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// Copyright 2016, Google, Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree.
package layers
import (
"testing"
"github.com/google/gopacket"
)
func TestTCPOptionKindString(t *testing.T) {
testData := []struct {
o *TCPOption
s string
}{
{&TCPOption{
OptionType: TCPOptionKindNop,
OptionLength: 1,
},
"TCPOption(NOP:)"},
{&TCPOption{
OptionType: TCPOptionKindMSS,
OptionLength: 4,
OptionData: []byte{0x12, 0x34},
},
"TCPOption(MSS:4660 0x1234)"},
{&TCPOption{
OptionType: TCPOptionKindTimestamps,
OptionLength: 10,
OptionData: []byte{0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01},
},
"TCPOption(Timestamps:2/1 0x0000000200000001)"}}
for _, tc := range testData {
if s := tc.o.String(); s != tc.s {
t.Errorf("expected %#v string to be %s, got %s", tc.o, tc.s, s)
}
}
}
func TestTCPSerializePadding(t *testing.T) {
tcp := &TCP{}
tcp.Options = append(tcp.Options, TCPOption{
OptionType: TCPOptionKindNop,
OptionLength: 1,
})
buf := gopacket.NewSerializeBuffer()
opts := gopacket.SerializeOptions{FixLengths: true}
err := gopacket.SerializeLayers(buf, opts, tcp)
if err != nil {
t.Fatal(err)
}
if len(buf.Bytes())%4 != 0 {
t.Errorf("TCP data of len %d not padding to 32 bit boundary", len(buf.Bytes()))
}
}
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