perform node discovery when there aren't enough nodes

libp2p/Host.cpp

@@ -534,7 +534,8 @@ void Host::run(boost::system::error_code const&)
 	keepAlivePeers();
 	disconnectLatePeers();
 
-	if (m_idealPeerCount && !peerCount())
+	auto c = peerCount();
+	if (m_idealPeerCount && !c)
 		for (auto p: m_peers)
 			if (p.second->shouldReconnect())
 			{
@@ -544,6 +545,9 @@ void Host::run(boost::system::error_code const&)
 				break;
 			}
 	
+	if (c < m_idealPeerCount)
+		m_nodeTable->discover();
+	
 	auto runcb = [this](boost::system::error_code const& error) { run(error); };
 	m_timer->expires_from_now(boost::posix_time::milliseconds(c_timerInterval));
 	m_timer->async_wait(runcb);

libp2p/NodeTable.cpp

@@ -106,6 +106,8 @@ shared_ptr<NodeEntry> NodeTable::addNode(Node const& _node)
 
 void NodeTable::discover()
 {
+	static chrono::steady_clock::time_point s_lastDiscover = chrono::steady_clock::now() - std::chrono::seconds(30);
+	if (chrono::steady_clock::now() > s_lastDiscover + std::chrono::seconds(30))
 		discover(m_node.id);
 }