NWPathMonitor のサンプル

NetworkPlaygroundApp.swift

//
//  NetworkPlaygroundApp.swift
//  NetworkPlayground
//
//  Created by treastrain / Tanaka Ryoga on 2021/09/28.
//

import SwiftUI
import Network

class NetworkMonitor: ObservableObject {
    @Published var status = "Waiting..."
    @Published var availableInterfaces = ""
    @Published var gateways = ""
    @Published var supportsIPv4 = ""
    @Published var supportsIPv6 = ""
    @Published var supportsDNS = ""
    @Published var isConstrained = ""
    @Published var isExpensive = ""
    @Published var debugDescription = ""
    @Published var localEndpoint = ""
    @Published var remoteEndpoint = ""
    @Published var unsatisfiedReason = ""
    
    
    let monitor = NWPathMonitor()
    
    func start() {
        monitor.pathUpdateHandler = { path in
            DispatchQueue.main.async {
                self.status = "\(path.status)"
                self.availableInterfaces = "\(path.availableInterfaces)"
                self.gateways = "\(path.gateways)"
                self.supportsIPv4 = "\(path.supportsIPv4)"
                self.supportsIPv6 = "\(path.supportsIPv6)"
                self.supportsDNS = "\(path.supportsDNS)"
                self.isConstrained = "\(path.isConstrained)"
                self.isExpensive = "\(path.isExpensive)"
                self.debugDescription = "\(path.debugDescription)"
                self.localEndpoint = "\(path.localEndpoint)"
                self.remoteEndpoint = "\(path.remoteEndpoint)"
                self.unsatisfiedReason = "\(path.unsatisfiedReason)"
            }
            print("--------------------")
            print("status:", path.status)
            print("availableInterfaces:", path.availableInterfaces)
            print("gateways:", path.gateways)
            print("supportsIPv4:", path.supportsIPv4)
            print("supportsIPv6:", path.supportsIPv6)
            print("supportsDNS:", path.supportsDNS)
            print("isConstrained:", path.isConstrained)
            print("isExpensive:", path.isExpensive)
            print("debugDescription:", path.debugDescription)
            print("localEndpoint:", path.localEndpoint)
            print("remoteEndpoint:", path.remoteEndpoint)
            print("unsatisfiedReason:", path.unsatisfiedReason)
            print("--------------------")
        }
        monitor.start(queue: .global(qos: .background))
    }
    
    func cancel() {
        monitor.cancel()
    }
}

@main
struct NetworkPlaygroundApp: App {
    @ObservedObject var networkMonitor = NetworkMonitor()
    
    init() {
        networkMonitor.start()
    }
    
    var body: some Scene {
        WindowGroup {
            VStack(alignment: .leading) {
                Group {
                    Text("status: ") + Text(networkMonitor.status)
                    Text("availableInterfaces: ") + Text(networkMonitor.availableInterfaces)
                    Text("gateways: ") + Text(networkMonitor.gateways)
                    Text("supportsIPv4: ") + Text(networkMonitor.supportsIPv4)
                    Text("supportsIPv6: ") + Text(networkMonitor.supportsIPv6)
                    Text("supportsDNS: ") + Text(networkMonitor.supportsDNS)
                    Text("isConstrained: ") + Text(networkMonitor.isConstrained)
                    Text("isExpensive: ") + Text(networkMonitor.isExpensive)
                }
                Group {
                    Text("debugDescription: ") + Text(networkMonitor.debugDescription)
                    Text("localEndpoint: ") + Text(networkMonitor.localEndpoint)
                    Text("remoteEndpoint: ") + Text(networkMonitor.remoteEndpoint)
                    Text("unsatisfiedReason: ") + Text(networkMonitor.unsatisfiedReason)
                }
            }
            .font(.system(.body, design: .monospaced))
        }
    }
}




/**
 # 以下、いろんな端末・環境で動かしてみた例
 
 
 ## iPhone 13 Pro、機内モードにより Wi-Fi・Cellular・Bluetooth オフ
 --------------------
 status: unsatisfied
 availableInterfaces: []
 gateways: []
 supportsIPv4: false
 supportsIPv6: false
 supportsDNS: false
 isConstrained: false
 isExpensive: false
 debugDescription: unsatisfied (No network route)
 localEndpoint: nil
 remoteEndpoint: nil
 unsatisfiedReason: notAvailable
 --------------------
 
 
 ## iPhone 13 Pro、Cellular (5G)、Wi-Fi (IPv6)
 `availableInterfaces: [en0, pdp_ip0]` ということで、Wi-Fi と Cellular が使えることがわかる
 一度 `en0, ipv6, dns` になり、その後 IPv4 over IPv6 になるところが確認できる
 --------------------
 status: satisfied
 availableInterfaces: [en0, pdp_ip0]
 gateways: [fe80::fab7:97ff:fef8:50dc%en0%en0.0]
 supportsIPv4: false
 supportsIPv6: true
 supportsDNS: true
 isConstrained: false
 isExpensive: false
 debugDescription: satisfied (Path is satisfied), interface: en0, ipv6, dns
 localEndpoint: nil
 remoteEndpoint: nil
 unsatisfiedReason: notAvailable
 --------------------
 --------------------
 status: satisfied
 availableInterfaces: [en0, pdp_ip0]
 gateways: [192.168.10.1:0, fe80::fab7:97ff:fef8:50dc%en0%en0.0]
 supportsIPv4: true
 supportsIPv6: true
 supportsDNS: true
 isConstrained: false
 isExpensive: false
 debugDescription: satisfied (Path is satisfied), interface: en0, ipv4, ipv6, dns
 localEndpoint: nil
 remoteEndpoint: nil
 unsatisfiedReason: notAvailable
 --------------------
 
