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