submodule bbf-xpon-base {

    yang-version 1.1;

    belongs-to bbf-xpon {
        prefix bbf-xpon;
    }

    import ietf-interfaces {
      prefix if;
    }
    import ietf-inet-types {
      prefix inet;
    }
    import bbf-xpon-types {
      prefix bbf-xpon-types;
    }
    import bbf-xpon-if-type {
      prefix bbf-xponift;
    }
    import bbf-yang-types {
      prefix bbf-yang;
    }

    organization
      "Broadband Forum <https://www.broadband-forum.org>
     Fiber Access Networks Work Area";

    contact
      "Comments or questions about this Broadband Forum YANG module
     should be directed to <mailto:info@broadband-forum.org>.

     Editor:      Robert Peschi, Nokia

     Editor:      Kevin Noll, Vecima

     PS Leader:   Joey Boyd, Adtran

     WA Director: Marta Seda, Calix";

    description
      "This submodule contains a collection of YANG definitions and
     augmentations to ietf-interfaces for managing the xPON
     infrastructure.

     Copyright (c) 2018-2023, Broadband Forum

     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.

     3. Neither the name of the copyright holder nor the names of its
        contributors may be used to endorse or promote products
        derived from this software without specific prior written
        permission.

     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.

     The above license is used as a license under copyright only.
     Please reference the Forum IPR Policy for patent licensing terms
     <https://www.broadband-forum.org/ipr-policy>.

     Any moral rights which are necessary to exercise under the above
     license grant are also deemed granted under this license.

     This version of this YANG module is part of TR-385i2a1; see
     the TR itself for full legal notices.";

    revision "2023-06-21" {
      description
        "Issue 2 Amendment 1.
       * Approval Date:    2023-06-21.
       * Publication Date: 2023-06-21.";
      reference
        "TR-385i2a1: ITU-T PON YANG Modules
        	<https://www.broadband-forum.org/technical/download/
        		 TR-385_Issue-2_Amendment-1.pdf>";

    }

    revision "2020-10-13" {
      description
        "Issue 2.
       * Approval Date:    2020-10-13.
       * Publication Date: 2020-10-13.";
      reference
        "TR-385i2: ITU-T PON YANG Modules
        	<https://www.broadband-forum.org/technical/download/
        		 TR-385_Issue-2.pdf>";

    }

    revision "2019-02-25" {
      description
        "Initial revision.
       * Approval Date:    2019-02-25.
       * Publication Date: 2019-02-25.";
      reference
        "TR-385: ITU-T PON YANG Modules
        	<https://www.broadband-forum.org/technical/download/
        		 TR-385.pdf>";

    }


    feature ictp-support {
      description
        "Indicates that the Optical Line Termination (OLT) supports
       Inter Channel Termination Protocol (ICTP).";
    }

    feature configurable-ictp-proxy-tcp-port {
      if-feature ictp-support;
      description
        "Indicates support for the configuration of the TCP port
       used by an Inter Channel Termination Protocol (ICTP) proxy.";
    }

    container xpon {
      description
        "Configuration associated with managing xPON in a system.";
      container ictp {
        if-feature ictp-support;
        description
          "Configuration data for the support of Inter Channel
         Termination Protocol (ICTP).";
        reference
          "BBF TR-352";

        leaf activated {
          type boolean;
          default "false";
          description
            "This is to enable or disable support of Inter Channel
           Termination Protocol (ICTP). When true, the Optical Line
           Termination (OLT) attempts to establish Transmission
           Control Protocol (TCP) connections with all relevant peer
           ICTP proxies and is ready to exchange ICTP messages with
           other channel terminations through those ICTP proxies. When
           false, the OLT does not process nor generate any ICTP
           messages and will not establish nor maintain any TCP
           connection to any ICTP proxy.";
        }

        container all-ictp-proxies-all-channel-groups {
          description
            "This container contains all configuration data related to
           TR-352 Inter Channel Termination Protocol (ICTP) transport
           infrastructure for all ICTP proxies, whether they are in
           charge of 'inside-olt' channel terminations or
           'outside-olt' channel terminations, for all channel
           groups.";
          list proxy {
            key "name";
            description
              "The list of all Inter Channel Termination Protocol (ICTP)
             proxies, whether they are in charge of 'inside-olt'
             channel terminations or 'outside-olt' channel
             terminations, for all channel groups configured in the
             Optical Line Termination (OLT).";
            leaf name {
              type bbf-yang:string-ascii64;
              description
                "Name of the Inter Channel Termination Protocol (ICTP)
               Proxy.";
            }

