| // Copyright 2012 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| //go:build !js |
| |
| package net |
| |
| import ( |
| "fmt" |
| "internal/testenv" |
| "io" |
| "os" |
| "reflect" |
| "runtime" |
| "sync" |
| "testing" |
| "time" |
| ) |
| |
| func BenchmarkTCP4OneShot(b *testing.B) { |
| benchmarkTCP(b, false, false, "127.0.0.1:0") |
| } |
| |
| func BenchmarkTCP4OneShotTimeout(b *testing.B) { |
| benchmarkTCP(b, false, true, "127.0.0.1:0") |
| } |
| |
| func BenchmarkTCP4Persistent(b *testing.B) { |
| benchmarkTCP(b, true, false, "127.0.0.1:0") |
| } |
| |
| func BenchmarkTCP4PersistentTimeout(b *testing.B) { |
| benchmarkTCP(b, true, true, "127.0.0.1:0") |
| } |
| |
| func BenchmarkTCP6OneShot(b *testing.B) { |
| if !supportsIPv6() { |
| b.Skip("ipv6 is not supported") |
| } |
| benchmarkTCP(b, false, false, "[::1]:0") |
| } |
| |
| func BenchmarkTCP6OneShotTimeout(b *testing.B) { |
| if !supportsIPv6() { |
| b.Skip("ipv6 is not supported") |
| } |
| benchmarkTCP(b, false, true, "[::1]:0") |
| } |
| |
| func BenchmarkTCP6Persistent(b *testing.B) { |
| if !supportsIPv6() { |
| b.Skip("ipv6 is not supported") |
| } |
| benchmarkTCP(b, true, false, "[::1]:0") |
| } |
| |
| func BenchmarkTCP6PersistentTimeout(b *testing.B) { |
| if !supportsIPv6() { |
| b.Skip("ipv6 is not supported") |
| } |
| benchmarkTCP(b, true, true, "[::1]:0") |
| } |
| |
| func benchmarkTCP(b *testing.B, persistent, timeout bool, laddr string) { |
| testHookUninstaller.Do(uninstallTestHooks) |
| |
| const msgLen = 512 |
| conns := b.N |
| numConcurrent := runtime.GOMAXPROCS(-1) * 2 |
| msgs := 1 |
| if persistent { |
| conns = numConcurrent |
| msgs = b.N / conns |
| if msgs == 0 { |
| msgs = 1 |
| } |
| if conns > b.N { |
| conns = b.N |
| } |
| } |
| sendMsg := func(c Conn, buf []byte) bool { |
| n, err := c.Write(buf) |
| if n != len(buf) || err != nil { |
| b.Log(err) |
| return false |
| } |
| return true |
| } |
| recvMsg := func(c Conn, buf []byte) bool { |
| for read := 0; read != len(buf); { |
| n, err := c.Read(buf) |
| read += n |
| if err != nil { |
| b.Log(err) |
| return false |
| } |
| } |
| return true |
| } |
| ln, err := Listen("tcp", laddr) |
| if err != nil { |
| b.Fatal(err) |
| } |
| defer ln.Close() |
| serverSem := make(chan bool, numConcurrent) |
| // Acceptor. |
| go func() { |
| for { |
| c, err := ln.Accept() |
| if err != nil { |
| break |
| } |
| serverSem <- true |
| // Server connection. |
| go func(c Conn) { |
| defer func() { |
| c.Close() |
| <-serverSem |
| }() |
| if timeout { |
| c.SetDeadline(time.Now().Add(time.Hour)) // Not intended to fire. |
| } |
| var buf [msgLen]byte |
| for m := 0; m < msgs; m++ { |
| if !recvMsg(c, buf[:]) || !sendMsg(c, buf[:]) { |
| break |
| } |
| } |
| }(c) |
| } |
| }() |
| clientSem := make(chan bool, numConcurrent) |
| for i := 0; i < conns; i++ { |
| clientSem <- true |
| // Client connection. |
| go func() { |
| defer func() { |
| <-clientSem |
| }() |
| c, err := Dial("tcp", ln.Addr().String()) |
| if err != nil { |
| b.Log(err) |
| return |
| } |
| defer c.Close() |
| if timeout { |
| c.SetDeadline(time.Now().Add(time.Hour)) // Not intended to fire. |
| } |
| var buf [msgLen]byte |
| for m := 0; m < msgs; m++ { |
