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

  import ietf-inet-types {
    prefix inet;
  }
  import frr-filter {
    prefix filter;
  }
  import frr-interface {
    prefix frr-interface;
  }

  organization "FRRouting";
  contact
    "FRR Users List:       <mailto:frog@lists.frrouting.org>
     FRR Development List: <mailto:dev@lists.frrouting.org>";
  description "This module defines route map settings";

  revision 2019-07-01 {
    description "Initial revision";
  }

  /*
   * Types.
   */
  typedef route-map-sequence {
    description "Route map valid sequence numbers";
    type uint16 {
      range "1..65535";
    }
  }

  typedef route-map-name {
    description "Route map name format";
    type string;
  }

  /*
   * Operational data.
   */
  container lib {
    list route-map {
      description "Route map instance";

      key "name";

      leaf name {
        description "Route map instance name";
        type route-map-name;
      }

      list entry {
        description "Route map entry";

        key "sequence";

        leaf sequence {
          description
            "Route map instance priority (low number means higher priority)";
          type route-map-sequence;
        }

        leaf description {
          description "Route map description";
          type string;
        }

        leaf action {
          description
            "Route map actions: permit (executes action), deny (quits evaluation)";
          mandatory true;
          type enumeration {
            enum permit {
              description
                "Executes configured action and permits the prefix/route
                 if the conditions matched. An alternative exit action can
                 be configured to continue processing the route map list
                 or jump to process another route map.";
              value 0;
            }
            enum deny {
              description
                "If all conditions are met the prefix/route is denied and
                 route map processing stops.";
              value 1;
            }
          }
        }

        leaf call {
          description
            "Call another route map before calling `exit-policy`. If the
             called route map returns deny then this route map will also
             return deny";
          type route-map-name;
        }

        leaf exit-policy {
          description "What do to after route map successful match, set and call";
          type enumeration {
            enum permit-or-deny {
              description "End route map evaluation and return";
              value 0;
            }
            enum next {
              description
                "Proceed evaluating next route map entry per sequence";
              value 1;
            }
            enum goto {
              description
                "Go to route map entry with the provided sequence number";
              value 2;
            }
          }
          default "permit-or-deny";
        }

        leaf goto-value {
          when "../exit-policy = 'goto'";
          description
            "Sequence number to jump (when using `goto` exit policy)";
          mandatory true;
          type route-map-sequence;
        }

        list match-condition {
          description "Route map match conditions";

          key "condition";

          leaf condition {
            description "Match condition";
            type enumeration {
              enum interface {
                description "Match interface";
                value 0;
              }
              enum ipv4-address-list {
                description "Match an IPv4 access-list";
                value 1;
              }
              enum ipv4-prefix-list {
                description "Match an IPv4 prefix-list";
                value 2;
              }
              enum ipv4-next-hop-list {
                description "Match an IPv4 next-hop";
                value 3;
              }
              enum ipv4-next-hop-prefix-list {
                description "Match an IPv4 next-hop prefix list";
                value 4;
              }
              enum ipv4-next-hop-type {
                description "Match an IPv4 next-hop type";
                value 5;
              }
              enum ipv6-address-list {
                description "Match an IPv6 access-list";
                value 6;
              }
              enum ipv6-prefix-list {
                description "Match an IPv6 prefix-list";
                value 7;
              }
              enum ipv6-next-hop-type {
                description "Match an IPv6 next-hop type";
                value 8;
              }
              enum metric {
                description "Match a route metric";
                value 9;
              }
              enum tag {
                description "Match a route tag";
                value 10;
              }

