device/bluetooth/bluetooth_socket_win.cc - chromium/src - Git at Google

 // Copyright (c) 2012 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 "device/bluetooth/bluetooth_socket_win.h"

 #include <objbase.h>

 #include <memory>
 #include <string>
 #include <utility>

 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/sequenced_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "device/bluetooth/bluetooth_device_win.h"
 #include "device/bluetooth/bluetooth_init_win.h"
 #include "device/bluetooth/bluetooth_service_record_win.h"
 #include "device/bluetooth/bluetooth_socket_thread.h"
 #include "net/base/io_buffer.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
 #include "net/base/winsock_init.h"
 #include "net/base/winsock_util.h"

 namespace {

 const char kL2CAPNotSupported[] = "Bluetooth L2CAP protocal is not supported";
 const char kSocketAlreadyConnected[] = "Socket is already connected.";
 const char kInvalidRfcommPort[] = "Invalid RFCCOMM port.";
 const char kFailedToCreateSocket[] = "Failed to create socket.";
 const char kFailedToBindSocket[] = "Failed to bind socket.";
 const char kFailedToListenOnSocket[] = "Failed to listen on socket.";
 const char kFailedToGetSockNameForSocket[] = "Failed to getsockname.";
 const char kFailedToAccept[] = "Failed to accept.";
 const char kInvalidUUID[] = "Invalid UUID";
 const char kWsaSetServiceError[] = "WSASetService error.";

 std::string IPEndPointToBluetoothAddress(const net::IPEndPoint& end_point) {
   if (end_point.address().size() != net::kBluetoothAddressSize)
     return std::string();
   // The address is copied from BTH_ADDR field of SOCKADDR_BTH, which is a
   // 64-bit ULONGLONG that stores Bluetooth address in little-endian. Print in
   // reverse order to preserve the correct ordering.
   return base::StringPrintf(
       "%02X:%02X:%02X:%02X:%02X:%02X", end_point.address().bytes()[5],
       end_point.address().bytes()[4], end_point.address().bytes()[3],
       end_point.address().bytes()[2], end_point.address().bytes()[1],
       end_point.address().bytes()[0]);
 }

 }  // namespace

 namespace device {

 struct BluetoothSocketWin::ServiceRegData {
   ServiceRegData() {
     ZeroMemory(&address, sizeof(address));
     ZeroMemory(&address_info, sizeof(address_info));
     ZeroMemory(&uuid, sizeof(uuid));
     ZeroMemory(&service, sizeof(service));
   }

   SOCKADDR_BTH address;
   CSADDR_INFO address_info;
   GUID uuid;
   base::string16 name;
   WSAQUERYSET service;
 };

 // static
 scoped_refptr<BluetoothSocketWin>
 BluetoothSocketWin::CreateBluetoothSocket(
     scoped_refptr<base::SequencedTaskRunner> ui_task_runner,
     scoped_refptr<device::BluetoothSocketThread> socket_thread) {
   DCHECK(ui_task_runner->RunsTasksOnCurrentThread());

   return make_scoped_refptr(
       new BluetoothSocketWin(ui_task_runner, socket_thread));
 }

 BluetoothSocketWin::BluetoothSocketWin(
     scoped_refptr<base::SequencedTaskRunner> ui_task_runner,
     scoped_refptr<BluetoothSocketThread> socket_thread)
     : BluetoothSocketNet(ui_task_runner, socket_thread),
       supports_rfcomm_(false),
       rfcomm_channel_(0xFF),
       bth_addr_(BTH_ADDR_NULL) {
 }