| if !sendMsg(c, buf[:]) || !recvMsg(c, buf[:]) { |
| break |
| } |
| } |
| }() |
| } |
| for i := 0; i < numConcurrent; i++ { |
| clientSem <- true |
| serverSem <- true |
| } |
| } |
| |
| func BenchmarkTCP4ConcurrentReadWrite(b *testing.B) { |
| benchmarkTCPConcurrentReadWrite(b, "127.0.0.1:0") |
| } |
| |
| func BenchmarkTCP6ConcurrentReadWrite(b *testing.B) { |
| if !supportsIPv6() { |
| b.Skip("ipv6 is not supported") |
| } |
| benchmarkTCPConcurrentReadWrite(b, "[::1]:0") |
| } |
| |
| func benchmarkTCPConcurrentReadWrite(b *testing.B, laddr string) { |
| testHookUninstaller.Do(uninstallTestHooks) |
| |
| // The benchmark creates GOMAXPROCS client/server pairs. |
| // Each pair creates 4 goroutines: client reader/writer and server reader/writer. |
| // The benchmark stresses concurrent reading and writing to the same connection. |
| // Such pattern is used in net/http and net/rpc. |
| |
| b.StopTimer() |
| |
| P := runtime.GOMAXPROCS(0) |
| N := b.N / P |
| W := 1000 |
| |
| // Setup P client/server connections. |
| clients := make([]Conn, P) |
| servers := make([]Conn, P) |
| ln, err := Listen("tcp", laddr) |
| if err != nil { |
| b.Fatal(err) |
| } |
| defer ln.Close() |
| done := make(chan bool) |
| go func() { |
| for p := 0; p < P; p++ { |
| s, err := ln.Accept() |
| if err != nil { |
| b.Error(err) |
| return |
| } |
| servers[p] = s |
| } |
| done <- true |
| }() |
| for p := 0; p < P; p++ { |
| c, err := Dial("tcp", ln.Addr().String()) |
| if err != nil { |
| b.Fatal(err) |
| } |
| clients[p] = c |
| } |
| <-done |
| |
| b.StartTimer() |
| |
| var wg sync.WaitGroup |
| wg.Add(4 * P) |
| for p := 0; p < P; p++ { |
| // Client writer. |
| go func(c Conn) { |
| defer wg.Done() |
| var buf [1]byte |
| for i := 0; i < N; i++ { |
| v := byte(i) |
| for w := 0; w < W; w++ { |
| v *= v |
| } |
| buf[0] = v |
| _, err := c.Write(buf[:]) |
| if err != nil { |
| b.Error(err) |
| return |
| } |
| } |
| }(clients[p]) |
| |
| // Pipe between server reader and server writer. |
| pipe := make(chan byte, 128) |
| |
| // Server reader. |
| go func(s Conn) { |
| defer wg.Done() |
| var buf [1]byte |
| for i := 0; i < N; i++ { |
| _, err := s.Read(buf[:]) |
| if err != nil { |
| b.Error(err) |
| return |
| } |
| pipe <- buf[0] |
| } |
| }(servers[p]) |
| |
| // Server writer. |
| go func(s Conn) { |
| defer wg.Done() |
| var buf [1]byte |
| for i := 0; i < N; i++ { |
| v := <-pipe |
| for w := 0; w < W; w++ { |
| v *= v |
| } |
| buf[0] = v |
| _, err := s.Write(buf[:]) |
| if err != nil { |
| b.Error(err) |
| return |
| } |
| } |
| s.Close() |
| }(servers[p]) |
| |
| // Client reader. |
| go func(c Conn) { |
| defer wg.Done() |
| var buf [1]byte |
| for i := 0; i < N; i++ { |
| _, err := c.Read(buf[:]) |
| if err != nil { |
| b.Error(err) |
| return |
| } |
| } |
| c.Close() |
| }(clients[p]) |
| } |
| wg.Wait() |
| } |
| |
| type resolveTCPAddrTest struct { |
| network string |
| litAddrOrName string |
| addr *TCPAddr |
| err error |
| } |
| |
| var resolveTCPAddrTests = []resolveTCPAddrTest{ |
| {"tcp", "127.0.0.1:0", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil}, |
| {"tcp4", "127.0.0.1:65535", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 65535}, nil}, |
| |
