forked from chromium/chromium
-
Notifications
You must be signed in to change notification settings - Fork 0
/
address_sorter_posix_unittest.cc
393 lines (353 loc) · 13.3 KB
/
address_sorter_posix_unittest.cc
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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/dns/address_sorter_posix.h"
#include <memory>
#include <string>
#include "base/bind.h"
#include "base/check_op.h"
#include "base/macros.h"
#include "base/notreached.h"
#include "net/base/ip_address.h"
#include "net/base/net_errors.h"
#include "net/base/test_completion_callback.h"
#include "net/log/net_log_with_source.h"
#include "net/socket/client_socket_factory.h"
#include "net/socket/datagram_client_socket.h"
#include "net/socket/socket_performance_watcher.h"
#include "net/socket/ssl_client_socket.h"
#include "net/socket/stream_socket.h"
#include "net/test/test_with_task_environment.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
// Used to map destination address to source address.
typedef std::map<IPAddress, IPAddress> AddressMapping;
IPAddress ParseIP(const std::string& str) {
IPAddress addr;
CHECK(addr.AssignFromIPLiteral(str));
return addr;
}
// A mock socket which binds to source address according to AddressMapping.
class TestUDPClientSocket : public DatagramClientSocket {
public:
explicit TestUDPClientSocket(const AddressMapping* mapping)
: mapping_(mapping), connected_(false) {}
~TestUDPClientSocket() override = default;
int Read(IOBuffer*, int, CompletionOnceCallback) override {
NOTIMPLEMENTED();
return OK;
}
int Write(IOBuffer*,
int,
CompletionOnceCallback,
const NetworkTrafficAnnotationTag& traffic_annotation) override {
NOTIMPLEMENTED();
return OK;
}
int SetReceiveBufferSize(int32_t) override { return OK; }
int SetSendBufferSize(int32_t) override { return OK; }
int SetDoNotFragment() override { return OK; }
void Close() override {}
int GetPeerAddress(IPEndPoint* address) const override {
NOTIMPLEMENTED();
return OK;
}
int GetLocalAddress(IPEndPoint* address) const override {
if (!connected_)
return ERR_UNEXPECTED;
*address = local_endpoint_;
return OK;
}
void UseNonBlockingIO() override {}
int WriteAsync(
const char* buffer,
size_t buf_len,
CompletionOnceCallback callback,
const NetworkTrafficAnnotationTag& traffic_annotation) override {
NOTIMPLEMENTED();
return OK;
}
int WriteAsync(
DatagramBuffers buffers,
CompletionOnceCallback callback,
const NetworkTrafficAnnotationTag& traffic_annotation) override {
NOTIMPLEMENTED();
return OK;
}
DatagramBuffers GetUnwrittenBuffers() override {
DatagramBuffers result;
NOTIMPLEMENTED();
return result;
}
void SetWriteAsyncEnabled(bool enabled) override {}
void SetMaxPacketSize(size_t max_packet_size) override {}
bool WriteAsyncEnabled() override { return false; }
void SetWriteMultiCoreEnabled(bool enabled) override {}
void SetSendmmsgEnabled(bool enabled) override {}
void SetWriteBatchingActive(bool active) override {}
int SetMulticastInterface(uint32_t interface_index) override {
NOTIMPLEMENTED();
return ERR_NOT_IMPLEMENTED;
}
int ConnectUsingNetwork(NetworkChangeNotifier::NetworkHandle network,
const IPEndPoint& address) override {
NOTIMPLEMENTED();
return ERR_NOT_IMPLEMENTED;
}
int ConnectUsingDefaultNetwork(const IPEndPoint& address) override {
NOTIMPLEMENTED();
return ERR_NOT_IMPLEMENTED;
}
NetworkChangeNotifier::NetworkHandle GetBoundNetwork() const override {
return NetworkChangeNotifier::kInvalidNetworkHandle;
}
void ApplySocketTag(const SocketTag& tag) override {}
void SetMsgConfirm(bool confirm) override {}
int Connect(const IPEndPoint& remote) override {
if (connected_)
return ERR_UNEXPECTED;
auto it = mapping_->find(remote.address());
if (it == mapping_->end())
return ERR_FAILED;
connected_ = true;
local_endpoint_ = IPEndPoint(it->second, 39874 /* arbitrary port */);
return OK;
}
const NetLogWithSource& NetLog() const override { return net_log_; }
private:
NetLogWithSource net_log_;
const AddressMapping* mapping_;
bool connected_;
IPEndPoint local_endpoint_;
DISALLOW_COPY_AND_ASSIGN(TestUDPClientSocket);
};
// Creates TestUDPClientSockets and maintains an AddressMapping.
