Roadmap for SIMtrace firmware

Hi all! I just waned to give you a heads-up of where I want to be heading with regard to the simtrace firmware. Right now we still use a hacked add-on to the OpenPCD firmware I wrote some 5 years ago. This was a quick way to get something working, as I knew the code base. It has served that purpose: We quickly had a firmware for sniffing mode. That code had been developed before Atmel started to publish ther at91lib software packages which contain a lot of (probably better tested and more portable) code supporting a wide range of Atmel ARM devices. at91lib is especially strong on the USB side, where there are not only implementations of CDC-ACM (serial), CCID (smartcard reader), mass storage, usb-audio, etc. - but also composite devies out of multiple of the above. So what I have in mind for simtrace now is to move forward using at91lib. However, at91lib does (obviously) not support my sam7dfu boot loader / flasher. DFU has been proven an exremely helpful tool for R&D type projects, where you need quick turn-around times for testing new code in absence of a JTAG setup. Using the SAM-BA loader is pretty annoying even after a short time, the constant cycles of usb-plug/unplug, jumper closing and opeing quickly wears out not only your nerves but even the usb plug or socket. I know people who have built USB cables with a power switch in the Vbus line, but even that does only half the trick. So what I'm now doing is adding linker scripts + startup magic to at91lib so it can build .bin files that can be downloaded using the sam7dfu bootloader on the device, and dfu-util on the host PC. Once that is finished, I intend to: * port over the existing 'sniffer mode' code from the openpcd.git repository and 'glue' it behind a CDC-ACM device. This means that in the future, all operatign systems will only see a serial device with APDUs coming out of them. * use the at91lib-provided CCID code to build a second firmware image for a 'reader mode', where the PC can use simtrace as smartcard reader * later merge the two into a single firmware with two alternative USB configurations * finally, add a 'softsim' mode, where the PC can simulate the SIM card to the phone. I'm not sure what I'll do on the USB protocol side for this. Chances are high it's again CDC-ACM - but this time simultaneously with CCID for the reader side, for man-in-the-middle. The advantage here is that we don't need to work with libusb, which apparently can be challenging for users of legacy operating systems ;) Thus, the ideal situation would be a single firmware image that provides three alternate configurations: Sniffer, Cardreader and MITM. Any help is of course very much appreciated. I'll push my at91lib git tree with sam7dfu support as soon as I've done some testing (I'm travelling and unfortunately forgot my 2.5mm jack USB-serial cable). Regards, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)