net/socket/socks_client_socket_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/socket/socks_client_socket.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "net/base/address_list.h"
   9 #include "net/base/net_log.h"
  10 #include "net/base/net_log_unittest.h"
  11 #include "net/base/test_completion_callback.h"
  12 #include "net/base/winsock_init.h"
  13 #include "net/dns/host_resolver.h"
  14 #include "net/dns/mock_host_resolver.h"
  15 #include "net/socket/client_socket_factory.h"
  16 #include "net/socket/socket_test_util.h"
  17 #include "net/socket/tcp_client_socket.h"
  18 #include "testing/gtest/include/gtest/gtest.h"
  19 #include "testing/platform_test.h"
  20
  21 //-----------------------------------------------------------------------------
  22
  23 namespace net {
  24
  25 const char kSOCKSOkRequest[] = { 0x04, 0x01, 0x00, 0x50, 127, 0, 0, 1, 0 };
  26 const char kSOCKSOkReply[] = { 0x00, 0x5A, 0x00, 0x00, 0, 0, 0, 0 };
  27
  28 class SOCKSClientSocketTest : public PlatformTest {
  29  public:
  30   SOCKSClientSocketTest();
  31   // Create a SOCKSClientSocket on top of a MockSocket.
  32   scoped_ptr<SOCKSClientSocket> BuildMockSocket(
  33       MockRead reads[], size_t reads_count,
  34       MockWrite writes[], size_t writes_count,
  35       HostResolver* host_resolver,
  36       const std::string& hostname, int port,
  37       NetLog* net_log);
  38   void SetUp() override;
  39
  40  protected:
  41   scoped_ptr<SOCKSClientSocket> user_sock_;
  42   AddressList address_list_;
  43   // Filled in by BuildMockSocket() and owned by its return value
  44   // (which |user_sock| is set to).
  45   StreamSocket* tcp_sock_;
  46   TestCompletionCallback callback_;
  47   scoped_ptr<MockHostResolver> host_resolver_;
  48   scoped_ptr<SocketDataProvider> data_;
  49 };
  50
  51 SOCKSClientSocketTest::SOCKSClientSocketTest()
  52   : host_resolver_(new MockHostResolver) {
  53 }
  54
  55 // Set up platform before every test case
  56 void SOCKSClientSocketTest::SetUp() {
  57   PlatformTest::SetUp();
  58 }
  59
  60 scoped_ptr<SOCKSClientSocket> SOCKSClientSocketTest::BuildMockSocket(
  61     MockRead reads[],
  62     size_t reads_count,
  63     MockWrite writes[],
  64     size_t writes_count,
  65     HostResolver* host_resolver,
  66     const std::string& hostname,
  67     int port,
  68     NetLog* net_log) {
  69
  70   TestCompletionCallback callback;
  71   data_.reset(new StaticSocketDataProvider(reads, reads_count,
  72                                            writes, writes_count));
  73   tcp_sock_ = new MockTCPClientSocket(address_list_, net_log, data_.get());
  74
  75   int rv = tcp_sock_->Connect(callback.callback());
  76   EXPECT_EQ(ERR_IO_PENDING, rv);
  77   rv = callback.WaitForResult();
  78   EXPECT_EQ(OK, rv);
  79   EXPECT_TRUE(tcp_sock_->IsConnected());
  80
  81   scoped_ptr<ClientSocketHandle> connection(new ClientSocketHandle);
  82   // |connection| takes ownership of |tcp_sock_|, but keep a
  83   // non-owning pointer to it.
  84   connection->SetSocket(scoped_ptr<StreamSocket>(tcp_sock_));
  85   return scoped_ptr<SOCKSClientSocket>(new SOCKSClientSocket(
  86       connection.Pass(),
  87       HostResolver::RequestInfo(HostPortPair(hostname, port)),
  88       DEFAULT_PRIORITY,
  89       host_resolver));
  90 }
  91
  92 // Implementation of HostResolver that never completes its resolve request.
  93 // We use this in the test "DisconnectWhileHostResolveInProgress" to make
  94 // sure that the outstanding resolve request gets cancelled.