| {"tcp", "[::1]:0", &TCPAddr{IP: ParseIP("::1"), Port: 0}, nil}, |
| {"tcp6", "[::1]:65535", &TCPAddr{IP: ParseIP("::1"), Port: 65535}, nil}, |
| |
| {"tcp", "[::1%en0]:1", &TCPAddr{IP: ParseIP("::1"), Port: 1, Zone: "en0"}, nil}, |
| {"tcp6", "[::1%911]:2", &TCPAddr{IP: ParseIP("::1"), Port: 2, Zone: "911"}, nil}, |
| |
| {"", "127.0.0.1:0", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil}, // Go 1.0 behavior |
| {"", "[::1]:0", &TCPAddr{IP: ParseIP("::1"), Port: 0}, nil}, // Go 1.0 behavior |
| |
| {"tcp", ":12345", &TCPAddr{Port: 12345}, nil}, |
| |
| {"http", "127.0.0.1:0", nil, UnknownNetworkError("http")}, |
| |
| {"tcp", "127.0.0.1:http", &TCPAddr{IP: ParseIP("127.0.0.1"), Port: 80}, nil}, |
| {"tcp", "[::ffff:127.0.0.1]:http", &TCPAddr{IP: ParseIP("::ffff:127.0.0.1"), Port: 80}, nil}, |
| {"tcp", "[2001:db8::1]:http", &TCPAddr{IP: ParseIP("2001:db8::1"), Port: 80}, nil}, |
| {"tcp4", "127.0.0.1:http", &TCPAddr{IP: ParseIP("127.0.0.1"), Port: 80}, nil}, |
| {"tcp4", "[::ffff:127.0.0.1]:http", &TCPAddr{IP: ParseIP("127.0.0.1"), Port: 80}, nil}, |
| {"tcp6", "[2001:db8::1]:http", &TCPAddr{IP: ParseIP("2001:db8::1"), Port: 80}, nil}, |
| |
| {"tcp4", "[2001:db8::1]:http", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "2001:db8::1"}}, |
| {"tcp6", "127.0.0.1:http", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "127.0.0.1"}}, |
| {"tcp6", "[::ffff:127.0.0.1]:http", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "::ffff:127.0.0.1"}}, |
| } |
| |
| func TestResolveTCPAddr(t *testing.T) { |
| origTestHookLookupIP := testHookLookupIP |
| defer func() { testHookLookupIP = origTestHookLookupIP }() |
| testHookLookupIP = lookupLocalhost |
| |
| for _, tt := range resolveTCPAddrTests { |
| addr, err := ResolveTCPAddr(tt.network, tt.litAddrOrName) |
| if !reflect.DeepEqual(addr, tt.addr) || !reflect.DeepEqual(err, tt.err) { |
| t.Errorf("ResolveTCPAddr(%q, %q) = %#v, %v, want %#v, %v", tt.network, tt.litAddrOrName, addr, err, tt.addr, tt.err) |
| continue |
| } |
| if err == nil { |
| addr2, err := ResolveTCPAddr(addr.Network(), addr.String()) |
| if !reflect.DeepEqual(addr2, tt.addr) || err != tt.err { |
| 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) |
| } |
| } |
| } |
| } |
| |
| var tcpListenerNameTests = []struct { |
| net string |
| laddr *TCPAddr |
| }{ |
| {"tcp4", &TCPAddr{IP: IPv4(127, 0, 0, 1)}}, |
| {"tcp4", &TCPAddr{}}, |
| {"tcp4", nil}, |
| } |
| |
| func TestTCPListenerName(t *testing.T) { |
| testenv.MustHaveExternalNetwork(t) |
| |
| for _, tt := range tcpListenerNameTests { |
| ln, err := ListenTCP(tt.net, tt.laddr) |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer ln.Close() |
| la := ln.Addr() |
| if a, ok := la.(*TCPAddr); !ok || a.Port == 0 { |
| t.Fatalf("got %v; expected a proper address with non-zero port number", la) |
| } |
| } |
| } |
| |
| func TestIPv6LinkLocalUnicastTCP(t *testing.T) { |
| testenv.MustHaveExternalNetwork(t) |
| |
| if !supportsIPv6() { |
| t.Skip("IPv6 is not supported") |
| } |
| |
| for i, tt := range ipv6LinkLocalUnicastTCPTests { |
| ln, err := Listen(tt.network, tt.address) |
| if err != nil { |
| // It might return "LookupHost returned no |
| // suitable address" error on some platforms. |
| t.Log(err) |
