src/chrome/browser/extensions/api/music_manager_private/device_id_mac.cc

   1 // Copyright 2013 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 "chrome/browser/extensions/api/music_manager_private/device_id.h"
   6
   7 #include <CoreFoundation/CoreFoundation.h>
   8 #include <DiskArbitration/DASession.h>
   9 #include <DiskArbitration/DADisk.h>
  10 #include <IOKit/IOKitLib.h>
  11 #include <IOKit/network/IOEthernetController.h>
  12 #include <IOKit/network/IOEthernetInterface.h>
  13 #include <IOKit/network/IONetworkInterface.h>
  14 #include <sys/mount.h>
  15
  16 #include "base/bind.h"
  17 #include "base/mac/foundation_util.h"
  18 #include "base/mac/scoped_cftyperef.h"
  19 #include "base/mac/scoped_ioobject.h"
  20 #include "base/strings/string_number_conversions.h"
  21 #include "base/strings/string_util.h"
  22 #include "base/strings/sys_string_conversions.h"
  23 #include "base/threading/thread_restrictions.h"
  24 #include "content/public/browser/browser_thread.h"
  25
  26 namespace {
  27
  28 using extensions::api::DeviceId;
  29
  30 const char kRootDirectory[] = "/";
  31
  32 typedef base::Callback<bool(const void* bytes, size_t size)>
  33     IsValidMacAddressCallback;
  34
  35 // Return the BSD name (e.g. '/dev/disk1') of the root directory by enumerating
  36 // through the mounted volumes .
  37 // Return "" if an error occured.
  38 std::string FindBSDNameOfSystemDisk() {
  39   struct statfs* mounted_volumes;
  40   int num_volumes = getmntinfo(&mounted_volumes, 0);
  41   if (num_volumes == 0) {
  42     VLOG(1) << "Cannot enumerate list of mounted volumes.";
  43     return std::string();
  44   }
  45
  46   for (int i = 0; i < num_volumes; i++) {
  47     struct statfs* vol = &mounted_volumes[i];
  48     if (std::string(vol->f_mntonname) == kRootDirectory) {
  49       return std::string(vol->f_mntfromname);
  50     }
  51   }
  52
  53   VLOG(1) << "Cannot find disk mounted as '" << kRootDirectory << "'.";
  54   return std::string();
  55 }
  56
  57 // Return the Volume UUID property of a BSD disk name (e.g. '/dev/disk1').
  58 // Return "" if an error occured.
  59 std::string GetVolumeUUIDFromBSDName(const std::string& bsd_name) {
  60   const CFAllocatorRef allocator = NULL;
  61
  62   base::ScopedCFTypeRef<DASessionRef> session(DASessionCreate(allocator));
  63   if (session.get() == NULL) {
  64     VLOG(1) << "Error creating DA Session.";
  65     return std::string();
  66   }
  67
  68   base::ScopedCFTypeRef<DADiskRef> disk(
  69       DADiskCreateFromBSDName(allocator, session, bsd_name.c_str()));
  70   if (disk.get() == NULL) {
  71     VLOG(1) << "Error creating DA disk from BSD disk name.";
  72     return std::string();
  73   }
  74
  75   base::ScopedCFTypeRef<CFDictionaryRef> disk_description(
  76       DADiskCopyDescription(disk));
  77   if (disk_description.get() == NULL) {
  78     VLOG(1) << "Error getting disk description.";
  79     return std::string();
  80   }
  81
  82   CFUUIDRef volume_uuid = base::mac::GetValueFromDictionary<CFUUIDRef>(
  83       disk_description,
  84       kDADiskDescriptionVolumeUUIDKey);
  85   if (volume_uuid == NULL) {
  86     VLOG(1) << "Error getting volume UUID of disk.";
  87     return std::string();
  88   }
  89
  90   base::ScopedCFTypeRef<CFStringRef> volume_uuid_string(
  91       CFUUIDCreateString(allocator, volume_uuid));
  92   if (volume_uuid_string.get() == NULL) {
  93     VLOG(1) << "Error creating string from CSStringRef.";
  94     return std::string();
  95   }
  96
  97   return base::SysCFStringRefToUTF8(volume_uuid_string.get());
  98 }
  99
 100 // Return Volume UUID property of disk mounted as "/".
 101 std::string GetVolumeUUID() {
 102   base::ThreadRestrictions::AssertIOAllowed();
 103
 104   std::string result;
 105   std::string bsd_name = FindBSDNameOfSystemDisk();
 106   if (!bsd_name.empty()) {
 107     VLOG(4) << "BSD name of root directory: '" << bsd_name << "'";
 108     result = GetVolumeUUIDFromBSDName(bsd_name);
 109   }
 110   return result;
 111 }
 112
 113 class MacAddressProcessor {
 114  public:
 115   MacAddressProcessor(const IsValidMacAddressCallback& is_valid_mac_address)
 116     : is_valid_mac_address_(is_valid_mac_address) {
 117   }
 118
 119   bool ProcessNetworkController(io_object_t network_controller) {
 120     // Use the MAC address of the first network interface.
