Any proper way to get remote tcp port and ip address from a NEAppProxyTCPFlow

Question

richard_wang OP

Created Apr ’21

Replies 1

Boosts 0

Participants 2

Hi there,

In order to get the remote tcp port from a NEAppProxyTCPFlow, what I did is:

Code Block (NEAppProxyTCPFlow as! NWHostEndpoint).port

But I do not think that is a good way of achieving it.

Is there any proper way for it?

And I believe the ip address can be fetched by:

Code Block NEAppProxyTCPFlow.remoteHostName

Is that right?

Thanks in advance for any suggestion.

Boost

Answer 1

Systems Engineer OP

Apple

Apr ’21

One way to do this would be to create an extension for NWEndpoint and use the NEAppProxyTCPFlow's remoteEndpoint like so: flow.remoteEndpoint.nwEndpoint.

Code Block swiftextension NetworkExtension.NWEndpoint {
    
    var nwEndpoint: Network.NWEndpoint {
        if let endpoint = self as? NetworkExtension.NWHostEndpoint {
            return Network.NWEndpoint.hostPort(host: NWEndpoint.Host(endpoint.hostname), port: NWEndpoint.Port(endpoint.port)!)
        } else if let endpoint = self as? NetworkExtension.NWBonjourServiceEndpoint {
            return Network.NWEndpoint.service(name: endpoint.name, type: endpoint.type, domain: endpoint.domain, interface: nil)
        } else {
            fatalError()
        }
    }
}

Matt Eaton
DTS Engineering, CoreOS
meaton3@apple.com

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