Beispiel #1
0
static void nr_idletimer_expiry(unsigned long param)
{
	struct sock *sk = (struct sock *)param;
	struct nr_sock *nr = nr_sk(sk);

	bh_lock_sock(sk);

	nr_clear_queues(sk);

	nr->n2count = 0;
	nr_write_internal(sk, NR_DISCREQ);
	nr->state = NR_STATE_2;

	nr_start_t1timer(sk);
	nr_stop_t2timer(sk);
	nr_stop_t4timer(sk);

	sk->sk_state     = TCP_CLOSE;
	sk->sk_err       = 0;
	sk->sk_shutdown |= SEND_SHUTDOWN;

	if (!sock_flag(sk, SOCK_DEAD)) {
		sk->sk_state_change(sk);
		sock_set_flag(sk, SOCK_DEAD);
	}
	bh_unlock_sock(sk);
}
Beispiel #2
0
void nr_establish_data_link(struct sock *sk)
{
	struct nr_sock *nr = nr_sk(sk);

	nr->condition = 0x00;
	nr->n2count   = 0;

	nr_write_internal(sk, NR_CONNREQ);

	nr_stop_t2timer(sk);
	nr_stop_t4timer(sk);
	nr_stop_idletimer(sk);
	nr_start_t1timer(sk);
}
Beispiel #3
0
void nr_check_iframes_acked(struct sock *sk, unsigned short nr)
{
	struct nr_sock *nrom = nr_sk(sk);

	if (nrom->vs == nr) {
		nr_frames_acked(sk, nr);
		nr_stop_t1timer(sk);
		nrom->n2count = 0;
	} else {
		if (nrom->va != nr) {
			nr_frames_acked(sk, nr);
			nr_start_t1timer(sk);
		}
	}
}
Beispiel #4
0
static void nr_t1timer_expiry(unsigned long param)
{
	struct sock *sk = (struct sock *)param;
	struct nr_sock *nr = nr_sk(sk);

	bh_lock_sock(sk);
	switch (nr->state) {
	case NR_STATE_1:
		if (nr->n2count == nr->n2) {
			nr_disconnect(sk, ETIMEDOUT);
			bh_unlock_sock(sk);
			return;
		} else {
			nr->n2count++;
			nr_write_internal(sk, NR_CONNREQ);
		}
		break;

	case NR_STATE_2:
		if (nr->n2count == nr->n2) {
			nr_disconnect(sk, ETIMEDOUT);
			bh_unlock_sock(sk);
			return;
		} else {
			nr->n2count++;
			nr_write_internal(sk, NR_DISCREQ);
		}
		break;

	case NR_STATE_3:
		if (nr->n2count == nr->n2) {
			nr_disconnect(sk, ETIMEDOUT);
			bh_unlock_sock(sk);
			return;
		} else {
			nr->n2count++;
			nr_requeue_frames(sk);
		}
		break;
	}

	nr_start_t1timer(sk);
	bh_unlock_sock(sk);
}
Beispiel #5
0
static void nr_idletimer_expiry(unsigned long param)
{
	struct sock *sk = (struct sock *)param;

	nr_clear_queues(sk);

	sk->protinfo.nr->n2count = 0;
	nr_write_internal(sk, NR_DISCREQ);
	sk->protinfo.nr->state = NR_STATE_2;

	nr_start_t1timer(sk);
	nr_stop_t2timer(sk);
	nr_stop_t4timer(sk);

	sk->state     = TCP_CLOSE;
	sk->err       = 0;
	sk->shutdown |= SEND_SHUTDOWN;

	if (!sk->dead)
		sk->state_change(sk);

	sk->dead = 1;
}
Beispiel #6
0
void nr_kick(struct sock *sk)
{
	struct nr_sock *nr = nr_sk(sk);
	struct sk_buff *skb, *skbn;
	unsigned short start, end;

	if (nr->state != NR_STATE_3)
		return;

	if (nr->condition & NR_COND_PEER_RX_BUSY)
		return;

	if (!skb_peek(&sk->sk_write_queue))
		return;

	start = (skb_peek(&nr->ack_queue) == NULL) ? nr->va : nr->vs;
	end   = (nr->va + nr->window) % NR_MODULUS;

	if (start == end)
		return;

	nr->vs = start;

	/*
	 * Transmit data until either we're out of data to send or
	 * the window is full.
	 */

	/*
	 * Dequeue the frame and copy it.
	 */
	skb = skb_dequeue(&sk->sk_write_queue);

	do {
		if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
			skb_queue_head(&sk->sk_write_queue, skb);
			break;
		}

		skb_set_owner_w(skbn, sk);

		/*
		 * Transmit the frame copy.
		 */
		nr_send_iframe(sk, skbn);

		nr->vs = (nr->vs + 1) % NR_MODULUS;

		/*
		 * Requeue the original data frame.
		 */
		skb_queue_tail(&nr->ack_queue, skb);

	} while (nr->vs != end &&
		 (skb = skb_dequeue(&sk->sk_write_queue)) != NULL);

	nr->vl         = nr->vr;
	nr->condition &= ~NR_COND_ACK_PENDING;

	if (!nr_t1timer_running(sk))
		nr_start_t1timer(sk);
}