              /*
               * Protocol YANG models should augment the parent node to
               * contain the routing protocol specific value. The protocol
               * must also augment `condition-value` to include its specific
               * values or expand the `when` statement on the existing cases.
               */
              enum routing-protocol-specific {
                description "Match a routing protocol specific type";
                value 100;
              }
            }
          }

          choice condition-value {
            description
              "Value to match (interpretation depends on condition type)";
            mandatory true;
            case interface {
              when "./condition = 'interface'";
              leaf interface {
                type frr-interface:interface-ref;
              }
            }
            case access-list-num {
              when "./condition = 'ipv4-address-list' or
                    ./condition = 'ipv4-next-hop-list'";
              leaf access-list-num {
                type filter:access-list-standard;
              }
            }
            case access-list-num-extended {
              when "./condition = 'ipv4-address-list' or
                    ./condition = 'ipv4-next-hop-list'";
              leaf access-list-num-extended {
                type filter:access-list-extended;
              }
            }
            case list-name {
              when "./condition = 'ipv4-address-list' or
                    ./condition = 'ipv4-prefix-list' or
                    ./condition = 'ipv4-next-hop-list' or
                    ./condition = 'ipv4-next-hop-prefix-list' or
                    ./condition = 'ipv6-address-list' or
                    ./condition = 'ipv6-prefix-list'";
              leaf list-name {
                type filter:access-list-name;
              }
            }
            case ipv4-next-hop-type {
              when "./condition = 'ipv4-next-hop-type'";
              leaf ipv4-next-hop-type {
                type enumeration {
                  enum blackhole {
                    value 0;
                  }
                }
              }
            }
            case ipv6-next-hop-type {
              when "./condition = 'ipv6-next-hop-type'";
              leaf ipv6-next-hop-type {
                type enumeration {
                  enum blackhole {
                    value 0;
                  }
                }
              }
            }
            case metric {
              when "./condition = 'metric'";
              leaf metric {
                type uint32 {
                  range "1..4294967295";
                }
              }
            }
            case tag {
              when "./condition = 'tag'";
              leaf tag {
                type uint32 {
                  range "1..4294967295";
                }
              }
            }
          }
        }

        list set-action {
          description "Route map set actions";

          key "action";

          leaf action {
            description "Action to do when the route map matches";
            type enumeration {
              enum ipv4-next-hop {
                description "Set IPv4 address of the next hop";
                value 0;
              }
              enum ipv6-next-hop {
                description "Set IPv6 address of the next hop";
                value 1;
              }
              enum metric {
                description "Set prefix/route metric";
                value 2;
              }
              enum tag {
                description "Set tag";
                value 3;
              }

              /*
               * Protocol YANG models should augment the parent node to
               * contain the routing protocol specific value. The protocol
               * must also augment `action-value` to include its specific
               * values or expand the `when` statement on the existing cases.
               */
              enum routing-protocol-specific {
                description "Set a routing protocol specific action";
                value 100;
              }
            }
          }

          choice action-value {
            description
              "Value to set (interpretation depends on action-type)";
            case ipv4-address {
              when "./action = 'ipv4-next-hop'";
              leaf ipv4-address {
                description "IPv4 address";
                type inet:ipv4-address;
              }
            }
            case ipv6-address {
              when "./action = 'ipv6-next-hop'";
              leaf ipv6-address {
                description "IPv6 address";
                type inet:ipv6-address;
              }
            }
            case metric {
              when "./action = 'metric'";
              choice metric-value {
                description "Metric to set or use";
                case value {
                  leaf value {
                    description "Use the following metric value";
                    type uint32 {
                      range "0..4294967295";
                    }
                  }
                }
                case add-metric {
                  leaf add-metric {
                    description "Add unit to metric";
                    type boolean;
                  }
                }
                case subtract-metric {
                  leaf subtract-metric {
                    description "Subtract unit from metric";
                    type boolean;
                  }
                }
                case use-round-trip-time {
                  leaf use-round-trip-time {
                    description "Use the round trip time as metric";
                    type boolean;
                  }
                }
                case add-round-trip-time {
                  leaf add-round-trip-time {
                    description "Add round trip time to metric";
                    type boolean;
                  }
                }
                case subtract-round-trip-time {
                  leaf subtract-round-trip-time {
                    description "Subtract round trip time to metric";
                    type boolean;
                  }
                }
              }
            }
            case tag {
              when "./action = 'tag'";
              leaf tag {
                description "Tag value";
                type uint32 {
                  range "0..4294967295";
                }
              }
            }
          }
        }
      }
    }
  }
}