334 lines
8 KiB
Go
334 lines
8 KiB
Go
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// Copyright 2015 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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package icmp
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import (
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"fmt"
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"net"
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"reflect"
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"testing"
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"golang.org/x/net/internal/iana"
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"golang.org/x/net/ipv4"
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"golang.org/x/net/ipv6"
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)
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func TestMarshalAndParseExtension(t *testing.T) {
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fn := func(t *testing.T, proto int, typ Type, hdr, obj []byte, te Extension) error {
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b, err := te.Marshal(proto)
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if err != nil {
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return err
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}
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if !reflect.DeepEqual(b, obj) {
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return fmt.Errorf("got %#v; want %#v", b, obj)
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}
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switch typ {
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case ipv4.ICMPTypeExtendedEchoRequest, ipv6.ICMPTypeExtendedEchoRequest:
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exts, l, err := parseExtensions(typ, append(hdr, obj...), 0)
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if err != nil {
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return err
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}
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if l != 0 {
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return fmt.Errorf("got %d; want 0", l)
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}
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if !reflect.DeepEqual(exts, []Extension{te}) {
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return fmt.Errorf("got %#v; want %#v", exts[0], te)
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}
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default:
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for i, wire := range []struct {
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data []byte // original datagram
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inlattr int // length of padded original datagram, a hint
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outlattr int // length of padded original datagram, a want
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err error
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}{
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{nil, 0, -1, errNoExtension},
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{make([]byte, 127), 128, -1, errNoExtension},
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{make([]byte, 128), 127, -1, errNoExtension},
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{make([]byte, 128), 128, -1, errNoExtension},
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{make([]byte, 128), 129, -1, errNoExtension},
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{append(make([]byte, 128), append(hdr, obj...)...), 127, 128, nil},
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{append(make([]byte, 128), append(hdr, obj...)...), 128, 128, nil},
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{append(make([]byte, 128), append(hdr, obj...)...), 129, 128, nil},
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{append(make([]byte, 512), append(hdr, obj...)...), 511, -1, errNoExtension},
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{append(make([]byte, 512), append(hdr, obj...)...), 512, 512, nil},
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{append(make([]byte, 512), append(hdr, obj...)...), 513, -1, errNoExtension},
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} {
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exts, l, err := parseExtensions(typ, wire.data, wire.inlattr)
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if err != wire.err {
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return fmt.Errorf("#%d: got %v; want %v", i, err, wire.err)
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}
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if wire.err != nil {
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continue
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}
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if l != wire.outlattr {
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return fmt.Errorf("#%d: got %d; want %d", i, l, wire.outlattr)
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}
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if !reflect.DeepEqual(exts, []Extension{te}) {
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return fmt.Errorf("#%d: got %#v; want %#v", i, exts[0], te)
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}
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}
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}
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return nil
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}
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t.Run("MPLSLabelStack", func(t *testing.T) {
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for _, et := range []struct {
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proto int
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typ Type
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hdr []byte
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obj []byte
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ext Extension
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}{
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// MPLS label stack with no label
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{
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proto: iana.ProtocolICMP,
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typ: ipv4.ICMPTypeDestinationUnreachable,
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hdr: []byte{
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0x20, 0x00, 0x00, 0x00,
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},
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obj: []byte{
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0x00, 0x04, 0x01, 0x01,
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},
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ext: &MPLSLabelStack{
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Class: classMPLSLabelStack,
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Type: typeIncomingMPLSLabelStack,
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},
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},
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// MPLS label stack with a single label
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{
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proto: iana.ProtocolIPv6ICMP,
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typ: ipv6.ICMPTypeDestinationUnreachable,
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hdr: []byte{
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0x20, 0x00, 0x00, 0x00,
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},
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obj: []byte{
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0x00, 0x08, 0x01, 0x01,
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0x03, 0xe8, 0xe9, 0xff,
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},
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ext: &MPLSLabelStack{
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Class: classMPLSLabelStack,
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Type: typeIncomingMPLSLabelStack,
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Labels: []MPLSLabel{
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{
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Label: 16014,
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TC: 0x4,
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S: true,
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TTL: 255,
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},
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},
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},
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},
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// MPLS label stack with multiple labels
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{
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proto: iana.ProtocolICMP,
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typ: ipv4.ICMPTypeDestinationUnreachable,
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hdr: []byte{
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0x20, 0x00, 0x00, 0x00,
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},
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obj: []byte{
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0x00, 0x0c, 0x01, 0x01,
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0x03, 0xe8, 0xde, 0xfe,
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0x03, 0xe8, 0xe1, 0xff,
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},
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ext: &MPLSLabelStack{
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Class: classMPLSLabelStack,
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Type: typeIncomingMPLSLabelStack,
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Labels: []MPLSLabel{
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{
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Label: 16013,
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TC: 0x7,
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S: false,
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TTL: 254,
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},
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{
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Label: 16014,
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TC: 0,
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S: true,
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TTL: 255,
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},
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},
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},
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},
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} {
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if err := fn(t, et.proto, et.typ, et.hdr, et.obj, et.ext); err != nil {
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t.Error(err)
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}
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}
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})
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t.Run("InterfaceInfo", func(t *testing.T) {
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for _, et := range []struct {
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proto int
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typ Type
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hdr []byte
