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LibDNS: Immediately resolve IPv4/IPv6 "hostnames" if A/AAAA is queried

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This makes e.g. lookup(192.168.1.1, A) resolve to the IP instead of
querying DNS for the IP.
This commit is contained in:
Ali Mohammad Pur 2024-11-20 13:40:52 +01:00 committed by Ali Mohammad Pur
parent c5afe58540
commit 63a5717bc7
1 changed files with 18 additions and 0 deletions
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18
Libraries/LibDNS/Resolver.h
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@ -208,6 +208,24 @@ public:
auto promise = Core::Promise<NonnullRefPtr<LookupResult const>>::construct();
if (auto maybe_ipv4 = IPv4Address::from_string(name); maybe_ipv4.has_value()) {
if (desired_types.contains_slow(Messages::ResourceType::A)) {
auto result = make_ref_counted<LookupResult>(Messages::DomainName {});
result->add_record({ .name = {}, .type = Messages::ResourceType::A, .class_ = Messages::Class::IN, .ttl = 0, .record = Messages::Records::A { maybe_ipv4.release_value() }, .raw = {} });
promise->resolve(move(result));
return promise;
}
}
if (auto maybe_ipv6 = IPv6Address::from_string(name); maybe_ipv6.has_value()) {
if (desired_types.contains_slow(Messages::ResourceType::AAAA)) {
auto result = make_ref_counted<LookupResult>(Messages::DomainName {});
result->add_record({ .name = {}, .type = Messages::ResourceType::AAAA, .class_ = Messages::Class::IN, .ttl = 0, .record = Messages::Records::AAAA { maybe_ipv6.release_value() }, .raw = {} });
promise->resolve(move(result));
return promise;
}
}
if (auto result = lookup_in_cache(name, class_, desired_types)) {
promise->resolve(result.release_nonnull());
return promise;