Hi, I'm also in favor for BTSAP. I personally find the protocol fairly sane and like Kevin mentioned there is also already the SAP server implementation in the osmocom repositories.
* jolly andreas@eversberg.eu [2011-11-07 17:31]:
nice work. i like the idea that BTSAP is used by layer23. this was my intention when i added the sap_interface.c. not only that layer23 can use softsim as reader, but also other btsap clients could use osmocombb as reader.
I didn't even think of this option so far, but it's a good idea and shouldn't be too difficult to add to the current code!
to make this possible, the next step would be adding the btsap server socket to osmocon. (currently it only provides a socket for L1CTL.) also layer1 sim reader would require to get a btsap compatible interface.
there is only one thing i disagree: you implemented function in the VTY to set the socket. this is already done in the configurations of each mobile instance. i would suggest that you open the socket (osmosap_init(ms)) at app_mobile.c when the instance is started (no shutdown), in case the socket is given. then, if the mobile instance starts working, the socket will be connected and the sim client will read the sim as soon as the socket is connected.
I totally agree. I think the reason I did it this way was for simplicity because when the reader and the SAP interface are activated manually subsequently, the ATR command will already have it's reply. If it's not done this way the mobile application would have to wait for it to complete because the process is fairly slow. But the cleaner way would be app_mobile.c. I can work on that but will likely need some time due to various other commitments at the moment.
Kind regards Nico