- FreeSWITCH-dev - FreeSWITCH Mailing Lists

mod_gsmopen, now with USB dongle support (SMSs and Voice calls to/from Cellular Networks)
by Giovanni Maruzzelli 20 Apr '12

20 Apr '12

Hello FreeSWITCHers, the new version of GSMopen is basically usable, and the docs at the wiki almost up to date (barring the details of the config file, you don't need them now :) ). Good news is that GSMopen now supports Huawei E1550 and compatible dongles, that are cheap (roughly $20 on Ebay) and reliable. Thanks to dongle's pcm serial streaming via USB, no more need for sound hacks, ALSA, or any sound subsystem (and cpu load). All is digital. It's reasonable to expect to be able to support many dozen concurrent calls per machine (dongles are USB 2.0 compliant). Works well right now on Linux and Windows, and would probably works on *BSD and OSX with minor tweaks. Code will be polished, refactured, rewritten, etc. But the thing is there. So, please update your source code to latest git, have a look at the wiki page, build mod_gsmopen, connect a dongle to your machine, and begin catching bugs and documentation inaccuracies. And asking for features for your use cases. Thanks to you all in advance, it's a pleasure and an honor to be part of this community. http://wiki.freeswitch.org/wiki/Gsmopen -giovanni -- Sincerely, Giovanni Maruzzelli Cell : +39-347-2665618

1 0

Usage of some core channel functions
by Mariusz Czulada 17 Apr '12

17 Apr '12

Hi all, While trying to add some features to mod_conference I found two functions for access channel data: * switch_channel_get_variable(channel, "conference_controls"); This one is clear, but also * switch_channel_get_private(channel, "_conference_autocall_list_"); Can somebody clarify to me (and maybe to others) what is the purpose of this mechanism? What kind of channel data are generally manipulated this way? Are there useable/settable from application level (dialplan or scripts)? Regards, Mariusz

2 1

FreeSWITCH Community Conference Call: DNS Best Practices in a VoIP Environment
by Michael Collins 16 Apr '12

16 Apr '12

Greetings, We'd like to have everyone join us on Wednesday, April 18th for a great presentation to be given by our very own Travis Cross. He will be discussing DNS Best Practices in a VoIP Environment. I'm definitely looking forward to this discussion as this is an important topic and formal documentation isn't too widely dispensed at the moment. I will be taking notes on this discussion and creating a corresponding wiki page. The agenda page is here: http://wiki.freeswitch.org/wiki/FS_weekly_2012_04_18 To make this discussion more meaningful I would like everyone to be willing to share their personal experiences and knowledge, as well as any questions that they have on the subject. We have a number of community members whose skill we can draw upon, and the more questions we ask, the more information we can collect and put into formal documentation. Talk to you this Wednesday! -Michael

1 0

Distorted sound is using record_session with no RECORD_STEREO set, BUG or I'm missing something?
by Anton VG 15 Apr '12

15 Apr '12

Hi, Experimenting with call recording, and noticed that regardless the format used, i'm getting distorted sound in recorings, if there is no RECORD_STEREO set. Is there any prerequsites or this is the bug I should fill in JIRA? Also FS segaults if I try recording file to adpcm format. It records a few frames, and when audio from leg-B comes in (or early media) it segfaults. FS trunk from 31 march 2012.

2 2

Re: [Freeswitch-dev] ESL Ruby/Lua extensions build/linking error
by Philip.Pirozhkov＠ontarget-group.com 11 Apr '12

