module huawei-cgn {

    yang-version 1;

    namespace "urn:huawei:yang:huawei-cgn";

    prefix cgn;

    import huawei-extension {
      prefix ext;
    }
    import ietf-yang-types {
      prefix yang;
    }
    import huawei-license {
      prefix lcs;
    }
    import huawei-pub-type {
      prefix pub-type;
    }

    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 Configurations of cgn.";

    revision "2021-08-05" {
      description
        "Add new countiners instance-address-usages and rpc get-port-usage-distributes and augment license.";
      reference
        "Huawei private.";

    }

    revision "2021-04-23" {
      description
        "Add new countiners nat-service-infos and nat-instance-infos.";
      reference
        "Huawei private.";

    }

    revision "2021-02-24" {
      description "Initial revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "nat";

    typedef engine-id {
      type enumeration {
        enum "NA" {
          value 0;
          description
            "The enumeration is NA when the service is based on slot or card.";
        }
        enum "engine0" {
          value 1;
          description "Engine ID 0.";
        }
        enum "engine1" {
          value 2;
          description "Engine ID 1.";
        }
        enum "engine2" {
          value 3;
          description "Engine ID 2.";
        }
        enum "engine3" {
          value 4;
          description "Engine ID 3.";
        }
      }
      description "CGN engine ID.";
    }

    typedef card-id {
      type enumeration {
        enum "NA" {
          value 0;
          description
            "The enumeration is NA when the service is based on slot or engine.";
        }
        enum "card0" {
          value 1;
          description "Card ID 0.";
        }
        enum "card1" {
          value 2;
          description "Card ID 1.";
        }
      }
      description "CGN card ID.";
    }

    typedef instance-type {
      type enumeration {
        enum "nat" {
          value 0;
          description "Nat type.";
        }
        enum "ds-lite" {
          value 1;
          description "DS-Lite type.";
        }
        enum "nat64" {
          value 2;
          description "Nat64 type.";
        }
      }
      description "Instance type.";
    }

    typedef license-type {
      type enumeration {
        enum "bandwidth-board-increment" {
          value 0;
          description
            "Incremental board bandwidth.";
        }
        enum "bandwidth-board" {
          value 1;
          description
            "Boad bandwidth which need to specified.";
        }
        enum "bandwidth-card" {
          value 2;
          description
            "Subcard bandwidth license type.";
        }
      }
      description
        "CGN bandwidth license type.";
    }

    typedef valid-flag {
      type enumeration {
        enum "valid" {
          value 0;
          description
            "Whether the license configuration is valid on the board.";
        }
        enum "invalid" {
          value 1;
          description
            "License configuration is invalid on the board.";
        }
        enum "invalid-board-type-error" {
          value 2;
          description
            "Invalid (board type error).";
        }
        enum "invalid-board-unregistered" {
          value 3;
          description
            "Invalid (board unregistered).";
        }
      }
      description "Valid flag type.";
    }

    container cgn {
      description "Carrier Grade NAT.";
      container nat-session-statisticss {
        config false;
        description
          "List of nat sessions statistics.";
        list nat-session-statistics {
          key "slot engine card";
          description
            "Statistics of nat sessions.";
          leaf slot {
            type string {
              length "1..16";
            }
            description "Slot ID.";
          }

          leaf engine {
            type engine-id;
            description
              "The value is NA when the service is based on slot or card.";
          }

          leaf card {
            type card-id;
            description
              "The value is NA when the service is based on slot or engine.";
          }

          leaf session-count {
            type uint32;
            description
              "Current nat sessions count.";
          }
        }  // list nat-session-statistics
      }  // container nat-session-statisticss

      container nat-service-infos {
        config false;
        description
          "List of nat service information.";
        list nat-service-info {
          key "slot engine card";
          description
            "Statistics of nat service.";
          leaf slot {
            type string {
              length "1..16";
            }
            description "Slot ID.";
          }

          leaf engine {
            type engine-id;
            description
              "The value is NA when the service is based on slot or card.";
          }

          leaf card {
            type card-id;
            description
              "The value is NA when the service is based on slot or engine.";
          }

          container payload-statistics {
            description
              "List of nat payload statistics.";
            list payload-statistic {
              key "start-time end-time";
              description
                "Statistics of nat payload.";
              leaf start-time {
                type yang:date-and-time;
                description
                  "Start time when statistics were collected.";
              }

              leaf end-time {
                type yang:date-and-time;
                description
                  "End time when statistics were collected.";
              }

              leaf sampling-interval {
                ext:support-filter "true";
                type uint8 {
                  range "1..24";
                }
                units "h";
                description
                  "Interval for sampling.";
              }

              leaf send-average-packet-speed {
                type uint64;
                units "pps";
                description
                  "Average number of sent packet speed.";
              }

              leaf send-maximum-packet-speed {
                type uint64;
                units "pps";
                description
                  "Maximum number of sent packet speed.";
              }

              leaf send-average-bit-speed {
                type uint64;
                units "bit/s";
                description
                  "Average number of sent bit speed.";
              }

              leaf send-maximum-bit-speed {
                type uint64;
                units "bit/s";
                description
                  "Maximum number of sent bit speed.";
              }

              leaf received-average-packet-speed {
                type uint64;
                units "pps";
                description
                  "Average value of received packet speed.";
              }

              leaf received-maximum-packet-speed {
                type uint64;
                units "pps";
                description
                  "Maximum number of received packet speed.";
              }

