| // Copyright 2017 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef VM_TOOLS_LAUNCHER_MAC_ADDRESS_H_ |
| #define VM_TOOLS_LAUNCHER_MAC_ADDRESS_H_ |
| |
| #include <stdint.h> |
| |
| #include <array> |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include <base/files/file_path.h> |
| #include <base/macros.h> |
| |
| #include "vm_tools/launcher/pooled_resource.h" |
| |
| namespace vm_tools { |
| namespace launcher { |
| |
| // Generates locally managed EUI-48 MAC addresses and ensures no collisions. |
| class MacAddress : public PooledResource { |
| public: |
| using Octets = std::array<uint8_t, 6>; |
| |
| ~MacAddress() override; |
| |
| std::string ToString() const; |
| |
| static std::unique_ptr<MacAddress> Create( |
| const base::FilePath& instance_runtime_dir); |
| static std::unique_ptr<MacAddress> Load( |
| const base::FilePath& instance_runtime_dir); |
| |
| protected: |
| // PooledResource overrides |
| const char* GetName() const override; |
| const std::string GetResourceID() const override; |
| bool LoadGlobalResources(const std::string& resources) override; |
| std::string PersistGlobalResources() override; |
| bool LoadInstanceResource(const std::string& resource) override; |
| bool AllocateResource() override; |
| bool ReleaseResource() override; |
| |
| private: |
| MacAddress(const base::FilePath& instance_runtime_dir, |
| bool release_on_destruction); |
| |
| bool IsValidMac(const Octets& candidate) const; |
| bool IsMacAllocated(const Octets& candidate) const; |
| |
| std::vector<Octets> allocated_macs_; |
| Octets selected_mac_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MacAddress); |
| }; |
| } // namespace launcher |
| } // namespace vm_tools |
| |
| #endif // VM_TOOLS_LAUNCHER_MAC_ADDRESS_H_ |