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batman-adv: Distributed ARP Table - add snooping functions for ARP messages

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In case of an ARP message going in or out the soft_iface, it is intercepted and
a special action is performed. In particular the DHT helper functions previously
implemented are used to store all the ARP entries belonging to the network in
order to provide a fast and unicast lookup instead of the classic broadcast
flooding mechanism.
Each node stores the entries it is responsible for (following the DHT rules) in
its soft_iface ARP table. This makes it possible to reuse the kernel data
structures and functions for ARP management.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
This commit is contained in:
Antonio Quartulli
2011-06-26 03:37:18 +02:00
parent 5c3a0e5535
commit c384ea3ec9
6 changed files with 325 additions and 2 deletions
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2
net/batman-adv/main.h
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@@ -74,6 +74,8 @@
#define BATADV_LOG_BUF_LEN 8192 /* has to be a power of 2 */
/* msecs after which an ARP_REQUEST is sent in broadcast as fallback */
#define ARP_REQ_DELAY 250
/* numbers of originator to contact for any PUT/GET DHT operation */
#define BATADV_DAT_CANDIDATES_NUM 3