[OpenWrt-Devel] [PATCH netifd] bridge: allow enabling or disabling the multicast querier independently of IGMP snooping

Matthias Schiffer mschiffer at universe-factory.net
Wed Jan 28 08:26:01 EST 2015

On 01/28/2015 01:34 PM, John Crispin wrote:
> On 28/01/2015 13:30, Matthias Schiffer wrote:
>> On 01/28/2015 11:54 AM, John Crispin wrote:
>>> change this to
>>> bridge->ifname, (cfg->igmp_snoop & cfg->multicast_querier) ? "1"
>>> : "0");
>>> this should not break anything with multiple ubus calls. the
>>> default behavior also wont change as we set
>>> cfg->multicast_querier = true;
>>> Please make those changes to the patch and resend it.
>> Wouldn't it be better to change the possible values of
>> multicast_querier to "yes", "no" and "unset"? That way it could
>> always default to the igmp_snoop value when it is unset, but it
>> would be possible to override it in both ways.
> do you call this by hand or via webui/rpc ?
At the moment, this is compile-tested only. My only usecase is setting
it in /etc/config/network.

Your suggestion would make it impossible to enable the multicast querier
without also enabling snooping. My intention was to allow all four
combinations of snooping on/off and querier on/off, while having the
querier setting default to the snooping setting (so nothing changes for
people who have set igmp_snoop, but not multicast_querier). While I
don't need the case "querier on/snooping off", I don't see why we
shouldn't allow it.

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