11 Apr '12

Quoting Philip.Pirozhkov(a)ontarget-group.com: I've figured out how to fix esl rubymod build for both Ruby 1.9 and 1.8 Patch attached. BR, Phil > > BR, Phil > > Quoting Philip.Pirozhkov(a)ontarget-group.com: > >> >> Patch attached. >> I've removed esl_wrap.cpp here since it can always be recreated by swig. >> >> BR, Phil >> >> Quoting Philip.Pirozhkov(a)ontarget-group.com: >> >>> Ok, I screwed up a bit and forgot to call ./configure. But its output >>> makes me sad: >>> freeswitch]$ ./configuregit format-patch -o . >>> 6f87ac55d6db945f7004b528ef8cb0f3e6c0c6f9 >>> configure: error: cannot find install-sh, install.sh, or shtool in >>> build/config "."/build/config >>> >>> Ok, forget it and let's get back to libs/esl and run >>> make rubymod >>> >>> And here we go, ESL.so is finally here! >>> >>> >>> I'll generalise ruby 1.8/1.9 path configuration and will attach a patch. >>> >>> BR, Phil >>> >>> Quoting Philip.Pirozhkov(a)ontarget-group.com: >>> >>>> Okay, I've figured out how to point ld to these ruby libs, and the >>>> error is completely different and it's related to missing ESL.so we are >>>> referring to in these buildfiles. >>>> >>>> >>>> So, aside from all these makefile patches: >>>> >>>> 1. Output of autoconf: >>>> freeswitch]$ autoconf >>>> configure.in:122: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call >>>> detected in body >>>> ../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from... >>>> ../../lib/autoconf/general.m4:2591: _AC_COMPILE_IFELSE is expanded from... >>>> ../../lib/autoconf/general.m4:2607: AC_COMPILE_IFELSE is expanded from... >>>> ../../lib/m4sugar/m4sh.m4:606: AS_IF is expanded from... >>>> ../../lib/autoconf/general.m4:2032: AC_CACHE_VAL is expanded from... >>>> ../../lib/autoconf/general.m4:2053: AC_CACHE_CHECK is expanded from... >>>> configure.in:122: the top level >>>> configure.in:16: error: possibly undefined macro: AM_INIT_AUTOMAKE >>>> If this token and others are legitimate, please use m4_pattern_allow. >>>> See the Autoconf documentation. >>>> configure.in:140: error: possibly undefined macro: AM_PROG_CC_C_O >>>> configure.in:141: error: possibly undefined macro: AC_PROG_LIBTOOL >>>> configure.in:356: error: possibly undefined macro: AM_CONDITIONAL >>>> >>>> 2. Output of automake http://pastebin.com/XFFkNxVg >>>> >>>> Or can anybody send me an ESL.so please? >>>> >>>> BR, Phil >>>> >>>> >>>> Quoting Philip.Pirozhkov(a)ontarget-group.com: >>>> >>>>> Forgot to mention I'm using latest stable Ruby 1.9.3-p0 >>>>> Seems that LOCAL_LDFLAGS is not getting what it expected to, the >>>>> result is >>>>> "-lpthread -lrt -ldl -lcrypt -lm", while it's expecting to get a ruby >>>>> lib dir, prefix it with "-L" and go. But fixing that doesn't help also. >>>>> >>>>> I've tried with Ruby 1.8.7 (with -I and -L patches to makefile only): >>>>> >>>>> ruby]$ make >>>>> swig -module ESL -ruby -c++ -DMULTIPLICITY -I../src/include -o >>>>> esl_wrap.cpp ../ESL.i >>>>> g++ -I/home/pirj/.rvm/rubies/ruby-1.8.7-p352/lib/ruby/1.8/i686-linux >>>>> -I../src/include -c esl_wrap.cpp -o esl_wrap.o >>>>> g++ esl_wrap.o -L/home/pirj/.rvm/rubies/ruby-1.8.7-p352/lib -o >>>>> ESL.so -L. >>>>> /usr/lib/gcc/i686-pc-linux-gnu/4.7.0/../../../crt1.o: In >>>>> function `_start': >>>>> (.text+0x18): undefined reference to `main' >>>>> esl_wrap.o: In function `rb_class_of': >>>>> esl_wrap.cpp:(.text+0x9e3): undefined reference to `rb_cFixnum' >>>>> esl_wrap.cpp:(.text+0x9f0): undefined reference to `rb_cNilClass' >>>>> esl_wrap.cpp:(.text+0x9fd): undefined reference to `rb_cFalseClass' >>>>> ... >>>>> >>>>> >>>>> P.S. ArchLinux, kernel 3.2.14, gcc 4.7.0, SWIG 2.0.4, ld 2.22.0 >>>>> >>>>> Any hints? >>>>> >>>>> BR, Phil >>>>> >>>>> Quoting Philip.Pirozhkov(a)ontarget-group.com: >>>>> >>>>>> Hi all, >>>>>> >>>>>> Trying to build ruby and lua extensions from freeswitch/libs/esl: >>>>>> lua]$ make >>>>>> g++ -Wno-unused-function -c esl_wrap.cpp -o esl_wrap.o >>>>>> esl_wrap.cpp:1510:17: fatal error: esl.h: No such file or directory >>>>>> compilation terminated. >>>>>> make: *** [esl_wrap.o] Error 1 >>>>>> >>>>>> this can be fixed adding >>>>>> -I../src/include to esl_wrap.o task >>>>>> >>>>>> but has ld error then: >>>>>> lua]$ make >>>>>> g++ -Wno-unused-function -I../src/include -c esl_wrap.cpp -o >>>>>> esl_wrap.o >>>>>> g++ esl_wrap.o -llua -lpthread -o ESL.so -L. >>>>>> /usr/lib/gcc/i686-pc-linux-gnu/4.7.0/../../../crt1.o: In >>>>>> function `_start': >>>>>> (.text+0x18): undefined reference to `main' >>>>>> esl_wrap.o: In function `_wrap_new_ESLevent__SWIG_0': >>>>>> esl_wrap.cpp:(.text+0x3974): undefined reference to >>>>>> `ESLevent::ESLevent(char const*, char const*)' >>>>>> esl_wrap.o: In function `_wrap_new_ESLevent__SWIG_1': >>>>>> ... (tl;dr) >>>>>> >>>>>> >>>>>> Same with ruby (even worse), it was failing to find ruby.h and >>>>>> ruby/config.h. I got make esl_wrap.cpp task fixed >>>>>> http://pastebin.com/uKFBZVF3 >>>>>> >>>>>> but there's an ld error again: >>>>>> >>>>>> $ make >>>>>> g++ esl_wrap.o -lpthread -lrt -ldl -lcrypt -lm -L. -rdynamic >>>>>> -Wl,-export-dynamic -o ESL.so -L. >>>>>> /usr/lib/gcc/i686-pc-linux-gnu/4.7.0/../../../crt1.o: In >>>>>> function `_start': >>>>>> (.text+0x18): undefined reference to `main' >>>>>> esl_wrap.o: In function `rb_class_of': >>>>>> esl_wrap.cpp:(.text+0x9ed): undefined reference to `rb_cFixnum' >>>>>> esl_wrap.cpp:(.text+0x9fa): undefined reference to `rb_cTrueClass' >>>>>> >>>>>> Anyone successful with this stuff? >>>>>> I'm not experienced with GCC stuff at all. >>>>>> It would be very nice to pack this Ruby ESL to a gem (ruby >>>>>> package manager). >>>>>> >>>>>> BR, Phil >>>>>> >>>>>> _________________________________________________________________________ >>>>>> Professional FreeSWITCH Consulting Services: >>>>>> consulting(a)freeswitch.org >>>>>> http://www.freeswitchsolutions.com >>>>>> >>>>>> FreeSWITCH-powered IP PBX: The CudaTel Communication Server >>>>>> http://www.cudatel.com >>>>>> >>>>>> Official FreeSWITCH Sites >>>>>> http://www.freeswitch.org >>>>>> http://wiki.freeswitch.org >>>>>> http://www.cluecon.com >>>>>> >>>>>> FreeSWITCH-dev mailing list >>>>>> FreeSWITCH-dev(a)lists.freeswitch.org >>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev >>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev >>>>>> http://www.freeswitch.org >>>>>>

