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h323ep.cxx - Number translation problems.
by Francisco Olarte 23 Jul '15

23 Jul '15

A little background info: We use yate with h323plus to make calls, currently h323+ 1.25.0, yate 5.5. In our system we use '#' extensively to delimit routing info ( as we use variable length prefixes, this makes them unique and we can distinguish between 10+347... and 103+47....). But one day we used ## in a special prefix and the calls began to fail. We saw yate thar when dialing "0##666#88820334661" we ended up with the following ( every phne number redacted, cut last six numbers of phones for privacy ) pdu in the gatekeeper: admissionRequest { requestSeqNum = 32114 callType = pointToPoint <<null>> endpointIdentifier = 12 characters { .... } destinationInfo = 1 entries { [0]=url_ID "666%2388820334661@0" } ..... } which lead to a rejected call. We expected something on the line ( from another PDU without double hash ): admissionRequest { ... destinationInfo = 1 entries { [0]=dialedDigits "100#00543414" } ... } like: destinationInfo = 1 entries { [0]=dialedDigits "0##666#88820334661" } an url instead of "0#34666666666" to the gatekeeper. After further examination we found the following in h323+ 1.25.0: [src]$ fgrep -R -C7 '"##"' h323plus/ h323plus/src/h323ep.cxx-PBoolean H323EndPoint::ParsePartyName(const PString & _remoteParty, h323plus/src/h323ep.cxx- PString & alias, h323plus/src/h323ep.cxx- H323TransportAddress & address) h323plus/src/h323ep.cxx-{ h323plus/src/h323ep.cxx- PString remoteParty = _remoteParty; h323plus/src/h323ep.cxx- h323plus/src/h323ep.cxx- // Support [address]##[Alias] dialing h323plus/src/h323ep.cxx: PINDEX hash = _remoteParty.Find("##"); h323plus/src/h323ep.cxx- if (hash != P_MAX_INDEX) { h323plus/src/h323ep.cxx- remoteParty = "h323:" + _remoteParty.Mid(hash+2) + "@" + _remoteParty.Left(hash); h323plus/src/h323ep.cxx- PTRACE(4, "H323\tConverted " << _remoteParty << " to " << remoteParty); h323plus/src/h323ep.cxx- } h323plus/src/h323ep.cxx- h323plus/src/h323ep.cxx- //check if IPv6 address h323plus/src/h323ep.cxx- PINDEX ipv6 = remoteParty.Find("::"); Well, it seems some function which should ( IMO ) be in the gatekeeper or the dialer as been grafted inside the generic endpoint code. Not too big a problem. We just developed a patch to zap the code patch and followed on. But then, we had a look ar h323plus 1.25.4 and found: PString remoteParty = _remoteParty; // Support [address]##[Alias] dialing PINDEX hash = _remoteParty.Find("##"); if (hash != P_MAX_INDEX) { remoteParty = "h323:" + _remoteParty.Mid(hash+2) + "@" + _remoteParty.Left(hash); PTRACE(4, "H323\tConverted " << _remoteParty << " to " << remoteParty); } PINDEX phash = _remoteParty.Find("#"); if (phash != P_MAX_INDEX) { remoteParty.Replace("#","%"); PTRACE(4, "H323\tAdjusted " << remoteParty); } //check if IPv6 address PINDEX ipv6 = remoteParty.Find("::"); Which is worst, now we can even use a single #. I wonder what is the rationale for doing this kind of transformations. We are developing another patch for this, but fear the future. For me it looks like this is trying to overcome the limitations of some device so the user can dial URLs ? IP ? from the phone keyboard, but on the way they are destroying our routing, and as they are buried deep inside the lib ( where I personally think they shouldn't be ) they are tricky to detect and fix. Shouldn't this kind of legal-number-destroying functionality be relegated to an overridable method, or just delegated to the client code? Is this going to go on ( I mean, more exotic translations on otherwise legal dialedDigits ) ? And I'm not the only one using '#' in the digits, some of our providers do it too. Regards. Francisco Olarte.

