<div class="content" name="R_DhcpGetMCastMibInfo" uuid="2edef397-cec8-4443-99bf-5d86cb5a17b9"><p>The <b>R_DhcpGetMCastMibInfo</b> method retrieves the
multicast counter values of the MADCAP server. The caller of this function can
free the memory pointed to by <i>MibInfo</i> 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_DhcpGetMCastMibInfo(
   [in, unique, string] DHCP_SRV_HANDLE ServerIpAddress,
   [out] LPDHCP_MCAST_MIB_INFO* MibInfo
 );
</pre></div>
</dd></dl><p><b>ServerIpAddress: </b>The IP address/host name of
the MADCAP server. This parameter is unused.</p><p><b>MibInfo: </b>This is of type <a href="926ed263-06bb-417a-9c82-b6d8635b8a33" data-linktype="relative-path">LPDHCP_MCAST_MIB_INFO</a>,
pointing to the location that contains the multicast MIB information of the
MADCAP server.</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></tbody></table>
</dd></dl><p>The opnum field value for this method is 31.</p><p>When processing this call, the MADCAP server MUST do the
following:</p><ul><li><p><span><span> 
</span></span>Validate if 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>Retrieve the server ADM element <b>DHCPv4ServerMcastMibInfo</b>
and copy the information in it to the <i>MibInfo</i> structure.</p>
</li><li><p><span><span> 
</span></span>Set the <b>Scopes</b> field of the <i>MibInfo</i> structure to
the number of entries in <b>DHCPv4MScopesList</b>.</p>
</li><li><p><span><span> 
</span></span>Incrementally calculate the statistics for all the <b>DHCPv4MScope</b>
objects in <b>DHCPv4MScopesList</b> and copy them to the <b>ScopeInfo</b> field
of the <i>MibInfo</i> structure.</p>
</li></ul><p><b>Exceptions Thrown:</b> No exceptions are 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>