module org-openroadm-rstp {
  namespace "http://org/openroadm/rstp";
  prefix org-openroadm-rstp;

  import org-openroadm-device {
    prefix org-openroadm-device;
  }

  organization "Open ROADM MSA";
  contact
    "OpenROADM.org";
  description
    "YANG definitions for rstp protocol. 
     
     
     Copyright of the Members of the Open ROADM MSA Agreement dated (c) 2016, 
     AT&T Intellectual Property.  All other rights reserved.
     
     Redistribution and use in source and binary forms, with or without modification, 
     are permitted provided that the following conditions are met:
     
     * Redistributions of source code must retain the above copyright notice, this 
       list of conditions and the following disclaimer.
     * Redistributions in binary form must reproduce the above copyright notice, 
       this list of conditions and the following disclaimer in the documentation and/or 
       other materials provided with the distribution.
     * Neither the Members of the Open ROADM MSA Agreement nor the names of its 
       contributors may be used to endorse or promote products derived from this software 
       without specific prior written permission.
     
     THIS SOFTWARE IS PROVIDED BY THE MEMBERS OF THE OPEN ROADM MSA  AGREEMENT ''AS IS'' 
     AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
     IN NO EVENT THE MEMBERS OF THE OPEN ROADM MSA  AGREEMENT BE LIABLE FOR ANY DIRECT, 
     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;  LOSS OF USE, DATA, 
     OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
     WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
     POSSIBILITY OF SUCH DAMAGE.";

  revision 2016-10-14 {
    description
      "Version 1.2";
  }

  typedef bridge-id-type {
    type string;
    description
      "Unique Bridge Identifier";
  }

  grouping rstp-common-bridge-config {
    leaf bridge-priority {
      description
        "Bridge Priority Value";
      type uint32 {
        range "0..61440";
      }
      default "32768";
    }
    leaf shutdown {
      description
        "Bridge admin state";
      type empty;
    }
    leaf hold-time {
      description
        "The time interval during which no more than two
            BPDUs transmitted by this node in seconds - not used in rstp mode (in seconds)";
      type uint32 {
        range "1..10";
      }
      default "2";
    }
    leaf hello-time {
      description
        "The time between the transmission of BPDU's by this node on any
            port, when role is rooti (in seconds)";
      type uint32 {
        range "1..10";
      }
      default "2";
    }
    leaf max-age {
      description
        "The value that all bridges use for MaxAge when this bridge
            is acting as the root";
      type uint32 {
        range "6..40";
      }
      default "20";
    }
    leaf forward-delay {
      description
        "The port on the Switch spends this time in the listening
            state while moving from the blocking state to the forwarding state (in seconds)";
      type uint32 {
        range "4..30";
      }
      default "15";
    }
    leaf transmit-hold-count {
      description
        "Maximum BPDU transmission rate";
      type uint32 {
        range "1..10";
      }
      default "2";
    }
  }

  grouping rstp-root-bridge-attr {
    leaf root-bridge-port {
      description
        "Port id of the root port";
      type uint32;
    }
    leaf root-path-cost {
      description
        "The cost of the path to the root as
               seen from this bridge";
      type uint32;
    }
    leaf root-bridge-priority {
      description
        "Root Bridge Priority Value";
      type uint32;
    }
    leaf root-bridge-id {
      description
        "Root Bridge identifier";
      type bridge-id-type;
    }
    leaf root-hold-time {
      description
        "The time interval during which no more than two
               BPDUs transmitted by this node in seconds at root node (in seconds)";
      type uint32;
    }
    leaf root-hello-time {
      description
        "The time between the transmission of BPDU's used at root node (in seconds)";
      type uint32;
    }
    leaf root-max-age {
      description
        "The value that all bridges use for MaxAge used at root node";
      type uint32;
    }
    leaf root-forward-delay {
      description
        "The time in seconds spent on the listening state used at root node (in seconds)";
      type uint32;
    }
  }

  grouping rstp-bridge-port-state-attr {
    list rstp-bridge-port-table {
      max-elements "15";
      description
        "This table contains port-specific information for rstp state attributes";
      key "ifname";
      leaf ifname {
        description
          "Interface name of the port";
        type string {
          length "1..255";
        }
      }
      leaf bridge-port-state {
        description
          "The port's current state";
        type enumeration {
          enum "discarding";
          enum "blocked";
          enum "learning";
          enum "forwarding";
          enum "unknown";
        }
      }
      leaf bridge-port-role {
        description
          "The role payed by this port in the bridge";
        type enumeration {
          enum "designated";
          enum "root";
          enum "alternate";
          enum "disabled";
          enum "backup";
          enum "unknown";
        }
      }
      leaf bridge-port-id {
        description
          "Unique port id of this port";
        type uint32;
      }
      leaf oper-edge-bridge-port {
        description
          "The operational value of the Edge Port parameter";
        type empty;
      }
      leaf designated-bridge-port {
        description
          "Port id of the designated port";
        type uint32;
      }
      leaf designated-bridgeid {
        description
          "The Bridge Identifier of the bridge that this port considers 
           to be the Designated Bridge for this port's segment";
        type bridge-id-type;
      }
    }
  }

  grouping rstp-bridge-port-attr {
    list rstp-bridge-port-table {
      max-elements "15";
      description
        "Table contains port-specific information for rstp config";
      key "ifname";
      leaf ifname {
        description
          "Interface name of the port";
        type leafref {
          path "/org-openroadm-device:org-openroadm-device/org-openroadm-device:interface/org-openroadm-device:name";
        }
      }
      leaf cost {
        description
          "The contribution of this port to the path cost of
                 paths towards the spanning tree root which include this port also";
        type uint32 {
          range "2000..200000";
        }
        default "20000";
      }
      leaf priority {
        description
          "The value of the priority field";
        type uint32 {
          range "0..240";
        }
      }
    }
  }

  grouping rstp-container {
    container rstp {
      description
        "Open ROADM RSTP top level";
      list rstp-bridge-instance {
        max-elements "1";
        description
          "rstp bridge instance, max instance = 1";
        key "bridge-name";
        leaf bridge-name {
          description
            "unique name of the bridge";
          type string {
            length "1..255";
          }
        }
        container rstp-config {
          description
            "Collection of rstp configuration attributes";
          uses rstp-common-bridge-config;
          uses rstp-bridge-port-attr;
        }
        container rstp-state {
          description
            "Collection of rstp operational attributes";
          config false;
          container rstp-bridge-attr {
            description
              "Collection of operational rstp bridge attributes";
            uses rstp-root-bridge-attr;
            leaf bridge-id {
              description
                "Bridge identifier of the bridge";
              type bridge-id-type;
            }
            leaf topo-change-count {
              description
                "The total number of topology changes";
              type uint32;
            }
            leaf time-since-topo-change {
              description
                "Time since last topology changes occured (in seconds)";
              type uint32;
            }
          }
          container rstp-bridge-port-attr {
            description
              "Collection of operational rstp port related attributes";
            uses rstp-bridge-port-state-attr;
          }
        }
      }
    }
  }

  augment "/org-openroadm-device:org-openroadm-device/org-openroadm-device:protocols" {
    when "/org-openroadm-device:org-openroadm-device/org-openroadm-device:info/org-openroadm-device:node-type='rdm'";
    uses rstp-container;
  }
}