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[ip6] add method for creating/parsing IPv4-mapped IPv6 address (#9799)

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The IPv4-mapped IPv6 address is useful in certain platform/public
APIs where we need to support both IPv6 or IPv4 address. We can
use IPv4-mapped IPv6 address to represent an IPv4 address. This
commit adds simple helper functions to validate, create and
parse such addresses.
This commit is contained in:
Abtin Keshavarzian
2024-01-25 15:14:58 -08:00
committed by GitHub
parent 81106dff88
commit dacdc7d36f
8 changed files with 129 additions and 1 deletions
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tests/unit/test_ip_address.cpp
+39
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@@ -758,6 +758,44 @@ void TestIp6PrefixTidy(void)
}
}
void TestIp4MappedIp6Address(void)
{
const uint8_t kIp4Address[] = {192, 0, 2, 33};
const char *kInvalidIp4MappedFormats[] = {
"8000::ffff:192.0.2.23", "0:400::ffff:192.0.2.23", "0:0:1::ffff:192.0.2.23", "0:0:0:4:0:ffff:192.0.2.23",
"0:0:0:0:1:ffff:192.0.2.23", "::fffe:192.0.2.23", "::efff:192.0.2.23",
};
Ip4::Address expectedIp4Address;
Ip4::Address ip4Address;
Ip6::Address expectedIp6Address;
Ip6::Address ip6Address;
printf("\nTestIp4MappedIp6Address()\n");
expectedIp4Address.SetBytes(kIp4Address);
SuccessOrQuit(expectedIp6Address.FromString("::ffff:192.0.2.33"));
ip6Address.SetToIp4Mapped(expectedIp4Address);
printf("IPv4-mapped IPv6 address: %s\n", ip6Address.ToString().AsCString());
VerifyOrQuit(ip6Address.IsIp4Mapped());
VerifyOrQuit(ip6Address == expectedIp6Address);
SuccessOrQuit(ip4Address.ExtractFromIp4MappedIp6Address(ip6Address));
VerifyOrQuit(ip4Address == expectedIp4Address);
for (const char *invalidIp4MappedAddr : kInvalidIp4MappedFormats)
{
SuccessOrQuit(ip6Address.FromString(invalidIp4MappedAddr));
printf("Invalid IPv4-mapped IPv6 address: %s -> %s\n", invalidIp4MappedAddr, ip6Address.ToString().AsCString());
VerifyOrQuit(!ip6Address.IsIp4Mapped());
VerifyOrQuit(ip4Address.ExtractFromIp4MappedIp6Address(ip6Address) != kErrorNone);
}
}
void TestIp4Ip6Translation(void)
{
struct TestCase
@@ -884,6 +922,7 @@ int main(void)
ot::TestIp6PrefixFromString();
ot::TestIp6Prefix();
ot::TestIp6PrefixTidy();
ot::TestIp4MappedIp6Address();
ot::TestIp4Ip6Translation();
ot::TestIp4Cidr();
ot::TestIp4CidrFromString();