Installing Eumetcast on Linux
NOTE:This page is under construction; might contain errors!
Introduction.
This page describes installation of Eumetcast on Linux. Info is not complete yet. Locations may differ between distro's; here, Fedora is used.
As far as I know there are 2 scripts available for setting up the Eumetcast stuff:
- Eumesat provided script, on CD: dvb-eumetcast
- "Martin Bruchanov" script, on his website: eum_dvb_start, eum_dvb_stop
For more info see also:
website of Martin Bruchanov. and
website of Ernst Lobsiger
My environment:
- Distro: Fedora-8
- Receiver: Opera
Overview of all commands
See for more details below.
| command | function | example
|
| szap | tune dvb-receiver; keep data stream active | szap -c /etc/chan_eumetcast.conf -n 1
|
| dvbnet | routing | dvbnet -a 0 -p 100
|
| ifconfig | PID routing | ifconfig dvb0_0 192.168.240.230
|
| multicast routing | ifconfig dummy0 192.168.238.238 multicast
|
| smcroute | multicast routing | smcroute -a dvb0_0 192.168.1.1 224.223.222.223
|
Installing Opera.
Opera is a USB DVB-receiver. It looks very much like DVBWorld;
biggest difference: red led instead of blue led... (That doesn't mean that the hardware is the same!)
1. Firmware
firmware can be extarcted from the Windows drivers:
2830SCap2.sys
2830SLoad2.sys
You can find them on the CD which comes with the receiver, in subdir. 'driver'.
Copy them to your hdisk.
For extracting there is a perl-script, so extracting could be done under any OS.
See:
get_dvb_firmware
- Hide line numbers (see top-right of page)
- Select all lines of the perl script and copy it into a file called 'get_dvb_firmware'
- chmod +x get_dvb_firmware
- Run in directory containing the windows drivers:
$ ./get_dvb_firmware opera1
Now you have 2 new files:
- dvb-usb-opera-01.fw
- dvb-usb-opera1-fpga-01.fw
Copy these files into:
/lib/firmware
For more information see opera-firmware
2. Activate and tune the receiver.
Needed:
First plug in the receiver. This will initialize:
/dev/dvb/adapter0/dvr0
/dev/dvb/adapter0/demux0
/dev/dvb/adapter0/net0
/dev/dvb/adapter0/frontend0
Now start with: (note: this must keep running!)
$ szap -c /etc/chan_eumetcast.conf -n 1 >> /dev/null &
To show tune results:
$ femon
This will show next info (about 1 line per sec)
status 1f | signal dd32 | snr a122 | ber 000000ca | unc 00000000 | FE_HAS_LOCK
status 1f | signal dc11 | snr a2de | ber 0000008d | unc 00000000 | FE_HAS_LOCK
status 1f | signal dad7 | snr a4c7 | ber 00000089 | unc 00000000 | FE_HAS_LOCK
Some notes about szap/femin:
szap does do several actions:
- Set frequency, high/low band, etc.
- If only this is needed you can add a -x option to the command. szap will then exit; the receiver will stay tuned.
- Monitor signal strength etc., to stdout
- Instead of using this output it's better to redirect szap's stdout to /dev/null, and use femon for monitoring.
Advantage: you can stop femon if desired, change redirection of output etc. without interupting reception.
- Receive data from receiver
- Important: For this it's necessary that szap keeps running. That's what it will do without the -x option.
Stopping needs to be done by killing the process.
Please note that numbers like signal strength and snr normally change all the time.
If all numbers are stable then there is no connection to the receiver;
output of femon is in that case invalid!
Eumetsat script
This script uses a config-file 'eumetcast-channels.cfg' for all IP addresses etc.
3. Configure dvb interfaces
Needed:
- dvbnet (part of distro; located in /usr/bin)
- ifconfig (part of distro; located in /sbin)
For each PID both commands have to be executed:
$ dvbnet -a 0 -p <pidnr>
$ /sbin/ifconfig dvb0_<n> 192.168.240.<230+n>
Example:
$ dvbnet -a 0 -p 100 > /dev/null 2>&1
$ ifconfig dvb0_0 192.168.240.230 > /dev/null 2>&1
$ dvbnet -a 0 -p 300 > /dev/null 2>&1
$ ifconfig dvb0_1 192.168.240.231 > /dev/null 2>&1
...
