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333 lines
7.6 KiB
333 lines
7.6 KiB
/*******************************************************************/
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/* Copyright(c) 1993 Microsoft Corporation */
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/*******************************************************************/
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//***
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//
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// Filename: browser.c
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//
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// Description: implements the functions to enable/restore browser
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// on IPX ras lines
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//
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// Author: Stefan Solomon (stefans) September 1, 1994.
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//
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// Revision History:
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//
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//***
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#include "precomp.h"
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#pragma hdrstop
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#include <ntddbrow.h>
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NTSTATUS
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OpenBrowser(
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OUT PHANDLE BrowserHandle
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);
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NTSTATUS
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BrDgReceiverIoControl(
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IN HANDLE FileHandle,
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IN ULONG DgReceiverControlCode,
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IN PLMDR_REQUEST_PACKET Drp,
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IN ULONG DrpSize,
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IN PVOID SecondBuffer OPTIONAL,
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IN ULONG SecondBufferLength,
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OUT PULONG Information OPTIONAL
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);
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VOID
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EnableDisableTransport(
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IN PCHAR Transport,
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BOOL Disable,
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BOOL *Previous
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);
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//***
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//
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// Function: DisableRestoreBrowserOverIpx
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//
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// Arguments:
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// contextp - context pointer
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// Disable - TRUE - disable, FALSE - restore previous state
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//
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//***
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VOID
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DisableRestoreBrowserOverIpx(PIPXCP_CONTEXT contextp,
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BOOL Disable)
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{
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PCHAR Transport = "\\Device\\NwLnkIpx";
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EnableDisableTransport(Transport,
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Disable,
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&contextp->NwLnkIpxPreviouslyEnabled);
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}
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//***
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//
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// Function: DisableRestoreBrowserOverNetbiosIpx
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//
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// Arguments:
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// contextp - context pointer
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// Disable - TRUE - disable, FALSE - restore previous state
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//
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//***
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VOID
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DisableRestoreBrowserOverNetbiosIpx(PIPXCP_CONTEXT contextp,
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BOOL Disable)
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{
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PCHAR Transport = "\\Device\\NwLnkNb";
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EnableDisableTransport(Transport,
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Disable,
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&contextp->NwLnkNbPreviouslyEnabled);
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}
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VOID
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EnableDisableTransport(
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IN PCHAR Transport,
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BOOL Disable,
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BOOL *Previous
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)
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{
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NTSTATUS Status;
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UNICODE_STRING TransportName;
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ANSI_STRING ATransportName;
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HANDLE BrowserHandle;
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PLMDR_REQUEST_PACKET RequestPacket = NULL;
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RtlInitString(&ATransportName, Transport);
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if ( RtlAnsiStringToUnicodeString(&TransportName, &ATransportName, TRUE)
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!= STATUS_SUCCESS )
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{
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return;
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}
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RequestPacket = (PLMDR_REQUEST_PACKET)LocalAlloc(0, sizeof(LMDR_REQUEST_PACKET) + TransportName.MaximumLength);
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if (RequestPacket == NULL)
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{
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RtlFreeUnicodeString(&TransportName);
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return;
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}
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RequestPacket->TransportName.Buffer = (PWSTR)((PCHAR)RequestPacket + sizeof(LMDR_REQUEST_PACKET) );
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RequestPacket->TransportName.MaximumLength = TransportName.MaximumLength;
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RtlCopyUnicodeString(&RequestPacket->TransportName, &TransportName);
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Status = OpenBrowser(&BrowserHandle);
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if (!NT_SUCCESS(Status))
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{
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SS_PRINT(("EnableDisableTransport: Failed to open browser, status %x\n",
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Status));
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LocalFree(RequestPacket);
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RtlFreeUnicodeString(&TransportName);
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return;
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}
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SS_PRINT(("EnableDisableTransport: Browser opened succesfully!\n"));
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RequestPacket->Version = LMDR_REQUEST_PACKET_VERSION;
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if(Disable)
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{
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// request to disable
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RequestPacket->Parameters.EnableDisableTransport.EnableTransport = FALSE;
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}
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else
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{
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// request to restore
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RequestPacket->Parameters.EnableDisableTransport.EnableTransport = *Previous;
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}
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// IOCTl the Browser
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Status = BrDgReceiverIoControl(BrowserHandle,
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IOCTL_LMDR_ENABLE_DISABLE_TRANSPORT,
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RequestPacket,
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sizeof(LMDR_REQUEST_PACKET)+TransportName.MaximumLength,
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RequestPacket,
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sizeof(LMDR_REQUEST_PACKET)+TransportName.MaximumLength,
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NULL);
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if (!NT_SUCCESS(Status))
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{
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SS_PRINT(("EnableDisableTransport: Failed to IOCtl browser, status %x\n",
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Status));
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RtlFreeUnicodeString(&TransportName);
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CloseHandle(BrowserHandle);
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LocalFree(RequestPacket);
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return;
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}
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SS_PRINT(("Browser IOCTled Ok, EnableTransport %x PreviouslyEnabled %x\n",
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RequestPacket->Parameters.EnableDisableTransport.EnableTransport,
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RequestPacket->Parameters.EnableDisableTransport.PreviouslyEnabled));
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// save the previous if disable requested
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if(Disable)
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{
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*Previous = RequestPacket->Parameters.EnableDisableTransport.PreviouslyEnabled;
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}
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RtlFreeUnicodeString(&TransportName);
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CloseHandle(BrowserHandle);
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LocalFree(RequestPacket);
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}
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NTSTATUS
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OpenBrowser(
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OUT PHANDLE BrowserHandle
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)
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/*++
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Routine Description:
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This function opens a handle to the bowser device driver.
