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Commit b4a9811c authored by Jonas Danielsson's avatar Jonas Danielsson Committed by David S. Miller
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[ARP]: Fix arp reply when sender ip 0 



Fix arp reply when received arp probe with sender ip 0.

Send arp reply with target ip address 0.0.0.0 and target hardware
address set to hardware address of requester. Previously sent reply
with target ip address and target hardware address set to same as
source fields.

Signed-off-by: default avatarJonas Danielsson <the.sator@gmail.com>
Acked-by: default avatarAlexey Kuznetov <kuznet@ms2.inr.ac.ru>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 77adefdc

net/ipv4/arp.c

+2 −1
Original line number Diff line number Diff line
@@ -828,7 +828,8 @@ static int arp_process(struct sk_buff *skb) 
		if (arp->ar_op == htons(ARPOP_REQUEST) &&

		    inet_addr_type(tip) == RTN_LOCAL &&

		    !arp_ignore(in_dev,dev,sip,tip))

			arp_send(ARPOP_REPLY,ETH_P_ARP,tip,dev,tip,sha,dev->dev_addr,dev->dev_addr);

			arp_send(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,

				 dev->dev_addr, sha);

		goto out;

	}