Network.swift

//
//  Network.swift
//
//  Created by Augus on 9/9/16.
//  Copyright © 2016 iAugus. All rights reserved.
//


// REFERENCE: http://stackoverflow.com/a/25623647

import SystemConfiguration


var isConnectedToNetwork: Bool {
    
    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 false
    }
    
    var flags: SCNetworkReachabilityFlags = []
    if !SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) {
        return false
    }
    
    let isReachable = flags.contains(.reachable)
    let needsConnection = flags.contains(.connectionRequired)
    
    return (isReachable && !needsConnection)
}