Tmphack

Hacking the HDX-1000 media player.

Firmware analysis

The HDX-1000 minidevice player seems to communicate on port 1441.

The bytes captured are:

host <<=>> minidevice  Run 1
======================
>> port 1441 Syn?
<< Syn!

>> 04 "0900" 05     # 04 = new request ? The response seems to be, 01 stuff, 02 stuff, 03 stuff, 04 end
<< 01 "0001" 02 "09000021800000000080000000" 03 09
>> 10 30            # something
<< 04               # 04 = ok?

>> 04 "0700" 05     # new request  ?
<< "0700" 04        # empty?
>> 04 "0600" 05     #    ?
<< 01 "0001" 02 "longstringofdata" 03 0d     # lots of data
>> 10 30            # something? (clear?)
<< 04               # ok

>> 04 "1901" 05     # request for 1901?
<< 10 30            
>> 01 "0002" 02 "1911            " 03 0b   # spaces, normal 01,02,03 reply, but what is it
<< 10 31            # 10 31 now
>> 04               # ok

>> 04 "0600" 05     # again, give me 0600 again?
<< "0600" 04        # now its empty
>> Fin
<< Fin

The longstring of data, appears to contain:

01
30 3030 31                    "0001"
02 
#Start of record, total of 8 records this time
3331                          "31"
3230 3038 3130 3033 3038 3436 "200810030846"   # known
3030 3031                     "0001"
3030 3030 3030 3132 3232      "0000001222"     # known
3030 3031                     "0001" 
#Start of next record
3331                          "31"
... etc ..
3030 3031                     "0001" 
# end
03 0d

host <<=>> minidevice  Run 2
======================

>> 04 "0900" 05
<< 01 "0001" 02 "09000021800000000240000000              " 03 07
>> 10 30
<< 04

>> 04 "0700" 05
<< "0700" 04

>> 04 "0600" 05
<< 01 "0001"
<< 02 "longstringdata" 03 0e
>> 10 30
<< 01 "0001" 
<< 02 "more long data" 03 0e
>> 10 30
<< 01 "0001" 
<< 02 "more long data" 03 04
>> 10 30
<< 04

>> 04 "1901" 05
<< 10 30

>> 01 "0002" 02 "1911            " 03 0b
<< 10 31
>> 04

>> 04 "0600" 05
<< "0600" 04

>> Fin
<< Fin