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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build go1.9
// +build darwin dragonfly freebsd linux netbsd openbsd solaris
package socket_test
import (
"bytes"
"fmt"
"net"
"runtime"
"testing"
"golang.org/x/net/internal/nettest"
"golang.org/x/net/internal/socket"
)
type mockControl struct {
Level int
Type int
Data []byte
}
func TestControlMessage(t *testing.T) {
for _, tt := range []struct {
cs []mockControl
}{
{
[]mockControl{
{Level: 1, Type: 1},
},
},
{
[]mockControl{
{Level: 2, Type: 2, Data: []byte{0xfe}},
},
},
{
[]mockControl{
{Level: 3, Type: 3, Data: []byte{0xfe, 0xff, 0xff, 0xfe}},
},
},
{
[]mockControl{
{Level: 4, Type: 4, Data: []byte{0xfe, 0xff, 0xff, 0xfe, 0xfe, 0xff, 0xff, 0xfe}},
},
},
{
[]mockControl{
{Level: 4, Type: 4, Data: []byte{0xfe, 0xff, 0xff, 0xfe, 0xfe, 0xff, 0xff, 0xfe}},
{Level: 2, Type: 2, Data: []byte{0xfe}},
},
},
} {
var w []byte
var tailPadLen int
mm := socket.NewControlMessage([]int{0})
for i, c := range tt.cs {
m := socket.NewControlMessage([]int{len(c.Data)})
l := len(m) - len(mm)
if i == len(tt.cs)-1 && l > len(c.Data) {
tailPadLen = l - len(c.Data)
}
w = append(w, m...)
}
var err error
ww := make([]byte, len(w))
copy(ww, w)
m := socket.ControlMessage(ww)
for _, c := range tt.cs {
if err = m.MarshalHeader(c.Level, c.Type, len(c.Data)); err != nil {
t.Fatalf("(%v).MarshalHeader() = %v", tt.cs, err)
}
copy(m.Data(len(c.Data)), c.Data)
m = m.Next(len(c.Data))
}
m = socket.ControlMessage(w)
for _, c := range tt.cs {
m, err = m.Marshal(c.Level, c.Type, c.Data)
if err != nil {
t.Fatalf("(%v).Marshal() = %v", tt.cs, err)
}
}
if !bytes.Equal(ww, w) {
t.Fatalf("got %#v; want %#v", ww, w)
}
ws := [][]byte{w}
if tailPadLen > 0 {
// Test a message with no tail padding.
nopad := w[:len(w)-tailPadLen]
ws = append(ws, [][]byte{nopad}...)
}
for _, w := range ws {
ms, err := socket.ControlMessage(w).Parse()
if err != nil {
t.Fatalf("(%v).Parse() = %v", tt.cs, err)
}
for i, m := range ms {
lvl, typ, dataLen, err := m.ParseHeader()
if err != nil {
t.Fatalf("(%v).ParseHeader() = %v", tt.cs, err)
}
if lvl != tt.cs[i].Level || typ != tt.cs[i].Type || dataLen != len(tt.cs[i].Data) {
t.Fatalf("%v: got %d, %d, %d; want %d, %d, %d", tt.cs[i], lvl, typ, dataLen, tt.cs[i].Level, tt.cs[i].Type, len(tt.cs[i].Data))
}
}
}
}
}
func TestUDP(t *testing.T) {
c, err := nettest.NewLocalPacketListener("udp")
if err != nil {
t.Skipf("not supported on %s/%s: %v", runtime.GOOS, runtime.GOARCH, err)
}
defer c.Close()
cc, err := socket.NewConn(c.(net.Conn))
if err != nil {
t.Fatal(err)
}
t.Run("Message", func(t *testing.T) {
data := []byte("HELLO-R-U-THERE")
wm := socket.Message{
Buffers: bytes.SplitAfter(data, []byte("-")),
Addr: c.LocalAddr(),
}
