1 /*
2 * Copyright 2006 The WebRTC Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include <math.h>
12 #include <time.h>
13 #if defined(WEBRTC_POSIX)
14 #include <netinet/in.h>
15 #endif
16
17 #include <memory>
18
19 #include "rtc_base/arraysize.h"
20 #include "rtc_base/fakeclock.h"
21 #include "rtc_base/gunit.h"
22 #include "rtc_base/logging.h"
23 #include "rtc_base/ptr_util.h"
24 #include "rtc_base/testclient.h"
25 #include "rtc_base/testutils.h"
26 #include "rtc_base/thread.h"
27 #include "rtc_base/timeutils.h"
28 #include "rtc_base/virtualsocketserver.h"
29
30 using namespace rtc;
31
32 using webrtc::testing::SSE_CLOSE;
33 using webrtc::testing::SSE_ERROR;
34 using webrtc::testing::SSE_OPEN;
35 using webrtc::testing::SSE_READ;
36 using webrtc::testing::SSE_WRITE;
37 using webrtc::testing::StreamSink;
38
39 // Sends at a constant rate but with random packet sizes.
40 struct Sender : public MessageHandler {
SenderSender41 Sender(Thread* th, AsyncSocket* s, uint32_t rt)
42 : thread(th),
43 socket(MakeUnique<AsyncUDPSocket>(s)),
44 done(false),
45 rate(rt),
46 count(0) {
47 last_send = rtc::TimeMillis();
48 thread->PostDelayed(RTC_FROM_HERE, NextDelay(), this, 1);
49 }
50
NextDelaySender51 uint32_t NextDelay() {
52 uint32_t size = (rand() % 4096) + 1;
53 return 1000 * size / rate;
54 }
55
OnMessageSender56 void OnMessage(Message* pmsg) override {
57 ASSERT_EQ(1u, pmsg->message_id);
58
59 if (done)
60 return;
61
62 int64_t cur_time = rtc::TimeMillis();
63 int64_t delay = cur_time - last_send;
64 uint32_t size = static_cast<uint32_t>(rate * delay / 1000);
65 size = std::min<uint32_t>(size, 4096);
66 size = std::max<uint32_t>(size, sizeof(uint32_t));
67
68 count += size;
69 memcpy(dummy, &cur_time, sizeof(cur_time));
70 socket->Send(dummy, size, options);
71
72 last_send = cur_time;
73 thread->PostDelayed(RTC_FROM_HERE, NextDelay(), this, 1);
74 }
75
76 Thread* thread;
77 std::unique_ptr<AsyncUDPSocket> socket;
78 rtc::PacketOptions options;
79 bool done;
80 uint32_t rate; // bytes per second
81 uint32_t count;
82 int64_t last_send;
83 char dummy[4096];
84 };
85
86 struct Receiver : public MessageHandler, public sigslot::has_slots<> {
ReceiverReceiver87 Receiver(Thread* th, AsyncSocket* s, uint32_t bw)
88 : thread(th),
89 socket(MakeUnique<AsyncUDPSocket>(s)),
90 bandwidth(bw),
91 done(false),
92 count(0),
93 sec_count(0),
94 sum(0),
95 sum_sq(0),
96 samples(0) {
97 socket->SignalReadPacket.connect(this, &Receiver::OnReadPacket);
98 thread->PostDelayed(RTC_FROM_HERE, 1000, this, 1);
99 }
100
~ReceiverReceiver101 ~Receiver() override { thread->Clear(this); }
102
OnReadPacketReceiver103 void OnReadPacket(AsyncPacketSocket* s, const char* data, size_t size,
104 const SocketAddress& remote_addr,
105 const PacketTime& packet_time) {
106 ASSERT_EQ(socket.get(), s);
107 ASSERT_GE(size, 4U);
108
109 count += size;
110 sec_count += size;
111
112 uint32_t send_time = *reinterpret_cast<const uint32_t*>(data);
113 uint32_t recv_time = rtc::TimeMillis();
114 uint32_t delay = recv_time - send_time;
115 sum += delay;
116 sum_sq += delay * delay;
117 samples += 1;
118 }
119
OnMessageReceiver120 void OnMessage(Message* pmsg) override {
121 ASSERT_EQ(1u, pmsg->message_id);
122
123 if (done)
124 return;
125
126 // It is always possible for us to receive more than expected because
127 // packets can be further delayed in delivery.
128 if (bandwidth > 0)
129 ASSERT_TRUE(sec_count <= 5 * bandwidth / 4);
130 sec_count = 0;
131 thread->PostDelayed(RTC_FROM_HERE, 1000, this, 1);
132 }
133
134 Thread* thread;
135 std::unique_ptr<AsyncUDPSocket> socket;
136 uint32_t bandwidth;
137 bool done;
138 size_t count;
139 size_t sec_count;
140 double sum;
141 double sum_sq;
142 uint32_t samples;
143 };
144
145 // Note: This test uses a fake clock in addition to a virtual network.
146 class VirtualSocketServerTest : public testing::Test {
147 public:
VirtualSocketServerTest()148 VirtualSocketServerTest()
149 : ss_(&fake_clock_),
150 thread_(&ss_),
151 kIPv4AnyAddress(IPAddress(INADDR_ANY), 0),
152 kIPv6AnyAddress(IPAddress(in6addr_any), 0) {}
153
CheckPortIncrementalization(const SocketAddress & post,const SocketAddress & pre)154 void CheckPortIncrementalization(const SocketAddress& post,
155 const SocketAddress& pre) {
156 EXPECT_EQ(post.port(), pre.port() + 1);
157 IPAddress post_ip = post.ipaddr();
158 IPAddress pre_ip = pre.ipaddr();
159 EXPECT_EQ(pre_ip.family(), post_ip.family());
160 if (post_ip.family() == AF_INET) {
161 in_addr pre_ipv4 = pre_ip.ipv4_address();
162 in_addr post_ipv4 = post_ip.ipv4_address();
163 EXPECT_EQ(post_ipv4.s_addr, pre_ipv4.s_addr);
164 } else if (post_ip.family() == AF_INET6) {
165 in6_addr post_ip6 = post_ip.ipv6_address();
166 in6_addr pre_ip6 = pre_ip.ipv6_address();
167 uint32_t* post_as_ints = reinterpret_cast<uint32_t*>(&post_ip6.s6_addr);
168 uint32_t* pre_as_ints = reinterpret_cast<uint32_t*>(&pre_ip6.s6_addr);
169 EXPECT_EQ(post_as_ints[3], pre_as_ints[3]);
170 }
171 }
172
173 // Test a client can bind to the any address, and all sent packets will have
174 // the default route as the source address. Also, it can receive packets sent
175 // to the default route.
TestDefaultRoute(const IPAddress & default_route)176 void TestDefaultRoute(const IPAddress& default_route) {
177 ss_.SetDefaultRoute(default_route);
178
179 // Create client1 bound to the any address.
180 AsyncSocket* socket =
181 ss_.CreateAsyncSocket(default_route.family(), SOCK_DGRAM);
182 socket->Bind(EmptySocketAddressWithFamily(default_route.family()));
183 SocketAddress client1_any_addr = socket->GetLocalAddress();
184 EXPECT_TRUE(client1_any_addr.IsAnyIP());
185 auto client1 = MakeUnique<TestClient>(MakeUnique<AsyncUDPSocket>(socket),
186 &fake_clock_);
187
188 // Create client2 bound to the default route.
