diff --git a/src/seeder/test/seeder_tests.cpp b/src/seeder/test/seeder_tests.cpp --- a/src/seeder/test/seeder_tests.cpp +++ b/src/seeder/test/seeder_tests.cpp @@ -4,12 +4,126 @@ #define BOOST_TEST_MODULE Bitcoin Seeder Test Suite +#include + +#include +#include +#include + #include BOOST_AUTO_TEST_SUITE(seeder_tests) -BOOST_AUTO_TEST_CASE(test_stub) { - BOOST_CHECK_EQUAL(true, true); +static const int QUERY_NAME_BUFFER_LENGTH = 256; +static const int QUERY_TYPE_SIZE = 2; +static const int QUERY_CLASS_SIZE = 2; +static const uint16_t QUERY_CLASS_IN = 1; +static const uint16_t QUERY_TYPE_A = 1; +static const uint8_t END_OF_NAME_FIELD = 0; +static const size_t MAX_LABEL_LENGTH = 63; + +std::vector CreateDNSQuestion(const std::string &queryName) { + std::vector queryhex; + + // Build the DNS message question section + size_t i = 0; + size_t lastPeriod = 0; + while (i < queryName.size()) { + if (queryName[i] == '.') { + uint8_t labelLength = i - lastPeriod; + queryhex.push_back(labelLength); + while (lastPeriod < i) { + queryhex.push_back(queryName[lastPeriod]); + lastPeriod++; + } + lastPeriod = i + 1; + } + i++; + } + uint8_t labelLength = i - lastPeriod; + queryhex.push_back(labelLength); + while (lastPeriod < i) { + queryhex.push_back(queryName[lastPeriod]); + lastPeriod++; + } + queryhex.push_back(END_OF_NAME_FIELD); + queryhex.push_back(QUERY_TYPE_A); + queryhex.push_back(QUERY_CLASS_IN); + + return queryhex; +} + +BOOST_AUTO_TEST_CASE(parse_name_happy_path) { + const std::string messageQueryName = "www.mydomain.com"; + std::vector dnsMessage = CreateDNSQuestion(messageQueryName); + std::array queryName; + queryName.fill(0); + const uint8_t *messageBegin = dnsMessage.data(); + // +1 for the last octet ending the field name + const size_t messageEndIndex = + messageQueryName.size() + 1 + QUERY_TYPE_SIZE + QUERY_CLASS_SIZE; + + int ret = parse_name(&messageBegin, messageBegin + messageEndIndex, + dnsMessage.data(), queryName.data(), + QUERY_NAME_BUFFER_LENGTH); + + BOOST_CHECK_EQUAL(ret, 0); + BOOST_CHECK_EQUAL(queryName.data(), messageQueryName); +} + +// Test for insufficient output buffer size +BOOST_AUTO_TEST_CASE(parse_name_insufficient_output_buffer_size) { + const std::string messageQueryName = "www.mydomain.com"; + std::vector dnsMessage = CreateDNSQuestion(messageQueryName); + std::array queryName; + queryName.fill(0); + const uint8_t *messageBegin = dnsMessage.data(); + // +1 for the last octet ending the field name + const size_t messageEndIndex = + messageQueryName.size() + 1 + QUERY_TYPE_SIZE + QUERY_CLASS_SIZE; + + // The size of the buffer being written to is 1 octect too small + int ret = parse_name(&messageBegin, messageBegin + messageEndIndex, + dnsMessage.data(), queryName.data(), + messageQueryName.size()); + BOOST_CHECK_EQUAL(ret, -2); + BOOST_CHECK_EQUAL(queryName.data(), + messageQueryName.substr(0, messageQueryName.size() - 1)); +} + +// Test for premature end of input buffer +BOOST_AUTO_TEST_CASE(parse_name_premature_end_of_input_buffer) { + const std::string messageQueryName = "www.mydomain.com"; + std::vector dnsMessage = CreateDNSQuestion(messageQueryName); + std::array queryName; + queryName.fill(0); + const uint8_t *messageBegin = dnsMessage.data(); + // The end index pointer for the DNS message buffer passed is located two + // octets away from the beginning + int ret = parse_name(&messageBegin, messageBegin + 2, dnsMessage.data(), + queryName.data(), QUERY_NAME_BUFFER_LENGTH); + BOOST_CHECK_EQUAL(ret, -1); + BOOST_CHECK_EQUAL(queryName.data(), messageQueryName.substr(0, 1)); +} + +// Test for when name field is too long +BOOST_AUTO_TEST_CASE(parse_name_field_name_too_long) { + std::string tooLongQName = "www."; + for (size_t i = 0; i < MAX_LABEL_LENGTH + 1; i++) { + tooLongQName += 'a'; + } + tooLongQName += ".com"; + std::vector dnsMessage = CreateDNSQuestion(tooLongQName); + std::array queryName; + queryName.fill(0); + const uint8_t *messageBegin = dnsMessage.data(); + size_t messageEndIndex = + tooLongQName.size() + 1 + QUERY_TYPE_SIZE + QUERY_CLASS_SIZE; + int ret = parse_name(&messageBegin, messageBegin + messageEndIndex, + dnsMessage.data(), queryName.data(), + QUERY_NAME_BUFFER_LENGTH); + BOOST_CHECK_EQUAL(ret, -1); + BOOST_CHECK_EQUAL(queryName.data(), tooLongQName.substr(0, 4)); } BOOST_AUTO_TEST_SUITE_END()