 BluetoothSocketWin::~BluetoothSocketWin() {
 }

 void BluetoothSocketWin::Connect(
     const BluetoothDeviceWin* device,
     const BluetoothUUID& uuid,
     const base::Closure& success_callback,
     const ErrorCompletionCallback& error_callback) {
   DCHECK(ui_task_runner()->RunsTasksOnCurrentThread());
   DCHECK(device);

   if (!uuid.IsValid()) {
     error_callback.Run(kInvalidUUID);
     return;
   }

   const BluetoothServiceRecordWin* service_record_win =
       device->GetServiceRecord(uuid);
   if (!service_record_win) {
     error_callback.Run(kInvalidUUID);
     return;
   }

   device_address_ = service_record_win->device_address();
   if (service_record_win->SupportsRfcomm()) {
     supports_rfcomm_ = true;
     rfcomm_channel_ = service_record_win->rfcomm_channel();
     bth_addr_ = service_record_win->device_bth_addr();
   }

   socket_thread()->task_runner()->PostTask(
       FROM_HERE,
       base::Bind(
           &BluetoothSocketWin::DoConnect,
           this,
           base::Bind(&BluetoothSocketWin::PostSuccess, this, success_callback),
           base::Bind(
               &BluetoothSocketWin::PostErrorCompletion, this, error_callback)));
 }

 void BluetoothSocketWin::Listen(scoped_refptr<BluetoothAdapter> adapter,
                                 const BluetoothUUID& uuid,
                                 const BluetoothAdapter::ServiceOptions& options,
                                 const base::Closure& success_callback,
                                 const ErrorCompletionCallback& error_callback) {
   DCHECK(ui_task_runner()->RunsTasksOnCurrentThread());

   adapter_ = adapter;
   int rfcomm_channel = options.channel ? *options.channel : 0;

   // TODO(xiyuan): Use |options.name|.
   socket_thread()->task_runner()->PostTask(
       FROM_HERE,
       base::Bind(&BluetoothSocketWin::DoListen,
                  this,
                  uuid,
                  rfcomm_channel,
                  success_callback,
                  error_callback));
 }

 void BluetoothSocketWin::ResetData() {
   if (service_reg_data_) {
     if (WSASetService(&service_reg_data_->service,RNRSERVICE_DELETE, 0) ==
         SOCKET_ERROR) {
       LOG(WARNING) << "Failed to unregister service.";
     }
     service_reg_data_.reset();
   }
 }

 void BluetoothSocketWin::Accept(
     const AcceptCompletionCallback& success_callback,
     const ErrorCompletionCallback& error_callback) {
   DCHECK(ui_task_runner()->RunsTasksOnCurrentThread());

   socket_thread()->task_runner()->PostTask(
       FROM_HERE,
       base::Bind(&BluetoothSocketWin::DoAccept,
                  this,
                  success_callback,
                  error_callback));
 }

 void BluetoothSocketWin::DoConnect(
     const base::Closure& success_callback,
     const ErrorCompletionCallback& error_callback) {
   DCHECK(socket_thread()->task_runner()->RunsTasksOnCurrentThread());
   base::ThreadRestrictions::AssertIOAllowed();

   if (tcp_socket()) {
     error_callback.Run(kSocketAlreadyConnected);
     return;
   }

   if (!supports_rfcomm_) {
     // TODO(youngki) add support for L2CAP sockets as well.
     error_callback.Run(kL2CAPNotSupported);
     return;
   }

   std::unique_ptr<net::TCPSocket> scoped_socket(
       new net::TCPSocket(NULL, NULL, net::NetLog::Source()));
   net::EnsureWinsockInit();
   SOCKET socket_fd = socket(AF_BTH, SOCK_STREAM, BTHPROTO_RFCOMM);
   SOCKADDR_BTH sa;
   ZeroMemory(&sa, sizeof(sa));
   sa.addressFamily = AF_BTH;
   sa.port = rfcomm_channel_;
   sa.btAddr = bth_addr_;

   // TODO(rpaquay): Condider making this call non-blocking.
   int status = connect(socket_fd, reinterpret_cast<SOCKADDR*>(&sa), sizeof(sa));
   DWORD error_code = WSAGetLastError();
   if (!(status == 0 || error_code == WSAEINPROGRESS)) {
     LOG(ERROR) << "Failed to connect bluetooth socket "
                << "(" << device_address_ << "): "
                << logging::SystemErrorCodeToString(error_code);
     error_callback.Run("Error connecting to socket: " +
                        logging::SystemErrorCodeToString(error_code));
     closesocket(socket_fd);
     return;
   }

