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a5ae21a832
Add an enable/disable argument to setDontFragment() in preparation for dynamic enable/disable of peer path MTU discovery. Add getDontFragment() to get the status of the don't fragment bit from a socket. Updates #311 Co-authored-by: James Tucker <james@tailscale.com> Signed-off-by: Val <valerie@tailscale.com>
37 lines
1.2 KiB
Go
37 lines
1.2 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build (!linux && !darwin) || android || ios
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package magicsock
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import (
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"errors"
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)
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// setDontFragment sets the don't fragment sockopt on the underlying connection
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// specified by network, which must be "udp4" or "udp6". See
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// https://datatracker.ietf.org/doc/html/rfc3542#section-11.2 for details on
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// IPv6 fragmentation.
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//
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// Return values:
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// - an error if peer MTU is not supported on this OS
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// - errNoActiveUDP if the underlying connection is not UDP
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// - otherwise, the result of setting the don't fragment bit
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func (c *Conn) setDontFragment(network string, enable bool) error {
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return errors.New("peer path MTU discovery not supported on this OS")
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}
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// getDontFragment gets the don't fragment setting on the underlying connection
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// specified by network, which must be "udp4" or "udp6". Returns true if the
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// underlying connection is UDP and the don't fragment bit is set, otherwise
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// false.
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func (c *Conn) getDontFragment(network string) (bool, error) {
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return false, nil
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}
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// CanPMTUD returns whether this platform supports performing peet path MTU discovery.
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func CanPMTUD() bool {
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return false
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}
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