Bug: fix vpn network problem caused by vagrant fact

Boolean facts must be escaped with str2bool. This commit includes
new tests to catch VPN problems like this in the future.

puppet/modules/site_config/manifests/params.pp

@@ -6,8 +6,7 @@ class site_config::params {
   $ec2_local_ipv4_interface = getvar("interface_${::ec2_local_ipv4}")
   $environment              = hiera('environment', undef)
 
-
-  if $::vagrant {
+  if str2bool("$::vagrant") {
     # Depending on the backend hypervisor networking is setup differently.
     if $::interfaces =~ /eth1/ {
       # Virtualbox: Private networking creates a second interface eth1

puppet/modules/site_config/manifests/setup.pp

@@ -37,7 +37,7 @@ class site_config::setup {
   # we need to include shorewall::interface{eth0} in setup.pp so
   # packages can be installed during main puppetrun, even before shorewall
   # is configured completly
-  if $::vagrant {
+  if str2bool("$::vagrant") {
     include site_config::vagrant
   }
 

puppet/modules/site_openvpn/manifests/init.pp

@@ -68,7 +68,7 @@ class site_openvpn {
   # find out the netmask in cidr format of the primary IF
   # thx to https://blog.kumina.nl/tag/puppet-tips-and-tricks/
   # we can do this using an inline_template:
-  $factname_primary_netmask = "netmask_cidr_${::site_config::params::interface}"
+  $factname_primary_netmask = "netmask_${::site_config::params::interface}"
   $primary_netmask = inline_template('<%= scope.lookupvar(@factname_primary_netmask) %>')
 
   # deploy dh keys

puppet/modules/site_openvpn/templates/add_gateway_ips.sh.erb

 #!/bin/sh
 
-ip addr show dev <%= scope.lookupvar('site_config::params::interface') %> | grep -q <%= @openvpn_gateway_address %>/<%= @primary_netmask %> ||
+ip addr show dev <%= scope.lookupvar('site_config::params::interface') %> | grep -q "inet <%= @openvpn_gateway_address %>/" ||
   ip addr add <%= @openvpn_gateway_address %>/<%= @primary_netmask %> dev <%= scope.lookupvar('site_config::params::interface') %>
 
+EXITCODE=$?
+if [ $EXITCODE != 0 ]; then
+  exit $EXITCODE
+fi
+
 <% if @openvpn_second_gateway_address %>
-ip addr show dev <%= scope.lookupvar('site_config::params::interface') %> | grep -q <%= @openvpn_second_gateway_address %>/<%= @primary_netmask %> ||
+ip addr show dev <%= scope.lookupvar('site_config::params::interface') %> | grep -q "<%= @openvpn_second_gateway_address %>/" ||
   ip addr add <%= @openvpn_second_gateway_address %>/<%= @primary_netmask %> dev <%= scope.lookupvar('site_config::params::interface') %>
+
+EXITCODE=$?
+if [ $EXITCODE != 0 ]; then
+  exit $EXITCODE
+fi
 <% end %>
 
 /bin/echo 1 > /proc/sys/net/ipv4/ip_forward

tests/server-tests/white-box/openvpn.rb

@@ -13,4 +13,40 @@ class OpenVPN < LeapTest
     pass
   end
 
+  def test_02_Can_connect_to_openvpn?
+    # because of the way the firewall rules are currently set up, you can only
+    # connect to the standard 1194 openvpn port when you are connecting
+    # from the same host as openvpn is running on.
+    #
+    # so, this is disabled for now:
+    # $node['openvpn']['ports'].each {|port| ...}
+    #
+
+    $node['openvpn']['protocols'].each do |protocol|
+      assert_openvpn_is_bound_to_port($node['openvpn']['gateway_address'], protocol, 1194)
+    end
+    pass
+  end
+
+  private
+
+  #
+  # asserting succeeds if openvpn appears to be correctly bound and we can
+  # connect to it. we don't actually try to establish a vpn connection in this
+  # test, we just check to see that it sort of looks like it is openvpn running
+  # on the port.
+  #
+  def assert_openvpn_is_bound_to_port(ip_address, protocol, port)
+    protocol = protocol.downcase
+    if protocol == 'udp'
+      # this sends a magic string to openvpn to attempt to start the protocol.
+      nc_output = `/bin/echo -e "\\x38\\x01\\x00\\x00\\x00\\x00\\x00\\x00\\x00" | timeout 0.5 nc -u #{ip_address} #{port}`.strip
+      assert !nc_output.empty?, "Could not connect to OpenVPN daemon at #{ip_address} on port #{port} (#{protocol})."
+    elsif protocol == 'tcp'
+      assert system("openssl s_client -connect #{ip_address}:#{port} 2>&1 | grep -q CONNECTED"),
+        "Could not connect to OpenVPN daemon at #{ip_address} on port #{port} (#{protocol})."
+    else
+      assert false, "invalid openvpn protocol #{protocol}"
+    end
+  end
 end