static BOOL _set_baud_rate(WINPR_COMM *pComm, const SERIAL_BAUD_RATE *pBaudRate)
{
int i;
speed_t newSpeed;
struct termios futureState;
ZeroMemory(&futureState, sizeof(struct termios));
if (tcgetattr(pComm->fd, &futureState) < 0) /* NB: preserves current settings not directly handled by the Communication Functions */
{
SetLastError(ERROR_IO_DEVICE);
return FALSE;
}
for (i=0; _BAUD_TABLE[i][0]<_BAUD_TABLE_END; i++)
{
if (_BAUD_TABLE[i][1] == pBaudRate->BaudRate)
{
newSpeed = _BAUD_TABLE[i][0];
if (cfsetspeed(&futureState, newSpeed) < 0)
{
CommLog_Print(WLOG_WARN, "failed to set speed 0x%x (%"PRIu32")", newSpeed, pBaudRate->BaudRate);
return FALSE;
}
assert(cfgetispeed(&futureState) == newSpeed);
if (_comm_ioctl_tcsetattr(pComm->fd, TCSANOW, &futureState) < 0)
{
CommLog_Print(WLOG_WARN, "_comm_ioctl_tcsetattr failure: last-error: 0x%"PRIX32"", GetLastError());
return FALSE;
}
return TRUE;
}
}
CommLog_Print(WLOG_WARN, "could not find a matching speed for the baud rate %"PRIu32"", pBaudRate->BaudRate);
SetLastError(ERROR_INVALID_DATA);
return FALSE;
}
static BOOL _set_baud_rate(WINPR_COMM *pComm, const SERIAL_BAUD_RATE *pBaudRate)
{
int i;
speed_t newSpeed;
struct termios upcomingTermios;
ZeroMemory(&upcomingTermios, sizeof(struct termios));
if (tcgetattr(pComm->fd, &upcomingTermios) < 0)
{
SetLastError(ERROR_IO_DEVICE);
return FALSE;
}
for (i=0; _SERIAL_SYS_BAUD_TABLE[i][0]<=_SERIAL_MAX_BAUD; i++)
{
if (_SERIAL_SYS_BAUD_TABLE[i][1] == pBaudRate->BaudRate)
{
newSpeed = _SERIAL_SYS_BAUD_TABLE[i][0];
if (cfsetspeed(&upcomingTermios, newSpeed) < 0)
{
CommLog_Print(WLOG_WARN, "failed to set speed %u (%lu)", newSpeed, pBaudRate->BaudRate);
return FALSE;
}
if (_comm_ioctl_tcsetattr(pComm->fd, TCSANOW, &upcomingTermios) < 0)
{
CommLog_Print(WLOG_WARN, "_comm_ioctl_tcsetattr failure: last-error: 0x%lX", GetLastError());
return FALSE;
}
return TRUE;
}
}
CommLog_Print(WLOG_WARN, "could not find a matching speed for the baud rate %lu", pBaudRate->BaudRate);
SetLastError(ERROR_INVALID_DATA);
return FALSE;
}
/**
* @return TRUE on success, FALSE otherwise.
*
* As of today, SetCommState() can fail half-way with some settings
* applied and some others not. SetCommState() returns on the first
* failure met. FIXME: or is it correct?
