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|
#! /usr/bin/perl
# Wrapper around the base Linux ping command to provide
# nicer API (ie no flag arguments)
#
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2012 Vyatta, Inc.
# All Rights Reserved.
#
#
# Syntax
# ping HOST
# [ audible ]
# [ adaptive ]
# [ allow-broadcast]
# [ count REQUESTS ]
# [ mark N ]
# [ flow LABEL ]
# [ flood ]
# [ interval ]
# [ pattern PATTERN ]
# [ timestamp ]
# [ tos VALUE ]
# [ quiet ]
# [ bypass-routing ]
# [ size SIZE ]
# [ ttl TTL ]
# [ verbose ]
use strict;
use warnings;
use NetAddr::IP;
use feature ":5.10";
sub get_options {
my ($opt, $args) = @_;
my $prev = $$args[-2];
my $arg = $$args[-1];
# print type text for arguments
if ( exists($opt->{$arg}) && $opt->{$arg}->{type} ne "noarg" ){
get_args($opt, $arg);
}
# only show options that we haven't used yet
my $options = '';
foreach my $key (keys(%{$opt})){
next if (grep $_ eq $key, @{$args});
$options .= "$key ";
}
print $options;
exit 0;
}
sub get_args {
my ($opt, $arg) = @_;
print $opt->{$arg}->{type};
exit 0;
}
# Table for translating options to arguments
my %options = (
'audible' => { 'p_arg'=>'a',
'type'=>'noarg',
'help'=>'Make a noise on ping' },
'adaptive' => { 'p_arg'=>'A',
'type'=>'noarg',
'help'=>'Adativly set interpacket interval' },
'allow-broadcast' => { 'p_arg'=>'b',
'type'=>'noarg',
'help'=>'Ping broadcast address' },
'bypass-route' => { 'p_arg'=>'r',
'type'=>'noarg',
'help'=>'Bypass normal routing tables' },
'count' => { 'p_arg'=>'c:',
'type'=>'<requests>',
'help'=>'Number of requests to send' },
'deadline' => { 'p_arg'=>'w:',
'type'=>'<seconds>',
'help'=>'Number of seconds before ping exits' },
'flood' => { 'p_arg'=>'f',
'type'=>'noarg',
'help'=>'Send 100 requests per second' } ,
'interface' => { 'p_arg'=>'I:',
'type'=>'<interface> <X.X.X.X> <h:h:h:h:h:h:h:h>',
'help'=>'Interface to use as source for ping' },
'interval' => { 'p_arg'=>'i:',
'type'=>'<seconds>',
'help'=>'Number of seconds to wait between requests' },
'mark' => { 'p_arg'=>'m:',
'type'=>'<fwmark>',
'help'=>'Mark request for special processing' },
'numeric' => { 'p_arg'=>'n',
'type'=>'noarg',
'help'=>'Do not resolve DNS names' },
'no-loopback' => { 'p_arg'=>'L',
'type'=>'noarg',
'help'=>'Supress loopback of multicast pings' },
'pattern' => { 'p_arg'=>'p:',
'type'=>'<pattern>',
'help'=>'Pattern to fill out the packet' },
'timestamp' => { 'p_arg'=>'D',
'type'=>'noarg',
'help'=>'Print timestamp of output' },
'tos' => { 'p_arg'=>'Q:',
'type'=>'<tos>',
'help'=>'Mark packets with specified TOS' },
'quiet' => { 'p_arg'=>'q',
'type'=>'noarg',
'help'=>'Only print summary lines' },
'record-route' => { 'p_arg'=>'R',
'type'=>'noarg',
'help'=>'Record route the packet takes' },
'size' => { 'p_arg'=>'s:',
'type'=>'<bytes>',
'help'=>'Number of bytes to send' },
'ttl' => { 'p_arg'=>'t:',
'type'=>'<ttl>',
'help'=>'Maximum packet lifetime' },
'verbose' => { 'p_arg'=>'v',
'type'=>'noarg',
'help'=>'Verbose output' }
);
# First argument is host
my $host = shift @ARGV;
die "ping: Missing host\n"
unless defined($host);
if ($host eq "--get-options"){
my @args = @ARGV;
get_options(\%options, \@args);
}
my $ip = new NetAddr::IP $host;
die "ping: Unknown host: $host\n"
unless defined($ip);
my $cmd;
given ($ip->version) {
when (4) { $cmd = '/bin/ping'; }
when (6) { $cmd = '/bin/ping6' }
default {
die "Unknown address: $host\n";
}
}
my @cmdargs = ( 'ping' );
while (my $arg = shift @ARGV) {
my $pingarg = $options{$arg}->{p_arg};
die "ping: unknown option $arg\n"
unless $pingarg;
my $flag = "-" . substr($pingarg, 0, 1);
push @cmdargs, $flag;
if (rindex($pingarg, ':') != -1) {
my $optarg = shift @ARGV;
die "ping: missing argument for $arg option\n"
unless defined($optarg);
push @cmdargs, $optarg;
}
}
exec { $cmd } @cmdargs, $host;
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