turnasyncsocket.cxx

这是国外的resip协议栈

      }
   }
   else
   {
      // Check if success or not
      if(stunMessage.mHasErrorCode)
      {
         if(mTurnAsyncSocketHandler) mTurnAsyncSocketHandler->onAllocationFailure(getSocketDescriptor(), asio::error_code(stunMessage.mErrorCode.errorClass * 100 + stunMessage.mErrorCode.number, asio::error::misc_category));
      }
      else
      {
         if(mTurnAsyncSocketHandler) mTurnAsyncSocketHandler->onAllocationFailure(getSocketDescriptor(), asio::error_code(MissingAttributes, asio::error::misc_category));
         return asio::error_code(MissingAttributes, asio::error::misc_category);
      }
   }
   return asio::error_code();
}

asio::error_code 
TurnAsyncSocket::handleRefreshResponse(StunMessage& stunMessage)
{
   if(stunMessage.mClass == StunMessage::StunClassSuccessResponse)
   {
      if(stunMessage.mHasTurnLifetime)
      {
         mLifetime = stunMessage.mTurnLifetime;
      }
      else
      {
         mLifetime = 0;
      }
      if(mLifetime != 0)
      {
         mHaveAllocation = true;
         startAllocationTimer();
         if(mTurnAsyncSocketHandler) mTurnAsyncSocketHandler->onRefreshSuccess(getSocketDescriptor(), mLifetime);
         if(mCloseAfterDestroyAllocationFinishes)
         {
            mHaveAllocation = false;
            actualClose();
         }
      }
      else
      {
         cancelAllocationTimer();
         mHaveAllocation = false;
         if(mTurnAsyncSocketHandler) mTurnAsyncSocketHandler->onRefreshSuccess(getSocketDescriptor(), 0);
         if(mCloseAfterDestroyAllocationFinishes)
         {
            actualClose();
         }
      }
   }
   else
   {
      // Check if success or not
      if(stunMessage.mHasErrorCode)
      {
         if(mTurnAsyncSocketHandler) mTurnAsyncSocketHandler->onRefreshFailure(getSocketDescriptor(), asio::error_code(stunMessage.mErrorCode.errorClass * 100 + stunMessage.mErrorCode.number, asio::error::misc_category));
         if(mCloseAfterDestroyAllocationFinishes)
         {
            mHaveAllocation = false;
            actualClose();
         }
      }
      else
      {
         if(mTurnAsyncSocketHandler) mTurnAsyncSocketHandler->onRefreshFailure(getSocketDescriptor(), asio::error_code(MissingAttributes, asio::error::misc_category));
         if(mCloseAfterDestroyAllocationFinishes)
         {
            mHaveAllocation = false;
            actualClose();
         }
         return asio::error_code(MissingAttributes, asio::error::misc_category);
      }
   }
   return asio::error_code();
}

void
TurnAsyncSocket::send(const char* buffer, unsigned int size)
{
   boost::shared_ptr<DataBuffer> data(new DataBuffer(buffer, size));
   mGuards.push(mAsyncSocketBase.shared_from_this());
   mIOService.post(boost::bind(&TurnAsyncSocket::doSend, this, data));
}

void
TurnAsyncSocket::doSend(boost::shared_ptr<DataBuffer>& data)
{
   GuardReleaser guardReleaser(mGuards);

   // Allow raw data to be sent if there is no allocation
   if(!mHaveAllocation)
   {
      send(data);
      return;
   }

   return sendTo(*mActiveDestination, data);
}

void 
TurnAsyncSocket::sendTo(const asio::ip::address& address, unsigned short port, const char* buffer, unsigned int size)
{
   boost::shared_ptr<DataBuffer> data(new DataBuffer(buffer, size));
   mGuards.push(mAsyncSocketBase.shared_from_this());
   mIOService.post(boost::bind(&TurnAsyncSocket::doSendTo, this, address, port, data));
}

void 
TurnAsyncSocket::doSendTo(const asio::ip::address& address, unsigned short port, boost::shared_ptr<DataBuffer>& data)
{
   GuardReleaser guardReleaser(mGuards);

   // Allow raw data to be sent if there is no allocation
   if(!mHaveAllocation)
   {
      StunTuple destination(mLocalBinding.getTransportType(), address, port);
      mAsyncSocketBase.send(destination, data);
      return;
   }

