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Andrew Tomaka 2013-02-23 13:16:08 -05:00
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README.md Normal file
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#Misc Linux Tools
Miscellaneous tools used at the Linux command line.
##pinger
Tool to imcp ping an IP or range of IPs and return which ones are reacable.
```
$ sudo pinger -h
```

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pinger Executable file
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#!/usr/bin/env perl
use strict;
use Net::Ping;
use POSIX;
use Time::HiRes qw/time/;
if($> != 0) {
die("pinger must be run as root\n");
}
my $alive = 1;
my $time = 0;
my($start,$finish);
while($ARGV[0] =~ /\-/) {
my $arg = shift(@ARGV);
$arg =~ s/-//;
my @switches = split('', $arg);
foreach my $switch (@switches) {
if($switch eq "d") {
$alive = 0;
} elsif($switch eq "r") {
$alive = 1;
} elsif($switch eq "t") {
$time = 1;
} elsif($switch eq "h") {
help();
} else {
print "pinger: invalid option -- '$switch'\n";
help();
}
}
}
if(scalar(@ARGV) < 1 || scalar(@ARGV) > 2) {
die("Usage: pinger START_IP [END_IP]\n");
}
$start = time if($time);
my $p = Net::Ping->new('icmp');
my @ips;
if(scalar(@ARGV) == 2) {
# must be IP addresses
if($ARGV[0] !~ /((?:\d{1,3}\.){3}\d{1,3})/ || $ARGV[1] !~ /((?:\d{1,3}\.){3}\d{1,3})/) {
die("Both arguments must be IP addresses if two are specified.\n");
}
# and only the final octet should differ
my @ip1 = split(/\./, $ARGV[0]);
my @ip2 = split(/\./, $ARGV[1]);
if($ip1[0] != $ip2[0] || $ip1[1] != $ip2[1] || $ip1[2] != $ip2[2]) {
die("The first three octets of the IP addresses must match.\n")
}
my $baseIp = $ip1[0] . '.' . $ip1[1] . '.' . $ip1[2];
my $start = $ip1[3];
my $end = $ip2[3];
my $count = $ip2[3] - $ip1[3] + 1;
for(my $i = $start, my $k = 1; $i <= $end; $i++, $k++) {
$| = 1;
progressBar($k, $count);
my $ip = $baseIp . '.' . $i;
push(@ips, $ip) if($p->ping($ip, 1) == $alive);
}
} elsif(scalar(@ARGV) == 1) {
my $host = $ARGV[0];
push(@ips, $host) if($p->ping($host, 1) == $alive);
}
$p->close();
$finish = time if($time);
print "\n";
($alive) ? print "Reachable:\n" : print "Dead:\n";
print join(", ", @ips);
print "\n\n";
if($time) {
my $completed = $finish - $start;
printf("Completed in %.2f seconds.\n", $completed);
}
# details from http://stackoverflow.com/questions/1782107/how-do-i-retrieve-the-terminal-width-in-perl
sub findTerminalWidth {
my($winsize, $row, $col, $xpixel, $ypixel);
my $available = 1;
require 'sys/ioctl.ph';
$available = 0 unless defined &TIOCGWINSZ;
open(TTY, "+</dev/tty") or $available = 0;
unless (ioctl(TTY, &TIOCGWINSZ, $winsize = '')) {
$available = 0;
}
if($available == 1) {
($row, $col, $xpixel, $ypixel) = unpack('S4', $winsize);
} else {
return -1;
}
return $col;
}
sub progressBar {
my($current, $total) = @_;
my $width = findTerminalWidth();
my $barWidth = $width - 11;
my $percent = ($current / $total) * 100;
my $barPercent = int($percent / 100 * $barWidth);
printf(" [%3d\%",$percent);
if($width > 0) {
print "] [";
for(my $i = 1; $i < $barWidth; $i++) {
($i <= $barPercent) ? print '=' : print ' ';
}
}
print "]\r";
}
sub help {
print "usage:\t pinger [-d] start [finish]\n\n";
print "\t-d\t\tList dead addresses\n";
print "\t-r\t\tList reachable addresses (default)\n";
print "\t-t\t\tTime ping execution\n";
exit(1);
}