-
Notifications
You must be signed in to change notification settings - Fork 23
/
ReadMe.txt
966 lines (657 loc) · 32.8 KB
/
ReadMe.txt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
Portable Tools Libary
=====================
Contents
--------
1. Introduction
2. Apologies
3. CVS Access
4. Building PTLib
5. Using PTLib
6. IPv6 issues
7. Platform Specific Issues
8. Conclusion
9. Licensing
================================================================================
1. Introduction
---------------
PTLib (Portable Tools Library) is a moderately large class library that has it's
genesis many years ago as PWLib (portable Windows Library), a method to product
applications to run on both Microsoft Windows and Unix systems. It has also been
ported to other systems such as Mac OSX, VxWorks and other embedded systems
Since then the system has grown to include many classes that assist in writing
complete multi-platform applications. Classes for I/O portability, multi-
threading portability, aid in producing unix daemons and NT services portably
and all sorts of internet protocols were added over the years. So it became a
Portable Tools Library and was renamed to PTLib.
All this over and above basic "container" classes such as arrays, linear lists,
sorted lists (RB Tree) and dictionaries (hash tables) which were all created
before STL was standardized. Future versions of PTLib will see many of these
classes replaced or supplemented by STL.
The library was used extensively for all our in-house products. Then we decided
to support the Open H323 project by throwing in some of the code written for
one of our products. Thus, required PTLib so it got thrown into the open source
world as well.
================================================================================
2. Apologies (not)
------------------
As you start using the library, the inevitable question "why did they do it that
way?" will come up. The more experienced out there will know that there are
several reasons for the way things are:
* Carefully considered design,
* Workarounds for portability and compiler subtleties,
* History, it may be too hard to change an early design decision,
* Complete arbitrariness, the absence of any compelling reason.
So, when you ask the next question "why didn't you do it this way?" The answer
will be one of the above. The last one being a synonym for "we didn't think of
that!"
The bottom line is, use the library as is or change it as you require. You can
even send in suggestions for improvements (or merely changes) and we may (or may
not) include them in the base line code. Just do not send us any mail starting
with the words "Why did you..." as the answer is quite likely to be "Because!"
================================================================================
3. SVN Access
-------------
There is a public SVN archive available at svn.sourceforge.net. To extract, use a
command line like the following:
cvs -z3 -d :pserver:[email protected]:/cvsroot/openh323 co module
where "module" is one of the module names specified above.
If you would like see the structure of the CVS, then use the View CVS tool at:
http://cvs.sourceforge.net/viewcvs.py/openh323/
================================================================================
4. Building PTLib
-----------------
This library is multi-platform, however there are only two major build systems
that are used. The Microsoft DevStudio environment for Windows and the GNU make
system for all of the various unix systems.
SPECIAL NOTE FOR MSVC 6 USERS:
------------------------------
If you are using MSVC 6 then please run the "msvc6_upgrade.bat" script in the
PTLib top directory before continuing. If you skip this step, you will not
be able to compile PTLib on MSVC 6. If you change the build environment to bypass
this step, then DLL versions of PTLib will not function correctly. For more
information, please see:
http://www.voxgratia.org/docs/ptlib_windows.html#msvc_headers
Actually, better yet, UPGRADE YOUR COMPILER!!!!
4.1. For Windows
----------------
Note that more complete instructions can be found at the following URL, but here
are the basics:
http://www.voxgratia.org/docs/ptlib_windows.html
1. Note you will need the bison and flex tools to compile some parts of the
system. You can get a copy from http://www.openh323.org/bin/flexbison.zip,
follow the instructions included in that package and put the executables
somewhere in your path.
2. Start DevStudio .NET 2003 or .NET 2005. MSVC v6 may work, but is no longer
actively supported. If you have another compiler you are on your own! Add
these directories to the Include Files path as follows:
In VisualStudio v7/8, go into the Tools menu, Options item. In the Options
dialog, open the Projects folder, VC++ Directories item. In the 'Show
Directories for:' list, select 'Include files'.
C:\PTLib\Include
Add the following to the Lib Files path and the Executable Files path:
C:\PTLib\Lib
The Lib folder is created as parts of PTLib are built. Also add this
directory to your PATH environment variable (so the MergeSym tool can
be found).
3. Open the ptlib.sln or ptlib_2005.sln file for DevStudio 2003 or 2005
respectively.
