FreeRDP/channels/serial/client/serial_main.c

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/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Serial Port Device Service Virtual Channel
*
* Copyright 2011 O.S. Systems Software Ltda.
* Copyright 2011 Eduardo Fiss Beloni <beloni@ossystems.com.br>
* Copyright 2014 Hewlett-Packard Development Company, L.P.
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*
* 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
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#include <assert.h>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifdef HAVE_SYS_MODEM_H
#include <sys/modem.h>
#endif
#ifdef HAVE_SYS_FILIO_H
#include <sys/filio.h>
#endif
#ifdef HAVE_SYS_STRTIO_H
#include <sys/strtio.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
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#include <winpr/collections.h>
#include <winpr/comm.h>
#include <winpr/crt.h>
#include <winpr/stream.h>
#include <winpr/synch.h>
#include <winpr/thread.h>
#include <winpr/wlog.h>
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#include <freerdp/freerdp.h>
#include <freerdp/utils/list.h>
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#include <freerdp/channels/rdpdr.h>
#include <freerdp/utils/svc_plugin.h>
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typedef struct _SERIAL_DEVICE SERIAL_DEVICE;
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struct _SERIAL_DEVICE
{
DEVICE device;
HANDLE* hComm;
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// TMP: use of log
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wLog* log;
HANDLE MainThread;
wMessageQueue* MainIrpQueue;
HANDLE ReadThread;
wMessageQueue* ReadIrpQueue;
HANDLE WriteThread;
wMessageQueue* WriteIrpQueue;
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};
static void serial_process_irp_create(SERIAL_DEVICE* serial, IRP* irp)
{
DWORD DesiredAccess;
DWORD SharedAccess;
DWORD CreateDisposition;
UINT32 PathLength;
Stream_Read_UINT32(irp->input, DesiredAccess); /* DesiredAccess (4 bytes) */
Stream_Seek_UINT64(irp->input); /* AllocationSize (8 bytes) */
Stream_Seek_UINT32(irp->input); /* FileAttributes (4 bytes) */
Stream_Read_UINT32(irp->input, SharedAccess); /* SharedAccess (4 bytes) */
Stream_Read_UINT32(irp->input, CreateDisposition); /* CreateDisposition (4 bytes) */
Stream_Seek_UINT32(irp->input); /* CreateOptions (4 bytes) */
Stream_Read_UINT32(irp->input, PathLength); /* PathLength (4 bytes) */
Stream_Seek(irp->input, PathLength); /* Path (variable) */
assert(PathLength == 0); /* MS-RDPESP 2.2.2.2 */
#ifndef _WIN32
/* Windows 2012 server sends on a first call :
* DesiredAccess = 0x00100080: SYNCHRONIZE | FILE_READ_ATTRIBUTES
* SharedAccess = 0x00000007: FILE_SHARE_DELETE | FILE_SHARE_WRITE | FILE_SHARE_READ
* CreateDisposition = 0x00000001: CREATE_NEW
*
* then Windows 2012 sends :
* DesiredAccess = 0x00120089: SYNCHRONIZE | READ_CONTROL | FILE_READ_ATTRIBUTES | FILE_READ_EA | FILE_READ_DATA
* SharedAccess = 0x00000007: FILE_SHARE_DELETE | FILE_SHARE_WRITE | FILE_SHARE_READ
* CreateDisposition = 0x00000001: CREATE_NEW
*
* assert(DesiredAccess == (GENERIC_READ | GENERIC_WRITE));
* assert(SharedAccess == 0);
* assert(CreateDisposition == OPEN_EXISTING);
*
*/
DEBUG_SVC("DesiredAccess: 0x%0.8x, SharedAccess: 0x%0.8x, CreateDisposition: 0x%0.8x", DesiredAccess, SharedAccess, CreateDisposition);
/* FIXME: As of today only the flags below are supported by CommCreateFileA: */
DesiredAccess = GENERIC_READ | GENERIC_WRITE;
SharedAccess = 0;
CreateDisposition = OPEN_EXISTING;
#endif
serial->hComm = CreateFile(serial->device.name,
DesiredAccess,
SharedAccess,
NULL, /* SecurityAttributes */
CreateDisposition,
0, /* FlagsAndAttributes */
NULL); /* TemplateFile */
if (!serial->hComm || (serial->hComm == INVALID_HANDLE_VALUE))
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{
DEBUG_WARN("CreateFile failure: %s last-error: Ox%x\n", serial->device.name, GetLastError());
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irp->IoStatus = STATUS_UNSUCCESSFUL;
goto error_handle;
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}
/* NOTE: binary mode/raw mode required for the redirection. On
* Linux, CommCreateFileA forces this setting.
