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[dns] add Name::StripName() and support in-place ExtractLabels() (#10037)

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- Updates `Dns::Name::ExtractLabels()` for in-place label extraction,
  optimizing string operations.
- Introduces `Name::StripName()` to efficiently remove a suffix name
  from a DNS name in place.
- Updates and simplifies unit tests `test_dns` to validate new
  functionality.
This commit is contained in:
Abtin Keshavarzian
2024-04-17 15:21:16 -07:00
committed by GitHub
parent b6a1dc8fe8
commit be7d36e4ff
3 changed files with 94 additions and 64 deletions
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tests/unit/test_dns.cpp
+61 -63
View File
@@ -276,79 +276,77 @@ void TestDnsName(void)
printf("----------------------------------------------------------------\n");
printf("Extracting label(s) and removing domains:\n");
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = "default.service.arpa.";
SuccessOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name));
VerifyOrQuit(strcmp(name, "my-service._ipps._tcp") == 0);
{
struct TestCase
{
const char *mFullName;
const char *mSuffixName;
const char *mLabels;
};
fullName = "my-service._ipps._tcp.default.service.arpa";
suffixName = "default.service.arpa";
SuccessOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name));
VerifyOrQuit(strcmp(name, "my-service._ipps._tcp") == 0);
static const TestCase kTestCases[] = {
{"my-service._ipps._tcp.default.service.arpa.", "default.service.arpa.", "my-service._ipps._tcp"},
{"my-service._ipps._tcp.default.service.arpa", "default.service.arpa", "my-service._ipps._tcp"},
{"my.service._ipps._tcp.default.service.arpa.", "_ipps._tcp.default.service.arpa.", "my.service"},
{"my-service._ipps._tcp.default.service.arpa.", "DeFault.SerVice.ARPA.", "my-service._ipps._tcp"},
{"my-service._ipps._tcp.default.service.arpa", "DeFault.SerVice.ARPA", "my-service._ipps._tcp"},
fullName = "my-service._ipps._tcp.default.service.arpa";
suffixName = "default.service.arpa.";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name) == kErrorParse);
{"my-service._ipps._tcp.default.service.arpa", "default.service.arpa.", nullptr},
{"my-service._ipps._tcp.default.service.arpa.", "default.service.arpa", nullptr},
{"my-service._ipps._tcp.default.service.arpa.", "efault.service.arpa.", nullptr},
{"my-service._ipps._tcp.default.service.arpa", "efault.service.arpa", nullptr},
{"my-service._ipps._tcp.default.service.arpa.", "xdefault.service.arpa.", nullptr},
{"my-service._ipps._tcp.default.service.arpa.", ".default.service.arpa.", nullptr},
{"my-service._ipps._tcp.default.service.arpa.", "default.service.arp.", nullptr},
{"default.service.arpa.", "default.service.arpa.", nullptr},
{"default.service.arpa", "default.service.arpa", nullptr},
{"efault.service.arpa.", "default.service.arpa.", nullptr},
};
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = "default.service.arpa";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name) == kErrorParse);
for (const TestCase &testCase : kTestCases)
{
Error error;
fullName = "my.service._ipps._tcp.default.service.arpa.";
suffixName = "_ipps._tcp.default.service.arpa.";
SuccessOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name));
VerifyOrQuit(strcmp(name, "my.service") == 0);
printf("\n");
printf(" FullName : %s\n", testCase.mFullName);
printf(" SuffixName : %s\n", testCase.mSuffixName);
printf(" Extracted labels: %s\n", (testCase.mLabels != nullptr) ? testCase.mLabels : "(parse)");
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = "DeFault.SerVice.ARPA.";
SuccessOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name));
VerifyOrQuit(strcmp(name, "my-service._ipps._tcp") == 0);
error = Dns::Name::ExtractLabels(testCase.mFullName, testCase.mSuffixName, name);
fullName = "my-service._ipps._tcp.default.service.arpa";
suffixName = "DeFault.SerVice.ARPA";
SuccessOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name));
VerifyOrQuit(strcmp(name, "my-service._ipps._tcp") == 0);
if (testCase.mLabels != nullptr)
{
SuccessOrQuit(error);
VerifyOrQuit(strcmp(name, testCase.mLabels) == 0);
}
else
{
VerifyOrQuit(error == kErrorParse);
}
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = "efault.service.arpa.";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name) == kErrorParse);
strcpy(name, testCase.mFullName);
error = Dns::Name::StripName(name, testCase.mSuffixName);
fullName = "my-service._ipps._tcp.default.service.arpa";
suffixName = "efault.service.arpa";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name) == kErrorParse);
if (testCase.mLabels != nullptr)
{
SuccessOrQuit(error);
VerifyOrQuit(strcmp(name, testCase.mLabels) == 0);
}
else
{
VerifyOrQuit(error == kErrorParse);
}
}
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = "xdefault.service.arpa.";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name) == kErrorParse);
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = "default.service.arpa.";
SuccessOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name, 22));
VerifyOrQuit(strcmp(name, "my-service._ipps._tcp") == 0);
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = ".default.service.arpa.";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name) == kErrorParse);
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = "default.service.arp.";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name) == kErrorParse);
fullName = "default.service.arpa.";
suffixName = "default.service.arpa.";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name) == kErrorParse);
fullName = "default.service.arpa";
suffixName = "default.service.arpa";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name) == kErrorParse);
fullName = "efault.service.arpa.";
suffixName = "default.service.arpa.";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name) == kErrorParse);
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = "default.service.arpa.";
SuccessOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name, 22));
VerifyOrQuit(strcmp(name, "my-service._ipps._tcp") == 0);
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = "default.service.arpa.";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name, 21) == kErrorNoBufs);
fullName = "my-service._ipps._tcp.default.service.arpa.";
suffixName = "default.service.arpa.";
VerifyOrQuit(Dns::Name::ExtractLabels(fullName, suffixName, name, 21) == kErrorNoBufs);
}
printf("----------------------------------------------------------------\n");
printf("Append names, check encoded bytes, parse name and read labels:\n");