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package main
import (
"bufio"
"fmt"
"github.com/google/gopacket"
"github.com/google/gopacket/layers"
"github.com/google/gopacket/tcpassembly"
"github.com/google/gopacket/tcpassembly/tcpreader"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"net"
"os"
"sync"
"testing"
"time"
)
func TestImportPcap(t *testing.T) {
wrapper := NewTestStorageWrapper(t)
pcapImporter := newTestPcapImporter(wrapper, "172.17.0.3")
pcapImporter.releaseAssembler(pcapImporter.takeAssembler())
fileName := copyToProcessing(t, "ping_pong_10000.pcap")
sessionID, err := pcapImporter.ImportPcap(fileName)
require.NoError(t, err)
duplicatePcapFileName := copyToProcessing(t, "ping_pong_10000.pcap")
duplicateSessionID, err := pcapImporter.ImportPcap(duplicatePcapFileName)
require.Error(t, err)
assert.Equal(t, sessionID, duplicateSessionID)
assert.Error(t, os.Remove(ProcessingPcapsBasePath + duplicatePcapFileName))
_, isPresent := pcapImporter.GetSession("invalid")
assert.False(t, isPresent)
session := waitSessionCompletion(t, pcapImporter, sessionID)
assert.Equal(t, 15008, session.ProcessedPackets)
assert.Equal(t, 0, session.InvalidPackets)
assert.Equal(t, map[uint16]flowCount{9999: {10004, 5004}}, session.PacketsPerService)
assert.Zero(t, session.ImportingError)
checkSessionEquals(t, wrapper, session)
assert.Error(t, os.Remove(ProcessingPcapsBasePath + fileName))
assert.NoError(t, os.Remove(PcapsBasePath + session.ID + ".pcap"))
wrapper.Destroy(t)
}
func TestCancelImportSession(t *testing.T) {
wrapper := NewTestStorageWrapper(t)
pcapImporter := newTestPcapImporter(wrapper, "172.17.0.3")
fileName := copyToProcessing(t, "ping_pong_10000.pcap")
sessionID, err := pcapImporter.ImportPcap(fileName)
require.NoError(t, err)
assert.False(t, pcapImporter.CancelSession("invalid"))
assert.True(t, pcapImporter.CancelSession(sessionID))
session := waitSessionCompletion(t, pcapImporter, sessionID)
assert.Zero(t, session.CompletedAt)
assert.Equal(t, int64(1270696), session.Size)
assert.Equal(t, 0, session.ProcessedPackets)
assert.Equal(t, 0, session.InvalidPackets)
assert.Equal(t, map[uint16]flowCount{}, session.PacketsPerService)
assert.NotZero(t, session.ImportingError)
checkSessionEquals(t, wrapper, session)
assert.Error(t, os.Remove(ProcessingPcapsBasePath + fileName))
assert.Error(t, os.Remove(PcapsBasePath + sessionID + ".pcap"))
wrapper.Destroy(t)
}
func TestImportNoTcpPackets(t *testing.T) {
wrapper := NewTestStorageWrapper(t)
pcapImporter := newTestPcapImporter(wrapper, "172.17.0.4")
fileName := copyToProcessing(t, "icmp.pcap")
sessionID, err := pcapImporter.ImportPcap(fileName)
require.NoError(t, err)
session := waitSessionCompletion(t, pcapImporter, sessionID)
assert.Equal(t, int64(228024), session.Size)
assert.Equal(t, 2000, session.ProcessedPackets)
assert.Equal(t, 2000, session.InvalidPackets)
assert.Equal(t, map[uint16]flowCount{}, session.PacketsPerService)
assert.Zero(t, session.ImportingError)
checkSessionEquals(t, wrapper, session)
assert.Error(t, os.Remove(ProcessingPcapsBasePath + fileName))
assert.NoError(t, os.Remove(PcapsBasePath + sessionID + ".pcap"))
wrapper.Destroy(t)
}
func newTestPcapImporter(wrapper *TestStorageWrapper, serverIP string) *PcapImporter {
wrapper.AddCollection(ImportingSessions)
serverEndpoint := layers.NewIPEndpoint(net.ParseIP(serverIP))
streamPool := tcpassembly.NewStreamPool(&testStreamFactory{})
return &PcapImporter{
storage: wrapper.Storage,
streamPool: streamPool,
assemblers: make([]*tcpassembly.Assembler, 0, initialAssemblerPoolSize),
sessions: make(map[string]ImportingSession),
mAssemblers: sync.Mutex{},
mSessions: sync.Mutex{},
serverIP: serverEndpoint,
}
}
func waitSessionCompletion(t *testing.T, pcapImporter *PcapImporter, sessionID string) ImportingSession {
session, isPresent := pcapImporter.GetSession(sessionID)
require.True(t, isPresent)
<-session.completed
session, isPresent = pcapImporter.GetSession(sessionID)
assert.True(t, isPresent)
assert.Equal(t, sessionID, session.ID)
return session
}
func checkSessionEquals(t *testing.T, wrapper *TestStorageWrapper, session ImportingSession) {
var result ImportingSession
assert.NoError(t, wrapper.Storage.Find(ImportingSessions).Filter(OrderedDocument{{"_id", session.ID}}).
Context(wrapper.Context).First(&result))
assert.Equal(t, session.StartedAt.Unix(), result.StartedAt.Unix())
assert.Equal(t, session.CompletedAt.Unix(), result.CompletedAt.Unix())
session.StartedAt = time.Time{}
result.StartedAt = time.Time{}
session.CompletedAt = time.Time{}
result.CompletedAt = time.Time{}
session.cancelFunc = nil
session.completed = nil
assert.Equal(t, session, result)
}
func copyToProcessing(t *testing.T, fileName string) string {
newFile := fmt.Sprintf("test-%v-%s", time.Now().UnixNano(), fileName)
require.NoError(t, CopyFile(ProcessingPcapsBasePath + newFile, "test_data/" + fileName))
return newFile
}
type testStreamFactory struct {
}
func (sf *testStreamFactory) New(_, _ gopacket.Flow) tcpassembly.Stream {
reader := tcpreader.NewReaderStream()
go func() {
buffer := bufio.NewReader(&reader)
tcpreader.DiscardBytesToEOF(buffer)
}()
return &reader
}
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