2014-05-12 19:33:56 +04:00
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/**
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* WinPR: Windows Portable Runtime
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* Serial Communication API
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*
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* Copyright 2014 Hewlett-Packard Development Company, L.P.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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2022-02-16 12:08:00 +03:00
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#include <winpr/config.h>
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2014-05-12 19:33:56 +04:00
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2014-07-04 19:40:06 +04:00
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#if defined __linux__ && !defined ANDROID
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2014-05-12 19:33:56 +04:00
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2021-06-09 15:03:34 +03:00
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#include <winpr/assert.h>
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2014-05-12 19:33:56 +04:00
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#include <errno.h>
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#include <termios.h>
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#include <unistd.h>
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#include <winpr/io.h>
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2014-07-02 17:59:16 +04:00
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#include <winpr/wlog.h>
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2014-05-12 19:33:56 +04:00
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#include <winpr/wtypes.h>
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#include "comm.h"
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2014-05-19 18:53:57 +04:00
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BOOL _comm_set_permissive(HANDLE hDevice, BOOL permissive)
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{
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2019-11-06 17:24:51 +03:00
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WINPR_COMM* pComm = (WINPR_COMM*)hDevice;
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2014-05-19 18:53:57 +04:00
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2022-04-27 16:56:39 +03:00
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if (!CommIsHandled(hDevice))
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2016-10-07 15:04:40 +03:00
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return FALSE;
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2014-05-19 18:53:57 +04:00
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pComm->permissive = permissive;
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return TRUE;
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}
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2015-02-03 23:16:29 +03:00
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/* Computes VTIME in deciseconds from Ti in milliseconds */
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2014-05-29 00:11:19 +04:00
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static UCHAR _vtime(ULONG Ti)
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2014-05-12 19:33:56 +04:00
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{
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/* FIXME: look for an equivalent math function otherwise let
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* do the compiler do the optimization */
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2014-05-29 00:11:19 +04:00
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if (Ti == 0)
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2014-05-12 19:33:56 +04:00
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return 0;
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2014-05-29 00:11:19 +04:00
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else if (Ti < 100)
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2014-05-12 19:33:56 +04:00
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return 1;
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2014-05-29 00:11:19 +04:00
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else if (Ti > 25500)
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2014-05-12 19:33:56 +04:00
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return 255; /* 0xFF */
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else
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2016-10-07 15:04:40 +03:00
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return Ti / 100;
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2014-05-12 19:33:56 +04:00
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}
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/**
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* ERRORS:
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* ERROR_INVALID_HANDLE
