Automated rollback of changelist 311285868

PiperOrigin-RevId: 311424257

12 files changed, 343 insertions, 496 deletions

diff --git a/test/packetimpact/netdevs/BUILD b/test/packetimpact/netdevs/BUILD
deleted file mode 100644
index 422bb9b0c..000000000
--- a/test/packetimpact/netdevs/BUILD
+++ /dev/null
@@ -1,15 +0,0 @@
-load("//tools:defs.bzl", "go_library")
-
-package(
-    licenses = ["notice"],
-)
-
-go_library(
-    name = "netdevs",
-    srcs = ["netdevs.go"],
-    visibility = ["//test/packetimpact:__subpackages__"],
-    deps = [
-        "//pkg/tcpip",
-        "//pkg/tcpip/header",
-    ],
-)
diff --git a/test/packetimpact/netdevs/netdevs.go b/test/packetimpact/netdevs/netdevs.go
deleted file mode 100644
index d2c9cfeaf..000000000
--- a/test/packetimpact/netdevs/netdevs.go
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright 2020 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 netdevs contains utilities for working with network devices.
-package netdevs
-
-import (
-	"fmt"
-	"net"
-	"regexp"
-	"strings"
-
-	"gvisor.dev/gvisor/pkg/tcpip"
-	"gvisor.dev/gvisor/pkg/tcpip/header"
-)
-
-// A DeviceInfo represents a network device.
-type DeviceInfo struct {
-	MAC      net.HardwareAddr
-	IPv4Addr net.IP
-	IPv4Net  *net.IPNet
-	IPv6Addr net.IP
-	IPv6Net  *net.IPNet
-}
-
-var (
-	deviceLine = regexp.MustCompile(`^\s*\d+: (\w+)`)
-	linkLine   = regexp.MustCompile(`^\s*link/\w+ ([0-9a-fA-F:]+)`)
-	inetLine   = regexp.MustCompile(`^\s*inet ([0-9./]+)`)
-	inet6Line  = regexp.MustCompile(`^\s*inet6 ([0-9a-fA-Z:/]+)`)
-)
-
-// ParseDevices parses the output from `ip addr show` into a map from device
-// name to information about the device.
-func ParseDevices(cmdOutput string) (map[string]DeviceInfo, error) {
-	var currentDevice string
-	var currentInfo DeviceInfo
-	deviceInfos := make(map[string]DeviceInfo)
-	for _, line := range strings.Split(cmdOutput, "\n") {
-		if m := deviceLine.FindStringSubmatch(line); m != nil {
-			if currentDevice != "" {
-				deviceInfos[currentDevice] = currentInfo
-			}
-			currentInfo = DeviceInfo{}
-			currentDevice = m[1]
-		} else if m := linkLine.FindStringSubmatch(line); m != nil {
-			mac, err := net.ParseMAC(m[1])
-			if err != nil {
-				return nil, err
-			}
-			currentInfo.MAC = mac
-		} else if m := inetLine.FindStringSubmatch(line); m != nil {
-			ipv4Addr, ipv4Net, err := net.ParseCIDR(m[1])
-			if err != nil {
-				return nil, err
-			}
-			currentInfo.IPv4Addr = ipv4Addr
-			currentInfo.IPv4Net = ipv4Net
-		} else if m := inet6Line.FindStringSubmatch(line); m != nil {
-			ipv6Addr, ipv6Net, err := net.ParseCIDR(m[1])
-			if err != nil {
-				return nil, err
-			}
-			currentInfo.IPv6Addr = ipv6Addr
-			currentInfo.IPv6Net = ipv6Net
-		}
-	}
-	if currentDevice != "" {
-		deviceInfos[currentDevice] = currentInfo
-	}
-	return deviceInfos, nil
-}
-
-// MACToIP converts the MAC address to an IPv6 link local address as described
-// in RFC 4291 page 20: https://tools.ietf.org/html/rfc4291#page-20
-func MACToIP(mac net.HardwareAddr) net.IP {
-	addr := make([]byte, header.IPv6AddressSize)
-	addr[0] = 0xfe
-	addr[1] = 0x80
-	header.EthernetAdddressToModifiedEUI64IntoBuf(tcpip.LinkAddress(mac), addr[8:])
-	return net.IP(addr)
-}
-
-// FindDeviceByIP finds a DeviceInfo and device name from an IP address in the
-// output of ParseDevices.
