
/*
 * 
 *   Copyright 2017 RIFT.IO Inc
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 *
 */

module nsd-base
{
  namespace "urn:etsi:osm:yang:nsd-base";
  prefix "nsd-base";

  import ietf-inet-types {
    prefix "inet";
  }

  import mano-types {
    prefix "manotypes";
  }

  import vnfd {
    prefix "vnfd";
  }

  revision 2017-02-28 {
    description
      "Initial revision. This YANG file defines
       the Network Service Descriptor (NSD)
       common groupings";
    reference
      "Derived from earlier versions of base YANG files";
  }

  typedef scaling-trigger {
    type enumeration {
      enum pre-scale-in {
        value 1;
      }
      enum post-scale-in {
        value 2;
      }
      enum pre-scale-out {
        value 3;
      }
      enum post-scale-out {
        value 4;
      }
    }
  }

  typedef scaling-criteria-operation {
    type enumeration {
      enum AND {
        value 1;
      }
      enum OR {
        value 2;
      }
    }
  }

  grouping primitive-parameter {
    leaf name {
      description
          "Name of the parameter.";
      type string;
    }

    leaf data-type {
      description
          "Data type associated with the name.";
      type manotypes:parameter-data-type;
    }

    leaf mandatory {
      description "Is this field mandatory";
      type boolean;
      default false;
    }

    leaf default-value {
      description "The default value for this field";
      type string;
    }

    leaf parameter-pool {
      description "NSD parameter pool name to use for this parameter";
      type string;
    }
  } // primitive-parameter

  grouping nsd-descriptor-common {
    leaf id {
      description "Identifier for the NSD.";
      type string {
        length 1..63;
      }
    }

    leaf name {
      description "NSD name.";
      mandatory true;
      type string;
    }

    leaf short-name {
      description "Short name to appear as label in the UI";
      type string;
    }

    leaf vendor {
      description "Vendor of the NSD.";
      type string;
    }

    leaf logo {
      description
        "File path for  the vendor specific logo. For example icons/mylogo.png.
         The logo  should be part of the network service";
      type string;
    }

    leaf description {
      description "Description of the NSD.";
      type string;
    }

    leaf version {
      description "Version of the NSD";
      type string;
    }

    list connection-point {
      description
          "List for external connection points.
          Each NS has one or more external connection
          points. As the name implies that external
          connection points are used for connecting
          the NS to other NS or to external networks.
          Each NS exposes these connection points to
          the orchestrator. The orchestrator can
          construct network service chains by
          connecting the connection points between
          different NS.";

      key "name";
      uses nsd-connection-point-common;

      leaf type {
        description
            "Type of the connection point.";
        type manotypes:connection-point-type;
      }

      choice connection {
        description "Logical connection of the CP to a VLD or to a VNF CP";

        case vld-ref {

          leaf vld-id-ref {
            description
              "ID reference to a VLD in the NS";
            type leafref {
              path "../../vld/id";
            }
          }

        }

        case vnfd-connection-point-ref {

          leaf member-vnf-index-ref {
            description "Reference to member-vnf within constituent-vnfd";
            type leafref {
              path "../../constituent-vnfd/member-vnf-index";
            }
          }

          leaf vnfd-id-ref {
            description
              "A reference to a vnfd. This is a leafref to path:
                  ../../nsd:constituent-vnfd
                  + [nsd:id = current()/../nsd:id-ref]
                  + /nsd:vnfd-id-ref";
            type leafref {
              path "../../constituent-vnfd" +
                   "[member-vnf-index = current()/../member-vnf-index-ref]" +
                   "/vnfd-id-ref";
            }
          }

          leaf vnfd-connection-point-ref {
            description
              "A reference to a connection point name
                  in a vnfd. This is a leafref to path:
                      /vnfd:vnfd-catalog/vnfd:vnfd
                      + [vnfd:id = current()/../nsd:vnfd-id-ref]
                      + /vnfd:connection-point/vnfd:name";
            type leafref {
              path "/vnfd:vnfd-catalog/vnfd:vnfd" +
                   "[vnfd:id = current()/../vnfd-id-ref]" +
                   "/vnfd:connection-point/vnfd:name";
            }
          }