   // Setup Remote Peer 
   StunTuple remoteTuple(mRelayTransportType, address, port);
   RemotePeer* remotePeer = mChannelManager.findRemotePeerByPeerAddress(remoteTuple);
   if(!remotePeer)
   {
      // No remote peer yet (ie. not data sent or received from remote peer) - so create one
      remotePeer = mChannelManager.createRemotePeer(remoteTuple, mChannelManager.getNextChannelNumber(), 0);
      assert(remotePeer);
   }
   return sendTo(*remotePeer, data);
}

void
TurnAsyncSocket::sendTo(RemotePeer& remotePeer, boost::shared_ptr<DataBuffer>& data)
{
   if(remotePeer.isClientToServerChannelConfirmed())
   {
      // send framed data to active destination
      send(remotePeer.getClientToServerChannel(), data);
   }
   else
   {
      // Data must be wrapped in a Send Indication
      // Wrap data in a SendInd
      StunMessage* ind = createNewStunMessage(StunMessage::StunClassIndication, StunMessage::TurnSendMethod, false);
      ind->mHasTurnPeerAddress = true;
      StunMessage::setStunAtrAddressFromTuple(ind->mTurnPeerAddress, remotePeer.getPeerTuple());
      ind->mHasTurnChannelNumber = true;
      ind->mTurnChannelNumber = remotePeer.getClientToServerChannel();
      if(data->size() > 0)
      {
         ind->setTurnData(data->data(), data->size());
      }

      // If not using UDP - then mark channel as confirmed
      if(mLocalBinding.getTransportType() != StunTuple::UDP)
      {
         remotePeer.setClientToServerChannelConfirmed();
      }

      // Send indication to Turn Server
      sendStunMessage(ind);
   }
}

void
TurnAsyncSocket::connect(const std::string& address, unsigned short port, bool turnFraming)
{
   mTurnFraming = turnFraming;
   mAsyncSocketBase.connect(address,port);
}

void
TurnAsyncSocket::close()
{
   mGuards.push(mAsyncSocketBase.shared_from_this());
   mIOService.post(boost::bind(&TurnAsyncSocket::doClose, this));
}

void
TurnAsyncSocket::doClose()
{
   GuardReleaser guardReleaser(mGuards);

   // If we have an allocation over UDP then we should send a refresh with lifetime 0 to destroy the allocation
   // Note:  For TCP and TLS, the socket disconnection will destroy the allocation automatically
   if(mHaveAllocation && mLocalBinding.getTransportType() == StunTuple::UDP)
   {
      mCloseAfterDestroyAllocationFinishes = true;
      destroyAllocation();
   }
   else
   {
      actualClose();
   }
}

void
TurnAsyncSocket::actualClose()
{
   clearActiveRequestMap();
   cancelAllocationTimer();
   mAsyncSocketBase.close();
}

void 
TurnAsyncSocket::turnReceive()
{
   if(mTurnFraming)
   {
      //mAsyncSocketBase.framedReceive();
      mAsyncSocketBase.doFramedReceive();
   }
   else
   {
      //mAsyncSocketBase.receive();
      mAsyncSocketBase.doReceive();
   }
}

void 
TurnAsyncSocket::send(boost::shared_ptr<DataBuffer>& data)
{
   StunTuple destination(mLocalBinding.getTransportType(), mAsyncSocketBase.getConnectedAddress(), mAsyncSocketBase.getConnectedPort());
   mAsyncSocketBase.send(destination, data);
}

void 
TurnAsyncSocket::send(unsigned short channel, boost::shared_ptr<DataBuffer>& data)
{
   StunTuple destination(mLocalBinding.getTransportType(), mAsyncSocketBase.getConnectedAddress(), mAsyncSocketBase.getConnectedPort());
   mAsyncSocketBase.send(destination, channel, data);
}

TurnAsyncSocket::RequestEntry::RequestEntry(asio::io_service& ioService, 
                                            TurnAsyncSocket* turnAsyncSocket, 
                                            StunMessage* requestMessage) : 
   mIOService(ioService), 
   mTurnAsyncSocket(turnAsyncSocket), 
   mRequestMessage(requestMessage), 
   mRequestTimer(ioService),
   mRequestsSent(1)
{
   mTimeout = mTurnAsyncSocket->mLocalBinding.getTransportType() == StunTuple::UDP ? UDP_RT0 : TCP_RESPONSE_TIME;
}

void
TurnAsyncSocket::RequestEntry::startTimer()
{
   // start the request timer
   mRequestTimer.expires_from_now(boost::posix_time::milliseconds(mTimeout));  
   mRequestTimer.async_wait(boost::bind(&TurnAsyncSocket::RequestEntry::requestTimerExpired, shared_from_this(), asio::placeholders::error));
}

void
TurnAsyncSocket::RequestEntry::stopTimer()
{
   // stop the request timer
   mRequestTimer.cancel();
}