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Arguments:
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OUT PHANDLE BrowserHandle - Returns the handle to the browser.
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Return Value:
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Succes or reason for failure.
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--*/
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{
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NTSTATUS ntstatus;
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UNICODE_STRING DeviceName;
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IO_STATUS_BLOCK IoStatusBlock;
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OBJECT_ATTRIBUTES ObjectAttributes;
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//
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// Open the redirector device.
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//
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RtlInitUnicodeString(&DeviceName, DD_BROWSER_DEVICE_NAME_U);
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InitializeObjectAttributes(
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&ObjectAttributes,
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&DeviceName,
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OBJ_CASE_INSENSITIVE,
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NULL,
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NULL
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);
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ntstatus = NtOpenFile(
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BrowserHandle,
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SYNCHRONIZE | GENERIC_READ | GENERIC_WRITE,
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&ObjectAttributes,
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&IoStatusBlock,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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FILE_SYNCHRONOUS_IO_NONALERT
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);
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if (NT_SUCCESS(ntstatus)) {
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ntstatus = IoStatusBlock.Status;
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}
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return ntstatus;
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}
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NTSTATUS
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BrDgReceiverIoControl(
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IN HANDLE FileHandle,
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IN ULONG DgReceiverControlCode,
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IN PLMDR_REQUEST_PACKET Drp,
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IN ULONG DrpSize,
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IN PVOID SecondBuffer OPTIONAL,
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IN ULONG SecondBufferLength,
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OUT PULONG Information OPTIONAL
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)
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/*++
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Routine Description:
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Arguments:
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FileHandle - Supplies a handle to the file or device on which the service
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is being performed.
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DgReceiverControlCode - Supplies the NtDeviceIoControlFile function code
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given to the datagram receiver.
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Drp - Supplies the datagram receiver request packet.
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DrpSize - Supplies the length of the datagram receiver request packet.
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SecondBuffer - Supplies the second buffer in call to NtDeviceIoControlFile.
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SecondBufferLength - Supplies the length of the second buffer.
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Information - Returns the information field of the I/O status block.
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Return Value:
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Success or reason for failure.
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--*/
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{
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NTSTATUS ntstatus;
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IO_STATUS_BLOCK IoStatusBlock;
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HANDLE CompletionEvent;
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SS_PRINT(("TransportName.MaximumLength %d\n", Drp->TransportName.MaximumLength));
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CompletionEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
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if (CompletionEvent == NULL) {
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return(GetLastError());
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}
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//
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// Send the request to the Datagram Receiver DD.
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//
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ntstatus = NtDeviceIoControlFile(
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FileHandle,
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CompletionEvent,
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NULL,
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NULL,
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&IoStatusBlock,
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DgReceiverControlCode,
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Drp,
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DrpSize,
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Drp,
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DrpSize
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);
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if (NT_SUCCESS(ntstatus)) {
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//
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// If pending was returned, then wait until the request completes.
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//
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if (ntstatus == STATUS_PENDING) {
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do {
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ntstatus = WaitForSingleObjectEx(CompletionEvent, 0xffffffff, TRUE);
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} while ( ntstatus == WAIT_IO_COMPLETION );
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}
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if (NT_SUCCESS(ntstatus)) {
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ntstatus = IoStatusBlock.Status;
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}
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}
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CloseHandle(CompletionEvent);
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return (ntstatus);
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}
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