189 AsyncSocket* socket2 =
190 ss_.CreateAsyncSocket(default_route.family(), SOCK_DGRAM);
191 socket2->Bind(SocketAddress(default_route, 0));
192 SocketAddress client2_addr = socket2->GetLocalAddress();
193 EXPECT_FALSE(client2_addr.IsAnyIP());
194 auto client2 = MakeUnique<TestClient>(MakeUnique<AsyncUDPSocket>(socket2),
195 &fake_clock_);
196
197 // Client1 sends to client2, client2 should see the default route as
198 // client1's address.
199 SocketAddress client1_addr;
200 EXPECT_EQ(6, client1->SendTo("bizbaz", 6, client2_addr));
201 EXPECT_TRUE(client2->CheckNextPacket("bizbaz", 6, &client1_addr));
202 EXPECT_EQ(client1_addr,
203 SocketAddress(default_route, client1_any_addr.port()));
204
205 // Client2 can send back to client1's default route address.
206 EXPECT_EQ(3, client2->SendTo("foo", 3, client1_addr));
207 EXPECT_TRUE(client1->CheckNextPacket("foo", 3, &client2_addr));
208 }
209
BasicTest(const SocketAddress & initial_addr)210 void BasicTest(const SocketAddress& initial_addr) {
211 AsyncSocket* socket =
212 ss_.CreateAsyncSocket(initial_addr.family(), SOCK_DGRAM);
213 socket->Bind(initial_addr);
214 SocketAddress server_addr = socket->GetLocalAddress();
215 // Make sure VSS didn't switch families on us.
216 EXPECT_EQ(server_addr.family(), initial_addr.family());
217
218 auto client1 = MakeUnique<TestClient>(MakeUnique<AsyncUDPSocket>(socket),
219 &fake_clock_);
220 AsyncSocket* socket2 =
221 ss_.CreateAsyncSocket(initial_addr.family(), SOCK_DGRAM);
222 auto client2 = MakeUnique<TestClient>(MakeUnique<AsyncUDPSocket>(socket2),
223 &fake_clock_);
224
225 SocketAddress client2_addr;
226 EXPECT_EQ(3, client2->SendTo("foo", 3, server_addr));
227 EXPECT_TRUE(client1->CheckNextPacket("foo", 3, &client2_addr));
228
229 SocketAddress client1_addr;
230 EXPECT_EQ(6, client1->SendTo("bizbaz", 6, client2_addr));
231 EXPECT_TRUE(client2->CheckNextPacket("bizbaz", 6, &client1_addr));
232 EXPECT_EQ(client1_addr, server_addr);
233
234 SocketAddress empty = EmptySocketAddressWithFamily(initial_addr.family());
235 for (int i = 0; i < 10; i++) {
236 client2 = MakeUnique<TestClient>(
237 WrapUnique(AsyncUDPSocket::Create(&ss_, empty)), &fake_clock_);
238
239 SocketAddress next_client2_addr;
240 EXPECT_EQ(3, client2->SendTo("foo", 3, server_addr));
241 EXPECT_TRUE(client1->CheckNextPacket("foo", 3, &next_client2_addr));
242 CheckPortIncrementalization(next_client2_addr, client2_addr);
243 // EXPECT_EQ(next_client2_addr.port(), client2_addr.port() + 1);
244
245 SocketAddress server_addr2;
246 EXPECT_EQ(6, client1->SendTo("bizbaz", 6, next_client2_addr));
247 EXPECT_TRUE(client2->CheckNextPacket("bizbaz", 6, &server_addr2));
248 EXPECT_EQ(server_addr2, server_addr);
249
250 client2_addr = next_client2_addr;
251 }
252 }
253
254 // initial_addr should be made from either INADDR_ANY or in6addr_any.
ConnectTest(const SocketAddress & initial_addr)255 void ConnectTest(const SocketAddress& initial_addr) {
256 StreamSink sink;
257 SocketAddress accept_addr;
258 const SocketAddress kEmptyAddr =
259 EmptySocketAddressWithFamily(initial_addr.family());
260
261 // Create client
262 std::unique_ptr<AsyncSocket> client =
263 WrapUnique(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
264 sink.Monitor(client.get());
265 EXPECT_EQ(client->GetState(), AsyncSocket::CS_CLOSED);
266 EXPECT_TRUE(client->GetLocalAddress().IsNil());
267
268 // Create server
269 std::unique_ptr<AsyncSocket> server =
270 WrapUnique(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
271 sink.Monitor(server.get());
272 EXPECT_NE(0, server->Listen(5)); // Bind required
273 EXPECT_EQ(0, server->Bind(initial_addr));
274 EXPECT_EQ(server->GetLocalAddress().family(), initial_addr.family());
275 EXPECT_EQ(0, server->Listen(5));
276 EXPECT_EQ(server->GetState(), AsyncSocket::CS_CONNECTING);
277
278 // No pending server connections
279 EXPECT_FALSE(sink.Check(server.get(), SSE_READ));
280 EXPECT_TRUE(nullptr == server->Accept(&accept_addr));
281 EXPECT_EQ(AF_UNSPEC, accept_addr.family());
282
283 // Attempt connect to listening socket
284 EXPECT_EQ(0, client->Connect(server->GetLocalAddress()));
285 EXPECT_NE(client->GetLocalAddress(), kEmptyAddr); // Implicit Bind
286 EXPECT_NE(AF_UNSPEC, client->GetLocalAddress().family()); // Implicit Bind
287 EXPECT_NE(client->GetLocalAddress(), server->GetLocalAddress());
288
289 // Client is connecting
290 EXPECT_EQ(client->GetState(), AsyncSocket::CS_CONNECTING);
291 EXPECT_FALSE(sink.Check(client.get(), SSE_OPEN));
292 EXPECT_FALSE(sink.Check(client.get(), SSE_CLOSE));
293
294 ss_.ProcessMessagesUntilIdle();
295
296 // Client still connecting
297 EXPECT_EQ(client->GetState(), AsyncSocket::CS_CONNECTING);
298 EXPECT_FALSE(sink.Check(client.get(), SSE_OPEN));
299 EXPECT_FALSE(sink.Check(client.get(), SSE_CLOSE));
300
301 // Server has pending connection
302 EXPECT_TRUE(sink.Check(server.get(), SSE_READ));
