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package POE::Wheel::UDP; |
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=head1 NAME |
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POE::Wheel::UDP - POE Wheel for UDP handling. |
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=head1 SYNOPSIS |
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use POE; |
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use POE::Wheel::UDP; |
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POE::Session->create( |
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inline_states => { |
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_start => sub { |
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my $wheel = $_[HEAP]->{wheel} = POE::Wheel::UDP->new( |
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LocalAddr => '10.0.0.1', |
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LocalPort => 1234, |
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PeerAddr => '10.0.0.2', |
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PeerPort => 1235, |
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InputEvent => 'input', |
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Filter => POE::Filter::Stream->new, |
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); |
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$wheel->put( |
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{ |
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payload => [ 'This datagram will go to the default address.' ], |
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}, |
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{ |
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payload => [ 'This datagram will go to the explicit address and port I have paired with it.' ], |
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addr => '10.0.0.3', |
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port => 1236, |
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}, |
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); |
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}, |
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input => sub { |
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my ($wheel_id, $input) = @_[ARG0, ARG1]; |
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print "Incoming datagram from $input->{addr}:$input->{port}: '$input->{payload}'\n"; |
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}, |
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} |
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); |
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POE::Kernel->run; |
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=head1 DESCRIPTION |
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POE Wheel for UDP handling. |
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=cut |
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use 5.006; # I don't plan to support old perl |
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use strict; |
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use warnings; |
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use base 'POE::Wheel'; |
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use POE; |
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use Carp; |
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use Socket; |
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use Fcntl; |
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3686
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our $VERSION = '0.02'; |
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$VERSION = eval $VERSION; # see L |
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=head1 Package Methods |
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=head2 $wheel = POE::Wheel::UDP->new( OPTIONS ); |
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Constructor for a new UDP Wheel object. OPTIONS is a key => value pair list specifying the following options: |
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=over |
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=item LocalAddr |
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=item LocalPort |
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(Required Pair) |
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Specify the local IP address and port for the created socket. LocalAddr should be in dotted-quad notation, |
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and LocalPort should be an integer. This module will not resolve names to numbers at all. |
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=item PeerAddr |
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=item PeerPort |
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(Optional Pair) |
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Specify the remote IP address and port for the created socket. As above, PeerAddr should be in dotted-quad |
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notation, and PeerPort should be an integer. These arguments are used to perform a C connect(2) on the socket, |
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which means that outbound datagrams will be sent to this address by default AND inbound datagrams from sources |
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other than this peer will be ignored. If you want to just set a default destination for packets, use the |
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DefaultAddr and DefaultPort items instead. |
