new file mode 100644

@@ -0,0 +1,147 @@

+package container

+

+import (

+	"bytes"

+	"context"

+	"fmt"

+	"io"

+	"io/ioutil"

+	"net"

+	"strings"

+	"testing"

+	"time"

+

+	"github.com/docker/docker/api/types"

+	"github.com/docker/docker/api/types/container"

+	"github.com/docker/docker/api/types/network"

+	"github.com/docker/docker/integration/util/request"

+	"github.com/docker/go-connections/nat"

+	"github.com/gotestyourself/gotestyourself/poll"

+	"github.com/gotestyourself/gotestyourself/skip"

+	"github.com/stretchr/testify/assert"

+	"github.com/stretchr/testify/require"

+)

+

+func TestNetworkNat(t *testing.T) {

+	skip.If(t, !testEnv.IsLocalDaemon())

+

+	defer setupTest(t)()

+

+	msg := "it works"

+	startServerContainer(t, msg, 8080)

+

+	endpoint := getExternalAddress(t)

+	conn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", endpoint.String(), 8080))

+	require.NoError(t, err)

+	defer conn.Close()

+

+	data, err := ioutil.ReadAll(conn)

+	require.NoError(t, err)

+	assert.Equal(t, strings.TrimSpace(string(data)), msg)

+}

+

+func TestNetworkLocalhostTCPNat(t *testing.T) {

+	skip.If(t, !testEnv.IsLocalDaemon())

+

+	defer setupTest(t)()

+

+	msg := "hi yall"

+	startServerContainer(t, msg, 8081)

+

+	conn, err := net.Dial("tcp", "localhost:8081")

+	require.NoError(t, err)

+	defer conn.Close()

+

+	data, err := ioutil.ReadAll(conn)

+	require.NoError(t, err)

+	assert.Equal(t, strings.TrimSpace(string(data)), msg)

+}

+

+func TestNetworkLoopbackNat(t *testing.T) {

+	skip.If(t, !testEnv.IsLocalDaemon())

+

+	msg := "it works"

+	startServerContainer(t, msg, 8080)

+

+	endpoint := getExternalAddress(t)

+

+	client := request.NewAPIClient(t)

+	ctx := context.Background()

+	c, err := client.ContainerCreate(ctx,

+		&container.Config{

+			Image: "busybox",

+			Cmd:   []string{"sh", "-c", fmt.Sprintf("stty raw && nc -w 5 %s 8080", endpoint.String())},

+			Tty:   true,

+		},

+		&container.HostConfig{

+			NetworkMode: "container:server",

+		},

+		nil,

+		"")

+	require.NoError(t, err)

+

+	err = client.ContainerStart(ctx, c.ID, types.ContainerStartOptions{})

+	require.NoError(t, err)

+

+	poll.WaitOn(t, containerIsStopped(ctx, client, c.ID), poll.WithDelay(100*time.Millisecond))

+

+	body, err := client.ContainerLogs(ctx, c.ID, types.ContainerLogsOptions{

+		ShowStdout: true,

+	})

+	require.NoError(t, err)

+	defer body.Close()

+

+	var b bytes.Buffer

+	_, err = io.Copy(&b, body)

+	require.NoError(t, err)

+

+	assert.Equal(t, strings.TrimSpace(b.String()), msg)

+}

+

+func startServerContainer(t *testing.T, msg string, port int) string {

+	client := request.NewAPIClient(t)

+	ctx := context.Background()

+

+	c, err := client.ContainerCreate(ctx,

+		&container.Config{

+			Image: "busybox",

+			Cmd:   []string{"sh", "-c", fmt.Sprintf("echo %q | nc -lp %d", msg, port)},

+			ExposedPorts: map[nat.Port]struct{}{

+				nat.Port(fmt.Sprintf("%d/tcp", port)): {},

+			},

+		},

+		&container.HostConfig{

+			PortBindings: nat.PortMap{

+				nat.Port(fmt.Sprintf("%d/tcp", port)): []nat.PortBinding{

+					{

+						HostPort: fmt.Sprintf("%d", port),

+					},

+				},

+			},

+		},

+		&network.NetworkingConfig{},

+		"server",

+	)

+	require.NoError(t, err)

+

+	err = client.ContainerStart(ctx, c.ID, types.ContainerStartOptions{})

+	require.NoError(t, err)

+

+	poll.WaitOn(t, containerIsInState(ctx, client, c.ID, "running"), poll.WithDelay(100*time.Millisecond))

+

+	return c.ID

+}

+

+func getExternalAddress(t *testing.T) net.IP {

+	iface, err := net.InterfaceByName("eth0")

+	skip.If(t, err != nil, "Test not running with `make test-integration`. Interface eth0 not found: %s", err)

+

+	ifaceAddrs, err := iface.Addrs()

+	require.NoError(t, err)

+	assert.NotEqual(t, len(ifaceAddrs), 0)

+

+	ifaceIP, _, err := net.ParseCIDR(ifaceAddrs[0].String())

+	require.NoError(t, err)

+

+	return ifaceIP

+}