Automated rollback of changelist 336185457

PiperOrigin-RevId: 336304024

3 files changed, 0 insertions, 601 deletions

diff --git a/pkg/tcpip/tests/integration/BUILD b/pkg/tcpip/tests/integration/BUILD
index a4f141253..06c7a3cd3 100644
--- a/pkg/tcpip/tests/integration/BUILD
+++ b/pkg/tcpip/tests/integration/BUILD
@@ -6,8 +6,6 @@ go_test(
     name = "integration_test",
     size = "small",
     srcs = [
-        "forward_test.go",
-        "link_resolution_test.go",
         "loopback_test.go",
         "multicast_broadcast_test.go",
     ],
@@ -17,8 +15,6 @@ go_test(
         "//pkg/tcpip/header",
         "//pkg/tcpip/link/channel",
         "//pkg/tcpip/link/loopback",
-        "//pkg/tcpip/link/pipe",
-        "//pkg/tcpip/network/arp",
         "//pkg/tcpip/network/ipv4",
         "//pkg/tcpip/network/ipv6",
         "//pkg/tcpip/stack",
diff --git a/pkg/tcpip/tests/integration/forward_test.go b/pkg/tcpip/tests/integration/forward_test.go
deleted file mode 100644
index ffd38ee1a..000000000
--- a/pkg/tcpip/tests/integration/forward_test.go
+++ /dev/null
@@ -1,378 +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 integration_test
-
-import (
-	"net"
-	"testing"
-
-	"github.com/google/go-cmp/cmp"
-	"gvisor.dev/gvisor/pkg/tcpip"
-	"gvisor.dev/gvisor/pkg/tcpip/buffer"
-	"gvisor.dev/gvisor/pkg/tcpip/link/pipe"
-	"gvisor.dev/gvisor/pkg/tcpip/network/arp"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
-	"gvisor.dev/gvisor/pkg/tcpip/stack"
-	"gvisor.dev/gvisor/pkg/tcpip/transport/udp"
-	"gvisor.dev/gvisor/pkg/waiter"
-)
-
-func TestForwarding(t *testing.T) {
-	const (
-		host1NICLinkAddr   = tcpip.LinkAddress("\x02\x03\x03\x04\x05\x06")
-		routerNIC1LinkAddr = tcpip.LinkAddress("\x02\x03\x03\x04\x05\x07")
-		routerNIC2LinkAddr = tcpip.LinkAddress("\x02\x03\x03\x04\x05\x08")
-		host2NICLinkAddr   = tcpip.LinkAddress("\x02\x03\x03\x04\x05\x09")
-
-		host1NICID   = 1
-		routerNICID1 = 2
-		routerNICID2 = 3
-		host2NICID   = 4
-
-		listenPort = 8080
-	)
-
-	host1IPv4Addr := tcpip.ProtocolAddress{
-		Protocol: ipv4.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("192.168.0.2").To4()),
-			PrefixLen: 24,
-		},
-	}
-	routerNIC1IPv4Addr := tcpip.ProtocolAddress{
-		Protocol: ipv4.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("192.168.0.1").To4()),
-			PrefixLen: 24,
-		},
-	}
-	routerNIC2IPv4Addr := tcpip.ProtocolAddress{
-		Protocol: ipv4.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("10.0.0.1").To4()),
-			PrefixLen: 8,
-		},
-	}
-	host2IPv4Addr := tcpip.ProtocolAddress{
-		Protocol: ipv4.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("10.0.0.2").To4()),
-			PrefixLen: 8,
-		},
-	}
-	host1IPv6Addr := tcpip.ProtocolAddress{
-		Protocol: ipv6.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("a::2").To16()),
-			PrefixLen: 64,
-		},
-	}
-	routerNIC1IPv6Addr := tcpip.ProtocolAddress{
-		Protocol: ipv6.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("a::1").To16()),
-			PrefixLen: 64,
-		},
-	}
-	routerNIC2IPv6Addr := tcpip.ProtocolAddress{
