exclude DSA floodfills

libi2pd/NetDb.cpp

@@ -240,7 +240,7 @@ namespace data
 					std::unique_lock<std::mutex> l(m_FloodfillsMutex);
 					if (wasFloodfill)
 						m_Floodfills.remove (r);
-					else
+					else if (r->IsEligibleFloodfill ())
 						m_Floodfills.push_back (r);
 				}
 			}
@@ -263,7 +263,7 @@ namespace data
 				if (inserted)
 				{
 					LogPrint (eLogInfo, "NetDb: RouterInfo added: ", ident.ToBase64());
-					if (r->IsFloodfill () && r->IsReachable ()) // floodfill must be reachable
+					if (r->IsFloodfill () && r->IsEligibleFloodfill ()) 
 					{
 						std::unique_lock<std::mutex> l(m_FloodfillsMutex);
 						m_Floodfills.push_back (r);

libi2pd/RouterInfo.h

@@ -184,7 +184,9 @@ namespace data
 			bool IsHidden () const { return m_Caps & eHidden; };
 			bool IsHighBandwidth () const { return m_Caps & RouterInfo::eHighBandwidth; };
 			bool IsExtraBandwidth () const { return m_Caps & RouterInfo::eExtraBandwidth; };
-
+			// floodfill must be reachable and not DSA
+			bool IsEligibleFloodfill () const { return IsReachable () && GetIdentity ()->GetSigningKeyType () != SIGNING_KEY_TYPE_DSA_SHA1; };
+		
 			uint8_t GetCaps () const { return m_Caps; };
 			void SetCaps (uint8_t caps);
 			void SetCaps (const char * caps);