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| 1 /* | |
| 2 * Copyright 2004 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 #if defined(_MSC_VER) && _MSC_VER < 1300 | |
| 12 #pragma warning(disable:4786) | |
| 13 #endif | |
| 14 | |
| 15 #include <time.h> | |
| 16 #include <errno.h> | |
| 17 | |
| 18 #if defined(WEBRTC_WIN) | |
| 19 #define WIN32_LEAN_AND_MEAN | |
| 20 #include <windows.h> | |
| 21 #include <winsock2.h> | |
| 22 #include <ws2tcpip.h> | |
| 23 #define SECURITY_WIN32 | |
| 24 #include <security.h> | |
| 25 #endif | |
| 26 | |
| 27 #include <algorithm> | |
| 28 | |
| 29 #include "webrtc/base/bytebuffer.h" | |
| 30 #include "webrtc/base/checks.h" | |
| 31 #include "webrtc/base/httpcommon.h" | |
| 32 #include "webrtc/base/logging.h" | |
| 33 #include "webrtc/base/socketadapters.h" | |
| 34 #include "webrtc/base/stringencode.h" | |
| 35 #include "webrtc/base/stringutils.h" | |
| 36 | |
| 37 namespace rtc { | |
| 38 | |
| 39 BufferedReadAdapter::BufferedReadAdapter(AsyncSocket* socket, size_t size) | |
| 40 : AsyncSocketAdapter(socket), buffer_size_(size), | |
| 41 data_len_(0), buffering_(false) { | |
| 42 buffer_ = new char[buffer_size_]; | |
| 43 } | |
| 44 | |
| 45 BufferedReadAdapter::~BufferedReadAdapter() { | |
| 46 delete [] buffer_; | |
| 47 } | |
| 48 | |
| 49 int BufferedReadAdapter::Send(const void *pv, size_t cb) { | |
| 50 if (buffering_) { | |
| 51 // TODO: Spoof error better; Signal Writeable | |
| 52 socket_->SetError(EWOULDBLOCK); | |
| 53 return -1; | |
| 54 } | |
| 55 return AsyncSocketAdapter::Send(pv, cb); | |
| 56 } | |
| 57 | |
| 58 int BufferedReadAdapter::Recv(void* pv, size_t cb, int64_t* timestamp) { | |
| 59 if (buffering_) { | |
| 60 socket_->SetError(EWOULDBLOCK); | |
| 61 return -1; | |
| 62 } | |
| 63 | |
| 64 size_t read = 0; | |
| 65 | |
| 66 if (data_len_) { | |
| 67 read = std::min(cb, data_len_); | |
| 68 memcpy(pv, buffer_, read); | |
| 69 data_len_ -= read; | |
| 70 if (data_len_ > 0) { | |
| 71 memmove(buffer_, buffer_ + read, data_len_); | |
| 72 } | |
| 73 pv = static_cast<char *>(pv) + read; | |
| 74 cb -= read; | |
| 75 } | |
| 76 | |
| 77 // FIX: If cb == 0, we won't generate another read event | |
| 78 | |
| 79 int res = AsyncSocketAdapter::Recv(pv, cb, timestamp); | |
| 80 if (res >= 0) { | |
| 81 // Read from socket and possibly buffer; return combined length | |
| 82 return res + static_cast<int>(read); | |
| 83 } | |
| 84 | |
| 85 if (read > 0) { | |
| 86 // Failed to read from socket, but still read something from buffer | |
| 87 return static_cast<int>(read); | |
| 88 } | |
| 89 | |
| 90 // Didn't read anything; return error from socket | |
| 91 return res; | |
| 92 } | |
| 93 | |
| 94 void BufferedReadAdapter::BufferInput(bool on) { | |
| 95 buffering_ = on; | |
| 96 } | |
| 97 | |
| 98 void BufferedReadAdapter::OnReadEvent(AsyncSocket * socket) { | |
| 99 RTC_DCHECK(socket == socket_); | |
| 100 | |
| 101 if (!buffering_) { | |
| 102 AsyncSocketAdapter::OnReadEvent(socket); | |
| 103 return; | |
| 104 } | |
| 105 | |
| 106 if (data_len_ >= buffer_size_) { | |
| 107 LOG(INFO) << "Input buffer overflow"; | |
| 108 RTC_NOTREACHED(); | |
| 109 data_len_ = 0; | |
| 110 } | |
| 111 | |
| 112 int len = | |
| 113 socket_->Recv(buffer_ + data_len_, buffer_size_ - data_len_, nullptr); | |
| 114 if (len < 0) { | |
| 115 // TODO: Do something better like forwarding the error to the user. | |
| 116 LOG_ERR(INFO) << "Recv"; | |
| 117 return; | |
| 118 } | |
| 119 | |
| 120 data_len_ += len; | |
| 121 | |
| 122 ProcessInput(buffer_, &data_len_); | |
| 123 } | |
| 124 | |
| 125 AsyncProxyServerSocket::AsyncProxyServerSocket(AsyncSocket* socket, | |