-		Protocol: ipv6.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("b::1").To16()),
-			PrefixLen: 64,
-		},
-	}
-	host2IPv6Addr := tcpip.ProtocolAddress{
-		Protocol: ipv6.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("b::2").To16()),
-			PrefixLen: 64,
-		},
-	}
-
-	type endpointAndAddresses struct {
-		serverEP         tcpip.Endpoint
-		serverAddr       tcpip.Address
-		serverReadableCH chan struct{}
-
-		clientEP         tcpip.Endpoint
-		clientAddr       tcpip.Address
-		clientReadableCH chan struct{}
-	}
-
-	newEP := func(t *testing.T, s *stack.Stack, transProto tcpip.TransportProtocolNumber, netProto tcpip.NetworkProtocolNumber) (tcpip.Endpoint, chan struct{}) {
-		t.Helper()
-		var wq waiter.Queue
-		we, ch := waiter.NewChannelEntry(nil)
-		wq.EventRegister(&we, waiter.EventIn)
-		ep, err := s.NewEndpoint(transProto, netProto, &wq)
-		if err != nil {
-			t.Fatalf("s.NewEndpoint(%d, %d, _): %s", transProto, netProto, err)
-		}
-
-		t.Cleanup(func() {
-			wq.EventUnregister(&we)
-		})
-
-		return ep, ch
-	}
-
-	tests := []struct {
-		name       string
-		epAndAddrs func(t *testing.T, host1Stack, routerStack, host2Stack *stack.Stack) endpointAndAddresses
-	}{
-		{
-			name: "IPv4 host1 server with host2 client",
-			epAndAddrs: func(t *testing.T, host1Stack, routerStack, host2Stack *stack.Stack) endpointAndAddresses {
-				ep1, ep1WECH := newEP(t, host1Stack, udp.ProtocolNumber, ipv4.ProtocolNumber)
-				ep2, ep2WECH := newEP(t, host2Stack, udp.ProtocolNumber, ipv4.ProtocolNumber)
-				return endpointAndAddresses{
-					serverEP:         ep1,
-					serverAddr:       host1IPv4Addr.AddressWithPrefix.Address,
-					serverReadableCH: ep1WECH,
-
-					clientEP:         ep2,
-					clientAddr:       host2IPv4Addr.AddressWithPrefix.Address,
-					clientReadableCH: ep2WECH,
-				}
-			},
-		},
-		{
-			name: "IPv6 host2 server with host1 client",
-			epAndAddrs: func(t *testing.T, host1Stack, routerStack, host2Stack *stack.Stack) endpointAndAddresses {
-				ep1, ep1WECH := newEP(t, host2Stack, udp.ProtocolNumber, ipv6.ProtocolNumber)
-				ep2, ep2WECH := newEP(t, host1Stack, udp.ProtocolNumber, ipv6.ProtocolNumber)
-				return endpointAndAddresses{
-					serverEP:         ep1,
-					serverAddr:       host2IPv6Addr.AddressWithPrefix.Address,
-					serverReadableCH: ep1WECH,
-
-					clientEP:         ep2,
-					clientAddr:       host1IPv6Addr.AddressWithPrefix.Address,
-					clientReadableCH: ep2WECH,
-				}
-			},
-		},
-	}
-
-	for _, test := range tests {
-		t.Run(test.name, func(t *testing.T) {
-			stackOpts := stack.Options{
-				NetworkProtocols:   []stack.NetworkProtocolFactory{arp.NewProtocol, ipv4.NewProtocol, ipv6.NewProtocol},
-				TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol},
-			}
-
-			host1Stack := stack.New(stackOpts)
-			routerStack := stack.New(stackOpts)
-			host2Stack := stack.New(stackOpts)
-
-			host1NIC, routerNIC1 := pipe.New(host1NICLinkAddr, routerNIC1LinkAddr, stack.CapabilityResolutionRequired)
-			routerNIC2, host2NIC := pipe.New(routerNIC2LinkAddr, host2NICLinkAddr, stack.CapabilityResolutionRequired)
