arcast/pkg/server/mdns.go

package server

import (
	"context"

	"forge.cadoles.com/arcad/arcast/pkg/network"
	"github.com/grandcat/zeroconf"
	"github.com/pkg/errors"
	"github.com/wlynxg/anet"
	"gitlab.com/wpetit/goweb/logger"
)

const (
	MDNSService = "_arcast._http._tcp"
	MDNSDomain  = "local."
)

func (s *Server) startMDNServer(ctx context.Context) error {
	logger.Debug(ctx, "starting mdns server")
	ifaces, err := anet.Interfaces()
	if err != nil {
		return errors.WithStack(err)
	}

	ips, err := network.GetLANIPv4Addrs()
	if err != nil {
		return errors.WithStack(err)
	}

	logger.Debug(ctx, "advertising ips", logger.F("ips", ips))

	server, err := zeroconf.RegisterProxy(s.instanceID, MDNSService, MDNSDomain, s.port, s.instanceID, ips, []string{}, ifaces)
	if err != nil {
		return errors.WithStack(err)
	}

	go func() {
		<-ctx.Done()
		logger.Debug(ctx, "closing mdns server")
		server.Shutdown()
	}()

	return nil
}