mirror of
https://git.zx2c4.com/wireguard-go
synced 2024-11-15 01:05:15 +01:00
42 lines
969 B
Go
42 lines
969 B
Go
|
/* SPDX-License-Identifier: MIT
|
||
|
|
*
|
||
|
|
* Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package conn
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"syscall"
|
||
|
|
|
||
|
|
"golang.org/x/sys/unix"
|
||
|
|
)
|
||
|
|
|
||
|
|
func init() {
|
||
|
|
controlFns = append(controlFns,
|
||
|
|
|
||
|
|
// Enable receiving of the packet information (IP_PKTINFO for IPv4,
|
||
|
|
// IPV6_PKTINFO for IPv6) that is used to implement sticky socket support.
|
||
|
|
func(network, address string, c syscall.RawConn) error {
|
||
|
|
var err error
|
||
|
|
switch network {
|
||
|
|
case "udp4":
|
||
|
|
c.Control(func(fd uintptr) {
|
||
|
|
err = unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_PKTINFO, 1)
|
||
|
|
})
|
||
|
|
case "udp6":
|
||
|
|
c.Control(func(fd uintptr) {
|
||
|
|
err = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_RECVPKTINFO, 1)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
err = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_V6ONLY, 1)
|
||
|
|
})
|
||
|
|
default:
|
||
|
|
err = fmt.Errorf("unhandled network: %s: %w", network, unix.EINVAL)
|
||
|
|
}
|
||
|
|
return err
|
||
|
|
},
|
||
|
|
)
|
||
|
|
}
|