[PD] UDP server with Pd

[Martin Peach]

On Sat, Jun 5, 2021 at 3:31 AM Roman Haefeli <reduzent at gmail.com> wrote:
>
> On Fri, 2021-06-04 at 19:09 -0400, Martin Peach wrote:
> > On Fri, Jun 4, 2021 at 6:16 PM Roman Haefeli <reduzent at gmail.com>
> > wrote:
> > > On Fri, 2021-06-04 at 23:27 +0200, Christof Ressi wrote:
> > > > Instead of waiting for
> > > > https://github.com/pure-data/pure-data/issues/949
> > > > - which will probably take months -,
> > >
> > > I am exploring stuff, partly out of curiousity. There is no
> > > expectation
> > > of anything to happen in certain time.
> > >
> > > > you could make a feature request to
> > > > iemnet ;-)
> > >
> > > I just did:
> > > https://git.iem.at/pd/iemnet/-/issues/7
> >
> > Or you could copy the code from mrpeach/udpsndrcv into your own
> > external.
>
> To me,  [mrpeach/udpsndrcv] looks more similar to [iemnet/udpclient]
> than to [iemnet/udpserver]. Both, [mrpeach/udpsndrc] and
> [iemnet/udpclient] require the bind port to be closed before creating a
> new connection. [udpserver] would (ideally) keep the bind port open at
> any time and still be able to set an address (destination address and
> port) for sending.
>

If you have a [udpreceive 9898] as your 'server' it will receive from
anywhere on port 9898. So you can take the sender's ip and port from
the latest incoming message (route 'from' at the second outlet) and
use them to set the address and port of a single [udpsend] for the
reply.
There is no connection in udp so you need to add metadata in your
datagrams for routing and so forth.
Martin