module frr-pathd {
  yang-version 1.1;
  namespace "http://frrouting.org/yang/pathd";
  prefix frr-pathd;

  import ietf-inet-types {
    prefix inet;
  }
  import ietf-yang-types {
    prefix yang;
  }
  import ietf-routing-types {
    prefix rt-types;
  }
  import frr-interface {
    prefix frr-interface;
  }

  organization
    "Free Range Routing";
  contact
    "FRR Users List:       <mailto:frog@lists.frrouting.org>
     FRR Development List: <mailto:dev@lists.frrouting.org>";
  description
    "This module defines a model for managing FRR pathd daemon.";

  revision 2018-11-06 {
    description
      "Initial revision.";
  }

  typedef protocol-origin-type {
    description
      "Indication for the protocol origin of an object.";
    type enumeration {
      enum pcep {
        value 1;
        description "The object was created through PCEP";
      }
      enum bgp {
        value 2;
        description "The object was created through GBP";
      }
      enum local {
        value 3;
        description "The object was created through CLI, Yang model via Netconf, gRPC, etc";
      }
    }
  }

  typedef originator-type {
        type string {
          length "1..64";
        }
        description
          "Identifier of the originator of an object, could be 'config', '1.1.1.1:4189' or '2001:db8:85a3::8a2e:370:7334:4189'";
      }

