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); }
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); }
void nr_disconnect(struct sock *sk, int reason) { nr_stop_t1timer(sk); nr_stop_t2timer(sk); nr_stop_t4timer(sk); nr_stop_idletimer(sk); nr_clear_queues(sk); nr_sk(sk)->state = NR_STATE_0; sk->sk_state = TCP_CLOSE; sk->sk_err = reason; sk->sk_shutdown |= SEND_SHUTDOWN; if (!sock_flag(sk, SOCK_DEAD)) { sk->sk_state_change(sk); sock_set_flag(sk, SOCK_DEAD); } }
void nr_disconnect(struct sock *sk, int reason) { nr_stop_t1timer(sk); nr_stop_t2timer(sk); nr_stop_t4timer(sk); nr_stop_idletimer(sk); nr_clear_queues(sk); sk->protinfo.nr->state = NR_STATE_0; sk->state = TCP_CLOSE; sk->err = reason; sk->shutdown |= SEND_SHUTDOWN; if (!sk->dead) sk->state_change(sk); sk->dead = 1; }
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; }
/* * State machine for state 3, Connected State. * The handling of the timer(s) is in file nr_timer.c * Handling of state 0 and connection release is in netrom.c. */ static int nr_state3_machine(struct sock *sk, struct sk_buff *skb, int frametype) { struct nr_sock *nrom = nr_sk(sk); struct sk_buff_head temp_queue; struct sk_buff *skbn; unsigned short save_vr; unsigned short nr, ns; int queued = 0; nr = skb->data[18]; ns = skb->data[17]; switch (frametype) { case NR_CONNREQ: nr_write_internal(sk, NR_CONNACK); break; case NR_DISCREQ: nr_write_internal(sk, NR_DISCACK); nr_disconnect(sk, 0); break; case NR_CONNACK | NR_CHOKE_FLAG: case NR_DISCACK: nr_disconnect(sk, ECONNRESET); break; case NR_INFOACK: case NR_INFOACK | NR_CHOKE_FLAG: case NR_INFOACK | NR_NAK_FLAG: case NR_INFOACK | NR_NAK_FLAG | NR_CHOKE_FLAG: if (frametype & NR_CHOKE_FLAG) { nrom->condition |= NR_COND_PEER_RX_BUSY; nr_start_t4timer(sk); } else { nrom->condition &= ~NR_COND_PEER_RX_BUSY; nr_stop_t4timer(sk); } if (!nr_validate_nr(sk, nr)) { break; } if (frametype & NR_NAK_FLAG) { nr_frames_acked(sk, nr); nr_send_nak_frame(sk); } else { if (nrom->condition & NR_COND_PEER_RX_BUSY) { nr_frames_acked(sk, nr); } else { nr_check_iframes_acked(sk, nr); } } break; case NR_INFO: case NR_INFO | NR_NAK_FLAG: case NR_INFO | NR_CHOKE_FLAG: case NR_INFO | NR_MORE_FLAG: case NR_INFO | NR_NAK_FLAG | NR_CHOKE_FLAG: case NR_INFO | NR_CHOKE_FLAG | NR_MORE_FLAG: case NR_INFO | NR_NAK_FLAG | NR_MORE_FLAG: case NR_INFO | NR_NAK_FLAG | NR_CHOKE_FLAG | NR_MORE_FLAG: if (frametype & NR_CHOKE_FLAG) { nrom->condition |= NR_COND_PEER_RX_BUSY; nr_start_t4timer(sk); } else { nrom->condition &= ~NR_COND_PEER_RX_BUSY; nr_stop_t4timer(sk); } if (nr_validate_nr(sk, nr)) { if (frametype & NR_NAK_FLAG) { nr_frames_acked(sk, nr); nr_send_nak_frame(sk); } else { if (nrom->condition & NR_COND_PEER_RX_BUSY) { nr_frames_acked(sk, nr); } else { nr_check_iframes_acked(sk, nr); } } } queued = 1; skb_queue_head(&nrom->reseq_queue, skb); if (nrom->condition & NR_COND_OWN_RX_BUSY) break; skb_queue_head_init(&temp_queue); do { save_vr = nrom->vr; while ((skbn = skb_dequeue(&nrom->reseq_queue)) != NULL) { ns = skbn->data[17]; if (ns == nrom->vr) { if (nr_queue_rx_frame(sk, skbn, frametype & NR_MORE_FLAG) == 0) { nrom->vr = (nrom->vr + 1) % NR_MODULUS; } else { nrom->condition |= NR_COND_OWN_RX_BUSY; skb_queue_tail(&temp_queue, skbn); } } else if (nr_in_rx_window(sk, ns)) { skb_queue_tail(&temp_queue, skbn); } else { kfree_skb(skbn); } } while ((skbn = skb_dequeue(&temp_queue)) != NULL) { skb_queue_tail(&nrom->reseq_queue, skbn); } } while (save_vr != nrom->vr); /* * Window is full, ack it immediately. */ if (((nrom->vl + nrom->window) % NR_MODULUS) == nrom->vr) { nr_enquiry_response(sk); } else { if (!(nrom->condition & NR_COND_ACK_PENDING)) { nrom->condition |= NR_COND_ACK_PENDING; nr_start_t2timer(sk); } } break; case NR_RESET: if (sysctl_netrom_reset_circuit) nr_disconnect(sk, ECONNRESET); break; default: break; } return queued; }