[h323plus] H323plus support for UDP signalling

[J.C Mercier]

Thanks Simon,

I will definitely look into what you suggested and go from there.

Josh

On Wed, Apr 11, 2012 at 1:29 AM, Simon Horne <s.horne at packetizer.com> wrote:

> Josh****
>
> ** **
>
> All call signaling is via TCP. Although there is support for transmission
> over UDP in the standard AFAIK no-one has implemented it. ****
>
> ** **
>
> There are pro’s and con’s either way****
>
> TCP is reliable and as you say you can have large message sizes however as
> it’s a persistent connection and can and does break (for instance with NAT)
> and calls do drop.  Just finished a major commit to resolve that issue in
> the h323plus stack and if the connection does break then there is an
> attempt to reconnect and the call does not drop. UDP signaling guys have
> been throwing that around for years to justify using UDP for signaling. **
> **
>
> ** **
>
> You can add custom messages via the H460_Feature interface. There is a
> H460 factory loader subsystem which loads your derived class into the
> signaling. The H460_Feature class contains message overrides for each
> signaling message. You would want to look at deriving you class from
> H460_FeatureOID or H460_FeatureNonStd.  To get an idea what to do, have a
> look at H460_FeatureStd19 it has most of the structure you need there. ***
> *
>
> ** **
>
> Simon****
>
> ** **
>
> ** **
>
> ** **
>
> *From:* h323plus-bounces at lists.packetizer.com [mailto:
> h323plus-bounces at lists.packetizer.com] *On Behalf Of *J.C Mercier
> *Sent:* 11 April 2012 15:06
> *To:* h323plus
> *Subject:* [h323plus] H323plus support for UDP signalling****
>
> ** **
>
> Hi all,
>
> Just curious, does H323plus support signalling via UDP? If not, what are
> the advantages of using TCP signalling over UDP, aside from it being
> reliable (considering UDP packets doesn't exceed the UDP size limit for
> each message sent, if it's even possible with H323 messages) ?
>
> Another question, is it possible to include generic messages within the
> signalling messages (setup, process, alert, connect, facility etc) just as
> we can with the h.245 OLC messages?
>
> Thanks in advance for your help and suggestions.
>
> Josh C. M****
>
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