Windows error 0x0000030A, 778

Detailed Error Information

BADSTARTPOSITION^[1]

Message	The iterator's start position is invalid.
Declared in	winerror.h

This appears to be a raw Win32 error. More information may be available in error 0x8007030A.

HRESULT analysis^[2]

This is probably not the correct interpretation of this error. The Win32 error above is more likely to indicate the actual problem.

Flags	Severity	Success This code indicates success, rather than an error. This may not be the correct interpretation of this code, or possibly the program is handling errors incorrectly.
	Reserved (R)	false
	Origin	Microsoft
	NTSTATUS	false
	Reserved (X)	false
Facility	Code	0 (0x000)
	Name	FACILITY_NULL^[2]^[1]
	Description	The default facility code.^[2]^[1]
Error Code		778 (0x030a)

Questions

Placing a TAP-Windows device in TAP mode

I am using TAP-Windows (from the OpenVPN project) to create an interface as described here and here. I am basing my code of the example provided in the first article: const string UsermodeDeviceSpace = "\\\\.\\Global\\"; string devGuid = GetDeviceGuid(); IntPtr ptr= CreateFile(UsermodeDeviceSpace+devGuid+".tap", FileAccess.ReadWrite, FileShare.ReadWrite, 0, FileMode.Open, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, IntPtr.Zero); [...] read more

windows

network-programming

tun

tap windows set TUN MTU

I was trying to set up TUN-TAP device in Windows using this sample code (all driver already installed correctly): http://www.varsanofiev.com/inside/TunTest.cs IntPtr ptr = CreateFile(UsermodeDeviceSpace + this.devGuid + ".tap", FileAccess.ReadWrite, FileShare.ReadWrite, 0, FileMode.Open, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, IntPtr.Zero); int len; IntPtr pstatus = Marshal.AllocHGlobal(4); Marshal.WriteInt32(pstatus, 1); DeviceIoControl(ptr, TAP_CONTROL_CODE(6, METHOD_BUFFERED) /* TAP_IOCTL_SET_MEDIA_STATUS */, [...] read more

windows

adapter

tap

mtu

Comments

Sources

winerror.h from Windows SDK 10.0.14393.0
https://msdn.microsoft.com/en-us/library/cc231198.aspx

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