Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi...

[cascardo/linux.git] / net / ipv4 / arp.c

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 5bf408b..1a9b99e 100644 (file)
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -732,6 +732,7 @@ static int arp_process(struct sk_buff *skb)
        int addr_type;
        struct neighbour *n;
        struct net *net = dev_net(dev);
+       bool is_garp = false;
 
        /* arp_rcv below verifies the ARP header and verifies the device
         * is ARP'able.
@@ -898,10 +899,12 @@ static int arp_process(struct sk_buff *skb)
                   It is possible, that this option should be enabled for some
                   devices (strip is candidate)
                 */
+               is_garp = arp->ar_op == htons(ARPOP_REQUEST) && tip == sip &&
+                         inet_addr_type(net, sip) == RTN_UNICAST;
+
                if (n == NULL &&
-                   (arp->ar_op == htons(ARPOP_REPLY) ||
-                    (arp->ar_op == htons(ARPOP_REQUEST) && tip == sip)) &&
-                   inet_addr_type(net, sip) == RTN_UNICAST)
+                   ((arp->ar_op == htons(ARPOP_REPLY)  &&
+                     inet_addr_type(net, sip) == RTN_UNICAST) || is_garp))
                        n = __neigh_lookup(&arp_tbl, &sip, dev, 1);
        }
 
@@ -914,8 +917,10 @@ static int arp_process(struct sk_buff *skb)
                   agents are active. Taking the first reply prevents
                   arp trashing and chooses the fastest router.
                 */
-               override = time_after(jiffies, n->updated +
-                                              NEIGH_VAR(n->parms, LOCKTIME));
+               override = time_after(jiffies,
+                                     n->updated +
+                                     NEIGH_VAR(n->parms, LOCKTIME)) ||
+                          is_garp;
 
                /* Broadcast replies and request packets
                   do not assert neighbour reachability.