9 my $greentimeout = 900;
10 my $maxtimeout = $greentimeout*9;
12 my $dbh = nms::db_connect();
14 GD::Image->trueColor(1);
15 $img = GD::Image->new('snmp-bg.png');
17 my $blk = $img->colorResolve(0, 0, 0);
19 $img->string(gdMediumBoldFont,0,0,"TG05 - DHCP-lease status",$blk);
20 $img->string(gdSmallFont,0,20,"Last recieved DHCP-request",$blk);
22 # first 1/5: green (<30 min)
23 # middle 3/5: yellow -> red (30 min - 6 hours)
24 # last 1/5: blue (>6 hours)
25 my $grn = $img->colorResolve(0, 255, 0);
26 my $blu = $img->colorResolve(0, 0, 255);
28 my $l1 = 42 + (236 - 42)/5;
29 my $l2 = 236 - (236 - 42)/5;
31 $img->filledRectangle(32, 42, 53, $l1, $grn);
32 $img->string(gdSmallFont,56,$l1-8,($greentimeout/60)." min",$blk);
34 $img->filledRectangle(32, $l2, 53, 237, $blu);
35 $img->string(gdSmallFont,56,$l2-5,($maxtimeout/60)." min",$blk);
37 for my $y ($l1..$l2) {
38 my $i = 1.0 - ($y - $l1) / ($l2 - $l1);
39 my $clr = get_color($i);
41 $img->filledRectangle(32,$y,53,$y+1,$clr);
44 my $q = $dbh->prepare('select switch,sysname,placement,EXTRACT(EPOCH FROM now() - last_ack) as age from switches natural join placements natural join dhcp');
46 while (my $ref = $q->fetchrow_hashref()) {
47 my $age = $ref->{'age'};
48 if (!defined($age) || $age > $maxtimeout) {
49 $clr = $img->colorResolve(0, 0, 255);
50 } elsif ($age < $greentimeout) {
51 $clr = $img->colorResolve(0, 255, 0);
56 my $intensity = log($age / $greentimeout) / log($maxtimeout/$greentimeout);
57 $clr = get_color(1.0 - $intensity);
60 $_ = $ref->{'sysname'};
61 if (!m/d0/i) { # don't draw distro-switches
62 $ref->{'placement'} =~ /\((\d+),(\d+)\),\((\d+),(\d+)\)/;
63 $img->filledRectangle($3,$4,$1,$2,$clr);
64 $img->rectangle($3,$4,$1,$2,$blk);
66 $img->stringUp(gdSmallFont,$3,$2-3,$ref->{'sysname'},$blk);
71 if (!defined($ARGV[0])) {
72 print $cgi->header(-type=>'image/png',
73 -refresh=>'10; http://nms.tg05.gathering.org/dhcpkart.pl');
78 my $intensity = shift;
80 return $img->colorResolve(255.0, 255.0 * ($intensity ** $gamma), 0);