              leaf received-average-bit-speed {
                type uint64;
                units "bit/s";
                description
                  "Average number of received bit speed.";
              }

              leaf received-maximum-bit-speed {
                type uint64;
                units "bit/s";
                description
                  "Maximum number of received bit speed.";
              }
            }  // list payload-statistic
          }  // container payload-statistics
        }  // list nat-service-info
      }  // container nat-service-infos

      container nat-instance-infos {
        config false;
        description
          "List of nat instance information.";
        list nat-instance-info {
          key "slot engine card instance-type instance-name";
          description
            "Statistics of nat instance.";
          leaf slot {
            type string {
              length "1..16";
            }
            description "Slot ID.";
          }

          leaf engine {
            type engine-id;
            description
              "The value is NA when the service is based on slot or card.";
          }

          leaf card {
            type card-id;
            description
              "The value is NA when the service is based on slot or engine.";
          }

          leaf instance-type {
            type instance-type;
            description "Instance type.";
          }

          leaf instance-name {
            type string {
              length "1..31";
            }
            description "Instance name.";
          }

          container session-usages {
            description
              "List of nat session usage.";
            list session-usage {
              key "start-time end-time";
              description
                "Statistics of nat session.";
              leaf start-time {
                type yang:date-and-time;
                description
                  "Start time when statistics were collected.";
              }

              leaf end-time {
                type yang:date-and-time;
                description
                  "End time when statistics were collected.";
              }

              leaf sampling-interval {
                ext:support-filter "true";
                type uint8 {
                  range "1..24";
                }
                units "h";
                description
                  "Interval for sampling.";
              }

              leaf current-session-usage {
                type uint64;
                description
                  "Current session usage.";
              }

              leaf average-session-usage {
                type uint64;
                description
                  "Average session usage.";
              }

              leaf maximum-session-usage {
                type uint64;
                description
                  "Maximum session usage.";
              }
            }  // list session-usage
          }  // container session-usages
        }  // list nat-instance-info
      }  // container nat-instance-infos

      container instance-address-usages {
        config false;
        description
          "List of nat address group usage.";
        list instance-address-usage {
          key "instance-type instance-name pool-name slot engine card";
          description
            "Statistics of address usage info on a cpu.";
          leaf instance-type {
            type instance-type;
            description "Instance type.";
          }

          leaf instance-name {
            type string {
              length "1..31";
            }
            description "NAT instance name.";
          }

          leaf pool-name {
            type string {
              length "1..31";
            }
            description
              "NAT address pool name.";
          }

          leaf slot {
            type string {
              length "1..15";
            }
            description
              "Specifies the Slot ID of a service board.";
          }

          leaf engine {
            type engine-id;
            description
              "The value is NA when the service is based on slot or card. This parameter can only be configured on a centralized-boards.";
          }

          leaf card {
            type card-id;
            description
              "The value is NA when the service is based on slot or engine. This parameter takes effect only on a VSUF-80 or VSUF-160 or VSUI-160-E.";
          }

          leaf pool-id {
            type uint8 {
              range "0..127";
            }
            description
              "IP address pool ID.";
          }

          leaf pool-address-usage {
            type pub-type:percent;
            description
              "Address usage of an IP address pool. If a section is locked, an attempt to apply for public IP addresses may fail even if address usage is not 100%.";
          }

          leaf pool-port-usage {
            type pub-type:percent;
            description
              "Users' actual port usage. The value is the number of user actually used ports/Total number of ports (Reserved ports are not counted for the actually used ports and total ports).";
          }

          leaf pcp-allcated-port-usage {
            type pub-type:percent;
            description
              "Usage of the reserved PCP ports allocated by the RADIUS service. The value is the number of PCP ports allocated by the RADIUS service/Total number of reserved ports.";
          }

          leaf pcp-reserved-port-usage {
            type pub-type:percent;
            description
              "Users' actual usage of reserved PCP ports. The value is the number of user actually used PCP ports/Total number of reserved ports (Well-known ports are not counted for the actually used PCP ports and reserved ports).";
          }
        }  // list instance-address-usage
      }  // container instance-address-usages
    }  // container cgn

    rpc get-port-usage-distributes {
      description
        "Query port usage distributes in a nat-instance.";
      input {
        leaf instance-name {
          type string {
            length "1..31";
          }
          description "NAT instance name.";
        }

        leaf start-port {
          type uint16;
          default '0';
          description
            "Displays the number of users assigned a port range with a specified start port number.";
        }

        leaf step {
          type uint16 {
            range "64..2048";
          }
          description
            "Displays the number of users assigned a port range with a specified port number step.";
        }

        leaf interval-count {
          type uint8 {
            range "1..10";
          }
          default '10';
          description
            "Specifies the number of port ranges.";
        }
      }

      output {
        container port-range-infos {
          description
            "List of port range info.";
          list port-range-info {
            key "instance-name start-port";
            description
              "Statistics of the users for which ports in specified ranges have been allocated.";
            leaf instance-name {
              type string {
                length "1..31";
              }
              description
                "NAT instance name.";
            }

            leaf start-port {
              type uint16;
              description
                "Start port in a port range.";
            }

            leaf end-port {
              type uint16;
              description
                "End port in a port range.";
            }

            leaf user-number {
              type uint16;
              description
                "Number of users in a port range.";
            }
          }  // list port-range-info
        }  // container port-range-infos
      }
    }  // rpc get-port-usage-distributes
  }  // module huawei-cgn