findnodes

internal/mesh/mesh.go

@@ -184,6 +184,9 @@ func (n *Node) Serve() error {
 		n.loopSeeder()
 	}()
 
+	n.wg.Add(1)
+	go func() { defer n.wg.Done(); n.loopPeerExchange() }()
+
 	if n.cfg.EnableDiscovery && n.cfg.DiscoveryAddress != "" {
 		n.wg.Add(2)
 		go func() {
@@ -226,6 +229,43 @@ func (n *Node) Close(ctx context.Context) error {
 
 /*** Loops ***/
 
+func (n *Node) loopPeerExchange() {
+	t := time.NewTicker(30 * time.Second)
+	defer t.Stop()
+	for {
+		select {
+		case <-n.stop:
+			return
+		case <-t.C:
+		}
+		// Seeds abfragen
+		for _, s := range n.cfg.Seeds {
+			if strings.TrimSpace(s) == "" {
+				continue
+			}
+			resp, err := n.client.Get(strings.TrimRight(s, "/") + "/mesh/peers")
+			if err != nil {
+				continue
+			}
+			var list []Peer
+			if json.NewDecoder(resp.Body).Decode(&list) == nil {
+				n.mu.Lock()
+				for _, p := range list {
+					if p.URL == "" || p.URL == n.self.URL {
+						continue
+					}
+					if _, ok := n.peers[p.URL]; !ok {
+						cp := p
+						n.peers[p.URL] = &cp
+					}
+				}
+				n.mu.Unlock()
+			}
+			resp.Body.Close()
+		}
+	}
+}
+
 func (n *Node) loopSeeder() {
 	// attempt to hello known seeds every 5s at start, then every 30s
 	backoff := 5 * time.Second