730 lines
16 KiB
Go
730 lines
16 KiB
Go
// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package net
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import (
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"fmt"
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"internal/testenv"
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"io"
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"reflect"
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"runtime"
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"sync"
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"testing"
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"time"
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)
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func BenchmarkTCP4OneShot(b *testing.B) {
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benchmarkTCP(b, false, false, "127.0.0.1:0")
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}
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func BenchmarkTCP4OneShotTimeout(b *testing.B) {
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benchmarkTCP(b, false, true, "127.0.0.1:0")
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}
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func BenchmarkTCP4Persistent(b *testing.B) {
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benchmarkTCP(b, true, false, "127.0.0.1:0")
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}
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func BenchmarkTCP4PersistentTimeout(b *testing.B) {
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benchmarkTCP(b, true, true, "127.0.0.1:0")
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}
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func BenchmarkTCP6OneShot(b *testing.B) {
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if !supportsIPv6() {
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b.Skip("ipv6 is not supported")
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}
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benchmarkTCP(b, false, false, "[::1]:0")
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}
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func BenchmarkTCP6OneShotTimeout(b *testing.B) {
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if !supportsIPv6() {
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b.Skip("ipv6 is not supported")
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}
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benchmarkTCP(b, false, true, "[::1]:0")
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}
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func BenchmarkTCP6Persistent(b *testing.B) {
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if !supportsIPv6() {
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b.Skip("ipv6 is not supported")
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}
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benchmarkTCP(b, true, false, "[::1]:0")
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}
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func BenchmarkTCP6PersistentTimeout(b *testing.B) {
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if !supportsIPv6() {
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b.Skip("ipv6 is not supported")
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}
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benchmarkTCP(b, true, true, "[::1]:0")
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}
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func benchmarkTCP(b *testing.B, persistent, timeout bool, laddr string) {
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testHookUninstaller.Do(uninstallTestHooks)
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const msgLen = 512
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conns := b.N
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numConcurrent := runtime.GOMAXPROCS(-1) * 2
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msgs := 1
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if persistent {
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conns = numConcurrent
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msgs = b.N / conns
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if msgs == 0 {
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msgs = 1
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}
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if conns > b.N {
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conns = b.N
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}
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}
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sendMsg := func(c Conn, buf []byte) bool {
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n, err := c.Write(buf)
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if n != len(buf) || err != nil {
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b.Log(err)
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return false
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}
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return true
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}
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recvMsg := func(c Conn, buf []byte) bool {
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for read := 0; read != len(buf); {
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n, err := c.Read(buf)
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read += n
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if err != nil {
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b.Log(err)
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return false
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}
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}
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return true
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}
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ln, err := Listen("tcp", laddr)
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if err != nil {
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b.Fatal(err)
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}
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defer ln.Close()
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serverSem := make(chan bool, numConcurrent)
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// Acceptor.
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go func() {
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for {
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c, err := ln.Accept()
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if err != nil {
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break
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}
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serverSem <- true
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// Server connection.
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go func(c Conn) {
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defer func() {
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c.Close()
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<-serverSem
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}()
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if timeout {
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c.SetDeadline(time.Now().Add(time.Hour)) // Not intended to fire.
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}
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var buf [msgLen]byte
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for m := 0; m < msgs; m++ {
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if !recvMsg(c, buf[:]) || !sendMsg(c, buf[:]) {
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break
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}
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}
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}(c)
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}
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}()
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clientSem := make(chan bool, numConcurrent)
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for i := 0; i < conns; i++ {
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clientSem <- true
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// Client connection.
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go func() {
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defer func() {
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<-clientSem
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}()
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c, err := Dial("tcp", ln.Addr().String())
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if err != nil {
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b.Log(err)
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return
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}
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defer c.Close()
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if timeout {
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c.SetDeadline(time.Now().Add(time.Hour)) // Not intended to fire.
