diff options
Diffstat (limited to 'test/packetimpact/tests')
26 files changed, 971 insertions, 720 deletions
diff --git a/test/packetimpact/tests/BUILD b/test/packetimpact/tests/BUILD index d4fcf31fa..2a41ef326 100644 --- a/test/packetimpact/tests/BUILD +++ b/test/packetimpact/tests/BUILD @@ -1,4 +1,4 @@ -load("defs.bzl", "packetimpact_go_test") +load("//test/packetimpact/runner:defs.bzl", "packetimpact_go_test") package( default_visibility = ["//test/packetimpact:__subpackages__"], @@ -16,6 +16,19 @@ packetimpact_go_test( ) packetimpact_go_test( + name = "ipv4_id_uniqueness", + srcs = ["ipv4_id_uniqueness_test.go"], + # TODO(b/157506701) Fix netstack then remove the line below. + expect_netstack_failure = True, + deps = [ + "//pkg/abi/linux", + "//pkg/tcpip/header", + "//test/packetimpact/testbench", + "@org_golang_x_sys//unix:go_default_library", + ], +) + +packetimpact_go_test( name = "udp_recv_multicast", srcs = ["udp_recv_multicast_test.go"], # TODO(b/152813495): Fix netstack then remove the line below. @@ -31,8 +44,6 @@ packetimpact_go_test( packetimpact_go_test( name = "udp_icmp_error_propagation", srcs = ["udp_icmp_error_propagation_test.go"], - # TODO(b/153926291): Fix netstack then remove the line below. - expect_netstack_failure = True, deps = [ "//pkg/tcpip", "//pkg/tcpip/header", @@ -113,10 +124,8 @@ packetimpact_go_test( ) packetimpact_go_test( - name = "tcp_should_piggyback", - srcs = ["tcp_should_piggyback_test.go"], - # TODO(b/153680566): Fix netstack then remove the line below. - expect_netstack_failure = True, + name = "tcp_send_window_sizes_piggyback", + srcs = ["tcp_send_window_sizes_piggyback_test.go"], deps = [ "//pkg/tcpip/header", "//test/packetimpact/testbench", @@ -136,6 +145,19 @@ packetimpact_go_test( ) packetimpact_go_test( + name = "tcp_paws_mechanism", + srcs = ["tcp_paws_mechanism_test.go"], + # TODO(b/156682000): Fix netstack then remove the line below. + expect_netstack_failure = True, + deps = [ + "//pkg/tcpip/header", + "//pkg/tcpip/seqnum", + "//test/packetimpact/testbench", + "@org_golang_x_sys//unix:go_default_library", + ], +) + +packetimpact_go_test( name = "tcp_user_timeout", srcs = ["tcp_user_timeout_test.go"], deps = [ @@ -146,6 +168,58 @@ packetimpact_go_test( ) packetimpact_go_test( + name = "tcp_queue_receive_in_syn_sent", + srcs = ["tcp_queue_receive_in_syn_sent_test.go"], + # TODO(b/157658105): Fix netstack then remove the line below. + expect_netstack_failure = True, + deps = [ + "//pkg/tcpip/header", + "//test/packetimpact/testbench", + "@org_golang_x_sys//unix:go_default_library", + ], +) + +packetimpact_go_test( + name = "tcp_synsent_reset", + srcs = ["tcp_synsent_reset_test.go"], + deps = [ + "//pkg/tcpip/header", + "//test/packetimpact/testbench", + "@org_golang_x_sys//unix:go_default_library", + ], +) + +packetimpact_go_test( + name = "tcp_synrcvd_reset", + srcs = ["tcp_synrcvd_reset_test.go"], + deps = [ + "//pkg/tcpip/header", + "//test/packetimpact/testbench", + "@org_golang_x_sys//unix:go_default_library", + ], +) + +packetimpact_go_test( + name = "tcp_splitseg_mss", + srcs = ["tcp_splitseg_mss_test.go"], + deps = [ + "//pkg/tcpip/header", + "//test/packetimpact/testbench", + "@org_golang_x_sys//unix:go_default_library", + ], +) + +packetimpact_go_test( + name = "tcp_cork_mss", + srcs = ["tcp_cork_mss_test.go"], + deps = [ + "//pkg/tcpip/header", + "//test/packetimpact/testbench", + "@org_golang_x_sys//unix:go_default_library", + ], +) + +packetimpact_go_test( name = "icmpv6_param_problem", srcs = ["icmpv6_param_problem_test.go"], # TODO(b/153485026): Fix netstack then remove the line below. @@ -166,8 +240,3 @@ 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/tests/defs.bzl b/test/packetimpact/tests/defs.bzl deleted file mode 100644 index 45dce64ab..000000000 --- a/test/packetimpact/tests/defs.bzl +++ /dev/null @@ -1,137 +0,0 @@ -"""Defines rules for packetimpact test targets.""" - -load("//tools:defs.bzl", "go_test") - -def _packetimpact_test_impl(ctx): - test_runner = ctx.executable._test_runner - bench = ctx.actions.declare_file("%s-bench" % ctx.label.name) - bench_content = "\n".join([ - "#!/bin/bash", - # This test will run part in a distinct user namespace. This can cause - # 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 -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, - ), - ]) - ctx.actions.write(bench, bench_content, is_executable = True) - - transitive_files = depset() - if hasattr(ctx.attr._test_runner, "data_runfiles"): - transitive_files = depset(ctx.attr._test_runner.data_runfiles.files) - runfiles = ctx.runfiles( - files = [test_runner] + ctx.files.testbench_binary + ctx.files._posix_server_binary, - transitive_files = transitive_files, - collect_default = True, - collect_data = True, - ) - return [DefaultInfo(executable = bench, runfiles = runfiles)] - -_packetimpact_test = rule( - attrs = { - "_test_runner": attr.label( - executable = True, - cfg = "target", - default = ":test_runner", - ), - "_posix_server_binary": attr.label( - cfg = "target", - default = "//test/packetimpact/dut:posix_server", - ), - "testbench_binary": attr.label( - cfg = "target", - mandatory = True, - ), - "flags": attr.string_list( - mandatory = False, - default = [], - ), - }, - test = True, - implementation = _packetimpact_test_impl, -) - -PACKETIMPACT_TAGS = ["local", "manual"] - -def packetimpact_linux_test( - name, - testbench_binary, - expect_failure = False, - **kwargs): - """Add a packetimpact test on linux. - - Args: - name: name of the test - testbench_binary: the testbench binary - **kwargs: all the other args, forwarded to _packetimpact_test - """ - expect_failure_flag = ["--expect_failure"] if expect_failure else [] - _packetimpact_test( - name = name + "_linux_test", - testbench_binary = testbench_binary, - flags = ["--dut_platform", "linux"] + expect_failure_flag, - tags = PACKETIMPACT_TAGS + ["packetimpact"], - **kwargs - ) - -def packetimpact_netstack_test( - name, - testbench_binary, - expect_failure = False, - **kwargs): - """Add a packetimpact test on netstack. - - Args: - name: name of the test - testbench_binary: the testbench binary - expect_failure: the test must fail - **kwargs: all the other args, forwarded to _packetimpact_test - """ - expect_failure_flag = [] - if expect_failure: - expect_failure_flag = ["--expect_failure"] - _packetimpact_test( - name = name + "_netstack_test", - testbench_binary = testbench_binary, - # This is the default runtime unless - # "--test_arg=--runtime=OTHER_RUNTIME" is used to override the value. - flags = ["--dut_platform", "netstack", "--runtime=runsc-d"] + expect_failure_flag, - tags = PACKETIMPACT_TAGS + ["packetimpact"], - **kwargs - ) - -def packetimpact_go_test(name, size = "small", pure = True, expect_linux_failure = False, expect_netstack_failure = False, **kwargs): - """Add packetimpact tests written in go. - - Args: - name: name of the test - size: size of the test - pure: make a static go binary - expect_linux_failure: expect the test to fail for Linux - expect_netstack_failure: expect the test to fail for Netstack - **kwargs: all the other args, forwarded to go_test - """ - testbench_binary = name + "_test" - go_test( - name = testbench_binary, - size = size, - pure = pure, - tags = PACKETIMPACT_TAGS, - **kwargs - ) - packetimpact_linux_test( - name = name, - expect_failure = expect_linux_failure, - testbench_binary = testbench_binary, - ) - packetimpact_netstack_test( - name = name, - expect_failure = expect_netstack_failure, - testbench_binary = testbench_binary, - ) diff --git a/test/packetimpact/tests/fin_wait2_timeout_test.go b/test/packetimpact/tests/fin_wait2_timeout_test.go index c26ab78d9..407565078 100644 --- a/test/packetimpact/tests/fin_wait2_timeout_test.go +++ b/test/packetimpact/tests/fin_wait2_timeout_test.go @@ -21,11 +21,11 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } func TestFinWait2Timeout(t *testing.T) { @@ -37,13 +37,13 @@ func TestFinWait2Timeout(t *testing.T) { {"WithoutLinger2", false}, } { t.Run(tt.description, func(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) defer dut.Close(listenFd) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.TCP{SrcPort: &remotePort}) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) defer conn.Close() - conn.Handshake() + conn.Connect() acceptFd, _ := dut.Accept(listenFd) if tt.linger2 { @@ -52,21 +52,21 @@ func TestFinWait2Timeout(t *testing.T) { } dut.Close(acceptFd) - if _, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagFin | header.TCPFlagAck)}, time.Second); err != nil { + if _, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagFin | header.TCPFlagAck)}, time.Second); err != nil { t.Fatalf("expected a FIN-ACK within 1 second but got none: %s", err) } - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) time.Sleep(5 * time.Second) conn.Drain() - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) if tt.linger2 { - if _, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagRst)}, time.Second); err != nil { + if _, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagRst)}, time.Second); err != nil { t.Fatalf("expected a RST packet within a second but got none: %s", err) } } else { - if got, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagRst)}, 10*time.Second); got != nil || err == nil { + if got, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagRst)}, 