-
-			if err := host1Stack.CreateNIC(host1NICID, host1NIC); err != nil {
-				t.Fatalf("host1Stack.CreateNIC(%d, _): %s", host1NICID, err)
-			}
-			if err := routerStack.CreateNIC(routerNICID1, routerNIC1); err != nil {
-				t.Fatalf("routerStack.CreateNIC(%d, _): %s", routerNICID1, err)
-			}
-			if err := routerStack.CreateNIC(routerNICID2, routerNIC2); err != nil {
-				t.Fatalf("routerStack.CreateNIC(%d, _): %s", routerNICID2, err)
-			}
-			if err := host2Stack.CreateNIC(host2NICID, host2NIC); err != nil {
-				t.Fatalf("host2Stack.CreateNIC(%d, _): %s", host2NICID, err)
-			}
-
-			if err := routerStack.SetForwarding(ipv4.ProtocolNumber, true); err != nil {
-				t.Fatalf("routerStack.SetForwarding(%d): %s", ipv4.ProtocolNumber, err)
-			}
-			if err := routerStack.SetForwarding(ipv6.ProtocolNumber, true); err != nil {
-				t.Fatalf("routerStack.SetForwarding(%d): %s", ipv6.ProtocolNumber, err)
-			}
-
-			if err := host1Stack.AddAddress(host1NICID, arp.ProtocolNumber, arp.ProtocolAddress); err != nil {
-				t.Fatalf("host1Stack.AddAddress(%d, %d, %s): %s", host1NICID, arp.ProtocolNumber, arp.ProtocolAddress, err)
-			}
-			if err := routerStack.AddAddress(routerNICID1, arp.ProtocolNumber, arp.ProtocolAddress); err != nil {
-				t.Fatalf("routerStack.AddAddress(%d, %d, %s): %s", routerNICID1, arp.ProtocolNumber, arp.ProtocolAddress, err)
-			}
-			if err := routerStack.AddAddress(routerNICID2, arp.ProtocolNumber, arp.ProtocolAddress); err != nil {
-				t.Fatalf("routerStack.AddAddress(%d, %d, %s): %s", routerNICID2, arp.ProtocolNumber, arp.ProtocolAddress, err)
-			}
-			if err := host2Stack.AddAddress(host2NICID, arp.ProtocolNumber, arp.ProtocolAddress); err != nil {
-				t.Fatalf("host2Stack.AddAddress(%d, %d, %s): %s", host2NICID, arp.ProtocolNumber, arp.ProtocolAddress, err)
-			}
-
-			if err := host1Stack.AddProtocolAddress(host1NICID, host1IPv4Addr); err != nil {
-				t.Fatalf("host1Stack.AddProtocolAddress(%d, %#v): %s", host1NICID, host1IPv4Addr, err)
-			}
-			if err := routerStack.AddProtocolAddress(routerNICID1, routerNIC1IPv4Addr); err != nil {
-				t.Fatalf("routerStack.AddProtocolAddress(%d, %#v): %s", routerNICID1, routerNIC1IPv4Addr, err)
-			}
-			if err := routerStack.AddProtocolAddress(routerNICID2, routerNIC2IPv4Addr); err != nil {
-				t.Fatalf("routerStack.AddProtocolAddress(%d, %#v): %s", routerNICID2, routerNIC2IPv4Addr, err)
-			}
-			if err := host2Stack.AddProtocolAddress(host2NICID, host2IPv4Addr); err != nil {
-				t.Fatalf("host2Stack.AddProtocolAddress(%d, %#v): %s", host2NICID, host2IPv4Addr, err)
-			}
-			if err := host1Stack.AddProtocolAddress(host1NICID, host1IPv6Addr); err != nil {
-				t.Fatalf("host1Stack.AddProtocolAddress(%d, %#v): %s", host1NICID, host1IPv6Addr, err)
-			}
-			if err := routerStack.AddProtocolAddress(routerNICID1, routerNIC1IPv6Addr); err != nil {
-				t.Fatalf("routerStack.AddProtocolAddress(%d, %#v): %s", routerNICID1, routerNIC1IPv6Addr, err)
-			}
-			if err := routerStack.AddProtocolAddress(routerNICID2, routerNIC2IPv6Addr); err != nil {