  95 class HangingHostResolverWithCancel : public HostResolver {
  96  public:
  97   HangingHostResolverWithCancel() : outstanding_request_(NULL) {}
  98
  99   int Resolve(const RequestInfo& info,
 100               RequestPriority priority,
 101               AddressList* addresses,
 102               const CompletionCallback& callback,
 103               RequestHandle* out_req,
 104               const BoundNetLog& net_log) override {
 105     DCHECK(addresses);
 106     DCHECK_EQ(false, callback.is_null());
 107     EXPECT_FALSE(HasOutstandingRequest());
 108     outstanding_request_ = reinterpret_cast<RequestHandle>(1);
 109     *out_req = outstanding_request_;
 110     return ERR_IO_PENDING;
 111   }
 112
 113   int ResolveFromCache(const RequestInfo& info,
 114                        AddressList* addresses,
 115                        const BoundNetLog& net_log) override {
 116     NOTIMPLEMENTED();
 117     return ERR_UNEXPECTED;
 118   }
 119
 120   void CancelRequest(RequestHandle req) override {
 121     EXPECT_TRUE(HasOutstandingRequest());
 122     EXPECT_EQ(outstanding_request_, req);
 123     outstanding_request_ = NULL;
 124   }
 125
 126   bool HasOutstandingRequest() {
 127     return outstanding_request_ != NULL;
 128   }
 129
 130  private:
 131   RequestHandle outstanding_request_;
 132
 133   DISALLOW_COPY_AND_ASSIGN(HangingHostResolverWithCancel);
 134 };
 135
 136 // Tests a complete handshake and the disconnection.
 137 TEST_F(SOCKSClientSocketTest, CompleteHandshake) {
 138   const std::string payload_write = "random data";
 139   const std::string payload_read = "moar random data";
 140
 141   MockWrite data_writes[] = {
 142       MockWrite(ASYNC, kSOCKSOkRequest, arraysize(kSOCKSOkRequest)),
 143       MockWrite(ASYNC, payload_write.data(), payload_write.size()) };
 144   MockRead data_reads[] = {
 145       MockRead(ASYNC, kSOCKSOkReply, arraysize(kSOCKSOkReply)),
 146       MockRead(ASYNC, payload_read.data(), payload_read.size()) };
 147   CapturingNetLog log;
 148
 149   user_sock_ = BuildMockSocket(data_reads, arraysize(data_reads),
 150                                data_writes, arraysize(data_writes),
 151                                host_resolver_.get(),
 152                                "localhost", 80,
 153                                &log);
 154
 155   // At this state the TCP connection is completed but not the SOCKS handshake.
 156   EXPECT_TRUE(tcp_sock_->IsConnected());
 157   EXPECT_FALSE(user_sock_->IsConnected());
 158
 159   int rv = user_sock_->Connect(callback_.callback());
 160   EXPECT_EQ(ERR_IO_PENDING, rv);
 161
 162   CapturingNetLog::CapturedEntryList entries;
 163   log.GetEntries(&entries);
 164   EXPECT_TRUE(
 165       LogContainsBeginEvent(entries, 0, NetLog::TYPE_SOCKS_CONNECT));
 166   EXPECT_FALSE(user_sock_->IsConnected());
 167
 168   rv = callback_.WaitForResult();
 169   EXPECT_EQ(OK, rv);
 170   EXPECT_TRUE(user_sock_->IsConnected());
 171   log.GetEntries(&entries);
 172   EXPECT_TRUE(LogContainsEndEvent(
 173       entries, -1, NetLog::TYPE_SOCKS_CONNECT));
 174
 175   scoped_refptr<IOBuffer> buffer(new IOBuffer(payload_write.size()));
 176   memcpy(buffer->data(), payload_write.data(), payload_write.size());
 177   rv = user_sock_->Write(
 178       buffer.get(), payload_write.size(), callback_.callback());
 179   EXPECT_EQ(ERR_IO_PENDING, rv);
 180   rv = callback_.WaitForResult();
 181   EXPECT_EQ(static_cast<int>(payload_write.size()), rv);
 182
 183   buffer = new IOBuffer(payload_read.size());
 184   rv =
 185       user_sock_->Read(buffer.get(), payload_read.size(), callback_.callback());
 186   EXPECT_EQ(ERR_IO_PENDING, rv);
 187   rv = callback_.WaitForResult();
 188   EXPECT_EQ(static_cast<int>(payload_read.size()), rv);
 189   EXPECT_EQ(payload_read, std::string(buffer->data(), payload_read.size()));
 190
 191   user_sock_->Disconnect();
 192   EXPECT_FALSE(tcp_sock_->IsConnected());
 193   EXPECT_FALSE(user_sock_->IsConnected());
 194 }
 195
 196 // List of responses from the socks server and the errors they should
 197 // throw up are tested here.
