FreeRDP/channels/drive/client/drive_main.c
2014-12-03 14:17:27 -05:00

761 lines
17 KiB
C

/**
* FreeRDP: A Remote Desktop Protocol Implementation
* File System Virtual Channel
*
* Copyright 2010-2011 Vic Lee
* Copyright 2010-2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef _WIN32
#define __USE_LARGEFILE64
#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE
#include <sys/time.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winpr/crt.h>
#include <winpr/synch.h>
#include <winpr/thread.h>
#include <winpr/stream.h>
#include <winpr/interlocked.h>
#include <winpr/collections.h>
#include <freerdp/channels/rdpdr.h>
#include "drive_file.h"
typedef struct _DRIVE_DEVICE DRIVE_DEVICE;
struct _DRIVE_DEVICE
{
DEVICE device;
char* path;
wListDictionary* files;
HANDLE thread;
wMessageQueue* IrpQueue;
DEVMAN* devman;
};
static UINT32 drive_map_posix_err(int fs_errno)
{
UINT32 rc;
/* try to return NTSTATUS version of error code */
switch (fs_errno)
{
case EPERM:
case EACCES:
rc = STATUS_ACCESS_DENIED;
break;
case ENOENT:
rc = STATUS_NO_SUCH_FILE;
break;
case EBUSY:
rc = STATUS_DEVICE_BUSY;
break;
case EEXIST:
rc = STATUS_OBJECT_NAME_COLLISION;
break;
case EISDIR:
rc = STATUS_FILE_IS_A_DIRECTORY;
break;
default:
rc = STATUS_UNSUCCESSFUL;
break;
}
return rc;
}
static DRIVE_FILE* drive_get_file_by_id(DRIVE_DEVICE* drive, UINT32 id)
{
DRIVE_FILE* file = NULL;
void* key = (void*) (size_t) id;
file = (DRIVE_FILE*) ListDictionary_GetItemValue(drive->files, key);
return file;
}
static void drive_process_irp_create(DRIVE_DEVICE* drive, IRP* irp)
{
int status;
void* key;
UINT32 FileId;
DRIVE_FILE* file;
BYTE Information;
UINT32 DesiredAccess;
UINT32 CreateDisposition;
UINT32 CreateOptions;
UINT32 PathLength;
char* path = NULL;
Stream_Read_UINT32(irp->input, DesiredAccess);
Stream_Seek(irp->input, 16); /* AllocationSize(8), FileAttributes(4), SharedAccess(4) */
Stream_Read_UINT32(irp->input, CreateDisposition);
Stream_Read_UINT32(irp->input, CreateOptions);
Stream_Read_UINT32(irp->input, PathLength);
status = ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) Stream_Pointer(irp->input),
PathLength / 2, &path, 0, NULL, NULL);
if (status < 1)
path = (char*) calloc(1, 1);
FileId = irp->devman->id_sequence++;
file = drive_file_new(drive->path, path, FileId,
DesiredAccess, CreateDisposition, CreateOptions);
if (!file)
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
FileId = 0;
Information = 0;
}
else if (file->err)
{
FileId = 0;
Information = 0;
/* map errno to windows result */
irp->IoStatus = drive_map_posix_err(file->err);
drive_file_free(file);
}
else
{
key = (void*) (size_t) file->id;
ListDictionary_Add(drive->files, key, file);
switch (CreateDisposition)
{
case FILE_SUPERSEDE:
case FILE_OPEN:
case FILE_CREATE:
case FILE_OVERWRITE:
Information = FILE_SUPERSEDED;
break;
case FILE_OPEN_IF:
Information = FILE_OPENED;
break;
case FILE_OVERWRITE_IF:
Information = FILE_OVERWRITTEN;
break;
default:
Information = 0;
break;
}
}
Stream_Write_UINT32(irp->output, FileId);
Stream_Write_UINT8(irp->output, Information);
free(path);
irp->Complete(irp);
}
static void drive_process_irp_close(DRIVE_DEVICE* drive, IRP* irp)
{
void* key;
DRIVE_FILE* file;
