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comparison: media/mtransport/test/buffered_stun_socket_unittest.cpp

media/mtransport/test/buffered_stun_socket_unittest.cpp

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TOR_BUG_9701
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1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
5 * You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 // Original author: ekr@rtfm.com
8
9 #include <iostream>
10
11 #include "nspr.h"
12 #include "nss.h"
13 #include "ssl.h"
14
15 #include "mozilla/Scoped.h"
16
17 extern "C" {
18 #include "nr_api.h"
19 #include "nr_socket.h"
20 #include "nr_socket_buffered_stun.h"
21 #include "transport_addr.h"
22 #include "stun.h"
23 }
24
25 #include "databuffer.h"
26 #include "mtransport_test_utils.h"
27
28 #include "nr_socket_prsock.h"
29
30 #define GTEST_HAS_RTTI 0
31 #include "gtest/gtest.h"
32 #include "gtest_utils.h"
33
34 using namespace mozilla;
35 MtransportTestUtils *test_utils;
36
37 static uint8_t kStunMessage[] = {
38 0x00, 0x01, 0x00, 0x08, 0x21, 0x12, 0xa4, 0x42,
39 0x9b, 0x90, 0xbe, 0x2c, 0xae, 0x1a, 0x0c, 0xa8,
40 0xa0, 0xd6, 0x8b, 0x08, 0x80, 0x28, 0x00, 0x04,
41 0xdb, 0x35, 0x5f, 0xaa
42 };
43 static size_t kStunMessageLen = sizeof(kStunMessage);
44
45 class DummySocket : public NrSocketBase {
46 public:
47 DummySocket()
48 : writable_(UINT_MAX),
49 write_buffer_(nullptr),
50 readable_(UINT_MAX),
51 read_buffer_(nullptr),
52 cb_(nullptr),
53 cb_arg_(nullptr),
54 self_(nullptr) {}
55
56 // the nr_socket APIs
57 virtual int create(nr_transport_addr *addr) {
58 return 0;
59 }
60
61 virtual int sendto(const void *msg, size_t len,
62 int flags, nr_transport_addr *to) {
63 MOZ_CRASH();
64 return 0;
65 }
66
67 virtual int recvfrom(void * buf, size_t maxlen,
68 size_t *len, int flags,
69 nr_transport_addr *from) {
70 MOZ_CRASH();
71 return 0;
72 }
73
74 virtual int getaddr(nr_transport_addr *addrp) {
75 MOZ_CRASH();
76 return 0;
77 }
78
79 virtual void close() {
80 }
81
82 virtual int connect(nr_transport_addr *addr) {
83 return 0;
84 }
85
86 virtual int write(const void *msg, size_t len, size_t *written) {
87 // Shouldn't be anything here.
88 EXPECT_EQ(nullptr, write_buffer_.get());
89
90 size_t to_write = std::min(len, writable_);
91
92 if (to_write) {
93 write_buffer_ = new DataBuffer(
94 static_cast<const uint8_t *>(msg), to_write);
95 *written = to_write;
96 }
97
98 return 0;
99 }
100
101 virtual int read(void* buf, size_t maxlen, size_t *len) {
102 if (!read_buffer_.get()) {
103 return R_WOULDBLOCK;
104 }
105
106 size_t to_read = std::min(read_buffer_->len(),
107 std::min(maxlen, readable_));
108
109 memcpy(buf, read_buffer_->data(), to_read);
110 *len = to_read;
111
112 if (to_read < read_buffer_->len()) {
113 read_buffer_ = new DataBuffer(read_buffer_->data() + to_read,
114 read_buffer_->len() - to_read);
115 } else {
116 read_buffer_ = nullptr;
117 }
118
119 return 0;
120 }
121
122 // Implementations of the async_event APIs.
123 // These are no-ops because we handle scheduling manually
124 // for test purposes.
