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292 | // Copyright (C) 2009-2024 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <config.h>
#include <exceptions/exceptions.h>
#include <util/buffer.h>
#include <dns/name.h>
#include <dns/labelsequence.h>
#include <dns/messagerenderer.h>
#include <dns/tests/unittest_util.h>
#include <util/unittests/wiredata.h>
#include <gtest/gtest.h><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <boost/lexical_cast.hpp><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <string><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <vector><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
using isc::UnitTestUtil;
using isc::dns::Name;
using isc::dns::LabelSequence;
using isc::dns::MessageRenderer;
using isc::util::OutputBuffer;
using boost::lexical_cast;
using isc::util::unittests::matchWireData;
namespace {
class MessageRendererTest : public ::testing::Test {
protected:
MessageRendererTest() : expected_size(0) {
data16 = (2 << 8) | 3;
data32 = (4 << 24) | (5 << 16) | (6 << 8) | 7;
}
size_t expected_size;
uint16_t data16;
uint32_t data32;
MessageRenderer renderer;
std::vector<unsigned char> data;
static const uint8_t testdata[5];
};
const uint8_t MessageRendererTest::testdata[5] = {1, 2, 3, 4, 5};
// The test cases are borrowed from those for the OutputBuffer class.
TEST_F(MessageRendererTest, writeInteger) {<--- syntax error
renderer.writeUint16(data16);
expected_size += sizeof(data16);
matchWireData(&testdata[1], sizeof(data16),
renderer.getData(), renderer.getLength());
}
TEST_F(MessageRendererTest, writeName) {
UnitTestUtil::readWireData("name_toWire1", data);
renderer.writeName(Name("a.example.com."));
renderer.writeName(Name("b.example.com."));
renderer.writeName(Name("a.example.org."));
matchWireData(&data[0], data.size(),
renderer.getData(), renderer.getLength());
}
TEST_F(MessageRendererTest, writeNameInLargeBuffer) {
size_t offset = 0x3fff;
renderer.skip(offset);
UnitTestUtil::readWireData("name_toWire2", data);
renderer.writeName(Name("a.example.com."));
renderer.writeName(Name("a.example.com."));
renderer.writeName(Name("b.example.com."));
matchWireData(&data[0], data.size(),
static_cast<const uint8_t*>(renderer.getData()) + offset,
renderer.getLength() - offset);
}
TEST_F(MessageRendererTest, writeNameWithUncompressed) {
UnitTestUtil::readWireData("name_toWire3", data);
renderer.writeName(Name("a.example.com."));
renderer.writeName(Name("b.example.com."), false);
renderer.writeName(Name("b.example.com."));
matchWireData(&data[0], data.size(),
renderer.getData(), renderer.getLength());
}
TEST_F(MessageRendererTest, writeNamePointerChain) {
UnitTestUtil::readWireData("name_toWire4", data);
renderer.writeName(Name("a.example.com."));
renderer.writeName(Name("b.example.com."));
renderer.writeName(Name("b.example.com."));
matchWireData(&data[0], data.size(),
renderer.getData(), renderer.getLength());
}
TEST_F(MessageRendererTest, compressMode) {
// By default the render performs case insensitive compression.
EXPECT_EQ(MessageRenderer::CASE_INSENSITIVE, renderer.getCompressMode());
// The mode can be explicitly changed.
renderer.setCompressMode(MessageRenderer::CASE_SENSITIVE);
EXPECT_EQ(MessageRenderer::CASE_SENSITIVE, renderer.getCompressMode());
renderer.setCompressMode(MessageRenderer::CASE_INSENSITIVE);
EXPECT_EQ(MessageRenderer::CASE_INSENSITIVE, renderer.getCompressMode());
// The clear() method resets the mode to the default.
renderer.setCompressMode(MessageRenderer::CASE_SENSITIVE);
renderer.clear();
EXPECT_EQ(MessageRenderer::CASE_INSENSITIVE, renderer.getCompressMode());
}
TEST_F(MessageRendererTest, writeNameCaseCompress) {
// By default MessageRenderer performs case insensitive compression.
UnitTestUtil::readWireData("name_toWire1", data);
renderer.writeName(Name("a.example.com."));
// this should match the first name in terms of compression:
renderer.writeName(Name("b.exAmple.CoM."));
renderer.writeName(Name("a.example.org."));
matchWireData(&data[0], data.size(),
renderer.getData(), renderer.getLength());
}
TEST_F(MessageRendererTest, writeNameCaseSensitiveCompress) {
// name compression in case sensitive manner. See the data file
// description for details.
renderer.setCompressMode(MessageRenderer::CASE_SENSITIVE);
UnitTestUtil::readWireData("name_toWire5.wire", data);
renderer.writeName(Name("a.example.com."));
renderer.writeName(Name("b.eXample.com."));
renderer.writeName(Name("c.eXample.com."));
matchWireData(&data[0], data.size(),
renderer.getData(), renderer.getLength());
}
TEST_F(MessageRendererTest, writeNameMixedCaseCompress) {
renderer.setCompressMode(MessageRenderer::CASE_SENSITIVE);
UnitTestUtil::readWireData("name_toWire6.wire", data);
renderer.writeName(Name("a.example.com."));
renderer.writeName(Name("b.eXample.com."));
// Change the compression mode in the middle of rendering. This is not
// allowed in this implementation.
