rcu_read_lock();
in_dev = __in_dev_get_rcu(dev);
- if (in_dev == NULL) {
+ if (!in_dev) {
rcu_read_unlock();
return -EINVAL;
}
*/
/*
- * Create an arp packet. If (dest_hw == NULL), we create a broadcast
+ * Create an arp packet. If dest_hw is not set, we create a broadcast
* message.
*/
struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
*/
skb = alloc_skb(arp_hdr_len(dev) + hlen + tlen, GFP_ATOMIC);
- if (skb == NULL)
+ if (!skb)
return NULL;
skb_reserve(skb, hlen);
arp = (struct arphdr *) skb_put(skb, arp_hdr_len(dev));
skb->dev = dev;
skb->protocol = htons(ETH_P_ARP);
- if (src_hw == NULL)
+ if (!src_hw)
src_hw = dev->dev_addr;
- if (dest_hw == NULL)
+ if (!dest_hw)
dest_hw = dev->broadcast;
/*
break;
#endif
default:
- if (target_hw != NULL)
+ if (target_hw)
memcpy(arp_ptr, target_hw, dev->addr_len);
else
memset(arp_ptr, 0, dev->addr_len);
void arp_xmit(struct sk_buff *skb)
{
/* Send it off, maybe filter it using firewalling first. */
- NF_HOOK(NFPROTO_ARP, NF_ARP_OUT, skb, NULL, skb->dev, dev_queue_xmit);
+ NF_HOOK(NFPROTO_ARP, NF_ARP_OUT, NULL, skb,
+ NULL, skb->dev, dev_queue_xmit_sk);
}
EXPORT_SYMBOL(arp_xmit);
skb = arp_create(type, ptype, dest_ip, dev, src_ip,
dest_hw, src_hw, target_hw);
- if (skb == NULL)
+ if (!skb)
return;
arp_xmit(skb);
* Process an arp request.
*/
-static int arp_process(struct sk_buff *skb)
+static int arp_process(struct sock *sk, struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
struct in_device *in_dev = __in_dev_get_rcu(dev);
* is ARP'able.
*/
- if (in_dev == NULL)
+ if (!in_dev)
goto out;
arp = arp_hdr(skb);
is_garp = arp->ar_op == htons(ARPOP_REQUEST) && tip == sip &&
inet_addr_type(net, sip) == RTN_UNICAST;
- if (n == NULL &&
+ if (!n &&
((arp->ar_op == htons(ARPOP_REPLY) &&
inet_addr_type(net, sip) == RTN_UNICAST) || is_garp))
n = __neigh_lookup(&arp_tbl, &sip, dev, 1);
static void parp_redo(struct sk_buff *skb)
{
- arp_process(skb);
+ arp_process(NULL, skb);
}
memset(NEIGH_CB(skb), 0, sizeof(struct neighbour_cb));
- return NF_HOOK(NFPROTO_ARP, NF_ARP_IN, skb, dev, NULL, arp_process);
+ return NF_HOOK(NFPROTO_ARP, NF_ARP_IN, NULL, skb,
+ dev, NULL, arp_process);
consumeskb:
consume_skb(skb);
static int arp_req_set_proxy(struct net *net, struct net_device *dev, int on)
{
- if (dev == NULL) {
+ if (!dev) {
IPV4_DEVCONF_ALL(net, PROXY_ARP) = on;
return 0;
}
return -ENODEV;
}
if (mask) {
- if (pneigh_lookup(&arp_tbl, net, &ip, dev, 1) == NULL)
+ if (!pneigh_lookup(&arp_tbl, net, &ip, dev, 1))
return -ENOBUFS;
return 0;
}
ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
if (r->arp_flags & ATF_PERM)
r->arp_flags |= ATF_COM;
- if (dev == NULL) {
+ if (!dev) {
struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0);
if (IS_ERR(rt))
return arp_req_delete_public(net, r, dev);
ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
- if (dev == NULL) {
+ if (!dev) {
struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0);
if (IS_ERR(rt))
return PTR_ERR(rt);
if (r.arp_dev[0]) {
err = -ENODEV;
dev = __dev_get_by_name(net, r.arp_dev);
- if (dev == NULL)
+ if (!dev)
goto out;
/* Mmmm... It is wrong... ARPHRD_NETROM==0 */