// +build darwin

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
	var recvanyif error

	control = c.Control(func(fd uintptr) {
		reuseport = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)

		// sys/socket.h: #define	SO_RECV_ANYIF	0x1104
		recvanyif = unix.SetsockoptInt(int(fd), syscall.SOL_SOCKET, 0x1104, 1)
	})

	switch {
	case reuseport != nil:
		return reuseport
	case recvanyif != nil:
		return recvanyif
	default:
		return control
	}
}