檢查設備是否已連接到 iOS 12 中的 VPN

Question

我正在使用下面的代碼（兼容 Swift 3 和 Swift 4）來檢查 iOS 設備上的 VPN 連接，該連接在 iOS 12 及更高版本中不起作用。 如何在 iOS 12 中檢查 VPN 連接

func isVPNConnected() -> Bool {
    let cfDict = CFNetworkCopySystemProxySettings()
    let nsDict = cfDict!.takeRetainedValue() as NSDictionary
    let keys = nsDict["__SCOPED__"] as! NSDictionary

    for key: String in keys.allKeys as! [String] {
        if (key == "tap" || key == "tun" || key == "ppp" || key == "ipsec" || key == "ipsec0") {
            return true
        }
    }
    return false
}

感謝您的幫助。

Answer 1

自 iOS 12 和 iOS 13 以來，密鑰列表已更改

已添加 2 個鍵

utun1 和 utun2

所以函數應該是：

static func isConnectedToVPN() -> Bool {

    let cfDict = CFNetworkCopySystemProxySettings()
    let nsDict = cfDict!.takeRetainedValue() as NSDictionary
    let keys = nsDict["__SCOPED__"] as! NSDictionary
    for key: String in keys.allKeys as! [String] {
           if (key == "tap" || key == "tun" || key == "ppp" || key == "ipsec" || key == "ipsec0" || key == "utun1" || key == "utun2") {
               return true
           }
       }
       return false
}

Answer 2

嘗試將密鑰“utun1”添加到您的支票中（或以“utun”為前綴，后跟一個數字）。

for key: String in keys.allKeys as! [String] {
    if (key == "tap" || key == "tun" || key == "ppp" || key == "ipsec" || key == "ipsec0" || key == "utun1") {
        return true
    }
}
return false

Answer 3

就我而言，我收到了一個ipsec4 ，但該應用程序無法識別 VPN。 因此，我想出了一些不同的東西：

struct VpnChecker {

    private static let vpnProtocolsKeysIdentifiers = [
        "tap", "tun", "ppp", "ipsec", "utun"
    ]

    static func isVpnActive() -> Bool {
        guard let cfDict = CFNetworkCopySystemProxySettings() else { return false }
        let nsDict = cfDict.takeRetainedValue() as NSDictionary
        guard let keys = nsDict["__SCOPED__"] as? NSDictionary,
            let allKeys = keys.allKeys as? [String] else { return false }

        // Checking for tunneling protocols in the keys
        for key in allKeys {
            for protocolId in vpnProtocolsKeysIdentifiers
                where key.starts(with: protocolId) {
                // I use start(with:), so I can cover also `ipsec4`, `ppp0`, `utun0` etc...
                return true
            }
        }
        return false
    }
}

用法： VpnChecker.isVpnActive()

我還寫了一個小博客帖子大約是這里