//

// DeviceGUID.swift

// Telephone

//

// Copyright © 2008-2016 Alexey Kuznetsov

// Copyright © 2016-2022 64 Characters

//

// Telephone is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Telephone is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

// GNU General Public License for more details.

//

import Foundation

import IOKit

struct DeviceGUID {

let dataValue: Data

init() {

dataValue = makeGUID()

}

}

private func makeGUID() -> Data {

let iterator = makeIterator()

guard iterator != 0 else { return Data() }

var mac = Data()

var service = IOIteratorNext(iterator)

while service != 0 {

var parent: io_object_t = 0

let status = IORegistryEntryGetParentEntry(service, kIOServicePlane, &parent)

if status == KERN_SUCCESS {

mac = (IORegistryEntryCreateCFProperty(parent, "IOMACAddress" as CFString, kCFAllocatorDefault, 0).takeRetainedValue() as! CFData) as Data

IOObjectRelease(parent)

}

IOObjectRelease(service)

service = IOIteratorNext(iterator)

}

IOObjectRelease(iterator)

return mac

}

private func makeIterator() -> io_iterator_t {

var port: mach_port_t = 0

var status = IOMainPort(mach_port_t(MACH_PORT_NULL), &port)

guard status == KERN_SUCCESS else { return 0 }

guard let match = IOBSDNameMatching(port, 0, "en0") else { return 0 }

var iterator: io_iterator_t = 0

status = IOServiceGetMatchingServices(port, match, &iterator)

guard status == KERN_SUCCESS else { return 0 }

return iterator

}