*
* ERRORS:
* ERROR_INVALID_HANDLE
* ERROR_IO_DEVICE
*/
BOOL SetCommState(HANDLE hFile, LPDCB lpDCB)
{
struct termios upcomingTermios;
WINPR_COMM* pComm = (WINPR_COMM*) hFile;
DWORD bytesReturned;
/* FIXME: validate changes according GetCommProperties? */
if (!CommInitialized())
return FALSE;
if (!pComm || pComm->Type != HANDLE_TYPE_COMM || !pComm->fd )
{
SetLastError(ERROR_INVALID_HANDLE);
return FALSE;
}
if (!lpDCB)
{
SetLastError(ERROR_INVALID_DATA);
return FALSE;
}
/* NB: did the choice to call ioctls first when available and
then to setup upcomingTermios. Don't mix both stages. */
/** ioctl calls stage **/
SERIAL_BAUD_RATE baudRate;
baudRate.BaudRate = lpDCB->BaudRate;
if (!CommDeviceIoControl(pComm, IOCTL_SERIAL_SET_BAUD_RATE, &baudRate, sizeof(SERIAL_BAUD_RATE), NULL, 0, &bytesReturned, NULL))
{
CommLog_Print(WLOG_WARN, "SetCommState failure: could not set the baud rate.");
return FALSE;
}
SERIAL_CHARS serialChars;
if (!CommDeviceIoControl(pComm, IOCTL_SERIAL_GET_CHARS, NULL, 0, &serialChars, sizeof(SERIAL_CHARS), &bytesReturned, NULL)) /* as of today, required for BreakChar */
{
CommLog_Print(WLOG_WARN, "SetCommState failure: could not get the initial serial chars.");
return FALSE;
}
serialChars.XonChar = lpDCB->XonChar;
serialChars.XoffChar = lpDCB->XoffChar;
serialChars.ErrorChar = lpDCB->ErrorChar;
serialChars.EofChar = lpDCB->EofChar;
serialChars.EventChar = lpDCB->EvtChar;
if (!CommDeviceIoControl(pComm, IOCTL_SERIAL_SET_CHARS, &serialChars, sizeof(SERIAL_CHARS), NULL, 0, &bytesReturned, NULL))
{
CommLog_Print(WLOG_WARN, "SetCommState failure: could not set the serial chars.");
return FALSE;
}
SERIAL_LINE_CONTROL lineControl;
lineControl.StopBits = lpDCB->StopBits;
lineControl.Parity = lpDCB->Parity;
lineControl.WordLength = lpDCB->ByteSize;
if (!CommDeviceIoControl(pComm, IOCTL_SERIAL_SET_LINE_CONTROL, &lineControl, sizeof(SERIAL_LINE_CONTROL), NULL, 0, &bytesReturned, NULL))
{
CommLog_Print(WLOG_WARN, "SetCommState failure: could not set the control settings.");
return FALSE;
}
SERIAL_HANDFLOW handflow;
ZeroMemory(&handflow, sizeof(SERIAL_HANDFLOW));
if (lpDCB->fOutxCtsFlow)
{
handflow.ControlHandShake |= SERIAL_CTS_HANDSHAKE;
}
if (lpDCB->fOutxDsrFlow)
{
handflow.ControlHandShake |= SERIAL_DSR_HANDSHAKE;
}
switch (lpDCB->fDtrControl)
{
case SERIAL_DTR_HANDSHAKE:
handflow.ControlHandShake |= DTR_CONTROL_HANDSHAKE;
break;
case SERIAL_DTR_CONTROL:
handflow.ControlHandShake |= DTR_CONTROL_ENABLE;
break;
case DTR_CONTROL_DISABLE:
/* do nothing since handflow is init-zeroed */
break;
default:
CommLog_Print(WLOG_WARN, "Unexpected fDtrControl value: %d\n", lpDCB->fDtrControl);
return FALSE;
}
if (lpDCB->fDsrSensitivity)
{
handflow.ControlHandShake |= SERIAL_DSR_SENSITIVITY;
}
if (lpDCB->fTXContinueOnXoff)
{
handflow.FlowReplace |= SERIAL_XOFF_CONTINUE;
}
if (lpDCB->fOutX)
{
handflow.FlowReplace |= SERIAL_AUTO_TRANSMIT;
}
if (lpDCB->fInX)
{
handflow.FlowReplace |= SERIAL_AUTO_RECEIVE;
}
if (lpDCB->fErrorChar)
{
handflow.FlowReplace |= SERIAL_ERROR_CHAR;
