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ipv4: add option to drop gratuitous ARP packets

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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 <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg 2016-02-04 13:31:18 +01:00 • committed by David S. Miller
parent 12b74dfadb
commit 97daf33145
4 changed files with 17 additions and 0 deletions
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1
include/uapi/linux/ip.h
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@ -166,6 +166,7 @@ enum
IPV4_DEVCONF_IGMPV3_UNSOLICITED_REPORT_INTERVAL,
IPV4_DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
IPV4_DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
IPV4_DEVCONF_DROP_GRATUITOUS_ARP,
__IPV4_DEVCONF_MAX
};