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Currently, a listen address for a SPICE server can be specified. Later, when the domain is migrated, we need to relocate the graphics which involves telling new destination to the SPICE server. However, we can't just assume the listen address is the new location, because the listen address can be ANYCAST (0.0.0.0 for IPv4, :: for IPv6). In which case, we want to pass the remote hostname. But there are some troubles with ANYCAST. In both IPv4 and IPv6 it has many ways for specifying such address. For instance, in IPv4: 0, 0.0, 0.0.0, 0.0.0.0. The number of variations gets bigger in IPv6 world. Hence, in order to check for ANYCAST address sanely, we should take the provided listen address, parse it and format back in it's full form. Which is exactly what this patch does.
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>