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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 11:36:04 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 11:36:04 +0000
commit040eee1aa49b49df4698d83a05af57c220127fd1 (patch)
treef635435954e6ccde5eee9893889e24f30ca68346 /src/lib/mysql
parentInitial commit. (diff)
downloadisc-kea-upstream.tar.xz
isc-kea-upstream.zip
Adding upstream version 2.2.0.upstream/2.2.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/lib/mysql')
-rw-r--r--src/lib/mysql/Makefile.am32
-rw-r--r--src/lib/mysql/Makefile.in936
-rw-r--r--src/lib/mysql/mysql_binding.cc349
-rw-r--r--src/lib/mysql/mysql_binding.h671
-rw-r--r--src/lib/mysql/mysql_connection.cc521
-rw-r--r--src/lib/mysql/mysql_connection.h760
-rw-r--r--src/lib/mysql/mysql_constants.h64
-rw-r--r--src/lib/mysql/tests/Makefile.am40
-rw-r--r--src/lib/mysql/tests/Makefile.in1006
-rw-r--r--src/lib/mysql/tests/mysql_binding_unittest.cc249
-rw-r--r--src/lib/mysql/tests/mysql_connection_unittest.cc789
-rw-r--r--src/lib/mysql/tests/run_unittests.cc20
-rw-r--r--src/lib/mysql/testutils/Makefile.am23
-rw-r--r--src/lib/mysql/testutils/Makefile.in837
-rw-r--r--src/lib/mysql/testutils/mysql_schema.cc163
-rw-r--r--src/lib/mysql/testutils/mysql_schema.h123
16 files changed, 6583 insertions, 0 deletions
diff --git a/src/lib/mysql/Makefile.am b/src/lib/mysql/Makefile.am
new file mode 100644
index 0000000..5ea9782
--- /dev/null
+++ b/src/lib/mysql/Makefile.am
@@ -0,0 +1,32 @@
+SUBDIRS = . testutils tests
+
+AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib
+AM_CPPFLAGS += $(BOOST_INCLUDES) $(MYSQL_CPPFLAGS)
+
+AM_CXXFLAGS = $(KEA_CXXFLAGS)
+
+CLEANFILES = *.gcno *.gcda
+
+lib_LTLIBRARIES = libkea-mysql.la
+libkea_mysql_la_SOURCES = mysql_connection.cc mysql_connection.h
+libkea_mysql_la_SOURCES += mysql_binding.cc mysql_binding.h
+libkea_mysql_la_SOURCES += mysql_constants.h
+
+libkea_mysql_la_LIBADD = $(top_builddir)/src/lib/database/libkea-database.la
+libkea_mysql_la_LIBADD += $(top_builddir)/src/lib/cc/libkea-cc.la
+libkea_mysql_la_LIBADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la
+libkea_mysql_la_LIBADD += $(top_builddir)/src/lib/log/libkea-log.la
+libkea_mysql_la_LIBADD += $(top_builddir)/src/lib/util/libkea-util.la
+libkea_mysql_la_LIBADD += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
+libkea_mysql_la_LIBADD += $(LOG4CPLUS_LIBS) $(BOOST_LIBS)
+
+libkea_mysql_la_LDFLAGS = -no-undefined -version-info 38:0:0
+
+libkea_mysql_la_LDFLAGS += $(MYSQL_LIBS)
+
+# Specify the headers for copying into the installation directory tree.
+libkea_mysql_includedir = $(pkgincludedir)/mysql
+libkea_mysql_include_HEADERS = \
+ mysql_binding.h \
+ mysql_connection.h \
+ mysql_constants.h
diff --git a/src/lib/mysql/Makefile.in b/src/lib/mysql/Makefile.in
new file mode 100644
index 0000000..e308b36
--- /dev/null
+++ b/src/lib/mysql/Makefile.in
@@ -0,0 +1,936 @@
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diff --git a/src/lib/mysql/mysql_binding.cc b/src/lib/mysql/mysql_binding.cc
new file mode 100644
index 0000000..67ad95d
--- /dev/null
+++ b/src/lib/mysql/mysql_binding.cc
@@ -0,0 +1,349 @@
+// Copyright (C) 2018-2022 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 <asiolink/io_address.h>
+#include <exceptions/exceptions.h>
+#include <boost/date_time/gregorian/gregorian.hpp>
+#include <mysql/mysql_binding.h>
+
+using namespace boost::posix_time;
+using namespace isc::asiolink;
+using namespace isc::data;
+using namespace isc::util;
+
+namespace isc {
+namespace db {
+
+std::string
+MySqlBinding::getString() const {
+ // Make sure the binding type is text.
