[email protected]

module ietf-pcep-srv6 {

    yang-version 1.1;

    namespace "urn:ietf:params:xml:ns:yang:ietf-pcep-srv6";
    prefix ps;


    import ietf-te-types {
       prefix "te-types";
       reference "RFC XXXX";
    }

    import ietf-pcep {
       prefix p;
       reference "RFC XXXX";
    }

    import ietf-srv6-types {
        prefix st;
        reference "RFC XXXX";
    }

    organization
        "IETF PCE (Path Computation Element) Working Group";

    contact
        "WG Web:   <http://tools.ietf.org/wg/pce/>
         WG List:  <mailto:pce@ietf.org>
         Editor:   Dhruv Dhody
                   <mailto:dhruv.ietf@gmail.com>";
    description
        "The YANG module augments the PCEP yang operational
        model with SRv6";


    revision 2018-10-12 {
        description "Initial revision.";
        reference
            "RFC XXXX:  A YANG Data Model for Path Computation
                        Element Communications Protocol
                        (PCEP) - Segement Routing in IPv6
                        (SRv6)";
    }


    identity path-setup-srv6 {
        base te-types:path-signaling-type;
        description
          "SRv6 path setup type";
    }

    feature srv6 {
        description
            "Support Segment Routing in IPv6 (SRv6) for PCE.";
    }

    grouping srv6 {
        description
            "SRv6";
        container srv6 {
            if-feature srv6;
            description
                "If SRv6 is supported";
            leaf enabled{
                type boolean;
                description
                    "Enabled or Disabled";
            }
            leaf max-sl {
                type uint8;
                description
                    "Max value of the segment left field in SRH";
            }
            leaf sl-limit{
                type boolean;
                default false;
                description
                    "True indicates no limit on SL, the
                    leaf max-sl is ignored";
            }
        }
    }

    grouping segment-list {
        description
            "Segment list grouping";
        container segment-list {
            description
                "Segments for given segment list";

            list segment {
                key "index";
                description "Configure Segment/hop at the index";
                uses segment-properties;
            }
        }
    }

    grouping segment-properties {
        description "Segment properties grouping";
        leaf index {
            type uint32;
            description "Segment index";
        }
        leaf sid-value {
            type st:srv6-sid;
            description "SRv6 SID value";
        }
    }


    /*
     * Augment modules to add SRv6
     */
    augment "/p:pcep/p:entity/p:capability"{
        description
            "Augmenting SRv6";
        uses srv6;
    }
    augment "/p:pcep/p:entity/p:peers/p:peer/p:capability"{
        description
            "Augmenting SRv6";
        uses srv6;
    }
    augment "/p:pcep/p:entity/p:lsp-db/p:lsp"{
        description
            "Augmenting SRv6";
        container srv6 {
            when "/p:pcep/p:entity/p:lsp-db/p:lsp/pst = 'path-setup-srv6'" {
                description
                    "For SRv6 path";
            }
            if-feature srv6;
            uses segment-list;
            description
                "SRv6";
        }
    }
    
}//module