/// <summary>
/// Determine whether the specified service is configured to trigger start
/// </summary>
/// <param name="hService">
/// A handle to the service. This handle is returned by the OpenService or
/// CreateService function and must have the SERVICE_QUERY_CONFIG access right.
/// </param>
/// <returns></returns>
public static bool IsTriggerStartService(SafeServiceHandle hService)
{
// Query the service trigger info size of the current serivce
int cbBytesNeeded = -1;
NativeMethods.QueryServiceConfig2(hService,
ServiceConfig2InfoLevel.SERVICE_CONFIG_TRIGGER_INFO, IntPtr.Zero, 0,
out cbBytesNeeded);
if (cbBytesNeeded == -1)
{
// If failed, get the last Win32 error and throw a Win32Exception
throw new Win32Exception();
}
// Allocate memory for the service trigger info struct
IntPtr pBuffer = Marshal.AllocHGlobal(cbBytesNeeded);
try
{
// Retrieve the service trigger info
if (!NativeMethods.QueryServiceConfig2(hService,
ServiceConfig2InfoLevel.SERVICE_CONFIG_TRIGGER_INFO, pBuffer,
cbBytesNeeded, out cbBytesNeeded))
{
// If failed, get the last Win32 error and throw a Win32Exception
throw new Win32Exception();
}
SERVICE_TRIGGER_INFO sti = (SERVICE_TRIGGER_INFO)
Marshal.PtrToStructure(pBuffer, typeof(SERVICE_TRIGGER_INFO));
// You can also retrieve more trigger information of the service
//for (int i = 0; i < sti.cTriggers; i++)
//{
// // Calculate the address of the SERVICE_TRIGGER struct
// IntPtr pst = new IntPtr((long)sti.pTriggers +
// i * Marshal.SizeOf(typeof(SERVICE_TRIGGER)));
//
// // Marshal the native SERVICE_TRIGGER struct to .NET struct
// SERVICE_TRIGGER st = (SERVICE_TRIGGER)Marshal.PtrToStructure(pst,
// typeof(SERVICE_TRIGGER));
//
// // Get more information from the SERVICE_TRIGGER struct
// // ...
//}
return(sti.cTriggers > 0);
}
finally
{
// Free the memory of the service trigger info struct
if (pBuffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(pBuffer);
}
}
}
/// <summary>
/// Set the service to trigger-start when the first IP address on the TCP/IP
/// networking stack becomes available, and trigger-stop when the last IP
/// address on the TCP/IP networking stack becomes unavailable.
/// </summary>
/// <param name="hService">
/// A handle to the service. This handle is returned by the OpenService or
/// CreateService function and must have the SERVICE_CHANGE_CONFIG access right.
/// </param>
public static void SetServiceTriggerStartOnIPAddressArrival(SafeServiceHandle hService)
{
IntPtr pGuidIpAddressArrival = IntPtr.Zero;
IntPtr pGuidIpAddressRemoval = IntPtr.Zero;
IntPtr pServiceTriggers = IntPtr.Zero;
IntPtr pServiceTriggerInfo = IntPtr.Zero;
try
{
// Marshal Guid struct NETWORK_MANAGER_FIRST_IP_ADDRESS_ARRIVAL_GUID
// and NETWORK_MANAGER_LAST_IP_ADDRESS_REMOVAL_GUID to native memory
int cbGuid = Marshal.SizeOf(typeof(Guid));
pGuidIpAddressArrival = Marshal.AllocHGlobal(cbGuid);
Marshal.StructureToPtr(NETWORK_MANAGER_FIRST_IP_ADDRESS_ARRIVAL_GUID,
