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-rw-r--r--src/net/tcp_test.go611
1 files changed, 611 insertions, 0 deletions
diff --git a/src/net/tcp_test.go b/src/net/tcp_test.go
new file mode 100644
index 000000000..c04198ea0
--- /dev/null
+++ b/src/net/tcp_test.go
@@ -0,0 +1,611 @@
+// 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.
+
+package net
+
+import (
+ "fmt"
+ "io"
+ "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) {
+ 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.Logf("Write failed: %v", 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.Logf("Read failed: %v", err)
+ return false
+ }
+ }
+ return true
+ }
+ ln, err := Listen("tcp", laddr)
+ if err != nil {
+ b.Fatalf("Listen failed: %v", 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.Logf("Dial failed: %v", 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) {
+ // 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.Fatalf("Listen failed: %v", err)
+ }
+ defer ln.Close()
+ done := make(chan bool)
+ go func() {
+ for p := 0; p < P; p++ {
+ s, err := ln.Accept()
+ if err != nil {
+ b.Errorf("Accept failed: %v", err)
+ return
+ }
+ servers[p] = s
+ }
+ done <- true
+ }()
+ for p := 0; p < P; p++ {
+ c, err := Dial("tcp", ln.Addr().String())
+ if err != nil {
+ b.Fatalf("Dial failed: %v", 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.Errorf("Write failed: %v", 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.Errorf("Read failed: %v", 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.Errorf("Write failed: %v", 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.Errorf("Read failed: %v", err)
+ return
+ }
+ }
+ c.Close()
+ }(clients[p])
+ }
+ wg.Wait()
+}
+
+type resolveTCPAddrTest struct {
+ net 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]:1", &TCPAddr{IP: ParseIP("::1"), Port: 1}, nil},
+ {"tcp6", "[::1]:65534", &TCPAddr{IP: ParseIP("::1"), Port: 65534}, 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")},
+}
+
+func init() {
+ if ifi := loopbackInterface(); ifi != nil {
+ index := fmt.Sprintf("%v", ifi.Index)
+ resolveTCPAddrTests = append(resolveTCPAddrTests, []resolveTCPAddrTest{
+ {"tcp6", "[fe80::1%" + ifi.Name + "]:3", &TCPAddr{IP: ParseIP("fe80::1"), Port: 3, Zone: zoneToString(ifi.Index)}, nil},
+ {"tcp6", "[fe80::1%" + index + "]:4", &TCPAddr{IP: ParseIP("fe80::1"), Port: 4, Zone: index}, nil},
+ }...)
+ }
+ if ips, err := LookupIP("localhost"); err == nil && len(ips) > 1 && supportsIPv4 && supportsIPv6 {
+ resolveTCPAddrTests = append(resolveTCPAddrTests, []resolveTCPAddrTest{
+ {"tcp", "localhost:5", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 5}, nil},
+ {"tcp4", "localhost:6", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 6}, nil},
+ {"tcp6", "localhost:7", &TCPAddr{IP: IPv6loopback, Port: 7}, nil},
+ }...)
+ }
+}
+
+func TestResolveTCPAddr(t *testing.T) {
+ for _, tt := range resolveTCPAddrTests {
+ addr, err := ResolveTCPAddr(tt.net, tt.litAddrOrName)
+ if err != tt.err {
+ t.Fatalf("ResolveTCPAddr(%q, %q) failed: %v", tt.net, tt.litAddrOrName, err)
+ }
+ if !reflect.DeepEqual(addr, tt.addr) {
+ t.Fatalf("ResolveTCPAddr(%q, %q) = %#v, want %#v", tt.net, tt.litAddrOrName, addr, tt.addr)
+ }
+ if err == nil {
+ str := addr.String()
+ addr1, err := ResolveTCPAddr(tt.net, str)
+ if err != nil {
+ t.Fatalf("ResolveTCPAddr(%q, %q) [from %q]: %v", tt.net, str, tt.litAddrOrName, err)
+ }
+ if !reflect.DeepEqual(addr1, addr) {
+ t.Fatalf("ResolveTCPAddr(%q, %q) [from %q] = %#v, want %#v", tt.net, str, tt.litAddrOrName, addr1, addr)
+ }
+ }
+ }
+}
+
+var tcpListenerNameTests = []struct {
+ net string
+ laddr *TCPAddr
+}{
+ {"tcp4", &TCPAddr{IP: IPv4(127, 0, 0, 1)}},
+ {"tcp4", &TCPAddr{}},
+ {"tcp4", nil},
+}
+
+func TestTCPListenerName(t *testing.T) {
+ if testing.Short() || !*testExternal {
