stkn/node-pcsclite
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pcsclite: return SCardGetStatusChange errors

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So it's possible to know when and why pcsc stops watching for events.
This commit is contained in:
Santiago Gimeno
2016-11-24 15:02:57 +01:00
parent 76a1c9a200
commit c311ea038c
2 changed files with 35 additions and 27 deletions
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61
src/pcsclite.cpp
View File

@@ -144,11 +144,8 @@ void PCSCLite::HandleReaderStatusChange(uv_async_t *handle, int status) {
Nan::Callback(Nan::New(async_baton->callback)).Call(argc, argv);
} else {
Local<Value> err = Nan::Error(error_msg("SCardListReaders", ar->result).c_str());
// Prepare the parameters for the callback function.
const unsigned argc = 1;
Local<Value> argv[argc] = { err };
Nan::Callback(Nan::New(async_baton->callback)).Call(argc, argv);
Local<Value> argv[1] = { Nan::Error(ar->err_msg.c_str()) };
Nan::Callback(Nan::New(async_baton->callback)).Call(1, argv);
}
// Do exit, after throwing last events
@@ -186,34 +183,44 @@ void PCSCLite::HandlerFunction(void* arg) {
/* Store the result in the baton */
async_baton->async_result->result = result;
if (result != SCARD_S_SUCCESS) {
async_baton->async_result->err_msg = error_msg("SCardListReaders",
result);
}
/* Notify the nodejs thread */
uv_async_send(&async_baton->async);
if (pcsclite->m_pnp) {
/* Set current status */
pcsclite->m_card_reader_state.dwCurrentState =
pcsclite->m_card_reader_state.dwEventState;
/* Start checking for status change */
result = SCardGetStatusChange(pcsclite->m_card_context,
INFINITE,
&pcsclite->m_card_reader_state,
1);
if (result == SCARD_S_SUCCESS) {
if (pcsclite->m_pnp) {
/* Set current status */
pcsclite->m_card_reader_state.dwCurrentState =
pcsclite->m_card_reader_state.dwEventState;
/* Start checking for status change */
result = SCardGetStatusChange(pcsclite->m_card_context,
INFINITE,
&pcsclite->m_card_reader_state,
1);
uv_mutex_lock(&pcsclite->m_mutex);
if (pcsclite->m_state) {
uv_cond_signal(&pcsclite->m_cond);
uv_mutex_lock(&pcsclite->m_mutex);
async_baton->async_result->result = result;
if (pcsclite->m_state) {
uv_cond_signal(&pcsclite->m_cond);
}
if (result != SCARD_S_SUCCESS) {
pcsclite->m_state = 2;
async_baton->async_result->err_msg =
error_msg("SCardGetStatusChange", result);
}
uv_mutex_unlock(&pcsclite->m_mutex);
} else {
/* If PnP is not supported, just wait for 1 second */
Sleep(1000);
}
if (result != SCARD_S_SUCCESS) {
pcsclite->m_state = 2;
}
uv_mutex_unlock(&pcsclite->m_mutex);
} else if (result == SCARD_S_SUCCESS) {
/* If PnP is not supported, just wait for 1 second */
Sleep(1000);
} else {
/* Error on last card access and no PnP, stop monitoring */
/* Error on last card access, stop monitoring */
pcsclite->m_state = 2;
}
}

1
src/pcsclite.h
View File

@@ -16,6 +16,7 @@ class PCSCLite: public Nan::ObjectWrap {
LPSTR readers_name;
DWORD readers_name_length;
bool do_exit;
std::string err_msg;
};
struct AsyncBaton {