How to get NWEndPoint from device - ios

Question

I am using NWListener, NWBrowser, and NWConnection for a local peer-to-peer discovery app. Because the vc with both the browser and listener initializes them both, I end up connecting with myself. The only way that I could think of to prevent that is to stop execution with a return statement if the connection.endPoint is equal to the device's endPoint eg.
listener?.newConnectionHandler = { (nwConnection) in
if nwConnection.endpoint == self.deviceEndpoint { return }
}
browser?.browseResultsChangedHandler = { (results, changes) in
for result in results {
if result.endpoint == self.deviceEndpoint { return }
}
}
How can I get the device's NWEndPoint?
vc:
var browser: PeerBrowser?
var listener: PeerListener?
override func viewDidLoad() {
super.viewDidLoad()
listener = PeerListener()
browser = PeerBrowser()
}
Listener:
class PeerListener {
var listener: NWListener?
var deviceEndpoint: NWEndPoint?
init() {
self.deviceEndpoint = ???
let tcpOptions = NWProtocolTCP.Options()
// ...
let params = NWParameters(tls: nil, tcp: tcpOptions)
params.includePeerToPeer = true
listener = try? NWListener(using: params)
listener?.service = NWListener.Service(name: "MyName", type: "_myApp._tcp")
listener?.stateUpdateHandler = { (newState) in ... }
listener?.newConnectionHandler = { (nwConnection) in
if nwConnection.endpoint == self.deviceEndpoint { return } // *** STOP EXECUTION HERE ***
// ...
}
}
}
Browser:
class PeerBrowser {
var browser: NWBrowser?
var deviceEndpoint: NWEndPoint?
init() {
self.deviceEndpoint = ???
let params = NWParameters()
params.includePeerToPeer = true
browser = NWBrowser(for: .bonjour(type: "_myApp_.tcp", domain: "local"), using: params)
browser?.stateUpdateHandler = { (newState) in ... }
browser?.browseResultsChangedHandler = { (results, changes) in
for result in results {
if result.endpoint == self.deviceEndpoint { return } // *** STOP EXECUTION HERE ***
// ...
}
}
}
}

Answer 1

The way i fixed this was to include a unique uid (like the current userId) in the message and when it's received I filter.
Send message:
let data = // whatever the data is the currentUID is sent along with it
let message = NWProtocolWebSocket.Metadata(opcode: .text)
let context = NWConnection.ContentContext(identifier: "send", metadata: [message])
connection.send(content: data, contentContext: context, isComplete: true, completion: .contentProcessed({ (error) in
if let error = error { return }
print("Successfully Sent: \(data.count) bytes")
}))
Receive message
connection.receive(minimumIncompleteLength: 1, maximumLength: 4200) { [weak self](data, context, isComplete, error) in
if let err = error { return }
if let data = data, !data.isEmpty {
// parse the data and if the uid in the data is equal to the current user's id then return
}
}