pGuidIpAddressArrival, false);
pGuidIpAddressRemoval = Marshal.AllocHGlobal(cbGuid);
Marshal.StructureToPtr(NETWORK_MANAGER_LAST_IP_ADDRESS_REMOVAL_GUID,
pGuidIpAddressRemoval, false);
// Allocate and set the SERVICE_TRIGGER structure for
// NETWORK_MANAGER_FIRST_IP_ADDRESS_ARRIVAL_GUID to start the service
SERVICE_TRIGGER serviceTrigger1 = new SERVICE_TRIGGER();
serviceTrigger1.dwTriggerType =
ServiceTriggerType.SERVICE_TRIGGER_TYPE_IP_ADDRESS_AVAILABILITY;
serviceTrigger1.dwAction =
ServiceTriggerAction.SERVICE_TRIGGER_ACTION_SERVICE_START;
serviceTrigger1.pTriggerSubtype = pGuidIpAddressArrival;
// Allocate and set the SERVICE_TRIGGER structure for
// NETWORK_MANAGER_LAST_IP_ADDRESS_REMOVAL_GUID to stop the service
SERVICE_TRIGGER serviceTrigger2 = new SERVICE_TRIGGER();
serviceTrigger2.dwTriggerType =
ServiceTriggerType.SERVICE_TRIGGER_TYPE_IP_ADDRESS_AVAILABILITY;
serviceTrigger2.dwAction =
ServiceTriggerAction.SERVICE_TRIGGER_ACTION_SERVICE_STOP;
serviceTrigger2.pTriggerSubtype = pGuidIpAddressRemoval;
// Marshal the 2 SERVICE_TRIGGER structs to native memory as an array
int cbServiceTrigger = Marshal.SizeOf(typeof(SERVICE_TRIGGER));
pServiceTriggers = Marshal.AllocHGlobal(cbServiceTrigger * 2);
Marshal.StructureToPtr(serviceTrigger1, pServiceTriggers, false);
Marshal.StructureToPtr(serviceTrigger2,
new IntPtr((long)pServiceTriggers + cbServiceTrigger), false);
// Allocate and set the SERVICE_TRIGGER_INFO structure
SERVICE_TRIGGER_INFO serviceTriggerInfo = new SERVICE_TRIGGER_INFO();
serviceTriggerInfo.cTriggers = 2;
serviceTriggerInfo.pTriggers = pServiceTriggers;
// Marshal the SERVICE_TRIGGER_INFO struct to native memory
int cbServiceTriggerInfo = Marshal.SizeOf(typeof(SERVICE_TRIGGER_INFO));
pServiceTriggerInfo = Marshal.AllocHGlobal(cbServiceTriggerInfo);
Marshal.StructureToPtr(serviceTriggerInfo, pServiceTriggerInfo, false);
// Call ChangeServiceConfig2 with the SERVICE_CONFIG_TRIGGER_INFO level
// and pass to it the address of the SERVICE_TRIGGER_INFO structure
if (!NativeMethods.ChangeServiceConfig2(hService,
ServiceConfig2InfoLevel.SERVICE_CONFIG_TRIGGER_INFO,
pServiceTriggerInfo))
{
// If the handle is invalid, get the last Win32 error and throw a
// Win32Exception
throw new Win32Exception();
}
}
finally
{
// Clean up the native memory
if (pGuidIpAddressArrival != IntPtr.Zero)
{
Marshal.FreeHGlobal(pGuidIpAddressArrival);
}
if (pGuidIpAddressRemoval != IntPtr.Zero)
{
Marshal.FreeHGlobal(pGuidIpAddressRemoval);
}
if (pServiceTriggers != IntPtr.Zero)
{
Marshal.FreeHGlobal(pServiceTriggers);
}
if (pServiceTriggerInfo != IntPtr.Zero)
{
Marshal.FreeHGlobal(pServiceTriggerInfo);
}
}
}
/// <summary>
/// Set the service to trigger-start when a generic USB disk becomes available.
/// </summary>
/// <param name="hService">
/// A handle to the service. This handle is returned by the OpenService or
/// CreateService function and must have the SERVICE_CHANGE_CONFIG access right.