4. Select Release mode and build MergeSym.
The build should automatically create a file ptlib/include/ptbuildopts.h
via the configure.exe program that should be in the ptlib directory. If
you have any problems try running the program directly from a command
line. Use ".\configure --help" to get information on options such as
forcing a feature or library dependency.
The above will search the entire hard disk(s) for software packages to
configure. This may take some time, so a useful feature is to set the
environment variable:
PTLIB_CONFIGURE_OPTIONS = --no-search
which will only search some "standard" locations. Not ethat you could
also include arguments to set the paths of packages that are not in
standard locations.
Note there are additional notes in the "Platform Specific Issues" on how
to compile the various libraries in a manner suitable for use by PTLib
under Windows.
5. You can then build the entire solution for Release, Debug and No Trace
versions as you require.
5. That's it, now you're on your own!
These are the project relationships:
project dependencies output
------- ------------ ------
Console (none) ptlibs.lib
MergeSym ptlibs.lib mergesym.exe
PTLib ptlibs.lib, mergesym.exe ptlib.dll & lib
XMLRPC ptlibs.lib, ptclib.lib xmlrpc.exe
Debug versions append 'd' to filename, ie: ptlibsd.lib.
MSDevWizard will not build in VisualStudio v7 and so is not included as a project.
--------------------------------------------------------------------------------
4.2. For unix.
--------------
1. If you have not put ptlib it into your home directory (~/ptlib) then
you will have to define the environment variable PTLIBDIR to point to
the correct directory.
Also make sure you have added the PTLib lib directory (e.g.
$PTLIBDIR/lib_linux_x86) to your LD_LIBRARY_PATH environment variable
if you intend to use shared libraries (the default).
2. Build the debug and release versions of the PTLib library as follows:
cd ~/ptlib
./configure
make
This may take some time. Note, you will need bison and flex for this to
compile, most unix systems have these. WARNING: there is a bug in most
of the bison.simple files. See below for details.
PTLib requires GNU Make. If GNU Make (gmake) is not your default make
program (eg FreeBSD users), you will need to install GNU Make first
and then use
cd ~/ptlib
./configure
gmake
If you are getting huge numbers of errors during the compile, then it
is likely your platform is not supported, or you have incorrectly set
the OSTYPE and MACHTYPE variables.
3. That's all there is to it, you are now on your own!
Bison problem under Unix
The bison.simple file on many releases will not compile with the options used
by the PTLib getdate.y grammar. The options are required to make the date
parser thread safe so it is necessary to edit the bison.simple file to fix the
problem.
The file is usually at /usr/lib/bison.simple but in the tradition of unix
could actually be anywhere. We leave it up to you to find it.
The code:
/* Prevent warning if -Wstrict-prototypes. */
#ifdef __GNUC__
int yyparse (void);
#endif
should be changed to
/* Prevent warning if -Wstrict-prototypes. */
#ifdef __GNUC__
#ifndef YYPARSE_PARAM
int yyparse (void);
#endif
#endif
To prevent the incorrect function prototype from being defined. The getdate.y
should then produce a getdate.tab.c file that will actually compile.
================================================================================
5. Using PTLib
--------------
What documentation there is consists of this document and all of the header
files. It was intended that a post processer go through the header files and
produces HTML help files, but this never got completed.
5.1. Tutorial
-------------
Detailed tutorials will almost certainly not be forthcoming. However, at least
giving you an indication on how to start an application would be useful, so
here is the infamous "Hello world!" program.
// hello.cxx
#include <ptlib.h>
class Hello : public PProcess
{
PCLASSINFO(Hello, PProcess)
public:
void Main();
};
PCREATE_PROCESS(Hello)
void Hello::Main()
{
cout << "Hello world!\n";
}
// End of hello.cxx
The CREATE_PROCESS macro actually defines the main() function and creates an
instance of Hello. This assures that everything is initialised in the correct
order. C++ does initialisation of global statics badly (and destruction is even
worse), so try to put everything into your PProcess descedent rather than
globals.
A GUI application is very similar but is descended off PApplication rather than
PProcess, and would create a window as a descendent off the PMainWindow class.
The following is a simple Makefile for Unix platforms for the hello world
program.
