[Bug 757488] gst-rtsp-server: multicast functionality is broken if using the same port ranges for multicast and unicast

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=757488

--- Comment #78 from Patricia Muscalu <patricia at axis.com> ---
(In reply to Sebastian Dröge (slomo) from comment #76)
> (In reply to Patricia Muscalu from comment #73)
> > gst_rtsp_stream_get_multicast_address () will only get an address from the
> > address pool if addr_v4 or addr_v6 are null.
> 
> Ah I missed that, thanks! But if I understand this correctly this can happen:
> 1) get_multicast_address(), stores it in the stream then
> 2) alloc_ports_one_family()
> 3) Frees that address from 1) and gets a new one
> 
> I think instead 3) should use that address.

It's not good that we actually can get addresses in two ways. We should
probably only allocate the multicast address in alloc_ports() and return this
address in _get_multicast_address().

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