157 lines
4.1 KiB
Go
157 lines
4.1 KiB
Go
// Copyright 2020 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package testbench
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import (
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"testing"
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"gvisor.dev/gvisor/pkg/tcpip"
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)
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func TestLayerMatch(t *testing.T) {
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var nilPayload *Payload
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noPayload := &Payload{}
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emptyPayload := &Payload{Bytes: []byte{}}
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fullPayload := &Payload{Bytes: []byte{1, 2, 3}}
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emptyTCP := &TCP{SrcPort: Uint16(1234), LayerBase: LayerBase{nextLayer: emptyPayload}}
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fullTCP := &TCP{SrcPort: Uint16(1234), LayerBase: LayerBase{nextLayer: fullPayload}}
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for _, tt := range []struct {
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a, b Layer
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want bool
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}{
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{nilPayload, nilPayload, true},
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{nilPayload, noPayload, true},
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{nilPayload, emptyPayload, true},
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{nilPayload, fullPayload, true},
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{noPayload, noPayload, true},
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{noPayload, emptyPayload, true},
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{noPayload, fullPayload, true},
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{emptyPayload, emptyPayload, true},
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{emptyPayload, fullPayload, false},
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{fullPayload, fullPayload, true},
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{emptyTCP, fullTCP, true},
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} {
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if got := tt.a.match(tt.b); got != tt.want {
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t.Errorf("%s.match(%s) = %t, want %t", tt.a, tt.b, got, tt.want)
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}
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if got := tt.b.match(tt.a); got != tt.want {
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t.Errorf("%s.match(%s) = %t, want %t", tt.b, tt.a, got, tt.want)
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}
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}
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}
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func TestLayerStringFormat(t *testing.T) {
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for _, tt := range []struct {
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name string
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l Layer
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want string
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}{
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{
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name: "TCP",
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l: &TCP{
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SrcPort: Uint16(34785),
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DstPort: Uint16(47767),
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SeqNum: Uint32(3452155723),
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AckNum: Uint32(2596996163),
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DataOffset: Uint8(5),
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Flags: Uint8(20),
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WindowSize: Uint16(64240),
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Checksum: Uint16(0x2e2b),
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},
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want: "&testbench.TCP{" +
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"SrcPort:34785 " +
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"DstPort:47767 " +
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"SeqNum:3452155723 " +
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"AckNum:2596996163 " +
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"DataOffset:5 " +
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"Flags:20 " +
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"WindowSize:64240 " +
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"Checksum:11819" +
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"}",
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},
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{
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name: "UDP",
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l: &UDP{
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SrcPort: Uint16(34785),
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DstPort: Uint16(47767),
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Length: Uint16(12),
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},
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want: "&testbench.UDP{" +
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"SrcPort:34785 " +
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"DstPort:47767 " +
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"Length:12" +
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"}",
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},
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{
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name: "IPv4",
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l: &IPv4{
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IHL: Uint8(5),
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TOS: Uint8(0),
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TotalLength: Uint16(44),
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ID: Uint16(0),
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Flags: Uint8(2),
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FragmentOffset: Uint16(0),
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TTL: Uint8(64),
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Protocol: Uint8(6),
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Checksum: Uint16(0x2e2b),
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SrcAddr: Address(tcpip.Address([]byte{197, 34, 63, 10})),
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DstAddr: Address(tcpip.Address([]byte{197, 34, 63, 20})),
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},
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want: "&testbench.IPv4{" +
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"IHL:5 " +
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"TOS:0 " +
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"TotalLength:44 " +
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"ID:0 " +
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"Flags:2 " +
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"FragmentOffset:0 " +
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"TTL:64 " +
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"Protocol:6 " +
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"Checksum:11819 " +
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"SrcAddr:197.34.63.10 " +
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"DstAddr:197.34.63.20" +
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"}",
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},
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{
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name: "Ether",
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l: &Ether{
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SrcAddr: LinkAddress(tcpip.LinkAddress([]byte{0x02, 0x42, 0xc5, 0x22, 0x3f, 0x0a})),
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DstAddr: LinkAddress(tcpip.LinkAddress([]byte{0x02, 0x42, 0xc5, 0x22, 0x3f, 0x14})),
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Type: NetworkProtocolNumber(4),
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},
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want: "&testbench.Ether{" +
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"SrcAddr:02:42:c5:22:3f:0a " +
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"DstAddr:02:42:c5:22:3f:14 " +
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"Type:4" +
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"}",
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},
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{
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name: "Payload",
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l: &Payload{
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Bytes: []byte("Hooray for packetimpact."),
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},
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want: "&testbench.Payload{Bytes:\n" +
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"00000000 48 6f 6f 72 61 79 20 66 6f 72 20 70 61 63 6b 65 |Hooray for packe|\n" +
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"00000010 74 69 6d 70 61 63 74 2e |timpact.|\n" +
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"}",
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},
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} {
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t.Run(tt.name, func(t *testing.T) {
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if got := tt.l.String(); got != tt.want {
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t.Errorf("%s.String() = %s, want: %s", tt.name, got, tt.want)
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}
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})
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}
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}
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