Hello,
I am interested in modifying the firmware of the simtrace device to perform modifications on the data sent back to the phone. Is there any documentation on how this can be done? I could not find any on the website. I looked at the source a little bit but I am hoping someone here can give me a jump-start on the best way to do this.
Thanks, Sam W.
Hi,
I am interested in modifying the firmware of the simtrace device to perform modifications on the data sent back to the phone. Is there any documentation on how this can be done? I could not find any on the website. I looked at the source a little bit but I am hoping someone here can give me a jump-start on the best way to do this.
The current simtrace fw is passive listener only AFAIK.
If you want to do MITM you pretty much need an entire new firmware mode, so feed free to design it like you want.
Cheers,
Sylvain
On Thu, Nov 08, 2012 at 08:34:46AM -0800, Samuel Weinbeck wrote:
Hello,
I am interested in modifying the firmware of the simtrace device to perform modifications on the data sent back to the phone. Is there any documentation on how this can be done? I could not find any on the website. I looked at the source a little bit but I am hoping someone here can give me a jump-start on the best way to do this.
Hi,
general information about building and flashing can be found in Chapter 6 of the manual[1]. For manipulation you should operate the bus switch in a way that SIM and SAM, and Phone and SAM are not directly connected. This bus switch configuration is mentioned here[2] It would be nice if you have the time to implement the MITM mode. Please feel free to continue asking technical questions.
holger
[1] http://bb.osmocom.org/trac/raw-attachment/wiki/SIMtrace/usermanual.pdf [2] http://bb.osmocom.org/trac/wiki/SIMtrace/Hardware#Modi
-
Holger Hans Peter Freyther -
Samuel Weinbeck -
Sylvain Munaut