*/
/* ZeroMemory(&dcb, sizeof(DCB)); */
/* dcb.DCBlength = sizeof(DCB); */
/* GetCommState(serial->hComm, &dcb); */
/* dcb.fBinary = TRUE; */
/* SetCommState(serial->hComm, &dcb); */
// TMP:
COMMTIMEOUTS timeouts;
timeouts.ReadIntervalTimeout = MAXULONG; /* ensures a non blocking state */
timeouts.ReadTotalTimeoutMultiplier = 0;
timeouts.ReadTotalTimeoutConstant = 0;
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = 0;
SetCommTimeouts(serial->hComm, &timeouts);
assert(irp->FileId == 0);
irp->FileId = irp->devman->id_sequence++; /* FIXME: why not ((WINPR_COMM*)hComm)->fd? */
irp->IoStatus = STATUS_SUCCESS;
DEBUG_SVC("%s (DeviceId: %d, FileId: %d) created.", serial->device.name, irp->device->id, irp->FileId);
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error_handle:
Stream_Write_UINT32(irp->output, irp->FileId); /* FileId (4 bytes) */
Stream_Write_UINT8(irp->output, 0); /* Information (1 byte) */
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irp->Complete(irp);
}
static void serial_process_irp_close(SERIAL_DEVICE* serial, IRP* irp)
{
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Stream_Seek(irp->input, 32); /* Padding (32 bytes) */
if (!CloseHandle(serial->hComm))
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{
DEBUG_WARN("CloseHandle failure: %s (%d) closed.", serial->device.name, irp->device->id);
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irp->IoStatus = STATUS_UNSUCCESSFUL;
goto error_handle;
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}
DEBUG_SVC("%s (DeviceId: %d, FileId: %d) closed.", serial->device.name, irp->device->id, irp->FileId);
serial->hComm = NULL;
irp->IoStatus = STATUS_SUCCESS;
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error_handle:
Stream_Zero(irp->output, 5); /* Padding (5 bytes) */
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irp->Complete(irp);
}
static void serial_process_irp_read(SERIAL_DEVICE* serial, IRP* irp)
{
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UINT32 Length;
UINT64 Offset;
BYTE* buffer = NULL;
DWORD nbRead = 0;
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Stream_Read_UINT32(irp->input, Length); /* Length (4 bytes) */
Stream_Read_UINT64(irp->input, Offset); /* Offset (8 bytes) */
Stream_Seek(irp->input, 20); /* Padding (20 bytes) */
buffer = (BYTE*)calloc(Length, sizeof(BYTE));
if (buffer == NULL)
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{
irp->IoStatus = STATUS_NO_MEMORY;
goto error_handle;
}
/* MSRDPESP 3.2.5.1.4: If the Offset field is not set to 0, the value MUST be ignored
* assert(Offset == 0);
*/
DEBUG_SVC("reading %lu bytes from %s", Length, serial->device.name);
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/* FIXME: CommReadFile to be replaced by ReadFile */
if (CommReadFile(serial->hComm, buffer, Length, &nbRead, NULL))
{
irp->IoStatus = STATUS_SUCCESS;
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}
else
{
DEBUG_SVC("read failure to %s, nbRead=%d, last-error: 0x%0.8x", serial->device.name, nbRead, GetLastError());
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switch(GetLastError())
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{
case ERROR_INVALID_HANDLE:
irp->IoStatus = STATUS_INVALID_DEVICE_REQUEST;
break;
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case ERROR_NOT_SUPPORTED:
irp->IoStatus = STATUS_NOT_SUPPORTED;
break;
case ERROR_INVALID_PARAMETER:
irp->IoStatus = STATUS_INVALID_PARAMETER;
break;
case ERROR_IO_DEVICE:
irp->IoStatus = STATUS_IO_DEVICE_ERROR;
break;
case ERROR_TIMEOUT:
irp->IoStatus = STATUS_TIMEOUT;
break;
case ERROR_BAD_DEVICE:
irp->IoStatus = STATUS_INVALID_DEVICE_REQUEST;
break;
default:
DEBUG_SVC("unexpected last-error: 0x%x", GetLastError());
irp->IoStatus = STATUS_UNSUCCESSFUL;
break;
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}
}
error_handle:
Stream_Write_UINT32(irp->output, nbRead); /* Length (4 bytes) */
if (nbRead > 0)
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{
Stream_EnsureRemainingCapacity(irp->output, nbRead);
