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

  import frr-routing {
    prefix frr-rt;
  }

  import ietf-inet-types {
    prefix inet;
  }

  import frr-interface {
    prefix frr-interface;
  }

  import frr-route-map {
    prefix frr-route-map;
  }

  import frr-route-types {
    prefix frr-route-types;
  }

  organization
    "FRRouting";
  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 OSPFd information.
     This YANG module augments the basic routing with additional
     OSPF information";

  revision 2020-07-21 {
    description
      "Initial revision.";
  }

  identity ospf {
    base frr-rt:routing-protocol;
    description
      "'OSPF' routing ospf-protocol.";
  }

  /* Policy types to be removed later, once policy Yang finalized */
  typedef plist-ref {
    type string;
  }

  typedef access-list-ref {
    type string;
  }

  typedef ospf-area-id {
    type union {
      type inet:ipv4-address;
      type uint32;
    }
    description "OSPF Area ID.";
  }

  grouping nssa-grouping {
    container nssa {
      presence "Present if the nssa is enabled";
      leaf no-summary {
        type boolean;
        default "false";
        description
          "Do not inject inter-area routes into nssa";
      }

      leaf translate-always {
        type boolean;
        default "false";
        description
          "NSSA-ABR to always translate";
      }

      leaf translate-candidate {
        type boolean;
        default "false";
        description
          "NSSA-ABR for translate election";
      }

      leaf translate-never {
        type boolean;
        default "false";
        description
          "NSSA-ABR to never translate";
      }
    }
  }

  grouping range-grouping {
    container ranges {
      list range {
        key "prefix";
        description
          "A list of range objects";
        leaf prefix {
          type inet:ipv4-prefix;
          description
            "Area range prefix";
        }

        leaf advertise {
          type boolean;
          description
            "Advertise this range";
        }

        leaf not-advertise {
          type boolean;
          default "false";
          description
            "Do not advertise this range";
        }

        leaf cost {
          type uint32 {
            range "0..16777215";
          }
          description
            "Metric for this range";
        }

        leaf substitute {
          type inet:ipv4-prefix;
          description
            "Network prefix to be announced instead of range";
        }
      }
    }
  }

  grouping stub-grouping {
    container stub {
      presence "Present when area is stub";
      leaf no-summary {
        type boolean;
        default "false";
        description
          "Do not inject inter-area routes into stub";
      }
    }
  }

  grouping shortcut-grouping {
    container shortcut {
      leaf default {
        type boolean;
        default "false";
        description
          "Default shortcutting behavior";
      }

      leaf disable {
        type boolean;
        description
          "Disable shortcutting through the area";
      }

      leaf enable {
        type boolean;
        description
          "Enable shortcutting through the area";
      }
    }
  }

  grouping authentication-group {
    container authentication {
      presence "Enable authentication.";
      description
        "Enable authentication on this virtual link.";
      leaf message-digest {
        type boolean;
        description
          "Use message-digest authentication.";
      }

      leaf null {
        type boolean;
        description
          "Use null authentication.";
      }
    }

    list message-digest-key {
      key "key-id";
      leaf key-id {
        type uint8;
        description
          "Key id";
      }

      leaf mds-key {
        type string;
        description
          "The OSPF password.";
      }
    }

    leaf authentication-key {
      type string;
      description
        "The OSPF password.";
    }
  }

  grouping virtual-link-group {
    list virtual-link {
      key "neighbor area-id";
      description
        "Virtual link parameters.";
      leaf neighbor {
        type inet:ipv4-address;
        description
          "Router ID of the remote ABR.";
      }

      leaf area-id {
        mandatory true;
        type ospf-area-id;
      }

      uses authentication-group;

      container timers {
        leaf dead-interval {
          type uint16;
          units "seconds";
          description
            "Interval time after which a neighbor is declared down.";
        }

        leaf hello-interval {
          type uint16 {
            range "1..65535";
          }
          units "seconds";
          description
            "Time between HELLO packets.";
        }

        leaf retransmit-interval {
          type uint16 {
            range "1..65535";
          }
          units "seconds";
          description
            "Time between retransmitting lost link state advertisements.";
        }

        leaf transmit-delay {
          type uint16 {
            range "1..65535";
          }
          units "seconds";
          description
            "Link state transmit delay.";
        }
      }
    }
  }