file = drive_get_file_by_id(drive, irp->FileId);
key = (void*) (size_t) irp->FileId;
if (!file)
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
}
else
{
ListDictionary_Remove(drive->files, key);
drive_file_free(file);
}
Stream_Zero(irp->output, 5); /* Padding(5) */
irp->Complete(irp);
}
static void drive_process_irp_read(DRIVE_DEVICE* drive, IRP* irp)
{
DRIVE_FILE* file;
UINT32 Length;
UINT64 Offset;
BYTE* buffer = NULL;
Stream_Read_UINT32(irp->input, Length);
Stream_Read_UINT64(irp->input, Offset);
file = drive_get_file_by_id(drive, irp->FileId);
if (!file)
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
Length = 0;
}
else if (!drive_file_seek(file, Offset))
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
Length = 0;
}
else
{
buffer = (BYTE*) malloc(Length);
if (!drive_file_read(file, buffer, &Length))
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
free(buffer);
buffer = NULL;
Length = 0;
}
else
{
}
}
Stream_Write_UINT32(irp->output, Length);
if (Length > 0)
{
Stream_EnsureRemainingCapacity(irp->output, (int) Length);
Stream_Write(irp->output, buffer, Length);
}
free(buffer);
irp->Complete(irp);
}
static void drive_process_irp_write(DRIVE_DEVICE* drive, IRP* irp)
{
DRIVE_FILE* file;
UINT32 Length;
UINT64 Offset;
Stream_Read_UINT32(irp->input, Length);
Stream_Read_UINT64(irp->input, Offset);
Stream_Seek(irp->input, 20); /* Padding */
file = drive_get_file_by_id(drive, irp->FileId);
if (!file)
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
Length = 0;
}
else if (!drive_file_seek(file, Offset))
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
Length = 0;
}
else if (!drive_file_write(file, Stream_Pointer(irp->input), Length))
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
Length = 0;
}
else
{
}
Stream_Write_UINT32(irp->output, Length);
Stream_Write_UINT8(irp->output, 0); /* Padding */
irp->Complete(irp);
}
static void drive_process_irp_query_information(DRIVE_DEVICE* drive, IRP* irp)
{
DRIVE_FILE* file;
UINT32 FsInformationClass;
Stream_Read_UINT32(irp->input, FsInformationClass);
file = drive_get_file_by_id(drive, irp->FileId);
if (!file)
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
}
else if (!drive_file_query_information(file, FsInformationClass, irp->output))
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
}
else
{
}
irp->Complete(irp);
}
static void drive_process_irp_set_information(DRIVE_DEVICE* drive, IRP* irp)
{
DRIVE_FILE* file;
UINT32 FsInformationClass;
UINT32 Length;
Stream_Read_UINT32(irp->input, FsInformationClass);
Stream_Read_UINT32(irp->input, Length);
Stream_Seek(irp->input, 24); /* Padding */
file = drive_get_file_by_id(drive, irp->FileId);
if (!file)
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
}
else if (!drive_file_set_information(file, FsInformationClass, Length, irp->input))
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
}
else
{
}
if (file && file->is_dir && !dir_empty(file->fullpath))
irp->IoStatus = STATUS_DIRECTORY_NOT_EMPTY;
Stream_Write_UINT32(irp->output, Length);
irp->Complete(irp);
}
static void drive_process_irp_query_volume_information(DRIVE_DEVICE* drive, IRP* irp)
{
UINT32 FsInformationClass;
wStream* output = irp->output;
struct STATVFS svfst;
struct STAT st;