Stream_Write(irp->output, buffer, nbRead); /* ReadData */
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}
if (buffer)
free(buffer);
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irp->Complete(irp);
}
static void serial_process_irp_write(SERIAL_DEVICE* serial, IRP* irp)
{
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UINT32 Length;
UINT64 Offset;
DWORD nbWritten = 0;
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Stream_Read_UINT32(irp->input, Length); /* Length (4 bytes) */
Stream_Read_UINT64(irp->input, Offset); /* Offset (8 bytes) */
Stream_Seek(irp->input, 20); /* Padding (20 bytes) */
assert(Offset == 0); /* not implemented otherwise */
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DEBUG_SVC("writing %lu bytes to %s", Length, serial->device.name);
/* FIXME: CommWriteFile to be replaced by WriteFile */
if (CommWriteFile(serial->hComm, Stream_Pointer(irp->input), Length, &nbWritten, NULL))
{
irp->IoStatus = STATUS_SUCCESS;
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}
else
{
DEBUG_SVC("write failure to %s, nbWritten=%d, last-error: 0x%0.8x", serial->device.name, nbWritten, GetLastError());
switch(GetLastError())
{
case ERROR_INVALID_HANDLE:
irp->IoStatus = STATUS_INVALID_DEVICE_REQUEST;
break;
case ERROR_NOT_SUPPORTED:
irp->IoStatus = STATUS_NOT_SUPPORTED;
break;
case ERROR_INVALID_PARAMETER:
irp->IoStatus = STATUS_INVALID_PARAMETER;
break;
case ERROR_IO_DEVICE:
irp->IoStatus = STATUS_IO_DEVICE_ERROR;
break;
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case ERROR_TIMEOUT:
irp->IoStatus = STATUS_TIMEOUT;
break;
case ERROR_BAD_DEVICE:
irp->IoStatus = STATUS_INVALID_DEVICE_REQUEST;
break;
default:
DEBUG_SVC("unexpected last-error: 0x%x", GetLastError());
irp->IoStatus = STATUS_UNSUCCESSFUL;
break;
}
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}
DEBUG_SVC("%lu bytes written to %s", nbWritten, serial->device.name);
Stream_Write_UINT32(irp->output, nbWritten); /* Length (4 bytes) */
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Stream_Write_UINT8(irp->output, 0); /* Padding (1 byte) */
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irp->Complete(irp);
}
static void serial_process_irp_device_control(SERIAL_DEVICE* serial, IRP* irp)
{
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UINT32 IoControlCode;
UINT32 InputBufferLength;
BYTE* InputBuffer = NULL;
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UINT32 OutputBufferLength;
BYTE* OutputBuffer = NULL;
DWORD BytesReturned = 0;
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Stream_Read_UINT32(irp->input, OutputBufferLength); /* OutputBufferLength (4 bytes) */
Stream_Read_UINT32(irp->input, InputBufferLength); /* InputBufferLength (4 bytes) */
Stream_Read_UINT32(irp->input, IoControlCode); /* IoControlCode (4 bytes) */
Stream_Seek(irp->input, 20); /* Padding (20 bytes) */
OutputBuffer = (BYTE*)calloc(OutputBufferLength, sizeof(BYTE));
if (OutputBuffer == NULL)
{
irp->IoStatus = STATUS_NO_MEMORY;
goto error_handle;
}
InputBuffer = (BYTE*)calloc(InputBufferLength, sizeof(BYTE));
if (InputBuffer == NULL)
{
irp->IoStatus = STATUS_NO_MEMORY;
goto error_handle;
}
Stream_Read(irp->input, InputBuffer, InputBufferLength);
DEBUG_SVC("CommDeviceIoControl: IoControlCode 0x%x", IoControlCode);
/* FIXME: CommDeviceIoControl to be replaced by DeviceIoControl() */
if (CommDeviceIoControl(serial->hComm, IoControlCode, InputBuffer, InputBufferLength, OutputBuffer, OutputBufferLength, &BytesReturned, NULL))
{
irp->IoStatus = STATUS_SUCCESS;
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}
else
{
DEBUG_SVC("CommDeviceIoControl failure: IoControlCode 0x%0.8x last-error: 0x%x", IoControlCode, GetLastError());
switch(GetLastError())
{
case ERROR_INVALID_HANDLE:
irp->IoStatus = STATUS_INVALID_DEVICE_REQUEST;
break;
case ERROR_NOT_SUPPORTED:
irp->IoStatus = STATUS_NOT_SUPPORTED;
break;
case ERROR_INSUFFICIENT_BUFFER:
