[h323plus] H.235 sample

Mon Jan 20 11:03:29 EST 2014

Hi Simon,

I work with Claudio and we are having problems with the CVS version.
Inbound calls are not working.

The first problem is regarding the creation of the H245 channel then I saw
the following change in file transports.cxx:

H323Transport * H323TransportTCP::CreateControlChannel(H323Connection &
connection)
{
  H323TransportTCP * tcpTransport = new H323TransportTCP(endpoint,
localAddress, /*there was a TRUE here */);

Why this was changed?

When I put the TRUE back the execution proceeded but then failed in another
point. Then I saw that it seems one of the TLS related variables is set
even though I was not using TLS. I think the problem is in the same file at:

PBoolean H323TransportTCP::SecureAccept()
{
#ifdef H323_TLS
#if PTLIB_VER < 2120
    ssl_st * m_ssl = ssl;
#endif
    if (m_ssl)

It seems the variable m_ssl is set so the SecureAccept function ends up
returning false thus terminating the call. I could not find where this
variable is set and we had to disable TLS to make inbound calls work again.
I think the issue is reproducible with the simple example. I appreciate any
help. Thanks.

On Thu, Jan 16, 2014 at 9:02 AM, Cláudio Palludetti <
cpalludetti at daitangroup.com> wrote:

