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