irp->IoStatus = STATUS_BUFFER_TOO_SMALL; /* TMP: better have STATUS_BUFFER_SIZE_TOO_SMALL? http://msdn.microsoft.com/en-us/library/windows/hardware/ff547466%28v=vs.85%29.aspx#generic_status_values_for_serial_device_control_requests */
break;
case ERROR_INVALID_PARAMETER:
irp->IoStatus = STATUS_INVALID_PARAMETER;
break;
case ERROR_CALL_NOT_IMPLEMENTED:
irp->IoStatus = STATUS_NOT_IMPLEMENTED;
break;
default:
DEBUG_SVC("unexpected last-error: 0x%x", GetLastError());
irp->IoStatus = STATUS_UNSUCCESSFUL;
break;
}
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}
error_handle:
Stream_Write_UINT32(irp->output, BytesReturned); /* OutputBufferLength (4 bytes) */
if (BytesReturned > 0)
{
Stream_EnsureRemainingCapacity(irp->output, BytesReturned);
Stream_Write(irp->output, OutputBuffer, BytesReturned); /* OutputBuffer */
}
/* TMP: FIXME: Why at least Windows 2008R2 gets lost with this
* extra byte and likely on a IOCTL_SERIAL_SET_BAUD_RATE? The
* extra byte is well required according MS-RDPEFS
* 2.2.1.5.5 */
/* else */
/* { */
/* Stream_Write_UINT8(irp->output, 0); /\* Padding (1 byte) *\/ */
/* } */
if (InputBuffer != NULL)
free(InputBuffer);
if (OutputBuffer != NULL)
free(OutputBuffer);
irp->Complete(irp);
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}
static void serial_process_irp(SERIAL_DEVICE* serial, IRP* irp)
{
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WLog_Print(serial->log, WLOG_DEBUG, "IRP MajorFunction: 0x%04X MinorFunction: 0x%04X\n",
irp->MajorFunction, irp->MinorFunction);
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switch (irp->MajorFunction)
{
case IRP_MJ_CREATE:
serial_process_irp_create(serial, irp);
break;
case IRP_MJ_CLOSE:
serial_process_irp_close(serial, irp);
break;
case IRP_MJ_READ:
serial_process_irp_read(serial, irp);
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break;
case IRP_MJ_WRITE:
serial_process_irp_write(serial, irp);
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break;
case IRP_MJ_DEVICE_CONTROL:
serial_process_irp_device_control(serial, irp);
break;
default:
DEBUG_WARN("MajorFunction 0x%X not supported", irp->MajorFunction);
irp->IoStatus = STATUS_NOT_SUPPORTED;
irp->Complete(irp);
break;
}
}
static void* serial_read_thread_func(void* arg)
{
IRP* irp;
wMessage message;
SERIAL_DEVICE* serial = (SERIAL_DEVICE*) arg;
while (1)
{
if (!MessageQueue_Wait(serial->ReadIrpQueue))
break;
if (!MessageQueue_Peek(serial->ReadIrpQueue, &message, TRUE))
break;
if (message.id == WMQ_QUIT)
break;
irp = (IRP*) message.wParam;
if (irp)
{
assert(irp->MajorFunction == IRP_MJ_READ);
serial_process_irp(serial, irp);
}
}
ExitThread(0);
return NULL;
}
static void* serial_write_thread_func(void* arg)
{
IRP* irp;
wMessage message;
SERIAL_DEVICE* serial = (SERIAL_DEVICE*) arg;
while (1)
{
if (!MessageQueue_Wait(serial->WriteIrpQueue))
break;
if (!MessageQueue_Peek(serial->WriteIrpQueue, &message, TRUE))
break;
if (message.id == WMQ_QUIT)
break;
irp = (IRP*) message.wParam;
if (irp)
{
assert(irp->MajorFunction == IRP_MJ_WRITE);
serial_process_irp(serial, irp);
}
}
ExitThread(0);
return NULL;
}
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static void* serial_thread_func(void* arg)
{
IRP* irp;
wMessage message;
SERIAL_DEVICE* serial = (SERIAL_DEVICE*) arg;
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while (1)
{
if (!MessageQueue_Wait(serial->MainIrpQueue))
break;
if (!MessageQueue_Peek(serial->MainIrpQueue, &message, TRUE))
break;
if (message.id == WMQ_QUIT)
break;
irp = (IRP*) message.wParam;
if (irp)
serial_process_irp(serial, irp);
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}
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ExitThread(0);
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return NULL;
}
static void serial_irp_request(DEVICE* device, IRP* irp)
{
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SERIAL_DEVICE* serial = (SERIAL_DEVICE*) device;
assert(irp != NULL);
if (irp == NULL)
return;
/* NB: ENABLE_ASYNCIO is set, (MS-RDPEFS 2.2.2.7.2) this
* allows the server to send multiple simultaneous read or
* write requests.