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* ERROR_NOT_SUPPORTED
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* ERROR_INVALID_PARAMETER
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* ERROR_TIMEOUT
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* ERROR_IO_DEVICE
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* ERROR_BAD_DEVICE
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*/
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BOOL CommReadFile(HANDLE hDevice, LPVOID lpBuffer, DWORD nNumberOfBytesToRead,
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2016-10-07 15:04:40 +03:00
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LPDWORD lpNumberOfBytesRead, LPOVERLAPPED lpOverlapped)
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2014-05-12 19:33:56 +04:00
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{
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2019-11-06 17:24:51 +03:00
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WINPR_COMM* pComm = (WINPR_COMM*)hDevice;
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2014-05-28 20:42:23 +04:00
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int biggestFd = -1;
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fd_set read_set;
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2024-01-23 18:49:54 +03:00
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int nbFds = 0;
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COMMTIMEOUTS* pTimeouts = NULL;
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2014-05-12 19:33:56 +04:00
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UCHAR vmin = 0;
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UCHAR vtime = 0;
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2014-05-29 00:11:19 +04:00
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ULONGLONG Tmax = 0;
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2024-01-23 18:49:54 +03:00
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struct timeval tmaxTimeout;
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2024-01-23 18:49:54 +03:00
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struct timeval* pTmaxTimeout = NULL;
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2014-05-12 19:33:56 +04:00
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struct termios currentTermios;
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2014-06-17 18:34:20 +04:00
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EnterCriticalSection(&pComm->ReadLock); /* KISSer by the function's beginning */
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2022-04-27 16:56:39 +03:00
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if (!CommIsHandled(hDevice))
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2014-06-17 18:34:20 +04:00
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goto return_false;
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2014-05-12 19:33:56 +04:00
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if (lpOverlapped != NULL)
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{
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SetLastError(ERROR_NOT_SUPPORTED);
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2014-06-17 18:34:20 +04:00
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goto return_false;
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2014-05-12 19:33:56 +04:00
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}
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if (lpNumberOfBytesRead == NULL)
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{
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2019-11-06 17:24:51 +03:00
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SetLastError(ERROR_INVALID_PARAMETER); /* since we doesn't suppport lpOverlapped != NULL */
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2014-06-17 18:34:20 +04:00
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goto return_false;
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2014-05-12 19:33:56 +04:00
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}
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*lpNumberOfBytesRead = 0; /* will be ajusted if required ... */
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if (nNumberOfBytesToRead <= 0) /* N */
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{
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2014-06-17 18:34:20 +04:00
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goto return_true; /* FIXME: or FALSE? */
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2014-05-12 19:33:56 +04:00
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}
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if (tcgetattr(pComm->fd, ¤tTermios) < 0)
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{
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SetLastError(ERROR_IO_DEVICE);
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2014-06-17 18:34:20 +04:00
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goto return_false;