        }

      }

    }

    list scaling-group-descriptor {
      description
          "scaling group descriptor within this network service.
           The scaling group defines a group of VNFs,
           and the ratio of VNFs in the network service
           that is used as target for scaling action";

      key "name";

      leaf name {
        description "Name of this scaling group.";
        type string;
      }

      list scaling-policy {

        key "name";

        leaf name {
          description
              "Name of the scaling policy";
          type string;
        }

        leaf scaling-type {
          description
              "Type of scaling";
          type manotypes:scaling-policy-type;
        }

        leaf enabled {
          description
            "Specifies if the scaling policy can be applied";
          type boolean;
          default true;
        }

        leaf scale-in-operation-type {
          description
              "Operation to be applied to check between scaling criterias to
               check if the scale in threshold condition has been met.
               Defaults to AND";
          type manotypes:scaling-criteria-operation;
          default AND;
        }

        leaf scale-out-operation-type {
          description
              "Operation to be applied to check between scaling criterias to
               check if the scale out threshold condition has been met.
               Defauls to OR";
          type manotypes:scaling-criteria-operation;
          default OR;
        }

        leaf threshold-time {
          description
            "The duration for which the criteria must hold true";
          type uint32;
          mandatory true;
        }

        leaf cooldown-time {
          description
            "The duration after a scaling-in/scaling-out action has been
            triggered, for which there will be no further optional";
          type uint32;
          mandatory true;
        }

        list scaling-criteria {
          description
              "list of conditions to be met for generating scaling
                 requests";
          key "name";

          leaf name {
            type string;
          }

          leaf scale-in-threshold {
            description
                "Value below which scale-in requests are generated";
            type uint64;
          }

          leaf scale-in-relational-operation {
            description
              "The relational operator used to compare the monitoring param
              against the scale-in-threshold.";
            type manotypes:relational-operation-type;
            default LE;
          }

          leaf scale-out-threshold {
            description
                "Value above which scale-out requests are generated";
            type uint64;
          }

          leaf scale-out-relational-operation {
            description
              "The relational operator used to compare the monitoring param
              against the scale-out-threshold.";
            type manotypes:relational-operation-type;
            default GE;
          }

          leaf ns-monitoring-param-ref {
            description
               "Reference to the NS level monitoring parameter
                that is aggregated";
            type leafref {
              path "../../../../monitoring-param/id";
            }
          }
        }
      }

      list vnfd-member {
        description "List of VNFs in this scaling group";
        key "member-vnf-index-ref";

        leaf member-vnf-index-ref {
          description "member VNF index of this member VNF";
          type leafref {
            path "../../../constituent-vnfd/member-vnf-index";
          }
        }

        leaf count {
          description
            "count of this member VNF  within this scaling group.
             The count allows to define  the number of instances
             when a scaling action targets this scaling group";
          type uint32;
          default 1;
        }
      }

      leaf min-instance-count {
        description
          "Minimum instances of the scaling group which are allowed.
          These instances are created by default when the network service
          is instantiated.";
        type uint32;
        default 0;
      }

      leaf max-instance-count {
        description
          "Maximum instances of this scaling group that are allowed
           in a single network service. The network service scaling
           will fail, when the number of service group instances
           exceed the max-instance-count specified.";
        type uint32;
        default 10;
      }

      list scaling-config-action {
        description "List of scaling config actions";
        key "trigger";

        leaf trigger {
          description "scaling trigger";
          type manotypes:scaling-trigger;
        }

        leaf ns-config-primitive-name-ref {
          description "Reference to the NS primitive";
          type leafref {
            path "../../../ns-configuration/config-primitive/name";
          }
        }
      }
    }


    list vnffgd {
      description
          "List of VNF Forwarding Graph Descriptors (VNFFGD).";

      key "id";

      uses fgd-common;

      list rsp {
        description
          "List of Rendered Service Paths (RSP).";
        key "id";

        uses rsp-common;

        list vnfd-connection-point-ref { // not common
          description
            "A list of references to connection points.";
          key "member-vnf-index-ref";

          leaf member-vnf-index-ref {
            description "Reference to member-vnf within constituent-vnfds";
            type leafref {
              path "../../../../constituent-vnfd/member-vnf-index";
            }
          }

          leaf order {
            type uint8;
            description
              "A number that denotes the order of a VNF in a chain";
          }

          leaf vnfd-id-ref {
            description
              "A reference to a vnfd. This is a
                  leafref to path:
                      ../../../../nsd:constituent-vnfd
                      + [nsd:id = current()/../nsd:id-ref]
                      + /nsd:vnfd-id-ref";

            type leafref {
                path "../../../../constituent-vnfd" +
                    "[member-vnf-index = current()/../member-vnf-index-ref]" +
                    "/vnfd-id-ref";
            }
          }