  grouping area-groupings {
    container areas {
      list area {
        key "area-id";
        description
          "A list of area objects";
        leaf area-id {
          type ospf-area-id;
        }

        container authentication {
          presence "Enable authentication";
          leaf message-digest {
            type boolean;
            description
              "Use message-digest authentication";
          }
        }

        leaf default-cost {
          type uint32 {
            range "0..16777215";
          }
          description
            "Advertised default summary cost";
        }

        leaf export-list {
          type access-list-ref;
          description
            "Filter for networks announced to other areas.";
        }

        leaf import-list {
          type access-list-ref;
          description
            "Filter for networks from other areas announced to the specified one.";
        }

        container filter-list {
          leaf prefix {
            type plist-ref;
            description
              "Filter networks between OSPF areas.";
          }

          leaf in {
            type boolean;
          }

          leaf out {
            type boolean;
          }
        }

        uses nssa-grouping;

        uses range-grouping;

        uses stub-grouping;

        uses shortcut-grouping;

        uses virtual-link-group;
      }
    }
  }

  /* router ospf attributes */
  grouping route-ospf-leaf-attributes {
    leaf auto-cost-reference-bandwidth {
      type uint32 {
        range "1..4294967";
      }
      units "Mbits";
      description
        "The reference bandwidth in terms of Mbits per second.";
    }

    leaf use-arp {
      type boolean;
      default "true";
      description 
        "ARP for neighbor table entry.";
    }

    leaf capability-opaque {
      type boolean;
      default "false";
      description
        "Opaque LSA.";
    }

    leaf compatible-rfc1583 {
      type boolean;
      description
        "Compatible with RFC 1583.";
    }

    leaf default-metric {
      type uint32 {
        range "0..16777214";
      }
      description
        "Metric of redistributed routes.";
    }

    leaf write-multiplier {
      type uint8 {
        range "1..100";
      }
      description
        "Maximum number of interfaces serviced per write.";
    }

    container router-info {
      choice router-info {
        case as {
          leaf as {
            type boolean;
            description
              "Enable the Router Information functionality with AS flooding scope.";
          }
        }
        case area {
          leaf area {
            type ospf-area-id;
            description
            "Enable the Router Information functionality with Area flooding scope.";
          }
        }
      }
    }
  }

  grouping metric-common-group {
    leaf metric {
      type uint32 {
        range "0..16777214";
      }
      description
        "OSPF default metric.";
    }

    leaf metric-type {
      type enumeration {
        enum "type-1" {
          value 1;
        }
        enum "type-2" {
          value 2;
        }
      }
      description
        "Metric type (1/2).";
    }

    leaf route-map {
      type frr-route-map:route-map-ref;
      description
        "Route map reference.";
    }
  }

  grouping default-info-group {
    container default-information {
      leaf originate {
        type boolean;
        description
          "Advertise a default route";
      }

      leaf always {
        type boolean;
        description
          "Always advertise default route.";
      }

      uses metric-common-group;
    }
  }

  grouping redistribute-group {
    list redistribute {
      key "protocol";
      leaf protocol {
        type frr-route-types:frr-route-types-v4;
        description
          "Protocol.";
      }

      uses metric-common-group;
    }
  }

  grouping distance-group {
    container distance {
      leaf admin-value {
        type uint8 {
          range "1..255";
        }
        description
          "Admin value.";
      }

      container ospf {
        leaf external {
          type uint8 {
            range "1..255";
          }
          description
            "Distance for external routes.";
        }

        leaf inter-area {
          type uint8 {
            range "1..255";
          }
          description
            "Distance for inter-area routes.";
        }

        leaf intra-area {
          type uint8 {
            range "1..255";
          }
          description
            "Distance for intra-area routes.";
        }
      }
    }
  }

  grouping distribute-list-group {
    container distribute-list {
      list dlist {
        key "name protocol";
        leaf name {
          type string;
          description
            "Filter networks in routing updates.";
        }

        leaf protocol {
          type frr-route-types:frr-route-types-v4;
          description
            "Out protocol.";
        }
      }
    }
  }