303 std::unique_ptr<Socket> accepted = WrapUnique(server->Accept(&accept_addr));
304 EXPECT_TRUE(nullptr != accepted);
305 EXPECT_NE(accept_addr, kEmptyAddr);
306 EXPECT_EQ(accepted->GetRemoteAddress(), accept_addr);
307
308 EXPECT_EQ(accepted->GetState(), AsyncSocket::CS_CONNECTED);
309 EXPECT_EQ(accepted->GetLocalAddress(), server->GetLocalAddress());
310 EXPECT_EQ(accepted->GetRemoteAddress(), client->GetLocalAddress());
311
312 ss_.ProcessMessagesUntilIdle();
313
314 // Client has connected
315 EXPECT_EQ(client->GetState(), AsyncSocket::CS_CONNECTED);
316 EXPECT_TRUE(sink.Check(client.get(), SSE_OPEN));
317 EXPECT_FALSE(sink.Check(client.get(), SSE_CLOSE));
318 EXPECT_EQ(client->GetRemoteAddress(), server->GetLocalAddress());
319 EXPECT_EQ(client->GetRemoteAddress(), accepted->GetLocalAddress());
320 }
321
ConnectToNonListenerTest(const SocketAddress & initial_addr)322 void ConnectToNonListenerTest(const SocketAddress& initial_addr) {
323 StreamSink sink;
324 SocketAddress accept_addr;
325 const SocketAddress nil_addr;
326 const SocketAddress empty_addr =
327 EmptySocketAddressWithFamily(initial_addr.family());
328
329 // Create client
330 std::unique_ptr<AsyncSocket> client =
331 WrapUnique(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
332 sink.Monitor(client.get());
333
334 // Create server
335 std::unique_ptr<AsyncSocket> server =
336 WrapUnique(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
337 sink.Monitor(server.get());
338 EXPECT_EQ(0, server->Bind(initial_addr));
339 EXPECT_EQ(server->GetLocalAddress().family(), initial_addr.family());
340 // Attempt connect to non-listening socket
341 EXPECT_EQ(0, client->Connect(server->GetLocalAddress()));
342
343 ss_.ProcessMessagesUntilIdle();
344
345 // No pending server connections
346 EXPECT_FALSE(sink.Check(server.get(), SSE_READ));
347 EXPECT_TRUE(nullptr == server->Accept(&accept_addr));
348 EXPECT_EQ(accept_addr, nil_addr);
349
350 // Connection failed
351 EXPECT_EQ(client->GetState(), AsyncSocket::CS_CLOSED);
352 EXPECT_FALSE(sink.Check(client.get(), SSE_OPEN));
353 EXPECT_TRUE(sink.Check(client.get(), SSE_ERROR));
354 EXPECT_EQ(client->GetRemoteAddress(), nil_addr);
355 }
356
CloseDuringConnectTest(const SocketAddress & initial_addr)357 void CloseDuringConnectTest(const SocketAddress& initial_addr) {
358 StreamSink sink;
359 SocketAddress accept_addr;
360 const SocketAddress empty_addr =
361 EmptySocketAddressWithFamily(initial_addr.family());
362
363 // Create client and server
364 std::unique_ptr<AsyncSocket> client(
365 ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
366 sink.Monitor(client.get());
367 std::unique_ptr<AsyncSocket> server(
368 ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
369 sink.Monitor(server.get());
370
371 // Initiate connect
372 EXPECT_EQ(0, server->Bind(initial_addr));
373 EXPECT_EQ(server->GetLocalAddress().family(), initial_addr.family());
374
375 EXPECT_EQ(0, server->Listen(5));
376 EXPECT_EQ(0, client->Connect(server->GetLocalAddress()));
377
378 // Server close before socket enters accept queue
379 EXPECT_FALSE(sink.Check(server.get(), SSE_READ));
380 server->Close();
381
382 ss_.ProcessMessagesUntilIdle();
383
384 // Result: connection failed
385 EXPECT_EQ(client->GetState(), AsyncSocket::CS_CLOSED);
386 EXPECT_TRUE(sink.Check(client.get(), SSE_ERROR));
387
388 server.reset(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
389 sink.Monitor(server.get());
390
391 // Initiate connect
392 EXPECT_EQ(0, server->Bind(initial_addr));
393 EXPECT_EQ(server->GetLocalAddress().family(), initial_addr.family());
394
395 EXPECT_EQ(0, server->Listen(5));
396 EXPECT_EQ(0, client->Connect(server->GetLocalAddress()));
397
398 ss_.ProcessMessagesUntilIdle();
399
400 // Server close while socket is in accept queue
401 EXPECT_TRUE(sink.Check(server.get(), SSE_READ));
402 server->Close();
403
404 ss_.ProcessMessagesUntilIdle();
405
406 // Result: connection failed
407 EXPECT_EQ(client->GetState(), AsyncSocket::CS_CLOSED);
408 EXPECT_TRUE(sink.Check(client.get(), SSE_ERROR));
409
410 // New server
411 server.reset(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
412 sink.Monitor(server.get());
413
414 // Initiate connect
415 EXPECT_EQ(0, server->Bind(initial_addr));
416 EXPECT_EQ(server->GetLocalAddress().family(), initial_addr.family());
417
418 EXPECT_EQ(0, server->Listen(5));
419 EXPECT_EQ(0, client->Connect(server->GetLocalAddress()));
420
421 ss_.ProcessMessagesUntilIdle();
422
423 // Server accepts connection
424 EXPECT_TRUE(sink.Check(server.get(), SSE_READ));
425 std::unique_ptr<AsyncSocket> accepted(server->Accept(&accept_addr));
426 ASSERT_TRUE(nullptr != accepted.get());
427 sink.Monitor(accepted.get());
428
429 // Client closes before connection complets
430 EXPECT_EQ(accepted->GetState(), AsyncSocket::CS_CONNECTED);
431
432 // Connected message has not been processed yet.
