LwipDhcpServer-NonOS.cpp

/*
    lwIPDhcpServer-NonOS.cpp - DHCP server wrapper

    Copyright (c) 2020 esp8266 arduino. All rights reserved.
    This file is part of the esp8266 core for Arduino environment.

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

// STARTS/STOPS DHCP SERVER ON WIFI AP INTERFACE
// these functions must exists as-is with "C" interface,
// nonos-sdk calls them at boot time and later

#include <lwip/init.h> // LWIP_VERSION

#include <lwip/netif.h>
#include "LwipDhcpServer.h"

extern netif netif_git[2];

// global DHCP instance for softAP interface
DhcpServer dhcpSoftAP(&netif_git[SOFTAP_IF]);

extern "C"
{

    void dhcps_start(struct ip_info *info, netif* apnetif)
    {
        // apnetif is esp interface, replaced by lwip2's
        // netif_git[SOFTAP_IF] interface in constructor
        (void)apnetif;

#if 0
        // can't use C++ now, global ctors are not initialized yet
        dhcpSoftAP.begin(info);
#else
        (void)info;
        // initial version: emulate nonos-sdk in DhcpServer class before
        //                  trying to change legacy behavor
        // `fw_has_started_softap_dhcps` will be read in DhcpServer::DhcpServer
        // which is called when c++ ctors are initialized, specifically
        // dhcpSoftAP initialized with AP interface number above.
        fw_has_started_softap_dhcps = 1;
#endif
    }

    void dhcps_stop()
    {
        dhcpSoftAP.end();
    }

} // extern "C"