module ietf-yang-mpl-seeds {

    yang-version 1.1;

    namespace
      "urn:ietf:params:xml:ns:yang:ietf-yang-mpl-seeds";

    prefix mplse;

    import ietf-yang-mpl-domain {
      prefix mpl;
    }

    organization
      "IETF ROLL (Routing over Low power and lossy networks)
 Working Group";

    contact
      "WG Web:   http://tools.ietf.org/wg/roll/
     WG List:  mailto:roll@ietf.org

     WG Chair: Peter van der Stok
               mailto:consultancy@vanderstok.org

     WG Chair: Ines Robles
               mailto:maria.ines.robles@ericsson.com

     Editor:   Peter van der Stok
               mailto:consultancy@vanderstok.org";

    description
      "This module contains information about the operation
      of the MPL protocol.

     Copyright (c) 2018 IETF Trust and the persons identified as
     authors of the code.  All rights reserved.

     Redistribution and use in source and binary forms, with or

     without modification, is permitted pursuant to, and subject
     to the license terms contained in, the Simplified BSD License
     set forth in Section 4.c of the IETF Trust's Legal Provisions
     Relating to IETF Documents
     (http://trustee.ietf.org/license-info).

     This version of this YANG module is part of RFC XXXX; see
     the RFC itself for full legal notices.";

    revision "2018-07-06" {
      description "revision 3";
      reference
        "I-D:draft-ietf-roll-mpl-yang: A YANG model for Multicast
        Protocol for Low power and lossy Networks (MPL)";

    }


    augment /mpl:domain {
      description
        "additional message buffer status to MPL
       domains";
      leaf SE_LIFETIME {
        type uint16;
        units "milliseconds/timer units";
        description
          "Conversion from clock ticks to milliseconds,
            equivalent to SEED_SET_ENTRY_LIFETIME/TUNIT as
            specified in [RFC7774].";
      }

      list mpl-seeds {
        key "seedID domainID";
        config false;
        description
          "List describes all seeds that are active in the
            server. Seed information contains the message buffer
            contents and the operational values of I, c, sequence
            number and the life-times per message.";
        leaf seedID {
          type uint64;
          description
            "value uniquely identifies the MPL Seed within a MPL
             domain.";
        }

        leaf domainID {
          type uint16;
          description
            "together with seedID uniquely identifies buffer
             set.";
        }

        leaf local {
          type boolean;
          description
            "When local == true, seed originated in this
             forwarder.
             When local == false, seed originated in different
             forwarder.";
        }

        leaf generate-seqno {
          type uint8;
          description
            "Sequence number of next message to be generated by
            this local seed.";
        }

        leaf life-time {
          type uint64;
          units "milliseconds";
          description
            "Minimum remaining lifetime of the seed entry in
            milliseconds.";
        }

        leaf min-seqno {
          type uint8;
          description
            "Lower bound sequence number in the buffer of the
            seed.";
        }

        leaf data-number {
          type uint8;
          description
            "Number of currently buffered data messages.";
        }

        leaf control-number {
          type uint8;
          description
            "Number of currently buffered control messages.";
        }

        list buffered-messages {
          key "seqno";
          description
            "status of trickle intervals of the buffered message
             identified by seqno. and seed/domain";
          leaf seqno {
            type uint8;
            description
              "Sequence number of message.";
          }

          leaf I {
            type uint8;
            units "milliseconds";
            description
              "Current Trickle timer interval size in
                milliseconds.
                mpl-ops/mpl-parameter/DATA_MESSAGE_IMIN <=
                mpl-seeds/buffered-messages/I <=
                mpl-ops/mpl-parameter/DATA_MESSAGE_IMAX";
          }

          leaf c {
            type uint8;
            description
              "number of times that a copy of this message has
                been received in this interval.";
          }

          leaf e {
            type uint8;
            description
              "number of Trickle time expirations since last
                Trickle timer reset.";
          }

          leaf t {
            type uint8;
            units "milliseconds";
            description
              "Time expressed in milliseconds
                that message will be (is) forwarded.
                mpl-seeds/buffered-messages/t <
                mpl-seeds/buffered-messages/I";
          }
        }  // list buffered-messages
      }  // list mpl-seeds
    }
  }  // module ietf-yang-mpl-seeds