1 /* 2 * libjingle 3 * Copyright 2004--2005, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "talk/base/win32socketserver.h" 29 #include "talk/base/byteorder.h" 30 #include "talk/base/common.h" 31 #include "talk/base/logging.h" 32 #include "talk/base/winping.h" 33 #include "talk/base/win32window.h" 34 #include <ws2tcpip.h> // NOLINT 35 36 namespace talk_base { 37 38 /////////////////////////////////////////////////////////////////////////////// 39 // Win32Socket 40 /////////////////////////////////////////////////////////////////////////////// 41 42 // TODO: Move this to a common place where PhysicalSocketServer can 43 // share it. 44 // Standard MTUs 45 static const uint16 PACKET_MAXIMUMS[] = { 46 65535, // Theoretical maximum, Hyperchannel 47 32000, // Nothing 48 17914, // 16Mb IBM Token Ring 49 8166, // IEEE 802.4 50 // 4464 // IEEE 802.5 (4Mb max) 51 4352, // FDDI 52 // 2048, // Wideband Network 53 2002, // IEEE 802.5 (4Mb recommended) 54 // 1536, // Expermental Ethernet Networks 55 // 1500, // Ethernet, Point-to-Point (default) 56 1492, // IEEE 802.3 57 1006, // SLIP, ARPANET 58 // 576, // X.25 Networks 59 // 544, // DEC IP Portal 60 // 512, // NETBIOS 61 508, // IEEE 802/Source-Rt Bridge, ARCNET 62 296, // Point-to-Point (low delay) 63 68, // Official minimum 64 0, // End of list marker 65 }; 66 67 static const uint32 IP_HEADER_SIZE = 20; 68 static const uint32 ICMP_HEADER_SIZE = 8; 69 70 // TODO: Enable for production builds also? Use FormatMessage? 71 #ifdef _DEBUG 72 LPCSTR WSAErrorToString(int error, LPCSTR *description_result) { 73 LPCSTR string = "Unspecified"; 74 LPCSTR description = "Unspecified description"; 75 switch (error) { 76 case ERROR_SUCCESS: 77 string = "SUCCESS"; 78 description = "Operation succeeded"; 79 break; 80 case WSAEWOULDBLOCK: 81 string = "WSAEWOULDBLOCK"; 82 description = "Using a non-blocking socket, will notify later"; 83 break; 84 case WSAEACCES: 85 string = "WSAEACCES"; 86 description = "Access denied, or sharing violation"; 87 break; 88 case WSAEADDRNOTAVAIL: 89 string = "WSAEADDRNOTAVAIL"; 90 description = "Address is not valid in this context"; 91 break; 92 case WSAENETDOWN: 93 string = "WSAENETDOWN"; 94 description = "Network is down"; 95 break; 96 case WSAENETUNREACH: 97 string = "WSAENETUNREACH"; 98 description = "Network is up, but unreachable"; 99 break; 100 case WSAENETRESET: 101 string = "WSANETRESET"; 102 description = "Connection has been reset due to keep-alive activity"; 103 break; 104 case WSAECONNABORTED: 105 string = "WSAECONNABORTED"; 106 description = "Aborted by host"; 107 break; 108 case WSAECONNRESET: 109 string = "WSAECONNRESET"; 110 description = "Connection reset by host"; 111 break; 112 case WSAETIMEDOUT: 113 string = "WSAETIMEDOUT"; 114 description = "Timed out, host failed to respond"; 115 break; 116 case WSAECONNREFUSED: 117 string = "WSAECONNREFUSED"; 118 description = "Host actively refused connection"; 119 break; 120 case WSAEHOSTDOWN: 121 string = "WSAEHOSTDOWN"; 122 description = "Host is down"; 123 break; 124 case WSAEHOSTUNREACH: 125 string = "WSAEHOSTUNREACH"; 126 description = "Host