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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package p9
import (
"io/ioutil"
"os"
"testing"
"gvisor.dev/gvisor/pkg/fd"
"gvisor.dev/gvisor/pkg/unet"
)
const (
MsgTypeBadEncode = iota + 252
MsgTypeBadDecode
MsgTypeUnregistered
)
func TestSendRecv(t *testing.T) {
server, client, err := unet.SocketPair(false)
if err != nil {
t.Fatalf("socketpair got err %v expected nil", err)
}
defer server.Close()
defer client.Close()
if err := send(client, Tag(1), &Tlopen{}); err != nil {
t.Fatalf("send got err %v expected nil", err)
}
tag, m, err := recv(server, maximumLength, msgRegistry.get)
if err != nil {
t.Fatalf("recv got err %v expected nil", err)
}
if tag != Tag(1) {
t.Fatalf("got tag %v expected 1", tag)
}
if _, ok := m.(*Tlopen); !ok {
t.Fatalf("got message %v expected *Tlopen", m)
}
}
// badDecode overruns on decode.
type badDecode struct{}
func (*badDecode) decode(b *buffer) { b.markOverrun() }
func (*badDecode) encode(b *buffer) {}
func (*badDecode) Type() MsgType { return MsgTypeBadDecode }
func (*badDecode) String() string { return "badDecode{}" }
func TestRecvOverrun(t *testing.T) {
server, client, err := unet.SocketPair(false)
if err != nil {
t.Fatalf("socketpair got err %v expected nil", err)
}
defer server.Close()
defer client.Close()
if err := send(client, Tag(1), &badDecode{}); err != nil {
t.Fatalf("send got err %v expected nil", err)
}
if _, _, err := recv(server, maximumLength, msgRegistry.get); err == nil {
t.Fatalf("recv got err %v expected ErrSocket{ErrNoValidMessage}", err)
}
}
// unregistered is not registered on decode.
type unregistered struct{}
func (*unregistered) decode(b *buffer) {}
func (*unregistered) encode(b *buffer) {}
func (*unregistered) Type() MsgType { return MsgTypeUnregistered }
func (*unregistered) String() string { return "unregistered{}" }
func TestRecvInvalidType(t *testing.T) {
server, client, err := unet.SocketPair(false)
if err != nil {
t.Fatalf("socketpair got err %v expected nil", err)
}
defer server.Close()
defer client.Close()
if err := send(client, Tag(1), &unregistered{}); err != nil {
t.Fatalf("send got err %v expected nil", err)
}
_, _, err = recv(server, maximumLength, msgRegistry.get)
if _, ok := err.(*ErrInvalidMsgType); !ok {
t.Fatalf("recv got err %v expected ErrInvalidMsgType", err)
}
}
func TestSendRecvWithFile(t *testing.T) {
server, client, err := unet.SocketPair(false)
if err != nil {
t.Fatalf("socketpair got err %v expected nil", err)
}
defer server.Close()
defer client.Close()
// Create a tempfile.
osf, err := ioutil.TempFile("", "p9")
if err != nil {
t.Fatalf("tempfile got err %v expected nil", err)
}
os.Remove(osf.Name())
f, err := fd.NewFromFile(osf)
osf.Close()
if err != nil {
t.Fatalf("unable to create file: %v", err)
}
rlopen := &Rlopen{}
rlopen.SetFilePayload(f)
if err := send(client, Tag(1), rlopen); err != nil {
t.Fatalf("send got err %v expected nil", err)
}
// Enable withFile.
tag, m, err := recv(server, maximumLength, msgRegistry.get)
if err != nil {
t.Fatalf("recv got err %v expected nil", err)
}
if tag != Tag(1) {
t.Fatalf("got tag %v expected 1", tag)
}
rlopen, ok := m.(*Rlopen)
if !ok {
t.Fatalf("got m %v expected *Rlopen", m)
}
if rlopen.File == nil {
t.Fatalf("got nil file expected non-nil")
}
}
func TestRecvClosed(t *testing.T) {
server, client, err := unet.SocketPair(false)
if err != nil {
t.Fatalf("socketpair got err %v expected nil", err)
}
defer server.Close()
client.Close()
_, _, err = recv(server, maximumLength, msgRegistry.get)
if err == nil {
t.Fatalf("got err nil expected non-nil")
}
if _, ok := err.(ErrSocket); !ok {
t.Fatalf("got err %v expected ErrSocket", err)
}
}
func TestSendClosed(t *testing.T) {
server, client, err := unet.SocketPair(false)
if err != nil {
t.Fatalf("socketpair got err %v expected nil", err)
}
server.Close()
defer client.Close()
err = send(client, Tag(1), &Tlopen{})
if err == nil {
t.Fatalf("send got err nil expected non-nil")
}
if _, ok := err.(ErrSocket); !ok {
t.Fatalf("got err %v expected ErrSocket", err)
}
}
func BenchmarkSendRecv(b *testing.B) {
b.ReportAllocs()
server, client, err := unet.SocketPair(false)
if err != nil {
b.Fatalf("socketpair got err %v expected nil", err)
}
defer server.Close()
defer client.Close()
// Exchange Rflush messages since these contain no data and therefore incur
// no additional marshaling overhead.
go func() {
for i := 0; i < b.N; i++ {
tag, m, err := recv(server, maximumLength, msgRegistry.get)
if err != nil {
b.Errorf("recv got err %v expected nil", err)
}
if tag != Tag(1) {
b.Errorf("got tag %v expected 1", tag)
}
if _, ok := m.(*Rflush); !ok {
b.Errorf("got message %T expected *Rflush", m)
}
if err := send(server, Tag(2), &Rflush{}); err != nil {
b.Errorf("send got err %v expected nil", err)
}
}
}()
b.ResetTimer()
for i := 0; i < b.N; i++ {
if err := send(client, Tag(1), &Rflush{}); err != nil {
b.Errorf("send got err %v expected nil", err)
}
tag, m, err := recv(client, maximumLength, msgRegistry.get)
if err != nil {
b.Errorf("recv got err %v expected nil", err)
}
if tag != Tag(2) {
b.Errorf("got tag %v expected 2", tag)
}
if _, ok := m.(*Rflush); !ok {
b.Errorf("got message %v expected *Rflush", m)
}
}
}
func init() {
msgRegistry.register(MsgTypeBadDecode, func() message { return &badDecode{} })
}
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