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/*
* Copyright (c) 2017 by Farsight Security, Inc.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package nmsg_test
import (
"bytes"
"io"
"math"
"testing"
"github.com/farsightsec/go-nmsg"
)
func testReader(t *testing.T, n, size, mtu int) io.Reader {
buf := new(bytes.Buffer)
// nw := nmsg.NewWriter(w, mtu)
o := nmsg.BufferedOutput(buf)
o.SetMaxSize(mtu, 0)
o.SetSequenced(true)
p, err := nmsg.Payload(testMessage(size))
if err != nil {
t.Error(err.Error())
return nil
}
for i := 0; i < n; i++ {
o.Send(p)
}
o.Close()
t.Logf("testReader: buf = %d bytes (%d, %d, %d)", buf.Len(), n, size, mtu)
return buf
}
func TestInput(t *testing.T) {
for _, mtu := range []int{0, 512, 1500} {
for _, n := range []int{1, 10, 100} {
for _, size := range []int{64, 256, 4096} {
i := nmsg.NewInput(testReader(t, n, size, mtu), mtu)
if i != nil {
c := 0
for {
_, err := i.Recv()
if err != nil {
if err != io.EOF {
t.Error(err)
}
break
}
c++
}
if c < n {
t.Errorf("(%d,%d,%d) expected %d, received %d", n, size, mtu, n, c)
}
}
}
}
}
}
func TestInputFragExpire(t *testing.T) {
// Fragment expiration is not checked here, only in
// coverage.
var readers []io.Reader
npayloads := 10
payloadSize := 512
mtu := 512
for i := 0; i < 1000; i++ {
readers = append(readers, testReader(t, npayloads,
payloadSize, mtu))
}
inp := nmsg.NewInput(io.MultiReader(readers...), 512)
var count int
for ; ; count++ {
_, err := inp.Recv()
if err != nil {
break
}
}
if count != npayloads*1000 {
t.Errorf("missed input, received %d payloads", count)
}
}
func testLoss(t *testing.T, r io.Reader, loss uint64, title string) {
t.Helper()
i := nmsg.NewInput(r, nmsg.MaxContainerSize)
for {
if _, err := i.Recv(); err != nil {
break
}
}
stats := i.Stats()
if stats.LostContainers != loss {
t.Errorf("%s: lost %d (expected %d)", title, stats.LostContainers, loss)
}
}
func TestInputSequenceLoss1(t *testing.T) {
var buf bytes.Buffer
c := nmsg.NewContainer()
c.SetSequenced(true)
c.WriteTo(&buf)
c.WriteTo(&buf)
*c.Nmsg.Sequence++ // skip one
c.WriteTo(&buf)
testLoss(t, &buf, 1, "drop 1")
}
func TestInputSequenceInterleaveLoss1(t *testing.T) {
var buf bytes.Buffer
c1 := nmsg.NewContainer()
c2 := nmsg.NewContainer()
c1.SetSequenced(true)
c2.SetSequenced(true)
c1.WriteTo(&buf)
c2.WriteTo(&buf)
c2.WriteTo(&buf)
c1.WriteTo(&buf)
c2.WriteTo(&buf)
*c1.Nmsg.Sequence++
c1.WriteTo(&buf)
c2.WriteTo(&buf)
testLoss(t, &buf, 1, "interleaved, drop 1")
}
func TestInputSequenceWrap(t *testing.T) {
var buf bytes.Buffer
c := nmsg.NewContainer()
c.SetSequenced(true)
*c.Nmsg.Sequence = math.MaxUint32 - 1
t.Log("sequence", c.Nmsg.GetSequence())
c.WriteTo(&buf)
t.Log("sequence", c.Nmsg.GetSequence())
*c.Nmsg.Sequence++
t.Log("sequence", c.Nmsg.GetSequence())
c.WriteTo(&buf)
t.Log("sequence", c.Nmsg.GetSequence())
testLoss(t, &buf, 1, "wrapped, drop 1")
}
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