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29 lines
1009 B
Go
29 lines
1009 B
Go
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// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package controlclient
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import (
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"math"
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"testing"
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"tailscale.com/tailcfg"
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)
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// maxAllowedNoiseVersion is the highest we expect the Tailscale
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// capability version to ever get. It's a value close to 2^16, but
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// with enough leeway that we get a very early warning that it's time
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// to rework the wire protocol to allow larger versions, while still
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// giving us headroom to bump this test and fix the build.
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//
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// Code elsewhere in the client will panic() if the tailcfg capability
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// version exceeds 16 bits, so take a failure of this test seriously.
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const maxAllowedNoiseVersion = math.MaxUint16 - 5000
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func TestNoiseVersion(t *testing.T) {
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if tailcfg.CurrentCapabilityVersion > maxAllowedNoiseVersion {
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t.Fatalf("tailcfg.CurrentCapabilityVersion is %d, want <=%d", tailcfg.CurrentCapabilityVersion, maxAllowedNoiseVersion)
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}
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}
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