is unreachable"; 127 break; 128 case WSAHOST_NOT_FOUND: 129 string = "WSAHOST_NOT_FOUND"; 130 description = "No such host is known"; 131 break; 132 } 133 if (description_result) { 134 *description_result = description; 135 } 136 return string; 137 } 138 139 void ReportWSAError(LPCSTR context, int error, const SocketAddress& address) { 140 LPCSTR description_string; 141 LPCSTR error_string = WSAErrorToString(error, &description_string); 142 LOG(LS_INFO) << context << " = " << error 143 << " (" << error_string << ":" << description_string << ") [" 144 << address.ToString() << "]"; 145 } 146 #else 147 void ReportWSAError(LPCSTR context, int error, const SocketAddress& address) {} 148 #endif 149 150 ///////////////////////////////////////////////////////////////////////////// 151 // Win32Socket::EventSink 152 ///////////////////////////////////////////////////////////////////////////// 153 154 #define WM_SOCKETNOTIFY (WM_USER + 50) 155 #define WM_DNSNOTIFY (WM_USER + 51) 156 157 struct Win32Socket::DnsLookup { 158 HANDLE handle; 159 uint16 port; 160 char buffer[MAXGETHOSTSTRUCT]; 161 }; 162 163 class Win32Socket::EventSink : public Win32Window { 164 public: 165 explicit EventSink(Win32Socket * parent) : parent_(parent) { } 166 167 void Dispose(); 168 169 virtual bool OnMessage(UINT uMsg, WPARAM wParam, LPARAM lParam, 170 LRESULT& result); 171 virtual void OnFinalMessage(HWND hWnd); 172 173 private: 174 bool OnSocketNotify(UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT& result); 175 bool OnDnsNotify(WPARAM wParam, LPARAM lParam, LRESULT& result); 176 177 Win32Socket * parent_; 178 }; 179 180 void Win32Socket::EventSink::Dispose() { 181 parent_ = NULL; 182 if (::IsWindow(handle())) { 183 ::DestroyWindow(handle()); 184 } else { 185 delete this; 186 } 187 } 188 189 bool Win32Socket::EventSink::OnMessage(UINT uMsg, WPARAM wParam, 190 LPARAM lParam, LRESULT& result) { 191 switch (uMsg) { 192 case WM_SOCKETNOTIFY: 193 case WM_TIMER: 194 return OnSocketNotify(uMsg, wParam, lParam, result); 195 case WM_DNSNOTIFY: 196 return OnDnsNotify(wParam, lParam, result); 197 } 198 return false; 199 } 200 201 bool Win32Socket::EventSink::OnSocketNotify(UINT uMsg, WPARAM wParam, 202 LPARAM lParam, LRESULT& result) { 203 result = 0; 204 205 int wsa_event = WSAGETSELECTEVENT(lParam); 206 int wsa_error = WSAGETSELECTERROR(lParam); 207 208 // Treat connect timeouts as close notifications 209 if (uMsg == WM_TIMER) { 210 wsa_event = FD_CLOSE; 211 wsa_error = WSAETIMEDOUT; 212 } 213 214 if (parent_) 215 parent_->OnSocketNotify(static_cast<SOCKET>(wParam), wsa_event, wsa_error); 216 return true; 217 } 218 219 bool Win32Socket::EventSink::OnDnsNotify(WPARAM wParam, LPARAM lParam, 220 LRESULT& result) { 221 result = 0; 222 223 int error = WSAGETASYNCERROR(lParam); 224 if (parent_) 225 parent_->OnDnsNotify(reinterpret_cast<HANDLE>(wParam), error); 226 return true; 227 } 228 229 void Win32Socket::EventSink::OnFinalMessage(HWND hWnd) { 230 delete this; 231 } 232 233 ///////////////////////////////////////////////////////////////////////////// 234 // Win32Socket 235 ///////////////////////////////////////////////////////////////////////////// 236 237 Win32Socket::Win32Socket() 238 : socket_(INVALID_SOCKET), error_(0), state_(CS_CLOSED), connect_time_(0), 239 closing_(false), close_error_(0), sink_(NULL), dns_(NULL) { 240 } 241 242 Win32Socket::~Win32Socket() { 243 Close(); 244 } 245 246 bool Win32Socket::CreateT(int type) { 247 Close(); 248 int proto = (SOCK_DGRAM == type) ? IPPROTO_UDP : IPPROTO_TCP; 249 socket_ = ::WSASocket(AF_INET, type, proto, NULL, NULL, 0); 250 if (socket_ == INVALID_SOCKET) { 251 UpdateLastError(); 252 return false; 253 } 254 if ((SOCK_DGRAM == type) && !SetAsync(FD_READ | FD_WRITE)) { 255 return false; 256 } 257 return true; 258 } 259 260 int Win32Socket::Attach(SOCKET s) { 261 ASSERT(socket_ == INVALID_SOCKET); 262 if (socket_ != INVALID_SOCKET) 263 return SOCKET_ERROR; 264 265 ASSERT(s != INVALID_SOCKET); 266 if (s == INVALID_SOCKET) 267 return SOCKET_ERROR; 268 269 socket_ = s; 270 state_ = CS_CONNECTED; 271 272 if (!SetAsync(FD_READ | FD_WRITE | FD_CLOSE)) 273 return SOCKET_ERROR; 274 275 return 0; 276 } 277 278 void Win32Socket::SetTimeout(int ms) { 279 if (sink_) 280 ::SetTimer(sink_->handle(), 1, ms, 0); 281 } 282 283 SocketAddress Win32Socket::GetLocalAddress() const { 284 sockaddr_in addr; 285 socklen_t addrlen = sizeof(addr); 286 int result = ::getsockname(socket_, reinterpret_cast<sockaddr*>(&addr), 287 &addrlen); 288 SocketAddress address; 289 if (result >= 0) { 290 ASSERT(addrlen == sizeof(addr)); 291 address.FromSockAddr(addr); 292 } else { 293 LOG(LS_WARNING) << "GetLocalAddress: unable to get local addr, socket=" 294 << socket_; 295 } 296 return address; 297 } 298 299 SocketAddress Win32Socket::GetRemoteAddress() const { 300 sockaddr_in addr; 301 socklen_t addrlen = sizeof(addr); 302 int result = ::getpeername(socket_, reinterpret_cast<sockaddr*>(&addr), 303 &addrlen); 304 ASSERT(addrlen == sizeof(addr)); 305 SocketAddress address; 306 if (result >= 0) { 307 ASSERT(addrlen == sizeof(addr)); 308 address.FromSockAddr(addr); 309 } else { 310 LOG(LS_WARNING) << "GetRemoteAddress: unable to get remote addr, socket=" 311 << socket_; 312 } 313 return address; 314 } 315 316 int Win32Socket::Bind(const SocketAddress& addr) { 317 ASSERT(socket_ != INVALID_SOCKET); 318 if (socket_ == INVALID_SOCKET) 319 return SOCKET_ERROR; 320 321 sockaddr_in saddr; 322 addr.ToSockAddr(&saddr); 323 int err = ::bind(socket_, reinterpret_cast<sockaddr*>(&saddr), sizeof(saddr)); 324 UpdateLastError(); 325 return err; 326 } 327 328 int Win32Socket::Connect(const SocketAddress& addr) { 329 if ((socket_ == INVALID_SOCKET) && !CreateT(SOCK_STREAM)) 330 return SOCKET_ERROR; 331 332 if (!sink_ && !SetAsync(FD_READ | FD_WRITE | FD_CONNECT | FD_CLOSE)) 333 return SOCKET_ERROR; 334 335 // If we have an IP address, connect now. 336 if (!addr.IsUnresolved()) { 337 return DoConnect(addr); 338 } 339 340 LOG_F(LS_INFO) << "async dns lookup (" << addr.IPAsString() << ")"; 341 DnsLookup * dns = new DnsLookup; 342 dns->handle = WSAAsyncGetHostByName(sink_->handle(), WM_DNSNOTIFY, 343 addr.IPAsString().c_str(), dns->buffer, sizeof(dns->buffer)); 344 345 