-func FindDeviceByIP(ip net.IP, devices map[string]DeviceInfo) (string, DeviceInfo, error) {
-	for dev, info := range devices {
-		if info.IPv4Addr.Equal(ip) {
-			return dev, info, nil
-		}
-	}
-	return "", DeviceInfo{}, fmt.Errorf("can't find %s on any interface", ip)
-}
diff --git a/test/packetimpact/runner/BUILD b/test/packetimpact/runner/BUILD
deleted file mode 100644
index 0b68a760a..000000000
--- a/test/packetimpact/runner/BUILD
+++ /dev/null
@@ -1,20 +0,0 @@
-load("//tools:defs.bzl", "go_test")
-
-package(
-    default_visibility = ["//test/packetimpact:__subpackages__"],
-    licenses = ["notice"],
-)
-
-go_test(
-    name = "packetimpact_test",
-    srcs = ["packetimpact_test.go"],
-    tags = [
-        # Not intended to be run directly.
-        "local",
-        "manual",
-    ],
-    deps = [
-        "//pkg/test/dockerutil",
-        "//test/packetimpact/netdevs",
-    ],
-)
diff --git a/test/packetimpact/runner/packetimpact_test.go b/test/packetimpact/runner/packetimpact_test.go
deleted file mode 100644
index 8996f23fa..000000000
--- a/test/packetimpact/runner/packetimpact_test.go
+++ /dev/null
@@ -1,315 +0,0 @@
-// Copyright 2020 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.
-
-// The runner starts docker containers and networking for a packetimpact test.
-package packetimpact_test
-
-import (
-	"flag"
-	"fmt"
-	"log"
-	"math/rand"
-	"net"
-	"os"
-	"os/exec"
-	"path"
-	"strings"
-	"testing"
-	"time"
-
-	"gvisor.dev/gvisor/pkg/test/dockerutil"
-	"gvisor.dev/gvisor/test/packetimpact/netdevs"
-)
-
-// 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 (
-	dutPlatform     = flag.String("dut_platform", "", "either \"linux\" or \"netstack\"")
-	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 TestOne(t *testing.T) {
-	flag.Var(&extraTestArgs, "extra_test_arg", "extra arguments to pass to the testbench")
-	flag.Parse()
-	if *dutPlatform != "linux" && *dutPlatform != "netstack" {
-		t.Fatal("--dut_platform should be either linux or netstack")
-	}
-	if *testbenchBinary == "" {
-		t.Fatal("--testbench_binary is missing")
-	}
-	if *dutPlatform == "netstack" {
-		if _, err := dockerutil.RuntimePath(); err != nil {
-			t.Fatal("--runtime is missing or invalid with --dut_platform=netstack:", err)
-		}
-	}
-	dockerutil.EnsureSupportedDockerVersion()
-
-	// 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.NewDockerNetwork(logger("ctrlNet"))
-	testNet := dockerutil.NewDockerNetwork(logger("testNet"))
-	for _, dn := range []*dockerutil.DockerNetwork{ctrlNet, testNet} {
-		for {
-			if err := createDockerNetwork(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.DockerNetwork) {
-			if err := dn.Cleanup(); err != nil {
-				t.Errorf("unable to cleanup container %s: %s", dn.Name, err)
-			}
-		}(dn)
-	}
-
-	runOpts := dockerutil.RunOpts{
-		Image:      "packetimpact",
-		CapAdd:     []string{"NET_ADMIN"},
-		Extra:      []string{"--sysctl", "net.ipv6.conf.all.disable_ipv6=0", "--rm"},
-		Foreground: true,
-		Pty:        func(_ *exec.Cmd, _ *os.File) {},
-	}
-
-	// Create the Docker container for the DUT.
-	dut := dockerutil.MakeDocker(logger("dut"))
-	if *dutPlatform == "linux" {
-		dut.Runtime = ""
-	}
-
-	const containerPosixServerBinary = "/packetimpact/posix_server"
-	dut.CopyFiles("/packetimpact", "/test/packetimpact/dut/posix_server")
-
-	if err := dut.Create(runOpts, containerPosixServerBinary, "--ip=0.0.0.0", "--port="+ctrlPort); err != nil {
-		t.Fatalf("unable to create container %s: %s", dut.Name, err)
-	}
-	defer dut.CleanUp()
-
-	// Add ctrlNet as eth1 and testNet as eth2.
