Example #1
0
/*
 *	State machine for state 2, Awaiting Release State.
 *	The handling of the timer(s) is in file ax25_std_timer.c
 *	Handling of state 0 and connection release is in ax25.c.
 */
static int ax25_std_state2_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
{
	switch (frametype) {
	case AX25_SABM:
	case AX25_SABME:
		ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
		break;

	case AX25_DISC:
		ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
		ax25_disconnect(ax25, 0);
		break;

	case AX25_DM:
	case AX25_UA:
		if (pf)
			ax25_disconnect(ax25, 0);
		break;

	case AX25_I:
	case AX25_REJ:
	case AX25_RNR:
	case AX25_RR:
		if (pf) ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
		break;

	default:
		break;
	}

	return 0;
}
Example #2
0
/* dl1bke 960114: The DAMA protocol requires to send data and SABM/DISC
 *                within the poll of any connected channel. Remember 
 *                that we are not allowed to send anything unless we
 *                get polled by the Master.
 *
 *                Thus we'll have to do parts of our T1 handling in
 *                ax25_enquiry_response().
 */
void ax25_t1_timeout(ax25_cb *ax25)
{	
	switch (ax25->state) {
		case AX25_STATE_1: 
			if (ax25->n2count == ax25->n2) {
				if (ax25->modulus == AX25_MODULUS) {
					ax25_disconnect(ax25, ETIMEDOUT);
				} else {
					ax25->modulus = AX25_MODULUS;
					ax25->window  = ax25_dev_get_value(ax25->device, AX25_VALUES_WINDOW);
					ax25->n2count = 0;
					ax25_send_control(ax25, AX25_SABM, ax25_dev_is_dama_slave(ax25->device) ? AX25_POLLOFF : AX25_POLLON, AX25_COMMAND);
				}
			} else {
				ax25->n2count++;
				if (ax25->modulus == AX25_MODULUS)
					ax25_send_control(ax25, AX25_SABM, ax25_dev_is_dama_slave(ax25->device) ? AX25_POLLOFF : AX25_POLLON, AX25_COMMAND);
				else
					ax25_send_control(ax25, AX25_SABME, ax25_dev_is_dama_slave(ax25->device) ? AX25_POLLOFF : AX25_POLLON, AX25_COMMAND);
			}
			break;

		case AX25_STATE_2:
			if (ax25->n2count == ax25->n2) {
				ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
				ax25_disconnect(ax25, ETIMEDOUT);
			} else {
				ax25->n2count++;
				if (!ax25_dev_is_dama_slave(ax25->device))
					ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
			}
			break;

		case AX25_STATE_3: 
			ax25->n2count = 1;
			if (!ax25->dama_slave)
				ax25_transmit_enquiry(ax25);
			ax25->state   = AX25_STATE_4;
			break;

		case AX25_STATE_4:
			if (ax25->n2count == ax25->n2) {
				ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
				ax25_disconnect(ax25, ETIMEDOUT);
			} else {
				ax25->n2count++;
				if (!ax25->dama_slave)
					ax25_transmit_enquiry(ax25);
			}
			break;
	}

	ax25->t1timer = ax25->t1 = ax25_calculate_t1(ax25);

	ax25_set_timer(ax25);
}
Example #3
0
void ax25_std_t1timer_expiry(ax25_cb *ax25)
{
	switch (ax25->state) {
	case AX25_STATE_1:
		if (ax25->n2count == ax25->n2) {
			if (ax25->modulus == AX25_MODULUS) {
				ax25_disconnect(ax25, ETIMEDOUT);
				return;
			} else {
				ax25->modulus = AX25_MODULUS;
				ax25->window  = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
				ax25->n2count = 0;
				ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
			}
		} else {
			ax25->n2count++;
			if (ax25->modulus == AX25_MODULUS)
				ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
			else
				ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);
		}
		break;

	case AX25_STATE_2:
		if (ax25->n2count == ax25->n2) {
			ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
			ax25_disconnect(ax25, ETIMEDOUT);
			return;
		} else {
			ax25->n2count++;
			ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
		}
		break;

	case AX25_STATE_3:
		ax25->n2count = 1;
		ax25_std_transmit_enquiry(ax25);
		ax25->state   = AX25_STATE_4;
		break;

