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AK: Add initial support for obscure IPv4 address notations

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This change aims to add support for obscure IPv4 address notations, such as 1.1 (which should be equal to 1.0.0.1), or the hypothetical address 1 (which is equal to 0.0.0.1). This is supported on other platforms as well, such as Linux, Windows, *BSD, and even Haiku.
This commit is contained in:
Panagiotis Vasilopoulos 2020-08-13 00:57:43 +03:00 committed by Andreas Kling
parent 138595961b
commit dcfc54d767
Notes: sideshowbarker 2024-07-19 03:40:38 +09:00 
Author: https://github.com/n0toose 🔰
Commit: https://github.com/SerenityOS/serenity/commit/dcfc54d767b
Pull-request: https://github.com/SerenityOS/serenity/pull/3110
Reviewed-by: https://github.com/BenWiederhake
Reviewed-by: https://github.com/linusg
Reviewed-by: https://github.com/petelliott
Reviewed-by: https://github.com/stelar7
1 changed files with 31 additions and 6 deletions
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37
AK/IPv4Address.h
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@ -40,7 +40,7 @@ namespace AK {
class [[gnu::packed]] IPv4Address
{
public:
IPv4Address() {}
IPv4Address() { }
IPv4Address(const u8 data[4])
{
m_data[0] = data[0];
@ -76,12 +76,37 @@ public:
if (string.is_null())
return {};
auto parts = string.split_view('.');
if (parts.size() != 4)
u32 a;
u32 b;
u32 c;
u32 d;
if (parts.size() == 1) {
a = 0;
b = 0;
c = 0;
d = parts[1].to_uint().value_or(256);
} else if (parts.size() == 2) {
a = parts[1].to_uint().value_or(256);
b = 0;
c = 0;
d = parts[2].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);
c = 0;
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 {};
auto a = parts[0].to_uint().value_or(256);
auto b = parts[1].to_uint().value_or(256);
auto c = parts[2].to_uint().value_or(256);
auto d = parts[3].to_uint().value_or(256);
}
if (a > 255 || b > 255 || c > 255 || d > 255)
return {};
return IPv4Address((u8)a, (u8)b, (u8)c, (u8)d);