Advertise an AirTame AirPlay server via mDNS (in case it is on a diffrent VLAN)

advertiseAirtameAirplay.go

package main

import (
	"fmt"
	"strings"

	"github.com/9072997/jgh"
	"github.com/godbus/dbus"
	"github.com/holoplot/go-avahi"
)

func advertiseAirplay(hostname, ip, mac string) {
	// mac address without :
	bareMac := strings.ReplaceAll(mac, ":", "")

	conn, err := dbus.SystemBus()
	jgh.PanicOnErr(err)
	a, err := avahi.ServerNew(conn)
	jgh.PanicOnErr(err)
	eg, err := a.EntryGroupNew()
	jgh.PanicOnErr(err)
	err = eg.AddAddress( // add "A" record
		avahi.InterfaceUnspec, // all interfaces
		avahi.ProtoInet,       // ipv4 only
		0,                     // flags?
		hostname+".local.",    // host
		ip,                    // ip
	)
	jgh.PanicOnErr(err)
	err = eg.AddService( // airtunes service
		avahi.InterfaceUnspec, // all interfaces
		avahi.ProtoInet,       // ipv4 only
		0,                     // flags?
		bareMac+"@"+hostname,  // hostname
		"_raop._tcp",          // service name
		"local",               // domain
		hostname+".local.",    // fqdn
		7000,                  // port
		[][]byte{
			[]byte("am=AppleTV5,3"),
			[]byte("ch=2"),
			[]byte("cn=0,1,2,3"),
			[]byte("da=true"),
			[]byte("et=0,3,5"),
			[]byte("ft=0xA7FFFF7,0xE"),
			[]byte("md=0,1,2"),
			[]byte("pk=6DA52274AD060BD57E30D0B072370C198AD7A41CB9D44DBC058DE2AA5FB2DDFE"),
			[]byte("pw=false"),
			[]byte("rhd=5.6.0.0"),
			[]byte("sf=0x4"),
			[]byte("sr=44100"),
			[]byte("ss=16"),
			[]byte("sv=false"),
			[]byte("tp=UDP"),
			[]byte("txtvers=1"),
			[]byte("vn=65537"),
			[]byte("vs=220.68"),
			[]byte("vv=2"),
		},
	)
	jgh.PanicOnErr(err)
	err = eg.AddService( // airplay service
		avahi.InterfaceUnspec, // all interfaces
		avahi.ProtoInet,       // ipv4 only
		0,                     // flags?
		hostname,              // hostname
		"_airplay._tcp",       // service name
		"local",               // domain
		hostname+".local.",    // fqdn
		7000,                  // port
		[][]byte{
			[]byte("deviceid=" + mac),
			[]byte("features=0xA7FFFF7,0xE"),
			[]byte("flags=0x4"),
			[]byte("model=AppleTV5,3"),
			[]byte("pi=6b448552-85ce-4143-a896-e28d12e8a0ab"),
			[]byte("pk=6DA52274AD060BD57E30D0B072370C198AD7A41CB9D44DBC058DE2AA5FB2DDFE"),
			[]byte("pw=0"),
			[]byte("srcvers=220.68"),
			[]byte("vv=2"),
		},
	)
	jgh.PanicOnErr(err)
	err = eg.Commit()
	jgh.PanicOnErr(err)

	fmt.Println("Advertiseing:", hostname, ip, mac)
}

func main() {
	advertiseAirplay("tech-conf", "10.64.16.97", "38:4b:76:e0:0d:9a")
	select {}
}