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GNU Gatekeeper 3.9 is available
by Jan Willamowius 10 Jul '15

10 Jul '15

I am pleased to announce a new release of the GNU Gatekeeper, version 3.9, now available from http://www.gnugk.org/h323download.html. This release includes source code suitable for Linux, Windows, MacOS X, FreeBSD, NetBSD, OpenBSD and Solaris and executables for Linux. -- Jan Whats new in GnuGk 3.9 ? - bug fixes, including a crash and hanging status port on Windows servers - a new IP/port detection algorithm for endpoints behind NAT that works well even with unregistered (!) endpoint H.460 NAT traversal requires all endpoints to register with their gatekeeper. Thus users have to enter IPs in config dialogs etc. With this new port detection, they can start making calls right away to <alias>@<gatekeeper IP> or <gatekeeper IP>##<alias>. - neighbor pings to speed up call routing if your neighbors are frequently down Neighbors get pinged with an LRQ and if they don't respond with either LCF or LRJ GnuGk will skip them in the call routing without waiting for a timeout. - geo-blocking with the GeoIPAuth policy, you can allow or block calls based on the location of the IP - status port event back log When you connect to the status port to diagnose an issue, the relevant events are already gone. With this new feature you can tell GnuGk to save the last n events and show them later on. This way you can take a look at eg. the last 100 failed registrations etc. - QoS DiffServ marking for RAS, H.225 and H.245 messages (based on a patch provided by Vidyo) Now you can set the DiffServ class for signaling messages. Previously you could only mark RTP packets. - support for H.235.TSSM H.235 needs time synchronization between gatekeeper and endpoints and the proposed H.235.TSSM standard provides a means for endpoints to detect that they are not in sync with the gatekeeper and apply a time offset. Download from http://www.gnugk.org/h323download.html -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan(a)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

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H323connection AnsweringCall issue
by Ankur Deep Jaiswal 09 Jun '15

09 Jun '15

Hi, I am facing a strange problem, on H323Connection::OnAnswerCall i am returning AnswerCallPending. and after sometime i call H323Connection::AnsweringCall with AnswerCallNow . but what happens now and then, i would say every second call, is that, even if i call H323Connection::AnsweringCall, the PDU does not seem to have been sent. the connection then proceeds to be in a vegetative state. when i disconnect the connection and reconnect it, it proceeds to connect successfully. i am not creating any extra threads in the system. the logic for H323Connection::AnsweringCall runs on the main thread. i am using h323plus version 1.26.5. regards -- Ankur Deep Jaiswal

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H323Plus User Survey
by Jan Willamowius 18 May '15

18 May '15

Dear Community, we would like to learn a bit more about the users of the H323Plus project: What do you like, what is missing etc. Please fill out this short questionnaire and help us decide where the project should be heading: http://www.gnugk.org/h323plus-survey.html Thanks for your time! -- Jan Willamowius, Founder of the GNU Gatekeeper Project (and H323Plus developer since 1999) EMail : jan(a)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

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h323plus - GetConnectedNumber
by Tarmo Aia 10 May '15

10 May '15

Hi! I dealt with problem, that user picked up the call from the hunt group but the call manager did not changed the Remote Party number but only affected the Q931 connect message with IE Connected Number property. I added a little function called SetRemoteConnectedNumber to h323.cxx to read it and change to the remote party number during answer (connection). Not sure this is the 100% right way but I would contribute this small line of code if You have interest. Tested working with Avaya Call manager 6.x Best regards, Tarmo Aia

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GNU Gatekeeper Survey
by Jan Willamowius 08 Apr '15

08 Apr '15

Dear all, I have prepared a short survey to learn more about how you use the GNU Gatekeeper, which features you use, what might be missing etc. Please take a moment to provide some feedback for the future direction of the project: http://www.gnugk.org/survey-2015.html Thanks! Jan -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan(a)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

