henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 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 | #include "webrtc/base/win32socketserver.h" |
| 12 | #include "webrtc/base/byteorder.h" |
| 13 | #include "webrtc/base/common.h" |
| 14 | #include "webrtc/base/logging.h" |
| 15 | #include "webrtc/base/winping.h" |
| 16 | #include "webrtc/base/win32window.h" |
| 17 | #include <ws2tcpip.h> // NOLINT |
| 18 | |
| 19 | namespace rtc { |
| 20 | |
| 21 | /////////////////////////////////////////////////////////////////////////////// |
| 22 | // Win32Socket |
| 23 | /////////////////////////////////////////////////////////////////////////////// |
| 24 | |
| 25 | // TODO: Move this to a common place where PhysicalSocketServer can |
| 26 | // share it. |
| 27 | // Standard MTUs |
| 28 | static const uint16 PACKET_MAXIMUMS[] = { |
| 29 | 65535, // Theoretical maximum, Hyperchannel |
| 30 | 32000, // Nothing |
| 31 | 17914, // 16Mb IBM Token Ring |
| 32 | 8166, // IEEE 802.4 |
| 33 | // 4464 // IEEE 802.5 (4Mb max) |
| 34 | 4352, // FDDI |
| 35 | // 2048, // Wideband Network |
| 36 | 2002, // IEEE 802.5 (4Mb recommended) |
| 37 | // 1536, // Expermental Ethernet Networks |
| 38 | // 1500, // Ethernet, Point-to-Point (default) |
| 39 | 1492, // IEEE 802.3 |
| 40 | 1006, // SLIP, ARPANET |
| 41 | // 576, // X.25 Networks |
| 42 | // 544, // DEC IP Portal |
| 43 | // 512, // NETBIOS |
| 44 | 508, // IEEE 802/Source-Rt Bridge, ARCNET |
| 45 | 296, // Point-to-Point (low delay) |
| 46 | 68, // Official minimum |
| 47 | 0, // End of list marker |
| 48 | }; |
| 49 | |
| 50 | static const int IP_HEADER_SIZE = 20u; |
| 51 | static const int ICMP_HEADER_SIZE = 8u; |
| 52 | static const int ICMP_PING_TIMEOUT_MILLIS = 10000u; |
| 53 | |
| 54 | // TODO: Enable for production builds also? Use FormatMessage? |
| 55 | #ifdef _DEBUG |
| 56 | LPCSTR WSAErrorToString(int error, LPCSTR *description_result) { |
| 57 | LPCSTR string = "Unspecified"; |
| 58 | LPCSTR description = "Unspecified description"; |
| 59 | switch (error) { |
| 60 | case ERROR_SUCCESS: |
| 61 | string = "SUCCESS"; |
| 62 | description = "Operation succeeded"; |
| 63 | break; |
| 64 | case WSAEWOULDBLOCK: |
| 65 | string = "WSAEWOULDBLOCK"; |
| 66 | description = "Using a non-blocking socket, will notify later"; |
| 67 | break; |
| 68 | case WSAEACCES: |
| 69 | string = "WSAEACCES"; |
| 70 | description = "Access denied, or sharing violation"; |
| 71 | break; |
| 72 | case WSAEADDRNOTAVAIL: |
| 73 | string = "WSAEADDRNOTAVAIL"; |
| 74 | description = "Address is not valid in this context"; |
| 75 | break; |
| 76 | case WSAENETDOWN: |
| 77 | string = "WSAENETDOWN"; |
| 78 | description = "Network is down"; |
| 79 | break; |
| 80 | case WSAENETUNREACH: |
| 81 | string = "WSAENETUNREACH"; |
| 82 | description = "Network is up, but unreachable"; |
| 83 | break; |
| 84 | case WSAENETRESET: |
| 85 | string = "WSANETRESET"; |
| 86 | description = "Connection has been reset due to keep-alive activity"; |
| 87 | break; |
| 88 | case WSAECONNABORTED: |
| 89 | string = "WSAECONNABORTED"; |
| 90 | description = "Aborted by host"; |
| 91 | break; |
| 92 | case WSAECONNRESET: |
| 93 | string = "WSAECONNRESET"; |
| 94 | description = "Connection reset by host"; |
| 95 | break; |
| 96 | case WSAETIMEDOUT: |
| 97 | string = "WSAETIMEDOUT"; |
| 98 | description = "Timed out, host failed to respond"; |
| 99 | break; |
| 100 | case WSAECONNREFUSED: |
| 101 | string = "WSAECONNREFUSED"; |
| 102 | description = "Host actively refused connection"; |
| 103 | break; |
| 104 | case WSAEHOSTDOWN: |
