diff options
Diffstat (limited to 'net/ipv4/arp.c')
| -rw-r--r-- | net/ipv4/arp.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index ce6fbdfd40b..fea4929f620 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -321,7 +321,7 @@ static void arp_error_report(struct neighbour *neigh, struct sk_buff *skb) static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb) { __be32 saddr = 0; - u8 *dst_ha = NULL; + u8 dst_ha[MAX_ADDR_LEN], *dst_hw = NULL; struct net_device *dev = neigh->dev; __be32 target = *(__be32 *)neigh->primary_key; int probes = atomic_read(&neigh->probes); @@ -363,8 +363,8 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb) if (probes < 0) { if (!(neigh->nud_state & NUD_VALID)) pr_debug("trying to ucast probe in NUD_INVALID\n"); - dst_ha = neigh->ha; - read_lock_bh(&neigh->lock); + neigh_ha_snapshot(dst_ha, neigh, dev); + dst_hw = dst_ha; } else { probes -= neigh->parms->app_probes; if (probes < 0) { @@ -376,9 +376,7 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb) } arp_send(ARPOP_REQUEST, ETH_P_ARP, target, dev, saddr, - dst_ha, dev->dev_addr, NULL); - if (dst_ha) - read_unlock_bh(&neigh->lock); + dst_hw, dev->dev_addr, NULL); } static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip) @@ -930,24 +928,25 @@ static void parp_redo(struct sk_buff *skb) static int arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { - struct arphdr *arp; + const struct arphdr *arp; + + if (dev->flags & IFF_NOARP || + skb->pkt_type == PACKET_OTHERHOST || + skb->pkt_type == PACKET_LOOPBACK) + goto freeskb; + + skb = skb_share_check(skb, GFP_ATOMIC); + if (!skb) + goto out_of_mem; /* ARP header, plus 2 device addresses, plus 2 IP addresses. */ if (!pskb_may_pull(skb, arp_hdr_len(dev))) goto freeskb; arp = arp_hdr(skb); - if (arp->ar_hln != dev->addr_len || - dev->flags & IFF_NOARP || - skb->pkt_type == PACKET_OTHERHOST || - skb->pkt_type == PACKET_LOOPBACK || - arp->ar_pln != 4) + if (arp->ar_hln != dev->addr_len || arp->ar_pln != 4) goto freeskb; - skb = skb_share_check(skb, GFP_ATOMIC); - if (skb == NULL) - goto out_of_mem; - memset(NEIGH_CB(skb), 0, sizeof(struct neighbour_cb)); return NF_HOOK(NFPROTO_ARP, NF_ARP_IN, skb, dev, NULL, arp_process); @@ -1406,14 +1405,14 @@ static const struct file_operations arp_seq_fops = { static int __net_init arp_net_init(struct net *net) { - if (!proc_net_fops_create(net, "arp", S_IRUGO, &arp_seq_fops)) + if (!proc_create("arp", S_IRUGO, net->proc_net, &arp_seq_fops)) return -ENOMEM; return 0; } static void __net_exit arp_net_exit(struct net *net) { - proc_net_remove(net, "arp"); + remove_proc_entry("arp", net->proc_net); } static struct pernet_operations arp_net_ops = { |