providers/virtualbox: 4.2 max network adapters to 36 [GH-1886]

CHANGELOG.md

@@ -58,6 +58,8 @@ BUG FIXES:
   - guests/debian: Force bring up eth0. Fixes hangs on setting hostname.
    [GH-2026]
   - hosts/fedora: properly detect later CentOS versions. [GH-2008]
+  - providers/virtualbox: VirtualBox 4.2 now supports up to 36
+    network adapters. [GH-1886]
   - provisioners/ansible: Execute ansible with a cwd equal to the
     path where the Vagrantfile is. [GH-2051]
   - provisioners/ansible: No longer report failure on every run. [GH-2007]

plugins/providers/virtualbox/action/clear_network_interfaces.rb

@@ -12,7 +12,7 @@ module VagrantPlugins
           # excluding the NAT adapter on port 1 which Vagrant always
           # expects to exist.
           adapters = []
-          2.upto(8).each do |i|
+          2.upto(env[:machine].provider.driver.max_network_adapters).each do |i|
             adapters << {
               :adapter => i,
               :type    => :none

plugins/providers/virtualbox/driver/base.rb

@@ -153,6 +153,11 @@ module VagrantPlugins
         def import(ovf)
         end
 
+        # Returns the maximum number of network adapters.
+        def max_network_adapters
+          8
+        end
+
         # Returns a list of forwarded ports for a VM.
         #
         # @param [String] uuid UUID of the VM to read from, or `nil` if this

plugins/providers/virtualbox/driver/version_4_2.rb

@@ -202,6 +202,10 @@ module VagrantPlugins
           nil
         end
 
+        def max_network_adapters
+          36
+        end
+
         def read_forwarded_ports(uuid=nil, active_only=false)
           uuid ||= @uuid