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Nagios plugin for H.323
by Jan Willamowius 05 Feb '15

05 Feb '15

Hi, I have released a Nagios plugin to monitor H.323 devices (any H.323 gatekeeper or gateway, it doesn't have to be GnuGk). http://www.gnugk.org/nagios-h323.html It doesn't just check if the device listens to a port, but sends a real H.323 message (GRQ or LRQ) and checks if a well formed message comes back. Enjoy! -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan(a)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

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GNU Gatekeeper 3.8 is available
by Jan Willamowius 05 Jan '15

05 Jan '15

I am pleased to announce a new release of the GNU Gatekeeper, version 3.8, now available from http://www.gnugk.org/h323download.html. Please see the attached notes for details. This release includes source code suitable for (Linux, Windows, MacOS, FreeBSD, NetBSD, OpenBSD and Solaris) and executables for Linux. -- Jan Whats new in GnuGk 3.8 ? In response to the current wave of H.323 spam / hacking GnuGk 3.8 has a number of improvements to security related features and older versions should be updated. - endpoint IDs are now completely random and not as easily guessable as they were before - GnuGk is now using better random numbers in security relevant places - new authentication modules using LUA scripts called LuaAuth - new switch [RasSrv::ARQFeatures] CheckSenderIP=1 to make sure ARQs come from the same IP as the initial registration - FileIPAuth is now able to check ARQ messages - AliasAuth updated to work with H.460.18 endpoint - PrefixAuth was extended to support unregistered calls - SQLAuth can now operate on SrcInfo fields using %{SrcInfo} - improvements to the addpasswd utility for the new web interface Other new non-security related features include: - The CatchAll policy now rewrites the destination alias which makes it easier to send CatchAll calls to MCU rooms. - You can now filter out whole capability classes, eg. all video or H.239 capabilities if some of your endpoints have trouble handling them - A new switch [Gatekeeper::Main] MinH323Version= lets you set the H.323 version GnuGk identifies itself as using (up to the latest version 7). This is mainly to deal with endpoint that switch features when they believe they are talking to older endpoints (which one shouldn't be doing...) - a number bugs and crashes fixed Download from http://www.gnugk.org/h323download.html -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan(a)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

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maxBitrate in External RTP
by Ankur Deep Jaiswal 27 Aug '14

27 Aug '14

Hi, I have a doubt, How do you get Max-Bitrate supported by a Capability in H323_ExternalRTPChannel. Help appreciated. -- Ankur Deep Jaiswal

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GNU Gatekeeper 3.7 has been released
by Jan Willamowius 15 Aug '14

15 Aug '14

Hi, I'm happy to announce version 3.7 of the GNU Gatekeeper. http://www.gnugk.org/h323download.html This is mainly a bugfix release that corrects a number of errors and crashes (see below). Please follow these compile instructions: http://www.gnugk.org/compiling-gnugk.html Enjoy! Detailed change log: - allow Comment= in all sections - new status port command: "debug cfg all" to print the full configuration - stub code to fake support for Avaya 2.16.840.1.114187.1.3 authentication (disabled by default) - BUGFIX(Neighbor.cxx) fix outbound rules for GWRewriteE164 with neighbors - BUGFIX(RasSrv.cxx) fix crash on shutdown - BUGFIX(gkauth.cxx) for passwort auth look at correct src or dest info - BUGFIX(Toolkit.cxx) more flexible column handling for [SQLConfig] PermanentEndpountsQuery, document priority and vendor info setting - BUGFIX(gksql_sqlite.cxx) return empty string for NULL columns, like the other DB drivers do - BUGFIX(RasTbl.cxx) fix formatting of PrintAllRegistrations and PrintAllRegistrationsVerbose - BUGFIX(GkStatus.cxx) better handling when status clients don't quit properly - BUGFIX(Toolkit.cxx) fix selection of reply address for IPv6 -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan(a)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