| 105 | string = "WSAEHOSTDOWN"; |
| 106 | description = "Host is down"; |
| 107 | break; |
| 108 | case WSAEHOSTUNREACH: |
| 109 | string = "WSAEHOSTUNREACH"; |
| 110 | description = "Host is unreachable"; |
| 111 | break; |
| 112 | case WSAHOST_NOT_FOUND: |
| 113 | string = "WSAHOST_NOT_FOUND"; |
| 114 | description = "No such host is known"; |
| 115 | break; |
| 116 | } |
| 117 | if (description_result) { |
| 118 | *description_result = description; |
| 119 | } |
| 120 | return string; |
| 121 | } |
| 122 | |
| 123 | void ReportWSAError(LPCSTR context, int error, const SocketAddress& address) { |
| 124 | LPCSTR description_string; |
| 125 | LPCSTR error_string = WSAErrorToString(error, &description_string); |
| 126 | LOG(LS_INFO) << context << " = " << error |
| 127 | << " (" << error_string << ":" << description_string << ") [" |
| 128 | << address.ToString() << "]"; |
| 129 | } |
| 130 | #else |
| 131 | void ReportWSAError(LPCSTR context, int error, const SocketAddress& address) {} |
| 132 | #endif |
| 133 | |
| 134 | ///////////////////////////////////////////////////////////////////////////// |
| 135 | // Win32Socket::EventSink |
| 136 | ///////////////////////////////////////////////////////////////////////////// |
| 137 | |
| 138 | #define WM_SOCKETNOTIFY (WM_USER + 50) |
| 139 | #define WM_DNSNOTIFY (WM_USER + 51) |
| 140 | |
| 141 | struct Win32Socket::DnsLookup { |
| 142 | HANDLE handle; |
| 143 | uint16 port; |
| 144 | char buffer[MAXGETHOSTSTRUCT]; |
| 145 | }; |
| 146 | |
| 147 | class Win32Socket::EventSink : public Win32Window { |
| 148 | public: |
| 149 | explicit EventSink(Win32Socket * parent) : parent_(parent) { } |
| 150 | |
| 151 | void Dispose(); |
| 152 | |
| 153 | virtual bool OnMessage(UINT uMsg, WPARAM wParam, LPARAM lParam, |
| 154 | LRESULT& result); |
| 155 | virtual void OnNcDestroy(); |
| 156 | |
| 157 | private: |
| 158 | bool OnSocketNotify(UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT& result); |
| 159 | bool OnDnsNotify(WPARAM wParam, LPARAM lParam, LRESULT& result); |
| 160 | |
| 161 | Win32Socket * parent_; |
| 162 | }; |
| 163 | |
| 164 | void Win32Socket::EventSink::Dispose() { |
| 165 | parent_ = NULL; |
| 166 | if (::IsWindow(handle())) { |
| 167 | ::DestroyWindow(handle()); |
| 168 | } else { |
| 169 | delete this; |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | bool Win32Socket::EventSink::OnMessage(UINT uMsg, WPARAM wParam, |
| 174 | LPARAM lParam, LRESULT& result) { |
| 175 | switch (uMsg) { |
| 176 | case WM_SOCKETNOTIFY: |
| 177 | case WM_TIMER: |
| 178 | return OnSocketNotify(uMsg, wParam, lParam, result); |
| 179 | case WM_DNSNOTIFY: |
| 180 | return OnDnsNotify(wParam, lParam, result); |
| 181 | } |
| 182 | return false; |
| 183 | } |
| 184 | |
| 185 | bool Win32Socket::EventSink::OnSocketNotify(UINT uMsg, WPARAM wParam, |
| 186 | LPARAM lParam, LRESULT& result) { |
| 187 | result = 0; |
| 188 | |
| 189 | int wsa_event = WSAGETSELECTEVENT(lParam); |
| 190 | int wsa_error = WSAGETSELECTERROR(lParam); |
| 191 | |
| 192 | // Treat connect timeouts as close notifications |
| 193 | if (uMsg == WM_TIMER) { |
| 194 | wsa_event = FD_CLOSE; |
| 195 | wsa_error = WSAETIMEDOUT; |
| 196 | } |
| 197 | |
| 198 | if (parent_) |
| 199 | parent_->OnSocketNotify(static_cast<SOCKET>(wParam), wsa_event, wsa_error); |
| 200 | return true; |
| 201 | } |
| 202 | |
| 203 | bool Win32Socket::EventSink::OnDnsNotify(WPARAM wParam, LPARAM lParam, |
| 204 | LRESULT& result) { |
| 205 | result = 0; |
| 206 | |
| 207 | int error = WSAGETASYNCERROR(lParam); |
| 208 | if (parent_) |
