EthernetCompat.h

#pragma once

#include <LwipEthernet.h>
#include <WiFiUdp.h>
#include <WiFiClient.h>
#include <ArduinoWiFiServer.h>

using EthernetUDP    = WiFiUDP;
using EthernetClient = WiFiClient;
using EthernetServer = ArduinoWiFiServer;

enum
{
    DHCP_CHECK_NONE        = 0,
    DHCP_CHECK_RENEW_FAIL  = 1,
    DHCP_CHECK_RENEW_OK    = 2,
    DHCP_CHECK_REBIND_FAIL = 3,
    DHCP_CHECK_REBIND_OK   = 4,
};

enum HardwareStatus
{
    EthernetNoHardware,
    EthernetHardwareFound,
};

template<class RawDev>
class ArduinoEthernet: public LwipIntfDev<RawDev>
{
public:
    ArduinoEthernet(int8_t cs = SS, SPIClass& spi = SPI, int8_t intr = -1) :
        LwipIntfDev<RawDev>(cs, spi, intr)
    {
        _hardwareStatus = EthernetNoHardware;
    }

    // Arduino-Ethernet API compatibility, order can be either:
    // mac, ip, gateway, netmask, dns (esp8266 or natural order)
    // mac, ip, dns, gateway, netmask (Arduino legacy)
    boolean begin(const uint8_t* macAddress, IPAddress local_ip = IPADDR_NONE,
                  IPAddress arg1 = IPADDR_NONE, IPAddress arg2 = IPADDR_NONE,
                  IPAddress arg3 = IPADDR_NONE)
    {
        if (local_ip.isSet() && local_ip.isV4())
        {
            // setting auto values using arduino ordering of parameters
            if (arg1 == IPADDR_NONE)  // else dns or gw
            {
                arg1    = local_ip;
                arg1[3] = 1;
            }
            if (arg2 == IPADDR_NONE)  // else gw or mask
            {
                arg2    = local_ip;
                arg2[3] = 1;
            }
            // if arg2 is mask (esp ordering), let DNS IP unconfigured
            if (arg3 == IPADDR_NONE && arg2[0] != 255)  // else mask or dns
            {
                arg3 = IPAddress(255, 255, 255, 0);
            }
        }
        SPI4EthInit();  // Arduino Ethernet self-initializes SPI
        bool ret = true;
        if (local_ip.isSet())
            ret = LwipIntfDev<RawDev>::config(local_ip, arg1, arg2, arg3);
        if (ret)
        {
            ret = LwipIntfDev<RawDev>::begin(macAddress);
            if (!local_ip.isSet())
            {
                // Arduino API waits for DHCP answer
                while (!LwipIntfDev<RawDev>::connected())
                {
                    delay(100);
                }
            }
        }

        if (ret)
        {
            _hardwareStatus = EthernetHardwareFound;
        }

        return ret;
    }

    void end()
    {
        ip_addr_copy(LwipIntfDev<RawDev>::_netif.ip_addr,
                     ip_addr_any);  // to allow DHCP at next begin
        LwipIntfDev<RawDev>::end();
    }

    HardwareStatus hardwareStatus() const
    {
        return _hardwareStatus;
    }

    int maintain() const
    {
        return DHCP_CHECK_NONE;
    }

    void MACAddress(uint8_t* mac)
    {
        LwipIntfDev<RawDev>::macAddress(mac);
    }

    IPAddress dnsServerIP() const
    {
        return LwipIntfDev<RawDev>::dnsIP(0);
    }

    void setDnsServerIP(const IPAddress dnsIP)
    {
        LwipIntfDev<RawDev>::setDNS(dnsIP);
    }

protected:
    HardwareStatus _hardwareStatus;
};

using ArduinoWiznet5500lwIP = ArduinoEthernet<Wiznet5500>;
using ArduinoWiznet5100lwIP = ArduinoEthernet<Wiznet5100>;
using ArduinoENC28J60lwIP   = ArduinoEthernet<ENC28J60>;