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Re: [h323plus] [Openh323gk-users] Using LibreSSL instead of OpenSSL with GnuGk / H323Plus / PTLib
by Jan Willamowius 29 Jul '14

29 Jul '14

It would be nice if PTLib would do a pgk-config check for "openssl" or "libressl" to activate the OpenSSL code. I simply named the pgk-config file for LibreSSL "openssl.pc" to work around that. To use GnuTLS for the H.323 media encryption in GnuGk and H323Plus, PSSLxxx wrappers won't help. The OpenSSL compatibility mode of GnuTLS also isn't enough. regards, Jan Robert Jongbloed wrote: > Excellent! > > Are there any tweaks to the configure.ac that should happen to find > LibreSSL? > > > And re GnuTLS, the whole point of the PSSLxxx class wrappers in PTLib > was to allow for use of other API's to OpenSSL/LibreSSL. At least as a > configure/compile time option. One of these years, someone may cough up > the time/money to actually do the implementation .... > > *Robert Jongbloed* > OPAL/OpenH323/PTLib Architect and Co-founder. > Commercial support at http://www.voxlucida.com.au > /Travelling, so email responses may be slow!/ > > Robert. On 29/07/2014 5:30 pm, Jan Willamowius wrote: > > Hi, > > > > with the bugs recently found in OpenSSL, there is some concern how many > > more issues still lurk in the old and crufty OpenSSL code. There is a > > great effort by some OpenBSD developers to fork OpenSSL into > > "LibreSSL" (www.libressl.org) and clean up the code while keeping the > > public interface stable. > > > > I did a quick check and can report that GnuGk / H323Plus / PTLib > > compile well with LibreSSL instead of OpenSSL. All I had to do was > > provide a pkg-config file. So now we have a choice which library to use. > > > > I used LibreSSL Portable 2.0.3 for my test. > > > > Another interesting project would be to use GnuTLS as a replacement, > > but thats going to require a number of code changes on our side. > > > > Regards, > > Jan > > > -- Jan Willamowius, jan(a)willamowius.de, http://www.gnugk.org/

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Using LibreSSL instead of OpenSSL with GnuGk / H323Plus / PTLib
by Jan Willamowius 29 Jul '14

29 Jul '14

Hi, with the bugs recently found in OpenSSL, there is some concern how many more issues still lurk in the old and crufty OpenSSL code. There is a great effort by some OpenBSD developers to fork OpenSSL into "LibreSSL" (www.libressl.org) and clean up the code while keeping the public interface stable. I did a quick check and can report that GnuGk / H323Plus / PTLib compile well with LibreSSL instead of OpenSSL. All I had to do was provide a pkg-config file. So now we have a choice which library to use. I used LibreSSL Portable 2.0.3 for my test. Another interesting project would be to use GnuTLS as a replacement, but thats going to require a number of code changes on our side. Regards, Jan -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan(a)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

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FW: [h323-announce] H.323 Update Following the Sapporo Meeting
by Simon Horne 19 Jul '14