-				t.Fatalf("routerStack.AddProtocolAddress(%d, %#v): %s", routerNICID2, routerNIC2IPv6Addr, err)
-			}
-			if err := host2Stack.AddProtocolAddress(host2NICID, host2IPv6Addr); err != nil {
-				t.Fatalf("host2Stack.AddProtocolAddress(%d, %#v): %s", host2NICID, host2IPv6Addr, err)
-			}
-
-			host1Stack.SetRouteTable([]tcpip.Route{
-				tcpip.Route{
-					Destination: host1IPv4Addr.AddressWithPrefix.Subnet(),
-					NIC:         host1NICID,
-				},
-				tcpip.Route{
-					Destination: host1IPv6Addr.AddressWithPrefix.Subnet(),
-					NIC:         host1NICID,
-				},
-				tcpip.Route{
-					Destination: host2IPv4Addr.AddressWithPrefix.Subnet(),
-					Gateway:     routerNIC1IPv4Addr.AddressWithPrefix.Address,
-					NIC:         host1NICID,
-				},
-				tcpip.Route{
-					Destination: host2IPv6Addr.AddressWithPrefix.Subnet(),
-					Gateway:     routerNIC1IPv6Addr.AddressWithPrefix.Address,
-					NIC:         host1NICID,
-				},
-			})
-			routerStack.SetRouteTable([]tcpip.Route{
-				tcpip.Route{
-					Destination: routerNIC1IPv4Addr.AddressWithPrefix.Subnet(),
-					NIC:         routerNICID1,
-				},
-				tcpip.Route{
-					Destination: routerNIC1IPv6Addr.AddressWithPrefix.Subnet(),
-					NIC:         routerNICID1,
-				},
-				tcpip.Route{
-					Destination: routerNIC2IPv4Addr.AddressWithPrefix.Subnet(),
-					NIC:         routerNICID2,
-				},
-				tcpip.Route{
-					Destination: routerNIC2IPv6Addr.AddressWithPrefix.Subnet(),
-					NIC:         routerNICID2,
-				},
-			})
-			host2Stack.SetRouteTable([]tcpip.Route{
-				tcpip.Route{
-					Destination: host2IPv4Addr.AddressWithPrefix.Subnet(),
-					NIC:         host2NICID,
-				},
-				tcpip.Route{
-					Destination: host2IPv6Addr.AddressWithPrefix.Subnet(),
-					NIC:         host2NICID,
-				},
-				tcpip.Route{
-					Destination: host1IPv4Addr.AddressWithPrefix.Subnet(),
-					Gateway:     routerNIC2IPv4Addr.AddressWithPrefix.Address,
-					NIC:         host2NICID,
-				},
-				tcpip.Route{
-					Destination: host1IPv6Addr.AddressWithPrefix.Subnet(),
-					Gateway:     routerNIC2IPv6Addr.AddressWithPrefix.Address,
-					NIC:         host2NICID,
-				},
-			})
-
-			epsAndAddrs := test.epAndAddrs(t, host1Stack, routerStack, host2Stack)
-			defer epsAndAddrs.serverEP.Close()
-			defer epsAndAddrs.clientEP.Close()
-
-			serverAddr := tcpip.FullAddress{Addr: epsAndAddrs.serverAddr, Port: listenPort}
-			if err := epsAndAddrs.serverEP.Bind(serverAddr); err != nil {
-				t.Fatalf("epsAndAddrs.serverEP.Bind(%#v): %s", serverAddr, err)
-			}
-			clientAddr := tcpip.FullAddress{Addr: epsAndAddrs.clientAddr}
-			if err := epsAndAddrs.clientEP.Bind(clientAddr); err != nil {
-				t.Fatalf("epsAndAddrs.clientEP.Bind(%#v): %s", clientAddr, err)
-			}
-
-			write := func(ep tcpip.Endpoint, data []byte, to *tcpip.FullAddress) {
-				t.Helper()
-
-				dataPayload := tcpip.SlicePayload(data)
-				wOpts := tcpip.WriteOptions{To: to}
-				n, ch, err := ep.Write(dataPayload, wOpts)
-				if err == tcpip.ErrNoLinkAddress {
-					// Wait for link resolution to complete.
