int NetUDP_Client::create(char *server_IP, unsigned int port){
	
	echoServPort = port;	//	8888
	servIP = server_IP;		//	"127.0.0.1"
	
	//	GET A SOCKET
	if((sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0){
		//DieWithError("socket() failed");
		std::cout << "socket() failed" << std::endl;
	}
	
	//	INIT ADDRESS STRUCT
	memset(&echoServAddr, 0, sizeof(echoServAddr));
	echoServAddr.sin_family = AF_INET;
	echoServAddr.sin_addr.s_addr = inet_addr(servIP);
	echoServAddr.sin_port = htons(echoServPort);
	
	return 0;
}

int NetUDP_Client::send_msg(char *echoString){
	
	int BUFLEN = 255;
	unsigned int max_buf = BUFLEN;
	char echoBuffer[BUFLEN+1];
	
	//	CALC SIZE OF MESSAGE
	unsigned int echoStringLen = strlen(echoString);
	
	//	SEND MESSAGE
	if(sendto(sock, echoString, echoStringLen, 0, (struct sockaddr *) &echoServAddr, sizeof(echoServAddr)) != echoStringLen){
		//DieWithError("sendto() sent a different number of bytes than expected");
	}
	
	//	INIT RESULT BUFFER
	memset(echoBuffer,'\0', BUFLEN);
	
	//	RECEIVE RESULT
	response_result = timeout_recvfrom(sock, echoBuffer, &max_buf, &echoServAddr, 1);	//	int sock, char *buf, int *length, struct sockaddr_in *connection, int timeoutinseconds
	std::cout << "result: " << response_result << std::endl;
	if(response_result){
		std::cout << "response: " << echoBuffer << std::endl;
	}else{
		std::cout << "timed out" << std::endl;
	}
	
	return response_result;
}

int NetUDP_Client::timeout_recvfrom (int sock, char *buf, unsigned int *length, struct sockaddr_in *connection, int timeoutinseconds)
{
    fd_set socks;
    struct timeval t;
    
    //	SET FILE DESCRIPTOR TO NON-BLOCKING
    fcntl(sock, F_SETFL, O_NONBLOCK);
    
    //	INIT BUFFER
    FD_ZERO(&socks);
    FD_SET(sock, &socks);
    
    //	INIT TIME STRUCT
    t.tv_sec = timeoutinseconds;
    t.tv_usec = 0;
    
    //	CHECK FILE DESCRIPTOR
    int rv = select(sock + 1, &socks, NULL, NULL, &t);
    //if(select(sock + 1, &socks, NULL, NULL, &t) && recvfrom(sock, buf, *length, 0, (struct sockaddr *)connection, length)!=-1)
    
    if(rv != -1){
    	//	RECEIVE DATA
    	int n = recvfrom(sock, buf, *length, 0, (struct sockaddr *)connection, length);
		if(n!=-1)
		{
			return n;
		}
	}
	else{
		//	errno, 
	}
	return 0;
}