}
if (lpDCB->fNull)
{
handflow.FlowReplace |= SERIAL_NULL_STRIPPING;
}
switch (lpDCB->fRtsControl)
{
case RTS_CONTROL_TOGGLE:
CommLog_Print(WLOG_WARN, "Unsupported RTS_CONTROL_TOGGLE feature");
// FIXME: see also GetCommState()
return FALSE;
case RTS_CONTROL_HANDSHAKE:
handflow.FlowReplace |= SERIAL_RTS_HANDSHAKE;
break;
case RTS_CONTROL_ENABLE:
handflow.FlowReplace |= SERIAL_RTS_CONTROL;
break;
case RTS_CONTROL_DISABLE:
/* do nothing since handflow is init-zeroed */
break;
default:
CommLog_Print(WLOG_WARN, "Unexpected fRtsControl value: %d\n", lpDCB->fRtsControl);
return FALSE;
}
if (lpDCB->fAbortOnError)
{
handflow.ControlHandShake |= SERIAL_ERROR_ABORT;
}
/* lpDCB->fDummy2 not used */
/* lpLocalDcb->wReserved ignored */
handflow.XonLimit = lpDCB->XonLim;
handflow.XoffLimit = lpDCB->XoffLim;
if (!CommDeviceIoControl(pComm, IOCTL_SERIAL_SET_HANDFLOW, &handflow, sizeof(SERIAL_HANDFLOW), NULL, 0, &bytesReturned, NULL))
{
CommLog_Print(WLOG_WARN, "SetCommState failure: could not set the handflow settings.");
return FALSE;
}
/** upcomingTermios stage **/
ZeroMemory(&upcomingTermios, sizeof(struct termios));
if (tcgetattr(pComm->fd, &upcomingTermios) < 0) /* NB: preserves current settings not directly handled by the Communication Functions */
{
SetLastError(ERROR_IO_DEVICE);
return FALSE;
}
if (lpDCB->fBinary)
{
upcomingTermios.c_lflag &= ~ICANON;
}
else
{
upcomingTermios.c_lflag |= ICANON;
CommLog_Print(WLOG_WARN, "Unexpected nonbinary mode, consider to unset the ICANON flag.");
}
if (lpDCB->fParity)
{
upcomingTermios.c_iflag |= INPCK;
}
else
{
upcomingTermios.c_iflag &= ~INPCK;
}
/* http://msdn.microsoft.com/en-us/library/windows/desktop/aa363423%28v=vs.85%29.aspx
*
* The SetCommState function reconfigures the communications
* resource, but it does not affect the internal output and
* input buffers of the specified driver. The buffers are not
* flushed, and pending read and write operations are not
* terminated prematurely.
*
* TCSANOW matches the best this definition
*/
if (_comm_ioctl_tcsetattr(pComm->fd, TCSANOW, &upcomingTermios) < 0)
{
SetLastError(ERROR_IO_DEVICE);
return FALSE;
}
return TRUE;
}
/**
* http://msdn.microsoft.com/en-us/library/windows/desktop/aa363198%28v=vs.85%29.aspx
*
* @param lpDeviceName e.g. COM1, \\.\COM1, ...
*
* @param dwDesiredAccess expects GENERIC_READ | GENERIC_WRITE, a
* warning message is printed otherwise. TODO: better support.
*
* @param dwShareMode must be zero, INVALID_HANDLE_VALUE is returned
* otherwise and GetLastError() should return ERROR_SHARING_VIOLATION.
*
* @param lpSecurityAttributes NULL expected, a warning message is printed
* otherwise. TODO: better support.
*
* @param dwCreationDisposition must be OPEN_EXISTING. If the
* communication device doesn't exist INVALID_HANDLE_VALUE is returned
* and GetLastError() returns ERROR_FILE_NOT_FOUND.
*
* @param dwFlagsAndAttributes zero expected, a warning message is
* printed otherwise.
*
* @param hTemplateFile must be NULL.
*
* @return INVALID_HANDLE_VALUE on error.
