nes-proj/tools/rftestrx2pcap.pl

#!/usr/bin/perl -w

use Device::SerialPort;
use Term::ReadKey;
use Getopt::Long;
use Time::HiRes qw(usleep gettimeofday);

use strict;

my $filename = '';
my $second = '';
my $term = '/dev/ttyUSB0';
my $baud = '115200';
my $verbose;

GetOptions (
	    'terminal=s' => \$term, 
	    'baud=s' => \$baud,
    );

$| = 1;

# TODO: add help argument
#    print "Example usage: rftestrx2pcap.pl -t /dev/ttyS0 -b 9600\n";
#    exit;

my $ob = Device::SerialPort->new ($term) or die "Can't start $term\n";
    # next test will die at runtime unless $ob

$ob->baudrate($baud);
$ob->parity('none');
$ob->databits(8);
$ob->stopbits(1);
$ob->read_const_time(1000); # 1 second per unfulfilled "read" call

my $str = '';
my ($sec, $usec, $len);
my @frame;

my $magic = 0xa1b2c3d4;
my $major = 2;
my $minor = 4;
my $zone = 0;
my $sig = 0;
my $snaplen = 0xffff;
my $network = 195; # 802.15.4

print pack('LSSLLLL',($magic,$major,$minor,$zone,$sig,$snaplen,$network));

while(1) {
    my ($count, $c) = $ob->read(1);

    if (defined($count) && ($count != 0)) {
	$str .= $c;
	# match if ends in \n or \r and process line
	if(($str =~ /\n$/) ||
	   ($str =~ /\r$/)) {
	    if($str =~ /^rftest/) {
		#new packet
		($sec, $usec) = gettimeofday;
		print STDERR "rftestline: $sec $usec $str";		
	    } elsif($str =~ /^\s*data/) {
		#packet payload
		print STDERR "dataline: ";		
		print STDERR $str;
		$str =~ /data: 0x\d+ (.+)/;
		my @data = split(' ',$1);
		($len, @data) = @data;
		#write out pcap entry
		print pack('LLLL',($sec,$usec,scalar(@data),scalar(@data)+2));
		print STDERR "new packet: $sec $usec " . scalar(@data) . " " . (scalar(@data)+2) . "\n\r";
		@frame = @data[0,1];
		print pack ('CC',(hex($frame[0]),hex($frame[1])));
		print STDERR "$frame[0] $frame[1] ";
		foreach my $data (@data[2..scalar(@data)-1]) {
		    print pack ('C',hex($data));
		    print STDERR "$data ";
		}		
		print STDERR "\n\r";
	    }
	    print STDERR "\n\r"; 
	    $str = '';
	}
    }
}

$ob -> close or die "Close failed: $!\n";
ReadMode 0;
undef $ob;  # closes port AND frees memory in perl
exit;