2017-11-14 22:45:07 +00:00
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package udp
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import (
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"v2ray.com/core/common"
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"v2ray.com/core/common/net"
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)
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2018-03-01 10:53:39 +00:00
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// PickPort returns an unused UDP port in the system. The port returned is highly likely to be unused, but not guaranteed.
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2017-11-14 22:45:07 +00:00
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func PickPort() net.Port {
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conn, err := net.ListenUDP("udp4", &net.UDPAddr{
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IP: net.LocalHostIP.IP(),
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Port: 0,
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})
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common.Must(err)
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defer conn.Close()
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addr := conn.LocalAddr().(*net.UDPAddr)
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return net.Port(addr.Port)
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}
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