AK: Introduce IPAddressCidr datatype #25006

famfo · 2024-09-09T17:55:42Z

This commit introduces a CIDR datatype which will become handy especially for IPv6 to not have to deal with netmasks.

kleinesfilmroellchen

(note to other reviewers: this is part of SIP6TF, so I was consulted on quite a bit of this code and may be biased)

Very nice work, and extensive tests, I like it. I'm not happy with the name though, so some bikeshedding may be required.

AK/IpAddressCidr.h

Hendiadyoin1

Mainly Nits on my end, that would likely need support from other places in the code base to resolve

Hendiadyoin1 · 2024-09-10T08:27:10Z

AK/IpAddressCidr.h

I'd prefer CIDR

AK/IpAddressCidr.h

Hendiadyoin1 · 2024-09-10T08:36:06Z

AK/IpAddressCidr.h

+        auto address_string = TRY(m_address.to_string());
+
+#ifdef KERNEL
+        TRY(builder.try_append(address_string->view()));
+#else
+        TRY(builder.try_append(address_string));
+#endif
+
+        TRY(builder.try_append('/'));
+        TRY(builder.try_appendff("{}", m_length));


Ideally this would just be a

#ifdef KERNEL return KSting::formatted("{}/{}", m_address, m_length()); #else return Sting::try_formatted("{}/{}", m_address, m_length()); #endif

but we're likely missing a custom formatter, are we?
Note that fallibility in the Userland case is not enforced (anymore)

Just doing

#ifdef KERNEL ErrorOr<NonnullOwnPtr<Kernel::KString>> to_string() const { return KString::formatted("{}/{}", m_address, m_length); } #else ErrorOr<String> to_string() const { return String::formatted("{}/{}", m_address, m_length); } #endif

works is this case both for IPv4 and IPv6 in hosts and serenity tests. I'll adopt this for formatting.

AK/IpAddressCidr.h

Hendiadyoin1 · 2024-09-10T09:01:53Z

AK/IpAddressCidr.h

+template<>
+struct Formatter<IPv6AddressCidr> : Formatter<StringView> {
+    ErrorOr<void> format(FormatBuilder& builder, IPv6AddressCidr value)
+    {
+        return Formatter<StringView>::format(builder, TRY(value.to_string())->view());
+    }
+};
+#else
+template<>
+struct Formatter<IPv6AddressCidr> : Formatter<StringView> {
+    ErrorOr<void> format(FormatBuilder& builder, IPv6AddressCidr value)
+    {
+        return Formatter<StringView>::format(builder, TRY(value.to_string()));
+    }
+};


See the OG commit

What I meant with this, is that this could mirror the actual implementation of the CIDR to_string method,
maybe even replace it.

With some template shenanigans (Ie DerivedFrom<IpAddressCIDR>) all formatters could use the same code

Hendiadyoin1 · 2024-09-10T09:02:11Z

AK/IpAddressCidr.h

+template<>
+struct Formatter<IPv4AddressCidr> : Formatter<StringView> {
+    ErrorOr<void> format(FormatBuilder& builder, IPv4AddressCidr value)
+    {
+        return Formatter<StringView>::format(builder, TRY(value.to_string())->view());
+    }
+};
+#else
+template<>
+struct Formatter<IPv4AddressCidr> : Formatter<StringView> {
+    ErrorOr<void> format(FormatBuilder& builder, IPv4AddressCidr value)
+    {
+        return Formatter<StringView>::format(builder, TRY(value.to_string()));
+    }
+};


See OG commit

BuggieBot · 2024-09-10T13:49:43Z

Hello!

One or more of the commit messages in this PR do not match the SerenityOS code submission policy, please check the lint_commits CI job for more details on which commits were flagged and why.
Please do not close this PR and open another, instead modify your commit message(s) with git commit --amend and force push those changes to update this PR.

famfo · 2024-09-10T13:51:05Z

I will squash this again later when the code itself is fine

AK/IpAddressCidr.h

Tests/AK/TestIPv4AddressCidr.cpp

Tests/AK/TestIPv6Address.cpp

Tests/AK/TestIPv6AddressCidr.cpp

kleinesfilmroellchen

Only Leon's comment about string formatting needs to be resolved, I think we want to switch the implementation place and move the implementation into the Formatter, while to_string only calls String::formatted.

stale · 2024-11-05T03:30:23Z

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions!

famfo · 2024-11-07T13:34:51Z

I will pick this up again eventually, currently a bit short on time unfortunately.

github-actions bot added the 👀 pr-needs-review PR needs review from a maintainer or community member label Sep 9, 2024

kleinesfilmroellchen suggested changes Sep 9, 2024

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famfo added 3 commits September 10, 2024 00:59

AK: Add IPAddressCidr datatype

0ee7daa

AK/IpAddressCidr: Add IPv4AddressCidr

1103339

AK/IpAddressCidr: Add IPv6AddressCidr

695a66a

famfo force-pushed the IPAddressCidr branch from 3329767 to 695a66a Compare September 9, 2024 23:08

Hendiadyoin1 reviewed Sep 10, 2024

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famfo added 3 commits September 10, 2024 15:43

fixup! Base: use more auto, change fromatting

76bfe74

fixup! IPv4: move MAX_LENGTH to the top

bcf16e1

fixup! IPv6: move MAX_LENGTH to top, return IPv6Address explicitly

203e4bf

famfo added 2 commits September 11, 2024 01:17

fixup: Base: use release_value

b754b80

fixup: IPv6: use release_value

5b792e9

famfo marked this pull request as draft September 10, 2024 23:25

github-actions bot removed the 👀 pr-needs-review PR needs review from a maintainer or community member label Sep 10, 2024

famfo added 2 commits September 13, 2024 03:29

AK/IPv6Address: Add to and from u128 functions

074cf8a

fixup: IPv6: use u128 datatypes

06fea38

timschumi reviewed Sep 27, 2024

View reviewed changes

famfo added 5 commits September 27, 2024 23:53

fixup! Base class: implement formatter for IPAddressCidrError

21e6d63

fixup! IPv6AddressCidr: use TRY_OR_FAIL, use C++ casts

6350122

fixup! IPv4AddressCidr: use TRY_OR_FAIL, use C++ casts

9327500

fixup! TestIPv6Address: use C++ casts

7aa69d4

fixup! Base: clang-format

d1b9e2c

famfo force-pushed the IPAddressCidr branch from 28ead4b to d1b9e2c Compare September 27, 2024 22:17

AK/Error: Mark ErrorOr constructor as contexpr

12d20e4

famfo marked this pull request as ready for review September 28, 2024 22:20

github-actions bot added the 👀 pr-needs-review PR needs review from a maintainer or community member label Sep 28, 2024

kleinesfilmroellchen reviewed Oct 2, 2024

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stale bot added the stale label Nov 5, 2024

stale bot removed the stale label Nov 7, 2024

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AK: Introduce IPAddressCidr datatype #25006

AK: Introduce IPAddressCidr datatype #25006

famfo commented Sep 9, 2024

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AK: Introduce IPAddressCidr datatype #25006

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AK: Introduce IPAddressCidr datatype #25006

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