[En-Nut-Discussion] TCP bug

[Ralph Mason]

Well here is another Use for NutEventPostAsync

When you accept using NutTcpAcept if the Accepting thread priority is higher
than the TCP state machine thread you get a returned socket that is not
established.

So Receive returns -1.

>From tcpsm.c

            break;
        case TCPS_ESTABLISHED:
            /*
             * ACK of SYN received.
             */
            /* wake up accepting thread on passive socket. */
*****       NutEventPost(&sock->so_pc_tq);
            break;
        case TCPS_FIN_WAIT_1:


Context switch happens at the **** before the accpet is finished.

A NutEventPostAsync fixes this.

Regards,
Ralph

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