IPv6 anyone?

Hello,

I am trying to connect to a raw socket IPv6 host with no success. Please help.

Whenever I try this I get the same exception.

I am using Unity 4.2.0, .NET 4.5.1, Win 7 and the system has both IPv4 and IPv6 TCP stacks enabled, as shown in this output:

Code (csharp):

1. F:\Users\Ozelo\Downloads\AsyncResolveNameChap6CS\AsyncResolveNameChap6CS\AsyncRe
2. solveNameChap6CS\bin\Debug>AsyncResolveNameChap6CS.exe google.com
3. BeginGetHostEntry() is OK...
4. Press any key to stop this program...
5.  
6. The primary host name is: google.com
7. No Aliases found...
8. IP addresses found are:
9. IPv6 Address #1 is 2800:3f0:4001:817::1005
10. IPv4 Address #1 is 173.194.118.232
11. IPv4 Address #2 is 173.194.118.224
12. IPv4 Address #3 is 173.194.118.233
13. IPv4 Address #4 is 173.194.118.226
14. IPv4 Address #5 is 173.194.118.225
15. IPv4 Address #6 is 173.194.118.238
16. IPv4 Address #7 is 173.194.118.229
17. IPv4 Address #8 is 173.194.118.227
18. IPv4 Address #9 is 173.194.118.228
19. IPv4 Address #10 is 173.194.118.230
20. IPv4 Address #11 is 173.194.118.231
21. Finished querying DNS.
22.  
23. Read() is OK...
24.  

The program used to check if GetHostEntry works can be found here.

For some reason I don't know, Socket.SupportsIPv6 return FALSE but Socket.OSSupportsIPv6 return TRUE. This is the code I did on Unity that is NOT giving me any IPv6 address:

Code (csharp):

1. #pragma strict
2. import System.Net;
3. import System.Net.Sockets;
4.  
5. private var ipv6addr="unavailable?";
6. private var ipv4addr="unavailable?";
7. private var ssipv6="TRUE";
8. private var osipv6="TRUE";
9.  
10. function Start() {
11.     if (!Socket.SupportsIPv6) ssipv6 = "FALSE";
12.     if (!Socket.OSSupportsIPv6) osipv6 = "FALSE";
13.     var RemoteHost: IPHostEntry = Dns.GetHostEntry("google.com");
14.     for (var ASimpleIPAddr: IPAddress in RemoteHost.AddressList) {
15.         if (ASimpleIPAddr.AddressFamily != AddressFamily.InterNetwork) ipv6addr = ASimpleIPAddr.ToString();
16.         else ipv4addr = ASimpleIPAddr.ToString();
17.     }
18. }
19.  
20. function OnGUI() {
21.     var mX = (Screen.width / 2);
22.     var mY = (Screen.height / 2);
23.     var box_width = mX;
24.     var box_height = mY;
25.     var box_lx = mX - (box_width / 2);
26.     var box_ly = mY - (box_height / 2);
27.     GUI.Box(Rect(box_lx, box_ly, box_width, box_height), "DUAL STACK INFO");
28.     GUI.Label(Rect(box_lx + 6, box_ly + 30, box_width, 20), "IPv6 Address:  " + ipv6addr);
29.     GUI.Label(Rect(box_lx + 6, box_ly + 45, box_width, 20), "IPv4 Address:  " + ipv4addr);
30.     GUI.Label(Rect(box_lx + 6, box_ly + 60, box_width, 20), "Socket.OSSupportsIPv6?   " + osipv6);
31.     GUI.Label(Rect(box_lx + 6, box_ly + 75, box_width, 20), "Socket.SupportsIPv6?   " + ssipv6);
32. }
33.  

 

I just found that the Unity3D code above works perfectly on Linux Ubuntu 12.04 and I don´t know why it won't work on my Windows 7 station... I am clueless.

 

I am clueless, definitely. The same code. I couldn't figure why it works on Linux but does NOT work on Windows. Both machines have IPv6 enabled. Please, could any of you test it and give me some feed-back if it works on your system? It should state how are your dual stack and give back the google.com IPv4 and IPv6 addresses. Here are the files:

IPCheck.rar (Windows version)

LIPCheck.rar (Linux version)

 

We have this same problem on 5.3.5 - it came down to using ".Net 2.0" compatibility in the player build settings rather than ".Net 2.0 Subset". I'm not sure *why* it works, as technically .Net 2.0 should have everything that the subset has and more, but try switching them.

This is the bug report if you're interested: https://fogbugz.unity3d.com/default.asp?804510_c5ei44diq6ktnh1u

Also, in this thread (http://forum.unity3d.com/threads/unity-ios-and-ipv6-support.404938/#post-2676696) they specifically said they didn't backport some IPv6 fixes to the Unity4 windows branch, so it might just be that as well.