src/device/bluetooth/bluetooth_socket_win.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "device/bluetooth/bluetooth_socket_win.h"
   6
   7 #include <string>
   8
   9 #include "base/logging.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "base/strings/sys_string_conversions.h"
  12 #include "device/bluetooth/bluetooth_init_win.h"
  13 #include "device/bluetooth/bluetooth_service_record_win.h"
  14 #include "net/base/io_buffer.h"
  15 #include "net/base/winsock_init.h"
  16
  17 namespace {
  18
  19 std::string FormatErrorMessage(DWORD error_code) {
  20   TCHAR error_msg[1024];
  21   FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
  22                 0,
  23                 error_code,
  24                 0,
  25                 error_msg,
  26                 1024,
  27                 NULL);
  28   return base::SysWideToUTF8(error_msg);
  29 }
  30
  31 }  // namespace
  32
  33 namespace device {
  34
  35 BluetoothSocketWin::BluetoothSocketWin(SOCKET fd) : fd_(fd) {
  36 }
  37
  38 BluetoothSocketWin::~BluetoothSocketWin() {
  39   closesocket(fd_);
  40 }
  41
  42 // static
  43 scoped_refptr<BluetoothSocket> BluetoothSocketWin::CreateBluetoothSocket(
  44     const BluetoothServiceRecord& service_record) {
  45   BluetoothSocketWin* bluetooth_socket = NULL;
  46   if (service_record.SupportsRfcomm()) {
  47     net::EnsureWinsockInit();
  48     SOCKET socket_fd = socket(AF_BTH, SOCK_STREAM, BTHPROTO_RFCOMM);
  49     SOCKADDR_BTH sa;
  50     ZeroMemory(&sa, sizeof(sa));
  51     sa.addressFamily = AF_BTH;
  52     sa.port = service_record.rfcomm_channel();
  53     const BluetoothServiceRecordWin* service_record_win =
  54         static_cast<const BluetoothServiceRecordWin*>(&service_record);
  55     sa.btAddr = service_record_win->bth_addr();
  56
  57     int status = connect(socket_fd,
  58                          reinterpret_cast<SOCKADDR *>(&sa),
  59                          sizeof(sa));
  60     DWORD error_code = WSAGetLastError();
  61     if (status == 0 || error_code == WSAEINPROGRESS) {
  62       bluetooth_socket =
  63           new BluetoothSocketWin(socket_fd);
  64     } else {
  65       LOG(ERROR) << "Failed to connect bluetooth socket "
  66           << "(" << service_record.address() << "): "
  67           << "(" << error_code << ")" << FormatErrorMessage(error_code);
  68       closesocket(socket_fd);
  69     }
  70   }
  71   // TODO(youngki) add support for L2CAP sockets as well.
  72
  73   return scoped_refptr<BluetoothSocketWin>(bluetooth_socket);
  74 }
  75
  76 bool BluetoothSocketWin::Receive(net::GrowableIOBuffer* buffer) {
  77   buffer->SetCapacity(1024);
  78   int bytes_read;
  79   do {
  80     if (buffer->RemainingCapacity() == 0)
  81       buffer->SetCapacity(buffer->capacity() * 2);
  82     bytes_read = recv(fd_, buffer->data(), buffer->RemainingCapacity(), 0);
  83     if (bytes_read > 0)
  84       buffer->set_offset(buffer->offset() + bytes_read);
  85   } while (bytes_read > 0);
  86
  87   DWORD error_code = WSAGetLastError();
  88   if (bytes_read < 0 && error_code != WSAEWOULDBLOCK) {
  89     error_message_ = FormatErrorMessage(error_code);
  90     return false;
  91   }
  92   return true;
  93 }
  94
  95 bool BluetoothSocketWin::Send(net::DrainableIOBuffer* buffer) {
  96   int bytes_written;
  97   do {
  98     bytes_written = send(fd_, buffer->data(), buffer->BytesRemaining(), 0);
  99     if (bytes_written > 0)
 100       buffer->DidConsume(bytes_written);
 101   } while (buffer->BytesRemaining() > 0 && bytes_written > 0);
 102
 103   DWORD error_code = WSAGetLastError();
 104   if (bytes_written < 0 && error_code != WSAEWOULDBLOCK) {
 105     error_message_ = FormatErrorMessage(error_code);
 106     return false;
 107   }
 108   return true;
 109 }
 110
 111 std::string BluetoothSocketWin::GetLastErrorMessage() const {
 112   return error_message_;
 113 }
 114
 115 }  // namespace device