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/*
* Copyright (C) 2008 Collin Jackson <collinj@webkit.org>
*
* 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 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.
*/
#pragma once
#include <optional>
#include <wtf/Forward.h>
#include <wtf/HashTraits.h>
#include <wtf/StdLibExtras.h>
#if OS(WINDOWS)
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <netinet/in.h>
#endif
namespace WebCore {
class IPAddress {
public:
explicit IPAddress(const struct in_addr& address)
: m_address(address)
{
}
explicit IPAddress(const struct in6_addr& address)
: m_address(address)
{
}
explicit IPAddress(WTF::HashTableEmptyValueType)
: m_address(WTF::HashTableEmptyValue)
{
}
bool isHashTableEmptyValue() const { return std::holds_alternative<WTF::HashTableEmptyValueType>(m_address); }
WEBCORE_EXPORT IPAddress isolatedCopy() const;
WEBCORE_EXPORT unsigned matchingNetMaskLength(const IPAddress& other) const;
WEBCORE_EXPORT static std::optional<IPAddress> fromString(const String&);
bool isIPv4() const { return std::holds_alternative<struct in_addr>(m_address); }
bool isIPv6() const { return std::holds_alternative<struct in6_addr>(m_address); }
bool containsOnlyZeros() const;
WEBCORE_EXPORT bool isLoopback() const;
const struct in_addr& ipv4Address() const { return std::get<struct in_addr>(m_address); }
const struct in6_addr& ipv6Address() const { return std::get<struct in6_addr>(m_address); }
friend std::partial_ordering operator<=>(const IPAddress& a, const IPAddress& b)
{
if (a.isIPv4() && b.isIPv4())
return compareSpans(asByteSpan(a.ipv4Address()), asByteSpan(b.ipv4Address()));
if (a.isIPv6() && b.isIPv6())
return compareSpans(asByteSpan(a.ipv6Address()), asByteSpan(b.ipv6Address()));
return std::partial_ordering::unordered;
}
friend bool operator==(const IPAddress& a, const IPAddress& b) { return is_eq(a <=> b); }
private:
Variant<WTF::HashTableEmptyValueType, struct in_addr, struct in6_addr> m_address;
};
enum class DNSError { Unknown, CannotResolve, Cancelled };
using DNSAddressesOrError = Expected<Vector<IPAddress>, DNSError>;
using DNSCompletionHandler = CompletionHandler<void(DNSAddressesOrError&&)>;
WEBCORE_EXPORT void prefetchDNS(const String& hostname);
WEBCORE_EXPORT void resolveDNS(const String& hostname, uint64_t identifier, DNSCompletionHandler&&);
WEBCORE_EXPORT void stopResolveDNS(uint64_t identifier);
WEBCORE_EXPORT bool isIPAddressDisallowed(const URL&);
} // namespace WebCore
namespace WTF {
template<> struct HashTraits<WebCore::IPAddress> : GenericHashTraits<WebCore::IPAddress> {
static WebCore::IPAddress emptyValue() { return WebCore::IPAddress { WTF::HashTableEmptyValue }; }
static bool isEmptyValue(const WebCore::IPAddress& value) { return value.isHashTableEmptyValue(); }
};
} // namespace WTF
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