Question

我使用akka.net.Udp发送UDP数据包（下面的代码）。发送到我的本地计算机（127.0.0.1）工作正常，但只要我用另一个IP地址运行相同的代码，akka就会抱怨“无效的参数”（下面的输出）。

任何想法出了什么问题？

package debug

import akka.actor.{Actor, ActorLogging, ActorRef, Props}
import java.net.InetSocketAddress
import akka.io.{IO, Udp}
import akka.util.ByteString


class SocketTest extends Actor with ActorLogging {

  val dest = new InetSocketAddress("131.179.196.46", 6363)       // Invalid argument
  // val dest = new InetSocketAddress("127.0.0.1", 6363)         // works fine
  val udp = context.actorOf(Props(classOf[UDP4]), name="udp4")

  // send
  Thread.sleep(1000)
  udp ! (dest, ByteString("hello world"))

  Thread.sleep(99999)
  def receive = {???}

}

class UDP4 extends Actor with ActorLogging {

  val local = new InetSocketAddress("127.0.0.1", 2222)

  import context.system
  IO(Udp) ! Udp.Bind(self, local)

  def receive: Receive = {
    case Udp.Bound(local) => context.become(ready(sender))
  }

  def ready(connection:ActorRef): Receive = {
    case (remote:InetSocketAddress, data:ByteString) => {
      log.info(s"Send to ${remote}: ${data}")
      connection ! Udp.Send(data, remote)
    }
    case Udp.Received(data, remote) => log.info(s"Receive from ${remote}: ${data}")
    case Udp.Unbind => connection ! Udp.Unbind
    case Udp.Unbound => context.stop(self)
  }

}

使用除本地计算机之外的任何其他目的地输出：

[DEBUG] [06/20/2016 11:54:39.753] [main] [EventStream(akka://Main)] logger log1-Logging$DefaultLogger started
[DEBUG] [06/20/2016 11:54:39.754] [main] [EventStream(akka://Main)] Default Loggers started
[DEBUG] [06/20/2016 11:54:39.851] [Main-akka.actor.default-dispatcher-2] [akka://Main/system/IO-UDP-FF/selectors/$a/0] Successfully bound to [/127.0.0.1:2222]
[INFO] [06/20/2016 11:54:40.783] [Main-akka.actor.default-dispatcher-5] [akka://Main/user/app/udp4] Send to /131.179.196.46:6363: ByteString(104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100)
[DEBUG] [06/20/2016 11:54:40.789] [Main-akka.actor.default-dispatcher-5] [akka://Main/system/IO-UDP-FF/selectors/$a/0] Invalid argument
[DEBUG] [06/20/2016 11:54:40.791] [Main-akka.actor.default-dispatcher-3] [akka://Main/system/IO-UDP-FF/selectors/$a/0] Closing DatagramChannel after being stopped

输出127.0.0.1作为目的地：

[DEBUG] [06/20/2016 11:55:37.213] [main] [EventStream(akka://Main)] logger log1-Logging$DefaultLogger started
[DEBUG] [06/20/2016 11:55:37.214] [main] [EventStream(akka://Main)] Default Loggers started
[DEBUG] [06/20/2016 11:55:37.280] [Main-akka.actor.default-dispatcher-4] [akka://Main/system/IO-UDP-FF/selectors/$a/0] Successfully bound to [/127.0.0.1:2222]
[INFO] [06/20/2016 11:55:38.234] [Main-akka.actor.default-dispatcher-2] [akka://Main/user/app/udp4] Send to /127.0.0.1:6363: ByteString(104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100)

Answer 1

问题出在以下几行：

  val local = new InetSocketAddress("127.0.0.1", 2222)

不仅需要本地绑定：

val local = new InetSocketAddress("0.0.0.0", 2222)

更改此行后，代码就像希望的那样工作。

发送到任何非127.0.0.1的目的地时，Akka UDP：“无效参数”

1 个答案: