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bd2a979e53
With this patch IGMP or MLD reports are always flooded. This is necessary for the upcoming bridge integration to function without multicast packet loss. With the report handling so far bridges might miss interested multicast listeners, leading to wrongly excluding ports from multicast packet forwarding. Currently we are treating IGMP/MLD reports, the messages bridges use to learn about interested multicast listeners, just as any other multicast packet: We try to send them to nodes matching its multicast destination. Unfortunately, the destination address of reports of the older IGMPv2/MLDv1 protocol families do not strictly adhere to their own protocol: More precisely, the interested receiver, an IGMPv2 or MLDv1 querier, itself usually does not listen to the multicast destination address of any reports. Therefore with this patch we are simply excluding IGMP/MLD reports from the multicast forwarding code path and keep flooding them. By that any bridge receives them and can properly learn about listeners. To avoid compatibility issues with older nodes not yet implementing this report handling, we need to force them to flood reports: We do this by bumping the multicast TVLV version to 2, effectively disabling their multicast optimization. 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>
85 lines
2.9 KiB
Plaintext
85 lines
2.9 KiB
Plaintext
#
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# B.A.T.M.A.N meshing protocol
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#
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config BATMAN_ADV
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tristate "B.A.T.M.A.N. Advanced Meshing Protocol"
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depends on NET
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select CRC16
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select LIBCRC32C
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default n
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help
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B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is
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a routing protocol for multi-hop ad-hoc mesh networks. The
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networks may be wired or wireless. See
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https://www.open-mesh.org/ for more information and user space
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tools.
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config BATMAN_ADV_BATMAN_V
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bool "B.A.T.M.A.N. V protocol (experimental)"
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depends on BATMAN_ADV && CFG80211=y || (CFG80211=m && BATMAN_ADV=m)
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default n
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help
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This option enables the B.A.T.M.A.N. V protocol, the successor
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of the currently used B.A.T.M.A.N. IV protocol. The main
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changes include splitting of the OGM protocol into a neighbor
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discovery protocol (Echo Location Protocol, ELP) and a new OGM
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Protocol OGMv2 for flooding protocol information through the
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network, as well as a throughput based metric.
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B.A.T.M.A.N. V is currently considered experimental and not
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compatible to B.A.T.M.A.N. IV networks.
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config BATMAN_ADV_BLA
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bool "Bridge Loop Avoidance"
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depends on BATMAN_ADV && INET
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default y
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help
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This option enables BLA (Bridge Loop Avoidance), a mechanism
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to avoid Ethernet frames looping when mesh nodes are connected
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to both the same LAN and the same mesh. If you will never use
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more than one mesh node in the same LAN, you can safely remove
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this feature and save some space.
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config BATMAN_ADV_DAT
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bool "Distributed ARP Table"
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depends on BATMAN_ADV && INET
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default n
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help
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This option enables DAT (Distributed ARP Table), a DHT based
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mechanism that increases ARP reliability on sparse wireless
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mesh networks. If you think that your network does not need
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this option you can safely remove it and save some space.
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config BATMAN_ADV_NC
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bool "Network Coding"
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depends on BATMAN_ADV
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default n
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help
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This option enables network coding, a mechanism that aims to
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increase the overall network throughput by fusing multiple
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packets in one transmission.
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Note that interfaces controlled by batman-adv must be manually
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configured to have promiscuous mode enabled in order to make
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network coding work.
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If you think that your network does not need this feature you
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can safely disable it and save some space.
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config BATMAN_ADV_MCAST
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bool "Multicast optimisation"
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depends on BATMAN_ADV && INET
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default n
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help
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This option enables the multicast optimisation which aims to
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reduce the air overhead while improving the reliability of
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multicast messages.
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config BATMAN_ADV_DEBUG
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bool "B.A.T.M.A.N. debugging"
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depends on BATMAN_ADV
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depends on DEBUG_FS
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help
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This is an option for use by developers; most people should
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say N here. This enables compilation of support for
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outputting debugging information to the kernel log. The
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output is controlled via the module parameter debug.
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