| 126 size_t buffer_size) | |
| 127 : BufferedReadAdapter(socket, buffer_size) { | |
| 128 } | |
| 129 | |
| 130 AsyncProxyServerSocket::~AsyncProxyServerSocket() = default; | |
| 131 | |
| 132 /////////////////////////////////////////////////////////////////////////////// | |
| 133 | |
| 134 // This is a SSL v2 CLIENT_HELLO message. | |
| 135 // TODO: Should this have a session id? The response doesn't have a | |
| 136 // certificate, so the hello should have a session id. | |
| 137 static const uint8_t kSslClientHello[] = { | |
| 138 0x80, 0x46, // msg len | |
| 139 0x01, // CLIENT_HELLO | |
| 140 0x03, 0x01, // SSL 3.1 | |
| 141 0x00, 0x2d, // ciphersuite len | |
| 142 0x00, 0x00, // session id len | |
| 143 0x00, 0x10, // challenge len | |
| 144 0x01, 0x00, 0x80, 0x03, 0x00, 0x80, 0x07, 0x00, 0xc0, // ciphersuites | |
| 145 0x06, 0x00, 0x40, 0x02, 0x00, 0x80, 0x04, 0x00, 0x80, // | |
| 146 0x00, 0x00, 0x04, 0x00, 0xfe, 0xff, 0x00, 0x00, 0x0a, // | |
| 147 0x00, 0xfe, 0xfe, 0x00, 0x00, 0x09, 0x00, 0x00, 0x64, // | |
| 148 0x00, 0x00, 0x62, 0x00, 0x00, 0x03, 0x00, 0x00, 0x06, // | |
| 149 0x1f, 0x17, 0x0c, 0xa6, 0x2f, 0x00, 0x78, 0xfc, // challenge | |
| 150 0x46, 0x55, 0x2e, 0xb1, 0x83, 0x39, 0xf1, 0xea // | |
| 151 }; | |
| 152 | |
| 153 // This is a TLSv1 SERVER_HELLO message. | |
| 154 static const uint8_t kSslServerHello[] = { | |
| 155 0x16, // handshake message | |
| 156 0x03, 0x01, // SSL 3.1 | |
| 157 0x00, 0x4a, // message len | |
| 158 0x02, // SERVER_HELLO | |
| 159 0x00, 0x00, 0x46, // handshake len | |
| 160 0x03, 0x01, // SSL 3.1 | |
| 161 0x42, 0x85, 0x45, 0xa7, 0x27, 0xa9, 0x5d, 0xa0, // server random | |
| 162 0xb3, 0xc5, 0xe7, 0x53, 0xda, 0x48, 0x2b, 0x3f, // | |
| 163 0xc6, 0x5a, 0xca, 0x89, 0xc1, 0x58, 0x52, 0xa1, // | |
| 164 0x78, 0x3c, 0x5b, 0x17, 0x46, 0x00, 0x85, 0x3f, // | |
| 165 0x20, // session id len | |
| 166 0x0e, 0xd3, 0x06, 0x72, 0x5b, 0x5b, 0x1b, 0x5f, // session id | |
| 167 0x15, 0xac, 0x13, 0xf9, 0x88, 0x53, 0x9d, 0x9b, // | |
| 168 0xe8, 0x3d, 0x7b, 0x0c, 0x30, 0x32, 0x6e, 0x38, // | |
| 169 0x4d, 0xa2, 0x75, 0x57, 0x41, 0x6c, 0x34, 0x5c, // | |
| 170 0x00, 0x04, // RSA/RC4-128/MD5 | |
| 171 0x00 // null compression | |
| 172 }; | |
| 173 | |
| 174 AsyncSSLSocket::AsyncSSLSocket(AsyncSocket* socket) | |
| 175 : BufferedReadAdapter(socket, 1024) { | |
| 176 } | |
| 177 | |
| 178 int AsyncSSLSocket::Connect(const SocketAddress& addr) { | |
| 179 // Begin buffering before we connect, so that there isn't a race condition | |
| 180 // between potential senders and receiving the OnConnectEvent signal | |
| 181 BufferInput(true); | |
| 182 return BufferedReadAdapter::Connect(addr); | |
| 183 } | |
| 184 | |
| 185 void AsyncSSLSocket::OnConnectEvent(AsyncSocket * socket) { | |
| 186 RTC_DCHECK(socket == socket_); | |
| 187 // TODO: we could buffer output too... | |
| 188 const int res = DirectSend(kSslClientHello, sizeof(kSslClientHello)); | |
| 189 RTC_DCHECK_EQ(sizeof(kSslClientHello), res); | |
| 190 } | |
| 191 | |
| 192 void AsyncSSLSocket::ProcessInput(char* data, size_t* len) { | |
| 193 if (*len < sizeof(kSslServerHello)) | |
| 194 return; | |
| 195 | |
| 196 if (memcmp(kSslServerHello, data, sizeof(kSslServerHello)) != 0) { | |
| 197 Close(); | |
| 198 SignalCloseEvent(this, 0); // TODO: error code? | |
| 199 return; | |
| 200 } | |
| 201 | |
| 202 *len -= sizeof(kSslServerHello); | |
| 203 if (*len > 0) { | |
| 204 memmove(data, data + sizeof(kSslServerHello), *len); | |
| 205 } | |
| 206 | |
| 207 bool remainder = (*len > 0); | |
| 208 BufferInput(false); | |
| 209 SignalConnectEvent(this); | |
| 210 | |
