| // Copyright 2020 The Fuchsia 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 SRC_CONNECTIVITY_NETWORK_TUN_NETWORK_TUN_MAC_ADAPTER_H_ |
| #define SRC_CONNECTIVITY_NETWORK_TUN_NETWORK_TUN_MAC_ADAPTER_H_ |
| |
| #include <fuchsia/net/cpp/fidl.h> |
| #include <fuchsia/net/tun/cpp/fidl.h> |
| #include <lib/fidl-async/cpp/bind.h> |
| |
| #include <fbl/mutex.h> |
| |
| #include "src/connectivity/network/drivers/network-device/mac/public/network_mac.h" |
| |
| namespace network { |
| namespace tun { |
| |
| class MacAdapter; |
| |
| // An abstract MacAdapter parent. |
| // |
| // This abstract class allows the owner of a `MacAdapter` to be notified of important events. |
| class MacAdapterParent { |
| public: |
| // Called when there are changes to the internal state of the `adapter`. |
| virtual void OnMacStateChanged(MacAdapter* adapter) = 0; |
| }; |
| |
| // An entity that instantiates a MacAddrDeviceInterface and provides an implementations of |
| // `fuchsia.hardware.network.device.MacAddrImpl` that grants access to the requested operating state |
| // of its interface. |
| // |
| // `MacAdapter` is used to provide the business logic of virtual MacAddr implementations both for |
| // `tun.Device` and `tun.DevicePair` device classes. |
| class MacAdapter : public ddk::MacAddrImplProtocol<MacAdapter>, public MacAddrDeviceInterface { |
| public: |
| // Creates a new `MacAdapter` with `parent`. |
| // `mac` is the device's own MAC address, reported to the MacAddrDeviceInterface. |
| // if `promisc_only` is true, the only filtering mode reported to the interface will be |
| // `MODE_PROMISCUOUS`. |
| // On success, the adapter is stored in `out`. |
| static zx_status_t Create(MacAdapterParent* parent, fuchsia::net::MacAddress mac, |
| bool promisc_only, std::unique_ptr<MacAdapter>* out); |
| // Binds the request channel to the MacAddrDeviceInterface. Requests will be served over the |
| // provided `dispatcher`. |
| zx_status_t Bind(async_dispatcher_t* dispatcher, zx::channel req); |
| // Tears down this adapter and calls `callback` when teardown is finished. |
| // Tearing down causes all client channels to be closed. |
| // There are no guarantees over which thread `callback` is called. |
| // It is invalid to attempt to tear down an adapter that is already tearing down or is already |
| // torn down. |
| void Teardown(fit::callback<void()> callback); |
| // Same as `Teardown`, but blocks until teardown is complete. |
| void TeardownSync(); |
| |
| const fuchsia::net::MacAddress& mac() { return mac_; } |
| |
| // MacAddrImpl protocol: |
| void MacAddrImplGetAddress(uint8_t out_mac[MAC_SIZE]); |
| void MacAddrImplGetFeatures(features_t* out_features); |
| void MacAddrImplSetMode(mode_t mode, const uint8_t* multicast_macs_list, |
| size_t multicast_macs_count); |
| |
| // Clones the internal mac state into `out`. |
| void CloneMacState(fuchsia::net::tun::MacState* out); |
| |
| private: |
| MacAdapter(MacAdapterParent* parent, fuchsia::net::MacAddress mac, bool promisc_only) |
| : parent_(parent), mac_(mac), promisc_only_(promisc_only) {} |
| |
| fbl::Mutex state_lock_; |
| std::unique_ptr<MacAddrDeviceInterface> device_; |
| MacAdapterParent* const parent_; // pointer to parent, not owned. |
| fuchsia::net::MacAddress mac_; |
| const bool promisc_only_; |
| fuchsia::net::tun::MacState mac_state_ __TA_GUARDED(state_lock_); |
| }; |
| |
| } // namespace tun |
| } // namespace network |
| |
| #endif // SRC_CONNECTIVITY_NETWORK_TUN_NETWORK_TUN_MAC_ADAPTER_H_ |