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#include <errno.h>
#include <QtBluetooth/QBluetoothAddress>
#include <QLowEnergyController>
#include <QEventLoop>
#include <QTimer>
#include <QDebug>
#include <libdivecomputer/version.h>
#include "libdivecomputer.h"
#include "core/qt-ble.h"
#if defined(SSRF_CUSTOM_IO)
#include <libdivecomputer/custom_io.h>
extern "C" {
void BLEObject::serviceStateChanged(QLowEnergyService::ServiceState s)
{
QList<QLowEnergyCharacteristic> list;
list = service->characteristics();
Q_FOREACH(QLowEnergyCharacteristic c, list) {
fprintf(stderr, " %s\n", c.uuid().toString().toUtf8().data());
}
}
void BLEObject::characteristcStateChanged(const QLowEnergyCharacteristic &c, const QByteArray &value)
{
receivedPackets.append(value);
waitForPacket.exit();
}
void BLEObject::writeCompleted(const QLowEnergyDescriptor &d, const QByteArray &value)
{
fprintf(stderr, "Write completed\n");
}
void BLEObject::addService(const QBluetoothUuid &newService)
{
const char *uuid = newService.toString().toUtf8().data();
fprintf(stderr, "Found service %s\n", uuid);
if (uuid[1] == '0') {
fprintf(stderr, " .. ignoring\n");
return;
}
service = controller->createServiceObject(newService, this);
fprintf(stderr, " .. created service object %p\n", service);
if (service) {
connect(service, &QLowEnergyService::stateChanged, this, &BLEObject::serviceStateChanged);
connect(service, &QLowEnergyService::characteristicChanged, this, &BLEObject::characteristcStateChanged);
connect(service, &QLowEnergyService::descriptorWritten, this, &BLEObject::writeCompleted);
service->discoverDetails();
}
}
BLEObject::BLEObject(QLowEnergyController *c)
{
controller = c;
}
BLEObject::~BLEObject()
{
fprintf(stderr, "Deleting BLE object\n");
}
dc_status_t BLEObject::write(const void* data, size_t size, size_t *actual)
{
QList<QLowEnergyCharacteristic> list = service->characteristics();
QByteArray bytes((const char *)data, (int) size);
if (!list.isEmpty()) {
const QLowEnergyCharacteristic &c = list.constFirst();
QLowEnergyService::WriteMode mode;
mode = (c.properties() & QLowEnergyCharacteristic::WriteNoResponse) ?
QLowEnergyService::WriteWithoutResponse :
QLowEnergyService::WriteWithResponse;
service->writeCharacteristic(c, bytes, mode);
return DC_STATUS_SUCCESS;
}
return DC_STATUS_IO;
}
dc_status_t BLEObject::read(void* data, size_t size, size_t *actual)
{
if (receivedPackets.isEmpty()) {
QList<QLowEnergyCharacteristic> list = service->characteristics();
if (list.isEmpty())
return DC_STATUS_IO;
const QLowEnergyCharacteristic &c = list.constLast();
QTimer timer;
int msec = 5000;
timer.setSingleShot(true);
waitForPacket.connect(&timer, SIGNAL(timeout()), SLOT(quit()));
timer.start(msec);
waitForPacket.exec();
}
// Still no packet?
if (receivedPackets.isEmpty())
return DC_STATUS_IO;
QByteArray packet = receivedPackets.takeFirst();
if (size > packet.size())
size = packet.size();
memcpy(data, packet.data(), size);
*actual = size;
return DC_STATUS_SUCCESS;
}
dc_status_t qt_ble_open(dc_custom_io_t *io, dc_context_t *context, const char *devaddr)
{
QBluetoothAddress remoteDeviceAddress(devaddr);
// HACK ALERT! Qt 5.9 needs this for proper Bluez operation
qputenv("QT_DEFAULT_CENTRAL_SERVICES", "1");
QLowEnergyController *controller = new QLowEnergyController(remoteDeviceAddress);
fprintf(stderr, "qt_ble_open(%s)\n", devaddr);
// Wait until the connection succeeds or until an error occurs
QEventLoop loop;
loop.connect(controller, SIGNAL(connected()), SLOT(quit()));
loop.connect(controller, SIGNAL(error(QLowEnergyController::Error)), SLOT(quit()));
// Create a timer. If the connection doesn't succeed after five seconds or no error occurs then stop the opening step
QTimer timer;
int msec = 5000;
timer.setSingleShot(true);
loop.connect(&timer, SIGNAL(timeout()), SLOT(quit()));
// Try to connect to the device
controller->connectToDevice();
timer.start(msec);
loop.exec();
switch (controller->state()) {
case QLowEnergyController::ConnectedState:
break;
default:
report_error("Failed to connect to %s: '%s'", devaddr, controller->errorString().toUtf8().data());
controller->disconnectFromDevice();
delete controller;
return DC_STATUS_IO;
}
fprintf(stderr, "Connected to device %s\n", devaddr);
/* We need to discover services etc here! */
BLEObject *ble = new BLEObject(controller);
loop.connect(controller, SIGNAL(discoveryFinished()), SLOT(quit()));
ble->connect(controller, SIGNAL(serviceDiscovered(QBluetoothUuid)), SLOT(addService(QBluetoothUuid)));
fprintf(stderr, " .. discovering services\n");
controller->discoverServices();
timer.start(msec);
loop.exec();
fprintf(stderr, " .. done discovering services\n");
fprintf(stderr, " .. discovering details\n");
timer.start(msec);
loop.exec();
fprintf(stderr, " .. done waiting\n");
fprintf(stderr, " .. enabling notifications\n");
/* Enable notifications */
QList<QLowEnergyCharacteristic> list = ble->service->characteristics();
if (!list.isEmpty()) {
const QLowEnergyCharacteristic &c = list.constLast();
QList<QLowEnergyDescriptor> l = c.descriptors();
fprintf(stderr, "Descriptor list (%p, %d)\n", l, l.length());
if (!l.isEmpty()) {
QLowEnergyDescriptor d = l.first();
fprintf(stderr, "Descriptor: %s uuid: %s\n", d.name().toUtf8().data(), d.uuid().toString().toUtf8().data());
ble->service->writeDescriptor(d, QByteArray::fromHex("0100"));
}
}
// Fill in info
io->userdata = (void *)ble;
return DC_STATUS_SUCCESS;
}
dc_status_t qt_ble_close(dc_custom_io_t *io)
{
BLEObject *ble = (BLEObject *) io->userdata;
io->userdata = NULL;
delete ble;
return DC_STATUS_SUCCESS;
}
dc_status_t qt_ble_read(dc_custom_io_t *io, void* data, size_t size, size_t *actual)
{
BLEObject *ble = (BLEObject *) io->userdata;
return ble->read(data, size, actual);
}
dc_status_t qt_ble_write(dc_custom_io_t *io, const void* data, size_t size, size_t *actual)
{
BLEObject *ble = (BLEObject *) io->userdata;
return ble->write(data, size, actual);
}
} /* extern "C" */
#endif
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