Source/WebCore/platform/network/cf/SocketStreamHandleCFNet.cpp

   1 /*
   2  * Copyright (C) 2009 Apple Inc.  All rights reserved.
   3  * Copyright (C) 2009 Google Inc.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include "config.h"
  33 #include "SocketStreamHandle.h"
  34
  35 #include "Credential.h"
  36 #include "CredentialStorage.h"
  37 #include "Logging.h"
  38 #include "ProtectionSpace.h"
  39 #include "SocketStreamError.h"
  40 #include "SocketStreamHandleClient.h"
  41 #include <wtf/MainThread.h>
  42 #include <wtf/text/WTFString.h>
  43
  44 #ifdef BUILDING_ON_LEOPARD
  45 #include <SystemConfiguration/SystemConfiguration.h>
  46 #endif
  47
  48 #if PLATFORM(WIN)
  49 #include "LoaderRunLoopCF.h"
  50 #include <CFNetwork/CFNetwork.h>
  51 #include <WebKitSystemInterface/WebKitSystemInterface.h>
  52 #else
  53 #include "WebCoreSystemInterface.h"
  54 #endif
  55
  56
  57 namespace WebCore {
  58
  59 SocketStreamHandle::SocketStreamHandle(const KURL& url, SocketStreamHandleClient* client)
  60     : SocketStreamHandleBase(url, client)
  61     , m_connectingSubstate(New)
  62     , m_connectionType(Unknown)
  63     , m_sentStoredCredentials(false)
  64 {
  65     LOG(Network, "SocketStreamHandle %p new client %p", this, m_client);
  66
  67     ASSERT(url.protocolIs("ws") || url.protocolIs("wss"));
  68
  69     KURL httpsURL(KURL(), "https://" + m_url.host());
  70     m_httpsURL.adoptCF(httpsURL.createCFURL());
  71
  72     createStreams();
  73     ASSERT(!m_readStream == !m_writeStream);
  74     if (!m_readStream) // Doing asynchronous PAC file processing, streams will be created later.
  75         return;
  76
  77     scheduleStreams();
  78 }
  79
  80 void SocketStreamHandle::scheduleStreams()
  81 {
  82     ASSERT(m_readStream);
  83     ASSERT(m_writeStream);
  84
  85     CFStreamClientContext clientContext = { 0, this, 0, 0, copyCFStreamDescription };
  86     // FIXME: Pass specific events we're interested in instead of -1.
  87     CFReadStreamSetClient(m_readStream.get(), static_cast<CFOptionFlags>(-1), readStreamCallback, &clientContext);
  88     CFWriteStreamSetClient(m_writeStream.get(), static_cast<CFOptionFlags>(-1), writeStreamCallback, &clientContext);
  89
  90 #if PLATFORM(WIN)
  91     CFReadStreamScheduleWithRunLoop(m_readStream.get(), loaderRunLoop(), kCFRunLoopDefaultMode);
  92     CFWriteStreamScheduleWithRunLoop(m_writeStream.get(), loaderRunLoop(), kCFRunLoopDefaultMode);
  93 #else
  94     CFReadStreamScheduleWithRunLoop(m_readStream.get(), CFRunLoopGetCurrent(), kCFRunLoopCommonModes);
  95     CFWriteStreamScheduleWithRunLoop(m_writeStream.get(), CFRunLoopGetCurrent(), kCFRunLoopCommonModes);
  96 #endif
  97
  98     CFReadStreamOpen(m_readStream.get());
  99     CFWriteStreamOpen(m_writeStream.get());
 100
 101     if (m_pacRunLoopSource)
 102         removePACRunLoopSource();
 103
 104     m_connectingSubstate = WaitingForConnect;
 105 }
 106
 107 CFStringRef SocketStreamHandle::copyPACExecutionDescription(void*)
 108 {
 109     return CFSTR("WebSocket proxy PAC file execution");
 110 }
 111
 112 struct MainThreadPACCallbackInfo {
 113     MainThreadPACCallbackInfo(SocketStreamHandle* handle, CFArrayRef proxyList) : handle(handle), proxyList(proxyList) { }
 114     RefPtr<SocketStreamHandle> handle;
 115     CFArrayRef proxyList;
 116 };
 117
 118 void SocketStreamHandle::pacExecutionCallback(void* client, CFArrayRef proxyList, CFErrorRef)
 119 {
 120     SocketStreamHandle* handle = static_cast<SocketStreamHandle*>(client);
 121     MainThreadPACCallbackInfo info(handle, proxyList);
 122     // If we're already on main thread (e.g. on Mac), callOnMainThreadAndWait() will be just a function call.