| 211 // FIX: if SignalConnect causes the socket to be destroyed, we are in trouble | |
| 212 if (remainder) | |
| 213 SignalReadEvent(this); | |
| 214 } | |
| 215 | |
| 216 AsyncSSLServerSocket::AsyncSSLServerSocket(AsyncSocket* socket) | |
| 217 : BufferedReadAdapter(socket, 1024) { | |
| 218 BufferInput(true); | |
| 219 } | |
| 220 | |
| 221 void AsyncSSLServerSocket::ProcessInput(char* data, size_t* len) { | |
| 222 // We only accept client hello messages. | |
| 223 if (*len < sizeof(kSslClientHello)) { | |
| 224 return; | |
| 225 } | |
| 226 | |
| 227 if (memcmp(kSslClientHello, data, sizeof(kSslClientHello)) != 0) { | |
| 228 Close(); | |
| 229 SignalCloseEvent(this, 0); | |
| 230 return; | |
| 231 } | |
| 232 | |
| 233 *len -= sizeof(kSslClientHello); | |
| 234 | |
| 235 // Clients should not send more data until the handshake is completed. | |
| 236 RTC_DCHECK(*len == 0); | |
| 237 | |
| 238 // Send a server hello back to the client. | |
| 239 DirectSend(kSslServerHello, sizeof(kSslServerHello)); | |
| 240 | |
| 241 // Handshake completed for us, redirect input to our parent. | |
| 242 BufferInput(false); | |
| 243 } | |
| 244 | |
| 245 /////////////////////////////////////////////////////////////////////////////// | |
| 246 | |
| 247 AsyncHttpsProxySocket::AsyncHttpsProxySocket(AsyncSocket* socket, | |
| 248 const std::string& user_agent, | |
| 249 const SocketAddress& proxy, | |
| 250 const std::string& username, | |
| 251 const CryptString& password) | |
| 252 : BufferedReadAdapter(socket, 1024), proxy_(proxy), agent_(user_agent), | |
| 253 user_(username), pass_(password), force_connect_(false), state_(PS_ERROR), | |
| 254 context_(0) { | |
| 255 } | |
| 256 | |
| 257 AsyncHttpsProxySocket::~AsyncHttpsProxySocket() { | |
| 258 delete context_; | |
| 259 } | |
| 260 | |
| 261 int AsyncHttpsProxySocket::Connect(const SocketAddress& addr) { | |
| 262 int ret; | |
| 263 LOG(LS_VERBOSE) << "AsyncHttpsProxySocket::Connect(" | |
| 264 << proxy_.ToSensitiveString() << ")"; | |
| 265 dest_ = addr; | |
| 266 state_ = PS_INIT; | |
| 267 if (ShouldIssueConnect()) { | |
| 268 BufferInput(true); | |
| 269 } | |
| 270 ret = BufferedReadAdapter::Connect(proxy_); | |
| 271 // TODO: Set state_ appropriately if Connect fails. | |
| 272 return ret; | |
| 273 } | |
| 274 | |
| 275 SocketAddress AsyncHttpsProxySocket::GetRemoteAddress() const { | |
| 276 return dest_; | |
| 277 } | |
| 278 | |
| 279 int AsyncHttpsProxySocket::Close() { | |
| 280 headers_.clear(); | |
| 281 state_ = PS_ERROR; | |
| 282 dest_.Clear(); | |
| 283 delete context_; | |
| 284 context_ = nullptr; | |
| 285 return BufferedReadAdapter::Close(); | |
| 286 } | |
| 287 | |
| 288 Socket::ConnState AsyncHttpsProxySocket::GetState() const { | |
| 289 if (state_ < PS_TUNNEL) { | |
| 290 return CS_CONNECTING; | |
| 291 } else if (state_ == PS_TUNNEL) { | |
| 292 return CS_CONNECTED; | |
| 293 } else { | |
| 294 return CS_CLOSED; | |
| 295 } | |
| 296 } | |
| 297 | |
| 298 void AsyncHttpsProxySocket::OnConnectEvent(AsyncSocket * socket) { | |
| 299 LOG(LS_VERBOSE) << "AsyncHttpsProxySocket::OnConnectEvent"; | |
| 300 if (!ShouldIssueConnect()) { | |
| 301 state_ = PS_TUNNEL; | |
| 302 BufferedReadAdapter::OnConnectEvent(socket); | |
| 303 return; | |
| 304 } | |
| 305 SendRequest(); | |
| 306 } | |
| 307 | |
| 308 void AsyncHttpsProxySocket::OnCloseEvent(AsyncSocket * socket, int err) { | |
| 309 LOG(LS_VERBOSE) << "AsyncHttpsProxySocket::OnCloseEvent(" << err << ")"; | |
| 310 if ((state_ == PS_WAIT_CLOSE) && (err == 0)) { | |
| 311 state_ = PS_ERROR; | |
| 312 Connect(dest_); | |
| 313 } else { | |
| 314 BufferedReadAdapter::OnCloseEvent(socket, err); | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 void AsyncHttpsProxySocket::ProcessInput(char* data, size_t* len) { | |
| 319 size_t start = 0; | |
| 320 for (size_t pos = start; state_ < PS_TUNNEL && pos < *len;) { | |
| 321 if (state_ == PS_SKIP_BODY) { | |
| 322 size_t consume = std::min(*len - pos, content_length_); | |
| 323 pos += consume; | |
| 324 start = pos; | |
| 325 content_length_ -= consume; | |
| 326 if (content_length_ == 0) { | |
| 327 EndResponse(); | |
| 328 } | |
| 329 continue; | |
| 330 } | |
| 331 | |
| 332 if (data[pos++] != '\n') | |
| 333 continue; | |
| 334 | |
| 335 size_t len = pos - start - 1; | |
| 336 if ((len > 0) && (data[start + len - 1] == '\r')) | |
| 337 --len; | |
| 338 | |
| 339 data[start + len] = 0; | |
| 340 ProcessLine(data + start, len); | |
| 341 start = pos; | |
| 342 } | |
| 343 | |
| 344 *len -= start; | |
| 345 if (*len > 0) { | |
| 346 memmove(data, data + start, *len); | |
| 347 } | |
| 348 | |
| 349 if (state_ != PS_TUNNEL) | |
| 350 return; | |
| 351 | |
| 352 bool remainder = (*len > 0); | |
| 353 BufferInput(false); | |
| 354 SignalConnectEvent(this); | |
| 355 | |
| 356 // FIX: if SignalConnect causes the socket to be destroyed, we are in trouble | |
| 357 if (remainder) | |
| 358 SignalReadEvent(this); // TODO: signal this?? | |
| 359 } | |
| 360 | |
| 361 bool AsyncHttpsProxySocket::ShouldIssueConnect() const { | |
| 362 // TODO: Think about whether a more sophisticated test | |
| 363 // than dest port == 80 is needed. | |
| 364 return force_connect_ || (dest_.port() != 80); | |
| 365 } | |
| 366 | |
| 367 void AsyncHttpsProxySocket::SendRequest() { | |
| 368 std::stringstream ss; | |
| 369 ss << "CONNECT " << dest_.ToString() << " HTTP/1.0\r\n"; | |
| 370 ss << "User-Agent: " << agent_ << "\r\n"; | |
| 371 ss << "Host: " << dest_.HostAsURIString() << "\r\n"; | |
| 372 ss << "Content-Length: 0\r\n"; | |
| 373 ss << "Proxy-Connection: Keep-Alive\r\n"; | |
| 374 ss << headers_; | |
| 375 ss << "\r\n"; | |
| 376 std::string str = ss.str(); | |
| 377 DirectSend(str.c_str(), str.size()); | |
| 378 state_ = PS_LEADER; | |
| 379 expect_close_ = true; | |
| 380 content_length_ = 0; | |
| 381 headers_.clear(); | |
| 382 | |
| 383 LOG(LS_VERBOSE) << "AsyncHttpsProxySocket >> " << str; | |
| 384 } | |
| 385 | |
| 386 void AsyncHttpsProxySocket::ProcessLine(char * data, size_t len) { | |
| 387 LOG(LS_VERBOSE) << "AsyncHttpsProxySocket << " << data; | |
| 388 | |
| 389 if (len == 0) { | |
| 390 if (state_ == PS_TUNNEL_HEADERS) { | |
| 391 state_ = PS_TUNNEL; | |
| 392 } else if (state_ == PS_ERROR_HEADERS) { | |
| 393 Error(defer_error_); | |
| 394 return; | |
| 395 } else if (state_ == PS_SKIP_HEADERS) { | |
| 396 if (content_length_) { | |
| 397 state_ = PS_SKIP_BODY; | |
| 398 } else { | |
| 399 EndResponse(); | |
| 400 return; | |
| 401 } | |
| 402 } else { | |
| 403 static bool report = false; | |
| 404 if (!unknown_mechanisms_.empty() && !report) { | |
| 405 report = true; | |
| 406 std::string msg( | |
| 407 "Unable to connect to the Google Talk service due to an incompatibilit
y " | |
| 408 "with your proxy.\r\nPlease help us resolve this issue by submitting t
he " | |
| 409 "following information to us using our technical issue submission form
" | |
| 410 "at:\r\n\r\n" | |
| 411 "http://www.google.com/support/talk/bin/request.py\r\n\r\n" | |
| 412 "We apologize for the inconvenience.\r\n\r\n" | |
| 413 "Information to submit to Google: " | |
| 414 ); | |
| 415 //std::string msg("Please report the following information to foo@bar.co
m:\r\nUnknown methods: "); | |
| 416 msg.append(unknown_mechanisms_); | |
