module bbf-vomci-proxy {

    yang-version 1.1;

    namespace "urn:bbf:yang:bbf-vomci-proxy";

    prefix bbf-vomci-proxy;

    import bbf-network-function-client {
      prefix bbf-nfc;
    }
    import bbf-network-function-server {
      prefix bbf-nfs;
    }
    import bbf-omci-message-retransmission {
      prefix bbf-omci-mr;
    }
    import bbf-vomci-common {
      prefix bbf-vomci-c;
    }
    import bbf-vomci-types {
      prefix bbf-vomcit;
    }
    import bbf-yang-types {
      prefix bbf-yang;
    }

    organization
      "Broadband Forum <https://www.broadband-forum.org>
SDN/NFV Work Area";

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

Editor:      Tim Carey, Nokia

Editor:      Jeff Hartley, Commscope

WA Director: Mengmeng Li, China Mobile

WA Director: Bruno Cornaglia, Vodafone";

    description
      "This module contains a collection of YANG definitions for
supporting the Broadband Forum requirements for vOMCI Proxy
functionality as described in TR-451.

Copyright (c) 2019-2022, 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-451; see
the TR itself for full legal notices.";

    revision "2022-06-07" {
      description
        "Issue 1.
* Approval Date:    2022-06-07.
* Publication Date: 2022-06-07.";
      reference
        "TR-451: vOMCI Specification
        	<https://www.broadband-forum.org/technical/download/
        		 TR-451_Issue-1.pdf>";

    }


    feature nf-client {
      description
        "Indicates that client connectivity to network function
endpoints is supported.";
    }

    feature nf-server {
      description
        "Indicates that server connectivity to network function
endpoints is supported.";
    }

    container vomci {
      description
        "Data nodes associated with the vOMCI Proxy.";
      leaf message-timeout {
        type uint16 {
          range "10..max";
        }
        units "seconds";
        default "900";
        description
          "The maximum number of seconds for a response to be
received to a transmitted vOMCI message. The timeout is
used to clean up stale vOMCI messages. The timeout is
only applicable when OMCI message retransmission
capability is not currently enabled for this entity.";
      }

      container omci-message-retransmission {
        if-feature bbf-omci-mr:omci-message-retransmission;
        description
          "OMCI message retransmission capability data.";
        leaf enabled {
          type boolean;
          default "true";
          description
            "Administratively enable the use of the OMCI message
retransmission capability for the network function.";
        }

        leaf low-priority-transmission-timeout {
          type uint16 {
            range "10..max";
          }
          units "milliseconds";
          default "1000";
          description
            "The maximum number of milliseconds that the retransmission
function waits for an acknowledge before transmitting the
low priority message (Tmax0).";
        }

        leaf high-priority-transmission-timeout {
          type uint16 {
            range "10..max";
          }
          units "milliseconds";
          default "1000";
          description
            "The maximum number of milliseconds that the retransmission
function waits for an acknowledge before transmitting the
high priority message (Tmax1).";
        }

        leaf low-priority-message-retries {
          type uint8 {
            range "0..max";
          }
          default "3";
          description
            "The maximum retries for a low priority message (Rmax0).";
        }

        leaf high-priority-message-retries {
          type uint8 {
            range "0..max";
          }
          default "3";
          description
            "The maximum retries for a high priority message (Rmax1).";
        }
      }  // container omci-message-retransmission

      container remote-nf {
        presence
          "Enables access to remote network functions";
        description
          "Data nodes to manage remote network functions (NF).";
        container nf-client {
          if-feature bbf-vomci-proxy:nf-client;
          description
            "Data nodes to manage the clients of the network function.";
          leaf enabled {
            type boolean;
            default "true";
            description
              "Administratively enable the use of client connectivity
capability to connect to network function endpoints.";
          }

          container initiate {
            description
              "Configures client initiating underlying connections. If
there are multiple remote-servers, they may be
connected to in parallel.";
            list remote-server {
              key "name";
              description
                "A remote server the client will connect to.";
              leaf name {
                type bbf-yang:string-ascii64;
                description
                  "An arbitrary name for the remote server.";
              }

              leaf nf-type {
                type identityref {
                  base bbf-nft:nf-type;
                }
                description
                  "The type of remote communication endpoint
(e.g, vOMCI-proxy, vOMCI-function, vOLTMF, OLT).";
              }