 123     callOnMainThreadAndWait(pacExecutionCallbackMainThread, &info);
 124 }
 125
 126 void SocketStreamHandle::pacExecutionCallbackMainThread(void* invocation)
 127 {
 128     MainThreadPACCallbackInfo* info = static_cast<MainThreadPACCallbackInfo*>(invocation);
 129     ASSERT(info->handle->m_connectingSubstate == ExecutingPACFile);
 130     // This time, the array won't have PAC as a first entry.
 131     info->handle->chooseProxyFromArray(info->proxyList);
 132     info->handle->createStreams();
 133     info->handle->scheduleStreams();
 134 }
 135
 136 void SocketStreamHandle::executePACFileURL(CFURLRef pacFileURL)
 137 {
 138     // CFNetwork returns an empty proxy array for WebScoket schemes, so use m_httpsURL.
 139     CFStreamClientContext clientContext = { 0, this, 0, 0, copyPACExecutionDescription };
 140     m_pacRunLoopSource.adoptCF(CFNetworkExecuteProxyAutoConfigurationURL(pacFileURL, m_httpsURL.get(), pacExecutionCallback, &clientContext));
 141 #if PLATFORM(WIN)
 142     CFRunLoopAddSource(loaderRunLoop(), m_pacRunLoopSource.get(), kCFRunLoopDefaultMode);
 143 #else
 144     CFRunLoopAddSource(CFRunLoopGetCurrent(), m_pacRunLoopSource.get(), kCFRunLoopCommonModes);
 145 #endif
 146     m_connectingSubstate = ExecutingPACFile;
 147 }
 148
 149 void SocketStreamHandle::removePACRunLoopSource()
 150 {
 151     ASSERT(m_pacRunLoopSource);
 152
 153     CFRunLoopSourceInvalidate(m_pacRunLoopSource.get());
 154 #if PLATFORM(WIN)
 155     CFRunLoopRemoveSource(loaderRunLoop(), m_pacRunLoopSource.get(), kCFRunLoopDefaultMode);
 156 #else
 157     CFRunLoopRemoveSource(CFRunLoopGetCurrent(), m_pacRunLoopSource.get(), kCFRunLoopCommonModes);
 158 #endif
 159     m_pacRunLoopSource = 0;
 160 }
 161
 162 void SocketStreamHandle::chooseProxy()
 163 {
 164 #ifndef BUILDING_ON_LEOPARD
 165     RetainPtr<CFDictionaryRef> proxyDictionary(AdoptCF, CFNetworkCopySystemProxySettings());
 166 #else
 167     // We don't need proxy information often, so there is no need to set up a permanent dynamic store session.
 168     RetainPtr<CFDictionaryRef> proxyDictionary(AdoptCF, SCDynamicStoreCopyProxies(0));
 169 #endif
 170
 171     // SOCKS or HTTPS (AKA CONNECT) proxies are supported.
 172     // WebSocket protocol relies on handshake being transferred unchanged, so we need a proxy that will not modify headers.
 173     // Since HTTP proxies must add Via headers, they are highly unlikely to work.
 174     // Many CONNECT proxies limit connectivity to port 443, so we prefer SOCKS, if configured.
 175
 176     if (!proxyDictionary) {
 177         m_connectionType = Direct;
 178         return;
 179     }
 180
 181     // CFNetworkCopyProxiesForURL doesn't know about WebSocket schemes, so pretend to use http.
 182     // Always use "https" to get HTTPS proxies in result - we'll try to use those for ws:// even though many are configured to reject connections to ports other than 443.
 183     RetainPtr<CFArrayRef> proxyArray(AdoptCF, CFNetworkCopyProxiesForURL(m_httpsURL.get(), proxyDictionary.get()));
 184
 185     chooseProxyFromArray(proxyArray.get());
 186 }
 187
 188 void SocketStreamHandle::chooseProxyFromArray(CFArrayRef proxyArray)
 189 {
 190     if (!proxyArray) {
 191         m_connectionType = Direct;
 192         return;
 193     }
 194
 195     CFIndex proxyArrayCount = CFArrayGetCount(proxyArray);
 196
 197     // PAC is always the first entry, if present.