| 417 #if defined(WEBRTC_WIN) | |
| 418 MessageBoxA(0, msg.c_str(), "Oops!", MB_OK); | |
| 419 #endif | |
| 420 #if defined(WEBRTC_POSIX) | |
| 421 // TODO: Raise a signal so the UI can be separated. | |
| 422 LOG(LS_ERROR) << "Oops!\n\n" << msg; | |
| 423 #endif | |
| 424 } | |
| 425 // Unexpected end of headers | |
| 426 Error(0); | |
| 427 return; | |
| 428 } | |
| 429 } else if (state_ == PS_LEADER) { | |
| 430 unsigned int code; | |
| 431 if (sscanf(data, "HTTP/%*u.%*u %u", &code) != 1) { | |
| 432 Error(0); | |
| 433 return; | |
| 434 } | |
| 435 switch (code) { | |
| 436 case 200: | |
| 437 // connection good! | |
| 438 state_ = PS_TUNNEL_HEADERS; | |
| 439 return; | |
| 440 #if defined(HTTP_STATUS_PROXY_AUTH_REQ) && (HTTP_STATUS_PROXY_AUTH_REQ != 407) | |
| 441 #error Wrong code for HTTP_STATUS_PROXY_AUTH_REQ | |
| 442 #endif | |
| 443 case 407: // HTTP_STATUS_PROXY_AUTH_REQ | |
| 444 state_ = PS_AUTHENTICATE; | |
| 445 return; | |
| 446 default: | |
| 447 defer_error_ = 0; | |
| 448 state_ = PS_ERROR_HEADERS; | |
| 449 return; | |
| 450 } | |
| 451 } else if ((state_ == PS_AUTHENTICATE) | |
| 452 && (_strnicmp(data, "Proxy-Authenticate:", 19) == 0)) { | |
| 453 std::string response, auth_method; | |
| 454 switch (HttpAuthenticate(data + 19, len - 19, | |
| 455 proxy_, "CONNECT", "/", | |
| 456 user_, pass_, context_, response, auth_method)) { | |
| 457 case HAR_IGNORE: | |
| 458 LOG(LS_VERBOSE) << "Ignoring Proxy-Authenticate: " << auth_method; | |
| 459 if (!unknown_mechanisms_.empty()) | |
| 460 unknown_mechanisms_.append(", "); | |
| 461 unknown_mechanisms_.append(auth_method); | |
| 462 break; | |
| 463 case HAR_RESPONSE: | |
| 464 headers_ = "Proxy-Authorization: "; | |
| 465 headers_.append(response); | |
| 466 headers_.append("\r\n"); | |
| 467 state_ = PS_SKIP_HEADERS; | |
| 468 unknown_mechanisms_.clear(); | |
| 469 break; | |
| 470 case HAR_CREDENTIALS: | |
| 471 defer_error_ = SOCKET_EACCES; | |
| 472 state_ = PS_ERROR_HEADERS; | |
| 473 unknown_mechanisms_.clear(); | |
| 474 break; | |
| 475 case HAR_ERROR: | |
| 476 defer_error_ = 0; | |
| 477 state_ = PS_ERROR_HEADERS; | |
| 478 unknown_mechanisms_.clear(); | |
| 479 break; | |
| 480 } | |
| 481 } else if (_strnicmp(data, "Content-Length:", 15) == 0) { | |
| 482 content_length_ = strtoul(data + 15, 0, 0); | |
| 483 } else if (_strnicmp(data, "Proxy-Connection: Keep-Alive", 28) == 0) { | |
| 484 expect_close_ = false; | |
| 485 /* | |
| 486 } else if (_strnicmp(data, "Connection: close", 17) == 0) { | |
| 487 expect_close_ = true; | |
| 488 */ | |
| 489 } | |
| 490 } | |
| 491 | |
| 492 void AsyncHttpsProxySocket::EndResponse() { | |
| 493 if (!expect_close_) { | |
| 494 SendRequest(); | |
| 495 return; | |
| 496 } | |
| 497 | |
| 498 // No point in waiting for the server to close... let's close now | |
| 499 // TODO: Refactor out PS_WAIT_CLOSE | |
| 500 state_ = PS_WAIT_CLOSE; | |
| 501 BufferedReadAdapter::Close(); | |
| 502 OnCloseEvent(this, 0); | |
| 503 } | |
| 504 | |
| 505 void AsyncHttpsProxySocket::Error(int error) { | |
| 506 BufferInput(false); | |
| 507 Close(); | |
| 508 SetError(error); | |
| 509 SignalCloseEvent(this, error); | |
| 510 } | |
| 511 | |
| 512 /////////////////////////////////////////////////////////////////////////////// | |
| 513 | |
| 514 AsyncSocksProxySocket::AsyncSocksProxySocket(AsyncSocket* socket, | |
| 515 const SocketAddress& proxy, | |
| 516 const std::string& username, | |
| 517 const CryptString& password) | |
| 518 : BufferedReadAdapter(socket, 1024), state_(SS_ERROR), proxy_(proxy), | |
| 519 user_(username), pass_(password) { | |
| 520 } | |
| 521 | |