class TestSocketFactory : public ClientSocketFactory {
public:
TestSocketFactory() = default;
~TestSocketFactory() override = default;
std::unique_ptr<DatagramClientSocket> CreateDatagramClientSocket(
DatagramSocket::BindType,
NetLog*,
const NetLogSource&) override {
return std::unique_ptr<DatagramClientSocket>(
new TestUDPClientSocket(&mapping_));
}
std::unique_ptr<TransportClientSocket> CreateTransportClientSocket(
const AddressList&,
std::unique_ptr<SocketPerformanceWatcher>,
NetLog*,
const NetLogSource&) override {
NOTIMPLEMENTED();
return nullptr;
}
std::unique_ptr<SSLClientSocket> CreateSSLClientSocket(
SSLClientContext*,
std::unique_ptr<StreamSocket>,
const HostPortPair&,
const SSLConfig&) override {
NOTIMPLEMENTED();
return nullptr;
}
std::unique_ptr<ProxyClientSocket> CreateProxyClientSocket(
std::unique_ptr<StreamSocket> stream_socket,
const std::string& user_agent,
const HostPortPair& endpoint,
const ProxyServer& proxy_server,
HttpAuthController* http_auth_controller,
bool tunnel,
bool using_spdy,
NextProto negotiated_protocol,
ProxyDelegate* proxy_delegate,
const NetworkTrafficAnnotationTag& traffic_annotation) override {
NOTIMPLEMENTED();
return nullptr;
}
void AddMapping(const IPAddress& dst, const IPAddress& src) {
mapping_[dst] = src;
}
private:
AddressMapping mapping_;
DISALLOW_COPY_AND_ASSIGN(TestSocketFactory);
};
void OnSortComplete(AddressList* result_buf,
CompletionOnceCallback callback,
bool success,
const AddressList& result) {
EXPECT_TRUE(success);
if (success)
*result_buf = result;
std::move(callback).Run(OK);
}
} // namespace
// TaskEnvironment is required to register an IPAddressObserver from the
// constructor of AddressSorterPosix.
class AddressSorterPosixTest : public TestWithTaskEnvironment {
protected:
AddressSorterPosixTest() : sorter_(&socket_factory_) {}
void AddMapping(const std::string& dst, const std::string& src) {
socket_factory_.AddMapping(ParseIP(dst), ParseIP(src));
}
AddressSorterPosix::SourceAddressInfo* GetSourceInfo(
const std::string& addr) {
IPAddress address = ParseIP(addr);
AddressSorterPosix::SourceAddressInfo* info = &sorter_.source_map_[address];
if (info->scope == AddressSorterPosix::SCOPE_UNDEFINED)
sorter_.FillPolicy(address, info);
return info;
}
// Verify that NULL-terminated |addresses| matches (-1)-terminated |order|
// after sorting.
void Verify(const char* const addresses[], const int order[]) {
AddressList list;
for (const char* const* addr = addresses; *addr != NULL; ++addr)
list.push_back(IPEndPoint(ParseIP(*addr), 80));
for (size_t i = 0; order[i] >= 0; ++i)
CHECK_LT(order[i], static_cast<int>(list.size()));
AddressList result;
TestCompletionCallback callback;
sorter_.Sort(list,
base::BindOnce(&OnSortComplete, &result, callback.callback()));
callback.WaitForResult();
for (size_t i = 0; (i < result.size()) || (order[i] >= 0); ++i) {
IPEndPoint expected = order[i] >= 0 ? list[order[i]] : IPEndPoint();
IPEndPoint actual = i < result.size() ? result[i] : IPEndPoint();
EXPECT_TRUE(expected.address() == actual.address()) <<
"Address out of order at position " << i << "\n" <<
" Actual: " << actual.ToStringWithoutPort() << "\n" <<
"Expected: " << expected.ToStringWithoutPort();
}
}
TestSocketFactory socket_factory_;
AddressSorterPosix sorter_;
};
// Rule 1: Avoid unusable destinations.
TEST_F(AddressSorterPosixTest, Rule1) {
AddMapping("10.0.0.231", "10.0.0.1");
const char* const addresses[] = { "::1", "10.0.0.231", "127.0.0.1", NULL };
const int order[] = { 1, -1 };
Verify(addresses, order);
}
// Rule 2: Prefer matching scope.
TEST_F(AddressSorterPosixTest, Rule2) {
AddMapping("3002::1", "4000::10"); // matching global
AddMapping("ff32::1", "fe81::10"); // matching link-local
AddMapping("fec1::1", "fec1::10"); // matching node-local
AddMapping("3002::2", "::1"); // global vs. link-local
AddMapping("fec1::2", "fe81::10"); // site-local vs. link-local
AddMapping("8.0.0.1", "169.254.0.10"); // global vs. link-local
// In all three cases, matching scope is preferred.
const int order[] = { 1, 0, -1 };
const char* const addresses1[] = { "3002::2", "3002::1", NULL };
Verify(addresses1, order);
const char* const addresses2[] = { "fec1::2", "ff32::1", NULL };
Verify(addresses2, order);
const char* const addresses3[] = { "8.0.0.1", "fec1::1", NULL };
Verify(addresses3, order);
}
// Rule 3: Avoid deprecated addresses.
TEST_F(AddressSorterPosixTest, Rule3) {
// Matching scope.