19 Jul '14

FYI The updates will be included in H.323v8 Simon From: h323-announce-bounces(a)lists.packetizer.com [mailto:h323-announce-bounces@lists.packetizer.com] On Behalf Of Paul E. Jones Sent: Sunday, July 20, 2014 8:19 AM To: H.323 Announce List Subject: [h323-announce] H.323 Update Following the Sapporo Meeting <http://www.packetizer.com> Folks, The most recent ITU-T SG16 meeting was held in Sapporo, Japan 30 June - 11 July 2014. Perhaps most significant at this meeting relating to H.323 is the fact that we approved two new Recommendations related to Telepresence systems: * ITU-T Rec. F.734, "Definitions, requirements, and use cases for Telepresence Systems" * ITU-T Rec. H.420, "Telepresence System Architecture" Progress was also made on revisions to each of the core H.323 Recommendations, namely H.323, H.225.0, and H.245. Some of the enhancements introduced are to support Telepresence systems, including the CLUE signaling channel. Support for the WebRTC Data Channel was also introduced in H.245. Of course, the work on Telepresence and WebRTC support is not complete, but progress is being made. We also adopted baseline text for the end-to-end Session Identifier, which is work that was initiated a few years ago. The work is being progressed in both the IETF and ITU in parallel, with the IETF work nearing completion. This work will allow for the identification of a communication session end-to-end from the point of origin to the point of termination, even if the call is carried over a mixture of H.323 and SIP networks. I have updated the document status page here: http://www.packetizer.com/ipmc/h323/doc_status.html. This shows the current status of the various H.323-related work items in ITU-T SG16. Best regards, Paul E. Jones http://paulej.com/

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Avaya Authentication methods
by Jan Willamowius 27 Jun '14

27 Jun '14

Hi, I was just discussing with Simon if anybody would need the Avaya authentication procedures OID 1.3.14.3.2.6 and OID 2.16.840.1.114187.1.3 in H323Plus. Both are said to be DES based, so they don't offer much security, but they can be useful with legacy equipment. I have an almost complete implementation for OID 1.3.14.3.2.6 in GnuGk, that just needs a little fleshing out for the encryption part which GnuGk doesn't need, before it can be moved into H323Plus. For OID 2.16.840.1.114187.1.3 I have some stub code that allows endpoints to register with GnuGk, but some crypto details are still uncertain. So, if anybody needs this stuff, please speak up. ;-) Cheers, Jan -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan(a)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

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GNU Gatekeeper 3.6 has been released
by Jan Willamowius 07 May '14

07 May '14

Hi, I'm happy to announce version 3.6 of the GNU Gatekeeper. http://www.gnugk.org/h323download.html This version contains support for Polycom's domain##alias addressing, a new policy to route by URI prefix, better config checking, fixes for H.460.19 port detection and a number of other bugfixes and smaller features. I'm trying to cut down on the time I have to spend on each release, so I will only provide executable to support client for this version. Please follow these instructions to compile GnuGk yourself: http://www.gnugk.org/compiling-gnugk.html Detailed change log: - support Polycom's domain##alias addressing in DNS policy - new command line switch: --strict (don't start with config errors) - new routing policy [Routing::URIService] to define service specific URI routing policy. - allow SendTo= without AlternateGKs= switch - new switch [EP::...] ForceGateway=1 to treat an endpoint as a gateway - new switch [EP::...] AddCallingPartyToSourceAddress=1 - new switch [EP::...] DisableCallCreditCapabilities=1 - verify the correct payloadType on H.460.19 keep-alive packets (disable with [Proxy] CheckH46019KeepAlivePT=0) - support libssh 0.6.x - BUGFIX(ProxyChannel.cxx) fix memory leak on TLS errors - BUGFIX(RasTbl.cxx) use 64bit numbers for AddNumbers= ranges - BUGFIX(RasSrv.cxx) fill destCallSignallAddress in answer ACF in direct mode - BUGFIX(RasSrv.cxx) fix callSignalPort in LCF when H.460.22 is enabled - BUGFIX(ProxyChannel.cxx) read ProxyHandlerHighPrio switch earlier - BUGFIX(ProxyChannel.cxx) wait 4 sec before using regular RTP packets for H.460.19 port detection - BUGFIX(gk.cxx) small fixes for MacOSX -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan(a)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

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Null pointer reference
by Ankur Deep Jaiswal 05 May '14

05 May '14

Hi, I am using H323plus v 1.26.3. With the External rtp example, I am getting a 'Assertion fail: Null pointer reference, file channels.cxx, line 629, Error=22' while trying to open a channel with capability G.711-ALaw-64k. it happens at H323_ExternalRTPChannel::OnSendingPDU at line number 1329. Help appreciated -- Ankur Deep Jaiswal

