<div class="content"><p align="right"><a href="https://msdn.microsoft.com/en-us/library/dc0aa410-a7dc-4b6b-bab3-844f58969c80" data-linktype="external">msdn link</a></p><p>The NETLOGON_PRIMARY_RESPONSE structure is the <a href="b645c125-a7da-4097-84a1-2fa7cea07714#gt_663cb13a-8b75-477f-b6e1-bea8f2fba64d" data-linktype="relative-path">PDC</a> server&#39;s response to a <a href="b645c125-a7da-4097-84a1-2fa7cea07714#gt_0a5fd868-ff77-4beb-838e-79f98cbe3898" data-linktype="relative-path">mailslot ping</a> (section <a href="2cff75a9-5871-4493-a704-017b506f8df0" data-linktype="relative-path">6.3.5</a>).</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">
  <p>Opcode</p>
  </td>
  <td colspan="16">
  <p>PrimaryDCName (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>UnicodePrimaryDCName (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>UnicodeDomainName (variable)</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>...</p>
  </td>
 </tr>
 <tr>
  <td colspan="32">
  <p>NtVersion</p>
  </td>
 </tr>
 <tr>
  <td colspan="16">
  <p>LmNtToken</p>
  </td>
  <td colspan="16">
  <p>Lm20Token</p>
  </td>
 </tr>
</tbody></table><p><b>Opcode (2 bytes): </b>Operation code (see section <a href="07133ff2-a9a3-4aa9-8896-a7dcb53bdfe9" data-linktype="relative-path">6.3.1.3</a>). Set to
LOGON_PRIMARY_RESPONSE.</p><p><b>PrimaryDCName (variable): </b>Null-terminated ASCII
value of the <a href="b645c125-a7da-4097-84a1-2fa7cea07714#gt_b86c44e6-57df-4c48-8163-5e3fa7bdcff4" data-linktype="relative-path">NetBIOS</a>
name of the server. This field SHOULD contain at least one character: the null
terminator.</p><p><b>UnicodePrimaryDCName (variable): </b>Null-terminated
<a href="b645c125-a7da-4097-84a1-2fa7cea07714#gt_c305d0ab-8b94-461a-bd76-13b40cb8c4d8" data-linktype="relative-path">Unicode</a> value of the
NetBIOS name of the server. This field SHOULD contain at least one character:
the null terminator. Each Unicode value is encoded as 2 bytes. 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>UnicodeDomainName (variable): </b>Null-terminated
Unicode value of the NetBIOS name of the <a href="b645c125-a7da-4097-84a1-2fa7cea07714#gt_784c7cce-f782-48d8-9444-c9030ba86942" data-linktype="relative-path">NC</a>. This field MUST 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 section <a href="8e6a9efa-6312-44e2-af12-06ad73afbfa5" data-linktype="relative-path">6.3.1.1</a>).</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>