<div class="content" name="R_DhcpSetClientInfo" uuid="03662f6a-153c-42eb-9a49-93125ead0ec6"><p>The <b>R_DhcpSetClientInfo</b> method modifies existing <a href="a9d6a415-4de6-4058-befe-ca2e42764485#gt_c35fc04f-54fe-4570-afd3-c96ca84c8d83" data-linktype="relative-path">DHCPv4 client</a> <a href="a9d6a415-4de6-4058-befe-ca2e42764485#gt_e6d76b31-2852-4bd5-8fbb-8e82a3cedb29" data-linktype="relative-path">lease records</a> on the <a href="a9d6a415-4de6-4058-befe-ca2e42764485#gt_005ffc96-bb67-44ca-938f-dd7ec3c95cab" data-linktype="relative-path">DHCPv4 server database</a>. </p><dl>
<dd>
<div><pre> DWORD R_DhcpSetClientInfo(
   [in, unique, string] DHCP_SRV_HANDLE ServerIpAddress,
   [in, ref] LPDHCP_CLIENT_INFO ClientInfo
 );
</pre></div>
</dd></dl><p><b>ServerIpAddress: </b>The IP address/host name of
the DHCP server. This parameter is unused.</p><p><b>ClientInfo: </b>A pointer of type <a href="91d65e7e-d5c5-443e-a863-781dba950962" data-linktype="relative-path">DHCP_CLIENT_INFO (section 2.2.1.2.12)</a>
structure that contains the DHCPv4 client lease record information that needs
to be modified within the DHCPv4 server database. The caller MUST pass the <b>ClientIPAddress</b>
and <b>ClientHardwareAddress</b> member fields for modification of a DHCPv4
client lease record stored in the DHCPv4 server database. The <b>ClientHardwareAddress</b>
member field represents a <a href="a9d6a415-4de6-4058-befe-ca2e42764485#gt_195d8585-7de6-4574-9abf-9db104aaa40c" data-linktype="relative-path">DHCPv4
client-identifier</a> (section <a href="7c88f58b-c615-4386-a643-ab05b860a003" data-linktype="relative-path">2.2.1.2.5.1</a>). The members <b>ClientName</b>,
<b>ClientComment</b>, <b>ClientLeaseExpires</b>, and <b>OwnerHost</b> are
modified in the DHCPv4 client lease record identified by the <b>ClientIPAddress</b>
member.</p><p><b>Return Values: </b>A 32-bit unsigned integer value
that indicates return status. A return value ERROR_SUCCESS (0x00000000)
indicates that the operation was completed successfully, else it contains a
Win32 error code, as specified in <a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a>.
This error code value can correspond to a DHCP-specific failure, which takes a
value between 20000 and 20099, or any generic failure.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Return value/code</p>
   </th>
   <th>
   <p>Description</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>0x00000000 ERROR_SUCCESS</td>
  <td>The call was successful.</td>
 </tr><tr>
  <td>0x00004E2D ERROR_DHCP_JET_ERROR</td>
  <td>An error occurred while accessing the DHCPv4 server database or the client entry is not present in the database.</td>
 </tr></tbody></table>
</dd></dl><p>The opnum field value for this method is 17.</p><p>When processing this call, the DHCP server MUST do the
following:</p><ul><li><p><span><span> 
</span></span>Validate whether this method is authorized for read/write access
per section <a href="38840bd0-0a5a-47ed-bc69-0dd870d33aec" data-linktype="relative-path">3.5.5</a>. If
not, return the error ERROR_ACCESS_DENIED.</p>
</li><li><p><span><span> 
</span></span>Validate whether the DHCPv4 client&#39;s hardware address data and
its length are non-NULL. If they are NULL, return the error
ERROR_INVALID_PARAMETER.</p>
</li><li><p><span><span> 