   // Note: We don't have a meaningful |IPEndPoint|, but that is ok since the
   // TCPSocket implementation does not actually require one.
   int net_result =
       scoped_socket->AdoptConnectedSocket(socket_fd, net::IPEndPoint());
   if (net_result != net::OK) {
     error_callback.Run("Error connecting to socket: " +
                        net::ErrorToString(net_result));
     closesocket(socket_fd);
     return;
   }

   SetTCPSocket(std::move(scoped_socket));
   success_callback.Run();
 }

 void BluetoothSocketWin::DoListen(
     const BluetoothUUID& uuid,
     int rfcomm_channel,
     const base::Closure& success_callback,
     const ErrorCompletionCallback& error_callback) {
   DCHECK(socket_thread()->task_runner()->RunsTasksOnCurrentThread());
   DCHECK(!tcp_socket() && !service_reg_data_);

   // The valid range is 0-30. 0 means BT_PORT_ANY and 1-30 are the
   // valid RFCOMM port numbers of SOCKADDR_BTH.
   if (rfcomm_channel < 0 || rfcomm_channel > 30) {
     LOG(WARNING) << "Failed to start service: "
                  << "Invalid RFCCOMM port " << rfcomm_channel
                  << ", uuid=" << uuid.value();
     PostErrorCompletion(error_callback, kInvalidRfcommPort);
     return;
   }

   SOCKET socket_fd = socket(AF_BTH, SOCK_STREAM, BTHPROTO_RFCOMM);
   if (socket_fd == INVALID_SOCKET) {
     LOG(WARNING) << "Failed to start service: create socket, "
                  << "winsock err=" << WSAGetLastError();
     PostErrorCompletion(error_callback, kFailedToCreateSocket);
     return;
   }

   // Note that |socket_fd| belongs to a non-TCP address family (i.e. AF_BTH),
   // TCPSocket methods that involve address could not be called. So bind()
   // is called on |socket_fd| directly.
   std::unique_ptr<net::TCPSocket> scoped_socket(
       new net::TCPSocket(NULL, NULL, net::NetLog::Source()));
   scoped_socket->AdoptListenSocket(socket_fd);

   SOCKADDR_BTH sa;
   struct sockaddr* sock_addr = reinterpret_cast<struct sockaddr*>(&sa);
   int sock_addr_len = sizeof(sa);
   ZeroMemory(&sa, sock_addr_len);
   sa.addressFamily = AF_BTH;
   sa.port = rfcomm_channel ? rfcomm_channel : BT_PORT_ANY;
   if (bind(socket_fd, sock_addr, sock_addr_len) < 0) {
     LOG(WARNING) << "Failed to start service: create socket, "
                  << "winsock err=" << WSAGetLastError();
     PostErrorCompletion(error_callback, kFailedToBindSocket);
     return;
   }

   const int kListenBacklog = 5;
   if (scoped_socket->Listen(kListenBacklog) < 0) {
     LOG(WARNING) << "Failed to start service: Listen"
                  << "winsock err=" << WSAGetLastError();
     PostErrorCompletion(error_callback, kFailedToListenOnSocket);
     return;
   }

   std::unique_ptr<ServiceRegData> reg_data(new ServiceRegData);
   reg_data->name = base::UTF8ToUTF16(uuid.canonical_value());

   if (getsockname(socket_fd, sock_addr, &sock_addr_len)) {
     LOG(WARNING) << "Failed to start service: getsockname, "
                  << "winsock err=" << WSAGetLastError();
     PostErrorCompletion(error_callback, kFailedToGetSockNameForSocket);
     return;
   }
   reg_data->address = sa;

   reg_data->address_info.LocalAddr.iSockaddrLength = sizeof(sa);
   reg_data->address_info.LocalAddr.lpSockaddr =
       reinterpret_cast<struct sockaddr*>(&reg_data->address);
   reg_data->address_info.iSocketType = SOCK_STREAM;
   reg_data->address_info.iProtocol = BTHPROTO_RFCOMM;

