Tuesday, October 05, 2004
Discovery
The Discovery protocol used by Digi's GUI is undocumented. Maybe you care and maybe you don't. Here's why I care. My customer is shipping 99% of their systems with the standard ConnectMe firmware. Around 1% of their systems ship with some cute application that I wrote loaded into the ConnectMe. My stuff has to be visible to the same tools as the standard stuff. But the Discovery protocol is undocumented.
Digi Tech Support says they're working on the doc and it will be ready Real Soon Now. In the meantime, here is an Ethereal capture of a Discovery session between the GUI and a stock Connectme:
=======================================
PC: DHCP IP 192.168.1.103 MAC 00e098:9190ca
ConnectMe S module: fixed IP 169.254.68.244 MAC 00409D:24A790
from PC:
UDP PC port 3326 (0x0cfe) BROADCAST to port 2362 (0x093a)
0000 01 00 5e 00 05 80 00 e0 98 91 90 ca 08 00 45 00 ..^..... ......E.
0010 00 2a 54 f5 00 00 40 11 7e 3e c0 a8 01 67 e0 00 .*T...@. ~>...g..
0020 05 80 0c fe 09 3a 00 16 b6 60 44 49 47 49 00 01 .....:.. .`DIGI..
0030 00 06 ff ff ff ff ff ff 08 0a 00 00 ........ ....
from ConnectMe:
UDP port 2362 to PC port 3326
0000 00 e0 98 91 90 ca 00 40 9d 24 a7 90 08 00 45 00 .......@ .$....E.
0010 00 81 00 0e 00 00 3c 11 cd 5c a9 fe 44 f4 c0 a8 ......<. .\..D...
0020 01 67 09 3a 0c fe 00 6d d7 6e 44 49 47 49 00 02 .g.:...m .nDIGI..
0030 00 5d 01 06 00 40 9d 24 a7 90 02 04 a9 fe 44 f4 .]...@.$ ......D.
0040 03 04 ff ff 00 00 0b 04 00 00 00 00 0d 0f 44 69 ........ ......Di
0050 67 69 20 43 6f 6e 6e 65 63 74 20 4d 45 07 01 00 gi Conne ct ME...
0060 08 1d 56 65 72 73 69 6f 6e 20 38 32 30 30 30 38 ..Versio n 820008
0070 35 36 5f 45 20 30 37 2f 30 31 2f 32 30 30 34 0e 56_E 07/ 01/2004.
0080 04 00 00 03 03 10 01 01 12 01 01 0c 02 00 01 ........ .......
-------------
I have reversed the protocol based on this and similar experiments, and my application works Ok. If you need the protocol, please pound on Digi for it. If they don't help you, and you don't have any luck reversing it, contact me and we can work something out.
Larry Martin
www.GlueLogix.com
Copyright (c) 2004 Larry Martin. All Rights reserved.
Digi Tech Support says they're working on the doc and it will be ready Real Soon Now. In the meantime, here is an Ethereal capture of a Discovery session between the GUI and a stock Connectme:
=======================================
PC: DHCP IP 192.168.1.103 MAC 00e098:9190ca
ConnectMe S module: fixed IP 169.254.68.244 MAC 00409D:24A790
from PC:
UDP PC port 3326 (0x0cfe) BROADCAST to port 2362 (0x093a)
0000 01 00 5e 00 05 80 00 e0 98 91 90 ca 08 00 45 00 ..^..... ......E.
0010 00 2a 54 f5 00 00 40 11 7e 3e c0 a8 01 67 e0 00 .*T...@. ~>...g..
0020 05 80 0c fe 09 3a 00 16 b6 60 44 49 47 49 00 01 .....:.. .`DIGI..
0030 00 06 ff ff ff ff ff ff 08 0a 00 00 ........ ....
from ConnectMe:
UDP port 2362 to PC port 3326
0000 00 e0 98 91 90 ca 00 40 9d 24 a7 90 08 00 45 00 .......@ .$....E.
0010 00 81 00 0e 00 00 3c 11 cd 5c a9 fe 44 f4 c0 a8 ......<. .\..D...
0020 01 67 09 3a 0c fe 00 6d d7 6e 44 49 47 49 00 02 .g.:...m .nDIGI..
0030 00 5d 01 06 00 40 9d 24 a7 90 02 04 a9 fe 44 f4 .]...@.$ ......D.
0040 03 04 ff ff 00 00 0b 04 00 00 00 00 0d 0f 44 69 ........ ......Di
0050 67 69 20 43 6f 6e 6e 65 63 74 20 4d 45 07 01 00 gi Conne ct ME...
0060 08 1d 56 65 72 73 69 6f 6e 20 38 32 30 30 30 38 ..Versio n 820008
0070 35 36 5f 45 20 30 37 2f 30 31 2f 32 30 30 34 0e 56_E 07/ 01/2004.
0080 04 00 00 03 03 10 01 01 12 01 01 0c 02 00 01 ........ .......
-------------
I have reversed the protocol based on this and similar experiments, and my application works Ok. If you need the protocol, please pound on Digi for it. If they don't help you, and you don't have any luck reversing it, contact me and we can work something out.
Larry Martin
www.GlueLogix.com
Copyright (c) 2004 Larry Martin. All Rights reserved.
# posted by Larry Martin @ 7:10 PM 
Comments:
<< Home
I've recently been doing some work on a consumer device that uses a Digi Connect ME and had a need to reverse the ADDP or "Advanced Digi Discovery Protocol". You can find my notes and a sample Python script at http://kelley.ca/wordpress/2008/10/24/digi-connect-me-discovery/
Post a Comment
<< Home