# Simple makefile for PTLib
PROG = hello
SOURCES = hello.cxx
ifndef PTLIBDIR
PTLIBDIR=$(HOME)/ptlib
endif
include $(PTLIBDIR)/make/ptlib.mak
# End of Makefile
--------------------------------------------------------------------------------
5.2. PTlib Classes
------------------
The classes in PTLib fall into the following broad categories
Containers
I/O
Threads & Processes
5.2.1. Containers
While there are a number of container classes you wourld rarely actually descend
off them, you would use macros that declare type safe descendents. These are
simply templates instantiations when using a compiler that supports templates
in a simple manner (GNU C++ does not qualify in our opinion).
5.2.2. I/O
There are many classes descendend from a basic primitive call a PChannel, which
represents an entity for doing I/O. There are classes for files, serial ports,
various types of socket and pipes to sub-processes.
5.2.3. Threads & Processes
These classes support lightweight threading and functionality to do with the
process as a whole (for example argument parsing). The threading will be
pre-emptive on platforms that support it (Win32, platforms with pthreads eg
Linux and FreeBSD) and cooperative on those that don't.
================================================================================
6. IPv6 support in ptlib
------------------------
The IPv6 support in PTlib is supported and can be enabled or disabled via
the configure program.
When compiled with the IPv6 support, applications using only IPv4 are still
fully backward compatible. PTLib is able to manage simultaneously IPv4 and
IPv6 connections.
--------------------------------------------------------------------------------
6.1. Windows platforms
----------------------
According to microsoft, IPv6 is not supported under 9x, experimental on Win2000,
supported on XP.
You must use a compiler with IPv6 aware includes and libraries:
- VC6 must be patched to support RFC 2553 structure. (See 7.1 and 7.2 for patch)
- .Net should be ok (to be confirmed)
The port as been performed with VC6 patched on a win2000 platform.
For more informations about IPv6 support:
Microsoft IPv6 support:
http://research.microsoft.com/msripv6/
IPv6 for win2000:
http://msdn.microsoft.com/downloads/sdks/platform/tpipv6.asp
IPv6 for XP:
http://www.microsoft.com/windowsxp/pro/techinfo/administration/ipv6/default.asp
6.1.1. Windows platforms: Win2000
---------------------------------
Go to Microsoft win2000 IPv6 tech preview web page.
http://msdn.microsoft.com/downloads/sdks/platform/tpipv6.asp
Download the 'tpipv6-001205.exe' file and read carrefully the faq.
http://msdn.microsoft.com/downloads/sdks/platform/tpipv6/faq.asp
This program is designed for win2000 English Service pack 1.
To install it on newer Service pack, you have to modify some files.
Again, read the Faq.
This install the IPv6 driver and the IPv6 includes.
6.1.2. Windows platforms: XP
----------------------------
Read the IPv6 faq for windows XP
http://www.microsoft.com/windowsxp/pro/techinfo/administration/ipv6/default.asp
The 'ipv6 install' command installs only the IPv6 drivers.
You need to install additionnals IPv6 includes for VC6.
.NET should be ready. (to be confirmed ....)
6.1.3. Compiling
----------------
To compile ptlib and openh323 with the IPv6 support you have to set an
environment variable:
IPV6FLAG=1
Set it using: [Start]/[Configuration pannel]/[System]/[Environment]
Add the IPv6 SDK include path in your Visual C++ 6 environment:
[Tools]/[Options]/[Directories]/[Include files]
--------------------------------------------------------------------------------
6.2. Linux platforms
--------------------
Recent Linux distributions support IPv6.
2.4 kernels are IPv6 aware.
Linux IPv6 Faq:
http://www.tldp.org/HOWTO/Linux+IPv6-HOWTO/
6.2.1. Enabling IPv6 support
----------------------------
IPv6 can be compiled statically in the kernel or compiled as a module.
To load the IPv6 module, as 'root'
#modprobe ipv6
6.2.2. Compiling
--------------
Check that IPv6 is really on
#ls /proc/net/if_inet6
If this file exists, then IPv6 support is compiled in ptlib and openh323.
--------------------------------------------------------------------------------
6.3. Testing
------------
The test application sources can be found in the directory: openh323/samples/simple
Once compiled the binaries are in simple/debug, release, obj_linux_x86_d, or
obj_linux_x86_r.
Under windows, the test application is simple.exe
Under linux, the test application is simh323
IPv6 support can be tested on only one machine. Just open two shell/command windows.
