controlfns_unix.go

//go:build !windows && !linux && !wasm

/* SPDX-License-Identifier: MIT
 *
 * Copyright (C) 2017-2025 WireGuard LLC. All Rights Reserved.
 */

package conn

import (
	"syscall"

	"golang.org/x/sys/unix"
)

func init() {
	socketOpenControlFns = append(socketOpenControlFns,
		func(network, address string, c syscall.RawConn) error {
			return c.Control(func(fd uintptr) {
				_ = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_RCVBUF, socketBufferSize)
				_ = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_SNDBUF, socketBufferSize)
			})
		},
	)

	listenControlFns = append(listenControlFns, func(network, address string, c syscall.RawConn) error {
		if network != "udp6" {
			return nil
		}
		var err error
		c.Control(func(fd uintptr) {
			err = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_V6ONLY, 1)
		})
		return err
	})
}