using UnityEngine;
using System.Collections;
using System;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;
public class UDPSend : MonoBehaviour
{
private static int localPort;
// prefs
private string IP; // define in init
public int port; // define in init
// "connection" things
IPEndPoint remoteEndPoint;
UdpClient client;
// gui
string strMessage="";
// call it from shell (as program)
private static void Main()
{
UDPSend sendObj=new UDPSend();
sendObj.init();
// testing via console
// sendObj.inputFromConsole();
// as server sending endless
sendObj.sendEndless(" endless infos \n");
}
// start from unity3d
public void Start()
{
init();
}
// OnGUI
void OnGUI()
{
Rect rectObj=new Rect(40,380,200,400);
GUIStyle style = new GUIStyle();
style.alignment = TextAnchor.UpperLeft;
GUI.Box(rectObj,"# UDPSend-Data\n127.0.0.1 "+port+" #\n"
+ "shell> nc -lu 127.0.0.1 "+port+" \n"
,style);
// ------------------------
// send it
// ------------------------
strMessage=GUI.TextField(new Rect(40,420,140,20),strMessage);
if (GUI.Button(new Rect(190,420,40,20),"send"))
{
sendString(strMessage+"\n");
}
}
// init
public void init()
{
// Endpunkt definieren, von dem die Nachrichten gesendet werden.
print("UDPSend.init()");
// define
IP="127.0.0.1";
port=8051;
// ----------------------------
// Senden
// ----------------------------
remoteEndPoint = new IPEndPoint(IPAddress.Parse(IP), port);
client = new UdpClient();
// status
print("Sending to "+IP+" : "+port);
print("Testing: nc -lu "+IP+" : "+port);
}
// inputFromConsole
private void inputFromConsole()
{
try
{
string text;
do
{
text = Console.ReadLine();
// Den Text zum Remote-Client senden.
if (text != "")
{
// Daten mit der UTF8-Kodierung in das Binärformat kodieren.
byte[] data = Encoding.UTF8.GetBytes(text);
// Den Text zum Remote-Client senden.
client.Send(data, data.Length, remoteEndPoint);
}
} while (text != "");
}
catch (Exception err)
{
print(err.ToString());
}
}
// sendData
private void sendString(string message)
{
try
{
//if (message != "")
//{
// Daten mit der UTF8-Kodierung in das Binärformat kodieren.
byte[] data = Encoding.UTF8.GetBytes(message);
// Den message zum Remote-Client senden.
client.Send(data, data.Length, remoteEndPoint);
//}
}
catch (Exception err)
{
print(err.ToString());
}
}
// endless test
private void sendEndless(string testStr)
{
do
{
sendString(testStr);
}
while(true);
}
}
using UnityEngine;
using System.Collections;
using System;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;
public class UDPReceive : MonoBehaviour {
// receiving Thread
Thread receiveThread;
// udpclient object
UdpClient client;
// public
// public string IP = "127.0.0.1"; default local
public int port; // define > init
// infos
public string lastReceivedUDPPacket="";
public string allReceivedUDPPackets=""; // clean up this from time to time!
// start from shell
private static void Main()
{
UDPReceive receiveObj=new UDPReceive();
receiveObj.init();
string text="";
do
{
text = Console.ReadLine();
}
while(!text.Equals("exit"));
}
// start from unity3d
public void Start()
{
init();
}
// OnGUI
void OnGUI()
{
Rect rectObj=new Rect(40,10,200,400);
GUIStyle style = new GUIStyle();
style.alignment = TextAnchor.UpperLeft;
GUI.Box(rectObj,"# UDPReceive\n106.51.8.242 "+port+" #\n"
+ "shell> nc -u 106.51.8.242 : "+port+" \n"
+ "\nLast Packet: \n"+ lastReceivedUDPPacket
+ "\n\nAll Messages: \n"+allReceivedUDPPackets
,style);
}
// init
private void init()
{
// Endpunkt definieren, von dem die Nachrichten gesendet werden.
print("UDPSend.init()");
// define port
port = 443;
// status
print("Sending to 127.0.0.1 : "+port);
print("Test-Sending to this Port: nc -u 127.0.0.1 "+port+"");
// ----------------------------
// Abhören
// ----------------------------
// Lokalen Endpunkt definieren (wo Nachrichten empfangen werden).
// Einen neuen Thread für den Empfang eingehender Nachrichten erstellen.
receiveThread = new Thread(
new ThreadStart(ReceiveData));
receiveThread.IsBackground = true;
receiveThread.Start();
}
// receive thread
private void ReceiveData()
{
client = new UdpClient(port);
while (true)
{
try
{
// Bytes empfangen.
IPEndPoint anyIP = new IPEndPoint(IPAddress.Any, 0);
byte[] data = client.Receive(ref anyIP);
// Bytes mit der UTF8-Kodierung in das Textformat kodieren.
string text = Encoding.UTF8.GetString(data);
// Den abgerufenen Text anzeigen.
print(">> " + text);
// latest UDPpacket
lastReceivedUDPPacket=text;
// ....
allReceivedUDPPackets=allReceivedUDPPackets+text;
}
catch (Exception err)
{
print(err.ToString());
}
}
}
// getLatestUDPPacket
// cleans up the rest
public string getLatestUDPPacket()
{
allReceivedUDPPackets="";
return lastReceivedUDPPacket;
}
}
I am trying to send co-ordinates as string from one system to other, read the string in the next system and move a object accordingly. I am using UDP for the transmission purpose. I got the code to send and recieve string using UDP from the forum itself but it uses a dummy IP and port to connect which only works if both the programs i.e send and recieve are on the same system which does not suffice my requirement. I tried changing the IP to the IP of the other system but i can’t figure what should i change the port to.
Can someone tell how to know the port of any server or what should i change?