<p>
<!-- Created: Sun Dec 13 20:25:14 GMT 1998 -->
<!-- hhmts start -->
-Last modified: Sun Sep 2 21:12:19 BST 2001
+Last modified: Sun Sep 2 22:02:36 BST 2001
<!-- hhmts end -->
<p>At the moment, anybody can connect inwards at any time from outside, either by ax25 or by
telnet (assuming you have followed the instructions in <a href="install.html">installation</a>
<span class=cmd>abort (Busy|Sorry|Fail)</span>
# don't forget to chmod 4775 netrom_call!
<span class=connect>connect ax25 /usr/sbin/netrom_call bbs gb7djk-0 g1tlh-0</span>
- <span class=expect>'Connected'</span> <span class=send>''</span>
<span class=expect>'Connected'</span> <span class=send>'c np7'</span>
<span class=expect>'*** Connect'</span> <span class=send>'c gb7dxm'</span>
<span class=expect>'Connect'</span> <span class=send>''</span>
<p>The <tt>-0</tt> ssid is important if you want it to work reliably. Obviously if you are
using a different ssid then you would use that. You can use the Netrom alias instead if it
- it is in the machines node table</p>
+ it is in the machines node table.</p>
- <p>A AGW Engine example would be very similar and look like this:-</p>
+ <p>The line: "<tt><span class=expect>'Connected'</span> <span class=send>''</span></tt>" means: wait for
+ the string <span class=expect>Connected</span> and when that is seen, then move onto the next line
+ <b>without <span class=send>sending</span> anything</b>. The reason you do this (in this case) is to wait
+ for the final "connect" string from the BPQ node that directly connects you to the
+ cluster node itself.</p>
+
+ <p>An AGW Engine example would be very similar and look like this:-</p>
<pre>
<span class=cmd>timeout 60</span>
<span class=cmd>abort (Busy|Sorry|Fail)</span>
<span class=connect>connect agw 2 g1tlh</span>
- <span class=expect>'*** Connected'</span> <span class=send>''</span>
<span class=expect>'*** Connect'</span> <span class=send>'c np7'</span>
<span class=expect>'Connected'</span> <span class=send>'c gb7dxm'</span>
<span class=expect>'Connect'</span> <span class=send>''</span>
route that you are going to take to the destination, so this will be typically the callsign
of your local node.</p>
- <p>You will notice that the script waits until it sees the left hand string
- of the pair and <b>only then</b> does it send the,
- string on the right
- hand side. This is called a <i>State Machine</i>.</p>
-
- <p>A <i>state machine</i> "walks" through a conversation (in this case) looking
- for "states" (in this case particular strings) and then performs some
- "action" (usually some kind of connect command for the type of system
- you are trying to navigate). When one "state" "fires" (detects the string
- are looking for), it sends the command associated with that state and then
- moves onto the next "state", in our case: the next line.</p>
+ <p>You will notice that the script <span class=expect>waits</span>
+ until it sees the left hand string of the pair and <b>only
+ then</b> does it <span class=send>send</span> the string on the
+ right hand side. This is called a <i>State Machine</i>.</p>
+
+ <p>A <i>state machine</i> "walks" through a conversation (in this
+ case) looking for "<span class=expect>states</span>" (in this case
+ particular strings) and then performs some "<span
+ class=send>action</span>" (usually some kind of connect command
+ for the type of system you are trying to navigate). When one
+ "<span class=expect>state</span>" "fires"
+ (detects the string are looking for), it <span class=send>sends the command</span>
+ associated with that state and then moves onto the next "<span
+ class=expect>state</span>", in our case: the next line.</p>
<p><b>PLEASE NOTE</b>: the colouration in the above example is for illustrative purposes
only, the debug output is all one colour.</p>
ignored, as are wholly blank lines.
<br><br>
- <li><b>timeout</b> followed by a number is the number of
+ <li><b><span class=cmd>timeout</span></b> followed by a number is the number of
seconds to wait for a command to complete. If there is no
- <b>timeout</b> specified in the script then the default is 60
+ <b><span class=cmd>timeout</span></b> specified in the script then the default is 60
seconds.
<br><br>
- <li><b>abort</b> is a regular expression containing one or
+ <li><b><span class=cmd>abort</span></b> is a regular expression containing one or
more strings to look for to abort a connection. This is a perl
regular expression and is executed ignoring case.
<br><br>
- <li><b>connect</b> followed by <b>ax25</b>, <b>telnet</b> or <b>agw</b>
+ <li><b><span class=connect>connect</span></b> followed by <b>ax25</b>, <b>telnet</b> or <b>agw</b>
and some type dependent information.
<p>In the case of a
from 1) and the callsign of the first "hop" along the way.
<br><br>
- <li><b>'</b> is the delimiting character for a word or
- phrase of an expect/send line in a <tt>chat</tt> type
- script. The words/phrases normally come in pairs, either can
- be empty. Each line reads input from the connection until it
- sees the string (or perl regular expression) contained in the
- left hand string. If the left hand string is empty then it
- doesn't read or wait for anything. The comparison is done
- ignoring case.
+ <li><b>'</b> is the delimiting character for a word or phrase
+ of an <span class=expect>expect</span>/<span
+ class=send>send</span> line. The words/phrases normally come
+ in pairs, but either can be empty. Each line reads input from
+ the connection until it sees the string (or perl regular
+ expression) that
+ is contained in the left hand string. If the left hand
+ string is empty then it doesn't read or wait for anything. The
+ comparison is done ignoring case.
+
+ <p>When the left hand string has found what it is <span class=expect>expecting</span> (if
+ it is) then the right hand string is <span class=send>sent</span> to the connection.
- <p>When the left hand string has found what it is looking (if
- it is) then the right hand string is sent to the connection.
+ <p>If the right hand string is empty ('') then nothing is <span class=send>sent</span>, the
+ script simply moves onto the next line.</P>
<p>This process is repeated for every line of <tt>chat</tt> script.
<br><br>
- <li><b>client</b> starts the connection, put the arguments
+ <li><b><span class=cmd>client</span></b> starts the connection, put the arguments
you would want here if you were starting the client program
manually. You only need this if the script has a different
name to the callsign you are trying to connect to (i.e. you
projects / spider.git / blobdiff