   base::string16 cannonical_uuid = L"{" + base::ASCIIToUTF16(
       uuid.canonical_value()) + L"}";
   if (!SUCCEEDED(CLSIDFromString(cannonical_uuid.c_str(), &reg_data->uuid))) {
     LOG(WARNING) << "Failed to start service: "
                  << ", invalid uuid=" << cannonical_uuid;
     PostErrorCompletion(error_callback, kInvalidUUID);
     return;
   }

   reg_data->service.dwSize = sizeof(WSAQUERYSET);
   reg_data->service.lpszServiceInstanceName =
       const_cast<LPWSTR>(reg_data->name.c_str());
   reg_data->service.lpServiceClassId = &reg_data->uuid;
   reg_data->service.dwNameSpace = NS_BTH;
   reg_data->service.dwNumberOfCsAddrs = 1;
   reg_data->service.lpcsaBuffer = &reg_data->address_info;

   if (WSASetService(&reg_data->service,
                     RNRSERVICE_REGISTER, 0) == SOCKET_ERROR) {
     LOG(WARNING) << "Failed to register profile: WSASetService"
                  << "winsock err=" << WSAGetLastError();
     PostErrorCompletion(error_callback, kWsaSetServiceError);
     return;
   }

   SetTCPSocket(std::move(scoped_socket));
   service_reg_data_ = std::move(reg_data);

   PostSuccess(success_callback);
 }

 void BluetoothSocketWin::DoAccept(
     const AcceptCompletionCallback& success_callback,
     const ErrorCompletionCallback& error_callback) {
   DCHECK(socket_thread()->task_runner()->RunsTasksOnCurrentThread());
   int result = tcp_socket()->Accept(
       &accept_socket_,
       &accept_address_,
       base::Bind(&BluetoothSocketWin::OnAcceptOnSocketThread,
                  this,
                  success_callback,
                  error_callback));
   if (result != net::OK && result != net::ERR_IO_PENDING) {
     LOG(WARNING) << "Failed to accept, net err=" << result;
     PostErrorCompletion(error_callback, kFailedToAccept);
   }
 }

 void BluetoothSocketWin::OnAcceptOnSocketThread(
     const AcceptCompletionCallback& success_callback,
     const ErrorCompletionCallback& error_callback,
     int accept_result) {
   DCHECK(socket_thread()->task_runner()->RunsTasksOnCurrentThread());
   if (accept_result != net::OK) {
     LOG(WARNING) << "OnAccept error, net err=" << accept_result;
     PostErrorCompletion(error_callback, kFailedToAccept);
     return;
   }

   ui_task_runner()->PostTask(
     FROM_HERE,
     base::Bind(&BluetoothSocketWin::OnAcceptOnUI,
                this,
                base::Passed(&accept_socket_),
                accept_address_,
                success_callback,
                error_callback));
 }

 void BluetoothSocketWin::OnAcceptOnUI(
     std::unique_ptr<net::TCPSocket> accept_socket,
     const net::IPEndPoint& peer_address,
     const AcceptCompletionCallback& success_callback,
     const ErrorCompletionCallback& error_callback) {
   DCHECK(ui_task_runner()->RunsTasksOnCurrentThread());

   const std::string peer_device_address =
       IPEndPointToBluetoothAddress(peer_address);
   const BluetoothDevice* peer_device = adapter_->GetDevice(peer_device_address);
   if (!peer_device) {
     LOG(WARNING) << "OnAccept failed with unknown device, addr="
                  << peer_device_address;
     error_callback.Run(kFailedToAccept);
     return;
   }

   scoped_refptr<BluetoothSocketWin> peer_socket =
       CreateBluetoothSocket(ui_task_runner(), socket_thread());
   peer_socket->SetTCPSocket(std::move(accept_socket));
   success_callback.Run(peer_device, peer_socket);
 }

 }  // namespace device
	// Copyright (c) 2012 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 "device/bluetooth/bluetooth_socket_win.h"

