initial commit

vendor/golang.org/x/net/ipv4/header_test.go

@@ -0,0 +1,114 @@
+// 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"
+	"net"
+	"reflect"
+	"runtime"
+	"testing"
+)
+
+var (
+	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,
+	}
+	// TODO(mikio): Add platform dependent wire header formats when
+	// we support new platforms.
+
+	testHeader = &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) {
+	b, err := testHeader.Marshal()
+	if err != nil {
+		t.Fatal(err)
+	}
+	var wh []byte
+	switch runtime.GOOS {
+	case "darwin", "dragonfly", "netbsd":
+		wh = wireHeaderToTradBSDKernel[:]
+	case "freebsd":
+		if freebsdVersion < 1000000 {
+			wh = wireHeaderToTradBSDKernel[:]
+		} else {
+			wh = wireHeaderFromFreeBSD10Kernel[:]
+		}
+	default:
+		wh = wireHeaderToKernel[:]
+	}
+	if !bytes.Equal(b, wh) {
+		t.Fatalf("got %#v; want %#v", b, wh)
+	}
+}
+
+func TestParseHeader(t *testing.T) {
+	var wh []byte
+	switch runtime.GOOS {
+	case "darwin", "dragonfly", "netbsd":
+		wh = wireHeaderFromTradBSDKernel[:]
+	case "freebsd":
+		if freebsdVersion < 1000000 {
+			wh = wireHeaderFromTradBSDKernel[:]
+		} else {
+			wh = wireHeaderFromFreeBSD10Kernel[:]
+		}
+	default:
+		wh = wireHeaderFromKernel[:]
+	}
+	h, err := ParseHeader(wh)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !reflect.DeepEqual(h, testHeader) {
+		t.Fatalf("got %#v; want %#v", h, testHeader)
+	}
+}