move Bob's peer tests from SSU2 session to server

libi2pd/SSU2.cpp

@@ -152,6 +152,7 @@ namespace transport
 		m_SessionsByRouterHash.clear ();
 		m_PendingOutgoingSessions.clear ();
 		m_Relays.clear ();
+		m_PeerTests.clear ();
 		m_Introducers.clear ();
 		m_IntroducersV6.clear ();
 		m_ConnectedRecently.clear ();
@@ -621,6 +622,23 @@ namespace transport
 		return nullptr;
 	}
 
+	bool SSU2Server::AddPeerTest (uint32_t nonce, std::shared_ptr<SSU2Session> aliceSession, uint64_t ts)
+	{
+		return m_PeerTests.emplace (nonce, std::pair{ aliceSession, ts }).second;
+	}	
+
+	std::shared_ptr<SSU2Session> SSU2Server::GetPeerTest (uint32_t nonce)
+	{
+		auto it = m_PeerTests.find (nonce);
+		if (it != m_PeerTests.end ())
+		{
+			auto s = it->second.first.lock ();
+			m_PeerTests.erase (it);
+			return s;
+		}
+		return nullptr;
+	}	
+		
 	bool SSU2Server::AddRequestedPeerTest (uint32_t nonce, std::shared_ptr<SSU2PeerTestSession> session, uint64_t ts)
 	{
 		return m_RequestedPeerTests.emplace (nonce, std::pair{ session, ts }).second;
@@ -1065,6 +1083,17 @@ namespace transport
 					it++;
 			}
 
+			for (auto it = m_PeerTests.begin (); it != m_PeerTests.end ();)
+			{
+				if (ts > it->second.second + SSU2_PEER_TEST_EXPIRATION_TIMEOUT || it->second.first.expired ())
+				{
+					LogPrint (eLogInfo, "SSU2: Peer test nonce ", it->first, " was not responded in ", SSU2_PEER_TEST_EXPIRATION_TIMEOUT, " seconds or session invalid. Deleted");
+					it = m_PeerTests.erase (it);
+				}
+				else
+					it++;
+			}
+			
 			for (auto it = m_IncomingTokens.begin (); it != m_IncomingTokens.end (); )
 			{
 				if (ts > it->second.second)

libi2pd/SSU2.h

@@ -111,6 +111,9 @@ namespace transport
 			void RemoveRelay (uint32_t tag);
 			std::shared_ptr<SSU2Session> FindRelaySession (uint32_t tag);
 
+			bool AddPeerTest (uint32_t nonce, std::shared_ptr<SSU2Session> aliceSession, uint64_t ts); 
+			std::shared_ptr<SSU2Session> GetPeerTest (uint32_t nonce);	
+		
 			bool AddRequestedPeerTest (uint32_t nonce, std::shared_ptr<SSU2PeerTestSession> session, uint64_t ts);
 			std::shared_ptr<SSU2PeerTestSession> GetRequestedPeerTest (uint32_t nonce);		
 		
@@ -185,6 +188,7 @@ namespace transport
 			mutable std::mutex m_PendingOutgoingSessionsMutex;
 			std::map<boost::asio::ip::udp::endpoint, std::pair<uint64_t, uint32_t> > m_IncomingTokens, m_OutgoingTokens; // remote endpoint -> (token, expires in seconds)
 			std::unordered_map<uint32_t, std::weak_ptr<SSU2Session> > m_Relays; // we are introducer, relay tag -> session
+			std::unordered_map<uint32_t, std::pair <std::weak_ptr<SSU2Session>, uint64_t > > m_PeerTests; // nonce->(Alice, timestamp). We are Bob
 			std::list<std::pair<i2p::data::IdentHash, uint32_t> > m_Introducers, m_IntroducersV6; // introducers we are connected to
 			i2p::util::MemoryPoolMt<Packet> m_PacketsPool;
 			i2p::util::MemoryPoolMt<Packets> m_PacketsArrayPool;