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}
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var buf [msgLen]byte
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for m := 0; m < msgs; m++ {
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if !sendMsg(c, buf[:]) || !recvMsg(c, buf[:]) {
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break
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}
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}
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}()
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}
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for i := 0; i < numConcurrent; i++ {
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clientSem <- true
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serverSem <- true
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}
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}
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func BenchmarkTCP4ConcurrentReadWrite(b *testing.B) {
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benchmarkTCPConcurrentReadWrite(b, "127.0.0.1:0")
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}
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func BenchmarkTCP6ConcurrentReadWrite(b *testing.B) {
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if !supportsIPv6() {
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b.Skip("ipv6 is not supported")
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}
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benchmarkTCPConcurrentReadWrite(b, "[::1]:0")
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}
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func benchmarkTCPConcurrentReadWrite(b *testing.B, laddr string) {
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testHookUninstaller.Do(uninstallTestHooks)
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// The benchmark creates GOMAXPROCS client/server pairs.
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// Each pair creates 4 goroutines: client reader/writer and server reader/writer.
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// The benchmark stresses concurrent reading and writing to the same connection.
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// Such pattern is used in net/http and net/rpc.
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b.StopTimer()
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P := runtime.GOMAXPROCS(0)
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N := b.N / P
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W := 1000
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// Setup P client/server connections.
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clients := make([]Conn, P)
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servers := make([]Conn, P)
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ln, err := Listen("tcp", laddr)
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if err != nil {
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b.Fatal(err)
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}
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defer ln.Close()
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done := make(chan bool)
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go func() {
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for p := 0; p < P; p++ {
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s, err := ln.Accept()
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if err != nil {
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b.Error(err)
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return
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}
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servers[p] = s
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}
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done <- true
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}()
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for p := 0; p < P; p++ {
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c, err := Dial("tcp", ln.Addr().String())
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if err != nil {
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b.Fatal(err)
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}
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clients[p] = c
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}
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<-done
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b.StartTimer()
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var wg sync.WaitGroup
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wg.Add(4 * P)
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for p := 0; p < P; p++ {
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// Client writer.
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go func(c Conn) {
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defer wg.Done()
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var buf [1]byte
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for i := 0; i < N; i++ {
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v := byte(i)
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for w := 0; w < W; w++ {
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v *= v
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}
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buf[0] = v
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_, err := c.Write(buf[:])
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if err != nil {
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b.Error(err)
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return
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}
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}
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}(clients[p])
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// Pipe between server reader and server writer.
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pipe := make(chan byte, 128)
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// Server reader.
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go func(s Conn) {
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defer wg.Done()
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var buf [1]byte
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for i := 0; i < N; i++ {
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_, err := s.Read(buf[:])
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if err != nil {
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b.Error(err)
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return
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}
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pipe <- buf[0]
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}
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}(servers[p])
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// Server writer.
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go func(s Conn) {
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defer wg.Done()
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var buf [1]byte
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for i := 0; i < N; i++ {
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v := <-pipe
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for w := 0; w < W; w++ {
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v *= v
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}
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buf[0] = v
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_, err := s.Write(buf[:])
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if err != nil {
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b.Error(err)
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return
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}
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}
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s.Close()
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}(servers[p])
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// Client reader.
