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Since there is only a single virNetworkDNSDef for any virNetworkDef, and it's trivial to determine whether or not it contains any real data, it's much simpler (and fits more uniformly with the parse function calling sequence of the parsers for many other objects that are subordinates of virNetworkDef) if virNetworkDef *contains* an virNetworkDNSDef rather than pointing to one. Since it is now just a part of another object rather than its own object, it no longer makes sense to have a *Free() function, so that is changed to a *Clear() function. More importantly though, ParseXML and Clear functions are needed for the individual items contained in a virNetworkDNSDef (srv, txt, and host records), but none of them have a *Clear(), and only two of the three had *ParseXML() functions (both of which used a non-uniform arglist). Those problems are cleared up by this patch - it splits the higher-level Clear function into separate functions for each of the three, creates a parse for txt records, and cleans up the srv and host parsers, so we now have all the utility functions necessary to implement virNetworkDefUpdateDNS(Host|Srv|Txt).
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>