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2014-05-12 19:33:56 +04:00
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}
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if (currentTermios.c_lflag & ICANON)
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{
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2019-11-06 17:24:51 +03:00
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CommLog_Print(WLOG_WARN, "Canonical mode not supported"); /* the timeout could not be set */
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2014-05-12 19:33:56 +04:00
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SetLastError(ERROR_NOT_SUPPORTED);
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2014-06-17 18:34:20 +04:00
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goto return_false;
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2014-05-12 19:33:56 +04:00
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}
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/* http://msdn.microsoft.com/en-us/library/hh439614%28v=vs.85%29.aspx
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* http://msdn.microsoft.com/en-us/library/windows/hardware/hh439614%28v=vs.85%29.aspx
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*
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2019-11-06 17:24:51 +03:00
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* ReadIntervalTimeout | ReadTotalTimeoutMultiplier | ReadTotalTimeoutConstant | VMIN | VTIME |
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* TMAX | 0 | 0 | 0 | N | 0 |
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* INDEF | Blocks for N bytes available. 0< Ti <MAXULONG | 0 | 0 |
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* N | Ti | INDEF | Blocks on first byte, then use Ti between bytes. MAXULONG | 0 | 0
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* | 0 | 0 | 0 | Returns immediately with bytes available (don't block) MAXULONG |
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* MAXULONG | 0< Tc <MAXULONG | N | 0 | Tc | Blocks on first byte
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* during Tc or returns immediately whith bytes available MAXULONG | m |
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* MAXULONG | | Invalid 0 | m | 0< Tc
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* <MAXULONG | N | 0 | Tmax | Blocks on first byte during Tmax or returns
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* immediately whith bytes available 0< Ti <MAXULONG | m | 0<
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* Tc <MAXULONG | N | Ti | Tmax | Blocks on first byte, then use Ti between bytes.
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* Tmax is used for the whole system call.
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2014-05-12 19:33:56 +04:00
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*/
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2014-05-29 00:11:19 +04:00
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/* NB: timeouts are in milliseconds, VTIME are in deciseconds and is an unsigned char */
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2019-11-06 17:24:51 +03:00
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/* FIXME: double check whether open(pComm->fd_read_event, O_NONBLOCK) doesn't conflict with
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* above use cases */
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2014-05-12 19:33:56 +04:00
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pTimeouts = &(pComm->timeouts);
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2019-11-06 17:24:51 +03:00
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if ((pTimeouts->ReadIntervalTimeout == MAXULONG) &&
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(pTimeouts->ReadTotalTimeoutConstant == MAXULONG))
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2014-05-12 19:33:56 +04:00
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{
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2019-11-06 17:24:51 +03:00
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CommLog_Print(
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WLOG_WARN,
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"ReadIntervalTimeout and ReadTotalTimeoutConstant cannot be both set to MAXULONG");
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2014-05-12 19:33:56 +04:00
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SetLastError(ERROR_INVALID_PARAMETER);
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2014-06-17 18:34:20 +04:00
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goto return_false;
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2014-05-12 19:33:56 +04:00
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}
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/* VMIN */
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2019-11-06 17:24:51 +03:00
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if ((pTimeouts->ReadIntervalTimeout == MAXULONG) &&
