#define ENABLE_AUTODETECT_INTERNAL_IP
bool GetIPInfo()
{
#ifndef __WIN32__
	struct ifaddrs* ifaddrp = NULL;

	if (0 != getifaddrs(&ifaddrp))
		return false;

	for( struct ifaddrs* ifap=ifaddrp ; NULL != ifap ; ifap = ifap->ifa_next )
	{
		struct sockaddr_in * sai = (struct sockaddr_in *) ifap->ifa_addr;

		if (!ifap->ifa_netmask ||  // ignore if no netmask
				sai->sin_addr.s_addr == 0 || // ignore if address is 0.0.0.0
				sai->sin_addr.s_addr == 16777343) // ignore if address is 127.0.0.1
			continue;
#else
	WSADATA wsa_data;
	char host_name[100];
	HOSTENT* host_ent;
	int n = 0;

	if (WSAStartup(0x0101, &wsa_data)) {
		return false;
	}

	gethostname(host_name, sizeof(host_name));
	host_ent = gethostbyname(host_name);
	if (host_ent == NULL) {
		return false;
	}
	for ( ; host_ent->h_addr_list[n] != NULL; ++n) {
		struct sockaddr_in addr;
		struct sockaddr_in* sai = &addr;
		memcpy(&sai->sin_addr.s_addr, host_ent->h_addr_list[n], host_ent->h_length);
#endif

		char * netip = inet_ntoa(sai->sin_addr);

		if (!strncmp(netip, "192.168", 7)) // ignore if address is starting with 192
		{
			strlcpy(g_szInternalIP, netip, sizeof(g_szInternalIP));
#ifndef __WIN32__
			fprintf(stderr, "INTERNAL_IP: %s interface %s\n", netip, ifap->ifa_name);
#else
			fprintf(stderr, "INTERNAL_IP: %s\n", netip);
#endif
		}
		else if (!strncmp(netip, "10.", 3))
		{
			strlcpy(g_szInternalIP, netip, sizeof(g_szInternalIP));
#ifndef __WIN32__
			fprintf(stderr, "INTERNAL_IP: %s interface %s\n", netip, ifap->ifa_name);
#else
			fprintf(stderr, "INTERNAL_IP: %s\n", netip);
#endif
		}
		else if (g_szPublicIP[0] == '0')
		{
			strlcpy(g_szPublicIP, netip, sizeof(g_szPublicIP));
#ifndef __WIN32__
			fprintf(stderr, "PUBLIC_IP: %s interface %s\n", netip, ifap->ifa_name);
#else
			fprintf(stderr, "PUBLIC_IP: %s\n", netip);
#endif
		}
	}

#ifndef __WIN32__
	freeifaddrs( ifaddrp );
#else
	WSACleanup();
#endif

	if (g_szPublicIP[0] != '0')
		return true;
	else
	{
#ifdef ENABLE_AUTODETECT_INTERNAL_IP
		if (g_szInternalIP[0] == '0')
			return false;
		else
			strlcpy(g_szPublicIP, g_szInternalIP, sizeof(g_szPublicIP));
			return true;
#else
		return false;
#endif
	}
}