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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/copresence_sockets/public/copresence_peer.h"
#include <stdint.h>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/format_macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/rand_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
#include "components/copresence_sockets/transports/bluetooth/copresence_socket_bluetooth.h"
#include "device/bluetooth/bluetooth_adapter.h"
#include "device/bluetooth/bluetooth_adapter_factory.h"
#include "device/bluetooth/bluetooth_device.h"
#include "device/bluetooth/bluetooth_socket.h"
#include "device/bluetooth/bluetooth_uuid.h"
namespace {
const char kAdapterError[] = "NOADAPTER";
device::BluetoothUUID GenerateRandomUuid() {
// Random hex string of the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
return device::BluetoothUUID(base::StringPrintf(
"%08" PRIx64 "-%04" PRIx64 "-%04" PRIx64 "-%04" PRIx64 "-%012" PRIx64,
base::RandGenerator(UINT32_MAX),
base::RandGenerator(UINT16_MAX),
base::RandGenerator(UINT16_MAX),
base::RandGenerator(UINT16_MAX),
base::RandGenerator(static_cast<uint64>(UINT16_MAX) + UINT32_MAX)));
}
// This class will confirm pairing for a device that is expecting a pairing
// confirmation.
class DefaultApprovalDelegate
: public device::BluetoothDevice::PairingDelegate {
public:
DefaultApprovalDelegate() {}
~DefaultApprovalDelegate() override {}
// device::BluetoothDevice::PairingDelegate overrides:
void RequestPinCode(device::BluetoothDevice* device) override {}
void RequestPasskey(device::BluetoothDevice* device) override {}
void DisplayPinCode(device::BluetoothDevice* device,
const std::string& pincode) override {}
void DisplayPasskey(device::BluetoothDevice* device,
uint32 passkey) override {}
void KeysEntered(device::BluetoothDevice* device, uint32 entered) override {}
void ConfirmPasskey(device::BluetoothDevice* device,
uint32 passkey) override {}
void AuthorizePairing(device::BluetoothDevice* device) override {
if (device->ExpectingConfirmation())
device->ConfirmPairing();
}
};
} // namespace
namespace copresence_sockets {
CopresencePeer::CopresencePeer(const CreatePeerCallback& create_callback,
const AcceptCallback& accept_callback)
: create_callback_(create_callback),
accept_callback_(accept_callback),
delegate_(nullptr),
weak_ptr_factory_(this) {
DCHECK(!create_callback.is_null());
DCHECK(!accept_callback.is_null());
if (!device::BluetoothAdapterFactory::IsBluetoothAdapterAvailable()) {
create_callback_.Run(std::string());
return;
}
device::BluetoothAdapterFactory::GetAdapter(base::Bind(
&CopresencePeer::OnGetAdapter, weak_ptr_factory_.GetWeakPtr()));
}
std::string CopresencePeer::GetLocatorData() {
if (!adapter_.get())
return kAdapterError;
// TODO(rkc): Fix the "1." once we have finalized the locator format with
// other platforms. http://crbug.com/418616
return "1." + adapter_->GetAddress() + "." + service_uuid_.value();
}
CopresencePeer::~CopresencePeer() {
server_socket_->Disconnect(base::Bind(&base::DoNothing));
server_socket_->Close();
if (delegate_)
adapter_->RemovePairingDelegate(delegate_.get());
}
// Private methods.
void CopresencePeer::OnGetAdapter(
scoped_refptr<device::BluetoothAdapter> adapter) {
if (!adapter.get() || !adapter->IsPresent() || !adapter->IsPowered()) {
create_callback_.Run(std::string());
return;
}
adapter_ = adapter;
service_uuid_ = GenerateRandomUuid();
delegate_ = make_scoped_ptr(new DefaultApprovalDelegate());
VLOG(2) << "Creating service with UUID: " << service_uuid_.value();
adapter_->AddPairingDelegate(
delegate_.get(),
device::BluetoothAdapter::PAIRING_DELEGATE_PRIORITY_HIGH);
adapter_->CreateRfcommService(
service_uuid_,
device::BluetoothAdapter::ServiceOptions(),
base::Bind(&CopresencePeer::OnCreateService,
weak_ptr_factory_.GetWeakPtr()),
base::Bind(&CopresencePeer::OnCreateServiceError,
weak_ptr_factory_.GetWeakPtr()));
}
void CopresencePeer::OnCreateService(
scoped_refptr<device::BluetoothSocket> socket) {
if (!socket.get()) {
create_callback_.Run(std::string());
return;
}
server_socket_ = socket;
create_callback_.Run(GetLocatorData());
server_socket_->Accept(
base::Bind(&CopresencePeer::OnAccept, weak_ptr_factory_.GetWeakPtr()),
base::Bind(&CopresencePeer::OnAcceptError,
weak_ptr_factory_.GetWeakPtr()));
}
void CopresencePeer::OnCreateServiceError(const std::string& message) {
LOG(WARNING) << "Couldn't create Bluetooth service: " << message;
create_callback_.Run(std::string());
}
void CopresencePeer::OnAccept(const device::BluetoothDevice* device,
scoped_refptr<device::BluetoothSocket> socket) {
if (!socket.get())
return;
accept_callback_.Run(make_scoped_ptr(new CopresenceSocketBluetooth(socket)));
}
void CopresencePeer::OnAcceptError(const std::string& message) {
LOG(WARNING) << "Couldn't accept Bluetooth connection: " << message;
}
} // namespace copresence_sockets
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