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(pTimeouts->ReadTotalTimeoutMultiplier == 0) && (pTimeouts->ReadTotalTimeoutConstant == 0))
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2014-05-29 00:11:19 +04:00
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{
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vmin = 0;
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}
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else
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2014-05-12 19:33:56 +04:00
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{
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2014-05-29 00:11:19 +04:00
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/* N */
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/* vmin = nNumberOfBytesToRead < 256 ? nNumberOfBytesToRead : 255;*/ /* 0xFF */
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/* NB: we might wait endlessly with vmin=N, prefer to
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* force vmin=1 and return with bytes
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2014-06-16 21:18:45 +04:00
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* available. FIXME: is a feature disarded here? */
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2014-05-29 00:11:19 +04:00
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vmin = 1;
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2014-05-12 19:33:56 +04:00
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}
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2014-06-16 21:18:45 +04:00
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2014-05-12 19:33:56 +04:00
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/* VTIME */
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2019-11-06 17:24:51 +03:00
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if ((pTimeouts->ReadIntervalTimeout > 0) && (pTimeouts->ReadIntervalTimeout < MAXULONG))
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2014-05-12 19:33:56 +04:00
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{
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/* Ti */
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2014-05-29 00:11:19 +04:00
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vtime = _vtime(pTimeouts->ReadIntervalTimeout);
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2014-05-12 19:33:56 +04:00
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}
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2014-05-29 00:11:19 +04:00
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/* TMAX */
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2016-10-07 15:04:40 +03:00
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pTmaxTimeout = &tmaxTimeout;
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2014-06-16 21:18:45 +04:00
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2019-11-06 17:24:51 +03:00
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if ((pTimeouts->ReadIntervalTimeout == MAXULONG) &&
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(pTimeouts->ReadTotalTimeoutMultiplier == MAXULONG))
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2014-05-12 19:33:56 +04:00
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{
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/* Tc */
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2014-05-29 00:11:19 +04:00
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Tmax = pTimeouts->ReadTotalTimeoutConstant;
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2014-05-12 19:33:56 +04:00
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}
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2014-05-29 00:11:19 +04:00
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else
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2014-05-12 19:33:56 +04:00
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{
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2014-05-29 00:11:19 +04:00
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/* Tmax */
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2024-04-15 11:11:50 +03:00
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Tmax = 1ull * nNumberOfBytesToRead * pTimeouts->ReadTotalTimeoutMultiplier +
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1ull * pTimeouts->ReadTotalTimeoutConstant;
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2015-03-09 22:01:51 +03:00
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/* INDEFinitely */
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2019-11-06 17:24:51 +03:00
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if ((Tmax == 0) && (pTimeouts->ReadIntervalTimeout < MAXULONG) &&
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(pTimeouts->ReadTotalTimeoutMultiplier == 0))
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2015-03-09 22:01:51 +03:00
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pTmaxTimeout = NULL;
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2014-05-12 19:33:56 +04:00
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}
