| /* |
| * Copyright (C) 2008 Collin Jackson <collinj@webkit.org> |
| * Copyright (C) 2009 Apple Inc. All Rights Reserved. |
| * Copyright (C) 2012 Igalia S.L. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "DNS.h" |
| #include "DNSResolveQueue.h" |
| |
| #include "KURL.h" |
| #include "Timer.h" |
| #include <wtf/HashSet.h> |
| #include <wtf/MainThread.h> |
| #include <wtf/RetainPtr.h> |
| #include <wtf/StdLibExtras.h> |
| #include <wtf/text/StringHash.h> |
| |
| #if PLATFORM(WIN) |
| #include "LoaderRunLoopCF.h" |
| #include <CFNetwork/CFNetwork.h> |
| #endif |
| |
| #if PLATFORM(MAC) && !PLATFORM(IOS) && __MAC_OS_X_VERSION_MIN_REQUIRED == 1050 |
| #include <SystemConfiguration/SystemConfiguration.h> |
| #endif |
| |
| |
| namespace WebCore { |
| |
| bool DNSResolveQueue::platformProxyIsEnabledInSystemPreferences() |
| { |
| // Don't do DNS prefetch if proxies are involved. For many proxy types, the user agent is never exposed |
| // to the IP address during normal operation. Querying an internal DNS server may not help performance, |
| // as it doesn't necessarily look up the actual external IP. Also, if DNS returns a fake internal address, |
| // local caches may keep it even after re-connecting to another network. |
| |
| #if !PLATFORM(MAC) || PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 |
| RetainPtr<CFDictionaryRef> proxySettings(AdoptCF, CFNetworkCopySystemProxySettings()); |
| #else |
| RetainPtr<CFDictionaryRef> proxySettings(AdoptCF, SCDynamicStoreCopyProxies(0)); |
| #endif |
| if (!proxySettings) |
| return false; |
| |
| static CFURLRef httpCFURL = KURL(ParsedURLString, "http://example.com/").createCFURL(); |
| static CFURLRef httpsCFURL = KURL(ParsedURLString, "https://example.com/").createCFURL(); |
| |
| RetainPtr<CFArrayRef> httpProxyArray(AdoptCF, CFNetworkCopyProxiesForURL(httpCFURL, proxySettings.get())); |
| RetainPtr<CFArrayRef> httpsProxyArray(AdoptCF, CFNetworkCopyProxiesForURL(httpsCFURL, proxySettings.get())); |
| |
| CFIndex httpProxyCount = CFArrayGetCount(httpProxyArray.get()); |
| CFIndex httpsProxyCount = CFArrayGetCount(httpsProxyArray.get()); |
| if (httpProxyCount == 1 && CFEqual(CFDictionaryGetValue(static_cast<CFDictionaryRef>(CFArrayGetValueAtIndex(httpProxyArray.get(), 0)), kCFProxyTypeKey), kCFProxyTypeNone)) |
| httpProxyCount = 0; |
| if (httpsProxyCount == 1 && CFEqual(CFDictionaryGetValue(static_cast<CFDictionaryRef>(CFArrayGetValueAtIndex(httpsProxyArray.get(), 0)), kCFProxyTypeKey), kCFProxyTypeNone)) |
| httpsProxyCount = 0; |
| |
| return httpProxyCount || httpsProxyCount; |
| } |
| |
| static void clientCallback(CFHostRef theHost, CFHostInfoType, const CFStreamError*, void*) |
| { |
| DNSResolveQueue::shared().decrementRequestCount(); // It's ok to call shared() from a secondary thread, the static variable has already been initialized by now. |
| CFRelease(theHost); |
| } |
| |
| void DNSResolveQueue::platformResolve(const String& hostname) |
| { |
| ASSERT(isMainThread()); |
| |
| RetainPtr<CFHostRef> host = adoptCF(CFHostCreateWithName(0, hostname.createCFString().get())); |
| if (!host) { |
| decrementRequestCount(); |
| return; |
| } |
| |
| CFHostClientContext context = { 0, 0, 0, 0, 0 }; |
| CFHostRef leakedHost = host.leakRef(); // The host will be released from clientCallback(). |
| Boolean result = CFHostSetClient(leakedHost, clientCallback, &context); |
| ASSERT_UNUSED(result, result); |
| #if !PLATFORM(WIN) |
| CFHostScheduleWithRunLoop(leakedHost, CFRunLoopGetMain(), kCFRunLoopCommonModes); |
| #else |
| // On Windows, we run a separate thread with CFRunLoop, which is where clientCallback will be called. |
| CFHostScheduleWithRunLoop(leakedHost, loaderRunLoop(), kCFRunLoopDefaultMode); |
| #endif |
| CFHostStartInfoResolution(leakedHost, kCFHostAddresses, 0); |
| } |
| |
| void prefetchDNS(const String& hostname) |
| { |
| ASSERT(isMainThread()); |
| if (hostname.isEmpty()) |
| return; |
| DNSResolveQueue::shared().add(hostname); |
| } |
| |
| } |