+ validateAccess<std::string>();
+ if (length_ == 0) {
+ return (std::string());
+ }
+ return (std::string(buffer_.begin(), buffer_.begin() + length_));
+}
+
+std::string
+MySqlBinding::getStringOrDefault(const std::string& default_value) const {
+ if (amNull()) {
+ return (default_value);
+ }
+ return (getString());
+}
+
+ElementPtr
+MySqlBinding::getJSON() const {
+ if (amNull()) {
+ return (ElementPtr());
+ }
+ std::string s = getString();
+ return (Element::fromJSON(s));
+}
+
+std::vector<uint8_t>
+MySqlBinding::getBlob() const {
+ // Make sure the binding type is blob.
+ validateAccess<std::vector<uint8_t> >();
+ if (length_ == 0) {
+ return (std::vector<uint8_t>());
+ }
+ return (std::vector<uint8_t>(buffer_.begin(), buffer_.begin() + length_));
+}
+
+std::vector<uint8_t>
+MySqlBinding::getBlobOrDefault(const std::vector<uint8_t>& default_value) const {
+ if (amNull()) {
+ return (default_value);
+ }
+ return (getBlob());
+}
+
+float
+MySqlBinding::getFloat() const {
+ // It may seem a bit weird that we use getInteger template method
+ // for getting a floating point value. However, the getInteger method
+ // seems to be generic enough to support it. If we were to redo the
+ // API of this class we would probably introduce a getNumericValue
+ // method instead of getInteger. However, we already have getInteger
+ // used in many places so we should stick to it.
+ return (getInteger<float>());
+}
+
+ptime
+MySqlBinding::getTimestamp() const {
+ // Make sure the binding type is timestamp.
+ validateAccess<ptime>();
+ // Copy the buffer contents into native timestamp structure and
+ // then convert it to posix time.
+ const MYSQL_TIME* database_time = reinterpret_cast<const MYSQL_TIME*>(&buffer_[0]);
+ return (convertFromDatabaseTime(*database_time));
+}
+
+ptime
+MySqlBinding::getTimestampOrDefault(const ptime& default_value) const {
+ if (amNull()) {
+ return (default_value);
+ }
+ return (getTimestamp());
+}
+
+MySqlBindingPtr
+MySqlBinding::createString(const unsigned long length) {
+ MySqlBindingPtr binding(new MySqlBinding(MySqlBindingTraits<std::string>::column_type,
+ length));
+ return (binding);
+}
+
+MySqlBindingPtr
+MySqlBinding::createString(const std::string& value) {
+ MySqlBindingPtr binding(new MySqlBinding(MySqlBindingTraits<std::string>::column_type,
+ value.size()));
+ binding->setBufferValue(value.begin(), value.end());
+ return (binding);
+}
+
+MySqlBindingPtr
+MySqlBinding::condCreateString(const Optional<std::string>& value) {
+ return (value.unspecified() ? MySqlBinding::createNull() : createString(value));
+}
+
+MySqlBindingPtr
+MySqlBinding::createBlob(const unsigned long length) {
+ MySqlBindingPtr binding(new MySqlBinding(MySqlBindingTraits<std::vector<uint8_t> >::column_type,
+ length));
+ return (binding);
+}
+
+MySqlBindingPtr
+MySqlBinding::createFloat(const float value) {
+ // It may seem a bit weird that we use createInteger template method
+ // for setting a floating point value. However, the setInteger method
+ // seems to be generic enough to support it. If we were to redo the
+ // API of this class we would probably introduce a createNumericValue
+ // method instead of createInteger. However, we already have createInteger
+ // used in many places so we should stick to it.