| 522 AsyncSocksProxySocket::~AsyncSocksProxySocket() = default; | |
| 523 | |
| 524 int AsyncSocksProxySocket::Connect(const SocketAddress& addr) { | |
| 525 int ret; | |
| 526 dest_ = addr; | |
| 527 state_ = SS_INIT; | |
| 528 BufferInput(true); | |
| 529 ret = BufferedReadAdapter::Connect(proxy_); | |
| 530 // TODO: Set state_ appropriately if Connect fails. | |
| 531 return ret; | |
| 532 } | |
| 533 | |
| 534 SocketAddress AsyncSocksProxySocket::GetRemoteAddress() const { | |
| 535 return dest_; | |
| 536 } | |
| 537 | |
| 538 int AsyncSocksProxySocket::Close() { | |
| 539 state_ = SS_ERROR; | |
| 540 dest_.Clear(); | |
| 541 return BufferedReadAdapter::Close(); | |
| 542 } | |
| 543 | |
| 544 Socket::ConnState AsyncSocksProxySocket::GetState() const { | |
| 545 if (state_ < SS_TUNNEL) { | |
| 546 return CS_CONNECTING; | |
| 547 } else if (state_ == SS_TUNNEL) { | |
| 548 return CS_CONNECTED; | |
| 549 } else { | |
| 550 return CS_CLOSED; | |
| 551 } | |
| 552 } | |
| 553 | |
| 554 void AsyncSocksProxySocket::OnConnectEvent(AsyncSocket* socket) { | |
| 555 SendHello(); | |
| 556 } | |
| 557 | |
| 558 void AsyncSocksProxySocket::ProcessInput(char* data, size_t* len) { | |
| 559 RTC_DCHECK(state_ < SS_TUNNEL); | |
| 560 | |
| 561 ByteBufferReader response(data, *len); | |
| 562 | |
| 563 if (state_ == SS_HELLO) { | |
| 564 uint8_t ver, method; | |
| 565 if (!response.ReadUInt8(&ver) || | |
| 566 !response.ReadUInt8(&method)) | |
| 567 return; | |
| 568 | |
| 569 if (ver != 5) { | |
| 570 Error(0); | |
| 571 return; | |
| 572 } | |
| 573 | |
| 574 if (method == 0) { | |
| 575 SendConnect(); | |
| 576 } else if (method == 2) { | |
| 577 SendAuth(); | |
| 578 } else { | |
| 579 Error(0); | |
| 580 return; | |
| 581 } | |
| 582 } else if (state_ == SS_AUTH) { | |
| 583 uint8_t ver, status; | |
| 584 if (!response.ReadUInt8(&ver) || | |
| 585 !response.ReadUInt8(&status)) | |
| 586 return; | |
| 587 | |
| 588 if ((ver != 1) || (status != 0)) { | |
| 589 Error(SOCKET_EACCES); | |
| 590 return; | |
| 591 } | |
| 592 | |
| 593 SendConnect(); | |
| 594 } else if (state_ == SS_CONNECT) { | |
| 595 uint8_t ver, rep, rsv, atyp; | |
| 596 if (!response.ReadUInt8(&ver) || | |
| 597 !response.ReadUInt8(&rep) || | |
| 598 !response.ReadUInt8(&rsv) || | |
| 599 !response.ReadUInt8(&atyp)) | |
| 600 return; | |
| 601 | |
| 602 if ((ver != 5) || (rep != 0)) { | |
| 603 Error(0); | |
| 604 return; | |
| 605 } | |
| 606 | |
| 607 uint16_t port; | |
| 608 if (atyp == 1) { | |
| 609 uint32_t addr; | |
| 610 if (!response.ReadUInt32(&addr) || | |
| 611 !response.ReadUInt16(&port)) | |
| 612 return; | |
| 613 LOG(LS_VERBOSE) << "Bound on " << addr << ":" << port; | |
| 614 } else if (atyp == 3) { | |
| 615 uint8_t len; | |
| 616 std::string addr; | |
| 617 if (!response.ReadUInt8(&len) || | |
| 618 !response.ReadString(&addr, len) || | |
| 619 !response.ReadUInt16(&port)) | |
| 620 return; | |
| 621 LOG(LS_VERBOSE) << "Bound on " << addr << ":" << port; | |
| 622 } else if (atyp == 4) { | |
| 623 std::string addr; | |
| 624 if (!response.ReadString(&addr, 16) || | |
| 625 !response.ReadUInt16(&port)) | |
| 626 return; | |
| 627 LOG(LS_VERBOSE) << "Bound on <IPV6>:" << port; | |
| 628 } else { | |
| 629 Error(0); | |
| 630 return; | |
| 631 } | |
| 632 | |
| 633 state_ = SS_TUNNEL; | |
| 634 } | |
| 635 | |
| 636 // Consume parsed data | |
| 637 *len = response.Length(); | |
| 638 memmove(data, response.Data(), *len); | |
| 639 | |
| 640 if (state_ != SS_TUNNEL) | |
| 641 return; | |
| 642 | |
| 643 bool remainder = (*len > 0); | |
| 644 BufferInput(false); | |
| 645 SignalConnectEvent(this); | |
| 646 | |
