mark loopback convotags as forever

make null handler mark discard data as activity for convotag

llarp/handlers/null.hpp

@@ -48,8 +48,10 @@ namespace llarp
           uint64_t seqno) override
       {
         if (t == service::ProtocolType::Control)
+        {
+          MarkConvoTagActive(tag);
           return true;
-
+        }
         if (t != service::ProtocolType::QUIC)
           return false;
 

llarp/service/endpoint.cpp

@@ -1536,9 +1536,9 @@ namespace llarp
             tag = *maybe;
           else
             tag.Randomize();
-
           PutSenderFor(tag, m_Identity.pub, true);
           MarkConvoTagActive(tag);
+          Sessions()[tag].forever = true;
           Loop()->call_soon([tag, hook]() { hook(tag); });
           return true;
         }

llarp/service/session.cpp

@@ -19,6 +19,8 @@ namespace llarp
     bool
     Session::IsExpired(llarp_time_t now, llarp_time_t lifetime) const
     {
+      if (forever)
+        return false;
       return now > lastUsed && (now - lastUsed > lifetime || intro.IsExpired(now));
     }
 

llarp/service/session.hpp

@@ -26,6 +26,7 @@ namespace llarp
       llarp_time_t lastUsed = 0s;
       uint64_t seqno = 0;
       bool inbound = false;
+      bool forever = false;
 
       util::StatusObject
       ExtractStatus() const;