*/
HANDLE CommCreateFileA(LPCSTR lpDeviceName, DWORD dwDesiredAccess, DWORD dwShareMode, LPSECURITY_ATTRIBUTES lpSecurityAttributes,
DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes, HANDLE hTemplateFile)
{
CHAR devicePath[MAX_PATH];
struct stat deviceStat;
WINPR_COMM* pComm = NULL;
struct termios upcomingTermios;
if (!CommInitialized())
return INVALID_HANDLE_VALUE;
if (dwDesiredAccess != (GENERIC_READ | GENERIC_WRITE))
{
CommLog_Print(WLOG_WARN, "unexpected access to the device: 0x%lX", dwDesiredAccess);
}
if (dwShareMode != 0)
{
SetLastError(ERROR_SHARING_VIOLATION);
return INVALID_HANDLE_VALUE;
}
/* TODO: Prevents other processes from opening a file or
* device if they request delete, read, or write access. */
if (lpSecurityAttributes != NULL)
{
CommLog_Print(WLOG_WARN, "unexpected security attributes, nLength=%lu", lpSecurityAttributes->nLength);
}
if (dwCreationDisposition != OPEN_EXISTING)
{
SetLastError(ERROR_FILE_NOT_FOUND); /* FIXME: ERROR_NOT_SUPPORTED better? */
return INVALID_HANDLE_VALUE;
}
if (QueryCommDevice(lpDeviceName, devicePath, MAX_PATH) <= 0)
{
/* SetLastError(GetLastError()); */
return INVALID_HANDLE_VALUE;
}
if (stat(devicePath, &deviceStat) < 0)
{
CommLog_Print(WLOG_WARN, "device not found %s", devicePath);
SetLastError(ERROR_FILE_NOT_FOUND);
return INVALID_HANDLE_VALUE;
}
if (!S_ISCHR(deviceStat.st_mode))
{
CommLog_Print(WLOG_WARN, "bad device %s", devicePath);
SetLastError(ERROR_BAD_DEVICE);
return INVALID_HANDLE_VALUE;
}
if (dwFlagsAndAttributes != 0)
{
CommLog_Print(WLOG_WARN, "unexpected flags and attributes: 0x%lX", dwFlagsAndAttributes);
}
if (hTemplateFile != NULL)
{
SetLastError(ERROR_NOT_SUPPORTED); /* FIXME: other proper error? */
return INVALID_HANDLE_VALUE;
}
pComm = (WINPR_COMM*) calloc(1, sizeof(WINPR_COMM));
if (pComm == NULL)
{
SetLastError(ERROR_OUTOFMEMORY);
return INVALID_HANDLE_VALUE;
}
WINPR_HANDLE_SET_TYPE(pComm, HANDLE_TYPE_COMM);
pComm->ops = &ops;
/* error_handle */
pComm->fd = open(devicePath, O_RDWR | O_NOCTTY | O_NONBLOCK);
if (pComm->fd < 0)
{
CommLog_Print(WLOG_WARN, "failed to open device %s", devicePath);
SetLastError(ERROR_BAD_DEVICE);
goto error_handle;
}
pComm->fd_read = open(devicePath, O_RDONLY | O_NOCTTY | O_NONBLOCK);
if (pComm->fd_read < 0)
{
CommLog_Print(WLOG_WARN, "failed to open fd_read, device: %s", devicePath);
SetLastError(ERROR_BAD_DEVICE);
goto error_handle;
}
pComm->fd_read_event = eventfd(0, EFD_NONBLOCK); /* EFD_NONBLOCK required because a read() is not always expected */
if (pComm->fd_read_event < 0)
{
CommLog_Print(WLOG_WARN, "failed to open fd_read_event, device: %s", devicePath);
SetLastError(ERROR_BAD_DEVICE);
goto error_handle;
}
InitializeCriticalSection(&pComm->ReadLock);
pComm->fd_write = open(devicePath, O_WRONLY | O_NOCTTY | O_NONBLOCK);
if (pComm->fd_write < 0)
{
CommLog_Print(WLOG_WARN, "failed to open fd_write, device: %s", devicePath);
SetLastError(ERROR_BAD_DEVICE);
goto error_handle;
}
pComm->fd_write_event = eventfd(0, EFD_NONBLOCK); /* EFD_NONBLOCK required because a read() is not always expected */
if (pComm->fd_write_event < 0)
{
CommLog_Print(WLOG_WARN, "failed to open fd_write_event, device: %s", devicePath);
SetLastError(ERROR_BAD_DEVICE);
goto error_handle;
}
InitializeCriticalSection(&pComm->WriteLock);
/* can also be setup later on with _comm_setServerSerialDriver() */
pComm->serverSerialDriverId = SerialDriverUnknown;
InitializeCriticalSection(&pComm->EventsLock);
if (ioctl(pComm->fd, TIOCGICOUNT, &(pComm->counters)) < 0)
{
CommLog_Print(WLOG_WARN, "TIOCGICOUNT ioctl failed, errno=[%d] %s.", errno, strerror(errno));
CommLog_Print(WLOG_WARN, "could not read counters.");
/* could not initialize counters but keep on.