 198 TEST_F(SOCKSClientSocketTest, HandshakeFailures) {
 199   const struct {
 200     const char fail_reply[8];
 201     Error fail_code;
 202   } tests[] = {
 203     // Failure of the server response code
 204     {
 205       { 0x01, 0x5A, 0x00, 0x00, 0, 0, 0, 0 },
 206       ERR_SOCKS_CONNECTION_FAILED,
 207     },
 208     // Failure of the null byte
 209     {
 210       { 0x00, 0x5B, 0x00, 0x00, 0, 0, 0, 0 },
 211       ERR_SOCKS_CONNECTION_FAILED,
 212     },
 213   };
 214
 215   //---------------------------------------
 216
 217   for (size_t i = 0; i < arraysize(tests); ++i) {
 218     MockWrite data_writes[] = {
 219         MockWrite(SYNCHRONOUS, kSOCKSOkRequest, arraysize(kSOCKSOkRequest)) };
 220     MockRead data_reads[] = {
 221         MockRead(SYNCHRONOUS, tests[i].fail_reply,
 222                  arraysize(tests[i].fail_reply)) };
 223     CapturingNetLog log;
 224
 225     user_sock_ = BuildMockSocket(data_reads, arraysize(data_reads),
 226                                  data_writes, arraysize(data_writes),
 227                                  host_resolver_.get(),
 228                                  "localhost", 80,
 229                                  &log);
 230
 231     int rv = user_sock_->Connect(callback_.callback());
 232     EXPECT_EQ(ERR_IO_PENDING, rv);
 233
 234     CapturingNetLog::CapturedEntryList entries;
 235     log.GetEntries(&entries);
 236     EXPECT_TRUE(LogContainsBeginEvent(
 237         entries, 0, NetLog::TYPE_SOCKS_CONNECT));
 238
 239     rv = callback_.WaitForResult();
 240     EXPECT_EQ(tests[i].fail_code, rv);
 241     EXPECT_FALSE(user_sock_->IsConnected());
 242     EXPECT_TRUE(tcp_sock_->IsConnected());
 243     log.GetEntries(&entries);
 244     EXPECT_TRUE(LogContainsEndEvent(
 245         entries, -1, NetLog::TYPE_SOCKS_CONNECT));
 246   }
 247 }
 248
 249 // Tests scenario when the server sends the handshake response in
 250 // more than one packet.
 251 TEST_F(SOCKSClientSocketTest, PartialServerReads) {
 252   const char kSOCKSPartialReply1[] = { 0x00 };
 253   const char kSOCKSPartialReply2[] = { 0x5A, 0x00, 0x00, 0, 0, 0, 0 };
 254
 255   MockWrite data_writes[] = {
 256       MockWrite(ASYNC, kSOCKSOkRequest, arraysize(kSOCKSOkRequest)) };
 257   MockRead data_reads[] = {
 258       MockRead(ASYNC, kSOCKSPartialReply1, arraysize(kSOCKSPartialReply1)),
 259       MockRead(ASYNC, kSOCKSPartialReply2, arraysize(kSOCKSPartialReply2)) };
 260   CapturingNetLog log;
 261
 262   user_sock_ = BuildMockSocket(data_reads, arraysize(data_reads),
 263                                data_writes, arraysize(data_writes),
 264                                host_resolver_.get(),
 265                                "localhost", 80,
 266                                &log);
 267
 268   int rv = user_sock_->Connect(callback_.callback());
 269   EXPECT_EQ(ERR_IO_PENDING, rv);
 270   CapturingNetLog::CapturedEntryList entries;
 271   log.GetEntries(&entries);
 272   EXPECT_TRUE(LogContainsBeginEvent(
 273       entries, 0, NetLog::TYPE_SOCKS_CONNECT));
 274
 275   rv = callback_.WaitForResult();
 276   EXPECT_EQ(OK, rv);
 277   EXPECT_TRUE(user_sock_->IsConnected());
 278   log.GetEntries(&entries);
 279   EXPECT_TRUE(LogContainsEndEvent(
 280       entries, -1, NetLog::TYPE_SOCKS_CONNECT));
 281 }
 282
 283 // Tests scenario when the client sends the handshake request in
 284 // more than one packet.
