select proper SSU address for incoming sessions

RouterInfo.cpp

@@ -625,13 +625,18 @@ namespace data
 		return GetAddress (eTransportSSU, v4only);
 	}	
 
-	const RouterInfo::Address * RouterInfo::GetAddress (TransportStyle s, bool v4only) const
+	const RouterInfo::Address * RouterInfo::GetSSUV6Address () const 
+	{
+		return GetAddress (eTransportSSU, false, true);
+	}	
+		
+	const RouterInfo::Address * RouterInfo::GetAddress (TransportStyle s, bool v4only, bool v6only) const
 	{
 		for (auto& address : m_Addresses)
 		{
 			if (address.transportStyle == s)
 			{	
-				if (!v4only || address.host.is_v4 ())
+				if ((!v4only || address.host.is_v4 ()) && (!v6only || address.host.is_v6 ()))
 					return &address;
 			}	
 		}	

RouterInfo.h

@@ -98,6 +98,7 @@ namespace data
 			std::vector<Address>& GetAddresses () { return m_Addresses; };
 			const Address * GetNTCPAddress (bool v4only = true) const;
 			const Address * GetSSUAddress (bool v4only = true) const;
+			const Address * GetSSUV6Address () const;
 			
 			void AddNTCPAddress (const char * host, int port);
 			void AddSSUAddress (const char * host, int port, const uint8_t * key);
@@ -152,7 +153,7 @@ namespace data
 			size_t ReadString (char * str, std::istream& s);
 			void WriteString (const std::string& str, std::ostream& s);
 			void ExtractCaps (const char * value);
-			const Address * GetAddress (TransportStyle s, bool v4only) const;
+			const Address * GetAddress (TransportStyle s, bool v4only, bool v6only = false) const;
 			void UpdateCapsProperty ();			
 
 		private:

SSU.cpp

@@ -327,7 +327,8 @@ namespace transport
 	void SSUSession::SendSessionCreated (const uint8_t * x)
 	{
 		auto introKey = GetIntroKey ();
-		auto address = i2p::context.GetRouterInfo ().GetSSUAddress ();
+		auto address = IsV6 () ? i2p::context.GetRouterInfo ().GetSSUV6Address () :
+			i2p::context.GetRouterInfo ().GetSSUAddress (true); //v4 only
 		if (!introKey || !address)
 		{
 			LogPrint (eLogError, "SSU is not supported");