	case AX25_STATE_4:
		if (ax25->n2count == ax25->n2) {
			ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
			ax25_disconnect(ax25, ETIMEDOUT);
			return;
		} else {
			ax25->n2count++;
			ax25_std_transmit_enquiry(ax25);
		}
		break;
	}

	ax25_calculate_t1(ax25);
	ax25_start_t1timer(ax25);
}
void ax25_transmit_buffer(ax25_cb *ax25, struct sk_buff *skb, int type)
{
    struct sk_buff *skbn;
    unsigned char *ptr;
    int headroom;

    if (ax25->ax25_dev == NULL) {
        ax25_disconnect(ax25, ENETUNREACH);
        return;
    }

    headroom = ax25_addr_size(ax25->digipeat);

    if (skb_headroom(skb) < headroom) {
        if ((skbn = skb_realloc_headroom(skb, headroom)) == NULL) {
            printk(KERN_CRIT "AX.25: ax25_transmit_buffer - out of memory\n");
            kfree_skb(skb);
            return;
        }

        if (skb->sk != NULL)
            skb_set_owner_w(skbn, skb->sk);

        kfree_skb(skb);
        skb = skbn;
    }

    ptr = skb_push(skb, headroom);

    ax25_addr_build(ptr, &ax25->source_addr, &ax25->dest_addr, ax25->digipeat, type, ax25->modulus);

    ax25_queue_xmit(skb, ax25->ax25_dev->dev);
}
Example #5
0
/*
 *	State machine for state 1, Awaiting Connection State.
 *	The handling of the timer(s) is in file ax25_timer.c.
 *	Handling of state 0 and connection release is in ax25.c.
 */
static int ax25_state1_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type, int dama)
{
	switch (frametype) {
		case AX25_SABM:
			ax25->modulus = AX25_MODULUS;
			ax25->window  = ax25_dev_get_value(ax25->device, AX25_VALUES_WINDOW);
			ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
			break;

		case AX25_SABME:
			ax25->modulus = AX25_EMODULUS;
			ax25->window  = ax25_dev_get_value(ax25->device, AX25_VALUES_EWINDOW);
			ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
			break;

		case AX25_DISC:
			ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
			break;

		case AX25_UA:
			if (pf || dama) {
				if (dama) ax25_dama_on(ax25); /* bke */
				ax25_calculate_rtt(ax25);
				ax25->t1timer = 0;
				ax25->t3timer = ax25->t3;
				ax25->idletimer = ax25->idle;
				ax25->vs      = 0;
				ax25->va      = 0;
				ax25->vr      = 0;
				ax25->state   = AX25_STATE_3;
				ax25->n2count = 0;
				ax25->dama_slave = dama;	/* bke */
				if (ax25->sk != NULL) {
					ax25->sk->state = TCP_ESTABLISHED;
					/* For WAIT_SABM connections we will produce an accept ready socket here */
					if (!ax25->sk->dead)
						ax25->sk->state_change(ax25->sk);
				}
			}
			break;

		case AX25_DM:
			if (pf) {
				if (ax25->modulus == AX25_MODULUS) {
					ax25_disconnect(ax25, ECONNREFUSED);
				} else {
					ax25->modulus = AX25_MODULUS;
					ax25->window  = ax25_dev_get_value(ax25->device, AX25_VALUES_WINDOW);
				}
			}
			break;

		default:
			if (dama && pf)
				ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
			break;
	}

	return 0;
}
Example #6
0
/*
 *	State machine for state 1, Awaiting Connection State.
 *	The handling of the timer(s) is in file ax25_std_timer.c.
 *	Handling of state 0 and connection release is in ax25.c.
 */
static int ax25_std_state1_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
{
	switch (frametype) {
	case AX25_SABM:
		ax25->modulus = AX25_MODULUS;
		ax25->window  = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
		ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
		break;

	case AX25_SABME:
		ax25->modulus = AX25_EMODULUS;
		ax25->window  = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
		ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
		break;

	case AX25_DISC:
		ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
		break;

	case AX25_UA:
		if (pf) {
			ax25_calculate_rtt(ax25);
			ax25_stop_t1timer(ax25);
			ax25_start_t3timer(ax25);
			ax25_start_idletimer(ax25);
			ax25->vs      = 0;
			ax25->va      = 0;
			ax25->vr      = 0;
			ax25->state   = AX25_STATE_3;
			ax25->n2count = 0;
			if (ax25->sk != NULL) {
				bh_lock_sock(ax25->sk);
				ax25->sk->sk_state = TCP_ESTABLISHED;
				/* For WAIT_SABM connections we will produce an accept ready socket here */
				if (!sock_flag(ax25->sk, SOCK_DEAD))
					ax25->sk->sk_state_change(ax25->sk);
				bh_unlock_sock(ax25->sk);
			}
		}
		break;

