diff options
Diffstat (limited to 'test/packetimpact/tests')
25 files changed, 0 insertions, 2853 deletions
diff --git a/test/packetimpact/tests/BUILD b/test/packetimpact/tests/BUILD deleted file mode 100644 index 85749c559..000000000 --- a/test/packetimpact/tests/BUILD +++ /dev/null @@ -1,266 +0,0 @@ -load("//test/packetimpact/runner:defs.bzl", "packetimpact_go_test") - -package( - default_visibility = ["//test/packetimpact:__subpackages__"], - licenses = ["notice"], -) - -packetimpact_go_test( - name = "fin_wait2_timeout", - srcs = ["fin_wait2_timeout_test.go"], - deps = [ - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -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. - expect_netstack_failure = True, - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "udp_icmp_error_propagation", - srcs = ["udp_icmp_error_propagation_test.go"], - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "tcp_reordering", - srcs = ["tcp_reordering_test.go"], - # TODO(b/139368047): 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_window_shrink", - srcs = ["tcp_window_shrink_test.go"], - deps = [ - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "tcp_zero_window_probe", - srcs = ["tcp_zero_window_probe_test.go"], - deps = [ - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "tcp_zero_window_probe_retransmit", - srcs = ["tcp_zero_window_probe_retransmit_test.go"], - deps = [ - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "tcp_zero_window_probe_usertimeout", - srcs = ["tcp_zero_window_probe_usertimeout_test.go"], - deps = [ - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "tcp_retransmits", - srcs = ["tcp_retransmits_test.go"], - deps = [ - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "tcp_outside_the_window", - srcs = ["tcp_outside_the_window_test.go"], - deps = [ - "//pkg/tcpip/header", - "//pkg/tcpip/seqnum", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "tcp_noaccept_close_rst", - srcs = ["tcp_noaccept_close_rst_test.go"], - deps = [ - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "tcp_send_window_sizes_piggyback", - srcs = ["tcp_send_window_sizes_piggyback_test.go"], - deps = [ - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "tcp_close_wait_ack", - srcs = ["tcp_close_wait_ack_test.go"], - deps = [ - "//pkg/tcpip/header", - "//pkg/tcpip/seqnum", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -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 = [ - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "tcp_queue_receive_in_syn_sent", - srcs = ["tcp_queue_receive_in_syn_sent_test.go"], - 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_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 = "tcp_handshake_window_size", - srcs = ["tcp_handshake_window_size_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. - expect_netstack_failure = True, - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "ipv6_unknown_options_action", - srcs = ["ipv6_unknown_options_action_test.go"], - # TODO(b/159928940): Fix netstack then remove the line below. - expect_netstack_failure = True, - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/header", - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -packetimpact_go_test( - name = "udp_send_recv_dgram", - srcs = ["udp_send_recv_dgram_test.go"], - deps = [ - "//test/packetimpact/testbench", - "@org_golang_x_sys//unix:go_default_library", - ], -) diff --git a/test/packetimpact/tests/fin_wait2_timeout_test.go b/test/packetimpact/tests/fin_wait2_timeout_test.go deleted file mode 100644 index 407565078..000000000 --- a/test/packetimpact/tests/fin_wait2_timeout_test.go +++ /dev/null @@ -1,75 +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 fin_wait2_timeout_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) -} - -func TestFinWait2Timeout(t *testing.T) { - for _, tt := range []struct { - description string - linger2 bool - }{ - {"WithLinger2", true}, - {"WithoutLinger2", false}, - } { - t.Run(tt.description, 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}, testbench.TCP{SrcPort: &remotePort}) - defer conn.Close() - conn.Connect() - - acceptFd, _ := dut.Accept(listenFd) - if tt.linger2 { - tv := unix.Timeval{Sec: 1, Usec: 0} - dut.SetSockOptTimeval(acceptFd, unix.SOL_TCP, unix.TCP_LINGER2, &tv) - } - dut.Close(acceptFd) - - 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(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) - - time.Sleep(5 * time.Second) - conn.Drain() - - conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) - if tt.linger2 { - 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(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 deleted file mode 100644 index 4d1d9a7f5..000000000 --- a/test/packetimpact/tests/icmpv6_param_problem_test.go +++ /dev/null @@ -1,78 +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 icmpv6_param_problem_test - -import ( - "encoding/binary" - "flag" - "testing" - "time" - - "gvisor.dev/gvisor/pkg/tcpip/header" - "gvisor.dev/gvisor/test/packetimpact/testbench" -) - -func init() { - 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 := testbench.NewDUT(t) - defer dut.TearDown() - conn := testbench.NewIPv6Conn(t, testbench.IPv6{}, testbench.IPv6{}) - defer conn.Close() - ipv6 := testbench.IPv6{ - // 254 is reserved and used for experimentation and testing. This should - // cause an error. - NextHeader: testbench.Uint8(254), - } - icmpv6 := testbench.ICMPv6{ - Type: testbench.ICMPv6Type(header.ICMPv6EchoRequest), - NDPPayload: []byte("hello world"), - } - - toSend := (*testbench.Connection)(&conn).CreateFrame(testbench.Layers{&ipv6}, &icmpv6) - (*testbench.Connection)(&conn).SendFrame(toSend) - - // Build the expected ICMPv6 payload, which includes an index to the - // problematic byte and also the problematic packet as described in - // https://tools.ietf.org/html/rfc4443#page-12 . - ipv6Sent := toSend[1:] - expectedPayload, err := ipv6Sent.ToBytes() - if err != nil { - t.Fatalf("can't convert %s to bytes: %s", ipv6Sent, err) - } - - // The problematic field is the NextHeader. - b := make([]byte, 4) - binary.BigEndian.PutUint32(b, header.IPv6NextHeaderOffset) - expectedPayload = append(b, expectedPayload...) - expectedICMPv6 := testbench.ICMPv6{ - Type: testbench.ICMPv6Type(header.ICMPv6ParamProblem), - NDPPayload: expectedPayload, - } - - paramProblem := testbench.Layers{ - &testbench.Ether{}, - &testbench.IPv6{}, - &expectedICMPv6, - } - timeout := time.Second - if _, err := conn.ExpectFrame(paramProblem, timeout); err != nil { - t.Errorf("expected %s within %s but got none: %s", paramProblem, timeout, err) - } -} diff --git a/test/packetimpact/tests/ipv4_id_uniqueness_test.go b/test/packetimpact/tests/ipv4_id_uniqueness_test.go deleted file mode 100644 index 70f6df5e0..000000000 --- a/test/packetimpact/tests/ipv4_id_uniqueness_test.go +++ /dev/null @@ -1,122 +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 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) { - for _, tc := range []struct { - name string - payload []byte - }{ - {"SmallPayload", []byte("sample data")}, - // 512 bytes is chosen because sending more than this in a single segment - // causes the retransmission to send less than the original amount. - {"512BytePayload", testbench.GenerateRandomPayload(t, 512)}, - } { - t.Run(tc.name, 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}, 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) - } - - samplePayload := &testbench.Payload{Bytes: tc.payload} - - dut.Send(remoteFD, tc.payload, 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)}) - - dut.Send(remoteFD, tc.payload, 0) - expectTCP := &testbench.TCP{SeqNum: testbench.Uint32(uint32(*conn.RemoteSeqNum()))} - 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/ipv6_unknown_options_action_test.go b/test/packetimpact/tests/ipv6_unknown_options_action_test.go deleted file mode 100644 index d301d8829..000000000 --- a/test/packetimpact/tests/ipv6_unknown_options_action_test.go +++ /dev/null @@ -1,187 +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 ipv6_unknown_options_action_test - -import ( - "encoding/binary" - "flag" - "net" - "testing" - "time" - - "gvisor.dev/gvisor/pkg/tcpip" - "gvisor.dev/gvisor/pkg/tcpip/header" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" -) - -func init() { - tb.RegisterFlags(flag.CommandLine) -} - -func mkHopByHopOptionsExtHdr(optType byte) tb.Layer { - return &tb.IPv6HopByHopOptionsExtHdr{ - Options: []byte{optType, 0x04, 0x00, 0x00, 0x00, 0x00}, - } -} - -func mkDestinationOptionsExtHdr(optType byte) tb.Layer { - return &tb.IPv6DestinationOptionsExtHdr{ - Options: []byte{optType, 0x04, 0x00, 0x00, 0x00, 0x00}, - } -} - -func optionTypeFromAction(action header.IPv6OptionUnknownAction) byte { - return byte(action << 6) -} - -func TestIPv6UnknownOptionAction(t *testing.T) { - for _, tt := range []struct { - description string - mkExtHdr func(optType byte) tb.Layer - action header.IPv6OptionUnknownAction - multicastDst bool - wantICMPv6 bool - }{ - { - description: "0b00/hbh", - mkExtHdr: mkHopByHopOptionsExtHdr, - action: header.IPv6OptionUnknownActionSkip, - multicastDst: false, - wantICMPv6: false, - }, - { - description: "0b01/hbh", - mkExtHdr: mkHopByHopOptionsExtHdr, - action: header.IPv6OptionUnknownActionDiscard, - multicastDst: false, - wantICMPv6: false, - }, - { - description: "0b10/hbh/unicast", - mkExtHdr: mkHopByHopOptionsExtHdr, - action: header.IPv6OptionUnknownActionDiscardSendICMP, - multicastDst: false, - wantICMPv6: true, - }, - { - description: "0b10/hbh/multicast", - mkExtHdr: mkHopByHopOptionsExtHdr, - action: header.IPv6OptionUnknownActionDiscardSendICMP, - multicastDst: true, - wantICMPv6: true, - }, - { - description: "0b11/hbh/unicast", - mkExtHdr: mkHopByHopOptionsExtHdr, - action: header.IPv6OptionUnknownActionDiscardSendICMPNoMulticastDest, - multicastDst: false, - wantICMPv6: true, - }, - { - description: "0b11/hbh/multicast", - mkExtHdr: mkHopByHopOptionsExtHdr, - action: header.IPv6OptionUnknownActionDiscardSendICMPNoMulticastDest, - multicastDst: true, - wantICMPv6: false, - }, - { - description: "0b00/destination", - mkExtHdr: mkDestinationOptionsExtHdr, - action: header.IPv6OptionUnknownActionSkip, - multicastDst: false, - wantICMPv6: false, - }, - { - description: "0b01/destination", - mkExtHdr: mkDestinationOptionsExtHdr, - action: header.IPv6OptionUnknownActionDiscard, - multicastDst: false, - wantICMPv6: false, - }, - { - description: "0b10/destination/unicast", - mkExtHdr: mkDestinationOptionsExtHdr, - action: header.IPv6OptionUnknownActionDiscardSendICMP, - multicastDst: false, - wantICMPv6: true, - }, - { - description: "0b10/destination/multicast", - mkExtHdr: mkDestinationOptionsExtHdr, - action: header.IPv6OptionUnknownActionDiscardSendICMP, - multicastDst: true, - wantICMPv6: true, - }, - { - description: "0b11/destination/unicast", - mkExtHdr: mkDestinationOptionsExtHdr, - action: header.IPv6OptionUnknownActionDiscardSendICMPNoMulticastDest, - multicastDst: false, - wantICMPv6: true, - }, - { - description: "0b11/destination/multicast", - mkExtHdr: mkDestinationOptionsExtHdr, - action: header.IPv6OptionUnknownActionDiscardSendICMPNoMulticastDest, - multicastDst: true, - wantICMPv6: false, - }, - } { - t.Run(tt.description, func(t *testing.T) { - dut := tb.NewDUT(t) - defer dut.TearDown() - ipv6Conn := tb.NewIPv6Conn(t, tb.IPv6{}, tb.IPv6{}) - conn := (*tb.Connection)(&ipv6Conn) - defer ipv6Conn.Close() - - outgoingOverride := tb.Layers{} - if tt.multicastDst { - outgoingOverride = tb.Layers{&tb.IPv6{ - DstAddr: tb.Address(tcpip.Address(net.ParseIP("ff02::1"))), - }} - } - - outgoing := conn.CreateFrame(outgoingOverride, tt.mkExtHdr(optionTypeFromAction(tt.action))) - conn.SendFrame(outgoing) - ipv6Sent := outgoing[1:] - invokingPacket, err := ipv6Sent.ToBytes() - if err != nil { - t.Fatalf("failed to serialize the outgoing packet: %s", err) - } - icmpv6Payload := make([]byte, 4) - // The pointer in the ICMPv6 parameter problem message should point to - // the option type of the unknown option. In our test case, it is the - // first option in the extension header whose option type is 2 bytes - // after the IPv6 header (after NextHeader and ExtHdrLen). - binary.BigEndian.PutUint32(icmpv6Payload, header.IPv6MinimumSize+2) - icmpv6Payload = append(icmpv6Payload, invokingPacket...) - gotICMPv6, err := ipv6Conn.ExpectFrame(tb.Layers{ - &tb.Ether{}, - &tb.IPv6{}, - &tb.ICMPv6{ - Type: tb.ICMPv6Type(header.ICMPv6ParamProblem), - Code: tb.Byte(2), - NDPPayload: icmpv6Payload, - }, - }, time.Second) - if tt.wantICMPv6 && err != nil { - t.Fatalf("expected ICMPv6 Parameter Problem but got none: %s", err) - } - if !tt.wantICMPv6 && gotICMPv6 != nil { - t.Fatalf("expected no ICMPv6 Parameter Problem but got one: %s", gotICMPv6) - } - }) - } -} diff --git a/test/packetimpact/tests/tcp_close_wait_ack_test.go b/test/packetimpact/tests/tcp_close_wait_ack_test.go deleted file mode 100644 index 6e7ff41d7..000000000 --- a/test/packetimpact/tests/tcp_close_wait_ack_test.go +++ /dev/null @@ -1,108 +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_close_wait_ack_test - -import ( - "flag" - "fmt" - "testing" - "time" - - "golang.org/x/sys/unix" - "gvisor.dev/gvisor/pkg/tcpip/header" - "gvisor.dev/gvisor/pkg/tcpip/seqnum" - "gvisor.dev/gvisor/test/packetimpact/testbench" -) - -func init() { - testbench.RegisterFlags(flag.CommandLine) -} - -func TestCloseWaitAck(t *testing.T) { - for _, tt := range []struct { - description string - makeTestingTCP func(conn *testbench.TCPIPv4, seqNumOffset seqnum.Size, windowSize seqnum.Size) testbench.TCP - seqNumOffset seqnum.Size - expectAck bool - }{ - {"OTW", GenerateOTWSeqSegment, 0, false}, - {"OTW", GenerateOTWSeqSegment, 1, true}, - {"OTW", GenerateOTWSeqSegment, 2, true}, - {"ACK", GenerateUnaccACKSegment, 0, false}, - {"ACK", GenerateUnaccACKSegment, 1, true}, - {"ACK", GenerateUnaccACKSegment, 2, true}, - } { - t.Run(fmt.Sprintf("%s%d", tt.description, tt.seqNumOffset), 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}, testbench.TCP{SrcPort: &remotePort}) - defer conn.Close() - - conn.Connect() - acceptFd, _ := dut.Accept(listenFd) - - // Send a FIN to DUT to intiate the active close - 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), &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) - } - if !tt.expectAck && gotAck != nil { - t.Fatalf("expected no ack but got one: %s", gotAck) - } - - // Now let's verify DUT is indeed in CLOSE_WAIT - dut.Close(acceptFd) - 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(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) - // Send some extra data to DUT - 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) - } - }) - } -} - -// 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 *testbench.TCPIPv4, seqNumOffset seqnum.Size, windowSize seqnum.Size) testbench.TCP { - lastAcceptable := conn.LocalSeqNum().Add(windowSize) - otwSeq := uint32(lastAcceptable.Add(seqNumOffset)) - 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 *testbench.TCPIPv4, seqNumOffset seqnum.Size, windowSize seqnum.Size) testbench.TCP { - lastAcceptable := conn.RemoteSeqNum() - unaccAck := uint32(lastAcceptable.Add(seqNumOffset)) - 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 deleted file mode 100644 index fb8f48629..000000000 --- a/test/packetimpact/tests/tcp_cork_mss_test.go +++ /dev/null @@ -1,84 +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_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_handshake_window_size_test.go b/test/packetimpact/tests/tcp_handshake_window_size_test.go deleted file mode 100644 index 652b530d0..000000000 --- a/test/packetimpact/tests/tcp_handshake_window_size_test.go +++ /dev/null @@ -1,66 +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_handshake_window_size_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) -} - -// TestTCPHandshakeWindowSize tests if the stack is honoring the window size -// communicated during handshake. -func TestTCPHandshakeWindowSize(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() - - // Start handshake with zero window size. - conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagSyn), WindowSize: testbench.Uint16(uint16(0))}) - 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) - } - // Update the advertised window size to a non-zero value with the ACK that - // completes the handshake. - // - // Set the window size with MSB set and expect the dut to treat it as - // an unsigned value. - conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(uint16(1 << 15))}) - - acceptFd, _ := dut.Accept(listenFD) - defer dut.Close(acceptFd) - - sampleData := []byte("Sample Data") - samplePayload := &testbench.Payload{Bytes: sampleData} - - // Since we advertised a zero window followed by a non-zero window, - // expect the dut to honor the recently advertised non-zero window - // and actually send out the data instead of probing for zero window. - dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectNextData(&testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck | header.TCPFlagPsh)}, samplePayload, time.Second); err != nil { - t.Fatalf("expected payload was not received: %s", err) - } -} diff --git a/test/packetimpact/tests/tcp_noaccept_close_rst_test.go b/test/packetimpact/tests/tcp_noaccept_close_rst_test.go deleted file mode 100644 index b9b3e91d3..000000000 --- a/test/packetimpact/tests/tcp_noaccept_close_rst_test.go +++ /dev/null @@ -1,42 +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_noaccept_close_rst_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) -} - -func TestTcpNoAcceptCloseReset(t *testing.T) { - dut := testbench.NewDUT(t) - defer dut.TearDown() - listenFd, remotePort := dut.CreateListener(unix.SOCK_STREAM, unix.IPPROTO_TCP, 1) - conn := testbench.NewTCPIPv4(t, testbench.TCP{DstPort: &remotePort}, testbench.TCP{SrcPort: &remotePort}) - conn.Connect() - defer conn.Close() - dut.Close(listenFd) - 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 deleted file mode 100644 index ad8c74234..000000000 --- a/test/packetimpact/tests/tcp_outside_the_window_test.go +++ /dev/null @@ -1,93 +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_outside_the_window_test - -import ( - "flag" - "fmt" - "testing" - "time" - - "golang.org/x/sys/unix" - "gvisor.dev/gvisor/pkg/tcpip/header" - "gvisor.dev/gvisor/pkg/tcpip/seqnum" - "gvisor.dev/gvisor/test/packetimpact/testbench" -) - -func init() { - testbench.RegisterFlags(flag.CommandLine) -} - -// TestTCPOutsideTheWindows tests the behavior of the DUT when packets arrive -// that are inside or outside the TCP window. Packets that are outside the -// window should force an extra ACK, as described in RFC793 page 69: -// https://tools.ietf.org/html/rfc793#page-69 -func TestTCPOutsideTheWindow(t *testing.T) { - for _, tt := range []struct { - description string - tcpFlags uint8 - payload []testbench.Layer - seqNumOffset seqnum.Size - expectACK bool - }{ - {"SYN", header.TCPFlagSyn, nil, 0, true}, - {"SYNACK", header.TCPFlagSyn | header.TCPFlagAck, nil, 0, true}, - {"ACK", header.TCPFlagAck, nil, 0, false}, - {"FIN", header.TCPFlagFin, nil, 0, false}, - {"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, []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, []testbench.Layer{&testbench.Payload{Bytes: []byte("abc123")}}, 2, true}, - } { - t.Run(fmt.Sprintf("%s%d", tt.description, tt.seqNumOffset), 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}, testbench.TCP{SrcPort: &remotePort}) - defer conn.Close() - conn.Connect() - acceptFD, _ := dut.Accept(listenFD) - defer dut.Close(acceptFD) - - windowSize := seqnum.Size(*conn.SynAck().WindowSize) + tt.seqNumOffset - conn.Drain() - // Ignore whatever incrementing that this out-of-order packet might cause - // to the AckNum. - 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(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) - } - if !tt.expectACK && gotACK != nil { - t.Fatalf("expected no ACK packet within %s but got one: %s", timeout, gotACK) - } - }) - } -} diff --git a/test/packetimpact/tests/tcp_paws_mechanism_test.go b/test/packetimpact/tests/tcp_paws_mechanism_test.go deleted file mode 100644 index 55db4ece6..000000000 --- a/test/packetimpact/tests/tcp_paws_mechanism_test.go +++ /dev/null @@ -1,109 +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_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 deleted file mode 100644 index 8fbec893b..000000000 --- a/test/packetimpact/tests/tcp_queue_receive_in_syn_sent_test.go +++ /dev/null @@ -1,132 +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_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) -} - -// TestQueueReceiveInSynSent tests receive behavior when the TCP state -// is SYN-SENT. -// It tests for 2 variants where the receive is blocked and: -// (1) we complete handshake and send sample data. -// (2) we send a TCP RST. -func TestQueueReceiveInSynSent(t *testing.T) { - for _, tt := range []struct { - description string - reset bool - }{ - {description: "Send DATA", reset: false}, - {description: "Send