10*time.Second); got != nil || err == nil { t.Fatalf("expected no RST packets within ten seconds but got one: %s", got) } } diff --git a/test/packetimpact/tests/icmpv6_param_problem_test.go b/test/packetimpact/tests/icmpv6_param_problem_test.go index bb1fc26fc..961059fc1 100644 --- a/test/packetimpact/tests/icmpv6_param_problem_test.go +++ b/test/packetimpact/tests/icmpv6_param_problem_test.go @@ -21,27 +21,27 @@ import ( "time" "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } // TestICMPv6ParamProblemTest sends a packet with a bad next header. The DUT // should respond with an ICMPv6 Parameter Problem message. func TestICMPv6ParamProblemTest(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() - conn := tb.NewIPv6Conn(t, tb.IPv6{}, tb.IPv6{}) + conn := testbench.NewIPv6Conn(t, testbench.IPv6{}, testbench.IPv6{}) defer conn.Close() - ipv6 := tb.IPv6{ + ipv6 := testbench.IPv6{ // 254 is reserved and used for experimentation and testing. This should // cause an error. - NextHeader: tb.Uint8(254), + NextHeader: testbench.Uint8(254), } - icmpv6 := tb.ICMPv6{ - Type: tb.ICMPv6Type(header.ICMPv6EchoRequest), + icmpv6 := testbench.ICMPv6{ + Type: testbench.ICMPv6Type(header.ICMPv6EchoRequest), NDPPayload: []byte("hello world"), } @@ -61,14 +61,14 @@ func TestICMPv6ParamProblemTest(t *testing.T) { b := make([]byte, 4) binary.BigEndian.PutUint32(b, header.IPv6NextHeaderOffset) expectedPayload = append(b, expectedPayload...) - expectedICMPv6 := tb.ICMPv6{ - Type: tb.ICMPv6Type(header.ICMPv6ParamProblem), + expectedICMPv6 := testbench.ICMPv6{ + Type: testbench.ICMPv6Type(header.ICMPv6ParamProblem), NDPPayload: expectedPayload, } - paramProblem := tb.Layers{ - &tb.Ether{}, - &tb.IPv6{}, + paramProblem := testbench.Layers{ + &testbench.Ether{}, + &testbench.IPv6{}, &expectedICMPv6, } timeout := time.Second diff --git a/test/packetimpact/tests/ipv4_id_uniqueness_test.go b/test/packetimpact/tests/ipv4_id_uniqueness_test.go new file mode 100644 index 000000000..4efb9829c --- /dev/null +++ b/test/packetimpact/tests/ipv4_id_uniqueness_test.go @@ -0,0 +1,111 @@ +// 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 ipv4_id_uniqueness_test + +import ( + "context" + "flag" + "fmt" + "testing" + "time" + + "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/abi/linux" + "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/test/packetimpact/testbench" +) + +func init() { + testbench.RegisterFlags(flag.CommandLine) +} + +func recvTCPSegment(conn *testbench.TCPIPv4, expect *testbench.TCP, expectPayload *testbench.Payload) (uint16, error) { + layers, err := conn.ExpectData(expect, expectPayload, time.Second) + if err != nil { + return 0, fmt.Errorf("failed to receive TCP segment: %s", err) + } + if len(layers) < 2 { + return 0, fmt.Errorf("got packet with layers: %v, expected to have at least 2 layers (link and network)", layers) + } + ipv4, ok := layers[1].(*testbench.IPv4) + if !ok { + return 0, fmt.Errorf("got network layer: %T, expected: *IPv4", layers[1]) + } + if *ipv4.Flags&header.IPv4FlagDontFragment != 0 { + return 0, fmt.Errorf("got IPv4 DF=1, expected DF=0") + } + return *ipv4.ID, nil +} + +// RFC 6864 section 4.2 states: "The IPv4 ID of non-atomic datagrams MUST NOT +// be reused when sending a copy of an earlier non-atomic datagram." +// +// This test creates a TCP connection, uses the IP_MTU_DISCOVER socket option +// to force the DF bit to be 0, and checks that a retransmitted segment has a +// different IPv4 Identification value than the original segment. +func TestIPv4RetransmitIdentificationUniqueness(t *testing.T) { + dut := testbench.NewDUT(t) + defer dut.TearDown() + + listenFD, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) + defer dut.Close(listenFD) + + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) + defer conn.Close() + + conn.Connect() + remoteFD, _ := dut.Accept(listenFD) + defer dut.Close(remoteFD) + + dut.SetSockOptInt(remoteFD, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) + + // TODO(b/129291778) The following socket option clears the DF bit on + // IP packets sent over the socket, and is currently not supported by + // gVisor. gVisor by default sends packets with DF=0 anyway, so the + // socket option being not supported does not affect the operation of + // this test. Once the socket option is supported, the following call + // can be changed to simply assert success. + ret, errno := dut.SetSockOptIntWithErrno(context.Background(), remoteFD, unix.IPPROTO_IP, linux.IP_MTU_DISCOVER, linux.IP_PMTUDISC_DONT) + if ret == -1 && errno != unix.ENOTSUP { + t.Fatalf("failed to set IP_MTU_DISCOVER socket option to IP_PMTUDISC_DONT: %s", errno) + } + + sampleData := []byte("Sample Data") + samplePayload := &testbench.Payload{Bytes: sampleData} + + dut.Send(remoteFD, sampleData, 0) + if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { + t.Fatalf("failed to receive TCP segment sent for RTT calculation: %s", err) + } + // Let the DUT estimate RTO with RTT from the DATA-ACK. + // TODO(gvisor.dev/issue/2685) Estimate RTO during handshake, after which + // we can skip sending this ACK. + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) + + expectTCP := &testbench.TCP{SeqNum: testbench.Uint32(uint32(*conn.RemoteSeqNum()))} + dut.Send(remoteFD, sampleData, 0) + originalID, err := recvTCPSegment(&conn, expectTCP, samplePayload) + if err != nil { + t.Fatalf("failed to receive TCP segment: %s", err) + } + + retransmitID, err := recvTCPSegment(&conn, expectTCP, samplePayload) + if err != nil { + t.Fatalf("failed to receive retransmitted TCP segment: %s", err) + } + if originalID == retransmitID { + t.Fatalf("unexpectedly got retransmitted TCP segment with same IPv4 ID field=%d", originalID) + } +} diff --git a/test/packetimpact/tests/tcp_close_wait_ack_test.go b/test/packetimpact/tests/tcp_close_wait_ack_test.go index 70a22a2db..6e7ff41d7 100644 --- a/test/packetimpact/tests/tcp_close_wait_ack_test.go +++ b/test/packetimpact/tests/tcp_close_wait_ack_test.go @@ -23,17 +23,17 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/pkg/tcpip/seqnum" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } func TestCloseWaitAck(t *testing.T) { for _, tt := range []struct { description string - makeTestingTCP func(conn *tb.TCPIPv4, seqNumOffset seqnum.Size, windowSize seqnum.Size) tb.TCP + makeTestingTCP func(conn *testbench.TCPIPv4, seqNumOffset seqnum.Size, windowSize seqnum.Size) testbench.TCP seqNumOffset seqnum.Size expectAck bool }{ @@ -45,27 +45,27 @@ func TestCloseWaitAck(t *testing.T) { {"ACK", GenerateUnaccACKSegment, 2, true}, } { t.Run(fmt.Sprintf("%s%d", tt.description, tt.seqNumOffset), func(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) defer dut.Close(listenFd) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.TCP{SrcPort: &remotePort}) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) defer conn.Close() - conn.Handshake() + conn.Connect() acceptFd, _ := dut.Accept(listenFd) // Send a FIN to DUT to intiate the active close - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck | header.TCPFlagFin)}) - gotTCP, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}, time.Second) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagFin)}) + gotTCP, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, time.Second) if err != nil { t.Fatalf("expected an ACK for our fin and DUT should enter CLOSE_WAIT: %s", err) } windowSize := seqnum.Size(*gotTCP.WindowSize) // Send a segment with OTW Seq / unacc ACK and expect an ACK back - conn.Send(tt.makeTestingTCP(&conn, tt.seqNumOffset, windowSize), &tb.Payload{Bytes: []byte("Sample Data")}) - gotAck, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}, time.Second) + conn.Send(tt.makeTestingTCP(&conn, tt.seqNumOffset, windowSize), &testbench.Payload{Bytes: []byte("Sample Data")}) + gotAck, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, time.Second) if tt.expectAck && err != nil { t.Fatalf("expected an ack but got none: %s", err) } @@ -75,14 +75,14 @@ func TestCloseWaitAck(t *testing.T) { // Now let's verify DUT is indeed in CLOSE_WAIT dut.Close(acceptFd) - if _, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck | header.TCPFlagFin)}, time.Second); err != nil { + if _, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagFin)}, time.Second); err != nil { t.Fatalf("expected DUT to send a FIN: %s", err) } // Ack the FIN from DUT - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) // Send some extra data to DUT - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}, &tb.Payload{Bytes: []byte("Sample Data")}) - if _, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagRst)}, time.Second); err != nil { + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, &testbench.Payload{Bytes: []byte("Sample Data")}) + if _, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagRst)}, time.Second); err != nil { t.Fatalf("expected DUT to send an RST: %s", err) } }) @@ -92,17 +92,17 @@ func TestCloseWaitAck(t *testing.T) { // This generates an segment with seqnum = RCV.NXT + RCV.WND + seqNumOffset, the // generated segment is only acceptable when seqNumOffset is 0, otherwise an ACK // is expected from the receiver. -func GenerateOTWSeqSegment(conn *tb.TCPIPv4, seqNumOffset seqnum.Size, windowSize seqnum.Size) tb.TCP { +func GenerateOTWSeqSegment(conn *testbench.TCPIPv4, seqNumOffset