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package POE::Component::Client::DNSBL; |
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{ |
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$POE::Component::Client::DNSBL::VERSION = '1.08'; |
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} |
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#ABSTRACT: A component that provides non-blocking DNSBL lookups |
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672500
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use strict; |
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use warnings; |
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120
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3640
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use Net::IP::Minimal qw(ip_is_ipv4 ip_get_version); |
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2833
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use POE qw(Component::Client::DNS); |
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sub spawn { |
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my $package = shift; |
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my %opts = @_; |
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$opts{lc $_} = delete $opts{$_} for keys %opts; |
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$opts{dnsbl} = 'zen.spamhaus.org' unless $opts{dnsbl}; |
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3
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my $options = delete $opts{options}; |
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my $self = bless \%opts, $package; |
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$self->{session_id} = POE::Session->create( |
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object_states => [ |
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$self => { shutdown => '_shutdown', lookup => '_resolve' }, |
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$self => [qw(_start _resolve _lookup _reason)], |
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], |
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heap => $self, |
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( ref($options) eq 'HASH' ? ( options => $options ) : () ), |
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)->ID(); |
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return $self; |
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} |
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sub session_id { |
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1
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5097
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return $_[0]->{session_id}; |
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} |
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sub shutdown { |
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0
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0
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1
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my $self = shift; |
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0
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0
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$poe_kernel->post( $self->{session_id}, 'shutdown' ); |
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} |
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sub lookup { |
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1
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3046
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my $self = shift; |
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65
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$poe_kernel->post( $self->{session_id}, '_resolve', @_ ); |
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} |
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sub _start { |
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3
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3
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1514
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my ($kernel,$self) = @_[KERNEL,OBJECT]; |
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3
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$self->{session_id} = $_[SESSION]->ID(); |
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3
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30
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if ( $self->{alias} ) { |
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0
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0
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$kernel->alias_set( $self->{alias} ); |
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} |
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else { |
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3
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21
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$kernel->refcount_increment( $self->{session_id} => __PACKAGE__ ); |
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} |
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3
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50
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147
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unless ( $self->{resolver} and $self->{resolver}->isa('POE::Component::Client::DNS') ) { |
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3
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41
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$self->{resolver} = POE::Component::Client::DNS->spawn( |
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Alias => __PACKAGE__ . $self->{session_id}, |
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); |
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3
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5996
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$self->{_mydns} = 1; |
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} |
60
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3
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17
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return; |
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} |
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63
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sub _shutdown { |
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3
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3
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225
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my ($kernel,$self) = @_[KERNEL,OBJECT]; |
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3
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24
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$kernel->alarm_remove_all(); |
66
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3
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145
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$kernel->alias_remove( $_ ) for $kernel->alias_list(); |
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3
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50
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135
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$kernel->refcount_decrement( $self->{session_id} => __PACKAGE__ ) unless $self->{alias}; |
68
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3
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50
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126
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$self->{resolver}->shutdown() if $self->{_mydns}; |
69
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3
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636
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delete $self->{resolver}; |
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3
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244
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return; |
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} |
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73
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sub _resolve { |
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11
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11
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2369
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my ($kernel,$self,$state,$sender) = @_[KERNEL,OBJECT,STATE,SENDER]; |
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11
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38
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my $sender_id = $sender->ID(); |
76
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11
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127
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my $args; |
77
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11
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50
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39
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if ( ref( $_[ARG0] ) eq 'HASH' ) { |
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0
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0
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$args = { %{ $_[ARG0] } }; |
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0
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0
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79
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} |
80
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else { |
81
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11
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75
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$args = { @_[ARG0..$#_] }; |
82
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} |
83
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11
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27
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$args->{lc $_} = delete $args->{$_} for grep { !/^_/ } keys %{ $args }; |
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22
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140
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11
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41
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84
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11
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50
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49
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unless ( $args->{event} ) { |
85
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0
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0
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warn "No 'event' specified for $state\n"; |
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0
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0
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return; |
87
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} |
88
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11
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50
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40
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unless ( $args->{address} ) { |
89
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0
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0
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warn "No 'address' specified for $state\n"; |
90
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0
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0
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return; |
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} |
92
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93
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11
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24
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my $address = $args->{address}; |
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95
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11
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100
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56
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if ( ip_get_version( $args->{address} ) ) { |
96
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8
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50
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389
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unless ( ip_is_ipv4( $args->{address} ) ) { |
97
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0
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0
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warn "Given 'address' is not an IPv4 address\n"; |
98
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0
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0
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return; |
99
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} |
100
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8
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217
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$address = reverse split /\./, $args->{address}; |
101
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8
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33
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76
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$args->{dnsbl} ||= $self->{dnsbl}; |
102
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} |
103
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else { |
104
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3
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50
