module huawei-direct-route-vlink {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-direct-route-vlink";

    prefix directrtvlink;

    import huawei-extension {
      prefix ext;
    }
    import huawei-ifm {
      prefix ifm;
    }
    import huawei-network-instance {
      prefix ni;
    }
    import huawei-routing-policy {
      prefix rtp;
    }
    import huawei-ip {
      prefix ip;
    }
    import huawei-ethernet {
      prefix ethernet;
    }
    import huawei-l3vpn {
      prefix l3vpn;
    }
    import huawei-xpl {
      prefix xpl;
    }

    organization
      "Huawei Technologies Co., Ltd.";

    contact
      "Huawei Industrial Base
     Bantian, Longgang
     Shenzhen 518129
     People's Republic of China
     Website: http://www.huawei.com
     Email: support@huawei.com";

    description
      "This module contains a collection of YANG definitions for managing direct route VLINK.";

    revision "2019-07-15" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "eum";

    typedef vlink-address-family {
      type enumeration {
        enum "ipv4uni" {
          value 0;
          description "IPv4 unicast.";
        }
        enum "ipv6uni" {
          value 1;
          description "IPv6 unicast.";
        }
      }
      description
        "The type of VLINK address family.";
    }

    container direct-route-vlink {
      description "Configure VLINK routes.";
      container vlink-import-routes {
        description
          "List of configuration VLINK import routes.";
        list vlink-import-route {
          must
            "source-vpn-instance!=destination-vpn-instance";
          key "address-family source-vpn-instance destination-vpn-instance";
          max-elements 256;
          description
            "Configure VLINK import route.";
          leaf address-family {
            type vlink-address-family;
            description
              "Address family: IPv4 or IPv6 unicast address family.";
          }

          leaf source-vpn-instance {
            type leafref {
              path "/ni:network-instance/ni:instances/ni:instance/ni:name";
            }
            must
              "((../address-family = 'ipv4uni') and (/ni:network-instance/ni:instances/ni:instance[ni:name=current()]/l3vpn:afs/l3vpn:af[l3vpn:type='ipv4-unicast'])) or ((../address-family = 'ipv6uni') and (/ni:network-instance/ni:instances/ni:instance[ni:name=current()]/l3vpn:afs/l3vpn:af[l3vpn:type='ipv6-unicast']))";
            description
              "Source VPN instance.";
          }

          leaf destination-vpn-instance {
            type leafref {
              path "/ni:network-instance/ni:instances/ni:instance/ni:name";
            }
            must
              "((../address-family = 'ipv4uni') and (/ni:network-instance/ni:instances/ni:instance[ni:name=current()]/l3vpn:afs/l3vpn:af[l3vpn:type='ipv4-unicast'])) or ((../address-family = 'ipv6uni') and (/ni:network-instance/ni:instances/ni:instance[ni:name=current()]/l3vpn:afs/l3vpn:af[l3vpn:type='ipv6-unicast']))";
            description
              "Destination VPN instance.";
          }

          choice route-configuration {
            description
              "Configuring a routing policy or filter.";
            case route-policy {
              description
                "Configuring a routing policy.";
              leaf route-policy-name {
                type leafref {
                  path "/rtp:routing-policy/rtp:policy-definitions/rtp:policy-definition/rtp:name";
                }
                description
                  "Set the name of a VLINK routing policy.";
              }
            }  // case route-policy

            case route-filter {
              description
                "Configuring a routing policy or filter.";
              leaf route-filter-name {
                type leafref {
                  path "/xpl:xpl/xpl:route-filters/xpl:route-filter/xpl:name";
                }
                description
                  "Set the name of a VLINK routing filter.";
              }
            }  // case route-filter
          }  // choice route-configuration
        }  // list vlink-import-route
      }  // container vlink-import-routes
    }  // container direct-route-vlink

    augment /ifm:ifm/ifm:interfaces/ifm:interface {
      description
        "Extend interface attribute.";
      container vlink-routes {
        must
          "../ifm:type = 'Vlanif' or ../ifm:type = 'Vbdif' or ../ethernet:ethernet/ethernet:l3-sub-interface/ethernet:dot1q-termination";
        description
          "List of configuration VLINK routes.";
        list vlink-route {
          key "address-family";
          description
            "Configure VLINK routes.";
          leaf address-family {
            type vlink-address-family;
            must
              "(../address-family = 'ipv4uni' and not(../../../ethernet:ethernet/ethernet:l3-sub-interface/ethernet:dot1q-termination)) or
          (../address-family = 'ipv6uni' and ../../../ip:ipv6)";
            description
              "Address family: IPv4 or IPv6 unicast address family.";
          }
        }  // list vlink-route
      }  // container vlink-routes

      container vlink-configuration {
        description
          "Configure direct route attributes.";
        leaf preference {
          type uint8 {
            range "0..255";
          }
          description
            "Preference value for VLINK routes.";
        }
      }  // container vlink-configuration
    }

    augment /ni:network-instance/ni:instances/ni:instance {
      description "Extend VPN attribute.";
      container vlink-vpns {
        when "../l3vpn:afs/l3vpn:af";
        description
          "List of configuration VLINK routes.";
        list vlink-vpn {
          key "address-family";
          description
            "Configure VLINK routes.";
          leaf address-family {
            type vlink-address-family;
            must
              "((../address-family = 'ipv4uni') and (/ni:network-instance/ni:instances/ni:instance[ni:name=current()/../../../ni:name]/l3vpn:afs/l3vpn:af[l3vpn:type='ipv4-unicast'])) or ((../address-family = 'ipv6uni') and (/ni:network-instance/ni:instances/ni:instance[ni:name=current()/../../../ni:name]/l3vpn:afs/l3vpn:af[l3vpn:type='ipv6-unicast']))";
            description
              "Address family: IPv4 or IPv6 unicast address family.";
          }

          choice route-configuration {
            description
              "Configuring a routing policy or filter.";
            case route-policy {
              description
                "Configuring a routing policy.";
              leaf route-policy-name {
                type leafref {
                  path "/rtp:routing-policy/rtp:policy-definitions/rtp:policy-definition/rtp:name";
                }
                description
                  "Set the name of a VLINK routing policy.";
              }
            }  // case route-policy

            case route-filter {
              description
                "Configuring a routing policy or filter.";
              leaf route-filter-name {
                type leafref {
                  path "/xpl:xpl/xpl:route-filters/xpl:route-filter/xpl:name";
                }
                description
                  "Set the name of a VLINK routing filter.";
              }
            }  // case route-filter
          }  // choice route-configuration
        }  // list vlink-vpn
      }  // container vlink-vpns
    }
  }  // module huawei-direct-route-vlink