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[程序员] 讨论一个 UDP 问题，关于监听。

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服务器有多个 IP ，UDP 监听 0.0.0.0:1234 ，并接收 UDP 数据。 如果客户端通过其中一个 IP 和 1234 端口向服务器发送了 UDP 数据，怎么获取这个客户端连接的是服务器端那个 IP ？

C 语言我知道是可以用 IP_PKTINFO 套接字选项来实现的。

golang 不是很熟悉，有类似的实现吗？

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