3 3

Why is _thread_cond_timedwait written the way it is?
by Richard Lewis Haggard 11 Apr '12

11 Apr '12

I was looking at _thread_cond_timedwait in thread_code. There is a section of the code that I do not understand the purpose of. Could someone please explain to me what the purpose of the other part of the code is? Before the code enters a loop it serializes access to the passed in cond structure pointer, increments a counter and makes a local copy of a value before releasing the cond again. EnterCriticalSection(&cond->csection); cond->num_waiting++; generation = cond->generation; LeaveCriticalSection(&cond->csection); What is the purpose of 'num_waiting' and 'generation'? The next part looks odd to me. Why does the code unlock the mutex when what is desired is to lock it? apr_thread_mutex_unlock(mutex); The code then enters a do { } while (true); loop. do { The first thing it does is to wait for access to a semaphore. This is a limited time wait and may time out before the event is encountered. The result of this wait is checked later. res = WaitForSingleObject(cond->semaphore, timeout_ms); The 'cond' structure is going to be modified again and the code needs to have exclusive access. EnterCriticalSection(&cond->csection); I do not know what the purpose of this is. Can someone explain it to me? What is the purpose of this particular block? if (cond->num_wake) { if (cond->generation != generation) { cond->num_wake--; cond->num_waiting--; rv = APR_SUCCESS; break; } else { wake = 1; } } else if (res != WAIT_OBJECT_0) { cond->num_waiting--; rv = APR_TIMEUP; break; } If neither 'break' executes then the code releases the critical section. The code would be less obtuse (and smaller) if the two 'break' functions were removed. That would save having duplicate LeaveCriticalSection() functions. In any case, the code releases the critical section. LeaveCriticalSection(&cond->csection); What is the purpose of the next bock? It only executes if the semaphone acquisition was successful but the 'cond->generation' has changed while attempting to determine if it is OK to execute the mutex lock. if (wake) { wake = 0; ReleaseSemaphore(cond->semaphore, 1, NULL); } Note: If the two 'break' statements were removed from above and the following lines added. At this point in the code the critical section would have been released so it would not be necessary to explicitly do so outside of the forever loop. else { break; } Under what conditions can 'cond->generation' change? The bottom of the loop is encountered. } while (1); To get here one of the two 'break' statements must have been hit. The critical section is still locked and must be released. Note: if my suggested changes were implemented then it would not be necessary to have this line: LeaveCriticalSection(&cond->csection); And now, finally, the mutex gets locked. apr_thread_mutex_lock(mutex); ============================== Richard Lewis Haggard

