Enabling bridged networks on Debian

lib/vagrant/action/vm/bridged_network.rb

@@ -42,8 +42,10 @@ module Vagrant
             @env[:ui].info I18n.t("vagrant.actions.vm.bridged_networking.enabling")
 
             # Prepare for new networks
+            @env[:vm].guest.prepare_bridged_networks(networks)
 
             # Enable the networks
+            @env[:vm].guest.enable_bridged_networks(networks)
           end
         end
 

lib/vagrant/guest/base.rb

@@ -79,8 +79,22 @@ module Vagrant
       # @param [Hash] net_options The options for the network.
       def enable_host_only_network(net_options); end
 
+      # Prepares the guest for bridged networks.
+      #
+      # @param [Array] networks Array of networks to prepare for.
+      def prepare_bridged_networks(networks)
+        raise BaseError, :_key => :unsupported_host_only
+      end
+
+      # Enable bridged networks on a guest.
+      #
+      # @param [Array] networks Array of networks to prepare for.
+      def enable_bridged_networks(networks)
+        raise BaseError, :_key => :unsupported_bridged
+      end
+
       def change_host_name(name)
-        raise BaseError, :_key => :unsupported_host_name
+        raise BaseError, :_key => :unsupported_bridged
       end
     end
   end

lib/vagrant/guest/debian.rb

@@ -2,17 +2,16 @@ module Vagrant
   module Guest
     class Debian < Linux
       def prepare_host_only_network(net_options=nil)
-        # Remove any previous host only network additions to the
+        # Remove any previous host only network additions to the interface file.
-        # interface file.
         vm.ssh.execute do |ssh|
-          # Clear out any previous entries
+          ssh.exec!("sudo sed -e '/^#VAGRANT-BEGIN-HOSTONLY/,/^#VAGRANT-END-HOSTONLY/ d' /etc/network/interfaces > /tmp/vagrant-network-interfaces")
-          ssh.exec!("sudo sed -e '/^#VAGRANT-BEGIN/,/^#VAGRANT-END/ d' /etc/network/interfaces > /tmp/vagrant-network-interfaces")
           ssh.exec!("sudo su -c 'cat /tmp/vagrant-network-interfaces > /etc/network/interfaces'")
         end
       end
 
       def enable_host_only_network(net_options)
-        entry = TemplateRenderer.render('network_entry_debian', :net_options => net_options)
+        entry = TemplateRenderer.render('guests/debian/network_hostonly',
+                                        :net_options => net_options)
         vm.ssh.upload!(StringIO.new(entry), "/tmp/vagrant-network-entry")
 
         vm.ssh.execute do |ssh|
@@ -22,6 +21,33 @@ module Vagrant
         end
       end
 
+      def prepare_bridged_networks(networks)
+        # Remove any previous bridged network additions to the interface file.
+        vm.ssh.execute do |ssh|
+          ssh.exec!("sudo sed -e '/^#VAGRANT-BEGIN-BRIDGED/,/^#VAGRANT-END-BRIDGED/ d' /etc/network/interfaces > /tmp/vagrant-network-interfaces")
+          ssh.exec!("sudo su -c 'cat /tmp/vagrant-network-interfaces > /etc/network/interfaces'")
+        end
+      end
+
+      def enable_bridged_networks(networks)
+        entry = TemplateRenderer.render('guests/debian/network_bridged',
+                                        :networks => networks)
+
+        vm.ssh.upload!(StringIO.new(entry), "/tmp/vagrant-network-entry")
+
+        vm.ssh.execute do |ssh|
+          networks.each do |network|
+            ssh.exec!("sudo /sbin/ifdown eth#{network[:adapter]} 2> /dev/null")
+          end
+
+          ssh.exec!("sudo su -c 'cat /tmp/vagrant-network-entry >> /etc/network/interfaces'")
+
+          networks.each do |network|
+            ssh.exec!("sudo /sbin/ifup eth#{network[:adapter]}")
+          end
+        end
+      end
+
       def change_host_name(name)
         vm.ssh.execute do |ssh|
           if !ssh.test?("sudo hostname | grep '#{name}'")

templates/guests/debian/network_bridged.erb

@@ -0,0 +1,7 @@
+<% networks.each do |network| -%>
+#VAGRANT-BEGIN-BRIDGED
+# The contents below are automatically generated by Vagrant. Do not modify.
+auto eth<%= network[:adapter] %>
+iface eth<%= network[:adapter] %> inet dhcp
+#VAGRANT-END-BRIDGED
+<% end -%>

templates/guests/debian/network_hostonly.erb

@@ -1,8 +1,8 @@
-#VAGRANT-BEGIN
+#VAGRANT-BEGIN-HOSTONLY
 # The contents below are automatically generated by Vagrant.
 # Please do not modify any of these contents.
 auto eth<%= net_options[:adapter] %>
 iface eth<%= net_options[:adapter] %> inet static
       address <%= net_options[:ip] %>
       netmask <%= net_options[:netmask] %>
-#VAGRANT-END
+#VAGRANT-END-HOSTONLY

templates/locales/en.yml

@@ -564,6 +564,14 @@ en:
 
     guest:
       base:
+        unsupported_bridged: |-
+          Bridged networking is very distro-specific. Vagrant has support for many
+          distros built-in: Debian, Ubuntu, Gentoo, and RedHat. The distro of your VM
+          couldn't be detected, or isn't supported for host only networking.
+
+          Most of the time this is simply due to the fact that no one has contributed
+          back the SSH commands necessary to set this up. Please report a bug and this
+          will be fixed for your distro.
         unsupported_host_only: |-
           Host only networking is very distro-specific. Vagrant has support for many
           distros built-in: Debian, Ubuntu, Gentoo, and RedHat. The distro of your VM