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sniff mode: handle USART 1 RX interrupt to show sniffer data 

Change-Id: I5504369aed39844b7cf21e5b3ccb542daa6b946e
This commit is contained in:
Kevin Redon 2018-06-06 16:13:48 +02:00 committed by Harald Welte
parent 36abece0b1
commit 7b73462442
3 changed files with 36 additions and 2 deletions
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1
firmware/apps/trace/main.c
View File

@ -36,6 +36,7 @@ static const conf_func config_func_ptrs[] = {
.init = Sniffer_init,
.exit = Sniffer_exit,
.run = Sniffer_run,
.usart1_irq = Sniffer_usart1_irq,
},
#endif
#ifdef HAVE_CCID

2
firmware/libcommon/include/simtrace.h
View File

@ -108,6 +108,8 @@ extern void CCID_run( void );
extern void mode_cardemu_run(void);
extern void MITM_run( void );
/* IRQ functions */
extern void Sniffer_usart1_irq(void);
extern void mode_cardemu_usart0_irq(void);
extern void mode_cardemu_usart1_irq(void);

35
firmware/libcommon/source/sniffer.c
View File

@ -58,7 +58,7 @@ static const Pin pPwr[] = {
/* Enable power converter 4.5-6V to 3.3V; low: off */
{SIM_PWEN, PIOA, ID_PIOA, PIO_OUTPUT_0, PIO_DEFAULT},
/* Enable second power converter: VCC_PHONE to VCC_SIM; high: on */
/* Enable power forwarding: VCC_PHONE to VCC_SIM; high: on */
{VCC_FWD, PIOA, ID_PIOA, PIO_OUTPUT_1, PIO_DEFAULT}
};
@ -68,10 +68,37 @@ static struct Usart_info usart_info = {
.state = USART_RCV,
};
/* Ring buffer to store sniffer communication data */
static struct ringbuf sniff_buffer;
/*------------------------------------------------------------------------------
* Global functions
*------------------------------------------------------------------------------*/
void Sniffer_usart1_irq(void)
{
/* Read channel status register */
uint32_t csr = usart_info.base->US_CSR & usart_info.base->US_IMR;
/* Verify if character has been received */
if (csr & US_CSR_RXRDY) {
/* Read communication data byte between phone and SIM */
uint8_t byte = usart_info.base->US_RHR;
/* Store sniffed data into buffer (also clear interrupt */
rbuf_write(&sniff_buffer, byte);
}
}
/*------------------------------------------------------------------------------
* Internal functions
*------------------------------------------------------------------------------*/
int check_data_from_phone(void)
{
TRACE_INFO("check data from phone\n\r");
/* Display sniffed data */
while (!rbuf_is_empty(&sniff_buffer)) {
uint8_t byte = rbuf_read(&sniff_buffer);
TRACE_INFO_WP("0x%02x ", byte);
}
}
/*-----------------------------------------------------------------------------
@ -97,6 +124,10 @@ void Sniffer_exit(void)
void Sniffer_init(void)
{
TRACE_INFO("Sniffer Init\n\r");
/* Clear ring buffer containing the sniffed data */
rbuf_reset(&sniff_buffer);
/* Configure ISO7816 driver */
PIO_Configure(pinsISO7816_sniff, PIO_LISTSIZE(pinsISO7816_sniff));
PIO_Configure(pins_bus, PIO_LISTSIZE(pins_bus));