[lwip-devel] [bug #26069] Connect to a remote IP address which is not present makes the APP hang

[Rikke Ottesen]

Follow-up Comment #8, bug #26069 (project lwip):

Yes, but the problem is that the pcb->state is SYN_SENT, and this is not
checked.
I have added some code to make that check

    if (pcb->state == SYN_SENT) {
      if ((u32_t)(tcp_ticks - pcb->tmr) > 10) {
        ++pcb_remove;
        LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in
SYN_SENTn"));
      }
    }

Otherwise it will never go into the
/* If the PCB should be removed, do it. */ 
and call 
 TCP_EVENT_ERR(pcb->errf, pcb->callback_arg, ERR_ABRT); 

That is the main problem.

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