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=item DefaultAddr |
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=item DefaultPort |
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(Optional Pair) |
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Dotted quad, and integer (respectively) options for the default destination of datagrams originating from this |
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wheel. This setting will override the PeerAddr and PeerPort on each put() method, but you can override this |
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by passing arguments directly to the put() method. |
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102
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=item InputEvent |
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104
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(Optional) |
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Specify the event to be invoked via Kernel->yield when a packet arrives on this socket. Currently all incoming |
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data is truncated to 1500 bytes. If you do not specify an event, the wheel will not ask the kernel to pass |
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incoming datagrams to it, and therefore this wheel will not hold your session alive. |
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=item InputFilter |
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(Required if InputEvent defined) |
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Assign a POE::Filter object to the input side of this wheel. |
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116
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=item OutputFilter |
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118
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(Required if you want to call the put method) |
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120
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Assign a POE::Filter object to the output side of this wheel. |
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122
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=item Filter |
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Shorthand for assigning the same filter object to both the InputFilter and OutputFilter arguments. |
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126
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=back |
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128
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=cut |
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130
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sub new { |
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1
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my $class = shift; |
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9
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carp( "Uneven set of options passed to ${class}->new." ) unless (@_ % 2 == 0); |
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12
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my %opts = @_; |
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12
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my $self = bless { }, (ref $class || $class); |
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137
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2
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4
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my %sockopts; |
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139
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2
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6
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foreach (qw(LocalAddr LocalPort PeerAddr PeerPort)) { |
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24
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$sockopts{$_} = delete( $opts{$_} ) if exists( $opts{$_} ); |
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} |
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143
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2
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9
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$self->_open( %sockopts ); |
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145
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2
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13
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my $id = $self->{id} = $self->SUPER::allocate_wheel_id(); |
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2
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19
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my $read_event = $self->{read_event} = ref($self) . "($id) -> select read"; |
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6
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my $write_event = $self->{write_event} = ref($self) . "($id) -> select write"; |
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149
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11
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if (exists( $opts{DefaultAddr} ) or exists( $opts{DefaultPort} )) { |
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croak "DefaultAddr is required if DefaultPort is specified." |
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unless exists( $opts{DefaultAddr} ); |
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0
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0
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0
