mirror of
https://github.com/paulusmack/ppp.git
synced 2024-11-30 15:03:36 +08:00
82 lines
1.9 KiB
Perl
Executable File
82 lines
1.9 KiB
Perl
Executable File
#!/usr/bin/perl
|
|
# vim: shiftwidth=4 tabstop=4
|
|
#
|
|
# This program dumps to standard output the content of the file written
|
|
# by pppd's lcp-rtt-file configuration option.
|
|
#
|
|
# Copyright (C) Marco d'Itri <md@linux.it>
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
|
|
use v5.14;
|
|
use warnings;
|
|
use autodie;
|
|
|
|
use POSIX qw(strftime);
|
|
|
|
{
|
|
my $data = read_data($ARGV[0] || '/run/ppp-rtt.data');
|
|
die "The data file is invalid!\n" if not $data;
|
|
dump_data($data);
|
|
}
|
|
|
|
sub dump_data {
|
|
my ($s) = @_;
|
|
|
|
say "status: $s->{status}";
|
|
say "interval: $s->{echo_interval}";
|
|
say "position: $s->{position}";
|
|
say 'elements: ' . scalar(@{ $s->{data} });
|
|
say '';
|
|
|
|
foreach (my $i= 0; $i < @{ $s->{data} }; $i++) {
|
|
my $date = strftime('%F %T', localtime($s->{data}->[$i]->[0]));
|
|
print "$i\t$date\t$s->{data}->[$i]->[1]\t$s->{data}->[$i]->[2]\n";
|
|
}
|
|
}
|
|
|
|
sub read_data {
|
|
my ($file) = @_;
|
|
|
|
my $data;
|
|
open(my $fh, '<', $file);
|
|
binmode($fh);
|
|
my $bytes_read;
|
|
do {
|
|
$bytes_read = sysread($fh, $data, 8192, length($data));
|
|
} while ($bytes_read == 8192);
|
|
close($fh);
|
|
|
|
my ($magic, $status, $position, $echo_interval, $rest)
|
|
= unpack('NNNN a*', $data);
|
|
return undef if $magic != 0x19450425;
|
|
|
|
# the position is relative to the C array, not to the logical entries
|
|
$position /= 2;
|
|
|
|
my @rawdata = unpack('(N C a3)*', $rest);
|
|
my @data;
|
|
while (my ($time, $loss, $rtt) = splice(@rawdata, 0, 3)) {
|
|
push(@data, [ $time, unpack('N', "\000$rtt"), $loss ]);
|
|
}
|
|
|
|
if (0) {
|
|
@data =
|
|
# skip any "empty" (null) entries
|
|
grep { $_->[0] }
|
|
# rearrange the list in chronological order
|
|
(@data[$position+1 .. $#data], @data[0 .. $position]);
|
|
}
|
|
|
|
return {
|
|
status => $status,
|
|
echo_interval => $echo_interval,
|
|
position => $position,
|
|
data => \@data,
|
|
};
|
|
}
|
|
|