if (frametype != ROSE_CALL_REQUEST)	/* XXX */ return 0; 
if (frametype != ROSE_CALL_REQUEST) {	/* XXX */ ret = 0; goto out; } 
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;			}		}		if (rose_route->lci2 == lci &&		    rose_route->neigh2 == rose_neigh) {			if (frametype == ROSE_CALL_REQUEST) {				/* F6FBB - Remove an existing unused route */				rose_remove_route(rose_route);				break;			} else if (rose_route->neigh1 != NULL) {				skb->data[0] &= 0xF0;				skb->data[0] |= (rose_route->lci1 >> 8) & 0x0F;				skb->data[1]  = (rose_route->lci1 >> 0) & 0xFF;				rose_transmit_link(skb, rose_route->neigh1);				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;			}		}		rose_route = rose_route->next;	}	/*	 *	We know that:	 *	1. The frame isn't for us,	 *	2. It isn't "owned" by any existing route.	 */	if (frametype != ROSE_CALL_REQUEST)	/* XXX */		return 0;	len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;	len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;	memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));	if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {		rose_transmit_clear_request(rose_neigh, lci, ROSE_INVALID_FACILITY, 76);		goto out;	}	/*	 *	Check for routing loops.	 */	rose_route = rose_route_list;	while (rose_route != NULL) {		if (rose_route->rand == facilities.rand &&		    rosecmp(src_addr, &rose_route->src_addr) == 0 &&		    ax25cmp(&facilities.dest_call, &rose_route->src_call) == 0 &&		    ax25cmp(&facilities.source_call, &rose_route->dest_call) == 0) {			rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 120);			goto out;		}		rose_route = rose_route->next;	}	if ((new_neigh = rose_get_neigh(dest_addr, &cause, &diagnostic)) == NULL) {		rose_transmit_clear_request(rose_neigh, lci, cause, diagnostic);		goto out;	}	if ((new_lci = rose_new_lci(new_neigh)) == 0) {		rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 71);		goto out;	}	if ((rose_route = kmalloc(sizeof(*rose_route), GFP_ATOMIC)) == NULL) {		rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 120);		goto out;	}	rose_route->lci1      = lci;	rose_route->src_addr  = *src_addr;	rose_route->dest_addr = *dest_addr;	rose_route->src_call  = facilities.dest_call;	rose_route->dest_call = facilities.source_call;	rose_route->rand      = facilities.rand;	rose_route->neigh1    = rose_neigh;	rose_route->lci2      = new_lci;	rose_route->neigh2    = new_neigh;	rose_route->neigh1->use++;	rose_route->neigh2->use++;	rose_route->next = rose_route_list;	rose_route_list  = rose_route;	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);	res = 1;out:	spin_unlock_bh(&rose_route_list_lock);	spin_unlock_bh(&rose_neigh_list_lock);	spin_unlock_bh(&rose_node_list_lock);	return res;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/dc16aaf29d64b8c5e0b88f49a4d541edf5b61e42/rose_route.c/buggy/net/rose/rose_route.c