 198     if (proxyArrayCount) {
 199         CFDictionaryRef proxyInfo = static_cast<CFDictionaryRef>(CFArrayGetValueAtIndex(proxyArray, 0));
 200         CFTypeRef proxyType = CFDictionaryGetValue(proxyInfo, kCFProxyTypeKey);
 201         if (proxyType && CFGetTypeID(proxyType) == CFStringGetTypeID()) {
 202             if (CFEqual(proxyType, kCFProxyTypeAutoConfigurationURL)) {
 203                 CFTypeRef pacFileURL = CFDictionaryGetValue(proxyInfo, kCFProxyAutoConfigurationURLKey);
 204                 if (pacFileURL && CFGetTypeID(pacFileURL) == CFURLGetTypeID()) {
 205                     executePACFileURL(static_cast<CFURLRef>(pacFileURL));
 206                     return;
 207                 }
 208             }
 209         }
 210     }
 211
 212     CFDictionaryRef chosenProxy = 0;
 213     for (CFIndex i = 0; i < proxyArrayCount; ++i) {
 214         CFDictionaryRef proxyInfo = static_cast<CFDictionaryRef>(CFArrayGetValueAtIndex(proxyArray, i));
 215         CFTypeRef proxyType = CFDictionaryGetValue(proxyInfo, kCFProxyTypeKey);
 216         if (proxyType && CFGetTypeID(proxyType) == CFStringGetTypeID()) {
 217             if (CFEqual(proxyType, kCFProxyTypeSOCKS)) {
 218                 m_connectionType = SOCKSProxy;
 219                 chosenProxy = proxyInfo;
 220                 break;
 221             }
 222             if (CFEqual(proxyType, kCFProxyTypeHTTPS)) {
 223                 m_connectionType = CONNECTProxy;
 224                 chosenProxy = proxyInfo;
 225                 // Keep looking for proxies, as a SOCKS one is preferable.
 226             }
 227         }
 228     }
 229
 230     if (chosenProxy) {
 231         ASSERT(m_connectionType != Unknown);
 232         ASSERT(m_connectionType != Direct);
 233
 234         CFTypeRef proxyHost = CFDictionaryGetValue(chosenProxy, kCFProxyHostNameKey);
 235         CFTypeRef proxyPort = CFDictionaryGetValue(chosenProxy, kCFProxyPortNumberKey);
 236
 237         if (proxyHost && CFGetTypeID(proxyHost) == CFStringGetTypeID() && proxyPort && CFGetTypeID(proxyPort) == CFNumberGetTypeID()) {
 238             m_proxyHost = static_cast<CFStringRef>(proxyHost);
 239             m_proxyPort = static_cast<CFNumberRef>(proxyPort);
 240             return;
 241         }
 242     }
 243
 244     m_connectionType = Direct;
 245 }
 246
 247
 248 void SocketStreamHandle::createStreams()
 249 {
 250     if (m_connectionType == Unknown)
 251         chooseProxy();
 252
 253     // If it's still unknown, then we're resolving a PAC file asynchronously.
 254     if (m_connectionType == Unknown)
 255         return;
 256
 257     RetainPtr<CFStringRef> host(AdoptCF, m_url.host().createCFString());
 258
 259     // Creating streams to final destination, not to proxy.
 260     CFReadStreamRef readStream = 0;
 261     CFWriteStreamRef writeStream = 0;
 262     CFStreamCreatePairWithSocketToHost(0, host.get(), port(), &readStream, &writeStream);
 263
 264     m_readStream.adoptCF(readStream);
 265     m_writeStream.adoptCF(writeStream);
 266
 267     switch (m_connectionType) {
 268     case Unknown:
 269         ASSERT_NOT_REACHED();
 270         break;
 271     case Direct:
 272         break;
 273     case SOCKSProxy: {
 274         // FIXME: SOCKS5 doesn't do challenge-response, should we try to apply credentials from Keychain right away?
 275         // But SOCKS5 credentials don't work at the time of this writing anyway, see <rdar://6776698>.