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OnConnectionEstablished fired twice in the same call
by Ankur Deep Jaiswal 08 Apr '14

08 Apr '14

Hi, I was testing h323plus v 1.26.0 using sample/simple. i have come across a scenario where OnConnectionEstablished is being called twice in the same call. i am attaching a level 4 trace file. Help appreciated. -- Ankur Deep Jaiswal

1 0

report bugs and seek help
by 李银城 06 Apr '14

06 Apr '14

Dear H323plus Team: I want to report some bugs(maybe) and seek help, for these days I'm installing the package and come across some problem. The first thing I want to mention is that when compiling the h235auth.cxx file, error occurs: [CC] h235auth.cxx h235auth.cxx: In member function ‘void H235Authenticators::PrepareSignalPDU(unsigned int, PASN_Array&, PASN_Array&, PINDEX) const’: h235auth.cxx:449:39: error: ‘m_maxTokenLength’ was not declared in this scope PINDEX keyLength = (max_keyLength > m_maxTokenLength) ? m_maxTokenLength : max_keyLength; I trace the source file and find that "m_maxTokenLength" actually defined in h235auth.h, but with a precompile header #ifdef H323_H235. Problem is that the function error occuring function PrepareSignalPDU doesn't wrapped by that header and use the wrapped variables which may not be defined. So if one can make the H323_H235 available, it will be cured. I trace through and find that this header require #define OPENSSL, so I install the package on windows(XP) then it really compile well. But on my Ubuntu, still fails. So I make the undefind variables out the precompile section and then the "make" progresses smoothly but I don't know what consequences will be. Secondly, I want to enable h263 feature, it requires the ffmpeg codec and I install the newest version 2.2. But it didn't work. Configure says: checking for LIBAVCODEC... yes configure: libavcodec stack align hack disabled checking for h263p_encoder in -lavcodec... no checking for h263p_encoder in -lavcodec... (cached) no checking for mpeg4_encoder in -lavcodec... no checking for h264_decoder in -lavcodec... no I think the "no" checks are the causes. Is " -lavcodec" are passed to ffmpeg as its arguments to check if it support the codecs? I check the ffmpeg's option and only find that ffmpeg has a similar option "codec" which list out all its suport codes where I find h264. There goes what I want to seek help: 1. The oh323tut require a wav file. What's its effects, a tmp file as a buff? The web says it requires the format 16 bit with 8000 Hz and I use cool edit software to produce such a wav file but the program still report wrong file format error. So I got stuck. 2. How can I catch video from my computer camera. I can't run the h323plus sample "simple", it crash when come to the call PVideoInputDevice::GetDeviceCapabilities in arg initialization. I debug and found that the ptlib function calls in a cycle: A call B; B call C; C call A. Then the stack runs out. So, what's the trouble here? How can I get my device name pass it to the program instead of "*"? Last but not least, I want to ask Is there any detailed tutorial to learn. I search the net using google, the valuable one is almost only the oh323tut. But the oh323tut is a little too simple. It only shows the audio feature. How is the video? The simple sample shows an example I guess I can try to understand. Is there any related code or project using H323plus, for example using glade to show the video. Best regards Yincheng Li South China Normal University ------------------

