xavi/android_kernel_m2note/net/ipv4/arp.c, branch ng-7.1.2

ipv4: arp: update neighbour address when a gratuitous arp is received and arp_accept is set

2019-05-02T12:30:26+00:00

Gratuitous arp packets are useful in switchover scenarios to update client arp tables as quickly as possible. Currently, the mac address of a neighbour is only updated after a locktime period has elapsed since the last update. In most use cases such delays are unacceptable for network admins. Moreover, the "updated" field of the neighbour stucture doesn't record the last time the address of a neighbour changed but records any change that happens to the neighbour. This is clearly a bug since locktime uses that field as meaning "addr_updated". With this observation, I was able to perpetuate a stale address by sending a stream of gratuitous arp packets spaced less than locktime apart. With this change the address is updated when a gratuitous arp is received and the arp_accept sysctl is set. Change-Id: Ic902dec99749684ab82527d15e0beed2bbaa1c77 Signed-off-by: Salam Noureddine Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller

ipv4: add option to drop gratuitous ARP packets

2017-11-18T18:27:08+00:00

In certain 802.11 wireless deployments, there will be ARP proxies that use knowledge of the network to correctly answer requests. To prevent gratuitous ARP frames on the shared medium from being a problem, on such deployments wireless needs to drop them. Enable this by providing an option called "drop_gratuitous_arp". Signed-off-by: Johannes Berg Signed-off-by: David S. Miller Signed-off-by: danielhk

mtk: 3.10 updates

2017-04-29T14:47:32+00:00

first commit

2016-08-15T02:19:42+00:00