 121     bool keep_going = true;
 122     base::ScopedCFTypeRef<CFDataRef> mac_address_data(
 123         static_cast<CFDataRef>(
 124             IORegistryEntryCreateCFProperty(network_controller,
 125                                             CFSTR(kIOMACAddress),
 126                                             kCFAllocatorDefault,
 127                                             0)));
 128     if (!mac_address_data)
 129       return keep_going;
 130
 131     const UInt8* mac_address = CFDataGetBytePtr(mac_address_data);
 132     size_t mac_address_size = CFDataGetLength(mac_address_data);
 133     if (!is_valid_mac_address_.Run(mac_address, mac_address_size))
 134       return keep_going;
 135
 136     std::string mac_address_string = base::StringToLowerASCII(base::HexEncode(
 137         mac_address, mac_address_size));
 138
 139     base::ScopedCFTypeRef<CFStringRef> provider_class(
 140         static_cast<CFStringRef>(
 141             IORegistryEntryCreateCFProperty(network_controller,
 142                                             CFSTR(kIOProviderClassKey),
 143                                             kCFAllocatorDefault,
 144                                             0)));
 145     if (provider_class) {
 146       if (CFStringCompare(provider_class, CFSTR("IOPCIDevice"), 0) ==
 147               kCFCompareEqualTo) {
 148         // MAC address from built-in network card is always best choice.
 149         found_mac_address_ = mac_address_string;
 150         keep_going = false;
 151         return keep_going;
 152       }
 153     }
 154
 155     // Fall back to using non built-in card MAC address, but keep looking.
 156     found_mac_address_ = mac_address_string;
 157     return keep_going;
 158   }
 159
 160   std::string mac_address() const { return found_mac_address_; }
 161
 162  private:
 163   const IsValidMacAddressCallback& is_valid_mac_address_;
 164   std::string found_mac_address_;
 165 };
 166
 167 std::string GetMacAddress(
 168     const IsValidMacAddressCallback& is_valid_mac_address) {
 169   base::ThreadRestrictions::AssertIOAllowed();
 170
 171   mach_port_t master_port;
 172   kern_return_t kr = IOMasterPort(MACH_PORT_NULL, &master_port);
 173   if (kr != KERN_SUCCESS) {
 174     LOG(ERROR) << "IOMasterPort failed: " << kr;
 175     return "";
 176   }
 177
 178   CFMutableDictionaryRef match_classes =
 179       IOServiceMatching(kIOEthernetInterfaceClass);
 180   if (!match_classes) {
 181     LOG(ERROR) << "IOServiceMatching returned a NULL dictionary";
 182     return "";
 183   }
 184
 185   io_iterator_t iterator_ref;
 186   kr = IOServiceGetMatchingServices(master_port,
 187                                     match_classes,
 188                                     &iterator_ref);
 189   if (kr != KERN_SUCCESS) {
 190     LOG(ERROR) << "IOServiceGetMatchingServices failed: " << kr;
 191     return "";
 192   }
 193   base::mac::ScopedIOObject<io_iterator_t> iterator(iterator_ref);
 194
 195   MacAddressProcessor processor(is_valid_mac_address);
 196   while (true) {
 197     // Note: interface_service should not be released.
 198     io_object_t interface_service = IOIteratorNext(iterator);
 199     if (!interface_service)
 200       break;
 201
 202     io_object_t controller_service_ref;
 203     kr = IORegistryEntryGetParentEntry(interface_service,
 204                                        kIOServicePlane,
 205                                        &controller_service_ref);
 206     if (kr != KERN_SUCCESS) {
 207       LOG(ERROR) << "IORegistryEntryGetParentEntry failed: " << kr;
 208     } else {
 209       base::mac::ScopedIOObject<io_object_t> controller_service(
 210           controller_service_ref);
 211       bool keep_going = processor.ProcessNetworkController(controller_service);
 212       if (!keep_going) {
 213         break;
 214       }
 215     }
 216   }
 217   return processor.mac_address();
 218 }
 219
 220 void GetRawDeviceIdImpl(const IsValidMacAddressCallback& is_valid_mac_address,
 221                         const DeviceId::IdCallback& callback) {
 222   base::ThreadRestrictions::AssertIOAllowed();
 223
 224   std::string raw_device_id;
 225   std::string mac_address = GetMacAddress(is_valid_mac_address);
 226   std::string disk_id = GetVolumeUUID();
 227   if (!mac_address.empty() && !disk_id.empty()) {
 228     raw_device_id = mac_address + disk_id;
 229   }
 230   content::BrowserThread::PostTask(
 231       content::BrowserThread::UI,
 232       FROM_HERE,
 233       base::Bind(callback, raw_device_id));
 234 }
 235
 236 }  // namespace
 237
 238 namespace extensions {
 239 namespace api {
 240
 241 // static
 242 void DeviceId::GetRawDeviceId(const IdCallback& callback) {
 243   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 244
 245   content::BrowserThread::PostTask(
 246       content::BrowserThread::FILE,
 247       FROM_HERE,
 248       base::Bind(GetRawDeviceIdImpl,
 249           base::Bind(DeviceId::IsValidMacAddress),
 250           callback));
 251 }
 252
 253 }  // namespace api
 254 }  // namespace extensions