 276         const void* proxyKeys[] = { kCFStreamPropertySOCKSProxyHost, kCFStreamPropertySOCKSProxyPort };
 277         const void* proxyValues[] = { m_proxyHost.get(), m_proxyPort.get() };
 278         RetainPtr<CFDictionaryRef> connectDictionary(AdoptCF, CFDictionaryCreate(0, proxyKeys, proxyValues, WTF_ARRAY_LENGTH(proxyKeys), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks));
 279         CFReadStreamSetProperty(m_readStream.get(), kCFStreamPropertySOCKSProxy, connectDictionary.get());
 280         break;
 281         }
 282     case CONNECTProxy:
 283         wkSetCONNECTProxyForStream(m_readStream.get(), m_proxyHost.get(), m_proxyPort.get());
 284         break;
 285     }
 286
 287     if (shouldUseSSL()) {
 288         const void* keys[] = { kCFStreamSSLPeerName, kCFStreamSSLLevel };
 289         const void* values[] = { host.get(), kCFStreamSocketSecurityLevelNegotiatedSSL };
 290         RetainPtr<CFDictionaryRef> settings(AdoptCF, CFDictionaryCreate(0, keys, values, WTF_ARRAY_LENGTH(keys), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks));
 291         CFReadStreamSetProperty(m_readStream.get(), kCFStreamPropertySSLSettings, settings.get());
 292         CFWriteStreamSetProperty(m_writeStream.get(), kCFStreamPropertySSLSettings, settings.get());
 293     }
 294 }
 295
 296 static bool getStoredCONNECTProxyCredentials(const ProtectionSpace& protectionSpace, String& login, String& password)
 297 {
 298     // Try system credential storage first, matching HTTP behavior (CFNetwork only asks the client for password if it couldn't find it in Keychain).
 299     Credential storedCredential = CredentialStorage::getFromPersistentStorage(protectionSpace);
 300     if (storedCredential.isEmpty())
 301         storedCredential = CredentialStorage::get(protectionSpace);
 302
 303     if (storedCredential.isEmpty())
 304         return false;
 305
 306     login = storedCredential.user();
 307     password = storedCredential.password();
 308
 309     return true;
 310 }
 311
 312 static ProtectionSpaceAuthenticationScheme authenticationSchemeFromAuthenticationMethod(CFStringRef method)
 313 {
 314     if (CFEqual(method, kCFHTTPAuthenticationSchemeBasic))
 315         return ProtectionSpaceAuthenticationSchemeHTTPBasic;
 316     if (CFEqual(method, kCFHTTPAuthenticationSchemeDigest))
 317         return ProtectionSpaceAuthenticationSchemeHTTPDigest;
 318     if (CFEqual(method, kCFHTTPAuthenticationSchemeNTLM))
 319         return ProtectionSpaceAuthenticationSchemeNTLM;
 320     if (CFEqual(method, kCFHTTPAuthenticationSchemeNegotiate))
 321         return ProtectionSpaceAuthenticationSchemeNegotiate;
 322     ASSERT_NOT_REACHED();
 323     return ProtectionSpaceAuthenticationSchemeUnknown;
 324 }
 325
 326 void SocketStreamHandle::addCONNECTCredentials(CFHTTPMessageRef proxyResponse)
 327 {
 328     RetainPtr<CFHTTPAuthenticationRef> authentication(AdoptCF, CFHTTPAuthenticationCreateFromResponse(0, proxyResponse));
 329
 330     if (!CFHTTPAuthenticationRequiresUserNameAndPassword(authentication.get())) {
 331         // That's all we can offer...
 332         m_client->didFailSocketStream(this, SocketStreamError()); // FIXME: Provide a sensible error.
 333         return;
 334     }
 335
 336     int port = 0;
 337     CFNumberGetValue(m_proxyPort.get(), kCFNumberIntType, &port);
 338     RetainPtr<CFStringRef> methodCF(AdoptCF, CFHTTPAuthenticationCopyMethod(authentication.get()));
 339     RetainPtr<CFStringRef> realmCF(AdoptCF, CFHTTPAuthenticationCopyRealm(authentication.get()));
 340     ProtectionSpace protectionSpace(String(m_proxyHost.get()), port, ProtectionSpaceProxyHTTPS, String(realmCF.get()), authenticationSchemeFromAuthenticationMethod(methodCF.get()));
 341     String login;
 342     String password;
 343     if (!m_sentStoredCredentials && getStoredCONNECTProxyCredentials(protectionSpace, login, password)) {
 344         // Try to apply stored credentials, if we haven't tried those already.
