module dhcp-client-ext {

    yang-version 1;

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

    prefix dhcp-ext;

    import ietf-inet-types {
      prefix inet;
    }
    import dhcp-client {
      prefix dhcp;
    }
    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";

    augment /dhcp:clientv4 {
      container dhcpClientStatus {
        list client-if {
          tailf:callpoint "dhcp-client-oper";
          key "ifName";
          config false;
          leaf ifName {
            type string;
            description
              "Interface name which has DHCP Address";
          }

          leaf clientIpAddr {
            type inet:ipv4-address;
            description
              "Specify the IP address obtained from DHCP server on the interface";
          }

          leaf-list dnsServerIpAddr {
            type inet:ipv4-address;
            description
              "Specify the DNS server IP address obtained from DHCP server on the interface";
          }

          leaf leaseTime {
            type yang:timeticks;
            mandatory true;
            description
              "Lease time for DHCPv4 address";
          }
        }  // list client-if
      }  // container dhcpClientStatus
    }

    augment /dhcp:clientv4 {
      list client-if {
        key "ifName";
        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 ifName {
          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.";
          }
          description
            "Specify the interface name that dhcp client configured on";
        }

        leaf enable {
          type boolean;
          must
            "(((current() = 'false') and  (((count (/if:interfaces/if:interface[if:name=current()/../ifName]/ip:ipv4/ip:address) > 0) and (/if:interfaces/if:interface[if:name=current()/../ifName]/ip:ipv4/ip:enabled = 'true'))))or (current() = 'true'))" {
            error-message
              "No Static IPV4 address assigned/Enabled for this interface";
          }
          default "true";
          description
            "Enable or disable dhcp client function";
        }
      }  // list client-if
    }
  }  // module dhcp-client-ext