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// SPDX-License-Identifier: MIT
// Copyright © 2018 WireGuard LLC. All Rights Reserved.
import SystemConfiguration
class InternetReachability {
enum Status {
case unknown
case notReachable
case reachableOverWiFi
case reachableOverCellular
}
static func currentStatus() -> Status {
var status: Status = .unknown
if let reachabilityRef = InternetReachability.reachabilityRef() {
var flags = SCNetworkReachabilityFlags(rawValue: 0)
SCNetworkReachabilityGetFlags(reachabilityRef, &flags)
status = Status(reachabilityFlags: flags)
}
return status
}
private static func reachabilityRef() -> SCNetworkReachability? {
let addrIn = sockaddr_in(sin_len: UInt8(MemoryLayout<sockaddr_in>.size),
sin_family: sa_family_t(AF_INET),
sin_port: 0,
sin_addr: in_addr(s_addr: 0),
sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
return withUnsafePointer(to: addrIn) { (addrInPtr) -> SCNetworkReachability? in
addrInPtr.withMemoryRebound(to: sockaddr.self, capacity: 1) { (addrPtr) -> SCNetworkReachability? in
return SCNetworkReachabilityCreateWithAddress(nil, addrPtr)
}
}
}
}
extension InternetReachability.Status {
init(reachabilityFlags flags: SCNetworkReachabilityFlags) {
var status: InternetReachability.Status = .notReachable
if flags.contains(.reachable) {
if flags.contains(.isWWAN) {
status = .reachableOverCellular
} else {
status = .reachableOverWiFi
}
}
self = status
}
}
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