| 647 // FIX: if SignalConnect causes the socket to be destroyed, we are in trouble | |
| 648 if (remainder) | |
| 649 SignalReadEvent(this); // TODO: signal this?? | |
| 650 } | |
| 651 | |
| 652 void AsyncSocksProxySocket::SendHello() { | |
| 653 ByteBufferWriter request; | |
| 654 request.WriteUInt8(5); // Socks Version | |
| 655 if (user_.empty()) { | |
| 656 request.WriteUInt8(1); // Authentication Mechanisms | |
| 657 request.WriteUInt8(0); // No authentication | |
| 658 } else { | |
| 659 request.WriteUInt8(2); // Authentication Mechanisms | |
| 660 request.WriteUInt8(0); // No authentication | |
| 661 request.WriteUInt8(2); // Username/Password | |
| 662 } | |
| 663 DirectSend(request.Data(), request.Length()); | |
| 664 state_ = SS_HELLO; | |
| 665 } | |
| 666 | |
| 667 void AsyncSocksProxySocket::SendAuth() { | |
| 668 ByteBufferWriter request; | |
| 669 request.WriteUInt8(1); // Negotiation Version | |
| 670 request.WriteUInt8(static_cast<uint8_t>(user_.size())); | |
| 671 request.WriteString(user_); // Username | |
| 672 request.WriteUInt8(static_cast<uint8_t>(pass_.GetLength())); | |
| 673 size_t len = pass_.GetLength() + 1; | |
| 674 char * sensitive = new char[len]; | |
| 675 pass_.CopyTo(sensitive, true); | |
| 676 request.WriteString(sensitive); // Password | |
| 677 memset(sensitive, 0, len); | |
| 678 delete [] sensitive; | |
| 679 DirectSend(request.Data(), request.Length()); | |
| 680 state_ = SS_AUTH; | |
| 681 } | |
| 682 | |
| 683 void AsyncSocksProxySocket::SendConnect() { | |
| 684 ByteBufferWriter request; | |
| 685 request.WriteUInt8(5); // Socks Version | |
| 686 request.WriteUInt8(1); // CONNECT | |
| 687 request.WriteUInt8(0); // Reserved | |
| 688 if (dest_.IsUnresolvedIP()) { | |
| 689 std::string hostname = dest_.hostname(); | |
| 690 request.WriteUInt8(3); // DOMAINNAME | |
| 691 request.WriteUInt8(static_cast<uint8_t>(hostname.size())); | |
| 692 request.WriteString(hostname); // Destination Hostname | |
| 693 } else { | |
| 694 request.WriteUInt8(1); // IPV4 | |
| 695 request.WriteUInt32(dest_.ip()); // Destination IP | |
| 696 } | |
| 697 request.WriteUInt16(dest_.port()); // Destination Port | |
| 698 DirectSend(request.Data(), request.Length()); | |
| 699 state_ = SS_CONNECT; | |
| 700 } | |
| 701 | |
| 702 void AsyncSocksProxySocket::Error(int error) { | |
| 703 state_ = SS_ERROR; | |
| 704 BufferInput(false); | |
| 705 Close(); | |
| 706 SetError(SOCKET_EACCES); | |
| 707 SignalCloseEvent(this, error); | |
| 708 } | |
| 709 | |
| 710 AsyncSocksProxyServerSocket::AsyncSocksProxyServerSocket(AsyncSocket* socket) | |
| 711 : AsyncProxyServerSocket(socket, kBufferSize), state_(SS_HELLO) { | |
| 712 BufferInput(true); | |
| 713 } | |
| 714 | |
| 715 void AsyncSocksProxyServerSocket::ProcessInput(char* data, size_t* len) { | |
| 716 // TODO: See if the whole message has arrived | |
| 717 RTC_DCHECK(state_ < SS_CONNECT_PENDING); | |
| 718 | |
| 719 ByteBufferReader response(data, *len); | |
| 720 if (state_ == SS_HELLO) { | |
| 721 HandleHello(&response); | |
| 722 } else if (state_ == SS_AUTH) { | |
| 723 HandleAuth(&response); | |
| 724 } else if (state_ == SS_CONNECT) { | |
| 725 HandleConnect(&response); | |
| 726 } | |
| 727 | |
| 728 // Consume parsed data | |
| 729 *len = response.Length(); | |
| 730 memmove(data, response.Data(), *len); | |
| 731 } | |
| 732 | |
| 733 void AsyncSocksProxyServerSocket::DirectSend(const ByteBufferWriter& buf) { | |
| 734 BufferedReadAdapter::DirectSend(buf.Data(), buf.Length()); | |
| 735 } | |
| 736 | |
| 737 void AsyncSocksProxyServerSocket::HandleHello(ByteBufferReader* request) { | |
| 738 uint8_t ver, num_methods; | |
