Internal change.

PiperOrigin-RevId: 232937200
Change-Id: I5c3709cc8f1313313ff618a45e48c14a3a111cb4

1 files changed, 78 insertions, 0 deletions

diff --git a/pkg/tcpip/link/muxed/injectable_test.go b/pkg/tcpip/link/muxed/injectable_test.go
new file mode 100644
index 000000000..8a1a863ff
--- /dev/null
+++ b/pkg/tcpip/link/muxed/injectable_test.go
@@ -0,0 +1,78 @@
+// Copyright 2019 Google LLC
+//
+// 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 injectable
+
+import (
+	"bytes"
+	"net"
+	"os"
+	"syscall"
+	"testing"
+
+	"gvisor.googlesource.com/gvisor/pkg/tcpip"
+	"gvisor.googlesource.com/gvisor/pkg/tcpip/buffer"
+	"gvisor.googlesource.com/gvisor/pkg/tcpip/link/fdbased"
+	"gvisor.googlesource.com/gvisor/pkg/tcpip/network/ipv4"
+	"gvisor.googlesource.com/gvisor/pkg/tcpip/stack"
+)
+
+func TestMuxedEndpointDispatch(t *testing.T) {
+	endpoint, sock, dstIP := makeMuxedTestEndpoint(t)
+	hdr := buffer.NewPrependable(1)
+	hdr.Prepend(1)[0] = 0xFA
+	packetRoute := stack.Route{RemoteAddress: dstIP}
+
+	endpoint.WritePacket(&packetRoute, hdr,
+		buffer.NewViewFromBytes([]byte{0xFB}).ToVectorisedView(), ipv4.ProtocolNumber)
+
+	buf := make([]byte, 6500)
+	bytesRead, err := sock.Read(buf)
+	if err != nil {
+		t.Fatalf("Unable to read from socketpair: %v", err)
+	}
+	if got, want := buf[:bytesRead], []byte{0xFA, 0xFB}; !bytes.Equal(got, want) {
+		t.Fatalf("Read %v from the socketpair, wanted %v", got, want)
+	}
+}
+
+func TestMuxedEndpointDispatchHdrOnly(t *testing.T) {
+	endpoint, sock, dstIP := makeMuxedTestEndpoint(t)
+	hdr := buffer.NewPrependable(1)
+	hdr.Prepend(1)[0] = 0xFA
+	packetRoute := stack.Route{RemoteAddress: dstIP}
+	endpoint.WritePacket(&packetRoute, hdr,
+		buffer.NewView(0).ToVectorisedView(), ipv4.ProtocolNumber)
+	buf := make([]byte, 6500)
+	bytesRead, err := sock.Read(buf)
+	if err != nil {
+		t.Fatalf("Unable to read from socketpair: %v", err)
+	}
+	if got, want := buf[:bytesRead], []byte{0xFA}; !bytes.Equal(got, want) {
+		t.Fatalf("Read %v from the socketpair, wanted %v", got, want)
+	}
+}
+
+func makeMuxedTestEndpoint(t *testing.T) (*MuxedInjectableEndpoint, *os.File, tcpip.Address) {
+	dstIP := tcpip.Address(net.ParseIP("1.2.3.4").To4())
+	pair, err := syscall.Socketpair(syscall.AF_UNIX,
+		syscall.SOCK_SEQPACKET|syscall.SOCK_CLOEXEC|syscall.SOCK_NONBLOCK, 0)
+	if err != nil {
+		t.Fatal("Failed to create socket pair:", err)
+	}
+	_, underlyingEndpoint := fdbased.NewInjectable(pair[1], 6500)
+	routes := map[tcpip.Address]stack.InjectableLinkEndpoint{dstIP: underlyingEndpoint}
+	_, endpoint := NewMuxedInjectableEndpoint(routes, 6500)
+	return endpoint, os.NewFile(uintptr(pair[0]), "test route end"), dstIP
+}