seqnum.Size, windowSize seqnum.Size) testbench.TCP { lastAcceptable := conn.LocalSeqNum().Add(windowSize) otwSeq := uint32(lastAcceptable.Add(seqNumOffset)) - return tb.TCP{SeqNum: tb.Uint32(otwSeq), Flags: tb.Uint8(header.TCPFlagAck)} + return testbench.TCP{SeqNum: testbench.Uint32(otwSeq), Flags: testbench.Uint8(header.TCPFlagAck)} } // This generates an segment with acknum = SND.NXT + seqNumOffset, the generated // segment is only acceptable when seqNumOffset is 0, otherwise an ACK is // expected from the receiver. -func GenerateUnaccACKSegment(conn *tb.TCPIPv4, seqNumOffset seqnum.Size, windowSize seqnum.Size) tb.TCP { +func GenerateUnaccACKSegment(conn *testbench.TCPIPv4, seqNumOffset seqnum.Size, windowSize seqnum.Size) testbench.TCP { lastAcceptable := conn.RemoteSeqNum() unaccAck := uint32(lastAcceptable.Add(seqNumOffset)) - return tb.TCP{AckNum: tb.Uint32(unaccAck), Flags: tb.Uint8(header.TCPFlagAck)} + return testbench.TCP{AckNum: testbench.Uint32(unaccAck), Flags: testbench.Uint8(header.TCPFlagAck)} } diff --git a/test/packetimpact/tests/tcp_cork_mss_test.go b/test/packetimpact/tests/tcp_cork_mss_test.go new file mode 100644 index 000000000..fb8f48629 --- /dev/null +++ b/test/packetimpact/tests/tcp_cork_mss_test.go @@ -0,0 +1,84 @@ +// 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 tcp_cork_mss_test + +import ( + "flag" + "testing" + "time" + + "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/test/packetimpact/testbench" +) + +func init() { + testbench.RegisterFlags(flag.CommandLine) +} + +// TestTCPCorkMSS tests for segment coalesce and split as per MSS. +func TestTCPCorkMSS(t *testing.T) { + dut := testbench.NewDUT(t) + defer dut.TearDown() + listenFD, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) + defer dut.Close(listenFD) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) + defer conn.Close() + + const mss = uint32(header.TCPDefaultMSS) + options := make([]byte, header.TCPOptionMSSLength) + header.EncodeMSSOption(mss, options) + conn.ConnectWithOptions(options) + + acceptFD, _ := dut.Accept(listenFD) + defer dut.Close(acceptFD) + + dut.SetSockOptInt(acceptFD, unix.IPPROTO_TCP, unix.TCP_CORK, 1) + + // Let the dut application send 2 small segments to be held up and coalesced + // until the application sends a larger segment to fill up to > MSS. + sampleData := []byte("Sample Data") + dut.Send(acceptFD, sampleData, 0) + dut.Send(acceptFD, sampleData, 0) + + expectedData := sampleData + expectedData = append(expectedData, sampleData...) + largeData := make([]byte, mss+1) + expectedData = append(expectedData, largeData...) + dut.Send(acceptFD, largeData, 0) + + // Expect the segments to be coalesced and sent and capped to MSS. + expectedPayload := testbench.Payload{Bytes: expectedData[:mss]} + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, &expectedPayload, time.Second); err != nil { + t.Fatalf("expected payload was not received: %s", err) + } + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) + // Expect the coalesced segment to be split and transmitted. + expectedPayload = testbench.Payload{Bytes: expectedData[mss:]} + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, &expectedPayload, time.Second); err != nil { + t.Fatalf("expected payload was not received: %s", err) + } + + // Check for segments to *not* be held up because of TCP_CORK when + // the current send window is less than MSS. + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(uint16(2 * len(sampleData)))}) + dut.Send(acceptFD, sampleData, 0) + dut.Send(acceptFD, sampleData, 0) + expectedPayload = testbench.Payload{Bytes: append(sampleData, sampleData...)} + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, &expectedPayload, time.Second); err != nil { + t.Fatalf("expected payload was not received: %s", err) + } + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) +} diff --git a/test/packetimpact/tests/tcp_noaccept_close_rst_test.go b/test/packetimpact/tests/tcp_noaccept_close_rst_test.go index 2c1ec27d3..b9b3e91d3 100644 --- a/test/packetimpact/tests/tcp_noaccept_close_rst_test.go +++ b/test/packetimpact/tests/tcp_noaccept_close_rst_test.go @@ -21,22 +21,22 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } func TestTcpNoAcceptCloseReset(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.TCP{SrcPort: &remotePort}) - conn.Handshake() + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) + conn.Connect() defer conn.Close() dut.Close(listenFd) - if _, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagRst | header.TCPFlagAck)}, 1*time.Second); err != nil { + if _, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagRst | header.TCPFlagAck)}, 1*time.Second); err != nil { t.Fatalf("expected a RST-ACK packet but got none: %s", err) } } diff --git a/test/packetimpact/tests/tcp_outside_the_window_test.go b/test/packetimpact/tests/tcp_outside_the_window_test.go index 351df193e..ad8c74234 100644 --- a/test/packetimpact/tests/tcp_outside_the_window_test.go +++ b/test/packetimpact/tests/tcp_outside_the_window_test.go @@ -23,11 +23,11 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" "gvisor.dev/gvisor/pkg/tcpip/seqnum" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } // TestTCPOutsideTheWindows tests the behavior of the DUT when packets arrive @@ -38,7 +38,7 @@ func TestTCPOutsideTheWindow(t *testing.T) { for _, tt := range []struct { description string tcpFlags uint8 - payload []tb.Layer + payload []testbench.Layer seqNumOffset seqnum.Size expectACK bool }{ @@ -46,28 +46,28 @@ func TestTCPOutsideTheWindow(t *testing.T) { {"SYNACK", header.TCPFlagSyn | header.TCPFlagAck, nil, 0, true}, {"ACK", header.TCPFlagAck, nil, 0, false}, {"FIN", header.TCPFlagFin, nil, 0, false}, - {"Data", header.TCPFlagAck, []tb.Layer{&tb.Payload{Bytes: []byte("abc123")}}, 0, true}, + {"Data", header.TCPFlagAck, []testbench.Layer{&testbench.Payload{Bytes: []byte("abc123")}}, 0, true}, {"SYN", header.TCPFlagSyn, nil, 1, true}, {"SYNACK", header.TCPFlagSyn | header.TCPFlagAck, nil, 1, true}, {"ACK", header.TCPFlagAck, nil, 1, true}, {"FIN", header.TCPFlagFin, nil, 1, false}, - {"Data", header.TCPFlagAck, []tb.Layer{&tb.Payload{Bytes: []byte("abc123")}}, 1, true}, + {"Data", header.TCPFlagAck, []testbench.Layer{&testbench.Payload{Bytes: []byte("abc123")}}, 1, true}, {"SYN", header.TCPFlagSyn, nil, 2, true}, {"SYNACK", header.TCPFlagSyn | header.TCPFlagAck, nil, 2, true}, {"ACK", header.TCPFlagAck, nil, 2, true}, {"FIN", header.TCPFlagFin, nil, 2, false}, - {"Data", header.TCPFlagAck, []tb.Layer{&tb.Payload{Bytes: []byte("abc123")}}, 2, true}, + {"Data", header.TCPFlagAck, []testbench.Layer{&testbench.Payload{Bytes: []byte("abc123")}}, 2, true}, } { t.Run(fmt.Sprintf("%s%d", tt.description, tt.seqNumOffset), func(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() listenFD, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) defer dut.Close(listenFD) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.TCP{SrcPort: &remotePort}) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) defer conn.Close() - conn.Handshake() + conn.Connect() acceptFD, _ := dut.Accept(listenFD) defer dut.Close(acceptFD) @@ -75,13 +75,13 @@ func TestTCPOutsideTheWindow(t *testing.T) { conn.Drain() // Ignore whatever incrementing that this out-of-order packet might cause // to the AckNum. - localSeqNum := tb.Uint32(uint32(*conn.LocalSeqNum())) - conn.Send(tb.TCP{ - Flags: tb.Uint8(tt.tcpFlags), - SeqNum: tb.Uint32(uint32(conn.LocalSeqNum().Add(windowSize))), + localSeqNum := testbench.Uint32(uint32(*conn.LocalSeqNum())) + conn.Send(testbench.TCP{ + Flags: testbench.Uint8(tt.tcpFlags), + SeqNum: testbench.Uint32(uint32(conn.LocalSeqNum().Add(windowSize))), }, tt.payload...) timeout := 3 * time.Second - gotACK, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), AckNum: localSeqNum}, timeout) + gotACK, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), AckNum: localSeqNum}, timeout) if tt.expectACK && err != nil { t.Fatalf("expected an ACK packet within %s but got none: %s", timeout, err) } diff --git a/test/packetimpact/tests/tcp_paws_mechanism_test.go b/test/packetimpact/tests/tcp_paws_mechanism_test.go new file mode 100644 index 000000000..55db4ece6 --- /dev/null +++ b/test/packetimpact/tests/tcp_paws_mechanism_test.go @@ -0,0 +1,109 @@ +// 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 tcp_paws_mechanism_test + +import ( + "encoding/hex" + "flag" + "testing" + "time" + + "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/test/packetimpact/testbench" +) + +func init() { + testbench.RegisterFlags(flag.CommandLine) +} + +func TestPAWSMechanism(t *testing.T) { + dut := testbench.NewDUT(t) + defer dut.TearDown() + listenFD, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) + defer dut.Close(listenFD) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) + defer conn.Close() + + options := make([]byte, header.TCPOptionTSLength) + header.EncodeTSOption(currentTS(), 0, options) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagSyn), Options: options}) + synAck, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagSyn | header.TCPFlagAck)}, time.Second) + if err != nil { + t.Fatalf("didn't get synack during handshake: %s", err) + } + parsedSynOpts := header.ParseSynOptions(synAck.Options, true) + if !parsedSynOpts.TS { + t.Fatalf("expected TSOpt from DUT, options we