network engine: send nodes in listen confirmation

src/network_engine.cpp

@@ -140,7 +140,7 @@ RequestAnswer::RequestAnswer(ParsedMessage&& msg)
 {}
 
 NetworkEngine::NetworkEngine(Logger& log, Scheduler& scheduler, const int& s, const int& s6)
-    : myid(zeroes), DHT_LOG(log), scheduler(scheduler), dht_socket(s), dht_socket6(s6)
+    : myid(zeroes), DHT_LOG(log), dht_socket(s), dht_socket6(s6), scheduler(scheduler)
 {}
 NetworkEngine::NetworkEngine(InfoHash& myid, NetId net, const int& s, const int& s6, Logger& log, Scheduler& scheduler,
         decltype(NetworkEngine::onError) onError,
@@ -610,6 +610,7 @@ NetworkEngine::process(std::unique_ptr<ParsedMessage>&& msg, const SockAddr& fro
                 DHT_LOG.d(msg->info_hash, node->id, "[node %s] got 'listen' request for %s", node->toString().c_str(), msg->info_hash.toString().c_str());
                 ++in_stats.listen;
                 RequestAnswer answer = onListen(node, msg->info_hash, msg->token, msg->socket_id, std::move(msg->query));
+                auto nnodes = bufferNodes(from.getFamily(), msg->info_hash, msg->want, answer.nodes4, answer.nodes6);
                 sendListenConfirmation(from, msg->tid);
                 break;
             }