519 lines
11 KiB
Go
519 lines
11 KiB
Go
// Copyright 2009 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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"errors"
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"fmt"
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"io"
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"net/internal/socktest"
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"os"
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"runtime"
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"testing"
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"time"
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)
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func TestCloseRead(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("not supported on %s", runtime.GOOS)
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}
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for _, network := range []string{"tcp", "unix", "unixpacket"} {
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if !testableNetwork(network) {
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t.Logf("skipping %s test", network)
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continue
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}
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ln, err := newLocalListener(network)
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if err != nil {
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t.Fatal(err)
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}
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switch network {
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case "unix", "unixpacket":
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defer os.Remove(ln.Addr().String())
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}
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defer ln.Close()
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c, err := Dial(ln.Addr().Network(), 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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switch network {
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case "unix", "unixpacket":
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defer os.Remove(c.LocalAddr().String())
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}
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defer c.Close()
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switch c := c.(type) {
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case *TCPConn:
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err = c.CloseRead()
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case *UnixConn:
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err = c.CloseRead()
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}
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if err != nil {
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if perr := parseCloseError(err, true); perr != nil {
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t.Error(perr)
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}
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t.Fatal(err)
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}
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var b [1]byte
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n, err := c.Read(b[:])
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if n != 0 || err == nil {
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t.Fatalf("got (%d, %v); want (0, error)", n, err)
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}
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}
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}
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func TestCloseWrite(t *testing.T) {
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switch runtime.GOOS {
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case "nacl", "plan9":
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t.Skipf("not supported on %s", runtime.GOOS)
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}
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handler := func(ls *localServer, ln Listener) {
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c, err := ln.Accept()
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if err != nil {
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t.Error(err)
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return
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}
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defer c.Close()
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var b [1]byte
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n, err := c.Read(b[:])
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if n != 0 || err != io.EOF {
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t.Errorf("got (%d, %v); want (0, io.EOF)", n, err)
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return
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}
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switch c := c.(type) {
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case *TCPConn:
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err = c.CloseWrite()
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case *UnixConn:
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err = c.CloseWrite()
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}
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if err != nil {
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if perr := parseCloseError(err, true); perr != nil {
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t.Error(perr)
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}
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t.Error(err)
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return
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}
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n, err = c.Write(b[:])
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if err == nil {
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t.Errorf("got (%d, %v); want (any, error)", n, err)
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return
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}
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}
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for _, network := range []string{"tcp", "unix", "unixpacket"} {
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if !testableNetwork(network) {
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t.Logf("skipping %s test", network)
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continue
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}
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ls, err := newLocalServer(network)
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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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if err := ls.buildup(handler); err != nil {
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t.Fatal(err)
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}
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c, err := Dial(ls.Listener.Addr().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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switch network {
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case "unix", "unixpacket":
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defer os.Remove(c.LocalAddr().String())
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}
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defer c.Close()
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switch c := c.(type) {
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case *TCPConn:
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err = c.CloseWrite()
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case *UnixConn:
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err = c.CloseWrite()
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}
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if err != nil {
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if perr := parseCloseError(err, true); perr != nil {
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t.Error(perr)
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}
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t.Fatal(err)
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}
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var b [1]byte
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n, err := c.Read(b[:])
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if n != 0 || err != io.EOF {
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t.Fatalf("got (%d, %v); want (0, io.EOF)", n, err)
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}
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n, err = c.Write(b[:])
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if err == nil {
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t.Fatalf("got (%d, %v); want (any, error)", n, err)
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}
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}
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}
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func TestConnClose(t *testing.T) {
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for _, network := range []string{"tcp", "unix", "unixpacket"} {
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if !testableNetwork(network) {
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t.Logf("skipping %s test", network)
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continue
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}
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ln, err := newLocalListener(network)
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if err != nil {
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t.Fatal(err)
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}
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switch network {
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case "unix", "unixpacket":
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defer os.Remove(ln.Addr().String())
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}
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defer ln.Close()
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c, err := Dial(ln.Addr().Network(), 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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switch network {
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case "unix", "unixpacket":
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defer os.Remove(c.LocalAddr().String())
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}
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defer c.Close()
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if err := c.Close(); err != nil {
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if perr := parseCloseError(err, false); perr != nil {
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t.Error(perr)
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}
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t.Fatal(err)
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}
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var b [1]byte
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n, err := c.Read(b[:])
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if n != 0 || err == nil {
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t.Fatalf("got (%d, %v); want (0, error)", n, err)
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}
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}
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}
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func TestListenerClose(t *testing.T) {
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for _, network := range []string{"tcp", "unix", "unixpacket"} {
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if !testableNetwork(network) {
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t.Logf("skipping %s test", network)
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continue
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}
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ln, err := newLocalListener(network)
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if err != nil {
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t.Fatal(err)
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}
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switch network {
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case "unix", "unixpacket":
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defer os.Remove(ln.Addr().String())
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}
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dst := ln.Addr().String()
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if err := ln.Close(); err != nil {
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if perr := parseCloseError(err, false); perr != nil {
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t.Error(perr)
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}
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t.Fatal(err)
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}
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c, err := ln.Accept()
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if err == nil {
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c.Close()
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t.Fatal("should fail")
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}
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if network == "tcp" {
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// We will have two TCP FSMs inside the
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// kernel here. There's no guarantee that a
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// signal comes from the far end FSM will be
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// delivered immediately to the near end FSM,
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// especially on the platforms that allow
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// multiple consumer threads to pull pending
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// established connections at the same time by
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// enabling SO_REUSEPORT option such as Linux,
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// DragonFly BSD. So we need to give some time
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// quantum to the kernel.