got:\n%s", hex.Dump(synAck.Options)) + } + tsecr := parsedSynOpts.TSVal + header.EncodeTSOption(currentTS(), tsecr, options) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), Options: options}) + acceptFD, _ := dut.Accept(listenFD) + defer dut.Close(acceptFD) + + sampleData := []byte("Sample Data") + sentTSVal := currentTS() + header.EncodeTSOption(sentTSVal, tsecr, options) + // 3ms here is chosen arbitrarily to make sure we have increasing timestamps + // every time we send one, it should not cause any flakiness because timestamps + // only need to be non-decreasing. + time.Sleep(3 * time.Millisecond) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), Options: options}, &testbench.Payload{Bytes: sampleData}) + + gotTCP, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, time.Second) + if err != nil { + t.Fatalf("expected an ACK but got none: %s", err) + } + + parsedOpts := header.ParseTCPOptions(gotTCP.Options) + if !parsedOpts.TS { + t.Fatalf("expected TS option in response, options we got:\n%s", hex.Dump(gotTCP.Options)) + } + if parsedOpts.TSVal < tsecr { + t.Fatalf("TSVal should be non-decreasing, but %d < %d", parsedOpts.TSVal, tsecr) + } + if parsedOpts.TSEcr != sentTSVal { + t.Fatalf("TSEcr should match our sent TSVal, %d != %d", parsedOpts.TSEcr, sentTSVal) + } + tsecr = parsedOpts.TSVal + lastAckNum := gotTCP.AckNum + + badTSVal := sentTSVal - 100 + header.EncodeTSOption(badTSVal, tsecr, options) + // 3ms here is chosen arbitrarily and this time.Sleep() should not cause flakiness + // due to the exact same reasoning discussed above. + time.Sleep(3 * time.Millisecond) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), Options: options}, &testbench.Payload{Bytes: sampleData}) + + gotTCP, err = conn.Expect(testbench.TCP{AckNum: lastAckNum, Flags: testbench.Uint8(header.TCPFlagAck)}, time.Second) + if err != nil { + t.Fatalf("expected segment with AckNum %d but got none: %s", lastAckNum, err) + } + parsedOpts = header.ParseTCPOptions(gotTCP.Options) + if !parsedOpts.TS { + t.Fatalf("expected TS option in response, options we got:\n%s", hex.Dump(gotTCP.Options)) + } + if parsedOpts.TSVal < tsecr { + t.Fatalf("TSVal should be non-decreasing, but %d < %d", parsedOpts.TSVal, tsecr) + } + if parsedOpts.TSEcr != sentTSVal { + t.Fatalf("TSEcr should match our sent TSVal, %d != %d", parsedOpts.TSEcr, sentTSVal) + } +} + +func currentTS() uint32 { + return uint32(time.Now().UnixNano() / 1e6) +} diff --git a/test/packetimpact/tests/tcp_queue_receive_in_syn_sent_test.go b/test/packetimpact/tests/tcp_queue_receive_in_syn_sent_test.go new file mode 100644 index 000000000..b640d8673 --- /dev/null +++ b/test/packetimpact/tests/tcp_queue_receive_in_syn_sent_test.go @@ -0,0 +1,87 @@ +// 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 tcp_queue_receive_in_syn_sent_test + +import ( + "bytes" + "context" + "encoding/hex" + "errors" + "flag" + "net" + "sync" + "syscall" + "testing" + "time" + + "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/test/packetimpact/testbench" +) + +func init() { + testbench.RegisterFlags(flag.CommandLine) +} + +func TestQueueReceiveInSynSent(t *testing.T) { + dut := testbench.NewDUT(t) + defer dut.TearDown() + + socket, remotePort := dut.CreateBoundSocket(unix.SOCK_STREAM, unix.IPPROTO_TCP, net.ParseIP(testbench.RemoteIPv4)) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) + defer conn.Close() + + sampleData := []byte("Sample Data") + + dut.SetNonBlocking(socket, true) + if _, err := dut.ConnectWithErrno(context.Background(), socket, conn.LocalAddr()); !errors.Is(err, syscall.EINPROGRESS) { + t.Fatalf("failed to bring DUT to SYN-SENT, got: %s, want EINPROGRESS", err) + } + if _, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagSyn)}, time.Second); err != nil { + t.Fatalf("expected a SYN from DUT, but got none: %s", err) + } + + // Issue RECEIVE call in SYN-SENT, this should be queued for process until the connection + // is established. + dut.SetNonBlocking(socket, false) + var wg sync.WaitGroup + defer wg.Wait() + wg.Add(1) + go func() { + defer wg.Done() + ctx, cancel := context.WithTimeout(context.Background(), time.Second*3) + defer cancel() + n, buff, err := dut.RecvWithErrno(ctx, socket, int32(len(sampleData)), 0) + if n == -1 { + t.Fatalf("failed to recv on DUT: %s", err) + } + if got := buff[:n]; !bytes.Equal(got, sampleData) { + t.Fatalf("received data don't match, got:\n%s, want:\n%s", hex.Dump(got), hex.Dump(sampleData)) + } + }() + + // The following sleep is used to prevent the connection from being established while the + // RPC is in flight. + time.Sleep(time.Second) + + // Bring the connection to Established. + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagSyn | header.TCPFlagAck)}) + if _, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, time.Second); err != nil { + t.Fatalf("expected an ACK from DUT, but got none: %s", err) + } + + // Send sample data to DUT. + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, &testbench.Payload{Bytes: sampleData}) +} diff --git a/test/packetimpact/tests/tcp_retransmits_test.go b/test/packetimpact/tests/tcp_retransmits_test.go index c043ad881..e51409b66 100644 --- a/test/packetimpact/tests/tcp_retransmits_test.go +++ b/test/packetimpact/tests/tcp_retransmits_test.go @@ -21,53 +21,53 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } // TestRetransmits tests retransmits occur at exponentially increasing // time intervals. func TestRetransmits(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) defer dut.Close(listenFd) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.TCP{SrcPort: &remotePort}) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) defer conn.Close() - conn.Handshake() + conn.Connect() acceptFd, _ := dut.Accept(listenFd) defer dut.Close(acceptFd) dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) sampleData := []byte("Sample Data") - samplePayload := &tb.Payload{Bytes: sampleData} + samplePayload := &testbench.Payload{Bytes: sampleData} dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&tb.TCP{}, samplePayload, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } // Give a chance for the dut to estimate RTO with RTT from the DATA-ACK. // TODO(gvisor.dev/issue/2685) Estimate RTO during handshake, after which // we can skip sending this ACK. - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) startRTO := time.Second current := startRTO first := time.Now() dut.Send(acceptFd, sampleData, 0) - seq := tb.Uint32(uint32(*conn.RemoteSeqNum())) - if _, err := conn.ExpectData(&tb.TCP{SeqNum: seq}, samplePayload, startRTO); err != nil { + seq := testbench.Uint32(uint32(*conn.RemoteSeqNum())) + if _, err := conn.ExpectData(&testbench.TCP{SeqNum: seq}, samplePayload, startRTO); err != nil { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } // Expect retransmits of the same segment. for i := 0; i < 5; i++ { start := time.Now() - if _, err := conn.ExpectData(&tb.TCP{SeqNum: seq}, samplePayload, 2*current); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{SeqNum: seq}, samplePayload, 2*current); err != nil { t.Fatalf("expected a packet with payload %v: %s loop %d", samplePayload, err, i) } if i == 0 { diff --git a/test/packetimpact/tests/tcp_send_window_sizes_piggyback_test.go b/test/packetimpact/tests/tcp_send_window_sizes_piggyback_test.go new file mode 100644 index 000000000..90ab85419 --- /dev/null +++ b/test/packetimpact/tests/tcp_send_window_sizes_piggyback_test.go @@ -0,0 +1,105 @@ +// 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 tcp_send_window_sizes_piggyback_test + +import ( + "flag" + "fmt" + "testing" + "time" + + "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/test/packetimpact/testbench" +) + +func init() { + testbench.RegisterFlags(flag.CommandLine) +} + +// TestSendWindowSizesPiggyback tests cases where segment sizes are close to +// sender window size and checks for ACK piggybacking for each of those case. +func TestSendWindowSizesPiggyback(t *testing.T) { + sampleData := []byte("Sample Data") + segmentSize := uint16(len(sampleData)) + // Advertise receive window sizes that are lesser, equal to or greater than + // enqueued segment size and check for segment transmits. The test attempts + // to enqueue a segment on the dut before acknowledging previous segment and + // lets the dut piggyback any ACKs along with the enqueued segment. + for _, tt := range []struct { + description string + windowSize uint16 + expectedPayload1 []byte + expectedPayload2 []byte + enqueue bool + }{ + // Expect the first segment to be split as it cannot be accomodated in + // the sender window. This means we need not enqueue a new segment after + // the first segment. + {"WindowSmallerThanSegment", segmentSize - 1, sampleData[:(segmentSize - 1)], sampleData[(segmentSize - 1):], false /* enqueue */}, + + {"WindowEqualToSegment", segmentSize, sampleData, sampleData, true /* enqueue */}, + + // Expect the second segment to not be split as its size is greater than + // the available sender window size. The segments should not be split + // when there is pending unacknowledged data and the segment-size is + // greater than available sender window. + {"WindowGreaterThanSegment", segmentSize + 1, sampleData, sampleData, true /* enqueue */}, + } { + t.Run(fmt.Sprintf("%s%d", tt.description, tt.windowSize), func(t *testing.T) { + dut := testbench.NewDUT(t) + defer dut.TearDown() + listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) + defer dut.Close(listenFd) + + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort, WindowSize: testbench.Uint16(tt.windowSize)}, testbench.TCP{SrcPort: &remotePort}) + defer conn.Close() + + conn.Connect() + acceptFd, _ := dut.Accept(listenFd) + defer dut.Close(acceptFd) + + dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) + + expectedTCP := testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagPsh)} + + dut.Send(acceptFd, sampleData, 0) + expectedPayload := testbench.Payload{Bytes: tt.expectedPayload1} + if _, err := conn.ExpectData(&expectedTCP, &expectedPayload, time.Second); err != nil { + t.Fatalf("expected payload was not received: %s", err) + } + + // Expect any enqueued segment to be transmitted by the dut along with + // piggybacked ACK for our data. + + if tt.enqueue { + // Enqueue a segment for the dut to transmit. + dut.Send(acceptFd, sampleData, 0) + } + + // Send ACK for the previous segment along with data for the dut to + // receive and ACK back. Sending this ACK would make room for the dut + // to transmit any enqueued segment. + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagPsh), WindowSize: testbench.Uint16(tt.windowSize)}, &testbench.Payload{Bytes: sampleData}) + + // Expect the dut to piggyback the ACK for received data along with + // the segment enqueued for transmit. + expectedPayload = testbench.Payload{Bytes: tt.expectedPayload2} + if _, err := conn.ExpectData(&expectedTCP, &expectedPayload, time.Second); err != nil { + t.Fatalf("expected payload was not received: %s", err) + } + }) + } +} diff --git a/test/packetimpact/tests/tcp_should_piggyback_test.go b/test/packetimpact/tests/tcp_should_piggyback_test.go deleted file mode 100644 index 0240dc2f9..000000000 --- a/test/packetimpact/tests/tcp_should_piggyback_test.go +++ /dev/null @@ -1,64 +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 tcp_should_piggyback_test - -import ( - "flag" - "testing" - "time" - - "golang.org/x/sys/unix" - "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" -) - -func init() { - tb.RegisterFlags(flag.CommandLine) -} - -func TestPiggyback(t *testing.T) { - dut := tb.NewDUT(t) - defer dut.TearDown() - listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) - defer dut.Close(listenFd) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort, WindowSize: tb.Uint16(12)}, tb.TCP{SrcPort: &remotePort}) - defer conn.Close() - - conn.Handshake() - acceptFd, _ := dut.Accept(listenFd) - defer dut.Close(acceptFd) - - dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) - - sampleData := []byte("Sample Data") - - dut.Send(acceptFd, sampleData, 0) - expectedTCP := tb.TCP{Flags: tb.Uint8(header.TCPFlagAck | header.TCPFlagPsh)} - expectedPayload := tb.Payload{Bytes: sampleData} - if _, err := conn.ExpectData(&expectedTCP, &expectedPayload, time.Second); err != nil { - t.Fatalf("Expected %v but didn't get one: %s", tb.Layers{&expectedTCP, &expectedPayload}, err) - } - - // Cause DUT to send us more data as soon as we ACK their first data segment because we have - // a small window. - dut.Send(acceptFd, sampleData, 0) - - // DUT should ACK our segment by piggybacking ACK to their outstanding data segment instead of - // sending a separate ACK packet. - conn.Send(expectedTCP, &expectedPayload) - if _, err := conn.ExpectData(&expectedTCP, &expectedPayload, time.Second); err != nil { - t.Fatalf("Expected %v but didn't get one: %s", tb.Layers{&expectedTCP, &expectedPayload}, err) - } -} diff --git a/test/packetimpact/tests/tcp_splitseg_mss_test.go b/test/packetimpact/tests/tcp_splitseg_mss_test.go new file mode 100644 index 000000000..9350d0988 --- /dev/null +++ b/test/packetimpact/tests/tcp_splitseg_mss_test.go @@ -0,0 +1,71 @@ +// 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 tcp_splitseg_mss_test + +import ( + "flag" + "testing" + "time" + + "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/test/packetimpact/testbench" +) + +func init() { + testbench.RegisterFlags(flag.CommandLine) +} + +// TestTCPSplitSegMSS lets the dut try to send segments larger than MSS. +// It tests if the transmitted segments are capped at MSS and are split. +func TestTCPSplitSegMSS(t *testing.T) { + dut := testbench.NewDUT(t) + defer dut.TearDown() + listenFD, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) + defer dut.Close(listenFD) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) + defer conn.Close() + + const mss = uint32(header.TCPDefaultMSS) + options := make([]byte, header.TCPOptionMSSLength) + header.EncodeMSSOption(mss, options) + conn.ConnectWithOptions(options) + + acceptFD, _ := dut.Accept(listenFD) + defer dut.Close(acceptFD) + + // Let the dut send a segment larger than MSS. + largeData := make([]byte, mss+1) + for i := 0; i < 2; i++ { + dut.Send(acceptFD, largeData, 0) + if i == 0 { + // On Linux, the initial segment goes out beyond MSS and the segment + // split occurs on retransmission. Call ExpectData to wait to + // receive the split segment. + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, &testbench.Payload{Bytes: largeData[:mss]}, time.Second); err != nil { + t.Fatalf("expected payload was not received: %s", err) + } + } else { + if _, err := conn.ExpectNextData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, &testbench.Payload{Bytes: largeData[:mss]}, time.Second); err != nil { + t.Fatalf("expected payload was not received: %s", err) + } + } + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) + if _, err := conn.ExpectNextData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, &testbench.Payload{Bytes: largeData[mss:]}, time.Second); err != nil { + t.Fatalf("expected payload was not received: %s", err) + } + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) + } +} diff --git a/test/packetimpact/tests/tcp_synrcvd_reset_test.go b/test/packetimpact/tests/tcp_synrcvd_reset_test.go new file mode 100644 index 000000000..7d5deab01 --- /dev/null +++ b/test/packetimpact/tests/tcp_synrcvd_reset_test.go @@ -0,0 +1,52 @@ +// 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 tcp_syn_reset_test + +import ( + "flag" + "testing" + "time" + + "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/tcpip/header" + "gvisor.dev/gvisor/test/packetimpact/testbench" +) + +func init() { + testbench.RegisterFlags(flag.CommandLine) +} + +// TestTCPSynRcvdReset tests transition from SYN-RCVD to CLOSED. +func TestTCPSynRcvdReset(t *testing.T) { + dut := testbench.NewDUT(t) + defer dut.TearDown() + listenFD, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) + defer dut.Close(listenFD) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) + defer conn.Close() + + // Expect dut connection to have transitioned to SYN-RCVD state. + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagSyn)}) + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagSyn | header.TCPFlagAck)}, nil, time.Second); err != nil { + t.Fatalf("expected SYN-ACK %s", err) + } + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagRst)}) + // Expect the connection to have transitioned SYN-RCVD to CLOSED. + // TODO(gvisor.dev/issue/478): Check for TCP_INFO on the dut side. + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagRst)}, nil, time.Second); err != nil { + t.Fatalf("expected a TCP RST %s", err) + } +} diff --git a/test/packetimpact/tests/tcp_synsent_reset_test.go b/test/packetimpact/tests/tcp_synsent_reset_test.go new file mode 100644 index 000000000..6898a2239 --- /dev/null +++ b/test/packetimpact/tests/tcp_synsent_reset_test.go @@ -0,0 +1,88 @@ +// 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 tcp_synsent_reset_test + +import ( + "flag" + "net" + "testing" + "time" + + "golang.org/x/sys/unix" + "gvisor.dev/gvisor/pkg/tcpip/header" + tb "gvisor.dev/gvisor/test/packetimpact/testbench" +) + +func init() { + tb.RegisterFlags(flag.CommandLine) +} + +// dutSynSentState sets up the dut connection in SYN-SENT state. +func dutSynSentState(t *testing.T) (*tb.DUT, *tb.TCPIPv4, uint16, uint16) { + dut := tb.NewDUT(t) + + clientFD, clientPort := dut.CreateBoundSocket(unix.SOCK_STREAM|unix.SOCK_NONBLOCK, unix.IPPROTO_TCP, net.ParseIP(tb.RemoteIPv4)) + port := uint16(9001) + conn := tb.NewTCPIPv4(t, tb.TCP{SrcPort: &port, DstPort: &clientPort}, tb.TCP{SrcPort: &clientPort, DstPort: &port}) + + sa := unix.SockaddrInet4{Port: int(port)} + copy(sa.Addr[:], net.IP(net.ParseIP(tb.LocalIPv4)).To4()) + // Bring the dut to SYN-SENT state with a non-blocking connect. + dut.Connect(clientFD, &sa) + if _, err := conn.ExpectData(&tb.TCP{Flags: tb.Uint8(header.TCPFlagSyn)}, nil, time.Second); err != nil { + t.Fatalf("expected SYN\n") + } + + return &dut, &conn, port, clientPort +} + +// TestTCPSynSentReset tests RFC793, p67: SYN-SENT to CLOSED transition. +func TestTCPSynSentReset(t *testing.T) { + dut, conn, _, _ := dutSynSentState(t) + defer conn.Close() + defer dut.TearDown() + conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagRst | header.TCPFlagAck)}) + // Expect the connection to have closed. + // TODO(gvisor.dev/issue/478): Check for TCP_INFO on the dut side. + conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}) + if _, err := conn.ExpectData(&tb.TCP{Flags: tb.Uint8(header.TCPFlagRst)}, nil, time.Second); err != nil { + t.Fatalf("expected a TCP