mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-26 11:35:35 +00:00
27 lines
768 B
Go
27 lines
768 B
Go
|
// Copyright (c) Tailscale Inc & AUTHORS
|
||
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
||
|
|
|
||
|
|
package neterror
|
||
|
|
|
||
|
|
import (
|
||
|
|
"errors"
|
||
|
|
"os"
|
||
|
|
|
||
|
|
"golang.org/x/sys/unix"
|
||
|
|
)
|
||
|
|
|
||
|
|
func init() {
|
||
|
|
shouldDisableUDPGSO = func(err error) bool {
|
||
|
|
var serr *os.SyscallError
|
||
|
|
if errors.As(err, &serr) {
|
||
|
|
// EIO is returned by udp_send_skb() if the device driver does not
|
||
|
|
// have tx checksumming enabled, which is a hard requirement of
|
||
|
|
// UDP_SEGMENT. See:
|
||
|
|
// https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/man7/udp.7?id=806eabd74910447f21005160e90957bde4db0183#n228
|
||
|
|
// https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/net/ipv4/udp.c?h=v6.2&id=c9c3395d5e3dcc6daee66c6908354d47bf98cb0c#n942
|
||
|
|
return serr.Err == unix.EIO
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
}
|