Method GetSharedRoutingPath

libi2pd/Datagram.cpp:604–738

	}

	std::shared_ptr<i2p::garlic::GarlicRoutingPath> DatagramSession::GetSharedRoutingPath ()
	{
		if (!m_RemoteLeaseSet || m_RemoteLeaseSet->IsExpired ())
		{
			m_RemoteLeaseSet = m_LocalDestination->FindLeaseSet(m_RemoteIdent);
			if (!m_RemoteLeaseSet)
			{
				if(!m_RequestingLS)
				{
					m_RequestingLS = true;
					m_LocalDestination->RequestDestination(m_RemoteIdent, std::bind(&DatagramSession::HandleLeaseSetUpdated, this, std::placeholders::_1));
				}
				return nullptr;
			}
		}

		if (!m_RoutingSession || m_RoutingSession->IsTerminated () || !m_RoutingSession->IsReadyToSend ())
		{
			bool found = false;
			if (!m_PendingRoutingSessions.empty ())
			{
				std::vector<std::weak_ptr<i2p::garlic::GarlicRoutingSession> > tmp;
				for (auto& it: m_PendingRoutingSessions)
				{
					auto s = it.lock ();
					if (s)
					{
						if (s->GetOwner () && s->IsReadyToSend ()) // found established session
						{
							m_RoutingSession = s;
							tmp.clear ();
							found = true;
							break;
						}
						tmp.push_back (s);
					}
				}
				m_PendingRoutingSessions.swap (tmp);
			}
			if (!found)
			{
				m_RoutingSession = m_LocalDestination->GetRoutingSession(m_RemoteLeaseSet, true);
				if (m_RoutingSession)
				{
					m_RoutingSession->SetAckRequestInterval (DATAGRAM_SESSION_ACK_REQUEST_INTERVAL);
					if (!m_RoutingSession->GetOwner () || !m_RoutingSession->IsReadyToSend ())
						m_PendingRoutingSessions.push_back (m_RoutingSession);
				}
			}
		}

		auto path = m_RoutingSession->GetSharedRoutingPath();
		if (path && m_RoutingSession->IsRatchets () && m_RoutingSession->CleanupUnconfirmedTags ())
		{
			LogPrint (eLogDebug, "Datagram: path reset");
			m_RoutingSession->SetSharedRoutingPath (nullptr);
			path = nullptr;
		}