/// </param>
public static void SetServiceTriggerStartOnUSBArrival(SafeServiceHandle hService)
{
IntPtr pGuidUSBDevice = IntPtr.Zero;
IntPtr pUSBHardwareId = IntPtr.Zero;
IntPtr pDeviceData = IntPtr.Zero;
IntPtr pServiceTrigger = IntPtr.Zero;
IntPtr pServiceTriggerInfo = IntPtr.Zero;
try
{
// Marshal the Guid struct GUID_DEVINTERFACE_DISK to native memory
pGuidUSBDevice = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(Guid)));
Marshal.StructureToPtr(GUID_DEVINTERFACE_DISK, pGuidUSBDevice, false);
// Allocate and set the SERVICE_TRIGGER_SPECIFIC_DATA_ITEM structure
SERVICE_TRIGGER_SPECIFIC_DATA_ITEM deviceData;
deviceData.dwDataType =
ServiceTriggerDataType.SERVICE_TRIGGER_DATA_TYPE_STRING;
deviceData.cbData = (uint)(USBHardwareId.Length + 1) * 2;
pUSBHardwareId = Marshal.StringToHGlobalUni(USBHardwareId);
deviceData.pData = pUSBHardwareId;
// Marshal SERVICE_TRIGGER_SPECIFIC_DATA_ITEM to native memory
int cbDataItem = Marshal.SizeOf(typeof(SERVICE_TRIGGER_SPECIFIC_DATA_ITEM));
pDeviceData = Marshal.AllocHGlobal(cbDataItem);
Marshal.StructureToPtr(deviceData, pDeviceData, false);
// Allocate and set the SERVICE_TRIGGER structure
SERVICE_TRIGGER serviceTrigger = new SERVICE_TRIGGER();
serviceTrigger.dwTriggerType =
ServiceTriggerType.SERVICE_TRIGGER_TYPE_DEVICE_INTERFACE_ARRIVAL;
serviceTrigger.dwAction =
ServiceTriggerAction.SERVICE_TRIGGER_ACTION_SERVICE_START;
serviceTrigger.pTriggerSubtype = pGuidUSBDevice;
serviceTrigger.cDataItems = 1;
serviceTrigger.pDataItems = pDeviceData;
// Marshal the SERVICE_TRIGGER struct to native memory
int cbServiceTrigger = Marshal.SizeOf(typeof(SERVICE_TRIGGER));
pServiceTrigger = Marshal.AllocHGlobal(cbServiceTrigger);
Marshal.StructureToPtr(serviceTrigger, pServiceTrigger, false);
// Allocate and set the SERVICE_TRIGGER_INFO structure
SERVICE_TRIGGER_INFO serviceTriggerInfo = new SERVICE_TRIGGER_INFO();
serviceTriggerInfo.cTriggers = 1;
serviceTriggerInfo.pTriggers = pServiceTrigger;
// Marshal the SERVICE_TRIGGER_INFO struct to native memory
int cbServiceTriggerInfo = Marshal.SizeOf(typeof(SERVICE_TRIGGER_INFO));
pServiceTriggerInfo = Marshal.AllocHGlobal(cbServiceTriggerInfo);
Marshal.StructureToPtr(serviceTriggerInfo, pServiceTriggerInfo, false);
// Call ChangeServiceConfig2 with the SERVICE_CONFIG_TRIGGER_INFO level
// and pass to it the address of the SERVICE_TRIGGER_INFO structure
if (!NativeMethods.ChangeServiceConfig2(hService,
ServiceConfig2InfoLevel.SERVICE_CONFIG_TRIGGER_INFO,
pServiceTriggerInfo))
{
// If the handle is invalid, get the last Win32 error and throw a
// Win32Exception
throw new Win32Exception();
}
}
finally
{
// Clean up the native memory
if (pGuidUSBDevice != IntPtr.Zero)
{
Marshal.FreeHGlobal(pGuidUSBDevice);
}
if (pUSBHardwareId != IntPtr.Zero)
{
Marshal.FreeHGlobal(pUSBHardwareId);
}
if (pDeviceData != IntPtr.Zero)
{
Marshal.FreeHGlobal(pDeviceData);
}
if (pServiceTrigger != IntPtr.Zero)
{
Marshal.FreeHGlobal(pServiceTrigger);
}
if (pServiceTriggerInfo != IntPtr.Zero)
{
Marshal.FreeHGlobal(pServiceTriggerInfo);
}
}
}
