add yamaha speaker discovery via tcp:50000 and move pollNode to tendrils.go

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cmd/tendrils/main.go

@@ -17,6 +17,7 @@ func main() {
 	noDante := flag.Bool("no-dante", false, "disable Dante discovery")
 	noBMD := flag.Bool("no-bmd", false, "disable Blackmagic discovery")
 	noShure := flag.Bool("no-shure", false, "disable Shure discovery")
+	noYamaha := flag.Bool("no-yamaha", false, "disable Yamaha discovery")
 	logEvents := flag.Bool("log-events", false, "log node events")
 	logNodes := flag.Bool("log-nodes", false, "log full node details on changes")
 	debugARP := flag.Bool("debug-arp", false, "debug ARP discovery")
@@ -28,6 +29,7 @@ func main() {
 	debugDante := flag.Bool("debug-dante", false, "debug Dante discovery")
 	debugBMD := flag.Bool("debug-bmd", false, "debug Blackmagic discovery")
 	debugShure := flag.Bool("debug-shure", false, "debug Shure discovery")
+	debugYamaha := flag.Bool("debug-yamaha", false, "debug Yamaha discovery")
 	flag.Parse()
 
 	t := tendrils.New()
@@ -41,6 +43,7 @@ func main() {
 	t.DisableDante = *noDante
 	t.DisableBMD = *noBMD
 	t.DisableShure = *noShure
+	t.DisableYamaha = *noYamaha
 	t.LogEvents = *logEvents
 	t.LogNodes = *logNodes
 	t.DebugARP = *debugARP
@@ -52,5 +55,6 @@ func main() {
 	t.DebugDante = *debugDante
 	t.DebugBMD = *debugBMD
 	t.DebugShure = *debugShure
+	t.DebugYamaha = *debugYamaha
 	t.Run()
 }

snmp.go

@@ -79,38 +79,6 @@ func (t *Tendrils) connectSNMP(ip net.IP) (*gosnmp.GoSNMP, error) {
 	return snmp, nil
 }
 
-func (t *Tendrils) pollNode(node *Node) {
-	t.nodes.mu.RLock()
-	var ips []net.IP
-	for _, iface := range node.Interfaces {
-		for _, ip := range iface.IPs {
-			if ip.To4() != nil {
-				ips = append(ips, ip)
-			}
-		}
-	}
-	nodeName := node.DisplayName()
-	t.nodes.mu.RUnlock()
-
-	if !t.DisableSNMP {
-		for _, ip := range ips {
-			t.querySNMPDevice(node, ip)
-		}
-	}
-
-	if !t.DisableBMD && nodeName == "" {
-		for _, ip := range ips {
-			t.probeBMDDevice(ip)
-		}
-	}
-
-	if !t.DisableDante {
-		for _, ip := range ips {
-			t.probeDanteDevice(ip)
-		}
-	}
-}
-
 func (t *Tendrils) querySNMPDevice(node *Node, ip net.IP) {
 	snmp, err := t.connectSNMP(ip)
 	if err != nil {

tendrils.go

@@ -26,6 +26,7 @@ type Tendrils struct {
 	DisableDante  bool
 	DisableBMD    bool
 	DisableShure  bool
+	DisableYamaha bool
 	LogEvents     bool
 	LogNodes      bool
 	DebugARP      bool
@@ -37,6 +38,7 @@ type Tendrils struct {
 	DebugDante    bool
 	DebugBMD      bool
 	DebugShure    bool
+	DebugYamaha   bool
 }
 
 func New() *Tendrils {
@@ -213,3 +215,41 @@ func (t *Tendrils) startInterface(ctx context.Context, iface net.Interface) {
 		go t.listenShure(ctx, iface)
 	}
 }
+
+func (t *Tendrils) pollNode(node *Node) {
+	t.nodes.mu.RLock()
+	var ips []net.IP
+	for _, iface := range node.Interfaces {
+		for _, ip := range iface.IPs {
+			if ip.To4() != nil {
+				ips = append(ips, ip)
+			}
+		}
+	}
+	nodeName := node.DisplayName()
+	t.nodes.mu.RUnlock()
+
+	if !t.DisableSNMP {
+		for _, ip := range ips {
+			t.querySNMPDevice(node, ip)
+		}
+	}
+
+	if !t.DisableBMD && nodeName == "" {
+		for _, ip := range ips {
+			t.probeBMDDevice(ip)
+		}
+	}
+
+	if !t.DisableYamaha && nodeName == "" {
+		for _, ip := range ips {
+			t.probeYamahaDevice(ip)
+		}
+	}
+
+	if !t.DisableDante {
+		for _, ip := range ips {
+			t.probeDanteDevice(ip)
+		}
+	}
+}

yamaha.go

@@ -0,0 +1,36 @@
+package tendrils
+
+import (
+	"bufio"
+	"log"
+	"net"
+	"regexp"
+	"time"
+)
+
+var yamahaModelRegex = regexp.MustCompile(`PA-Platform:ModelId\s*=\s*0x[0-9a-fA-F]+\(([^)]+)\)`)
+
+func (t *Tendrils) probeYamahaDevice(ip net.IP) string {
+	conn, err := net.DialTimeout("tcp", net.JoinHostPort(ip.String(), "50000"), 2*time.Second)
+	if err != nil {
+		return ""
+	}
+	defer conn.Close()
+
+	conn.SetReadDeadline(time.Now().Add(2 * time.Second))
+
+	scanner := bufio.NewScanner(conn)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if match := yamahaModelRegex.FindStringSubmatch(line); match != nil {
+			model := match[1]
+			if t.DebugYamaha {
+				log.Printf("[yamaha] %s: found model %s", ip, model)
+			}
+			t.nodes.Update(nil, nil, []net.IP{ip}, "", model, "yamaha")
+			return model
+		}
+	}
+
+	return ""
+}