From now on you can observe incoming packages with a sniffer, e.g. wireshark.
The source address is always:
192.168.1.1
The destination address depends on the channel, distributed using a certain PID.
For pid 100, so dvb0_0, the destination address for the TSL Announcement Channel is:
224.223.222.223
Note that you can have different channels (i.e., destination addresses)
distributed on one PID.
To check activated PID's:
$ dvbnet -l
Found device 0: interface dvb0_0, listening on PID 100
Found device 1: interface dvb0_1, listening on PID 300
4. Configure multicast routing
Needed:
- ifconfig (part of distro; located in /sbin)
- smcroute (part of distro; located in /usr/local/sbin)
First create the Tellicast destination address:
$ /sbin/ifconfig dummy0 192.168.238.238 multicast
And the multicast deamon:
$ /usr/local/sbin/smcroute -d
$ sleep 5
Now, for all needed channels in all PID's do:
$ /usr/local/sbin/smcroute -a dvb0_<n> 192.168.1.1 <ip_addr_of_chan> dummy0
Example:
$ /usr/local/sbin/smcroute -a dvb0_0 192.168.1.1 224.223.222.223 dummy0
$ /usr/local/sbin/smcroute -a dvb0_1 192.168.1.1 224.223.222.21 dummy0
Show routes:
$ /sbin/ip mroute
(192.168.1.1, 224.223.222.21) Iif: dvb0_1 Oifs: dummy0
(192.168.1.1, 224.223.222.223) Iif: dvb0_0 Oifs: dummy0
6. Stopping.
Before unplugging receiver or putting your PC into hibernate best is to stop all traffic:
$ /usr/local/sbin/smcroute -k
$ /sbin/ifconfig dummy0 down
$ /sbin/ifconfig dvb0_0 down
$ /sbin/ifconfig dvb0_1 down
...
$ dvbnet -d dvb0_0
$ dvbnet -d dvb0_1
...
killall szap
7. Debugging.
dvbtraffic should show received packets.
/usr/sbin/tcpdump -v -i dvb0_0
/usr/sbin/tcpdump -v -i dvb0_0
/usr/bin/scandvb -c
8. Current problems with Opera receiver under Linux: Solved.
If dvbtraffic doesn't show traffic, while receiver is tuned and locked correctly,
try following:
- Stop traffic.
- Unplug USB (keep power on)
- Plug USB
- Start traffic.
9. Some messages to check install.
dmesg gives:
opera1 1-6:1.0: no suspend for driver opera1?
dvb-usb: Opera1 DVB-S USB2.0 successfully deinitialized and disconnected.
dvb-usb: found a 'Opera1 DVB-S USB2.0' in cold state, will try to load a firmware
dvb-usb: downloading firmware from file 'dvb-usb-opera-01.fw'
dvb-usb: generic DVB-USB module successfully deinitialized and disconnected.
opera: start downloading fpga firmware dvb-usb-opera1-fpga-01.fw
dvb-usb: found a 'Opera1 DVB-S USB2.0' in warm state.
DVB: registering new adapter (Opera1 DVB-S USB2.0)
dvb-usb: MAC address: 00:e0:4f:00:39:86
DVB: registering frontend 0 (ST STV0299 DVB-S)...
input: IR-receiver inside an USB DVB receiver as /class/input/input12
dvb-usb: schedule remote query interval to 200 msecs.
dvb-usb: Opera1 DVB-S USB2.0 successfully initialized and connected.
/sbin/lsmod gives:
Module Size Used by
stv0299 12873 1
i2c_i801 12113 0
dvb_pll 13637 1
dvb_usb_opera 12745 1
dvb_usb 18509 1 dvb_usb_opera
dvb_core 69481 2 stv0299,dvb_usb
i2c_core 21825 5 dvb_pll,stv0299,dvb_usb_opera,dvb_usb,i2c_i801
"cat /proc/sys/net/ipv4/conf/all/rp_filter" gives:
0