/
reuseport.go
35 lines (29 loc) · 993 Bytes
/
reuseport.go
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package tcp
import (
"os"
"strings"
"github.com/libp2p/go-reuseport"
)
// envReuseport is the env variable name used to turn off reuse port.
// It default to true.
const envReuseport = "LIBP2P_TCP_REUSEPORT"
// envReuseportVal stores the value of envReuseport. defaults to true.
var envReuseportVal = true
func init() {
v := strings.ToLower(os.Getenv(envReuseport))
if v == "false" || v == "f" || v == "0" {
envReuseportVal = false
log.Infof("REUSEPORT disabled (LIBP2P_TCP_REUSEPORT=%s)", v)
}
}
// ReuseportIsAvailable returns whether reuseport is available to be used. This
// is here because we want to be able to turn reuseport on and off selectively.
// For now we use an ENV variable, as this handles our pressing need:
//
// LIBP2P_TCP_REUSEPORT=false ipfs daemon
//
// If this becomes a sought after feature, we could add this to the config.
// In the end, reuseport is a stop-gap.
func ReuseportIsAvailable() bool {
return envReuseportVal && reuseport.Available()
}