6.3.1. IPv6 Address and port notation
-------------------------------------
IPv4 address and port are written in dot notation: xx.xx.xx.xx:4000
IPv6 global address are written in semi-colon notation: [xx:xx:xx:xx::xx]:4000
IPv6 scoped address ad a field for the scope: [xx:xx:xx:xx::xx%scope]:4000
Exemples:
Global address
[3ffe:0b80:0002:f9c1:0000:0000:500b:0ea5]:4000
[3ffe:0b80:0002:f9c1::500b:0ea5]:4000
Scoped address
[fe80::232:56ff:fe95:315%lnc0]:4000
Scoped address are not supported yet.
6.3.2. Tests configuration
--------------------------
Tests 1,2,3 run on a single dual stack machine.
IPv4 Address: 127.0.0.1, 10.0.0.6
IPv6 Address: ::1, 3ffe:0b80:0002:f9c1:0000:0000:500b:0ea5
Tests 4,5,6 run on two dual stack machine.
PC1
IPv4 Address: 10.0.0.6
IPv6 Address: ::1, 3ffe:0b80:0002:f9c1:0000:0000:500b:0ea5
PC2
IPv4 Address: 10.0.0.8
IPv6 Address: ::1, 3ffe:0b80:0002:f9c1:0000:0000:500b:0eb6
6.3.3. Test 1: IPv4 <--> IPv4 local call
----------------------------------------
This test checks the backward compatibility with IPv4
In first shell/command window, listen on 127.0.0.1, wait for a call.
simple.exe -tttt -n -i 127.0.0.1 -l -a
In second shell/command window, listen on 10.0.0.6, call 127.0.0.1
simple.exe -tttt -n -i 10.0.0.6 -n 127.0.0.1
6.3.4. Test 2: IPv6 <--> IPv6 local call
----------------------------------------
This test checks the IPv6 support
In first shell/command window, listen on ::1, wait for a call.
simple.exe -tttt -n -i ::1 -l -a
In second shell/command window, listen on IPv6 address, call ::1
simple.exe -tttt -n -i 3ffe:0b80:0002:f9c1:0000:0000:500b:0ea5 -n [::1]
6.3.5. Test 3: IPv4 <--> IPv6 local call
----------------------------------------
This test checks that simultaneous IPv4 and IPv6 calls are supported.
In first shell/command window, listen on 127.0.0.1, wait for a call.
simple.exe -tttt -n -i 127.0.0.1 -l -a
In second shell/command window, listen on IPv6 address, call 127.0.0.1
simple.exe -tttt -n -i 3ffe:0b80:0002:f9c1:0000:0000:500b:0ea5 -n 127.0.0.1
6.3.6. Test 4: IPv4 <--> IPv4 call between two hosts
----------------------------------------------------
This test checks the backward compatibility with IPv4
First host, listen on 10.0.0.6, wait for a call.
simple.exe -tttt -n -i 127.0.0.1 -l -a
Second host, listen on 10.0.0.8, call 10.0.0.6
simple.exe -tttt -n -i 10.0.0.8 -n 10.0.0.6
6.3.7. Test 5: IPv6 <--> IPv6 call between two hosts
----------------------------------------------------
This test checks the IPv6 support
First host, listen on 3ffe:0b80:0002:f9c1:0000:0000:500b:0ea5, wait for a call.
simple.exe -tttt -n -i 3ffe:0b80:0002:f9c1:0000:0000:500b:0ea5 -l -a
Second host, listen on 3ffe:0b80:0002:f9c1:0000:0000:500b:0eb6, call 3ffe:0b80:0002:f9c1:0000:0000:500b:0ea5
simple.exe -tttt -n -i 3ffe:0b80:0002:f9c1:0000:0000:500b:0eb6 -n [3ffe:0b80:0002:f9c1:0000:0000:500b:0ea5]
6.3.8. Test 6: IPv4 <--> IPv6 call between two hosts
----------------------------------------------------
This test checks that simultaneous IPv4 and IPv6 calls are supported.
First host, listen on 10.0.0.6, wait for a call.
simple.exe -tttt -n -i 10.0.0.6 -l -a
Second host, listen on 3ffe:0b80:0002:f9c1:0000:0000:500b:0eb6, call 10.0.0.6
simple.exe -tttt -n -i 3ffe:0b80:0002:f9c1:0000:0000:500b:0eb6 -n 10.0.0.6
--------------------------------------------------------------------------------
6.4. Known limitations
--------------------
You must use IPv6 address with global scope. Tests with IPv6 local link address
fail.
