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module vpp-nsh {
  yang-version 1;
  namespace "urn:opendaylight:params:xml:ns:yang:vpp:nsh";
  prefix "vpp-nsh";

  revision "2017-03-15" {
    description
    "This revision adds support for NSH-MD2 features";
  }

  revision "2016-12-14" {
    description
    "This revision adds support for NSH-Proxy and NSH-Classifier features";
  }

  revision "2016-06-24" {
    description
    "Initial revision of vpp-nsh model";
  }

  import iana-if-type {
    prefix "ianaift";
  }
  import ietf-interfaces {
    prefix "if";
  }
  import ietf-yang-types {
    prefix "yang";
  }
  import ietf-inet-types {
    prefix "inet";
  }
  import yang-ext {
    prefix "ext";
  }
  import v3po {
    prefix "v3po";
  }
  /*
   * Defines the supported next protocols that can be used for
   * NSH next-protocol field.
   */
  identity next-protocol {
    description "Base identity from which all nsh next protocols
                 are derived from";
  }

  identity ipv4 {
    base next-protocol;
    description
      "Support ipv4 to act as next protocol";
  }

  identity ipv6 {
    base next-protocol;
    description
      "Support ipv6 to act as next protocol";
  }

  identity ethernet {
    base next-protocol;
    description
      "Support ethernet to act as next protocol";
  }

  typedef nsh-next-protocol {
    type identityref {
      base "next-protocol";
    }
    description "Identifies a specific next protocol for nsh";
  }

  /*
   * Defines the supported nsh header action.
   */
  identity action-type {
    description "nsh header action type";
  }

  identity swap {
    base "action-type";
    description "swap action type";
  }

  identity push {
    base "action-type";
    description "push action type";
  }

  identity pop {
    base "action-type";
    description "pop action type";
  }

  typedef nsh-action-type {
    type identityref {
      base "action-type";
    }
  }

  /*
   * Defines the supported encap type.
   */
  identity encap-type {
    description "encap type";
  }

  identity vxlan-gpe {
    base "encap-type";
    description "vxlan-gpe encap type";
  }

  identity vxlan4 {
    base "encap-type";
    description "ipv4 vxlan encap type";
  }

  identity vxlan6 {
    base "encap-type";
    description "ipv6 vxlan encap type";
  }

  identity none {
    base "encap-type";
    description "encap-none";
  }

  typedef nsh-encap-type {
    type identityref {
      base "encap-type";
    }
  }

  /*
   * Defines the supported MD-types.
   */
  identity md-type {
    description "md type";
  }

  identity md-type1 {
    base "md-type";
    description "nsh md-type1";
  }

  identity md-type2 {
    base "md-type";
    description "nsh md-type2";
  }

  typedef nsh-md-type {
    type identityref {
      base "md-type";
    }
  }

  grouping nsh-md-type1-attributes {
    leaf c1 {
      type uint32;
    }
    leaf c2 {
      type uint32;
    }
    leaf c3 {
      type uint32;
    }
    leaf c4 {
      type uint32;
    }
  }

  grouping nsh-md-type2-attributes {
    list md2-data {
      key "md2_class type";

      leaf md2_class {
        type uint32 {
          range "0..65535";
        }
      }
      leaf type
      {
        type uint8;
      }
      leaf len
      {
        type uint8;
      }
      leaf metadata
      {
        type string {
          length 1..128;
        }
      }
    }
  }

  grouping nsh-entry-base-attributes {
    leaf name {
      type string;
      description "NSH Entry Name";
    }
    leaf nsp {
      type uint32 {
        range "0..16777215";
      }
    }
    leaf nsi {
      type uint8 {
        range "1..255";
      }
    }
    leaf md-type {
      type nsh-md-type;
    }
    leaf version {
      type uint8;
    }
    leaf length {
      type uint8;
    }
    leaf next-protocol {
      type nsh-next-protocol;
    }
  }

  grouping nsh-map-base-attributes {
    leaf name {
      type string;
      description "NSH Map Name";
    }
    leaf nsp {
      type uint32 {
        range "0..16777215";
      }
    }
    leaf nsi {
      type uint8 {
        range "1..255";
      }
    }
    leaf mapped-nsp {
      type uint32 {
        range "0..16777215";
      }
    }
    leaf mapped-nsi {
      type uint8 {
        range "1..255";
      }
    }
    leaf nsh-action {
      type nsh-action-type;
      default "swap";
    }
    leaf encap-type {
      type nsh-encap-type;
    }
    leaf encap-if-name {
      type string;
      description "Interface Name";
    }
  }

  container vpp-nsh {
    description
    "NSH config data";

    container nsh-entries {
      list nsh-entry {
        key "name";

        uses nsh-entry-base-attributes;

        description
          "nsh-entry configuration";
      }
    }

    container nsh-maps {
      list nsh-map {
        key "name";

        uses nsh-map-base-attributes;

        description
          "nsh-map configuration";
      }
    }
  }

  augment /vpp-nsh/nsh-entries/nsh-entry {
    ext:augment-identifier nsh-md-type-1-augment;
    when "/md-type = 'vpp-nsh:md-type1' ";
    uses nsh-md-type1-attributes;
  }

  augment /vpp-nsh/nsh-entries/nsh-entry {
    ext:augment-identifier nsh-md-type-2-augment;
    when "/md-type = 'vpp-nsh:md-type2' ";
    uses nsh-md-type2-attributes;
  }

  container vpp-nsh-state {
    config false;

    description
      "NSH operational data";

    container nsh-entries {
      list nsh-entry {
        key "name";

        uses nsh-entry-base-attributes;

        description
          "nsh-entry operational data";
      }
    }

    container nsh-maps {
      list nsh-map {
        key "name";

        uses nsh-map-base-attributes;

        description
          "nsh-map operational data";
      }
    }
  }

  augment /vpp-nsh-state/nsh-entries/nsh-entry {
    ext:augment-identifier nsh-md-type-1-state-augment;
    when "/md-type = 'vpp-nsh:md-type1' ";
    uses nsh-md-type1-attributes;
  }

  augment /vpp-nsh-state/nsh-entries/nsh-entry {
    ext:augment-identifier nsh-md-type-2-state-augment;
    when "/md-type = 'vpp-nsh:md-type2' ";
    uses nsh-md-type2-attributes;
  }
}