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// Copyright (C) 2009 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
#include <vector>
#include <util/buffer.h>
#include <dns/name.h>
#include <dns/messagerenderer.h>
#include <dns/tests/unittest_util.h>
#include <gtest/gtest.h>
using isc::UnitTestUtil;
using isc::dns::Name;
using isc::dns::MessageRenderer;
using isc::util::OutputBuffer;
namespace {
class MessageRendererTest : public ::testing::Test {
protected:
MessageRendererTest() : expected_size(0), buffer(0), renderer(buffer)
{
data16 = (2 << 8) | 3;
data32 = (4 << 24) | (5 << 16) | (6 << 8) | 7;
}
size_t expected_size;
uint16_t data16;
uint32_t data32;
OutputBuffer buffer;
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, writeIntger) {
renderer.writeUint16(data16);
expected_size += sizeof(data16);
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, renderer.getData(),
renderer.getLength(), &testdata[1], sizeof(data16));
}
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."));
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, buffer.getData(),
buffer.getLength(), &data[0], data.size());
}
TEST_F(MessageRendererTest, writeNameInLargeBuffer) {
size_t offset = 0x3fff;
buffer.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."));
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData,
static_cast<const uint8_t*>(buffer.getData()) + offset,
buffer.getLength() - offset,
&data[0], data.size());
}
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."));
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, buffer.getData(),
buffer.getLength(), &data[0], data.size());
}
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."));
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, buffer.getData(),
buffer.getLength(), &data[0], data.size());
}
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."));
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, buffer.getData(),
buffer.getLength(), &data[0], data.size());
}
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."));
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, buffer.getData(),
buffer.getLength(), &data[0], data.size());
}
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 an
// unusual operation and is unlikely to happen in practice, but is still
// allowed in this API.
renderer.setCompressMode(MessageRenderer::CASE_INSENSITIVE);
renderer.writeName(Name("c.b.EXAMPLE.com."));
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, buffer.getData(),
buffer.getLength(), &data[0], data.size());
}
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);
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData,
static_cast<const uint8_t*>(buffer.getData()),
buffer.getLength(),
static_cast<const uint8_t*>(expected.getData()),
expected.getLength());
}
}
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