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package POE::Filter::DHCPd::Lease; |
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=head1 NAME |
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POE::Filter::DHCPd::Lease - parses leases from isc dhcpd leases file |
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=head1 VERSION |
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0.0703 |
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=cut |
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our $VERSION = '0.0703'; |
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3692
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use strict; |
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use warnings; |
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use base qw/POE::Filter/; |
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2259
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use Time::Local; |
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4567
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use constant BUFFER => 0; |
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use constant LEASE => 1; |
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use v5.10; |
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our $DATE = qr# (\d{4})/(\d\d)/(\d\d) \s (\d\d):(\d\d):(\d\d) #mx; |
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our $START = qr#^ lease \s ([\d\.]+) \s \{ #mx; |
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our $END = qr# } [\n\r]+ #mx; |
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our $PARSER = qr / (?: (?starts) \s\d+\s (?.+?) |
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| (?ends) \s\d+\s (?.+?) |
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| ^\s*(?binding) \s state \s (?\S+) |
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| ^\s*(?next) \s binding \s state \s (?\S+) |
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| hardware \s (?ethernet) \s (?\S+) |
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| option \s agent.(?remote-id) \s (?.+?) |
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| option \s agent.(?circuit-id) \s (?.+?) |
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| client-(?hostname) \s "(?[^"]+)" |
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) /mx; |
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=head1 METHODS |
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=head2 new |
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my $filter = POE::Filter::DHCPd::Lease->new; |
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=cut |
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sub new { |
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my $class = shift; |
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return bless [ q(), undef ], $class; |
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} |
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=head2 get_one_start |
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$self->get_one_start($stream); |
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C<$stream> is an array-ref of data, that will eventually be parsed into a |
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qualified lease, returned by L or L. |
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=cut |
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sub get_one_start { |
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my $self = shift; |
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my $data = shift; # array-ref of data |
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$self->[BUFFER] .= join '', @$data; |
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return; |
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} |
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66
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=head2 get_one |
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$leases = $self->get_one; |
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C<$leases> is an array-ref, containing zero or one leases. |
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starts => epoch value |
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ends => epoch value |
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binding => "active" or "free" |
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hw_ethernet => 12 chars, without ":" |
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hostname => the client hostname |
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circuit_id => circuit id from relay agent (option 82) |
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remote_id => remote id from relay agent (option 82) |
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=cut |
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sub get_one { |
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my $self = shift; |
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# look for as many lines as we can find in the current buffer |
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while(1) { |
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my $string; |
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# look for lines with \r\n endings |
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if($self->[BUFFER] =~ /^(.*?\x0d?\x0a)/s) { |
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my $length = length $1; |
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$string = substr($self->[BUFFER],0,$length,''); |
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} |
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return [] unless $string; |
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if(!$self->[LEASE] and $string =~ /$START/) { |
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$self->[LEASE] = { ip => $1 }; |
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} elsif ($self->[LEASE]) { |
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if ($string =~ /$PARSER;/) { |
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$self->[LEASE]{$+{name}} = $+{value}; |
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} elsif($string =~ /.*?$END/) { |
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return $self->_done(); |
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} |
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} |
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} |
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0
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0
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return []; |
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} |
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sub _done { |
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my $self = shift; |
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my $lease = delete $self->[LEASE]; |
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for my $k (qw/starts ends/) { |
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next unless($lease->{$k}); |
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if(my @values = $lease->{$k} =~ $DATE) { |
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$values[1]--; # decrease month |
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$lease->{$k} = timelocal(reverse @values); |
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} |
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} |
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if(my $mac = _mac(delete $lease->{'ethernet'})) { |
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$lease->{'hw_ethernet'} = $mac; |
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} |
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# compatibility with old parser output |
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$lease->{'circuit_id'} = delete $lease->{'circuit-id'} if ($lease->{'circuit-id'}); |
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$lease->{'remote_id'} = delete $lease->{'remote-id'} if ($lease->{'remote-id'}); |
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130
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return [ $lease ]; |
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} |
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134
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sub _mac { |
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my $str = shift or return; |
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$str = join "", map { sprintf "%02s", $_ } split /:/, $str; |
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$str =~ tr/[0-9a-fA-F]//cd; |
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return length $str == 12 ? lc($str) : undef; |
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} |
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143
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=head2 get |
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145
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See L. |
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147
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=head2 put |
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149
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Returns an empty string. Should not be used. |
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151
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=cut |
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153
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sub put { |
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0
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0
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return q(); |
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} |
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157
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=head2 get_pending |
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159
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my $buffer = $self->get_pending; |
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161
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Returns any data left in the buffer. |
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163
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=cut |
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165
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sub get_pending { |
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2
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return shift->[BUFFER]; |
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} |
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169
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=head1 AUTHOR |
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171
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Jan Henning Thorsen, C<< >> |
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173
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=head1 COPYRIGHT & LICENSE |
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175
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Copyright 2007 Jan Henning Thorsen, all rights reserved. |
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177
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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180
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=cut |
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182
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1; |