 285 TEST_F(SOCKSClientSocketTest, PartialClientWrites) {
 286   const char kSOCKSPartialRequest1[] = { 0x04, 0x01 };
 287   const char kSOCKSPartialRequest2[] = { 0x00, 0x50, 127, 0, 0, 1, 0 };
 288
 289   MockWrite data_writes[] = {
 290       MockWrite(ASYNC, kSOCKSPartialRequest1, arraysize(kSOCKSPartialRequest1)),
 291       // simulate some empty writes
 292       MockWrite(ASYNC, 0),
 293       MockWrite(ASYNC, 0),
 294       MockWrite(ASYNC, kSOCKSPartialRequest2, arraysize(kSOCKSPartialRequest2)),
 295   };
 296   MockRead data_reads[] = {
 297       MockRead(ASYNC, kSOCKSOkReply, arraysize(kSOCKSOkReply)) };
 298   CapturingNetLog log;
 299
 300   user_sock_ = BuildMockSocket(data_reads, arraysize(data_reads),
 301                                data_writes, arraysize(data_writes),
 302                                host_resolver_.get(),
 303                                "localhost", 80,
 304                                &log);
 305
 306   int rv = user_sock_->Connect(callback_.callback());
 307   EXPECT_EQ(ERR_IO_PENDING, rv);
 308   CapturingNetLog::CapturedEntryList entries;
 309   log.GetEntries(&entries);
 310   EXPECT_TRUE(LogContainsBeginEvent(
 311       entries, 0, NetLog::TYPE_SOCKS_CONNECT));
 312
 313   rv = callback_.WaitForResult();
 314   EXPECT_EQ(OK, rv);
 315   EXPECT_TRUE(user_sock_->IsConnected());
 316   log.GetEntries(&entries);
 317   EXPECT_TRUE(LogContainsEndEvent(
 318       entries, -1, NetLog::TYPE_SOCKS_CONNECT));
 319 }
 320
 321 // Tests the case when the server sends a smaller sized handshake data
 322 // and closes the connection.
 323 TEST_F(SOCKSClientSocketTest, FailedSocketRead) {
 324   MockWrite data_writes[] = {
 325       MockWrite(ASYNC, kSOCKSOkRequest, arraysize(kSOCKSOkRequest)) };
 326   MockRead data_reads[] = {
 327       MockRead(ASYNC, kSOCKSOkReply, arraysize(kSOCKSOkReply) - 2),
 328       // close connection unexpectedly
 329       MockRead(SYNCHRONOUS, 0) };
 330   CapturingNetLog log;
 331
 332   user_sock_ = BuildMockSocket(data_reads, arraysize(data_reads),
 333                                data_writes, arraysize(data_writes),
 334                                host_resolver_.get(),
 335                                "localhost", 80,
 336                                &log);
 337
 338   int rv = user_sock_->Connect(callback_.callback());
 339   EXPECT_EQ(ERR_IO_PENDING, rv);
 340   CapturingNetLog::CapturedEntryList entries;
 341   log.GetEntries(&entries);
 342   EXPECT_TRUE(LogContainsBeginEvent(
 343       entries, 0, NetLog::TYPE_SOCKS_CONNECT));
 344
 345   rv = callback_.WaitForResult();
 346   EXPECT_EQ(ERR_CONNECTION_CLOSED, rv);
 347   EXPECT_FALSE(user_sock_->IsConnected());
 348   log.GetEntries(&entries);
 349   EXPECT_TRUE(LogContainsEndEvent(
 350       entries, -1, NetLog::TYPE_SOCKS_CONNECT));
 351 }
 352
 353 // Tries to connect to an unknown hostname. Should fail rather than
 354 // falling back to SOCKS4a.
