1 /*
2  * Copyright 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <list>
20 #include <memory>
21 #include <vector>
22 
23 #include "phy.h"
24 #include "phy_device.h"
25 
26 namespace rootcanal {
27 
28 using rootcanal::PhyDevice;
29 
30 class PhyLayer {
31  public:
32   using Identifier = uint32_t;
33 
34   PhyLayer(Identifier id, Phy::Type type);
~PhyLayer()35   virtual ~PhyLayer() {}
36 
37   void Tick();
38   virtual void Send(std::vector<uint8_t> const& packet, int8_t tx_power,
39                     PhyDevice::Identifier sender_id);
40 
41   // Compute the RSSI for a packet sent from one device to the other
42   // with the specified TX power.
43   virtual int8_t ComputeRssi(PhyDevice::Identifier sender_id,
44                              PhyDevice::Identifier receiver_id,
45                              int8_t tx_power);
46 
47   void Register(std::shared_ptr<PhyDevice> device);
48   void Unregister(PhyDevice::Identifier device_id);
49   void UnregisterAll();
50 
51   std::string ToString() const;
52 
53   // Id and type are public but immutable.
54   const Identifier id;
55   const Phy::Type type;
56 
57  protected:
58   // List of devices currently connected to the phy.
59   std::list<std::shared_ptr<rootcanal::PhyDevice>> phy_devices_;
60 };
61 
62 }  // namespace rootcanal
63