Problems with Bonjour on iOS

Question

I am trying to create a Bonjour service in my iOS application, but cannot publish it. Only the netServiceWillPublish delegate method is ever called and the service is not displayed using dns-sd.

Here is my code:

 var service: NetService? = nil func start() { createSockets() service = NetService(domain: "test", type: "_test._tcp.", name: "Test", port: Int32(port)) service?.delegate = self service?.startMonitoring() service?.publish() service?.setTXTRecord(NetService.data(fromTXTRecord: [ "model": "AppleTV3,2,1".data(using: .utf8)!, "srcvers": "160.10".data(using: .utf8)!, "features": "0x100009FF".data(using: .utf8)!, "deviceId": "b8:53:ac:43:f3:15".data(using: .utf8)!, "pw": "0".data(using: .utf8)!, "rmodel": "MacBookPro10,2".data(using: .utf8)! ])) } private func createSockets() { ipv4Socket = CFSocketCreate(kCFAllocatorDefault, PF_INET, SOCK_STREAM, IPPROTO_TCP, kCFSocketAutomaticallyReenableAcceptCallBack, socketCallback, nil) var sin = sockaddr_in() memset(&sin, 0, MemoryLayout<sockaddr_in>.size) sin.sin_len = __uint8_t(MemoryLayout<sockaddr_in>.size) sin.sin_family = sa_family_t(AF_INET); /* Address family */ sin.sin_port = in_port_t(port) /* Or a specific port */ sin.sin_addr.s_addr = INADDR_ANY let sincfd = withUnsafePointer(to: &sin) { $0.withMemoryRebound(to: UInt8.self, capacity: MemoryLayout<sockaddr_in>.size) { return CFDataCreate(kCFAllocatorDefault, $0, MemoryLayout<sockaddr_in>.size) } } CFSocketSetAddress(ipv4Socket, sincfd) let socketsource = CFSocketCreateRunLoopSource( kCFAllocatorDefault, ipv4Socket, 0); CFRunLoopAddSource( CFRunLoopGetCurrent(), socketsource, CFRunLoopMode.defaultMode); } 

I'm new to this type of network in iOS, what am I doing wrong here?

Answer 1

Using service?.publish(options: NetService.Options.listenForConnections) and not creating a socket, I fixed the problem.

In the end, publishing this method will automatically create a TCP listener for IPv4 and IPv6 for NetService .

Apple Documentation:

 /* When passed to -publishWithOptions:, in addition to publishing the service, a * TCP listener is started for both IPv4 and IPv6 on the port specified by the * NSNetService. If the listening port can't be opened, an error is reported using * -netService:didNotPublish:. Specify a port number of zero to use a random port. * When -netServiceDidPublish: is called, -port will return the actual listening * port number. Since the listener only supports TCP, the publish will fail with * NSNetServicesBadArgumentError if the NSNetService type does not end with "_tcp". * New incoming connections will be delivered in the form of NSStreams via the * -netService:didAcceptConnectionWithInputStream:outputStream: delegate method. */ @available(iOS 7.0, *) public static var listenForConnections: NetService.Options { get }