char* volumeLabel = {"FREERDP"};
char* diskType = {"FAT32"};
WCHAR* outStr = NULL;
int length;
Stream_Read_UINT32(irp->input, FsInformationClass);
STATVFS(drive->path, &svfst);
STAT(drive->path, &st);
switch (FsInformationClass)
{
case FileFsVolumeInformation:
/* http://msdn.microsoft.com/en-us/library/cc232108.aspx */
length = ConvertToUnicode(sys_code_page, 0, volumeLabel, -1, &outStr, 0) * 2;
Stream_Write_UINT32(output, 17 + length); /* Length */
Stream_EnsureRemainingCapacity(output, 17 + length);
Stream_Write_UINT64(output, FILE_TIME_SYSTEM_TO_RDP(st.st_ctime)); /* VolumeCreationTime */
#ifdef ANDROID
Stream_Write_UINT32(output, svfst.f_fsid.__val[0]); /* VolumeSerialNumber */
#else
Stream_Write_UINT32(output, svfst.f_fsid); /* VolumeSerialNumber */
#endif
Stream_Write_UINT32(output, length); /* VolumeLabelLength */
Stream_Write_UINT8(output, 0); /* SupportsObjects */
/* Reserved(1), MUST NOT be added! */
Stream_Write(output, outStr, length); /* VolumeLabel (Unicode) */
free(outStr);
break;
case FileFsSizeInformation:
/* http://msdn.microsoft.com/en-us/library/cc232107.aspx */
Stream_Write_UINT32(output, 24); /* Length */
Stream_EnsureRemainingCapacity(output, 24);
Stream_Write_UINT64(output, svfst.f_blocks); /* TotalAllocationUnits */
Stream_Write_UINT64(output, svfst.f_bavail); /* AvailableAllocationUnits */
Stream_Write_UINT32(output, 1); /* SectorsPerAllocationUnit */
Stream_Write_UINT32(output, svfst.f_bsize); /* BytesPerSector */
break;
case FileFsAttributeInformation:
/* http://msdn.microsoft.com/en-us/library/cc232101.aspx */
length = ConvertToUnicode(sys_code_page, 0, diskType, -1, &outStr, 0) * 2;
Stream_Write_UINT32(output, 12 + length); /* Length */
Stream_EnsureRemainingCapacity(output, 12 + length);
Stream_Write_UINT32(output,
FILE_CASE_SENSITIVE_SEARCH |
FILE_CASE_PRESERVED_NAMES |
FILE_UNICODE_ON_DISK); /* FileSystemAttributes */
#ifdef ANDROID
Stream_Write_UINT32(output, 255); /* MaximumComponentNameLength */
#else
Stream_Write_UINT32(output, svfst.f_namemax/*510*/); /* MaximumComponentNameLength */
#endif
Stream_Write_UINT32(output, length); /* FileSystemNameLength */
Stream_Write(output, outStr, length); /* FileSystemName (Unicode) */
free(outStr);
break;
case FileFsFullSizeInformation:
/* http://msdn.microsoft.com/en-us/library/cc232104.aspx */
Stream_Write_UINT32(output, 32); /* Length */
Stream_EnsureRemainingCapacity(output, 32);
Stream_Write_UINT64(output, svfst.f_blocks); /* TotalAllocationUnits */
Stream_Write_UINT64(output, svfst.f_bavail); /* CallerAvailableAllocationUnits */
Stream_Write_UINT64(output, svfst.f_bfree); /* AvailableAllocationUnits */
Stream_Write_UINT32(output, 1); /* SectorsPerAllocationUnit */
Stream_Write_UINT32(output, svfst.f_bsize); /* BytesPerSector */
break;
case FileFsDeviceInformation:
/* http://msdn.microsoft.com/en-us/library/cc232109.aspx */
Stream_Write_UINT32(output, 8); /* Length */
Stream_EnsureRemainingCapacity(output, 8);
Stream_Write_UINT32(output, FILE_DEVICE_DISK); /* DeviceType */
Stream_Write_UINT32(output, 0); /* Characteristics */
break;
default:
irp->IoStatus = STATUS_UNSUCCESSFUL;
Stream_Write_UINT32(output, 0); /* Length */
break;
}
irp->Complete(irp);
}
