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Linus Lüssing b61ec31c85 batman-adv: Snoop DHCPACKs for DAT 
In a 1000 nodes mesh network (Freifunk Hamburg) we can still see
30KBit/s of ARP traffic (equalling about 25% of all layer two
specific overhead, remaining after some filtering) flooded through
the mesh. These 30KBit/s are mainly ARP Requests from the
gateways / DHCP servers.

By snooping DHCPACKs we can learn about MAC/IP address pairs
in the DHCP range without relying on ARP. This patch is in preparation
to eliminate the need for mesh wide message flooding for IPv4 address
resolution.

Also this allows to quickly update a MAC/IP pair at least in the DHT when
DHCP reassigns an IP address to a new host.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
 		2018-12-30 18:14:42 +01:00
..
Kconfig batman-adv: enable MCAST by default at compile time 2018-11-12 10:41:51 +01:00
Makefile batman-adv: Provide debug messages as trace events 2018-09-15 09:51:08 +02:00
bat_algo.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bat_algo.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bat_iv_ogm.c batman-adv: Add inconsistent gateway netlink dump detection 2018-11-12 10:41:51 +01:00
bat_iv_ogm.h batman-adv: Unify include guards style 2018-07-07 22:02:17 +02:00
bat_v.c batman-adv: Add inconsistent gateway netlink dump detection 2018-11-12 10:41:51 +01:00
bat_v.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bat_v_elp.c batman-adv: Use explicit tvlv padding for ELP packets 2018-11-12 10:41:29 +01:00
bat_v_elp.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bat_v_ogm.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bat_v_ogm.h batman-adv: Unify include guards style 2018-07-07 22:02:17 +02:00
bitarray.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bitarray.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
bridge_loop_avoidance.c batman-adv: Add inconsistent claim netlink dump detection 2018-11-12 10:41:51 +01:00
bridge_loop_avoidance.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
debugfs.c batman-adv: Add includes for deprecation warning 2018-11-12 10:41:50 +01:00
debugfs.h batman-adv: Mark debugfs functionality as deprecated 2018-09-14 10:50:26 +02:00
distributed-arp-table.c batman-adv: Snoop DHCPACKs for DAT 2018-12-30 18:14:42 +01:00
distributed-arp-table.h batman-adv: Snoop DHCPACKs for DAT 2018-12-30 18:14:42 +01:00
fragmentation.c batman-adv: Expand merged fragment buffer for full packet 2018-11-12 10:41:29 +01:00
fragmentation.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
gateway_client.c batman-adv: Add inconsistent gateway netlink dump detection 2018-11-12 10:41:51 +01:00
gateway_client.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
gateway_common.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
gateway_common.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
hard-interface.c batman-adv: Add inconsistent hardif netlink dump detection 2018-11-12 10:41:51 +01:00
hard-interface.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
hash.c batman-adv: Store modification counter via hash helpers 2018-11-12 10:41:51 +01:00
hash.h batman-adv: Store modification counter via hash helpers 2018-11-12 10:41:51 +01:00
icmp_socket.c batman-adv: Mark debugfs functionality as deprecated 2018-09-14 10:50:26 +02:00
icmp_socket.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
log.c batman-adv: Allow to use BATMAN_ADV_DEBUG without BATMAN_ADV_DEBUGFS 2018-11-12 10:41:50 +01:00
log.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
main.c batman-adv: Add inconsistent hardif netlink dump detection 2018-11-12 10:41:51 +01:00
main.h batman-adv: Start new development cycle 2018-12-30 13:33:38 +01:00
multicast.c batman-adv: Add inconsistent multicast netlink dump detection 2018-11-12 10:41:51 +01:00
multicast.h batman-adv: add multicast flags netlink support 2018-03-14 10:15:34 +01:00
netlink.c batman-adv: Add inconsistent hardif netlink dump detection 2018-11-12 10:41:51 +01:00
netlink.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
network-coding.c batman-adv: Prevent duplicated nc_node entry 2018-09-06 13:55:58 +02:00
network-coding.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
originator.c batman-adv: Move OGM rebroadcast stats to orig_ifinfo 2018-09-15 09:51:10 +02:00
originator.h batman-adv: Move OGM rebroadcast stats to orig_ifinfo 2018-09-15 09:51:10 +02:00
routing.c batman-adv: Snoop DHCPACKs for DAT 2018-12-30 18:14:42 +01:00
routing.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
send.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
send.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
soft-interface.c batman-adv: Snoop DHCPACKs for DAT 2018-12-30 18:14:42 +01:00
soft-interface.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
sysfs.c batman-adv: Fix segfault when writing to sysfs elp_interval 2018-09-06 13:54:48 +02:00
sysfs.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
tp_meter.c batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
tp_meter.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
trace.c batman-adv: Improve includes for trace functionality 2018-11-12 10:41:50 +01:00
trace.h batman-adv: Improve includes for trace functionality 2018-11-12 10:41:50 +01:00
translation-table.c batman-adv: Add inconsistent local TT netlink dump detection 2018-11-12 10:41:51 +01:00
translation-table.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
tvlv.c batman-adv: Prevent duplicated tvlv handler 2018-09-06 14:37:13 +02:00
tvlv.h batman-adv: Update copyright years for 2018 2018-02-26 17:57:39 +01:00
types.h batman-adv: Add inconsistent gateway netlink dump detection 2018-11-12 10:41:51 +01:00