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

  import ietf-inet-types {
    prefix inet;
  }
  import ietf-yang-types {
    prefix yang;
  }
  import frr-interface {
    prefix frr-interface;
  }
  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 ripngd daemon.

     Copyright 2020 FRRouting

     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.

     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.";

  revision 2019-09-09 {
    description
      "Changed interface references to use
      frr-interface:interface-ref typedef";
  }
  revision 2018-11-27 {
    description
      "Initial revision.";
    reference
      "RFC 2080: RIPng for IPv6.";
  }

  container ripngd {
    /*
     * Routing instance configuration.
     */
    list instance {
      key "vrf";
      description
        "RIPng routing instance.";

      leaf vrf {
        type string;
        description
          "VRF name.";
      }
      leaf allow-ecmp {
        type boolean;
        default "false";
        description
          "Allow equal-cost multi-path.";
      }
      leaf default-information-originate {
        type boolean;
        default "false";
        description
          "Control distribution of default route.";
      }
      leaf default-metric {
        type uint8 {
          range "1..16";
        }
        default "1";
        description
          "Default metric of redistributed routes.";
      }
      leaf-list network {
        type inet:ipv6-prefix;
        description
          "Enable RIPng on the specified IPv6 network.";
      }
      leaf-list interface {
        type frr-interface:interface-ref;
        description
          "Enable RIPng on the specified interface.";
      }
      list offset-list {
        key "interface direction";
        description
          "Offset-list to modify route metric.";
        leaf interface {
          type union {
            type frr-interface:interface-ref;
            type enumeration {
              enum '*' {
                description
                  "Match all interfaces.";
              }
            }
          }
          description
            "Interface to match. Use '*' to match all interfaces.";
        }
        leaf direction {
          type enumeration {
            enum in {
              value 0;
              description
                "Incoming updates.";
            }
            enum out {
              value 1;
              description
                "Outgoing updates.";
            }
          }
          description
            "Incoming or outgoing updates.";
        }
        leaf access-list {
          type string;
          mandatory true;
          description
            "Access-list name.";
        }
        leaf metric {
          type uint8 {
            range "0..16";
          }
          mandatory true;
          description
            "Route metric.";
        }
      }
      leaf-list passive-interface {
        type frr-interface:interface-ref;
        description
          "A list of interfaces where the sending of RIPng packets
           is disabled.";
      }
      list redistribute {
        key "protocol";
        description
          "Redistributes routes learned from other routing protocols.";
        leaf protocol {
          type frr-route-types:frr-route-types-v6;
          description
            "Routing protocol.";
          must '. != "ripng"';
        }
        leaf route-map {
          type string {
            length "1..max";
          }
          description
            "Applies the conditions of the specified route-map to
             routes that are redistributed into the RIPng routing
             instance.";
        }
        leaf metric {
          type uint8 {
            range "0..16";
          }
          description
            "Metric used for the redistributed route. If a metric is
             not specified, the metric configured with the
             default-metric attribute in RIPng router configuration is
             used. If the default-metric attribute has not been
             configured, the default metric for redistributed routes
             is 0.";
        }
      }
      leaf-list static-route {
        type inet:ipv6-prefix;
        description
          "RIPng static routes.";
      }
      leaf-list aggregate-address {
        type inet:ipv6-prefix;
        description
          "RIPng aggregate route announcement.";
      }
      container timers {
        description
          "Settings of basic timers";
        leaf flush-interval {
          type uint16 {
            range "1..65535";
          }
          units "seconds";
          default "120";
          description
            "Interval before a route is flushed from the routing
             table.";
        }
        leaf holddown-interval {
          type uint16 {
            range "1..65535";
          }
          units "seconds";
          default "180";
          description
            "Interval before better routes are released.";
        }
        leaf update-interval {
          type uint16 {
            range "1..65535";
          }
          units "seconds";
          default "30";
          description
            "Interval at which RIPng updates are sent.";
        }
      }

      /*
       * Operational data.
       */
      container state {
        config false;
        description
          "Operational data.";

        container neighbors {
          description
            "Neighbor information.";
          list neighbor {
            key "address";
            description
              "A RIPng neighbor.";
            leaf address {
              type inet:ipv6-address;
              description
                "IPv6 address that a RIPng neighbor is using as its
                 source address.";
            }
            leaf last-update {
              type yang:date-and-time;
              description
                "The time when the most recent RIPng update was
                 received from this neighbor.";
            }
            leaf bad-packets-rcvd {
              type yang:counter32;
              description
                "The number of RIPng invalid packets received from
                 this neighbor which were subsequently discarded
                 for any reason (e.g. a version 0 packet, or an
                 unknown command type).";
            }
            leaf bad-routes-rcvd {
              type yang:counter32;
              description
                "The number of routes received from this neighbor,
                 in valid RIPng packets, which were ignored for any
                 reason (e.g. unknown address family, or invalid
                 metric).";
            }
          }
        }
        container routes {
          description
            "Route information.";
          list route {
            key "prefix";
            description
              "A RIPng IPv6 route.";
            leaf prefix {
              type inet:ipv6-prefix;
              description
                "IPv6 address and prefix length, in the format
                 specified in RFC6991.";
            }
            leaf next-hop {
              type inet:ipv6-address;
              description
                "Next hop IPv6 address.";
            }
            leaf interface {
              type string;
              description
                "The interface that the route uses.";
            }
            leaf metric {
              type uint8 {
                range "0..16";
              }
              description
                "Route metric.";
            }
          }
        }
      }
    }
  }

  /*
   * Per-interface configuration data
   */
  augment "/frr-interface:lib/frr-interface:interface" {
    container ripng {
      description
        "RIPng interface parameters.";
      leaf split-horizon {
        type enumeration {
          enum "disabled" {
            value 0;
            description
              "Disables split-horizon processing.";
          }
          enum "simple" {
            value 1;
            description
              "Enables simple split-horizon processing.";
          }
          enum "poison-reverse" {
            value 2;
            description
              "Enables split-horizon processing with poison
               reverse.";
          }
        }
        default "simple";
        description
          "Controls RIPng split-horizon processing on the specified
           interface.";
      }
    }
  }

  /*
   * RPCs
   */
  rpc clear-ripng-route {
    description
      "Clears RIPng routes from the IPv6 routing table and routes
       redistributed into the RIPng protocol.";

    input {
      leaf vrf {
        type string;
        description
          "VRF name identifying a specific RIPng instance.
           This leaf is optional for the rpc.
           If it is specified, the rpc will clear all routes in the
           specified RIPng instance;
           if it is not specified, the rpc will clear all routes in
           all RIPng instances.";
      }
    }
  }
}