*
* Not all drivers, especially for USB to serial
* adapters (e.g. those based on pl2303), does support
* this call.
*/
ZeroMemory(&(pComm->counters), sizeof(struct serial_icounter_struct));
}
/* The binary/raw mode is required for the redirection but
* only flags that are not handle somewhere-else, except
* ICANON, are forced here. */
ZeroMemory(&upcomingTermios, sizeof(struct termios));
if (tcgetattr(pComm->fd, &upcomingTermios) < 0)
{
SetLastError(ERROR_IO_DEVICE);
goto error_handle;
}
upcomingTermios.c_iflag &= ~(/*IGNBRK |*/ BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL /*| IXON*/);
upcomingTermios.c_oflag = 0; /* <=> &= ~OPOST */
upcomingTermios.c_lflag = 0; /* <=> &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN); */
/* upcomingTermios.c_cflag &= ~(CSIZE | PARENB); */
/* upcomingTermios.c_cflag |= CS8; */
/* About missing flags recommended by termios(3):
*
* IGNBRK and IXON, see: IOCTL_SERIAL_SET_HANDFLOW
* CSIZE, PARENB and CS8, see: IOCTL_SERIAL_SET_LINE_CONTROL
*/
/* a few more settings required for the redirection */
upcomingTermios.c_cflag |= CLOCAL | CREAD;
if (_comm_ioctl_tcsetattr(pComm->fd, TCSANOW, &upcomingTermios) < 0)
{
SetLastError(ERROR_IO_DEVICE);
goto error_handle;
}
return (HANDLE)pComm;
error_handle:
if (pComm != NULL)
{
CloseHandle(pComm);
}
return INVALID_HANDLE_VALUE;
}
static BOOL _set_handflow(WINPR_COMM *pComm, const SERIAL_HANDFLOW *pHandflow)
{
BOOL result = TRUE;
struct termios upcomingTermios;
ZeroMemory(&upcomingTermios, sizeof(struct termios));
if (tcgetattr(pComm->fd, &upcomingTermios) < 0)
{
SetLastError(ERROR_IO_DEVICE);
return FALSE;
}
/* HUPCL */
/* logical XOR */
if ((!(pHandflow->ControlHandShake & SERIAL_DTR_CONTROL) && (pHandflow->FlowReplace & SERIAL_RTS_CONTROL)) ||
((pHandflow->ControlHandShake & SERIAL_DTR_CONTROL) && !(pHandflow->FlowReplace & SERIAL_RTS_CONTROL)))
{
CommLog_Print(WLOG_WARN, "SERIAL_DTR_CONTROL:%s and SERIAL_RTS_CONTROL:%s cannot be different, HUPCL will be set since it is claimed for one of the both lines.",
(pHandflow->ControlHandShake & SERIAL_DTR_CONTROL) ? "ON" : "OFF",
(pHandflow->FlowReplace & SERIAL_RTS_CONTROL) ? "ON" : "OFF");
}
if ((pHandflow->ControlHandShake & SERIAL_DTR_CONTROL) || (pHandflow->FlowReplace & SERIAL_RTS_CONTROL))
{
upcomingTermios.c_cflag |= HUPCL;
}
else
{
upcomingTermios.c_cflag &= ~HUPCL;
/* FIXME: is the DTR line also needs to be forced to a disable state according SERIAL_DTR_CONTROL? */
/* FIXME: is the RTS line also needs to be forced to a disable state according SERIAL_RTS_CONTROL? */
}
/* CRTSCTS */
/* logical XOR */
if ((!(pHandflow->ControlHandShake & SERIAL_CTS_HANDSHAKE) && (pHandflow->FlowReplace & SERIAL_RTS_HANDSHAKE)) ||
((pHandflow->ControlHandShake & SERIAL_CTS_HANDSHAKE) && !(pHandflow->FlowReplace & SERIAL_RTS_HANDSHAKE)))
{
CommLog_Print(WLOG_WARN, "SERIAL_CTS_HANDSHAKE:%s and SERIAL_RTS_HANDSHAKE:%s cannot be different, CRTSCTS will be set since it is claimed for one of the both lines.",
(pHandflow->ControlHandShake & SERIAL_CTS_HANDSHAKE) ? "ON" : "OFF",
(pHandflow->FlowReplace & SERIAL_RTS_HANDSHAKE) ? "ON" : "OFF");