if err := cc.SendMsg(&wm, 0); err != nil {
t.Fatal(err)
}
b := make([]byte, 32)
rm := socket.Message{
Buffers: [][]byte{b[:1], b[1:3], b[3:7], b[7:11], b[11:]},
}
if err := cc.RecvMsg(&rm, 0); err != nil {
t.Fatal(err)
}
if !bytes.Equal(b[:rm.N], data) {
t.Fatalf("got %#v; want %#v", b[:rm.N], data)
}
})
switch runtime.GOOS {
case "android", "linux":
t.Run("Messages", func(t *testing.T) {
data := []byte("HELLO-R-U-THERE")
wmbs := bytes.SplitAfter(data, []byte("-"))
wms := []socket.Message{
{Buffers: wmbs[:1], Addr: c.LocalAddr()},
{Buffers: wmbs[1:], Addr: c.LocalAddr()},
}
n, err := cc.SendMsgs(wms, 0)
if err != nil {
t.Fatal(err)
}
if n != len(wms) {
t.Fatalf("got %d; want %d", n, len(wms))
}
b := make([]byte, 32)
rmbs := [][][]byte{{b[:len(wmbs[0])]}, {b[len(wmbs[0]):]}}
rms := []socket.Message{
{Buffers: rmbs[0]},
{Buffers: rmbs[1]},
}
n, err = cc.RecvMsgs(rms, 0)
if err != nil {
t.Fatal(err)
}
if n != len(rms) {
t.Fatalf("got %d; want %d", n, len(rms))
}
nn := 0
for i := 0; i < n; i++ {
nn += rms[i].N
}
if !bytes.Equal(b[:nn], data) {
t.Fatalf("got %#v; want %#v", b[:nn], data)
}
})
}
// The behavior of transmission for zero byte paylaod depends
// on each platform implementation. Some may transmit only
// protocol header and options, other may transmit nothing.
// We test only that SendMsg and SendMsgs will not crash with
// empty buffers.
wm := socket.Message{
Buffers: [][]byte{{}},
Addr: c.LocalAddr(),
}
cc.SendMsg(&wm, 0)
wms := []socket.Message{
{Buffers: [][]byte{{}}, Addr: c.LocalAddr()},
}
cc.SendMsgs(wms, 0)
}
func BenchmarkUDP(b *testing.B) {
c, err := nettest.NewLocalPacketListener("udp")
if err != nil {
b.Skipf("not supported on %s/%s: %v", runtime.GOOS, runtime.GOARCH, err)
}
defer c.Close()
cc, err := socket.NewConn(c.(net.Conn))
if err != nil {
b.Fatal(err)
}
data := []byte("HELLO-R-U-THERE")
wm := socket.Message{
Buffers: [][]byte{data},
Addr: c.LocalAddr(),
}
rm := socket.Message{
Buffers: [][]byte{make([]byte, 128)},
OOB: make([]byte, 128),
}
for M := 1; M <= 1<<9; M = M << 1 {
b.Run(fmt.Sprintf("Iter-%d", M), func(b *testing.B) {
for i := 0; i < b.N; i++ {
for j := 0; j < M; j++ {
if err := cc.SendMsg(&wm, 0); err != nil {
b.Fatal(err)
}
if err := cc.RecvMsg(&rm, 0); err != nil {
b.Fatal(err)
}
}
}
})
switch runtime.GOOS {
case "android", "linux":
wms := make([]socket.Message, M)
for i := range wms {
wms[i].Buffers = [][]byte{data}
wms[i].Addr = c.LocalAddr()
}
rms := make([]socket.Message, M)
for i := range rms {
rms[i].Buffers = [][]byte{make([]byte, 128)}
rms[i].OOB = make([]byte, 128)
}
b.Run(fmt.Sprintf("Batch-%d", M), func(b *testing.B) {
for i := 0; i < b.N; i++ {
if _, err := cc.SendMsgs(wms, 0); err != nil {
b.Fatal(err)
}
if _, err := cc.RecvMsgs(rms, 0); err != nil {
b.Fatal(err)
}
}
})
}
}
}