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go func(c Conn) {
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defer wg.Done()
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var buf [1]byte
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for i := 0; i < N; i++ {
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_, err := c.Read(buf[:])
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if err != nil {
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b.Error(err)
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return
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}
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}
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c.Close()
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}(clients[p])
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}
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wg.Wait()
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}
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type resolveTCPAddrTest struct {
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network string
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litAddrOrName string
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addr *TCPAddr
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err error
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}
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var resolveTCPAddrTests = []resolveTCPAddrTest{
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{"tcp", "127.0.0.1:0", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil},
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{"tcp4", "127.0.0.1:65535", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 65535}, nil},
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{"tcp", "[::1]:0", &TCPAddr{IP: ParseIP("::1"), Port: 0}, nil},
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{"tcp6", "[::1]:65535", &TCPAddr{IP: ParseIP("::1"), Port: 65535}, nil},
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{"tcp", "[::1%en0]:1", &TCPAddr{IP: ParseIP("::1"), Port: 1, Zone: "en0"}, nil},
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{"tcp6", "[::1%911]:2", &TCPAddr{IP: ParseIP("::1"), Port: 2, Zone: "911"}, nil},
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{"", "127.0.0.1:0", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil}, // Go 1.0 behavior
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{"", "[::1]:0", &TCPAddr{IP: ParseIP("::1"), Port: 0}, nil}, // Go 1.0 behavior
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{"tcp", ":12345", &TCPAddr{Port: 12345}, nil},
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{"http", "127.0.0.1:0", nil, UnknownNetworkError("http")},
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{"tcp", "127.0.0.1:http", &TCPAddr{IP: ParseIP("127.0.0.1"), Port: 80}, nil},
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{"tcp", "[::ffff:127.0.0.1]:http", &TCPAddr{IP: ParseIP("::ffff:127.0.0.1"), Port: 80}, nil},
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{"tcp", "[2001:db8::1]:http", &TCPAddr{IP: ParseIP("2001:db8::1"), Port: 80}, nil},
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{"tcp4", "127.0.0.1:http", &TCPAddr{IP: ParseIP("127.0.0.1"), Port: 80}, nil},
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{"tcp4", "[::ffff:127.0.0.1]:http", &TCPAddr{IP: ParseIP("127.0.0.1"), Port: 80}, nil},
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{"tcp6", "[2001:db8::1]:http", &TCPAddr{IP: ParseIP("2001:db8::1"), Port: 80}, nil},
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{"tcp4", "[2001:db8::1]:http", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "2001:db8::1"}},
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{"tcp6", "127.0.0.1:http", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "127.0.0.1"}},
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{"tcp6", "[::ffff:127.0.0.1]:http", nil, &AddrError{Err: errNoSuitableAddress.Error(), Addr: "::ffff:127.0.0.1"}},
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}
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func TestResolveTCPAddr(t *testing.T) {
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origTestHookLookupIP := testHookLookupIP
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defer func() { testHookLookupIP = origTestHookLookupIP }()
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testHookLookupIP = lookupLocalhost
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for _, tt := range resolveTCPAddrTests {
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addr, err := ResolveTCPAddr(tt.network, tt.litAddrOrName)
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if !reflect.DeepEqual(addr, tt.addr) || !reflect.DeepEqual(err, tt.err) {
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t.Errorf("ResolveTCPAddr(%q, %q) = %#v, %v, want %#v, %v", tt.network, tt.litAddrOrName, addr, err, tt.addr, tt.err)
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continue
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}
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if err == nil {
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addr2, err := ResolveTCPAddr(addr.Network(), addr.String())
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if !reflect.DeepEqual(addr2, tt.addr) || err != tt.err {
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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)
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}
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}
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}
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}
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var tcpListenerNameTests = []struct {
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net string
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laddr *TCPAddr
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}{
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{"tcp4", &TCPAddr{IP: IPv4(127, 0, 0, 1)}},
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{"tcp4", &TCPAddr{}},
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{"tcp4", nil},
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}
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func TestTCPListenerName(t *testing.T) {
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testenv.MustHaveExternalNetwork(t)
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for _, tt := range tcpListenerNameTests {
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ln, err := ListenTCP(tt.net, tt.laddr)
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if err != nil {
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t.Fatal(err)
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}
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defer ln.Close()
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la := ln.Addr()
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if a, ok := la.(*TCPAddr); !ok || a.Port == 0 {
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t.Fatalf("got %v; expected a proper address with non-zero port number", la)
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}
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}
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}
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func TestIPv6LinkLocalUnicastTCP(t *testing.T) {
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testenv.MustHaveExternalNetwork(t)
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if !supportsIPv6() {
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t.Skip("IPv6 is not supported")
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}
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for i, tt := range ipv6LinkLocalUnicastTCPTests {
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ln, err := Listen(tt.network, tt.address)
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if err != nil {
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// It might return "LookupHost returned no
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// suitable address" error on some platforms.