            leaf host {
              type inet:host;
              mandatory true;
              description
                "This is the IP address or the DNS domain name of the
               Inter Channel Termination Protocol (ICTP) proxy. TCP
               connections originating from this ICTP proxy will use
               this IP address (or the one resolved from the DNS
               domain name) as source IP address. Other ICTP proxies
               will reach this Proxy using this IP address (or the one
               resolved from the DNS domain name) as destination
               address.";
            }

            leaf tcp-port {
              if-feature configurable-ictp-proxy-tcp-port;
              type inet:port-number;
              default "7202";
              description
                "The TCP port used by the Inter Channel Termination
               Protocol (ICTP) proxy.";
            }

            container all-channel-terminations-proxied-by-this-proxy {
              description
                "In the context of a given Inter Channel Termination
               Protocol (ICTP) proxy, this container contains the list
               of all channel terminations 'inside' and 'outside' the
               Optical Line Termination (OLT), for all channel groups,
               for which this ICTP proxy is playing proxy role.";
              list channel-termination {
                key "channel-termination-ref";
                description
                  "The list of all channel terminations inside and
                 outside the Optical Line Termination (OLT), for all
                 channel groups, for which this Inter Channel
                 Termination Protocol (ICTP) proxy is playing proxy
                 role.";
                leaf channel-termination-ref {
                  type if:interface-ref;
                  must
                    "derived-from-or-self(/if:interfaces"
                      + "/if:interface[if:name=current()]/if:type,"
                      + "'bbf-xponift:channel-termination')" {
                    error-message
                      "Must reference a channel termination.";
                  }
                  description
                    "Reference to a channel termination for which this
                   Inter Channel Termination Protocol (ICTP) proxy is
                   responsible.";
                }

                leaf channel-termination-ictp-activated {
                  type boolean;
                  default "false";
                  description
                    "When true, the Inter Channel Termination Protocol
                   (ICTP) proxy is willing to exchange ICTP messages
                   on behalf of this channel termination. When false,
                   the ICTP proxy ignores this channel termination.";
                }
              }  // list channel-termination
            }  // container all-channel-terminations-proxied-by-this-proxy
          }  // list proxy
        }  // container all-ictp-proxies-all-channel-groups
      }  // container ictp
    }  // container xpon

    container xpon-state {
      config false;
      description
        "State data associated with managing xPON in a system.";
      container ictp {
        if-feature ictp-support;
        description
          "State data for the support of Inter Channel Termination
         Protocol (ICTP).";
        reference
          "BBF TR-352";

        container all-ictp-proxies-all-channel-groups {
          description
            "State data related to all Inter Channel Termination
           Protocol (ICTP) proxies across all channel groups.";
          list proxy {
            key "name";
            description
              "The list of all Inter Channel Termination Protocol (ICTP)
             proxies for all channel-groups.";
            leaf name {
              type bbf-yang:string-ascii64;
              description
                "Name of the Inter Channel Termination Protocol (ICTP)
               Proxy.";
            }

            leaf proxy-ip-address {
              type bbf-xpon-types:ip-address-or-unresolved;
              description
                "This is the IP address (v4 or v6) of this Inter Channel
               Termination Protocol (ICTP) proxy as derived from its
               configured host and as used in the TCP connection when
               established. It is 'unresolved' if for some reason the
               system is unable to deduce the IP address from the host
               name of the ICTP proxy.";
            }

            leaf negotiated-ictp-version {
              type union {
                type enumeration {
                  enum "unknown" {
                    value 0;
                    description
                      "The proxy is unable to negotiate an Inter Channel
                     Termination Protocol (ICTP) version.";
                  }
                }
                type uint8 {
                  range "1..max";
                }
              }
              description
                "This leaf reflects the negotiated Inter Channel
               Termination Protocol (ICTP) version of the proxy.";
            }

            leaf-list supported-ictp-version {
              type uint8 {
                range "1..max";
              }
              description
                "This list of supported Inter Channel Termination
               Protocol (ICTP) versions of a proxy.";
            }

            container known-peered-proxies {
              description
                "In the context of an Inter Channel Termination Protocol
               (ICTP) proxy, this container contains state data about
               peering relations involving this ICTP proxy. An Optical
               Line Termination (OLT) must know at least all peering
               relations involving the ICTP proxies in charge of one
               or several channel terminations 'inside' the OLT.
               An OLT may or may not know peering relations between
               ICTP proxies exclusively involving channel terminations
               'outside' the OLT.";
              list proxy {
                key "name";
                description
                  "In the context of an Inter Channel Termination
                 Protocol (ICTP) proxy, the list of all ICTP proxies
                 which the Optical Line Termination (OLT) knows to be
                 peered with this ICTP proxy.";
                leaf name {
                  type bbf-yang:string-ascii64;
                  description
                    "Name of this Inter Channel Termination Protocol
                   (ICTP) peer proxy.";
                }

