void SIPNict::onReceivedMessage(SIPMessage::Ptr pMsg, SIPTransportSession::Ptr pTransport)
{
SIPTransaction::Ptr pTransaction = static_cast<SIPTransaction::WeakPtr*>(_owner)->lock();
if (!pTransaction)
return;
int state = pTransaction->getState();
if (!pMsg->isResponse() || state == SIPTransaction::TRN_STATE_TERMINATED || state == COMPLETED)
return;
bool is2xx = pMsg->is2xx();
SIPTransaction::Ptr pParent = pTransaction->getParent();
switch (pTransaction->getState())
{
case SIPTransaction::TRN_STATE_IDLE:
case TRYING:
if (pMsg->is1xx())
{
pTransaction->setState(PROCEEDING);
if (!pTransaction->isParent() && pParent && pParent->getState() < PROCEEDING)
pParent->setState(PROCEEDING);
pTransaction->informTU(pMsg, pTransport);
}
else
{
if (pTransaction->isParent() && !is2xx)
{
//
// If we are the parent or this is and error response
// cancel e and f timers
//
cancelTimerE();
cancelTimerF();
}
else if (!pTransaction->isParent() && is2xx)
{
//
// If this is a branch and it is a 2xx reponse,
// then cancel both parents timers as sell
//
cancelTimerE();
cancelTimerF();
if (pParent)
{
pParent->fsm()->cancelTimerE();
pParent->fsm()->cancelTimerF();
pParent->setState(COMPLETED);
}
}
else if (!pTransaction->isParent() && !is2xx)
{
//
// If this is a branch and it is an error reponse,
// then cancel both parent timers as well if there
// is only one branch
//
cancelTimerE();
cancelTimerF();
if (pParent && pParent->getBranchCount() == 1)
{
pParent->fsm()->cancelTimerE();
pParent->fsm()->cancelTimerF();
pParent->setState(COMPLETED);
}
}
pTransaction->setState(COMPLETED);
pTransaction->informTU(pMsg, pTransport);
if (!pTransport->isReliableTransport())
{
//
// Start the longest time we want to handle retransmissions of 200 OK
//
startTimerK();
}
else
{
pTransaction->setState(SIPTransaction::TRN_STATE_TERMINATED);
if (is2xx || pTransaction->allBranchesCompleted())
{
if (pParent)
pParent->setState(SIPTransaction::TRN_STATE_TERMINATED);
}
}
}
break;
case PROCEEDING:
if (pMsg->is1xx())
{
pTransaction->informTU(pMsg, pTransport);
}
else
{
if (pTransaction->isParent() && !is2xx)
{
//
// If we are the parent or this is and error response
// cancel e and f timers
//
cancelTimerE();
cancelTimerF();
}
else if (!pTransaction->isParent() && is2xx)
{
//
// If this is a branch and it is a 2xx reponse,
// then cancel both parent timers as sell
//
cancelTimerE();
cancelTimerF();
if (pParent)
{
pParent->fsm()->cancelTimerE();
pParent->fsm()->cancelTimerF();
pParent->setState(COMPLETED);
}
}
else if (!pTransaction->isParent() && !is2xx)
{
//
// If this is a branch and it is an error reponse,
// then cancel both parent timers as well if there
// is only one branch
//
cancelTimerE();
cancelTimerF();
if (pParent)
{
if (pParent->getBranchCount() == 1)
{
pParent->fsm()->cancelTimerE();
pParent->fsm()->cancelTimerF();
pParent->setState(COMPLETED);
}
}
}
pTransaction->setState(COMPLETED);
pTransaction->informTU(pMsg, pTransport);
if (!pTransport->isReliableTransport())
{
//
// Start the longest time we want to handle retransmissions of 200 OK
//
startTimerK();
}
else
{
pTransaction->setState(SIPTransaction::TRN_STATE_TERMINATED);
if (is2xx || pTransaction->allBranchesCompleted())
if (pParent)
pParent->setState(SIPTransaction::TRN_STATE_TERMINATED);
}
}
break;
case COMPLETED:
break;
}
if (pTransaction->getState() == SIPTransaction::TRN_STATE_TERMINATED)
pTransaction->terminate();
if (pParent && pParent->getState() == SIPTransaction::TRN_STATE_TERMINATED)
pParent->terminate();
}
void SIPTransaction::sendResponse(
const SIPMessage::Ptr& pResponse,
const OSS::IPAddress& sendAddress)
{
if (!pResponse->isResponse())
throw OSS::SIP::SIPException("Sending a REQUEST using sendResponse() is illegal!");
SIPTransaction::Ptr pParent = getParent();
if (!_transport && isParent())
throw OSS::SIP::SIPException("Transport Not Ready!");
else if (!isParent() && pParent)
_transport = pParent->_transport;
if (_sendAddress.getPort() == 0)
_sendAddress = sendAddress;
SIPTransaction::Ptr pBranch = findBranch(pResponse);
if (pBranch)
{
pBranch->sendResponse(pResponse, sendAddress);
return;
}
else
{
//
// No branch is found. This instance will handle the response
//
if (_transport && _transport->isReliableTransport())
{
if (_transport->writeKeepAlive())
{
writeMessage(pResponse);
}
else
{
//
// Keep-alive failed so create a new transport
//
if (_localAddress.isValid() && _sendAddress.isValid())
{
//
// According to RFC 3261, if there is any transport failure, we must try to
// re-estabish a connectoin to the via sentby parameter instead
//
std::string transport;
if (SIPVia::msgGetTopViaTransport(pResponse.get(), transport))
{
_transport = _transportService->createClientTransport(_localAddress, _sendAddress, transport);
writeMessage(pResponse);
}
}
else
{
OSS_LOG_ERROR("SIPTransaction::sendResponse - Unable to re-establish transport to send response.");
}
}
}
else if (_transport)
{
//
// This is UDP so a keep-alive check won't do us any good
//
writeMessage(pResponse, _sendAddress);
}
else
{
OSS_LOG_ERROR("SIPTransaction::sendResponse - Transport is NULL.");
}
}
}