1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Endian.h>
#include <AK/Optional.h>
#include <AK/String.h>
#include <AK/StringView.h>
#include <AK/Vector.h>
namespace AK {
class [[gnu::packed]] IPv4Address {
enum class SubnetClass : int {
A = 0,
B,
C,
D
};
public:
using in_addr_t = u32;
constexpr IPv4Address() = default;
constexpr IPv4Address(u32 a, u32 b, u32 c, u32 d)
{
m_data = (d << 24) | (c << 16) | (b << 8) | a;
}
constexpr IPv4Address(const u8 data[4])
{
m_data = (u32(data[3]) << 24) | (u32(data[2]) << 16) | (u32(data[1]) << 8) | u32(data[0]);
}
constexpr IPv4Address(NetworkOrdered<u32> address)
: m_data(address)
{
}
constexpr u8 operator[](int i) const
{
VERIFY(i >= 0 && i < 4);
return octet(SubnetClass(i));
}
String to_string() const
{
return String::formatted("{}.{}.{}.{}",
octet(SubnetClass::A),
octet(SubnetClass::B),
octet(SubnetClass::C),
octet(SubnetClass::D));
}
String to_string_reversed() const
{
return String::formatted("{}.{}.{}.{}",
octet(SubnetClass::D),
octet(SubnetClass::C),
octet(SubnetClass::B),
octet(SubnetClass::A));
}
static Optional<IPv4Address> from_string(StringView string)
{
if (string.is_null())
return {};
const auto parts = string.split_view('.');
u32 a {};
u32 b {};
u32 c {};
u32 d {};
if (parts.size() == 1) {
d = parts[0].to_uint().value_or(256);
} else if (parts.size() == 2) {
a = parts[0].to_uint().value_or(256);
d = parts[1].to_uint().value_or(256);
} else if (parts.size() == 3) {
a = parts[0].to_uint().value_or(256);
b = parts[1].to_uint().value_or(256);
d = parts[2].to_uint().value_or(256);
} else if (parts.size() == 4) {
a = parts[0].to_uint().value_or(256);
b = parts[1].to_uint().value_or(256);
c = parts[2].to_uint().value_or(256);
d = parts[3].to_uint().value_or(256);
} else {
return {};
}
if (a > 255 || b > 255 || c > 255 || d > 255)
return {};
return IPv4Address(a, b, c, d);
}
constexpr in_addr_t to_in_addr_t() const { return m_data; }
constexpr u32 to_u32() const { return m_data; }
constexpr bool operator==(const IPv4Address& other) const = default;
constexpr bool operator!=(const IPv4Address& other) const = default;
constexpr bool is_zero() const
{
return m_data == 0u;
}
private:
constexpr u32 octet(const SubnetClass subnet) const
{
NetworkOrdered<u32> address(m_data);
constexpr auto bits_per_byte = 8;
const auto bits_to_shift = bits_per_byte * int(subnet);
return (m_data >> bits_to_shift) & 0x0000'00FF;
}
u32 m_data {};
};
static_assert(sizeof(IPv4Address) == 4);
template<>
struct Traits<IPv4Address> : public GenericTraits<IPv4Address> {
static constexpr unsigned hash(const IPv4Address& address) { return int_hash(address.to_u32()); }
};
template<>
struct Formatter<IPv4Address> : Formatter<String> {
ErrorOr<void> format(FormatBuilder& builder, IPv4Address value)
{
return Formatter<String>::format(builder, value.to_string());
}
};
}
using AK::IPv4Address;
|