</span></span>Iterate through the server Abstract Data Model (ADM) element <b>DHCPv4ScopesList</b>,
and retrieve the <b>DHCPv4Scope</b> ADM element entry when the <b>DHCPv4ClientsList</b>
ADM element contains the <b>DHCPv4Client</b> ADM element entry corresponding to
the <b>ClientIpAddress</b> member of the <i>ClientInfo</i> parameter. If the <b>DHCPv4Client</b>
ADM element entry is not found, return ERROR_DHCP_JET_ERROR. In case of any
other error, return ERROR_INVALID_PARAMETER.</p>
</li><li><p><span><span> 
</span></span>Create the <a href="a9d6a415-4de6-4058-befe-ca2e42764485#gt_4c35997a-5d90-4d7e-96c8-346f4ad0a63f" data-linktype="relative-path">DHCPv4
client unique ID</a> (section <a href="651865ec-6404-4191-ad30-113578a94556" data-linktype="relative-path">2.2.1.2.5.2</a>) for the
DHCPv4 client from the <b>ScopeInfo.SubnetAddress</b> ADM element of the
specified <b>DHCPv4Scope</b> ADM element and from the DHCPv4 client-identifier,
which is the <b>ClientHardwareAddress</b> member specified in the <i>ClientInfo</i>
input parameter. </p>
</li><li><p><span><span> 
</span></span>Retrieve the <b>DHCPv4Client</b> ADM element entry corresponding
to the <b>ClientIpAddress</b> member of the <i>ClientInfo</i> parameter from
the <b>DHCPv4Scope.DHCPv4ClientsList</b> ADM element. Set the <b>DHCPv4Client.ClientHardWareAddress</b>
ADM element with the client unique ID created in the previous step. Set the <b>DHCPv4Client</b>
ADM element entry with the <b>IPAddress</b> member inside the <b>Ownerhost</b>
member of the <i>ClientInfo</i> parameter. Other members of <b>OwnerHost</b>,
namely <b>NetBIOSName</b> and <b>HostName</b> members, are ignored.</p>
</li><li><p><span><span> 
</span></span>If there is any <b>DHCPv4Reservation</b> ADM element entry in the
<b>DHCPv4Scope.DHCPv4ReservationsList</b> ADM element corresponding to the <b>ClientIPAddress</b>
member of the <i>ClientInfo</i> input parameter, then the <b>DHCPv4Client.ClientLeaseExpires</b>
ADM element is not modified; otherwise, if there is no such entry, update the <b>DHCPv4Client.ClientLeaseExpires</b>
ADM element with the lease expiry time specified in the <b>ClientLeaseExpires</b>
member.</p>
</li><li><p><span><span> 
</span></span>The <b>SubnetMask</b> member of the <i>ClientInfo</i> input
parameter is ignored. The <b>DHCPv4Client.SubnetMask</b> ADM element remains
unchanged and is equal to <b>ScopeInfo.SubnetAddress</b> ADM element of the
retrieved <b>DHCPv4Scope</b> ADM element. If the <b>ClientName</b> and <b>ClientComment</b>
string member fields of the <i>ClientInfo</i> input parameter are equal to
NULL, then the <b>ClientName</b> and <b>ClientComment</b> member fields of
retrieved <b>DHCPv4Client</b> ADM element entry are not modified; otherwise, if
they contain string values, then these parameters update the <b>DHCPv4Client.ClientName</b>
ADM element and <b>DHCPv4Client.ClientComment</b> ADM element.</p>
</li><li><p><span><span> 
</span></span>Set the <b>DHCPv4Client.AddressState</b> ADM element to
ADDRESS_STATE_ACTIVE.</p>
</li><li><p><span><span> 
</span></span>Return ERROR_SUCCESS.</p>
</li></ul><p><b>Exceptions Thrown:</b> No exceptions SHOULD be thrown
beyond those thrown by the underlying RPC protocol <a href="../ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15" data-linktype="relative-path">[MS-RPCE]</a>.</p></div>