| 209 | parent_->OnDnsNotify(reinterpret_cast<HANDLE>(wParam), error); |
| 210 | return true; |
| 211 | } |
| 212 | |
| 213 | void Win32Socket::EventSink::OnNcDestroy() { |
| 214 | if (parent_) { |
| 215 | LOG(LS_ERROR) << "EventSink hwnd is being destroyed, but the event sink" |
| 216 | " hasn't yet been disposed."; |
| 217 | } else { |
| 218 | delete this; |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | ///////////////////////////////////////////////////////////////////////////// |
| 223 | // Win32Socket |
| 224 | ///////////////////////////////////////////////////////////////////////////// |
| 225 | |
| 226 | Win32Socket::Win32Socket() |
| 227 | : socket_(INVALID_SOCKET), error_(0), state_(CS_CLOSED), connect_time_(0), |
| 228 | closing_(false), close_error_(0), sink_(NULL), dns_(NULL) { |
| 229 | } |
| 230 | |
| 231 | Win32Socket::~Win32Socket() { |
| 232 | Close(); |
| 233 | } |
| 234 | |
| 235 | bool Win32Socket::CreateT(int family, int type) { |
| 236 | Close(); |
| 237 | int proto = (SOCK_DGRAM == type) ? IPPROTO_UDP : IPPROTO_TCP; |
| 238 | socket_ = ::WSASocket(family, type, proto, NULL, NULL, 0); |
| 239 | if (socket_ == INVALID_SOCKET) { |
| 240 | UpdateLastError(); |
| 241 | return false; |
| 242 | } |
| 243 | if ((SOCK_DGRAM == type) && !SetAsync(FD_READ | FD_WRITE)) { |
| 244 | return false; |
| 245 | } |
| 246 | return true; |
| 247 | } |
| 248 | |
| 249 | int Win32Socket::Attach(SOCKET s) { |
| 250 | ASSERT(socket_ == INVALID_SOCKET); |
| 251 | if (socket_ != INVALID_SOCKET) |
| 252 | return SOCKET_ERROR; |
| 253 | |
| 254 | ASSERT(s != INVALID_SOCKET); |
| 255 | if (s == INVALID_SOCKET) |
| 256 | return SOCKET_ERROR; |
| 257 | |
| 258 | socket_ = s; |
| 259 | state_ = CS_CONNECTED; |
| 260 | |
| 261 | if (!SetAsync(FD_READ | FD_WRITE | FD_CLOSE)) |
| 262 | return SOCKET_ERROR; |
| 263 | |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | void Win32Socket::SetTimeout(int ms) { |
| 268 | if (sink_) |
| 269 | ::SetTimer(sink_->handle(), 1, ms, 0); |
| 270 | } |
| 271 | |
| 272 | SocketAddress Win32Socket::GetLocalAddress() const { |
| 273 | sockaddr_storage addr = {0}; |
| 274 | socklen_t addrlen = sizeof(addr); |
| 275 | int result = ::getsockname(socket_, reinterpret_cast<sockaddr*>(&addr), |
| 276 | &addrlen); |
| 277 | SocketAddress address; |
| 278 | if (result >= 0) { |
| 279 | SocketAddressFromSockAddrStorage(addr, &address); |
| 280 | } else { |
| 281 | LOG(LS_WARNING) << "GetLocalAddress: unable to get local addr, socket=" |
| 282 | << socket_; |
| 283 | } |
| 284 | return address; |
| 285 | } |
| 286 | |
| 287 | SocketAddress Win32Socket::GetRemoteAddress() const { |
| 288 | sockaddr_storage addr = {0}; |
| 289 | socklen_t addrlen = sizeof(addr); |
| 290 | int result = ::getpeername(socket_, reinterpret_cast<sockaddr*>(&addr), |
| 291 | &addrlen); |
| 292 | SocketAddress address; |
| 293 | if (result >= 0) { |
| 294 | SocketAddressFromSockAddrStorage(addr, &address); |
| 295 | } else { |
| 296 | LOG(LS_WARNING) << "GetRemoteAddress: unable to get remote addr, socket=" |
| 297 | << socket_; |
| 298 | } |
| 299 | return address; |
| 300 | } |
| 301 | |
| 302 | int Win32Socket::Bind(const SocketAddress& addr) { |
| 303 | ASSERT(socket_ != INVALID_SOCKET); |
| 304 | if (socket_ == INVALID_SOCKET) |
| 305 | return SOCKET_ERROR; |
| 306 | |
| 307 | sockaddr_storage saddr; |
| 308 | size_t len = addr.ToSockAddrStorage(&saddr); |
| 309 | int err = ::bind(socket_, |
| 310 | reinterpret_cast<sockaddr*>(&saddr), |
| 311 | static_cast<int>(len)); |
| 312 | UpdateLastError(); |
| 313 | return err; |
| 314 | } |
