Xray-core/testing/servers/udp/port.go

20 lines
456 B
Go
Raw Permalink Normal View History

2020-11-25 11:01:53 +00:00
package udp
import (
2020-12-04 01:36:16 +00:00
"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/net"
2020-11-25 11:01:53 +00:00
)
// PickPort returns an unused UDP port in the system. The port returned is highly likely to be unused, but not guaranteed.
func PickPort() net.Port {
conn, err := net.ListenUDP("udp4", &net.UDPAddr{
IP: net.LocalHostIP.IP(),
Port: 0,
})
common.Must(err)
defer conn.Close()
addr := conn.LocalAddr().(*net.UDPAddr)
return net.Port(addr.Port)
}