1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package waitable
import (
"testing"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/header"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
type countedEndpoint struct {
dispatchCount int
writeCount int
attachCount int
mtu uint32
capabilities stack.LinkEndpointCapabilities
hdrLen uint16
linkAddr tcpip.LinkAddress
dispatcher stack.NetworkDispatcher
}
func (e *countedEndpoint) DeliverNetworkPacket(remote, local tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) {
e.dispatchCount++
}
func (e *countedEndpoint) DeliverOutboundPacket(remote, local tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) {
panic("unimplemented")
}
func (e *countedEndpoint) Attach(dispatcher stack.NetworkDispatcher) {
e.attachCount++
e.dispatcher = dispatcher
}
// IsAttached implements stack.LinkEndpoint.IsAttached.
func (e *countedEndpoint) IsAttached() bool {
return e.dispatcher != nil
}
func (e *countedEndpoint) MTU() uint32 {
return e.mtu
}
func (e *countedEndpoint) Capabilities() stack.LinkEndpointCapabilities {
return e.capabilities
}
func (e *countedEndpoint) MaxHeaderLength() uint16 {
return e.hdrLen
}
func (e *countedEndpoint) LinkAddress() tcpip.LinkAddress {
return e.linkAddr
}
func (e *countedEndpoint) WritePacket(stack.RouteInfo, *stack.GSO, tcpip.NetworkProtocolNumber, *stack.PacketBuffer) *tcpip.Error {
e.writeCount++
return nil
}
// WritePackets implements stack.LinkEndpoint.WritePackets.
func (e *countedEndpoint) WritePackets(_ stack.RouteInfo, _ *stack.GSO, pkts stack.PacketBufferList, _ tcpip.NetworkProtocolNumber) (int, *tcpip.Error) {
e.writeCount += pkts.Len()
return pkts.Len(), nil
}
// ARPHardwareType implements stack.LinkEndpoint.ARPHardwareType.
func (*countedEndpoint) ARPHardwareType() header.ARPHardwareType {
panic("unimplemented")
}
// Wait implements stack.LinkEndpoint.Wait.
func (*countedEndpoint) Wait() {}
// AddHeader implements stack.LinkEndpoint.AddHeader.
func (e *countedEndpoint) AddHeader(local, remote tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) {
panic("unimplemented")
}
func TestWaitWrite(t *testing.T) {
ep := &countedEndpoint{}
wep := New(ep)
// Write and check that it goes through.
wep.WritePacket(stack.RouteInfo{}, nil /* gso */, 0, stack.NewPacketBuffer(stack.PacketBufferOptions{}))
if want := 1; ep.writeCount != want {
t.Fatalf("Unexpected writeCount: got=%v, want=%v", ep.writeCount, want)
}
// Wait on dispatches, then try to write. It must go through.
wep.WaitDispatch()
wep.WritePacket(stack.RouteInfo{}, nil /* gso */, 0, stack.NewPacketBuffer(stack.PacketBufferOptions{}))
if want := 2; ep.writeCount != want {
t.Fatalf("Unexpected writeCount: got=%v, want=%v", ep.writeCount, want)
}
// Wait on writes, then try to write. It must not go through.
wep.WaitWrite()
wep.WritePacket(stack.RouteInfo{}, nil /* gso */, 0, stack.NewPacketBuffer(stack.PacketBufferOptions{}))
if want := 2; ep.writeCount != want {
t.Fatalf("Unexpected writeCount: got=%v, want=%v", ep.writeCount, want)
}
}
func TestWaitDispatch(t *testing.T) {
ep := &countedEndpoint{}
wep := New(ep)
// Check that attach happens.
wep.Attach(ep)
if want := 1; ep.attachCount != want {
t.Fatalf("Unexpected attachCount: got=%v, want=%v", ep.attachCount, want)
}
// Dispatch and check that it goes through.
ep.dispatcher.DeliverNetworkPacket("", "", 0, stack.NewPacketBuffer(stack.PacketBufferOptions{}))
if want := 1; ep.dispatchCount != want {
t.Fatalf("Unexpected dispatchCount: got=%v, want=%v", ep.dispatchCount, want)
}
// Wait on writes, then try to dispatch. It must go through.
wep.WaitWrite()
ep.dispatcher.DeliverNetworkPacket("", "", 0, stack.NewPacketBuffer(stack.PacketBufferOptions{}))
if want := 2; ep.dispatchCount != want {
t.Fatalf("Unexpected dispatchCount: got=%v, want=%v", ep.dispatchCount, want)
}
// Wait on dispatches, then try to dispatch. It must not go through.
wep.WaitDispatch()
ep.dispatcher.DeliverNetworkPacket("", "", 0, stack.NewPacketBuffer(stack.PacketBufferOptions{}))
if want := 2; ep.dispatchCount != want {
t.Fatalf("Unexpected dispatchCount: got=%v, want=%v", ep.dispatchCount, want)
}
}
func TestOtherMethods(t *testing.T) {
const (
mtu = 0xdead
capabilities = 0xbeef
hdrLen = 0x1234
linkAddr = "test address"
)
ep := &countedEndpoint{
mtu: mtu,
capabilities: capabilities,
hdrLen: hdrLen,
linkAddr: linkAddr,
}
wep := New(ep)
if v := wep.MTU(); v != mtu {
t.Fatalf("Unexpected mtu: got=%v, want=%v", v, mtu)
}
if v := wep.Capabilities(); v != capabilities {
t.Fatalf("Unexpected capabilities: got=%v, want=%v", v, capabilities)
}
if v := wep.MaxHeaderLength(); v != hdrLen {
t.Fatalf("Unexpected MaxHeaderLength: got=%v, want=%v", v, hdrLen)
}
if v := wep.LinkAddress(); v != linkAddr {
t.Fatalf("Unexpected LinkAddress: got=%q, want=%q", v, linkAddr)
}
}
|
