<p>
<!-- Created: Sun Dec 13 20:25:14 GMT 1998 -->
<!-- hhmts start -->
-Last modified: Tue Apr 10 00:21:34 BST 2001
+Last modified: Sun Sep 2 20:45:56 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>
<p><em>Connect</em> scripts live in the <tt>/spider/connect</tt> directory and are simple ascii scripts
that are written using a normal editor. There are a couple of examples in the issue directory.
-
- <p>Here are a few of basic types, first a telnet connection where the
- client is set up in the passwd file thus:-
- <pre>
- gb7djk:x:1372:1291::/home/gb7djk:/usr/bin/perl /spider/perl/client.pl gb7djk telnet
- </pre>
- and the connect script would be:-
+
+ <p>The first example is a simple telnet (TCP/IP) connect to port 7000 of WR3D (this will actually
+ work if you have or make an arrangement to connect to WR3D)[oh, and substitute x1xxx for your real
+ node callsign].</p>
+
<pre>
timeout 15
# this is a comment
- connect telnet dirkl.tobit.co.uk
- 'login' 'gb7djk'
- 'word' 'gb7djk'
- client gb7djk telnet
+ connect telnet wr3d.dxcluster.net 7000
+ 'login' 'x1xxx'
+ client wr3d telnet
</pre>
+
<p>For a connect that requires a login and execution of the programs
- from a normal shell, do:-
+ from a normal shell, do:-</p>
<pre>
timeout 15
client gb7djk telnet
</pre>
- <p>a ax25 example:-
+ <p>a ax25 example (connecting from GB7DJK, to GB7DXM via my local BPQ node and one X1J intermediate node):-
<pre>
timeout 60
abort (Busy|Sorry|Fail)
# don't forget to chmod 4775 netrom_call!
connect ax25 /usr/sbin/netrom_call bbs gb7djk-0 g1tlh-0
- 'Connect' ''
- 'Connect' 'c np7'
- 'Connect' 'c gb7dxm'
+ 'Connected' ''
+ 'Connected' 'c np7'
+ '*** Connect' 'c gb7dxm'
'Connect' ''
</pre>
- 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.
+ <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>
+
+ <p>A AGW Engine example would be very similar and look like this:-</p>
- <p>A AGW Engine example would be very similar and look like this:-
<pre>
timeout 60
abort (Busy|Sorry|Fail)
connect agw 2 g1tlh
- 'Connect' ''
- 'Connect' 'c np7'
- 'Connect' 'c gb7dxm'
+ '*** Connected' ''
+ '*** Connect' 'c np7'
+ 'linked to' 'c gb7dxm'
'Connect' ''
</pre>
<p>A connection is started manually by typing in <tt>connect <scriptname></tt> on a sysop enabled
- <tt>client.pl</tt> session. For example:-
+ <tt>client.pl</tt> session. For example:-</p>
+
<pre>
G1TLH de GB7DJK 13-Dec-1998 2041Z > connect gb7djk-1
connection to GB7DJK-1 started
G1TLH de GB7DJK 13-Dec-1998 2043Z >
</pre>
+ <p>Consider the following specific example, it is located in the file <tt>/spider/connect/gb7djk-1</tt> :-</p>
+
+ <pre>
+ <span class=cmd>timeout 15</span>
+ <span class=cmd>connect telnet dirkl.tobit.co.uk</span>
+ <span class=expect>'login'</span> <span class=send>'gb7djk'</span>
+ <span class=expect>'ssword'</span> <span class=send>'gb7djk'</span>
+ </pre>
+
<p>You can watch the progress of the connection (if you have <tt>connect</tt>
debugging enabled [<tt>set/debug connect</tt>]) on the
- <tt>cluster.pl</tt> screen and you should see something like this:-
+ <tt>cluster.pl</tt> screen and you should see something like this:-</p>
+
<pre>
<- D G1TLH connect gb7djk-1
-> D G1TLH connection to GB7DJK-1 started
-> D G1TLH G1TLH de GB7DJK 13-Dec-1998 2046Z >
- timeout set to 15
- CONNECT sort: telnet command: dirkl.tobit.co.uk
+ <span class=cmd>timeout set to 15</span>
+ <span class=cmd>CONNECT sort: telnet command: dirkl.tobit.co.uk</span>
CHAT "login" -> "gb7djk"
received "
Red Hat Linux release 5.1 (Manhattan)
Kernel 2.0.35 on an i586
"
- received "login: "
- sent "gb7djk"
+ <span class=expect>received "login: "</span>
+ <span class=send>sent "gb7djk"</span>
CHAT "word" -> "gb7djk"
received "gb7djk
"
- received "Password: "
- sent "gb7djk"
+ <span class=expect>received "Password: "</span>
+ <span class=send>sent "gb7djk"</span>
Connected to GB7DJK-1, starting normal protocol
<- O GB7DJK-1 telnet
-> B GB7DJK-1 0
<- D GB7DJK-1 PC18^ 1 nodes, 0 local / 1 total users Max users 0 Uptime 0 00:00^5447^~
etc
</pre>
-
+
+ <p>I have coloured the commands in an attempt to make it clear as to what goes on, where and why.
+ <span class=cmd>These coloured lines are miscellaneous commands</span>, the <span class=expect>things
+ that are this colour are the strings I am looking for (what I am "expecting")</span>
+ and the <span class=send>things that are this colour
+ are the commands I am going to send when I see the "expect" strings in the input</span>.</p>
+
+ <p>The script starts by setting the timeout to 15 seconds, then starts
+ the connection. It is <b>important</b> to note that, in the case of
+ an ax25 connection (usually) this will be the callsign of the <i>first hop</i> along the
+ 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><b>PLEASE NOTE</b>: the colouration in the above example is for illustrative purposes
+ only, the debug output is all one colour.</p>
+
<p>The connect scripts consist of lines which start with the
- following keywords or symbols:-
+ following keywords or symbols:-</p>
<ul>
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- <font color="#FF0000" size=-2>
- Copyright © 1998 by Dirk Koopman G1TLH. All Rights Reserved<br>
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+ <span class=copy>Copyright © 1998 by Dirk Koopman G1TLH. All Rights Reserved</span><br>
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