  container pathd {
    container srte {
      list segment-list {
        key "name";
        description "Segment-list properties";
        leaf name {
          type string {
            length "1..64";
          }
          description "Segment-list name";
        }
        leaf protocol-origin {
          type protocol-origin-type;
          mandatory true;
          description
            "Indication for the protocol origin of the segment list.";
        }
        leaf originator {
          type originator-type;
          mandatory true;
          description "Originator of the segment list";
        }
        list segment {
          key "index";
          description "Configure Segment/hop at the index";
          leaf index {
            type uint32;
            description "Segment index";
	  }
        leaf sid-value {
          type rt-types:mpls-label;
          description "MPLS label value";
        }
        container nai {
          presence "The segment has a Node or Adjacency Identifier";
          leaf type {
            description "NAI type";
            mandatory true;
            type enumeration {
              enum ipv4_node {
                value 1;
                description "IPv4 node identifier";
              }
              enum ipv6_node {
                value 2;
                description "IPv6 node identifier";
              }
              enum ipv4_adjacency {
                value 3;
                description "IPv4 adjacency";
              }
              enum ipv6_adjacency {
                value 4;
                description "IPv6 adjacency";
              }
              enum ipv4_unnumbered_adjacency {
                value 5;
                description "IPv4 unnumbered adjacency";
              }
              enum ipv4_local_iface {
                value 7;
                description "IPv4 prefix with local interface id";
              }
              enum ipv6_local_iface {
                value 8;
                description "IPv6 prefix with local interface id";
              }
              enum ipv4_algo {
                value 9;
                description "IPv4 prefix with optional algorithm";
              }
              enum ipv6_algo {
                value 10;
                description "IPv6 prefix with optional algorithm";
              }
            }
          }
          leaf local-address {
            type inet:ip-address;
            mandatory true;
          }
          leaf local-prefix-len {
            type uint8;
            mandatory true;
            when "../type = 'ipv4_local_iface' or ../type = 'ipv6_local_iface' or ../type = 'ipv4_algo' or ../type = 'ipv6_algo'";
          }
          leaf local-interface {
            type uint32;
            mandatory true;
            when "../type = 'ipv4_local_iface' or ../type = 'ipv6_local_iface' or ../type = 'ipv4_unnumbered_adjacency'";
          }
          leaf remote-address {
            type inet:ip-address;
              mandatory true;
              when "../type = 'ipv4_adjacency' or ../type = 'ipv6_adjacency' or ../type = 'ipv4_unnumbered_adjacency'";
            }
            leaf remote-interface {
              type uint32;
              mandatory true;
              when "../type = 'ipv4_unnumbered_adjacency'";
            }
          leaf algorithm {
            type uint8;
            mandatory true;
            when "../type = 'ipv4_algo' or ../type = 'ipv6_algo'";
          }
          }
        }
      }
      list policy {
        key "color endpoint";
        unique "name";
        leaf color {
          type uint32;
          description
            "Color of the SR Policy.";
        }
        leaf endpoint {
          type inet:ip-address;
          description
            "Indication for the endpoint of the SR Policy.";
        }
        leaf name {
          type string {
            length "1..64";
          }
          description
            "Name of the SR Policy.";
        }
        leaf binding-sid {
          type rt-types:mpls-label;
          description
            "BSID of the SR Policy.";
        }
        leaf is-operational {
          type boolean;
          config false;
          description
            "True if a valid candidate path of this policy is operational in zebra, False otherwise";
        }
        list candidate-path {
          unique "name";
          description
            "List of Candidate Paths of the SR Policy.";
          key "preference";
          leaf preference {
            type uint32;
            description
              "Administrative preference.";
          }
          leaf name {
            type string {
              length "1..64";
            }
            mandatory true;
            description
              "Symbolic Name of the Candidate Path.";
          }
          leaf is-best-candidate-path {
            type boolean;
            config false;
            description
              "True if the candidate path is the best candidate path, False otherwise";
          }
          leaf protocol-origin {
            type protocol-origin-type;
            mandatory true;
            description
              "Indication for the protocol origin of the Candidate Path.";
          }
          leaf originator {
            type originator-type;
            mandatory true;
            description "Originator of the candidate path";
          }
          leaf discriminator {
            type uint32;
            config false;
            description "Candidate path distinguisher";
          }
          leaf type {
            description
              "Type of the Candidate Path.";
            mandatory true;
            type enumeration {
              enum explicit {
                value 1;
              }
              enum dynamic {
                value 2;
              }
            }
          }
          leaf segment-list-name {
            type leafref {
              path ../../../segment-list/name;
            }
            description
              "The name of the Segment List to use as LSP.";
          }
          container constraints {
            when "../type = 'dynamic'";
            description
              "Generic dynamic path constraints";
            container bandwidth {
              presence "If the candidate has a bandwidth constraint";
              description
                "The bandwidth needed by the candidate path.";
              leaf required {
                type boolean;
                default "true";
                description
                  "If the bandwidth limitation is a requirement or only a suggestion";
              }
              leaf value {
                mandatory true;
                type decimal64 {
                    fraction-digits 6;
                }
              }
            }
            container affinity {
              description
                "Affinity let you configure how the links should be used when calculating a path.";
              leaf exclude-any {
                type uint32;
                description
                  "A 32-bit vector representing a set of attribute filters which renders a link unacceptable.";
              }
              leaf include-any {
                type uint32;
                description
                  "A 32-bit vector representing a set of attribute filters which renders a link acceptable. A null set (all bits set to zero) automatically passes.";
              }
              leaf include-all {
                type uint32;
                description
                  "A 32-bit vector representing a set of attribute filters which must be present for a link to be acceptable.  A null set (all bits set to zero) automatically passes.";
              }
            }
            list metrics {
              key "type";
              leaf type {
                description
                  "Type of the metric.";
                type enumeration {
                  enum igp {
                    value 1;
                    description "IGP metric";
                  }
                  enum te {
                    value 2;
                    description "TE metric";
                  }
                  enum hc {
                    value 3;
                    description "Hop Counts";
                  }
                  enum abc {
                    value 4;
                    description "Aggregate bandwidth consumption";
                  }
                  enum lmll {
                    value 5;
                    description "Load of the most loaded link";
                  }
                  enum cigp {
                    value 6;
                    description "Cumulative IGP cost";
                  }
                  enum cte {
                    value 7;
                    description "Cumulative TE cost";
                  }
                  enum pigp {
                    value 8;
                    description "P2MP IGP metric";
                  }
                  enum pte {
                    value 9;
                    description "P2MP TE metric";
                  }
                  enum phc {
                    value 10;
                    description "P2MP hop count metric";
                  }
                  enum msd {
                    value 11;
                    description "Segment-ID (SID) Depth";
                  }
                  enum pd {
                    value 12;
                    description "Path Delay metric";
                  }
                  enum pdv {
                    value 13;
                    description "Path Delay Variation metric";
                  }
                  enum pl {
                    value 14;
                    description "Path Loss metric";
                  }
                  enum ppd {
                    value 15;
                    description "P2MP Path Delay metric";
                  }
                  enum ppdv {
                    value 16;
                    description "P2MP Path Delay variation metric";
                  }
                  enum ppl {
                    value 17;
                    description "P2MP Path Loss metric";
                  }
                  enum nap {
                    value 18;
                    description "Number of adaptations on a path";
                  }
                  enum nlp {
                    value 19;
                    description "Number of layers on a path";
                  }
                  enum dc {
                    value 20;
                    description "Domain Count metric";
                  }
                  enum bnc {
                    value 21;
                    description "Border Node Count metric";
                  }
                }
              }
              leaf required {
                type boolean;
                default "true";
                description
                  "If the metric is a requirement, or if it is only a suggestion";
              }
              leaf is-bound {
                type boolean;
                description
                  "Defines if the value is a bound (a maximum) for the path metric that must not be exceeded.";
              }
              leaf is-computed {
                type boolean;
                description
                  "Defines if the value has been generated by the originator of the path.";
              }
              leaf value {
                mandatory true;
                type decimal64 {
                    fraction-digits 6;
                }
              }
            }
            container objective-function {
              presence "If the candidate has an objective function constraint";
              description
                "Define objective function constraint as a list of preferred functions";
              leaf required {
                type boolean;
                default "true";
                description
                  "If an objective function is a requirement, or if it is only a suggestion";
              }
              leaf type {
                description
                  "Type of objective function.";
                mandatory true;
                type enumeration {
                  enum mcp {
                    value 1;
                    description "Minimum Cost Path";
                  }
                  enum mlp {
                    value 2;
                    description "Minimum Load Path";
                  }
                  enum mbp {
                    value 3;
                    description "Maximum residual Bandwidth Path";
                  }
                  enum mbc {
                    value 4;
                    description "Minimize aggregate Bandwidth Consumption";
                  }
                  enum mll {
                    value 5;
                    description "Minimize the Load of the most loaded Link";
                  }
                  enum mcc {
                    value 6;
                    description "Minimize the Cumulative Cost of a set of paths";
                  }
                  enum spt {
                    value 7;
                    description "Shortest Path Tree";
                  }
                  enum mct {
                    value 8;
                    description "Minimum Cost Tree";
                  }
                  enum mplp {
                    value 9;
                    description "Minimum Packet Loss Path";
                  }
                  enum mup {
                    value 10;
                    description "Maximum Under-Utilized Path";
                  }
                  enum mrup {
                    value 11;
                    description "Maximum Reserved Under-Utilized Path";
                  }
                  enum mtd {
                    value 12;
                    description "Minimize the number of Transit Domains";
                  }
                  enum mbn {
                    value 13;
                    description "Minimize the number of Border Nodes";
                  }
                  enum mctd {
                    value 14;
                    description "Minimize the number of Common Transit Domains";
                  }
                  enum msl {
                    value 15;
                    description "Minimize the number of Shared Links";
                  }
                  enum mss {
                    value 16;
                    description "Minimize the number of Shared SRLGs";
                  }
                  enum msn {
                    value 17;
                    description "Minimize the number of Shared Nodes";
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}