-	const testNetDev = "eth2"
-	if err := addNetworks(dut, dutAddr, []*dockerutil.DockerNetwork{ctrlNet, testNet}); err != nil {
-		t.Fatal(err)
-	}
-
-	if err := dut.Start(); err != nil {
-		t.Fatalf("unable to start container %s: %s", dut.Name, err)
-	}
-
-	if _, err := dut.WaitForOutput("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(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(dockerutil.RunOpts{}, "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(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.MakeDocker(logger("testbench"))
-	testbench.Runtime = "" // The testbench always runs on Linux.
-
-	tbb := path.Base(*testbenchBinary)
-	containerTestbenchBinary := "/packetimpact/" + tbb
-	testbench.CopyFiles("/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,
-	}
-	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"
-	}
-
-	if err := testbench.Create(runOpts, snifferArgs...); err != nil {
-		t.Fatalf("unable to create container %s: %s", testbench.Name, err)
-	}
-	defer testbench.CleanUp()
-
-	// Add ctrlNet as eth1 and testNet as eth2.
-	if err := addNetworks(testbench, testbenchAddr, []*dockerutil.DockerNetwork{ctrlNet, testNet}); err != nil {
-		t.Fatal(err)
-	}
-
-	if err := testbench.Start(); err != nil {
-		t.Fatalf("unable to start container %s: %s", testbench.Name, err)
-	}
-
-	// Kill so that it will flush output.
-	defer testbench.Exec(dockerutil.RunOpts{}, "killall", snifferArgs[0])
-
-	if _, err := testbench.WaitForOutput(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 a 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.
-	if _, err := testbench.Exec(dockerutil.RunOpts{}, "iptables", "-A", "INPUT", "-i", testNetDev, "-j", "DROP"); err != nil {
-		t.Fatalf("unable to Exec iptables on container %s: %s", testbench.Name, err)
-	}
-
-	// 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(),
-		"--device", testNetDev,
-	)
-	_, err = testbench.Exec(dockerutil.RunOpts{}, testArgs...)
-	if !*expectFailure && err != nil {
-		t.Fatal("test failed:", err)
-	}
-	if *expectFailure && err == nil {
-		t.Fatal("test failure expected but the test succeeded, enable the test and mark the corresponding bug as fixed")
-	}
-}
-
-func addNetworks(d *dockerutil.Docker, addr net.IP, networks []*dockerutil.DockerNetwork) error {
-	for _, dn := range networks {
-		ip := addressInSubnet(addr, *dn.Subnet)
-		// Connect to the network with the specified IP address.
-		if err := dn.Connect(d, "--ip", 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)
-}
-
-// makeDockerNetwork makes a randomly-named network that will start with the
-// namePrefix. The network will be a random /24 subnet.
-func createDockerNetwork(n *dockerutil.DockerNetwork) 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()
-}
-
-// deviceByIP finds a deviceInfo and device name from an IP address.
-func deviceByIP(d *dockerutil.Docker, ip net.IP) (string, netdevs.DeviceInfo, error) {
-	out, err := d.Exec(dockerutil.RunOpts{}, "ip", "addr", "show")
-	if err != nil {
-		return "", netdevs.DeviceInfo{}, fmt.Errorf("listing devices on %s container: %w", d.Name, err)
-	}
-	devs, err := netdevs.ParseDevices(out)
-	if err != nil {
-		return "", netdevs.DeviceInfo{}, fmt.Errorf("parsing devices from %s container: %w", d.Name, err)
-	}
-	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
-}
diff --git a/test/packetimpact/testbench/BUILD b/test/packetimpact/testbench/BUILD
index d588d3289..fed51006f 100644
--- a/test/packetimpact/testbench/BUILD
+++ b/test/packetimpact/testbench/BUILD
@@ -21,7 +21,6 @@ go_library(
         "//pkg/tcpip/header",
         "//pkg/tcpip/seqnum",
         "//pkg/usermem",
-        "//test/packetimpact/netdevs",
         "//test/packetimpact/proto:posix_server_go_proto",
         "@com_github_google_go-cmp//cmp:go_default_library",
         "@com_github_google_go-cmp//cmp/cmpopts:go_default_library",
diff --git a/test/packetimpact/testbench/connections.go b/test/packetimpact/testbench/connections.go
index bf104e5ca..463fd0556 100644
--- a/test/packetimpact/testbench/connections.go
+++ b/test/packetimpact/testbench/connections.go
@@ -114,12 +114,12 @@ var _ layerState = (*etherState)(nil)
 func newEtherState(out, in Ether) (*etherState, error) {
 	lMAC, err := tcpip.ParseMACAddress(LocalMAC)
 	if err != nil {
-		return nil, fmt.Errorf("parsing local MAC: %q: %w", LocalMAC, err)
+		return nil, err
 	}
 
 	rMAC, err := tcpip.ParseMACAddress(RemoteMAC)
 	if err != nil {
-		return nil, fmt.Errorf("parsing remote MAC: %q: %w", RemoteMAC, err)
+		return nil, err
 	}
 	s := etherState{
 		out: Ether{SrcAddr: &lMAC, DstAddr: &rMAC},
diff --git a/test/packetimpact/testbench/dut.go b/test/packetimpact/testbench/dut.go
index b919a3c2e..a78b7d7ee 100644
--- a/test/packetimpact/testbench/dut.go
+++ b/test/packetimpact/testbench/dut.go
@@ -16,7 +16,6 @@ package testbench
 
 import (
 	"context"
-	"flag"
 	"net"
 	"strconv"
 	"syscall"
@@ -38,11 +37,6 @@ type DUT struct {
 
 // NewDUT creates a new connection with the DUT over gRPC.