	case AX25_DM:
		if (pf) {
			if (ax25->modulus == AX25_MODULUS) {
				ax25_disconnect(ax25, ECONNREFUSED);
			} else {
				ax25->modulus = AX25_MODULUS;
				ax25->window  = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
			}
		}
		break;

	default:
		break;
	}

	return 0;
}
Example #7
0
/*
 *	State machine for state 1, Awaiting Connection State.
 *	The handling of the timer(s) is in file ax25_ds_timer.c.
 *	Handling of state 0 and connection release is in ax25.c.
 */
static int ax25_ds_state1_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
{
    switch (frametype) {
    case AX25_SABM:
        ax25->modulus = AX25_MODULUS;
        ax25->window  = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
        ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
        break;

    case AX25_SABME:
        ax25->modulus = AX25_EMODULUS;
        ax25->window  =  ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
        ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
        break;

    case AX25_DISC:
        ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
        break;

    case AX25_UA:
        ax25_calculate_rtt(ax25);
        ax25_stop_t1timer(ax25);
        ax25_start_t3timer(ax25);
        ax25_start_idletimer(ax25);
        ax25->vs      = 0;
        ax25->va      = 0;
        ax25->vr      = 0;
        ax25->state   = AX25_STATE_3;
        ax25->n2count = 0;
        if (ax25->sk != NULL) {
            ax25->sk->state = TCP_ESTABLISHED;
            /* For WAIT_SABM connections we will produce an accept ready socket here */
            if (!ax25->sk->dead)
                ax25->sk->state_change(ax25->sk);
        }
        ax25_dama_on(ax25);

        /* according to DK4EG´s spec we are required to
         * send a RR RESPONSE FINAL NR=0. Please mail
         * <*****@*****.**> if this causes problems
         * with the TheNetNode DAMA Master implementation.
         */

        ax25_std_enquiry_response(ax25);
        break;

    case AX25_DM:
        if (pf) ax25_disconnect(ax25, ECONNREFUSED);
        break;

    default:
        if (pf) ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
        break;
    }

    return 0;
}
Example #8
0
/*
 *	Kill all bound sockets on a dropped device.
 */
static void ax25_kill_by_device(struct device *dev)
{
	ax25_dev *ax25_dev;
	ax25_cb *s;

	if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
		return;

	for (s = ax25_list; s != NULL; s = s->next) {
		if (s->ax25_dev == ax25_dev) {
			s->ax25_dev = NULL;
			ax25_disconnect(s, ENETUNREACH);
		}
	}
}
Example #9
0
/*
 *	State machine for state 3, Connected State.
 *	The handling of the timer(s) is in file ax25_timer.c
 *	Handling of state 0 and connection release is in ax25.c.
 */
static int ax25_ds_state3_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int ns, int nr, int pf, int type)
{
    int queued = 0;

    switch (frametype) {
    case AX25_SABM:
    case AX25_SABME:
        if (frametype == AX25_SABM) {
            ax25->modulus   = AX25_MODULUS;
            ax25->window    = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
        } else {
            ax25->modulus   = AX25_EMODULUS;
            ax25->window    = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
        }
        ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
        ax25_stop_t1timer(ax25);
        ax25_start_t3timer(ax25);
        ax25_start_idletimer(ax25);
        ax25->condition = 0x00;
        ax25->vs        = 0;
        ax25->va        = 0;
        ax25->vr        = 0;
        ax25_requeue_frames(ax25);
        ax25_dama_on(ax25);
        break;

    case AX25_DISC:
        ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
        ax25_dama_off(ax25);
        ax25_disconnect(ax25, 0);
        break;

    case AX25_DM:
        ax25_dama_off(ax25);
        ax25_disconnect(ax25, ECONNRESET);
        break;

    case AX25_RR:
    case AX25_RNR:
        if (frametype == AX25_RR)
            ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
        else
            ax25->condition |= AX25_COND_PEER_RX_BUSY;

