如何在Windows CE上获取UDP的目标。 [英] How to get the the destination of UDP on Windows CE.

问题描述

大家好。

有人能告诉我如何获取UDP包的目的地。这可能有点令人困惑。

Could someone tell me how to get the destination of a UDP package. It might be a little confusing.

我想知道UDP包是广播（发送到255.255.255.255）还是直接发送给我。

I would like to know whether the UDP package is a broadcast(send to 255.255.255.255) or send to me directly.

      - >在我的申请中，我必须单独处理它们。

     --> In my application ,I have to handle them separately.

互联网上有一些东西： 

There is something over the internet: 

http://stackoverflow.com/questions/5281409/get-destination-address-of-a-received-udp-packet

http://stackoverflow.com/questions/5281409/get-destination-address-of-a-received-udp-packet

我认为：   http：//social.msdn.microsoft.com/Search/en-US？query = IP_PKTINFO& emptyWatermark = true& ac = 4 

And I think : http://social.msdn.microsoft.com/Search/en-US?query=IP_PKTINFO&emptyWatermark=true&ac=4 

int getsockopt(
  (SOCKET) s,      // descriptor identifying a socket 
  (int) IPPROTO_IP,   // level
  (int) IP_PKTINFO, // optname
  (char *) optval, // output buffer,
  (int) optlen,  // size of output buffer
);

可以提供帮助。

但这些功能仅适用于桌面平台。

But these features are only available on desktop platform.

有人可以告诉我如何在Windows CE上执行此操作。 

Could someone tell me how to do this on Windows CE. 

谢谢:)

推荐答案

recvfrom API不提供任何有关发件人地址。您无法区分广播，单播或单播发送。

The recvfrom API doesn't provide any information of the sender address. You can't distinguish between broadcast, unicast or unicast sends.

如果要获取此信息，则需要使用原始套接字。这些在Windows CE 5.0中不可用。有一个
NDIS用户模式/ IO驱动程序，可以是添加到Windows CE Platform Builder中的OS Design。

When you want to get this information you need to use raw sockets. These are not available in Windows CE 5.0. There is a NDIS User-Mode /IO Driver, that can be added to the OS Design in Windows CE Platform Builder.

但Windows Embedded Compact中可能存在原始套接字支持。我目前没有这些信息。

But there might be raw socket support in Windows Embedded Compact. I currently don't have this information.

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