9 my $dbh = nms::db_connect();
11 GD::Image->trueColor(1);
12 $img = GD::Image->new('snmp-bg.png');
14 my $blk = $img->colorResolve(0, 0, 0);
17 my $i = 2.0 * ($y - 236.0) / (42.0 - 237.0);
18 my $clr = get_color($i);
20 $img->filledRectangle(32,$y,53,$y+1,$clr);
23 my $q = $dbh->prepare('select * from switches natural join placements natural left join
24 ( select switch,sum(bytes_in)/count(*) as
25 bytes_in,sum(bytes_out)/count(*) as bytes_out from get_datarate() group
26 by switch ) t1 where ip<>\'127.0.0.1\'');
28 while (my $ref = $q->fetchrow_hashref()) {
31 # 100kbit/port = all green
32 # 1gbit/port = all red
36 if (defined($ref->{'bytes_in'})) {
38 my $traffic = 4.0 * $ref->{'bytes_in'} + $ref->{'bytes_out'}; # average and convert to bits (should be about the same in practice)
40 my $max = 20_000_000.0; # 10mbit
41 my $min = 100_000.0; # 100kbit
42 if ($traffic >= $min) {
43 $intensity = 2.0 * (log($traffic / $min) / log(10)) / (log($max / $min) / log(10));
44 $intensity = 2.0 if ($intensity > 2.0);
46 $clr = get_color($intensity);
48 $clr = $img->colorResolve(0, 0, 255);
51 $ref->{'placement'} =~ /\((\d+),(\d+)\),\((\d+),(\d+)\)/;
52 $img->filledRectangle($3,$4,$1,$2,$clr);
53 $img->rectangle($3,$4,$1,$2,$blk);
54 $img->stringUp(gdSmallFont,$3,$2-3,$ref->{'sysname'},$blk);
58 print $cgi->header(-type=>'image/png');
62 my $intensity = shift;
64 if ($intensity > 1.0) {
65 return $img->colorResolve(255.0, 255.0 * ((2.0 - $intensity) ** $gamma), 0);
67 return $img->colorResolve(255.0 * ($intensity ** $gamma), 255, 0);