1 // Copyright 2012 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
21 func BenchmarkTCP4OneShot(b *testing.B) {
22 benchmarkTCP(b, false, false, "127.0.0.1:0")
25 func BenchmarkTCP4OneShotTimeout(b *testing.B) {
26 benchmarkTCP(b, false, true, "127.0.0.1:0")
29 func BenchmarkTCP4Persistent(b *testing.B) {
30 benchmarkTCP(b, true, false, "127.0.0.1:0")
33 func BenchmarkTCP4PersistentTimeout(b *testing.B) {
34 benchmarkTCP(b, true, true, "127.0.0.1:0")
37 func BenchmarkTCP6OneShot(b *testing.B) {
39 b.Skip("ipv6 is not supported")
41 benchmarkTCP(b, false, false, "[::1]:0")
44 func BenchmarkTCP6OneShotTimeout(b *testing.B) {
46 b.Skip("ipv6 is not supported")
48 benchmarkTCP(b, false, true, "[::1]:0")
51 func BenchmarkTCP6Persistent(b *testing.B) {
53 b.Skip("ipv6 is not supported")
55 benchmarkTCP(b, true, false, "[::1]:0")
58 func BenchmarkTCP6PersistentTimeout(b *testing.B) {
60 b.Skip("ipv6 is not supported")
62 benchmarkTCP(b, true, true, "[::1]:0")
65 func benchmarkTCP(b *testing.B, persistent, timeout bool, laddr string) {
66 testHookUninstaller.Do(uninstallTestHooks)
70 numConcurrent := runtime.GOMAXPROCS(-1) * 2
82 sendMsg := func(c Conn, buf []byte) bool {
83 n, err := c.Write(buf)
84 if n != len(buf) || err != nil {
90 recvMsg := func(c Conn, buf []byte) bool {
91 for read := 0; read != len(buf); {
101 ln, err := Listen("tcp", laddr)
106 serverSem := make(chan bool, numConcurrent)
110 c, err := ln.Accept()
115 // Server connection.
122 c.SetDeadline(time.Now().Add(time.Hour)) // Not intended to fire.
125 for m := 0; m < msgs; m++ {
126 if !recvMsg(c, buf[:]) || !sendMsg(c, buf[:]) {
133 clientSem := make(chan bool, numConcurrent)
134 for i := 0; i < conns; i++ {
136 // Client connection.
141 c, err := Dial("tcp", ln.Addr().String())
148 c.SetDeadline(time.Now().Add(time.Hour)) // Not intended to fire.
151 for m := 0; m < msgs; m++ {
152 if !sendMsg(c, buf[:]) || !recvMsg(c, buf[:]) {
158 for i := 0; i < numConcurrent; i++ {
164 func BenchmarkTCP4ConcurrentReadWrite(b *testing.B) {
165 benchmarkTCPConcurrentReadWrite(b, "127.0.0.1:0")
168 func BenchmarkTCP6ConcurrentReadWrite(b *testing.B) {
170 b.Skip("ipv6 is not supported")
172 benchmarkTCPConcurrentReadWrite(b, "[::1]:0")
175 func benchmarkTCPConcurrentReadWrite(b *testing.B, laddr string) {
176 testHookUninstaller.Do(uninstallTestHooks)
178 // The benchmark creates GOMAXPROCS client/server pairs.
179 // Each pair creates 4 goroutines: client reader/writer and server reader/writer.
180 // The benchmark stresses concurrent reading and writing to the same connection.
181 // Such pattern is used in net/http and net/rpc.
185 P := runtime.GOMAXPROCS(0)
189 // Setup P client/server connections.
190 clients := make([]Conn, P)
191 servers := make([]Conn, P)
192 ln, err := Listen("tcp", laddr)
197 done := make(chan bool)
199 for p := 0; p < P; p++ {
200 s, err := ln.Accept()
209 for p := 0; p < P; p++ {
210 c, err := Dial("tcp", ln.Addr().String())
220 var wg sync.WaitGroup
222 for p := 0; p < P; p++ {
227 for i := 0; i < N; i++ {
229 for w := 0; w < W; w++ {
233 _, err := c.Write(buf[:])
241 // Pipe between server reader and server writer.