 345         RetainPtr<CFStringRef> loginCF(AdoptCF, login.createCFString());
 346         RetainPtr<CFStringRef> passwordCF(AdoptCF, password.createCFString());
 347         // Creating a temporary request to make CFNetwork apply credentials to it. Unfortunately, this cannot work with NTLM authentication.
 348         RetainPtr<CFHTTPMessageRef> dummyRequest(AdoptCF, CFHTTPMessageCreateRequest(0, CFSTR("GET"), m_httpsURL.get(), kCFHTTPVersion1_1));
 349
 350         Boolean appliedCredentials = CFHTTPMessageApplyCredentials(dummyRequest.get(), authentication.get(), loginCF.get(), passwordCF.get(), 0);
 351         ASSERT_UNUSED(appliedCredentials, appliedCredentials);
 352
 353         RetainPtr<CFStringRef> proxyAuthorizationString(AdoptCF, CFHTTPMessageCopyHeaderFieldValue(dummyRequest.get(), CFSTR("Proxy-Authorization")));
 354
 355         if (!proxyAuthorizationString) {
 356             // Fails e.g. for NTLM auth.
 357             m_client->didFailSocketStream(this, SocketStreamError()); // FIXME: Provide a sensible error.
 358             return;
 359         }
 360
 361         // Setting the authorization results in a new connection attempt.
 362         wkSetCONNECTProxyAuthorizationForStream(m_readStream.get(), proxyAuthorizationString.get());
 363         m_sentStoredCredentials = true;
 364         return;
 365     }
 366
 367     // FIXME: Ask the client if credentials could not be found.
 368
 369     m_client->didFailSocketStream(this, SocketStreamError()); // FIXME: Provide a sensible error.
 370 }
 371
 372 CFStringRef SocketStreamHandle::copyCFStreamDescription(void* info)
 373 {
 374     SocketStreamHandle* handle = static_cast<SocketStreamHandle*>(info);
 375     return String("WebKit socket stream, " + handle->m_url.string()).createCFString();
 376 }
 377
 378 struct MainThreadEventCallbackInfo {
 379     MainThreadEventCallbackInfo(CFStreamEventType type, SocketStreamHandle* handle) : type(type), handle(handle) { }
 380     CFStreamEventType type;
 381     RefPtr<SocketStreamHandle> handle;
 382 };
 383
 384 void SocketStreamHandle::readStreamCallback(CFReadStreamRef stream, CFStreamEventType type, void* clientCallBackInfo)
 385 {
 386     SocketStreamHandle* handle = static_cast<SocketStreamHandle*>(clientCallBackInfo);
 387     ASSERT_UNUSED(stream, stream == handle->m_readStream.get());
 388 #if PLATFORM(WIN)
 389     MainThreadEventCallbackInfo info(type, handle);
 390     callOnMainThreadAndWait(readStreamCallbackMainThread, &info);
 391 #else
 392     ASSERT(isMainThread());
 393     handle->readStreamCallback(type);
 394 #endif
 395 }
 396
 397 void SocketStreamHandle::writeStreamCallback(CFWriteStreamRef stream, CFStreamEventType type, void* clientCallBackInfo)
 398 {
 399     SocketStreamHandle* handle = static_cast<SocketStreamHandle*>(clientCallBackInfo);
 400     ASSERT_UNUSED(stream, stream == handle->m_writeStream.get());
 401 #if PLATFORM(WIN)
 402     MainThreadEventCallbackInfo info(type, handle);
 403     callOnMainThreadAndWait(writeStreamCallbackMainThread, &info);
 404 #else
 405     ASSERT(isMainThread());
 406     handle->writeStreamCallback(type);
 407 #endif
 408 }
 409
 410 #if PLATFORM(WIN)
 411 void SocketStreamHandle::readStreamCallbackMainThread(void* invocation)
 412 {
 413     MainThreadEventCallbackInfo* info = static_cast<MainThreadEventCallbackInfo*>(invocation);
 414     info->handle->readStreamCallback(info->type);
 415 }
 416
 417 void SocketStreamHandle::writeStreamCallbackMainThread(void* invocation)
 418 {
