YANG Module for BGP Communities

module: draft-ietf-grow-yang-bgp-communities
  +--rw bgp-communities
     +--rw serial         uint32
     +--rw uri?           inet:uri
     +--rw description?   string
     +--rw contacturl?    inet:uri
     +--rw contacts* [emailaddress]
     |  +--rw emailaddress          inet:email-address
     |  +--rw name?                 string
     |  +--rw role?                 string
     |  +--rw organization?         string
     |  +--rw organizationalunit?   string
     +--rw regular* [name]
     |  +--rw name           community-name
     |  +--rw category?      community-category
     |  +--rw description?   community-description
     |  +--rw globaladmin    two-octet-as-number
     |  +--rw localadmin
     |     +--rw format?   localadmin-format
     |     +--rw fields* [name]
     |        +--rw name           field-name
     |        +--rw length?        uint8
     |        +--rw pattern        field-pattern
     |        +--rw description?   field-description
     +--rw extended* [name]
     |  +--rw name             community-name
     |  +--rw category?        community-category
     |  +--rw description?     community-description
     |  +--rw type             uint8
     |  +--rw subtype          uint8
     |  +--rw (globaladmin)
     |  |  +--:(asn)
     |  |  |  +--rw asn?   two-octet-as-number
     |  |  +--:(asn4)
     |  |     +--rw asn4?   inet:as-number
     |  +--rw localadmin
     |     +--rw format?   localadmin-format
     |     +--rw fields* [name]
     |        +--rw name           field-name
     |        +--rw length?        uint8
     |        +--rw pattern        field-pattern
     |        +--rw description?   field-description
     +--rw large* [name]
        +--rw name              community-name
        +--rw category?         community-category
        +--rw description?      community-description
        +--rw globaladmin       inet:as-number
        +--rw localdatapart1
        |  +--rw format?   localadmin-format
        |  +--rw fields* [name]
        |     +--rw name           field-name
        |     +--rw length?        uint8
        |     +--rw pattern        field-pattern
        |     +--rw description?   field-description
        +--rw localdatapart2
           +--rw format?   localadmin-format
           +--rw fields* [name]
              +--rw name           field-name
              +--rw length?        uint8
              +--rw pattern        field-pattern
              +--rw description?   field-description

module draft-ietf-grow-yang-bgp-communities {

  yang-version 1.1;

  namespace "urn:to-be-defined";

  prefix bgpcomm;

  import ietf-inet-types {
    prefix inet;
    revision-date 2021-02-22;
    reference
      "draft-ietf-netmod-rfc6991-bis-15: Common YANG Data Types";
  }

  organization
    "IETF GROW Working Group";

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

     Author:   Martin Pels
       <mailto:mpels@ripe.net>";

  description
    "This module describes a structure for BGP Communities";

  revision "2024-06-15" {
    description
      "Fixed regular expression patterns.";
    reference
      "RFC YYYY: YANG Module for BGP Communities
       RFC-EDITOR: please update YYYY with this RFC ID";
  }

  revision "2024-02-21" {
    description
      "Added data types and string restrictions.
       Added category leaf.";
    reference
      "draft-ietf-grow-yang-bgp-communities-01";
  }

  revision "2023-08-01" {
    description
      "Initial version.";
    reference
      "draft-ietf-grow-yang-bgp-communities-00";
  }

  typedef two-octet-as-number {
    type uint16;
    description
      "This type represents autonomous system numbers, which
       identify an Autonomous System (AS).

       Autonomous system numbers were originally limited to 16
       bits.  BGP extensions have enlarged the autonomous system
       number space to 32 bits.  The two-octet-as-number type uses
       an uint16 base type for use cases where the enlarged number
       space is not supported.";
    reference
      "RFC 1930: Guidelines for creation, selection, and registration
                   of an Autonomous System (AS)";
  }

  typedef community-name {
    type string {
      length 1..255;
      pattern '[^ \t\r\n\p{C}]+';
    }
    description
      "This type restricts values for the name of a BGP community.";
  }

  typedef community-category {
    type enumeration {
      enum informational {
        value 0;
        description
          "Informational community";
      }
      enum action {
        value 1;
        description
          "Action community";
      }
    }
    description
      "This type restricts values for the category of a BGP community.";
  }

  typedef community-description {
    type string {
      length 1..65535;
      pattern '[^\p{C}]+';
    }
    description
      "This type restricts values for the description of a BGP
       community.";
  }

  typedef localadmin-format {
    type enumeration {
      enum decimal {
        value 0;
        description
          "Decimal number string";
      }
      enum binary {
        value 1;
        description
          "Bit string";
      }
    }
    description
      "This type defines the format options for a BGP community
       localadmin/localdata field encoding";
  }

  typedef field-name {
    type string {
      length 1..255;
      pattern '[^ \t\r\n\p{C}]+';
    }
    description
      "This type restricts values for the name leaf of a BGP community
       localadmin/localdata field.";
  }

