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// Copyright 2012 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.
package ipv4
import (
"bytes"
"encoding/binary"
"net"
"reflect"
"runtime"
"strings"
"testing"
)
type headerTest struct {
wireHeaderFromKernel [HeaderLen]byte
wireHeaderToKernel [HeaderLen]byte
wireHeaderFromTradBSDKernel [HeaderLen]byte
wireHeaderFromFreeBSD10Kernel [HeaderLen]byte
wireHeaderToTradBSDKernel [HeaderLen]byte
*Header
}
var headerLittleEndianTest = headerTest{
// TODO(mikio): Add platform dependent wire header formats when
// we support new platforms.
wireHeaderFromKernel: [HeaderLen]byte{
0x45, 0x01, 0xbe, 0xef,
0xca, 0xfe, 0x45, 0xdc,
0xff, 0x01, 0xde, 0xad,
172, 16, 254, 254,
192, 168, 0, 1,
},
wireHeaderToKernel: [HeaderLen]byte{
0x45, 0x01, 0xbe, 0xef,
0xca, 0xfe, 0x45, 0xdc,
0xff, 0x01, 0xde, 0xad,
172, 16, 254, 254,
192, 168, 0, 1,
},
wireHeaderFromTradBSDKernel: [HeaderLen]byte{
0x45, 0x01, 0xdb, 0xbe,
0xca, 0xfe, 0xdc, 0x45,
0xff, 0x01, 0xde, 0xad,
172, 16, 254, 254,
192, 168, 0, 1,
},
wireHeaderFromFreeBSD10Kernel: [HeaderLen]byte{
0x45, 0x01, 0xef, 0xbe,
0xca, 0xfe, 0xdc, 0x45,
0xff, 0x01, 0xde, 0xad,
172, 16, 254, 254,
192, 168, 0, 1,
},
wireHeaderToTradBSDKernel: [HeaderLen]byte{
0x45, 0x01, 0xef, 0xbe,
0xca, 0xfe, 0xdc, 0x45,
0xff, 0x01, 0xde, 0xad,
172, 16, 254, 254,
192, 168, 0, 1,
},
Header: &Header{
Version: Version,
Len: HeaderLen,
TOS: 1,
TotalLen: 0xbeef,
ID: 0xcafe,
Flags: DontFragment,
FragOff: 1500,
TTL: 255,
Protocol: 1,
Checksum: 0xdead,
Src: net.IPv4(172, 16, 254, 254),
Dst: net.IPv4(192, 168, 0, 1),
},
}
func TestMarshalHeader(t *testing.T) {
tt := &headerLittleEndianTest
if nativeEndian != binary.LittleEndian {
t.Skip("no test for non-little endian machine yet")
}
b, err := tt.Header.Marshal()
if err != nil {
t.Fatal(err)
}
var wh []byte
switch runtime.GOOS {
case "darwin", "dragonfly", "netbsd":
wh = tt.wireHeaderToTradBSDKernel[:]
case "freebsd":
if freebsdVersion < 1000000 {
wh = tt.wireHeaderToTradBSDKernel[:]
} else {
wh = tt.wireHeaderFromFreeBSD10Kernel[:]
}
default:
wh = tt.wireHeaderToKernel[:]
}
if !bytes.Equal(b, wh) {
t.Fatalf("got %#v; want %#v", b, wh)
}
}
func TestParseHeader(t *testing.T) {
tt := &headerLittleEndianTest
if nativeEndian != binary.LittleEndian {
t.Skip("no test for big endian machine yet")
}
var wh []byte
switch runtime.GOOS {
case "darwin", "dragonfly", "netbsd":
wh = tt.wireHeaderFromTradBSDKernel[:]
case "freebsd":
if freebsdVersion < 1000000 {
wh = tt.wireHeaderFromTradBSDKernel[:]
} else {
wh = tt.wireHeaderFromFreeBSD10Kernel[:]
}
default:
wh = tt.wireHeaderFromKernel[:]
}
h, err := ParseHeader(wh)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(h, tt.Header) {
t.Fatalf("got %#v; want %#v", h, tt.Header)
}
s := h.String()
if strings.Contains(s, ",") {
t.Fatalf("should be space-separated values: %s", s)
}
}
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