/* * Copyright (C) 2019 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 INC. 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 INC. OR ITS 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. */ #pragma once #include <wtf/HashMap.h> #include <wtf/Lock.h> #include <wtf/MonotonicTime.h> #include <wtf/Optional.h> #include <wtf/RunLoop.h> #include <wtf/Vector.h> #include <wtf/glib/GRefPtr.h> #include <wtf/text/CString.h> typedef struct _GInetAddress GInetAddress; namespace WebKit { class DNSCache { public: DNSCache(); ~DNSCache() = default; enum class Type { Default, IPv4Only, IPv6Only }; Optional<Vector<GRefPtr<GInetAddress>>> lookup(const CString& host, Type = Type::Default); void update(const CString& host, Vector<GRefPtr<GInetAddress>>&&, Type = Type::Default); void clear(); private: struct CachedResponse { Vector<GRefPtr<GInetAddress>> addressList; MonotonicTime expirationTime; }; using DNSCacheMap = HashMap<CString, CachedResponse>; DNSCacheMap& mapForType(Type); void removeExpiredResponsesFired(); void removeExpiredResponsesInMap(DNSCacheMap&); void pruneResponsesInMap(DNSCacheMap&); Lock m_lock; DNSCacheMap m_dnsMap; #if GLIB_CHECK_VERSION(2, 59, 0) DNSCacheMap m_ipv4Map; DNSCacheMap m_ipv6Map; #endif RunLoop::Timer<DNSCache> m_expiredTimer; }; } // namespace WebKit