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[linux-dvb] Re: IP Multicast reception over DVB-T



Thank you for your answer.

The workaround for e.g. dvb-20020408 driver consists in deleting the following line in driver/dvb_net.c:
	dvb->set_multicast_list = dvb_net_set_multi;

Running "tests_sections 2119" yields:

3e b5 4d 06 04 c1 00 00  02 5e 00 01 45 00 05 40    >.M......^..E..@
43 28 40 00 7e 11 0c 8b  c0 a8 03 49 e0 02 04 06    C(@.~......I....
80 02 04 d2 05 2c 9b a3  47 00 44 16 66 e5 c5 e6    .....,..G.D.f...
[...]
3e b5 4d 06 04 c1 00 00  02 5e 00 01 45 00 05 40    >.M......^..E..@
43 29 40 00 7e 11 0c 8a  c0 a8 03 49 e0 02 04 06    C)@.~......I....
80 02 04 d2 05 2c a3 60  47 00 44 1d 12 27 18 55    .....,.`G.D..'.U
[...]
3e b5 4d 06 04 c1 00 00  02 5e 00 01 45 00 05 40    >.M......^..E..@
43 2a 40 00 7e 11 0c 89  c0 a8 03 49 e0 02 04 06    C*@.~......I....
80 02 04 d2 05 2c c8 20  47 00 44 14 3d f0 56 db    .....,. G.D.=.V.
[...]

Is that what you are expecting ?

Thanks,
Bertrand

>>> Johannes Stezenbach <js@convergence.de> 12/08/2003 16:09:40 >>>
Bertrand Mazieres wrote:
> 
> dvb0_1, listening on PID 2119 [i.e. pid carrying multicast stream 224.2.4.6.]
...
> # tethereal -i dvb0_1
> Capturing on dvb0_1
>   0.000000 192.168.3.73 -> 224.2.4.6    UDP Source port: 32769  Destination port: 1234
>   0.035889 192.168.3.73 -> 224.2.4.6    UDP Source port: 32769  Destination port: 1234
>   0.100059 192.168.3.73 -> 224.2.4.6    UDP Source port: 32769  Destination port: 1234
> 
> Can anyone please help ?
> Note that the same problem occurs with linux1.0.0pre2 and pre3 and a
> workaround had to be used on older drivers.

What workaround?

Can you capture a few packets with 'apps/test/test_sections 2119' and
post the first 16 (or so) bytes of each section?

Or alternatively read ETSI EN 301 192 chapter 7 (available for free
from http://www.etsi.org/) and check dvb_net.c?


Johannes


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