if (!dns->handle) { 346 LOG_F(LS_ERROR) << "WSAAsyncGetHostByName error: " << WSAGetLastError(); 347 delete dns; 348 UpdateLastError(); 349 Close(); 350 return SOCKET_ERROR; 351 } 352 353 dns->port = addr.port(); 354 dns_ = dns; 355 state_ = CS_CONNECTING; 356 return 0; 357 } 358 359 int Win32Socket::DoConnect(const SocketAddress& addr) { 360 sockaddr_in saddr; 361 addr.ToSockAddr(&saddr); 362 connect_time_ = Time(); 363 int result = connect(socket_, reinterpret_cast<SOCKADDR*>(&saddr), 364 sizeof(saddr)); 365 if (result != SOCKET_ERROR) { 366 state_ = CS_CONNECTED; 367 } else { 368 int code = WSAGetLastError(); 369 if (code == WSAEWOULDBLOCK) { 370 state_ = CS_CONNECTING; 371 } else { 372 ReportWSAError("WSAAsync:connect", code, addr); 373 error_ = code; 374 Close(); 375 return SOCKET_ERROR; 376 } 377 } 378 addr_ = addr; 379 380 return 0; 381 } 382 383 int Win32Socket::GetError() const { 384 return error_; 385 } 386 387 void Win32Socket::SetError(int error) { 388 error_ = error; 389 } 390 391 Socket::ConnState Win32Socket::GetState() const { 392 return state_; 393 } 394 395 int Win32Socket::GetOption(Option opt, int* value) { 396 int slevel; 397 int sopt; 398 if (TranslateOption(opt, &slevel, &sopt) == -1) 399 return -1; 400 401 char* p = reinterpret_cast<char*>(value); 402 int optlen = sizeof(value); 403 return ::getsockopt(socket_, slevel, sopt, p, &optlen); 404 } 405 406 int Win32Socket::SetOption(Option opt, int value) { 407 int slevel; 408 int sopt; 409 if (TranslateOption(opt, &slevel, &sopt) == -1) 410 return -1; 411 412 const char* p = reinterpret_cast<const char*>(&value); 413 return ::setsockopt(socket_, slevel, sopt, p, sizeof(value)); 414 } 415 416 int Win32Socket::Send(const void *pv, size_t cb) { 417 int sent = ::send(socket_, reinterpret_cast<const char*>(pv), cb, 0); 418 UpdateLastError(); 419 return sent; 420 } 421 422 int Win32Socket::SendTo(const void *pv, size_t cb, 423 const SocketAddress& addr) { 424 sockaddr_in saddr; 425 addr.ToSockAddr(&saddr); 426 int sent = ::sendto(socket_, reinterpret_cast<const char*>(pv), cb, 0, 427 reinterpret_cast<sockaddr*>(&saddr), sizeof(saddr)); 428 UpdateLastError(); 429 return sent; 430 } 431 432 int Win32Socket::Recv(void *pv, size_t cb) { 433 int received = ::recv(socket_, static_cast<char*>(pv), cb, 0); 434 UpdateLastError(); 435 if (closing_ && received <= static_cast<int>(cb)) 436 PostClosed(); 437 return received; 438 } 439 440 int Win32Socket::RecvFrom(void *pv, size_t cb, 441 SocketAddress *paddr) { 442 sockaddr_in saddr; 443 socklen_t cbAddr = sizeof(saddr); 444 int received = ::recvfrom(socket_, static_cast<char*>(pv), cb, 0, 445 reinterpret_cast<sockaddr*>(&saddr), &cbAddr); 446 UpdateLastError(); 447 if (received != SOCKET_ERROR) 448 paddr->FromSockAddr(saddr); 449 if (closing_ && received <= static_cast<int>(cb)) 450 PostClosed(); 451 return received; 452 } 453 454 int Win32Socket::Listen(int backlog) { 455 int err = ::listen(socket_, backlog); 456 if (!SetAsync(FD_ACCEPT)) 457 return SOCKET_ERROR; 458 459 UpdateLastError(); 460 if (err == 0) 461 state_ = CS_CONNECTING; 462 return err; 463 } 464 