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armsrc: put new frame parsing in common for usart (still usart_read_ng to do)

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This commit is contained in:
Philippe Teuwen 2019-04-20 01:47:50 +02:00
commit a45238236d
5 changed files with 37 additions and 28 deletions
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30
common/cmd.c
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@ -135,9 +135,11 @@ int16_t reply_ng(uint16_t cmd, int16_t status, uint8_t *data, size_t len) {
return sendlen;
}
int16_t receive_ng(PacketCommandNG *rx) {
static int16_t receive_ng_internal(PacketCommandNG *rx, uint32_t read_ng(uint8_t *data, size_t len), bool fpc) {
PacketCommandNGRaw rx_raw;
size_t bytes = usb_read_ng((uint8_t *)&rx_raw.pre, sizeof(PacketCommandNGPreamble));
size_t bytes = read_ng((uint8_t *)&rx_raw.pre, sizeof(PacketCommandNGPreamble));
if (bytes == 0)
return PM3_NODATA;
if (bytes != sizeof(PacketCommandNGPreamble))
return PM3_EIO;
rx->magic = rx_raw.pre.magic;
@ -147,12 +149,12 @@ int16_t receive_ng(PacketCommandNG *rx) {
if (rx->length > USB_CMD_DATA_SIZE)
return PM3_EOVFLOW;
// Get the core and variable length payload
bytes = usb_read_ng((uint8_t *)&rx_raw.data, rx->length);
bytes = read_ng((uint8_t *)&rx_raw.data, rx->length);
if (bytes != rx->length)
return PM3_EIO;
memcpy(rx->data.asBytes, rx_raw.data, rx->length);
// Get the postamble
bytes = usb_read_ng((uint8_t *)&rx_raw.foopost, sizeof(PacketCommandNGPostamble));
bytes = read_ng((uint8_t *)&rx_raw.foopost, sizeof(PacketCommandNGPostamble));
if (bytes != sizeof(PacketCommandNGPostamble))
return PM3_EIO;
// Check CRC, accept MAGIC as placeholder
@ -163,15 +165,15 @@ int16_t receive_ng(PacketCommandNG *rx) {
if ((first << 8) + second != rx->crc)
return PM3_EIO;
}
reply_via_fpc = false;
reply_via_fpc = fpc;
rx->ng = true;
} else { // Old style command
PacketCommandOLD rx_old;
memcpy(&rx_old, &rx_raw.pre, sizeof(PacketCommandNGPreamble));
bytes = usb_read_ng(((uint8_t *)&rx_old) + sizeof(PacketCommandNGPreamble), sizeof(PacketCommandOLD) - sizeof(PacketCommandNGPreamble));
bytes = read_ng(((uint8_t *)&rx_old) + sizeof(PacketCommandNGPreamble), sizeof(PacketCommandOLD) - sizeof(PacketCommandNGPreamble));
if (bytes != sizeof(PacketCommandOLD) - sizeof(PacketCommandNGPreamble))
return PM3_EIO;
reply_via_fpc = false;
reply_via_fpc = fpc;
rx->ng = false;
rx->magic = 0;
rx->crc = 0;
@ -184,3 +186,17 @@ int16_t receive_ng(PacketCommandNG *rx) {
}
return PM3_SUCCESS;
}
int16_t receive_ng(PacketCommandNG *rx) {
// Check if there is a packet available
if (usb_poll_validate_length())
return receive_ng_internal(rx, usb_read_ng, false);
#ifdef WITH_FPC_HOST
// Check if there is a FPC packet available
return receive_ng_internal(rx, usart_read_ng, true);
#else
return PM3_NODATA;
#endif
}