125 virtual int async_wait(int how, NR_async_cb cb, void *cb_arg,
126 char *function, int line) {
127 EXPECT_EQ(nullptr, cb_);
128 cb_ = cb;
129 cb_arg_ = cb_arg;
130
131 return 0;
132 }
133
134 virtual int cancel(int how) {
135 cb_ = nullptr;
136 cb_arg_ = nullptr;
137
138 return 0;
139 }
140
141
142 // Read/Manipulate the current state.
143 void CheckWriteBuffer(uint8_t *data, size_t len) {
144 if (!len) {
145 EXPECT_EQ(nullptr, write_buffer_.get());
146 } else {
147 EXPECT_NE(nullptr, write_buffer_.get());
148 ASSERT_EQ(len, write_buffer_->len());
149 ASSERT_EQ(0, memcmp(data, write_buffer_->data(), len));
150 }
151 }
152
153 void ClearWriteBuffer() {
154 write_buffer_ = nullptr;
155 }
156
157 void SetWritable(size_t val) {
158 writable_ = val;
159 }
160
161 void FireWritableCb() {
162 NR_async_cb cb = cb_;
163 void *cb_arg = cb_arg_;
164
165 cb_ = nullptr;
166 cb_arg_ = nullptr;
167
168 cb(this, NR_ASYNC_WAIT_WRITE, cb_arg);
169 }
170
171 void SetReadBuffer(uint8_t *data, size_t len) {
172 EXPECT_EQ(nullptr, write_buffer_.get());
173 read_buffer_ = new DataBuffer(data, len);
174 }
175
176 void ClearReadBuffer() {
177 read_buffer_ = nullptr;
178 }
179
180 void SetReadable(size_t val) {
181 readable_ = val;
182 }
183
184 nr_socket *get_nr_socket() {
185 if (!self_) {
186 int r = nr_socket_create_int(this, vtbl(), &self_);
187 AddRef();
188 if (r)
189 return nullptr;
190 }
191
192 return self_;
193 }
194
195 NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DummySocket);
196
197 private:
198 DISALLOW_COPY_ASSIGN(DummySocket);
199
200 size_t writable_; // Amount we allow someone to write.
201 ScopedDeletePtr<DataBuffer> write_buffer_;
202 size_t readable_; // Amount we allow someone to read.
203 ScopedDeletePtr<DataBuffer> read_buffer_;
204
205 NR_async_cb cb_;
206 void *cb_arg_;
207 nr_socket *self_;
208 };
209
210 class BufferedStunSocketTest : public ::testing::Test {
211 public:
212 BufferedStunSocketTest()
213 : dummy_(nullptr),
214 test_socket_(nullptr) {}
215
216 ~BufferedStunSocketTest() {
217 nr_socket_destroy(&test_socket_);
218 }
219
220 void SetUp() {
221 ScopedDeletePtr<DummySocket> dummy(new DummySocket());
222
223 int r = nr_socket_buffered_stun_create(
224 dummy->get_nr_socket(),
225 kStunMessageLen,
226 &test_socket_);
227 ASSERT_EQ(0, r);
228 dummy_ = dummy.forget(); // Now owned by test_socket_.
229
230 r = nr_ip4_str_port_to_transport_addr(
231 (char *)"192.0.2.133", 3333, IPPROTO_TCP, &remote_addr_);
232 ASSERT_EQ(0, r);
233
234 r = nr_socket_connect(test_socket_,
235 &remote_addr_);
236 ASSERT_EQ(0, r);
237 }
238
239 nr_socket *socket() { return test_socket_; }
240
241 protected:
242 DummySocket *dummy_;
243 nr_socket *test_socket_;
244 nr_transport_addr remote_addr_;
245 };
246
247
248 TEST_F(BufferedStunSocketTest, TestCreate) {
249 }
250
251 TEST_F(BufferedStunSocketTest, TestSendTo) {
252 int r = nr_socket_sendto(test_socket_,
253 kStunMessage,
254 kStunMessageLen,
255 0, &remote_addr_);
256 ASSERT_EQ(0, r);
257
258 dummy_->CheckWriteBuffer(kStunMessage, kStunMessageLen);
259 }
260
261 TEST_F(BufferedStunSocketTest, TestSendToBuffered) {
262 dummy_->SetWritable(0);
263
264 int r = nr_socket_sendto(test_socket_,
265 kStunMessage,
266 kStunMessageLen,
267 0, &remote_addr_);
268 ASSERT_EQ(0, r);
269
270 dummy_->CheckWriteBuffer(nullptr, 0);
271
272 dummy_->SetWritable(kStunMessageLen);
273 dummy_->FireWritableCb();
274 dummy_->CheckWriteBuffer(kStunMessage, kStunMessageLen);
275 }
276
277 TEST_F(BufferedStunSocketTest, TestSendFullThenDrain) {
278 dummy_->SetWritable(0);
279
280 for (;;) {
281 int r = nr_socket_sendto(test_socket_,
282 kStunMessage,
283 kStunMessageLen,
284 0, &remote_addr_);
285 if (r == R_WOULDBLOCK)
286 break;
287
288 ASSERT_EQ(0, r);
289 }
290
291 // Nothing was written.