242 pipe := make(chan byte, 128)
248 for i := 0; i < N; i++ {
249 _, err := s.Read(buf[:])
262 for i := 0; i < N; i++ {
264 for w := 0; w < W; w++ {
268 _, err := s.Write(buf[:])
281 for i := 0; i < N; i++ {
282 _, err := c.Read(buf[:])
294 type resolveTCPAddrTest struct {
301 var resolveTCPAddrTests = []resolveTCPAddrTest{
302 {"tcp", "127.0.0.1:0", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil},
303 {"tcp4", "127.0.0.1:65535", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 65535}, nil},
305 {"tcp", "[::1]:0", &TCPAddr{IP: ParseIP("::1"), Port: 0}, nil},
306 {"tcp6", "[::1]:65535", &TCPAddr{IP: ParseIP("::1"), Port: 65535}, nil},
308 {"tcp", "[::1%en0]:1", &TCPAddr{IP: ParseIP("::1"), Port: 1, Zone: "en0"}, nil},
309 {"tcp6", "[::1%911]:2", &TCPAddr{IP: ParseIP("::1"), Port: 2, Zone: "911"}, nil},
311 {"", "127.0.0.1:0", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil}, // Go 1.0 behavior
312 {"", "[::1]:0", &TCPAddr{IP: ParseIP("::1"), Port: 0}, nil}, // Go 1.0 behavior
314 {"tcp", ":12345", &TCPAddr{Port: 12345}, nil},
316 {"http", "127.0.0.1:0", nil, UnknownNetworkError("http")},
318 {"tcp", "127.0.0.1:http", &TCPAddr{IP: ParseIP("127.0.0.1"), Port: 80}, nil},
319 {"tcp", "[::ffff:127.0.0.1]:http", &TCPAddr{IP: ParseIP("::ffff:127.0.0.1"), Port: 80}, nil},
320 {"tcp", "[2001:db8::1]:http", &TCPAddr{IP: ParseIP("2001:db8::1"), Port: 80}, nil},
321 {"tcp4", "127.0.0.1:http", &TCPAddr{IP: ParseIP("127.0.0.1"), Port: 80}, nil},
322 {"tcp4", "[::ffff:127.0.0.1]:http", &TCPAddr{IP: ParseIP("127.0.0.1"), Port: 80}, nil},
323 {"tcp6", "[2001:db8::1]:http", &TCPAddr{IP: ParseIP("2001:db8::1"), Port: 80}, nil},
325 {"tcp4", "[2001:db8::1]:http", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "2001:db8::1"}},
326 {"tcp6", "127.0.0.1:http", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "127.0.0.1"}},
327 {"tcp6", "[::ffff:127.0.0.1]:http", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "::ffff:127.0.0.1"}},
330 func TestResolveTCPAddr(t *testing.T) {
331 origTestHookLookupIP := testHookLookupIP
332 defer func() { testHookLookupIP = origTestHookLookupIP }()
333 testHookLookupIP = lookupLocalhost
335 for _, tt := range resolveTCPAddrTests {
336 addr, err := ResolveTCPAddr(tt.network, tt.litAddrOrName)
337 if !reflect.DeepEqual(addr, tt.addr) || !reflect.DeepEqual(err, tt.err) {
338 t.Errorf("ResolveTCPAddr(%q, %q) = %#v, %v, want %#v, %v", tt.network, tt.litAddrOrName, addr, err, tt.addr, tt.err)
342 addr2, err := ResolveTCPAddr(addr.Network(), addr.String())
343 if !reflect.DeepEqual(addr2, tt.addr) || err != tt.err {
344 t.Errorf("(%q, %q): ResolveTCPAddr(%q, %q) = %#v, %v, want %#v, %v", tt.network, tt.litAddrOrName, addr.Network(), addr.String(), addr2, err, tt.addr, tt.err)
350 var tcpListenerNameTests = []struct {
354 {"tcp4", &TCPAddr{IP: IPv4(127, 0, 0, 1)}},
355 {"tcp4", &TCPAddr{}},
359 func TestTCPListenerName(t *testing.T) {
360 testenv.MustHaveExternalNetwork(t)
362 for _, tt := range tcpListenerNameTests {
363 ln, err := ListenTCP(tt.net, tt.laddr)
369 if a, ok := la.(*TCPAddr); !ok || a.Port == 0 {
370 t.Fatalf("got %v; expected a proper address with non-zero port number", la)
375 func TestIPv6LinkLocalUnicastTCP(t *testing.T) {
376 testenv.MustHaveExternalNetwork(t)
379 t.Skip("IPv6 is not supported")
382 for i, tt := range ipv6LinkLocalUnicastTCPTests {
383 ln, err := Listen(tt.network, tt.address)
385 // It might return "LookupHost returned no
386 // suitable address" error on some platforms.