RST") + } +} + +// TestTCPSynSentRcvdReset tests RFC793, p70, SYN-SENT to SYN-RCVD to CLOSED +// transitions. +func TestTCPSynSentRcvdReset(t *testing.T) { + dut, c, remotePort, clientPort := dutSynSentState(t) + defer dut.TearDown() + defer c.Close() + + conn := tb.NewTCPIPv4(t, tb.TCP{SrcPort: &remotePort, DstPort: &clientPort}, tb.TCP{SrcPort: &clientPort, DstPort: &remotePort}) + defer conn.Close() + // Initiate new SYN connection with the same port pair + // (simultaneous open case), expect the dut connection to move to + // SYN-RCVD state + conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagSyn)}) + if _, err := conn.ExpectData(&tb.TCP{Flags: tb.Uint8(header.TCPFlagSyn | header.TCPFlagAck)}, nil, time.Second); err != nil { + t.Fatalf("expected SYN-ACK %s\n", err) + } + conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagRst)}) + // Expect the connection to have transitioned SYN-RCVD to CLOSED. + // TODO(gvisor.dev/issue/478): Check for TCP_INFO on the dut side. + conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}) + if _, err := conn.ExpectData(&tb.TCP{Flags: tb.Uint8(header.TCPFlagRst)}, nil, time.Second); err != nil { + t.Fatalf("expected a TCP RST") + } +} diff --git a/test/packetimpact/tests/tcp_user_timeout_test.go b/test/packetimpact/tests/tcp_user_timeout_test.go index ce31917ee..87e45d765 100644 --- a/test/packetimpact/tests/tcp_user_timeout_test.go +++ b/test/packetimpact/tests/tcp_user_timeout_test.go @@ -22,27 +22,27 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } -func sendPayload(conn *tb.TCPIPv4, dut *tb.DUT, fd int32) error { +func sendPayload(conn *testbench.TCPIPv4, dut *testbench.DUT, fd int32) error { sampleData := make([]byte, 100) for i := range sampleData { sampleData[i] = uint8(i) } conn.Drain() dut.Send(fd, sampleData, 0) - if _, err := conn.ExpectData(&tb.TCP{Flags: tb.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, &tb.Payload{Bytes: sampleData}, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, &testbench.Payload{Bytes: sampleData}, time.Second); err != nil { return fmt.Errorf("expected data but got none: %w", err) } return nil } -func sendFIN(conn *tb.TCPIPv4, dut *tb.DUT, fd int32) error { +func sendFIN(conn *testbench.TCPIPv4, dut *testbench.DUT, fd int32) error { dut.Close(fd) return nil } @@ -59,20 +59,20 @@ func TestTCPUserTimeout(t *testing.T) { } { for _, ttf := range []struct { description string - f func(conn *tb.TCPIPv4, dut *tb.DUT, fd int32) error + f func(conn *testbench.TCPIPv4, dut *testbench.DUT, fd int32) error }{ {"AfterPayload", sendPayload}, {"AfterFIN", sendFIN}, } { t.Run(tt.description+ttf.description, func(t *testing.T) { // Create a socket, listen, TCP handshake, and accept. - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() listenFD, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) defer dut.Close(listenFD) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.TCP{SrcPort: &remotePort}) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) defer conn.Close() - conn.Handshake() + conn.Connect() acceptFD, _ := dut.Accept(listenFD) if tt.userTimeout != 0 { @@ -85,14 +85,14 @@ func TestTCPUserTimeout(t *testing.T) { time.Sleep(tt.sendDelay) conn.Drain() - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) // If TCP_USER_TIMEOUT was set and the above delay was longer than the // TCP_USER_TIMEOUT then the DUT should send a RST in response to the // testbench's packet. expectRST := tt.userTimeout != 0 && tt.sendDelay > tt.userTimeout expectTimeout := 5 * time.Second - got, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagRst)}, expectTimeout) + got, err := conn.Expect(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagRst)}, expectTimeout) if expectRST && err != nil { t.Errorf("expected RST packet within %s but got none: %s", expectTimeout, err) } diff --git a/test/packetimpact/tests/tcp_window_shrink_test.go b/test/packetimpact/tests/tcp_window_shrink_test.go index 58ec1d740..576ec1a8b 100644 --- a/test/packetimpact/tests/tcp_window_shrink_test.go +++ b/test/packetimpact/tests/tcp_window_shrink_test.go @@ -21,53 +21,53 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } func TestWindowShrink(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) defer dut.Close(listenFd) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.TCP{SrcPort: &remotePort}) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) defer conn.Close() - conn.Handshake() + conn.Connect() acceptFd, _ := dut.Accept(listenFd) defer dut.Close(acceptFd) dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) sampleData := []byte("Sample Data") - samplePayload := &tb.Payload{Bytes: sampleData} + samplePayload := &testbench.Payload{Bytes: sampleData} dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&tb.TCP{}, samplePayload, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) dut.Send(acceptFd, sampleData, 0) dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&tb.TCP{}, samplePayload, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } - if _, err := conn.ExpectData(&tb.TCP{}, samplePayload, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } // We close our receiving window here - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), WindowSize: tb.Uint16(0)}) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(0)}) dut.Send(acceptFd, []byte("Sample Data"), 0) // Note: There is another kind of zero-window probing which Windows uses (by sending one // new byte at `RemoteSeqNum`), if netstack wants to go that way, we may want to change // the following lines. expectedRemoteSeqNum := *conn.RemoteSeqNum() - 1 - if _, err := conn.ExpectData(&tb.TCP{SeqNum: tb.Uint32(uint32(expectedRemoteSeqNum))}, nil, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{SeqNum: testbench.Uint32(uint32(expectedRemoteSeqNum))}, nil, time.Second); err != nil { t.Fatalf("expected a packet with sequence number %v: %s", expectedRemoteSeqNum, err) } } diff --git a/test/packetimpact/tests/tcp_zero_window_probe_retransmit_test.go b/test/packetimpact/tests/tcp_zero_window_probe_retransmit_test.go index dd43a24db..54cee138f 100644 --- a/test/packetimpact/tests/tcp_zero_window_probe_retransmit_test.go +++ b/test/packetimpact/tests/tcp_zero_window_probe_retransmit_test.go @@ -21,39 +21,39 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } // TestZeroWindowProbeRetransmit tests retransmits of zero window probes // to be sent at exponentially inreasing time intervals. func TestZeroWindowProbeRetransmit(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) defer dut.Close(listenFd) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.TCP{SrcPort: &remotePort}) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) defer conn.Close() - conn.Handshake() + conn.Connect() acceptFd, _ := dut.Accept(listenFd) defer dut.Close(acceptFd) dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) sampleData := []byte("Sample Data") - samplePayload := &tb.Payload{Bytes: sampleData} + samplePayload := &testbench.Payload{Bytes: sampleData} // Send and receive sample data to the dut. dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&tb.TCP{}, samplePayload, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, samplePayload) - if _, err := conn.ExpectData(&tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}, nil, time.Second); err != nil { + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, samplePayload) + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, nil, time.Second); err != nil { t.Fatalf("expected a packet with sequence number %s", err) } @@ -63,9 +63,9 @@ func TestZeroWindowProbeRetransmit(t *testing.T) { // of the recorded first zero probe transmission duration. // // Advertize zero receive window again. - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), WindowSize: tb.Uint16(0)}) - probeSeq := tb.Uint32(uint32(*conn.RemoteSeqNum() - 1)) - ackProbe := tb.Uint32(uint32(*conn.RemoteSeqNum())) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(0)}) + probeSeq := testbench.Uint32(uint32(*conn.RemoteSeqNum() - 1)) + ackProbe := testbench.Uint32(uint32(*conn.RemoteSeqNum())) startProbeDuration := time.Second current := startProbeDuration @@ -79,7 +79,7 @@ func TestZeroWindowProbeRetransmit(t *testing.T) { // Expect zero-window probe with a timeout which is a function of the typical // first retransmission time. The retransmission times is supposed to // exponentially increase. - if _, err := conn.ExpectData(&tb.TCP{SeqNum: probeSeq}, nil, 2*current); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{SeqNum: probeSeq}, nil, 2*current); err != nil { t.Fatalf("expected a probe with sequence number %v: loop %d", probeSeq, i) } if i == 0 { @@ -92,13 +92,14 @@ func TestZeroWindowProbeRetransmit(t *testing.T) { t.Fatalf("zero probe came sooner interval %d probe %d\n", p, i) } // Acknowledge the zero-window probes from the dut. - conn.Send(tb.TCP{AckNum: ackProbe, Flags: tb.Uint8(header.TCPFlagAck), WindowSize: tb.Uint16(0)}) + conn.Send(testbench.TCP{AckNum: ackProbe, Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(0)}) current *= 2 } // Advertize non-zero window. - conn.Send(tb.TCP{AckNum: ackProbe, Flags: tb.Uint8(header.TCPFlagAck)}) + conn.Send(testbench.TCP{AckNum: ackProbe, Flags: testbench.Uint8(header.TCPFlagAck)}) // Expect the dut to recover and transmit data. - if _, err := conn.ExpectData(&tb.TCP{SeqNum: