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238 lines
6.4 KiB
238 lines
6.4 KiB
/*++
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Copyright (c) 1998-2002 Microsoft Corporation
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Module Name:
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Control.c
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Abstract:
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User-mode interface to HTTP.SYS: Control Channel handler.
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Author:
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Keith Moore (keithmo) 15-Dec-1998
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Revision History:
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--*/
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#include "precomp.h"
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//
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// Private macros.
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//
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//
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// Private prototypes.
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//
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//
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// Public functions.
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//
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/***************************************************************************++
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Routine Description:
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Opens a control channel to HTTP.SYS.
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Arguments:
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pControlChannel - Receives a handle to the control channel if successful.
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Options - Supplies zero or more HTTP_OPTION_* flags.
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Return Value:
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ULONG - Completion status.
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--***************************************************************************/
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ULONG
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WINAPI
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HttpOpenControlChannel(
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OUT PHANDLE pControlChannel,
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IN ULONG Options
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)
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{
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NTSTATUS status;
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//
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// First, just try to open the driver.
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//
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status = HttpApiOpenDriverHelper(
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pControlChannel, // pHandle
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NULL,
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0,
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NULL,
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0,
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NULL,
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0,
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GENERIC_READ | // DesiredAccess
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GENERIC_WRITE |
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SYNCHRONIZE,
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HttpApiControlChannelHandleType, // handle type
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NULL, // pObjectName
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Options, // Options
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FILE_OPEN, // CreateDisposition
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NULL // pSecurityAttributes
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);
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//
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// If we couldn't open the driver because it's not running, then try
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// to start the driver & retry the open.
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//
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if (status == STATUS_OBJECT_NAME_NOT_FOUND ||
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status == STATUS_OBJECT_PATH_NOT_FOUND)
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{
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if (HttpApiTryToStartDriver(HTTP_SERVICE_NAME))
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{
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status = HttpApiOpenDriverHelper(
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pControlChannel, // pHandle
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NULL,
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0,
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NULL,
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0,
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NULL,
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0,
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GENERIC_READ | // DesiredAccess
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GENERIC_WRITE |
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SYNCHRONIZE,
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HttpApiControlChannelHandleType, // handle type
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NULL, // pObjectName
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Options, // Options
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FILE_OPEN, // CreateDisposition
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NULL // pSecurityAttributes
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);
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}
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}
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return HttpApiNtStatusToWin32Status( status );
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} // HttpOpenControlChannel
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/***************************************************************************++
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Routine Description:
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Queries information from a control channel.
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Arguments:
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ControlChannelHandle - Supplies a HTTP.SYS control channel handle.
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InformationClass - Supplies the type of information to query.
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pControlChannelInformation - Supplies a buffer for the query.
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Length - Supplies the length of pControlChannelInformation.
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pReturnLength - Receives the length of data written to the buffer.
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Return Value:
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ULONG - Completion status.
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--***************************************************************************/
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ULONG
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WINAPI
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HttpQueryControlChannelInformation(
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IN HANDLE ControlChannelHandle,
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IN HTTP_CONTROL_CHANNEL_INFORMATION_CLASS InformationClass,
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OUT PVOID pControlChannelInformation,
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IN ULONG Length,
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OUT PULONG pReturnLength OPTIONAL
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)
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{
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HTTP_CONTROL_CHANNEL_INFO channelInfo;
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//
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// Initialize the input structure.
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//
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channelInfo.InformationClass = InformationClass;
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//
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// Make the request.
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//
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return HttpApiSynchronousDeviceControl(
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ControlChannelHandle, // FileHandle
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IOCTL_HTTP_QUERY_CONTROL_CHANNEL, // IoControlCode
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&channelInfo, // pInputBuffer
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sizeof(channelInfo), // InputBufferLength
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pControlChannelInformation, // pOutputBuffer
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Length, // OutputBufferLength
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pReturnLength // pBytesTransferred
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);
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} // HttpQueryControlChannelInformation
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/***************************************************************************++
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Routine Description:
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Sets information in a control channel.
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Arguments:
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ControlChannelHandle - Supplies a HTTP.SYS control channel handle.
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InformationClass - Supplies the type of information to set.
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pControlChannelInformation - Supplies the data to set.
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Length - Supplies the length of pControlChannelInformation.
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Return Value:
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ULONG - Completion status.
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--***************************************************************************/
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ULONG
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WINAPI
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HttpSetControlChannelInformation(
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IN HANDLE ControlChannelHandle,
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IN HTTP_CONTROL_CHANNEL_INFORMATION_CLASS InformationClass,
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IN PVOID pControlChannelInformation,
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IN ULONG Length
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)
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{
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HTTP_CONTROL_CHANNEL_INFO channelInfo;
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//
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// Initialize the input structure.
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//
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channelInfo.InformationClass = InformationClass;
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//
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// Make the request.
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//
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return HttpApiSynchronousDeviceControl(
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ControlChannelHandle, // FileHandle
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IOCTL_HTTP_SET_CONTROL_CHANNEL, // IoControlCode
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&channelInfo, // pInputBuffer
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sizeof(channelInfo), // InputBufferLength
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pControlChannelInformation, // pOutputBuffer
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Length, // OutputBufferLength
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NULL // pBytesTransferred
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);
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} // HttpSetControlChannelInformation
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//
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// Private functions.
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//
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