int arp_find(unsigned char *haddr, struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
__be32 paddr;
struct neighbour *n;
if (!skb->dst) {
printk(KERN_DEBUG "arp_find is called with dst==NULL\n");
kfree_skb(skb);
return 1;
}
paddr = skb->rtable->rt_gateway;
if (arp_set_predefined(inet_addr_type(dev_net(dev), paddr), haddr, paddr, dev))
return 0;
n = __neigh_lookup(&arp_tbl, &paddr, dev, 1);
if (n) {
n->used = jiffies;
if (n->nud_state&NUD_VALID || neigh_event_send(n, skb) == 0) {
read_lock_bh(&n->lock);
memcpy(haddr, n->ha, dev->addr_len);
read_unlock_bh(&n->lock);
neigh_release(n);
return 0;
}
neigh_release(n);
} else
kfree_skb(skb);
return 1;
}
int arp_find(unsigned char *haddr, struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
__be32 paddr;
struct neighbour *n;
if (!skb_dst(skb)) {
pr_debug("arp_find is called with dst==NULL\n");
kfree_skb(skb);
return 1;
}
paddr = rt_nexthop(skb_rtable(skb), ip_hdr(skb)->daddr);
if (arp_set_predefined(inet_addr_type(dev_net(dev), paddr), haddr,
paddr, dev))
return 0;
n = __neigh_lookup(&arp_tbl, &paddr, dev, 1);
if (n) {
n->used = jiffies;
if (n->nud_state & NUD_VALID || neigh_event_send(n, skb) == 0) {
neigh_ha_snapshot(haddr, n, dev);
neigh_release(n);
return 0;
}
neigh_release(n);
} else
kfree_skb(skb);
return 1;
}