/* http://msdn.microsoft.com/en-us/library/cc241518.aspx */
static void drive_process_irp_silent_ignore(DRIVE_DEVICE* drive, IRP* irp)
{
UINT32 FsInformationClass;
wStream* output = irp->output;
Stream_Read_UINT32(irp->input, FsInformationClass);
Stream_Write_UINT32(output, 0); /* Length */
irp->Complete(irp);
}
static void drive_process_irp_query_directory(DRIVE_DEVICE* drive, IRP* irp)
{
char* path = NULL;
int status;
DRIVE_FILE* file;
BYTE InitialQuery;
UINT32 PathLength;
UINT32 FsInformationClass;
Stream_Read_UINT32(irp->input, FsInformationClass);
Stream_Read_UINT8(irp->input, InitialQuery);
Stream_Read_UINT32(irp->input, PathLength);
Stream_Seek(irp->input, 23); /* Padding */
status = ConvertFromUnicode(CP_UTF8, 0, (WCHAR*) Stream_Pointer(irp->input),
PathLength / 2, &path, 0, NULL, NULL);
if (status < 1)
path = (char*) calloc(1, 1);
file = drive_get_file_by_id(drive, irp->FileId);
if (file == NULL)
{
irp->IoStatus = STATUS_UNSUCCESSFUL;
Stream_Write_UINT32(irp->output, 0); /* Length */
}
else if (!drive_file_query_directory(file, FsInformationClass, InitialQuery, path, irp->output))
{
irp->IoStatus = STATUS_NO_MORE_FILES;
}
free(path);
irp->Complete(irp);
}
static void drive_process_irp_directory_control(DRIVE_DEVICE* drive, IRP* irp)
{
switch (irp->MinorFunction)
{
case IRP_MN_QUERY_DIRECTORY:
drive_process_irp_query_directory(drive, irp);
break;
case IRP_MN_NOTIFY_CHANGE_DIRECTORY: /* TODO */
irp->Discard(irp);
break;
default:
irp->IoStatus = STATUS_NOT_SUPPORTED;
Stream_Write_UINT32(irp->output, 0); /* Length */
irp->Complete(irp);
break;
}
}
static void drive_process_irp_device_control(DRIVE_DEVICE* drive, IRP* irp)
{
Stream_Write_UINT32(irp->output, 0); /* OutputBufferLength */
irp->Complete(irp);
}
static void drive_process_irp(DRIVE_DEVICE* drive, IRP* irp)
{
irp->IoStatus = STATUS_SUCCESS;
switch (irp->MajorFunction)
{
case IRP_MJ_CREATE:
drive_process_irp_create(drive, irp);
break;
case IRP_MJ_CLOSE:
drive_process_irp_close(drive, irp);
break;
case IRP_MJ_READ:
drive_process_irp_read(drive, irp);
break;
case IRP_MJ_WRITE:
drive_process_irp_write(drive, irp);
break;
case IRP_MJ_QUERY_INFORMATION:
drive_process_irp_query_information(drive, irp);
break;
case IRP_MJ_SET_INFORMATION:
drive_process_irp_set_information(drive, irp);
break;
case IRP_MJ_QUERY_VOLUME_INFORMATION:
drive_process_irp_query_volume_information(drive, irp);
break;
case IRP_MJ_LOCK_CONTROL:
drive_process_irp_silent_ignore(drive, irp);
break;
case IRP_MJ_DIRECTORY_CONTROL:
drive_process_irp_directory_control(drive, irp);
break;
case IRP_MJ_DEVICE_CONTROL:
drive_process_irp_device_control(drive, irp);
break;
default:
irp->IoStatus = STATUS_NOT_SUPPORTED;
irp->Complete(irp);
break;
}
}
static void* drive_thread_func(void* arg)
{
IRP* irp;
wMessage message;
DRIVE_DEVICE* drive = (DRIVE_DEVICE*) arg;
while (1)
{
if (!MessageQueue_Wait(drive->IrpQueue))
break;
if (!MessageQueue_Peek(drive->IrpQueue, &message, TRUE))
break;
if (message.id == WMQ_QUIT)
break;
irp = (IRP*) message.wParam;
if (irp)
drive_process_irp(drive, irp);
}
ExitThread(0);
return NULL;
}
static void drive_irp_request(DEVICE* device, IRP* irp)
{
DRIVE_DEVICE* drive = (DRIVE_DEVICE*) device;
MessageQueue_Post(drive->IrpQueue, NULL, 0, (void*) irp, NULL);
