TPKTClientProtocol.cxx
上传用户:sy_wanhua
上传日期:2013-07-25
资源大小:3048k
文件大小:5k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
C/C++
- /* ====================================================================
- * 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 $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const TPKTClientProtocol_cxx_Version =
- "$Id: TPKTClientProtocol.cxx,v 1.10 2001/06/26 22:54:22 icahoon Exp $";
- #include "TPKTClientProtocol.hxx"
- #include "TPKTClientSocket.hxx"
- #include "SystemStatus.hxx"
- #include "VLog.hxx"
- #include <cerrno>
- using Vocal::Transport::TPKTClientProtocol;
- using Vocal::Transport::Protocol;
- using Vocal::Transport::TPKTClientSocket;
- using Vocal::Logging::VLog;
- TPKTClientProtocol::TPKTClientProtocol(const char * name)
- : Protocol(name ? name : "TPKTClientProtocol"),
- pkt_(0),
- pktPosition_(0),
- pktLength_(0)
- {
- awaitIncoming(true);
- }
- TPKTClientProtocol::~TPKTClientProtocol()
- {
- }
- void
- TPKTClientProtocol::onIncomingAvailable()
- throw ( Vocal::SystemException,
- Vocal::SystemStatus,
- Vocal::Transport::ConnectionBrokenException )
- {
- const string fn("TPKTClientProtocol::onIncomingAvailable");
- VLog log(fn);
- // If we are at the start of a new packet, read the header.
- // If we don't receive the whole header, a status of EAGAIN will be thrown
- // and it will be the user's responsibility to call it again later,
- // most likely after selecting on the file descriptor again.
- //
- if ( pkt_ == 0 )
- {
- pktLength_ = getTPKTClientSocket().receiveTPKTHeader();
- pkt_ = new vector<u_int8_t>(pktLength_);
- pktPosition_ = 0;
- }
- // Get the current position of the array and start adding there.
- // If we don't receive the whole packet, throw a status of EAGAIN
- // and it will be the user's responsibility to call it again later,
- // most likely after selecting on the file descriptor again.
- //
- u_int8_t * bytes = &((*pkt_)[pktPosition_]);
- int bytesLeft = pktLength_ - pktPosition_;
- pktPosition_ += getTPKTClientSocket().receive(bytes, bytesLeft);
- if ( pktPosition_ < pktLength_ )
- {
- throw Vocal::SystemStatus(fn + " parital TPKT header received.",
- __FILE__, __LINE__, EAGAIN);
- }
- // We have a packet, so notify the user.
- //
- VDEBUG(log) << fn << ": TPKT arrived: length = " << pktLength_
- << VDEBUG_END(log);
- Sptr< vector<u_int8_t> > newPkt = pkt_;
- pkt_ = 0;
- pktPosition_ = 0;
- pktLength_ = 0;
- // This may cause the object to be deleted. Don't put anything
- // after onTPKTArrived.
- //
- onTPKTArrived(*newPkt);
- }