void ax25_kick(ax25_cb *ax25)
{
struct sk_buff *skb, *skbn;
int last = 1;
unsigned short start, end, next;
if (ax25->state != AX25_STATE_3 && ax25->state != AX25_STATE_4)
return;
if (ax25->condition & AX25_COND_PEER_RX_BUSY)
return;
if (skb_peek(&ax25->write_queue) == NULL)
return;
start = (skb_peek(&ax25->ack_queue) == NULL) ? ax25->va : ax25->vs;
end = (ax25->va + ax25->window) % ax25->modulus;
if (start == end)
return;
/*
* Transmit data until either we're out of data to send or
* the window is full. Send a poll on the final I frame if
* the window is filled.
*/
/*
* Dequeue the frame and copy it.
* Check for race with ax25_clear_queues().
*/
skb = skb_dequeue(&ax25->write_queue);
if (!skb)
return;
ax25->vs = start;
do {
if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
skb_queue_head(&ax25->write_queue, skb);
break;
}
if (skb->sk != NULL)
skb_set_owner_w(skbn, skb->sk);
next = (ax25->vs + 1) % ax25->modulus;
last = (next == end);
/*
* Transmit the frame copy.
* bke 960114: do not set the Poll bit on the last frame
* in DAMA mode.
*/
switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
case AX25_PROTO_STD_SIMPLEX:
case AX25_PROTO_STD_DUPLEX:
ax25_send_iframe(ax25, skbn, (last) ? AX25_POLLON : AX25_POLLOFF);
break;
#ifdef CONFIG_AX25_DAMA_SLAVE
case AX25_PROTO_DAMA_SLAVE:
ax25_send_iframe(ax25, skbn, AX25_POLLOFF);
break;
#endif
}
ax25->vs = next;
/*
* Requeue the original data frame.
*/
skb_queue_tail(&ax25->ack_queue, skb);
} while (!last && (skb = skb_dequeue(&ax25->write_queue)) != NULL);
ax25->condition &= ~AX25_COND_ACK_PENDING;
if (!ax25_t1timer_running(ax25)) {
ax25_stop_t3timer(ax25);
ax25_calculate_t1(ax25);
ax25_start_t1timer(ax25);
}
}
void ax25_kick(ax25_cb *ax25)
{
struct sk_buff *skb, *skbn;
int last = 1;
unsigned short start, end, next;
del_timer(&ax25->timer);
start = (skb_peek(&ax25->ack_queue) == NULL) ? ax25->va : ax25->vs;
end = (ax25->va + ax25->window) % ax25->modulus;
if (!(ax25->condition & PEER_RX_BUSY_CONDITION) &&
start != end &&
skb_peek(&ax25->write_queue) != NULL) {
ax25->vs = start;
/*
* Transmit data until either we're out of data to send or
* the window is full. Send a poll on the final I frame if
* the window is filled.
*/
/*
* Dequeue the frame and copy it.
*/
skb = skb_dequeue(&ax25->write_queue);
do {
if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
skb_queue_head(&ax25->write_queue, skb);
break;
}
next = (ax25->vs + 1) % ax25->modulus;
#ifdef notdef
last = (next == end) || skb_peek(&ax25->write_queue) == NULL;
#else
last = (next == end);
#endif
/*
* Transmit the frame copy.
* bke 960114: do not set the Poll bit on the last frame
* in DAMA mode.
*/
ax25_send_iframe(ax25, skbn, (last && !ax25->dama_slave) ? POLLON : POLLOFF);
ax25->vs = next;
/*
* Requeue the original data frame.
*/
skb_queue_tail(&ax25->ack_queue, skb);
#ifdef notdef
} while (!last);
#else
} while (!last && (skb = skb_dequeue(&ax25->write_queue)) != NULL);
#endif
ax25->condition &= ~ACK_PENDING_CONDITION;
if (ax25->t1timer == 0) {
ax25->t3timer = 0;
ax25->t1timer = ax25->t1 = ax25_calculate_t1(ax25);
}
}