 func NewDUT(t *testing.T) DUT {
-	flag.Parse()
-	if err := genPseudoFlags(); err != nil {
-		t.Fatal("generating psuedo flags:", err)
-	}
-
 	posixServerAddress := POSIXServerIP + ":" + strconv.Itoa(POSIXServerPort)
 	conn, err := grpc.Dial(posixServerAddress, grpc.WithInsecure(), grpc.WithKeepaliveParams(keepalive.ClientParameters{Timeout: RPCKeepalive}))
 	if err != nil {
diff --git a/test/packetimpact/testbench/rawsockets.go b/test/packetimpact/testbench/rawsockets.go
index 278229b7e..4665f60b2 100644
--- a/test/packetimpact/testbench/rawsockets.go
+++ b/test/packetimpact/testbench/rawsockets.go
@@ -16,6 +16,7 @@ package testbench
 
 import (
 	"encoding/binary"
+	"flag"
 	"fmt"
 	"math"
 	"net"
@@ -40,6 +41,7 @@ func htons(x uint16) uint16 {
 
 // NewSniffer creates a Sniffer connected to *device.
 func NewSniffer(t *testing.T) (Sniffer, error) {
+	flag.Parse()
 	snifferFd, err := unix.Socket(unix.AF_PACKET, unix.SOCK_RAW, int(htons(unix.ETH_P_ALL)))
 	if err != nil {
 		return Sniffer{}, err
@@ -134,6 +136,7 @@ type Injector struct {
 
 // NewInjector creates a new injector on *device.
 func NewInjector(t *testing.T) (Injector, error) {
+	flag.Parse()
 	ifInfo, err := net.InterfaceByName(Device)
 	if err != nil {
 		return Injector{}, err
diff --git a/test/packetimpact/testbench/testbench.go b/test/packetimpact/testbench/testbench.go
index 4de2aa1d3..a1242b189 100644
--- a/test/packetimpact/testbench/testbench.go
+++ b/test/packetimpact/testbench/testbench.go
@@ -16,12 +16,7 @@ package testbench
 
 import (
 	"flag"
-	"fmt"
-	"net"
-	"os/exec"
 	"time"
-
-	"gvisor.dev/gvisor/test/packetimpact/netdevs"
 )
 
 var (
@@ -60,31 +55,9 @@ func RegisterFlags(fs *flag.FlagSet) {
 	fs.DurationVar(&RPCKeepalive, "rpc_keepalive", RPCKeepalive, "gRPC keepalive")
 	fs.StringVar(&LocalIPv4, "local_ipv4", LocalIPv4, "local IPv4 address for test packets")
 	fs.StringVar(&RemoteIPv4, "remote_ipv4", RemoteIPv4, "remote IPv4 address for test packets")
+	fs.StringVar(&LocalIPv6, "local_ipv6", LocalIPv6, "local IPv6 address for test packets")
 	fs.StringVar(&RemoteIPv6, "remote_ipv6", RemoteIPv6, "remote IPv6 address for test packets")
+	fs.StringVar(&LocalMAC, "local_mac", LocalMAC, "local mac address for test packets")
 	fs.StringVar(&RemoteMAC, "remote_mac", RemoteMAC, "remote mac address for test packets")
 	fs.StringVar(&Device, "device", Device, "local device for test packets")
 }
-
-// genPseudoFlags populates flag-like global config based on real flags.
-//
-// genPseudoFlags must only be called after flag.Parse.