+ return (createInteger<float>(value));
+}
+
+MySqlBindingPtr
+MySqlBinding::createBool() {
+ return (createInteger<uint8_t>(static_cast<uint8_t>(false)));
+}
+
+MySqlBindingPtr
+MySqlBinding::createBool(const bool value) {
+ return (createInteger<uint8_t>(static_cast<uint8_t>(value)));
+}
+
+MySqlBindingPtr
+MySqlBinding::condCreateBool(const util::Optional<bool>& value) {
+ if (value.unspecified()) {
+ return (MySqlBinding::createNull());
+ }
+
+ return (createInteger<uint8_t>(static_cast<uint8_t>(value.get())));
+}
+
+MySqlBindingPtr
+MySqlBinding::condCreateIPv4Address(const Optional<IOAddress>& value) {
+ // If the value is unspecified it doesn't matter what the value is.
+ if (value.unspecified()) {
+ return (MySqlBinding::createNull());
+ }
+
+ // Make sure it is an IPv4 address.
+ if (!value.get().isV4()) {
+ isc_throw(BadValue, "unable to create a MySQL binding: specified value '"
+ << value.get().toText() << "' is not an IPv4 address");
+ }
+
+ return (createInteger<uint32_t>(value.get().toUint32()));
+}
+
+MySqlBindingPtr
+MySqlBinding::createTimestamp(const boost::posix_time::ptime& timestamp) {
+ MySqlBindingPtr binding(new MySqlBinding(MySqlBindingTraits<ptime>::column_type,
+ MySqlBindingTraits<ptime>::length));
+ binding->setTimestampValue(timestamp);
+ return (binding);
+}
+
+MySqlBindingPtr
+MySqlBinding::createTimestamp() {
+ MySqlBindingPtr binding(new MySqlBinding(MySqlBindingTraits<ptime>::column_type,
+ MySqlBindingTraits<ptime>::length));
+ return (binding);
+}
+
+MySqlBindingPtr
+MySqlBinding::createNull() {
+ MySqlBindingPtr binding(new MySqlBinding(MYSQL_TYPE_NULL, 0));
+ return (binding);
+}
+
+void
+MySqlBinding::convertToDatabaseTime(const time_t input_time,
+ MYSQL_TIME& output_time) {
+
+ // Clear output data.
+ memset(&output_time, 0, sizeof(MYSQL_TIME));
+
+ // Convert to broken-out time
+ struct tm time_tm;
+ (void) localtime_r(&input_time, &time_tm);
+
+ // Place in output expire structure.
+ output_time.year = time_tm.tm_year + 1900;
+ output_time.month = time_tm.tm_mon + 1; // Note different base
+ output_time.day = time_tm.tm_mday;
+ output_time.hour = time_tm.tm_hour;
+ output_time.minute = time_tm.tm_min;
+ output_time.second = time_tm.tm_sec;
+ output_time.second_part = 0; // No fractional seconds
+ output_time.neg = my_bool(0); // Not negative
+}
+
+void
+MySqlBinding::convertToDatabaseTime(const boost::posix_time::ptime& input_time,
+ MYSQL_TIME& output_time) {
+ if (input_time.is_not_a_date_time()) {
+ isc_throw(BadValue, "Time value is not a valid posix time");
+ }
+
+ // Clear output data.
+ memset(&output_time, 0, sizeof(MYSQL_TIME));
+
+ output_time.year = input_time.date().year();
+ output_time.month = input_time.date().month();
+ output_time.day = input_time.date().day();
+ output_time.hour = input_time.time_of_day().hours();
+ output_time.minute = input_time.time_of_day().minutes();
+ output_time.second = input_time.time_of_day().seconds();
+ /// @todo Use fractional seconds instead of 0 when minimum supported
+ /// MySQL version has it.
+ output_time.second_part = 0;
+/* output_time.second_part = input_time.time_of_day().fractional_seconds()
+ *1000000/time_duration::ticks_per_second(); */
+ output_time.neg = my_bool(0);
+}
+
+void
+MySqlBinding::convertToDatabaseTime(const time_t cltt,
+ const uint32_t valid_lifetime,
+ MYSQL_TIME& expire) {
+
+ // Calculate expiry time. Store it in the 64-bit value so as we can detect
+ // overflows.
