Show protocol enable state and which nodes have each protocol installed.

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/node/main.go

@@ -17,6 +17,7 @@ type Agent struct {
 	name      string
 	secret    string
 	version   string
+	dataDir   string
 	startedAt time.Time
 	mu        sync.RWMutex
 	config    map[string]any
@@ -30,7 +31,6 @@ func main() {
 	}
 	name := env("NODE_NAME", "vpn-node")
 	version := env("AGENT_VERSION", defaultVersion)
-
 	dataDir := env("DATA_DIR", "/var/lib/vpn-node")
 	_ = os.MkdirAll(dataDir, 0o755)
 
@@ -38,6 +38,7 @@ func main() {
 		name:      name,
 		secret:    secret,
 		version:   version,
+		dataDir:   dataDir,
 		startedAt: time.Now().UTC(),
 		config:    map[string]any{},
 	}
@@ -77,23 +78,44 @@ func (a *Agent) auth(next http.HandlerFunc) http.HandlerFunc {
 	}
 }
 
+func stringList(cfg map[string]any, key string) []string {
+	out := []string{}
+	raw, ok := cfg[key]
+	if !ok {
+		return out
+	}
+	switch v := raw.(type) {
+	case []any:
+		for _, item := range v {
+			if s, ok := item.(string); ok && s != "" {
+				out = append(out, s)
+			}
+		}
+	case []string:
+		out = append(out, v...)
+	}
+	return out
+}
+
 func (a *Agent) health(w http.ResponseWriter, _ *http.Request) {
 	a.mu.RLock()
 	defer a.mu.RUnlock()
-	protocols := []string{}
-	if raw, ok := a.config["protocols"].([]any); ok {
-		for _, p := range raw {
-			if s, ok := p.(string); ok {
-				protocols = append(protocols, s)
-			}
-		}
+	enabled := stringList(a.config, "protocols_enabled")
+	if len(enabled) == 0 {
+		enabled = stringList(a.config, "protocols")
+	}
+	installed := stringList(a.config, "protocols_installed")
+	if len(installed) == 0 {
+		installed = append([]string{}, enabled...)
 	}
 	writeJSON(w, map[string]any{
-		"ok":          true,
-		"name":        a.name,
-		"version":     a.version,
-		"uptime_sec":  int64(time.Since(a.startedAt).Seconds()),
-		"protocols":   protocols,
+		"ok":                  true,
+		"name":                a.name,
+		"version":             a.version,
+		"uptime_sec":          int64(time.Since(a.startedAt).Seconds()),
+		"protocols":           enabled,
+		"protocols_installed": installed,
+		"protocols_enabled":   enabled,
 	})
 }
 
@@ -123,7 +145,7 @@ func (a *Agent) configHandler(w http.ResponseWriter, r *http.Request) {
 		a.mu.Lock()
 		a.config = cfg
 		a.mu.Unlock()
-		_ = a.saveConfig("/var/lib/vpn-node/config.json")
+		_ = a.saveConfig(filepath.Join(a.dataDir, "config.json"))
 		writeJSON(w, map[string]any{"ok": true})
 	default:
 		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)