Mrtg Blast - medindo sua banda disponivel

  Segue um código em perl para se inserir fazer a coleta das informação sobre a banda disponivél em um canal. Segue o código do mrtg-blast.pl , copie e cole em um arquivo de texto com este mesmo nome.

#!/usr/bin/perl ################################################################## # # Copyright (c) 1997 by Balthasar Indermuehle <balthasar@indermuehle.com> # Currently supports Linux 2.0.25 # All Rights Reserved. # # See the file COPYRIGHT in the distribution for the exact terms. # Based on the mrtg-ping-probe script Copyright 1997 by Peter W. Osel <pwo@guug.de> # ################################################################## require 5.003; use Getopt::Std; use File::Basename; use Config; $ProgName = "mrtg-blast"; $Usage = "Usage: $ProgName hostname portnumber packets\nTypically: $ProgName my.host.com 9 500\n"; # Parse Command Line: die $Usage unless getopts(''); if (@ARGV > 3) { print STDERR "$ProgName: WARNING: ignoring but the first three arguments\n"; } if (@ARGV < 3) { print STDERR "$ProgName ERROR:\nPlease enter a hostname port number and packets to blast (e.g. 9 or 21) as argument\n"; print STDERR "$Usage"; exit(1); } ($HostToBlast, $PortToBlast, $Packets) = @ARGV; ($blastres) = blast($HostToBlast, $PortToBlast, $Packets); # The external mrtg probe returns up to 4 lines of output: # 1. Line: current state of the 'incoming bytes counter' # 2. Line: current state of the 'outgoing bytes counter' # 3. Line: string, telling the uptime of the target. # 4. Line: telling the name of the target. # We leave out line 3, and 4. print "$blastres\n$blastres\n"; exit(0); ################################################################## # Do the actual blasting # sub blast { my($host, $port, $packets) = @_; # The following path to tcpblast needs to be adjusted for your system unless (open(BLAST, "/usr/local/mrtg/run/tcpblast -r -t $host $packets -p$port|")) { print STDERR "${ProgName}: FATAL: Can't open tcpblast: $!"; exit(1); } while (<BLAST>) { # Handle output from 'real' tcpblast which looks like this: # 100 KB in 1979 msec = 413946.4 b/s = 51743.3 B/s = 50.5 KB/s close(BLAST), return("$4.$5") if /^(\d+) KB in (\d+) msec = (\d+)\.\d b\/s = (\d+)\.\d B\/s = (\d+)\.\d KB\/s/; } #Could not get blast results, link may be down, return 0 close(BLAST), return(0); }

  Um exemplo em seu arquivo de configuração do mrtg .No Target você especifica o executavel perl,  o host, a porta http e a quantidade de pacotes a serem disparados.
Target[blast.host]: `/etc/mrtg/mrtg-blast host 80 1000` MaxBytes[blast.host]: 12500000 #AbsMax[blast.host]: 12500000 Options[blast.host]: gauge, bits, growright, nopercent Xsize[blast.host]: 600 YLegend[blast.host]: Banda Disponível Title[blast.host]: <h1>host: Banda Total Disponível </H1> PageTop[blast.host]: <h1>Banda Total Disponível</H1>