433 EXPECT_EQ(client->GetState(), AsyncSocket::CS_CONNECTING);
434 client->Close();
435
436 ss_.ProcessMessagesUntilIdle();
437
438 // Result: accepted socket closes
439 EXPECT_EQ(accepted->GetState(), AsyncSocket::CS_CLOSED);
440 EXPECT_TRUE(sink.Check(accepted.get(), SSE_CLOSE));
441 EXPECT_FALSE(sink.Check(client.get(), SSE_CLOSE));
442 }
443
CloseTest(const SocketAddress & initial_addr)444 void CloseTest(const SocketAddress& initial_addr) {
445 StreamSink sink;
446 const SocketAddress kEmptyAddr;
447
448 // Create clients
449 std::unique_ptr<AsyncSocket> a =
450 WrapUnique(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
451 sink.Monitor(a.get());
452 a->Bind(initial_addr);
453 EXPECT_EQ(a->GetLocalAddress().family(), initial_addr.family());
454
455 std::unique_ptr<AsyncSocket> b =
456 WrapUnique(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
457 sink.Monitor(b.get());
458 b->Bind(initial_addr);
459 EXPECT_EQ(b->GetLocalAddress().family(), initial_addr.family());
460
461 EXPECT_EQ(0, a->Connect(b->GetLocalAddress()));
462 EXPECT_EQ(0, b->Connect(a->GetLocalAddress()));
463
464 ss_.ProcessMessagesUntilIdle();
465
466 EXPECT_TRUE(sink.Check(a.get(), SSE_OPEN));
467 EXPECT_EQ(a->GetState(), AsyncSocket::CS_CONNECTED);
468 EXPECT_EQ(a->GetRemoteAddress(), b->GetLocalAddress());
469
470 EXPECT_TRUE(sink.Check(b.get(), SSE_OPEN));
471 EXPECT_EQ(b->GetState(), AsyncSocket::CS_CONNECTED);
472 EXPECT_EQ(b->GetRemoteAddress(), a->GetLocalAddress());
473
474 EXPECT_EQ(1, a->Send("a", 1));
475 b->Close();
476 EXPECT_EQ(1, a->Send("b", 1));
477
478 ss_.ProcessMessagesUntilIdle();
479
480 char buffer[10];
481 EXPECT_FALSE(sink.Check(b.get(), SSE_READ));
482 EXPECT_EQ(-1, b->Recv(buffer, 10, nullptr));
483
484 EXPECT_TRUE(sink.Check(a.get(), SSE_CLOSE));
485 EXPECT_EQ(a->GetState(), AsyncSocket::CS_CLOSED);
486 EXPECT_EQ(a->GetRemoteAddress(), kEmptyAddr);
487
488 // No signal for Closer
489 EXPECT_FALSE(sink.Check(b.get(), SSE_CLOSE));
490 EXPECT_EQ(b->GetState(), AsyncSocket::CS_CLOSED);
491 EXPECT_EQ(b->GetRemoteAddress(), kEmptyAddr);
492 }
493
TcpSendTest(const SocketAddress & initial_addr)494 void TcpSendTest(const SocketAddress& initial_addr) {
495 StreamSink sink;
496 const SocketAddress kEmptyAddr;
497
498 // Connect two sockets
499 std::unique_ptr<AsyncSocket> a =
500 WrapUnique(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
501 sink.Monitor(a.get());
502 a->Bind(initial_addr);
503 EXPECT_EQ(a->GetLocalAddress().family(), initial_addr.family());
504
505 std::unique_ptr<AsyncSocket> b =
506 WrapUnique(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
507 sink.Monitor(b.get());
508 b->Bind(initial_addr);
509 EXPECT_EQ(b->GetLocalAddress().family(), initial_addr.family());
510
511 EXPECT_EQ(0, a->Connect(b->GetLocalAddress()));
512 EXPECT_EQ(0, b->Connect(a->GetLocalAddress()));
513
514 ss_.ProcessMessagesUntilIdle();
515
516 const size_t kBufferSize = 2000;
517 ss_.set_send_buffer_capacity(kBufferSize);
518 ss_.set_recv_buffer_capacity(kBufferSize);
519
520 const size_t kDataSize = 5000;
521 char send_buffer[kDataSize], recv_buffer[kDataSize];
522 for (size_t i = 0; i < kDataSize; ++i)
523 send_buffer[i] = static_cast<char>(i % 256);
524 memset(recv_buffer, 0, sizeof(recv_buffer));
525 size_t send_pos = 0, recv_pos = 0;
526
527 // Can't send more than send buffer in one write
528 int result = a->Send(send_buffer + send_pos, kDataSize - send_pos);
529 EXPECT_EQ(static_cast<int>(kBufferSize), result);
530 send_pos += result;
531
532 ss_.ProcessMessagesUntilIdle();
533 EXPECT_FALSE(sink.Check(a.get(), SSE_WRITE));
534 EXPECT_TRUE(sink.Check(b.get(), SSE_READ));
535
536 // Receive buffer is already filled, fill send buffer again
537 result = a->Send(send_buffer + send_pos, kDataSize - send_pos);
538 EXPECT_EQ(static_cast<int>(kBufferSize), result);
539 send_pos += result;
540
541 ss_.ProcessMessagesUntilIdle();
542 EXPECT_FALSE(sink.Check(a.get(), SSE_WRITE));
543 EXPECT_FALSE(sink.Check(b.get(), SSE_READ));
544
545 // No more room in send or receive buffer
546 result = a->Send(send_buffer + send_pos, kDataSize - send_pos);
547 EXPECT_EQ(-1, result);
548 EXPECT_TRUE(a->IsBlocking());
549
550 // Read a subset of the data
551 result = b->Recv(recv_buffer + recv_pos, 500, nullptr);
552 EXPECT_EQ(500, result);
553 recv_pos += result;
554
555 ss_.ProcessMessagesUntilIdle();
556 EXPECT_TRUE(sink.Check(a.get(), SSE_WRITE));
557 EXPECT_TRUE(sink.Check(b.get(), SSE_READ));
558
559 // Room for more on the sending side
560 result = a->Send(send_buffer + send_pos, kDataSize - send_pos);
561 EXPECT_EQ(500, result);
562 send_pos += result;
563
564 // Empty the recv buffer
565 while (true) {
566 result = b->Recv(recv_buffer + recv_pos, kDataSize - recv_pos, nullptr);
567 if (result < 0) {
568 EXPECT_EQ(-1, result);
569 EXPECT_TRUE(b->IsBlocking());
570 break;
571 }
572 recv_pos += result;
573 }
574
575 ss_.ProcessMessagesUntilIdle();
576 EXPECT_TRUE(sink.Check(b.get(), SSE_READ));
577
578 // Continue to empty the recv buffer
579 while (true) {
580 result = b->Recv(recv_buffer + recv_pos, kDataSize - recv_pos, nullptr);
581 if (result < 0) {
582 EXPECT_EQ(-1, result);
583 EXPECT_TRUE(b->IsBlocking());
584 break;
585 }
586 recv_pos += result;
587 }
588
589 // Send last of the data
590 result = a->Send(send_buffer + send_pos, kDataSize - send_pos);
591 EXPECT_EQ(500, result);
592 send_pos += result;
593
594 ss_.ProcessMessagesUntilIdle();
595 EXPECT_TRUE(sink.Check(b.get(), SSE_READ));
596
597 // Receive the last of the data
598 while (true) {
599 result = b->Recv(recv_buffer + recv_pos, kDataSize - recv_pos, nullptr);
600 if (result < 0) {
601 EXPECT_EQ(-1, result);
602 EXPECT_TRUE(b->IsBlocking());
603 break;
604 }
605 recv_pos += result;
606 }
607
608 ss_.ProcessMessagesUntilIdle();
609 EXPECT_FALSE(sink.Check(b.get(), SSE_READ));
610
611 // The received data matches the sent data
612 EXPECT_EQ(kDataSize, send_pos);
613 EXPECT_EQ(kDataSize, recv_pos);
614 EXPECT_EQ(0, memcmp(recv_buffer, send_buffer, kDataSize));
615 }
616
TcpSendsPacketsInOrderTest(const SocketAddress & initial_addr)617 void TcpSendsPacketsInOrderTest(const SocketAddress& initial_addr) {
618 const SocketAddress kEmptyAddr;
619
620 // Connect two sockets
621 std::unique_ptr<AsyncSocket> a =
622 WrapUnique(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
623 std::unique_ptr<AsyncSocket> b =
624 WrapUnique(ss_.CreateAsyncSocket(initial_addr.family(), SOCK_STREAM));
625 a->Bind(initial_addr);
626 EXPECT_EQ(a->GetLocalAddress().family(), initial_addr.family());
627
628 b->Bind(initial_addr);
629 EXPECT_EQ(b->GetLocalAddress().family(), initial_addr.family());
630
631 EXPECT_EQ(0, a->Connect(b->GetLocalAddress()));
632 EXPECT_EQ(0, b->Connect(a->GetLocalAddress()));
633 ss_.ProcessMessagesUntilIdle();
634
635 // First, deliver all packets in 0 ms.
