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-<HTML>
-<HEAD>
-   <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
-   <META NAME="Author" CONTENT="James CE Johnson">
-   <TITLE>ACE Tutorial 015</TITLE>
-</HEAD>
-<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#000FFF" VLINK="#FF0F0F">
-
-<CENTER><B><FONT SIZE=+2>ACE Tutorial 015</FONT></B></CENTER>
-
-<CENTER><B><FONT SIZE=+2>Building a protocol stream</FONT></B></CENTER>
-
-<P>
-<HR WIDTH="100%">
-While I might be able to come up with a competitive compressor, I
-don't have a snowball's chance to code up encryption.  I'd be better
-off piping the data through the standard Unix crypt command.
-<P>
-So, while I was lazy with Compress, I'm realistic with Crypt.  I'll
-show you the hooks and entry points and let someone else contribute an 
-encryptor.
-<HR>
-<PRE>
-
-<font color=red>// $Id$</font>
-
-<font color=blue>#ifndef</font> <font color=purple>CRYPT_H</font>
-<font color=blue>#define</font> <font color=purple>CRYPT_h</font>
-
-<font color=blue>#include</font> "<font color=green>Protocol_Task.h</font>"
-
-<font color=red>/* An interface (adaptor) between your favorite encryption method and
-   an ACE_Stream.
-*/</font>
-class Crypt : public Protocol_Task
-{
-public:
-
-    typedef Protocol_Task inherited;
-
-        <font color=red>// Again we have the option of multiple threads and again I</font>
-        <font color=red>// regret tempting folks to use it.</font>
-    Crypt( int _thr_count = 0 );
-
-    ~Crypt(void);
-
-protected:
-
-        <font color=red>// Moving downstream will encrypt the data</font>
-     int send(ACE_Message_Block *message,
-              ACE_Time_Value *timeout);
-
-        <font color=red>// And moving upstream will decrypt it.</font>
-     int recv(ACE_Message_Block *message,
-              ACE_Time_Value *timeout);
-};
-
-<font color=blue>#endif</font> <font color=red>// CRYPT_H</font>
-</PRE>
-<P><HR WIDTH="100%">
-<CENTER>[<A HREF="..">Tutorial Index</A>] [<A HREF="page21.html">Continue This Tutorial</A>]</CENTER>