VFilter.cxx
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上传日期:2013-07-25
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- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * 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 names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const VFilter_cxx_Version =
- "$Id: VFilter.cxx,v 1.7 2001/06/27 01:43:45 bko Exp $";
- #include "VFilter.hxx"
- #include "cpLog.h"
- #ifndef __vxworks
- #ifdef WIN32
- #include <iostream>
- using std::string;
- using std::cout;
- using std::endl;
- #endif // WIN32
- VFilter* VFilter::instance_ = 0;
- VFilter::VFilter()
- :
- inPipe("sip-inpipe"),
- outPipe("sip-outpipe"),
- useFilter(false)
- {
- struct timeval timeout;
- timeout.tv_sec = 1;
- timeout.tv_usec = 0;
- inPipe.setTimeout(timeout);
- outPipe.setTimeout(timeout);
- if (getenv("SIP_FILTER"))
- {
- cpLog( LOG_INFO, "Environment variable SIP_FILTER is set." );
- cpLog( LOG_INFO, "Using VFilter to modify SIP messages" );
- useFilter = true;
- }
- else
- {
- cpLog( LOG_INFO, "Environment variable SIP_FILTER is Not set." );
- cpLog( LOG_INFO, "Not using VFilter to modify SIP messages" );
- }
- }
- string VFilter::inFilter(const string& input)
- {
- if (!instance_)
- {
- instance_ = new VFilter;
- }
- if (instance_->useFilter)
- {
- instance_->inPipe.clearCtl();
- string output;
- if (instance_->inPipe.sendMsg(input))
- {
- if (instance_->inPipe.recMsg(&output))
- {
- return output;
- }
- }
- }
- // in this case, there was an error or the environment variable
- // is not set, so no filtering is done
- return input;
- }
- string VFilter::outFilter(const string& input)
- {
- if (!instance_)
- {
- instance_ = new VFilter;
- }
- if (instance_->useFilter)
- {
- instance_->outPipe.clearCtl();
- string output;
- if (instance_->outPipe.sendMsg(input))
- {
- if (instance_->outPipe.recMsg(&output))
- {
- return output;
- }
- }
- }
- // in this case, there was an error or the environment variable
- // is not set, so no filtering is done
- return input;
- }
- #else
- // the vxworks
- VFilter::VFilter()
- {}
- string VFilter::inFilter(const string& input)
- {
- return input;
- }
- string VFilter::outFilter(const string& input)
- {
- return input;
- }
- #endif