[TASK] split interfaces by listen, send multicast and send unicast (needed by babel)

cmd/yanic-query/main.go

@@ -19,8 +19,11 @@ func main() {
 
 	nodes := runtime.NewNodes(&runtime.Config{})
 
-	collector := respond.NewCollector(nil, nodes, iface, 0)
-	collector.SendPacket(net.ParseIP(dstAddress))
+	collector := respond.NewCollector(nil, nodes, iface, iface, iface, 0)
+	collector.SendPacket(net.UDPAddr{
+		IP:   net.ParseIP(dstAddress),
+		Zone: iface,
+	})
 
 	time.Sleep(time.Second)
 

cmd/yanic/main.go

@@ -42,6 +42,12 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
+	if config.Respondd.InterfaceSendUnicast == "" {
+		config.Respondd.InterfaceSendUnicast = config.Respondd.InterfaceListen
+	}
+	if config.Respondd.InterfaceSendMulticast == "" {
+		config.Respondd.InterfaceSendMulticast = config.Respondd.InterfaceListen
+	}
 
 	connections, err = all.Connect(config.Database.Connection)
 	if err != nil {
@@ -74,7 +80,7 @@ func main() {
 			time.Sleep(delay)
 		}
 
-		collector = respond.NewCollector(connections, nodes, config.Respondd.Interface, config.Respondd.Port)
+		collector = respond.NewCollector(connections, nodes, config.Respondd.InterfaceListen, config.Respondd.InterfaceSendMulticast, config.Respondd.InterfaceSendUnicast, config.Respondd.Port)
 		collector.Start(config.Respondd.CollectInterval.Duration)
 		defer collector.Close()
 	}

config_example.toml

@@ -5,8 +5,13 @@ enable           = true
 synchronize      = "1m"
 # how oftern request per multicast
 collect_interval = "1m"
-# on which interface
+# on which interface to listen
 interface        = "eth0"
+# send unicast request (default: see interface)
+## interface_send_unicast = "eth0"
+# send multicast request (default: see interface)
+# interface_send_multicast = "eth1"
+
 # define a port to listen
 # (no or 0 would choose at port at his own)
 #port = 10001

respond/collector.go

@@ -19,7 +19,8 @@ import (
 type Collector struct {
 	connection         *net.UDPConn   // UDP socket
 	queue              chan *Response // received responses
-	iface      string
+	ifaceSendUnicast   string
+	ifaceSendMulticast string
 	db                 database.Connection
 	nodes              *runtime.Nodes
 	interval           time.Duration // Interval for multicast packets
@@ -27,8 +28,8 @@ type Collector struct {
 }
 
 // NewCollector creates a Collector struct
-func NewCollector(db database.Connection, nodes *runtime.Nodes, iface string, port int) *Collector {
-	linkLocalAddr, err := getLinkLocalAddr(iface)
+func NewCollector(db database.Connection, nodes *runtime.Nodes, ifaceListen string, ifaceSendUnicast string, ifaceSendMulticast string, port int) *Collector {
+	linkLocalAddr, err := getLinkLocalAddr(ifaceListen)
 	if err != nil {
 		log.Panic(err)
 	}
@@ -37,7 +38,7 @@ func NewCollector(db database.Connection, nodes *runtime.Nodes, iface string, po
 	conn, err := net.ListenUDP("udp", &net.UDPAddr{
 		IP:   linkLocalAddr,
 		Port: port,
-		Zone: iface,
+		Zone: ifaceListen,
 	})
 	if err != nil {
 		log.Panic(err)
@@ -48,7 +49,8 @@ func NewCollector(db database.Connection, nodes *runtime.Nodes, iface string, po
 		connection:         conn,
 		db:                 db,
 		nodes:              nodes,
-		iface:      iface,
+		ifaceSendUnicast:   ifaceSendUnicast,
+		ifaceSendMulticast: ifaceSendMulticast,
 		queue:              make(chan *Response, 400),
 		stop:               make(chan interface{}),
 	}
@@ -117,7 +119,10 @@ func (coll *Collector) sendOnce() {
 
 func (coll *Collector) sendMulticast() {
 	log.Println("sending multicast")
-	coll.SendPacket(net.ParseIP(multiCastGroup))
+	coll.SendPacket(net.UDPAddr{
+		IP:   net.ParseIP(multiCastGroup),
+		Zone: coll.ifaceSendMulticast,
+	})
 }
 
 // Send unicast packets to nodes that did not answer the multicast
@@ -132,19 +137,17 @@ func (coll *Collector) sendUnicasts(seenBefore jsontime.Time) {
 	// Send unicast packets
 	log.Printf("sending unicast to %d nodes", len(nodes))
 	for _, node := range nodes {
-		coll.SendPacket(node.Address)
+		coll.SendPacket(net.UDPAddr{
+			IP:   node.Address,
+			Zone: coll.ifaceSendUnicast,
+		})
 		time.Sleep(10 * time.Millisecond)
 	}
 }
 
 // SendPacket sends a UDP request to the given unicast or multicast address
-func (coll *Collector) SendPacket(address net.IP) {
-	addr := net.UDPAddr{
-		IP:   address,
-		Port: port,
-		Zone: coll.iface,
-	}
-
+func (coll *Collector) SendPacket(addr net.UDPAddr) {
+	addr.Port = port
 	if _, err := coll.connection.WriteToUDP([]byte("GET nodeinfo statistics neighbours"), &addr); err != nil {
 		log.Println("WriteToUDP failed:", err)
 	}

runtime/config.go

@@ -11,7 +11,9 @@ type Config struct {
 	Respondd struct {
 		Enable                 bool     `toml:"enable"`
 		Synchronize            Duration `toml:"synchronize"`
-		Interface       string   `toml:"interface"`
+		InterfaceListen        string   `toml:"interface"`
+		InterfaceSendMulticast string   `toml:"interface_send_multicast"`
+		InterfaceSendUnicast   string   `toml:"interface_send_unicast"`
 		Port                   int      `toml:"port"`
 		CollectInterval        Duration `toml:"collect_interval"`
 	}

runtime/config_test.go

@@ -15,7 +15,7 @@ func TestReadConfig(t *testing.T) {
 	assert.NotNil(config)
 
 	assert.True(config.Respondd.Enable)
-	assert.Equal("eth0", config.Respondd.Interface)
+	assert.Equal("eth0", config.Respondd.InterfaceListen)
 	assert.Equal(time.Minute, config.Respondd.CollectInterval.Duration)
 
 	assert.Equal(2, config.Meshviewer.Version)