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