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/*++
Copyright (c) Microsoft Corporation. All rights reserved.
Module Name:
fixhandler.cpp
Abstract:
This file contains the Fix handler and contains logic to provide position.
Environment:
Windows User-Mode Driver Framework
--*/
#include "precomp.h"
#include "Trace.h"
#include "Defaults.h"
#include "FixSession.h"
#include "FixHandler.h"
#include "FixHandler.tmh"
NTSTATUS
CFixHandler::Initialize(
_In_ WDFQUEUE Queue
)
{
NTSTATUS status = STATUS_SUCCESS;
status = _SingleShotSession.Initialize(Queue);
return status;
}
NTSTATUS
CFixHandler::StartFix(
_In_ WDFREQUEST Request,
_In_ BOOL LocationServiceEnabled
)
{
NTSTATUS status = STATUS_SUCCESS;
PGNSS_FIXSESSION_PARAM fixSessionParameters = nullptr;
// For privacy reasons, the location stack notifies the driver when user toggles the location device controls.
// When set to off, the driver must not entertain any new location sessions.
if (!LocationServiceEnabled)
{
status = STATUS_UNSUCCESSFUL;
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "Location master switch is off, we do not start a fix session");
goto Exit;
}
status = WdfRequestRetrieveInputBuffer(Request, sizeof(GNSS_FIXSESSION_PARAM), (void**)&fixSessionParameters, nullptr);
if (!NT_SUCCESS(status))
{
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "WdfRequestRetrieveInputBuffer failed with %!STATUS!", status);
goto Exit;
}
//
// FIX ME:
// This sample currently supports only single shot session fix.
// If you support another session type, e.g., distance tracking, update the logic below accordingly.
//
if (fixSessionParameters->SessionType != GNSS_FixSession_SingleShot)
{
status = STATUS_UNSUCCESSFUL;
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "Session type is not GNSS_FixSession_SingleShot");
goto Exit;
}
_CurrentSinglsShotSessionId = fixSessionParameters->FixSessionID;
status = _SingleShotSession.StartAcquiringFix(fixSessionParameters);
if (!NT_SUCCESS(status))
{
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "StartFix failed with %!STATUS!", status);
goto Exit;
}
Exit:
return status;
}
NTSTATUS
CFixHandler::StopFix(
_In_ WDFREQUEST Request
)
{
NTSTATUS status = STATUS_SUCCESS;
PGNSS_STOPFIXSESSION_PARAM stopFixSessionParam = nullptr;
status = WdfRequestRetrieveInputBuffer(Request, sizeof(GNSS_STOPFIXSESSION_PARAM), (void**)&stopFixSessionParam, nullptr);
if (!NT_SUCCESS(status))
{
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "WdfRequestRetrieveInputBuffer failed with %!STATUS!", status);
goto Exit;
}
// Send the session parameters to the right session based on the ID
if (stopFixSessionParam->FixSessionID != _CurrentSinglsShotSessionId)
{
status = STATUS_UNSUCCESSFUL;
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "Session type is not GNSS_FixSession_SingleShot");
goto Exit;
}
_CurrentSinglsShotSessionId = INVALID_SESSION_ID;
status = _SingleShotSession.StopAcquiringFix(stopFixSessionParam);
if (!NT_SUCCESS(status))
{
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "StopFix failed with %!STATUS!", status);
goto Exit;
}
Exit:
return status;
}
NTSTATUS
CFixHandler::StopExistingSinglsShotFix()
{
NTSTATUS status = STATUS_SUCCESS;
PGNSS_STOPFIXSESSION_PARAM stopFixSessionParam = nullptr;
if (_CurrentSinglsShotSessionId == INVALID_SESSION_ID)
{
TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_FIX, "There is no single shot session to stop");
goto Exit;
}
_CurrentSinglsShotSessionId = INVALID_SESSION_ID;
INIT_POD_GNSS_STRUCT(stopFixSessionParam);
status = _SingleShotSession.StopAcquiringFix(stopFixSessionParam);
if (!NT_SUCCESS(status))
{
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "StopFix failed with %!STATUS!", status);
goto Exit;
}
Exit:
return status;
}
NTSTATUS
CFixHandler::ModifyFix(
_In_ WDFREQUEST Request
)
{
NTSTATUS status = STATUS_SUCCESS;
PGNSS_FIXSESSION_PARAM fixSessionParameters = nullptr;
status = WdfRequestRetrieveInputBuffer(Request, sizeof(GNSS_FIXSESSION_PARAM), (void**)&fixSessionParameters, nullptr);
if (!NT_SUCCESS(status))
{
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "WdfRequestRetrieveInputBuffer failed with %!STATUS!", status);
goto Exit;
}
//
// FIX ME:
// We currently support only single shot session fix.
// If you support another session type, e.g., distance tracking, update the logic below accordingly.
//
if (fixSessionParameters->SessionType != GNSS_FixSession_SingleShot)
{
status = STATUS_UNSUCCESSFUL;
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "Session type is not GNSS_FixSession_SingleShot");
goto Exit;
}
//
// FIX ME:
// Since only single session is supported, use _SingleShotSession instance.
// If multiple sessions, get the right session pointer searched by the session ID.
//
_SingleShotSession.ModifyAcquiringFix(fixSessionParameters);
if (!NT_SUCCESS(status))
{
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "ModifyFix failed with %!STATUS!", status);
goto Exit;
}
Exit:
return status;
}
NTSTATUS
CFixHandler::GetFixRequest(
_In_ WDFREQUEST Request
)
{
NTSTATUS status = STATUS_SUCCESS;
ULONG sessionId = INVALID_SESSION_ID;
ULONG *pSessionId = nullptr;
// Get the session ID this get fix is for
status = WdfRequestRetrieveInputBuffer(Request, sizeof(sessionId), (void**)&pSessionId, nullptr);
if (!NT_SUCCESS(status))
{
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "Could not retrieve input sessionID for request");
goto Exit;
}
//
// FIX ME:
// Single session is only option now, but if multiple sessions, this sample should do this check at the FixHandler Level.
//
sessionId = *pSessionId;
status = _SingleShotSession.GetFix(Request);
if (!NT_SUCCESS(status))
{
TraceEvents(TRACE_LEVEL_ERROR, TRACE_FIX, "SinglShotSession.GetFix failed with %!STATUS!", status);
goto Exit;
}
Exit:
return status;
}
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