pjnath negotiation fails under Windows with short timeouts

[florian.winterstein@xxxxxxxxx (Florian Winterstein)]

Hi,

I have been playing with pjnath. Things usually work fine if I use a large
(e.g. > 50ms) timeout for the pj_ioqueue_poll function.

However I don't want the thread to wait in pj_ioqueue_poll. If I reduce the
timeout to 1-10ms  the ICE negotiation fails (different error codes). The
process_ function gets called in a loop over and over without interruption.

Here is the code...


void process_(uint32 maxMs)
{
    pj_time_val maxTimeout = {0, 0};
    maxTimeout.msec = maxMs;

    pj_time_val timeout = {0, 0};
    timeout.sec = 0;
    timeout.msec = 0;
    pj_timer_heap_poll(_iceConfig->stun_cfg.timer_heap, &timeout);

    if (timeout.sec < 0 || timeout.msec < 0) {
        timeout.sec = 0;
        timeout.msec = 0;
    }
    else if (timeout.msec >= 1000) {
        timeout.msec = 999;
    }

    if (PJ_TIME_VAL_GT(timeout, maxTimeout)) {
        timeout = maxTimeout;
    }

    unsigned netEventCount = 0;
    int c = 0;
    do {
        c = pj_ioqueue_poll(_iceConfig->stun_cfg.ioqueue, &timeout);
        if (c < 0) {
            pj_status_t err = pj_get_netos_error();
            pj_thread_sleep(PJ_TIME_VAL_MSEC(timeout));
            return;
        }
        else if (c == 0) {
            break;
        }
        else {
            netEventCount += c;
            timeout.sec = 0;
            timeout.msec = 0;
        }
    } while (c > 0 && netEventCount < PJSIP_MAX_NET_EVENTS);

    return;
}
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