+ int64_t expire_time_64 = static_cast<int64_t>(cltt) +
+ static_cast<int64_t>(valid_lifetime);
+
+ // Even on 64-bit systems MySQL doesn't seem to accept the timestamps
+ // beyond the max value of int32_t.
+ if (expire_time_64 > DatabaseConnection::MAX_DB_TIME) {
+ isc_throw(BadValue, "Time value is too large: " << expire_time_64);
+ }
+
+ // Clear output data.
+ memset(&expire, 0, sizeof(MYSQL_TIME));
+
+ const time_t expire_time = static_cast<time_t>(expire_time_64);
+
+ // Convert to broken-out time
+ struct tm expire_tm;
+ (void) localtime_r(&expire_time, &expire_tm);
+
+ // Place in output expire structure.
+ expire.year = expire_tm.tm_year + 1900;
+ expire.month = expire_tm.tm_mon + 1; // Note different base
+ expire.day = expire_tm.tm_mday;
+ expire.hour = expire_tm.tm_hour;
+ expire.minute = expire_tm.tm_min;
+ expire.second = expire_tm.tm_sec;
+ expire.second_part = 0; // No fractional seconds
+ expire.neg = my_bool(0); // Not negative
+}
+
+void
+MySqlBinding::convertFromDatabaseTime(const MYSQL_TIME& expire,
+ uint32_t valid_lifetime,
+ time_t& cltt) {
+ // Copy across fields from MYSQL_TIME structure.
+ struct tm expire_tm;
+ memset(&expire_tm, 0, sizeof(expire_tm));
+
+ expire_tm.tm_year = expire.year - 1900;
+ expire_tm.tm_mon = expire.month - 1;
+ expire_tm.tm_mday = expire.day;
+ expire_tm.tm_hour = expire.hour;
+ expire_tm.tm_min = expire.minute;
+ expire_tm.tm_sec = expire.second;
+ expire_tm.tm_isdst = -1; // Let the system work out about DST
+
+ // Convert to local time
+ cltt = mktime(&expire_tm) - valid_lifetime;
+}
+
+ptime
+MySqlBinding::convertFromDatabaseTime(const MYSQL_TIME& database_time) {
+ /// @todo Use fractional seconds instead of 0 when minimum supported
+ /// MySQL version has it.
+ long fractional = 0;
+ // long fractional = database_time.second_part * time_duration::ticks_per_second()/1000000;
+ ptime pt(boost::gregorian::date(database_time.year,
+ boost::gregorian::greg_month(database_time.month),
+ database_time.day),
+ time_duration(database_time.hour, database_time.minute,
+ database_time.second, fractional));
+
+ return (pt);
+}
+
+MySqlBinding::MySqlBinding(enum_field_types buffer_type,
+ const size_t length)
+ // Make sure that the buffer has non-zero length in case we need to
+ // reference its first element to assign it to the MySQL binding.
+ : buffer_(length > 0 ? length : 1), length_(length),
+ null_value_(buffer_type == MYSQL_TYPE_NULL) {
+ memset(&bind_, 0, sizeof(MYSQL_BIND));
+ bind_.buffer_type = buffer_type;
+
+ if (buffer_type != MYSQL_TYPE_NULL) {
+ bind_.buffer = &buffer_[0];
+ bind_.buffer_length = length_;
+ bind_.length = &length_;
+ bind_.is_null = &null_value_;
+ }
+}
+
+void
+MySqlBinding::setBufferLength(const unsigned long length) {
+ length_ = length;
+ // It appears that the MySQL connectors sometimes require that the
+ // buffer is specified (set to a non-zero value), even if the buffer
+ // length is 0. We have found that setting the buffer to 0 value would
+ // cause the value inserted to the database be NULL. In order to avoid
+ // it, we simply make sure that the buffer length is at least 1 byte and
+ // provide the pointer to this byte within the binding.
+ buffer_.resize(length_ > 0 ? length_ : 1);
+ bind_.buffer = &buffer_[0];
+ bind_.buffer_length = length_;
+}
+
+void
+MySqlBinding::setTimestampValue(const ptime& timestamp) {
+ MYSQL_TIME database_time;
+ convertToDatabaseTime(timestamp, database_time);
+ // Copy database time into the buffer.