465 Win32Socket* Win32Socket::Accept(SocketAddress *paddr) { 466 sockaddr_in saddr; 467 socklen_t cbAddr = sizeof(saddr); 468 SOCKET s = ::accept(socket_, reinterpret_cast<sockaddr*>(&saddr), &cbAddr); 469 UpdateLastError(); 470 if (s == INVALID_SOCKET) 471 return NULL; 472 if (paddr) 473 paddr->FromSockAddr(saddr); 474 Win32Socket* socket = new Win32Socket; 475 if (0 == socket->Attach(s)) 476 return socket; 477 delete socket; 478 return NULL; 479 } 480 481 int Win32Socket::Close() { 482 int err = 0; 483 if (socket_ != INVALID_SOCKET) { 484 err = ::closesocket(socket_); 485 socket_ = INVALID_SOCKET; 486 closing_ = false; 487 close_error_ = 0; 488 UpdateLastError(); 489 } 490 if (dns_) { 491 WSACancelAsyncRequest(dns_->handle); 492 delete dns_; 493 dns_ = NULL; 494 } 495 if (sink_) { 496 sink_->Dispose(); 497 sink_ = NULL; 498 } 499 addr_.Clear(); 500 state_ = CS_CLOSED; 501 return err; 502 } 503 504 int Win32Socket::EstimateMTU(uint16* mtu) { 505 SocketAddress addr = GetRemoteAddress(); 506 if (addr.IsAny()) { 507 error_ = ENOTCONN; 508 return -1; 509 } 510 511 WinPing ping; 512 if (!ping.IsValid()) { 513 error_ = EINVAL; // can't think of a better error ID 514 return -1; 515 } 516 517 for (int level = 0; PACKET_MAXIMUMS[level + 1] > 0; ++level) { 518 int32 size = PACKET_MAXIMUMS[level] - IP_HEADER_SIZE - ICMP_HEADER_SIZE; 519 WinPing::PingResult result = ping.Ping(addr.ip(), size, 0, 1, false); 520 if (result == WinPing::PING_FAIL) { 521 error_ = EINVAL; // can't think of a better error ID 522 return -1; 523 } 524 if (result != WinPing::PING_TOO_LARGE) { 525 *mtu = PACKET_MAXIMUMS[level]; 526 return 0; 527 } 528 } 529 530 ASSERT(false); 531 return 0; 532 } 533 534 bool Win32Socket::SetAsync(int events) { 535 ASSERT(NULL == sink_); 536 537 // Create window 538 sink_ = new EventSink(this); 539 sink_->Create(NULL, L"EventSink", 0, 0, 0, 0, 10, 10); 540 541 // start the async select 542 if (WSAAsyncSelect(socket_, sink_->handle(), WM_SOCKETNOTIFY, events) 543 == SOCKET_ERROR) { 544 UpdateLastError(); 545 Close(); 546 return false; 547 } 548 549 return true; 550 } 551 552 bool Win32Socket::HandleClosed(int close_error) { 553 // WM_CLOSE will be received before all data has been read, so we need to 554 // hold on to it until the read buffer has been drained. 555 char ch; 556 closing_ = true; 557 close_error_ = close_error; 558 return (::recv(socket_, &ch, 1, MSG_PEEK) <= 0); 559 } 560 561 void Win32Socket::PostClosed() { 562 // If we see that the buffer is indeed drained, then send the close. 563 closing_ = false; 564 ::PostMessage(sink_->handle(), WM_SOCKETNOTIFY, 565 socket_, WSAMAKESELECTREPLY(FD_CLOSE, close_error_)); 566 } 567 568 void Win32Socket::UpdateLastError() { 569 error_ = WSAGetLastError(); 570 } 571 572 int Win32Socket::TranslateOption(Option opt, int* slevel, int* sopt) { 573 switch (opt) { 574 case OPT_DONTFRAGMENT: 575 *slevel = IPPROTO_IP; 576 *sopt = IP_DONTFRAGMENT; 577 break; 578 case OPT_RCVBUF: 579 *slevel = SOL_SOCKET; 580 *sopt = SO_RCVBUF; 581 break; 582 case OPT_SNDBUF: 583 *slevel = SOL_SOCKET; 584 *sopt = SO_SNDBUF; 585 break; 586 case OPT_NODELAY: 587 *slevel = IPPROTO_TCP; 588 *sopt = TCP_NODELAY; 589 break; 590 default: 591 ASSERT(false); 592 return -1; 593 } 594 return 0; 595 } 596 597 void Win32Socket::OnSocketNotify(SOCKET socket, int event, int error) { 598 // Ignore events if we're already closed. 