| continue |
| } |
| ls := (&streamListener{Listener: ln}).newLocalServer() |
| defer ls.teardown() |
| ch := make(chan error, 1) |
| handler := func(ls *localServer, ln Listener) { ls.transponder(ln, ch) } |
| if err := ls.buildup(handler); err != nil { |
| t.Fatal(err) |
| } |
| if la, ok := ln.Addr().(*TCPAddr); !ok || !tt.nameLookup && la.Zone == "" { |
| t.Fatalf("got %v; expected a proper address with zone identifier", la) |
| } |
| |
| c, err := Dial(tt.network, ls.Listener.Addr().String()) |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer c.Close() |
| if la, ok := c.LocalAddr().(*TCPAddr); !ok || !tt.nameLookup && la.Zone == "" { |
| t.Fatalf("got %v; expected a proper address with zone identifier", la) |
| } |
| if ra, ok := c.RemoteAddr().(*TCPAddr); !ok || !tt.nameLookup && ra.Zone == "" { |
| t.Fatalf("got %v; expected a proper address with zone identifier", ra) |
| } |
| |
| if _, err := c.Write([]byte("TCP OVER IPV6 LINKLOCAL TEST")); err != nil { |
| t.Fatal(err) |
| } |
| b := make([]byte, 32) |
| if _, err := c.Read(b); err != nil { |
| t.Fatal(err) |
| } |
| |
| for err := range ch { |
| t.Errorf("#%d: %v", i, err) |
| } |
| } |
| } |
| |
| func TestTCPConcurrentAccept(t *testing.T) { |
| defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(4)) |
| ln, err := Listen("tcp", "127.0.0.1:0") |
| if err != nil { |
| t.Fatal(err) |
| } |
| const N = 10 |
| var wg sync.WaitGroup |
| wg.Add(N) |
| for i := 0; i < N; i++ { |
| go func() { |
| for { |
| c, err := ln.Accept() |
| if err != nil { |
| break |
| } |
| c.Close() |
| } |
| wg.Done() |
| }() |
| } |
| attempts := 10 * N |
| fails := 0 |
| d := &Dialer{Timeout: 200 * time.Millisecond} |
| for i := 0; i < attempts; i++ { |
| c, err := d.Dial("tcp", ln.Addr().String()) |
| if err != nil { |
| fails++ |
| } else { |
| c.Close() |
| } |
| } |
| ln.Close() |
| wg.Wait() |
| if fails > attempts/9 { // see issues 7400 and 7541 |
| t.Fatalf("too many Dial failed: %v", fails) |
| } |
| if fails > 0 { |
| t.Logf("# of failed Dials: %v", fails) |
| } |
| } |
| |
| func TestTCPReadWriteAllocs(t *testing.T) { |
| if runtime.Compiler == "gccgo" { |
| t.Skip("skipping for gccgo until escape analysis is enabled") |
| } |
| |
| switch runtime.GOOS { |
| case "plan9": |
| // The implementation of asynchronous cancelable |
| // I/O on Plan 9 allocates memory. |
| // See net/fd_io_plan9.go. |
| t.Skipf("not supported on %s", runtime.GOOS) |
| } |
| |
| ln, err := Listen("tcp", "127.0.0.1:0") |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer ln.Close() |
| var server Conn |
| errc := make(chan error, 1) |
| go func() { |
| var err error |
| server, err = ln.Accept() |
| errc <- err |
| }() |
| client, err := Dial("tcp", ln.Addr().String()) |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer client.Close() |
| if err := <-errc; err != nil { |
| t.Fatal(err) |
| } |
| defer server.Close() |
| |
| var buf [128]byte |
| allocs := testing.AllocsPerRun(1000, func() { |
| _, err := server.Write(buf[:]) |
| if err != nil { |
| t.Fatal(err) |
| } |
| _, err = io.ReadFull(client, buf[:]) |
| if err != nil { |
| t.Fatal(err) |
| } |
| }) |
| // For gccgo changed "> 0" to "> 7". |
| if allocs > 7 { |
