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re-implemented auto-detect feature

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This commit is contained in:
Frank Morgner
2012-08-03 14:21:24 +02:00
parent 26591f431e
commit 450cf13e66
1 changed files with 21 additions and 3 deletions
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24
pcsc-relay/src/pcsc.c
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@@ -51,7 +51,8 @@ struct pcsc_data {
unsigned int readernum = -1;
#define READERNUM_AUTODETECT -1
unsigned int readernum = READERNUM_AUTODETECT;
static int pcsc_connect(driver_data_t **driver_data)
@@ -60,6 +61,7 @@ static int pcsc_connect(driver_data_t **driver_data)
LONG r;
DWORD readerslen = SCARD_AUTOALLOCATE;
SCARD_READERSTATE state;
LPSTR readers = NULL;
char *reader;
size_t l, i;
@@ -94,8 +96,24 @@ static int pcsc_connect(driver_data_t **driver_data)
for (reader = readers, i = 0; readerslen > 0;
l = strlen(reader)+1, readerslen -= l, reader += l, i++) {
if (i == readernum)
break;
if (i == readernum || readernum == READERNUM_AUTODETECT) {
state.szReader = reader;
state.dwCurrentState = SCARD_STATE_UNAWARE;
r = SCardGetStatusChange(data->hContext, 0, &state, 1);
if (r != SCARD_S_SUCCESS) {
RELAY_ERROR("Could not get status of %s\n", reader);
goto err;
}
if (state.dwEventState & SCARD_STATE_PRESENT)
break;
if (i == readernum) {
RELAY_ERROR("No card present in %s\n", reader);
goto err;
}
}
}
if (readerslen <= 0) {
RELAY_ERROR("Could not find reader number %u\n", readernum);