	#include <objbase.h>

	#include <memory>
	#include <string>
	#include <utility>

	#include "base/logging.h"
	#include "base/memory/ref_counted.h"
	#include "base/sequenced_task_runner.h"
	#include "base/strings/stringprintf.h"
	#include "base/strings/sys_string_conversions.h"
	#include "base/strings/utf_string_conversions.h"
	#include "base/threading/thread_restrictions.h"
	#include "device/bluetooth/bluetooth_device_win.h"
	#include "device/bluetooth/bluetooth_init_win.h"
	#include "device/bluetooth/bluetooth_service_record_win.h"
	#include "device/bluetooth/bluetooth_socket_thread.h"
	#include "net/base/io_buffer.h"
	#include "net/base/ip_endpoint.h"
	#include "net/base/net_errors.h"
	#include "net/base/winsock_init.h"
	#include "net/base/winsock_util.h"

	namespace {

	const char kL2CAPNotSupported[] = "Bluetooth L2CAP protocal is not supported";
	const char kSocketAlreadyConnected[] = "Socket is already connected.";
	const char kInvalidRfcommPort[] = "Invalid RFCCOMM port.";
	const char kFailedToCreateSocket[] = "Failed to create socket.";
	const char kFailedToBindSocket[] = "Failed to bind socket.";
	const char kFailedToListenOnSocket[] = "Failed to listen on socket.";
	const char kFailedToGetSockNameForSocket[] = "Failed to getsockname.";
	const char kFailedToAccept[] = "Failed to accept.";
	const char kInvalidUUID[] = "Invalid UUID";
	const char kWsaSetServiceError[] = "WSASetService error.";

	std::string IPEndPointToBluetoothAddress(const net::IPEndPoint& end_point) {
	if (end_point.address().size() != net::kBluetoothAddressSize)
	return std::string();
	// The address is copied from BTH_ADDR field of SOCKADDR_BTH, which is a
	// 64-bit ULONGLONG that stores Bluetooth address in little-endian. Print in
	// reverse order to preserve the correct ordering.
	return base::StringPrintf(
	"%02X:%02X:%02X:%02X:%02X:%02X", end_point.address().bytes()[5],
	end_point.address().bytes()[4], end_point.address().bytes()[3],
	end_point.address().bytes()[2], end_point.address().bytes()[1],
	end_point.address().bytes()[0]);
	}

	} // namespace

	namespace device {

	struct BluetoothSocketWin::ServiceRegData {
	ServiceRegData() {
	ZeroMemory(&address, sizeof(address));
	ZeroMemory(&address_info, sizeof(address_info));
	ZeroMemory(&uuid, sizeof(uuid));
	ZeroMemory(&service, sizeof(service));
	}

	SOCKADDR_BTH address;
	CSADDR_INFO address_info;
	GUID uuid;
	base::string16 name;
	WSAQUERYSET service;
	};

	// static
	scoped_refptr<BluetoothSocketWin>
	BluetoothSocketWin::CreateBluetoothSocket(
	scoped_refptr<base::SequencedTaskRunner> ui_task_runner,
	scoped_refptr<device::BluetoothSocketThread> socket_thread) {
	DCHECK(ui_task_runner->RunsTasksOnCurrentThread());

	return make_scoped_refptr(
	new BluetoothSocketWin(ui_task_runner, socket_thread));
	}

	BluetoothSocketWin::BluetoothSocketWin(
	scoped_refptr<base::SequencedTaskRunner> ui_task_runner,
	scoped_refptr<BluetoothSocketThread> socket_thread)
	: BluetoothSocketNet(ui_task_runner, socket_thread),
	supports_rfcomm_(false),
	rfcomm_channel_(0xFF),
	bth_addr_(BTH_ADDR_NULL) {
	}