-func genPseudoFlags() error {
-	out, err := exec.Command("ip", "addr", "show").CombinedOutput()
-	if err != nil {
-		return fmt.Errorf("listing devices: %q: %w", string(out), err)
-	}
-	devs, err := netdevs.ParseDevices(string(out))
-	if err != nil {
-		return fmt.Errorf("parsing devices: %w", err)
-	}
-
-	_, deviceInfo, err := netdevs.FindDeviceByIP(net.ParseIP(LocalIPv4), devs)
-	if err != nil {
-		return fmt.Errorf("can't find deviceInfo: %w", err)
-	}
-
-	LocalMAC = deviceInfo.MAC.String()
-	LocalIPv6 = deviceInfo.IPv6Addr.String()
-
-	return nil
-}
diff --git a/test/packetimpact/tests/BUILD b/test/packetimpact/tests/BUILD
index 15e1c3f04..c25b3b8c1 100644
--- a/test/packetimpact/tests/BUILD
+++ b/test/packetimpact/tests/BUILD
@@ -1,4 +1,4 @@
-load("//test/packetimpact/runner:defs.bzl", "packetimpact_go_test")
+load("defs.bzl", "packetimpact_go_test")
 
 package(
     default_visibility = ["//test/packetimpact:__subpackages__"],
@@ -156,3 +156,8 @@ packetimpact_go_test(
         "@org_golang_x_sys//unix:go_default_library",
     ],
 )
+
+sh_binary(
+    name = "test_runner",
+    srcs = ["test_runner.sh"],
+)
diff --git a/test/packetimpact/runner/defs.bzl b/test/packetimpact/tests/defs.bzl
index ee2e7e974..27c5de375 100644
--- a/test/packetimpact/runner/defs.bzl
+++ b/test/packetimpact/tests/defs.bzl
@@ -11,10 +11,12 @@ def _packetimpact_test_impl(ctx):
         # permission problems, because all runfiles may not be owned by the
         # current user, and no other users will be mapped in that namespace.
         # Make sure that everything is readable here.
-        "find . -type f -or -type d -exec chmod a+rx {} \\;",
-        "%s %s --testbench_binary %s $@\n" % (
+        "find . -type f -exec chmod a+rx {} \\;",
+        "find . -type d -exec chmod a+rx {} \\;",
+        "%s %s --posix_server_binary %s --testbench_binary %s $@\n" % (
             test_runner.short_path,
             " ".join(ctx.attr.flags),
+            ctx.files._posix_server_binary[0].short_path,
             ctx.files.testbench_binary[0].short_path,
         ),
     ])
@@ -36,7 +38,7 @@ _packetimpact_test = rule(
         "_test_runner": attr.label(
             executable = True,
             cfg = "target",
-            default = ":packetimpact_test",
+            default = ":test_runner",
         ),
         "_posix_server_binary": attr.label(
             cfg = "target",
diff --git a/test/packetimpact/tests/test_runner.sh b/test/packetimpact/tests/test_runner.sh
new file mode 100755
index 000000000..706441cce
--- /dev/null
+++ b/test/packetimpact/tests/test_runner.sh
@@ -0,0 +1,325 @@
+#!/bin/bash
+
+# Copyright 2020 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.
+
+# Run a packetimpact test.  Two docker containers are made, one for the
+# Device-Under-Test (DUT) and one for the test bench.  Each is attached with
+# two networks, one for control packets that aid the test and one for test
+# packets which are sent as part of the test and observed for correctness.
+
+set -euxo pipefail
+
+function failure() {
+  local lineno=$1
+  local msg=$2
+  local filename="$0"
+  echo "FAIL: $filename:$lineno: $msg"
+}
+trap 'failure ${LINENO} "$BASH_COMMAND"' ERR
+
+declare -r LONGOPTS="dut_platform:,posix_server_binary:,testbench_binary:,runtime:,tshark,extra_test_arg:,expect_failure"
+
+# Don't use declare below so that the error from getopt will end the script.
+PARSED=$(getopt --options "" --longoptions=$LONGOPTS --name "$0" -- "$@")
+
+eval set -- "$PARSED"
+
+declare -a EXTRA_TEST_ARGS
+
+while true; do
+  case "$1" in
+    --dut_platform)
+      # Either "linux" or "netstack".
+      declare -r DUT_PLATFORM="$2"
+      shift 2
+      ;;
+    --posix_server_binary)
+      declare -r POSIX_SERVER_BINARY="$2"
+      shift 2
+      ;;
+    --testbench_binary)
+      declare -r TESTBENCH_BINARY="$2"
+      shift 2
+      ;;
+    --runtime)
+      # Not readonly because there might be multiple --runtime arguments and we
+      # want to use just the last one.  Only used if --dut_platform is
+      # "netstack".
