static pj_status_t tls_destroy(pjsip_transport *transport, 
			       pj_status_t reason)
{
    struct tls_transport *tls = (struct tls_transport*)transport;

    if (tls->close_reason == 0)
	tls->close_reason = reason;

    if (tls->is_registered) {
	tls->is_registered = PJ_FALSE;
	pjsip_transport_destroy(transport);

	/* pjsip_transport_destroy will recursively call this function
	 * again.
	 */
	return PJ_SUCCESS;
    }

    /* Mark transport as closing */
    tls->is_closing = PJ_TRUE;

    /* Stop keep-alive timer. */
    if (tls->ka_timer.id) {
	pjsip_endpt_cancel_timer(tls->base.endpt, &tls->ka_timer);
	tls->ka_timer.id = PJ_FALSE;
    }

    /* Cancel all delayed transmits */
    while (!pj_list_empty(&tls->delayed_list)) {
	struct delayed_tdata *pending_tx;
	pj_ioqueue_op_key_t *op_key;

	pending_tx = tls->delayed_list.next;
	pj_list_erase(pending_tx);

	op_key = (pj_ioqueue_op_key_t*)pending_tx->tdata_op_key;

	on_data_sent(tls->ssock, op_key, -reason);
    }

    if (tls->ssock) {
	pj_ssl_sock_close(tls->ssock);
	tls->ssock = NULL;
    }

    if (tls->grp_lock) {
	pj_grp_lock_t *grp_lock = tls->grp_lock;
	tls->grp_lock = NULL;
	pj_grp_lock_dec_ref(grp_lock);
	/* Transport may have been deleted at this point */
    }

    return PJ_SUCCESS;
}
static pj_status_t tls_destroy(pjsip_transport *transport, 
			       pj_status_t reason)
{
    struct tls_transport *tls = (struct tls_transport*)transport;

    if (tls->close_reason == 0)
	tls->close_reason = reason;

    if (tls->is_registered) {
	tls->is_registered = PJ_FALSE;
	pjsip_transport_destroy(transport);

	 
	return PJ_SUCCESS;
    }

     
    tls->is_closing = PJ_TRUE;

     
    if (tls->ka_timer.id) {
	pjsip_endpt_cancel_timer(tls->base.endpt, &tls->ka_timer);
	tls->ka_timer.id = PJ_FALSE;
    }

     
    while (!pj_list_empty(&tls->delayed_list)) {
	struct delayed_tdata *pending_tx;
	pj_ioqueue_op_key_t *op_key;

	pending_tx = tls->delayed_list.next;
	pj_list_erase(pending_tx);

	op_key = (pj_ioqueue_op_key_t*)pending_tx->tdata_op_key;

	on_data_sent(tls->ssock, op_key, -reason);
    }

    if (tls->ssock) {
	pj_ssl_sock_close(tls->ssock);
	tls->ssock = NULL;
    }

    if (tls->grp_lock) {
	pj_grp_lock_t *grp_lock = tls->grp_lock;
	tls->grp_lock = NULL;
	pj_grp_lock_dec_ref(grp_lock);
	 
    }

    return PJ_SUCCESS;
}