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[ARP]: Fix arp reply when sender ip 0

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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: Jonas Danielsson <the.sator@gmail.com>
Acked-by: Alexey Kuznetov <kuznet@ms2.inr.ac.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jonas Danielsson 2007-11-20 17:38:16 -08:00 committed by David S. Miller
parent 77adefdc98
commit b4a9811c42
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/arp.c
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@ -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;
}