ackProbe}, samplePayload, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench. + TCP{SeqNum: ackProbe}, samplePayload, time.Second); err != nil { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } } diff --git a/test/packetimpact/tests/tcp_zero_window_probe_test.go b/test/packetimpact/tests/tcp_zero_window_probe_test.go index 6c453505d..c9b3b7af2 100644 --- a/test/packetimpact/tests/tcp_zero_window_probe_test.go +++ b/test/packetimpact/tests/tcp_zero_window_probe_test.go @@ -21,41 +21,41 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } // TestZeroWindowProbe tests few cases of zero window probing over the // same connection. func TestZeroWindowProbe(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) defer dut.Close(listenFd) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.TCP{SrcPort: &remotePort}) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) defer conn.Close() - conn.Handshake() + conn.Connect() acceptFd, _ := dut.Accept(listenFd) defer dut.Close(acceptFd) dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) sampleData := []byte("Sample Data") - samplePayload := &tb.Payload{Bytes: sampleData} + samplePayload := &testbench.Payload{Bytes: sampleData} start := time.Now() // Send and receive sample data to the dut. dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&tb.TCP{}, samplePayload, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } sendTime := time.Now().Sub(start) - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, samplePayload) - if _, err := conn.ExpectData(&tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}, nil, time.Second); err != nil { + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, samplePayload) + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, nil, time.Second); err != nil { t.Fatalf("expected a packet with sequence number %s", err) } @@ -63,16 +63,16 @@ func TestZeroWindowProbe(t *testing.T) { // probe to be sent. // // Advertize zero window to the dut. - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), WindowSize: tb.Uint16(0)}) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(0)}) // Expected sequence number of the zero window probe. - probeSeq := tb.Uint32(uint32(*conn.RemoteSeqNum() - 1)) + probeSeq := testbench.Uint32(uint32(*conn.RemoteSeqNum() - 1)) // Expected ack number of the ACK for the probe. - ackProbe := tb.Uint32(uint32(*conn.RemoteSeqNum())) + ackProbe := testbench.Uint32(uint32(*conn.RemoteSeqNum())) // Expect there are no zero-window probes sent until there is data to be sent out // from the dut. - if _, err := conn.ExpectData(&tb.TCP{SeqNum: probeSeq}, nil, 2*time.Second); err == nil { + if _, err := conn.ExpectData(&testbench.TCP{SeqNum: probeSeq}, nil, 2*time.Second); err == nil { t.Fatalf("unexpected a packet with sequence number %v: %s", probeSeq, err) } @@ -80,7 +80,7 @@ func TestZeroWindowProbe(t *testing.T) { // Ask the dut to send out data. dut.Send(acceptFd, sampleData, 0) // Expect zero-window probe from the dut. - if _, err := conn.ExpectData(&tb.TCP{SeqNum: probeSeq}, nil, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{SeqNum: probeSeq}, nil, time.Second); err != nil { t.Fatalf("expected a packet with sequence number %v: %s", probeSeq, err) } // Expect the probe to be sent after some time. Compare against the previous @@ -94,9 +94,9 @@ func TestZeroWindowProbe(t *testing.T) { // and sends out the sample payload after the send window opens. // // Advertize non-zero window to the dut and ack the zero window probe. - conn.Send(tb.TCP{AckNum: ackProbe, Flags: tb.Uint8(header.TCPFlagAck)}) + conn.Send(testbench.TCP{AckNum: ackProbe, Flags: testbench.Uint8(header.TCPFlagAck)}) // Expect the dut to recover and transmit data. - if _, err := conn.ExpectData(&tb.TCP{SeqNum: ackProbe}, samplePayload, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{SeqNum: ackProbe}, samplePayload, time.Second); err != nil { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } @@ -104,9 +104,9 @@ func TestZeroWindowProbe(t *testing.T) { // Check if the dut responds as we do for a similar probe sent to it. // Basically with sequence number to one byte behind the unacknowledged // sequence number. - p := tb.Uint32(uint32(*conn.LocalSeqNum())) - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), SeqNum: tb.Uint32(uint32(*conn.LocalSeqNum() - 1))}) - if _, err := conn.ExpectData(&tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), AckNum: p}, nil, time.Second); err != nil { + p := testbench.Uint32(uint32(*conn.LocalSeqNum())) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), SeqNum: testbench.Uint32(uint32(*conn.LocalSeqNum() - 1))}) + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), AckNum: p}, nil, time.Second); err != nil { t.Fatalf("expected a packet with ack number: %d: %s", p, err) } } diff --git a/test/packetimpact/tests/tcp_zero_window_probe_usertimeout_test.go b/test/packetimpact/tests/tcp_zero_window_probe_usertimeout_test.go index 193427fb9..749281d9d 100644 --- a/test/packetimpact/tests/tcp_zero_window_probe_usertimeout_test.go +++ b/test/packetimpact/tests/tcp_zero_window_probe_usertimeout_test.go @@ -21,39 +21,39 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } // TestZeroWindowProbeUserTimeout sanity tests user timeout when we are // retransmitting zero window probes. func TestZeroWindowProbeUserTimeout(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) defer dut.Close(listenFd) - conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.TCP{SrcPort: &remotePort}) + conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) defer conn.Close() - conn.Handshake() + conn.Connect() acceptFd, _ := dut.Accept(listenFd) defer dut.Close(acceptFd) dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) sampleData := []byte("Sample Data") - samplePayload := &tb.Payload{Bytes: sampleData} + samplePayload := &testbench.Payload{Bytes: sampleData} // Send and receive sample data to the dut. dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&tb.TCP{}, samplePayload, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { t.Fatalf("expected a packet with payload %v: %s", samplePayload, err) } - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, samplePayload) - if _, err := conn.ExpectData(&tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}, nil, time.Second); err != nil { + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, samplePayload) + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, nil, time.Second); err != nil { t.Fatalf("expected a packet with sequence number %s", err) } @@ -61,15 +61,15 @@ func TestZeroWindowProbeUserTimeout(t *testing.T) { // probe to be sent. // // Advertize zero window to the dut. - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), WindowSize: tb.Uint16(0)}) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(0)}) // Expected sequence number of the zero window probe. - probeSeq := tb.Uint32(uint32(*conn.RemoteSeqNum() - 1)) + probeSeq := testbench.Uint32(uint32(*conn.RemoteSeqNum() - 1)) start := time.Now() // Ask the dut to send out data. dut.Send(acceptFd, sampleData, 0) // Expect zero-window probe from the dut. - if _, err := conn.ExpectData(&tb.TCP{SeqNum: probeSeq}, nil, time.Second); err != nil { + if _, err := conn.ExpectData(&testbench.TCP{SeqNum: probeSeq}, nil, time.Second); err != nil { t.Fatalf("expected a packet with sequence number %v: %s", probeSeq, err) } // Record the duration for first probe, the dut sends the zero window probe after @@ -82,7 +82,7 @@ func TestZeroWindowProbeUserTimeout(t *testing.T) { // Reduce the retransmit timeout. dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_USER_TIMEOUT, int32(startProbeDuration.Milliseconds())) // Advertize zero window again. - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), WindowSize: tb.Uint16(0)}) + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(0)}) // Ask the dut to send out data that would trigger zero window probe retransmissions. dut.Send(acceptFd, sampleData, 0) @@ -91,8 +91,8 @@ func TestZeroWindowProbeUserTimeout(t *testing.T) { // Expect the connection to have timed out and closed which would cause the dut // to reply with a RST to the ACK we send. - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}) - if _, err := conn.ExpectData(&tb.TCP{Flags: tb.Uint8(header.TCPFlagRst)}, nil, time.Second); err != nil { + conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) + if _, err := conn.ExpectData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagRst)}, nil, time.Second); err != nil { t.Fatalf("expected a TCP RST") } } diff --git a/test/packetimpact/tests/test_runner.sh b/test/packetimpact/tests/test_runner.sh deleted file mode 100755 index 706441cce..000000000 --- a/test/packetimpact/tests/test_runner.sh +++ /dev/null @@ -1,325 +0,0 @@ -#!