Disable mDNS gathering by default.

go.mod

@@ -5,6 +5,7 @@ go 1.13
 require (
 	github.com/at-wat/ebml-go v0.11.0
 	github.com/gorilla/websocket v1.4.2
+	github.com/pion/ice/v2 v2.0.7
 	github.com/pion/rtcp v1.2.4
 	github.com/pion/rtp v1.6.1
 	github.com/pion/webrtc/v3 v3.0.0-beta.7

group/group.go

@@ -15,10 +15,12 @@ import (
 	"sync"
 	"time"
 
+	"github.com/pion/ice/v2"
 	"github.com/pion/webrtc/v3"
 )
 
 var Directory string
+var UseMDNS bool
 
 type UserError string
 
@@ -143,6 +145,9 @@ func Add(name string, desc *description) (*Group, error) {
 	if groups.groups == nil {
 		groups.groups = make(map[string]*Group)
 		s := webrtc.SettingEngine{}
+		if !UseMDNS {
+			s.SetICEMulticastDNSMode(ice.MulticastDNSModeDisabled)
+		}
 		m := webrtc.MediaEngine{}
 		m.RegisterCodec(webrtc.NewRTPVP8CodecExt(
 			webrtc.DefaultPayloadTypeVP8, 90000,

sfu.go

@@ -38,6 +38,7 @@ func main() {
 		"store memory profile in `file`")
 	flag.StringVar(&mutexprofile, "mutexprofile", "",
 		"store mutex profile in `file`")
+	flag.BoolVar(&group.UseMDNS, "mdns", false, "gather mDNS addresses")
 	flag.Parse()
 
 	if cpuprofile != "" {