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24 lines
440 B
Go
24 lines
440 B
Go
package udp
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import "github.com/v2fly/v2ray-core/v4/common/net"
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// PickPort returns an unused UDP port of the system.
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func PickPort() net.Port {
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conn := pickPort()
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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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func pickPort() *net.UDPConn {
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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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if err != nil {
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conn = pickPort()
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}
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return conn
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}
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