636 char buffer[2] = { 0, 0 };
637 const char cNumPackets = 10;
638 for (char i = 0; i < cNumPackets; ++i) {
639 buffer[0] = '0' + i;
640 EXPECT_EQ(1, a->Send(buffer, 1));
641 }
642
643 ss_.ProcessMessagesUntilIdle();
644
645 for (char i = 0; i < cNumPackets; ++i) {
646 EXPECT_EQ(1, b->Recv(buffer, sizeof(buffer), nullptr));
647 EXPECT_EQ(static_cast<char>('0' + i), buffer[0]);
648 }
649
650 // Next, deliver packets at random intervals
651 const uint32_t mean = 50;
652 const uint32_t stddev = 50;
653
654 ss_.set_delay_mean(mean);
655 ss_.set_delay_stddev(stddev);
656 ss_.UpdateDelayDistribution();
657
658 for (char i = 0; i < cNumPackets; ++i) {
659 buffer[0] = 'A' + i;
660 EXPECT_EQ(1, a->Send(buffer, 1));
661 }
662
663 ss_.ProcessMessagesUntilIdle();
664
665 for (char i = 0; i < cNumPackets; ++i) {
666 EXPECT_EQ(1, b->Recv(buffer, sizeof(buffer), nullptr));
667 EXPECT_EQ(static_cast<char>('A' + i), buffer[0]);
668 }
669 }
670
671 // It is important that initial_addr's port has to be 0 such that the
672 // incremental port behavior could ensure the 2 Binds result in different
673 // address.
BandwidthTest(const SocketAddress & initial_addr)674 void BandwidthTest(const SocketAddress& initial_addr) {
675 AsyncSocket* send_socket =
676 ss_.CreateAsyncSocket(initial_addr.family(), SOCK_DGRAM);
677 AsyncSocket* recv_socket =
678 ss_.CreateAsyncSocket(initial_addr.family(), SOCK_DGRAM);
679 ASSERT_EQ(0, send_socket->Bind(initial_addr));
680 ASSERT_EQ(0, recv_socket->Bind(initial_addr));
681 EXPECT_EQ(send_socket->GetLocalAddress().family(), initial_addr.family());
682 EXPECT_EQ(recv_socket->GetLocalAddress().family(), initial_addr.family());
683 ASSERT_EQ(0, send_socket->Connect(recv_socket->GetLocalAddress()));
684
685 uint32_t bandwidth = 64 * 1024;
686 ss_.set_bandwidth(bandwidth);
687
688 Thread* pthMain = Thread::Current();
689 Sender sender(pthMain, send_socket, 80 * 1024);
690 Receiver receiver(pthMain, recv_socket, bandwidth);
691
692 // Allow the sender to run for 5 (simulated) seconds, then be stopped for 5
693 // seconds.
694 SIMULATED_WAIT(false, 5000, fake_clock_);
695 sender.done = true;
696 SIMULATED_WAIT(false, 5000, fake_clock_);
697
698 // Ensure the observed bandwidth fell within a reasonable margin of error.
699 EXPECT_TRUE(receiver.count >= 5 * 3 * bandwidth / 4);
700 EXPECT_TRUE(receiver.count <= 6 * bandwidth); // queue could drain for 1s
701
702 ss_.set_bandwidth(0);
703 }
704
705 // It is important that initial_addr's port has to be 0 such that the
706 // incremental port behavior could ensure the 2 Binds result in different
707 // address.
DelayTest(const SocketAddress & initial_addr)708 void DelayTest(const SocketAddress& initial_addr) {
709 time_t seed = ::time(nullptr);
710 RTC_LOG(LS_VERBOSE) << "seed = " << seed;
711 srand(static_cast<unsigned int>(seed));
712
713 const uint32_t mean = 2000;
714 const uint32_t stddev = 500;
715
716 ss_.set_delay_mean(mean);
717 ss_.set_delay_stddev(stddev);
718 ss_.UpdateDelayDistribution();
719
720 AsyncSocket* send_socket =
721 ss_.CreateAsyncSocket(initial_addr.family(), SOCK_DGRAM);
722 AsyncSocket* recv_socket =
723 ss_.CreateAsyncSocket(initial_addr.family(), SOCK_DGRAM);
724 ASSERT_EQ(0, send_socket->Bind(initial_addr));
725 ASSERT_EQ(0, recv_socket->Bind(initial_addr));
726 EXPECT_EQ(send_socket->GetLocalAddress().family(), initial_addr.family());
727 EXPECT_EQ(recv_socket->GetLocalAddress().family(), initial_addr.family());
728 ASSERT_EQ(0, send_socket->Connect(recv_socket->GetLocalAddress()));
729
730 Thread* pthMain = Thread::Current();
731 // Avg packet size is 2K, so at 200KB/s for 10s, we should see about
732 // 1000 packets, which is necessary to get a good distribution.
733 Sender sender(pthMain, send_socket, 100 * 2 * 1024);
734 Receiver receiver(pthMain, recv_socket, 0);
735
736 // Simulate 10 seconds of packets being sent, then check the observed delay
737 // distribution.
738 SIMULATED_WAIT(false, 10000, fake_clock_);
739 sender.done = receiver.done = true;
740 ss_.ProcessMessagesUntilIdle();
741
742 const double sample_mean = receiver.sum / receiver.samples;
743 double num =
744 receiver.samples * receiver.sum_sq - receiver.sum * receiver.sum;
745 double den = receiver.samples * (receiver.samples - 1);
746 const double sample_stddev = sqrt(num / den);
747 RTC_LOG(LS_VERBOSE) << "mean=" << sample_mean
748 << " stddev=" << sample_stddev;
749
750 EXPECT_LE(500u, receiver.samples);
751 // We initially used a 0.1 fudge factor, but on the build machine, we
752 // have seen the value differ by as much as 0.13.
753 EXPECT_NEAR(mean, sample_mean, 0.15 * mean);
754 EXPECT_NEAR(stddev, sample_stddev, 0.15 * stddev);
755
756 ss_.set_delay_mean(0);
757 ss_.set_delay_stddev(0);
758 ss_.UpdateDelayDistribution();
759 }
760
761 // Test cross-family communication between a client bound to client_addr and a
762 // server bound to server_addr. shouldSucceed indicates if communication is
763 // expected to work or not.
CrossFamilyConnectionTest(const SocketAddress & client_addr,const SocketAddress & server_addr,bool shouldSucceed)764 void CrossFamilyConnectionTest(const SocketAddress& client_addr,
765 const SocketAddress& server_addr,
766 bool shouldSucceed) {
767 StreamSink sink;
768 SocketAddress accept_address;
769 const SocketAddress kEmptyAddr;
770
771 // Client gets a IPv4 address
772 std::unique_ptr<AsyncSocket> client =
773 WrapUnique(ss_.CreateAsyncSocket(client_addr.family(), SOCK_STREAM));
774 sink.Monitor(client.get());
775 EXPECT_EQ(client->GetState(), AsyncSocket::CS_CLOSED);
776 EXPECT_EQ(client->GetLocalAddress(), kEmptyAddr);
777 client->Bind(client_addr);
778
779 // Server gets a non-mapped non-any IPv6 address.
780 // IPv4 sockets should not be able to connect to this.
