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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 muxed
import (
"bytes"
"net"
"os"
"syscall"
"testing"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/buffer"
"gvisor.dev/gvisor/pkg/tcpip/link/fdbased"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
func TestInjectableEndpointRawDispatch(t *testing.T) {
endpoint, sock, dstIP := makeTestInjectableEndpoint(t)
endpoint.InjectOutbound(dstIP, []byte{0xFA})
buf := make([]byte, ipv4.MaxTotalSize)
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 TestInjectableEndpointDispatch(t *testing.T) {
endpoint, sock, dstIP := makeTestInjectableEndpoint(t)
hdr := buffer.NewPrependable(1)
hdr.Prepend(1)[0] = 0xFA
packetRoute := stack.Route{RemoteAddress: dstIP}
endpoint.WritePacket(&packetRoute, nil /* gso */, ipv4.ProtocolNumber, tcpip.PacketBuffer{
Header: hdr,
Data: buffer.NewViewFromBytes([]byte{0xFB}).ToVectorisedView(),
})
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 TestInjectableEndpointDispatchHdrOnly(t *testing.T) {
endpoint, sock, dstIP := makeTestInjectableEndpoint(t)
hdr := buffer.NewPrependable(1)
hdr.Prepend(1)[0] = 0xFA
packetRoute := stack.Route{RemoteAddress: dstIP}
endpoint.WritePacket(&packetRoute, nil /* gso */, ipv4.ProtocolNumber, tcpip.PacketBuffer{
Header: hdr,
Data: buffer.NewView(0).ToVectorisedView(),
})
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 makeTestInjectableEndpoint(t *testing.T) (*InjectableEndpoint, *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, stack.CapabilityNone)
routes := map[tcpip.Address]stack.InjectableLinkEndpoint{dstIP: underlyingEndpoint}
endpoint := NewInjectableEndpoint(routes)
return endpoint, os.NewFile(uintptr(pair[0]), "test route end"), dstIP
}
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