  typedef field-pattern {
    type string {
      length 1..4095;
      pattern '[-0-9.,*?^$+|(){}\[\]]+';
    }
    description
      "This type restricts values for the pattern leaf of a BGP
       community localadmin/localdata field.  Patterns are
       described as POSIX Extended Regular Expressions";
    reference
      "IEEE 1003.2-1992: Information Technology - Portable
       Operating System Interface (POSIX) - Part 2: Shell and
       Utilities (Vol. 1)";
  }

  typedef field-description {
    type string {
      length 1..65535;
      pattern '[^\p{C}]+';
    }
    description
      "This type restricts values for the description leaf of a BGP
       community localadmin/localdata field.";
  }

  grouping localadmin-fields {
    list fields {
      ordered-by user;
      key "name";

      leaf name {
        type field-name;
        mandatory true;
        description
          "The name of the field";
      }

      leaf length {
        type uint8;
        description
          "Length of the field";
      }

      leaf pattern {
        type field-pattern;
        mandatory true;
        description
          "Regular Expression describing the expected contents of
           the field";
      }

      leaf description {
        type field-description;
        description
          "A text description of the field contents";
      }
    }
  }

  container bgp-communities {

    leaf serial {
      type uint32;
      mandatory true;
      description
        "Version number of the community set";
    }

    leaf uri {
      type inet:uri;
      description
        "Publication point for the community set";
    }

    leaf description {
      type string {
        length 1..65535;
        pattern '[^\p{C}]+';
      }
      description
        "A description for the community set";
    }

    leaf contacturl {
      type inet:uri;
      description
        "A reference to a webpage with maintainer contact information";
    }

    list contacts {
      key "emailaddress";

      leaf emailaddress {
        type inet:email-address;
        description
          "Maintainer contact e-mail address";
      }

      leaf name {
        type string {
          length 1..255;
          pattern '[^\p{C}]+';
        }
        description
          "Maintainer contact name";
      }

      leaf role {
        type string {
          length 1..255;
          pattern '[^\p{C}]+';
        }
        description
          "Maintainer contact role";
      }

      leaf organization {
        type string {
          length 1..255;
          pattern '[^\p{C}]+';
        }
        description
          "Maintainer contact organization";
      }

      leaf organizationalunit {
        type string {
          length 1..255;
          pattern '[^\p{C}]+';
        }
        description
          "Maintainer contact organizational unit";
      }
    }

    list regular {
      key "name";

      leaf name {
        type community-name;
        mandatory true;
        description
          "Community name";
      }

      leaf category {
        type community-category;
        description
          "Category of the community";
      }

      leaf description {
        type community-description;
        description
          "Description for the community";
      }

      leaf globaladmin {
        type two-octet-as-number;
        mandatory true;
        description
          "Global Administrator field";
      }

      container localadmin {
        leaf format {
          type localadmin-format;
          default decimal;
          description
            "Format used for parsing localadmin fields";
        }

        uses localadmin-fields;
      }

      description
        "A list of objects defining Regular BGP Communities";
      reference
        "RFC1997: BGP Communities Attribute";
    }

    list extended {
      key "name";

      leaf name {
        type community-name;
        mandatory true;
        description
          "Community name";
      }

      leaf category {
        type community-category;
        description
          "Category of the community";
      }

      leaf description {
        type community-description;
        description
          "Description for the community";
      }

      leaf type {
        type uint8;
        mandatory true;
        description
          "Type Field";
      }
      leaf subtype {
        type uint8;
        mandatory true;
        description
          "Sub-Type Field";
      }

      choice globaladmin {
        mandatory true;
        case asn {
          leaf asn {
            type two-octet-as-number;
            description
              "Two-Octet AS";
          }
        }
        case asn4 {
          leaf asn4 {
            type inet:as-number;
            description
              "Four-Octet AS";
          }
        }
      }

      container localadmin {
        leaf format {
          type localadmin-format;
          default decimal;
          description
            "Format used for parsing localadmin fields";
        }

        uses localadmin-fields;
      }

      description
        "A list of objects defining Extended BGP Communities";
      reference
        "RFC4360: BGP Extended Communities Attribute";
    }

    list large {
      key "name";

      leaf name {
        type community-name;
        mandatory true;
        description
          "Community name";
      }

      leaf category {
        type community-category;
        description
          "Category of the community";
      }

      leaf description {
        type community-description;
        description
          "Description for the community";
      }

      leaf globaladmin {
        type inet:as-number;
        mandatory true;
        description
          "Global Administrator field";
      }

      container localdatapart1 {
        leaf format {
          type localadmin-format;
          default decimal;
          description
            "Format used for parsing localadmin fields";
        }

        uses localadmin-fields;
      }

      container localdatapart2 {
        leaf format {
          type localadmin-format;
          default decimal;
          description
            "Format used for parsing localadmin fields";
        }

        uses localadmin-fields;
      }

      description
        "A list of objects defining Large BGP Communities";
      reference
        "RFC8092: BGP Large Communities Attribute";
    }
  }
}