+      declare RUNTIME="$2"
+      shift 2
+      ;;
+    --tshark)
+      declare -r TSHARK="1"
+      shift 1
+      ;;
+    --extra_test_arg)
+      EXTRA_TEST_ARGS+="$2"
+      shift 2
+      ;;
+    --expect_failure)
+      declare -r EXPECT_FAILURE="1"
+      shift 1
+      ;;
+    --)
+      shift
+      break
+      ;;
+    *)
+      echo "Programming error"
+      exit 3
+  esac
+done
+
+# All the other arguments are scripts.
+declare -r scripts="$@"
+
+# Check that the required flags are defined in a way that is safe for "set -u".
+if [[ "${DUT_PLATFORM-}" == "netstack" ]]; then
+  if [[ -z "${RUNTIME-}" ]]; then
+    echo "FAIL: Missing --runtime argument: ${RUNTIME-}"
+    exit 2
+  fi
+  declare -r RUNTIME_ARG="--runtime ${RUNTIME}"
+elif [[ "${DUT_PLATFORM-}" == "linux" ]]; then
+  declare -r RUNTIME_ARG=""
+else
+  echo "FAIL: Bad or missing --dut_platform argument: ${DUT_PLATFORM-}"
+  exit 2
+fi
+if [[ ! -f "${POSIX_SERVER_BINARY-}" ]]; then
+  echo "FAIL: Bad or missing --posix_server_binary: ${POSIX_SERVER-}"
+  exit 2
+fi
+if [[ ! -f "${TESTBENCH_BINARY-}" ]]; then
+  echo "FAIL: Bad or missing --testbench_binary: ${TESTBENCH_BINARY-}"
+  exit 2
+fi
+
+function new_net_prefix() {
+  # Class C, 192.0.0.0 to 223.255.255.255, transitionally has mask 24.
+  echo "$(shuf -i 192-223 -n 1).$(shuf -i 0-255 -n 1).$(shuf -i 0-255 -n 1)"
+}
+
+# Variables specific to the control network and interface start with CTRL_.
+# Variables specific to the test network and interface start with TEST_.
+# Variables specific to the DUT start with DUT_.
+# Variables specific to the test bench start with TESTBENCH_.
+# Use random numbers so that test networks don't collide.
+declare CTRL_NET="ctrl_net-${RANDOM}${RANDOM}"
+declare CTRL_NET_PREFIX=$(new_net_prefix)
+declare TEST_NET="test_net-${RANDOM}${RANDOM}"
+declare TEST_NET_PREFIX=$(new_net_prefix)
+# On both DUT and test bench, testing packets are on the eth2 interface.
+declare -r TEST_DEVICE="eth2"
+# Number of bits in the *_NET_PREFIX variables.
+declare -r NET_MASK="24"
+# Last bits of the DUT's IP address.
+declare -r DUT_NET_SUFFIX=".10"
+# Control port.
+declare -r CTRL_PORT="40000"
+# Last bits of the test bench's IP address.
+declare -r TESTBENCH_NET_SUFFIX=".20"
+declare -r TIMEOUT="60"
+declare -r IMAGE_TAG="gcr.io/gvisor-presubmit/packetimpact"
+
+# Make sure that docker is installed.
+docker --version
+
+function finish {
+  local cleanup_success=1
+
+  if [[ -z "${TSHARK-}" ]]; then
+    # Kill tcpdump so that it will flush output.
+    docker exec -t "${TESTBENCH}" \
+      killall tcpdump || \
+      cleanup_success=0
+  else
+    # Kill tshark so that it will flush output.
+    docker exec -t "${TESTBENCH}" \
+      killall tshark || \
+      cleanup_success=0
+  fi
+
+  for net in "${CTRL_NET}" "${TEST_NET}"; do
+    # Kill all processes attached to ${net}.
+    for docker_command in "kill" "rm"; do
+      (docker network inspect "${net}" \
+        --format '{{range $key, $value := .Containers}}{{$key}} {{end}}' \
+        | xargs -r docker "${docker_command}") || \
+        cleanup_success=0
+    done
+    # Remove the network.
+    docker network rm "${net}" || \
+      cleanup_success=0
+  done
+
+  if ((!$cleanup_success)); then
+    echo "FAIL: Cleanup command failed"
+    exit 4
+  fi
+}
+trap finish EXIT
+
+# Subnet for control packets between test bench and DUT.