| 315 | |
| 316 | int Win32Socket::Connect(const SocketAddress& addr) { |
| 317 | if (state_ != CS_CLOSED) { |
| 318 | SetError(EALREADY); |
| 319 | return SOCKET_ERROR; |
| 320 | } |
| 321 | |
| 322 | if (!addr.IsUnresolvedIP()) { |
| 323 | return DoConnect(addr); |
| 324 | } |
| 325 | |
| 326 | LOG_F(LS_INFO) << "async dns lookup (" << addr.hostname() << ")"; |
| 327 | DnsLookup * dns = new DnsLookup; |
| 328 | if (!sink_) { |
| 329 | // Explicitly create the sink ourselves here; we can't rely on SetAsync |
| 330 | // because we don't have a socket_ yet. |
| 331 | CreateSink(); |
| 332 | } |
| 333 | // TODO: Replace with IPv6 compatible lookup. |
| 334 | dns->handle = WSAAsyncGetHostByName(sink_->handle(), WM_DNSNOTIFY, |
| 335 | addr.hostname().c_str(), dns->buffer, |
| 336 | sizeof(dns->buffer)); |
| 337 | |
| 338 | if (!dns->handle) { |
| 339 | LOG_F(LS_ERROR) << "WSAAsyncGetHostByName error: " << WSAGetLastError(); |
| 340 | delete dns; |
| 341 | UpdateLastError(); |
| 342 | Close(); |
| 343 | return SOCKET_ERROR; |
| 344 | } |
| 345 | |
| 346 | dns->port = addr.port(); |
| 347 | dns_ = dns; |
| 348 | state_ = CS_CONNECTING; |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | int Win32Socket::DoConnect(const SocketAddress& addr) { |
| 353 | if ((socket_ == INVALID_SOCKET) && !CreateT(addr.family(), SOCK_STREAM)) { |
| 354 | return SOCKET_ERROR; |
| 355 | } |
| 356 | if (!SetAsync(FD_READ | FD_WRITE | FD_CONNECT | FD_CLOSE)) { |
| 357 | return SOCKET_ERROR; |
| 358 | } |
| 359 | |
| 360 | sockaddr_storage saddr = {0}; |
| 361 | size_t len = addr.ToSockAddrStorage(&saddr); |
| 362 | connect_time_ = Time(); |
| 363 | int result = connect(socket_, |
| 364 | reinterpret_cast<SOCKADDR*>(&saddr), |
| 365 | static_cast<int>(len)); |
| 366 | if (result != SOCKET_ERROR) { |
| 367 | state_ = CS_CONNECTED; |
| 368 | } else { |
| 369 | int code = WSAGetLastError(); |
| 370 | if (code == WSAEWOULDBLOCK) { |
| 371 | state_ = CS_CONNECTING; |
| 372 | } else { |
| 373 | ReportWSAError("WSAAsync:connect", code, addr); |
| 374 | error_ = code; |
| 375 | Close(); |
| 376 | return SOCKET_ERROR; |
| 377 | } |
| 378 | } |
| 379 | addr_ = addr; |
| 380 | |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | int Win32Socket::GetError() const { |
| 385 | return error_; |
| 386 | } |
| 387 | |
| 388 | void Win32Socket::SetError(int error) { |
| 389 | error_ = error; |
| 390 | } |
| 391 | |
| 392 | Socket::ConnState Win32Socket::GetState() const { |
| 393 | return state_; |
| 394 | } |
| 395 | |
| 396 | int Win32Socket::GetOption(Option opt, int* value) { |
| 397 | int slevel; |
| 398 | int sopt; |
| 399 | if (TranslateOption(opt, &slevel, &sopt) == -1) |
| 400 | return -1; |
| 401 | |
| 402 | char* p = reinterpret_cast<char*>(value); |
| 403 | int optlen = sizeof(value); |
| 404 | return ::getsockopt(socket_, slevel, sopt, p, &optlen); |
| 405 | } |
| 406 | |
| 407 | int Win32Socket::SetOption(Option opt, int value) { |
| 408 | int slevel; |
| 409 | int sopt; |
| 410 | if (TranslateOption(opt, &slevel, &sopt) == -1) |
| 411 | return -1; |
| 412 | |
| 413 | const char* p = reinterpret_cast<const char*>(&value); |
| 414 | return ::setsockopt(socket_, slevel, sopt, p, sizeof(value)); |
| 415 | } |
| 416 | |
| 417 | int Win32Socket::Send(const void* buffer, size_t length) { |
| 418 | int sent = ::send(socket_, |
| 419 | reinterpret_cast<const char*>(buffer), |
| 420 | static_cast<int>(length), |
| 421 | 0); |
| 422 | UpdateLastError(); |
| 423 | return sent; |
| 424 | } |
| 425 | |
| 426 | int Win32Socket::SendTo(const void* buffer, size_t length, |