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//
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// Note that net.inet.tcp.reuseport_ext=1 by
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// default on DragonFly BSD.
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time.Sleep(time.Millisecond)
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cc, err := Dial("tcp", dst)
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if err == nil {
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t.Error("Dial to closed TCP listener succeeded.")
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cc.Close()
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}
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}
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}
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}
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func TestPacketConnClose(t *testing.T) {
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for _, network := range []string{"udp", "unixgram"} {
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if !testableNetwork(network) {
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t.Logf("skipping %s test", network)
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continue
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}
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c, err := newLocalPacketListener(network)
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if err != nil {
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t.Fatal(err)
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}
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switch network {
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case "unixgram":
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defer os.Remove(c.LocalAddr().String())
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}
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defer c.Close()
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if err := c.Close(); err != nil {
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if perr := parseCloseError(err, false); perr != nil {
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t.Error(perr)
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}
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t.Fatal(err)
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}
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var b [1]byte
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n, _, err := c.ReadFrom(b[:])
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if n != 0 || err == nil {
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t.Fatalf("got (%d, %v); want (0, error)", n, err)
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}
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}
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}
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// nacl was previous failing to reuse an address.
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func TestListenCloseListen(t *testing.T) {
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const maxTries = 10
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for tries := 0; tries < maxTries; tries++ {
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ln, err := newLocalListener("tcp")
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if err != nil {
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t.Fatal(err)
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}
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addr := ln.Addr().String()
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if err := ln.Close(); err != nil {
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if perr := parseCloseError(err, false); perr != nil {
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t.Error(perr)
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}
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t.Fatal(err)
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}
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ln, err = Listen("tcp", addr)
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if err == nil {
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// Success. nacl couldn't do this before.
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ln.Close()
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return
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}
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t.Errorf("failed on try %d/%d: %v", tries+1, maxTries, err)
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}
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t.Fatalf("failed to listen/close/listen on same address after %d tries", maxTries)
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}
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// See golang.org/issue/6163, golang.org/issue/6987.
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func TestAcceptIgnoreAbortedConnRequest(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("%s does not have full support of socktest", runtime.GOOS)
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}
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syserr := make(chan error)
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go func() {
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defer close(syserr)
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for _, err := range abortedConnRequestErrors {
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syserr <- err
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}
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}()
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sw.Set(socktest.FilterAccept, func(so *socktest.Status) (socktest.AfterFilter, error) {
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if err, ok := <-syserr; ok {
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return nil, err
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}
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return nil, nil
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})
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defer sw.Set(socktest.FilterAccept, nil)
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operr := make(chan error, 1)
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handler := func(ls *localServer, ln Listener) {
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defer close(operr)
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c, err := ln.Accept()
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if err != nil {
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if perr := parseAcceptError(err); perr != nil {
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operr <- perr
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}
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operr <- err
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return
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}
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c.Close()
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}
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ls, err := newLocalServer("tcp")
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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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if err := ls.buildup(handler); err != nil {
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t.Fatal(err)
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}
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c, err := Dial(ls.Listener.Addr().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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c.Close()
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for err := range operr {
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t.Error(err)
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}
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}
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func TestZeroByteRead(t *testing.T) {
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for _, network := range []string{"tcp", "unix", "unixpacket"} {
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if !testableNetwork(network) {
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t.Logf("skipping %s test", network)
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continue
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}
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ln, err := newLocalListener(network)
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if err != nil {
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t.Fatal(err)
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}
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connc := make(chan Conn, 1)
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go func() {
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defer ln.Close()
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c, err := ln.Accept()
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if err != nil {
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t.Error(err)
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}
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connc <- c // might be nil
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}()
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c, err := Dial(network, 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 c.Close()
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sc := <-connc
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if sc == nil {
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continue
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}
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defer sc.Close()
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if runtime.GOOS == "windows" {
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// A zero byte read on Windows caused a wait for readability first.