EXPECT_THROW(renderer.setCompressMode(MessageRenderer::CASE_INSENSITIVE),
isc::InvalidParameter);
// Once the renderer is cleared, it's okay again.
renderer.clear();
EXPECT_NO_THROW(renderer.setCompressMode(
MessageRenderer::CASE_INSENSITIVE));
}
TEST_F(MessageRendererTest, writeRootName) {
// root name is special: it never causes compression or can (reasonably)
// be a compression pointer. So it makes sense to check this case
// explicitly.
Name example_name = Name("www.example.com");
OutputBuffer expected(0);
expected.writeUint8(0); // root name
example_name.toWire(expected);
renderer.writeName(Name("."));
renderer.writeName(example_name);
matchWireData(static_cast<const uint8_t*>(expected.getData()),
expected.getLength(),
static_cast<const uint8_t*>(renderer.getData()),
renderer.getLength());
}
TEST_F(MessageRendererTest, writeNameLabelSequence1) {
UnitTestUtil::readWireData("name_toWire7", data);
Name n1("a.example.com");
LabelSequence ls1(n1);
// a.example.com.
renderer.writeName(ls1);
ls1.stripLeft(1);
// example.com.
renderer.writeName(ls1);
matchWireData(&data[0], data.size(),
renderer.getData(), renderer.getLength());
}
TEST_F(MessageRendererTest, writeNameLabelSequence2) {
UnitTestUtil::readWireData("name_toWire8", data);
Name n1("a.example.com");
LabelSequence ls1(n1);
ls1.stripRight(1);
// a.example.com (without root .)
renderer.writeName(ls1);
matchWireData(&data[0], data.size(),
renderer.getData(), renderer.getLength());
}
TEST_F(MessageRendererTest, writeNameLabelSequence3) {
UnitTestUtil::readWireData("name_toWire9", data);
Name n1("a.example.com");
LabelSequence ls1(n1);
// a.example.com.
renderer.writeName(ls1);
ls1.stripRight(1);
// a.example.com (without root .)
renderer.writeName(ls1);
ls1.stripRight(1);
// a.example
renderer.writeName(ls1);
ls1.stripLeft(1);
// example
renderer.writeName(ls1);
matchWireData(&data[0], data.size(),
renderer.getData(), renderer.getLength());
}
TEST_F(MessageRendererTest, setBuffer) {
OutputBuffer new_buffer(0);
renderer.setBuffer(&new_buffer);
EXPECT_EQ(0, new_buffer.getLength()); // the buffer should be still empty
renderer.writeUint32(42);
EXPECT_EQ(sizeof(uint32_t), new_buffer.getLength());
EXPECT_EQ(sizeof(uint32_t), renderer.getLength());
// Change some other internal state for the reset test below.
EXPECT_EQ(512, renderer.getLengthLimit());
renderer.setLengthLimit(4096);
EXPECT_EQ(4096, renderer.getLengthLimit());
// Reset the buffer to the default again. Other internal states and
// resources should be cleared. The used buffer should be intact.
renderer.setBuffer(0);
EXPECT_EQ(sizeof(uint32_t), new_buffer.getLength());
EXPECT_EQ(0, renderer.getLength());
EXPECT_EQ(512, renderer.getLengthLimit());
}
TEST_F(MessageRendererTest, setBufferErrors) {
OutputBuffer new_buffer(0);
// Buffer cannot be reset when the renderer is in use.
renderer.writeUint32(10);
EXPECT_THROW(renderer.setBuffer(&new_buffer), isc::InvalidParameter);
renderer.clear();
renderer.setBuffer(&new_buffer);
renderer.writeUint32(10);
EXPECT_THROW(renderer.setBuffer(&new_buffer), isc::InvalidParameter);
// Resetting the buffer isn't allowed for the default buffer.
renderer.setBuffer(0);
EXPECT_THROW(renderer.setBuffer(0), isc::InvalidParameter);
// It's okay to reset a temporary buffer without using it.
renderer.setBuffer(&new_buffer);
EXPECT_NO_THROW(renderer.setBuffer(0));
}
TEST_F(MessageRendererTest, manyRRs) {
// Render a large number of names, and the confirm the resulting wire
// data store the expected names in the correct order (1000 is an
// arbitrary choice).
for (size_t i = 0; i < 1000; ++i) {
renderer.writeName(Name(lexical_cast<std::string>(i) + ".example"));
}
isc::util::InputBuffer b(renderer.getData(), renderer.getLength());
for (size_t i = 0; i < 1000; ++i) {
EXPECT_EQ(Name(lexical_cast<std::string>(i) + ".example"), Name(b));
}
// This will trigger trimming excessive hash items. It shouldn't cause
// any disruption.
EXPECT_NO_THROW(renderer.clear());
}
}
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