for inbound sessions, keep them alive for the default session lifetime, for outbound sessions keep alive for 5 ping intervals

llarp/iwp/session.cpp

@@ -329,7 +329,8 @@ namespace llarp
     {
       if (m_State == State::Ready || m_State == State::LinkIntro)
       {
-        return now > m_LastRX && now - m_LastRX > SessionAliveTimeout;
+        return now > m_LastRX
+            && now - m_LastRX > (m_Inbound ? DefaultLinkSessionLifetime : SessionAliveTimeout);
       }
       return now - m_CreatedAt >= LinkLayerConnectTimeout;
     }

llarp/iwp/session.hpp

@@ -34,7 +34,7 @@ namespace llarp
     /// How often we send a keepalive
     static constexpr std::chrono::milliseconds PingInterval = 5s;
     /// How long we wait for a session to die with no tx from them
-    static constexpr auto SessionAliveTimeout = (PingInterval * 2) + DefaultLinkSessionLifetime;
+    static constexpr auto SessionAliveTimeout = PingInterval * 5;
 
     struct Session : public ILinkSession, public std::enable_shared_from_this<Session>
     {