390 ls, err := (&streamListener{Listener: ln}).newLocalServer()
395 ch := make(chan error, 1)
396 handler := func(ls *localServer, ln Listener) { transponder(ln, ch) }
397 if err := ls.buildup(handler); err != nil {
400 if la, ok := ln.Addr().(*TCPAddr); !ok || !tt.nameLookup && la.Zone == "" {
401 t.Fatalf("got %v; expected a proper address with zone identifier", la)
404 c, err := Dial(tt.network, ls.Listener.Addr().String())
409 if la, ok := c.LocalAddr().(*TCPAddr); !ok || !tt.nameLookup && la.Zone == "" {
410 t.Fatalf("got %v; expected a proper address with zone identifier", la)
412 if ra, ok := c.RemoteAddr().(*TCPAddr); !ok || !tt.nameLookup && ra.Zone == "" {
413 t.Fatalf("got %v; expected a proper address with zone identifier", ra)
416 if _, err := c.Write([]byte("TCP OVER IPV6 LINKLOCAL TEST")); err != nil {
419 b := make([]byte, 32)
420 if _, err := c.Read(b); err != nil {
424 for err := range ch {
425 t.Errorf("#%d: %v", i, err)
430 func TestTCPConcurrentAccept(t *testing.T) {
431 defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(4))
432 ln, err := Listen("tcp", "127.0.0.1:0")
437 var wg sync.WaitGroup
439 for i := 0; i < N; i++ {
442 c, err := ln.Accept()
453 d := &Dialer{Timeout: 200 * time.Millisecond}
454 for i := 0; i < attempts; i++ {
455 c, err := d.Dial("tcp", ln.Addr().String())
464 if fails > attempts/9 { // see issues 7400 and 7541
465 t.Fatalf("too many Dial failed: %v", fails)
468 t.Logf("# of failed Dials: %v", fails)
472 func TestTCPReadWriteAllocs(t *testing.T) {
473 if runtime.Compiler == "gccgo" {
474 t.Skip("skipping for gccgo until escape analysis is enabled")
477 switch runtime.GOOS {
479 // The implementation of asynchronous cancelable
480 // I/O on Plan 9 allocates memory.
481 // See net/fd_io_plan9.go.
482 t.Skipf("not supported on %s", runtime.GOOS)
484 // NaCl needs to allocate pseudo file descriptor
485 // stuff. See syscall/fd_nacl.go.
486 t.Skipf("not supported on %s", runtime.GOOS)
489 ln, err := Listen("tcp", "127.0.0.1:0")
495 errc := make(chan error, 1)
498 server, err = ln.Accept()
501 client, err := Dial("tcp", ln.Addr().String())
506 if err := <-errc; err != nil {
512 allocs := testing.AllocsPerRun(1000, func() {
513 _, err := server.Write(buf[:])
517 _, err = io.ReadFull(client, buf[:])
522 // For gccgo changed "> 0" to "> 7".
524 t.Fatalf("got %v; want 0", allocs)
528 ch := make(chan bool)
532 _, err := server.Write(bufwrt[:])
536 allocs = testing.AllocsPerRun(1000, func() {
538 if _, err = io.ReadFull(client, buf[:]); err != nil {
541 if err := <-errc; err != nil {
546 t.Fatalf("got %v; want 0", allocs)
550 func TestTCPStress(t *testing.T) {
558 sendMsg := func(c Conn, buf []byte) bool {
559 n, err := c.Write(buf)
560 if n != len(buf) || err != nil {
566 recvMsg := func(c Conn, buf []byte) bool {
567 for read := 0; read != len(buf); {
568 n, err := c.Read(buf)
578 ln, err := Listen("tcp", "127.0.0.1:0")
582 done := make(chan bool)
589 c, err := ln.Accept()
593 // Server connection.