 419     MainThreadEventCallbackInfo* info = static_cast<MainThreadEventCallbackInfo*>(invocation);
 420     info->handle->writeStreamCallback(info->type);
 421 }
 422 #endif // PLATFORM(WIN)
 423
 424 void SocketStreamHandle::readStreamCallback(CFStreamEventType type)
 425 {
 426     switch(type) {
 427     case kCFStreamEventNone:
 428         break;
 429     case kCFStreamEventOpenCompleted:
 430         break;
 431     case kCFStreamEventHasBytesAvailable: {
 432         if (m_connectingSubstate == WaitingForConnect) {
 433             if (m_connectionType == CONNECTProxy) {
 434                 RetainPtr<CFHTTPMessageRef> proxyResponse(AdoptCF, wkCopyCONNECTProxyResponse(m_readStream.get(), m_httpsURL.get()));
 435                 if (proxyResponse && (407 == CFHTTPMessageGetResponseStatusCode(proxyResponse.get()))) {
 436                     addCONNECTCredentials(proxyResponse.get());
 437                     return;
 438                 }
 439             }
 440         } else if (m_connectingSubstate == WaitingForCredentials)
 441             break;
 442
 443         if (m_connectingSubstate == WaitingForConnect) {
 444             m_connectingSubstate = Connected;
 445             m_state = Open;
 446
 447             RefPtr<SocketStreamHandle> protect(this); // The client can close the handle, potentially removing the last reference.
 448             m_client->didOpenSocketStream(this);
 449             if (m_state == Closed)
 450                 break;
 451             // Fall through.
 452         } else if (m_state == Closed)
 453             break;
 454
 455         ASSERT(m_state == Open);
 456         ASSERT(m_connectingSubstate == Connected);
 457
 458         CFIndex length;
 459         UInt8 localBuffer[1024]; // Used if CFReadStreamGetBuffer couldn't return anything.
 460         const UInt8* ptr = CFReadStreamGetBuffer(m_readStream.get(), 0, &length);
 461         if (!ptr) {
 462             length = CFReadStreamRead(m_readStream.get(), localBuffer, sizeof(localBuffer));
 463             ptr = localBuffer;
 464         }
 465
 466         m_client->didReceiveSocketStreamData(this, reinterpret_cast<const char*>(ptr), length);
 467
 468         break;
 469     }
 470     case kCFStreamEventCanAcceptBytes:
 471         ASSERT_NOT_REACHED();
 472         break;
 473     case kCFStreamEventErrorOccurred: {
 474         RetainPtr<CFErrorRef> error(AdoptCF, CFReadStreamCopyError(m_readStream.get()));
 475         reportErrorToClient(error.get());
 476         break;
 477     }
 478     case kCFStreamEventEndEncountered:
 479         platformClose();
 480         break;
 481     }
 482 }
 483
 484 void SocketStreamHandle::writeStreamCallback(CFStreamEventType type)
 485 {
 486     switch(type) {
 487     case kCFStreamEventNone:
 488         break;
 489     case kCFStreamEventOpenCompleted:
 490         break;
 491     case kCFStreamEventHasBytesAvailable:
 492         ASSERT_NOT_REACHED();
 493         break;
 494     case kCFStreamEventCanAcceptBytes: {
 495         // Possibly, a spurious event from CONNECT handshake.
 496         if (!CFWriteStreamCanAcceptBytes(m_writeStream.get()))
 497             return;
 498
 499         if (m_connectingSubstate == WaitingForCredentials)
 500             break;
 501
 502         if (m_connectingSubstate == WaitingForConnect) {
 503             m_connectingSubstate = Connected;
 504             m_state = Open;
 505
 506             RefPtr<SocketStreamHandle> protect(this); // The client can close the handle, potentially removing the last reference.
