request.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32(8)</term>
       <listitem>
        <para>
         Length of message contents in bytes, including self.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32(2)</term>
       <listitem>
        <para>
         Specifies that Kerberos V5 authentication is required.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>
    </listitem>
   </varlistentry>

   <varlistentry id="protocol-message-formats-AuthenticationCleartextPassword">
    <term>AuthenticationCleartextPassword (B)</term>
    <listitem>

     <variablelist>
      <varlistentry>
       <term>Byte1('R')</term>
       <listitem>
        <para>
         Identifies the message as an authentication request.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32(8)</term>
       <listitem>
        <para>
         Length of message contents in bytes, including self.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32(3)</term>
       <listitem>
        <para>
         Specifies that a clear-text password is required.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>
    </listitem>
   </varlistentry>

   <varlistentry id="protocol-message-formats-AuthenticationMD5Password">
    <term>AuthenticationMD5Password (B)</term>
    <listitem>
     <variablelist>
      <varlistentry>
       <term>Byte1('R')</term>
       <listitem>
        <para>
         Identifies the message as an authentication request.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32(12)</term>
       <listitem>
        <para>
         Length of message contents in bytes, including self.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32(5)</term>
       <listitem>
        <para>
         Specifies that an MD5-encrypted password is required.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Byte4</term>
       <listitem>
        <para>
         The salt to use when encrypting the password.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>
    </listitem>
   </varlistentry>

   <varlistentry id="protocol-message-formats-AuthenticationGSS">
    <term>AuthenticationGSS (B)</term>
    <listitem>
     <variablelist>
      <varlistentry>
       <term>Byte1('R')</term>
       <listitem>
        <para>
         Identifies the message as an authentication request.
        </para>
       </listitem>
      </varlistentry>
      <varlistentry>
       <term>Int32(8)</term>
       <listitem>
        <para>
         Length of message contents in bytes, including self.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32(7)</term>
       <listitem>
        <para>
         Specifies that GSSAPI authentication is required.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>
    </listitem>
   </varlistentry>

   <varlistentry id="protocol-message-formats-AuthenticationGSSContinue">
    <term>AuthenticationGSSContinue (B)</term>
    <listitem>
     <variablelist>
      <varlistentry>
       <term>Byte1('R')</term>
       <listitem>
        <para>
         Identifies the message as an authentication request.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32</term>
       <listitem>
        <para>
         Length of message contents in bytes, including self.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Int32(8)</term>
       <listitem>
        <para>
         Specifies that this message contains GSSAPI or SSPI data.
        </para>
       </listitem>
      </varlistentry>

      <varlistentry>
       <term>Byte<replaceable>n</replaceable></term>