3 3

help
by 李银城 05 Apr '14

05 Apr '14

Dear H323plus Team: I want to report some bugs(maybe) and seek help, for these days I'm installing the package and come across some problem. The first thing I want to mention is that when compiling the h235auth.cxx file, error occurs: [CC] h235auth.cxx h235auth.cxx: In member function ‘void H235Authenticators::PrepareSignalPDU(unsigned int, PASN_Array&, PASN_Array&, PINDEX) const’: h235auth.cxx:449:39: error: ‘m_maxTokenLength’ was not declared in this scope PINDEX keyLength = (max_keyLength > m_maxTokenLength) ? m_maxTokenLength : max_keyLength; I trace the source file and find that "m_maxTokenLength" actually defined in h235auth.h, but with a precompile header #ifdef H323_H235. Problem is that the function error occuring function PrepareSignalPDU doesn't wrapped by that header and use the wrapped variables which may not be defined. So if one can make the H323_H235 available, it will be cured. I trace through and find that this header require #define OPENSSL, so I install the package on windows(XP) then it really compile well. But on my Ubuntu, still fails. So I make the undefind variables out the precompile section and then the "make" progresses smoothly but I don't know what consequences will be. Secondly, I want to enable h263 feature, it requires the ffmpeg codec and I install the newest version 2.2. But it didn't work. Configure says: checking for LIBAVCODEC... yes configure: libavcodec stack align hack disabled checking for h263p_encoder in -lavcodec... no checking for h263p_encoder in -lavcodec... (cached) no checking for mpeg4_encoder in -lavcodec... no checking for h264_decoder in -lavcodec... no I think the "no" checks are the causes. Is " -lavcodec" are passed to ffmpeg as its arguments to check if it support the codecs? I check the ffmpeg's option and only find that ffmpeg has a similar option "codec" which list out all its suport codes where I find h264. There goes what I want to seek help: 1. The oh323tut require a wav file. What's its effects, a tmp file as a buff? The web says it requires the format 16 bit with 8000 Hz and I use cool edit software to produce such a wav file but the program still report wrong file format error. So I got stuck. 2. How can I catch video from my computer camera. I can't run the h323plus sample "simple", it crash when come to the call PVideoInputDevice::GetDeviceCapabilities in arg initialization. I debug and found that the ptlib function calls in a cycle: A call B; B call C; C call A. Then the stack runs out. So, what's the trouble here? How can I get my device name pass it to the program instead of "*"? If pass -v option with "/dev/video0" or "USB2.0 Camera" it will says that: Using video driver USB2.0 Camera No Video Grabber available Disabling Video Support! And the audio also has some problem: Could not open sound device Null Audio - Check permissions or full duplex capability. Then I type c: Using video driver USB2.0 Camera No Video Grabber available Disabling Video Support! Last but not least, I want to ask Is there any detailed tutorial to learn. I search the net using google, the valuable one is almost only the oh323tut. But the oh323tut is a little too simple. It only shows the audio feature. How is the video? The simple sample shows an example I guess I can try to understand. Is there any related code or project using H323plus, for example using glade to show the video. A big job without a good explanation is less power full then something is useful and simple. By contract, Glade has many tutorial if one searches the net. I really really get stuck. Hope to receive from you! Thank you!! Best regards Yincheng Li South China Normal University ------------------

