github.com/gopacket/gopacket@v1.1.0/layers/asf_test.go (about)

     1  // Copyright 2019 The GoPacket Authors. All rights reserved.
     2  //
     3  // Use of this source code is governed by a BSD-style license that can be found
     4  // in the LICENSE file in the root of the source tree.
     5  
     6  package layers
     7  
     8  import (
     9  	"bytes"
    10  	"encoding/hex"
    11  	"testing"
    12  
    13  	"github.com/gopacket/gopacket"
    14  )
    15  
    16  func TestASFDecodeFromBytes(t *testing.T) {
    17  	b, err := hex.DecodeString("000011be4000001000000000000000")
    18  	if err != nil {
    19  		t.Fatalf("Failed to decode ASF message")
    20  	}
    21  
    22  	asf := &ASF{}
    23  	if err := asf.DecodeFromBytes(b, gopacket.NilDecodeFeedback); err != nil {
    24  		t.Fatalf("Unexpected error: %v", err)
    25  	}
    26  	if !bytes.Equal(asf.BaseLayer.Contents, b[:8]) {
    27  		t.Errorf("contents is %v, want %v", asf.BaseLayer.Contents, b[:8])
    28  	}
    29  	if !bytes.Equal(asf.BaseLayer.Payload, b[8:]) {
    30  		t.Errorf("payload is %v, want %v", asf.BaseLayer.Payload, b[8:])
    31  	}
    32  	if asf.Enterprise != ASFRMCPEnterprise {
    33  		t.Errorf("enterprise is %v, want %v", asf.Enterprise, ASFRMCPEnterprise)
    34  	}
    35  	if asf.Type != ASFDataIdentifierPresencePong.Type {
    36  		t.Errorf("type is %v, want %v", asf.Type, ASFDataIdentifierPresencePong)
    37  	}
    38  	if asf.Tag != 0 {
    39  		t.Errorf("tag is %v, want 0", asf.Tag)
    40  	}
    41  	if asf.Length != 16 {
    42  		t.Errorf("length is %v, want 16", asf.Length)
    43  	}
    44  }
    45  
    46  func serializeASF(asf *ASF) ([]byte, error) {
    47  	sb := gopacket.NewSerializeBuffer()
    48  	err := asf.SerializeTo(sb, gopacket.SerializeOptions{
    49  		FixLengths: true,
    50  	})
    51  	return sb.Bytes(), err
    52  }
    53  
    54  func TestASFSerializeTo(t *testing.T) {
    55  	table := []struct {
    56  		layer *ASF
    57  		want  []byte
    58  	}{
    59  		{
    60  			&ASF{
    61  				ASFDataIdentifier: ASFDataIdentifierPresencePing,
    62  			},
    63  			[]byte{0, 0, 0x11, 0xbe, 0x80, 0, 0, 0},
    64  		},
    65  		{
    66  			&ASF{
    67  				ASFDataIdentifier: ASFDataIdentifierPresencePong,
    68  				// ensures length is being overridden - should be encoded to 0
    69  				// as there is no payload
    70  				Length: 1,
    71  			},
    72  			[]byte{0, 0, 0x11, 0xbe, 0x40, 0, 0, 0},
    73  		},
    74  	}
    75  	for _, test := range table {
    76  		b, err := serializeASF(test.layer)
    77  		switch {
    78  		case err != nil && test.want != nil:
    79  			t.Errorf("serialize %v failed with %v, wanted %v", test.layer,
    80  				err, test.want)
    81  		case err == nil && !bytes.Equal(b, test.want):
    82  			t.Errorf("serialize %v = %v, want %v", test.layer, b, test.want)
    83  		}
    84  	}
    85  }