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croak "DefaultPort is required if DefaultAddr is specified." |
153
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unless exists( $opts{DefaultPort} ); |
154
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155
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0
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0
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0
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my $addr = inet_aton( $opts{DefaultAddr} ) |
156
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or croak( "Supplied 'DefaultAddr' value '$opts{DefaultAddr}' caused inet_aton failure: $!" ); |
157
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158
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0
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0
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my $spec = pack_sockaddr_in( $opts{DefaultPort}, $addr ) |
159
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or croak( "Supplied 'DefaultPort' value '$opts{DefaultPort}' caused pack_sockaddr_in failure: $!" ); |
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161
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$self->{DefaultAddr} = delete $opts{DefaultAddr}; |
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$self->{DefaultPort} = delete $opts{DefaultPort}; |
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0
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0
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$self->{default_send} = $spec; |
164
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} |
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11
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if (exists( $opts{Filter} )) { |
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2
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3
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my $filter = delete $opts{Filter}; |
168
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2
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59
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$opts{InputFilter} ||= $filter; |
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33
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31
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$opts{OutputFilter} ||= $filter; |
170
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} |
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172
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50
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6
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if (exists( $opts{InputFilter} )) { |
173
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2
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3
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$self->{InputFilter} = delete $opts{InputFilter}; |
174
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} |
175
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176
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2
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50
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6
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if (exists( $opts{OutputFilter} )) { |
177
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2
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4
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$self->{OutputFilter} = delete $opts{OutputFilter}; |
178
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} |
179
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180
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2
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100
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4
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if (exists( $opts{InputEvent} )) { |
181
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1
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50
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5
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croak "InputFilter option is required if InputEvent is defined." |
182
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unless exists($self->{InputFilter}); |
183
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184
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1
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3
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my $filter = \$self->{InputFilter}; |
185
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186
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1
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2
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my $input_event = $self->{InputEvent} = delete $opts{InputEvent}; |
187
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188
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$poe_kernel->state( $read_event, sub { |
189
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100
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100
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71058
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my ($kernel, $socket) = @_[KERNEL, ARG0]; |
190
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100
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167
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$! = undef; |
191
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100
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852