--------------------------------------------------------------------------------
6.5. Questions
--------------
6.5.1. How to patch my VC6 includes files ?
-----------------------------------------
To patch you Developper studio Visual C++ version 6, just edit the file
"C:\Program Files\Microsoft Visual Studio\VC98\Include\ws2tcpip.h", and add
the sin6_scope_id field in the sockadd_in6 structure.
struct sockaddr_in6 {
short sin6_family; /* AF_INET6 */
u_short sin6_port; /* Transport level port number */
u_long sin6_flowinfo; /* IPv6 flow information */
struct in_addr6 sin6_addr; /* IPv6 address */
u_long sin6_scope_id; /* scope id (new in RFC2553) */ <--- Add this one
};
This may have an impact on you system stability, use it only on
experimental platforms. Using .NET compiler should be a better solution.
6.5.2. Why do I need to modify my Visual C++6 include files ?
-----------------------------------------------------------
Visual Studio C++ version 6 implements the old RFC 2133 in file "ws2tcpip.h".
RFC 2133 defines a 24 byte sockaddr_in6 structure.
struct sockaddr_in6 {
short sin6_family; /* AF_INET6 */
u_short sin6_port; /* Transport level port number */
u_long sin6_flowinfo; /* IPv6 flow information */
struct in_addr6 sin6_addr; /* IPv6 address */
};
This RFC as been replaced by RFC 2553.
RFC 2133 defines a 28 byte addsock_in6 structure.
struct sockaddr_in6 {
short sin6_family; /* AF_INET6 */
u_short sin6_port; /* Transport level port number */
u_long sin6_flowinfo; /* IPv6 flow information */
struct in_addr6 sin6_addr; /* IPv6 address */
u_long sin6_scope_id; /* scope id (new in RFC2553) */
};
6.5.3. How to get an ipv6 address with a Global scope ?
-----------------------------------------------------
6.5.3.1. Manually
-----------------
Set one manually if you're not connected to IPv4 Internet or IPv6 backbone:
#ip -6 addr add 3ffe:0b80:0002:f9c1:0000:0000:500b:0ea5 dev eth0
(this address is owned by freenet6.net).
Check the address is set.
#ifconfig
eth0 Lien encap:Ethernet HWaddr 00:08:D5:10:C7:BB
inet adr:12.0.0.2 Bcast:12.255.255.255 Masque:255.0.0.0
adr inet6: 3ffe:b80:2:f9c1::500b:ea5/128 Scope:Global <- - - Ok, Global scope
adr inet6: fe80::208:c7ff:fe59:bbc7/10 Scope:Lien <- - - [ Can't use this one ]
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:9 errors:0 dropped:0 overruns:9 carrier:0
collisions:0
RX bytes:0 (0.0 b) TX bytes:534 (534.0 b)
6.5.3.2. Tunnel broker
----------------------
Get one from a free IPv6 tunnel broker.
Exemple:
http://www.freenet6.net : Canadian tunnel broker
http://tb.ngnet.it : Italian tunnel broker (Telecom Italia Research)
Note: The current (10/2002) freenet6 windows binary is buggy, use it to get the
values, and set manually your tunnel.
--------------------------------------------------------------------------------
6.6. Troubles
------------
6.6.1. Listen on ::1:1720 failed: Address family not supported by protocol
-----------------------------------------------------------------------
IPv6 module is not loaded in the kernel.
#modprobe ipv6
6.6.2. SimpleH323 TCP Could not open H.323 listener port on 1720
--------------------------------------------------------------
Add some traces: -t on the command line.
6.6.3. SimpleH323 TCP Listen on fe80::2b0:d0ff:fedf:d6bf:1720 failed: Invalid argument
------------------------------------------------------------------------------------
This address is a local scope address. As the scope_id field is always set to 0,
its value is invalid.
Use address with global scope.
================================================================================
7. Platform Specific Issues
---------------------------
PTLib has been ported to several platforms. However on some systems not all of
the functionality has been implemented. This could be due to lack of support
at the OS level or simply due to lack of time or documentation when developing
the port.