> Simon,
>
> This will certainly help a lot.
>
> Thanks
>
> Claudio
>
> On 16/01/2014, at 00:44, Simon Horne <s.horne at spranto.com> wrote:
>
> > Claudio
> >
> > Update:
> > H323_ExternalRTPChannel with encryption support has been added to the
> CVS.
> >
> > There is a new wrapper channel for H323_ExternalRTPChannel called
> > H323SecureChannel which handles all the key exchange and media
> > encryption/decryption if required.
> >
> > Simon
> >
> > -----Original Message-----
> > From: h323plus-bounces at lists.packetizer.com
> > [mailto:h323plus-bounces at lists.packetizer.com] On Behalf Of Simon Horne
> > Sent: 14 January 2014 05:07
> > To: 'Cláudio Palludetti'; 'Jan Willamowius';
> h323plus at lists.packetizer.com
> > Subject: Re: [h323plus] H.235 sample
> >
> > Claudio
> >
> > Yes the current H.235 Implementation does not take into account the use
> of
> > external RTP channel. I will put that on my TODO list to fix before the
> next
> > release.
> >
> > Simon
> >
> > -----Original Message-----
> > From: h323plus-bounces at lists.packetizer.com
> > [mailto:h323plus-bounces at lists.packetizer.com] On Behalf Of Cláudio
> > Palludetti
> > Sent: 13 January 2014 22:12
> > To: Jan Willamowius; h323plus at lists.packetizer.com
> > Subject: Re: [h323plus] H.235 sample
> >
> > Jan,
> >
> > Thank you.
> >
> > I had some progress towards establishing a H.235 call but it is falling
> when
> > it tries to open the logical channel.
> > So my question is: Is it possible to use H.235 along with external
> channels?
> > I'm asking this because H323RealTimeCapability::CreateChannel calls
> > connection.CreateRealTimeLogicalChannel (where you can provide your own
> > external channel subclass) but
> H323SecureRealTimeCapability::CreateChannel
> > creates a new H323SecureRTPChannel (it does not call any function where
> you
> > could return your own subclass). When I don't use H.235 I get the
> following
> > log:
> >
> > 2014/01/09 11:25:10.435 3         h323.cxx(4289) H323 Selecting
> > G.711-uLaw-64k <1>
> > 2014/01/09 11:25:10.435 3      h323neg.cxx(542) H245 Opening channel:
> T-101
> > 2014/01/09 11:25:10.435 4     h323caps.cxx(3265) H323 FindCapability: 102
> > 2014/01/09 11:25:10.435 4     h235caps.cxx(379) H235RTP Cloning
> Capability:
> > G.711-uLaw-64k
> > 2014-01-09:11.25.10 (8970) CltApp   DEBUG
> (H323ClientConnection.cpp:357)
> > Creating transmitter audio channel (G.711-uLaw-64k).
> >
> > The last one is from my subclass.
> >
> > When I try to use H.235 I get:
> >
> > 2014/01/09 15:55:00.655 3         h323.cxx(4289) H323 Selecting
> > G.711-uLaw-64k <1>
> > 2014/01/09 15:55:00.655 3      h323neg.cxx(542) H245 Opening channel:
> T-101
> > 2014/01/09 15:55:00.655 4     h323caps.cxx(3265) H323 FindCapability: 102
> > 2014/01/09 15:55:00.655 3     h323caps.cxx(3269) H323 Found capability:
> > SecCapability [2] <102>
> > 2014/01/09 15:55:00.656 4       osutil.cxx(189) PWLib File handle high
> water
> > mark set: 37 PUDPSocket
> > 2014/01/09 15:55:00.656 4       osutil.cxx(189) PWLib File handle high
> water
> > mark set: 38 PUDPSocket
> > 2014/01/09 15:55:00.656 2          rtp.cxx(1581) RTP_UDP Session 1
> created:
> > 192.168.14.43:5000-5001 ssrc=3823145998
> > 2014/01/09 15:55:00.656 2          rtp.cxx(1314) RTP Adding session
> RTP_UDP
> > 2014/01/09 15:55:00.656 4     h235caps.cxx(379) H235RTP Cloning
> Capability:
> > G.711-uLaw-64k #
> > 2014/01/09 15:55:00.656 3     channels.cxx(654) H323RTP Transmitter
> created
> > using session 1
> > 2014/01/09 15:55:00.656 4     h235chan.cxx(149) H235RTP OnSendingPDU
> > 2014/01/09 15:55:00.656 3     channels.cxx(472) H323RTP OnSendingPDU
> > 2014/01/09 15:55:00.656 3      h323rtp.cxx(134) RTP OnSendingPDU
> > 2014/01/09 15:55:00.657 3       codecs.cxx(1247) Codec G711 uLaw encoder
> > created for at 64k, frame of 160 samples
> > 2014/01/09 15:55:00.657 5      osutils.cxx(2219) PTLib Created read/write
> > mutex 0x7f85e4006b78
> > 2014/01/09 15:55:00.657 5      osutils.cxx(2219) PTLib Created read/write
> > mutex 0x7f85e4011398
> > 2014/01/09 15:55:00.657 3       h323ep.cxx(2543) Codec Opened sound
> channel
> > "Null Audio" for recording at 8000 samples/second using 2x320 byte
> buffers.
> > 2014/01/09 15:55:00.657 1     channels.cxx(716) LogChan Transmit thread
> > aborted (open fail) for G.711-uLaw-64k # <1>
> >
> > I appreciate any help. Thanks in advance.
> >
> > Claudio
> >
> > -----Original Message-----
> > From: h323plus-bounces at lists.packetizer.com
> > [mailto:h323plus-bounces at lists.packetizer.com] On Behalf Of Jan
> Willamowius
> > Sent: quarta-feira, 2 de outubro de 2013 10:50
> > To: h323plus at lists.packetizer.com
> > Subject: Re: [h323plus] H.235 sample
> >
> > Hi Claudio,
> >
> > take a look at the provided sample application "Simple".
> > When you start it with command line argument "-m 128", it will do H.235
> AES
> > 128 media encryption.
> >
> > Regards,
> > Jan
> >
> > --
> > Jan Willamowius, Founder of the GNU Gatekeeper Project EMail  :
> > jan at willamowius.de
> > Website: http://www.gnugk.org
> > Support: http://www.willamowius.com/gnugk-support.html
> >
> > Relaxed Communications GmbH
> > Frahmredder 91
> > 22393 Hamburg
> > Geschäftsführer: Jan Willamowius
> > HRB 125261 (Amtsgericht Hamburg)
> > USt-IdNr: DE286003584
> >
> >
> > Cláudio Palludetti wrote:
> >> Hi,
> >>
> >> We are developing an H.323 EP  and we need to use the H.235.
> >> Is there any example using this?
> >> We are using h323plus V1.24.0 and we enabled the H.235.
> >>
> >> Thanks
> >>
> >> Claudio
> >
> >
> >
> >
> >
> >
>
>
>
>
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