-					<-ch
-
-					n, _, err = ep.Write(dataPayload, wOpts)
-				} else if err != nil {
-					t.Fatalf("ep.Write(_, _): %s", err)
-				}
-
-				if err != nil {
-					t.Fatalf("ep.Write(_, _): %s", err)
-				}
-				if want := int64(len(data)); n != want {
-					t.Fatalf("got ep.Write(_, _) = (%d, _, _), want = (%d, _, _)", n, want)
-				}
-			}
-
-			data := []byte{1, 2, 3, 4}
-			write(epsAndAddrs.clientEP, data, &serverAddr)
-
-			read := func(ch chan struct{}, ep tcpip.Endpoint, data []byte, expectedFrom tcpip.Address) tcpip.FullAddress {
-				t.Helper()
-
-				// Wait for the endpoint to be readable.
-				<-ch
-
-				var addr tcpip.FullAddress
-				v, _, err := ep.Read(&addr)
-				if err != nil {
-					t.Fatalf("ep.Read(_): %s", err)
-				}
-
-				if diff := cmp.Diff(v, buffer.View(data)); diff != "" {
-					t.Errorf("received data mismatch (-want +got):\n%s", diff)
-				}
-				if addr.Addr != expectedFrom {
-					t.Errorf("got addr.Addr = %s, want = %s", addr.Addr, expectedFrom)
-				}
-
-				if t.Failed() {
-					t.FailNow()
-				}
-
-				return addr
-			}
-
-			addr := read(epsAndAddrs.serverReadableCH, epsAndAddrs.serverEP, data, epsAndAddrs.clientAddr)
-			// Unspecify the NIC since NIC IDs are meaningless across stacks.
-			addr.NIC = 0
-
-			data = tcpip.SlicePayload([]byte{5, 6, 7, 8, 9, 10, 11, 12})
-			write(epsAndAddrs.serverEP, data, &addr)
-			addr = read(epsAndAddrs.clientReadableCH, epsAndAddrs.clientEP, data, epsAndAddrs.serverAddr)
-			if addr.Port != listenPort {
-				t.Errorf("got addr.Port = %d, want = %d", addr.Port, listenPort)
-			}
-		})
-	}
-}
diff --git a/pkg/tcpip/tests/integration/link_resolution_test.go b/pkg/tcpip/tests/integration/link_resolution_test.go
deleted file mode 100644
index bf3a6f6ee..000000000
--- a/pkg/tcpip/tests/integration/link_resolution_test.go
+++ /dev/null
@@ -1,219 +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 integration_test
-
-import (
-	"net"
-	"testing"
-
-	"github.com/google/go-cmp/cmp"
-	"gvisor.dev/gvisor/pkg/tcpip"
-	"gvisor.dev/gvisor/pkg/tcpip/buffer"
-	"gvisor.dev/gvisor/pkg/tcpip/header"
-	"gvisor.dev/gvisor/pkg/tcpip/link/pipe"
-	"gvisor.dev/gvisor/pkg/tcpip/network/arp"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
-	"gvisor.dev/gvisor/pkg/tcpip/stack"
-	"gvisor.dev/gvisor/pkg/tcpip/transport/icmp"
-	"gvisor.dev/gvisor/pkg/waiter"
-)
-
-var (
-	host1NICLinkAddr = tcpip.LinkAddress("\x02\x03\x03\x04\x05\x06")
-	host2NICLinkAddr = tcpip.LinkAddress("\x02\x03\x03\x04\x05\x09")
-
-	host1IPv4Addr = tcpip.ProtocolAddress{
-		Protocol: ipv4.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("192.168.0.1").To4()),
-			PrefixLen: 24,
-		},
-	}
-	host2IPv4Addr = tcpip.ProtocolAddress{
-		Protocol: ipv4.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("192.168.0.2").To4()),
-			PrefixLen: 8,
-		},
-	}
-	host1IPv6Addr = tcpip.ProtocolAddress{
-		Protocol: ipv6.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("a::1").To16()),
-			PrefixLen: 64,
-		},
-	}
-	host2IPv6Addr = tcpip.ProtocolAddress{
-		Protocol: ipv6.ProtocolNumber,
-		AddressWithPrefix: tcpip.AddressWithPrefix{
-			Address:   tcpip.Address(net.ParseIP("a::2").To16()),
-			PrefixLen: 64,
-		},
-	}
-)
-
-// TestPing tests that two hosts can ping eachother when link resolution is
-// enabled.
