[LUAU] ubuntu with python can't see multicast traffic

[Brian Chee]

I'll see in a bit when I get back to the ship....seems the shipboard
folks are blocking access tho the worlds for anything other than
email....so downloads of some libraries failed...the hassle is that
they failed quietly.....so today I'm going to bring up my 4g router
and bypass the ship internet connection.

thanks....

Brian

Brian Chee <chee at hawaii.edu> office 808-956-5797


-----Original Message-----
From: Julian Yap [julian_yap at yahoo.com]
Received: Thursday, 19 May 2011, 8:42am
To: LUAU [luau at lists.freesoftwarehawaii.org]
Subject: Re: [LUAU] ubuntu with python can't see multicast traffic



Maybe the required Python libraries aren't installed on your Ubuntu
11.x machine?

If it's a small script then try running all the module imports
manually at the CLI to see if one fails.

- Julian



----- Original Message -----
From: Brian Chee <chee at hawaii.edu>
To: LUAU at lists.freesoftwarehawaii.org
Cc:
Sent: Wednesday, May 18, 2011 2:17 PM
Subject: [LUAU] ubuntu with python can't see multicast traffic

So does anyone know of some sort of magic config item for ubuntu that will
allow a python app to be able to receive mulitcast traffic? Using tcpdump I
can see the IGMP joins and when I use tcpdump using this:

tcpdump ip multicast and not broadcast


I can see the igmp joins in wireshark and then after the briefest of
pauses, the multicast starts up...I'm interested in 225.0.10.13 but
this tcpdump syntax also brings up the other multicast from windows,
etc...


I've also started barking up the apparmor tree, and have gone as far
as building a profile for it...but still not getting the multicast to
the python app, whereas another machine (ubuntu 10.x as opposed to
ubuntu 11.x on this machine) and the multicast data populates the
python app just fine.


/brian chee
_______________________________________________
LUAU at lists.freesoftwarehawaii.org mailing list
http://lists.freesoftwarehawaii.org/listinfo.cgi/luau-freesoftwarehawaii.org

_______________________________________________
LUAU at lists.freesoftwarehawaii.org mailing list
http://lists.freesoftwarehawaii.org/listinfo.cgi/luau-freesoftwarehawaii.org