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rdpdr/serial: [fix] ignore purge of port buffers

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See http://msdn.microsoft.com/en-us/library/ms901431.aspx
This commit is contained in:
Eduardo Beloni 2011-10-19 17:03:49 -02:00
parent b8c865fa9f
commit 0d421ac6f7
1 changed files with 14 additions and 7 deletions
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21
channels/rdpdr/serial/serial_tty.c
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@ -295,13 +295,20 @@ uint32 serial_tty_control(SERIAL_TTY* tty, uint32 IoControlCode, STREAM* input,
case IOCTL_SERIAL_PURGE:
stream_read_uint32(input, purge_mask);
DEBUG_SVC("SERIAL_PURGE purge_mask %X", purge_mask);
if ((purge_mask & SERIAL_PURGE_TXCLEAR)
&& (purge_mask & SERIAL_PURGE_RXCLEAR))
tcflush(tty->fd, TCIOFLUSH);
else if (purge_mask & SERIAL_PURGE_TXCLEAR)
tcflush(tty->fd, TCOFLUSH);
else if (purge_mask & SERIAL_PURGE_RXCLEAR)
tcflush(tty->fd, TCIFLUSH);
/* See http://msdn.microsoft.com/en-us/library/ms901431.aspx
PURGE_TXCLEAR Clears the output buffer, if the driver has one.
PURGE_RXCLEAR Clears the input buffer, if the driver has one.
It clearly states to clear the *driver* buffer, not the port buffer
*/
#ifdef DEBUG_SVC
if (purge_mask & SERIAL_PURGE_TXCLEAR)
DEBUG_SVC("Ignoring SERIAL_PURGE_TXCLEAR");
if (purge_mask & SERIAL_PURGE_RXCLEAR)
DEBUG_SVC("Ignoring SERIAL_PURGE_RXCLEAR");
#endif
if (purge_mask & SERIAL_PURGE_TXABORT)
*abort_io |= SERIAL_ABORT_IO_WRITE;