mirror of
https://git.zx2c4.com/wireguard-go
synced 2024-11-14 16:55:15 +01:00
177caa7e44
This allows a kernel to support UDP_GRO while not supporting UDP_SEGMENT. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
30 lines
649 B
Go
30 lines
649 B
Go
/* SPDX-License-Identifier: MIT
|
|
*
|
|
* Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
|
|
*/
|
|
|
|
package conn
|
|
|
|
import (
|
|
"net"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
func supportsUDPOffload(conn *net.UDPConn) (txOffload, rxOffload bool) {
|
|
rc, err := conn.SyscallConn()
|
|
if err != nil {
|
|
return
|
|
}
|
|
err = rc.Control(func(fd uintptr) {
|
|
_, errSyscall := unix.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_SEGMENT)
|
|
txOffload = errSyscall == nil
|
|
opt, errSyscall := unix.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_GRO)
|
|
rxOffload = errSyscall == nil && opt == 1
|
|
})
|
|
if err != nil {
|
|
return false, false
|
|
}
|
|
return txOffload, rxOffload
|
|
}
|