# File lib/vagrant-libvirt/util/network_util.rb, line 114
        def libvirt_networks(libvirt_client)
          libvirt_networks = []

          active = libvirt_client.list_networks
          inactive = libvirt_client.list_defined_networks

          # Iterate over all (active and inactive) networks.
          active.concat(inactive).each do |network_name|
            libvirt_network = libvirt_client.lookup_network_by_name(
              network_name
            )

            # Parse ip address and netmask from the network xml description.
            xml = Nokogiri::XML(libvirt_network.xml_desc)
            ip = xml.xpath('/network/ip/@address').first
            ip = ip.value if ip
            netmask = xml.xpath('/network/ip/@netmask').first
            netmask = netmask.value if netmask

            dhcp_enabled = if xml.at_xpath('//network/ip/dhcp')
                             true
                           else
                             false
                           end

            domain_name = xml.at_xpath('/network/domain/@name')
            domain_name = domain_name.value if domain_name

            # Calculate network address of network from ip address and
            # netmask.
            network_address = (network_address(ip, netmask) if ip && netmask)

            libvirt_networks << {
              name:             network_name,
              ip_address:       ip,
              netmask:          netmask,
              network_address:  network_address,
              dhcp_enabled:     dhcp_enabled,
              bridge_name:      libvirt_network.bridge_name,
              domain_name:      domain_name,
              created:          true,
              active:           libvirt_network.active?,
              autostart:        libvirt_network.autostart?,
              libvirt_network:  libvirt_network
            }
          end

          libvirt_networks
        end