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2014-06-16 21:18:45 +04:00
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2019-11-06 17:24:51 +03:00
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if ((currentTermios.c_cc[VMIN] != vmin) || (currentTermios.c_cc[VTIME] != vtime))
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2014-05-12 19:33:56 +04:00
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{
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2019-11-06 17:24:51 +03:00
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currentTermios.c_cc[VMIN] = vmin;
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2014-05-12 19:33:56 +04:00
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currentTermios.c_cc[VTIME] = vtime;
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if (tcsetattr(pComm->fd, TCSANOW, ¤tTermios) < 0)
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{
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2016-10-07 15:04:40 +03:00
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CommLog_Print(WLOG_WARN,
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2019-11-06 17:24:51 +03:00
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"CommReadFile failure, could not apply new timeout values: VMIN=%" PRIu8
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", VTIME=%" PRIu8 "",
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2016-10-07 15:04:40 +03:00
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vmin, vtime);
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2014-05-12 19:33:56 +04:00
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SetLastError(ERROR_IO_DEVICE);
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2014-06-17 18:34:20 +04:00
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goto return_false;
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2014-05-12 19:33:56 +04:00
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}
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}
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2016-10-07 15:04:40 +03:00
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/* wait indefinitely if pTmaxTimeout is NULL */
|
2015-03-09 22:01:51 +03:00
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|
2016-10-07 15:04:40 +03:00
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if (pTmaxTimeout != NULL)
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2014-05-29 00:11:19 +04:00
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{
|
2016-10-07 15:04:40 +03:00
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ZeroMemory(pTmaxTimeout, sizeof(struct timeval));
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2014-05-29 00:11:19 +04:00
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2016-10-07 15:04:40 +03:00
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if (Tmax > 0) /* return immdiately if Tmax == 0 */
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{
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2019-11-06 17:24:51 +03:00
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pTmaxTimeout->tv_sec = Tmax / 1000; /* s */
|
2016-10-07 15:04:40 +03:00
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pTmaxTimeout->tv_usec = (Tmax % 1000) * 1000; /* us */
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}
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}
|
2014-05-29 00:11:19 +04:00
|
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|
2014-05-28 22:15:08 +04:00
|
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/* FIXME: had expected eventfd_write() to return EAGAIN when
|
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* there is no eventfd_read() but this not the case. */
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/* discard a possible and no more relevant event */
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eventfd_read(pComm->fd_read_event, NULL);
|
2014-05-28 20:42:23 +04:00
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biggestFd = pComm->fd_read;
|
2016-10-07 15:04:40 +03:00
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|
2014-05-28 20:42:23 +04:00
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if (pComm->fd_read_event > biggestFd)
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biggestFd = pComm->fd_read_event;
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FD_ZERO(&read_set);
|
2021-06-09 15:03:34 +03:00
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WINPR_ASSERT(pComm->fd_read_event < FD_SETSIZE);
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WINPR_ASSERT(pComm->fd_read < FD_SETSIZE);
|
2014-05-28 20:42:23 +04:00
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FD_SET(pComm->fd_read_event, &read_set);
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FD_SET(pComm->fd_read, &read_set);
|
2016-10-07 15:04:40 +03:00
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nbFds = select(biggestFd + 1, &read_set, NULL, NULL, pTmaxTimeout);
|
2014-05-28 20:42:23 +04:00
|
|
|
|
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|
