implemented nic_mac_addresses capability

lib/vagrant-libvirt/action.rb

@@ -286,6 +286,14 @@ module VagrantPlugins
         end
       end
 
+      def self.action_read_mac_addresses
+        Vagrant::Action::Builder.new.tap do |b|
+          b.use ConfigValidate
+          b.use ConnectLibvirt
+          b.use ReadMacAddresses
+        end
+      end
+
       # This is the action that will run a single SSH command.
       def self.action_ssh_run
         Vagrant::Action::Builder.new.tap do |b|
@@ -336,6 +344,7 @@ module VagrantPlugins
       autoload :PruneNFSExports, action_root.join('prune_nfs_exports')
 
       autoload :ReadSSHInfo, action_root.join('read_ssh_info')
+      autoload :ReadMacAddresses, action_root.join('read_mac_addresses')
       autoload :ReadState, action_root.join('read_state')
       autoload :ResumeDomain, action_root.join('resume_domain')
       autoload :SetNameOfDomain, action_root.join('set_name_of_domain')

lib/vagrant-libvirt/action/read_mac_addresses.rb

@@ -0,0 +1,42 @@
+require "log4r"
+
+module VagrantPlugins
+  module ProviderLibvirt
+    module Action
+      class ReadMacAddresses
+        def initialize(app, env)
+          @app    = app
+          @logger = Log4r::Logger.new("vagrant_libvirt::action::read_mac_addresses")
+        end
+
+        def call(env)
+          env[:machine_mac_addresses] = read_mac_addresses(env[:libvirt_compute], env[:machine])
+        end
+
+        def read_mac_addresses(libvirt, machine)
+          return nil if machine.id.nil?
+
+          domain = libvirt.client.lookup_domain_by_uuid(machine.id)
+
+          if domain.nil?
+            @logger.info("Machine could not be found, assuming it got destroyed")
+            machine.id = nil
+            return nil
+          end
+
+          xml = Nokogiri::XML(domain.xml_desc)
+          mac = xml.xpath("/domain/devices/interface/mac/@address")
+
+          if mac.length == 0
+            return {}
+          end
+
+          Hash[mac.each_with_index.map do |x,i|
+            @logger.debug("interface[#{i}] = #{x.value}")
+            [i,x.value]
+          end]
+        end
+      end
+    end
+  end
+end

lib/vagrant-libvirt/cap/nic_mac_addresses.rb

@@ -0,0 +1,11 @@
+module VagrantPlugins
+	module ProviderLibvirt
+		module Cap
+			class NicMacAddresses
+				def self.nic_mac_addresses(machine)
+					machine.provider.mac_addresses
+				end
+			end
+		end
+	end
+end

lib/vagrant-libvirt/plugin.rb

@@ -37,6 +37,11 @@ module VagrantPlugins
         Cap::MountP9
       end
 
+	  provider_capability(:libvirt, :nic_mac_addresses) do
+		require_relative "cap/nic_mac_addresses"
+		Cap::NicMacAddresses
+	  end
+
       # lower priority than nfs or rsync
       # https://github.com/pradels/vagrant-libvirt/pull/170
       synced_folder("9p", 4) do

lib/vagrant-libvirt/provider.rb

@@ -49,6 +49,18 @@ module VagrantPlugins
         env[:machine_ssh_info]
       end
 
+	  def mac_addresses
+	  	# Run a custom action called "read_mac_addresses" which will return
+		# a list of mac addresses used by the machine. The returned data will
+		# be in the following format:
+		#
+		# {
+		# 	<ADAPTER_ID>: <MAC>
+		# }
+		env = @machine.action('read_mac_addresses')
+		env[:machine_mac_addresses]
+	  end
+
       # This should return the state of the machine within this provider.
       # The state must be an instance of {MachineState}.
       def state