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obj []byte
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ext Extension
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}{
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// Interface information with no attribute
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{
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proto: iana.ProtocolICMP,
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typ: ipv4.ICMPTypeDestinationUnreachable,
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hdr: []byte{
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0x20, 0x00, 0x00, 0x00,
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},
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obj: []byte{
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0x00, 0x04, 0x02, 0x00,
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},
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ext: &InterfaceInfo{
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Class: classInterfaceInfo,
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},
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},
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// Interface information with ifIndex and name
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{
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proto: iana.ProtocolICMP,
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typ: ipv4.ICMPTypeDestinationUnreachable,
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hdr: []byte{
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0x20, 0x00, 0x00, 0x00,
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},
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obj: []byte{
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0x00, 0x10, 0x02, 0x0a,
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0x00, 0x00, 0x00, 0x10,
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0x08, byte('e'), byte('n'), byte('1'),
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byte('0'), byte('1'), 0x00, 0x00,
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},
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ext: &InterfaceInfo{
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Class: classInterfaceInfo,
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Type: 0x0a,
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Interface: &net.Interface{
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Index: 16,
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Name: "en101",
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},
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},
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},
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// Interface information with ifIndex, IPAddr, name and MTU
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{
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proto: iana.ProtocolIPv6ICMP,
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typ: ipv6.ICMPTypeDestinationUnreachable,
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hdr: []byte{
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0x20, 0x00, 0x00, 0x00,
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},
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obj: []byte{
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0x00, 0x28, 0x02, 0x0f,
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0x00, 0x00, 0x00, 0x0f,
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0x00, 0x02, 0x00, 0x00,
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0xfe, 0x80, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x01,
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0x08, byte('e'), byte('n'), byte('1'),
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byte('0'), byte('1'), 0x00, 0x00,
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0x00, 0x00, 0x20, 0x00,
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},
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ext: &InterfaceInfo{
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Class: classInterfaceInfo,
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Type: 0x0f,
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Interface: &net.Interface{
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Index: 15,
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Name: "en101",
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MTU: 8192,
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},
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Addr: &net.IPAddr{
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IP: net.ParseIP("fe80::1"),
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Zone: "en101",
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},
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},
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},
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} {
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if err := fn(t, et.proto, et.typ, et.hdr, et.obj, et.ext); err != nil {
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t.Error(err)
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}
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}
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})
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t.Run("InterfaceIdent", func(t *testing.T) {
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for _, et := range []struct {
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proto int
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typ Type
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hdr []byte
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obj []byte
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ext Extension
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}{
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// Interface identification by name
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{
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proto: iana.ProtocolICMP,
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typ: ipv4.ICMPTypeExtendedEchoRequest,
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hdr: []byte{
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0x20, 0x00, 0x00, 0x00,
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},
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obj: []byte{
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0x00, 0x0c, 0x03, 0x01,
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byte('e'), byte('n'), byte('1'), byte('0'),
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byte('1'), 0x00, 0x00, 0x00,
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},
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ext: &InterfaceIdent{
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Class: classInterfaceIdent,
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Type: typeInterfaceByName,
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Name: "en101",
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},
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},
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// Interface identification by index
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{
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proto: iana.ProtocolIPv6ICMP,
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typ: ipv6.ICMPTypeExtendedEchoRequest,
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hdr: []byte{
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0x20, 0x00, 0x00, 0x00,
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},
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obj: []byte{
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0x00, 0x0c, 0x03, 0x02,
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0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x03, 0x8f,
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},
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ext: &InterfaceIdent{
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Class: classInterfaceIdent,
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Type: typeInterfaceByIndex,
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Index: 911,
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},
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},
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// Interface identification by address
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{
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proto: iana.ProtocolICMP,
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typ: ipv4.ICMPTypeExtendedEchoRequest,
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hdr: []byte{
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0x20, 0x00, 0x00, 0x00,
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},
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obj: []byte{
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0x00, 0x10, 0x03, 0x03,
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byte(iana.AddrFamily48bitMAC >> 8), byte(iana.AddrFamily48bitMAC & 0x0f), 0x06, 0x00,
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0x01, 0x23, 0x45, 0x67,
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0x89, 0xab, 0x00, 0x00,
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},
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ext: &InterfaceIdent{
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Class: classInterfaceIdent,
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Type: typeInterfaceByAddress,
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AFI: iana.AddrFamily48bitMAC,
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Addr: []byte{0x01, 0x23, 0x45, 0x67, 0x89, 0xab},
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},
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},
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} {
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if err := fn(t, et.proto, et.typ, et.hdr, et.obj, et.ext); err != nil {
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t.Error(err)
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}
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}
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})
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}
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func TestParseInterfaceName(t *testing.T) {
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ifi := InterfaceInfo{Interface: &net.Interface{}}
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for i, tt := range []struct {
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b []byte
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error
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}{
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{[]byte{0, 'e', 'n', '0'}, errInvalidExtension},
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{[]byte{4, 'e', 'n', '0'}, nil},
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{[]byte{7, 'e', 'n', '0', 0xff, 0xff, 0xff, 0xff}, errInvalidExtension},
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{[]byte{8, 'e', 'n', '0', 0xff, 0xff, 0xff}, errMessageTooShort},
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} {
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if _, err := ifi.parseName(tt.b); err != tt.error {
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t.Errorf("#%d: got %v; want %v", i, err, tt.error)
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}
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}
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}
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