linux/net/batman-adv/Kconfig
Linus Lüssing 687937ab34 batman-adv: Add multicast optimization support for bridged setups
With this patch we are finally able to support multicast optimizations
in bridged setups, too. So far, if a bridge was added on top of a
soft-interface (e.g. bat0) the batman-adv multicast optimizations
needed to be disabled to avoid packetloss.

Current Linux bridge implementations and API can now provide us
with the so far missing information about interested but "remote"
multicast receivers behind bridge ports.

The Linux bridge performs the detection of remote participants
interested in multicast packets with its own and mature so
called IGMP and MLD snooping code and stores that in its
database. With the new API provided by the bridge batman-adv can
now simply hook into this database.

We then reliably announce the gathered multicast listeners to
other nodes through the batman-adv translation table.

Additionally, the Linux bridge provides us with the information about
whether an IGMP/MLD querier exists. If there is none then we need to
disable multicast optimizations as we cannot learn about multicast
listeners on external, bridged-in host then.

Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
2016-06-30 10:29:43 +02:00

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#
# B.A.T.M.A.N meshing protocol
#
config BATMAN_ADV
tristate "B.A.T.M.A.N. Advanced Meshing Protocol"
depends on NET
select CRC16
select LIBCRC32C
default n
help
B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is
a routing protocol for multi-hop ad-hoc mesh networks. The
networks may be wired or wireless. See
https://www.open-mesh.org/ for more information and user space
tools.
config BATMAN_ADV_BATMAN_V
bool "B.A.T.M.A.N. V protocol (experimental)"
depends on BATMAN_ADV && CFG80211=y || (CFG80211=m && BATMAN_ADV=m)
default n
help
This option enables the B.A.T.M.A.N. V protocol, the successor
of the currently used B.A.T.M.A.N. IV protocol. The main
changes include splitting of the OGM protocol into a neighbor
discovery protocol (Echo Location Protocol, ELP) and a new OGM
Protocol OGMv2 for flooding protocol information through the
network, as well as a throughput based metric.
B.A.T.M.A.N. V is currently considered experimental and not
compatible to B.A.T.M.A.N. IV networks.
config BATMAN_ADV_BLA
bool "Bridge Loop Avoidance"
depends on BATMAN_ADV && INET
default y
help
This option enables BLA (Bridge Loop Avoidance), a mechanism
to avoid Ethernet frames looping when mesh nodes are connected
to both the same LAN and the same mesh. If you will never use
more than one mesh node in the same LAN, you can safely remove
this feature and save some space.
config BATMAN_ADV_DAT
bool "Distributed ARP Table"
depends on BATMAN_ADV && INET
default n
help
This option enables DAT (Distributed ARP Table), a DHT based
mechanism that increases ARP reliability on sparse wireless
mesh networks. If you think that your network does not need
this option you can safely remove it and save some space.
config BATMAN_ADV_NC
bool "Network Coding"
depends on BATMAN_ADV
default n
help
This option enables network coding, a mechanism that aims to
increase the overall network throughput by fusing multiple
packets in one transmission.
Note that interfaces controlled by batman-adv must be manually
configured to have promiscuous mode enabled in order to make
network coding work.
If you think that your network does not need this feature you
can safely disable it and save some space.
config BATMAN_ADV_MCAST
bool "Multicast optimisation"
depends on BATMAN_ADV && INET && !(BRIDGE=m && BATMAN_ADV=y)
default n
help
This option enables the multicast optimisation which aims to
reduce the air overhead while improving the reliability of
multicast messages.
config BATMAN_ADV_DEBUG
bool "B.A.T.M.A.N. debugging"
depends on BATMAN_ADV
depends on DEBUG_FS
help
This is an option for use by developers; most people should
say N here. This enables compilation of support for
outputting debugging information to the kernel log. The
output is controlled via the module parameter debug.