diff options
| -rw-r--r-- | net/ipv4/arp.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index 9c220323f353..f11931c18381 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -801,8 +801,11 @@ static int arp_process(struct sk_buff *skb) * cache. */ - /* Special case: IPv4 duplicate address detection packet (RFC2131) */ - if (sip == 0) { + /* + * Special case: IPv4 duplicate address detection packet (RFC2131) + * and Gratuitous ARP/ARP Announce. (RFC3927, Section 2.4) + */ + if (sip == 0 || tip == sip) { if (arp->ar_op == htons(ARPOP_REQUEST) && inet_addr_type(net, tip) == RTN_LOCAL && !arp_ignore(in_dev, sip, tip)) |