From a9b47390c821942d60784e308f681f213645049c Mon Sep 17 00:00:00 2001
From: Zeling Feng <zeling@google.com>
Date: Fri, 29 May 2020 17:22:56 -0700
Subject: Test TCP should queue RECEIVE request in SYN-SENT

PiperOrigin-RevId: 313878910
---
 test/packetimpact/tests/BUILD                      | 12 +++
 .../tests/tcp_queue_receive_in_syn_sent_test.go    | 87 ++++++++++++++++++++++
 2 files changed, 99 insertions(+)
 create mode 100644 test/packetimpact/tests/tcp_queue_receive_in_syn_sent_test.go

(limited to 'test/packetimpact/tests')

diff --git a/test/packetimpact/tests/BUILD b/test/packetimpact/tests/BUILD
index 9cd695200..1598c61e9 100644
--- a/test/packetimpact/tests/BUILD
+++ b/test/packetimpact/tests/BUILD
@@ -169,6 +169,18 @@ packetimpact_go_test(
     ],
 )
 
+packetimpact_go_test(
+    name = "tcp_queue_receive_in_syn_sent",
+    srcs = ["tcp_queue_receive_in_syn_sent_test.go"],
+    # TODO(b/157658105): Fix netstack then remove the line below.
+    expect_netstack_failure = True,
+    deps = [
+        "//pkg/tcpip/header",
+        "//test/packetimpact/testbench",
+        "@org_golang_x_sys//unix:go_default_library",
+    ],
+)
+
 packetimpact_go_test(
     name = "tcp_synsent_reset",
     srcs = ["tcp_synsent_reset_test.go"],
diff --git a/test/packetimpact/tests/tcp_queue_receive_in_syn_sent_test.go b/test/packetimpact/tests/tcp_queue_receive_in_syn_sent_test.go
new file mode 100644
index 000000000..5cc93fa24
--- /dev/null
+++ b/test/packetimpact/tests/tcp_queue_receive_in_syn_sent_test.go
@@ -0,0 +1,87 @@
+// Copyright 2020 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcp_queue_receive_in_syn_sent_test
+
+import (
+	"bytes"
+	"context"
+	"encoding/hex"
+	"errors"
+	"flag"
+	"net"
+	"sync"
+	"syscall"
+	"testing"
+	"time"
+
+	"golang.org/x/sys/unix"
+	"gvisor.dev/gvisor/pkg/tcpip/header"
+	tb "gvisor.dev/gvisor/test/packetimpact/testbench"
+)
+
+func init() {
+	tb.RegisterFlags(flag.CommandLine)
+}
+
+func TestQueueReceiveInSynSent(t *testing.T) {
+	dut := tb.NewDUT(t)
+	defer dut.TearDown()
+
+	socket, remotePort := dut.CreateBoundSocket(unix.SOCK_STREAM, unix.IPPROTO_TCP, net.ParseIP(tb.RemoteIPv4))
+	conn := tb.NewTCPIPv4(t, tb.TCP{DstPort: &remotePort}, tb.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(tb.TCP{Flags: tb.Uint8(header.TCPFlagSyn)}, time.Second); err != nil {
+		t.Fatalf("expected a SYN from DUT, but got none: %s", err)
+	}
+
+	// Issue RECEIVE call in SYN-SENT, this should be queued for process until the connection
+	// is established.
+	dut.SetNonBlocking(socket, false)
+	var wg sync.WaitGroup
+	defer wg.Wait()
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		ctx, cancel := context.WithTimeout(context.Background(), time.Second*3)
+		defer cancel()
+		n, buff, err := dut.RecvWithErrno(ctx, socket, int32(len(sampleData)), 0)
+		if n == -1 {
+			t.Fatalf("failed to recv on DUT: %s", err)
+		}
+		if got := buff[:n]; !bytes.Equal(got, sampleData) {
+			t.Fatalf("received data don't match, got:\n%s, want:\n%s", hex.Dump(got), hex.Dump(sampleData))
+		}
+	}()
+
+	// The following sleep is used to prevent the connection from being established while the
+	// RPC is in flight.
+	time.Sleep(time.Second)
+
+	// Bring the connection to Established.
+	conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagSyn | header.TCPFlagAck)})
+	if _, err := conn.Expect(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}, time.Second); err != nil {
+		t.Fatalf("expected an ACK from DUT, but got none: %s", err)
+	}
+
+	// Send sample data to DUT.
+	conn.Send(tb.TCP{Flags: tb.Uint8(header.TCPFlagAck)}, &tb.Payload{Bytes: sampleData})
+}
-- 
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