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// Copyright 2018 The GoPacket Authors. 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 pcapgo
import (
"bytes"
"testing"
"time"
"github.com/google/gopacket"
"github.com/google/gopacket/layers"
)
func TestNgWriteSimple(t *testing.T) {
buffer := &bytes.Buffer{}
w, err := NewNgWriter(buffer, layers.LinkTypeEthernet)
if err != nil {
t.Fatal("Opening file failed with: ", err)
}
ci := gopacket.CaptureInfo{
Timestamp: time.Unix(0, 0).UTC(),
Length: len(ngPacketSource[0]),
CaptureLength: len(ngPacketSource[0]),
InterfaceIndex: 0,
}
err = w.WritePacket(ci, ngPacketSource[0])
if err != nil {
t.Fatal("Couldn't write packet", err)
}
err = w.Flush()
if err != nil {
t.Fatal("Couldn't flush buffer", err)
}
interf := DefaultNgInterface
interf.LinkType = layers.LinkTypeEthernet
test := ngFileReadTest{
testContents: bytes.NewReader(buffer.Bytes()),
linkType: layers.LinkTypeEthernet,
sections: []ngFileReadTestSection{
{
sectionInfo: DefaultNgWriterOptions.SectionInfo,
ifaces: []NgInterface{
interf,
},
},
},
packets: []ngFileReadTestPacket{
{
data: ngPacketSource[0],
ci: ci,
},
},
}
ngRunFileReadTest(test, "", false, t)
}
func TestNgWriteComplex(t *testing.T) {
test := ngFileReadTest{
linkType: layers.LinkTypeEthernet,
sections: []ngFileReadTestSection{
{
sectionInfo: NgSectionInfo{
Comment: "A test",
},
ifaces: []NgInterface{
{
Name: "in0",
Comment: "test0",
Description: "some test interface",
LinkType: layers.LinkTypeEthernet,
TimestampResolution: 3,
Statistics: NgInterfaceStatistics{
LastUpdate: time.Unix(1519128000, 195312500).UTC(),
StartTime: time.Unix(1519128000-100, 195312500).UTC(),
EndTime: time.Unix(1519128000, 195312500).UTC(),
PacketsReceived: 100,
PacketsDropped: 1,
},
},
{
Name: "null0",
Description: "some test interface",
Filter: "none",
OS: "not needed",
LinkType: layers.LinkTypeEthernet,
TimestampOffset: 100,
Statistics: NgInterfaceStatistics{
LastUpdate: time.Unix(1519128000, 195312500).UTC(),
},
},
},
},
},
packets: []ngFileReadTestPacket{
{
data: ngPacketSource[0],
ci: gopacket.CaptureInfo{
Timestamp: time.Unix(1519128000-900, 195312500).UTC(),
Length: len(ngPacketSource[0]),
CaptureLength: len(ngPacketSource[0]),
InterfaceIndex: 0,
},
},
{
data: ngPacketSource[4],
ci: gopacket.CaptureInfo{
Timestamp: time.Unix(1519128000-800, 195312500).UTC(),
Length: len(ngPacketSource[4]),
CaptureLength: len(ngPacketSource[4]),
InterfaceIndex: 1,
},
},
{
data: ngPacketSource[1],
ci: gopacket.CaptureInfo{
Timestamp: time.Unix(1519128000-500, 195312500).UTC(),
Length: len(ngPacketSource[1]),
CaptureLength: len(ngPacketSource[1]),
InterfaceIndex: 0,
},
},
{
data: ngPacketSource[2][:96],
ci: gopacket.CaptureInfo{
Timestamp: time.Unix(1519128000-300, 195312500).UTC(),
Length: len(ngPacketSource[2]),
CaptureLength: 96,
InterfaceIndex: 0,
},
},
{
data: ngPacketSource[3],
ci: gopacket.CaptureInfo{
Timestamp: time.Unix(1519128000-200, 195312500).UTC(),
Length: len(ngPacketSource[3]),
CaptureLength: len(ngPacketSource[3]),
InterfaceIndex: 0,
},
},
},
}
buffer := &bytes.Buffer{}
options := NgWriterOptions{
SectionInfo: test.sections[0].sectionInfo,
}
w, err := NewNgWriterInterface(buffer, test.sections[0].ifaces[0], options)
if err != nil {
t.Fatal("Opening file failed with: ", err)
}
packets := test.packets
err = w.WritePacket(packets[0].ci, packets[0].data)
if err != nil {
t.Fatal("Couldn't write packet", err)
}
id, err := w.AddInterface(test.sections[0].ifaces[1])
if err != nil {
t.Fatal("Couldn't add interface", err)
}
if id != 1 {
t.Fatalf("Expected interface id 1, but got %d", id)
}
err = w.WritePacket(packets[1].ci, packets[1].data)
if err != nil {
t.Fatal("Couldn't write packet", err)
}
err = w.WriteInterfaceStats(1, test.sections[0].ifaces[1].Statistics)
if err != nil {
t.Fatal("Couldn't write interface stats", err)
}
err = w.WritePacket(packets[2].ci, packets[2].data)
if err != nil {
t.Fatal("Couldn't write packet", err)
}
err = w.WritePacket(packets[3].ci, packets[3].data)
if err != nil {
t.Fatal("Couldn't write packet", err)
}
err = w.WritePacket(packets[4].ci, packets[4].data)
if err != nil {
t.Fatal("Couldn't write packet", err)
}
err = w.WriteInterfaceStats(0, test.sections[0].ifaces[0].Statistics)
if err != nil {
t.Fatal("Couldn't write interface stats", err)
}
err = w.Flush()
if err != nil {
t.Fatal("Couldn't flush buffer", err)
}
// writer fixes resolution to 9
test.sections[0].ifaces[0].TimestampResolution = 9
test.sections[0].ifaces[1].TimestampResolution = 9
// compensate for offset on interface 1
test.sections[0].ifaces[1].Statistics.LastUpdate = test.sections[0].ifaces[1].Statistics.LastUpdate.Add(100 * time.Second)
test.packets[1].ci.Timestamp = test.packets[1].ci.Timestamp.Add(100 * time.Second)
test.testContents = bytes.NewReader(buffer.Bytes())
ngRunFileReadTest(test, "", false, t)
}
type ngDevNull struct{}
func (w *ngDevNull) Write(p []byte) (n int, err error) {
return len(p), nil
}
func BenchmarkNgWritePacket(b *testing.B) {
ci := gopacket.CaptureInfo{
Timestamp: time.Unix(0x01020304, 0xAA*1000),
Length: 0xABCD,
CaptureLength: 10,
}
data := []byte{9, 8, 7, 6, 5, 4, 3, 2, 1, 0}
w, err := NewNgWriter(&ngDevNull{}, layers.LinkTypeEthernet)
if err != nil {
b.Fatal("Failed creating writer:", err)
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
w.WritePacket(ci, data)
}
}
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