module ietf-ipv4-unicast-routing {

    yang-version 1.1;

    namespace
      "urn:ietf:params:xml:ns:yang:ietf-ipv4-unicast-routing";

    prefix v4ur;

    import ietf-routing {
      prefix rt;
    }
    import ietf-inet-types {
      prefix inet;
    }

    organization
      "IETF NETMOD (NETCONF Data Modeling Language) Working Group";

    contact
      "WG Web:   <https://datatracker.ietf.org/wg/netmod/>
     WG List:  <mailto:netmod@ietf.org>

     WG Chair: Lou Berger
               <mailto:lberger@labn.net>

     WG Chair: Kent Watsen
               <mailto:kwatsen@juniper.net>

     Editor:   Ladislav Lhotka
               <mailto:lhotka@nic.cz>

     Editor:   Acee Lindem
               <mailto:acee@cisco.com>";

    description
      "This YANG module augments the 'ietf-routing' module with basic
     configuration and state data for IPv4 unicast routing.

     Copyright (c) 2016 IETF Trust and the persons identified as
     authors of the code.  All rights reserved.

     Redistribution and use in source and binary forms, with or
     without modification, is permitted pursuant to, and subject to
     the license terms contained in, the Simplified BSD License set
     forth in Section 4.c of the IETF Trust's Legal Provisions
     Relating to IETF Documents
     (http://trustee.ietf.org/license-info).

     The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
     NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'MAY', and
     'OPTIONAL' in the module text are to be interpreted as described
     in RFC 2119.

     This version of this YANG module is part of RFC 8022;
     see the RFC itself for full legal notices.";

    revision "2016-11-04" {
      description "Initial revision.";
      reference
        "RFC 8022: A YANG Data Model for Routing Management";

    }


    identity ipv4-unicast {
      base rt:ipv4;
      description
        "This identity represents the IPv4 unicast address family.";
    }

    augment /rt:routing-state/rt:ribs/rt:rib/rt:routes/rt:route {
      when
        "derived-from-or-self(../../rt:address-family, "
          + "'v4ur:ipv4-unicast')" {
        description
          "This augment is valid only for IPv4 unicast.";
      }
      description
        "This leaf augments an IPv4 unicast route.";
      leaf destination-prefix {
        type inet:ipv4-prefix;
        description
          "IPv4 destination prefix.";
      }
    }

    augment /rt:routing-state/rt:ribs/rt:rib/rt:routes/rt:route/rt:next-hop/rt:next-hop-options/rt:simple-next-hop {
      when
        "derived-from-or-self(../../../rt:address-family, "
          + "'v4ur:ipv4-unicast')" {
        description
          "This augment is valid only for IPv4 unicast.";
      }
      description
        "Augment 'simple-next-hop' case in IPv4 unicast routes.";
      leaf next-hop-address {
        type inet:ipv4-address;
        description
          "IPv4 address of the next hop.";
      }
    }

    augment /rt:routing-state/rt:ribs/rt:rib/rt:routes/rt:route/rt:next-hop/rt:next-hop-options/rt:next-hop-list/rt:next-hop-list/rt:next-hop {
      when
        "derived-from-or-self(../../../../../rt:address-family, "
          + "'v4ur:ipv4-unicast')" {
        description
          "This augment is valid only for IPv4 unicast.";
      }
      description
        "This leaf augments the 'next-hop-list' case of IPv4 unicast
       routes.";
      leaf address {
        type inet:ipv4-address;
        description
          "IPv4 address of the next-hop.";
      }
    }

    augment /rt:routing-state/rt:ribs/rt:rib/rt:active-route/rt:input {
      when
        "derived-from-or-self(../rt:address-family, "
          + "'v4ur:ipv4-unicast')" {
        description
          "This augment is valid only for IPv4 unicast RIBs.";
      }
      description
        "This augment adds the input parameter of the 'active-route'
       action.";
      leaf destination-address {
        type inet:ipv4-address;
        description
          "IPv4 destination address.";
      }
    }

    augment /rt:routing-state/rt:ribs/rt:rib/rt:active-route/rt:output/rt:route {
      when
        "derived-from-or-self(../../rt:address-family, "
          + "'v4ur:ipv4-unicast')" {
        description
          "This augment is valid only for IPv4 unicast.";
      }
      description
        "This augment adds the destination prefix to the reply of the
       'active-route' action.";
      leaf destination-prefix {
        type inet:ipv4-prefix;
        description
          "IPv4 destination prefix.";
      }
    }

    augment /rt:routing-state/rt:ribs/rt:rib/rt:active-route/rt:output/rt:route/rt:next-hop/rt:next-hop-options/rt:simple-next-hop {
      when
        "derived-from-or-self(../../../rt:address-family, "
          + "'v4ur:ipv4-unicast')" {
        description
          "This augment is valid only for IPv4 unicast.";
      }
      description
        "Augment 'simple-next-hop' case in the reply to the
       'active-route' action.";
      leaf next-hop-address {
        type inet:ipv4-address;
        description
          "IPv4 address of the next hop.";
      }
    }

    augment /rt:routing-state/rt:ribs/rt:rib/rt:active-route/rt:output/rt:route/rt:next-hop/rt:next-hop-options/rt:next-hop-list/rt:next-hop-list/rt:next-hop {
      when
        "derived-from-or-self(../../../../../rt:address-family, "
          + "'v4ur:ipv4-unicast')" {
        description
          "This augment is valid only for IPv4 unicast.";
      }
      description
        "Augment 'next-hop-list' case in the reply to the
       'active-route' action.";
      leaf next-hop-address {
        type inet:ipv4-address;
        description
          "IPv4 address of the next hop.";
      }
    }

    augment /rt:routing/rt:control-plane-protocols/rt:control-plane-protocol/rt:static-routes {
      description
        "This augment defines the configuration of the 'static'
       pseudo-protocol with data specific to IPv4 unicast.";
      container ipv4 {
        description
          "Configuration of a 'static' pseudo-protocol instance
         consists of a list of routes.";
        list route {
          key "destination-prefix";
          description
            "A list of static routes.";
          leaf destination-prefix {
            type inet:ipv4-prefix;
            mandatory true;
            description
              "IPv4 destination prefix.";
          }

          leaf description {
            type string;
            description
              "Textual description of the route.";
          }

          container next-hop {
            description
              "Configuration of next-hop.";
            uses rt:next-hop-content {
              augment next-hop-options/simple-next-hop {
                description
                  "Augment 'simple-next-hop' case in IPv4 static
                 routes.";
                leaf next-hop-address {
                  type inet:ipv4-address;
                  description
                    "IPv4 address of the next hop.";
                }
              }

              augment next-hop-options/next-hop-list/next-hop-list/next-hop {
                description
                  "Augment 'next-hop-list' case in IPv4 static
                 routes.";
                leaf next-hop-address {
                  type inet:ipv4-address;
                  description
                    "IPv4 address of the next hop.";
                }
              }
            }
          }  // container next-hop
        }  // list route
      }  // container ipv4
    }
  }  // module ietf-ipv4-unicast-routing