RST", reset: true}, - } { - t.Run(tt.description, func(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) - } - - if _, _, err := dut.RecvWithErrno(context.Background(), socket, int32(len(sampleData)), 0); err != syscall.Errno(unix.EWOULDBLOCK) { - t.Fatalf("expected error %s, got %s", syscall.Errno(unix.EWOULDBLOCK), err) - } - - // Test blocking read. - dut.SetNonBlocking(socket, false) - - var wg sync.WaitGroup - defer wg.Wait() - wg.Add(1) - var block sync.WaitGroup - block.Add(1) - go func() { - defer wg.Done() - ctx, cancel := context.WithTimeout(context.Background(), time.Second*3) - defer cancel() - - block.Done() - // Issue RECEIVE call in SYN-SENT, this should be queued for - // process until the connection is established. - n, buff, err := dut.RecvWithErrno(ctx, socket, int32(len(sampleData)), 0) - if tt.reset { - if err != syscall.Errno(unix.ECONNREFUSED) { - t.Errorf("expected error %s, got %s", syscall.Errno(unix.ECONNREFUSED), err) - } - if n != -1 { - t.Errorf("expected return value %d, got %d", -1, n) - } - return - } - if n == -1 { - t.Errorf("failed to recv on DUT: %s", err) - } - if got := buff[:n]; !bytes.Equal(got, sampleData) { - t.Errorf("received data doesn't match, got:\n%s, want:\n%s", hex.Dump(got), hex.Dump(sampleData)) - } - }() - - // Wait for the goroutine to be scheduled and before it - // blocks on endpoint receive. - block.Wait() - // The following sleep is used to prevent the connection - // from being established before we are blocked on Recv. - time.Sleep(100 * time.Millisecond) - - if tt.reset { - conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagRst | header.TCPFlagAck)}) - return - } - - // 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 payload and expect an ACK. - conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}, &testbench.Payload{Bytes: sampleData}) - 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) - } - }) - } -} diff --git a/test/packetimpact/tests/tcp_reordering_test.go b/test/packetimpact/tests/tcp_reordering_test.go deleted file mode 100644 index a5378a9dd..000000000 --- a/test/packetimpact/tests/tcp_reordering_test.go +++ /dev/null @@ -1,174 +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 reordering_test - -import ( - "flag" - "testing" - "time" - - "golang.org/x/sys/unix" - "gvisor.dev/gvisor/pkg/tcpip/header" - "gvisor.dev/gvisor/pkg/tcpip/seqnum" - tb "gvisor.dev/gvisor/test/packetimpact/testbench" -) - -func init() { - tb.RegisterFlags(flag.CommandLine) -} - -func TestReorderingWindow(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}, tb.TCP{SrcPort: &remotePort}) - defer conn.Close() - - // Enable SACK. - opts := make([]byte, 40) - optsOff := 0 - optsOff += header.EncodeNOP(opts[optsOff:]) - optsOff += header.EncodeNOP(opts[optsOff:]) - optsOff += header.EncodeSACKPermittedOption(opts[optsOff:]) - - // Ethernet guarantees that the MTU is at least 1500 bytes. - const minMTU = 1500 - const mss = minMTU - header.IPv4MinimumSize - header.TCPMinimumSize - optsOff += header.EncodeMSSOption(mss, opts[optsOff:]) - - conn.ConnectWithOptions(opts[:optsOff]) - - acceptFd, _ := dut.Accept(listenFd) - defer dut.Close(acceptFd) - - if tb.DUTType == "linux" { - // Linux has changed its handling of reordering, force the old behavior. - dut.SetSockOpt(acceptFd, unix.IPPROTO_TCP, unix.TCP_CONGESTION, []byte("reno")) - } - - pls := dut.GetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_MAXSEG) - if tb.DUTType == "netstack" { - // netstack does not impliment TCP_MAXSEG correctly. Fake it - // here. Netstack uses the max SACK size which is 32. The MSS - // option is 8 bytes, making the total 36 bytes. - pls = mss - 36 - } - - payload := make([]byte, pls) - - seqNum1 := *conn.RemoteSeqNum() - const numPkts = 10 - // Send some packets, checking that we receive each. - for i, sn := 0, seqNum1; i < numPkts; i++ { - dut.Send(acceptFd, payload, 0) - - gotOne, err := conn.Expect(tb.TCP{SeqNum: tb.Uint32(uint32(sn))}, time.Second) - sn.UpdateForward(seqnum.Size(len(payload))) - if err != nil { - t.Errorf("Expect #%d: %s", i+1, err) - continue - } - if gotOne == nil { - t.Errorf("#%d: expected a packet within a second but got none", i+1) - } - } - - seqNum2 := *conn.RemoteSeqNum() - - // SACK packets #2-4. - sackBlock := make([]byte, 40) - sbOff := 0 - sbOff += header.EncodeNOP(sackBlock[sbOff:]) - sbOff += header.EncodeNOP(sackBlock[sbOff:]) - sbOff += header.EncodeSACKBlocks([]header.SACKBlock{{ - seqNum1.Add(seqnum.Size(len(payload))), - seqNum1.Add(seqnum.Size(4 * len(payload))), - }}, sackBlock[sbOff:]) - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), AckNum: tb.Uint32(uint32(seqNum1)), Options: sackBlock[:sbOff]}) - - // ACK first packet. - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), AckNum: tb.Uint32(uint32(seqNum1) + uint32(len(payload)))}) - - // Check for retransmit. - gotOne, err := conn.Expect(tb.TCP{SeqNum: tb.Uint32(uint32(seqNum1))}, time.Second) - if err != nil { - t.Error("Expect for retransmit:", err) - } - if gotOne == nil { - t.Error("expected a retransmitted packet within a second but got none") - } - - // ACK all send packets with a DSACK block for packet #1. This tells - // the other end that we got both the original and retransmit for - // packet #1. - dsackBlock := make([]byte, 40) - dsbOff := 0 - dsbOff += header.EncodeNOP(dsackBlock[dsbOff:]) - dsbOff += header.EncodeNOP(dsackBlock[dsbOff:]) - dsbOff += header.EncodeSACKBlocks([]header.SACKBlock{{ - seqNum1.Add(seqnum.Size(len(payload))), - seqNum1.Add(seqnum.Size(4 * len(payload))), - }}, dsackBlock[dsbOff:]) - - conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck), AckNum: tb.Uint32(uint32(seqNum2)), Options: dsackBlock[:dsbOff]}) - - // Send half of the original window of packets, checking that we - // received each. - for i, sn := 0, seqNum2; i < numPkts/2; i++ { - dut.Send(acceptFd, payload, 0) - - gotOne, err := conn.Expect(tb.TCP{SeqNum: tb.Uint32(uint32(sn))}, time.Second) - sn.UpdateForward(seqnum.Size(len(payload))) - if err != nil { - t.Errorf("Expect #%d: %s", i+1, err) - continue - } - if gotOne == nil { - t.Errorf("#%d: expected a packet within a second but got none", i+1) - } - } - - if tb.DUTType == "netstack" { - // The window should now be halved, so we should receive any - // more, even if we send them. - dut.Send(acceptFd, payload, 0) - if got, err := conn.Expect(tb.TCP{}, 100*time.Millisecond); got != nil || err == nil { - t.Fatalf("expected no packets within 100 millisecond, but got one: %s", got) - } - return - } - - // Linux reduces the window by three. Check that we can receive the rest. - for i, sn := 0, seqNum2.Add(seqnum.Size(numPkts/2*len(payload))); i < 2; i++ { - dut.Send(acceptFd, payload, 0) - - gotOne, err := conn.Expect(tb.TCP{SeqNum: tb.Uint32(uint32(sn))}, time.Second) - sn.UpdateForward(seqnum.Size(len(payload))) - if err != nil { - t.Errorf("Expect #%d: %s", i+1, err) - continue - } - if gotOne == nil { - t.Errorf("#%d: expected a packet within a second but got none", i+1) - } - } - - // The