 507             m_client->didOpenSocketStream(this);
 508             break;
 509         }
 510
 511         ASSERT(m_state == Open);
 512         ASSERT(m_connectingSubstate == Connected);
 513
 514         sendPendingData();
 515         break;
 516     }
 517     case kCFStreamEventErrorOccurred: {
 518         RetainPtr<CFErrorRef> error(AdoptCF, CFWriteStreamCopyError(m_writeStream.get()));
 519         reportErrorToClient(error.get());
 520         break;
 521     }
 522     case kCFStreamEventEndEncountered:
 523         // FIXME: Currently, we handle closing in read callback, but these can come independently (e.g. a server can stop listening, but keep sending data).
 524         break;
 525     }
 526 }
 527
 528 void SocketStreamHandle::reportErrorToClient(CFErrorRef error)
 529 {
 530     CFIndex errorCode = CFErrorGetCode(error);
 531     String description;
 532
 533 #if PLATFORM(MAC)
 534     if (CFEqual(CFErrorGetDomain(error), kCFErrorDomainOSStatus)) {
 535         const char* descriptionOSStatus = GetMacOSStatusCommentString(static_cast<OSStatus>(errorCode));
 536         if (descriptionOSStatus && descriptionOSStatus[0] != '\0')
 537             description = "OSStatus Error " + String::number(errorCode) + ": " + descriptionOSStatus;
 538     }
 539 #endif
 540
 541     if (description.isNull()) {
 542         RetainPtr<CFStringRef> descriptionCF(AdoptCF, CFErrorCopyDescription(error));
 543         description = String(descriptionCF.get());
 544     }
 545
 546     m_client->didFailSocketStream(this, SocketStreamError(static_cast<int>(errorCode), m_url.string(), description));
 547 }
 548
 549 SocketStreamHandle::~SocketStreamHandle()
 550 {
 551     LOG(Network, "SocketStreamHandle %p dtor", this);
 552
 553     ASSERT(!m_pacRunLoopSource);
 554 }
 555
 556 int SocketStreamHandle::platformSend(const char* data, int length)
 557 {
 558     if (!CFWriteStreamCanAcceptBytes(m_writeStream.get()))
 559         return 0;
 560
 561     return CFWriteStreamWrite(m_writeStream.get(), reinterpret_cast<const UInt8*>(data), length);
 562 }
 563
 564 void SocketStreamHandle::platformClose()
 565 {
 566     LOG(Network, "SocketStreamHandle %p platformClose", this);
 567
 568     if (m_pacRunLoopSource)
 569         removePACRunLoopSource();
 570
 571     ASSERT(!m_readStream == !m_writeStream);
 572     if (!m_readStream) {
 573         if (m_connectingSubstate == New || m_connectingSubstate == ExecutingPACFile)
 574             m_client->didCloseSocketStream(this);
 575         return;
 576     }
 577
 578 #if PLATFORM(WIN)
 579     CFReadStreamUnscheduleFromRunLoop(m_readStream.get(), loaderRunLoop(), kCFRunLoopDefaultMode);
 580     CFWriteStreamUnscheduleFromRunLoop(m_writeStream.get(), loaderRunLoop(), kCFRunLoopDefaultMode);
 581 #else
 582     CFReadStreamUnscheduleFromRunLoop(m_readStream.get(), CFRunLoopGetCurrent(), kCFRunLoopCommonModes);
 583     CFWriteStreamUnscheduleFromRunLoop(m_writeStream.get(), CFRunLoopGetCurrent(), kCFRunLoopCommonModes);
 584 #endif
 585
 586     CFReadStreamClose(m_readStream.get());
 587     CFWriteStreamClose(m_writeStream.get());
 588
 589     m_readStream = 0;
 590     m_writeStream = 0;
 591
 592     m_client->didCloseSocketStream(this);
 593 }
 594
 595 void SocketStreamHandle::receivedCredential(const AuthenticationChallenge&, const Credential&)
 596 {
 597 }
 598
 599 void SocketStreamHandle::receivedRequestToContinueWithoutCredential(const AuthenticationChallenge&)
 600 {
 601 }
 602
 603 void SocketStreamHandle::receivedCancellation(const AuthenticationChallenge&)
 604 {
 605 }
 606
 607 unsigned short SocketStreamHandle::port() const
 608 {
 609     if (unsigned short urlPort = m_url.port())
 610         return urlPort;
 611     if (shouldUseSSL())
 612         return 443;
 613     return 80;
 614 }
 615
 616 }  // namespace WebCore