	BluetoothSocketWin::~BluetoothSocketWin() {
	}

	void BluetoothSocketWin::Connect(
	const BluetoothDeviceWin* device,
	const BluetoothUUID& uuid,
	const base::Closure& success_callback,
	const ErrorCompletionCallback& error_callback) {
	DCHECK(ui_task_runner()->RunsTasksOnCurrentThread());
	DCHECK(device);

	if (!uuid.IsValid()) {
	error_callback.Run(kInvalidUUID);
	return;
	}

	const BluetoothServiceRecordWin* service_record_win =
	device->GetServiceRecord(uuid);
	if (!service_record_win) {
	error_callback.Run(kInvalidUUID);
	return;
	}

	device_address_ = service_record_win->device_address();
	if (service_record_win->SupportsRfcomm()) {
	supports_rfcomm_ = true;
	rfcomm_channel_ = service_record_win->rfcomm_channel();
	bth_addr_ = service_record_win->device_bth_addr();
	}

	socket_thread()->task_runner()->PostTask(
	FROM_HERE,
	base::Bind(
	&BluetoothSocketWin::DoConnect,
	this,
	base::Bind(&BluetoothSocketWin::PostSuccess, this, success_callback),
	base::Bind(
	&BluetoothSocketWin::PostErrorCompletion, this, error_callback)));
	}

	void BluetoothSocketWin::Listen(scoped_refptr<BluetoothAdapter> adapter,
	const BluetoothUUID& uuid,
	const BluetoothAdapter::ServiceOptions& options,
	const base::Closure& success_callback,
	const ErrorCompletionCallback& error_callback) {
	DCHECK(ui_task_runner()->RunsTasksOnCurrentThread());

	adapter_ = adapter;
	int rfcomm_channel = options.channel ? *options.channel : 0;

	// TODO(xiyuan): Use \|options.name\|.
	socket_thread()->task_runner()->PostTask(
	FROM_HERE,
	base::Bind(&BluetoothSocketWin::DoListen,
	this,
	uuid,
	rfcomm_channel,
	success_callback,
	error_callback));
	}

	void BluetoothSocketWin::ResetData() {
	if (service_reg_data_) {
	if (WSASetService(&service_reg_data_->service,RNRSERVICE_DELETE, 0) ==
	SOCKET_ERROR) {
	LOG(WARNING) << "Failed to unregister service.";
	}
	service_reg_data_.reset();
	}
	}

	void BluetoothSocketWin::Accept(
	const AcceptCompletionCallback& success_callback,
	const ErrorCompletionCallback& error_callback) {
	DCHECK(ui_task_runner()->RunsTasksOnCurrentThread());

	socket_thread()->task_runner()->PostTask(
	FROM_HERE,
	base::Bind(&BluetoothSocketWin::DoAccept,
	this,
	success_callback,
	error_callback));
	}

	void BluetoothSocketWin::DoConnect(
	const base::Closure& success_callback,
	const ErrorCompletionCallback& error_callback) {
	DCHECK(socket_thread()->task_runner()->RunsTasksOnCurrentThread());
	base::ThreadRestrictions::AssertIOAllowed();

	if (tcp_socket()) {
	error_callback.Run(kSocketAlreadyConnected);
	return;
	}

	if (!supports_rfcomm_) {
	// TODO(youngki) add support for L2CAP sockets as well.
	error_callback.Run(kL2CAPNotSupported);
	return;
	}

	std::unique_ptr<net::TCPSocket> scoped_socket(
	new net::TCPSocket(NULL, NULL, net::NetLog::Source()));
	net::EnsureWinsockInit();
	SOCKET socket_fd = socket(AF_BTH, SOCK_STREAM, BTHPROTO_RFCOMM);
	SOCKADDR_BTH sa;
	ZeroMemory(&sa, sizeof(sa));
	sa.addressFamily = AF_BTH;
	sa.port = rfcomm_channel_;
	sa.btAddr = bth_addr_;

	// TODO(rpaquay): Condider making this call non-blocking.
	int status = connect(socket_fd, reinterpret_cast<SOCKADDR*>(&sa), sizeof(sa));
	DWORD error_code = WSAGetLastError();
	if (!(status == 0 \|\| error_code == WSAEINPROGRESS)) {
	LOG(ERROR) << "Failed to connect bluetooth socket "
	<< "(" << device_address_ << "): "
	<< logging::SystemErrorCodeToString(error_code);
	error_callback.Run("Error connecting to socket: " +
	logging::SystemErrorCodeToString(error_code));
	closesocket(socket_fd);
	return;
	}