599 if (socket != socket_) 600 return; 601 602 error_ = error; 603 switch (event) { 604 case FD_CONNECT: 605 if (error != ERROR_SUCCESS) { 606 ReportWSAError("WSAAsync:connect notify", error, addr_); 607 #ifdef _DEBUG 608 int32 duration = TimeSince(connect_time_); 609 LOG(LS_INFO) << "WSAAsync:connect error (" << duration 610 << " ms), faking close"; 611 #endif 612 state_ = CS_CLOSED; 613 // If you get an error connecting, close doesn't really do anything 614 // and it certainly doesn't send back any close notification, but 615 // we really only maintain a few states, so it is easiest to get 616 // back into a known state by pretending that a close happened, even 617 // though the connect event never did occur. 618 SignalCloseEvent(this, error); 619 } else { 620 #ifdef _DEBUG 621 int32 duration = TimeSince(connect_time_); 622 LOG(LS_INFO) << "WSAAsync:connect (" << duration << " ms)"; 623 #endif 624 state_ = CS_CONNECTED; 625 SignalConnectEvent(this); 626 } 627 break; 628 629 case FD_ACCEPT: 630 case FD_READ: 631 if (error != ERROR_SUCCESS) { 632 ReportWSAError("WSAAsync:read notify", error, addr_); 633 } else { 634 SignalReadEvent(this); 635 } 636 break; 637 638 case FD_WRITE: 639 if (error != ERROR_SUCCESS) { 640 ReportWSAError("WSAAsync:write notify", error, addr_); 641 } else { 642 SignalWriteEvent(this); 643 } 644 break; 645 646 case FD_CLOSE: 647 if (HandleClosed(error)) { 648 ReportWSAError("WSAAsync:close notify", error, addr_); 649 state_ = CS_CLOSED; 650 SignalCloseEvent(this, error); 651 } 652 break; 653 } 654 } 655 656 void Win32Socket::OnDnsNotify(HANDLE task, int error) { 657 if (!dns_ || dns_->handle != task) 658 return; 659 660 uint32 ip = 0; 661 if (error == 0) { 662 hostent* pHost = reinterpret_cast<hostent*>(dns_->buffer); 663 uint32 net_ip = *reinterpret_cast<uint32*>(pHost->h_addr_list[0]); 664 ip = NetworkToHost32(net_ip); 665 } 666 667 LOG_F(LS_INFO) << "(" << SocketAddress::IPToString(ip) 668 << ", " << error << ")"; 669 670 if (error == 0) { 671 SocketAddress address(ip, dns_->port); 672 error = DoConnect(address); 673 } else { 674 Close(); 675 } 676 677 if (error) { 678 error_ = error; 679 SignalCloseEvent(this, error_); 680 } else { 681 delete dns_; 682 dns_ = NULL; 683 } 684 } 685 686 /////////////////////////////////////////////////////////////////////////////// 687 // Win32SocketServer 688 // Provides cricket base services on top of a win32 gui thread 689 /////////////////////////////////////////////////////////////////////////////// 690 691 static UINT s_wm_wakeup_id = 0; 692 const TCHAR Win32SocketServer::kWindowName[] = L"libjingle Message Window"; 693 694 Win32SocketServer::Win32SocketServer(MessageQueue *message_queue) 695 : message_queue_(message_queue), wnd_(this), posted_(false) { 696 if (s_wm_wakeup_id == 0) 697 s_wm_wakeup_id = RegisterWindowMessage(L"WM_WAKEUP"); 