292 dummy_->CheckWriteBuffer(nullptr, 0);
293
294 // Now flush.
295 dummy_->SetWritable(kStunMessageLen);
296 dummy_->FireWritableCb();
297 dummy_->ClearWriteBuffer();
298
299 // Verify we can write something.
300 int r = nr_socket_sendto(test_socket_,
301 kStunMessage,
302 kStunMessageLen,
303 0, &remote_addr_);
304 ASSERT_EQ(0, r);
305
306 // And that it appears.
307 dummy_->CheckWriteBuffer(kStunMessage, kStunMessageLen);
308 }
309
310 TEST_F(BufferedStunSocketTest, TestSendToPartialBuffered) {
311 dummy_->SetWritable(10);
312
313 int r = nr_socket_sendto(test_socket_,
314 kStunMessage,
315 kStunMessageLen,
316 0, &remote_addr_);
317 ASSERT_EQ(0, r);
318
319 dummy_->CheckWriteBuffer(kStunMessage, 10);
320 dummy_->ClearWriteBuffer();
321
322 dummy_->SetWritable(kStunMessageLen);
323 dummy_->FireWritableCb();
324 dummy_->CheckWriteBuffer(kStunMessage + 10, kStunMessageLen - 10);
325 }
326
327 TEST_F(BufferedStunSocketTest, TestSendToReject) {
328 dummy_->SetWritable(0);
329
330 int r = nr_socket_sendto(test_socket_,
331 kStunMessage,
332 kStunMessageLen,
333 0, &remote_addr_);
334 ASSERT_EQ(0, r);
335
336 dummy_->CheckWriteBuffer(nullptr, 0);
337
338 r = nr_socket_sendto(test_socket_,
339 kStunMessage,
340 kStunMessageLen,
341 0, &remote_addr_);
342 ASSERT_EQ(R_WOULDBLOCK, r);
343
344 dummy_->CheckWriteBuffer(nullptr, 0);
345 }
346
347 TEST_F(BufferedStunSocketTest, TestSendToWrongAddr) {
348 nr_transport_addr addr;
349
350 int r = nr_ip4_str_port_to_transport_addr(
351 (char *)"192.0.2.134", 3333, IPPROTO_TCP, &addr);
352 ASSERT_EQ(0, r);
353
354 r = nr_socket_sendto(test_socket_,
355 kStunMessage,
356 kStunMessageLen,
357 0, &addr);
358 ASSERT_EQ(R_BAD_DATA, r);
359 }
360
361 TEST_F(BufferedStunSocketTest, TestReceiveRecvFrom) {
362 dummy_->SetReadBuffer(kStunMessage, kStunMessageLen);
363
364 unsigned char tmp[2048];
365 size_t len;
366 nr_transport_addr addr;
367
368 int r = nr_socket_recvfrom(test_socket_,
369 tmp, sizeof(tmp), &len, 0,
370 &addr);
371 ASSERT_EQ(0, r);
372 ASSERT_EQ(kStunMessageLen, len);
373 ASSERT_EQ(0, memcmp(kStunMessage, tmp, kStunMessageLen));
374 ASSERT_EQ(0, nr_transport_addr_cmp(&addr, &remote_addr_,
375 NR_TRANSPORT_ADDR_CMP_MODE_ALL));
376 }
377
378 TEST_F(BufferedStunSocketTest, TestReceiveRecvFromPartial) {
379 dummy_->SetReadBuffer(kStunMessage, 15);
380
381 unsigned char tmp[2048];
382 size_t len;
383 nr_transport_addr addr;
384
