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1
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package Data::ParseBinary::Data::Cap;
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2
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1
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1
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698
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use strict;
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1
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2
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1
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37
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3
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1
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1
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6
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use warnings;
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1
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2
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1
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27
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4
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1
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1
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5
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use Data::ParseBinary;
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1
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1
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1
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408
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5
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1
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1
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5
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use Data::ParseBinary qw{OptionalGreedyRange};
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1
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2
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1
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195
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6
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#"""
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7
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#tcpdump capture file
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8
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#"""
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9
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10
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11
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my $packet = Struct("packet",
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12
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Data::ParseBinary::lib::DataCap::MicrosecAdapter->create(
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13
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Sequence("time",
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14
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ULInt32("time"),
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15
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ULInt32("usec"),
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16
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)
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17
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),
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18
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ULInt32("length"),
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19
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Padding(4),
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20
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Field("data", sub { $_->ctx->{length} }),
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21
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);
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22
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23
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our $data_cap_parser = Struct("cap_file",
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24
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Padding(24),
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25
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OptionalGreedyRange($packet),
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26
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);
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27
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28
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require Exporter;
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29
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our @ISA = qw(Exporter);
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30
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our @EXPORT = qw($data_cap_parser);
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31
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32
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package Data::ParseBinary::lib::DataCap::MicrosecAdapter;
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33
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our @ISA;
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34
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1
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1
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228
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BEGIN { @ISA = qw{Data::ParseBinary::Adapter}; }
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35
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36
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sub _decode {
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37
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21
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21
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39
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my ($self, $value) = @_;
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38
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21
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102
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return sprintf("%d.%06d", @$value)
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39
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}
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40
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41
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sub _encode {
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42
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21
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21
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33
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my ($self, $tvalue) = @_;
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43
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21
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50
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54
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if ( index($tvalue, ".") >= 0 ) {
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44
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21
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205
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my ($sec, $usec) = $tvalue =~ /^(\d+)\.(\d*)$/;
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45
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21
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50
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56
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if (length($usec) > 6) {
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46
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0
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0
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$usec = substr($usec, 0, 6);
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47
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} else {
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48
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21
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47
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$usec .= "0" x (6 - length($usec));
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49
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}
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50
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21
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85
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return [$sec, $usec];
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51
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} else {
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52
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0
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return [$tvalue, 0];
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53
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}
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54
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}
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55
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#def _decode(self, obj, context):
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56
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# return datetime.fromtimestamp(obj[0] + (obj[1] / 1000000.0))
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57
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#def _encode(self, obj, context):
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58
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# offset = time.mktime(*obj.timetuple())
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59
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# sec = int(offset)
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60
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# usec = (offset - sec) * 1000000
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61
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# return (sec, usec)
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62
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63
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64
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1;
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65
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66
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__END__
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