fixed #2004. Check supported crypto

libi2pd_client/SAM.cpp

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2013-2023, The PurpleI2P Project
+* Copyright (c) 2013-2024, The PurpleI2P Project
 *
 * This file is part of Purple i2pd project and licensed under BSD3
 *
@@ -549,6 +549,8 @@ namespace client
 	{
 		if (!session) session = m_Owner.FindSession(m_ID);
 		if (session)
+		{
+			if (session->GetLocalDestination ()->SupportsEncryptionType (remote->GetEncryptionType ()))
 			{	
 				m_SocketType = eSAMSocketTypeStream;
 				m_Stream = session->GetLocalDestination ()->CreateStream (remote);
@@ -562,6 +564,9 @@ namespace client
 				else
 					SendMessageReply (SAM_STREAM_STATUS_INVALID_ID, strlen(SAM_STREAM_STATUS_INVALID_ID), true);
 			}
+			else
+				SendStreamCantReachPeer ("Incompatible crypto");	
+		}
 		else
 			SendMessageReply (SAM_STREAM_STATUS_INVALID_ID, strlen(SAM_STREAM_STATUS_INVALID_ID), true);
 	}
@@ -573,7 +578,7 @@ namespace client
 		else
 		{
 			LogPrint (eLogError, "SAM: Destination to connect not found");
-			SendMessageReply (SAM_STREAM_STATUS_CANT_REACH_PEER, strlen(SAM_STREAM_STATUS_CANT_REACH_PEER), true);
+			SendStreamCantReachPeer ("LeaseSet not found");	
 		}
 	}
 
@@ -857,26 +862,31 @@ namespace client
 			SendSessionI2PError ("Wrong session type");
 	}
 
-	void SAMSocket::SendSessionI2PError(const std::string & msg)
+	void SAMSocket::SendReplyWithMessage (const char * reply, const std::string & msg)
 	{
-		LogPrint (eLogError, "SAM: Session I2P error: ", msg);
 #ifdef _MSC_VER
-		size_t len = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_SESSION_STATUS_I2P_ERROR, msg.c_str());
+		size_t len = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, reply, msg.c_str());
 #else
-		size_t len = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_SESSION_STATUS_I2P_ERROR, msg.c_str());
+		size_t len = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, reply, msg.c_str());
 #endif
 		SendMessageReply (m_Buffer, len, true);
 	}	
 		
+	void SAMSocket::SendSessionI2PError(const std::string & msg)
+	{
+		LogPrint (eLogError, "SAM: Session I2P error: ", msg);
+		SendReplyWithMessage (SAM_SESSION_STATUS_I2P_ERROR, msg);
+	}
+
 	void SAMSocket::SendStreamI2PError(const std::string & msg)
 	{
 		LogPrint (eLogError, "SAM: Stream I2P error: ", msg);
-#ifdef _MSC_VER
+		SendReplyWithMessage (SAM_STREAM_STATUS_I2P_ERROR, msg);	
-		size_t len = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_STREAM_STATUS_I2P_ERROR, msg.c_str());
+	}
-#else
+
-		size_t len = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_STREAM_STATUS_I2P_ERROR, msg.c_str());
+	void SAMSocket::SendStreamCantReachPeer(const std::string & msg)
-#endif
+	{
-		SendMessageReply (m_Buffer, len, true);
+		SendReplyWithMessage (SAM_STREAM_STATUS_CANT_REACH_PEER, msg);	
 	}	
 		
 	void SAMSocket::HandleNamingLookupLeaseSetRequestComplete (std::shared_ptr<i2p::data::LeaseSet> leaseSet, std::string name)

libi2pd_client/SAM.h

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2013-2023, The PurpleI2P Project
+* Copyright (c) 2013-2024, The PurpleI2P Project
 *
 * This file is part of Purple i2pd project and licensed under BSD3
 *
@@ -51,7 +51,7 @@ namespace client
 	const char SAM_STREAM_STATUS_OK[] = "STREAM STATUS RESULT=OK\n";
 	const char SAM_STREAM_STATUS_INVALID_ID[] = "STREAM STATUS RESULT=INVALID_ID\n";
 	const char SAM_STREAM_STATUS_INVALID_KEY[] = "STREAM STATUS RESULT=INVALID_KEY\n";
-	const char SAM_STREAM_STATUS_CANT_REACH_PEER[] = "STREAM STATUS RESULT=CANT_REACH_PEER\n";
+	const char SAM_STREAM_STATUS_CANT_REACH_PEER[] = "STREAM STATUS RESULT=CANT_REACH_PEER MESSAGE=\"%s\"\n";
 	const char SAM_STREAM_STATUS_I2P_ERROR[] = "STREAM STATUS RESULT=I2P_ERROR MESSAGE=\"%s\"\n";
 	const char SAM_STREAM_ACCEPT[] = "STREAM ACCEPT";
 	const char SAM_STREAM_FORWARD[] = "STREAM FORWARD";
@@ -144,8 +144,10 @@ namespace client
 			void ProcessNamingLookup (char * buf, size_t len);
 			void ProcessSessionAdd (char * buf, size_t len);
 			void ProcessSessionRemove (char * buf, size_t len);
+			void SendReplyWithMessage (const char * reply, const std::string & msg);
 			void SendSessionI2PError(const std::string & msg);
 			void SendStreamI2PError(const std::string & msg);	
+			void SendStreamCantReachPeer(const std::string & msg);
 			size_t ProcessDatagramSend (char * buf, size_t len, const char * data); // from SAM 1.0
 			void ExtractParams (char * buf, std::map<std::string, std::string>& params);