(!IN_DEV_ROUTE_LOCALNET(in_dev) && ipv4_is_loopback(tip)))
goto out;
+ /*
+ * For some 802.11 wireless deployments (and possibly other networks),
+ * there will be an ARP proxy and gratuitous ARP frames are attacks
+ * and thus should not be accepted.
+ */
+ if (sip == tip && IN_DEV_ORCONF(in_dev, DROP_GRATUITOUS_ARP))
+ goto out;
+
/*
* Special case: We must set Frame Relay source Q.922 address
*/