3 2

FreeSWITCH Conference Call Tomorrow, April 11
by Michael Collins 10 Apr '12

10 Apr '12

Hello all! Tomorrow's agenda page is here: http://wiki.freeswitch.org/wiki/FS_weekly_2012_04_11 We are going to be talking about some "what if" scenarios. Feel free to bring your own, but the two specifically that we'll be discussing tomorrow: * What if I host my FS-related project on GitHub? * What if I wanted to build a desk phone with cheap ARM hardware? Please join the conversation and bring your expertise as well as your questions for discussion. Talk to you tomorrow! -Michael

1 0

Fisheye and Jira Upgraded!
by Ken Rice 10 Apr '12

10 Apr '12

Just a quick announcement. As you may have noticed end of the Day US Time on Tuesday April 3rd, Fisheye and Jira were offline for a while. However, I am pleased to report that both have now been upgraded, and a Hardware replacement has happened on both hosts. Please report any issues to me or BKW via the mailing list or join us on the IRC Channel at #FreeSWITCH on irc.freenode.net Thanks for your Support! K

3 2

ClueCon 2012: Call For Speakers
by Michael Collins 10 Apr '12

10 Apr '12

[image: Inline image 2] ClueCon 2012 - Call For Speakers ClueCon - the open source telephony conference by developers, for developers - would like to announce that we are having an open call for speaking proposals for this year's event. If you have an idea for a technical presentation for ClueCon 2012 then we would like to hear about. What makes a great ClueCon presentation? The tech savvy crowd that attends ClueCon loves *technical* presentations. In general, the more technical the presentation, the better. If you are thinking about a presentation then consider these points: - ClueCon talks are 30 minutes in length, including Q&A time with the audience - ClueCon has a special focus on open source VoIP and telephony projects like FreeSWITCH, Asterisk, OpenSIPS, and Kamailio - Attendees enjoy hearing about projects built with open source tools - Highly technical discussions that show the nuts and bolts are especially well-liked - The audience appreciates seeing and participating in live demonstrations Please send your proposals to marketing(a)cluecon.com. Be sure to include a working title, description of the talk, and name of the presenter. Don't delay! There are a limited number of openings. ClueCon 2012 Registration Information ClueCon 2012 registration is now open. Visit the registration page<http://www.cluecon.com/register?cc12cfs>for details. Be sure to book your room at the Wyndham <http://www.cluecon.com/hotels?cc12cfs> and qualify for the $300 discount. As always, feel free to call us at 877.742.CLUE (877.742.2583) if you have any questions about ClueCon 2012. Also, keep in mind that the FreeSWITCH community has a conference call<http://wiki.freeswitch.org/wiki/Weekly_Conference_Call?cc12cfs>each Wednesday at 1PM Eastern time. This is a great opportunity to talk about open source telephony and get to know a number folks who will be at ClueCon 2012. Stay tuned for more news about ClueCon speakers, sponsors, and related events! -- ClueCon Team http://www.cluecon.com 877-7-4ACLUE cc12cfs1

1 0

trailing white spaces in code cleanup suggestions and jira question
by Seven Du 09 Apr '12

09 Apr '12

Hi, Some code has trailing white spaces and I found it's a little hard to manage code locally and keep it up to date with the upstream. Would any interest in cleanup? I could help with 1) one big change that write a script to clean all and 2) change one file/module a time to be safe but takes more time. I understand you are all busy working on the 1.2 branch and maybe causing trouble when merging back and forth. Jira questions: 1) I found jira is not sending alerting email when I create or comment issues recently. 2) Some modules are missing such as mod_fsv and mod_rtmp, is it ok to report to FS-CORE if cannot find a matching entry on jira? Thanks. 7. -- About: http://about.me/dujinfang Blog: http://www.dujinfang.com Proj: http://www.freeswitch.org.cn Sent with Sparrow (http://www.sparrowmailapp.com)

7 13