window should now be full. - dut.Send(acceptFd, payload, 0) - if got, err := conn.Expect(tb.TCP{}, 100*time.Millisecond); got != nil || err == nil { - t.Fatalf("expected no packets within 100 millisecond, but got one: %s", got) - } -} diff --git a/test/packetimpact/tests/tcp_retransmits_test.go b/test/packetimpact/tests/tcp_retransmits_test.go deleted file mode 100644 index 6940eb7fb..000000000 --- a/test/packetimpact/tests/tcp_retransmits_test.go +++ /dev/null @@ -1,84 +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_retransmits_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) -} - -// TestRetransmits tests retransmits occur at exponentially increasing -// time intervals. -func TestRetransmits(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() - acceptFd, _ := dut.Accept(listenFd) - defer dut.Close(acceptFd) - - dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) - - sampleData := []byte("Sample Data") - samplePayload := &testbench.Payload{Bytes: sampleData} - - dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { - t.Fatalf("expected payload was not received: %s", 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(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) - - startRTO := time.Second - current := startRTO - first := time.Now() - dut.Send(acceptFd, sampleData, 0) - seq := testbench.Uint32(uint32(*conn.RemoteSeqNum())) - if _, err := conn.ExpectData(&testbench.TCP{SeqNum: seq}, samplePayload, startRTO); err != nil { - t.Fatalf("expected payload was not received: %s", err) - } - // Expect retransmits of the same segment. - for i := 0; i < 5; i++ { - start := time.Now() - if _, err := conn.ExpectData(&testbench.TCP{SeqNum: seq}, samplePayload, 2*current); err != nil { - t.Fatalf("expected payload was not received: %s loop %d", err, i) - } - if i == 0 { - startRTO = time.Now().Sub(first) - current = 2 * startRTO - continue - } - // Check if the probes came at exponentially increasing intervals. - if p := time.Since(start); p < current-startRTO { - t.Fatalf("retransmit came sooner interval %d probe %d", p, i) - } - current *= 2 - } -} diff --git a/test/packetimpact/tests/tcp_send_window_sizes_piggyback_test.go b/test/packetimpact/tests/tcp_send_window_sizes_piggyback_test.go deleted file mode 100644 index 90ab85419..000000000 --- a/test/packetimpact/tests/tcp_send_window_sizes_piggyback_test.go +++ /dev/null @@ -1,105 +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_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_synrcvd_reset_test.go b/test/packetimpact/tests/tcp_synrcvd_reset_test.go deleted file mode 100644 index 7d5deab01..000000000 --- a/test/packetimpact/tests/tcp_synrcvd_reset_test.go +++ /dev/null @@ -1,52 +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_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 deleted file mode 100644 index 6898a2239..000000000 --- a/test/packetimpact/tests/tcp_synsent_reset_test.go +++ /dev/null @@ -1,88 +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_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 deleted file mode 100644 index 87e45d765..000000000 --- a/test/packetimpact/tests/tcp_user_timeout_test.go +++ /dev/null @@ -1,105 +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_user_timeout_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) -} - -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(&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 *testbench.TCPIPv4, dut *testbench.DUT, fd int32) error { - dut.Close(fd) - return nil -} - -func TestTCPUserTimeout(t *testing.T) { - for _, tt := range []struct { - description string - userTimeout time.Duration - sendDelay time.Duration - }{ - {"NoUserTimeout", 0, 3 * time.Second}, - {"ACKBeforeUserTimeout", 5 * time.Second, 4 * time.Second}, - {"ACKAfterUserTimeout", 5 * time.Second, 7 * time.Second}, - } { - for _, ttf := range []struct { - description string - 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 := 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() - acceptFD, _ := dut.Accept(listenFD) - - if tt.userTimeout != 0 { - dut.SetSockOptInt(acceptFD, unix.SOL_TCP, unix.TCP_USER_TIMEOUT, int32(tt.userTimeout.Milliseconds())) - } - - if err := ttf.f(&conn, &dut, acceptFD); err != nil { - t.Fatal(err) - } - - time.Sleep(tt.sendDelay) - conn.Drain() - 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(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) - } - if !expectRST && got != nil { - t.Errorf("expected no RST packet within %s but got one: %s", expectTimeout, got) - } - }) - } - } -} diff --git a/test/packetimpact/tests/tcp_window_shrink_test.go b/test/packetimpact/tests/tcp_window_shrink_test.go deleted file mode 100644 index e78d04756..000000000 --- a/test/packetimpact/tests/tcp_window_shrink_test.go +++ /dev/null @@ -1,73 +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_window_shrink_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) -} - -func TestWindowShrink(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() - acceptFd, _ := dut.Accept(listenFd) - defer dut.Close(acceptFd) - - dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) - - sampleData := []byte("Sample Data") - samplePayload := &testbench.Payload{Bytes: sampleData} - - dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { - t.Fatalf("expected payload was not received: %s", err) - } - conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck)}) - - dut.Send(acceptFd, sampleData, 0) - dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { - t.Fatalf("expected payload was not received: %s", err) - } - if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { - t.Fatalf("expected payload was not received: %s", err) - } - // We close our receiving window here - 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(&testbench.TCP{SeqNum: testbench.Uint32(uint32(expectedRemoteSeqNum))}, nil, time.Second); err != nil { - t.Fatalf("expected a packet with sequence number %d: %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 deleted file mode 100644 index 5ab193181..000000000 --- a/test/packetimpact/tests/tcp_zero_window_probe_retransmit_test.go +++ /dev/null @@ -1,105 +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_zero_window_probe_retransmit_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) -} - -// TestZeroWindowProbeRetransmit tests retransmits of zero window probes -// to be sent at exponentially inreasing time intervals. -func TestZeroWindowProbeRetransmit(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() - acceptFd, _ := dut.Accept(listenFd) - defer dut.Close(acceptFd) - - dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) - - sampleData := []byte("Sample Data") - samplePayload := &testbench.Payload{Bytes: sampleData} - - // Send and receive sample data to the dut. - dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { - t.Fatalf("expected payload was not received: %s", err) - } - 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 packet was not received: %s", err) - } - - // Check