}
if ((pHandflow->ControlHandShake & SERIAL_CTS_HANDSHAKE) || (pHandflow->FlowReplace & SERIAL_RTS_HANDSHAKE))
{
upcomingTermios.c_cflag |= CRTSCTS;
}
else
{
upcomingTermios.c_cflag &= ~CRTSCTS;
}
/* ControlHandShake */
if (pHandflow->ControlHandShake & SERIAL_DTR_HANDSHAKE)
{
/* DTR/DSR flow control not supported on Linux */
CommLog_Print(WLOG_WARN, "Attempt to use the unsupported SERIAL_DTR_HANDSHAKE feature.");
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
if (pHandflow->ControlHandShake & SERIAL_DSR_HANDSHAKE)
{
/* DTR/DSR flow control not supported on Linux */
CommLog_Print(WLOG_WARN, "Attempt to use the unsupported SERIAL_DSR_HANDSHAKE feature.");
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
if (pHandflow->ControlHandShake & SERIAL_DCD_HANDSHAKE)
{
/* DCD flow control not supported on Linux */
CommLog_Print(WLOG_WARN, "Attempt to use the unsupported SERIAL_DCD_HANDSHAKE feature.");
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
// FIXME: could be implemented during read/write I/O
if (pHandflow->ControlHandShake & SERIAL_DSR_SENSITIVITY)
{
/* DSR line control not supported on Linux */
CommLog_Print(WLOG_WARN, "Attempt to use the unsupported SERIAL_DSR_SENSITIVITY feature.");
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
// FIXME: could be implemented during read/write I/O
if (pHandflow->ControlHandShake & SERIAL_ERROR_ABORT)
{
/* Aborting operations on error not supported on Linux */
CommLog_Print(WLOG_WARN, "Attempt to use the unsupported SERIAL_ERROR_ABORT feature.");
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
/* FlowReplace */
if (pHandflow->FlowReplace & SERIAL_AUTO_TRANSMIT)
{
upcomingTermios.c_iflag |= IXON;
}
else
{
upcomingTermios.c_iflag &= ~IXON;
}
if (pHandflow->FlowReplace & SERIAL_AUTO_RECEIVE)
{
upcomingTermios.c_iflag |= IXOFF;
}
else
{
upcomingTermios.c_iflag &= ~IXOFF;
}
// FIXME: could be implemented during read/write I/O, as of today ErrorChar is necessary '\0'
if (pHandflow->FlowReplace & SERIAL_ERROR_CHAR)
{
/* errors will be replaced by the character '\0'. */
upcomingTermios.c_iflag &= ~IGNPAR;
}
else
{
upcomingTermios.c_iflag |= IGNPAR;
}
if (pHandflow->FlowReplace & SERIAL_NULL_STRIPPING)
{
upcomingTermios.c_iflag |= IGNBRK;
}
else
{
upcomingTermios.c_iflag &= ~IGNBRK;
}
// FIXME: could be implemented during read/write I/O
if (pHandflow->FlowReplace & SERIAL_BREAK_CHAR)
{
CommLog_Print(WLOG_WARN, "Attempt to use the unsupported SERIAL_BREAK_CHAR feature.");
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
// FIXME: could be implemented during read/write I/O
if (pHandflow->FlowReplace & SERIAL_XOFF_CONTINUE)
{
/* not supported on Linux */
CommLog_Print(WLOG_WARN, "Attempt to use the unsupported SERIAL_XOFF_CONTINUE feature.");
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
/* XonLimit */
// FIXME: could be implemented during read/write I/O
if (pHandflow->XonLimit != TTY_THRESHOLD_UNTHROTTLE)
{
CommLog_Print(WLOG_WARN, "Attempt to set XonLimit with an unsupported value: %"PRId32"", pHandflow->XonLimit);