781 std::unique_ptr<AsyncSocket> server =
782 WrapUnique(ss_.CreateAsyncSocket(server_addr.family(), SOCK_STREAM));
783 sink.Monitor(server.get());
784 server->Bind(server_addr);
785 server->Listen(5);
786
787 if (shouldSucceed) {
788 EXPECT_EQ(0, client->Connect(server->GetLocalAddress()));
789 ss_.ProcessMessagesUntilIdle();
790 EXPECT_TRUE(sink.Check(server.get(), SSE_READ));
791 std::unique_ptr<Socket> accepted =
792 WrapUnique(server->Accept(&accept_address));
793 EXPECT_TRUE(nullptr != accepted);
794 EXPECT_NE(kEmptyAddr, accept_address);
795 ss_.ProcessMessagesUntilIdle();
796 EXPECT_TRUE(sink.Check(client.get(), SSE_OPEN));
797 EXPECT_EQ(client->GetRemoteAddress(), server->GetLocalAddress());
798 } else {
799 // Check that the connection failed.
800 EXPECT_EQ(-1, client->Connect(server->GetLocalAddress()));
801 ss_.ProcessMessagesUntilIdle();
802
803 EXPECT_FALSE(sink.Check(server.get(), SSE_READ));
804 EXPECT_TRUE(nullptr == server->Accept(&accept_address));
805 EXPECT_EQ(accept_address, kEmptyAddr);
806 EXPECT_EQ(client->GetState(), AsyncSocket::CS_CLOSED);
807 EXPECT_FALSE(sink.Check(client.get(), SSE_OPEN));
808 EXPECT_EQ(client->GetRemoteAddress(), kEmptyAddr);
809 }
810 }
811
812 // Test cross-family datagram sending between a client bound to client_addr
813 // and a server bound to server_addr. shouldSucceed indicates if sending is
814 // expected to succeed or not.
CrossFamilyDatagramTest(const SocketAddress & client_addr,const SocketAddress & server_addr,bool shouldSucceed)815 void CrossFamilyDatagramTest(const SocketAddress& client_addr,
816 const SocketAddress& server_addr,
817 bool shouldSucceed) {
818 AsyncSocket* socket = ss_.CreateAsyncSocket(SOCK_DGRAM);
819 socket->Bind(server_addr);
820 SocketAddress bound_server_addr = socket->GetLocalAddress();
821 auto client1 = MakeUnique<TestClient>(MakeUnique<AsyncUDPSocket>(socket),
822 &fake_clock_);
823
824 AsyncSocket* socket2 = ss_.CreateAsyncSocket(SOCK_DGRAM);
825 socket2->Bind(client_addr);
826 auto client2 = MakeUnique<TestClient>(MakeUnique<AsyncUDPSocket>(socket2),
827 &fake_clock_);
828 SocketAddress client2_addr;
829
830 if (shouldSucceed) {
831 EXPECT_EQ(3, client2->SendTo("foo", 3, bound_server_addr));
832 EXPECT_TRUE(client1->CheckNextPacket("foo", 3, &client2_addr));
833 SocketAddress client1_addr;
834 EXPECT_EQ(6, client1->SendTo("bizbaz", 6, client2_addr));
835 EXPECT_TRUE(client2->CheckNextPacket("bizbaz", 6, &client1_addr));
836 EXPECT_EQ(client1_addr, bound_server_addr);
837 } else {
838 EXPECT_EQ(-1, client2->SendTo("foo", 3, bound_server_addr));
839 EXPECT_TRUE(client1->CheckNoPacket());
840 }
841 }
842
843 protected:
844 rtc::ScopedFakeClock fake_clock_;
845 VirtualSocketServer ss_;
846 AutoSocketServerThread thread_;
847 const SocketAddress kIPv4AnyAddress;
848 const SocketAddress kIPv6AnyAddress;
849 };
850
TEST_F(VirtualSocketServerTest,basic_v4)851 TEST_F(VirtualSocketServerTest, basic_v4) {
852 SocketAddress ipv4_test_addr(IPAddress(INADDR_ANY), 5000);
853 BasicTest(ipv4_test_addr);
854 }
855
TEST_F(VirtualSocketServerTest,basic_v6)856 TEST_F(VirtualSocketServerTest, basic_v6) {
857 SocketAddress ipv6_test_addr(IPAddress(in6addr_any), 5000);
858 BasicTest(ipv6_test_addr);
859 }
860
TEST_F(VirtualSocketServerTest,TestDefaultRoute_v4)861 TEST_F(VirtualSocketServerTest, TestDefaultRoute_v4) {
862 IPAddress ipv4_default_addr(0x01020304);
863 TestDefaultRoute(ipv4_default_addr);
864 }
865
TEST_F(VirtualSocketServerTest,TestDefaultRoute_v6)866 TEST_F(VirtualSocketServerTest, TestDefaultRoute_v6) {
867 IPAddress ipv6_default_addr;
868 EXPECT_TRUE(
869 IPFromString("2401:fa00:4:1000:be30:5bff:fee5:c3", &ipv6_default_addr));
870 TestDefaultRoute(ipv6_default_addr);
871 }
872
TEST_F(VirtualSocketServerTest,connect_v4)873 TEST_F(VirtualSocketServerTest, connect_v4) {
874 ConnectTest(kIPv4AnyAddress);
875 }
876
TEST_F(VirtualSocketServerTest,connect_v6)877 TEST_F(VirtualSocketServerTest, connect_v6) {
878 ConnectTest(kIPv6AnyAddress);
879 }
880
TEST_F(VirtualSocketServerTest,connect_to_non_listener_v4)881 TEST_F(VirtualSocketServerTest, connect_to_non_listener_v4) {
882 ConnectToNonListenerTest(kIPv4AnyAddress);
883 }
884
TEST_F(VirtualSocketServerTest,connect_to_non_listener_v6)885 TEST_F(VirtualSocketServerTest, connect_to_non_listener_v6) {
886 ConnectToNonListenerTest(kIPv6AnyAddress);
887 }
888
TEST_F(VirtualSocketServerTest,close_during_connect_v4)889 TEST_F(VirtualSocketServerTest, close_during_connect_v4) {
890 CloseDuringConnectTest(kIPv4AnyAddress);
891 }
892
TEST_F(VirtualSocketServerTest,close_during_connect_v6)893 TEST_F(VirtualSocketServerTest, close_during_connect_v6) {
894 CloseDuringConnectTest(kIPv6AnyAddress);
895 }
896
TEST_F(VirtualSocketServerTest,close_v4)897 TEST_F(VirtualSocketServerTest, close_v4) {
898 CloseTest(kIPv4AnyAddress);
899 }
900
TEST_F(VirtualSocketServerTest,close_v6)901 TEST_F(VirtualSocketServerTest, close_v6) {
902 CloseTest(kIPv6AnyAddress);
903 }
904
TEST_F(VirtualSocketServerTest,tcp_send_v4)905 TEST_F(VirtualSocketServerTest, tcp_send_v4) {
906 TcpSendTest(kIPv4AnyAddress);
907 }
908
TEST_F(VirtualSocketServerTest,tcp_send_v6)909 TEST_F(VirtualSocketServerTest, tcp_send_v6) {
910 TcpSendTest(kIPv6AnyAddress);
911 }
912
TEST_F(VirtualSocketServerTest,TcpSendsPacketsInOrder_v4)913 TEST_F(VirtualSocketServerTest, TcpSendsPacketsInOrder_v4) {
914 TcpSendsPacketsInOrderTest(kIPv4AnyAddress);
915 }
916
TEST_F(VirtualSocketServerTest,TcpSendsPacketsInOrder_v6)917 TEST_F(VirtualSocketServerTest, TcpSendsPacketsInOrder_v6) {
918 TcpSendsPacketsInOrderTest(kIPv6AnyAddress);
919 }
920
TEST_F(VirtualSocketServerTest,bandwidth_v4)921 TEST_F(VirtualSocketServerTest, bandwidth_v4) {
922 BandwidthTest(kIPv4AnyAddress);
923 }
924
TEST_F(VirtualSocketServerTest,bandwidth_v6)925 TEST_F(VirtualSocketServerTest, bandwidth_v6) {
926 BandwidthTest(kIPv6AnyAddress);
927 }
928
TEST_F(VirtualSocketServerTest,delay_v4)929 TEST_F(VirtualSocketServerTest, delay_v4) {
930 DelayTest(kIPv4AnyAddress);
931 }
932
TEST_F(VirtualSocketServerTest,delay_v6)933 TEST_F(VirtualSocketServerTest, delay_v6) {
934 DelayTest(kIPv6AnyAddress);
935 }
936
937 // Works, receiving socket sees 127.0.0.2.
