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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#include "host_manager.hpp"
#include "socket_manager.hpp"
#include <cstdint>
#include <mutex>
#include <string>
#include <thread>
class Nemora
{
public:
/**
* Constructs a Nemora object.
* - iface_name: The networking interface to use (eg. eth0)
* - ipv4: Target IPv4 address for UDP communication, i.e., POST streaming.
* - ipv6: Target IPv6 address for UDP communication, i.e., POST streaming.
*/
Nemora(const std::string& iface_name, const in_addr ipv4,
const in6_addr ipv6);
/**
* Construct uninitialized Nemora object
*/
Nemora();
/**
* Cancels polling threads and destructs Nemora object.
*/
~Nemora() = default;
/**
* Loops collecting the current state of event_data_ and sending via UDP.
*/
void UdpPoll();
private:
/**
* Initialize event_data_ with default values.
* This is used by constructors.
*/
void InitEventData();
/**
* Fetches MAC from host
* - mac: out-parameter for host mac address
* - iface_path: DBus path to network interface, typically
* IFACE_ROOT + iface_path_.
*
* - returns: true if address was populated correctly, false if error
*/
bool GetMacAddr(MacAddr* mac, const std::string& iface_path);
/**
* Converts from string to struct
* - mac_addr: string of format MAC_FORMAT
* - mac: out-parameter with MAC from mac_addr populated. must be allocated
* by caller
*
* - returns: true if mac_addr was correct format, false otherwise
*/
bool ParseMac(const std::string& mac_addr, MacAddr* mac);
/**
* Update event_data_ from host.
* - postcodes: list of postcodes polled.
* Forced to bind to temporary to avoid copying.
*/
void UpdateEventData(std::vector<uint64_t>&& postcodes);
NemoraEvent event_data_ = {};
std::mutex event_data_mutex_;
SocketManager socketManager_;
HostManager hostManager_;
const std::string iface_path_;
};