| 427 | const SocketAddress& addr) { |
| 428 | sockaddr_storage saddr; |
| 429 | size_t addr_len = addr.ToSockAddrStorage(&saddr); |
| 430 | int sent = ::sendto(socket_, reinterpret_cast<const char*>(buffer), |
| 431 | static_cast<int>(length), 0, |
| 432 | reinterpret_cast<sockaddr*>(&saddr), |
| 433 | static_cast<int>(addr_len)); |
| 434 | UpdateLastError(); |
| 435 | return sent; |
| 436 | } |
| 437 | |
| 438 | int Win32Socket::Recv(void* buffer, size_t length) { |
| 439 | int received = ::recv(socket_, static_cast<char*>(buffer), |
| 440 | static_cast<int>(length), 0); |
| 441 | UpdateLastError(); |
| 442 | if (closing_ && received <= static_cast<int>(length)) |
| 443 | PostClosed(); |
| 444 | return received; |
| 445 | } |
| 446 | |
| 447 | int Win32Socket::RecvFrom(void* buffer, size_t length, |
| 448 | SocketAddress* out_addr) { |
| 449 | sockaddr_storage saddr; |
| 450 | socklen_t addr_len = sizeof(saddr); |
| 451 | int received = ::recvfrom(socket_, static_cast<char*>(buffer), |
| 452 | static_cast<int>(length), 0, |
| 453 | reinterpret_cast<sockaddr*>(&saddr), &addr_len); |
| 454 | UpdateLastError(); |
| 455 | if (received != SOCKET_ERROR) |
| 456 | SocketAddressFromSockAddrStorage(saddr, out_addr); |
| 457 | if (closing_ && received <= static_cast<int>(length)) |
| 458 | PostClosed(); |
| 459 | return received; |
| 460 | } |
| 461 | |
| 462 | int Win32Socket::Listen(int backlog) { |
| 463 | int err = ::listen(socket_, backlog); |
| 464 | if (!SetAsync(FD_ACCEPT)) |
| 465 | return SOCKET_ERROR; |
| 466 | |
| 467 | UpdateLastError(); |
| 468 | if (err == 0) |
| 469 | state_ = CS_CONNECTING; |
| 470 | return err; |
| 471 | } |
| 472 | |
| 473 | Win32Socket* Win32Socket::Accept(SocketAddress* out_addr) { |
| 474 | sockaddr_storage saddr; |
| 475 | socklen_t addr_len = sizeof(saddr); |
| 476 | SOCKET s = ::accept(socket_, reinterpret_cast<sockaddr*>(&saddr), &addr_len); |
| 477 | UpdateLastError(); |
| 478 | if (s == INVALID_SOCKET) |
| 479 | return NULL; |
| 480 | if (out_addr) |
| 481 | SocketAddressFromSockAddrStorage(saddr, out_addr); |
| 482 | Win32Socket* socket = new Win32Socket; |
| 483 | if (0 == socket->Attach(s)) |
| 484 | return socket; |
| 485 | delete socket; |
| 486 | return NULL; |
| 487 | } |
| 488 | |
| 489 | int Win32Socket::Close() { |
| 490 | int err = 0; |
| 491 | if (socket_ != INVALID_SOCKET) { |
| 492 | err = ::closesocket(socket_); |
| 493 | socket_ = INVALID_SOCKET; |
| 494 | closing_ = false; |
| 495 | close_error_ = 0; |
| 496 | UpdateLastError(); |
| 497 | } |
| 498 | if (dns_) { |
| 499 | WSACancelAsyncRequest(dns_->handle); |
| 500 | delete dns_; |
| 501 | dns_ = NULL; |
| 502 | } |
| 503 | if (sink_) { |
| 504 | sink_->Dispose(); |
| 505 | sink_ = NULL; |
| 506 | } |
| 507 | addr_.Clear(); |
| 508 | state_ = CS_CLOSED; |
| 509 | return err; |
| 510 | } |
| 511 | |
| 512 | int Win32Socket::EstimateMTU(uint16* mtu) { |
| 513 | SocketAddress addr = GetRemoteAddress(); |
| 514 | if (addr.IsAny()) { |
| 515 | error_ = ENOTCONN; |
| 516 | return -1; |
| 517 | } |
| 518 | |
| 519 | WinPing ping; |
| 520 | if (!ping.IsValid()) { |
| 521 | error_ = EINVAL; // can't think of a better error ID |
| 522 | return -1; |
| 523 | } |
| 524 | |
| 525 | for (int level = 0; PACKET_MAXIMUMS[level + 1] > 0; ++level) { |
| 526 | int32 size = PACKET_MAXIMUMS[level] - IP_HEADER_SIZE - ICMP_HEADER_SIZE; |
| 527 | WinPing::PingResult result = ping.Ping(addr.ipaddr(), size, |
| 528 | ICMP_PING_TIMEOUT_MILLIS, 1, false); |
| 529 | if (result == WinPing::PING_FAIL) { |
| 530 | error_ = EINVAL; // can't think of a better error ID |
