152 lines
3.5 KiB
Go
152 lines
3.5 KiB
Go
// 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
|
|
wireHeaderToTradBSDKernel [HeaderLen]byte
|
|
wireHeaderFromFreeBSD10Kernel [HeaderLen]byte
|
|
wireHeaderToFreeBSD10Kernel [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,
|
|
},
|
|
wireHeaderToTradBSDKernel: [HeaderLen]byte{
|
|
0x45, 0x01, 0xef, 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,
|
|
},
|
|
wireHeaderToFreeBSD10Kernel: [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":
|
|
switch {
|
|
case freebsdVersion < 1000000:
|
|
wh = tt.wireHeaderToTradBSDKernel[:]
|
|
case 1000000 <= freebsdVersion && freebsdVersion < 1100000:
|
|
wh = tt.wireHeaderToFreeBSD10Kernel[:]
|
|
default:
|
|
wh = tt.wireHeaderToKernel[:]
|
|
}
|
|
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":
|
|
switch {
|
|
case freebsdVersion < 1000000:
|
|
wh = tt.wireHeaderFromTradBSDKernel[:]
|
|
case 1000000 <= freebsdVersion && freebsdVersion < 1100000:
|
|
wh = tt.wireHeaderFromFreeBSD10Kernel[:]
|
|
default:
|
|
wh = tt.wireHeaderFromKernel[:]
|
|
}
|
|
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)
|
|
}
|
|
}
|