<div class="content" name="NETLOGON_LOGON_QUERY" uuid="a59c047b-4e70-4ad4-b1a4-febe37f6383b"><p>The format of a <span><a href="b645c125-a7da-4097-84a1-2fa7cea07714#gt_0a5fd868-ff77-4beb-838e-79f98cbe3898" data-linktype="relative-path">mailslot ping</a></span> as
documented in section <span><a href="2cff75a9-5871-4493-a704-017b506f8df0" data-linktype="relative-path">6.3.5</a></span>. This can be
used if a <span><a href="b645c125-a7da-4097-84a1-2fa7cea07714#gt_663cb13a-8b75-477f-b6e1-bea8f2fba64d" data-linktype="relative-path">PDC</a></span> is required.</p><table>
 <tbody><tr>
  <th><p><br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>1<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>2<br/>0</p></th>
  <th><p><br/>1</p></th>
  <th><p><br/>2</p></th>
  <th><p><br/>3</p></th>
  <th><p><br/>4</p></th>
  <th><p><br/>5</p></th>
  <th><p><br/>6</p></th>
  <th><p><br/>7</p></th>
  <th><p><br/>8</p></th>
  <th><p><br/>9</p></th>
  <th><p>3<br/>0</p></th>
  <th><p><br/>1</p></th>
 </tr>
 <tr>
  <td colspan="16">Opcode</td>
  <td colspan="16">ComputerName (variable)</td>
 </tr>
 <tr>
  <td colspan="32">...</td>
 </tr>
 <tr>
  <td colspan="32">MailslotName (variable)</td>
 </tr>
 <tr>
  <td colspan="32">...</td>
 </tr>
 <tr>
  <td colspan="32">UnicodeComputerName (variable)</td>
 </tr>
 <tr>
  <td colspan="32">...</td>
 </tr>
 <tr>
  <td colspan="32">NtVersion</td>
 </tr>
 <tr>
  <td colspan="16">LmNtToken</td>
  <td colspan="16">Lm20Token</td>
 </tr>
</tbody></table><p><b>Opcode (2 bytes): </b>Operation code (see section <span><a href="07133ff2-a9a3-4aa9-8896-a7dcb53bdfe9" data-linktype="relative-path">6.3.1.3</a></span>).
Set to LOGON_PRIMARY_QUERY.</p><p><b>ComputerName (variable): </b>Null-terminated ASCII
value of the <span><a href="b645c125-a7da-4097-84a1-2fa7cea07714#gt_b86c44e6-57df-4c48-8163-5e3fa7bdcff4" data-linktype="relative-path">NetBIOS</a></span> name of the
client. This field SHOULD contain at least one character: the null terminator.</p><p><b>MailslotName (variable): </b>Null-terminated ASCII
value of the name of the <span><a href="b645c125-a7da-4097-84a1-2fa7cea07714#gt_f53fe4b9-8e1d-4366-9254-3c4f73269e78" data-linktype="relative-path">mailslot</a></span> on which
the client listens. This field is always aligned to an even byte boundary, with
padding (bytes of value 0) to the next even byte boundary as necessary.</p><p><b>UnicodeComputerName (variable): </b>Null-terminated
<span><a href="b645c125-a7da-4097-84a1-2fa7cea07714#gt_c305d0ab-8b94-461a-bd76-13b40cb8c4d8" data-linktype="relative-path">Unicode</a></span>
value of the NetBIOS name of the client. This field SHOULD contain at least one
character: the null terminator. Each Unicode value is encoded as 2 bytes.</p><p><b>NtVersion (4 bytes): </b>NETLOGON_NT_VERSION
options (see <span><a href="8e6a9efa-6312-44e2-af12-06ad73afbfa5" data-linktype="relative-path">6.3.1.1</a></span>).</p><p><b>LmNtToken (2 bytes): </b>This MUST be set to
0xFFFF.</p><p><b>Lm20Token (2 bytes): </b>This MUST be set to
0xFFFF.</p><p><b>Note</b>  All multibyte quantities are
represented in little-endian byte order.</p></div>