--------------------------------------------------------------------------------
7.1. FreeBSD Issues
-------------------
Port Maintained by Roger Hardiman <[email protected]>
GetRouteTable() in socket.cxx has been added. It is used by
OenH323Proxy, but is not fully tested.
--------------------------------------------------------------------------------
7.2. OpenBSD Issues
-------------------
Port Maintained by Roger Hardiman <[email protected]>
GetRouteTable() in socket.cxx has been added. It is used by
OenH323Proxy, but is not fully tested.
--------------------------------------------------------------------------------
7.3. NetBSD Issues
------------------
Port Maintained by Roger Hardiman <[email protected]>
GetRouteTable() in socket.cxx has been added. It is used by
OenH323Proxy, but is not fully tested.
There are now three ways to do pthreads in NetBSD.
a) unproven threads - from the packages tree.
b) GNU pth threads - from the packages tree.
c) Native pthreads - added to the kernel on 15th January 2003.
The choice can be made by editing ptlib/make/unix.mak
Native threads is the default and the best solution.
--------------------------------------------------------------------------------
7.4. Mac OS X (Darwin) Issues
-----------------------------
Port maintained by Roger Hardiman <[email protected]> but recently
Shawn Pai-Hsiang Hsiao <[email protected]> has been leading
development.
Threads cannot be suspended once they are running, and trying to Suspend
a running thread will generate an Assertion Error.
Theads can be created in 'suspended' mode and then started with Resume
This is due to a lack of pthread_kill() in Dawrin 1.2
See http://www.publicsource.apple.com/bugs/X/Libraries/2686231.html
GetRouteTable() in socket.cxx has been added. It is used by
OenH323Proxy, but is not fully tested.
localtime_r() and gm_time() are missing.
So in osutil.cxx I have implemented os_localtime() and os_gmtime()
with localtime() and gm_time() which may not be thread safe.
There is also no implementation for dynamic library functions.
Audio is supported using the coreaudio library.
Video support is being added by Shawn and users interested in this should
check Shawn's web site at http://sourceforge.net/projects/xmeeting/
--------------------------------------------------------------------------------
7.5. BeOS Issues
----------------
Port Maintained by Yuri Kiryanov <[email protected]>.
Current version supported is BeOS 5.0.2.
Most important issue is lack of variable sample frequency from system sound producer node.
I made quite a few attempts to implement sound resampler in code,
even with help of Be engineers, but eventually decided to wait until new Media Kit
with resampler built-in.
Also network code needed more things, as OOB, which was promised in BONE.
BONE will allow to make less #defines in network code as well.
As update will hit the Net, I'll get back to it ASAP.
Look for more port-related info on http://www.dogsbone.com/be
--------------------------------------------------------------------------------
7.6. Windows CE Issues
----------------------
There is a very old port that was maintained by Yuri Kiryanov <[email protected]>.
for 2.x and 3.x (PocketPC). But this is no longer supported. You are on your own.
Look for more port-related info on http://www.pocketbone.com
For Windows Mobile 5 and Windows Mobile 6 these are supoported via DevStudio 2005,
just follow the normal isntractions for Windows builds.
--------------------------------------------------------------------------------
7.7. Solaris Issues
-------------------
On Solaris 8, you need to install GNU Ld (the loader) to get
shared libraries to compile. (otherwise there is an error with -soname)
You can get around this by using the static libraries and
compiling with make optnoshared and make debugnoshared
There is currently no implementation of GetRouteTable() in socket.cxx
so OpenH323Proxy will not work.
--------------------------------------------------------------------------------
7.8. Build libraries under Windows
----------------------------------
Unfortunately building libraries that were intended for Unix based systems
under Windows can sometimes be difficult. Here are some notes on the subsystems
that PTLib uses.
7.8.1. OpenSSL under Windows
----------------------------
The standard build for OpenSSL off http://www.openssl.org does work though it
is rather tricky and requires things like Perl to be installed on your
Windows box. However the build does work and is correct for PTlib use. Make
sure you build the non-DLL Debug and Release versions.
7.8.2. EXPAT under Windows
---------------------------
The easiest way is to get the one in the OpenH323 CVS. This is guranteed to
work. Use the following command to do this:
cvs -d :pserver:[email protected]:/cvsroot/openh323 co external/expat
and then use the expat.dsw file to build the Debug and Release libraries.
