On 02/04/2010, at 10:39 PM, Philippe d'Anfray wrote:
> Bonjour
>
> Great !! with this test version of VPCScreen, the multicast packets
> are
> given a TTL of 127 and can be received normally at other multicast
> locations (at least in France....) (and also through bridges).
OK, thanks for raising the problem and doing the test Philippe.
And also thanks to Andrew Rowley for suggesting a ttl issue as the
cause of the problem!
This change should be applied to all the various release packages.
Attached below is the patch I've used - it just sets a default ttl of
127. A better fix would be to use whatever the user asks for, so if
anyone has time ....
chris
--- VPMedia/src/VPMSession_net.cpp.orig 2008-09-16 22:09:32.000000000 +1000
+++ VPMedia/src/VPMSession_net.cpp 2010-04-02 01:04:51.718584080 +1000
@@ -8,14 +8,14 @@
bool VPMSession_net::initialised_global = false;
-static const uint16_t DEFAULT_TTL = 16;
+static const uint16_t DEFAULT_TTL = 127;
VPMSession_net::VPMSession_net( const char *_address,
VPMSessionListener &listener ) :
VPMSession( listener ),
address( _address ),
session( 0 ),
- ttl( 16 ),
+ ttl( DEFAULT_TTL ),
bandwidth( 64000 ),
first_packet_time(0),
total_bytes_sent(0),
> Christoph Willing a écrit :
>>
>>
>> Philippe,
>>
>> Could you try some tests with:
>> http://www.vislab.uq.edu.au/debuntu/tests/
>> vpcscreen_0.2-4_amd64.deb
>>
>> You'll have to download manually and use dpkg to install (rather than
>> apt-get etc.):
>> sudo dpkg -i vpcscreen_0.2-4_amd64.deb
>>
>>
>>
>>>>
>>>>
>>>> Anyway, I think I've found the cause in the vpcscreen code and will
>>>> apply a simple minded fix for testing. Would you be able to test
>>>> it? I
>>>> can't easily replicate your problem here to confirm that the fix
>>>> works. If you are able to help with the testing, could you confirm
>>>> that you're using Ubuntu 9.10 and whether you're using 32 or 64bit
>>>> version please, so that I can build the appropriate version for
>>>> you?
>>>>
>
> <Philippe_d-Anfray.vcf>
Christoph Willing +61 7 3365 8316
QCIF Access Grid Manager
University of Queensland
