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); }