for the dut to keep the connection alive as long as the zero window - // probes are acknowledged. Check if the zero window probes are sent at - // exponentially increasing intervals. The timeout intervals are function - // of the recorded first zero probe transmission duration. - // - // Advertize zero receive window again. - 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 - first := time.Now() - // Ask the dut to send out data. - dut.Send(acceptFd, sampleData, 0) - // Expect the dut to keep the connection alive as long as the remote is - // acknowledging the zero-window probes. - for i := 0; i < 5; i++ { - start := time.Now() - // 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(&testbench.TCP{SeqNum: probeSeq}, nil, 2*current); err != nil { - t.Fatalf("expected a probe with sequence number %d: loop %d", probeSeq, i) - } - if i == 0 { - startProbeDuration = time.Now().Sub(first) - current = 2 * startProbeDuration - continue - } - // Check if the probes came at exponentially increasing intervals. - if p := time.Since(start); p < current-startProbeDuration { - t.Fatalf("zero probe came sooner interval %d probe %d\n", p, i) - } - // Acknowledge the zero-window probes from the dut. - conn.Send(testbench.TCP{AckNum: ackProbe, Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(0)}) - current *= 2 - } - // Advertize non-zero window. - conn.Send(testbench.TCP{AckNum: ackProbe, Flags: testbench.Uint8(header.TCPFlagAck)}) - // Expect the dut to recover and transmit data. - if _, err := conn.ExpectData(&testbench. - TCP{SeqNum: ackProbe}, samplePayload, time.Second); err != nil { - t.Fatalf("expected payload was not received: %s", err) - } -} diff --git a/test/packetimpact/tests/tcp_zero_window_probe_test.go b/test/packetimpact/tests/tcp_zero_window_probe_test.go deleted file mode 100644 index 649fd5699..000000000 --- a/test/packetimpact/tests/tcp_zero_window_probe_test.go +++ /dev/null @@ -1,112 +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_zero_window_probe_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) -} - -// TestZeroWindowProbe tests few cases of zero window probing over the -// same connection. -func TestZeroWindowProbe(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() - acceptFd, _ := dut.Accept(listenFd) - defer dut.Close(acceptFd) - - dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) - - sampleData := []byte("Sample Data") - 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(&testbench.TCP{}, samplePayload, time.Second); err != nil { - t.Fatalf("expected payload was not received: %s", err) - } - sendTime := time.Now().Sub(start) - 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 packet was not received: %s", err) - } - - // Test 1: Check for receive of a zero window probe, record the duration for - // probe to be sent. - // - // Advertize zero window to the dut. - conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(0)}) - - // Expected sequence number of the zero window probe. - probeSeq := testbench.Uint32(uint32(*conn.RemoteSeqNum() - 1)) - // Expected ack number of the ACK for the probe. - 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(&testbench.TCP{SeqNum: probeSeq}, nil, 2*time.Second); err == nil { - t.Fatalf("unexpected packet with sequence number %d: %s", probeSeq, err) - } - - 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(&testbench.TCP{SeqNum: probeSeq}, nil, time.Second); err != nil { - t.Fatalf("expected a packet with sequence number %d: %s", probeSeq, err) - } - // Expect the probe to be sent after some time. Compare against the previous - // time recorded when the dut immediately sends out data on receiving the - // send command. - if startProbeDuration := time.Now().Sub(start); startProbeDuration <= sendTime { - t.Fatalf("expected the first probe to be sent out after retransmission interval, got %s want > %s", startProbeDuration, sendTime) - } - - // Test 2: Check if the dut recovers on advertizing non-zero receive window. - // 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(testbench.TCP{AckNum: ackProbe, Flags: testbench.Uint8(header.TCPFlagAck)}) - // Expect the dut to recover and transmit data. - if _, err := conn.ExpectData(&testbench.TCP{SeqNum: ackProbe}, samplePayload, time.Second); err != nil { - t.Fatalf("expected payload was not received: %s", err) - } - - // Test 3: Sanity check for dut's processing of a similar probe it sent. - // 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 := 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 deleted file mode 100644 index 3c467b14f..000000000 --- a/test/packetimpact/tests/tcp_zero_window_probe_usertimeout_test.go +++ /dev/null @@ -1,98 +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_zero_window_probe_usertimeout_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) -} - -// TestZeroWindowProbeUserTimeout sanity tests user timeout when we are -// retransmitting zero window probes. -func TestZeroWindowProbeUserTimeout(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() - acceptFd, _ := dut.Accept(listenFd) - defer dut.Close(acceptFd) - - dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_NODELAY, 1) - - sampleData := []byte("Sample Data") - samplePayload := &testbench.Payload{Bytes: sampleData} - - // Send and receive sample data to the dut. - dut.Send(acceptFd, sampleData, 0) - if _, err := conn.ExpectData(&testbench.TCP{}, samplePayload, time.Second); err != nil { - t.Fatalf("expected payload was not received: %s", err) - } - 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 packet was not received: %s", err) - } - - // Test 1: Check for receive of a zero window probe, record the duration for - // probe to be sent. - // - // Advertize zero window to the dut. - conn.Send(testbench.TCP{Flags: testbench.Uint8(header.TCPFlagAck), WindowSize: testbench.Uint16(0)}) - - // Expected sequence number of the zero window probe. - 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(&testbench.TCP{SeqNum: probeSeq}, nil, time.Second); err != nil { - t.Fatalf("expected a packet with sequence number %d: %s", probeSeq, err) - } - // Record the duration for first probe, the dut sends the zero window probe after - // a retransmission time interval. - startProbeDuration := time.Now().Sub(start) - - // Test 2: Check if the dut times out the connection by honoring usertimeout - // when the dut is sending zero-window probes. - // - // Reduce the retransmit timeout. - dut.SetSockOptInt(acceptFd, unix.IPPROTO_TCP, unix.TCP_USER_TIMEOUT, int32(startProbeDuration.Milliseconds())) - // Advertize zero window again. - 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) - - // Wait for the connection to timeout after multiple zero-window probe retransmissions. - time.Sleep(8 * startProbeDuration) - - // 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(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/udp_icmp_error_propagation_test.go b/test/packetimpact/tests/udp_icmp_error_propagation_test.go deleted file mode 100644 index b754918f6..000000000 --- a/test/packetimpact/tests/udp_icmp_error_propagation_test.go +++ /dev/null @@ -1,365 +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 udp_icmp_error_propagation_test - -import ( - "context" - "flag" - "fmt" - "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) -} - -type connectionMode bool - -func (c connectionMode) String() string { - if c { - return "Connected" - } - return "Connectionless" -} - -type icmpError int - -const ( - portUnreachable icmpError = iota - timeToLiveExceeded -) - -func (e icmpError) String() string { - switch e { - case portUnreachable: - return "PortUnreachable" - case timeToLiveExceeded: - return "TimeToLiveExpired" - } - return "Unknown ICMP error" -} - -func (e icmpError) ToICMPv4() *testbench.ICMPv4 { - switch e { - case portUnreachable: - return &testbench.ICMPv4{Type: testbench.ICMPv4Type(header.ICMPv4DstUnreachable), Code: testbench.Uint8(header.ICMPv4PortUnreachable)} - case timeToLiveExceeded: - return &testbench.ICMPv4{Type: testbench.ICMPv4Type(header.ICMPv4TimeExceeded), Code: testbench.Uint8(header.ICMPv4TTLExceeded)} - } - return nil -} - -type errorDetection struct { - name string - useValidConn bool - f func(context.Context, testData) error -} - -type testData struct { - dut *testbench.DUT - conn *testbench.UDPIPv4 - remoteFD int32 - remotePort uint16 - cleanFD int32 - cleanPort uint16 - wantErrno syscall.Errno -} - -// wantErrno computes the errno to expect given the connection mode of a UDP -// socket and the ICMP error it will receive. -func wantErrno(c connectionMode, icmpErr icmpError) syscall.Errno { - if c && icmpErr == portUnreachable { - return syscall.Errno(unix.ECONNREFUSED) - } - return syscall.Errno(0) -} - -// sendICMPError sends an ICMP error message in response to a UDP datagram. -func sendICMPError(conn *testbench.UDPIPv4, icmpErr icmpError, udp *testbench.UDP) error { - layers := (*testbench.Connection)(conn).CreateFrame(nil) - layers = layers[:len(layers)-1] - ip, ok := udp.Prev().(*testbench.IPv4) - if !ok { - return fmt.Errorf("expected %s to be IPv4", udp.Prev()) - } - if icmpErr == timeToLiveExceeded { - *ip.TTL = 1 - // Let serialization recalculate the checksum since we set the TTL - // to 1. - ip.Checksum = nil - } - // Note that the ICMP payload is valid in this case because the UDP - // payload is empty. If the UDP payload were not empty, the packet - // length during serialization may not be calculated correctly, - // resulting in a mal-formed packet. - layers = append(layers, icmpErr.ToICMPv4(), ip, udp) - - (*testbench.Connection)(conn).SendFrameStateless(layers) - return nil -} - -// testRecv tests observing the ICMP error through the recv syscall. A packet -// is sent to the DUT, and if wantErrno is non-zero, then the first recv should -// fail and the second should succeed. Otherwise if wantErrno is zero then the -// first recv should succeed immediately. -func testRecv(ctx context.Context, d testData) error { - // Check that receiving on the clean socket works. - d.conn.Send(testbench.UDP{DstPort: &d.cleanPort}) - d.dut.Recv(d.cleanFD, 100, 0) - - d.conn.Send(testbench.UDP{}) - - if d.wantErrno != syscall.Errno(0) { - ctx, cancel := context.WithTimeout(ctx, time.Second) - defer cancel() - ret, _, err := d.dut.RecvWithErrno(ctx, d.remoteFD, 100, 0) - if ret != -1 { - return fmt.Errorf("recv after ICMP error succeeded unexpectedly, expected (%[1]d) %[1]v", d.wantErrno) - } - if err != d.wantErrno { - return fmt.Errorf("recv after ICMP error resulted in error (%[1]d) %[1]v, expected (%[2]d) %[2]v", err, d.wantErrno) - } - } - - d.dut.Recv(d.remoteFD, 100, 0) - return nil -} - -// testSendTo tests observing the ICMP error through the send syscall. If -// wantErrno is non-zero, the first send should fail and a subsequent send -// should suceed; while if wantErrno is zero then the first send should just -// succeed. -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(testbench.UDP{SrcPort: &d.cleanPort}, time.Second); err != nil { - return fmt.Errorf("did not receive UDP packet from clean socket on DUT: %s", err) - } - - if d.wantErrno != syscall.Errno(0) { - ctx, cancel := context.WithTimeout(ctx, time.Second) - defer cancel() - ret, err := d.dut.SendToWithErrno(ctx, d.remoteFD, nil, 0, d.conn.LocalAddr()) - - if ret != -1 { - return fmt.Errorf("sendto after ICMP error succeeded unexpectedly, expected (%[1]d) %[1]v", d.wantErrno) - } - if err != d.wantErrno { - return fmt.Errorf("sendto after ICMP error resulted in error (%[1]d) %[1]v, expected (%[2]d) %[2]v", err, d.wantErrno) - } - } - - d.dut.SendTo(d.remoteFD, nil, 0, d.conn.LocalAddr()) - 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 -} - -func testSockOpt(_ context.Context, d testData) error { - // Check that there's no pending error on the clean socket. - if errno := syscall.Errno(d.dut.GetSockOptInt(d.cleanFD, unix.SOL_SOCKET, unix.SO_ERROR)); errno != syscall.Errno(0) { - return fmt.Errorf("unexpected error (%[1]d) %[1]v on clean socket", errno) - } - - if errno := syscall.Errno(d.dut.GetSockOptInt(d.remoteFD, unix.SOL_SOCKET, unix.SO_ERROR)); errno != d.wantErrno { - return fmt.Errorf("SO_ERROR sockopt after ICMP error is (%[1]d) %[1]v, expected (%[2]d) %[2]v", errno, d.wantErrno) - } - - // 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(testbench.UDP{}, time.Second); err != nil { - return fmt.Errorf("did not receive UDP packet as expected: %s", err) - } - return nil -} - -// TestUDPICMPErrorPropagation tests that ICMP error messages in response to -// UDP datagrams are processed correctly. RFC 1122 section 4.1.3.3 states that: -// "UDP MUST pass to the application layer all ICMP error messages that it -// receives from the IP layer." -// -// The test cases are parametrized in 3 dimensions: 1. the UDP socket is either -// put into connection mode or left connectionless, 2. the ICMP message type -// and code, and 3. the method by which the ICMP error is observed on the -// socket: sendto, recv, or getsockopt(SO_ERROR). -// -// Linux's udp(7) man page states: "All fatal errors will be passed to the user -// as an error return even when the socket is not connected. This includes -// asynchronous errors received from the network." In practice, the only -// combination of parameters to the test that causes an error to be observable -// on the UDP socket is receiving a port unreachable message on a connected -// socket. -func TestUDPICMPErrorPropagation(t *testing.T) { - for _, connect := range []connectionMode{true, false} { - for _, icmpErr := range []icmpError{portUnreachable, timeToLiveExceeded} { - wantErrno := wantErrno(connect, icmpErr) - - for _, errDetect := range []errorDetection{ - errorDetection{"SendTo", false, testSendTo}, - // Send to an address that's different from the one that caused an ICMP - // error to be returned. - errorDetection{"SendToValid", true, testSendTo}, - errorDetection{"Recv", false, testRecv}, - errorDetection{"SockOpt", false, testSockOpt}, - } { - t.Run(fmt.Sprintf("%s/%s/%s", connect, icmpErr, errDetect.name), func(t *testing.T) { - dut := testbench.NewDUT(t) - defer dut.TearDown() - - remoteFD, remotePort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) - defer dut.Close(remoteFD) - - // Create a second, clean socket on the DUT to ensure that the ICMP - // error messages only affect the sockets they are intended for. - cleanFD, cleanPort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) - defer dut.Close(cleanFD) - - conn := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) - defer conn.Close() - - if connect { - dut.Connect(remoteFD, conn.LocalAddr()) - dut.Connect(cleanFD, conn.LocalAddr()) - } - - dut.SendTo(remoteFD, nil, 0, conn.LocalAddr()) - udp, err := conn.Expect(testbench.UDP{}, time.Second) - if err != nil { - t.Fatalf("did not receive message from DUT: %s", err) - } - - if err := sendICMPError(&conn, icmpErr, udp); err != nil { - t.Fatal(err) - } - - errDetectConn := &conn - if errDetect.useValidConn { - // connClean is a UDP socket on the test runner that was not - // 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 := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) - defer connClean.Close() - - errDetectConn = &connClean - } - - if err := errDetect.f(context.Background(), testData{&dut, errDetectConn, remoteFD, remotePort, cleanFD, cleanPort, wantErrno}); err != nil { - t.Fatal(err) - } - }) - } - } - } -} - -// TestICMPErrorDuringUDPRecv tests behavior when a UDP socket is in the middle -// of a blocking recv and receives an ICMP error. -func TestICMPErrorDuringUDPRecv(t *testing.T) { - for _, connect := range []connectionMode{true, false} { - for _, icmpErr := range []icmpError{portUnreachable, timeToLiveExceeded} { - wantErrno := wantErrno(connect, icmpErr) - - t.Run(fmt.Sprintf("%s/%s", connect, icmpErr), func(t *testing.T) { - dut := testbench.NewDUT(t) - defer dut.TearDown() - - remoteFD, remotePort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) - defer dut.Close(remoteFD) - - // Create a second, clean socket on the DUT to ensure that the ICMP - // error messages only affect the sockets they are intended for. - cleanFD, cleanPort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0")) - defer dut.Close(cleanFD) - - conn := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) - defer conn.Close() - - if connect { - dut.Connect(remoteFD, conn.LocalAddr()) - dut.Connect(cleanFD, conn.LocalAddr()) - } - - dut.SendTo(remoteFD, nil, 0, conn.LocalAddr()) - udp, err := conn.Expect(testbench.UDP{}, time.Second) - if err != nil { - t.Fatalf("did not receive message from DUT: %s", err) - } - - var wg sync.WaitGroup - wg.Add(2) - go func() { - defer wg.Done() - - if wantErrno != syscall.Errno(0) { - ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second) - defer cancel() - - ret, _, err := dut.RecvWithErrno(ctx, remoteFD, 100, 0) - if ret != -1 { - t.Errorf("recv during ICMP error succeeded unexpectedly, expected (%[1]d) %[1]v", wantErrno) - return - } - if err != wantErrno { - t.Errorf("recv during ICMP error resulted in error (%[1]d) %[1]v, expected (%[2]d) %[2]v", err, wantErrno) - return - } - } - - ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second) - defer cancel() - - if ret, _, err := dut.RecvWithErrno(ctx, remoteFD, 100, 0); ret == -1 { - t.Errorf("recv after ICMP error failed with (%[1]d) %[1]", err) - } - }() - - go func() { - defer wg.Done() - - ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second) - defer cancel() - - if ret, _, err := dut.RecvWithErrno(ctx, cleanFD, 100, 0); ret == -1 { - t.Errorf("recv on clean socket failed with (%[1]d) %[1]", err) - } - }() - - // TODO(b/155684889) This sleep is to allow time for the DUT to - // actually call recv since we want the ICMP error to arrive during the - // blocking recv, and should be replaced when a better synchronization - // alternative is available. - time.Sleep(2 * time.Second) - - if err := sendICMPError(&conn, icmpErr, udp); err != nil { - t.Fatal(err) - } - - 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 deleted file mode 100644 index 77a9bfa1d..000000000 --- a/test/packetimpact/tests/udp_recv_multicast_test.go +++ /dev/null @@ -1,40 +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 udp_recv_multicast_test - -import ( - "flag" - "net" - "testing" - - "golang.org/x/sys/unix" - "gvisor.dev/gvisor/pkg/tcpip" - "gvisor.dev/gvisor/test/packetimpact/testbench" -) - -func init() { - testbench.RegisterFlags(flag.CommandLine) -} - -func TestUDPRecvMulticast(t *testing.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 := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) - defer conn.Close() - conn.SendIP(testbench.IPv4{DstAddr: testbench.Address(tcpip.Address(net.ParseIP("224.0.0.1").To4()))}, testbench.UDP{}) - 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 deleted file mode 100644 index 224feef85..000000000 --- a/test/packetimpact/tests/udp_send_recv_dgram_test.go +++ /dev/null @@ -1,90 +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 udp_send_recv_dgram_test - -import ( - "flag" - "net" - "testing" - "time" - - "golang.org/x/sys/unix" - "gvisor.dev/gvisor/test/packetimpact/testbench" -) - -func init() { - testbench.RegisterFlags(flag.CommandLine) -} - -func TestUDPRecv(t *testing.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 := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) - defer conn.Close() - - testCases := []struct { - name string - payload []byte - }{ - {"emptypayload", nil}, - {"small payload", []byte("hello world")}, - {"1kPayload", testbench.GenerateRandomPayload(t, 1<<10)}, - // Even though UDP allows larger dgrams we don't test it here as - // they need to be fragmented and written out as individual - // frames. - } - for _, tc := range testCases { - t.Run(tc.name, func(t *testing.T) { - conn.Send(testbench.UDP{}, &testbench.Payload{Bytes: tc.payload}) - if got, want := string(dut.Recv(boundFD, int32(len(tc.payload)), 0)), string(tc.payload); got != want { - t.Fatalf("received payload does not match sent payload got: %s, want: %s", got, want) - } - }) - } -} - -func TestUDPSend(t *testing.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 := testbench.NewUDPIPv4(t, testbench.UDP{DstPort: &remotePort}, testbench.UDP{SrcPort: &remotePort}) - defer conn.Close() - - testCases := []struct { - name string - payload []byte - }{ - {"emptypayload", nil}, - {"small payload", []byte("hello world")}, - {"1kPayload", testbench.GenerateRandomPayload(t, 1<<10)}, - // Even though UDP allows larger dgrams we don't test it here as - // they need to be fragmented and written out as individual - // frames. - } - for _, tc := range testCases { - t.Run(tc.name, func(t *testing.T) { - conn.Drain() - if got, want := int(dut.SendTo(boundFD, tc.payload, 0, conn.LocalAddr())), len(tc.payload); got != want { - t.Fatalf("short write got: %d, want: %d", got, want) - } - if _, err := conn.ExpectData(testbench.UDP{SrcPort: &remotePort}, testbench.Payload{Bytes: tc.payload}, 1*time.Second); err != nil { - t.Fatal(err) - } - }) - } -} |