 355 TEST_F(SOCKSClientSocketTest, FailedDNS) {
 356   const char hostname[] = "unresolved.ipv4.address";
 357
 358   host_resolver_->rules()->AddSimulatedFailure(hostname);
 359
 360   CapturingNetLog log;
 361
 362   user_sock_ = BuildMockSocket(NULL, 0,
 363                                NULL, 0,
 364                                host_resolver_.get(),
 365                                hostname, 80,
 366                                &log);
 367
 368   int rv = user_sock_->Connect(callback_.callback());
 369   EXPECT_EQ(ERR_IO_PENDING, rv);
 370   CapturingNetLog::CapturedEntryList entries;
 371   log.GetEntries(&entries);
 372   EXPECT_TRUE(LogContainsBeginEvent(
 373       entries, 0, NetLog::TYPE_SOCKS_CONNECT));
 374
 375   rv = callback_.WaitForResult();
 376   EXPECT_EQ(ERR_NAME_NOT_RESOLVED, rv);
 377   EXPECT_FALSE(user_sock_->IsConnected());
 378   log.GetEntries(&entries);
 379   EXPECT_TRUE(LogContainsEndEvent(
 380       entries, -1, NetLog::TYPE_SOCKS_CONNECT));
 381 }
 382
 383 // Calls Disconnect() while a host resolve is in progress. The outstanding host
 384 // resolve should be cancelled.
 385 TEST_F(SOCKSClientSocketTest, DisconnectWhileHostResolveInProgress) {
 386   scoped_ptr<HangingHostResolverWithCancel> hanging_resolver(
 387     new HangingHostResolverWithCancel());
 388
 389   // Doesn't matter what the socket data is, we will never use it -- garbage.
 390   MockWrite data_writes[] = { MockWrite(SYNCHRONOUS, "", 0) };
 391   MockRead data_reads[] = { MockRead(SYNCHRONOUS, "", 0) };
 392
 393   user_sock_ = BuildMockSocket(data_reads, arraysize(data_reads),
 394                                data_writes, arraysize(data_writes),
 395                                hanging_resolver.get(),
 396                                "foo", 80,
 397                                NULL);
 398
 399   // Start connecting (will get stuck waiting for the host to resolve).
 400   int rv = user_sock_->Connect(callback_.callback());
 401   EXPECT_EQ(ERR_IO_PENDING, rv);
 402
 403   EXPECT_FALSE(user_sock_->IsConnected());
 404   EXPECT_FALSE(user_sock_->IsConnectedAndIdle());
 405
 406   // The host resolver should have received the resolve request.
 407   EXPECT_TRUE(hanging_resolver->HasOutstandingRequest());
 408
 409   // Disconnect the SOCKS socket -- this should cancel the outstanding resolve.
 410   user_sock_->Disconnect();
 411
 412   EXPECT_FALSE(hanging_resolver->HasOutstandingRequest());
 413
 414   EXPECT_FALSE(user_sock_->IsConnected());
 415   EXPECT_FALSE(user_sock_->IsConnectedAndIdle());
 416 }
 417
 418 // Tries to connect to an IPv6 IP.  Should fail, as SOCKS4 does not support
 419 // IPv6.
 420 TEST_F(SOCKSClientSocketTest, NoIPv6) {
 421   const char kHostName[] = "::1";
 422
 423   user_sock_ = BuildMockSocket(NULL, 0,
 424                                NULL, 0,
 425                                host_resolver_.get(),
 426                                kHostName, 80,
 427                                NULL);
 428
 429   EXPECT_EQ(ERR_NAME_NOT_RESOLVED,
 430             callback_.GetResult(user_sock_->Connect(callback_.callback())));
 431 }
 432
 433 // Same as above, but with a real resolver, to protect against regressions.
 434 TEST_F(SOCKSClientSocketTest, NoIPv6RealResolver) {
 435   const char kHostName[] = "::1";
 436
 437   scoped_ptr<HostResolver> host_resolver(
 438       HostResolver::CreateSystemResolver(HostResolver::Options(), NULL));
 439
 440   user_sock_ = BuildMockSocket(NULL, 0,
 441                                NULL, 0,
 442                                host_resolver.get(),
 443                                kHostName, 80,
 444                                NULL);
 445
 446   EXPECT_EQ(ERR_NAME_NOT_RESOLVED,
 447             callback_.GetResult(user_sock_->Connect(callback_.callback())));
 448 }
 449
 450 }  // namespace net