385 int r = nr_socket_recvfrom(test_socket_,
386 tmp, sizeof(tmp), &len, 0,
387 &addr);
388 ASSERT_EQ(R_WOULDBLOCK, r);
389
390
391 dummy_->SetReadBuffer(kStunMessage + 15, kStunMessageLen - 15);
392
393 r = nr_socket_recvfrom(test_socket_,
394 tmp, sizeof(tmp), &len, 0,
395 &addr);
396 ASSERT_EQ(0, r);
397 ASSERT_EQ(kStunMessageLen, len);
398 ASSERT_EQ(0, memcmp(kStunMessage, tmp, kStunMessageLen));
399 ASSERT_EQ(0, nr_transport_addr_cmp(&addr, &remote_addr_,
400 NR_TRANSPORT_ADDR_CMP_MODE_ALL));
401
402 r = nr_socket_recvfrom(test_socket_,
403 tmp, sizeof(tmp), &len, 0,
404 &addr);
405 ASSERT_EQ(R_WOULDBLOCK, r);
406 }
407
408
409 TEST_F(BufferedStunSocketTest, TestReceiveRecvFromGarbage) {
410 uint8_t garbage[50];
411 memset(garbage, 0xff, sizeof(garbage));
412
413 dummy_->SetReadBuffer(garbage, sizeof(garbage));
414
415 unsigned char tmp[2048];
416 size_t len;
417 nr_transport_addr addr;
418 int r = nr_socket_recvfrom(test_socket_,
419 tmp, sizeof(tmp), &len, 0,
420 &addr);
421 ASSERT_EQ(R_BAD_DATA, r);
422
423 r = nr_socket_recvfrom(test_socket_,
424 tmp, sizeof(tmp), &len, 0,
425 &addr);
426 ASSERT_EQ(R_FAILED, r);
427 }
428
429 TEST_F(BufferedStunSocketTest, TestReceiveRecvFromTooShort) {
430 dummy_->SetReadBuffer(kStunMessage, kStunMessageLen);
431
432 unsigned char tmp[2048];
433 size_t len;
434 nr_transport_addr addr;
435
436 int r = nr_socket_recvfrom(test_socket_,
437 tmp, kStunMessageLen - 1, &len, 0,
438 &addr);
439 ASSERT_EQ(R_BAD_ARGS, r);
440 }
441
442 TEST_F(BufferedStunSocketTest, TestReceiveRecvFromReallyLong) {
443 uint8_t garbage[4096];
444 memset(garbage, 0xff, sizeof(garbage));
445 memcpy(garbage, kStunMessage, kStunMessageLen);
446 nr_stun_message_header *hdr = reinterpret_cast<nr_stun_message_header *>
447 (garbage);
448 hdr->length = htons(3000);
449
450 dummy_->SetReadBuffer(garbage, sizeof(garbage));
451
452 unsigned char tmp[4096];
453 size_t len;
454 nr_transport_addr addr;
455
456 int r = nr_socket_recvfrom(test_socket_,
457 tmp, kStunMessageLen - 1, &len, 0,
458 &addr);
459 ASSERT_EQ(R_BAD_DATA, r);
460 }
461
462
463
464 int main(int argc, char **argv)
465 {
466 test_utils = new MtransportTestUtils();
467 NSS_NoDB_Init(nullptr);
468 NSS_SetDomesticPolicy();
469
470 // Start the tests
471 ::testing::InitGoogleTest(&argc, argv);
472
473 int rv = RUN_ALL_TESTS();
474
475 delete test_utils;
476 return rv;
477 }

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