| 531 | return -1; |
| 532 | } |
| 533 | if (result != WinPing::PING_TOO_LARGE) { |
| 534 | *mtu = PACKET_MAXIMUMS[level]; |
| 535 | return 0; |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | ASSERT(false); |
| 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | void Win32Socket::CreateSink() { |
| 544 | ASSERT(NULL == sink_); |
| 545 | |
| 546 | // Create window |
| 547 | sink_ = new EventSink(this); |
| 548 | sink_->Create(NULL, L"EventSink", 0, 0, 0, 0, 10, 10); |
| 549 | } |
| 550 | |
| 551 | bool Win32Socket::SetAsync(int events) { |
| 552 | if (NULL == sink_) { |
| 553 | CreateSink(); |
| 554 | ASSERT(NULL != sink_); |
| 555 | } |
| 556 | |
| 557 | // start the async select |
| 558 | if (WSAAsyncSelect(socket_, sink_->handle(), WM_SOCKETNOTIFY, events) |
| 559 | == SOCKET_ERROR) { |
| 560 | UpdateLastError(); |
| 561 | Close(); |
| 562 | return false; |
| 563 | } |
| 564 | |
| 565 | return true; |
| 566 | } |
| 567 | |
| 568 | bool Win32Socket::HandleClosed(int close_error) { |
| 569 | // WM_CLOSE will be received before all data has been read, so we need to |
| 570 | // hold on to it until the read buffer has been drained. |
| 571 | char ch; |
| 572 | closing_ = true; |
| 573 | close_error_ = close_error; |
| 574 | return (::recv(socket_, &ch, 1, MSG_PEEK) <= 0); |
| 575 | } |
| 576 | |
| 577 | void Win32Socket::PostClosed() { |
| 578 | // If we see that the buffer is indeed drained, then send the close. |
| 579 | closing_ = false; |
| 580 | ::PostMessage(sink_->handle(), WM_SOCKETNOTIFY, |
| 581 | socket_, WSAMAKESELECTREPLY(FD_CLOSE, close_error_)); |
| 582 | } |
| 583 | |
| 584 | void Win32Socket::UpdateLastError() { |
| 585 | error_ = WSAGetLastError(); |
| 586 | } |
| 587 | |
| 588 | int Win32Socket::TranslateOption(Option opt, int* slevel, int* sopt) { |
| 589 | switch (opt) { |
| 590 | case OPT_DONTFRAGMENT: |
| 591 | *slevel = IPPROTO_IP; |
| 592 | *sopt = IP_DONTFRAGMENT; |
| 593 | break; |
| 594 | case OPT_RCVBUF: |
| 595 | *slevel = SOL_SOCKET; |
| 596 | *sopt = SO_RCVBUF; |
| 597 | break; |
| 598 | case OPT_SNDBUF: |
| 599 | *slevel = SOL_SOCKET; |
| 600 | *sopt = SO_SNDBUF; |
| 601 | break; |
| 602 | case OPT_NODELAY: |
| 603 | *slevel = IPPROTO_TCP; |
| 604 | *sopt = TCP_NODELAY; |
| 605 | break; |
| 606 | case OPT_DSCP: |
| 607 | LOG(LS_WARNING) << "Socket::OPT_DSCP not supported."; |
| 608 | return -1; |
| 609 | default: |
| 610 | ASSERT(false); |
| 611 | return -1; |
| 612 | } |
| 613 | return 0; |
| 614 | } |
| 615 | |
| 616 | void Win32Socket::OnSocketNotify(SOCKET socket, int event, int error) { |
| 617 | // Ignore events if we're already closed. |
| 618 | if (socket != socket_) |
| 619 | return; |
| 620 | |
| 621 | error_ = error; |
| 622 | switch (event) { |
| 623 | case FD_CONNECT: |
| 624 | if (error != ERROR_SUCCESS) { |
| 625 | ReportWSAError("WSAAsync:connect notify", error, addr_); |
| 626 | #ifdef _DEBUG |
| 627 | int32 duration = TimeSince(connect_time_); |
| 628 | LOG(LS_INFO) << "WSAAsync:connect error (" << duration |
| 629 | << " ms), faking close"; |
| 630 | #endif |
| 631 | state_ = CS_CLOSED; |
| 632 | // If you get an error connecting, close doesn't really do anything |
| 633 | // and it certainly doesn't send back any close notification, but |
| 634 | // we really only maintain a few states, so it is easiest to get |
| 635 | // back into a known state by pretending that a close happened, even |
| 636 | // though the connect event never did occur. |
| 637 | SignalCloseEvent(this, error); |
| 638 | } else { |
| 639 | #ifdef _DEBUG |
