/*
* --------------------------------------------------------------------------
* This function allocated the switch context, and initializes its necessary
* members.
* --------------------------------------------------------------------------
*/
NDIS_STATUS
OvsCreateSwitch(NDIS_HANDLE ndisFilterHandle,
POVS_SWITCH_CONTEXT *switchContextOut)
{
NDIS_STATUS status;
POVS_SWITCH_CONTEXT switchContext;
NDIS_SWITCH_CONTEXT hostSwitchContext;
NDIS_SWITCH_OPTIONAL_HANDLERS hostSwitchHandler;
OVS_LOG_TRACE("Enter: Create switch object");
switchContext = (POVS_SWITCH_CONTEXT) OvsAllocateMemoryWithTag(
sizeof(OVS_SWITCH_CONTEXT), OVS_SWITCH_POOL_TAG);
if (switchContext == NULL) {
status = NDIS_STATUS_RESOURCES;
goto create_switch_done;
}
RtlZeroMemory(switchContext, sizeof(OVS_SWITCH_CONTEXT));
/* Initialize the switch. */
hostSwitchHandler.Header.Type = NDIS_OBJECT_TYPE_SWITCH_OPTIONAL_HANDLERS;
hostSwitchHandler.Header.Size = NDIS_SIZEOF_SWITCH_OPTIONAL_HANDLERS_REVISION_1;
hostSwitchHandler.Header.Revision = NDIS_SWITCH_OPTIONAL_HANDLERS_REVISION_1;
status = NdisFGetOptionalSwitchHandlers(ndisFilterHandle,
&hostSwitchContext,
&hostSwitchHandler);
if (status != NDIS_STATUS_SUCCESS) {
OVS_LOG_ERROR("OvsExtAttach: Extension is running in "
"non-switch environment.");
OvsFreeMemoryWithTag(switchContext, OVS_SWITCH_POOL_TAG);
goto create_switch_done;
}
switchContext->NdisFilterHandle = ndisFilterHandle;
switchContext->NdisSwitchContext = hostSwitchContext;
RtlCopyMemory(&switchContext->NdisSwitchHandlers, &hostSwitchHandler,
sizeof(NDIS_SWITCH_OPTIONAL_HANDLERS));
status = OvsInitSwitchContext(switchContext);
if (status != NDIS_STATUS_SUCCESS) {
OvsFreeMemoryWithTag(switchContext, OVS_SWITCH_POOL_TAG);
switchContext = NULL;
goto create_switch_done;
}
status = OvsInitTunnelFilter(gOvsExtDriverObject, gOvsDeviceObject);
if (status != NDIS_STATUS_SUCCESS) {
OvsUninitSwitchContext(switchContext);
goto create_switch_done;
}
*switchContextOut = switchContext;
create_switch_done:
OVS_LOG_TRACE("Exit: switchContext: %p status: %#lx",
switchContext, status);
return status;
}
//
// FilterAttach Function
// http://msdn.microsoft.com/en-us/library/ff549905(v=VS.85).aspx
//
_Use_decl_annotations_
NDIS_STATUS
SxNdisAttach(
NDIS_HANDLE NdisFilterHandle,
NDIS_HANDLE SxDriverContext,
PNDIS_FILTER_ATTACH_PARAMETERS AttachParameters
)
{
NDIS_STATUS status;
NDIS_FILTER_ATTRIBUTES sxAttributes;
ULONG switchObjectSize;
NDIS_SWITCH_CONTEXT switchContext;
NDIS_SWITCH_OPTIONAL_HANDLERS switchHandler;
PSX_SWITCH_OBJECT switchObject;
UNREFERENCED_PARAMETER(SxDriverContext);
DEBUGP(DL_TRACE, ("===>SxAttach: NdisFilterHandle %p\n", NdisFilterHandle));
status = NDIS_STATUS_SUCCESS;
switchObject = NULL;
NT_ASSERT(SxDriverContext == (NDIS_HANDLE)SxDriverObject);
if (AttachParameters->MiniportMediaType != NdisMedium802_3)
{
status = NDIS_STATUS_INVALID_PARAMETER;
goto Cleanup;
}
switchHandler.Header.Type = NDIS_OBJECT_TYPE_SWITCH_OPTIONAL_HANDLERS;
switchHandler.Header.Size = NDIS_SIZEOF_SWITCH_OPTIONAL_HANDLERS_REVISION_1;
switchHandler.Header.Revision = NDIS_SWITCH_OPTIONAL_HANDLERS_REVISION_1;
status = NdisFGetOptionalSwitchHandlers(NdisFilterHandle,
&switchContext,
&switchHandler);
if (status != NDIS_STATUS_SUCCESS)
{
DEBUGP(DL_ERROR,
("SxAttach: Extension is running in non-switch environment.\n"));
goto Cleanup;
}
switchObjectSize = sizeof(SX_SWITCH_OBJECT);
switchObject = ExAllocatePoolWithTag(NonPagedPoolNx,
switchObjectSize,
SxExtAllocationTag);
if (switchObject == NULL)
{
status = NDIS_STATUS_RESOURCES;
goto Cleanup;
}
RtlZeroMemory(switchObject, switchObjectSize);
//
// Initialize NDIS related information.
//
switchObject->NdisFilterHandle = NdisFilterHandle;
switchObject->NdisSwitchContext = switchContext;
RtlCopyMemory(&switchObject->NdisSwitchHandlers,
&switchHandler,
sizeof(NDIS_SWITCH_OPTIONAL_HANDLERS));
//
// Let the extension create its own context.
//
status = SxExtCreateSwitch(switchObject,
&(switchObject->ExtensionContext));
if (status != NDIS_STATUS_SUCCESS)
{
goto Cleanup;
}
//
// Register the object with NDIS because NDIS passes this object when it
// calls into the driver.
//
NdisZeroMemory(&sxAttributes, sizeof(NDIS_FILTER_ATTRIBUTES));
sxAttributes.Header.Revision = NDIS_FILTER_ATTRIBUTES_REVISION_1;
sxAttributes.Header.Size = sizeof(NDIS_FILTER_ATTRIBUTES);
sxAttributes.Header.Type = NDIS_OBJECT_TYPE_FILTER_ATTRIBUTES;
sxAttributes.Flags = 0;
NDIS_DECLARE_FILTER_MODULE_CONTEXT(SX_SWITCH_OBJECT);
status = NdisFSetAttributes(NdisFilterHandle, switchObject, &sxAttributes);
if (status != NDIS_STATUS_SUCCESS)
{
DEBUGP(DL_ERROR, ("SxBase: Failed to set attributes.\n"));
goto Cleanup;
}
switchObject->ControlFlowState = SxSwitchAttached;
switchObject->DataFlowState = SxSwitchPaused;
NdisAcquireSpinLock(&SxExtensionListLock);
InsertHeadList(&SxExtensionList, &switchObject->Link);
NdisReleaseSpinLock(&SxExtensionListLock);
Cleanup:
if (status != NDIS_STATUS_SUCCESS)
{
if (switchObject != NULL)
{
ExFreePool(switchObject);
}
}
DEBUGP(DL_TRACE, ("<===SxAttach: status %x\n", status));
return status;
}
