[OpenWrt-Devel] Regarding bridge multicast-to-unicast patch

Felix Fietkau nbd at openwrt.org
Thu Sep 11 10:51:41 EDT 2014

On 2014-09-11 16:28, Linus Lüssing wrote:
> On Wed, Sep 10, 2014 at 04:31:37PM +0200, Linus Lüssing wrote:
>> Another approach would be
>> to add a feature to mac80211 to disable the forwarding of
>> IGMPv2/MLDv1 reports to other STAs, only forwarding it on the own
>> AP interface so that the bridge would see all reports.
> Hrm, on the other hand, if a querier is actually on one of the
> other STAs then mac80211 would have to forward the report there.
> Which would mean either needing query-snooping in mac80211 (or
> netdev in general) or interaction between mac80211 and the
> bridge-snooping code.
> I really hate this IGMPv2/MLDv1 report suppression...
> (that's where all the complexity in the batman-adv multicast
> optimizations came from, too)
How widely used is IGMPv2/MLDv1 compared to the newer version?

- Felix
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