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Diffstat (limited to 'test/packetimpact/runner/packetimpact_test.go')
-rw-r--r--test/packetimpact/runner/packetimpact_test.go359
1 files changed, 4 insertions, 355 deletions
diff --git a/test/packetimpact/runner/packetimpact_test.go b/test/packetimpact/runner/packetimpact_test.go
index cb9bfd5b7..c598bfc29 100644
--- a/test/packetimpact/runner/packetimpact_test.go
+++ b/test/packetimpact/runner/packetimpact_test.go
@@ -18,366 +18,15 @@ package packetimpact_test
import (
"context"
"flag"
- "fmt"
- "io/ioutil"
- "log"
- "math/rand"
- "net"
- "os"
- "os/exec"
- "path"
- "strings"
"testing"
- "time"
- "github.com/docker/docker/api/types/mount"
- "gvisor.dev/gvisor/pkg/test/dockerutil"
- "gvisor.dev/gvisor/test/packetimpact/netdevs"
+ "gvisor.dev/gvisor/test/packetimpact/runner"
)
-// stringList implements flag.Value.
-type stringList []string
-
-// String implements flag.Value.String.
-func (l *stringList) String() string {
- return strings.Join(*l, ",")
-}
-
-// Set implements flag.Value.Set.
-func (l *stringList) Set(value string) error {
- *l = append(*l, value)
- return nil
-}
-
-var (
- native = flag.Bool("native", false, "whether the test should be run natively")
- testbenchBinary = flag.String("testbench_binary", "", "path to the testbench binary")
- tshark = flag.Bool("tshark", false, "use more verbose tshark in logs instead of tcpdump")
- extraTestArgs = stringList{}
- expectFailure = flag.Bool("expect_failure", false, "expect that the test will fail when run")
-
- dutAddr = net.IPv4(0, 0, 0, 10)
- testbenchAddr = net.IPv4(0, 0, 0, 20)
-)
-
-const ctrlPort = "40000"
-
-// logger implements testutil.Logger.
-//
-// Labels logs based on their source and formats multi-line logs.
-type logger string
-
-// Name implements testutil.Logger.Name.
-func (l logger) Name() string {
- return string(l)
-}
-
-// Logf implements testutil.Logger.Logf.
-func (l logger) Logf(format string, args ...interface{}) {
- lines := strings.Split(fmt.Sprintf(format, args...), "\n")
- log.Printf("%s: %s", l, lines[0])
- for _, line := range lines[1:] {
- log.Printf("%*s %s", len(l), "", line)
- }
+func init() {
+ runner.RegisterFlags(flag.CommandLine)
}
func TestOne(t *testing.T) {
- flag.Var(&extraTestArgs, "extra_test_arg", "extra arguments to pass to the testbench")
- flag.Parse()
- if *testbenchBinary == "" {
- t.Fatal("--testbench_binary is missing")
- }
- dockerutil.EnsureSupportedDockerVersion()
- ctx := context.Background()
-
- // Create the networks needed for the test. One control network is needed for
- // the gRPC control packets and one test network on which to transmit the test
- // packets.
- ctrlNet := dockerutil.NewNetwork(ctx, logger("ctrlNet"))
- testNet := dockerutil.NewNetwork(ctx, logger("testNet"))
- for _, dn := range []*dockerutil.Network{ctrlNet, testNet} {
- for {
- if err := createDockerNetwork(ctx, dn); err != nil {
- t.Log("creating docker network:", err)
- const wait = 100 * time.Millisecond
- t.Logf("sleeping %s and will try creating docker network again", wait)
- // This can fail if another docker network claimed the same IP so we'll
- // just try again.
- time.Sleep(wait)
- continue
- }
- break
- }
- defer func(dn *dockerutil.Network) {
- if err := dn.Cleanup(ctx); err != nil {
- t.Errorf("unable to cleanup container %s: %s", dn.Name, err)
- }
- }(dn)
- // Sanity check.
