added RFID_TCP to query serial readers over tcp socket

diff --git a/lib/Biblio/RFID/Reader/INET.pm b/lib/Biblio/RFID/Reader/INET.pm
new file mode 100644 (file)
index 0000000..ed0887b
--- /dev/null
+++ b/lib/Biblio/RFID/Reader/INET.pm
@@ -0,0 +1,57 @@
+package Biblio::RFID::Reader::INET;
+use warnings;
+use strict;
+use base 'IO::Socket::INET';
+
+use IO::Socket::INET;
+use Time::HiRes qw(ualarm);
+use Data::Dump qw(dump);
+
+=head1 NAME
+
+Biblio::RFID::Reader::INET - emulate serial port over TCP socket
+
+=cut
+
+sub write {
+       my $self = shift;
+       my $count = $self->SUPER::print(@_);
+       $self->flush;
+#warn "XX ",ref($self), " write response: $count ", dump(@_);
+       return $count;
+}
+
+our $read_char_time = 1;
+sub read_char_time { $read_char_time = $_[1] * 1_000 || 1_000_000 };
+sub read_const_time {};
+
+sub read {
+       my $self = shift;
+       my $len = shift || die "no length?";
+#warn "XX ",ref($self), " read $len timeout $read_char_time";
+       my $buffer;
+       eval {
+               local $SIG{ALRM} = sub { die "read timeout" };
+
+               #warn "## read_serial $len timeout $read_char_time\n";
+
+               ualarm $read_char_time;
+               $len = $self->SUPER::read( $buffer, $len );
+               ualarm 0;
+       };
+       if ( $@ ) {
+               warn "ERROR: $@";
+               $len = 0;
+       }
+
+       #warn "## read $len ",dump($buffer);
+       return ( $len, $buffer );
+}
+
+1;
+__END__
+
+=head1 SEE ALSO
+
+L<Biblio::RFID::Reader::Serial>
+

diff --git a/lib/Biblio/RFID/Reader/Serial.pm b/lib/Biblio/RFID/Reader/Serial.pm
index f954f39..24432d5 100644 (file)
--- a/lib/Biblio/RFID/Reader/Serial.pm
+++ b/lib/Biblio/RFID/Reader/Serial.pm
@@ -4,11 +4,12 @@ use warnings;
 use strict;
 
 use Device::SerialPort qw(:STAT);
+use Biblio::RFID::Reader::INET;
 use Data::Dump qw(dump);
 
 =head1 NAME
 
-Biblio::RFID::Reader::Serial - base class for serial RFID readers
+Biblio::RFID::Reader::Serial - base class for serial or serial over TCP RFID readers
 
 =head1 METHODS
 
@@ -35,6 +36,9 @@ Tries to open usb serial ports C</dev/ttyUSB*> and serial ports C</dev/ttyS*>
 
 To try just one device use C<RFID_DEVICE=/dev/ttyUSB1> enviroment variable
 
+If you want to define serial connection over TCP socket, you have to export
+enviroment variable C<RFID_TCP=hostname:port>.
+
 =cut
 
 our $serial_device;
@@ -42,8 +46,21 @@ our $serial_device;
 sub port {
        my $self = shift;
 
+       warn "## port ",dump( $self->{port} );
+
        return $self->{port} if defined $self->{port};
 
+       if ( my $tcp = $ENV{RFID_TCP} ) {
+               my $port = Biblio::RFID::Reader::INET->new(
+                       PeerAddr => $tcp,
+                       Proto    => 'tcp'
+               );
+               warn "## TCP $tcp ", ref($port);
+               $self->{port} = $port;
+               $self->init;
+               return $port;
+       }
+
        my $settings = $self->serial_settings;
        my @devices  = $ENV{RFID_DEVICE} ? ( $ENV{RFID_DEVICE} ) : glob '/dev/ttyUSB* /dev/ttyS*';
        warn "# port devices ",dump(@devices);