591 lines
13 KiB
Go
591 lines
13 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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"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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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.Logf("Write failed: %v", 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.Logf("Read failed: %v", 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.Fatalf("Listen failed: %v", err)
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}
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defer ln.Close()
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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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// Server connection.
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go func(c Conn) {
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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 !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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sem := make(chan bool, numConcurrent)
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for i := 0; i < conns; i++ {
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sem <- true
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// Client connection.
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go func() {
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defer func() {
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<-sem
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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.Logf("Dial failed: %v", 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 < cap(sem); i++ {
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sem <- 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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// 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.Fatalf("Listen failed: %v", 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.Fatalf("Accept failed: %v", err)
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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.Fatalf("Dial failed: %v", 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.Fatalf("Write failed: %v", err)
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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.Fatalf("Read failed: %v", err)
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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.Fatalf("Write failed: %v", err)
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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.Fatalf("Read failed: %v", err)
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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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net 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]:1", &TCPAddr{IP: ParseIP("::1"), Port: 1}, nil},
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{"tcp6", "[::1]:65534", &TCPAddr{IP: ParseIP("::1"), Port: 65534}, 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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}
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func init() {
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if ifi := loopbackInterface(); ifi != nil {
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index := fmt.Sprintf("%v", ifi.Index)
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resolveTCPAddrTests = append(resolveTCPAddrTests, []resolveTCPAddrTest{
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{"tcp6", "[fe80::1%" + ifi.Name + "]:3", &TCPAddr{IP: ParseIP("fe80::1"), Port: 3, Zone: zoneToString(ifi.Index)}, nil},
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{"tcp6", "[fe80::1%" + index + "]:4", &TCPAddr{IP: ParseIP("fe80::1"), Port: 4, Zone: index}, nil},
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}...)
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}
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if ips, err := LookupIP("localhost"); err == nil && len(ips) > 1 && supportsIPv4 && supportsIPv6 {
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resolveTCPAddrTests = append(resolveTCPAddrTests, []resolveTCPAddrTest{
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{"tcp", "localhost:5", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 5}, nil},
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{"tcp4", "localhost:6", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 6}, nil},
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{"tcp6", "localhost:7", &TCPAddr{IP: IPv6loopback, Port: 7}, nil},
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}...)
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}
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}
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func TestResolveTCPAddr(t *testing.T) {
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for _, tt := range resolveTCPAddrTests {
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addr, err := ResolveTCPAddr(tt.net, tt.litAddrOrName)
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if err != tt.err {
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t.Fatalf("ResolveTCPAddr(%q, %q) failed: %v", tt.net, tt.litAddrOrName, err)
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}
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if !reflect.DeepEqual(addr, tt.addr) {
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t.Fatalf("ResolveTCPAddr(%q, %q) = %#v, want %#v", tt.net, tt.litAddrOrName, addr, tt.addr)
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}
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if err == nil {
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str := addr.String()
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addr1, err := ResolveTCPAddr(tt.net, str)
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if err != nil {
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t.Fatalf("ResolveTCPAddr(%q, %q) [from %q]: %v", tt.net, str, tt.litAddrOrName, err)
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}
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if !reflect.DeepEqual(addr1, addr) {
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t.Fatalf("ResolveTCPAddr(%q, %q) [from %q] = %#v, want %#v", tt.net, str, tt.litAddrOrName, addr1, addr)
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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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if testing.Short() || !*testExternal {
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t.Skip("skipping test to avoid external network")
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}
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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.Fatalf("ListenTCP failed: %v", 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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if testing.Short() || !*testExternal {
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t.Skip("skipping test to avoid external network")
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}
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if !supportsIPv6 {
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t.Skip("ipv6 is not supported")
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}
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ifi := loopbackInterface()
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if ifi == nil {
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t.Skip("loopback interface not found")
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}
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laddr := ipv6LinkLocalUnicastAddr(ifi)
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if laddr == "" {
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t.Skip("ipv6 unicast address on loopback not found")
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}
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type test struct {
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net, addr string
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nameLookup bool
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}
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var tests = []test{
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{"tcp", "[" + laddr + "%" + ifi.Name + "]:0", false},
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{"tcp6", "[" + laddr + "%" + ifi.Name + "]:0", false},
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}
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switch runtime.GOOS {
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case "darwin", "freebsd", "opensbd", "netbsd":
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tests = append(tests, []test{
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{"tcp", "[localhost%" + ifi.Name + "]:0", true},
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{"tcp6", "[localhost%" + ifi.Name + "]:0", true},
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}...)
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case "linux":
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tests = append(tests, []test{
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{"tcp", "[ip6-localhost%" + ifi.Name + "]:0", true},
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{"tcp6", "[ip6-localhost%" + ifi.Name + "]:0", true},
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}...)
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}
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for _, tt := range tests {
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ln, err := Listen(tt.net, tt.addr)
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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.Logf("Listen failed: %v", err)
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continue
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}
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defer ln.Close()
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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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done := make(chan int)
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go transponder(t, ln, done)
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c, err := Dial(tt.net, ln.Addr().String())
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if err != nil {
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t.Fatalf("Dial failed: %v", 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.Fatalf("Conn.Write failed: %v", 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.Fatalf("Conn.Read failed: %v", err)
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}
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<-done
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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.Fatalf("Listen failed: %v", 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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for i := 0; i < 10*N; i++ {
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c, err := Dial("tcp", ln.Addr().String())
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if err != nil {
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t.Fatalf("Dial failed: %v", err)
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}
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c.Close()
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}
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ln.Close()
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wg.Wait()
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}
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func TestTCPReadWriteMallocs(t *testing.T) {
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if testing.Short() {
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t.Skip("skipping malloc count in short mode")
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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.Fatalf("Listen failed: %v", 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)
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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.Fatalf("Dial failed: %v", err)
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}
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if err := <-errc; err != nil {
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t.Fatalf("Accept failed: %v", err)
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}
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defer server.Close()
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var buf [128]byte
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mallocs := testing.AllocsPerRun(1000, func() {
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_, err := server.Write(buf[:])
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if err != nil {
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t.Fatalf("Write failed: %v", 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.Fatalf("Read failed: %v", err)
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}
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})
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if mallocs > 0 {
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t.Fatalf("Got %v allocs, want 0", mallocs)
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}
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}
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func TestTCPStress(t *testing.T) {
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const conns = 2
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const msgLen = 512
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msgs := int(1e4)
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if testing.Short() {
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msgs = 1e2
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}
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|
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
|
|
}
|
|
}
|