TEST_F(VirtualSocketServerTest,CanConnectFromMappedIPv6ToIPv4Any)938 TEST_F(VirtualSocketServerTest, CanConnectFromMappedIPv6ToIPv4Any) {
939 CrossFamilyConnectionTest(SocketAddress("::ffff:127.0.0.2", 0),
940 SocketAddress("0.0.0.0", 5000),
941 true);
942 }
943
944 // Fails.
TEST_F(VirtualSocketServerTest,CantConnectFromUnMappedIPv6ToIPv4Any)945 TEST_F(VirtualSocketServerTest, CantConnectFromUnMappedIPv6ToIPv4Any) {
946 CrossFamilyConnectionTest(SocketAddress("::2", 0),
947 SocketAddress("0.0.0.0", 5000),
948 false);
949 }
950
951 // Fails.
TEST_F(VirtualSocketServerTest,CantConnectFromUnMappedIPv6ToMappedIPv6)952 TEST_F(VirtualSocketServerTest, CantConnectFromUnMappedIPv6ToMappedIPv6) {
953 CrossFamilyConnectionTest(SocketAddress("::2", 0),
954 SocketAddress("::ffff:127.0.0.1", 5000),
955 false);
956 }
957
958 // Works. receiving socket sees ::ffff:127.0.0.2.
TEST_F(VirtualSocketServerTest,CanConnectFromIPv4ToIPv6Any)959 TEST_F(VirtualSocketServerTest, CanConnectFromIPv4ToIPv6Any) {
960 CrossFamilyConnectionTest(SocketAddress("127.0.0.2", 0),
961 SocketAddress("::", 5000),
962 true);
963 }
964
965 // Fails.
TEST_F(VirtualSocketServerTest,CantConnectFromIPv4ToUnMappedIPv6)966 TEST_F(VirtualSocketServerTest, CantConnectFromIPv4ToUnMappedIPv6) {
967 CrossFamilyConnectionTest(SocketAddress("127.0.0.2", 0),
968 SocketAddress("::1", 5000),
969 false);
970 }
971
972 // Works. Receiving socket sees ::ffff:127.0.0.1.
TEST_F(VirtualSocketServerTest,CanConnectFromIPv4ToMappedIPv6)973 TEST_F(VirtualSocketServerTest, CanConnectFromIPv4ToMappedIPv6) {
974 CrossFamilyConnectionTest(SocketAddress("127.0.0.1", 0),
975 SocketAddress("::ffff:127.0.0.2", 5000),
976 true);
977 }
978
979 // Works, receiving socket sees a result from GetNextIP.
TEST_F(VirtualSocketServerTest,CanConnectFromUnboundIPv6ToIPv4Any)980 TEST_F(VirtualSocketServerTest, CanConnectFromUnboundIPv6ToIPv4Any) {
981 CrossFamilyConnectionTest(SocketAddress("::", 0),
982 SocketAddress("0.0.0.0", 5000),
983 true);
984 }
985
986 // Works, receiving socket sees whatever GetNextIP gave the client.
TEST_F(VirtualSocketServerTest,CanConnectFromUnboundIPv4ToIPv6Any)987 TEST_F(VirtualSocketServerTest, CanConnectFromUnboundIPv4ToIPv6Any) {
988 CrossFamilyConnectionTest(SocketAddress("0.0.0.0", 0),
989 SocketAddress("::", 5000),
990 true);
991 }
992
TEST_F(VirtualSocketServerTest,CanSendDatagramFromUnboundIPv4ToIPv6Any)993 TEST_F(VirtualSocketServerTest, CanSendDatagramFromUnboundIPv4ToIPv6Any) {
994 CrossFamilyDatagramTest(SocketAddress("0.0.0.0", 0),
995 SocketAddress("::", 5000),
996 true);
997 }
998
TEST_F(VirtualSocketServerTest,CanSendDatagramFromMappedIPv6ToIPv4Any)999 TEST_F(VirtualSocketServerTest, CanSendDatagramFromMappedIPv6ToIPv4Any) {
1000 CrossFamilyDatagramTest(SocketAddress("::ffff:127.0.0.1", 0),
1001 SocketAddress("0.0.0.0", 5000),
1002 true);
1003 }
1004
TEST_F(VirtualSocketServerTest,CantSendDatagramFromUnMappedIPv6ToIPv4Any)1005 TEST_F(VirtualSocketServerTest, CantSendDatagramFromUnMappedIPv6ToIPv4Any) {
1006 CrossFamilyDatagramTest(SocketAddress("::2", 0),
1007 SocketAddress("0.0.0.0", 5000),
1008 false);
1009 }
1010
TEST_F(VirtualSocketServerTest,CantSendDatagramFromUnMappedIPv6ToMappedIPv6)1011 TEST_F(VirtualSocketServerTest, CantSendDatagramFromUnMappedIPv6ToMappedIPv6) {
1012 CrossFamilyDatagramTest(SocketAddress("::2", 0),
1013 SocketAddress("::ffff:127.0.0.1", 5000),
1014 false);
1015 }
1016
TEST_F(VirtualSocketServerTest,CanSendDatagramFromIPv4ToIPv6Any)1017 TEST_F(VirtualSocketServerTest, CanSendDatagramFromIPv4ToIPv6Any) {
1018 CrossFamilyDatagramTest(SocketAddress("127.0.0.2", 0),
1019 SocketAddress("::", 5000),
1020 true);
1021 }
1022
TEST_F(VirtualSocketServerTest,CantSendDatagramFromIPv4ToUnMappedIPv6)1023 TEST_F(VirtualSocketServerTest, CantSendDatagramFromIPv4ToUnMappedIPv6) {
1024 CrossFamilyDatagramTest(SocketAddress("127.0.0.2", 0),
1025 SocketAddress("::1", 5000),
1026 false);
1027 }
1028
TEST_F(VirtualSocketServerTest,CanSendDatagramFromIPv4ToMappedIPv6)1029 TEST_F(VirtualSocketServerTest, CanSendDatagramFromIPv4ToMappedIPv6) {
1030 CrossFamilyDatagramTest(SocketAddress("127.0.0.1", 0),
1031 SocketAddress("::ffff:127.0.0.2", 5000),
1032 true);
1033 }
1034
TEST_F(VirtualSocketServerTest,CanSendDatagramFromUnboundIPv6ToIPv4Any)1035 TEST_F(VirtualSocketServerTest, CanSendDatagramFromUnboundIPv6ToIPv4Any) {
1036 CrossFamilyDatagramTest(SocketAddress("::", 0),
1037 SocketAddress("0.0.0.0", 5000),
1038 true);