        if (ax25_validate_nr(ax25, nr)) {
            if (ax25_check_iframes_acked(ax25, nr))
                ax25->n2count=0;
            if (type == AX25_COMMAND && pf)
                ax25_ds_enquiry_response(ax25);
        } else {
            ax25_ds_nr_error_recovery(ax25);
            ax25->state = AX25_STATE_1;
        }
        break;

    case AX25_REJ:
        ax25->condition &= ~AX25_COND_PEER_RX_BUSY;

        if (ax25_validate_nr(ax25, nr)) {
            if (ax25->va != nr)
                ax25->n2count=0;

            ax25_frames_acked(ax25, nr);
            ax25_calculate_rtt(ax25);
            ax25_stop_t1timer(ax25);
            ax25_start_t3timer(ax25);
            ax25_requeue_frames(ax25);

            if (type == AX25_COMMAND && pf)
                ax25_ds_enquiry_response(ax25);
        } else {
            ax25_ds_nr_error_recovery(ax25);
            ax25->state = AX25_STATE_1;
        }
        break;

    case AX25_I:
        if (!ax25_validate_nr(ax25, nr)) {
            ax25_ds_nr_error_recovery(ax25);
            ax25->state = AX25_STATE_1;
            break;
        }
        if (ax25->condition & AX25_COND_PEER_RX_BUSY) {
            ax25_frames_acked(ax25, nr);
            ax25->n2count = 0;
        } else {
            if (ax25_check_iframes_acked(ax25, nr))
                ax25->n2count = 0;
        }
        if (ax25->condition & AX25_COND_OWN_RX_BUSY) {
            if (pf) ax25_ds_enquiry_response(ax25);
            break;
        }
        if (ns == ax25->vr) {
            ax25->vr = (ax25->vr + 1) % ax25->modulus;
            queued = ax25_rx_iframe(ax25, skb);
            if (ax25->condition & AX25_COND_OWN_RX_BUSY)
                ax25->vr = ns;	/* ax25->vr - 1 */
            ax25->condition &= ~AX25_COND_REJECT;
            if (pf) {
                ax25_ds_enquiry_response(ax25);
            } else {
                if (!(ax25->condition & AX25_COND_ACK_PENDING)) {
                    ax25->condition |= AX25_COND_ACK_PENDING;
                    ax25_start_t2timer(ax25);
                }
            }
        } else {
            if (ax25->condition & AX25_COND_REJECT) {
                if (pf) ax25_ds_enquiry_response(ax25);
            } else {
                ax25->condition |= AX25_COND_REJECT;
                ax25_ds_enquiry_response(ax25);
                ax25->condition &= ~AX25_COND_ACK_PENDING;
            }
        }
        break;

    case AX25_FRMR:
    case AX25_ILLEGAL:
        ax25_ds_establish_data_link(ax25);
        ax25->state = AX25_STATE_1;
        break;

    default:
        break;
    }

    return queued;
}
/*
 *	State machine for state 1, Awaiting Connection State.
 *	The handling of the timer(s) is in file ax25_ds_timer.c.
 *	Handling of state 0 and connection release is in ax25.c.
 */
static int ax25_ds_state1_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
{
	switch (frametype) {
	case AX25_SABM:
		ax25->modulus = AX25_MODULUS;
		ax25->window  = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
		ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
		break;

	case AX25_SABME:
		ax25->modulus = AX25_EMODULUS;
		ax25->window  =  ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
		ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
		break;

	case AX25_DISC:
		ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
		break;

	case AX25_UA:
		ax25_calculate_rtt(ax25);
		ax25_stop_t1timer(ax25);
		ax25_start_t3timer(ax25);
		ax25_start_idletimer(ax25);
		ax25->vs      = 0;
		ax25->va      = 0;
		ax25->vr      = 0;
		ax25->state   = AX25_STATE_3;
		ax25->n2count = 0;
		if (ax25->sk != NULL) {
			bh_lock_sock(ax25->sk);
			ax25->sk->sk_state = TCP_ESTABLISHED;
			/*
			 * For WAIT_SABM connections we will produce an accept
			 * ready socket here
			 */
			if (!sock_flag(ax25->sk, SOCK_DEAD))
				ax25->sk->sk_state_change(ax25->sk);
			bh_unlock_sock(ax25->sk);
		}
		ax25_dama_on(ax25);