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while( my $addr = recv( $socket, my $input = "", 1500, MSG_DONTWAIT ) ) { |
192
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100
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50
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183
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if (defined( $addr )) { |
193
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100
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111
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my %input_data; |
194
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195
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100
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50
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205
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if ($addr) { |
196
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100
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50
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463
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my ($port, $addr) = unpack_sockaddr_in( $addr ) |
197
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or warn( "sockaddr_in failure: $!" ); |
198
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100
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577
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$input_data{addr} = inet_ntoa( $addr ); |
199
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100
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195
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$input_data{port} = $port; |
200
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} |
201
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202
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100
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167
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$input_data{bytes} = length( $input ); |
203
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204
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100
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127
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local $POE::Filter::DATAGRAM = 1; |
205
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206
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100
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386
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$$filter->get_one_start( [ $input ] ); |
207
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208
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100
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459
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my @payload; |
209
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100
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255
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while (my $records = $$filter->get_one) { |
210
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200
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100
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2266
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last unless @$records; |
211
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100
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|
|
405
|
push @payload, @$records; |
212
|
|
|
|
|
|
|
} |
213
|
|
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|
|
|
214
|
100
|
|
|
|
|
664
|
$poe_kernel->yield( $input_event, { |
215
|
|
|
|
|
|
|
payload => \@payload, |
216
|
|
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|
|
|
|
%input_data, |
217
|
|
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|
|
}, $id ); |
218
|
|
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|
|
} |
219
|
|
|
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|
|
else { |
220
|
0
|
|
|
|
|
0
|
warn "recv failure: $!"; |
221
|
|
|
|
|
|
|
next |
222
|
0
|
|
|
|
|
0
|
} |
223
|
|
|
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|
|
|
} |
224
|
1
|
|
|
|
|
13
|
} ); |
225
|
|
|
|
|
|
|
|
226
|
1
|
|
|
|
|
25
|
$poe_kernel->select_read( $self->{sock}, $read_event ); |
227
|
|
|
|
|
|
|
} |
228
|
|
|
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|
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|
|
229
|
|
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|
|
# Does anyone know if I should watch for writability on the socket at all? it's pretty hard to test |
230
|
|
|
|
|
|
|
# to see if UDP can ever return EAGAIN because I can't get it to go fast enough to blast past the buffers. |
231
|
|
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|
|
|
|
232
|
2
|
50
|
|
|
|
96
|
croak "Extra options passed to new(): " . join( ', ', map { "'$_'" } keys %opts ) |
|
0
|
|
|
|
|
0
|
|
233
|
|
|
|
|
|
|
if keys %opts; |
234
|
|
|
|
|
|
|
|
235
|
2
|
|
|
|
|
8
|
return $self; |
236
|
|
|
|
|
|
|
} |
237
|
|
|
|
|
|
|
|
238
|
|
|
|
|
|
|
sub _open { |
239
|
2
|
|
|
2
|
|
3
|
my $self = shift; |
240
|
2
|
|
|
|
|
14
|
my %opts = @_; |
241
|
|
|
|
|
|
|
|
242
|
2
|
|
|
|
|
974
|
my $proto = getprotobyname( "udp" ); |
243
|
|
|
|
|
|
|
|
244
|
2
|
50
|
|
|
|
71
|
socket( my $sock, PF_INET, SOCK_DGRAM, $proto ) |
245
|
|
|
|
|
|
|
or die( "socket() failure: $!" ); |
246
|
|
|
|
|
|
|
|
247
|
2
|
50
|
|
|
|
13
|
fcntl( $sock, F_SETFL, O_NONBLOCK | O_RDWR ) |
248
|
|
|
|
|
|
|
or die( "fcntl problem: $!" ); |
249
|
|
|
|
|
|
|
|
250
|
2
|
50
|
|
|
|
15
|
setsockopt( $sock, SOL_SOCKET, SO_REUSEADDR, 1 ) |
251
|
|
|
|
|
|
|
or die( "setsockopt SO_REUSEADDR failed: $!" ); |
252
|
|
|
|
|
|
|
|
253
|
|
|
|
|
|
|
{ |