- inspect, err := dn.Inspect(ctx)
- if err != nil {
- t.Fatalf("failed to inspect network %s: %v", dn.Name, err)
- } else if inspect.Name != dn.Name {
- t.Fatalf("name mismatch for network want: %s got: %s", dn.Name, inspect.Name)
- }
-
- }
-
- tmpDir, err := ioutil.TempDir("", "container-output")
- if err != nil {
- t.Fatal("creating temp dir:", err)
- }
- defer os.RemoveAll(tmpDir)
-
- const testOutputDir = "/tmp/testoutput"
-
- // Create the Docker container for the DUT.
- var dut *dockerutil.Container
- if *native {
- dut = dockerutil.MakeNativeContainer(ctx, logger("dut"))
- } else {
- dut = dockerutil.MakeContainer(ctx, logger("dut"))
- }
-
- runOpts := dockerutil.RunOpts{
- Image: "packetimpact",
- CapAdd: []string{"NET_ADMIN"},
- Mounts: []mount.Mount{mount.Mount{
- Type: mount.TypeBind,
- Source: tmpDir,
- Target: testOutputDir,
- ReadOnly: false,
- }},
- }
-
- const containerPosixServerBinary = "/packetimpact/posix_server"
- dut.CopyFiles(&runOpts, "/packetimpact", "/test/packetimpact/dut/posix_server")
-
- conf, hostconf, _ := dut.ConfigsFrom(runOpts, containerPosixServerBinary, "--ip=0.0.0.0", "--port="+ctrlPort)
- hostconf.AutoRemove = true
- hostconf.Sysctls = map[string]string{"net.ipv6.conf.all.disable_ipv6": "0"}
-
- if err := dut.CreateFrom(ctx, conf, hostconf, nil); err != nil {
- t.Fatalf("unable to create container %s: %v", dut.Name, err)
- }
-
- defer dut.CleanUp(ctx)
-
- // Add ctrlNet as eth1 and testNet as eth2.
- const testNetDev = "eth2"
- if err := addNetworks(ctx, dut, dutAddr, []*dockerutil.Network{ctrlNet, testNet}); err != nil {
- t.Fatal(err)
- }
-
- if err := dut.Start(ctx); err != nil {
- t.Fatalf("unable to start container %s: %s", dut.Name, err)
- }
-
- if _, err := dut.WaitForOutput(ctx, "Server listening.*\n", 60*time.Second); err != nil {
- t.Fatalf("%s on container %s never listened: %s", containerPosixServerBinary, dut.Name, err)
- }
-
- dutTestDevice, dutDeviceInfo, err := deviceByIP(ctx, dut, addressInSubnet(dutAddr, *testNet.Subnet))
- if err != nil {
- t.Fatal(err)
- }
-
- remoteMAC := dutDeviceInfo.MAC
- remoteIPv6 := dutDeviceInfo.IPv6Addr
- // Netstack as DUT doesn't assign IPv6 addresses automatically so do it if
- // needed.
- if remoteIPv6 == nil {
- if _, err := dut.Exec(ctx, dockerutil.ExecOpts{}, "ip", "addr", "add", netdevs.MACToIP(remoteMAC).String(), "scope", "link", "dev", dutTestDevice); err != nil {
- t.Fatalf("unable to ip addr add on container %s: %s", dut.Name, err)
- }
- // Now try again, to make sure that it worked.
- _, dutDeviceInfo, err = deviceByIP(ctx, dut, addressInSubnet(dutAddr, *testNet.Subnet))
- if err != nil {
- t.Fatal(err)
- }
- remoteIPv6 = dutDeviceInfo.IPv6Addr
- if remoteIPv6 == nil {
- t.Fatal("unable to set IPv6 address on container", dut.Name)
- }
- }
-
- // Create the Docker container for the testbench.
