I want to create a tunnel between my computer (which is connected to the router via ethernet and runs on windows) and another computer in the same subnet.
I chose WINTUN.dll for this purpose because it is much faster and more efficient than OpenVPN.
I can't find a way to start a season on the ethernet adapter on my laptop!
I tried using the adapter name found on MS INFO:
WINTUN_ADAPTER_HANDLE Adapter = WintunOpenAdapter(L"Realtek USB GbE Family Controller");'
Result: "error creating adapter, code: 1168"
I searched the library documentation and could not find anything on the subject.
Will Wintun work under any circumstances with non-Wintun adapters?
Any help will be appreciated! thank you!
You cant open your Realtek USB (...) Ethernet Adapter. Wintun is used to create a Layer 3 Network Adapter. You need to initialize wintun and afterwards create an Adapter. If there isnt one in your adapter settings, you cant open one. Id encourage you to implement the example.c from wintun.net. This way you will get the hang of it. If you want to use wintun for your scenario you will need to implement it by yourself. OpenVPN might be slow because it uses a TAP Adapter (wild guess) but you can change it to a tun adapter (e.g wintun). Hope that helps :)
Related
We have an NDIS LWF driver, and it seems like it cannot get attached to Virtual Network Adapters, for example the one that Kerio Control VPN client creates (Kerio Virtual Network).
When i try to install the NDIS LWF in the network adapter manually by giving it our INF file (Install -> service -> Have disk), the driver doesn't appear in the network service list.
Then i found out that i if add nolower in the FilterMediaTypes in the inf file, it does appear in the network service list, but even then, when i click on OK, it doesn't get added to the list of items and doesn't get attached.
My question is, How can i attach to this Kerio Virtual Network Adapter in order to monitor its packets?
LWFs cannot bind to a network interface that has HKR, Ndi\Interfaces,LowerRange,,nolower in its INF. Generally speaking, the network interface ought to have at least one real LowerRange, and it's reasonable to ask the vendor to add one. For whatever it's worth, we (the Windows OS team) originally shipped the Bluetooth PAN adapter with nolower, and then later realized we needed to update it to have something there, so LWFs could bind to it. Perhaps that anecdote helps motivate this vendor to update their INF.
If the NDIS datapath uses a 14 byte Ethernet-like header and is roughly compatible with Ethernet's ideas of unicast & multicast, then ethernet is the correct thing to put in LowerRange. See the docs for more details.
It's not supported to try and add the nolower token to your LWF driver INF's FilterMediaTypes; you can't reasonably expect to bind to any unknown type of interface. What if the next network adapter indicates packets in some yet-to-be-invented framing layer — how could your LWF possibly make sense of those packets? For that reason, nolower is not a binding interface; it's a special token that means "the empty list".
LWFs also cannot bind to CoNDIS network adapters. This is simply because the LWF programming model has never been extended to cover all the additional signaling for connection management.
I am not personally familiar with the "Kerio" network interface — I don't know if it has nolower in its INF or whether it's CoNDIS (!ndiskd would tell you this). If it's the former, you should ask that vendor to update their INF.
I am playing around with an application to do some remote connection and I am struggling with understanding the tun/tap. I have installed OpenVPN tuntap driver and can connect/configure it through my application but I need some clarification.
If I use it in TAP mode I need to bridge my network adapters correct??
How would a TUN interface be setup?? I know that I need to call DeviceIoControl with TAP_IOCTL_CONFIG_TUN and I think I understand how but my research leads me to think I also need to add into the windows routing tables??
Can someone layout what a typical TUN Layer3 VPN would look like
Thanks
Matt
How do I control the network interface on Windows? Actually, the idea is quiet simple.
Establish connect to a certain adapter on a computer.
Direct whole traffic of the adapter to this program.
Give the rights to this program what must be transfer to the adapter and what should not.
I think the program has to implement any windows network adapter interface and be registered as an adapter driver. Thus, when it wants to transfer data to real adapter, the program has to call adapter driver methods. In their turn, the methods implement the same windows network interface (or that is called in other way don't really know, I hope you get the sense), don't they?
As a result, we have a kind of inheritance here.
Before use our new driver:
windows application and windows itself
________________________ windows network interface
DRIVER of Adapter1
________________________ end of OS boundaries
Adapter 1
Use our new driver:
windows application and windows itself
________________________ windows network interface
our DRIVER
________________________ windows network interface
DRIVER of Adapter1
________________________ end of OS boundaries
Adapter 1
I believe that kind of interface exists and I hope it is realized very easy.
You will likely need to hook Windows API calls to really do this. It is possible... Start by Googling hook API and Winternals - and see if you can find their sample code.
