mirror of
https://github.com/golang/go
synced 2024-10-05 09:21:22 -06:00
6563d8623d
Handle return values from recvfrom correctly when the kernel decides to not return an address. Fixes #4636. Fixes #4352. R=rsc, mikioh.mikioh, dave CC=golang-dev https://golang.org/cl/7058062
124 lines
2.6 KiB
Go
124 lines
2.6 KiB
Go
// Copyright 2013 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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// +build !plan9,!windows
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package net
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import (
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"bytes"
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"io/ioutil"
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"os"
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"syscall"
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"testing"
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"time"
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)
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// testUnixAddr uses ioutil.TempFile to get a name that is unique.
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func testUnixAddr() string {
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f, err := ioutil.TempFile("", "nettest")
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if err != nil {
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panic(err)
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}
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addr := f.Name()
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f.Close()
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os.Remove(addr)
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return addr
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}
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func TestReadUnixgramWithUnnamedSocket(t *testing.T) {
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addr := testUnixAddr()
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la, err := ResolveUnixAddr("unixgram", addr)
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if err != nil {
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t.Fatalf("ResolveUnixAddr failed: %v", err)
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}
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c, err := ListenUnixgram("unixgram", la)
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if err != nil {
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t.Fatalf("ListenUnixgram failed: %v", err)
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}
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defer func() {
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c.Close()
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os.Remove(addr)
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}()
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off := make(chan bool)
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data := [5]byte{1, 2, 3, 4, 5}
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go func() {
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defer func() { off <- true }()
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s, err := syscall.Socket(syscall.AF_UNIX, syscall.SOCK_DGRAM, 0)
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if err != nil {
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t.Errorf("syscall.Socket failed: %v", err)
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return
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}
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defer syscall.Close(s)
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rsa := &syscall.SockaddrUnix{Name: addr}
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if err := syscall.Sendto(s, data[:], 0, rsa); err != nil {
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t.Errorf("syscall.Sendto failed: %v", err)
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return
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}
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}()
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<-off
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b := make([]byte, 64)
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c.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
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n, from, err := c.ReadFrom(b)
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if err != nil {
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t.Errorf("UnixConn.ReadFrom failed: %v", err)
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return
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}
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if from != nil {
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t.Errorf("neighbor address is %v", from)
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}
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if !bytes.Equal(b[:n], data[:]) {
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t.Errorf("got %v, want %v", b[:n], data[:])
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return
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}
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}
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func TestReadUnixgramWithZeroBytesBuffer(t *testing.T) {
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// issue 4352: Recvfrom failed with "address family not
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// supported by protocol family" if zero-length buffer provided
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addr := testUnixAddr()
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la, err := ResolveUnixAddr("unixgram", addr)
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if err != nil {
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t.Fatalf("ResolveUnixAddr failed: %v", err)
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}
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c, err := ListenUnixgram("unixgram", la)
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if err != nil {
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t.Fatalf("ListenUnixgram failed: %v", err)
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}
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defer func() {
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c.Close()
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os.Remove(addr)
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}()
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off := make(chan bool)
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go func() {
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defer func() { off <- true }()
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c, err := DialUnix("unixgram", nil, la)
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if err != nil {
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t.Errorf("DialUnix failed: %v", err)
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return
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}
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defer c.Close()
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if _, err := c.Write([]byte{1, 2, 3, 4, 5}); err != nil {
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t.Errorf("UnixConn.Write failed: %v", err)
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return
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}
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}()
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<-off
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c.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
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var peer Addr
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if _, peer, err = c.ReadFrom(nil); err != nil {
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t.Errorf("UnixConn.ReadFrom failed: %v", err)
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return
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}
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if peer != nil {
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t.Errorf("peer adddress is %v", peer)
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}
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}
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