-func TestPing(t *testing.T) {
-	const (
-		host1NICID = 1
-		host2NICID = 4
-
-		// icmpDataOffset is the offset to the data in both ICMPv4 and ICMPv6 echo
-		// request/reply packets.
-		icmpDataOffset = 8
-	)
-
-	tests := []struct {
-		name       string
-		transProto tcpip.TransportProtocolNumber
-		netProto   tcpip.NetworkProtocolNumber
-		remoteAddr tcpip.Address
-		icmpBuf    func(*testing.T) buffer.View
-	}{
-		{
-			name:       "IPv4 Ping",
-			transProto: icmp.ProtocolNumber4,
-			netProto:   ipv4.ProtocolNumber,
-			remoteAddr: host2IPv4Addr.AddressWithPrefix.Address,
-			icmpBuf: func(t *testing.T) buffer.View {
-				data := [8]byte{1, 2, 3, 4, 5, 6, 7, 8}
-				hdr := header.ICMPv4(make([]byte, header.ICMPv4MinimumSize+len(data)))
-				hdr.SetType(header.ICMPv4Echo)
-				if n := copy(hdr.Payload(), data[:]); n != len(data) {
-					t.Fatalf("copied %d bytes but expected to copy %d bytes", n, len(data))
-				}
-				return buffer.View(hdr)
-			},
-		},
-		{
-			name:       "IPv6 Ping",
-			transProto: icmp.ProtocolNumber6,
-			netProto:   ipv6.ProtocolNumber,
-			remoteAddr: host2IPv6Addr.AddressWithPrefix.Address,
-			icmpBuf: func(t *testing.T) buffer.View {
-				data := [8]byte{1, 2, 3, 4, 5, 6, 7, 8}
-				hdr := header.ICMPv6(make([]byte, header.ICMPv6MinimumSize+len(data)))
-				hdr.SetType(header.ICMPv6EchoRequest)
-				if n := copy(hdr.Payload(), data[:]); n != len(data) {
-					t.Fatalf("copied %d bytes but expected to copy %d bytes", n, len(data))
-				}
-				return buffer.View(hdr)
-			},
-		},
-	}
-
-	for _, test := range tests {
-		t.Run(test.name, func(t *testing.T) {
-			stackOpts := stack.Options{
-				NetworkProtocols:   []stack.NetworkProtocolFactory{arp.NewProtocol, ipv4.NewProtocol, ipv6.NewProtocol},
-				TransportProtocols: []stack.TransportProtocolFactory{icmp.NewProtocol4, icmp.NewProtocol6},
-			}
-
-			host1Stack := stack.New(stackOpts)
-			host2Stack := stack.New(stackOpts)
-
-			host1NIC, host2NIC := pipe.New(host1NICLinkAddr, host2NICLinkAddr, stack.CapabilityResolutionRequired)
-
-			if err := host1Stack.CreateNIC(host1NICID, host1NIC); err != nil {
-				t.Fatalf("host1Stack.CreateNIC(%d, _): %s", host1NICID, err)
-			}
-			if err := host2Stack.CreateNIC(host2NICID, host2NIC); err != nil {
-				t.Fatalf("host2Stack.CreateNIC(%d, _): %s", host2NICID, err)
-			}
-
-			if err := host1Stack.AddAddress(host1NICID, arp.ProtocolNumber, arp.ProtocolAddress); err != nil {
-				t.Fatalf("host1Stack.AddAddress(%d, %d, %s): %s", host1NICID, arp.ProtocolNumber, arp.ProtocolAddress, err)
-			}
-			if err := host2Stack.AddAddress(host2NICID, arp.ProtocolNumber, arp.ProtocolAddress); err != nil {
-				t.Fatalf("host2Stack.AddAddress(%d, %d, %s): %s", host2NICID, arp.ProtocolNumber, arp.ProtocolAddress, err)
-			}
-