          leaf vnfd-ingress-connection-point-ref {
            description
              "A reference to a connection point name
                  in a vnfd. This is a leafref to path:
                      /vnfd:vnfd-catalog/vnfd:vnfd
                      + [vnfd:id = current()/../nsd:vnfd-id-ref]
                      + /vnfd:connection-point/vnfd:name
                  NOTE: An issue with confd is preventing the
                  use of xpath. Seems to be an issue with leafref
                  to leafref, whose target is in a different module.
                  Once that is resolved this will switched to use
                  leafref";
            // TODO: Keeping as string as this needs to be
            // diffenent lvel based of if it is nsd-catalog or
            // in nsr.
            // type leafref {
            //   path "../../../../../../vnfd:vnfd-catalog/vnfd:vnfd" +
            //        "[vnfd:id = current()/../vnfd-id-ref]/" +
            //        "vnfd:connection-point/vnfd:name";
            // }
            type string;
          }

          leaf vnfd-egress-connection-point-ref {
            description
              "A reference to a connection point name
                  in a vnfd. This is a leafref to path:
                      /vnfd:vnfd-catalog/vnfd:vnfd
                      + [vnfd:id = current()/../nsd:vnfd-id-ref]
                      + /vnfd:connection-point/vnfd:name
                  NOTE: An issue with confd is preventing the
                  use of xpath. Seems to be an issue with leafref
                  to leafref, whose target is in a different module.
                  Once that is resolved this will switched to use
                  leafref";
            // TODO: Keeping as string as this needs to be
            // diffenent lvel based of if it is nsd-catalog or
            // in nsr.
            // type leafref {
            //   path "../../../../../../vnfd:vnfd-catalog/vnfd:vnfd" +
            //        "[vnfd:id = current()/../vnfd-id-ref]/" +
            //        "vnfd:connection-point/vnfd:name";
            // }
            type string;
          }
        }
      } //rsp

      list classifier {
        description
            "List of classifier rules.";

        key "id";

        uses classifier-common;

        leaf member-vnf-index-ref {
          description "Reference to member-vnf within constituent-vnfds";
          type leafref {
            path "../../../constituent-vnfd/member-vnf-index";
          }
        }

        leaf vnfd-id-ref {
          description
              "A reference to a vnfd. This is a
                  leafref to path:
                      ../../../nsd:constituent-vnfd
                      + [nsd:id = current()/../nsd:id-ref]
                      + /nsd:vnfd-id-ref";

          type leafref {
              path "../../../constituent-vnfd" +
                   "[member-vnf-index = current()/../member-vnf-index-ref]" +
                   "/vnfd-id-ref";
          }
        }

        leaf vnfd-connection-point-ref {
          description
              "A reference to a connection point name
                  in a vnfd. This is a leafref to path:
                      /vnfd:vnfd-catalog/vnfd:vnfd
                      + [vnfd:id = current()/../nsd:vnfd-id-ref]
                      + /vnfd:connection-point/vnfd:name
                  NOTE: An issue with confd is preventing the
                  use of xpath. Seems to be an issue with leafref
                  to leafref, whose target is in a different module.
                  Once that is resolved this will switched to use
                  leafref";
          // TODO: Keeping as string as this needs to be
          // diffenent lvel based of if it is nsd-catalog or
          // in nsr.
          // type leafref {
          //     path "../../../../../vnfd:vnfd-catalog/vnfd:vnfd" +
          //          "[vnfd:id = current()/../vnfd-id-ref]/" +
          //          "vnfd:connection-point/vnfd:name";
          // }
          type string;
        }
      } // classifier

    } // vnffgd

    uses manotypes:ip-profile-list;

    container ns-configuration {
      description
        "Information about NS configuration.";

      uses manotypes:vca-configuration;
      uses manotypes:vca-relations;
    }

    uses manotypes:input-parameter-xpath;

    list parameter-pool {
      description
        "Pool of parameter values which must be
         pulled from during configuration";
      key "name";

      leaf name {
        description
            "Name of the configuration value pool";
        type string;
      }

      container range {
        description
            "Create a range of values to populate the pool with";

        leaf start-value {
          description
              "Generated pool values start at this value";
          type uint32;
          mandatory true;
        }

        leaf end-value {
          description
              "Generated pool values stop at this value";
          type uint32;
          mandatory true;
        }
      }
    }

    list key-pair {
      key "name";
      description "Used to configure the list of public keys to be injected as part
          of ns instantiation";

      leaf name {
        description "Name of this key pair";
        type string;
      }

      leaf key {
        description "Key associated with this key pair";
        type string;
      }
    }

    list user {
      key "name";
      description "List of users to be added through cloud-config";

      leaf name {
        description "Name of the user ";
        type string;
      }

      leaf user-info {
        description "The user name's real name";
        type string;
      }

      list key-pair {
        key "name";
        description "Used to configure the list of public keys to be injected as part
            of ns instantiation";

        leaf name {
          description "Name of this key pair";
          type string;
        }

        leaf key {
          description "Key associated with this key pair";
          type string;
        }
      }
    }
  } // nsd-descriptor-common

  grouping nsd-vld-common {
    /* Still having issues modelling this,
       see the comments under vnfd-connection-point-ref

