Hesham/wintun
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Assert that adapter is always running when client is registering rings

Browse Source 
By attaching to NDIS device instead of creating our own device for I/O,
the adapter is always running before client is able to connect and
register rings. NDIS also won't allow adapter to pause with connected
clients.

Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2019-07-22 11:13:20 +02:00 committed by Jason A. Donenfeld
parent 7f49a66494
commit 999a6744db
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
wintun.c
View File

@ -606,6 +606,8 @@ TunRegisterBuffers(_Inout_ TUN_CTX *Ctx, _Inout_ IRP *Irp)
if (InterlockedCompareExchangePointer(&Ctx->Device.Owner, Stack->FileObject, NULL) != NULL)
return STATUS_ALREADY_INITIALIZED;
ASSERT(InterlockedGet(&Ctx->Flags) & TUN_FLAGS_RUNNING);
TUN_REGISTER_RINGS *Rrb = Irp->AssociatedIrp.SystemBuffer;
if (Status = STATUS_INVALID_PARAMETER, Stack->Parameters.DeviceIoControl.InputBufferLength != sizeof(*Rrb))
goto cleanupResetOwner;