597 for m := 0; m < msgs; m++ {
598 if !recvMsg(c, buf[:]) || !sendMsg(c, buf[:]) {
605 for i := 0; i < conns; i++ {
606 // Client connection.
611 c, err := Dial("tcp", ln.Addr().String())
618 for m := 0; m < msgs; m++ {
619 if !sendMsg(c, buf[:]) || !recvMsg(c, buf[:]) {
625 for i := 0; i < conns; i++ {
632 func TestTCPSelfConnect(t *testing.T) {
633 if runtime.GOOS == "windows" {
634 // TODO(brainman): do not know why it hangs.
635 t.Skip("known-broken test on windows")
638 ln, err := newLocalListener("tcp")
643 c, err := d.Dial(ln.Addr().Network(), ln.Addr().String())
648 network := c.LocalAddr().Network()
649 laddr := *c.LocalAddr().(*TCPAddr)
653 // Try to connect to that address repeatedly.
658 switch runtime.GOOS {
659 case "darwin", "dragonfly", "freebsd", "netbsd", "openbsd", "plan9", "illumos", "solaris", "windows":
660 // Non-Linux systems take a long time to figure
661 // out that there is nothing listening on localhost.
664 for i := 0; i < n; i++ {
665 d.Timeout = time.Millisecond
666 c, err := d.Dial(network, laddr.String())
668 addr := c.LocalAddr().(*TCPAddr)
669 if addr.Port == laddr.Port || addr.IP.Equal(laddr.IP) {
670 t.Errorf("Dial %v should fail", addr)
672 t.Logf("Dial %v succeeded - possibly racing with other listener", addr)
679 // Test that >32-bit reads work on 64-bit systems.
680 // On 32-bit systems this tests that maxint reads work.
681 func TestTCPBig(t *testing.T) {
683 t.Skip("test disabled; use -tcpbig to enable")
686 for _, writev := range []bool{false, true} {
687 t.Run(fmt.Sprintf("writev=%v", writev), func(t *testing.T) {
688 ln, err := newLocalListener("tcp")
695 x = x*5 + 1<<20 // just over 5 GB on 64-bit, just over 1GB on 32-bit
696 done := make(chan int)
699 c, err := ln.Accept()
704 buf := make([]byte, x)
708 n64, err = (&Buffers{buf}).WriteTo(c)
711 n, err = c.Write(buf)
713 if n != len(buf) || err != nil {
714 t.Errorf("Write(buf) = %d, %v, want %d, nil", n, err, x)
719 c, err := Dial("tcp", ln.Addr().String())
723 buf := make([]byte, x)
724 n, err := io.ReadFull(c, buf)
725 if n != len(buf) || err != nil {
726 t.Errorf("Read(buf) = %d, %v, want %d, nil", n, err, x)
734 func TestCopyPipeIntoTCP(t *testing.T) {
735 ln, err := newLocalListener("tcp")
741 errc := make(chan error, 1)
743 if err := <-errc; err != nil {
748 c, err := ln.Accept()
755 buf := make([]byte, 100)
756 n, err := io.ReadFull(c, buf)
757 if err != io.ErrUnexpectedEOF || n != 2 {
758 errc <- fmt.Errorf("got err=%q n=%v; want err=%q n=2", err, n, io.ErrUnexpectedEOF)
765 c, err := Dial("tcp", ln.Addr().String())
771 r, w, err := os.Pipe()
777 errc2 := make(chan error, 1)
779 if err := <-errc2; err != nil {
787 _, err := io.Copy(c, r)
791 // Split write into 2 packets. That makes Windows TransmitFile
792 // drop second packet.
793 packet := make([]byte, 1)
794 _, err = w.Write(packet)
798 time.Sleep(100 * time.Millisecond)
799 _, err = w.Write(packet)
805 func BenchmarkSetReadDeadline(b *testing.B) {
806 ln, err := newLocalListener("tcp")
812 done := make(chan error)
815 serv, err = ln.Accept()
818 c, err := Dial("tcp", ln.Addr().String())
823 if err := <-done; err != nil {
827 c.SetWriteDeadline(time.Now().Add(2 * time.Hour))
828 deadline := time.Now().Add(time.Hour)
830 for i := 0; i < b.N; i++ {
831 c.SetReadDeadline(deadline)
832 deadline = deadline.Add(1)