698 if (!wnd_.Create(NULL, kWindowName, 0, 0, 0, 0, 0, 0)) { 699 LOG_GLE(LS_ERROR) << "Failed to create message window."; 700 } 701 } 702 703 Win32SocketServer::~Win32SocketServer() { 704 if (wnd_.handle() != NULL) { 705 KillTimer(wnd_.handle(), 1); 706 wnd_.Destroy(); 707 } 708 } 709 710 Socket* Win32SocketServer::CreateSocket(int type) { 711 return CreateAsyncSocket(type); 712 } 713 714 AsyncSocket* Win32SocketServer::CreateAsyncSocket(int type) { 715 Win32Socket* socket = new Win32Socket; 716 if (socket->CreateT(type)) { 717 return socket; 718 } 719 delete socket; 720 return NULL; 721 } 722 723 void Win32SocketServer::SetMessageQueue(MessageQueue* queue) { 724 message_queue_ = queue; 725 } 726 727 bool Win32SocketServer::Wait(int cms, bool process_io) { 728 BOOL b; 729 if (process_io) { 730 // Spin the Win32 message pump at least once, and as long as requested. 731 // This is the Thread::ProcessMessages case. 732 uint32 start = Time(); 733 MSG msg; 734 do { 735 SetTimer(wnd_.handle(), 0, cms, NULL); 736 b = GetMessage(&msg, NULL, 0, 0); 737 if (b) { 738 TranslateMessage(&msg); 739 DispatchMessage(&msg); 740 } 741 KillTimer(wnd_.handle(), 0); 742 } while (b && TimeSince(start) < cms); 743 } else if (cms != 0) { 744 // Sit and wait forever for a WakeUp. This is the Thread::Send case. 745 ASSERT(cms == -1); 746 MSG msg; 747 b = GetMessage(&msg, NULL, s_wm_wakeup_id, s_wm_wakeup_id); 748 { 749 CritScope scope(&cs_); 750 posted_ = false; 751 } 752 } else { 753 // No-op (cms == 0 && !process_io). This is the Pump case. 754 b = TRUE; 755 } 756 return (b != FALSE); 757 } 758 759 void Win32SocketServer::WakeUp() { 760 if (wnd_.handle()) { 761 // Set the "message pending" flag, if not already set. 762 { 763 CritScope scope(&cs_); 764 if (posted_) 765 return; 766 posted_ = true; 767 } 768 769 PostMessage(wnd_.handle(), s_wm_wakeup_id, 0, 0); 770 } 771 } 772 773 void Win32SocketServer::Pump() { 774 // Clear the "message pending" flag. 775 { 776 CritScope scope(&cs_); 777 posted_ = false; 778 } 779 780 // Dispatch all the messages that are currently in our queue. If new messages 781 // are posted during the dispatch, they will be handled in the next Pump. 782 // We use max(1, ...) to make sure we try to dispatch at least once, since 783 // this allow us to process "sent" messages, not included in the size() count. 784 Message msg; 785 for (size_t max_messages_to_process = _max<size_t>(1, message_queue_->size()); 786 max_messages_to_process > 0 && message_queue_->Get(&msg, 0, false); 787 --max_messages_to_process) { 788 message_queue_->Dispatch(&msg); 789 } 790 791 // Anything remaining? 792 int delay = message_queue_->GetDelay(); 793 if (delay == -1) { 794 KillTimer(wnd_.handle(), 1); 795 } else { 796 SetTimer(wnd_.handle(), 1, delay, NULL); 797 } 798 } 799 800 bool Win32SocketServer::MessageWindow::OnMessage(UINT wm, WPARAM wp, 801 LPARAM lp, LRESULT& lr) { 802 bool handled = false; 803 if (wm == s_wm_wakeup_id || (wm == WM_TIMER && wp == 1)) { 804 ss_->Pump(); 805 lr = 0; 806 handled = true; 807 } 808 return handled; 809 } 810 811 } // namespace talk_base 812