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71029cea2d
This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>
16 lines
502 B
Go
16 lines
502 B
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package tstun
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// DefaultMTU is the Tailscale default MTU for now.
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//
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// wireguard-go defaults to 1420 bytes, which only works if the
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// "outer" MTU is 1500 bytes. This breaks on DSL connections
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// (typically 1492 MTU) and on GCE (1460 MTU?!).
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//
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// 1280 is the smallest MTU allowed for IPv6, which is a sensible
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// "probably works everywhere" setting until we develop proper PMTU
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// discovery.
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const DefaultMTU = 1280
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