+while ! docker network create \
+  "--subnet=${CTRL_NET_PREFIX}.0/${NET_MASK}" "${CTRL_NET}"; do
+  sleep 0.1
+  CTRL_NET_PREFIX=$(new_net_prefix)
+  CTRL_NET="ctrl_net-${RANDOM}${RANDOM}"
+done
+
+# Subnet for the packets that are part of the test.
+while ! docker network create \
+  "--subnet=${TEST_NET_PREFIX}.0/${NET_MASK}" "${TEST_NET}"; do
+  sleep 0.1
+  TEST_NET_PREFIX=$(new_net_prefix)
+  TEST_NET="test_net-${RANDOM}${RANDOM}"
+done
+
+docker pull "${IMAGE_TAG}"
+
+# Create the DUT container and connect to network.
+DUT=$(docker create ${RUNTIME_ARG} --privileged --rm \
+  --cap-add NET_ADMIN \
+  --sysctl net.ipv6.conf.all.disable_ipv6=0 \
+  --stop-timeout ${TIMEOUT} -it ${IMAGE_TAG})
+docker network connect "${CTRL_NET}" \
+  --ip "${CTRL_NET_PREFIX}${DUT_NET_SUFFIX}" "${DUT}" \
+  || (docker kill ${DUT}; docker rm ${DUT}; false)
+docker network connect "${TEST_NET}" \
+  --ip "${TEST_NET_PREFIX}${DUT_NET_SUFFIX}" "${DUT}" \
+  || (docker kill ${DUT}; docker rm ${DUT}; false)
+docker start "${DUT}"
+
+# Create the test bench container and connect to network.
+TESTBENCH=$(docker create --privileged --rm \
+  --cap-add NET_ADMIN \
+  --sysctl net.ipv6.conf.all.disable_ipv6=0 \
+  --stop-timeout ${TIMEOUT} -it ${IMAGE_TAG})
+docker network connect "${CTRL_NET}" \
+  --ip "${CTRL_NET_PREFIX}${TESTBENCH_NET_SUFFIX}" "${TESTBENCH}" \
+  || (docker kill ${TESTBENCH}; docker rm ${TESTBENCH}; false)
+docker network connect "${TEST_NET}" \
+  --ip "${TEST_NET_PREFIX}${TESTBENCH_NET_SUFFIX}" "${TESTBENCH}" \
+  || (docker kill ${TESTBENCH}; docker rm ${TESTBENCH}; false)
+docker start "${TESTBENCH}"
+
+# Start the posix_server in the DUT.
+declare -r DOCKER_POSIX_SERVER_BINARY="/$(basename ${POSIX_SERVER_BINARY})"
+docker cp -L ${POSIX_SERVER_BINARY} "${DUT}:${DOCKER_POSIX_SERVER_BINARY}"
+
+docker exec -t "${DUT}" \
+  /bin/bash -c "${DOCKER_POSIX_SERVER_BINARY} \
+  --ip ${CTRL_NET_PREFIX}${DUT_NET_SUFFIX} \
+  --port ${CTRL_PORT}" &
+
+# Because the Linux kernel receives the SYN-ACK but didn't send the SYN it will
+# issue a RST. To prevent this IPtables can be used to filter those out.
+docker exec "${TESTBENCH}" \
+  iptables -A INPUT -i ${TEST_DEVICE} -j DROP
+
+# Wait for the DUT server to come up.  Attempt to connect to it from the test
+# bench every 100 milliseconds until success.
+while ! docker exec "${TESTBENCH}" \
+  nc -zv "${CTRL_NET_PREFIX}${DUT_NET_SUFFIX}" "${CTRL_PORT}"; do
+  sleep 0.1
+done
+
+declare -r REMOTE_MAC=$(docker exec -t "${DUT}" ip link show \
+  "${TEST_DEVICE}" | tail -1 | cut -d' ' -f6)
+declare -r LOCAL_MAC=$(docker exec -t "${TESTBENCH}" ip link show \
+  "${TEST_DEVICE}" | tail -1 | cut -d' ' -f6)
+declare REMOTE_IPV6=$(docker exec -t "${DUT}" ip addr show scope link \
+  "${TEST_DEVICE}" | grep inet6 | cut -d' ' -f6 | cut -d'/' -f1)
+declare -r LOCAL_IPV6=$(docker exec -t "${TESTBENCH}" ip addr show scope link \
+  "${TEST_DEVICE}" | grep inet6 | cut -d' ' -f6 | cut -d'/' -f1)
+
+# Netstack as DUT doesn't assign IPv6 addresses automatically so do it if
+# needed.  Convert the MAC address to an IPv6 link local address as described in
+# RFC 4291 page 20: https://tools.ietf.org/html/rfc4291#page-20
+if [[ -z "${REMOTE_IPV6}" ]]; then
+  # Split the octets of the MAC into an array of strings.