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
/* XoffChar */
// FIXME: could be implemented during read/write I/O
if (pHandflow->XoffLimit != TTY_THRESHOLD_THROTTLE)
{
CommLog_Print(WLOG_WARN, "Attempt to set XoffLimit with an unsupported value: %"PRId32"", pHandflow->XoffLimit);
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
if (_comm_ioctl_tcsetattr(pComm->fd, TCSANOW, &upcomingTermios) < 0)
{
CommLog_Print(WLOG_WARN, "_comm_ioctl_tcsetattr failure: last-error: 0x%"PRIX32"", GetLastError());
return FALSE;
}
return result;
}
static BOOL _set_line_control(WINPR_COMM *pComm, const SERIAL_LINE_CONTROL *pLineControl)
{
BOOL result = TRUE;
struct termios upcomingTermios;
/* http://msdn.microsoft.com/en-us/library/windows/desktop/aa363214%28v=vs.85%29.aspx
*
* The use of 5 data bits with 2 stop bits is an invalid
* combination, as is 6, 7, or 8 data bits with 1.5 stop bits.
*
* FIXME: prefered to let the underlying driver to deal with
* this issue. At least produce a warning message?
*/
ZeroMemory(&upcomingTermios, sizeof(struct termios));
if (tcgetattr(pComm->fd, &upcomingTermios) < 0)
{
SetLastError(ERROR_IO_DEVICE);
return FALSE;
}
/* FIXME: use of a COMMPROP to validate new settings? */
switch (pLineControl->StopBits)
{
case STOP_BIT_1:
upcomingTermios.c_cflag &= ~CSTOPB;
break;
case STOP_BITS_1_5:
CommLog_Print(WLOG_WARN, "Unsupported one and a half stop bits.");
break;
case STOP_BITS_2:
upcomingTermios.c_cflag |= CSTOPB;
break;
default:
CommLog_Print(WLOG_WARN, "unexpected number of stop bits: %"PRIu8"\n", pLineControl->StopBits);
result = FALSE; /* but keep on */
break;
}
switch (pLineControl->Parity)
{
case NO_PARITY:
upcomingTermios.c_cflag &= ~(PARENB | PARODD | CMSPAR);
break;
case ODD_PARITY:
upcomingTermios.c_cflag &= ~CMSPAR;
upcomingTermios.c_cflag |= PARENB | PARODD;
break;
case EVEN_PARITY:
upcomingTermios.c_cflag &= ~(PARODD | CMSPAR);
upcomingTermios.c_cflag |= PARENB;
break;
case MARK_PARITY:
upcomingTermios.c_cflag |= PARENB | PARODD | CMSPAR;
break;
case SPACE_PARITY:
upcomingTermios.c_cflag &= ~PARODD;
upcomingTermios.c_cflag |= PARENB | CMSPAR;
break;
default:
CommLog_Print(WLOG_WARN, "unexpected type of parity: %"PRIu8"\n", pLineControl->Parity);
result = FALSE; /* but keep on */
break;
}
switch (pLineControl->WordLength)
{
case 5:
upcomingTermios.c_cflag &= ~CSIZE;
upcomingTermios.c_cflag |= CS5;
break;
case 6:
upcomingTermios.c_cflag &= ~CSIZE;
upcomingTermios.c_cflag |= CS6;
break;
case 7:
upcomingTermios.c_cflag &= ~CSIZE;
upcomingTermios.c_cflag |= CS7;
break;
case 8:
upcomingTermios.c_cflag &= ~CSIZE;
upcomingTermios.c_cflag |= CS8;
break;
default:
CommLog_Print(WLOG_WARN, "unexpected number od data bits per character: %"PRIu8"\n", pLineControl->WordLength);
result = FALSE; /* but keep on */
break;
}
if (_comm_ioctl_tcsetattr(pComm->fd, TCSANOW, &upcomingTermios) < 0)
{
CommLog_Print(WLOG_WARN, "_comm_ioctl_tcsetattr failure: last-error: 0x%08"PRIX32"", GetLastError());
return FALSE;
}
return result;
}
/**
* NOTE: Only XonChar and XoffChar are plenty supported with the Linux
* N_TTY line discipline.