}
static void drive_free(DEVICE* device)
{
DRIVE_DEVICE* drive = (DRIVE_DEVICE*) device;
MessageQueue_PostQuit(drive->IrpQueue, 0);
WaitForSingleObject(drive->thread, INFINITE);
CloseHandle(drive->thread);
ListDictionary_Free(drive->files);
MessageQueue_Free(drive->IrpQueue);
Stream_Free(drive->device.data, TRUE);
free(drive);
}
void drive_register_drive_path(PDEVICE_SERVICE_ENTRY_POINTS pEntryPoints, char* name, char* path)
{
int i, length;
DRIVE_DEVICE* drive;
#ifdef WIN32
/*
* We cannot enter paths like c:\ because : is an arg separator
* thus, paths are entered as c+\ and the + is substituted here
*/
if (path[1] == '+')
{
if ((path[0]>='a' && path[0]<='z') || (path[0]>='A' && path[0]<='Z'))
{
path[1] = ':';
}
}
#endif
if (name[0] && path[0])
{
drive = (DRIVE_DEVICE*) malloc(sizeof(DRIVE_DEVICE));
ZeroMemory(drive, sizeof(DRIVE_DEVICE));
drive->device.type = RDPDR_DTYP_FILESYSTEM;
drive->device.name = name;
drive->device.IRPRequest = drive_irp_request;
drive->device.Free = drive_free;
length = (int) strlen(name);
drive->device.data = Stream_New(NULL, length + 1);
for (i = 0; i <= length; i++)
Stream_Write_UINT8(drive->device.data, name[i] < 0 ? '_' : name[i]);
drive->path = path;
drive->files = ListDictionary_New(TRUE);
ListDictionary_ValueObject(drive->files)->fnObjectFree = (OBJECT_FREE_FN) drive_file_free;
drive->IrpQueue = MessageQueue_New(NULL);
drive->thread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) drive_thread_func, drive, CREATE_SUSPENDED, NULL);
pEntryPoints->RegisterDevice(pEntryPoints->devman, (DEVICE*) drive);
ResumeThread(drive->thread);
}
}
#ifdef STATIC_CHANNELS
#define DeviceServiceEntry drive_DeviceServiceEntry
#endif
UINT sys_code_page = 0;
int DeviceServiceEntry(PDEVICE_SERVICE_ENTRY_POINTS pEntryPoints)
{
RDPDR_DRIVE* drive;
#ifdef WIN32
char* dev;
int len;
char devlist[512], buf[512];
#endif
drive = (RDPDR_DRIVE*) pEntryPoints->device;
#ifndef WIN32
sys_code_page = CP_UTF8;
if (strcmp(drive->Path, "*") == 0)
{
/* all drives */
free(drive->Path);
drive->Path = _strdup("/");
}
else if (strcmp(drive->Path, "%") == 0)
{
char* home_env = NULL;
/* home directory */
home_env = getenv("HOME");
free(drive->Path);
if (home_env)
drive->Path = _strdup(home_env);
else
drive->Path = _strdup("/");
}
drive_register_drive_path(pEntryPoints, drive->Name, drive->Path);
#else
sys_code_page = GetACP();
/* Special case: path[0] == '*' -> export all drives */
/* Special case: path[0] == '%' -> user home dir */
if (strcmp(drive->Path, "%") == 0)
{
_snprintf(buf, sizeof(buf), "%s\\", getenv("USERPROFILE"));
drive_register_drive_path(pEntryPoints, drive->Name, _strdup(buf));
}
else if (strcmp(drive->Path, "*") == 0)
{
int i;
/* Enumerate all devices: */
GetLogicalDriveStringsA(sizeof(devlist) - 1, devlist);
for (dev = devlist, i = 0; *dev; dev += 4, i++)
{
if (*dev > 'B')
{
/* Suppress disk drives A and B to avoid pesty messages */
len = _snprintf(buf, sizeof(buf) - 4, "%s", drive->Name);
buf[len] = '_';
buf[len + 1] = dev[0];
buf[len + 2] = 0;
buf[len + 3] = 0;
drive_register_drive_path(pEntryPoints, _strdup(buf), _strdup(dev));
}
}
}
else
{
drive_register_drive_path(pEntryPoints, drive->Name, drive->Path);
}
#endif
return 0;
}