+  IFS=":" read -a REMOTE_OCTETS <<< "${REMOTE_MAC}"
+  # Flip the global bit.
+  REMOTE_OCTETS[0]=$(printf '%x' "$((0x${REMOTE_OCTETS[0]} ^ 2))")
+  # Add the IPv6 address.
+  docker exec "${DUT}" \
+    ip addr add $(printf 'fe80::%02x%02x:%02xff:fe%02x:%02x%02x/64' \
+    "0x${REMOTE_OCTETS[0]}" "0x${REMOTE_OCTETS[1]}" "0x${REMOTE_OCTETS[2]}" \
+    "0x${REMOTE_OCTETS[3]}" "0x${REMOTE_OCTETS[4]}" "0x${REMOTE_OCTETS[5]}") \
+    scope link \
+    dev "${TEST_DEVICE}"
+  # Re-extract the IPv6 address.
+  # TODO(eyalsoha): Add "scope link" below when netstack supports correctly
+  # creating link-local IPv6 addresses.
+  REMOTE_IPV6=$(docker exec -t "${DUT}" ip addr show \
+    "${TEST_DEVICE}" | grep inet6 | cut -d' ' -f6 | cut -d'/' -f1)
+fi
+
+declare -r DOCKER_TESTBENCH_BINARY="/$(basename ${TESTBENCH_BINARY})"
+docker cp -L "${TESTBENCH_BINARY}" "${TESTBENCH}:${DOCKER_TESTBENCH_BINARY}"
+
+if [[ -z "${TSHARK-}" ]]; then
+  # Run tcpdump in the test bench unbuffered, without dns resolution, just on
+  # the interface with the test packets.
+  docker exec -t "${TESTBENCH}" \
+    tcpdump -S -vvv -U -n -i "${TEST_DEVICE}" \
+    net "${TEST_NET_PREFIX}/24" or \
+    host "${REMOTE_IPV6}" or \
+    host "${LOCAL_IPV6}" &
+else
+  # Run tshark in the test bench unbuffered, without dns resolution, just on the
+  # interface with the test packets.
+  docker exec -t "${TESTBENCH}" \
+    tshark -V -l -n -i "${TEST_DEVICE}" \
+    -o tcp.check_checksum:TRUE \
+    -o udp.check_checksum:TRUE \
+    net "${TEST_NET_PREFIX}/24" or \
+    host "${REMOTE_IPV6}" or \
+    host "${LOCAL_IPV6}" &
+fi
+
+# tcpdump and tshark take time to startup
+sleep 3
+
+# Start a packetimpact test on the test bench.  The packetimpact test sends and
+# receives packets and also sends POSIX socket commands to the posix_server to
+# be executed on the DUT.
+docker exec \
+  -e XML_OUTPUT_FILE="/test.xml" \
+  -e TEST_TARGET \
+  -t "${TESTBENCH}" \
+  /bin/bash -c "${DOCKER_TESTBENCH_BINARY} \
+  ${EXTRA_TEST_ARGS[@]-} \
+  --posix_server_ip=${CTRL_NET_PREFIX}${DUT_NET_SUFFIX} \
+  --posix_server_port=${CTRL_PORT} \
+  --remote_ipv4=${TEST_NET_PREFIX}${DUT_NET_SUFFIX} \
+  --local_ipv4=${TEST_NET_PREFIX}${TESTBENCH_NET_SUFFIX} \
+  --remote_ipv6=${REMOTE_IPV6} \
+  --local_ipv6=${LOCAL_IPV6} \
+  --remote_mac=${REMOTE_MAC} \
+  --local_mac=${LOCAL_MAC} \
+  --device=${TEST_DEVICE}" && true
+declare -r TEST_RESULT="${?}"
+if [[ -z "${EXPECT_FAILURE-}" && "${TEST_RESULT}" != 0 ]]; then
+  echo 'FAIL: This test was expected to pass.'
+  exit ${TEST_RESULT}
+fi
+if [[ ! -z "${EXPECT_FAILURE-}" && "${TEST_RESULT}" == 0 ]]; then
+  echo 'FAIL: This test was expected to fail but passed.  Enable the test and' \
+    'mark the corresponding bug as fixed.'
+  exit 1
+fi
+echo PASS: No errors.