| t.Fatalf("got %v; want 0", allocs) |
| } |
| |
| var bufwrt [128]byte |
| ch := make(chan bool) |
| defer close(ch) |
| go func() { |
| for <-ch { |
| _, err := server.Write(bufwrt[:]) |
| errc <- err |
| } |
| }() |
| allocs = testing.AllocsPerRun(1000, func() { |
| ch <- true |
| if _, err = io.ReadFull(client, buf[:]); err != nil { |
| t.Fatal(err) |
| } |
| if err := <-errc; err != nil { |
| t.Fatal(err) |
| } |
| }) |
| if allocs > 0 { |
| t.Fatalf("got %v; want 0", allocs) |
| } |
| } |
| |
| func TestTCPStress(t *testing.T) { |
| const conns = 2 |
| const msgLen = 512 |
| msgs := int(1e4) |
| if testing.Short() { |
| msgs = 1e2 |
| } |
| |
| sendMsg := func(c Conn, buf []byte) bool { |
| n, err := c.Write(buf) |
| if n != len(buf) || err != nil { |
| t.Log(err) |
| return false |
| } |
| return true |
| } |
| recvMsg := func(c Conn, buf []byte) bool { |
| for read := 0; read != len(buf); { |
| n, err := c.Read(buf) |
| read += n |
| if err != nil { |
| t.Log(err) |
| return false |
| } |
| } |
| return true |
| } |
| |
| ln, err := Listen("tcp", "127.0.0.1:0") |
| if err != nil { |
| t.Fatal(err) |
| } |
| done := make(chan bool) |
| // Acceptor. |
| go func() { |
| defer func() { |
| done <- true |
| }() |
| for { |
| c, err := ln.Accept() |
| if err != nil { |
| break |
| } |
| // Server connection. |
| go func(c Conn) { |
| defer c.Close() |
| var buf [msgLen]byte |
| for m := 0; m < msgs; m++ { |
| if !recvMsg(c, buf[:]) || !sendMsg(c, buf[:]) { |
| break |
| } |
| } |
| }(c) |
| } |
| }() |
| for i := 0; i < conns; i++ { |
| // Client connection. |
| go func() { |
| defer func() { |
| done <- true |
| }() |
| c, err := Dial("tcp", ln.Addr().String()) |
| if err != nil { |
| t.Log(err) |
| return |
| } |
| defer c.Close() |
| var buf [msgLen]byte |
| for m := 0; m < msgs; m++ { |
| if !sendMsg(c, buf[:]) || !recvMsg(c, buf[:]) { |
| break |
| } |
| } |
| }() |
| } |
| for i := 0; i < conns; i++ { |
| <-done |
| } |
| ln.Close() |
| <-done |
| } |
| |
| func TestTCPSelfConnect(t *testing.T) { |
| if runtime.GOOS == "windows" { |
| // TODO(brainman): do not know why it hangs. |
| t.Skip("known-broken test on windows") |
| } |
| |
| ln := newLocalListener(t, "tcp") |
| var d Dialer |
| c, err := d.Dial(ln.Addr().Network(), ln.Addr().String()) |
| if err != nil { |
| ln.Close() |
| t.Fatal(err) |
| } |
| network := c.LocalAddr().Network() |
| laddr := *c.LocalAddr().(*TCPAddr) |
| c.Close() |
| ln.Close() |
| |
| // Try to connect to that address repeatedly. |
| n := 100000 |
| if testing.Short() { |
| n = 1000 |
| } |
| switch runtime.GOOS { |
| case "darwin", "ios", "dragonfly", "freebsd", "netbsd", "openbsd", "plan9", "illumos", "solaris", "windows": |
| // Non-Linux systems take a long time to figure |
| // out that there is nothing listening on localhost. |
| n = 100 |
| } |
| for i := 0; i < n; i++ { |
| d.Timeout = time.Millisecond |
| c, err := d.Dial(network, laddr.String()) |
| if err == nil { |
| addr := c.LocalAddr().(*TCPAddr) |
| if addr.Port == laddr.Port || addr.IP.Equal(laddr.IP) { |
| t.Errorf("Dial %v should fail", addr) |
| } else { |
| t.Logf("Dial %v succeeded - possibly racing with other listener", addr) |
| } |
| c.Close() |
| } |
| } |
| } |
| |
