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.
5 #include "chrome/browser/extensions/api/music_manager_private/device_id.h"
7 #include <sys/socket.h> // Must be included before ifaddrs.h.
10 #include <sys/ioctl.h>
14 #include "base/bind.h"
15 #include "base/file_util.h"
16 #include "base/files/file_enumerator.h"
17 #include "base/files/file_path.h"
18 #include "base/strings/string_number_conversions.h"
19 #include "base/strings/string_util.h"
20 #include "base/threading/thread_restrictions.h"
21 #include "content/public/browser/browser_thread.h"
25 using extensions::api::DeviceId;
27 typedef base::Callback<bool(const void* bytes, size_t size)>
28 IsValidMacAddressCallback;
30 const char kDiskByUuidDirectoryName[] = "/dev/disk/by-uuid";
31 const char* kDeviceNames[] = {
32 "sda1", "hda1", "dm-0", "xvda1", "sda2", "hda2", "dm-1", "xvda2",
34 // Fedora 15 uses biosdevname feature where Embedded ethernet uses the
35 // "em" prefix and PCI cards use the p[0-9]c[0-9] format based on PCI
36 // slot and card information.
37 const char* kNetDeviceNamePrefixes[] = {
38 "eth", "em", "en", "wl", "ww", "p0", "p1", "p2", "p3", "p4", "p5", "p6",
39 "p7", "p8", "p9", "wlan"
42 // Map from device name to disk uuid
43 typedef std::map<base::FilePath, base::FilePath> DiskEntries;
45 std::string GetDiskUuid() {
46 base::ThreadRestrictions::AssertIOAllowed();
48 DiskEntries disk_uuids;
49 base::FileEnumerator files(base::FilePath(kDiskByUuidDirectoryName),
51 base::FileEnumerator::FILES);
53 base::FilePath file_path = files.Next();
54 if (file_path.empty())
57 base::FilePath target_path;
58 if (!base::ReadSymbolicLink(file_path, &target_path))
61 base::FilePath device_name = target_path.BaseName();
62 base::FilePath disk_uuid = file_path.BaseName();
63 disk_uuids[device_name] = disk_uuid;
66 // Look for first device name matching an entry of |kDeviceNames|.
68 for (size_t i = 0; i < arraysize(kDeviceNames); i++) {
69 DiskEntries::iterator it =
70 disk_uuids.find(base::FilePath(kDeviceNames[i]));
71 if (it != disk_uuids.end()) {
72 DVLOG(1) << "Returning uuid: \"" << it->second.value()
73 << "\" for device \"" << it->first.value() << "\"";
74 result = it->second.value();
79 // Log failure (at most once) for diagnostic purposes.
80 static bool error_logged = false;
81 if (result.empty() && !error_logged) {
83 LOG(ERROR) << "Could not find appropriate disk uuid.";
84 for (DiskEntries::iterator it = disk_uuids.begin();
85 it != disk_uuids.end(); ++it) {
86 LOG(ERROR) << " DeviceID=" << it->first.value() << ", uuid="
87 << it->second.value();
94 class MacAddressProcessor {
96 explicit MacAddressProcessor(
97 const IsValidMacAddressCallback& is_valid_mac_address)
98 : is_valid_mac_address_(is_valid_mac_address) {
101 bool ProcessInterface(struct ifaddrs *ifaddr,
102 const char* prefixes[],
103 size_t prefixes_count) {
104 const int MAC_LENGTH = 6;
107 memset(&ifinfo, 0, sizeof(ifinfo));
108 strncpy(ifinfo.ifr_name, ifaddr->ifa_name, sizeof(ifinfo.ifr_name) - 1);
110 int sd = socket(AF_INET, SOCK_DGRAM, 0);
111 int result = ioctl(sd, SIOCGIFHWADDR, &ifinfo);
117 const char* mac_address =
118 static_cast<const char*>(ifinfo.ifr_hwaddr.sa_data);
119 if (!is_valid_mac_address_.Run(mac_address, MAC_LENGTH))
122 if (!IsValidPrefix(ifinfo.ifr_name, prefixes, prefixes_count))
127 StringToLowerASCII(base::HexEncode(mac_address, MAC_LENGTH));
131 std::string mac_address() const { return found_mac_address_; }
134 bool IsValidPrefix(const char* name,
135 const char* prefixes[],
136 size_t prefixes_count) {
137 for (size_t i = 0; i < prefixes_count; i++) {
138 if (strncmp(prefixes[i], name, strlen(prefixes[i])) == 0)
144 const IsValidMacAddressCallback& is_valid_mac_address_;
145 std::string found_mac_address_;
148 std::string GetMacAddress(
149 const IsValidMacAddressCallback& is_valid_mac_address) {
150 base::ThreadRestrictions::AssertIOAllowed();
152 struct ifaddrs* ifaddrs;
153 int rv = getifaddrs(&ifaddrs);
155 PLOG(ERROR) << "getifaddrs failed " << rv;
159 MacAddressProcessor processor(is_valid_mac_address);
160 for (struct ifaddrs* ifa = ifaddrs; ifa; ifa = ifa->ifa_next) {
161 bool keep_going = processor.ProcessInterface(
162 ifa, kNetDeviceNamePrefixes, arraysize(kNetDeviceNamePrefixes));
166 freeifaddrs(ifaddrs);
167 return processor.mac_address();
170 void GetRawDeviceIdImpl(const IsValidMacAddressCallback& is_valid_mac_address,
171 const DeviceId::IdCallback& callback) {
172 base::ThreadRestrictions::AssertIOAllowed();
174 std::string disk_id = GetDiskUuid();
175 std::string mac_address = GetMacAddress(is_valid_mac_address);
177 std::string raw_device_id;
178 if (!mac_address.empty() && !disk_id.empty()) {
179 raw_device_id = mac_address + disk_id;
182 content::BrowserThread::PostTask(
183 content::BrowserThread::UI,
185 base::Bind(callback, raw_device_id));
190 namespace extensions {
194 void DeviceId::GetRawDeviceId(const IdCallback& callback) {
195 DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
197 content::BrowserThread::PostTask(
198 content::BrowserThread::FILE,
200 base::Bind(GetRawDeviceIdImpl,
201 base::Bind(DeviceId::IsValidMacAddress),
206 } // namespace extensions