| // 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 "device/bluetooth/bluetooth_uuid.h" |
| |
| #include "base/basictypes.h" |
| #include "base/logging.h" |
| #include "base/strings/string_util.h" |
| #include "ipc/ipc_message.h" |
| |
| namespace device { |
| |
| namespace { |
| |
| const char* kCommonUuidPostfix = "-0000-1000-8000-00805f9b34fb"; |
| const char* kCommonUuidPrefix = "0000"; |
| |
| // Returns the canonical, 128-bit canonical, and the format of the UUID |
| // in |canonical|, |canonical_128|, and |format| based on |uuid|. |
| void GetCanonicalUuid(std::string uuid, |
| std::string* canonical, |
| std::string* canonical_128, |
| BluetoothUUID::Format* format) { |
| // Initialize the values for the failure case. |
| canonical->clear(); |
| canonical_128->clear(); |
| *format = BluetoothUUID::kFormatInvalid; |
| |
| if (uuid.empty()) |
| return; |
| |
| if (uuid.size() < 11 && uuid.find("0x") == 0) |
| uuid = uuid.substr(2); |
| |
| if (!(uuid.size() == 4 || uuid.size() == 8 || uuid.size() == 36)) |
| return; |
| |
| for (size_t i = 0; i < uuid.size(); ++i) { |
| if (i == 8 || i == 13 || i == 18 || i == 23) { |
| if (uuid[i] != '-') |
| return; |
| } else { |
| if (!base::IsHexDigit(uuid[i])) |
| return; |
| uuid[i] = base::ToLowerASCII(uuid[i]); |
| } |
| } |
| |
| canonical->assign(uuid); |
| if (uuid.size() == 4) { |
| canonical_128->assign(kCommonUuidPrefix + uuid + kCommonUuidPostfix); |
| *format = BluetoothUUID::kFormat16Bit; |
| } else if (uuid.size() == 8) { |
| canonical_128->assign(uuid + kCommonUuidPostfix); |
| *format = BluetoothUUID::kFormat32Bit; |
| } else { |
| canonical_128->assign(uuid); |
| *format = BluetoothUUID::kFormat128Bit; |
| } |
| } |
| |
| } // namespace |
| |
| |
| BluetoothUUID::BluetoothUUID(const std::string& uuid) { |
| GetCanonicalUuid(uuid, &value_, &canonical_value_, &format_); |
| } |
| |
| BluetoothUUID::BluetoothUUID() : format_(kFormatInvalid) { |
| } |
| |
| BluetoothUUID::~BluetoothUUID() { |
| } |
| |
| bool BluetoothUUID::IsValid() const { |
| return format_ != kFormatInvalid; |
| } |
| |
| bool BluetoothUUID::operator<(const BluetoothUUID& uuid) const { |
| return canonical_value_ < uuid.canonical_value_; |
| } |
| |
| bool BluetoothUUID::operator==(const BluetoothUUID& uuid) const { |
| return canonical_value_ == uuid.canonical_value_; |
| } |
| |
| bool BluetoothUUID::operator!=(const BluetoothUUID& uuid) const { |
| return canonical_value_ != uuid.canonical_value_; |
| } |
| |
| void PrintTo(const BluetoothUUID& uuid, std::ostream* out) { |
| *out << uuid.canonical_value(); |
| } |
| |
| } // namespace device |
| |
| void IPC::ParamTraits<device::BluetoothUUID>::Write(Message* m, |
| const param_type& p) { |
| m->WriteString(p.canonical_value()); |
| } |
| |
| bool IPC::ParamTraits<device::BluetoothUUID>::Read(const Message* m, |
| base::PickleIterator* iter, |
| param_type* r) { |
| std::string value; |
| if (!iter->ReadString(&value)) |
| return false; |
| *r = device::BluetoothUUID(value); |
| // If the format isn't 128-bit, .value() would return a different answer than |
| // .canonical_value(). Then if browser-side code accidentally checks .value() |
| // against a 128-bit string literal, a hostile renderer could use the 16- or |
| // 32-bit format and evade the check. |
| return r->format() == device::BluetoothUUID::kFormat128Bit; |
| } |
| |
| void IPC::ParamTraits<device::BluetoothUUID>::Log(const param_type& p, |
| std::string* l) { |
| l->append(p.canonical_value()); |
| } |