/* * Caller is holding rose_neigh_list_lock. */ static void rose_remove_neigh(struct rose_neigh *rose_neigh) { struct rose_neigh *s; rose_stop_ftimer(rose_neigh); rose_stop_t0timer(rose_neigh); skb_queue_purge(&rose_neigh->queue); spin_lock_bh(&rose_neigh_list_lock); if ((s = rose_neigh_list) == rose_neigh) { rose_neigh_list = rose_neigh->next; spin_unlock_bh(&rose_neigh_list_lock); if (rose_neigh->digipeat != NULL) kfree(rose_neigh->digipeat); kfree(rose_neigh); return; } while (s != NULL && s->next != NULL) { if (s->next == rose_neigh) { s->next = rose_neigh->next; spin_unlock_bh(&rose_neigh_list_lock); if (rose_neigh->digipeat != NULL) kfree(rose_neigh->digipeat); kfree(rose_neigh); return; } s = s->next; } spin_unlock_bh(&rose_neigh_list_lock); }
static void rose_remove_neigh(struct rose_neigh *rose_neigh) { struct rose_neigh *s; unsigned long flags; struct sk_buff *skb; rose_stop_ftimer(rose_neigh); rose_stop_t0timer(rose_neigh); while ((skb = skb_dequeue(&rose_neigh->queue)) != NULL) kfree_skb(skb); save_flags(flags); cli(); if ((s = rose_neigh_list) == rose_neigh) { rose_neigh_list = rose_neigh->next; restore_flags(flags); if (rose_neigh->digipeat != NULL) kfree(rose_neigh->digipeat); kfree(rose_neigh); return; } while (s != NULL && s->next != NULL) { if (s->next == rose_neigh) { s->next = rose_neigh->next; restore_flags(flags); if (rose_neigh->digipeat != NULL) kfree(rose_neigh->digipeat); kfree(rose_neigh); return; } s = s->next; } restore_flags(flags); }
/* * Route a frame to an appropriate AX.25 connection. */ int rose_route_frame(struct sk_buff *skb, ax25_cb *ax25) { struct rose_neigh *rose_neigh, *new_neigh; struct rose_route *rose_route; struct rose_facilities_struct facilities; rose_address *src_addr, *dest_addr; struct sock *sk; unsigned short frametype; unsigned int lci, new_lci; unsigned char cause, diagnostic; struct net_device *dev; int len, res = 0; #if 0 if (call_in_firewall(PF_ROSE, skb->dev, skb->data, NULL, &skb) != FW_ACCEPT) return res; #endif frametype = skb->data[2]; lci = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF); src_addr = (rose_address *)(skb->data + 9); dest_addr = (rose_address *)(skb->data + 4); spin_lock_bh(&rose_node_list_lock); spin_lock_bh(&rose_neigh_list_lock); spin_lock_bh(&rose_route_list_lock); rose_neigh = rose_neigh_list; while (rose_neigh != NULL) { if (ax25cmp(&ax25->dest_addr, &rose_neigh->callsign) == 0 && ax25->ax25_dev->dev == rose_neigh->dev) break; rose_neigh = rose_neigh->next; } if (rose_neigh == NULL) { printk("rose_route : unknown neighbour or device %s\n", ax2asc(&ax25->dest_addr)); goto out; } /* * Obviously the link is working, halt the ftimer. */ rose_stop_ftimer(rose_neigh); /* * LCI of zero is always for us, and its always a restart * frame. */ if (lci == 0) { rose_link_rx_restart(skb, rose_neigh, frametype); goto out; } /* * Find an existing socket. */ if ((sk = rose_find_socket(lci, rose_neigh)) != NULL) { if (frametype == ROSE_CALL_REQUEST) { struct rose_sock *rose = rose_sk(sk); /* Remove an existing unused socket */ rose_clear_queues(sk); rose->cause = ROSE_NETWORK_CONGESTION; rose->diagnostic = 0; rose->neighbour->use--; rose->neighbour = NULL; rose->lci = 0; rose->state = ROSE_STATE_0; 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); } } else { skb->h.raw = skb->data; res = rose_process_rx_frame(sk, skb); goto out; } } /* * Is is a Call Request and is it for us ? */ if (frametype == ROSE_CALL_REQUEST) if ((dev = rose_dev_get(dest_addr)) != NULL) { res = rose_rx_call_request(skb, dev, rose_neigh, lci); dev_put(dev); goto out; } if (!sysctl_rose_routing_control) { rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 0); goto out; } /* * Route it to the next in line if we have an entry for it. */ rose_route = rose_route_list; while (rose_route != NULL) { if (rose_route->lci1 == lci && rose_route->neigh1 == rose_neigh) { if (frametype == ROSE_CALL_REQUEST) { /* F6FBB - Remove an existing unused route */ rose_remove_route(rose_route); break; } else if (rose_route->neigh2 != NULL) { skb->data[0] &= 0xF0; skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F; skb->data[1] = (rose_route->lci2 >> 0) & 0xFF; rose_transmit_link(skb, rose_route->neigh2); if (frametype == ROSE_CLEAR_CONFIRMATION) rose_remove_route(rose_route); res = 1; goto out; } else { if (frametype == ROSE_CLEAR_CONFIRMATION) rose_remove_route(rose_route); goto out; } }