<?xml version="1.0"?>
<interfaceDefinition>
  <node name="vpn">
    <children>
      <node name="pptp" owner="${vyos_conf_scripts_dir}/accel_pptp.py">
        <properties>
          <help>Point to Point Tunneling Protocol (PPTP) Virtual Private Network (VPN)</help>
        </properties>
        <children>
          <node name="remote-access">
            <properties>
              <help>Remote access PPTP VPN</help>
            </properties>
            <children>
              <leafNode name="mtu">
                <properties>
                  <help>Maximum Transmission Unit (MTU)</help>
                  <constraint>
                    <validator name="numeric" argument="--range 128-16384"/>
                  </constraint>
                </properties>
              </leafNode>
              <leafNode name="outside-address">
                <properties>
                  <help>External IP address to which VPN clients will connect</help>
                  <constraint>
                    <validator name="ipv4-address"/>
                  </constraint>
                </properties>
              </leafNode>
              <node name="dns-servers">
                <properties>
                  <help>IPv4 Domain Name Service (DNS) server</help>
                </properties>
                <children>
                  <leafNode name="server-1">
                    <properties>
                      <help>Primary DNS server</help>
                      <valueHelp>
                        <format>ipv4</format>
                        <description>IPv4 address</description>
                      </valueHelp>
                      <constraint>
                        <validator name="ipv4-address"/>
                      </constraint>
                    </properties>
                  </leafNode>
                  <leafNode name="server-2">
                    <properties>
                      <help>Secondary DNS server</help>
                      <valueHelp>
                        <format>ipv4</format>
                        <description>IPv4 address</description>
                      </valueHelp>
                      <constraint>
                        <validator name="ipv4-address"/>
                      </constraint>
                    </properties>
                  </leafNode>
                </children>
              </node> 
              <node name="wins-servers">
                <properties>
                  <help>Windows Internet Name Service (WINS) server settings</help>
                </properties>
                <children>
                  <leafNode name="server-1">
                    <properties>
                      <help>Primary WINS server</help>
                      <constraint>
                        <validator name="ipv4-address"/>
                      </constraint>
                    </properties>
                  </leafNode>
                  <leafNode name="server-2">
                    <properties>
                      <help>Secondary WINS server</help>
                    <constraint>
                      <validator name="ipv4-address"/>
                    </constraint>
                    </properties>
                  </leafNode>
                </children>
              </node>
              <node name="client-ip-pool">
                <properties>
                  <help>Pool of client IP addresses (must be within a /24)</help>
                </properties>
                <children>
                  <leafNode name="start">
                    <properties>
                      <help>First IP address in the pool (will be used as gateway address)</help>
                      <constraint>
                        <validator name="ipv4-address"/>
                      </constraint>
                    </properties>
                  </leafNode>
                  <leafNode name="stop">
                    <properties>
                      <help>Last IP address in the pool</help>
                      <constraint>
                        <validator name="ipv4-address"/>
                      </constraint>
                    </properties>
                  </leafNode>
                </children>
              </node>
              <leafNode name="gateway-address">
                <properties>
                  <help>Gatway address uses as client tunnel termination point</help>
                  <constraint>
                    <validator name="ipv4-address"/>
                  </constraint>
                </properties>
              </leafNode>
              <node name="authentication">
                <properties>
                  <help>Authentication for remote access PPTP VPN</help>
                </properties>
                <children>
                  <leafNode name="require">
                    <properties>
                      <help>Authentication protocol for remote access peer PPTP VPN</help>
                      <valueHelp>
                        <format>pap</format>
                        <description>Require the peer to authenticate itself using PAP [Password Authentication Protocol].</description>
                      </valueHelp>
                      <valueHelp>
                        <format>chap</format>
                        <description>Require the peer to authenticate itself using CHAP [Challenge Handshake Authentication Protocol].</description>
                      </valueHelp>
                      <valueHelp>
                        <format>mschap</format>
                        <description>Require the peer to authenticate itself using CHAP [Challenge Handshake Authentication Protocol].</description>
                      </valueHelp>
                      <valueHelp>
                        <format>mschap-v2</format>
                        <description>Require the peer to authenticate itself using MS-CHAPv2 [Microsoft Challenge Handshake Authentication Protocol, Version 2].</description>
                      </valueHelp>
                    </properties>
                  </leafNode>
                  <leafNode name="mode">
                    <properties>
                      <help>Authentication mode for remote access PPTP VPN</help>
                      <valueHelp>
                        <format>local</format>
                        <description>Use local username/password configuration</description>
                      </valueHelp>
                      <valueHelp>
                        <format>radius</format>
                        <description>Use a RADIUS server to autenticate users</description>
                      </valueHelp>
                      <constraint>
                        <regex>^(local|radius)</regex>
                      </constraint>
                      <completionHelp>
                        <list>local radius</list>
                      </completionHelp>
                    </properties>
                  </leafNode>
                  <node name="local-users">
                    <properties>
                      <help>Local user authentication for remote access PPTP VPN</help>
                    </properties>
                    <children>
                      <tagNode name="username">
                        <properties>
                          <help>User name for authentication</help>
                        </properties>
                        <children>
                          <leafNode name="disable">
                            <properties>
                              <help>Option to disable a PPTP Server user</help>
                            </properties>
                          </leafNode>
                          <leafNode name="password">
                            <properties>
                              <help>Password for authentication</help>
                            </properties>
                          </leafNode>
                          <leafNode name="static-ip">
                            <properties>
                              <help>Static client IP address</help>
                            </properties>
                          </leafNode>
                        </children>
                      </tagNode>
                    </children>
                  </node>
                  <node name="radius">
                    <properties>
                      <help>RADIUS specific configuration</help>
                    </properties>
                    <children>
                      <tagNode name="server">
                        <properties>
                          <help>IP address of radius server</help>
                          <valueHelp>
                            <format>ipv4</format>
                            <description>IP address of RADIUS server</description>
                          </valueHelp>
                        </properties>
                        <children>
                          <leafNode name="key">
                            <properties>
                              <help>Key for accessing the specified server</help>
                            </properties>
                          </leafNode>
                          <leafNode name="req-limit">
                            <properties>
                              <help>Maximum number of simultaneous requests to server (default: unlimited)</help>
                            </properties>
                          </leafNode>
                          <leafNode name="fail-time">
                            <properties>
                              <help>If server doesn't responds mark it as unavailable for this amount of time in seconds</help>
                            </properties>
                          </leafNode>
                        </children>
                      </tagNode>
                    </children>
                  </node>
                </children>
              </node>
            </children>
          </node>
        </children>
      </node>
    </children>
  </node>
</interfaceDefinition>