*/
switch(irp->MajorFunction)
{
case IRP_MJ_READ:
MessageQueue_Post(serial->ReadIrpQueue, NULL, 0, (void*) irp, NULL);
break;
case IRP_MJ_WRITE:
MessageQueue_Post(serial->WriteIrpQueue, NULL, 0, (void*) irp, NULL);
break;
default:
MessageQueue_Post(serial->MainIrpQueue, NULL, 0, (void*) irp, NULL);
}
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}
static void serial_free(DEVICE* device)
{
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SERIAL_DEVICE* serial = (SERIAL_DEVICE*) device;
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WLog_Print(serial->log, WLOG_DEBUG, "freeing");
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/* TMP: FIXME: also send a signal to interrupt I/O */
MessageQueue_PostQuit(serial->ReadIrpQueue, 0);
WaitForSingleObject(serial->ReadThread, INFINITE);
CloseHandle(serial->ReadThread);
MessageQueue_PostQuit(serial->WriteIrpQueue, 0);
WaitForSingleObject(serial->WriteThread, INFINITE);
CloseHandle(serial->WriteThread);
MessageQueue_PostQuit(serial->MainIrpQueue, 0);
WaitForSingleObject(serial->MainThread, INFINITE);
CloseHandle(serial->MainThread);
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if (serial->hComm)
CloseHandle(serial->hComm);
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/* Clean up resources */
Stream_Free(serial->device.data, TRUE);
MessageQueue_Free(serial->ReadIrpQueue);
MessageQueue_Free(serial->WriteIrpQueue);
MessageQueue_Free(serial->MainIrpQueue);
free(serial);
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}
#ifdef STATIC_CHANNELS
#define DeviceServiceEntry serial_DeviceServiceEntry
#endif
int DeviceServiceEntry(PDEVICE_SERVICE_ENTRY_POINTS pEntryPoints)
{
int i, len;
char* name;
char* path;
RDPDR_SERIAL* device;
SERIAL_DEVICE* serial;
device = (RDPDR_SERIAL*) pEntryPoints->device;
name = device->Name;
path = device->Path;
if (!name || (name[0] == '*'))
{
/* TODO: implement auto detection of parallel ports */
return 0;
}
if ((name && name[0]) && (path && path[0]))
{
DEBUG_SVC("Defining %s as %s", name, path);
if (!DefineCommDevice(name /* eg: COM1 */, path /* eg: /dev/ttyS0 */))
{
DEBUG_SVC("Could not define %s as %s", name, path);
return -1;
}
serial = (SERIAL_DEVICE*) calloc(1, sizeof(SERIAL_DEVICE));
if (!serial)
return -1;
serial->device.type = RDPDR_DTYP_SERIAL;
serial->device.name = name;
serial->device.IRPRequest = serial_irp_request;
serial->device.Free = serial_free;
len = strlen(name);
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serial->device.data = Stream_New(NULL, len + 1);
for (i = 0; i <= len; i++)
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Stream_Write_UINT8(serial->device.data, name[i] < 0 ? '_' : name[i]);
serial->ReadIrpQueue = MessageQueue_New(NULL);
serial->WriteIrpQueue = MessageQueue_New(NULL);
serial->MainIrpQueue = MessageQueue_New(NULL);
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WLog_Init();
serial->log = WLog_Get("com.freerdp.channel.serial.client");
WLog_Print(serial->log, WLOG_DEBUG, "initializing");
pEntryPoints->RegisterDevice(pEntryPoints->devman, (DEVICE*) serial);
serial->ReadThread = CreateThread(NULL,
0,
(LPTHREAD_START_ROUTINE) serial_read_thread_func,
(void*) serial,
0,
NULL);
serial->WriteThread = CreateThread(NULL,
0,
(LPTHREAD_START_ROUTINE) serial_write_thread_func,
(void*) serial,
0,
NULL);
serial->MainThread = CreateThread(NULL,
0,
(LPTHREAD_START_ROUTINE) serial_thread_func,
(void*) serial,
0,
NULL);
}
return 0;
}