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Report errors of ACR122 devices in the transceive function.

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This commit is contained in:
Romain Tartiere 2010-08-28 14:25:49 +00:00
parent a676d34e5d
commit af291c5a16
1 changed files with 30 additions and 8 deletions
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38
libnfc/drivers/acr122.c
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@ -41,7 +41,7 @@
#include <wintypes.h>
#endif
#include <nfc/nfc.h>
#include <nfc/nfc-messages.h>
// WINDOWS: #define IOCTL_CCID_ESCAPE_SCARD_CTL_CODE SCARD_CTL_CODE(3500)
@ -264,8 +264,12 @@ bool acr122_transceive(nfc_device_t* pnd, const byte_t* pbtTx, const size_t szTx
byte_t abtTxBuf[ACR122_WRAP_LEN+ACR122_COMMAND_LEN] = { 0xFF, 0x00, 0x00, 0x00 };
acr122_spec_t* pas = (acr122_spec_t*)pnd->nds;
// FIXME: Should be handled by the library.
// Make sure the command does not overflow the send buffer
if (szTxLen > ACR122_COMMAND_LEN) return false;
if (szTxLen > ACR122_COMMAND_LEN) {
pnd->iLastError = DEIO;
return false;
}
// Store the length of the command we are going to send
abtTxBuf[4] = szTxLen;
@ -279,23 +283,38 @@ bool acr122_transceive(nfc_device_t* pnd, const byte_t* pbtTx, const size_t szTx
if (pas->ioCard.dwProtocol == SCARD_PROTOCOL_UNDEFINED)
{
if (SCardControl(pas->hCard,IOCTL_CCID_ESCAPE_SCARD_CTL_CODE,abtTxBuf,szTxLen+5,abtRxBuf,szRxBufLen,(void*)&szRxBufLen) != SCARD_S_SUCCESS) return false;
if (SCardControl(pas->hCard,IOCTL_CCID_ESCAPE_SCARD_CTL_CODE,abtTxBuf,szTxLen+5,abtRxBuf,szRxBufLen,(void*)&szRxBufLen) != SCARD_S_SUCCESS) {
pnd->iLastError = DEIO;
return false;
}
} else {
if (SCardTransmit(pas->hCard,&(pas->ioCard),abtTxBuf,szTxLen+5,NULL,abtRxBuf,(void*)&szRxBufLen) != SCARD_S_SUCCESS) return false;
if (SCardTransmit(pas->hCard,&(pas->ioCard),abtTxBuf,szTxLen+5,NULL,abtRxBuf,(void*)&szRxBufLen) != SCARD_S_SUCCESS) {
pnd->iLastError = DEIO;
return false;
}
}
if (pas->ioCard.dwProtocol == SCARD_PROTOCOL_T0)
{
// Make sure we received the byte-count we expected
if (szRxBufLen != 2) return false;
if (szRxBufLen != 2) {
pnd->iLastError = DEIO;
return false;
}
// Check if the operation was successful, so an answer is available
if (*abtRxBuf == SCARD_OPERATION_ERROR) return false;
if (*abtRxBuf == SCARD_OPERATION_ERROR) {
pnd->iLastError = DEISERRFRAME;
return false;
}
// Retrieve the response bytes
abtRxCmd[4] = abtRxBuf[1];
szRxBufLen = sizeof(abtRxBuf);
if (SCardTransmit(pas->hCard,&(pas->ioCard),abtRxCmd,szRxCmdLen,NULL,abtRxBuf,(void*)&szRxBufLen) != SCARD_S_SUCCESS) return false;
if (SCardTransmit(pas->hCard,&(pas->ioCard),abtRxCmd,szRxCmdLen,NULL,abtRxBuf,(void*)&szRxBufLen) != SCARD_S_SUCCESS) {
pnd->iLastError = DEIO;
return false;
}
}
#ifdef DEBUG
@ -306,7 +325,10 @@ bool acr122_transceive(nfc_device_t* pnd, const byte_t* pbtTx, const size_t szTx
if (pbtRx == NULL || pszRxLen == NULL) return true;
// Make sure we have an emulated answer that fits the return buffer
if (szRxBufLen < 4 || (szRxBufLen-4) > *pszRxLen) return false;
if (szRxBufLen < 4 || (szRxBufLen-4) > *pszRxLen) {
pnd->iLastError = DEIO;
return false;
}
// Wipe out the 4 APDU emulation bytes: D5 4B .. .. .. 90 00
*pszRxLen = ((size_t)szRxBufLen)-4;
memcpy(pbtRx,abtRxBuf+2,*pszRxLen);