- testbench := dockerutil.MakeNativeContainer(ctx, logger("testbench"))
-
- tbb := path.Base(*testbenchBinary)
- containerTestbenchBinary := "/packetimpact/" + tbb
- runOpts = dockerutil.RunOpts{
- Image: "packetimpact",
- CapAdd: []string{"NET_ADMIN"},
- Mounts: []mount.Mount{mount.Mount{
- Type: mount.TypeBind,
- Source: tmpDir,
- Target: testOutputDir,
- ReadOnly: false,
- }},
- }
- testbench.CopyFiles(&runOpts, "/packetimpact", "/test/packetimpact/tests/"+tbb)
-
- // Run tcpdump in the test bench unbuffered, without DNS resolution, just on
- // the interface with the test packets.
- snifferArgs := []string{
- "tcpdump",
- "-S", "-vvv", "-U", "-n",
- "-i", testNetDev,
- "-w", testOutputDir + "/dump.pcap",
- }
- snifferRegex := "tcpdump: listening.*\n"
- if *tshark {
- // Run tshark in the test bench unbuffered, without DNS resolution, just on
- // the interface with the test packets.
- snifferArgs = []string{
- "tshark", "-V", "-l", "-n", "-i", testNetDev,
- "-o", "tcp.check_checksum:TRUE",
- "-o", "udp.check_checksum:TRUE",
- }
- snifferRegex = "Capturing on.*\n"
- }
-
- defer func() {
- if err := exec.Command("/bin/cp", "-r", tmpDir, os.Getenv("TEST_UNDECLARED_OUTPUTS_DIR")).Run(); err != nil {
- t.Error("unable to copy container output files:", err)
- }
- }()
-
- conf, hostconf, _ = testbench.ConfigsFrom(runOpts, snifferArgs...)
- hostconf.AutoRemove = true
- hostconf.Sysctls = map[string]string{"net.ipv6.conf.all.disable_ipv6": "0"}
-
- if err := testbench.CreateFrom(ctx, conf, hostconf, nil); err != nil {
- t.Fatalf("unable to create container %s: %s", testbench.Name, err)
- }
- defer testbench.CleanUp(ctx)
-
- // Add ctrlNet as eth1 and testNet as eth2.
- if err := addNetworks(ctx, testbench, testbenchAddr, []*dockerutil.Network{ctrlNet, testNet}); err != nil {
- t.Fatal(err)
- }
-
- if err := testbench.Start(ctx); err != nil {
- t.Fatalf("unable to start container %s: %s", testbench.Name, err)
- }
-
- // Kill so that it will flush output.
- defer func() {
- time.Sleep(1 * time.Second)
- testbench.Exec(ctx, dockerutil.ExecOpts{}, "killall", snifferArgs[0])
- }()
-
- if _, err := testbench.WaitForOutput(ctx, snifferRegex, 60*time.Second); err != nil {
- t.Fatalf("sniffer on %s never listened: %s", dut.Name, err)
- }
-
- // Because the Linux kernel receives the SYN-ACK but didn't send the SYN it
- // will issue an RST. To prevent this IPtables can be used to filter out all
- // incoming packets. The raw socket that packetimpact tests use will still see
- // everything.
- for _, bin := range []string{"iptables", "ip6tables"} {
- if logs, err := testbench.Exec(ctx, dockerutil.ExecOpts{}, bin, "-A", "INPUT", "-i", testNetDev, "-p", "tcp", "-j", "DROP"); err != nil {
- t.Fatalf("unable to Exec %s on container %s: %s, logs from testbench:\n%s", bin, testbench.Name, err, logs)
- }
- }
-
- // FIXME(b/156449515): Some piece of the system has a race. The old
- // bash script version had a sleep, so we have one too. The race should
- // be fixed and this sleep removed.
- time.Sleep(time.Second)
-
- // Start a packetimpact test on the test bench. The packetimpact test sends
- // and receives packets and also sends POSIX socket commands to the
- // posix_server to be executed on the DUT.
- testArgs := []string{containerTestbenchBinary}
- testArgs = append(testArgs, extraTestArgs...)
