#! /usr/bin/perl
use Class::Struct;
use Math::BigInt;
my $usage = "Usage: $0 tcpdump_file\n";
my $fh;
struct( conn =>
{ fin => int, stime => double, etime => double});
my %hash = ();
if ($#ARGV != 0)
{
die "$usage";
}
else
{
my $file = $ARGV[0];
my $start = 0;
open(TD, "sudo tcpdump -r $file -tt |") || die "tcpdump failed\n";
while (
) {
if (/([0-9]+.[0-9]+)(.*)(1.1.2.3.*)(\.[0-9]+)(.*5.6.7.8.*)(S)/)
{
my $time = $1;
if ($start == 0)
{
$start = $time;
}
my $port = $4;
if ($hash{$port} == 0)
{
$hash{$port} = new conn();
$hash{$port}->{fin} = 0;
$hash{$port}->{stime} = $1;
$hash{$port}->{etime} = 0;
my $fin = $hash{$port}->{fin};
}
}
elsif (/([0-9]+.[0-9]+)(.*)(1.1.2.3)(\.[0-9]+)(.*)(5.6.7.8)(.*)([F|.|R])/)
{
my $time = $1;
my $port = $4;
my $flag = $8;
my $h = $hash{$port};
if ($hash{$port} != 0 && ($flag eq 'F'))
{
$hash{$port}->{fin} = 1;
}
elsif (($flag eq "." && $hash{$port}->{fin} == 1) ||
$flag eq "R")
{
$hash{$port}->{etime} = $1;
}
}
elsif (/([0-9]+.[0-9]+)(.*)(1.1.2.3)(\.[0-9]+)(.*)(5.6.7.8.*)(.*)(R)/)
{
my $time = $1;
my $port = $4;
my $flag = $7;
$hash{$port}->{etime} = $1;
}
}
for my $key ( keys %hash ) {
my $stime = $hash{$key}->{stime};
my $etime = $hash{$key}->{etime};
if ($etime == 0)
{
$etime = $stime + 200.0;
}
my $begin = $stime - $start;
my $dur = $etime - $stime;
print "$begin $dur\n";
}
}
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