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// Copyright (C) 2014-2015 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 <util/unittests/wiredata.h>
#include <dns/exceptions.h>
#include <dns/rdata.h>
#include <dns/rdata/generic/detail/char_string.h>
#include <util/buffer.h>
#include <gtest/gtest.h>
#include <string>
#include <vector>
using namespace isc::dns;
using namespace isc::dns::rdata;
using isc::dns::rdata::generic::detail::CharStringData;
using isc::dns::rdata::generic::detail::stringToCharStringData;
using isc::dns::rdata::generic::detail::charStringDataToString;
using isc::dns::rdata::generic::detail::compareCharStringDatas;
using isc::util::unittests::matchWireData;
namespace {
const uint8_t test_charstr[] = {
'T', 'e', 's', 't', ' ', 'S', 't', 'r', 'i', 'n', 'g'
};
class CharStringDataTest : public ::testing::Test {
protected:
CharStringDataTest() :
// char-string representation for test data using two types of escape
// ('r' = 114)
test_str("Test\\ St\\114ing")
{
str_region.beg = &test_str[0];
str_region.len = test_str.size();
}
CharStringData chstr; // place holder
const std::string test_str;
MasterToken::StringRegion str_region;
};
MasterToken::StringRegion
createStringRegion(const std::string& str) {
MasterToken::StringRegion region;
region.beg = &str[0]; // note std ensures this works even if str is empty
region.len = str.size();
return (region);
}
TEST_F(CharStringDataTest, normalConversion) {
uint8_t tmp[3]; // placeholder for expected sequence
stringToCharStringData(str_region, chstr);
matchWireData(test_charstr, sizeof(test_charstr), &chstr[0], chstr.size());
// Empty string
chstr.clear();
stringToCharStringData(createStringRegion(""), chstr);
EXPECT_TRUE(chstr.empty());
// Possible largest char string
chstr.clear();
std::string long_str(255, 'x');
stringToCharStringData(createStringRegion(long_str), chstr);
std::vector<uint8_t> expected;
expected.insert(expected.end(), long_str.begin(), long_str.end());
matchWireData(&expected[0], expected.size(), &chstr[0], chstr.size());
// Escaped '\'
chstr.clear();
tmp[0] = '\\';
stringToCharStringData(createStringRegion("\\\\"), chstr);
matchWireData(tmp, 1, &chstr[0], chstr.size());
// Boundary values for \DDD
chstr.clear();
tmp[0] = 0;
stringToCharStringData(createStringRegion("\\000"), chstr);
matchWireData(tmp, 1, &chstr[0], chstr.size());
chstr.clear();
stringToCharStringData(createStringRegion("\\255"), chstr);
tmp[0] = 255;
matchWireData(tmp, 1, &chstr[0], chstr.size());
// Another digit follows DDD; it shouldn't cause confusion
chstr.clear();
stringToCharStringData(createStringRegion("\\2550"), chstr);
tmp[1] = '0';
matchWireData(tmp, 2, &chstr[0], chstr.size());
}
TEST_F(CharStringDataTest, badConversion) {
// input string ending with (non escaped) '\'
chstr.clear();
EXPECT_THROW(stringToCharStringData(createStringRegion("foo\\"), chstr),
InvalidRdataText);
}
TEST_F(CharStringDataTest, badDDD) {
// Check various type of bad form of \DDD
// Not a number
EXPECT_THROW(stringToCharStringData(createStringRegion("\\1a2"), chstr),
InvalidRdataText);
EXPECT_THROW(stringToCharStringData(createStringRegion("\\12a"), chstr),
InvalidRdataText);
// Not in the range of uint8_t
EXPECT_THROW(stringToCharStringData(createStringRegion("\\256"), chstr),
InvalidRdataText);
// Short buffer
EXPECT_THROW(stringToCharStringData(createStringRegion("\\42"), chstr),
InvalidRdataText);
}
const struct TestData {
const char *data;
const char *expected;
} conversion_data[] = {
{"Test\"Test", "Test\\\"Test"},
{"Test;Test", "Test\\;Test"},
{"Test\\Test", "Test\\\\Test"},
{"Test\x1fTest", "Test\\031Test"},
{"Test ~ Test", "Test ~ Test"},
{"Test\x7fTest", "Test\\127Test"},
{NULL, NULL}
};
TEST_F(CharStringDataTest, charStringDataToString) {
for (const TestData* cur = conversion_data; cur->data != NULL; ++cur) {
uint8_t idata[32];
size_t length = std::strlen(cur->data);
ASSERT_LT(length, sizeof(idata));
std::memcpy(idata, cur->data, length);
const CharStringData test_data(idata, idata + length);
EXPECT_EQ(cur->expected, charStringDataToString(test_data));
}
}
TEST_F(CharStringDataTest, compareCharStringData) {
CharStringData charstr;
CharStringData charstr2;
CharStringData charstr_small1;
CharStringData charstr_small2;
CharStringData charstr_large1;
CharStringData charstr_large2;
CharStringData charstr_empty;
stringToCharStringData(createStringRegion("test string"), charstr);
stringToCharStringData(createStringRegion("test string"), charstr2);
stringToCharStringData(createStringRegion("test strin"), charstr_small1);
stringToCharStringData(createStringRegion("test strina"), charstr_small2);
stringToCharStringData(createStringRegion("test stringa"), charstr_large1);
stringToCharStringData(createStringRegion("test strinz"), charstr_large2);
EXPECT_EQ(0, compareCharStringDatas(charstr, charstr2));
EXPECT_EQ(0, compareCharStringDatas(charstr2, charstr));
EXPECT_EQ(1, compareCharStringDatas(charstr, charstr_small1));
EXPECT_EQ(1, compareCharStringDatas(charstr, charstr_small2));
EXPECT_EQ(-1, compareCharStringDatas(charstr, charstr_large1));
EXPECT_EQ(-1, compareCharStringDatas(charstr, charstr_large2));
EXPECT_EQ(-1, compareCharStringDatas(charstr_small1, charstr));
EXPECT_EQ(-1, compareCharStringDatas(charstr_small2, charstr));
EXPECT_EQ(1, compareCharStringDatas(charstr_large1, charstr));
EXPECT_EQ(1, compareCharStringDatas(charstr_large2, charstr));
EXPECT_EQ(-1, compareCharStringDatas(charstr_empty, charstr));
EXPECT_EQ(1, compareCharStringDatas(charstr, charstr_empty));
EXPECT_EQ(0, compareCharStringDatas(charstr_empty, charstr_empty));
}
} // unnamed namespace
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