TurnAsyncSocket::RequestEntry::~RequestEntry() 
{ 
   delete mRequestMessage; 
}

void 
TurnAsyncSocket::RequestEntry::requestTimerExpired(const asio::error_code& e)
{
   if(!e && mRequestMessage)  // Note:  There is a race condition with clearing out of mRequestMessage when 401 is received - check that mRequestMessage is not 0 avoids any resulting badness
   {
      if(mTurnAsyncSocket->mLocalBinding.getTransportType() != StunTuple::UDP || mRequestsSent == UDP_MAX_RETRANSMITS)
      {
         mTurnAsyncSocket->requestTimeout(mRequestMessage->mHeader.magicCookieAndTid);
         return;
      }
      // timed out and should retransmit - calculate next timeout
      if(mRequestsSent == UDP_MAX_RETRANSMITS - 1)
      {
          mTimeout = UDP_FINAL_REQUEST_TIME;
      } 
      else
      {
          mTimeout = (mTimeout*2);
      }
      // retransmit
      DebugLog(<< "RequestEntry::requestTimerExpired: retransmitting...");
      mRequestsSent++;
      mTurnAsyncSocket->sendStunMessage(mRequestMessage, true);

      startTimer();
   }
}

void 
TurnAsyncSocket::requestTimeout(UInt128 tid)
{
   RequestMap::iterator it = mActiveRequestMap.find(tid);
   if(it != mActiveRequestMap.end())
   {
      switch(it->second->mRequestMessage->mMethod)
      {
      case StunMessage::BindMethod:
         if(mTurnAsyncSocketHandler) mTurnAsyncSocketHandler->onBindFailure(getSocketDescriptor(), asio::error_code(reTurn::ResponseTimeout, asio::error::misc_category));
         break;
      case StunMessage::SharedSecretMethod:
         if(mTurnAsyncSocketHandler) mTurnAsyncSocketHandler->onSharedSecretFailure(getSocketDescriptor(), asio::error_code(reTurn::ResponseTimeout, asio::error::misc_category));
         break;
      case StunMessage::TurnAllocateMethod:
         if(mTurnAsyncSocketHandler) mTurnAsyncSocketHandler->onAllocationFailure(getSocketDescriptor(), asio::error_code(reTurn::ResponseTimeout, asio::error::misc_category));
         break;
      case StunMessage::TurnRefreshMethod:
         if(mTurnAsyncSocketHandler) mTurnAsyncSocketHandler->onRefreshFailure(getSocketDescriptor(), asio::error_code(reTurn::ResponseTimeout, asio::error::misc_category));
         if(mCloseAfterDestroyAllocationFinishes)
         {
            mHaveAllocation = false;
            actualClose();
         }
         break;
      default:
         assert(false);
      }
      mActiveRequestMap.erase(it);
   }
}

void
TurnAsyncSocket::clearActiveRequestMap()
{
   // Clear out active request map - !slg! TODO this really should happen from the io service thread
   RequestMap::iterator it = mActiveRequestMap.begin();
   for(;it != mActiveRequestMap.end(); it++)
   {
      it->second->stopTimer();
   }
   mActiveRequestMap.clear();
}

void
TurnAsyncSocket::startAllocationTimer()
{
   mAllocationTimer.expires_from_now(boost::posix_time::seconds((mLifetime*5)/8));  // Allocation refresh should sent before 3/4 lifetime - use 5/8 lifetime 
   mGuards.push(mAsyncSocketBase.shared_from_this());
   mAllocationTimer.async_wait(boost::bind(&TurnAsyncSocket::allocationTimerExpired, this, asio::placeholders::error));
}

void
TurnAsyncSocket::cancelAllocationTimer()
{
   mAllocationTimer.cancel();
}

void 
TurnAsyncSocket::allocationTimerExpired(const asio::error_code& e)
{
   if(!e)
   {
      doRefreshAllocation(mLifetime);
   }
   else
   {
      // Note:  only release guard if not calling doRefreshAllocation - since
      // doRefreshAllocation will release the guard
      GuardReleaser guardReleaser(mGuards);
   }
}

} // namespace


/* ====================================================================

 Original contribution Copyright (C) 2007 Plantronics, Inc.
 Provided under the terms of the Vovida Software License, Version 2.0.

 The Vovida Software License, Version 2.0 
 
 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. 
 
 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 THE COPYRIGHT
 OWNER OR 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
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