              leaf on-demand {
                type boolean;
                default "false";
                description
                  "Determines whether the client establishes a
connection to the endpoint only on-demand ('true')
or is establishes a connection permanently
('false').";
              }

              leaf local-service-endpoint {
                type bbf-yang:string-ascii64;
                description
                  "The name that the NF will use when reporting the
NF as an endpoint. For example, see sections
5.8.2.1 Hello vOMCI service and 5.7.1.2.1.1 Hello
Message (service-endpoint-name) in TR-451 for how
this parameter is used for vOMCI communication.";
                reference
                  "TR-451: vOMCI Specification, sections 5.8.2.1,
                  5.7.1.2.1.1";

              }

              choice transport {
                mandatory true;
                description
                  "Selects between available client transports.";
                case grpc {
                  description
                    "Selection for gRPC client transport.";
                  container grpc-client {
                    if-feature bbf-grpcc:grpc-client;
                    description
                      "A wrapper around the gRPC client parameters to avoid name
collisions.";
                    container channel {
                      description
                        "The gRPC channel properties.";
                      leaf ping-interval {
                        type uint32 {
                          range "0..max";
                        }
                        units "seconds";
                        default "300";
                        description
                          "Sets the amount of time after which a ping request is sent.
A value of 0 disables pings from being sent.";
                      }
                    }  // container channel

                    container connection-backoff {
                      if-feature bbf-grpcc:connection-backoff;
                      description
                        "The connection backoff directs how a client reconnects to a
remote endpoint after discovering its connection to the
remote endpoint has dropped.";
                      reference
                        "github.com/grpc/grpc/blob/master/doc/connection-backoff.md.";

                      leaf enable {
                        type boolean;
                        default "true";
                        description
                          "If 'true', connection-backoff is enabled.";
                      }

                      leaf initial-backoff {
                        type uint16 {
                          range "1..max";
                        }
                        units "seconds";
                        default "30";
                        description
                          "The initial wait period after the first failure before
retrying.";
                      }

                      leaf min-connect-timeout {
                        type uint16 {
                          range "1..max";
                        }
                        units "seconds";
                        default "20";
                        description
                          "The minimum time to wait for the connection attempts.";
                      }

                      leaf multiplier {
                        type decimal64 {
                          fraction-digits
                            2;
                        }
                        default "1.60";
                        description
                          "The factor with which to multiply the backoff after a
failed retry.";
                      }

                      leaf jitter {
                        type decimal64 {
                          fraction-digits
                            2;
                        }
                        default "0.20";
                        description
                          "The factor with which to randomize the backoff.";
                      }

                      leaf max-backoff {
                        type uint16 {
                          range "1..max";
                        }
                        default "10";
                        description
                          "The number of times the client tries to connect to a
specific endpoint before moving on to the next endpoint
in the list (round robin).";
                      }
                    }  // container connection-backoff

                    list access-point {
                      key "name";
                      min-elements 1;
                      ordered-by user;
                      description
                        "A user-ordered list of access points that the client will
attempt to connect to in the specified sequence. Defining
more than one enables high-availability.";
                      leaf name {
                        type bbf-yang:string-ascii64;
                        description
                          "An arbitrary name for the access point.";
                      }

                      container grpc-transport-parameters {
                        description
                          "gRPC agent transport parameters.";
                        choice tcp-client-options {
                          description
                            "Replicate some pre-standard IETF client/server
options in-file, and provide a place to add IETF
client/server stack options post-standard in the
future.";
                          container remote-port {
                            description
                              "The remote port identified by a client.";
                            leaf remote-port {
                              type inet:port-number;
                              default "8443";
                              description
                                "The client will attempt to connect to the
common port value for 'grpc' (8443) if no
value is specified.";
                            }
                          }  // container remote-port
                        }  // choice tcp-client-options
                      }  // container grpc-transport-parameters

                      notification remote-endpoint-status-change {
                        description
                          "A notification traceable to a client remote-endpoint
and access-point. This notification is sent when a
remote-endpoint is connected or disconnected.";
                        leaf connected {
                          type boolean;
                          mandatory true;
                          description
                            "New remote-endpoint status.";
                        }

