static void nr_heartbeat_expiry(unsigned long param)
{
struct sock *sk = (struct sock *)param;
switch (sk->protinfo.nr->state) {
case NR_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 (sk->destroy || (sk->state == TCP_LISTEN && sk->dead)) {
nr_destroy_socket(sk);
return;
}
break;
case NR_STATE_3:
/*
* Check for the state of the receive buffer.
*/
if (atomic_read(&sk->rmem_alloc) < (sk->rcvbuf / 2) &&
(sk->protinfo.nr->condition & NR_COND_OWN_RX_BUSY)) {
sk->protinfo.nr->condition &= ~NR_COND_OWN_RX_BUSY;
sk->protinfo.nr->condition &= ~NR_COND_ACK_PENDING;
sk->protinfo.nr->vl = sk->protinfo.nr->vr;
nr_write_internal(sk, NR_INFOACK);
break;
}
break;
}
nr_start_heartbeat(sk);
}
static void nr_heartbeat_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_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 (sock_flag(sk, SOCK_DESTROY) ||
(sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) {
sock_hold(sk);
bh_unlock_sock(sk);
nr_destroy_socket(sk);
sock_put(sk);
return;
}
break;
case NR_STATE_3:
/*
* Check for the state of the receive buffer.
*/
if (atomic_read(&sk->sk_rmem_alloc) < (sk->sk_rcvbuf / 2) &&
(nr->condition & NR_COND_OWN_RX_BUSY)) {
nr->condition &= ~NR_COND_OWN_RX_BUSY;
nr->condition &= ~NR_COND_ACK_PENDING;
nr->vl = nr->vr;
nr_write_internal(sk, NR_INFOACK);
break;
}
break;
}
nr_start_heartbeat(sk);
bh_unlock_sock(sk);
}
/*
* NET/ROM TIMER
*
* This routine is called every 100ms. Decrement timer by this
* amount - if expired then process the event.
*/
static void nr_timer(unsigned long param)
{
struct sock *sk = (struct sock *)param;
switch (sk->protinfo.nr->state) {
case NR_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 (sk->destroy || (sk->state == TCP_LISTEN && sk->dead)) {
del_timer(&sk->timer);
nr_destroy_socket(sk);
return;
}
break;
case NR_STATE_3:
/*
* Check for the state of the receive buffer.
*/
if (sk->rmem_alloc < (sk->rcvbuf / 2) && (sk->protinfo.nr->condition & NR_COND_OWN_RX_BUSY)) {
sk->protinfo.nr->condition &= ~NR_COND_OWN_RX_BUSY;
sk->protinfo.nr->condition &= ~NR_COND_ACK_PENDING;
sk->protinfo.nr->vl = sk->protinfo.nr->vr;
nr_write_internal(sk, NR_INFOACK);
break;
}
/*
* Check for frames to transmit.
*/
nr_kick(sk);
break;
default:
break;
}
if (sk->protinfo.nr->t2timer > 0 && --sk->protinfo.nr->t2timer == 0) {
if (sk->protinfo.nr->state == NR_STATE_3) {
if (sk->protinfo.nr->condition & NR_COND_ACK_PENDING) {
sk->protinfo.nr->condition &= ~NR_COND_ACK_PENDING;
nr_enquiry_response(sk);
}
}
}
if (sk->protinfo.nr->t4timer > 0 && --sk->protinfo.nr->t4timer == 0) {
sk->protinfo.nr->condition &= ~NR_COND_PEER_RX_BUSY;
}
if (sk->protinfo.nr->t1timer == 0 || --sk->protinfo.nr->t1timer > 0) {
nr_set_timer(sk);
return;
}
switch (sk->protinfo.nr->state) {
case NR_STATE_1:
if (sk->protinfo.nr->n2count == sk->protinfo.nr->n2) {
nr_clear_queues(sk);
sk->protinfo.nr->state = NR_STATE_0;
sk->state = TCP_CLOSE;
sk->err = ETIMEDOUT;
sk->shutdown |= SEND_SHUTDOWN;
if (!sk->dead)
sk->state_change(sk);
sk->dead = 1;
} else {
sk->protinfo.nr->n2count++;
nr_write_internal(sk, NR_CONNREQ);
}
break;
case NR_STATE_2:
if (sk->protinfo.nr->n2count == sk->protinfo.nr->n2) {
nr_clear_queues(sk);
sk->protinfo.nr->state = NR_STATE_0;
sk->state = TCP_CLOSE;
sk->err = ETIMEDOUT;
sk->shutdown |= SEND_SHUTDOWN;
if (!sk->dead)
sk->state_change(sk);
sk->dead = 1;
} else {
sk->protinfo.nr->n2count++;
nr_write_internal(sk, NR_DISCREQ);
}
break;
case NR_STATE_3:
if (sk->protinfo.nr->n2count == sk->protinfo.nr->n2) {
nr_clear_queues(sk);
sk->protinfo.nr->state = NR_STATE_0;
sk->state = TCP_CLOSE;
sk->err = ETIMEDOUT;
sk->shutdown |= SEND_SHUTDOWN;
if (!sk->dead)
sk->state_change(sk);
sk->dead = 1;
} else {
sk->protinfo.nr->n2count++;
nr_requeue_frames(sk);
}
break;
}
sk->protinfo.nr->t1timer = sk->protinfo.nr->t1;
nr_set_timer(sk);
}