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// Rather than change that behavior, satisfy it in this test.
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// See Issue 15735.
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go io.WriteString(sc, "a")
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}
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n, err := c.Read(nil)
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if n != 0 || err != nil {
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t.Errorf("%s: zero byte client read = %v, %v; want 0, nil", network, n, err)
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}
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if runtime.GOOS == "windows" {
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// Same as comment above.
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go io.WriteString(c, "a")
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}
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n, err = sc.Read(nil)
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if n != 0 || err != nil {
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t.Errorf("%s: zero byte server read = %v, %v; want 0, nil", network, n, err)
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}
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}
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}
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// withTCPConnPair sets up a TCP connection between two peers, then
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// runs peer1 and peer2 concurrently. withTCPConnPair returns when
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// both have completed.
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func withTCPConnPair(t *testing.T, peer1, peer2 func(c *TCPConn) error) {
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ln, err := newLocalListener("tcp")
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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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errc := make(chan error, 2)
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go func() {
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c1, err := ln.Accept()
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if err != nil {
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errc <- err
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return
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}
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defer c1.Close()
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errc <- peer1(c1.(*TCPConn))
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}()
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go func() {
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c2, err := Dial("tcp", ln.Addr().String())
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if err != nil {
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errc <- err
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return
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}
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defer c2.Close()
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errc <- peer2(c2.(*TCPConn))
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}()
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for i := 0; i < 2; i++ {
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if err := <-errc; err != nil {
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t.Fatal(err)
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}
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}
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}
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// Tests that a blocked Read is interrupted by a concurrent SetReadDeadline
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// modifying that Conn's read deadline to the past.
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// See golang.org/cl/30164 which documented this. The net/http package
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// depends on this.
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func TestReadTimeoutUnblocksRead(t *testing.T) {
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serverDone := make(chan struct{})
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server := func(cs *TCPConn) error {
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defer close(serverDone)
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errc := make(chan error, 1)
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go func() {
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defer close(errc)
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go func() {
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// TODO: find a better way to wait
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// until we're blocked in the cs.Read
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// call below. Sleep is lame.
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time.Sleep(100 * time.Millisecond)
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// Interrupt the upcoming Read, unblocking it:
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cs.SetReadDeadline(time.Unix(123, 0)) // time in the past
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}()
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var buf [1]byte
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n, err := cs.Read(buf[:1])
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if n != 0 || err == nil {
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errc <- fmt.Errorf("Read = %v, %v; want 0, non-nil", n, err)
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}
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}()
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select {
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case err := <-errc:
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return err
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case <-time.After(5 * time.Second):
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buf := make([]byte, 2<<20)
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buf = buf[:runtime.Stack(buf, true)]
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println("Stacks at timeout:\n", string(buf))
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return errors.New("timeout waiting for Read to finish")
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}
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}
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// Do nothing in the client. Never write. Just wait for the
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// server's half to be done.
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client := func(*TCPConn) error {
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<-serverDone
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return nil
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}
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withTCPConnPair(t, client, server)
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}
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// Issue 17695: verify that a blocked Read is woken up by a Close.
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func TestCloseUnblocksRead(t *testing.T) {
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t.Parallel()
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server := func(cs *TCPConn) error {
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// Give the client time to get stuck in a Read:
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time.Sleep(20 * time.Millisecond)
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cs.Close()
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return nil
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}
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client := func(ss *TCPConn) error {
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n, err := ss.Read([]byte{0})
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if n != 0 || err != io.EOF {
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return fmt.Errorf("Read = %v, %v; want 0, EOF", n, err)
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}
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return nil
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}
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withTCPConnPair(t, client, server)
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}
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