-			if err := host1Stack.AddProtocolAddress(host1NICID, host1IPv4Addr); err != nil {
-				t.Fatalf("host1Stack.AddProtocolAddress(%d, %#v): %s", host1NICID, host1IPv4Addr, err)
-			}
-			if err := host2Stack.AddProtocolAddress(host2NICID, host2IPv4Addr); err != nil {
-				t.Fatalf("host2Stack.AddProtocolAddress(%d, %#v): %s", host2NICID, host2IPv4Addr, err)
-			}
-			if err := host1Stack.AddProtocolAddress(host1NICID, host1IPv6Addr); err != nil {
-				t.Fatalf("host1Stack.AddProtocolAddress(%d, %#v): %s", host1NICID, host1IPv6Addr, err)
-			}
-			if err := host2Stack.AddProtocolAddress(host2NICID, host2IPv6Addr); err != nil {
-				t.Fatalf("host2Stack.AddProtocolAddress(%d, %#v): %s", host2NICID, host2IPv6Addr, err)
-			}
-
-			host1Stack.SetRouteTable([]tcpip.Route{
-				tcpip.Route{
-					Destination: host1IPv4Addr.AddressWithPrefix.Subnet(),
-					NIC:         host1NICID,
-				},
-				tcpip.Route{
-					Destination: host1IPv6Addr.AddressWithPrefix.Subnet(),
-					NIC:         host1NICID,
-				},
-			})
-			host2Stack.SetRouteTable([]tcpip.Route{
-				tcpip.Route{
-					Destination: host2IPv4Addr.AddressWithPrefix.Subnet(),
-					NIC:         host2NICID,
-				},
-				tcpip.Route{
-					Destination: host2IPv6Addr.AddressWithPrefix.Subnet(),
-					NIC:         host2NICID,
-				},
-			})
-
-			var wq waiter.Queue
-			we, waiterCH := waiter.NewChannelEntry(nil)
-			wq.EventRegister(&we, waiter.EventIn)
-			ep, err := host1Stack.NewEndpoint(test.transProto, test.netProto, &wq)
-			if err != nil {
-				t.Fatalf("host1Stack.NewEndpoint(%d, %d, _): %s", test.transProto, test.netProto, err)
-			}
-			defer ep.Close()
-
-			// The first write should trigger link resolution.
-			icmpBuf := test.icmpBuf(t)
-			wOpts := tcpip.WriteOptions{To: &tcpip.FullAddress{Addr: test.remoteAddr}}
-			if _, ch, err := ep.Write(tcpip.SlicePayload(icmpBuf), wOpts); err != tcpip.ErrNoLinkAddress {
-				t.Fatalf("got ep.Write(_, _) = %s, want = %s", err, tcpip.ErrNoLinkAddress)
-			} else {
-				// Wait for link resolution to complete.
-				<-ch
-			}
-			if n, _, err := ep.Write(tcpip.SlicePayload(icmpBuf), wOpts); err != nil {
-				t.Fatalf("ep.Write(_, _): %s", err)
-			} else if want := int64(len(icmpBuf)); n != want {
-				t.Fatalf("got ep.Write(_, _) = (%d, _, _), want = (%d, _, _)", n, want)
-			}
-
-			// Wait for the endpoint to be readable.
-			<-waiterCH
-
-			var addr tcpip.FullAddress
-			v, _, err := ep.Read(&addr)
-			if err != nil {
-				t.Fatalf("ep.Read(_): %s", err)
-			}
-			if diff := cmp.Diff(v[icmpDataOffset:], icmpBuf[icmpDataOffset:]); diff != "" {
-				t.Errorf("received data mismatch (-want +got):\n%s", diff)
-			}
-			if addr.Addr != test.remoteAddr {
-				t.Errorf("got addr.Addr = %s, want = %s", addr.Addr, test.remoteAddr)
-			}
-		})
-	}
-}