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81
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$args->{dnsbl} ||= 'dbl.spamhaus.org'; |
105
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} |
106
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107
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11
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50
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40
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if ( $args->{session} ) { |
108
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0
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0
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0
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if ( my $ref = $kernel->alias_resolve( $args->{session} ) ) { |
109
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0
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0
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$sender_id = $ref->ID(); |
110
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} |
111
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else { |
112
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0
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0
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warn "Could not resolve 'session' to a valid POE session\n"; |
113
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0
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0
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return; |
114
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} |
115
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} |
116
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11
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33
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29
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$args->{dnsbl} ||= $self->{dnsbl}; |
117
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11
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33
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$args->{sender} = $sender_id; |
118
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11
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100
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64
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$kernel->refcount_increment( $sender_id, __PACKAGE__ ) |
119
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unless ref $args->{event} eq 'POE::Session::AnonEvent'; |
120
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11
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262
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my $response = $self->{resolver}->resolve( |
121
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event => '_lookup', |
122
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host => join( '.', $address, $args->{dnsbl} ), |
123
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type => 'A', |
124
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context => $args, |
125
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); |
126
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11
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50
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49786
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$kernel->yield( '_lookup', $response ) if $response; |
127
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11
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63
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return; |
128
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} |
129
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130
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sub _lookup { |
131
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11
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11
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57358
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my ($kernel,$self,$record) = @_[KERNEL,OBJECT,ARG0]; |
132
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11
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26
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my $args = $record->{context}; |
133
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11
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26
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my $host = $record->{host}; |
134
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11
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50
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97
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unless ( $record->{response} ) { |
135
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0
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0
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$args->{error} = $record->{error}; |
136
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0
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0
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delete $args->{response}; |
137
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} |
138
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else { |
139
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11
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26
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delete $args->{error}; |
140
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11
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112
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my @answers = $record->{response}->answer(); |
141
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11
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100
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75
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if ( @answers ) { |
142
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2
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7
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foreach my $answer ( @answers ) { |
143
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2
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60
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$args->{response} = $answer->rdatastr(); |
144
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2
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46
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my $response = $self->{resolver}->resolve( |
145
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event => '_reason', |
146
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host => $host, |
147
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type => 'TXT', |
148
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context => $args, |
149
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); |
150
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2
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50
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4496
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$kernel->yield( '_reason', $response ) if $response; |
151
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} |
152
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2
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12
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return; |
153
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} |
154
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else { |
155
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9
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29
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$args->{response} = 'NXDOMAIN'; |
156
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} |
157
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} |
158
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9
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25
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my $sender_id = delete $args->{sender}; |
159
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9
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21
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my $event = delete $args->{event}; |
160
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9
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100
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34
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if ( ref $event eq 'POE::Session::AnonEvent' ) { |
161
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4
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14
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$event->( $args ); |
162
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} |
163
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else { |
164
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5
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20
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$kernel->post( $sender_id, $event, $args ); |
165
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5
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886
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$kernel->refcount_decrement( $sender_id, __PACKAGE__ ); |
166
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} |
167
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9
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489
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return; |
168
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} |
169
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170
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sub _reason { |
171
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2
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2
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14265
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my ($kernel,$self,$record) = @_[KERNEL,OBJECT,ARG0]; |
172
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2
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7
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my $args = $record->{context}; |
173
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2
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6
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my $host = $record->{host}; |
174
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2
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50
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8
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unless ( $record->{response} ) { |
175
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0
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0
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$args->{error} = $record->{error}; |
176
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0
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0
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delete $args->{response}; |
177
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} |
178
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else { |
179
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2
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4
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delete $args->{error}; |
180
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2
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15
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my @answers = $record->{response}->answer(); |
181
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2
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50
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21
|
if ( @answers ) { |
182
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2
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5
|
foreach my $answer ( @answers ) { |
183
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2
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|
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16
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$args->{reason} = $answer->rdatastr(); |
184
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|
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} |
185
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} |
186
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|
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else { |
187
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0
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0
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$args->{reason} = ''; |
188
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} |
189
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} |
190
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2
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679
|
my $sender_id = delete $args->{sender}; |
191
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2
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13
|
$kernel->post( $sender_id, $args->{event}, $args ); |
192
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2
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228
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$kernel->refcount_decrement( $sender_id, __PACKAGE__ ); |
193
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2
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55
|
return; |
194
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} |
195
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196
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1; |
197
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198
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199
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__END__ |