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linux/net/batman-adv
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Linus Lüssing 2369e82704 batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh 
Scenario:
* Multicast frame send from BLA backbone gateways (multiple nodes
  with their bat0 bridged together, with BLA enabled) sharing the same
  LAN to nodes in the mesh

Issue:
* Nodes receive the frame multiple times on bat0 from the mesh,
  once from each foreign BLA backbone gateway which shares the same LAN
  with another

For multicast frames via batman-adv broadcast packets coming from the
same BLA backbone but from different backbone gateways duplicates are
currently detected via a CRC history of previously received packets.

However this CRC so far was not performed for multicast frames received
via batman-adv unicast packets. Fixing this by appyling the same check
for such packets, too.

Room for improvements in the future: Ideally we would introduce the
possibility to not only claim a client, but a complete originator, too.
This would allow us to only send a multicast-in-unicast packet from a BLA
backbone gateway claiming the node and by that avoid potential redundant
transmissions in the first place.

Fixes: 279e89b228 ("batman-adv: add broadcast duplicate check")
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>
2020-09-15 10:05:24 +02:00
..
bat_algo.c batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
bat_algo.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
bat_iv_ogm.c batman-adv: Introduce a configurable per interface hop penalty 2020-06-26 10:37:11 +02:00
bat_iv_ogm.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
bat_v_elp.c batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
bat_v_elp.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
bat_v_ogm.c batman-adv: Fix own OGM check in aggregated OGMs 2020-08-18 19:40:03 +02:00
bat_v_ogm.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
bat_v.c batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
bat_v.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
bitarray.c batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
bitarray.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
bridge_loop_avoidance.c batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh 2020-09-15 10:05:24 +02:00
bridge_loop_avoidance.h batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh 2020-09-15 10:05:24 +02:00
debugfs.c batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
debugfs.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
distributed-arp-table.c batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
distributed-arp-table.h batman-adv: remove unused inline function batadv_arp_change_timeout 2020-04-24 15:22:41 +02:00
fragmentation.c batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
fragmentation.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
gateway_client.c batman-adv: Avoid uninitialized chaddr when handling DHCP 2020-08-18 19:40:03 +02:00
gateway_client.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
gateway_common.c batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
gateway_common.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
hard-interface.c batman-adv: Introduce a configurable per interface hop penalty 2020-06-26 10:37:11 +02:00
hard-interface.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
hash.c batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
hash.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
icmp_socket.c batadv_socket_read(): get rid of pointless access_ok() 2020-05-20 20:31:33 -04:00
icmp_socket.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
Kconfig batman-adv: Disable CONFIG_BATMAN_ADV_SYSFS by default 2020-01-01 00:57:07 +01:00
log.c batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
log.h batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
main.c batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
main.h batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
Makefile batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
multicast.c batman-adv: mcast: fix duplicate mcast packets in BLA backbone from LAN 2020-09-15 10:05:24 +02:00
multicast.h batman-adv: mcast: fix duplicate mcast packets in BLA backbone from LAN 2020-09-15 10:05:24 +02:00
netlink.c batman-adv: Introduce a configurable per interface hop penalty 2020-06-26 10:37:11 +02:00
netlink.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
network-coding.c batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
network-coding.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
originator.c batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
originator.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
routing.c batman-adv: mcast/TT: fix wrongly dropped or rerouted packets 2020-09-05 08:45:46 +02:00
routing.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
send.c batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
send.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
soft-interface.c batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh 2020-09-15 10:05:24 +02:00
soft-interface.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
sysfs.c batman-adv: Fix refcnt leak in batadv_store_throughput_override 2020-04-21 10:08:05 +02:00
sysfs.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
tp_meter.c batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
tp_meter.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
trace.c batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
trace.h batman-adv: trace: Drop unneeded types.h include 2020-04-21 10:07:31 +02:00
translation-table.c batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
translation-table.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
tvlv.c batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
tvlv.h batman-adv: Update copyright years for 2020 2020-01-01 00:00:33 +01:00
types.h batman-adv: Introduce a configurable per interface hop penalty 2020-06-26 10:37:11 +02:00