1039 }
1040
TEST_F(VirtualSocketServerTest,SetSendingBlockedWithUdpSocket)1041 TEST_F(VirtualSocketServerTest, SetSendingBlockedWithUdpSocket) {
1042 AsyncSocket* socket1 =
1043 ss_.CreateAsyncSocket(kIPv4AnyAddress.family(), SOCK_DGRAM);
1044 std::unique_ptr<AsyncSocket> socket2 =
1045 WrapUnique(ss_.CreateAsyncSocket(kIPv4AnyAddress.family(), SOCK_DGRAM));
1046 socket1->Bind(kIPv4AnyAddress);
1047 socket2->Bind(kIPv4AnyAddress);
1048 auto client1 =
1049 MakeUnique<TestClient>(MakeUnique<AsyncUDPSocket>(socket1), &fake_clock_);
1050
1051 ss_.SetSendingBlocked(true);
1052 EXPECT_EQ(-1, client1->SendTo("foo", 3, socket2->GetLocalAddress()));
1053 EXPECT_TRUE(socket1->IsBlocking());
1054 EXPECT_EQ(0, client1->ready_to_send_count());
1055
1056 ss_.SetSendingBlocked(false);
1057 EXPECT_EQ(1, client1->ready_to_send_count());
1058 EXPECT_EQ(3, client1->SendTo("foo", 3, socket2->GetLocalAddress()));
1059 }
1060
TEST_F(VirtualSocketServerTest,SetSendingBlockedWithTcpSocket)1061 TEST_F(VirtualSocketServerTest, SetSendingBlockedWithTcpSocket) {
1062 constexpr size_t kBufferSize = 1024;
1063 ss_.set_send_buffer_capacity(kBufferSize);
1064 ss_.set_recv_buffer_capacity(kBufferSize);
1065
1066 StreamSink sink;
1067 std::unique_ptr<AsyncSocket> socket1 =
1068 WrapUnique(ss_.CreateAsyncSocket(kIPv4AnyAddress.family(), SOCK_STREAM));
1069 std::unique_ptr<AsyncSocket> socket2 =
1070 WrapUnique(ss_.CreateAsyncSocket(kIPv4AnyAddress.family(), SOCK_STREAM));
1071 sink.Monitor(socket1.get());
1072 sink.Monitor(socket2.get());
1073 socket1->Bind(kIPv4AnyAddress);
1074 socket2->Bind(kIPv4AnyAddress);
1075
1076 // Connect sockets.
1077 EXPECT_EQ(0, socket1->Connect(socket2->GetLocalAddress()));
1078 EXPECT_EQ(0, socket2->Connect(socket1->GetLocalAddress()));
1079 ss_.ProcessMessagesUntilIdle();
1080
1081 char data[kBufferSize] = {};
1082
1083 // First Send call will fill the send buffer but not send anything.
1084 ss_.SetSendingBlocked(true);
1085 EXPECT_EQ(static_cast<int>(kBufferSize), socket1->Send(data, kBufferSize));
1086 ss_.ProcessMessagesUntilIdle();
1087 EXPECT_FALSE(sink.Check(socket1.get(), SSE_WRITE));
1088 EXPECT_FALSE(sink.Check(socket2.get(), SSE_READ));
1089 EXPECT_FALSE(socket1->IsBlocking());
1090
1091 // Since the send buffer is full, next Send will result in EWOULDBLOCK.
1092 EXPECT_EQ(-1, socket1->Send(data, kBufferSize));
1093 EXPECT_FALSE(sink.Check(socket1.get(), SSE_WRITE));
1094 EXPECT_FALSE(sink.Check(socket2.get(), SSE_READ));
1095 EXPECT_TRUE(socket1->IsBlocking());
1096
1097 // When sending is unblocked, the buffered data should be sent and
1098 // SignalWriteEvent should fire.
1099 ss_.SetSendingBlocked(false);
1100 ss_.ProcessMessagesUntilIdle();
1101 EXPECT_TRUE(sink.Check(socket1.get(), SSE_WRITE));
1102 EXPECT_TRUE(sink.Check(socket2.get(), SSE_READ));
1103 }
1104
TEST_F(VirtualSocketServerTest,CreatesStandardDistribution)1105 TEST_F(VirtualSocketServerTest, CreatesStandardDistribution) {
1106 const uint32_t kTestMean[] = {10, 100, 333, 1000};
1107 const double kTestDev[] = { 0.25, 0.1, 0.01 };
1108 // TODO(deadbeef): The current code only works for 1000 data points or more.
1109 const uint32_t kTestSamples[] = {/*10, 100,*/ 1000};
1110 for (size_t midx = 0; midx < arraysize(kTestMean); ++midx) {
1111 for (size_t didx = 0; didx < arraysize(kTestDev); ++didx) {
1112 for (size_t sidx = 0; sidx < arraysize(kTestSamples); ++sidx) {
1113 ASSERT_LT(0u, kTestSamples[sidx]);
1114 const uint32_t kStdDev =
1115 static_cast<uint32_t>(kTestDev[didx] * kTestMean[midx]);
1116 VirtualSocketServer::Function* f =
1117 VirtualSocketServer::CreateDistribution(kTestMean[midx],
1118 kStdDev,
1119 kTestSamples[sidx]);
1120 ASSERT_TRUE(nullptr != f);
1121 ASSERT_EQ(kTestSamples[sidx], f->size());
1122 double sum = 0;
1123 for (uint32_t i = 0; i < f->size(); ++i) {
1124 sum += (*f)[i].second;
1125 }
1126 const double mean = sum / f->size();
1127 double sum_sq_dev = 0;
1128 for (uint32_t i = 0; i < f->size(); ++i) {
1129 double dev = (*f)[i].second - mean;
1130 sum_sq_dev += dev * dev;
1131 }
1132 const double stddev = sqrt(sum_sq_dev / f->size());
1133 EXPECT_NEAR(kTestMean[midx], mean, 0.1 * kTestMean[midx])
1134 << "M=" << kTestMean[midx]
1135 << " SD=" << kStdDev
1136 << " N=" << kTestSamples[sidx];
1137 EXPECT_NEAR(kStdDev, stddev, 0.1 * kStdDev)
1138 << "M=" << kTestMean[midx]
1139 << " SD=" << kStdDev
1140 << " N=" << kTestSamples[sidx];
1141 delete f;
1142 }
1143 }
1144 }
1145 }
1146