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// Copyright 2019 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 fdchannel
import (
"io/ioutil"
"os"
"sync"
"syscall"
"testing"
"time"
)
func TestSendRecvFD(t *testing.T) {
sendFile, err := ioutil.TempFile("", "fdchannel_test_")
if err != nil {
t.Fatalf("failed to create temporary file: %v", err)
}
defer sendFile.Close()
chanFDs, err := NewConnectedSockets()
if err != nil {
t.Fatalf("failed to create fdchannel sockets: %v", err)
}
sendEP := NewEndpoint(chanFDs[0])
defer sendEP.Destroy()
recvEP := NewEndpoint(chanFDs[1])
defer recvEP.Destroy()
recvFD, err := recvEP.RecvFDNonblock()
if err != syscall.EAGAIN && err != syscall.EWOULDBLOCK {
t.Errorf("RecvFDNonblock before SendFD: got (%d, %v), wanted (<unspecified>, EAGAIN or EWOULDBLOCK", recvFD, err)
}
if err := sendEP.SendFD(int(sendFile.Fd())); err != nil {
t.Fatalf("SendFD failed: %v", err)
}
recvFD, err = recvEP.RecvFD()
if err != nil {
t.Fatalf("RecvFD failed: %v", err)
}
recvFile := os.NewFile(uintptr(recvFD), "received file")
defer recvFile.Close()
sendInfo, err := sendFile.Stat()
if err != nil {
t.Fatalf("failed to stat sent file: %v", err)
}
sendInfoSys := sendInfo.Sys()
sendStat, ok := sendInfoSys.(*syscall.Stat_t)
if !ok {
t.Fatalf("sent file's FileInfo is backed by unknown type %T", sendInfoSys)
}
recvInfo, err := recvFile.Stat()
if err != nil {
t.Fatalf("failed to stat received file: %v", err)
}
recvInfoSys := recvInfo.Sys()
recvStat, ok := recvInfoSys.(*syscall.Stat_t)
if !ok {
t.Fatalf("received file's FileInfo is backed by unknown type %T", recvInfoSys)
}
if sendStat.Dev != recvStat.Dev || sendStat.Ino != recvStat.Ino {
t.Errorf("sent file (dev=%d, ino=%d) does not match received file (dev=%d, ino=%d)", sendStat.Dev, sendStat.Ino, recvStat.Dev, recvStat.Ino)
}
}
func TestShutdownThenRecvFD(t *testing.T) {
sendFile, err := ioutil.TempFile("", "fdchannel_test_")
if err != nil {
t.Fatalf("failed to create temporary file: %v", err)
}
defer sendFile.Close()
chanFDs, err := NewConnectedSockets()
if err != nil {
t.Fatalf("failed to create fdchannel sockets: %v", err)
}
sendEP := NewEndpoint(chanFDs[0])
defer sendEP.Destroy()
recvEP := NewEndpoint(chanFDs[1])
defer recvEP.Destroy()
recvEP.Shutdown()
if _, err := recvEP.RecvFD(); err == nil {
t.Error("RecvFD succeeded unexpectedly")
}
}
func TestRecvFDThenShutdown(t *testing.T) {
sendFile, err := ioutil.TempFile("", "fdchannel_test_")
if err != nil {
t.Fatalf("failed to create temporary file: %v", err)
}
defer sendFile.Close()
chanFDs, err := NewConnectedSockets()
if err != nil {
t.Fatalf("failed to create fdchannel sockets: %v", err)
}
sendEP := NewEndpoint(chanFDs[0])
defer sendEP.Destroy()
recvEP := NewEndpoint(chanFDs[1])
defer recvEP.Destroy()
var receiverWG sync.WaitGroup
receiverWG.Add(1)
go func() {
defer receiverWG.Done()
if _, err := recvEP.RecvFD(); err == nil {
t.Error("RecvFD succeeded unexpectedly")
}
}()
defer receiverWG.Wait()
time.Sleep(time.Second) // to ensure recvEP.RecvFD() has blocked
recvEP.Shutdown()
}
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