                        leaf last-changed {
                          type yang:date-and-time;
                          mandatory true;
                          description
                            "The system date and time when the remote-endpoint was
connected or disconnected.";
                        }
                      }  // notification remote-endpoint-status-change
                    }  // list access-point
                  }  // container grpc-client
                }  // case grpc
              }  // choice transport
            }  // list remote-server
          }  // container initiate
        }  // container nf-client

        container nf-server {
          if-feature bbf-vomci-proxy:nf-server;
          description
            "Data nodes to manage the server of the network function.";
          leaf enabled {
            type boolean;
            default "true";
            description
              "Administratively enable the use of server connectivity
capability to connect to network function endpoints.";
          }

          container listen {
            presence
              "Enables server to listen for client connections.";
            description
              "Configures listen behavior.";
            leaf idle-timeout {
              type uint16;
              units "seconds";
              default "3600";
              description
                "The maximum number of seconds that a session may remain
idle. A session will be dropped if it is idle for an
interval longer than this number of seconds. If set to
zero, then the server will never drop a session because
it is idle. Sessions that have a notification subscription
active are never dropped.";
            }

            list listen-endpoint {
              key "name";
              min-elements 1;
              description
                "The endpoints to listen for connections.";
              leaf name {
                type bbf-yang:string-ascii64;
                description
                  "An arbitrary name for the listen endpoint.";
              }

              leaf local-service-endpoint {
                type bbf-yang:string-ascii64;
                description
                  "The name that this network function will use when
reporting itself as an endpoint. For example, see section
5.8.2.1 Hello vOMCI service in TR-451 for how this
parameter is used for vOMCI communication. The value in
this leaf is typically the same value as the name of the
'listen-endpoint' but could be different for certain
deployments. If this leaf is not configured the name of
the 'listen-endpoint' is used.";
                reference
                  "TR-451 section 5.8.2.1";

              }

              choice transport {
                mandatory true;
                description
                  "Selects between available transports.";
                case grpc {
                  description
                    "Selection for gRPC server transport.";
                  container grpc-server {
                    if-feature bbf-grpcs:grpc-server;
                    description
                      "A wrapper around the gRPC server parameters to avoid name
collisions.";
                    choice tcp-client-options {
                      description
                        "Replicate some pre-standard IETF client/server options
in-file, and provide a place to add IETF client/server
stack options post-standard in the future.";
                      leaf remote-port {
                        type inet:port-number;
                        default "8443";
                        description
                          "The client will attempt to connect to the well-known
port value for 'grpc' (8443) if no value is
specified.";
                      }
                    }  // choice tcp-client-options
                  }  // container grpc-server
                }  // case grpc
              }  // choice transport

              container remote-clients {
                config false;
                description
                  "Remote clients that are currently connected to the
server.";
                list remote-client {
                  key "local-service-endpoint";
                  description
                    "A remote client that is currently connected.";
                  leaf local-service-endpoint {
                    type bbf-yang:string-ascii64;
                    description
                      "Identity of the local service endpoint of the remote
endpoint as provided as part of the vOMCI hello
exchange when the connection to the remote endpoint
was established.";
                  }
                }  // list remote-client

                notification remote-client-status-change {
                  description
                    "A notification traceable to a server listen endpoint
and a remote endpoint associated with the listen
endpoint. This notification is sent when remote
endpoint is connected or disconnected to/from the
listen endpoint.";
                  leaf remote-client {
                    type leafref {
                      path "../../../remote-clients/remote-client/local-service-endpoint";
                      require-instance
                        false;
                    }
                    mandatory true;
                    description
                      "The remote endpoint that was connected or
disconnected.";
                  }

                  leaf connected {
                    type boolean;
                    mandatory true;
                    description
                      "If 'true', the remote endpoint was connected.";
                  }

                  leaf remote-endpoint-state-last-change {
                    type yang:date-and-time;
                    mandatory true;
                    description
                      "The system date and time when the remote endpoint was
connected or disconnected.";
                  }
                }  // notification remote-client-status-change
              }  // container remote-clients
            }  // list listen-endpoint
          }  // container listen
        }  // container nf-server
      }  // container remote-nf

      container statistics {
        config false;
        description
          "The OMCI function statistics.";
        action reset {
          description
            "Reset the counters of the statistics.";
        }  // rpc reset

        leaf last-reset-time {
          type yang:date-and-time;
          description
            "The date and time that the counters were last reset or the
function was enabled.";
        }