	// Note: We don't have a meaningful \|IPEndPoint\|, but that is ok since the
	// TCPSocket implementation does not actually require one.
	int net_result =
	scoped_socket->AdoptConnectedSocket(socket_fd, net::IPEndPoint());
	if (net_result != net::OK) {
	error_callback.Run("Error connecting to socket: " +
	net::ErrorToString(net_result));
	closesocket(socket_fd);
	return;
	}

	SetTCPSocket(std::move(scoped_socket));
	success_callback.Run();
	}

	void BluetoothSocketWin::DoListen(
	const BluetoothUUID& uuid,
	int rfcomm_channel,
	const base::Closure& success_callback,
	const ErrorCompletionCallback& error_callback) {
	DCHECK(socket_thread()->task_runner()->RunsTasksOnCurrentThread());
	DCHECK(!tcp_socket() && !service_reg_data_);

	// The valid range is 0-30. 0 means BT_PORT_ANY and 1-30 are the
	// valid RFCOMM port numbers of SOCKADDR_BTH.
	if (rfcomm_channel < 0 \|\| rfcomm_channel > 30) {
	LOG(WARNING) << "Failed to start service: "
	<< "Invalid RFCCOMM port " << rfcomm_channel
	<< ", uuid=" << uuid.value();
	PostErrorCompletion(error_callback, kInvalidRfcommPort);
	return;
	}

	SOCKET socket_fd = socket(AF_BTH, SOCK_STREAM, BTHPROTO_RFCOMM);
	if (socket_fd == INVALID_SOCKET) {
	LOG(WARNING) << "Failed to start service: create socket, "
	<< "winsock err=" << WSAGetLastError();
	PostErrorCompletion(error_callback, kFailedToCreateSocket);
	return;
	}

	// Note that \|socket_fd\| belongs to a non-TCP address family (i.e. AF_BTH),
	// TCPSocket methods that involve address could not be called. So bind()
	// is called on \|socket_fd\| directly.
	std::unique_ptr<net::TCPSocket> scoped_socket(
	new net::TCPSocket(NULL, NULL, net::NetLog::Source()));
	scoped_socket->AdoptListenSocket(socket_fd);

	SOCKADDR_BTH sa;
	struct sockaddr* sock_addr = reinterpret_cast<struct sockaddr*>(&sa);
	int sock_addr_len = sizeof(sa);
	ZeroMemory(&sa, sock_addr_len);
	sa.addressFamily = AF_BTH;
	sa.port = rfcomm_channel ? rfcomm_channel : BT_PORT_ANY;
	if (bind(socket_fd, sock_addr, sock_addr_len) < 0) {
	LOG(WARNING) << "Failed to start service: create socket, "
	<< "winsock err=" << WSAGetLastError();
	PostErrorCompletion(error_callback, kFailedToBindSocket);
	return;
	}

	const int kListenBacklog = 5;
	if (scoped_socket->Listen(kListenBacklog) < 0) {
	LOG(WARNING) << "Failed to start service: Listen"
	<< "winsock err=" << WSAGetLastError();
	PostErrorCompletion(error_callback, kFailedToListenOnSocket);
	return;
	}

	std::unique_ptr<ServiceRegData> reg_data(new ServiceRegData);
	reg_data->name = base::UTF8ToUTF16(uuid.canonical_value());

	if (getsockname(socket_fd, sock_addr, &sock_addr_len)) {
	LOG(WARNING) << "Failed to start service: getsockname, "
	<< "winsock err=" << WSAGetLastError();
	PostErrorCompletion(error_callback, kFailedToGetSockNameForSocket);
	return;
	}
	reg_data->address = sa;

