58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
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// Copyright 2016 The Netstack 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 header_test
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import (
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"testing"
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"gvisor.googlesource.com/gvisor/pkg/tcpip/header"
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)
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func TestIPv4(t *testing.T) {
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b := header.IPv4(make([]byte, header.IPv4MinimumSize))
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b.Encode(&header.IPv4Fields{})
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const want = header.IPv4Version
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if v := header.IPVersion(b); v != want {
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t.Fatalf("Bad version, want %v, got %v", want, v)
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}
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}
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func TestIPv6(t *testing.T) {
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b := header.IPv6(make([]byte, header.IPv6MinimumSize))
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b.Encode(&header.IPv6Fields{})
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const want = header.IPv6Version
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if v := header.IPVersion(b); v != want {
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t.Fatalf("Bad version, want %v, got %v", want, v)
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}
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}
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func TestOtherVersion(t *testing.T) {
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const want = header.IPv4Version + header.IPv6Version
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b := make([]byte, 1)
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b[0] = want << 4
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if v := header.IPVersion(b); v != want {
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t.Fatalf("Bad version, want %v, got %v", want, v)
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}
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}
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func TestTooShort(t *testing.T) {
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b := make([]byte, 1)
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b[0] = (header.IPv4Version + header.IPv6Version) << 4
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// Get the version of a zero-length slice.
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const want = -1
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if v := header.IPVersion(b[:0]); v != want {
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t.Fatalf("Bad version, want %v, got %v", want, v)
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}
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// Get the version of a nil slice.
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if v := header.IPVersion(nil); v != want {
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t.Fatalf("Bad version, want %v, got %v", want, v)
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}
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}
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