Before Winternals was bought by Microsoft they published their code. http://technet.microsoft.com/en-us/sysinternals/bb545021
The idea is this:
You write a user-mode program which controls your hooking device
driver.
Your hooking device driver determines if network traffic on
given API calls is ok.
Driver allows normal API calls to succeed if they are.
First off, you guys are all really helpful - thank you a lot!
Is there a way to figure out what type of network a Mac is connected to? WiFi? Cable? USB Modem? Any Cocoa / Foundation framework I can use to figure that out?
Thank you,
Matthias
You can tell whether the Mac is using WiFi, whether it is using a modem, and whether it is using hard Ethernet (which could be cable, DSL, or something else). Note that these are not mutually exclusive, there may be multiple connections of a single type (I have two Ethernet ports, for example), and that being connected to an IP network does not necessarily mean connection to the Internet.
You'll probably find the System Configuration API helpful. See also the framework reference.
You may also want to look at the source for HardwareGrowler in the Extras folder of the Growl source code.
You could ask for the route table and see what the default route is, that would tell you to some degree of accuracy what the active connection is.
This obviously has a lot to do with how you define 'some degree of accuracy'. Generally the main internet connection will also be the default route. I'm assuming you also want active connection to mean 'internet connection'.
netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default 192.168.0.1 UGSc 22 14 en1
so for me, my default route goes out the en1 interface. I think you need to be a lot more specific on what you mean by 'active/current' means to you.
CAVEAT: just because my default gw is on en1, does not necessarily mean that's where all my inet traffic goes. (it happens to be true in my case, but don't count on it as truth, but would probably be correct more than half the time).
I'm looking for a method to acurately determine if an interface is the physical 802.3 ethernet port on a pc in windows.
Using ipconfig /all I can list all the interfaces, and when I do this on my pc several entries can be listed here including VPN, Bluetooth, Wifi and the physical ethernet interface.
I'm looking for something like, "isPhysical(interface)".
(It's ok to have multiple physical lan ports, I just want to know if it is a physical port or not).
UPDATE:
Jay and Chris thanks!
(Not enough space in the comments so I'll post here)
I'm currently looking at using WMI Win32_NetworkAdapter.
However, it shows 4 interfaces with AdapterType="Ethernet 802.3".
I only have 1 phyical port on my pc the others have the Name, "Virtual Machine Network Services Driver". (I assume these are installed by my company for some nefarious reason)
I found the attribute I need in the interface, but it's not available in winXP!!!
PhysicalAdapter Data type: boolean
Access type: Read-only
Indicates whether the adapter is a
physical or a logical adapter. If
True, the adapter is physical. Windows
Server 2003, Windows XP, Windows 2000,
and Windows NT 4.0: This property is
not available.
Is there any way to determine if it's a physical port, other than doing a text filter for the word "Virtual" in the name?
UPDATE 12/08
Looks like the virtual interfaces are added when you have a VM installed.
Here's some details about the virtual adapter:
http://blogs.msdn.com/virtual_pc_guy/archive/2005/04/01/404816.aspx
Found an issue where if the user doesn't have admin rights the WMI interface doesn't return the data needed. So, now looking at the GetAdapterInfo method. However, it seems to add 'virtual machine services driver" to the actual adapter's description, making the 'virtual' text check invalid.
And the structure returned by GetAdapterInfo:
http://msdn.microsoft.com/en-us/library/aa366062(VS.85).aspx
Call GetIfEntry and look for a dwType of IF_TYPE_ETHERNET_CSMACD in the MIB_IFROW structure returned.
Or in .NET, look for a System.Net.NetworkInformation.NetworkInterface with a NetworkInterfaceType of Ethernet.
The best way I've seen so far with any system Windows 2000 SP2 and up is using WMI.
http://msdn.microsoft.com/en-us/library/aa394582(VS.85).aspx
Win32_NetworkAdapter
http://msdn.microsoft.com/en-us/library/aa394216(VS.85).aspx
And you can use the namespace System.Net.NetworkInformation Jay mentioned. Here is a link about detecting what network cards are connected or disconnected:
http://felizk.dk/?p=43
If a machine has two NICs, how will you pick which one is the right one? The only way I've seen this done is giving the user a dropdown combo with each interface's IP address. See Wireshark for an example -
If there are other solutions, I'd like to hear them -
Check interface via:
Call GetIfEntry and look for a dwType of IF_TYPE_ETHERNET_CSMACD in the MIB_IFROW structure returned.
Or in .NET, look for a System.Net.NetworkInformation.NetworkInterface with a NetworkInterfaceType of Ethernet.
And check if the name contains the text, "Virtual".
---This seems like a lame way to check, but so far it's the only method I see to ignore those virtual 802.3 adapters.
I'm not sure of the answer - but be aware that it is possible to have multiple ethernet interfaces.