module bbf-device {

    yang-version 1.1;

    namespace "urn:bbf:yang:bbf-device";

    prefix bbf-dvc;

    import ietf-yang-types {
      prefix yang;
    }
    import ietf-inet-types {
      prefix inet;
    }
    import bbf-yang-types {
      prefix bbf-yang;
    }
    import bbf-device-types {
      prefix bbf-dvct;
    }
    import bbf-node-types {
      prefix bbf-nodet;
    }

    organization
      "Broadband Forum <https://www.broadband-forum.org>
Common YANG Work Area";

    contact
      "Comments or questions about this Broadband Forum YANG module
should be directed to <mailto:help@broadband-forum.org>.

Editor:      Nick Hancock, ADTRAN

Editor:      Ludwig Pauwels, Nokia

PS Leader:   Joey Boyd, ADTRAN

PS Leader:   Sowrirajan Padmanabhan, Nokia

WA Director: Joey Boyd, ADTRAN

WA Director: Sven Ooghe, Nokia";

    description
      "This module contains a collection of YANG definitions for
supporting the Broadband Forum requirements on managing physical
devices.

Copyright (c) 2017-2021, Broadband Forum

Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following
conditions are met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

2. 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.

3. Neither the name of the copyright holder 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 COPYRIGHT HOLDERS AND
CONTRIBUTORS "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 SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS 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.

The above license is used as a license under copyright only.
Please reference the Forum IPR Policy for patent licensing terms
<https://www.broadband-forum.org/ipr-policy>.

Any moral rights which are necessary to exercise under the above
license grant are also deemed granted under this license.

This version of this YANG module is part of TR-383a4; see
the TR itself for full legal notices.";

    revision "2021-06-02" {
      description
        "Amendment 4.
* Approval Date:    2021-06-02.
* Publication Date: 2021-06-02.";
      reference
        "TR-383a4: Common YANG Modules
        	  <https://www.broadband-forum.org/technical/download/
        		   TR-383_Amendment-4.pdf>";

    }


    feature reports-device-powering-state {
      description
        "Indicates the support for reporting the device powering
state.";
    }

    grouping device-alias {
      description
        "Alias information for the device.";
      leaf alias {
        type bbf-yang:string-ascii64;
        description
          "The alias that can be used to identify a device.";
      }
    }  // grouping device-alias

    grouping hardware-management-info {
      description
        "The hardware related information for the device.";
      leaf device-type {
        type identityref {
          base bbf-dvct:device-type;
        }
        description "The type of device.";
      }

      leaf serial-num {
        type bbf-yang:string-ascii64;
        description
          "The vendor-specific serial number string for the device. The
preferred value is the serial number string actually printed
on the device itself (if present).";
        reference
          "RFC 6933: Entity MIB (Version 4) - entPhysicalSerialNum";

      }

      leaf mfg-name {
        type bbf-yang:string-ascii64;
        description
          "The name of the manufacturer of this physical device. The
preferred value is the manufacturer name string actually
printed on the device itself (if present).

Note that comparisons between instances of the 'model-name'
and 'serial-num' nodes are only meaningful amongst devices
with the same value of 'mfg-name'.";
        reference
          "RFC 6933: Entity MIB (Version 4) - entPhysicalMfgName";

      }

      leaf model-name {
        type bbf-yang:string-ascii64;
        description
          "The vendor-specific model name identifier string associated
with this physical device.  The preferred value is the
customer-visible part number, which may be printed on the
component itself.";
        reference
          "RFC 6933: Entity MIB (Version 4) - entPhysicalModelName";

      }
    }  // grouping hardware-management-info

    grouping software-management-info-state {
      description
        "State data nodes relating to information that identifies a
software component within the device.";
      leaf software-type {
        type identityref {
          base bbf-nodet:software-type;
        }
        config false;
        description "The type of software.";
      }

      leaf current-revision {
        type bbf-yang:string-ascii64;
        config false;
        description
          "A name to be used to identify the revision of the software
that is currently executing within the device.";
      }

      leaf previous-revision {
        type bbf-yang:string-ascii64;
        config false;
        description
          "A name to be used to identify the revision of the software
that was previously executing within the device.

If the device does not have have previous revision then an
empty string is returned.";
      }

      leaf current-revision-last-changed {
        type yang:date-and-time;
        config false;
        description
          "Date and time the current revision last changed.";
      }
    }  // grouping software-management-info-state

    grouping device-management-info {
      description
        "Data nodes relating to management plane information needed to
reach and communicate with the device.";
      leaf ip-address {
        type inet:host;
        description
          "The IP address of the device.";
      }

      leaf port {
        type inet:port-number;
        description
          "The port number used on the device for
management.";
      }

      leaf admin-state {
        type bbf-nodet:admin-state;
        description
          "The administrative state of the device.";
      }
    }  // grouping device-management-info

    grouping device-management-info-state {
      description
        "State data nodes relating to management plane information
needed to reach and communicate with the device.";
      leaf admin-state-last-changed {
        type yang:date-and-time;
        config false;
        description
          "The date and time the device's administrative state last
changed.";
      }

      leaf powering-state {
        if-feature bbf-dvc:reports-device-powering-state;
        type enumeration {
          enum "unpowered" {
            value 0;
            description
              "The device is considered to be without power.";
          }
          enum "powered" {
            value 1;
            description
              "The device is considered to be powered.";
          }
        }
        config false;
        description
          "The powering state of the device.

This information is typically provided using status
information (dying gasp) from the device.

If the device is reachable it is considered powered.";
      }

      leaf powering-state-last-changed {
        if-feature bbf-dvc:reports-device-powering-state;
        type yang:date-and-time;
        config false;
        description
          "The last date and time that the device powering state last
changed.";
      }

      leaf reachability-state {
        type enumeration {
          enum "unreachable" {
            value 0;
            description
              "The device is considered to be unreachable for management
purposes.";
          }
          enum "reachable" {
            value 1;
            description
              "The device is considered to be reachable for management
purposes if at least 1 management entity can reach
the device. This typically means that device is reachable
via the IP layer.";
          }
        }
        config false;
        description
          "The reachability state of the device for management
purposes.";
      }

      leaf reachability-state-last-changed {
        type yang:date-and-time;
        config false;
        description
          "The last date and time that the device reachability state
last changed.";
      }

      leaf management-session-state {
        type enumeration {
          enum "down" {
            value 0;
            description
              "The management session to the device is down.";
          }
          enum "up" {
            value 1;
            description
              "The management session to the device is up if at least 1
management session has been established to the device.";
          }
        }
        config false;
        description
          "The management session state to the device.";
      }

      leaf management-session-state-last-changed {
        type yang:date-and-time;
        config false;
        description
          "The date and time that the device management session state
last changed.";
      }
    }  // grouping device-management-info-state
  }  // module bbf-device