<div class="content"><p> </p><p>The <b>R_DhcpSetOptionInfoV5</b> method modifies the option
definition of a specific option for a specific user class and vendor class at
the default level. If the user class or vendor class is not defined, the option
definition is set or modified for the default user class or vendor class. This
is an extension of <span><a href="82ece643-3c6b-4b33-9832-c3e8caeaebdc" data-linktype="relative-path">R_DhcpSetOptionInfo (section 3.1.4.10)</a></span>,
which sets the option definition for a default user and vendor class.</p><dl>
<dd>
<div><pre> DWORD R_DhcpSetOptionInfoV5(
     [in, unique, string]  DHCP_SRV_HANDLE ServerIpAddress,
     [in]    DWORD Flags,
     [in]    DHCP_OPTION_ID OptionID,
     [in, string, unique]   WCHAR *ClassName,
     [in, string, unique]   WCHAR *VendorName,
     [in]    LPDHCP_OPTION OptionInfo
);
</pre></div>
</dd></dl><p><b>ServerIpAddress: </b>The IP address/host name of
the DHCP server. This parameter is unused.</p><p><b>Flags: </b>This is of type <span><a href="../ms-dtyp/262627d8-3418-4627-9218-4ffe110850b2" data-linktype="relative-path">DWORD</a></span>
that specifies that the option definition is modified for a specific or default
vendor class.</p><dl>
<dd>
<table><thead>
  <tr>
   <th>
   <p>Value</p>
   </th>
   <th>
   <p>Meaning</p>
   </th>
  </tr>
 </thead><tbody><tr>
  <td>
  <p>DHCP_FLAGS_OPTION_DEFAULT</p>
  <p>0x00000000</p>
  </td>
  <td>
  <p>Option definition is modified for a default vendor
  class.</p>
  </td>
 </tr><tr>
  <td>
  <p>DHCP_FLAGS_OPTION_IS_VENDOR</p>
  <p>0x00000003</p>
  </td>
  <td>
  <p>If a bitwise AND operation with this bitmask yields a
  nonzero value, it indicates that the option definition is modified for a
  specific vendor class.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p><b>OptionID: </b>This is of type <span><a href="4a0bb785-ceec-4f7a-b4a7-64555f6e0b62" data-linktype="relative-path">DHCP_OPTION_ID (section 2.2.1.2.3)</a></span>,
containing the option identifier for the option being modified.</p><p><b>ClassName: </b>A pointer to a null-terminated
Unicode string that contains the name of the user class to which the option
definition is modified. This parameter is optional. If the <i>ClassName</i>
parameter is not specified, the option definition is set for the default user
class.</p><p><b>VendorName: </b>A pointer to a null-terminated
Unicode string that contains the name of the vendor class to which the option
definition is modified. This parameter is optional, and if the vendor class is
not specified, the option definition is set for the default vendor class.</p><p><b>OptionInfo: </b>This is a pointer of type <span><a href="855b6a9a-e6e4-4c9d-a732-aadad749ca03" data-linktype="relative-path">DHCP_OPTION (section 2.2.1.2.25)</a></span>,
containing a new option definition for the option being modified.</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 <span><a href="../ms-erref/1bc92ddf-b79e-413c-bbaa-99a5281a6c90" data-linktype="relative-path">[MS-ERREF]</a></span>.
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>
  <p>0x00000000</p>
  <p>ERROR_SUCCESS</p>
  </td>
  <td>
  <p>The call was successful.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x00004E2A</p>
  <p>ERROR_DHCP_OPTION_NOT_PRESENT</p>
  </td>
  <td>
  <p>The specified option definition does not exist on the
  DHCP server database.</p>
  </td>
 </tr><tr>
  <td>
  <p>0x00004E4C</p>
  <p>ERROR_DHCP_CLASS_NOT_FOUND</p>
  </td>
  <td>
  <p>The class name being used is unknown or incorrect.</p>
  </td>
 </tr></tbody></table>
</dd></dl><p>The opnum field value for this method is 15.</p><p>When processing this call, the DHCP server MUST do the
following:</p><ul><li><p><span><span> 
</span></span>Validate if this method is authorized for read/write access per
section <span><a href="38840bd0-0a5a-47ed-bc69-0dd870d33aec" data-linktype="relative-path">3.5.5</a></span>. If not,
return ERROR_ACCESS_DENIED.</p>
</li><li><p><span><span> 
</span></span>The <i>Flags</i> parameter MUST pass one of the validations given
in the <i>Flags</i> field description. Otherwise, the method returns
ERROR_INVALID_PARAMETER.</p>
</li><li><p><span><span> 
</span></span>Validate the <b>DefaultValue</b> data structure, pointed to by
the <i>OptionInfo</i> parameter, by checking that its <b>Elements</b> member is
not NULL and that its <b>NumElements</b> member is not zero. If either check
fails, return ERROR_INVALID_PARAMETER.</p>
</li><li><p><span><span> 
</span></span>If <i>ClassName</i> is not NULL, retrieve the <b>DHCPv4ClassDef</b>
entry corresponding to the <i>ClassName</i> from the server ADM element <b>DHCPv4ClassDefList</b>.
If the <b>DHCPv4ClassDef</b> entry is not found, return
ERROR_DHCP_CLASS_NOT_FOUND. If <i>ClassName</i> is NULL, it refers to the
default vendor class (see section <span><a href="4aa40625-0f9f-4e89-93a4-e4455bc1cc95" data-linktype="relative-path">3.1.1.9</a></span>).</p>
</li><li><p><span><span> 
</span></span>If <i>VendorName</i> is not NULL, retrieve the <b>DHCPv4ClassDef</b>
entry corresponding to the <i>VendorName</i> from the server ADM element <b>DHCPv4ClassDefList</b>.
If the <b>DHCPv4ClassDef</b> entry is not found, return
ERROR_DHCP_CLASS_NOT_FOUND. If <i>VendorName</i> is NULL, it refers to the
default vendor class (see section 3.1.1.9).</p>
</li><li><p><span><span> 
</span></span>Iterate through the server ADM element <b>DHCPv4OptionDefList</b>
and retrieve <b>DHCPv4OptionDef.DHCPv4ClassedOptDefList</b> corresponding to
the user and vendor class specified by <i>ClassName</i> and <i>VendorName</i>
respectively. If <i>ClassName</i> or <i>VendorName</i> is NULL, it refers to the
default user class or vendor class respectively, as specified in section
3.1.1.9. If there is no <b>DHCPv4OptionDef</b> entry corresponding to the
specified user and vendor classes, return ERROR_DHCP_CLASS_NOT_FOUND. Iterate
through <b>DHCPv4ClassedOptDefList</b> and if there is no <b>DHCPv4ClassedOptDef</b>
entry corresponding to the <i>OptionID</i> parameter, return
ERROR_DHCP_OPTION_NOT_PRESENT.</p>
</li><li><p><span><span> 
</span></span>Modify the retrieved <b>DHCPv4ClassedOptDef</b> entry with
information in <i>OptionInfo</i>, and return ERROR_SUCCESS.</p>
</li></ul><p><b>Exceptions Thrown:</b> No exceptions are thrown beyond
those thrown by the underlying RPC protocol <span><a href="../ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15" data-linktype="relative-path">[MS-RPCE]</a></span>.</p></div>