so_read_to))
            return 0;
    }

in this code segment the socket state is changed to closed.

My Server didn't close the Connection.

Any hints??


Joachim