| /** @addtogroup MCD_MCDIMPL_DAEMON_KERNEL |
| * @{ |
| * @file |
| * |
| * Kernel Module Interface. |
| * |
| * <!-- Copyright Giesecke & Devrient GmbH 2009 - 2012 --> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
| * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #include <cstdlib> |
| |
| #include <fcntl.h> |
| #include <sys/mman.h> |
| #include <errno.h> |
| |
| #include "CKMod.h" |
| |
| #include "log.h" |
| |
| #define INVALID_FILE_DESCRIPTOR ((int)(-1)) |
| |
| //------------------------------------------------------------------------------ |
| CKMod::CKMod(void) |
| { |
| fdKMod = INVALID_FILE_DESCRIPTOR; |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| CKMod::~CKMod(void) |
| { |
| close(); |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| bool CKMod::isOpen(void) |
| { |
| return (INVALID_FILE_DESCRIPTOR == fdKMod) ? false : true; |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| mcResult_t CKMod::open(const char *deviceName) |
| { |
| if (isOpen()) { |
| LOG_W("already open"); |
| return MC_DRV_ERR_DEVICE_ALREADY_OPEN; |
| } |
| |
| LOG_I(" Opening kernel module at %s.", deviceName); |
| |
| // open return -1 on error, "errno" is set with details |
| int openRet = ::open(deviceName, O_RDWR); |
| if (openRet == -1) { |
| LOG_ERRNO("open"); |
| return MAKE_MC_DRV_KMOD_WITH_ERRNO(errno); |
| } |
| |
| fdKMod = openRet; |
| return MC_DRV_OK; |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| void CKMod::close( |
| void |
| ) |
| { |
| if (isOpen()) { |
| if (::close(fdKMod) != 0) { |
| LOG_ERRNO("close"); |
| } else { |
| fdKMod = INVALID_FILE_DESCRIPTOR; |
| } |
| } else { |
| LOG_W(" Kernel module device not open"); |
| } |
| } |
| |
| /** @} */ |