Merge pull request #778 from majestrate/datagram-fix-2017-01-13

use std::shared_from_this for DatagramSession

Datagram.cpp

@@ -182,7 +182,8 @@ namespace datagram
 		// we used this session
 		m_LastUse = i2p::util::GetMillisecondsSinceEpoch();
 		// schedule send
-		m_LocalDestination->GetService().post(std::bind(&DatagramSession::HandleSend, this, msg));
+		auto self = shared_from_this();
+		m_LocalDestination->GetService().post(std::bind(&DatagramSession::HandleSend, self, msg));
 	}
 
 	DatagramSession::Info DatagramSession::GetSessionInfo() const
@@ -334,7 +335,8 @@ namespace datagram
 	{
 		boost::posix_time::milliseconds dlt(100);
 		m_SendQueueTimer.expires_from_now(dlt);
-		m_SendQueueTimer.async_wait([this](const boost::system::error_code & ec) { if(ec) return; FlushSendQueue(); });
+		auto self = shared_from_this();
+		m_SendQueueTimer.async_wait([self](const boost::system::error_code & ec) { if(ec) return; self->FlushSendQueue(); });
 	}
 }
 }

Datagram.h

@@ -34,7 +34,7 @@ namespace datagram
   // max 64 messages buffered in send queue for each datagram session
   const size_t DATAGRAM_SEND_QUEUE_MAX_SIZE = 64;
 	
-	class DatagramSession
+	class DatagramSession : public std::enable_shared_from_this<DatagramSession>
 	{
 	public:
 		DatagramSession(i2p::client::ClientDestination * localDestination,
@@ -91,6 +91,8 @@ namespace datagram
     bool m_RequestingLS;
 	};
 
+	typedef std::shared_ptr<DatagramSession> DatagramSession_ptr;
+
 	const size_t MAX_DATAGRAM_SIZE = 32768;	 
 	class DatagramDestination
 	{
@@ -132,7 +134,7 @@ namespace datagram
 			i2p::data::IdentityEx m_Identity;
 			Receiver m_Receiver; // default
 			std::mutex m_SessionsMutex;
-			std::map<i2p::data::IdentHash, std::shared_ptr<DatagramSession> > m_Sessions;
+			std::map<i2p::data::IdentHash, DatagramSession_ptr > m_Sessions;
 			std::mutex m_ReceiversMutex;
 			std::map<uint16_t, Receiver> m_ReceiversByPorts;