        leaf out-low-priority-messages {
          type yang:counter64;
          units "messages";
          description
            "The number of ITU G.988 OMCI ME low priority messages that
have been sent by the function.";
        }

        leaf in-low-priority-messages {
          type yang:counter64;
          units "messages";
          description
            "The number of ITU G.988 OMCI ME low priority messages that
have been received by the function.";
        }

        leaf out-low-priority-messages-retransmissions {
          type yang:counter64;
          units "messages";
          description
            "The number of ITU G.988 OMCI ME low priority messages that
have been retransmitted.";
        }

        leaf out-high-priority-messages {
          type yang:counter64;
          units "messages";
          description
            "The number of ITU G.988 OMCI ME high priority messages that
have been sent by the function.";
        }

        leaf in-high-priority-messages {
          type yang:counter64;
          units "messages";
          description
            "The number of ITU G.988 OMCI ME high priority messages
that have been received by the function.";
        }

        leaf out-high-priority-messages-retransmissions {
          type yang:counter64;
          units "messages";
          description
            "The number of ITU G.988 OMCI ME high priority messages
that have been retransmitted.";
        }

        leaf min-onu-rtt {
          type uint32;
          units "milliseconds";
          description
            "The number of minimum round trip time (rtt) in milliseconds,
for any request to the ONU.";
        }

        leaf max-onu-rtt {
          type uint32;
          units "milliseconds";
          description
            "The number of maximum round trip time (rtt) in milliseconds,
for any request to the ONU.";
        }
      }  // container statistics

      container managed-onus {
        description
          "The ONUs that are being managed by this entity.";
        action create-onu {
          description
            "Create an ONU within the vOMCI Proxy.";
          input {
            leaf name {
              type bbf-vomcit:onu-name;
              description
                "The unique name of the ONU.";
            }

            leaf xpon-onu-type {
              type identityref {
                base bbf-vomcit:xpon-onu-type;
              }
              description
                "The ONU's xPON type.";
            }
          }
        }  // rpc create-onu

        list managed-onu {
          key "name";
          config false;
          description
            "An ONU that is being managed by this entity.";
          leaf name {
            type bbf-vomcit:onu-name;
            description
              "The unique name of the ONU.";
          }

          leaf xpon-onu-type {
            type identityref {
              base bbf-vomcit:xpon-onu-type;
            }
            description
              "The ONU's xPON type.";
          }

          action delete-onu {
            description
              "Delete an ONU within the ONU Proxy. Note that this is not
the YANG state data but the Managed Entities state data
used to manage the ONU (e.g., MIB data sync valule).";
            input {
              leaf delete-state-data {
                type boolean;
                default "true";
                description
                  "When true, the ONU state data is deleted.";
              }
            }
          }  // rpc delete-onu

          action delete-only-onu-state-data {
            description
              "Delete remaining state data for ONUs that have already
been deleted from the list of managed ONUS. Note - Do not
execute this unless the ONU has already been deleted with
'delete-onu' and with the 'delete-state-data' leaf set to
'true'. Note that this is not the YANG state data but the
Managed Entities state data used to manage the ONU (e.g.,
MIB data sync valule).";
          }  // rpc delete-only-onu-state-data

          action set-onu-communication {
            description
              "Dynamically configure the information necessary to
establish if an ONU can be communicated with by the vOMCI
Proxy along with remote endpoint to use.";
            input {
              leaf onu-communication-available {
                type boolean;
                description
                  "When true, the ONU is able to be communicated with
across the ONU management chain of entities.";
              }

              leaf olt-remote-endpoint {
                type bbf-yang:string-ascii64;
                description
                  "The remote endpoint name to use for transmitting
vOMCI messages toward the OLT.";
              }

              leaf vomci-function-remote-endpoint {
                type bbf-yang:string-ascii64;
                description
                  "The remote endpoint name to use for transmitting
vOMCI messages toward the vOMCI function.";
              }

              leaf xpon-onu-type {
                type identityref {
                  base bbf-vomcit:xpon-onu-type;
                }
                description
                  "The ONU's xPON type.";
              }

              container onu-attachment-point {
                description
                  "The current ONU attachment point";
                leaf olt-name {
                  type bbf-vomcit:olt-name;
                  description
                    "The OLT name where the ONU is attached";
                }

                leaf channel-termination-name {
                  type string;
                  description
                    "The channel termination name where the ONU is attached.";
                }

                leaf onu-id {
                  type bbf-xpon-types:onu-id;
                  description
                    "This is the TC layer ONU-ID identifier assigned to the
ONU by the OLT during ONU activation.";
                  reference
                    "ITU-T G.984.3 clause 5.5.2
                    ITU-T G.987.3 clause 6.4.2
                    ITU-T G.9807.1 clause C.6.1.5.6
                    ITU-T G.989.3 clause 6.1.5.6";

