<div class="content" name="R_DhcpGetClientInfo" uuid="a59ad25b-b058-420b-9176-b0a00c460478"><p>The <b>R_DhcpGetClientInfo</b> method retrieves <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 record</a> information
from the <a href="a9d6a415-4de6-4058-befe-ca2e42764485#gt_005ffc96-bb67-44ca-938f-dd7ec3c95cab" data-linktype="relative-path">DHCPv4 server
database</a>. The caller of this function can free the memory pointed to by the
<i>ClientInfo</i> parameter by calling the function <b>midl_user_free</b>
(section <a href="a7e5f2d1-04b7-4363-bdc0-76a1099664eb" data-linktype="relative-path">3</a>).</p><dl>
<dd>
<div><pre> DWORD R_DhcpGetClientInfo(
   [in, unique, string] DHCP_SRV_HANDLE ServerIpAddress,
   [in, ref] LPDHCP_SEARCH_INFO SearchInfo,
   [out] 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>SearchInfo: </b>This is a pointer of type <a href="f8ab6a93-be31-4643-b32c-e0ae6ba95a44" data-linktype="relative-path">DHCP_SEARCH_INFO (section 2.2.1.2.18)</a>
structure that defines the key to be used to search the DHCPv4 client lease
record on the <a href="a9d6a415-4de6-4058-befe-ca2e42764485#gt_746786e7-458f-45aa-ab24-5534a94b4fb3" data-linktype="relative-path">DHCPv4 server</a>.
In case the <b>SearchType</b> member is DhcpClientName and there are multiple
lease records with the same <b>ClientName</b>, the server will return client
information for the client having the lowest numerical IP address.</p><p><b>ClientInfo: </b>This is a pointer of type <a href="91d65e7e-d5c5-443e-a863-781dba950962" data-linktype="relative-path">LPDHCP_CLIENT_INFO</a> that
points to the location in which specific DHCPv4 client lease record information
is retrieved. The <b>ClientHardwareAddress</b> member represents a <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>)</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 DHCP 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 18.</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 access per
section <a href="baec2112-1146-4c42-b77e-b706e170a590" data-linktype="relative-path">3.5.4</a>. If not,
return the error ERROR_ACCESS_DENIED.</p>
</li><li><p><span><span> 
</span></span>Iterate through the <b>DHCPv4ClientsList</b> ADM element of all
the <b>DHCPv4Scope</b> ADM element entries in the server ADM element <b>DHCPv4ScopesList</b>,
and retrieve the first <b>DHCPv4Client</b> ADM element entry corresponding to
the <b>ClientIpAddress</b> member, <b>ClientHardwareAddress</b> member, or <b>ClientName</b>
member as specified by the <b>SearchType</b> member in the <i>SearchInfo</i>
parameter (section 2.2.1.2.18). If the <b>DHCPv4Client</b> ADM element entry is
not found, return ERROR_DHCP_JET_ERROR.</p>
</li><li><p><span><span> 
</span></span>Allocate memory for the out parameter <i>ClientInfo</i> (section
2.2.1.2.12), copy the information in the <b>DHCPv4Client</b> ADM element entry
in <i>ClientInfo</i>, and return ERROR_SUCCESS (0x00000000). The <b>HostName</b>
member in <a href="51e16f4a-cb1d-400a-85c7-defe4cba1609" data-linktype="relative-path">DHCP_HOST_INFO (section 2.2.1.2.7)</a>
is unused.</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>