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authorOctavian Purdila <opurdila@ixiacom.com>2010-01-18 12:58:44 +0000
committerDavid S. Miller <davem@davemloft.net>2010-01-19 02:12:34 -0800
commit6d955180b2f9ccff444df06265160868cabb289a (patch)
tree2ceaf1e1e49664712cc13bb07833538c8723f645 /net
parentfa44a73cc766c7f3bac71a66d564e0049b800325 (diff)
downloadop-kernel-dev-6d955180b2f9ccff444df06265160868cabb289a.zip
op-kernel-dev-6d955180b2f9ccff444df06265160868cabb289a.tar.gz
ipv4: allow warming up the ARP cache with request type gratuitous ARP
If the per device ARP_ACCEPT option is enable, currently we only allow creating new ARP cache entries for response type gratuitous ARP. Allowing gratuitous ARP to create new ARP entries (not only to update existing ones) is useful when we want to avoid unnecessary delays for the first packet of a stream. This patch allows request type gratuitous ARP to create new ARP cache entries as well. This is useful when we want to populate the ARP cache entries for a large number of hosts on the same LAN. Signed-off-by: Octavian Purdila <opurdila@ixiacom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/arp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 0787092..1940b4d 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -907,7 +907,8 @@ static int arp_process(struct sk_buff *skb)
devices (strip is candidate)
*/
if (n == NULL &&
- arp->ar_op == htons(ARPOP_REPLY) &&
+ (arp->ar_op == htons(ARPOP_REPLY) ||
+ (arp->ar_op == htons(ARPOP_REQUEST) && tip == sip)) &&
inet_addr_type(net, sip) == RTN_UNICAST)
n = __neigh_lookup(&arp_tbl, &sip, dev, 1);
}
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