ddnet/src/engine/server/upnp.cpp

#ifdef CONF_UPNP

#include "upnp.h"
#include <base/system.h>
#include <engine/shared/config.h>
#include <game/version.h>
#include <miniupnpc/miniupnpc.h>
#include <miniupnpc/upnpcommands.h>
#include <miniupnpc/upnperrors.h>

#include <cstdlib>

void CUPnP::Open(NETADDR Address)
{
	if(g_Config.m_SvUseUPnP)
	{
		m_Enabled = false;
		m_Addr = Address;
		m_pUPnPUrls = (struct UPNPUrls *)malloc(sizeof(struct UPNPUrls));
		m_pUPnPData = (struct IGDdatas *)malloc(sizeof(struct IGDdatas));

		char aLanAddr[64];
		char aPort[6];
		int Error;

		m_pUPnPDevice = upnpDiscover(2000, NULL, NULL, 0, 0, 2, &Error);

		int Status = UPNP_GetValidIGD(m_pUPnPDevice, m_pUPnPUrls, m_pUPnPData, aLanAddr, sizeof(aLanAddr));
		dbg_msg("upnp", "status=%d, lan_addr=%s", Status, aLanAddr);

		if(Status == 1)
		{
			m_Enabled = true;
			dbg_msg("upnp", "found valid IGD: %s", m_pUPnPUrls->controlURL);
			str_from_int(m_Addr.port, aPort);
			Error = UPNP_AddPortMapping(m_pUPnPUrls->controlURL, m_pUPnPData->first.servicetype,
				aPort, aPort, aLanAddr,
				"DDNet Server " GAME_RELEASE_VERSION,
				"UDP", NULL, "0");

			if(Error)
				dbg_msg("upnp", "failed to map port, error: %s", strupnperror(Error));
			else
				dbg_msg("upnp", "successfully mapped port");
		}
		else
			dbg_msg("upnp", "no valid IGD found, disabled");
	}
}

void CUPnP::Shutdown()
{
	if(g_Config.m_SvUseUPnP)
	{
		if(m_Enabled)
		{
			char aPort[6];
			str_from_int(m_Addr.port, aPort);
			int Error = UPNP_DeletePortMapping(m_pUPnPUrls->controlURL, m_pUPnPData->first.servicetype, aPort, "UDP", NULL);

			if(Error != 0)
			{
				dbg_msg("upnp", "failed to delete port mapping on shutdown: %s", strupnperror(Error));
			}
			FreeUPNPUrls(m_pUPnPUrls);
			freeUPNPDevlist(m_pUPnPDevice);
		}
		free(m_pUPnPUrls);
		free(m_pUPnPData);
		m_pUPnPUrls = NULL;
		m_pUPnPData = NULL;
	}
}

#endif