+ t.Skip("skipping test to avoid external network")
+ }
+
+ for _, tt := range tcpListenerNameTests {
+ ln, err := ListenTCP(tt.net, tt.laddr)
+ if err != nil {
+ t.Fatalf("ListenTCP failed: %v", 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) {
+ if testing.Short() || !*testExternal {
+ t.Skip("skipping test to avoid external network")
+ }
+ if !supportsIPv6 {
+ t.Skip("ipv6 is not supported")
+ }
+ ifi := loopbackInterface()
+ if ifi == nil {
+ t.Skip("loopback interface not found")
+ }
+ laddr := ipv6LinkLocalUnicastAddr(ifi)
+ if laddr == "" {
+ t.Skip("ipv6 unicast address on loopback not found")
+ }
+
+ type test struct {
+ net, addr string
+ nameLookup bool
+ }
+ var tests = []test{
+ {"tcp", "[" + laddr + "%" + ifi.Name + "]:0", false},
+ {"tcp6", "[" + laddr + "%" + ifi.Name + "]:0", false},
+ }
+ switch runtime.GOOS {
+ case "darwin", "freebsd", "openbsd", "netbsd":
+ tests = append(tests, []test{
+ {"tcp", "[localhost%" + ifi.Name + "]:0", true},
+ {"tcp6", "[localhost%" + ifi.Name + "]:0", true},
+ }...)
+ case "linux":
+ tests = append(tests, []test{
+ {"tcp", "[ip6-localhost%" + ifi.Name + "]:0", true},
+ {"tcp6", "[ip6-localhost%" + ifi.Name + "]:0", true},
+ }...)
+ }
+ for _, tt := range tests {
+ ln, err := Listen(tt.net, tt.addr)
+ if err != nil {
+ // It might return "LookupHost returned no
+ // suitable address" error on some platforms.
+ t.Logf("Listen failed: %v", err)
+ continue
+ }
+ defer ln.Close()
+ if la, ok := ln.Addr().(*TCPAddr); !ok || !tt.nameLookup && la.Zone == "" {
+ t.Fatalf("got %v; expected a proper address with zone identifier", la)
+ }
+
+ done := make(chan int)
+ go transponder(t, ln, done)
+
+ c, err := Dial(tt.net, ln.Addr().String())
+ if err != nil {
+ t.Fatalf("Dial failed: %v", 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.Fatalf("Conn.Write failed: %v", err)
+ }
+ b := make([]byte, 32)
+ if _, err := c.Read(b); err != nil {
+ t.Fatalf("Conn.Read failed: %v", err)
+ }
+
+ <-done
+ }
+}
+
+func TestTCPConcurrentAccept(t *testing.T) {
+ defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(4))
+ ln, err := Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.Fatalf("Listen failed: %v", 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 TestTCPReadWriteMallocs(t *testing.T) {
+ if testing.Short() {
+ t.Skip("skipping malloc count in short mode")
+ }
+ ln, err := Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.Fatalf("Listen failed: %v", err)
+ }
+ defer ln.Close()
+ var server Conn
+ errc := make(chan error)
+ go func() {
+ var err error
+ server, err = ln.Accept()
+ errc <- err
+ }()
+ client, err := Dial("tcp", ln.Addr().String())
+ if err != nil {
+ t.Fatalf("Dial failed: %v", err)
+ }
+ if err := <-errc; err != nil {
+ t.Fatalf("Accept failed: %v", err)
+ }
+ defer server.Close()
+ var buf [128]byte
+ mallocs := testing.AllocsPerRun(1000, func() {
+ _, err := server.Write(buf[:])
+ if err != nil {
+ t.Fatalf("Write failed: %v", err)
+ }
+ _, err = io.ReadFull(client, buf[:])
+ if err != nil {
+ t.Fatalf("Read failed: %v", err)
+ }
+ })
+ if mallocs > 0 {
+ t.Fatalf("Got %v allocs, want 0", mallocs)
+ }
+}
+
+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.Logf("Write failed: %v", 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.Logf("Read failed: %v", err)
+ return false
+ }
+ }
+ return true
+ }
+
+ ln, err := Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.Fatalf("Listen failed: %v", err)
+ }
+ defer ln.Close()
+ // Acceptor.
+ go func() {
+ 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)
+ }
+ }()
+ done := make(chan bool)
+ 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.Logf("Dial failed: %v", 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
+ }
+}
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