コード例 #1
0
void x25_kick(struct sock *sk)
{
	struct sk_buff *skb, *skbn;
	unsigned short start, end;
	int modulus;
	struct x25_sock *x25 = x25_sk(sk);

	if (x25->state != X25_STATE_3)
		return;

	if (skb_peek(&x25->interrupt_out_queue) != NULL &&
		!test_and_set_bit(X25_INTERRUPT_FLAG, &x25->flags)) {

		skb = skb_dequeue(&x25->interrupt_out_queue);
		x25_transmit_link(skb, x25->neighbour);
	}

	if (x25->condition & X25_COND_PEER_RX_BUSY)
		return;

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

	modulus = x25->neighbour->extended ? X25_EMODULUS : X25_SMODULUS;

	start   = skb_peek(&x25->ack_queue) ? x25->vs : x25->va;
	end     = (x25->va + x25->facilities.winsize_out) % modulus;

	if (start == end)
		return;

	x25->vs = start;


	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);

		x25_send_iframe(sk, skbn);

		x25->vs = (x25->vs + 1) % modulus;

		skb_queue_tail(&x25->ack_queue, skb);

	} while (x25->vs != end &&
		 (skb = skb_dequeue(&sk->sk_write_queue)) != NULL);

	x25->vl         = x25->vr;
	x25->condition &= ~X25_COND_ACK_PENDING;

	x25_stop_timer(sk);
}
コード例 #2
0
void x25_kick(struct sock *sk)
{
	struct sk_buff *skb, *skbn;
	unsigned short start, end;
	int modulus;
	struct x25_opt *x25 = x25_sk(sk);

	if (x25->state != X25_STATE_3)
		return;

	/*
	 *	Transmit interrupt data.
	 */
	if (!x25->intflag && skb_peek(&x25->interrupt_out_queue) != NULL) {
		x25->intflag = 1;
		skb = skb_dequeue(&x25->interrupt_out_queue);
		x25_transmit_link(skb, x25->neighbour);
	}

	if (x25->condition & X25_COND_PEER_RX_BUSY)
		return;

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

	modulus = x25->neighbour->extended ? X25_EMODULUS : X25_SMODULUS;

	start   = skb_peek(&x25->ack_queue) ? x25->vs : x25->va;
	end     = (x25->va + x25->facilities.winsize_out) % modulus;

	if (start == end)
		return;

	x25->vs = start;

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

	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.
		 */
		x25_send_iframe(sk, skbn);

		x25->vs = (x25->vs + 1) % modulus;

		/*
		 * Requeue the original data frame.
		 */
		skb_queue_tail(&x25->ack_queue, skb);

	} while (x25->vs != end &&
		 (skb = skb_dequeue(&sk->sk_write_queue)) != NULL);

	x25->vl         = x25->vr;
	x25->condition &= ~X25_COND_ACK_PENDING;

	x25_stop_timer(sk);
}