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AK: Validate compressed tags in IPv4-mapped IPv6 address

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This disallows parsing IPv4 mapped IPv6 address strings with multiple
compression prefixes.  Tests are provided for the updated
functionality.
This commit is contained in:
Grant Knowlton 2025-07-11 16:11:07 -04:00 • committed by Jelle Raaijmakers
parent cf355d48b1
commit 9e1e4f3b15
Notes: github-actions[bot] 2025-07-29 22:54:30 +00:00
2 changed files with 31 additions and 3 deletions
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7
Tests/AK/TestIPv6Address.cpp
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@ -103,7 +103,14 @@ TEST_CASE(ipv4_mapped_ipv6)
EXPECT_EQ(ipv4_address_to_map, mapped_address.ipv4_mapped_address().value());
EXPECT_EQ("::ffff:192.168.0.1"sv, MUST(mapped_address.to_string()));
EXPECT_EQ(IPv4Address(192, 168, 1, 9), IPv6Address::from_string("::FFFF:192.168.1.9"sv).value().ipv4_mapped_address().value());
EXPECT_EQ(IPv4Address(192, 168, 1, 7), IPv6Address::from_string("::0:0:ffff:192.168.1.7"sv).value().ipv4_mapped_address().value());
EXPECT_EQ(IPv4Address(192, 168, 2, 5), IPv6Address::from_string("0:0:0::ffff:192.168.2.5"sv).value().ipv4_mapped_address().value());
EXPECT(!IPv6Address::from_string("::abcd:192.168.1.9"sv).has_value());
EXPECT(!IPv6Address::from_string("::::ffff:192.168.1.9"sv).has_value());
EXPECT(!IPv6Address::from_string("ffff::ffff:192.168.1.9"sv).has_value());
EXPECT(!IPv6Address::from_string("0::0::ffff:192.168.1.9"sv).has_value());
EXPECT(!IPv6Address::from_string("::0::ffff:192.168.1.9"sv).has_value());
EXPECT(!IPv6Address::from_string(":0:ffff:192.168.1.9"sv).has_value());
}
TEST_CASE(should_make_empty_optional_from_bad_string)