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
WSAErrorToString(int error,LPCSTR * description_result)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
ReportWSAError(LPCSTR context,int error,const SocketAddress & address)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
ReportWSAError(LPCSTR context,int error,const SocketAddress & address)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:
EventSink(Win32Socket * parent)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
Dispose()164 void Win32Socket::EventSink::Dispose() {
165 parent_ = NULL;
166 if (::IsWindow(handle())) {
167 ::DestroyWindow(handle());
168 } else {
169 delete this;
170 }
171 }
172
OnMessage(UINT uMsg,WPARAM wParam,LPARAM lParam,LRESULT & result)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
OnSocketNotify(UINT uMsg,WPARAM wParam,LPARAM lParam,LRESULT & result)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
OnDnsNotify(WPARAM wParam,LPARAM lParam,LRESULT & result)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
OnNcDestroy()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
Win32Socket()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
~Win32Socket()231 Win32Socket::~Win32Socket() {
232 Close();
233 }
234
CreateT(int family,int type)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
Attach(SOCKET s)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
SetTimeout(int ms)267 void Win32Socket::SetTimeout(int ms) {
268 if (sink_)
269 ::SetTimer(sink_->handle(), 1, ms, 0);
270 }
271
GetLocalAddress() const272 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
GetRemoteAddress() const287 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
Bind(const SocketAddress & addr)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
Connect(const SocketAddress & addr)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
DoConnect(const SocketAddress & addr)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
GetError() const384 int Win32Socket::GetError() const {
385 return error_;
386 }
387
SetError(int error)388 void Win32Socket::SetError(int error) {
389 error_ = error;
390 }
391
GetState() const392 Socket::ConnState Win32Socket::GetState() const {
393 return state_;
394 }
395
GetOption(Option opt,int * value)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
SetOption(Option opt,int value)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
Send(const void * buffer,size_t length)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
SendTo(const void * buffer,size_t length,const SocketAddress & addr)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
Recv(void * buffer,size_t length)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
RecvFrom(void * buffer,size_t length,SocketAddress * out_addr)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
Listen(int backlog)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
Accept(SocketAddress * out_addr)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
Close()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
EstimateMTU(uint16 * mtu)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
CreateSink()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
SetAsync(int events)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
HandleClosed(int close_error)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
PostClosed()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
UpdateLastError()584 void Win32Socket::UpdateLastError() {
585 error_ = WSAGetLastError();
586 }
587
TranslateOption(Option opt,int * slevel,int * sopt)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
OnSocketNotify(SOCKET socket,int event,int error)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
OnDnsNotify(HANDLE task,int error)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
Win32SocketServer(MessageQueue * message_queue)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
~Win32SocketServer()725 Win32SocketServer::~Win32SocketServer() {
726 if (wnd_.handle() != NULL) {
727 KillTimer(wnd_.handle(), 1);
728 wnd_.Destroy();
729 }
730 }
731
CreateSocket(int type)732 Socket* Win32SocketServer::CreateSocket(int type) {
733 return CreateSocket(AF_INET, type);
734 }
735
CreateSocket(int family,int type)736 Socket* Win32SocketServer::CreateSocket(int family, int type) {
737 return CreateAsyncSocket(family, type);
738 }
739
CreateAsyncSocket(int type)740 AsyncSocket* Win32SocketServer::CreateAsyncSocket(int type) {
741 return CreateAsyncSocket(AF_INET, type);
742 }
743
CreateAsyncSocket(int family,int type)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
SetMessageQueue(MessageQueue * queue)753 void Win32SocketServer::SetMessageQueue(MessageQueue* queue) {
754 message_queue_ = queue;
755 }
756
Wait(int cms,bool process_io)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
WakeUp()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
Pump()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
OnMessage(UINT wm,WPARAM wp,LPARAM lp,LRESULT & lr)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
851