1 files changed, 131 insertions, 0 deletions
diff --git a/pkg/fdchannel/fdchannel_test.go b/pkg/fdchannel/fdchannel_test.go
new file mode 100644
index 000000000..5d01dc636
--- /dev/null
+++ b/pkg/fdchannel/fdchannel_test.go
@@ -0,0 +1,131 @@
+// 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()
+}