254
|
2
|
50
|
|
|
|
3
|
my $addr = inet_aton( $opts{LocalAddr} ) |
|
2
|
|
|
|
|
31
|
|
255
|
|
|
|
|
|
|
or die( "inet_aton problem: $!" ); |
256
|
2
|
50
|
|
|
|
11
|
my $sockaddr = sockaddr_in( $opts{LocalPort}, $addr ) |
257
|
|
|
|
|
|
|
or die( "sockaddr_in problem: $!" ); |
258
|
2
|
50
|
|
|
|
39
|
bind( $sock, $sockaddr ) |
259
|
|
|
|
|
|
|
or die( "bind error: $!" ); |
260
|
|
|
|
|
|
|
} |
261
|
|
|
|
|
|
|
|
262
|
2
|
50
|
33
|
|
|
14
|
if ($opts{PeerAddr} and $opts{PeerPort}) { |
263
|
2
|
50
|
|
|
|
11
|
my $addr = inet_aton( $opts{PeerAddr} ) |
264
|
|
|
|
|
|
|
or die( "inet_aton problem: $!" ); |
265
|
2
|
50
|
|
|
|
6
|
my $sockaddr = sockaddr_in( $opts{PeerPort}, $addr ) |
266
|
|
|
|
|
|
|
or die( "sockaddr_in problem: $!" ); |
267
|
2
|
50
|
|
|
|
31
|
connect( $sock, $sockaddr ) |
268
|
|
|
|
|
|
|
or die( "connect error: $!" ); |
269
|
|
|
|
|
|
|
} |
270
|
|
|
|
|
|
|
|
271
|
2
|
|
|
|
|
11
|
return $self->{sock} = $sock; |
272
|
|
|
|
|
|
|
} |
273
|
|
|
|
|
|
|
|
274
|
|
|
|
|
|
|
=head1 Object Methods |
275
|
|
|
|
|
|
|
|
276
|
|
|
|
|
|
|
=head2 $wheel->put( LIST ) |
277
|
|
|
|
|
|
|
|
278
|
|
|
|
|
|
|
Returns the total number of bytes sent in this call, which may not match the number of bytes |
279
|
|
|
|
|
|
|
you passed in for payloads due to send(2) semantics. Takes a list of hashrefs with the |
280
|
|
|
|
|
|
|
following useful keys in them: |
281
|
|
|
|
|
|
|
|
282
|
|
|
|
|
|
|
=over |
283
|
|
|
|
|
|
|
|
284
|
|
|
|
|
|
|
=item payload |
285
|
|
|
|
|
|
|
|
286
|
|
|
|
|
|
|
An arrayref of records you wish to put through the filter and send in datagrams. The arrayref |
287
|
|
|
|
|
|
|
is used to allow more than one logical record per datagram. |
288
|
|
|
|
|
|
|
|
289
|
|
|
|
|
|
|
=item bytes |
290
|
|
|
|
|
|
|
|
291
|
|
|
|
|
|
|
How many bytes were read from this datagram. Currently a maximum of 1500 will be read, and |
292
|
|
|
|
|
|
|
datagrams which are larger will be truncated. |
293
|
|
|
|
|
|
|
|
294
|
|
|
|
|
|
|
=item addr |
295
|
|
|
|
|
|
|
|
296
|
|
|
|
|
|
|
=item port |
297
|
|
|
|
|
|
|
|
298
|
|
|
|
|
|
|
Specify a destination IP address and port for this specific packet. Optional if you specified |
299
|
|
|
|
|
|
|
a PeerAddr and PeerPort in the wheel constructor; Required if you did not. |
300
|
|
|
|
|
|
|
|
301
|
|
|
|
|
|
|
=back |
302
|
|
|
|
|
|
|
|
303
|
|
|
|
|
|
|
=cut |
304
|
|
|
|
|
|
|
|
305
|
|
|
|
|
|
|
sub put { |
306
|
100
|
|
|
100
|
1
|
16351
|
my $self= shift; |
307
|
|
|
|
|
|
|
|
308
|
100
|
|
|
|
|
153
|
my $sock = $self->{sock}; |
309
|
100
|
|
|
|
|
103
|
my $total_bytes = 0; |
310
|
|
|
|
|
|
|
|
311
|
100
|
|
|
|
|
246
|
while (my $thing = shift) { |
312
|
100
|
50
|
|
|
|
184
|
if (!defined( $thing )) { |
313
|
0
|
|
|
|
|
0
|
warn "Undefined argument, ignoring"; |
314
|
0
|
|
|
|
|
0
|
next; |
315
|
|
|
|
|
|
|
} |
316
|
|
|
|
|
|
|
|
317
|
100
|
50
|
|
|
|
233
|
if (ref( $thing ) ne 'HASH') { |
318
|
0
|
|
|
|
|
0
|
warn "Non-hasref argument, ignoring"; |
319
|
0
|
|
|
|
|
0
|
next; |
320
|
|
|
|
|
|
|
} |
321
|
|
|
|
|
|
|
|
322
|
100
|
50
|
|
|
|
205
|
my $payload = $thing->{payload} or die; |
323
|
|
|
|
|
|
|
|
324
|
100
|
50
|
|
|
|
203
|
die unless ref($payload) eq 'ARRAY'; |
325
|
|
|
|
|
|
|
|
326
|
100
|
|
|
|
|
136
|
my $filter = $self->{OutputFilter}; |
327
|
100
|
|
|
|
|
243
|
my $records = $filter->put( $payload ); |
328
|
|
|
|
|
|
|
|
329
|
100
|
|
|
|
|
407
|
my $bytes; |
330
|
100
|
50
|
33
|
|
|
516
|
if (exists( $thing->{addr} ) or exists( $thing->{port} )) { |
|
|
50
|
|
|
|
|
|
331
|
0
|
0
|
|
|
|
0
|
my $addr = $thing->{addr} or die; |
332
|
0
|
0
|
|
|
|
0
|
my $port = $thing->{port} or die; |
333
|
|
|
|
|
|
|
|
334
|
0
|
|
|
|
|
0
|
foreach my $output (@$records) { |
335
|
0
|
|
|
|
|
0
|
$bytes = send( $sock, $output, MSG_DONTWAIT, sockaddr_in( $port,inet_aton( $addr ) ) ); |
336
|
|
|
|
|
|
|
} |
337
|
|
|
|
|
|
|
} |
338
|
|
|
|
|
|
|
elsif (exists( $self->{default_send} )) { |
339
|
0
|
|
|
|
|
0
|
my $default_send = $self->{default_send}; |
340
|
0
|
|
|
|
|
0
|
foreach my $output (@$records) { |
341
|
0
|
|
|
|
|
0
|
$bytes = send( $sock, $output, MSG_DONTWAIT, $default_send ); |
342
|
|
|
|
|
|
|
} |
343
|
|
|
|
|
|
|
} |
344
|
|
|
|
|
|
|
else { |
345
|
100
|
|
|
|
|
171
|
foreach my $output (@$records) { |
346
|
100
|
|
|
|
|
2102
|
$bytes = send( $sock, $output, MSG_DONTWAIT ); |
347
|
|
|
|
|
|
|
} |
348
|
|
|
|
|
|
|
} |
349
|
|
|
|
|
|
|
|
350
|
100
|
50
|
|
|
|
243
|
if (!defined( $bytes )) { |
351
|
0
|
|
|
|
|
0
|
die( "send() failed: $!" ); |
352
|
|
|
|
|
|
|
# if we ever remove fatal handling of this, do the following: |
353
|
|
|
|
|
|
|
# push current thing onto buffer. |
354
|
|
|
|
|
|
|
# last; |
355
|
|
|
|
|
|
|
} |
356
|
100
|
|
|
|
|
350
|
$total_bytes += $bytes; |
357
|
|
|
|
|
|
|
} |
358
|
|
|
|
|
|
|
|
359
|
|
|
|
|
|
|
# push rest of @_ onto buffer |
360
|
|
|
|
|
|
|
|
361
|
100
|
|
|
|
|
188
|
return $total_bytes; |
362
|
|
|
|
|
|
|
} |
363
|
|
|
|
|
|
|
|
364
|
|
|
|
|
|
|
sub DESTROY { |
365
|
2
|
|
|
2
|
|
1353
|
my $self = shift; |
366
|
2
|
50
|
|
|
|
11
|
if ($self->{read_event}) { |
367
|
2
|
|
|
|
|
12
|
$poe_kernel->state( delete $self->{read_event} ); |
368
|
2
|
|
|
|
|
60
|
$poe_kernel->select_read( $self->{sock} ); |
369
|
|
|
|
|
|
|
} |
370
|
2
|
|
|
|
|
172
|
$self->SUPER::free_wheel_id( delete $self->{id} ); |
371
|
|
|
|
|
|
|
} |
372
|
|
|
|
|
|
|
|
373
|
|
|
|
|
|
|
sub allocate_wheel_id; # try to cancel this method from being inhereted. |
374
|
|
|
|
|
|
|
sub free_wheel_id; |
375
|
|
|
|
|
|
|
|
376
|
|
|
|
|
|
|
1; |
377
|
|
|
|
|
|
|
__END__ |