  grouping max-metric-group {
    container max-metric {
      container router-lsa {
        description
          "Advertise own Router-LSA with infinite distance (stub router).";
        leaf administrative {
          type boolean;
          description
            "Administratively applied, for an indefinite period.";
        }

        leaf on-shutdown {
          type uint8 {
            range "5..100";
          }
          description
            "Advertise stub-router prior to full shutdown of OSPF.";
        }

        leaf on-startup {
          type uint32 {
            range "5..86400";
          }
          description
            "Automatically advertise stub Router-LSA on startup of OSPF.";
        }
      }
    }
  }

  grouping mpls-te-group {
    container mpls-te {
      leaf on {
        type boolean;
        description
          "Enable the MPLS-TE functionality.";
      }

      leaf router-address {
        type inet:ipv4-address;
        description
          "Stable IP address of the advertising router.";
      }

      container inter-as {
        leaf as {
          type boolean;
          description
            "AS native mode self originate INTER-AS LSA with Type 11 (as flooding scope).";
        }

        leaf area {
          type ospf-area-id;
          description
            "AREA native mode self originate INTER-AS LSA with Type 10 (area flooding scope).";
        }
      }
    }
  }

  grouping ospf-group {
    container ospf {
      leaf abr-type {
        type enumeration {
          enum "cisco" {
            value 1;
            description
              "Alternative ABR, Cisco implementation.";
          }
          enum "ibm" {
            value 2;
            description
              "Alternative ABR,  IBM implementation.";
          }
          enum "shortcut" {
            value 3;
            description
              "Shortcut ABR.";
          }
          enum "standard" {
            value 4;
            description
              "Standard behavior (RFC2328).";
          }
        }
      }

      leaf opaque-lsa {
        type boolean;
        description
          "Enable the Opaque-LSA capability (RFC2370)";
      }

      leaf rfc1583compatibility {
        type boolean;
        description
          "Enable the RFC 1583 compatibility flag.";
      }

      leaf router-id {
        type inet:ipv4-address;
        description
          "Router-id for the OSPF process.";
      }

      leaf write-multiplier {
        type uint8 {
          range "1..100";
        }
        description
          "Write multiplier.";
      }
    }
  }

  grouping timer-group {
    container timers {
      leaf refresh-interval {
        type uint16 {
          range "10..1800";
        }
        units "seconds";
        description
          "The maximum time between distinct originations of any particular
           LSA, value in units seconds.";
      }

      leaf lsa-min-arrival {
        type uint32 {
          range "0..600000";
        }
        units "milliseconds";
        description
          "Minimum delay in receiving new version of an LSA.";
      }

      container throttle {
        leaf lsa-all {
          type uint16 {
            range "0..5000";
          }
          units "milliseconds";
          description
            "LSA delay between transmissions.";
        }

        leaf spf {
          type uint32 {
            range "0..600000";
          }
          units "milliseconds";
          description
            "Delay from first change received till SPF calculation.";
        }
      }
    }
  }

  grouping segment-routing-group {
    container segment-routing {
      container global-block {
        description
          "Segment Routing Global Block label range.";
        leaf lower-bound {
          must "../upper-bound > .";
          type uint32 {
            range "0..1048575";
          }
          default "16000";
        }

        leaf upper-bound {
          must ". > ../lower-bound";
          type uint32 {
            range "0..1048575";
          }
          default "23999";
        }
      }

      container srlb {
        description
          "Local blocks to be advertised.";
        leaf lower-bound {
          must "../upper-bound > .";
          type uint32;
          default "15000";
          description
            "Lower value in the label range.";
        }
        leaf upper-bound {
          must ". > ../lower-bound";
          type uint32;
          default "15999";
          description
            "Upper value in the label range.";
        }
      }

      leaf node-msd {
        type uint8 {
          range "1..16";
        }
        description
          "Maximum Stack Depth for this router.";
      }

      leaf on {
        type boolean;
        description
          "Enable Segment Routing.";
      }

      list prefix-sid {
        key "index";
        leaf index {
          type uint16;
          description
            "SID index for this prefix.";
        }

        leaf prefix {
          type inet:ipv4-prefix;
          description
            "Prefix SID.";
        }

