Hi,

I am trying to fix a little utility i created to diaply the `netstat -an` info and maybe play with that info by i don't know, getting a hostname. The script works fine but it's not working as i expected. Heres the code: 

#! D:\perl\bin\perl
#
# CGI script to display the status of tcp/udp/raw connections on the s
+erver.
# Will give you a warning is there are any SYN'ers.

BEGIN
{
    use strict;
    print "Content-Type: text/plain\n\n";
    use CGI::Carp 'fatalsToBrowser';
    use warnings;
}

&netstat('-an');

sub netstat
{
    my $args = shift;
    my $line;
    my @lines = `netstat $args`;
    print "$0: running \'netstat $args\'\n\n";
    my($prot,$laddr,$lport,$eaddr,$eport,$status,$syn);
    LOOP: foreach $line (@lines)
    {
        $_ = $line;
        next LOOP if /^Active Connections/;
        next LOOP if /^$/;
        next LOOP if /^\s+Proto/;
        if(/^\s+(.*)\s+(.*):(.*)\s+(.*):(.*)\s+(.*)/)
        {
            $prot   = $1;
            $laddr  = $2;
            $lport  = $3;
            $eaddr  = $4;
            $eport  = $5;
            $status = $6;
            $syn = 0;
            if($status =~ /syn/i) { $syn = $status; }
            print "\nwarning: $status! I think we're being SYN'ed\n\n"
+ if $syn;
            print "Local: $laddr:$lport - External: $eaddr:$eport - ",
+$syn || $status,"\n";

        }
    }
}

[download]

All i need to do is clean it up and get rid of the spaces. Heres a sample netstat line from the script: Local: 0.0.0.0:7              - External: 0.0.0.0:0              LISTENING -

And heres one from the netstat command TCP    0.0.0.0:81    *:*    LISTENING

Any pointers and that kinda stuff would be great.

Cheers

Elfyn McBratney

Edit kudra, 2002-06-08 Changed title

In reply to problem with regex to extract netstat info by Anonymous Monk

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