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[ip6-address] add SetFromTranslatedIp4Address() for NAT64 (#6353)

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This commit adds `Ip6::Address::SetFromTranslatedIp4Address()` method
performing NAT64 address translation from an IPv4 address and a NAT64
prefix to construct a corresponding IPv6 address as specified in RFC
6052. This commit also updates the unit test `test_ip6_address.cpp` to
cover the behavior of the newly added method.
This commit is contained in:
Abtin Keshavarzian
2021-03-29 16:20:42 -07:00
committed by GitHub
parent 4fb42e245b
commit 2e61433825
3 changed files with 114 additions and 0 deletions
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tests/unit/test_ip_address.cpp
+51
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@@ -359,6 +359,56 @@ void TestIp6Prefix(void)
}
}
void TestIp4Ip6Translation(void)
{
struct TestCase
{
const char *mPrefix; // NAT64 prefix
uint8_t mLength; // Prefix length in bits
const char *mIp6Address; // Expected IPv6 address (with embedded IPv4 "192.0.2.33").
};
// The test cases are from RFC 6502 - section 2.4
const TestCase kTestCases[] = {
{"2001:db8::", 32, "2001:db8:c000:221::"},
{"2001:db8:100::", 40, "2001:db8:1c0:2:21::"},
{"2001:db8:122::", 48, "2001:db8:122:c000:2:2100::"},
{"2001:db8:122:300::", 56, "2001:db8:122:3c0:0:221::"},
{"2001:db8:122:344::", 64, "2001:db8:122:344:c0:2:2100::"},
{"2001:db8:122:344::", 96, "2001:db8:122:344::192.0.2.33"},
{"64:ff9b::", 96, "64:ff9b::192.0.2.33"},
};
const uint8_t kIp4Address[] = {192, 0, 2, 33};
ot::Ip4::Address ip4Address;
printf("\nTestIp4Ip6Translation()\n");
ip4Address.SetBytes(kIp4Address);
for (const TestCase &testCase : kTestCases)
{
ot::Ip6::Prefix prefix;
ot::Ip6::Address address;
ot::Ip6::Address expectedAddress;
SuccessOrQuit(address.FromString(testCase.mPrefix), "Ip6::FromString() failed");
prefix.Set(address.GetBytes(), testCase.mLength);
SuccessOrQuit(expectedAddress.FromString(testCase.mIp6Address), "Ip6::FromString() failed");
address.SetFromTranslatedIp4Address(prefix, ip4Address);
printf("Prefix: %-26s IPv4Addr: %-12s Ipv6Address: %-36s Expected: %s (%s)\n", prefix.ToString().AsCString(),
ip4Address.ToString().AsCString(), address.ToString().AsCString(), testCase.mIp6Address,
expectedAddress.ToString().AsCString());
VerifyOrQuit(address == expectedAddress, "Ip6::SetFromTranslatedIp4Address() failed");
}
}
void TestIp6Header(void)
{
ot::Ip6::Header header;
@@ -420,6 +470,7 @@ int main(void)
TestIp4AddressFromString();
TestIp6AddressFromString();
TestIp6Prefix();
TestIp4Ip6Translation();
TestIp6Header();
printf("All tests passed\n");
return 0;