| 739 if (!request->ReadUInt8(&ver) || | |
| 740 !request->ReadUInt8(&num_methods)) { | |
| 741 Error(0); | |
| 742 return; | |
| 743 } | |
| 744 | |
| 745 if (ver != 5) { | |
| 746 Error(0); | |
| 747 return; | |
| 748 } | |
| 749 | |
| 750 // Handle either no-auth (0) or user/pass auth (2) | |
| 751 uint8_t method = 0xFF; | |
| 752 if (num_methods > 0 && !request->ReadUInt8(&method)) { | |
| 753 Error(0); | |
| 754 return; | |
| 755 } | |
| 756 | |
| 757 // TODO: Ask the server which method to use. | |
| 758 SendHelloReply(method); | |
| 759 if (method == 0) { | |
| 760 state_ = SS_CONNECT; | |
| 761 } else if (method == 2) { | |
| 762 state_ = SS_AUTH; | |
| 763 } else { | |
| 764 state_ = SS_ERROR; | |
| 765 } | |
| 766 } | |
| 767 | |
| 768 void AsyncSocksProxyServerSocket::SendHelloReply(uint8_t method) { | |
| 769 ByteBufferWriter response; | |
| 770 response.WriteUInt8(5); // Socks Version | |
| 771 response.WriteUInt8(method); // Auth method | |
| 772 DirectSend(response); | |
| 773 } | |
| 774 | |
| 775 void AsyncSocksProxyServerSocket::HandleAuth(ByteBufferReader* request) { | |
| 776 uint8_t ver, user_len, pass_len; | |
| 777 std::string user, pass; | |
| 778 if (!request->ReadUInt8(&ver) || | |
| 779 !request->ReadUInt8(&user_len) || | |
| 780 !request->ReadString(&user, user_len) || | |
| 781 !request->ReadUInt8(&pass_len) || | |
| 782 !request->ReadString(&pass, pass_len)) { | |
| 783 Error(0); | |
| 784 return; | |
| 785 } | |
| 786 | |
| 787 // TODO: Allow for checking of credentials. | |
| 788 SendAuthReply(0); | |
| 789 state_ = SS_CONNECT; | |
| 790 } | |
| 791 | |
| 792 void AsyncSocksProxyServerSocket::SendAuthReply(uint8_t result) { | |
| 793 ByteBufferWriter response; | |
| 794 response.WriteUInt8(1); // Negotiation Version | |
| 795 response.WriteUInt8(result); | |
| 796 DirectSend(response); | |
| 797 } | |
| 798 | |
| 799 void AsyncSocksProxyServerSocket::HandleConnect(ByteBufferReader* request) { | |
| 800 uint8_t ver, command, reserved, addr_type; | |
| 801 uint32_t ip; | |
| 802 uint16_t port; | |
| 803 if (!request->ReadUInt8(&ver) || | |
| 804 !request->ReadUInt8(&command) || | |
| 805 !request->ReadUInt8(&reserved) || | |
| 806 !request->ReadUInt8(&addr_type) || | |
| 807 !request->ReadUInt32(&ip) || | |
| 808 !request->ReadUInt16(&port)) { | |
| 809 Error(0); | |
| 810 return; | |
| 811 } | |
| 812 | |
| 813 if (ver != 5 || command != 1 || | |
| 814 reserved != 0 || addr_type != 1) { | |
| 815 Error(0); | |
| 816 return; | |
| 817 } | |
| 818 | |
| 819 SignalConnectRequest(this, SocketAddress(ip, port)); | |
| 820 state_ = SS_CONNECT_PENDING; | |
| 821 } | |
| 822 | |
| 823 void AsyncSocksProxyServerSocket::SendConnectResult(int result, | |
| 824 const SocketAddress& addr) { | |
| 825 if (state_ != SS_CONNECT_PENDING) | |
| 826 return; | |
| 827 | |
| 828 ByteBufferWriter response; | |
| 829 response.WriteUInt8(5); // Socks version | |
| 830 response.WriteUInt8((result != 0)); // 0x01 is generic error | |
| 831 response.WriteUInt8(0); // reserved | |
| 832 response.WriteUInt8(1); // IPv4 address | |
| 833 response.WriteUInt32(addr.ip()); | |
| 834 response.WriteUInt16(addr.port()); | |
| 835 DirectSend(response); | |
| 836 BufferInput(false); | |
| 837 state_ = SS_TUNNEL; | |
| 838 } | |
| 839 | |
| 840 void AsyncSocksProxyServerSocket::Error(int error) { | |
| 841 state_ = SS_ERROR; | |
| 842 BufferInput(false); | |
| 843 Close(); | |
| 844 SetError(SOCKET_EACCES); | |
| 845 SignalCloseEvent(this, error); | |
| 846 } | |
| 847 | |
| 848 } // namespace rtc | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2877023002:
Move webrtc/{base => rtc_base} (Closed)