*
* ERRORS:
* ERROR_IO_DEVICE
* ERROR_INVALID_PARAMETER when Xon and Xoff chars are the same;
* ERROR_NOT_SUPPORTED
*/
static BOOL _set_serial_chars(WINPR_COMM *pComm, const SERIAL_CHARS *pSerialChars)
{
BOOL result = TRUE;
struct termios upcomingTermios;
ZeroMemory(&upcomingTermios, sizeof(struct termios));
if (tcgetattr(pComm->fd, &upcomingTermios) < 0)
{
SetLastError(ERROR_IO_DEVICE);
return FALSE;
}
if (pSerialChars->XonChar == pSerialChars->XoffChar)
{
/* https://msdn.microsoft.com/en-us/library/windows/hardware/ff546688?v=vs.85.aspx */
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* termios(3): (..) above symbolic subscript values are all
* different, except that VTIME, VMIN may have the same value
* as VEOL, VEOF, respectively. In noncanonical mode the
* special character meaning is replaced by the timeout
* meaning.
*
* EofChar and c_cc[VEOF] are not quite the same, prefer to
* don't use c_cc[VEOF] at all.
*
* FIXME: might be implemented during read/write I/O
*/
if (pSerialChars->EofChar != '\0')
{
CommLog_Print(WLOG_WARN, "EofChar %02"PRIX8" cannot be set\n", pSerialChars->EofChar);
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
/* According the Linux's n_tty discipline, charaters with a
* parity error can only be let unchanged, replaced by \0 or
* get the prefix the prefix \377 \0
*/
/* FIXME: see also: _set_handflow() */
if (pSerialChars->ErrorChar != '\0')
{
CommLog_Print(WLOG_WARN, "ErrorChar 0x%02"PRIX8" ('%c') cannot be set (unsupported).\n", pSerialChars->ErrorChar, (char) pSerialChars->ErrorChar);
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
/* FIXME: see also: _set_handflow() */
if (pSerialChars->BreakChar != '\0')
{
CommLog_Print(WLOG_WARN, "BreakChar 0x%02"PRIX8" ('%c') cannot be set (unsupported).\n", pSerialChars->BreakChar, (char) pSerialChars->BreakChar);
SetLastError(ERROR_NOT_SUPPORTED);
result = FALSE; /* but keep on */
}
if (pSerialChars->EventChar != '\0')
{
pComm->eventChar = pSerialChars->EventChar;
}
upcomingTermios.c_cc[VSTART] = pSerialChars->XonChar;
upcomingTermios.c_cc[VSTOP] = pSerialChars->XoffChar;
if (_comm_ioctl_tcsetattr(pComm->fd, TCSANOW, &upcomingTermios) < 0)
{
CommLog_Print(WLOG_WARN, "_comm_ioctl_tcsetattr failure: last-error: 0x%08"PRIX32"", GetLastError());
return FALSE;
}
return result;
}
