Prototype for copresenceSockets.

components/copresence_sockets/copresence_peer.cc

+// 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() {}
+  virtual ~DefaultApprovalDelegate() {}
+
+  // device::BluetoothDevice::PairingDelegate overrides:
+  virtual void RequestPinCode(device::BluetoothDevice* device) override {}
+  virtual void RequestPasskey(device::BluetoothDevice* device) override {}
+  virtual void DisplayPinCode(device::BluetoothDevice* device,
+                              const std::string& pincode) override {}
+  virtual void DisplayPasskey(device::BluetoothDevice* device,
+                              uint32 passkey) override {}
+  virtual void KeysEntered(device::BluetoothDevice* device,
+                           uint32 entered) override {}
+  virtual void ConfirmPasskey(device::BluetoothDevice* device,
+                              uint32 passkey) override {}
+  virtual 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