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help
by 李银城 05 Apr '14

05 Apr '14

Dear H323plus Team: I want to report some bugs(maybe) and seek help, for these days I'm installing the package and come across some problem. The first thing I want to mention is that when compiling the h235auth.cxx file, error occurs: [CC] h235auth.cxx h235auth.cxx: In member function ‘void H235Authenticators::PrepareSignalPDU(unsigned int, PASN_Array&, PASN_Array&, PINDEX) const’: h235auth.cxx:449:39: error: ‘m_maxTokenLength’ was not declared in this scope PINDEX keyLength = (max_keyLength > m_maxTokenLength) ? m_maxTokenLength : max_keyLength; I trace the source file and find that "m_maxTokenLength" actually defined in h235auth.h, but with a precompile header #ifdef H323_H235. Problem is that the function error occuring function PrepareSignalPDU doesn't wrapped by that header and use the wrapped variables which may not be defined. So if one can make the H323_H235 available, it will be cured. I trace through and find that this header require #define OPENSSL, so I install the package on windows(XP) then it really compile well. But on my Ubuntu, still fails. So I make the undefind variables out the precompile section and then the "make" progresses smoothly but I don't know what consequences will be. Secondly, I want to enable h263 feature, it requires the ffmpeg codec and I install the newest version 2.2. But it didn't work. Configure says: checking for LIBAVCODEC... yes configure: libavcodec stack align hack disabled checking for h263p_encoder in -lavcodec... no checking for h263p_encoder in -lavcodec... (cached) no checking for mpeg4_encoder in -lavcodec... no checking for h264_decoder in -lavcodec... no I think the "no" checks are the causes. Is " -lavcodec" are passed to ffmpeg as its arguments to check if it support the codecs? I check the ffmpeg's option and only find that ffmpeg has a similar option "codec" which list out all its suport codes where I find h264. There goes what I want to seek help: 1. The oh323tut require a wav file. What's its effects, a tmp file as a buff? The web says it requires the format 16 bit with 8000 Hz and I use cool edit software to produce such a wav file but the program still report wrong file format error. So I got stuck. 2. How can I catch video from my computer camera. I can't run the h323plus sample "simple", it crash when come to the call PVideoInputDevice::GetDeviceCapabilities in arg initialization. I debug and found that the ptlib function calls in a cycle: A call B; B call C; C call A. Then the stack runs out. So, what's the trouble here? How can I get my device name pass it to the program instead of "*"? Last but not least, I want to ask Is there any detailed tutorial to learn. I search the net using google, the valuable one is almost only the oh323tut. But the oh323tut is a little too simple. It only shows the audio feature. How is the video? The simple sample shows an example I guess I can try to understand. Is there any related code or project using H323plus, for example using glade to show the video. Best regards Yincheng Li South China Normal University ------------------

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h235 secure with extended video
by 오부경 26 Feb '14

26 Feb '14

Hi. I think, h323plus does not support secure mode for extended video. Do you have schedule for extended video security? BooKyung, Oh.

2 1

OLC requests missing some information
by Ankur Deep Jaiswal 26 Feb '14

26 Feb '14

Hi, In The OLC for H.264 (generic and extended). in multiplexparameters:h225logicalchannelparameters h323plus does not supply dynamicRTPPalyoadType and mediaPacketization:rtpPayloadtype due to this some clients refuse to display video , if these parameters are not present. any idea on how to implement these. Help appreciated. -- Ankur Deep Jaiswal

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Simpleh323 H239 Issue
by Ankur Deep Jaiswal 25 Feb '14

25 Feb '14

HI, While using H239 in simpleh323 client using connection->OpenH239Channel(). Simpleh323 sends a presentationTokenRequest and after receiving a presentationTokenResponse, replies with a new presentationTokenResponse with indication that functionNotUnderstood. hence H239 fails. Help appreciated. thanks in advance -- Ankur Deep Jaiswal

2 2

GnuGk turns 15, lets discuss where to take it from here
by Jan Willamowius 17 Feb '14

17 Feb '14

Dear community, this year the GNU Gatekeeper will turn 15 (I did the first release on June 29th 1999). Lets discuss where we should take it from here. I have prepared an anniversary survey with a number of questions on gatekeeper features, security and WebRTC etc. (1 page): http://www.gnugk.org/survey-2014.html Of course you can also chime in here on the mailinglist. (Why is it so quiet here lately ?) Regards, Jan -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan(a)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

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Some issues with h323pdu.cxx
by Denis Kochmashev 14 Feb '14

14 Feb '14

Hello! Please correct me if I'm wrong, but 1. It looks like there is a small mistake in h323pdu.cxx which doesn't allow to build h323plus without H.235 being enabled. 2. I've found that 'H323SetAliasAddress(const PString & _name, H225_AliasAddress & alias, int tag)' doesn't allow to set AliasAddress of type h323_ID if it looks like dialedDigits even if _name begins with 'h323:'. For example, if I specify _name = 'h323:12345', alias tag will all the same be dialedDigits because it looks like them. I suggest a small change to H323SetAliasAddress, because now it produces unpredictable results. Thanks, Denis

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