[clug] How do I set up DLNA with MythTV?

[Eyal Lebedinsky]

Here is what I have:

[root at e7 /etc/rc.d]# netstat -anp|grep 1900
udp        0      0 255.255.255.255:1900        0.0.0.0:*           28742/mythbackend
udp        0      0 239.255.255.250:1900        0.0.0.0:*           28742/mythbackend

and also:
[root at e7 ~]# lsof -i4|grep ssdp
mythbacke 28742    root   28u  IPv4 9890447      0t0  UDP 239.255.255.250:ssdp
mythbacke 28742    root   29u  IPv4 9890448      0t0  UDP 255.255.255.255:ssdp

My routing:

[root at e7 /etc/rc.d]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.3.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.2.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0
169.254.0.0     0.0.0.0         255.255.0.0     U     1002   0        0 eth1
169.254.0.0     0.0.0.0         255.255.0.0     U     1003   0        0 eth0
224.0.0.0       0.0.0.0         240.0.0.0       U     0      0        0 eth0	<<<<<
0.0.0.0         192.168.2.5     0.0.0.0         UG    0      0        0 eth1

This route covers the whole multicast range.

stracing mythbackend shows an idle process on a 'poll' (but not on fds 28/29)
that times-out every minute or so. It does not show any reaction to the
incoming udp packets. Maybe they get lost earlier?

Pinging all-hosts:
# ping 224.0.0.1
gets nothing, should it not get a reply from this host?

BTW, about my switch, it must be OK because the TV does see another DLNA server,
a w7/MC.

I probably need to look deeper. And understand the technology better :-)

cheers

On 12/08/10 15:47, tridge at samba.org wrote:
> Hi Eyal,
>
>   Lebedinsky writes:
>   >  This is a burst, seen once every 5m from the TV:
>   >  -----------------------------------------
>   >  15:18:01.952410 IP ef.eyal.emu.id.au.blackjack>  239.255.255.250.ssdp: UDP, length 301
>
> do you see mythbackend listening on the ssdp UDP port? (port 1900).
>
> I see this:
>
> netstat -anp|grep 1900
> udp        0      0 239.255.255.250:1900    0.0.0.0:*                           2089/mythbackend
>
> I also have this in my routing table:
>
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 239.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 eth0
>
> If you don't have that, then try this:
>
> /sbin/route add -net 239.0.0.0 netmask 255.0.0.0 eth0
>
> and also check that ifconfig eth0 shows the MULTICAST flag as set
>
> If all of the above looks OK, then check what fd mythbackend is
> listening on 239.255.255.250:1900 using lsof, then use strace to watch
> what happens when the packets come in.
>
> Cheers, Tridge

-- 
Eyal Lebedinsky	(eyal at eyal.emu.id.au)