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![Andreas Kling](/assets/img/avatar_default.png)
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
162 lines
4.7 KiB
C++
162 lines
4.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/Endian.h>
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#include <AK/LogStream.h>
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#include <AK/Optional.h>
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#include <AK/String.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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namespace AK {
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class [[gnu::packed]] IPv4Address {
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enum class SubnetClass : int {
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A = 0,
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B,
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C,
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D
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};
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public:
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using in_addr_t = u32;
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constexpr IPv4Address() = default;
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constexpr IPv4Address(u32 a, u32 b, u32 c, u32 d)
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{
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m_data = (d << 24) | (c << 16) | (b << 8) | a;
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}
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constexpr IPv4Address(const u8 data[4])
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{
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m_data = (u32(data[3]) << 24) | (u32(data[2]) << 16) | (u32(data[1]) << 8) | u32(data[0]);
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}
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constexpr IPv4Address(NetworkOrdered<u32> address)
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: m_data(address)
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{
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}
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constexpr u8 operator[](int i) const
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{
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VERIFY(i >= 0 && i < 4);
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return octet(SubnetClass(i));
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}
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String to_string() const
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{
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return String::formatted("{}.{}.{}.{}",
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octet(SubnetClass::A),
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octet(SubnetClass::B),
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octet(SubnetClass::C),
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octet(SubnetClass::D));
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}
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static Optional<IPv4Address> from_string(const StringView& string)
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{
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if (string.is_null())
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return {};
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const auto parts = string.split_view('.');
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u32 a {};
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u32 b {};
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u32 c {};
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u32 d {};
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if (parts.size() == 1) {
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d = parts[0].to_uint().value_or(256);
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} else if (parts.size() == 2) {
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a = parts[0].to_uint().value_or(256);
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d = parts[1].to_uint().value_or(256);
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} else if (parts.size() == 3) {
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a = parts[0].to_uint().value_or(256);
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b = parts[1].to_uint().value_or(256);
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d = parts[2].to_uint().value_or(256);
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} else if (parts.size() == 4) {
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a = parts[0].to_uint().value_or(256);
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b = parts[1].to_uint().value_or(256);
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c = parts[2].to_uint().value_or(256);
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d = parts[3].to_uint().value_or(256);
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} else {
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return {};
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}
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if (a > 255 || b > 255 || c > 255 || d > 255)
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return {};
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return IPv4Address(a, b, c, d);
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}
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constexpr in_addr_t to_in_addr_t() const { return m_data; }
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constexpr u32 to_u32() const { return m_data; }
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constexpr bool operator==(const IPv4Address& other) const = default;
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constexpr bool operator!=(const IPv4Address& other) const = default;
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constexpr bool is_zero() const
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{
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return m_data == 0u;
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}
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private:
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constexpr u32 octet(const SubnetClass subnet) const
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{
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NetworkOrdered<u32> address(m_data);
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constexpr auto bits_per_byte = 8;
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const auto bits_to_shift = bits_per_byte * int(subnet);
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return (m_data >> bits_to_shift) & 0x0000'00FF;
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}
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u32 m_data {};
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};
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static_assert(sizeof(IPv4Address) == 4);
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template<>
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struct Traits<IPv4Address> : public GenericTraits<IPv4Address> {
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static constexpr unsigned hash(const IPv4Address& address) { return int_hash(address.to_u32()); }
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};
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inline const LogStream& operator<<(const LogStream& stream, const IPv4Address& value)
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{
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return stream << value.to_string();
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}
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template<>
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struct Formatter<IPv4Address> : Formatter<String> {
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void format(FormatBuilder& builder, IPv4Address value)
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{
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return Formatter<String>::format(builder, value.to_string());
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}
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};
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}
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using AK::IPv4Address;
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