Messages in this thread Patch in this message | | | From | "Leech, Christopher" <> | Subject | [PATCH] interface checking ARP | Date | Mon, 23 Aug 1999 08:49:18 -0700 |
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After the discussions in the "ARP (mis)behavior" thread I decided to go ahead and try to change the ARP behavior. It was easier than I expected, this patch forces ARP requests to be ignored unless they are received on an interface configured to the target IP. I'd be interested to hear if this creates any problems - it seems to work well for me.
diff -u linux/net/ipv4/arp.c linux/net/ipv4/arp.new.c --- linux/net/ipv4/arp.c Mon Aug 9 12:04:41 1999 +++ linux/net/ipv4/arp.new.c Mon Aug 23 08:28:24 1999 @@ -655,7 +655,8 @@ } if (arp->ar_op == __constant_htons(ARPOP_REQUEST) && - ip_route_input(skb, tip, sip, 0, dev) == 0) { + ip_route_input(skb, tip, sip, 0, dev) == 0 && + dev == ip_dev_find(tip)) { rt = (struct rtable*)skb->dst; addr_type = rt->rt_type;
Chris Leech Intel Corporation christopher.leech@intel.com
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