Swift 3如何解决NetService IP？

问题描述：

这里Bonjour是我的代码，我可以接受委托

func netServiceDidResolveAddress(_ sender: NetService) { 
print("netServiceDidResolveAddress service name \(sender.name) of type \(sender.type)," + 
       "port \(sender.port), addresses \(sender.addresses)") 
}

这里是我的结果

netServiceDidResolveAddress服务名称韦伯的类型 _myapp的的Mac mini ._tcp。，端口5678，地址可选（[< 1002162e c0a80205 00000000 00000000>，< 1c1e162e 00000000 fe800000 00000000 00bce7ad 24b4b7e8 08000000>]

c0a80205是IP我找=> 192.168.2.5

和地址为[数据]，苹果表示

服务的地址。这是NSData实例的一个NSArray，其中每个实例都包含一个适用于 connect（2）的单个结构sockaddr。如果服务没有解析地址，或者服务尚未解析，则返回空NSArray 。

我仍然混淆为什么数据不能使用.btyes？正如苹果所说的“这是一个NSArray的NSData实例” 但我不能像NSData一样使用它

如何解析地址为可读的IP字符串？

我之前尝试这一点，但没有得到结果，我只是...

let thedata = NSData(bytes: sender.addresses, length: (sender.addresses?.count)!) 
var storage = sockaddr_storage() 
thedata.getBytes(&storage, length: sizeof(sockaddr_storage)) 

if Int32(storage.ss_family) == AF_INET { 
    let addr4 = withUnsafePointer(&storage) {UnsafePointer<sockaddr_in>($0).pointee } 
    print(inet_ntoa(addr4.sin_addr)); 
}

任何建议将帮助，谢谢

答

OK ......这是不是一个聪明的回答，至少我可以得到读取IP

只要使用本功能来获得IP串

let bonjourDevices = [NetService]() 

let bonjourDevice = bonjourDevices[0] 

let host = self.getIPV4StringfromAddress(address:bonjourDevice.addresses!) 


func getIPV4StringfromAddress(address: [Data] , port : Int) -> String{ 

     let data = address.first! as NSData; 

     var ip1 = UInt8(0) 
     data.getBytes(&ip1, range: NSMakeRange(4, 1)) 

     var ip2 = UInt8(0) 
     data.getBytes(&ip2, range: NSMakeRange(5, 1)) 

     var ip3 = UInt8(0) 
     data.getBytes(&ip3, range: NSMakeRange(6, 1)) 

     var ip4 = UInt8(0) 
     data.getBytes(&ip4, range: NSMakeRange(7, 1)) 

     let ipStr = String(format: "%d.%d.%d.%d:%d",ip1,ip2,ip3,ip4,port); 

     return ipStr; 
    }

答

我可以“T使其与Data工作，但使用NSData，我会用这样的：

extension NSData { 
    func castToCPointer<T>() -> T { 
     let mem = UnsafeMutablePointer<T>.allocate(capacity: MemoryLayout<T.Type>.size) 
     self.getBytes(mem, length: MemoryLayout<T.Type>.size) 
     return mem.move() 
    } 
}

因此，我们必须netServiceDidResolveAddress：

func netServiceDidResolveAddress(_ sender: NetService) { 
    if let addresses = sender.addresses, addresses.count > 0 { 
     for address in addresses { 
      let data = address as NSData 

      let inetAddress: sockaddr_in = data.castToCPointer() 
      if inetAddress.sin_family == __uint8_t(AF_INET) { 
       if let ip = String(cString: inet_ntoa(inetAddress.sin_addr), encoding: .ascii) { 
        // IPv4 
        print(ip) 
       } 
      } else if inetAddress.sin_family == __uint8_t(AF_INET6) { 
       let inetAddress6: sockaddr_in6 = data.castToCPointer() 
       let ipStringBuffer = UnsafeMutablePointer<Int8>.allocate(capacity: Int(INET6_ADDRSTRLEN)) 
       var addr = inetAddress6.sin6_addr 

       if let ipString = inet_ntop(Int32(inetAddress6.sin6_family), &addr, ipStringBuffer, __uint32_t(INET6_ADDRSTRLEN)) { 
        if let ip = String(cString: ipString, encoding: .ascii) { 
         // IPv6 
         print(ip) 
        } 
       } 

       ipStringBuffer.deallocate(capacity: Int(INET6_ADDRSTRLEN)) 
      } 
     } 
    } 
}

我有以下结果（存储IPS显示器前阵列）：

["172.16.10.120", "172.16.8.251", "::", "::82c9:d9a5:2eed:1c87"]

代码由https://gist.github.com/agrippa1994/d8c66a2ded74fb2dd801写入SWIFT 2.3启发和适于夫特3.0

答

下面是我在Swift 3中做到的。

func netServiceDidResolveAddress(_ sender: NetService) { 
    var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST)) 
    guard let data = sender.addresses?.first else { return } 
    data.withUnsafeBytes { (pointer:UnsafePointer<sockaddr>) -> Void in 
     guard getnameinfo(pointer, socklen_t(data.count), &hostname, socklen_t(hostname.count), nil, 0, NI_NUMERICHOST) == 0 else { 
      return 
     } 
    } 
    let ipAddress = String(cString:hostname) 
    print(ipAddress) 
}

Swift 3如何解决NetService IP？

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