        leaf last-hop-behavior {
          type enumeration {
            enum "explicit-null" {
              value 0;
              description
                "Use explicit-null for the SID.";
            }
            enum "no-php" {
              value 1;
              description
                "Do not use Penultimate Hop Popping (PHP)
                   for the SID.";
             }
             enum "php" {
               value 2;
               description
                 "Use PHP for the SID.";
             }
           }
           default "php";
             description
               "Configure last hop behavior.";
        }
      }
    }
  }

  grouping ospf-list-group {
    list neighbor {
      key "ip";
      description
        "Neighbor list.";
      leaf ip {
        type inet:ipv4-address;
        description
          "Neighbor IP address.";
      }

      leaf priority {
        type uint8;
        description
          "Neighbor Priority.";
      }

      leaf poll-interval {
        type uint16 {
          range "1..65535";
        }
        units "seconds";
        description
          "Dead Neighbor Polling interval.";
      }
    }

    list network {
      key "prefix";
      description
        "Enable routing on list of IP network.";
      leaf prefix {
        type inet:ipv4-prefix;
        description
          "Prefix on which routing needs to be enabled.";
      }

      leaf area {
        type ospf-area-id;
        description
          "Area ID for this network.";
      }
    }

    list passive-interface {
      key "interface";
      description
        "Suppress routing updates on list interface.";
      leaf interface {
        type frr-interface:interface-ref;
        description
          "Suppress routing updates on an interface.";
      }

      leaf address {
        type inet:ipv4-address;
        description
          "Interface address.";
      }
    }
  }

  grouping interface-ospf-attribute-group {
    leaf area {
      type ospf-area-id;
      description
        "OSPF area ID.";
    }

    uses authentication-group;

    leaf cost {
      type uint16 {
        range "1..65535";
      }
      description
        "Interface cost";
    }

    container dead-interval {
      leaf interval {
        type uint16 {
          range "1..65535";
        }
        units "seconds";
      }

      container minimal {
        leaf hello-multiplier {
          type uint8 {
            range "1..10";
          }
        }
      }
    }

    leaf hello-interval {
      type uint16 {
        range "1..65535";
      }
      units "seconds";
      description
        "Time between HELLO packets.";
    }

    leaf retransmit-interval {
      type uint16 {
        range "1..65535";
      }
      units "seconds";
      description
        "Time between retransmitting lost link state advertisements.";
    }

    leaf transmit-delay {
      type uint16 {
        range "1..65535";
      }
      units "seconds";
      description
        "Link state transmit delay.";
    }

    leaf mtu-ignore {
      type boolean;
      description
        "Disable MTU mismatch detection on this interface.";
    }

    leaf priority {
      type uint8;
      description
        "Router priority.";
    }
  }

  grouping interface-ospf-group {
    list instance {
      key "id";
      leaf id {
        type uint16;
        description
          "OSPF instance ID.";
      }

      leaf bfd {
        type boolean;
        default "false";
        description
          "BFD support.";
      }

      leaf network {
        type enumeration {
          enum "broadcast" {
            value 1;
          }
          enum "non-broadcast" {
            value 2;
          }
          enum "point-to-multipoint" {
            value 3;
          }
          enum "point-to-point" {
            value 4;
          }
        }
      }

      uses interface-ospf-attribute-group;

      list interface-address {
        key "address";
        leaf address {
          type inet:ipv4-address;
          description
            "Address of interface";
        }

        uses interface-ospf-attribute-group;
      }
    }
  }

  augment "/frr-rt:routing/frr-rt:control-plane-protocols/frr-rt:control-plane-protocol" {
    container ospf {
      when "../frr-rt:type = 'frr-ospfd:ospf'" {
        description
          "This container is only valid for the 'OSPF' routing
           protocol.";
      }

      uses route-ospf-leaf-attributes;

      uses default-info-group;

      uses redistribute-group;

      uses distance-group;

      uses distribute-list-group;

      uses max-metric-group;

      uses mpls-te-group;

      uses ospf-group;

      uses timer-group;

      uses segment-routing-group;

      uses ospf-list-group;

      uses area-groupings;
    }
  }

  /*
   * Per-interface configuration data
   */
  augment "/frr-interface:lib/frr-interface:interface" {
    container ospf {
      description
        "OSPF interface parameters.";
      uses interface-ospf-group;
    }
  }
}