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if (nbFds < 0)
|
2014-05-12 19:33:56 +04:00
|
|
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{
|
2024-02-05 15:01:08 +03:00
|
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char ebuffer[256] = { 0 };
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CommLog_Print(WLOG_WARN, "select() failure, errno=[%d] %s\n", errno,
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winpr_strerror(errno, ebuffer, sizeof(ebuffer)));
|
2014-05-28 20:42:23 +04:00
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SetLastError(ERROR_IO_DEVICE);
|
2014-06-17 18:34:20 +04:00
|
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goto return_false;
|
2014-05-28 20:42:23 +04:00
|
|
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}
|
2014-06-16 21:18:45 +04:00
|
|
|
|
2014-05-28 20:42:23 +04:00
|
|
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if (nbFds == 0)
|
|
|
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{
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|
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/* timeout */
|
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|
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SetLastError(ERROR_TIMEOUT);
|
2014-06-17 18:34:20 +04:00
|
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goto return_false;
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* read_set */
|
|
|
|
|
|
|
|
if (FD_ISSET(pComm->fd_read_event, &read_set))
|
|
|
|
{
|
|
|
|
eventfd_t event = 0;
|
|
|
|
|
2014-05-28 21:10:01 +04:00
|
|
|
if (eventfd_read(pComm->fd_read_event, &event) < 0)
|
2014-05-28 20:42:23 +04:00
|
|
|
{
|
|
|
|
if (errno == EAGAIN)
|
|
|
|
{
|
2021-06-09 15:03:34 +03:00
|
|
|
WINPR_ASSERT(FALSE); /* not quite sure this should ever happen */
|
|
|
|
/* keep on */
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2024-02-05 15:01:08 +03:00
|
|
|
char ebuffer[256] = { 0 };
|
2016-10-07 15:04:40 +03:00
|
|
|
CommLog_Print(WLOG_WARN,
|
|
|
|
"unexpected error on reading fd_read_event, errno=[%d] %s\n", errno,
|
2024-02-05 15:01:08 +03:00
|
|
|
winpr_strerror(errno, ebuffer, sizeof(ebuffer)));
|
2014-06-17 18:34:20 +04:00
|
|
|
/* FIXME: goto return_false ? */
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
|
|
|
|
2021-06-09 15:03:34 +03:00
|
|
|
WINPR_ASSERT(errno == EAGAIN);
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
2014-05-12 19:33:56 +04:00
|
|
|
|
2021-06-16 15:43:07 +03:00
|
|
|
if (event == WINPR_PURGE_RXABORT)
|
2014-05-28 20:42:23 +04:00
|
|
|
{
|
|
|
|
SetLastError(ERROR_CANCELLED);
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
|
|
|
|
2021-06-16 15:43:07 +03:00
|
|
|
WINPR_ASSERT(event == WINPR_PURGE_RXABORT); /* no other expected event so far */
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
if (FD_ISSET(pComm->fd_read, &read_set))
|
|
|
|
{
|
2014-05-28 22:15:08 +04:00
|
|
|
ssize_t nbRead = 0;
|
2014-05-28 20:42:23 +04:00
|
|
|
nbRead = read(pComm->fd_read, lpBuffer, nNumberOfBytesToRead);
|
2016-10-07 15:04:40 +03:00
|
|
|
|
2014-05-28 20:42:23 +04:00
|
|
|
if (nbRead < 0)
|
2014-05-12 19:33:56 +04:00
|
|
|
{
|
2024-02-05 15:01:08 +03:00
|
|
|
char ebuffer[256] = { 0 };
|
2016-10-07 15:04:40 +03:00
|
|
|
CommLog_Print(WLOG_WARN,
|
2019-11-06 17:24:51 +03:00
|
|
|
"CommReadFile failed, ReadIntervalTimeout=%" PRIu32
|
|
|
|
", ReadTotalTimeoutMultiplier=%" PRIu32
|
|
|
|
", ReadTotalTimeoutConstant=%" PRIu32 " VMIN=%u, VTIME=%u",
|
2016-10-07 15:04:40 +03:00
|
|
|
pTimeouts->ReadIntervalTimeout, pTimeouts->ReadTotalTimeoutMultiplier,
|
2019-11-06 17:24:51 +03:00
|
|
|
pTimeouts->ReadTotalTimeoutConstant, currentTermios.c_cc[VMIN],
|
|
|
|
currentTermios.c_cc[VTIME]);
|
2024-02-05 15:01:08 +03:00
|
|
|
CommLog_Print(
|
|
|
|
WLOG_WARN, "CommReadFile failed, nNumberOfBytesToRead=%" PRIu32 ", errno=[%d] %s",
|
|
|
|
nNumberOfBytesToRead, errno, winpr_strerror(errno, ebuffer, sizeof(ebuffer)));
|
2014-05-12 19:33:56 +04:00
|
|
|
|
2014-05-28 20:42:23 +04:00
|
|
|
if (errno == EAGAIN)
|
|
|
|
{
|
|
|
|
/* keep on */
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_true; /* expect a read-loop to be implemented on the server side */
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
|
|
|
else if (errno == EBADF)
|
|
|
|
{
|
2014-05-12 19:33:56 +04:00
|
|
|
SetLastError(ERROR_BAD_DEVICE); /* STATUS_INVALID_DEVICE_REQUEST */
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2021-06-09 15:03:34 +03:00
|
|
|
WINPR_ASSERT(FALSE);
|
2014-05-28 20:42:23 +04:00
|
|
|
SetLastError(ERROR_IO_DEVICE);
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
2014-05-12 19:33:56 +04:00
|
|
|
}
|
|
|
|
|
2014-05-28 20:42:23 +04:00
|
|
|
if (nbRead == 0)
|
|
|
|
{
|
|
|
|
/* termios timeout */
|
|
|
|
SetLastError(ERROR_TIMEOUT);
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
2014-06-16 21:18:45 +04:00
|
|
|
|
2014-05-28 20:42:23 +04:00
|
|
|
*lpNumberOfBytesRead = nbRead;
|
2017-11-07 00:23:07 +03:00
|
|
|
|
|
|
|
EnterCriticalSection(&pComm->EventsLock);
|
2021-06-16 15:43:07 +03:00
|
|
|
if (pComm->PendingEvents & SERIAL_EV_WINPR_WAITING)
|
2017-11-07 00:23:07 +03:00
|
|
|
{
|
|
|