| // Test that >32-bit reads work on 64-bit systems. |
| // On 32-bit systems this tests that maxint reads work. |
| func TestTCPBig(t *testing.T) { |
| if !*testTCPBig { |
| t.Skip("test disabled; use -tcpbig to enable") |
| } |
| |
| for _, writev := range []bool{false, true} { |
| t.Run(fmt.Sprintf("writev=%v", writev), func(t *testing.T) { |
| ln := newLocalListener(t, "tcp") |
| defer ln.Close() |
| |
| x := int(1 << 30) |
| x = x*5 + 1<<20 // just over 5 GB on 64-bit, just over 1GB on 32-bit |
| done := make(chan int) |
| go func() { |
| defer close(done) |
| c, err := ln.Accept() |
| if err != nil { |
| t.Error(err) |
| return |
| } |
| buf := make([]byte, x) |
| var n int |
| if writev { |
| var n64 int64 |
| n64, err = (&Buffers{buf}).WriteTo(c) |
| n = int(n64) |
| } else { |
| n, err = c.Write(buf) |
| } |
| if n != len(buf) || err != nil { |
| t.Errorf("Write(buf) = %d, %v, want %d, nil", n, err, x) |
| } |
| c.Close() |
| }() |
| |
| c, err := Dial("tcp", ln.Addr().String()) |
| if err != nil { |
| t.Fatal(err) |
| } |
| buf := make([]byte, x) |
| n, err := io.ReadFull(c, buf) |
| if n != len(buf) || err != nil { |
| t.Errorf("Read(buf) = %d, %v, want %d, nil", n, err, x) |
| } |
| c.Close() |
| <-done |
| }) |
| } |
| } |
| |
| func TestCopyPipeIntoTCP(t *testing.T) { |
| ln := newLocalListener(t, "tcp") |
| defer ln.Close() |
| |
| errc := make(chan error, 1) |
| defer func() { |
| if err := <-errc; err != nil { |
| t.Error(err) |
| } |
| }() |
| go func() { |
| c, err := ln.Accept() |
| if err != nil { |
| errc <- err |
| return |
| } |
| defer c.Close() |
| |
| buf := make([]byte, 100) |
| n, err := io.ReadFull(c, buf) |
| if err != io.ErrUnexpectedEOF || n != 2 { |
| errc <- fmt.Errorf("got err=%q n=%v; want err=%q n=2", err, n, io.ErrUnexpectedEOF) |
| return |
| } |
| |
| errc <- nil |
| }() |
| |
| c, err := Dial("tcp", ln.Addr().String()) |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer c.Close() |
| |
| r, w, err := os.Pipe() |
| if err != nil { |
| t.Fatal(err) |
| } |
| defer r.Close() |
| |
| errc2 := make(chan error, 1) |
| defer func() { |
| if err := <-errc2; err != nil { |
| t.Error(err) |
| } |
| }() |
| |
| defer w.Close() |
| |
| go func() { |
| _, err := io.Copy(c, r) |
| errc2 <- err |
| }() |
| |
| // Split write into 2 packets. That makes Windows TransmitFile |
| // drop second packet. |
| packet := make([]byte, 1) |
| _, err = w.Write(packet) |
| if err != nil { |
| t.Fatal(err) |
| } |
| time.Sleep(100 * time.Millisecond) |
| _, err = w.Write(packet) |
| if err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| func BenchmarkSetReadDeadline(b *testing.B) { |
| ln := newLocalListener(b, "tcp") |
| defer ln.Close() |
| var serv Conn |
| done := make(chan error) |
| go func() { |
| var err error |
| serv, err = ln.Accept() |
| done <- err |
| }() |
| c, err := Dial("tcp", ln.Addr().String()) |
| if err != nil { |
| b.Fatal(err) |
| } |
| defer c.Close() |
| if err := <-done; err != nil { |
| b.Fatal(err) |
| } |
| defer serv.Close() |
| c.SetWriteDeadline(time.Now().Add(2 * time.Hour)) |
| deadline := time.Now().Add(time.Hour) |
| b.ResetTimer() |
| for i := 0; i < b.N; i++ { |
| c.SetReadDeadline(deadline) |
| deadline = deadline.Add(1) |
| } |
| } |