7.8.3. OpenLDAP under Windows
---------------------------
To use OpenLDAP with PTLib you have to compile the OpenLDAP library as a DLL.
Unfortunately, the standard distribution does not do this. So there is a file in
PTLib called ptlib/tools/openldap-2.1.12-win32.zip which contains altered build
files for that version of OpenLDAP. Note if you have a different version these
files may not work.
To build the DLL:
1 Get OpenLDAP v 2.1.17 via tar file at
ftp://ftp.openldap.org/pub/OpenLDAP/openldap-release/openldap-2.1.17.tgz
or anonymous CVS using tag at
:pserver:[email protected]:/repo/OpenLDAP
using tag OPENLDAP_REL_ENG_2_1_17
2 Unpack it somewhere, eg c:\work\openldap
3 Unzip the openldap-2.1.17-win32.zip file that directory
4 Open openldap/build/main.dsw
5 use Batch build to and select the "dll" project and build the "DLL Debug"
and "DLL Release" targets.
6 Put the resulting openldap/DLLRelease/openldap.dll and
openldap/DLLDebug/openldapd.dll files in your path.
7.8.4 SDL under Windows
-----------------------
Version 1.2.5 has support for Windows and MSVC so you just need to download it
from http://www.libsdl.org/ and follow the build instructions.
7.8.5 SASL under Windows
------------------------
The standard distribution of Cyrus SASL comes with makefiles for Windows and
clear instructions on how to build the library. The current implementation
in PTLib was tested with Cyrus SASL version 2.1.18. Tarballs can be downloaded
from:
http://asg.web.cmu.edu/sasl/sasl-library.html
--------------------------------------------------------------------------------
7.9. ESD (Esound)
-----------------
Most targets come with native sound support.
However there is also support for the ESD (esound) daemon which provides
full duplex audio via network sockets.
To compile ptlib to use ESD, you need to set the ESDDIR environment variable
to point to the directory you have installed ESD into.
Then compile ptlib.
================================================================================
8. Conclusion
-------------
This package is far from a "product". There is very limited documentation and
support will be on an ad-hoc basis, send us an e-mail and we will probably
answer your question if it isn't too difficult.
It is supplied mainly to support the open H323 project, but that shouldn't stop
you from using it in whatever project you have in mind if you so desire. We like
it and use it all the time, and we don't want to get into any religious wars of
this class library over that one.
================================================================================
9. Licensing
------------
The bulk of this library is licensed under the MPL (Mozilla Public License)
version 1.0. In simple terms this license allows you to use the library for
any purpose, commercial or otherwise, provided the library is kept in tact
as a separate entity and any changes made to the library are made publicly
available under the same (MPL) license. It is important to realise that that
refers to changes to the library and not your application that is merely
linked to the library.
Note that due to a restriction in the GPL, any application you write that
uses anything another than GPL, eg our library with MPL, is technically in
breach of the GPL license. However, it should be noted that MPL does not
care about the license of the final application, and as only the author of
the GPL application is in breach of his own license and is unlikely to sue
themselves for that breach, in practice there is no problem with a GPL
application using an MPL or any other commercial library.
The random number generator is based on code originally by Bob Jenkins.
Portions of this library are from the REGEX library and is under the
following license:
Copyright 1992, 1993, 1994, 1997 Henry Spencer. All rights reserved.
This software is not subject to any license of the American Telephone
and Telegraph Company or of the Regents of the University of California.
Permission is granted to anyone to use this software for any purpose on
any computer system, and to alter it and redistribute it, subject
to the following restrictions:
1. The author is not responsible for the consequences of use of this
software, no matter how awful, even if they arise from flaws in it.
2. The origin of this software must not be misrepresented, either by
explicit claim or by omission. Since few users ever read sources,
credits must appear in the documentation.
3. Altered versions must be plainly marked as such, and must not be
misrepresented as being the original software. Since few users
ever read sources, credits must appear in the documentation.
4. This notice may not be removed or altered.
The in-band DTMF decoding code was taken from FreeBSD's dtmfdecode.c
application written by Poul-Henning Kamp. It has the following
license:
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <[email protected]> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
================================================================================
Equivalence Pty. Ltd.
Home of OpenH323 and the Open Phone Abstraction Library (OPAL)
http://www.equival.com.au (US Mirror - http://www.equival.com)
================================================================================