|
if (pComm->eventChar != '\0' && memchr(lpBuffer, pComm->eventChar, nbRead))
|
2019-11-06 17:24:51 +03:00
|
|
|
pComm->PendingEvents |= SERIAL_EV_RXCHAR;
|
2017-11-07 00:23:07 +03:00
|
|
|
}
|
|
|
|
LeaveCriticalSection(&pComm->EventsLock);
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_true;
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
2014-05-12 19:33:56 +04:00
|
|
|
|
2021-06-09 15:03:34 +03:00
|
|
|
WINPR_ASSERT(FALSE);
|
2014-05-28 20:42:23 +04:00
|
|
|
*lpNumberOfBytesRead = 0;
|
2016-10-07 15:04:40 +03:00
|
|
|
return_false:
|
2014-06-17 18:34:20 +04:00
|
|
|
LeaveCriticalSection(&pComm->ReadLock);
|
2014-05-28 20:42:23 +04:00
|
|
|
return FALSE;
|
2016-10-07 15:04:40 +03:00
|
|
|
return_true:
|
2014-06-17 18:34:20 +04:00
|
|
|
LeaveCriticalSection(&pComm->ReadLock);
|
|
|
|
return TRUE;
|
2014-05-12 19:33:56 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ERRORS:
|
|
|
|
* ERROR_INVALID_HANDLE
|
|
|
|
* ERROR_NOT_SUPPORTED
|
|
|
|
* ERROR_INVALID_PARAMETER
|
|
|
|
* ERROR_BAD_DEVICE
|
|
|
|
*/
|
2019-11-06 17:24:51 +03:00
|
|
|
BOOL CommWriteFile(HANDLE hDevice, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite,
|
2016-10-07 15:04:40 +03:00
|
|
|
LPDWORD lpNumberOfBytesWritten, LPOVERLAPPED lpOverlapped)
|
2014-05-12 19:33:56 +04:00
|
|
|
{
|
2019-11-06 17:24:51 +03:00
|
|
|
WINPR_COMM* pComm = (WINPR_COMM*)hDevice;
|
2024-01-23 18:49:54 +03:00
|
|
|
struct timeval tmaxTimeout;
|
2024-01-23 18:49:54 +03:00
|
|
|
struct timeval* pTmaxTimeout = NULL;
|
2019-11-06 17:24:51 +03:00
|
|
|
EnterCriticalSection(&pComm->WriteLock); /* KISSer by the function's beginning */
|
2014-06-17 18:34:20 +04:00
|
|
|
|
2022-04-27 16:56:39 +03:00
|
|
|
if (!CommIsHandled(hDevice))
|
2016-10-07 15:04:40 +03:00
|
|
|
goto return_false;
|
2014-05-12 19:33:56 +04:00
|
|
|
|
|
|
|
if (lpOverlapped != NULL)
|
|
|
|
{
|
|
|
|
SetLastError(ERROR_NOT_SUPPORTED);
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-12 19:33:56 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
if (lpNumberOfBytesWritten == NULL)
|
|
|
|
{
|
2019-11-06 17:24:51 +03:00
|
|
|
SetLastError(ERROR_INVALID_PARAMETER); /* since we doesn't suppport lpOverlapped != NULL */
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-12 19:33:56 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
*lpNumberOfBytesWritten = 0; /* will be ajusted if required ... */
|
|
|
|
|
|
|
|
if (nNumberOfBytesToWrite <= 0)
|
|
|
|
{
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_true; /* FIXME: or FALSE? */
|
2014-05-12 19:33:56 +04:00
|
|
|
}
|
|
|
|
|
2014-05-28 22:15:08 +04:00
|
|
|
/* FIXME: had expected eventfd_write() to return EAGAIN when
|
|
|
|
* there is no eventfd_read() but this not the case. */
|
|
|
|
/* discard a possible and no more relevant event */
|
|
|
|
eventfd_read(pComm->fd_write_event, NULL);
|
2014-05-28 18:41:24 +04:00
|
|
|
/* ms */
|
2024-04-15 11:11:07 +03:00
|
|
|
ULONGLONG Tmax = 1ull * nNumberOfBytesToWrite * pComm->timeouts.WriteTotalTimeoutMultiplier +
|
|
|
|
1ull * pComm->timeouts.WriteTotalTimeoutConstant;
|
2014-05-28 18:41:24 +04:00
|
|
|
/* NB: select() may update the timeout argument to indicate
|
|
|
|
* how much time was left. Keep the timeout variable out of
|
|
|
|
* the while() */
|
2016-10-07 15:04:40 +03:00
|
|
|
pTmaxTimeout = &tmaxTimeout;
|
2015-03-09 22:01:51 +03:00
|
|
|
ZeroMemory(pTmaxTimeout, sizeof(struct timeval));
|
2016-10-07 15:04:40 +03:00
|
|
|
|
|
|
|
if (Tmax > 0)
|
2015-03-09 22:01:51 +03:00
|
|
|
{
|
2019-11-06 17:24:51 +03:00
|
|
|
pTmaxTimeout->tv_sec = Tmax / 1000; /* s */
|
2015-03-09 22:01:51 +03:00
|
|
|
pTmaxTimeout->tv_usec = (Tmax % 1000) * 1000; /* us */
|
|
|
|
}
|
2019-11-06 17:24:51 +03:00
|
|
|
else if ((pComm->timeouts.WriteTotalTimeoutMultiplier == 0) &&
|
|
|
|
(pComm->timeouts.WriteTotalTimeoutConstant == 0))
|
2014-05-28 18:41:24 +04:00
|
|
|
{
|
2015-03-09 22:01:51 +03:00
|
|
|
pTmaxTimeout = NULL;
|
2014-05-28 18:41:24 +04:00
|
|
|
}
|
2016-10-07 15:04:40 +03:00
|
|
|
|
2015-03-09 22:01:51 +03:00
|
|
|
/* else return immdiately */
|
2014-06-16 21:18:45 +04:00
|
|
|
|
2014-05-12 19:33:56 +04:00
|
|
|
while (*lpNumberOfBytesWritten < nNumberOfBytesToWrite)
|
|
|
|
{
|
2014-05-28 18:41:24 +04:00
|
|
|
int biggestFd = -1;
|
2024-01-23 18:49:54 +03:00
|
|
|
fd_set event_set;
|
|
|
|
fd_set write_set;
|
2024-01-23 18:49:54 +03:00
|
|
|
int nbFds = 0;
|
2014-05-28 18:41:24 +04:00
|
|
|
biggestFd = pComm->fd_write;
|
2016-10-07 15:04:40 +03:00
|
|
|
|
2014-05-28 18:41:24 +04:00
|
|
|
if (pComm->fd_write_event > biggestFd)
|
|
|
|
biggestFd = pComm->fd_write_event;
|
|
|
|
|
|
|
|
FD_ZERO(&event_set);
|
|
|
|
FD_ZERO(&write_set);
|
2021-06-09 15:03:34 +03:00
|
|
|
WINPR_ASSERT(pComm->fd_write_event < FD_SETSIZE);
|
|
|
|
WINPR_ASSERT(pComm->fd_write < FD_SETSIZE);
|
2014-05-28 18:41:24 +04:00
|
|
|
FD_SET(pComm->fd_write_event, &event_set);
|
|
|
|
FD_SET(pComm->fd_write, &write_set);
|
2016-10-07 15:04:40 +03:00
|
|
|
nbFds = select(biggestFd + 1, &event_set, &write_set, NULL, pTmaxTimeout);
|
2014-05-28 18:41:24 +04:00
|
|
|
|
2014-05-28 19:18:33 +04:00
|
|
|
if (nbFds < 0)
