module dhcpv6-client-ext {

    yang-version 1;

    namespace
      "urn:fujitsu:params:xml:ns:dhcpv6-client-ext";

    prefix dhcpv6-ext;

    import ietf-inet-types {
      prefix inet;
    }
    import dhcpv6-client {
      prefix dhcpv6;
    }
    import ietf-interfaces {
      prefix if;
    }
    import ietf-ip {
      prefix ip;
    }
    import tailf-common {
      prefix tailf;
    }
    import fujitsu-system {
      prefix sys;
    }
    import ietf-yang-types {
      prefix yang;
      revision-date "2013-07-15";
    }

    organization "Fujitsu Ltd.";

    contact
      "Fujitsu Ltd.

Address: 2801 Telecom Parkway
Richardson, Texas 75082

Tel: +1-800-USE-FTAC (1-800-873-3822)
Email: ftac@fnc.fujitsu.com
Web: www.fujitsu.com/us/services/telecom";

    description
      "This module is used to add dhcp client status in base yang.
Copyright (c) 2016 Fujitsu Ltd.
All rights reserved. ";

    revision "2016-04-05";

    typedef duidtype {
      type string {
        pattern '(([0-9a-fA-F]{2}){6,10})';
      }
      description
        "the type defined for duid";
    }

    augment /dhcpv6:clientv6 {
      container dhcpv6ClientStatus {
        list client-if {
          tailf:callpoint "dhcpv6-client-if";
          key "if-name";
          config false;
          leaf if-name {
            type string;
            mandatory true;
            description "interface name";
          }

          container identity-associations {
            config false;
            description
              "IA is a construct through
which a server and a client can identify,
group, and manage a set of related IPv6
addresses. The key of the list is a
4-byte number IAID defined in [RFC3315].";
            list identity-association {
              tailf:callpoint "dhcpv6-id-association";
              key "iaid";
              description "IA";
              leaf iaid {
                type uint32;
                mandatory true;
                description "IAID";
              }

              leaf ia-type {
                type string;
                mandatory true;
                description "IA type";
              }

              leaf-list ipv6-addr {
                type inet:ipv6-address;
                description "ipv6 address";
              }

              leaf t1-time {
                type yang:timeticks;
                mandatory true;
                description "t1 time";
              }

              leaf t2-time {
                type yang:timeticks;
                mandatory true;
                description "t2 time";
              }

              leaf preferred-lifetime {
                type yang:timeticks;
                mandatory true;
                description
                  "preferred lifetime";
              }

              leaf valid-lifetime {
                type yang:timeticks;
                mandatory true;
                description "valid lifetime";
              }
            }  // list identity-association
          }  // container identity-associations
        }  // list client-if
      }  // container dhcpv6ClientStatus
    }

    augment /dhcpv6:clientv6 {
      list client-if {
        key "if-name";
        description
          "A client may have several
interfaces, it is more reasonable to
configure and manage parameters on
the interface-level. The list defines
specific client interfaces and their
data. Different interfaces are distinguished
by the key which is a configurable string
value.";
        leaf if-name {
          type string;
          must
            "(((re-match(., 'ip-.*(LCN2)') = 'true') and (/sys:system/sys:neMgmtMode = 'Router')) or (re-match(., 'ip-.*(LCN|LCN1)') = 'true'))" {
            error-message
              "TYPE not supported (or) LCN2 is only allowed in Router mode.";
          }
          mandatory true;
          description "interface name";
        }

        leaf duid {
          type duidtype;
          mandatory true;
          description
            "DHCP Unique
Identifer";
        }

        leaf enable {
          type boolean;
          must
            "(((current() = 'false') and  (((count (/if:interfaces/if:interface[if:name=current()/../if-name]/ip:ipv6/ip:address) > 0) and  (/if:interfaces/if:interface[if:name=current()/../if-name]/ip:ipv6/ip:enabled = 'true'))))or (current() = 'true'))" {
            error-message
              "No Static IPV6 address assigned/Enabled for this interface";
          }
          mandatory true;
          description
            "whether the interface is enabled";
        }

        leaf rapid-commit {
          type boolean;
          mandatory true;
          description
            "'1' indicates a client can
initiate a Solicit-Reply message exchange
by adding a Rapid Commit option in Solicit
message. '0' means the client is not allowed
to add a Rapid Commit option to request
addresses in a two-message exchange
pattern.";
        }
      }  // list client-if
    }
  }  // module dhcpv6-client-ext