| 640 | int32 duration = TimeSince(connect_time_); |
| 641 | LOG(LS_INFO) << "WSAAsync:connect (" << duration << " ms)"; |
| 642 | #endif |
| 643 | state_ = CS_CONNECTED; |
| 644 | SignalConnectEvent(this); |
| 645 | } |
| 646 | break; |
| 647 | |
| 648 | case FD_ACCEPT: |
| 649 | case FD_READ: |
| 650 | if (error != ERROR_SUCCESS) { |
| 651 | ReportWSAError("WSAAsync:read notify", error, addr_); |
| 652 | } else { |
| 653 | SignalReadEvent(this); |
| 654 | } |
| 655 | break; |
| 656 | |
| 657 | case FD_WRITE: |
| 658 | if (error != ERROR_SUCCESS) { |
| 659 | ReportWSAError("WSAAsync:write notify", error, addr_); |
| 660 | } else { |
| 661 | SignalWriteEvent(this); |
| 662 | } |
| 663 | break; |
| 664 | |
| 665 | case FD_CLOSE: |
| 666 | if (HandleClosed(error)) { |
| 667 | ReportWSAError("WSAAsync:close notify", error, addr_); |
| 668 | state_ = CS_CLOSED; |
| 669 | SignalCloseEvent(this, error); |
| 670 | } |
| 671 | break; |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | void Win32Socket::OnDnsNotify(HANDLE task, int error) { |
| 676 | if (!dns_ || dns_->handle != task) |
| 677 | return; |
| 678 | |
| 679 | uint32 ip = 0; |
| 680 | if (error == 0) { |
| 681 | hostent* pHost = reinterpret_cast<hostent*>(dns_->buffer); |
| 682 | uint32 net_ip = *reinterpret_cast<uint32*>(pHost->h_addr_list[0]); |
| 683 | ip = NetworkToHost32(net_ip); |
| 684 | } |
| 685 | |
| 686 | LOG_F(LS_INFO) << "(" << IPAddress(ip).ToSensitiveString() |
| 687 | << ", " << error << ")"; |
| 688 | |
| 689 | if (error == 0) { |
| 690 | SocketAddress address(ip, dns_->port); |
| 691 | error = DoConnect(address); |
| 692 | } else { |
| 693 | Close(); |
| 694 | } |
| 695 | |
| 696 | if (error) { |
| 697 | error_ = error; |
| 698 | SignalCloseEvent(this, error_); |
| 699 | } else { |
| 700 | delete dns_; |
| 701 | dns_ = NULL; |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | /////////////////////////////////////////////////////////////////////////////// |
| 706 | // Win32SocketServer |
| 707 | // Provides cricket base services on top of a win32 gui thread |
| 708 | /////////////////////////////////////////////////////////////////////////////// |
| 709 | |
| 710 | static UINT s_wm_wakeup_id = 0; |
| 711 | const TCHAR Win32SocketServer::kWindowName[] = L"libjingle Message Window"; |
| 712 | |
| 713 | Win32SocketServer::Win32SocketServer(MessageQueue* message_queue) |
| 714 | : message_queue_(message_queue), |
| 715 | wnd_(this), |
| 716 | posted_(false), |
| 717 | hdlg_(NULL) { |
| 718 | if (s_wm_wakeup_id == 0) |
| 719 | s_wm_wakeup_id = RegisterWindowMessage(L"WM_WAKEUP"); |
| 720 | if (!wnd_.Create(NULL, kWindowName, 0, 0, 0, 0, 0, 0)) { |
| 721 | LOG_GLE(LS_ERROR) << "Failed to create message window."; |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | Win32SocketServer::~Win32SocketServer() { |
| 726 | if (wnd_.handle() != NULL) { |
| 727 | KillTimer(wnd_.handle(), 1); |
| 728 | wnd_.Destroy(); |
| 729 | } |
| 730 | } |
| 731 | |
| 732 | Socket* Win32SocketServer::CreateSocket(int type) { |
| 733 | return CreateSocket(AF_INET, type); |
| 734 | } |
| 735 | |
| 736 | Socket* Win32SocketServer::CreateSocket(int family, int type) { |
| 737 | return CreateAsyncSocket(family, type); |
| 738 | } |
| 739 | |
| 740 | AsyncSocket* Win32SocketServer::CreateAsyncSocket(int type) { |
| 741 | return CreateAsyncSocket(AF_INET, type); |
| 742 | } |
| 743 | |
| 744 | AsyncSocket* Win32SocketServer::CreateAsyncSocket(int family, int type) { |
| 745 | Win32Socket* socket = new Win32Socket; |
| 746 | if (socket->CreateT(family, type)) { |
| 747 | return socket; |
| 748 | } |