	reg_data->address_info.LocalAddr.iSockaddrLength = sizeof(sa);
	reg_data->address_info.LocalAddr.lpSockaddr =
	reinterpret_cast<struct sockaddr*>(&reg_data->address);
	reg_data->address_info.iSocketType = SOCK_STREAM;
	reg_data->address_info.iProtocol = BTHPROTO_RFCOMM;

	base::string16 cannonical_uuid = L"{" + base::ASCIIToUTF16(
	uuid.canonical_value()) + L"}";
	if (!SUCCEEDED(CLSIDFromString(cannonical_uuid.c_str(), &reg_data->uuid))) {
	LOG(WARNING) << "Failed to start service: "
	<< ", invalid uuid=" << cannonical_uuid;
	PostErrorCompletion(error_callback, kInvalidUUID);
	return;
	}

	reg_data->service.dwSize = sizeof(WSAQUERYSET);
	reg_data->service.lpszServiceInstanceName =
	const_cast<LPWSTR>(reg_data->name.c_str());
	reg_data->service.lpServiceClassId = &reg_data->uuid;
	reg_data->service.dwNameSpace = NS_BTH;
	reg_data->service.dwNumberOfCsAddrs = 1;
	reg_data->service.lpcsaBuffer = &reg_data->address_info;

	if (WSASetService(&reg_data->service,
	RNRSERVICE_REGISTER, 0) == SOCKET_ERROR) {
	LOG(WARNING) << "Failed to register profile: WSASetService"
	<< "winsock err=" << WSAGetLastError();
	PostErrorCompletion(error_callback, kWsaSetServiceError);
	return;
	}

	SetTCPSocket(std::move(scoped_socket));
	service_reg_data_ = std::move(reg_data);

	PostSuccess(success_callback);
	}

	void BluetoothSocketWin::DoAccept(
	const AcceptCompletionCallback& success_callback,
	const ErrorCompletionCallback& error_callback) {
	DCHECK(socket_thread()->task_runner()->RunsTasksOnCurrentThread());
	int result = tcp_socket()->Accept(
	&accept_socket_,
	&accept_address_,
	base::Bind(&BluetoothSocketWin::OnAcceptOnSocketThread,
	this,
	success_callback,
	error_callback));
	if (result != net::OK && result != net::ERR_IO_PENDING) {
	LOG(WARNING) << "Failed to accept, net err=" << result;
	PostErrorCompletion(error_callback, kFailedToAccept);
	}
	}

	void BluetoothSocketWin::OnAcceptOnSocketThread(
	const AcceptCompletionCallback& success_callback,
	const ErrorCompletionCallback& error_callback,
	int accept_result) {
	DCHECK(socket_thread()->task_runner()->RunsTasksOnCurrentThread());
	if (accept_result != net::OK) {
	LOG(WARNING) << "OnAccept error, net err=" << accept_result;
	PostErrorCompletion(error_callback, kFailedToAccept);
	return;
	}

	ui_task_runner()->PostTask(
	FROM_HERE,
	base::Bind(&BluetoothSocketWin::OnAcceptOnUI,
	this,
	base::Passed(&accept_socket_),
	accept_address_,
	success_callback,
	error_callback));
	}

	void BluetoothSocketWin::OnAcceptOnUI(
	std::unique_ptr<net::TCPSocket> accept_socket,
	const net::IPEndPoint& peer_address,
	const AcceptCompletionCallback& success_callback,
	const ErrorCompletionCallback& error_callback) {
	DCHECK(ui_task_runner()->RunsTasksOnCurrentThread());

	const std::string peer_device_address =
	IPEndPointToBluetoothAddress(peer_address);
	const BluetoothDevice* peer_device = adapter_->GetDevice(peer_device_address);
	if (!peer_device) {
	LOG(WARNING) << "OnAccept failed with unknown device, addr="
	<< peer_device_address;
	error_callback.Run(kFailedToAccept);
	return;
	}

	scoped_refptr<BluetoothSocketWin> peer_socket =
	CreateBluetoothSocket(ui_task_runner(), socket_thread());
	peer_socket->SetTCPSocket(std::move(accept_socket));
	success_callback.Run(peer_device, peer_socket);
	}

	} // namespace device