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t.Log(err)
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continue
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}
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ls, err := (&streamListener{Listener: ln}).newLocalServer()
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if err != nil {
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t.Fatal(err)
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}
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defer ls.teardown()
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ch := make(chan error, 1)
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handler := func(ls *localServer, ln Listener) { transponder(ln, ch) }
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if err := ls.buildup(handler); err != nil {
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t.Fatal(err)
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}
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if la, ok := ln.Addr().(*TCPAddr); !ok || !tt.nameLookup && la.Zone == "" {
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t.Fatalf("got %v; expected a proper address with zone identifier", la)
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}
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c, err := Dial(tt.network, ls.Listener.Addr().String())
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if err != nil {
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t.Fatal(err)
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}
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defer c.Close()
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if la, ok := c.LocalAddr().(*TCPAddr); !ok || !tt.nameLookup && la.Zone == "" {
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t.Fatalf("got %v; expected a proper address with zone identifier", la)
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}
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if ra, ok := c.RemoteAddr().(*TCPAddr); !ok || !tt.nameLookup && ra.Zone == "" {
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t.Fatalf("got %v; expected a proper address with zone identifier", ra)
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}
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if _, err := c.Write([]byte("TCP OVER IPV6 LINKLOCAL TEST")); err != nil {
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t.Fatal(err)
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}
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b := make([]byte, 32)
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if _, err := c.Read(b); err != nil {
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t.Fatal(err)
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}
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for err := range ch {
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t.Errorf("#%d: %v", i, err)
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}
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}
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}
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func TestTCPConcurrentAccept(t *testing.T) {
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defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(4))
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ln, err := Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatal(err)
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}
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const N = 10
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var wg sync.WaitGroup
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wg.Add(N)
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for i := 0; i < N; i++ {
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go func() {
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for {
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c, err := ln.Accept()
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if err != nil {
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break
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}
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c.Close()
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}
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wg.Done()
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}()
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}
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attempts := 10 * N
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fails := 0
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d := &Dialer{Timeout: 200 * time.Millisecond}
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for i := 0; i < attempts; i++ {
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c, err := d.Dial("tcp", ln.Addr().String())
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if err != nil {
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fails++
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} else {
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c.Close()
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}
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}
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ln.Close()
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wg.Wait()
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if fails > attempts/9 { // see issues 7400 and 7541
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t.Fatalf("too many Dial failed: %v", fails)
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}
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if fails > 0 {
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t.Logf("# of failed Dials: %v", fails)
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}
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}
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func TestTCPReadWriteAllocs(t *testing.T) {
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if runtime.Compiler == "gccgo" {
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t.Skip("skipping for gccgo until escape analysis is enabled")
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}
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switch runtime.GOOS {
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case "plan9":
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// The implementation of asynchronous cancelable
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// I/O on Plan 9 allocates memory.
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// See net/fd_io_plan9.go.
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t.Skipf("not supported on %s", runtime.GOOS)
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case "nacl":
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// NaCl needs to allocate pseudo file descriptor
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// stuff. See syscall/fd_nacl.go.
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t.Skipf("not supported on %s", runtime.GOOS)
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}
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ln, err := Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatal(err)
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}
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defer ln.Close()
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var server Conn
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errc := make(chan error, 1)
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go func() {
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var err error
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server, err = ln.Accept()
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errc <- err
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}()
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client, err := Dial("tcp", ln.Addr().String())
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if err != nil {
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t.Fatal(err)
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}
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defer client.Close()
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if err := <-errc; err != nil {
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t.Fatal(err)
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}
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defer server.Close()
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var buf [128]byte
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allocs := testing.AllocsPerRun(1000, func() {
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_, err := server.Write(buf[:])
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if err != nil {
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t.Fatal(err)
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}
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_, err = io.ReadFull(client, buf[:])
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if err != nil {
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t.Fatal(err)
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}
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})
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// For gccgo changed "> 0" to "> 7".
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if allocs > 7 {
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t.Fatalf("got %v; want 0", allocs)
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}
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var bufwrt [128]byte
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ch := make(chan bool)
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defer close(ch)
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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, err := newLocalListener("tcp")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
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", "dragonfly", "freebsd", "netbsd", "openbsd", "plan9", "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, err := newLocalListener("tcp")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
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
|
|
})
|
|
}
|
|
}
|