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path: root/misc/monitorCallerID.pl
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use POSIX;
use Carp;

#use Data::Dumper;
use IO::Socket;

sub decode_msg_header {
    my $bin = shift;
    my $len = unpack( 'n', $bin );
    return $len;
}

sub encode_msg_header {
    my $len = shift;

    #	print("len: [$len]\n");
    die "Message larger than allowed!" unless ( $len <= 240 );
    my $bin = pack( 'n', $len );
    return $bin;
}

sub convert_to_hex {
    my $pdu = $_[0];
    my $hexdata = unpack( 'H*', $pdu );
    $hexdata =~ tr/a-z/A-Z/;
    $hexdata =~ s/(..)/$1 /g;
    $hexdata =~ s/ $//g;
    return $hexdata;
}

sub send_pdu {
    my $pdu    = $_[0];
    my $header = encode_msg_header( length($pdu) );
    $socket->write($header);
    $headerdata = convert_to_hex($header);

    #	print("SENT HEADER: [$headerdata]\n");
    $socket->write($pdu);
    $hexdata = convert_to_hex($pdu);

    #	print("SENT:    [$hexdata]\n");
}

sub csta_connect {
    my %args = %{ $_[0] };
    open_csta_socket( $args{host}, $args{port} );

    # A-ASSOCIATE Request
    my $pdu =
"602380020780A10706052B0C00815ABE14281206072B0C00821D8148A007A0050303000800";
    $pdu = pack( 'H*', $pdu );
    send_pdu($pdu);

    # A-ASSOCIATE Result
    receive_stuff();
}

sub open_csta_socket {
    my $host = shift;
    my $port = shift;

    #	print("trying to open a connection to $host on port $port\n");
    $socket = new IO::Socket::INET(
        PeerAddr => $host,
        PeerPort => $port,
        Blocking => 1,
        Proto    => 'tcp'
    ) || die "Error creating socket: $!\n";
    $socket->autoflush(1);
    print("opened a connection to $host on port $port\n");
}

sub receive_stuff {
    my $header = '';
    my $pdu    = '';
    my $nbytes = $socket->sysread( $header, 2 );
    if ( $nbytes == 1 ) {    # фрагмент пакета

        #		print("RECEIVED fragment".chr(7)."\n");
        $nbytes2 = $socket->sysread( $header2, 1 );
        $header  = $header . $header2;
        $nbytes  = 2;
    }
    croak "Didn't receive the specified amount of data (2 bytes)!\n" . chr(7)
      unless ( $nbytes == 2 );

    #	print("Received 2 bytes, assuming it's a data length\n");
    my $len = decode_msg_header($header);

    #	print("Waiting for [$len] bytes of ASN1 data now\n");
    $nbytes = $socket->sysread( $pdu, $len );
    if ( $nbytes < $len ) {    # фрагмент пакета

        #		print("RECEIVED fragment".chr(7)."\n");
        $nbytes2 = $socket->sysread( $pdu2, $len - $nbytes );
        $pdu     = $pdu . $pdu2;
        $nbytes  = $nbytes + $nbytes2;
    }
    croak "Didn't receive the specified amount of data ($len bytes)!\n" . chr(7)
      unless ( $nbytes == $len );
    my $hexdata = convert_to_hex($pdu);

    #	print("RECEIVED:[$hexdata]\n");
    return $pdu;
}

sub main_loop {
    while (1) {
        my $pdu     = receive_stuff();
        my $hexdata = convert_to_hex($pdu);

        # If SystemStatus Request
        if ( $hexdata =~ /A1 0C 02 01 .. 02 02 00 D3 30 03 0A 01 02/ ) {

            # SystemStatus Response
            my $pdu =
              "A20B0201" . substr( $hexdata, 12, 2 ) . "3006020200D30500";
            $pdu = pack( 'H*', $pdu );
            send_pdu($pdu);
        }

        # If SystemStatus Request 2
        elsif ( $hexdata =~ /A1 0D 02 02 .. .. 02 02 00 D3 30 03 0A 01 02/ ) {

            # SystemStatus Response 2
            my $pdu =
                "A20C0202"
              . substr( $hexdata, 12, 2 )
              . substr( $hexdata, 15, 2 )
              . "3006020200D30500";
            $pdu = pack( 'H*', $pdu );
            send_pdu($pdu);
        }

        # if localConnectionInfo=alerting and cause=newCall|distributed
        elsif ( $hexdata =~ m/4E 01 02 0A 01 [12]6/ ) {

            # звонок от
            if ( $hexdata =~ m/61 .. 30 .. 80 / ) {
                $num = hex( substr( $', 0, 2 ) );
                $str = substr( $', 3, $num * 3 );
                $str =~ s/\s//g;
                $CallerID = pack( "H*", $str );
            }
            else {
                $CallerID = "CO" . substr( $hexdata, length($hexdata) - 2, 2 );
            }

            # звонок кому
            if ( $hexdata =~ m/63 .. 30 .. 80 / ) {
                $num = hex( substr( $', 0, 2 ) );
                $str = substr( $', 3, $num * 3 );
                $str =~ s/\s//g;
                $CalledID = pack( "H*", $str );
            }
            print strftime( "%H:%M:%S ", localtime );
            print("Call to:$CalledID from:$CallerID\n");
        }
    }
}

sub MonitorStart {
    my $ext = shift;
    $ext =~ s/(.)/sprintf("%02x",ord($1))/eg;
    my $pdu = "A111020178020147300930058003" . $ext . "A000";
    $pdu = pack( 'H*', $pdu );
    send_pdu($pdu);
    $pdu = receive_stuff();
}
csta_connect( { 'host' => '192.168.0.101', 'port' => 33333 } );
for ( $ext_num = 101 ; $ext_num <= 156 ; $ext_num++ ) {
    MonitorStart($ext_num);
}
main_loop();