                leaf ip-address {
                  type bbf-xpon-types:ip-address-or-unresolved;
                  description
                    "This is the IP address (v4 or v6) of the peer
                   Inter Channel Termination Protocol (ICTP) proxy as
                   derived from its configured host and as used in the
                   TCP connection when established. It is 'unresolved'
                   if for some reason the system is unable to deduce
                   the IP address from the host name of the ICTP
                   proxy.";
                }

                leaf tcp-connection-state {
                  type identityref {
                    base bbf-xpon-types:tcp-connection-state-base;
                  }
                  description
                    "This leaf reflects the state of the Transmission
                   Control Protocol (TCP) connection with this peer
                   Inter Channel Termination Protocol (ICTP) Proxy.
                   When 'established' the TCP connection is
                   operational and able to transport ICTP messages.
                   When 'not-established', the TCP connection is
                   unable to exchange any ICTP message. When the TCP
                   connection state is 'unknown' the Optical Line
                   Termination (OLT) does not know whether the
                   involved ICTP proxies can exchange ICTP messages or
                   not; typically, this is because the OLT is not
                   involved at all with either of the two related ICTP
                   proxies.";
                }

                leaf source-tcp-port {
                  type inet:port-number;
                  description
                    "This is the source port number of the Transmission
                   Control Protocol (TCP) connection with the peer
                   Inter Channel Termination Protocol (ICTP) proxy,
                   when established.";
                }

                leaf destination-tcp-port {
                  type inet:port-number;
                  description
                    "This is the destination port number of the
                   Transmission Control Protocol (TCP) connection with
                   the peer Inter Channel Termination Protocol (ICTP)
                   proxy, when established.";
                }
              }  // list proxy
            }  // container known-peered-proxies
          }  // list proxy
        }  // container all-ictp-proxies-all-channel-groups
      }  // container ictp
    }  // container xpon-state

    augment /if:interfaces/if:interface {
      when
        "if:type = 'bbf-xponift:channel-group'";
      description
        "Augment interface configuration with xPON channel group
       configuration.";
      container channel-group {
        description
          "Channel group configuration data for all xPON variants
         (NG-PON2, XGS-PON, XG-PON and G-PON).";
      }  // container channel-group
    }

    augment /if:interfaces/if:interface {
      when
        "derived-from-or-self"
          + "(if:type, 'bbf-xponift:channel-partition')";
      description
        "Augment interface configuration with xPON channel partition
       configuration.";
      container channel-partition {
        description
          "Channel partition configuration data for all xPON variants
         (NG-PON2, XGS-PON, XG-PON and G-PON).";
      }  // container channel-partition
    }

    augment /if:interfaces/if:interface {
      when
        "derived-from-or-self"
          + "(if:type, 'bbf-xponift:channel-pair')";
      description
        "Augment interface configuration with xPON channel pair
       configuration.";
      container channel-pair {
        description
          "Channel pair configuration data for all xPON variants
         (NG-PON2, XGS-PON, XG-PON and G-PON).";
      }  // container channel-pair
    }

    augment /if:interfaces/if:interface {
      when
        "derived-from-or-self"
          + "(if:type, 'bbf-xponift:channel-termination')";
      description
        "Augment interface configuration with xPON channel termination
       configuration.";
      container channel-termination {
        description
          "Channel termination configuration data for all xPON variants
         (NG-PON2, XGS-PON, XG-PON and G-PON).";
      }  // container channel-termination
    }

    augment /if:interfaces-state/if:interface {
      when
        "derived-from-or-self"
          + "(if:type, 'bbf-xponift:channel-group')";
      description
        "Augment interface state data with xPON channel group
       state data.";
      container channel-group {
        description
          "Channel group state data for all xPON variants
         (NG-PON2, XGS-PON, XG-PON and G-PON).";
      }  // container channel-group
    }

    augment /if:interfaces-state/if:interface {
      when
        "derived-from-or-self"
          + "(if:type, 'bbf-xponift:channel-pair')";
      description
        "Augment interface state data with xPON channel pair
       state data.";
      container channel-pair {
        description
          "Channel pair state data for all xPON variants
         (NG-PON2, XGS-PON, XG-PON and G-PON).";
      }  // container channel-pair
    }

    augment /if:interfaces-state/if:interface {
      when
        "derived-from-or-self"
          + "(if:type, 'bbf-xponift:channel-termination')";
      description
        "Augment interface state data with xPON channel termination
       state data.";
      container channel-termination {
        description
          "Channel termination state data for all xPON variants
         (NG-PON2, XGS-PON, XG-PON and G-PON).";
      }  // container channel-termination
    }
  }  // submodule bbf-xpon-base