AddMapping("3002::1", "4000::10");
GetSourceInfo("4000::10")->deprecated = true;
AddMapping("3002::2", "4000::20");
const char* const addresses[] = { "3002::1", "3002::2", NULL };
const int order[] = { 1, 0, -1 };
Verify(addresses, order);
}
// Rule 4: Prefer home addresses.
TEST_F(AddressSorterPosixTest, Rule4) {
AddMapping("3002::1", "4000::10");
AddMapping("3002::2", "4000::20");
GetSourceInfo("4000::20")->home = true;
const char* const addresses[] = { "3002::1", "3002::2", NULL };
const int order[] = { 1, 0, -1 };
Verify(addresses, order);
}
// Rule 5: Prefer matching label.
TEST_F(AddressSorterPosixTest, Rule5) {
AddMapping("::1", "::1"); // matching loopback
AddMapping("::ffff:1234:1", "::ffff:1234:10"); // matching IPv4-mapped
AddMapping("2001::1", "::ffff:1234:10"); // Teredo vs. IPv4-mapped
AddMapping("2002::1", "2001::10"); // 6to4 vs. Teredo
const int order[] = { 1, 0, -1 };
{
const char* const addresses[] = { "2001::1", "::1", NULL };
Verify(addresses, order);
}
{
const char* const addresses[] = { "2002::1", "::ffff:1234:1", NULL };
Verify(addresses, order);
}
}
// Rule 6: Prefer higher precedence.
TEST_F(AddressSorterPosixTest, Rule6) {
AddMapping("::1", "::1"); // loopback
AddMapping("ff32::1", "fe81::10"); // multicast
AddMapping("::ffff:1234:1", "::ffff:1234:10"); // IPv4-mapped
AddMapping("2001::1", "2001::10"); // Teredo
const char* const addresses[] = { "2001::1", "::ffff:1234:1", "ff32::1",
"::1", NULL };
const int order[] = { 3, 2, 1, 0, -1 };
Verify(addresses, order);
}
// Rule 7: Prefer native transport.
TEST_F(AddressSorterPosixTest, Rule7) {
AddMapping("3002::1", "4000::10");
AddMapping("3002::2", "4000::20");
GetSourceInfo("4000::20")->native = true;
const char* const addresses[] = { "3002::1", "3002::2", NULL };
const int order[] = { 1, 0, -1 };
Verify(addresses, order);
}
// Rule 8: Prefer smaller scope.
TEST_F(AddressSorterPosixTest, Rule8) {
// Matching scope. Should precede the others by Rule 2.
AddMapping("fe81::1", "fe81::10"); // link-local
AddMapping("3000::1", "4000::10"); // global
// Mismatched scope.
AddMapping("ff32::1", "4000::10"); // link-local
AddMapping("ff35::1", "4000::10"); // site-local
AddMapping("ff38::1", "4000::10"); // org-local
const char* const addresses[] = { "ff38::1", "3000::1", "ff35::1", "ff32::1",
"fe81::1", NULL };
const int order[] = { 4, 1, 3, 2, 0, -1 };
Verify(addresses, order);
}
// Rule 9: Use longest matching prefix.
TEST_F(AddressSorterPosixTest, Rule9) {
AddMapping("3000::1", "3000:ffff::10"); // 16 bit match
GetSourceInfo("3000:ffff::10")->prefix_length = 16;
AddMapping("4000::1", "4000::10"); // 123 bit match, limited to 15
GetSourceInfo("4000::10")->prefix_length = 15;
AddMapping("4002::1", "4000::10"); // 14 bit match
AddMapping("4080::1", "4000::10"); // 8 bit match
const char* const addresses[] = { "4080::1", "4002::1", "4000::1", "3000::1",
NULL };
const int order[] = { 3, 2, 1, 0, -1 };
Verify(addresses, order);
}
// Rule 10: Leave the order unchanged.
TEST_F(AddressSorterPosixTest, Rule10) {
AddMapping("4000::1", "4000::10");
AddMapping("4000::2", "4000::10");
AddMapping("4000::3", "4000::10");
const char* const addresses[] = { "4000::1", "4000::2", "4000::3", NULL };
const int order[] = { 0, 1, 2, -1 };
Verify(addresses, order);
}
TEST_F(AddressSorterPosixTest, MultipleRules) {
AddMapping("::1", "::1"); // loopback
AddMapping("ff32::1", "fe81::10"); // link-local multicast
AddMapping("ff3e::1", "4000::10"); // global multicast
AddMapping("4000::1", "4000::10"); // global unicast
AddMapping("ff32::2", "fe81::20"); // deprecated link-local multicast
GetSourceInfo("fe81::20")->deprecated = true;
const char* const addresses[] = { "ff3e::1", "ff32::2", "4000::1", "ff32::1",
"::1", "8.0.0.1", NULL };
const int order[] = { 4, 3, 0, 2, 1, -1 };
Verify(addresses, order);
}
} // namespace net