[zeromq-dev] zyre

[Utsav Drolia]

Is compiling zyre for Android documented anywhere?
Also are the python bindings for zyre stable now? I was thinking of using python on Android (e.g. SL4A) and accessing zyre through it.

Utsav

> On Mar 24, 2015, at 6:35 AM, Pieter Hintjens <ph at imatix.com> wrote:
> 
> I think the multicast filtering on access points counts as a bug in
> the Android WiFi stack, simply. There's no inherent reason for it.
> It's also difficult to work around except by using broadcast, which we
> did.
> 
> It is possible to imagine Zyre working without bi-directional
> discovery, so if A sees B, and connects to B, then B can connect back
> to A even if it cannot see A's beacons. However we also use beacons
> for heartbeating, as TCP is too inefficient. So we need this to work
> both ways...
> 
> Since we introduced gossip discovery, however, it makes sense to
> support multiple different discovery mechanisms. The calling app can
> choose UDP broadcast if it wants that.
> 
> We could even tune this silently, e.g. use broadcast on WiFi, and
> multicast on ethernet.
> 
> -Pieter
> 
> On Tue, Mar 24, 2015 at 11:17 AM, Arnaud Loonstra <arnaud at sphaero.org> wrote:
>> I'm no Android guru but it might be logical. When the device becomes a
>> hotspot it essentially becomes a router. It should then support the
>> IGMP
>> protocol. A broadcast it could simply forward anywhere. There's a
>> question
>> on SO:
>> http://stackoverflow.com/questions/6550618/multicast-support-on-android-in-hotspot-tethering-mode
>> 
>> No definite answer though.
>> 
>> Even on a linux machine you have to do some configuration before it
>> does
>> multicast routing, i think.
>> 
>> $ cat /proc/sys/net/ipv4/conf/all/mc_forwarding
>> 0
>> 
>> Arnaud
>> 
>> On 2015-03-23 18:13, Pieter Hintjens wrote:
>>> We used multicast first, and then switched to broadcast UDP because
>>> the Android stack filters (or used to) incoming multicast when it is
>>> running as an access point.
>>> 
>>> On Mon, Mar 23, 2015 at 5:58 PM, Arnaud Loonstra <arnaud at sphaero.org>
>>> wrote:
>>>> "but I'm working on it in C nor Android"
>>>> 
>>>> Add 'not' to that... I'm working on it in Python
>>>> 
>>>> On 03/23/2015 04:05 PM, Arnaud Loonstra wrote:
>>>>> Yes, but I'm working on it in C nor Android(currently):
>>>>> 
>>>>> https://github.com/zeromq/pyre/blob/master/pyre/zbeacon.py#L208
>>>>> 
>> 
>> 
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