|
2014-05-28 18:41:24 +04:00
|
|
|
{
|
2024-02-05 15:01:08 +03:00
|
|
|
char ebuffer[256] = { 0 };
|
|
|
|
CommLog_Print(WLOG_WARN, "select() failure, errno=[%d] %s\n", errno,
|
|
|
|
winpr_strerror(errno, ebuffer, sizeof(ebuffer)));
|
2014-05-28 18:41:24 +04:00
|
|
|
SetLastError(ERROR_IO_DEVICE);
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-28 18:41:24 +04:00
|
|
|
}
|
|
|
|
|
2014-05-28 19:18:33 +04:00
|
|
|
if (nbFds == 0)
|
|
|
|
{
|
|
|
|
/* timeout */
|
|
|
|
SetLastError(ERROR_TIMEOUT);
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-28 19:18:33 +04:00
|
|
|
}
|
2014-06-16 21:18:45 +04:00
|
|
|
|
2014-05-28 18:41:24 +04:00
|
|
|
/* event_set */
|
|
|
|
|
|
|
|
if (FD_ISSET(pComm->fd_write_event, &event_set))
|
2014-05-12 19:33:56 +04:00
|
|
|
{
|
2014-05-28 18:41:24 +04:00
|
|
|
eventfd_t event = 0;
|
2014-05-12 19:33:56 +04:00
|
|
|
|
2014-05-28 21:10:01 +04:00
|
|
|
if (eventfd_read(pComm->fd_write_event, &event) < 0)
|
2014-05-12 19:33:56 +04:00
|
|
|
{
|
2014-05-28 18:41:24 +04:00
|
|
|
if (errno == EAGAIN)
|
|
|
|
{
|
2021-06-09 15:03:34 +03:00
|
|
|
WINPR_ASSERT(FALSE); /* not quite sure this should ever happen */
|
|
|
|
/* keep on */
|
2014-05-28 18:41:24 +04:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2024-02-05 15:01:08 +03:00
|
|
|
char ebuffer[256] = { 0 };
|
2016-10-07 15:04:40 +03:00
|
|
|
CommLog_Print(WLOG_WARN,
|
2019-11-06 17:24:51 +03:00
|
|
|
"unexpected error on reading fd_write_event, errno=[%d] %s\n",
|
2024-02-05 15:01:08 +03:00
|
|
|
errno, winpr_strerror(errno, ebuffer, sizeof(ebuffer)));
|
2014-06-17 18:34:20 +04:00
|
|
|
/* FIXME: goto return_false ? */
|
2014-05-28 18:41:24 +04:00
|
|
|
}
|
|
|
|
|
2021-06-09 15:03:34 +03:00
|
|
|
WINPR_ASSERT(errno == EAGAIN);
|
2014-05-28 18:41:24 +04:00
|
|
|
}
|
|
|
|
|
2021-06-16 15:43:07 +03:00
|
|
|
if (event == WINPR_PURGE_TXABORT)
|
2014-05-28 18:41:24 +04:00
|
|
|
{
|
|
|
|
SetLastError(ERROR_CANCELLED);
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-28 18:41:24 +04:00
|
|
|
}
|
|
|
|
|
2021-06-16 15:43:07 +03:00
|
|
|
WINPR_ASSERT(event == WINPR_PURGE_TXABORT); /* no other expected event so far */
|
2014-05-28 18:41:24 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* write_set */
|
2014-06-16 21:18:45 +04:00
|
|
|
|
2014-05-28 18:41:24 +04:00
|
|
|
if (FD_ISSET(pComm->fd_write, &write_set))
|
|
|
|
{
|
2024-01-23 18:49:54 +03:00
|
|
|
ssize_t nbWritten = 0;
|
2021-08-02 13:13:34 +03:00
|
|
|
nbWritten = write(pComm->fd_write, ((const BYTE*)lpBuffer) + (*lpNumberOfBytesWritten),
|
2016-10-07 15:04:40 +03:00
|
|
|
nNumberOfBytesToWrite - (*lpNumberOfBytesWritten));
|
2014-06-16 21:18:45 +04:00
|
|
|
|
2014-05-28 18:41:24 +04:00
|
|
|
if (nbWritten < 0)
|
|
|
|
{
|
2024-02-05 15:01:08 +03:00
|
|
|
char ebuffer[256] = { 0 };
|
2016-10-07 15:04:40 +03:00
|
|
|
CommLog_Print(WLOG_WARN,
|
2019-11-06 17:24:51 +03:00
|
|
|
"CommWriteFile failed after %" PRIu32
|
|
|
|
" bytes written, errno=[%d] %s\n",
|
2024-02-05 15:01:08 +03:00
|
|
|
*lpNumberOfBytesWritten, errno,
|
|
|
|
winpr_strerror(errno, ebuffer, sizeof(ebuffer)));
|
2014-05-28 18:41:24 +04:00
|
|
|
|
|
|
|
if (errno == EAGAIN)
|
|
|
|
{
|
2014-05-28 19:18:33 +04:00
|
|
|
/* keep on */
|
|
|
|
continue;
|
2014-05-28 18:41:24 +04:00
|
|
|
}
|
|
|
|
else if (errno == EBADF)
|
|
|
|
{
|
2014-05-12 19:33:56 +04:00
|
|
|
SetLastError(ERROR_BAD_DEVICE); /* STATUS_INVALID_DEVICE_REQUEST */
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-28 18:41:24 +04:00
|
|
|
}
|
2014-05-28 20:42:23 +04:00
|
|
|
else
|
|
|
|
{
|
2021-06-09 15:03:34 +03:00
|
|
|
WINPR_ASSERT(FALSE);
|
2014-05-28 20:42:23 +04:00
|
|
|
SetLastError(ERROR_IO_DEVICE);
|
2014-06-17 18:34:20 +04:00
|
|
|
goto return_false;
|
2014-05-28 20:42:23 +04:00
|
|
|
}
|
2014-05-12 19:33:56 +04:00
|
|
|
}
|
2014-06-16 21:18:45 +04:00
|
|
|
|
2014-05-28 18:41:24 +04:00
|
|
|
*lpNumberOfBytesWritten += nbWritten;
|
2014-05-12 19:33:56 +04:00
|
|
|
}
|
2014-05-28 18:41:24 +04:00
|
|
|
} /* while */
|
2014-05-23 14:27:09 +04:00
|
|
|
|
|
|
|
/* FIXME: this call to tcdrain() doesn't look correct and
|
|
|
|
* might hide a bug but was required while testing a serial
|
|
|
|
* printer. Its driver was expecting the modem line status
|
|
|
|
* SERIAL_MSR_DSR true after the sending which was never
|
|
|
|
* happenning otherwise. A purge was also done before each
|
2017-11-07 00:23:07 +03:00
|
|
|
* Write operation. The serial port was opened with:
|
2014-05-23 14:27:09 +04:00
|
|
|
* DesiredAccess=0x0012019F. The printer worked fine with
|
|
|
|
* mstsc. */
|
2014-05-28 20:42:23 +04:00
|
|
|
tcdrain(pComm->fd_write);
|
2017-11-07 00:23:07 +03:00
|
|
|
|
2016-10-07 15:04:40 +03:00
|
|
|
return_true:
|
2014-06-17 18:34:20 +04:00
|
|
|
LeaveCriticalSection(&pComm->WriteLock);
|
2014-05-12 19:33:56 +04:00
|
|
|
return TRUE;
|
2017-11-07 00:23:07 +03:00
|
|
|
|
2016-10-07 15:04:40 +03:00
|
|
|
return_false:
|
2014-06-17 18:34:20 +04:00
|
|
|
LeaveCriticalSection(&pComm->WriteLock);
|
|
|
|
return FALSE;
|
2014-05-12 19:33:56 +04:00
|
|
|
}
|
|
|
|
|
2014-07-04 18:16:26 +04:00
|
|
|
#endif /* __linux__ */
|