- testArgs = append(testArgs,
- "--posix_server_ip", addressInSubnet(dutAddr, *ctrlNet.Subnet).String(),
- "--posix_server_port", ctrlPort,
- "--remote_ipv4", addressInSubnet(dutAddr, *testNet.Subnet).String(),
- "--local_ipv4", addressInSubnet(testbenchAddr, *testNet.Subnet).String(),
- "--remote_ipv6", remoteIPv6.String(),
- "--remote_mac", remoteMAC.String(),
- "--remote_interface_id", fmt.Sprintf("%d", dutDeviceInfo.ID),
- "--device", testNetDev,
- fmt.Sprintf("--native=%t", *native),
- )
- testbenchLogs, err := testbench.Exec(ctx, dockerutil.ExecOpts{}, testArgs...)
- if (err != nil) != *expectFailure {
- var dutLogs string
- if logs, err := dut.Logs(ctx); err != nil {
- dutLogs = fmt.Sprintf("failed to fetch DUT logs: %s", err)
- } else {
- dutLogs = logs
- }
-
- t.Errorf(`test error: %v, expect failure: %t
-
-====== Begin of DUT Logs ======
-
-%s
-
-====== End of DUT Logs ======
-
-====== Begin of Testbench Logs ======
-
-%s
-
-====== End of Testbench Logs ======`,
- err, *expectFailure, dutLogs, testbenchLogs)
- }
-}
-
-func addNetworks(ctx context.Context, d *dockerutil.Container, addr net.IP, networks []*dockerutil.Network) error {
- for _, dn := range networks {
- ip := addressInSubnet(addr, *dn.Subnet)
- // Connect to the network with the specified IP address.
- if err := dn.Connect(ctx, d, ip.String(), ""); err != nil {
- return fmt.Errorf("unable to connect container %s to network %s: %w", d.Name, dn.Name, err)
- }
- }
- return nil
-}
-
-// addressInSubnet combines the subnet provided with the address and returns a
-// new address. The return address bits come from the subnet where the mask is 1
-// and from the ip address where the mask is 0.
-func addressInSubnet(addr net.IP, subnet net.IPNet) net.IP {
- var octets []byte
- for i := 0; i < 4; i++ {
- octets = append(octets, (subnet.IP.To4()[i]&subnet.Mask[i])+(addr.To4()[i]&(^subnet.Mask[i])))
- }
- return net.IP(octets)
-}
-
-// createDockerNetwork makes a randomly-named network that will start with the
-// namePrefix. The network will be a random /24 subnet.
-func createDockerNetwork(ctx context.Context, n *dockerutil.Network) error {
- randSource := rand.NewSource(time.Now().UnixNano())
- r1 := rand.New(randSource)
- // Class C, 192.0.0.0 to 223.255.255.255, transitionally has mask 24.
- ip := net.IPv4(byte(r1.Intn(224-192)+192), byte(r1.Intn(256)), byte(r1.Intn(256)), 0)
- n.Subnet = &net.IPNet{
- IP: ip,
- Mask: ip.DefaultMask(),
- }
- return n.Create(ctx)
-}
-
-// deviceByIP finds a deviceInfo and device name from an IP address.
-func deviceByIP(ctx context.Context, d *dockerutil.Container, ip net.IP) (string, netdevs.DeviceInfo, error) {
- out, err := d.Exec(ctx, dockerutil.ExecOpts{}, "ip", "addr", "show")
- if err != nil {
- return "", netdevs.DeviceInfo{}, fmt.Errorf("listing devices on %s container: %w\n%s", d.Name, err, out)
- }
- devs, err := netdevs.ParseDevices(out)
- if err != nil {
- return "", netdevs.DeviceInfo{}, fmt.Errorf("parsing devices from %s container: %w\n%s", d.Name, err, out)
- }
- testDevice, deviceInfo, err := netdevs.FindDeviceByIP(ip, devs)
- if err != nil {
- return "", netdevs.DeviceInfo{}, fmt.Errorf("can't find deviceInfo for container %s: %w", d.Name, err)
- }
- return testDevice, deviceInfo, nil
+ runner.TestWithDUT(context.Background(), t, runner.NewDockerDUT, runner.DutAddr)
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 21:14:54 +0000