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Try to SO_REUSEPORT on UNIX platforms

This commit is contained in:
Neil Alexander 2018-12-05 22:39:04 +00:00
parent 8ade7aed62
commit eae8f9a666
No known key found for this signature in database
GPG Key ID: A02A2019A2BB0944
3 changed files with 36 additions and 1 deletions

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@ -1,6 +1,7 @@
package yggdrasil package yggdrasil
import ( import (
"context"
"fmt" "fmt"
"net" "net"
"time" "time"
@ -35,7 +36,10 @@ func (m *multicast) start() error {
return err return err
} }
listenString := fmt.Sprintf("[::]:%v", addr.Port) listenString := fmt.Sprintf("[::]:%v", addr.Port)
conn, err := net.ListenPacket("udp6", listenString) lc := net.ListenConfig{
Control: multicastReuse,
}
conn, err := lc.ListenPacket(context.Background(), "udp6", listenString)
if err != nil { if err != nil {
return err return err
} }

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@ -0,0 +1,9 @@
// +build !linux,!darwin,!netbsd,!freebsd,!openbsd,!dragonflybsd
package yggdrasil
import "syscall"
func multicastReuse(network string, address string, c syscall.RawConn) error {
return nil
}

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@ -0,0 +1,22 @@
// +build linux darwin netbsd freebsd openbsd dragonflybsd
package yggdrasil
import "syscall"
import "golang.org/x/sys/unix"
func multicastReuse(network string, address string, c syscall.RawConn) error {
var control error
var reuseport error
control = c.Control(func(fd uintptr) {
reuseport = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
})
switch {
case reuseport != nil:
return reuseport
default:
return control
}
}