| 749 | delete socket; |
| 750 | return NULL; |
| 751 | } |
| 752 | |
| 753 | void Win32SocketServer::SetMessageQueue(MessageQueue* queue) { |
| 754 | message_queue_ = queue; |
| 755 | } |
| 756 | |
| 757 | bool Win32SocketServer::Wait(int cms, bool process_io) { |
| 758 | BOOL b; |
| 759 | if (process_io) { |
| 760 | // Spin the Win32 message pump at least once, and as long as requested. |
| 761 | // This is the Thread::ProcessMessages case. |
| 762 | uint32 start = Time(); |
| 763 | do { |
| 764 | MSG msg; |
| 765 | SetTimer(wnd_.handle(), 0, cms, NULL); |
| 766 | // Get the next available message. If we have a modeless dialog, give |
| 767 | // give the message to IsDialogMessage, which will return true if it |
| 768 | // was a message for the dialog that it handled internally. |
| 769 | // Otherwise, dispatch as usual via Translate/DispatchMessage. |
| 770 | b = GetMessage(&msg, NULL, 0, 0); |
| 771 | if (b == -1) { |
| 772 | LOG_GLE(LS_ERROR) << "GetMessage failed."; |
| 773 | return false; |
| 774 | } else if(b) { |
| 775 | if (!hdlg_ || !IsDialogMessage(hdlg_, &msg)) { |
| 776 | TranslateMessage(&msg); |
| 777 | DispatchMessage(&msg); |
| 778 | } |
| 779 | } |
| 780 | KillTimer(wnd_.handle(), 0); |
| 781 | } while (b && TimeSince(start) < cms); |
| 782 | } else if (cms != 0) { |
| 783 | // Sit and wait forever for a WakeUp. This is the Thread::Send case. |
| 784 | ASSERT(cms == -1); |
| 785 | MSG msg; |
| 786 | b = GetMessage(&msg, NULL, s_wm_wakeup_id, s_wm_wakeup_id); |
| 787 | { |
| 788 | CritScope scope(&cs_); |
| 789 | posted_ = false; |
| 790 | } |
| 791 | } else { |
| 792 | // No-op (cms == 0 && !process_io). This is the Pump case. |
| 793 | b = TRUE; |
| 794 | } |
| 795 | return (b != FALSE); |
| 796 | } |
| 797 | |
| 798 | void Win32SocketServer::WakeUp() { |
| 799 | if (wnd_.handle()) { |
| 800 | // Set the "message pending" flag, if not already set. |
| 801 | { |
| 802 | CritScope scope(&cs_); |
| 803 | if (posted_) |
| 804 | return; |
| 805 | posted_ = true; |
| 806 | } |
| 807 | |
| 808 | PostMessage(wnd_.handle(), s_wm_wakeup_id, 0, 0); |
| 809 | } |
| 810 | } |
| 811 | |
| 812 | void Win32SocketServer::Pump() { |
| 813 | // Clear the "message pending" flag. |
| 814 | { |
| 815 | CritScope scope(&cs_); |
| 816 | posted_ = false; |
| 817 | } |
| 818 | |
| 819 | // Dispatch all the messages that are currently in our queue. If new messages |
| 820 | // are posted during the dispatch, they will be handled in the next Pump. |
| 821 | // We use max(1, ...) to make sure we try to dispatch at least once, since |
| 822 | // this allow us to process "sent" messages, not included in the size() count. |
| 823 | Message msg; |
| 824 | for (size_t max_messages_to_process = _max<size_t>(1, message_queue_->size()); |
| 825 | max_messages_to_process > 0 && message_queue_->Get(&msg, 0, false); |
| 826 | --max_messages_to_process) { |
| 827 | message_queue_->Dispatch(&msg); |
| 828 | } |
| 829 | |
| 830 | // Anything remaining? |
| 831 | int delay = message_queue_->GetDelay(); |
| 832 | if (delay == -1) { |
| 833 | KillTimer(wnd_.handle(), 1); |
| 834 | } else { |
| 835 | SetTimer(wnd_.handle(), 1, delay, NULL); |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | bool Win32SocketServer::MessageWindow::OnMessage(UINT wm, WPARAM wp, |
| 840 | LPARAM lp, LRESULT& lr) { |
| 841 | bool handled = false; |
| 842 | if (wm == s_wm_wakeup_id || (wm == WM_TIMER && wp == 1)) { |
| 843 | ss_->Pump(); |
| 844 | lr = 0; |
| 845 | handled = true; |
| 846 | } |
| 847 | return handled; |
| 848 | } |
| 849 | |
| 850 | } // namespace rtc |