[Icecast] Metadata configurablity in Icecast

[Geoff Shang]

Hi,

On Fri, 21 Nov 2014, "Thomas B. Rücker" wrote:

> Unrelated to liquidsoap, if you use mountpoint credentials to update
> metadata for a stream, but are on a different IP than the connected
> source client, that will fail.

I would like to request that this be configurable somehow.  I agree that 
this is undesirable under most circumstances, but there are situations 
where this is required.

One example I can think of.  I was working for an organisation that needed 
to track metadata for royalty reporting.  The playout software in use sent 
metadata, including album and record label, to a PHP script via a get 
request.  This script filed it in a MySQL database, along with other 
details like date and time, source IP and listener count, and also passed 
the metadata on to the streaming server.

Such a setup would not work on current Icecast.

Another example was just posted to the mailing list.  The idea of being 
able to put details in a cue file which could be used to send metadata 
during the repeat of a live show.  Rather than needing support in the 
source client, an external utility could be fired off at the same time 
playout commences, and the metadata could be sent at the right time from 
potentially a different IP address.  The above-mentioned database, for 
example, could be used for this sort of thing in addition to its original 
purpose.

There are probably other applications.  I know of at least one regular 
poster to this list who has not upgraded their Icecast installation 
because they rely on this feature.

I would like to suggest a couple of possibilities.

1.  The ability to turn the feature on and off.  This may not be the best 
route but it may be the simplest to implement.

2.  An option to allow metadata from the local host as well as the source 
address.

3.  The ability to specify a whitelist of allowed IP addresses.

Being able to do this on a per mount basis as well as globally would be 
ideal.

Thoughts?

Geoff.