libi2pd/SSU2Session.cpp

@@ -283,7 +283,6 @@ namespace transport
 			m_SentPackets.clear ();
 			m_IncompleteMessages.clear ();
 			m_RelaySessions.clear ();
-			m_PeerTests.clear ();
 			m_ReceivedI2NPMsgIDs.clear ();
 			m_Server.RemoveSession (m_SourceConnID);
 			transports.PeerDisconnected (shared_from_this ());
@@ -2145,7 +2144,7 @@ namespace transport
 					GetRemoteIdentity ()->GetIdentHash ());
 				if (session) // session with Charlie
 				{
-					session->m_PeerTests.emplace (nonce, std::make_pair (shared_from_this (), i2p::util::GetSecondsSinceEpoch ()));
+					m_Server.AddPeerTest (nonce, shared_from_this (), ts/1000);
 					auto packet = m_Server.GetSentPacketsPool ().AcquireShared ();
 					// Alice's RouterInfo
 					auto r = i2p::data::netdb.FindRouter (GetRemoteIdentity ()->GetIdentHash ());
@@ -2251,33 +2250,28 @@ namespace transport
 			}
 			case 3: // Bob from Charlie
 			{
-				auto it = m_PeerTests.find (nonce);
-				if (it != m_PeerTests.end ())
+				auto aliceSession = m_Server.GetPeerTest (nonce);
+				if (aliceSession && aliceSession->IsEstablished ())
 				{	
-					auto aliceSession = it->second.first.lock ();
-					if (aliceSession && aliceSession->IsEstablished ())
+					uint8_t payload[SSU2_MAX_PACKET_SIZE];
+					// Charlie's RouterInfo
+					auto r = i2p::data::netdb.FindRouter (GetRemoteIdentity ()->GetIdentHash ());
+					if (r && (r->IsUnreachable () || !i2p::data::netdb.PopulateRouterInfoBuffer (r))) r = nullptr;
+					size_t payloadSize = r ? CreateRouterInfoBlock (payload, m_MaxPayloadSize - len - 32, r) : 0;
+					if (!payloadSize && r)
+						aliceSession->SendFragmentedMessage (CreateDatabaseStoreMsg (r));
+					if (payloadSize + len + 16 > m_MaxPayloadSize)
 					{
-						uint8_t payload[SSU2_MAX_PACKET_SIZE];
-						// Charlie's RouterInfo
-						auto r = i2p::data::netdb.FindRouter (GetRemoteIdentity ()->GetIdentHash ());
-						if (r && (r->IsUnreachable () || !i2p::data::netdb.PopulateRouterInfoBuffer (r))) r = nullptr;
-						size_t payloadSize = r ? CreateRouterInfoBlock (payload, m_MaxPayloadSize - len - 32, r) : 0;
-						if (!payloadSize && r)
-							aliceSession->SendFragmentedMessage (CreateDatabaseStoreMsg (r));
-						if (payloadSize + len + 16 > m_MaxPayloadSize)
-						{
-							// doesn't fit one message, send RouterInfo in separate message
-							aliceSession->SendData (payload, payloadSize);
-							payloadSize = 0;
-						}
-						// PeerTest to Alice
-						payloadSize += CreatePeerTestBlock (payload + payloadSize, m_MaxPayloadSize, 4,
-							(SSU2PeerTestCode)buf[1], GetRemoteIdentity ()->GetIdentHash (), buf + offset, len - offset);
-						if (payloadSize < m_MaxPayloadSize)
-							payloadSize += CreatePaddingBlock (payload + payloadSize, m_MaxPayloadSize - payloadSize);
+						// doesn't fit one message, send RouterInfo in separate message
 						aliceSession->SendData (payload, payloadSize);
+						payloadSize = 0;
 					}
-					m_PeerTests.erase (it);
+					// PeerTest to Alice
+					payloadSize += CreatePeerTestBlock (payload + payloadSize, m_MaxPayloadSize, 4,
+						(SSU2PeerTestCode)buf[1], GetRemoteIdentity ()->GetIdentHash (), buf + offset, len - offset);
+					if (payloadSize < m_MaxPayloadSize)
+						payloadSize += CreatePaddingBlock (payload + payloadSize, m_MaxPayloadSize - payloadSize);
+					aliceSession->SendData (payload, payloadSize);
 				}	
 				else
 					LogPrint (eLogWarning, "SSU2: Unknown peer test 3 nonce ", nonce);
@@ -3030,16 +3024,6 @@ namespace transport
 			else
 				++it;
 		}
-		for (auto it = m_PeerTests.begin (); it != m_PeerTests.end ();)
-		{
-			if (ts > it->second.second + SSU2_PEER_TEST_EXPIRATION_TIMEOUT || it->second.first.expired ())
-			{
-				LogPrint (eLogWarning, "SSU2: Peer test nonce ", it->first, " was not responded in ", SSU2_PEER_TEST_EXPIRATION_TIMEOUT, " seconds or session invalid. Deleted");
-				it = m_PeerTests.erase (it);
-			}
-			else
-				++it;
-		}
 		if (m_PathChallenge)
 			RequestTermination (eSSU2TerminationReasonNormalClose);
 	}

libi2pd/SSU2Session.h

@@ -373,7 +373,6 @@ namespace transport
 			std::map<uint32_t, std::shared_ptr<SSU2SentPacket> > m_SentPackets; // packetNum -> packet
 			std::unordered_map<uint32_t, std::shared_ptr<SSU2IncompleteMessage> > m_IncompleteMessages; // msgID -> I2NP
 			std::unordered_map<uint32_t, std::pair <std::shared_ptr<SSU2Session>, uint64_t > > m_RelaySessions; // nonce->(Alice, timestamp) for Bob or nonce->(Charlie, timestamp) for Alice
-			std::unordered_map<uint32_t, std::pair <std::weak_ptr<SSU2Session>, uint64_t > > m_PeerTests; // nonce->(Alice, timestamp). We are Bob
 			std::list<std::shared_ptr<I2NPMessage> > m_SendQueue;
 			i2p::I2NPMessagesHandler m_Handler;
 			bool m_IsDataReceived;