import Foundation
import SystemConfiguration
let ReachabilityStatusChangedNotification = "ReachabilityStatusChangedNotification"
enum ReachabilityType: CustomStringConvertible {
case wwan
case wiFi
var description: String {
switch self {
case .wwan: return "WWAN"
case .wiFi: return "WiFi"
}
}
}
enum ReachabilityStatus: CustomStringConvertible {
case offline
case online(ReachabilityType)
case unknown
var description: String {
switch self {
case .offline: return "Offline"
case .online(let type): return "Online (\(type))"
case .unknown: return "Unknown"
}
}
}
public class Reach {
func connectionStatus() -> ReachabilityStatus {
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
zeroAddress.sin_family = sa_family_t(AF_INET)
guard let defaultRouteReachability = withUnsafePointer(to: &zeroAddress, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
SCNetworkReachabilityCreateWithAddress(nil, $0)
}
}) else {
return .unknown
}
var flags : SCNetworkReachabilityFlags = []
if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
return .unknown
}
return ReachabilityStatus(reachabilityFlags: flags)
}
func monitorReachabilityChanges() {
let host = "google.com"
var context = SCNetworkReachabilityContext(version: 0, info: nil, retain: nil, release: nil, copyDescription: nil)
let reachability = SCNetworkReachabilityCreateWithName(nil, host)!
SCNetworkReachabilitySetCallback(reachability, { (_, flags, _) in
let status = ReachabilityStatus(reachabilityFlags: flags)
NotificationCenter.default.post(name: Notification.Name(rawValue: ReachabilityStatusChangedNotification),
object: nil,
userInfo: ["Status": status.description])
}, &context)
SCNetworkReachabilityScheduleWithRunLoop(reachability, CFRunLoopGetMain(), RunLoop.Mode.common as CFString)
}
}
extension ReachabilityStatus {
init(reachabilityFlags flags: SCNetworkReachabilityFlags) {
let connectionRequired = flags.contains(.connectionRequired)
let isReachable = flags.contains(.reachable)
let isWWAN = flags.contains(.isWWAN)
if !connectionRequired && isReachable {
if isWWAN {
self = .online(.wwan)
} else {
self = .online(.wiFi)
}
} else {
self = .offline
}
}
}