       IMPORTANT: Change description fields
    */
    uses vld-common;

    choice init-params {
      description "Extra parameters for VLD instantiation";

      case vim-network-ref {
        leaf vim-network-name {
          description
            "Name of network in VIM account. This is used to indicate
                   pre-provisioned network name in cloud account.";
          type string;
        }
      }

      case vim-network-profile {
        leaf ip-profile-ref {
          description "Named reference to IP-profile object";
          type leafref {
            path "../../ip-profiles/name";
          }
        }
      }

    }
  } // nsd-vld-common

  grouping nsd-connection-point-common {
    description "NSD connection point base";
    //IMPORTANT: Change description fields
    leaf name {
      description
          "Name of the connection point.";
      type string;
    }

    leaf floating-ip-required {
      description
          "Boolean parameter to indicate whether the CP must be exposed.
           A public IP address will be allocated to this CP if exposed is true.
           The default is false meaning a floating IP address is not required.
           It must be explicitly asked for a floating IP address to be allocated.";
      type boolean;
    }
  } // nsd-connection-point-common

  grouping vld-common {
    description
      "List of Virtual Link Descriptors.";

    leaf id {
      description
        "Identifier for the VLD.";
      type string;
    }

    leaf name {
      description
        "Virtual Link Descriptor (VLD) name.";
      type string;
    }

    leaf short-name {
      description
        "Short name to appear as label in the UI";
      type string;
    }

    leaf vendor {
      description "Provider of the VLD.";
      type string;
    }

    leaf description {
      description "Description of the VLD.";
      type string;
    }

    leaf version {
      description "Version of the VLD";
      type string;
    }

    leaf type {
      type manotypes:virtual-link-type;
    }

    leaf root-bandwidth {
      description
        "For ELAN this is the aggregate bandwidth.";
      type uint64;
    }

    leaf leaf-bandwidth {
      description
        "For ELAN this is the bandwidth of branches.";
      type uint64;
    }

    // replicate for pnfd container here
    uses manotypes:provider-network;

    leaf mgmt-network {
      description "Flag indicating whether this network is a VIM management network";
      type boolean;
      default false;
    }
  } // vld-common

  grouping fgd-common {

    leaf id {
      description
          "Identifier for the FGD.";
      type string;
    }

    leaf name {
      description
          "FGD name.";
      type string;
    }

    leaf short-name {
      description
          "Short name to appear as label in the UI";
      type string;
    }

    leaf vendor {
      description "Provider of the FGD.";
      type string;
    }

    leaf description {
      description "Description of the FGD.";
      type string;
    }

    leaf version {
      description "Version of the FGD";
      type string;
    }
  } // fgd-common

  grouping rsp-common {

    leaf id {
      description
        "Identifier for the RSP.";
      type string;
    }

    leaf name {
      description
        "RSP name.";
      type string;
    }

  } // rsp-common

  grouping classifier-common {

    leaf id {
      description
          "Identifier for the classifier rule.";
      type string;
    }

    leaf name {
      description
          "Name of the classifier.";
      type string;
    }

    leaf rsp-id-ref {
      description
          "A reference to the RSP.";
      type leafref {
        path "../../rsp/id";
      }
    }

    list match-attributes {
      description
          "List of match attributes.";

      key "id";

      leaf id {
        description
            "Identifier for the classifier match attribute rule.";
        type string;
      }

      leaf ip-proto {
        description
            "IP Protocol.";
        type uint8;
      }

      leaf source-ip-address {
        description
            "Source IP address.";
        type inet:ip-address;
      }

      leaf destination-ip-address {
        description
            "Destination IP address.";
        type inet:ip-address;
      }

      leaf source-port {
        description
            "Source port number.";
        type inet:port-number;
      }

      leaf destination-port {
        description
            "Destination port number.";
        type inet:port-number;
      }
      //TODO: Add more match criteria
    } //match-attributes
  } // classifier-common

  grouping monitoring-param-common {
    description
      "List of monitoring parameters from VNF's that should be
        propogated up into NSR";

    leaf id {
      type string;
    }

    leaf name {
      type string;
    }

    uses manotypes:monitoring-param-value;
    uses manotypes:monitoring-param-ui-data;
    uses manotypes:monitoring-param-aggregation;
  } // monitoring-param-common
}