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<p dir="ltr" style="margin-right: 0px" align="center"><font size="5"><b>Q
Algorithm<br>
</b></font>
<!--webbot bot="Navigation" S-Type="sequence" S-Orientation="horizontal" S-Rendering="graphics" B-Include-Home="FALSE" B-Include-Up="FALSE" U-Page="sid:1100" startspan --><nobr>[ <a href="q.htm" target="">Construct</a> ]</nobr> <nobr>[ Algorithm ]</nobr><!--webbot bot="Navigation" i-checksum="15504" endspan --></p>
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<p dir="ltr" style="MARGIN-RIGHT: 0px"><font face="Arial" size="2">All packets:<br>
{<br>
If there is a q construct in the path:<br>
Skip to "All packets with q constructs"</font></p>
<p dir="ltr" style="MARGIN-RIGHT: 0px"><font face="Arial" size="2"> If the
packet entered the server from an UDP port:<br>
{<br>
Append ,qAU,SERVERLOGIN<br>
Quit q processing<br>
}</font></p>
<p dir="ltr" style="MARGIN-RIGHT: 0px"><font face="Arial" size="2"> If the
packet entered the server from an unverified connection and has been converted
to TCPXX format (per current validation algorithm):<br>
{<br>
(All packets not deemed "OK" from an unverified connection should never
make it here.)<br>
Append ,qAX,FROMCALL<br>
Skip to "All packets with q constructs"<br>
}</font></p>
<p dir="ltr" style="MARGIN-RIGHT: 0px"><font face="Arial"><font size="2"> If
packet entered the server from a verified connection:<br>
{<br>
<font color="#ff00ff"> If header is terminated with ,I:<br>
</font></font><font color="#ff00ff" size="2"> {<br>
If the VIACALL preceding the ,I matches the login:</font></font><br>
<font size="2" face="Arial"><font color="#ff00ff"> Change from ,VIACALL,I
to ,qAR,VIACALL<br>
Else<br>
Change from ,VIACALL,I to ,qAr,VIACALL<br>
}<br>
</font> Else If the FROMCALL matches the login:<br>
Append ,qAC,FROMCALL<br>
Else<br>
Append ,qAS,login<br>
Skip to "All packets with q constructs"<br>
}</font></p>
<p dir="ltr" style="MARGIN-RIGHT: 0px"><font face="Arial" size="2"> If packet
entered the server from an outbound connection (to another server's port 1313,
for instance):<br>
{<br>
</font><font face="Arial" color="#ff00ff" size="2"> If header is
terminated with ,I:<br>
Change from ,VIACALL,I to ,qAr,VIACALL<br>
</font><font size="2" face="Arial"><font color="#ff00ff">Else<br>
</font><font color="#ff0000"> </font><font color="#00FF00">Append ,qAS,IPADDR
(IPADDR is an 8 character hex representation of the IP address of the remote
server)<br>
</font> }<br>
}</font></p>
<p dir="ltr" style="MARGIN-RIGHT: 0px"><font face="Arial" size="2">All packets
with q constructs:<br>
{<br>
if ,qAZ, is the q construct:<br>
{<br>
Dump to the packet to the reject log<br>
Quit processing the packet<br>
}</font></p>
<p dir="ltr" style="MARGIN-RIGHT: 0px"><font face="Arial" size="2"> If ,SERVERLOGIN or IGATECALL
is found after the q construct:<br>
{</font><font size="+0"><br>
</font><font face="Arial" size="2"> Dump to the loop log with the
sender's IP address for identification<br>
Quit processing the packet<br>
}</font></p>
<p dir="ltr" style="MARGIN-RIGHT: 0px"><font face="Arial" size="2"> If the
packet is from a verified port and the login is found after the q construct but
is not the LAST VIACALL:<br>
{<br>
Dump to the loop log with the sender's IP address for identification<br>
Quit processing the packet<br>
}</font></p>
<p dir="ltr" style="MARGIN-RIGHT: 0px"><font size="2" face="Arial"> If trace
is on, the q construct is qAI<font color="#0000FF">, or the FROMCALL is on the
server's trace list</font>:<br>
{<br>
If the packet is from a verified port where the login is not found after
the q construct:<br>
Append ,login<br>
Append ,SERVERLOGIN<br>
}<br>
}</font></p>
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