		/* according to DK4EG's spec we are required to
		 * send a RR RESPONSE FINAL NR=0.
		 */

		ax25_std_enquiry_response(ax25);
		break;

	case AX25_DM:
		if (pf)
			ax25_disconnect(ax25, ECONNREFUSED);
		break;

	default:
		if (pf)
			ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
		break;
	}

	return 0;
}
Example #11
0
/*
 *	AX.25 TIMER 
 *
 *	This routine is called every 100ms. Decrement timer by this
 *	amount - if expired then process the event.
 */
static void ax25_timer(unsigned long param)
{
	ax25_cb *ax25 = (ax25_cb *)param;

	switch (ax25->state) {
		case AX25_STATE_0:
			/* Magic here: If we listen() and a new link dies before it
			   is accepted() it isn't 'dead' so doesn't get removed. */
			if (ax25->sk == NULL || ax25->sk->destroy || (ax25->sk->state == TCP_LISTEN && ax25->sk->dead)) {
				ax25_destroy_socket(ax25);
				return;
			}
			break;

		case AX25_STATE_3:
		case AX25_STATE_4:
			/*
			 * Check the state of the receive buffer.
			 */
			if (ax25->sk != NULL) {
				if (ax25->sk->rmem_alloc < (ax25->sk->rcvbuf / 2) && (ax25->condition & AX25_COND_OWN_RX_BUSY)) {
					ax25->condition &= ~AX25_COND_OWN_RX_BUSY;
					ax25->condition &= ~AX25_COND_ACK_PENDING;
					if (!ax25->dama_slave)
						ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);
					break;
				}
			}
			/*
			 * Check for frames to transmit.
			 */
			if (!ax25->dama_slave)
				ax25_kick(ax25);
			break;

		default:
			break;
	}

	if (ax25->t2timer > 0 && --ax25->t2timer == 0) {
		if (ax25->state == AX25_STATE_3 || ax25->state == AX25_STATE_4) {
			if (ax25->condition & AX25_COND_ACK_PENDING) {
				ax25->condition &= ~AX25_COND_ACK_PENDING;
				if (!ax25->dama_slave)
					ax25_timeout_response(ax25);
			}
		}
	}

	if (ax25->t3timer > 0 && --ax25->t3timer == 0) {
		/* dl1bke 960114: T3 expires and we are in DAMA mode:  */
		/*                send a DISC and abort the connection */
		if (ax25->dama_slave) {
			ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
			ax25_disconnect(ax25, ETIMEDOUT);
			ax25_set_timer(ax25);
			return;
		}

		if (ax25->state == AX25_STATE_3) {
			ax25->n2count = 0;
			ax25_transmit_enquiry(ax25);
			ax25->state   = AX25_STATE_4;
		}

		ax25->t3timer = ax25->t3;
	}

	if (ax25->idletimer > 0 && --ax25->idletimer == 0) {
		/* dl1bke 960228: close the connection when IDLE expires */
		/* 		  similar to DAMA T3 timeout but with    */
		/* 		  a "clean" disconnect of the connection */

		ax25_clear_queues(ax25);

		ax25->n2count = 0;
		if (!ax25->dama_slave) {
			ax25->t3timer = 0;
			ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
		} else {
			ax25->t3timer = ax25->t3;
		}

		/* state 1 or 2 should not happen, but... */

		if (ax25->state == AX25_STATE_1 || ax25->state == AX25_STATE_2)
			ax25->state = AX25_STATE_0;
		else
			ax25->state = AX25_STATE_2;

		ax25->t1timer = ax25->t1 = ax25_calculate_t1(ax25);
		ax25->t2timer = 0;

		if (ax25->sk != NULL) {
			ax25->sk->state     = TCP_CLOSE;
			ax25->sk->err       = 0;
			ax25->sk->shutdown |= SEND_SHUTDOWN;
			if (!ax25->sk->dead)
				ax25->sk->state_change(ax25->sk);
			ax25->sk->dead      = 1;
		}
	}

	/* dl1bke 960114: DAMA T1 timeouts are handled in ax25_dama_slave_transmit */
	/* 		  nevertheless we have to re-enqueue the timer struct...   */
	if (ax25->t1timer == 0 || --ax25->t1timer > 0) {
		ax25_set_timer(ax25);
		return;
	}

	if (!ax25_dev_is_dama_slave(ax25->device)) {
		if (ax25->dama_slave)
			ax25->dama_slave = 0;
		ax25_t1_timeout(ax25);
	}
}