/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. diff --git a/test/packetimpact/tests/udp_icmp_error_propagation_test.go b/test/packetimpact/tests/udp_icmp_error_propagation_test.go index ca4df2ab0..aedabf9de 100644 --- a/test/packetimpact/tests/udp_icmp_error_propagation_test.go +++ b/test/packetimpact/tests/udp_icmp_error_propagation_test.go @@ -26,11 +26,11 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } type connectionMode bool @@ -59,12 +59,12 @@ func (e icmpError) String() string { return "Unknown ICMP error" } -func (e icmpError) ToICMPv4() *tb.ICMPv4 { +func (e icmpError) ToICMPv4() *testbench.ICMPv4 { switch e { case portUnreachable: - return &tb.ICMPv4{Type: tb.ICMPv4Type(header.ICMPv4DstUnreachable), Code: tb.Uint8(header.ICMPv4PortUnreachable)} + return &testbench.ICMPv4{Type: testbench.ICMPv4Type(header.ICMPv4DstUnreachable), Code: testbench.Uint8(header.ICMPv4PortUnreachable)} case timeToLiveExceeded: - return &tb.ICMPv4{Type: tb.ICMPv4Type(header.ICMPv4TimeExceeded), Code: tb.Uint8(header.ICMPv4TTLExceeded)} + return &testbench.ICMPv4{Type: testbench.ICMPv4Type(header.ICMPv4TimeExceeded), Code: testbench.Uint8(header.ICMPv4TTLExceeded)} } return nil } @@ -76,8 +76,8 @@ type errorDetection struct { } type testData struct { - dut *tb.DUT - conn *tb.UDPIPv4 + dut *testbench.DUT + conn *testbench.UDPIPv4 remoteFD int32 remotePort uint16 cleanFD int32 @@ -95,9 +95,9 @@ func wantErrno(c connectionMode, icmpErr icmpError) syscall.Errno { } // sendICMPError sends an ICMP error message in response to a UDP datagram. -func sendICMPError(conn *tb.UDPIPv4, icmpErr icmpError, udp *tb.UDP) error { +func sendICMPError(conn *testbench.UDPIPv4, icmpErr icmpError, udp *testbench.UDP) error { if icmpErr == timeToLiveExceeded { - ip, ok := udp.Prev().(*tb.IPv4) + ip, ok := udp.Prev().(*testbench.IPv4) if !ok { return fmt.Errorf("expected %s to be IPv4", udp.Prev()) } @@ -123,10 +123,10 @@ func sendICMPError(conn *tb.UDPIPv4, icmpErr icmpError, udp *tb.UDP) error { // first recv should succeed immediately. func testRecv(ctx context.Context, d testData) error { // Check that receiving on the clean socket works. - d.conn.Send(tb.UDP{DstPort: &d.cleanPort}) + d.conn.Send(testbench.UDP{DstPort: &d.cleanPort}) d.dut.Recv(d.cleanFD, 100, 0) - d.conn.Send(tb.UDP{}) + d.conn.Send(testbench.UDP{}) if d.wantErrno != syscall.Errno(0) { ctx, cancel := context.WithTimeout(ctx, time.Second) @@ -151,7 +151,7 @@ func testRecv(ctx context.Context, d testData) error { func testSendTo(ctx context.Context, d testData) error { // Check that sending on the clean socket works. d.dut.SendTo(d.cleanFD, nil, 0, d.conn.LocalAddr()) - if _, err := d.conn.Expect(tb.UDP{SrcPort: &d.cleanPort}, time.Second); err != nil { + if _, err := d.conn.Expect(testbench.UDP{SrcPort: &d.cleanPort}, time.Second); err != nil { return fmt.Errorf("did not receive UDP packet from clean socket on DUT: %s", err) } @@ -169,7 +169,7 @@ func testSendTo(ctx context.Context, d testData) error { } d.dut.SendTo(d.remoteFD, nil, 0, d.conn.LocalAddr()) - if _, err := d.conn.Expect(tb.UDP{}, time.Second); err != nil { + if _, err := d.conn.Expect(testbench.UDP{}, time.Second); err != nil { return fmt.Errorf("did not receive UDP packet as expected: %s", err) } return nil @@ -187,7 +187,7 @@ func testSockOpt(_ context.Context, d testData) error { // Check that after clearing socket error, sending doesn't fail. d.dut.SendTo(d.remoteFD, nil, 0, d.conn.LocalAddr()) - if _, err := d.conn.Expect(tb.UDP{}, time.Second); err != nil { + if _, err := d.conn.Expect(testbench.UDP{}, time.Second); err != nil { return fmt.Errorf("did not receive UDP packet as expected: %s", err) } return nil @@ -223,7 +223,7 @@ func TestUDPICMPErrorPropagation(t *testing.T) { errorDetection{"SockOpt", false, testSockOpt}, } { t.Run(fmt.Sprintf("%s/%s/%s", connect, icmpErr, errDetect.name), func(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() remoteFD, remotePort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) @@ -234,7 +234,7 @@ func TestUDPICMPErrorPropagation(t *testing.T) { cleanFD, cleanPort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) defer dut.Close(cleanFD) - conn := tb.NewUDPIPv4(t, tb.UDP{DstPort: &remotePort}, tb.UDP{SrcPort: &remotePort}) + conn := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) defer conn.Close() if connect { @@ -243,7 +243,7 @@ func TestUDPICMPErrorPropagation(t *testing.T) { } dut.SendTo(remoteFD, nil, 0, conn.LocalAddr()) - udp, err := conn.Expect(tb.UDP{}, time.Second) + udp, err := conn.Expect(testbench.UDP{}, time.Second) if err != nil { t.Fatalf("did not receive message from DUT: %s", err) } @@ -258,7 +258,7 @@ func TestUDPICMPErrorPropagation(t *testing.T) { // involved in the generation of the ICMP error. As such, // interactions between it and the the DUT should be independent of // the ICMP error at least at the port level. - connClean := tb.NewUDPIPv4(t, tb.UDP{DstPort: &remotePort}, tb.UDP{SrcPort: &remotePort}) + connClean := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) defer connClean.Close() errDetectConn = &connClean @@ -281,7 +281,7 @@ func TestICMPErrorDuringUDPRecv(t *testing.T) { wantErrno := wantErrno(connect, icmpErr) t.Run(fmt.Sprintf("%s/%s", connect, icmpErr), func(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() remoteFD, remotePort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) @@ -292,7 +292,7 @@ func TestICMPErrorDuringUDPRecv(t *testing.T) { cleanFD, cleanPort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) defer dut.Close(cleanFD) - conn := tb.NewUDPIPv4(t, tb.UDP{DstPort: &remotePort}, tb.UDP{SrcPort: &remotePort}) + conn := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) defer conn.Close() if connect { @@ -301,7 +301,7 @@ func TestICMPErrorDuringUDPRecv(t *testing.T) { } dut.SendTo(remoteFD, nil, 0, conn.LocalAddr()) - udp, err := conn.Expect(tb.UDP{}, time.Second) + udp, err := conn.Expect(testbench.UDP{}, time.Second) if err != nil { t.Fatalf("did not receive message from DUT: %s", err) } @@ -355,8 +355,8 @@ func TestICMPErrorDuringUDPRecv(t *testing.T) { t.Fatal(err) } - conn.Send(tb.UDP{DstPort: &cleanPort}) - conn.Send(tb.UDP{}) + conn.Send(testbench.UDP{DstPort: &cleanPort}) + conn.Send(testbench.UDP{}) wg.Wait() }) } diff --git a/test/packetimpact/tests/udp_recv_multicast_test.go b/test/packetimpact/tests/udp_recv_multicast_test.go index 0bae18ba3..d51a34145 100644 --- a/test/packetimpact/tests/udp_recv_multicast_test.go +++ b/test/packetimpact/tests/udp_recv_multicast_test.go @@ -21,22 +21,22 @@ import ( "golang.org/x/sys/unix" "gvisor.dev/gvisor/pkg/tcpip" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } func TestUDPRecvMulticast(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() boundFD, remotePort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) defer dut.Close(boundFD) - conn := tb.NewUDPIPv4(t, tb.UDP{DstPort: &remotePort}, tb.UDP{SrcPort: &remotePort}) + conn := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) defer conn.Close() - frame := conn.CreateFrame(&tb.UDP{}, &tb.Payload{Bytes: []byte("hello world")}) - frame[1].(*tb.IPv4).DstAddr = tb.Address(tcpip.Address(net.ParseIP("224.0.0.1").To4())) + frame := conn.CreateFrame(&testbench.UDP{}, &testbench.Payload{Bytes: []byte("hello world")}) + frame[1].(*testbench.IPv4).DstAddr = testbench.Address(tcpip.Address(net.ParseIP("224.0.0.1").To4())) conn.SendFrame(frame) dut.Recv(boundFD, 100, 0) } diff --git a/test/packetimpact/tests/udp_send_recv_dgram_test.go b/test/packetimpact/tests/udp_send_recv_dgram_test.go index 350875a6f..bf64803e2 100644 --- a/test/packetimpact/tests/udp_send_recv_dgram_test.go +++ b/test/packetimpact/tests/udp_send_recv_dgram_test.go @@ -22,11 +22,11 @@ import ( "time" "golang.org/x/sys/unix" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" + "gvisor.dev/gvisor/test/packetimpact/testbench" ) func init() { - tb.RegisterFlags(flag.CommandLine) + testbench.RegisterFlags(flag.CommandLine) } func generateRandomPayload(t *testing.T, n int) string { @@ -39,11 +39,11 @@ func generateRandomPayload(t *testing.T, n int) string { } func TestUDPRecv(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() boundFD, remotePort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) defer dut.Close(boundFD) - conn := tb.NewUDPIPv4(t, tb.UDP{DstPort: &remotePort}, tb.UDP{SrcPort: &remotePort}) + conn := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) defer conn.Close() testCases := []struct { @@ -59,7 +59,7 @@ func TestUDPRecv(t *testing.T) { } for _, tc := range testCases { t.Run(tc.name, func(t *testing.T) { - frame := conn.CreateFrame(&tb.UDP{}, &tb.Payload{Bytes: []byte(tc.payload)}) + frame := conn.CreateFrame(&testbench.UDP{}, &testbench.Payload{Bytes: []byte(tc.payload)}) conn.SendFrame(frame) if got, want := string(dut.Recv(boundFD, int32(len(tc.payload)), 0)), tc.payload; got != want { t.Fatalf("received payload does not match sent payload got: %s, want: %s", got, want) @@ -69,11 +69,11 @@ func TestUDPRecv(t *testing.T) { } func TestUDPSend(t *testing.T) { - dut := tb.NewDUT(t) + dut := testbench.NewDUT(t) defer dut.TearDown() boundFD, remotePort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) defer dut.Close(boundFD) - conn := tb.NewUDPIPv4(t, tb.UDP{DstPort: &remotePort}, tb.UDP{SrcPort: &remotePort}) + conn := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) defer conn.Close() testCases := []struct { @@ -93,7 +93,7 @@ func TestUDPSend(t *testing.T) { if got, want := int(dut.SendTo(boundFD, []byte(tc.payload), 0, conn.LocalAddr())), len(tc.payload); got != want { t.Fatalf("short write got: %d, want: %d", got, want) } - if _, err := conn.ExpectData(tb.UDP{SrcPort: &remotePort}, tb.Payload{Bytes: []byte(tc.payload)}, 1*time.Second); err != nil { + if _, err := conn.ExpectData(testbench.UDP{SrcPort: &remotePort}, testbench.Payload{Bytes: []byte(tc.payload)}, 1*time.Second); err != nil { t.Fatal(err) } }) |