[multicast_dns] IOS16 can not found any device

[Liberations]

1. ios16 before work normal .update to ios16 ,log report
   SocketException:Send failed (OS Error:No route to host errno=65),address e.0.0.0，port=53535

code below

    EasyLoading.show();
    var isShow = true;
    const String name = '_mymei._tcp.local';
    lanDevices.clear();
    final sets = HashSet<LanDevice>();
    var factory = (dynamic host, int port, {bool reuseAddress = false, bool reusePort = false, int ttl = 0}) {
      return RawDatagramSocket.bind(host, port, reuseAddress: true, reusePort: Platform.isIOS, ttl: ttl);
    };

    var client = MDnsClient(rawDatagramSocketFactory: factory);
    // Start the client with default options.
    await client.start();

    // Get the PTR record for the service.
    await for (final PtrResourceRecord ptr
        in client.lookup<PtrResourceRecord>(ResourceRecordQuery.serverPointer(name))) {
      // Use the domainName from the PTR record to get the SRV record,
      // which will have the port and local hostname.
      // Note that duplicate messages may come through, especially if any
      // other mDNS queries are running elsewhere on the machine.
      await for (final SrvResourceRecord srv
          in client.lookup<SrvResourceRecord>(ResourceRecordQuery.service(ptr.domainName))) {
        // Domain name will be something like "io.flutter.example@some-iphone.local._dartobservatory._tcp.local"
        final String bundleId = ptr.domainName; //.substring(0, ptr.domainName.indexOf('@'));
        print('Dart observatory instance found at${ptr.toString()} '
            '${srv.target}:${srv.port} for "$bundleId".');
        if (srv.port != LocalServer.dnsPort) continue;
        await for (final IPAddressResourceRecord ip
            in client.lookup<IPAddressResourceRecord>(ResourceRecordQuery.addressIPv4(srv.target))) {
          print('IP: ${ip.toString()}');
          sets.add(LanDevice(ptr.domainName.replaceAll('._mymei._tcp.local', ''), ip.address.address));
          lanDevices.clear();
          lanDevices.addAll(sets);
          update(['lanDeviceList']);
          isShow = false;
          EasyLoading.dismiss();
        }
      }
    }
    client.stop();
    if (isShow) {
      EasyLoading.dismiss();
    }
    print('mymeiDevice ${lanDevices.toString()}');
    print('Done.');
  }

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[!] HTTP Host Availability
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      信号灯超时时间已到


! Doctor found issues in 2 categories.

[huycozy]

@Liberations
Please provide the information indicated below:

• Completed exception logs
• Which multicast_dns version are you using? Please retry on the latest version multicast_dns: ^0.3.2+2.
• Also, does the issue happen on lower iOS versions? Or does it only reproduce on iOS 16.0?

Thank you!

[Liberations]

VERSION multicast_dns: ^0.3.2+2
error below. system ios16.0.2 iphone XR

flutter: ** GOING TO ROUTE /TestMulticastDns. isError: [false]
[VERBOSE-2:ui_dart_state.cc(209)] Unhandled Exception: SocketException: Send failed (OS Error: No route to host, errno = 65), address = 0.0.0.0, port = 5353
#0      _NativeSocket.send (dart:io-patch/socket_patch.dart:1213:34)
#1      _RawDatagramSocket.send (dart:io-patch/socket_patch.dart:2450:15)
#2      MDnsClient.lookup (package:multicast_dns/multicast_dns.dart:225:14)
#3      _TestMulticastDnsState.loadDevices (package:playremote/app/modules/home/TestMulticastdNS.dart:61:19)
<asynchronous suspension>
flutter: Done.

@huycozy

[Liberations]

test code below

import 'dart:collection';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:multicast_dns/multicast_dns.dart';

class TestMulticastDns extends StatefulWidget {
  const TestMulticastDns({Key? key}) : super(key: key);

  @override
  State<TestMulticastDns> createState() => _TestMulticastDnsState();
}

class _TestMulticastDnsState extends State<TestMulticastDns> {
  var ips = HashSet<String>();
  var ipsArray = <String>[];
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('test'),
        actions: [ GestureDetector(
            onTap: () {
              loadDevices();
            },
            child: Container(
              color: Colors.red,
              width: 100,
              height: 100,
              child: Center(child: Text('scan')),
            ))],
      ),
      body: ListView.builder(
        itemBuilder: (context, index) {
          return Container(
            child: Text(ipsArray[index]),
          );
        },
        itemCount: ipsArray.length,
      ),
    );
  }

  void loadDevices() async {
    setState(() {
      ips.clear();
      ipsArray.clear();
    });
    const String name = '_mymei._tcp.local';
    var factory = (dynamic host, int port, {bool reuseAddress = false, bool reusePort = false, int ttl = 0}) {
      return RawDatagramSocket.bind(host, port, reuseAddress: true, reusePort: Platform.isIOS, ttl: ttl);
    };

    var client = MDnsClient(rawDatagramSocketFactory: factory);
    // Start the client with default options.
    await client.start();

    // Get the PTR record for the service.
    await for (final PtrResourceRecord ptr
        in client.lookup<PtrResourceRecord>(ResourceRecordQuery.serverPointer(name))) {
      // Use the domainName from the PTR record to get the SRV record,
      // which will have the port and local hostname.
      // Note that duplicate messages may come through, especially if any
      // other mDNS queries are running elsewhere on the machine.
      await for (final SrvResourceRecord srv
          in client.lookup<SrvResourceRecord>(ResourceRecordQuery.service(ptr.domainName))) {
        // Domain name will be something like "io.flutter.example@some-iphone.local._dartobservatory._tcp.local"
        final String bundleId = ptr.domainName; //.substring(0, ptr.domainName.indexOf('@'));
        print('Dart observatory instance found at${ptr.toString()} '
            '${srv.target}:${srv.port} for "$bundleId".');
        await for (final IPAddressResourceRecord ip
            in client.lookup<IPAddressResourceRecord>(ResourceRecordQuery.addressIPv4(srv.target))) {
          print('IP: ${ip.address.host}');
          ips.add(ip.address.host);
          ipsArray.clear();
          setState(() {
            ips.forEach((element) {
              ipsArray.add(element);
            });
          });
        }
      }
    }
    client.stop();
    print('Done.');
  }
}

[Liberations]

lower iOS versions is normal

[Liberations]

Info.plist

<key>NSBonjourServices</key>
	<array>
		<string>_http._tcp</string>
		<string>_mymei._tcp.local</string>
		<string>_dartobservatory._tcp</string>
	</array>

[huycozy]

@Liberations
This issue is similar to #113219 which is reported recently (it's duplicated of #42102).
Closing this issue as a duplicate, so please follow up on #42102 for further updates.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.