#!/etc/Tivoli/bin/perl
#
# Quick and dirty script to determine who is running Tivoli agents, and who is not.
#
# Any questions, problems, complaints...
# Written by Michael. A. Gumienny
#

sub connected_to
        {
        local($host) = @_;
        if (!socket(S,2,1,6)) { return 0; }
        if (!connect(S,pack('Sna4x8',2,6543,pack('C4',split('\.',$host))))) { return 0; }
        return 1;
        }

sub can_ping
        {
        local($host) = @_;
        open (CMD, "ping -c 1 $host |");
                while (<CMD>)
                { if ($_ =~ "100% packet loss") { close(CMD); return 0; } }
        close(CMD);
        return 1;
        }

if ($#ARGV==-1)
        {
        printf("Usage: $0 IP_File_List [Agent File] [No Agent File] [Errors]\n");
        printf("\tIP_File_List must contain a list of valid IP address to test for Tivoli agent installations.\n");
        printf("\tThe 'Agent File' will be a generated listing that contains the IPs that are listening to Tivoli.\n");
        printf("\tThe 'No Agent File' is a generated list of IPs that are not running Tivoli or have it turned off.\n");
        printf("\tThe 'errors' file will contain any problems encountered while scanning.\n");
        exit;
        }

$IPList = shift(@ARGV);
$AGFile = shift(@ARGV);
$NAFile = shift(@ARGV);
$ERFile = shift(@ARGV);

open(IPs, "< $IPList") || die "Can't find IP file list '$IPList'\n";

if($AGFile) { open(AGFILE, "> $AGFile") || die "Can't write to $AGFile\n"; }
if($NAFile) { open(NAFILE, "> $NAFile") || die "Can't write to $NAFile\n"; }
if($ERFile) { open(ERFILE, "> $ERFile") || die "Can't write to $ERFile\n"; }

while(<IPs>)
        {
        chop;
        $host = $_;
        # Ensure that the destination is online before attempting to establish connection...
        if(&can_ping($host))
                {
                if (&connected_to($host))
                        {
                        if($AGFile) { printf(AGFILE "$host\n"); }
                        printf("$host Tivoli agent running.\n");
                        }
                else
                        {
                        if($NAFile) { printf(NAFILE "$host\n"); }
                        printf("$host *** Is not listening to Tivoli ***\n");
                        }
                }
        else
                {
                if($ERFile) { printf(ERFILE "$host\n"); }
                printf("$host *** Is not online ***\n");
                }
        }

if($AGFile) { close(AGFILE); }
if($NAFile) { close(NAFILE); }
if($ERFile) { close(ERFILE); }