                }
              }  // container onu-attachment-point
            }
          }  // rpc set-onu-communication

          container onu-attachment-point {
            description
              "The current ONU attachment point";
            leaf olt-name {
              type bbf-vomcit:olt-name;
              description
                "The OLT name where the ONU is attached";
            }

            leaf channel-termination-name {
              type string;
              description
                "The channel termination name where the ONU is attached.";
            }

            leaf onu-id {
              type bbf-xpon-types:onu-id;
              description
                "This is the TC layer ONU-ID identifier assigned to the
ONU by the OLT during ONU activation.";
              reference
                "ITU-T G.984.3 clause 5.5.2
                ITU-T G.987.3 clause 6.4.2
                ITU-T G.9807.1 clause C.6.1.5.6
                ITU-T G.989.3 clause 6.1.5.6";

            }
          }  // container onu-attachment-point

          leaf onu-communication-available {
            type boolean;
            description
              "When true, the ONU is able to be communicated with
across the ONU management chain of entities.";
          }

          leaf olt-remote-endpoint {
            type bbf-yang:string-ascii64;
            description
              "The name remote endpoint to use for transmitting vOMCI
messages toward the OLT.";
          }

          leaf vomci-function-remote-endpoint {
            type bbf-yang:string-ascii64;
            description
              "The remote endpoint name to use for transmitting vOMCI
messages toward the vOMCI function.";
          }

          container statistics {
            description
              "vOMCI message and retransmission statistics.";
            action reset {
              description
                "Reset the counters of the vomci-statistics.";
            }  // rpc reset

            leaf out-messages {
              type yang:counter64;
              units "counters";
              description
                "The number of vOMCI messages that have been transmitted by
the function.";
            }

            leaf in-messages {
              type yang:counter64;
              units "counters";
              description
                "The number of vOMCI messages that have been received by the
function.";
            }

            leaf errored-messages {
              type yang:counter64;
              units "counters";
              description
                "The number of vOMCI messages that have had errors.  This
includes both inbound and outbound errors. For example,
unable to send, or didn't receive expected response.";
            }

            leaf last-reset-time {
              type yang:date-and-time;
              description
                "The date and time that the counters were last reset or the
function was enabled.";
            }

            leaf out-low-priority-messages {
              type yang:counter64;
              units "messages";
              description
                "The number of ITU G.988 OMCI ME low priority messages that
have been sent by the function.";
            }

            leaf in-low-priority-messages {
              type yang:counter64;
              units "messages";
              description
                "The number of ITU G.988 OMCI ME low priority messages that
have been received by the function.";
            }

            leaf out-low-priority-messages-retransmissions {
              type yang:counter64;
              units "messages";
              description
                "The number of ITU G.988 OMCI ME low priority messages that
have been retransmitted.";
            }

            leaf out-high-priority-messages {
              type yang:counter64;
              units "messages";
              description
                "The number of ITU G.988 OMCI ME high priority messages that
have been sent by the function.";
            }

            leaf in-high-priority-messages {
              type yang:counter64;
              units "messages";
              description
                "The number of ITU G.988 OMCI ME high priority messages
that have been received by the function.";
            }

            leaf out-high-priority-messages-retransmissions {
              type yang:counter64;
              units "messages";
              description
                "The number of ITU G.988 OMCI ME high priority messages
that have been retransmitted.";
            }

            leaf min-onu-rtt {
              type uint32;
              units "milliseconds";
              description
                "The number of minimum round trip time (rtt) in milliseconds,
for any request to the ONU.";
            }

            leaf max-onu-rtt {
              type uint32;
              units "milliseconds";
              description
                "The number of maximum round trip time (rtt) in milliseconds,
for any request to the ONU.";
            }
          }  // container statistics
        }  // list managed-onu
      }  // container managed-onus
    }  // container vomci
  }  // module bbf-vomci-proxy