Not resolving (iOS client, Linux host) about netservice

[robreuss]

I implemented the delegate for didNotResolve on the iOS (browsing) side and got this error after timeout:

["NSNetServicesErrorCode": -72007, "NSNetServicesErrorDomain": 10]

Again, services are seen by the browser as being on local., just won't resolve. Thanks in advance!

[Bouke]

I cannot reproduce. I have published a service on Linux/RPi using the "dns_sd" branch (avahi). Using the iOS Simulator with the code below, it resolves just fine:

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, NetServiceDelegate {

    var window: UIWindow?
    var service: NetService?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

        service = NetService(domain: "local", type: "_hap._tcp", name: "Thermostaat")
        service!.delegate = self
        service!.resolve(withTimeout: 5)

        return true
    }

    func netServiceWillResolve(_ sender: NetService) {
        NSLog("Will resolve \(sender)")
    }

    func netServiceDidResolveAddress(_ sender: NetService) {
        NSLog("Did resolve \(sender)")
    }

    func netService(_ sender: NetService, didNotResolve errorDict: [String : NSNumber]) {
        NSLog("Did not resolve \(sender), \(errorDict)")
    }
}

Outputs:

2018-12-10 23:17:57.177481+0100 NetServiceTest[44651:2111090] Will resolve <NSNetService 0x60000041aca0> local _hap._tcp Thermostaat -1
2018-12-10 23:17:57.217197+0100 NetServiceTest[44651:2111090] Did resolve <NSNetService 0x60000041aca0> local _hap._tcp Thermostaat 39031

[robreuss]

Still trying to figure this out. Two questions. Is the specification of the domain above as "local" rather than "local." (with a period suffix) a typo or should I be using "local"? Apart from modifying the hostname to include the local domain (in my case, that makes the hostname "ubuntu.local"), are there any configuration changes on the linux side? Thanks!

[robreuss]

BTW, I'm using "master" not "dns_sd" because the later does not compile - errors about "dns_sd.h" not being found.

[robreuss]

Another data point:

When I run "avahi-browse _vmc._tcp. --resolve --verbose" from my raspberry to my ubuntu VM (running bridged networking) I also get a failure to resolve, with this error information (which isn't very helpful):

Server version: avahi 0.6.32-rc; Host name: ubuntu.local
E Ifce Prot Name                                          Type                 Domain
+  ens33 IPv4 Virtual Mobile Controller                     _vmc._tcp            local
Failed to resolve service 'Virtual Mobile Controller' of type '_vmc._tcp' in domain 'local': Timeout reached
: All for now
: Cache exhausted

In contrast, the command does resolve when going from Ubuntu to macOS (which is running Apple's NetService).

[robreuss]

iOS client is now resolving thanks to switching to "dns_sd" branch.