Also check out ztk-enchat encrypted server client for a Tk gui version doing chat, in case you want a gui.

These are just my old code, others may have better code examples suited to your purpose. Net::EasyTCP is nice to use, because it lets you have password-protected ports, automatic encryption, and it will stingify hashes for you, so you can actually pass hashes of data through the socket.

I've narrowed it down to a small section:



while ( <$client> ) {
  next unless /\S/;       # blank line
  if    (/quit|exit/i)    { last; }
  elsif (/microsoft/i)    {foreach $command(@commands) {
                           print $client "$command\r";
                              }
                           }
  else                     { last; }
  } continue {
  }
[download]


So, we skip empty lines; if we see "quit/exit", we close the socket, if we see "microsoft", we send a list of commands to the client, and that's where the problem crops up; I know it prints the whole list of commands to the client if the code is left like this, but I want the results of these commands, so I added:

while ( <$client> ) {
  next unless /\S/;       # blank line
  if    (/quit|exit/i)    { last; }
  elsif (/microsoft/i)    {foreach $command(@commands) {
                           print $client "$command\r";
                           while( <$client> ) { print;}
                              }
                           }
  else                     { last; }
  } continue {
  }
[download]

Now, what happens is I get ALL the output from the first command I sent to $client, but the foreach loop is no longer able to iterate through all of "@commands" because I think it's hanging in the "while" loop. I have tried various things like putting "next;" after "print;", but I either get none of the command output, or I get what I want, but only for the first command, and then the client never closes it's connection (I send "exit" as the third command). I am trying to figure out if I'm just coming at this the wrong way (I have put various print statements within the top "while" loop, as well as trying to create an array to which all output would be stored, and then print the array:

while ( <$client> ) {
  while( my @response = <$client>) {
    next unless /\S/;       # blank line
    if    (/quit|exit/i)    { last; }
    elsif (/microsoft/i)    {foreach $command(@commands) {
                             print $client "$command\r";
                               }
                             print @client;
                             }
    else                     { last; }
    } continue {
    }
  }
[download]

None of it is getting the results I want. #######################
Just in case anyone ever runs into this.. I figured it out:

... snip ...
open(LOGFILE,>>"mylog.log") or die "Can't open mylog.log\n";
print $client "$cmds\r";
while( <$client> ) {
   print LOGFILE;
   }
   close $client;
}
[download]

What I wanted to do was print commands to a netcat listener that was setup with "-e cmd.exe" (a la "reverse telnet") and capture all the output to a log file. Print commands to the socket, then do a "while( <$client>)". That seems to get the job done.

Good luck, and thanks for all the input.

Yeah, it's kind of hard for me to get my head around your script, since I'm not running it. That else {last;} line looks suspicious to me, since it's in an if-elsif-else chain. Maybe try to put a next in there instead and see what happens.

But from my experiences with sockets, it sounds like you might be looking for the recv method?. You need to tell the socket to go from sending mode to receive mode. But there are so many different ways to do it, it is hard to say what your problem is with just a code fragment.

$server->recv($data, 1024);
print "received: $data";
[download]

If you can set up a client server script pair, which simply demonstrates your idea, you might want to post it as another new question. You can set them up to just work on localhost. Try to explain what you want the server to do, and what you expect the client to do. If you don't have a clue on how to setup the scripts with pure Perl, just ask, and you will probably get a few pre-made examples. I usually like to working with a forking server and client pair, so that each socket is setup as a one way channel, and you don't need to worry about switching them from send to recv.

Here is a server client pair you might want to look at:

Read more... (3 kB)

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I'm not really a human, but I play one on earth. flash japh

Much thanks brother. I'll check it out.