 
 ## iPhone 13 Pro、Cellular (5G)
 `availableInterfaces: [pdp_ip0]` ということで、Cellular のみ使えることがわかる
 `isExpensive: true` となっており、セルラー通信である可能性がみられる
 --------------------
 status: satisfied
 availableInterfaces: [pdp_ip0]
 gateways: [10.170.192.37:0, fe80::39cd:1f70:205:e71a%pdp_ip0%pdp_ip0.0]
 supportsIPv4: true
 supportsIPv6: true
 supportsDNS: true
 isConstrained: false
 isExpensive: true
 debugDescription: satisfied (Path is satisfied), interface: pdp_ip0[lte], ipv4, ipv6, dns, expensive
 localEndpoint: nil
 remoteEndpoint: nil
 unsatisfiedReason: notAvailable
 --------------------
 
 
 ## iPad Air (4th gen. Wi-Fi モデル)、Wi-Fi (IPv6)
 `availableInterfaces: [en0]` ということで、Wi-Fi のみ使えることがわかる
 一度 `en0, ipv6, dns` になり、その後 IPv4 over IPv6 になるところが確認できる
 --------------------
 status: satisfied
 availableInterfaces: [en0]
 gateways: [fe80::fab7:97ff:fef8:50dc%en0%en0.0]
 supportsIPv4: false
 supportsIPv6: true
 supportsDNS: true
 isConstrained: false
 isExpensive: false
 debugDescription: satisfied (Path is satisfied), interface: en0, ipv6, dns
 localEndpoint: nil
 remoteEndpoint: nil
 unsatisfiedReason: notAvailable
 --------------------
 --------------------
 status: satisfied
 availableInterfaces: [en0]
 gateways: [192.168.10.1:0, fe80::fab7:97ff:fef8:50dc%en0%en0.0]
 supportsIPv4: true
 supportsIPv6: true
 supportsDNS: true
 isConstrained: false
 isExpensive: false
 debugDescription: satisfied (Path is satisfied), interface: en0, ipv4, ipv6, dns
 localEndpoint: nil
 remoteEndpoint: nil
 unsatisfiedReason: notAvailable
 --------------------
 
 
 ## iPad Air (4th gen. Wi-Fi モデル)、Ethernet（有線LAN）接続
 `availableInterfaces: [en3]` ということで、Ethernet（有線LAN）接続であることがわかる
 --------------------
 status: satisfied
 availableInterfaces: [en3]
 gateways: [192.168.10.1:0, fe80::fab7:97ff:fef8:50dc%en0%en3.0]
 supportsIPv4: true
 supportsIPv6: true
 supportsDNS: true
 isConstrained: false
 isExpensive: false
 debugDescription: satisfied (Path is satisfied), interface: en3, ipv4, ipv6, dns
 localEndpoint: nil
 remoteEndpoint: nil
 unsatisfiedReason: notAvailable
 --------------------
 
 
 ## iPad Air (4th gen. Wi-Fi モデル)、Ethernet（有線LAN）接続されていて、Wi-Fi にも接続されている
 `availableInterfaces: [en3, en0]` ということで、Ethernet（有線LAN）と Wi-Fi の両方で接続でされていることがわかる
 --------------------
 status: satisfied
 availableInterfaces: [en3, en0]
 gateways: [192.168.10.1:0, fe80::fab7:97ff:fef8:50dc%en0%en3.0]
 supportsIPv4: true
 supportsIPv6: true
 supportsDNS: true
 isConstrained: false
 isExpensive: false
 debugDescription: satisfied (Path is satisfied), interface: en3, ipv4, ipv6, dns
 localEndpoint: nil
 remoteEndpoint: nil
 unsatisfiedReason: notAvailable
 --------------------
 
 
 ## iPad Air (4th gen. Wi-Fi モデル)、Wi-Fi 経由で Cellular (5G) に接続された iPhone 13 Pro にテザリングして接続
 `isConstrained: true` ということで、Low Data Mode（省データモード）が使われていることがわかる
 --------------------
 status: satisfied
 availableInterfaces: [en0]
 gateways: [172.20.10.1:0, fe80::f465:a6ff:fef6:f764%en0%en0.0]
 supportsIPv4: true
 supportsIPv6: true
 supportsDNS: true
 isConstrained: true
 isExpensive: false
 debugDescription: satisfied (Path is satisfied), interface: en0, ipv4, ipv6, dns, constrained
 localEndpoint: nil
 remoteEndpoint: nil
 unsatisfiedReason: notAvailable
 --------------------
 
 
 ## iPad Air (4th gen. Wi-Fi モデル)、Bluetooth 経由で Cellular (5G) に接続された iPhone 13 Pro にテザリングして接続
 `isExpensive: true` となっており、Bluetooth 通信である可能性がみられる
 --------------------
 status: satisfied
 availableInterfaces: [en4]
 gateways: [172.20.10.1:0, fe80::f465:a6ff:fef6:f764%en0%en4.0]
 supportsIPv4: true
 supportsIPv6: true
 supportsDNS: true
 isConstrained: false
 isExpensive: true
 debugDescription: satisfied (Path is satisfied), interface: en4, ipv4, ipv6, dns, expensive
 localEndpoint: nil
 remoteEndpoint: nil
 unsatisfiedReason: notAvailable
 --------------------
 
 
 
 */