Unity Hangs When Running a simple script

I run this in the editor and it causes my editor to freeze.

using System;
using System.Net;
using System.Net.Sockets;
using UnityEngine;
using System.Collections;
public class IPv6test : MonoBehaviour {

// Use this for initialization
void Start () {
Socket s;
s = new Socket(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.Udp);
IPAddress ip = IPAddress.Parse("ff15::2");
s.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.AddMembership, new IPv6MulticastOption(ip));
IPEndPoint ipep = new IPEndPoint(IPAddress.IPv6Any, 26000);
s.Bind(ipep);

while (true)
{
byte[] b = new byte[1024];
s.Receive(b);
string str = System.Text.Encoding.ASCII.GetString(b, 0, b.Length);
Console.WriteLine(str.Trim());
}
}

// Update is called once per frame
void Update () {

}
}

 

That looks like it definitely should cause your editor to freeze - your Start function has an infinite While loop, which will block the main thread. I don't think this is related to the new scripting preview build.

 

This is exactly the case.

Also, please use code tags.

 

Thanks for pointing that out, I was just copy pasting from this SO post. http://stackoverflow.com/questions/26046473/ipv6-socket-works-in-mono-console-app-but-not-unity-app

It seems to work better now but still hangs at s.Receive(b);

 

I would suggest moving your post to the appropriate forum, as this is primarily for the experimental build.

But as a super quick answer: it is correct to hang on a socket.Receive call until it receives data. You cannot simply copy-paste this code example and have something working - what are you receiving from? Have you created a server running on port 26000? Are you connecting to the correct IP address? If you want to skip through to the answer of "don't block the game when i call receive" then use the function BeginReceive instead of Receive.