+ memcpy(static_cast<void*>(&buffer_[0]), reinterpret_cast<char*>(&database_time),
+ sizeof(MYSQL_TIME));
+ bind_.buffer = &buffer_[0];
+}
+
+} // end of namespace isc::db
+} // end of namespace isc
diff --git a/src/lib/mysql/mysql_binding.h b/src/lib/mysql/mysql_binding.h
new file mode 100644
index 0000000..57333f3
--- /dev/null
+++ b/src/lib/mysql/mysql_binding.h
@@ -0,0 +1,671 @@
+// Copyright (C) 2018-2022 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/.
+
+#ifndef MYSQL_BINDING_H
+#define MYSQL_BINDING_H
+
+#include <asiolink/io_address.h>
+#include <cc/data.h>
+#include <database/database_connection.h>
+#include <exceptions/exceptions.h>
+#include <util/optional.h>
+#include <boost/date_time/posix_time/conversion.hpp>
+#include <boost/date_time/posix_time/posix_time.hpp>
+#include <boost/shared_ptr.hpp>
+#include <mysql/mysql_constants.h>
+#include <mysql.h>
+#include <mysqld_error.h>
+#include <cstdint>
+#include <iterator>
+#include <string>
+#include <vector>
+
+namespace isc {
+namespace db {
+
+/// @brief Trait class for column types supported in MySQL.
+///
+/// This class is used to map C++ types to MySQL column types
+/// defined in MySQL C API and their sizes. Specializations of
+/// this class provide such mapping. The default is a BLOB type
+/// which can be used for various input types.
+template<typename T>
+struct MySqlBindingTraits {
+ /// @brief Column type represented in MySQL C API.
+ static const enum_field_types column_type = MYSQL_TYPE_BLOB;
+ /// @brief Length of data in this column.
+ ///
+ /// The value of 0 is used for variable size columns.
+ static const size_t length = 0;
+ /// @brief Boolean value indicating if the numeric value is
+ /// unsigned.
+ static const bool am_unsigned = false;
+};
+
+/// @brief Specialization for MySQL TEXT type.
+template<>
+struct MySqlBindingTraits<std::string> {
+ static const enum_field_types column_type = MYSQL_TYPE_STRING;
+ static const size_t length = 0;
+ static const bool am_unsigned = false;
+};
+
+/// @brief Specialization for MySQL TIMESTAMP type.
+template<>
+struct MySqlBindingTraits<boost::posix_time::ptime> {
+ static const enum_field_types column_type = MYSQL_TYPE_TIMESTAMP;
+ static const size_t length = sizeof(MYSQL_TIME);
+ static const bool am_unsignged = false;
+};
+
+/// @brief Specialization for MySQL TINYINT type.
+template<>
+struct MySqlBindingTraits<int8_t> {
+ static const enum_field_types column_type = MYSQL_TYPE_TINY;
+ static const size_t length = 1;
+ static const bool am_unsigned = false;
+};
+
+/// @brief Specialization for MySQL TINYINT UNSIGNED type.
+template<>
+struct MySqlBindingTraits<uint8_t> {
+ static const enum_field_types column_type = MYSQL_TYPE_TINY;
+ static const size_t length = 1;
+ static const bool am_unsigned = true;
+};
+
+/// @brief Speclialization for MySQL SMALLINT type.
+template<>
+struct MySqlBindingTraits<int16_t> {
+ static const enum_field_types column_type = MYSQL_TYPE_SHORT;
+ static const size_t length = 2;
+ static const bool am_unsigned = false;
+};
+
+/// @brief Specialization for MySQL SMALLINT UNSIGNED type.
+template<>
+struct MySqlBindingTraits<uint16_t> {
+ static const enum_field_types column_type = MYSQL_TYPE_SHORT;
+ static const size_t length = 2;
+ static const bool am_unsigned = true;
+};
+
+/// @brief Specialization for MySQL INT type.
+template<>
+struct MySqlBindingTraits<int32_t> {
+ static const enum_field_types column_type = MYSQL_TYPE_LONG;
+ static const size_t length = 4;
+ static const bool am_unsigned = false;
+};
+
+/// @brief Specialization for MySQL INT UNSIGNED type.
+template<>
+struct MySqlBindingTraits<uint32_t> {
+ static const enum_field_types column_type = MYSQL_TYPE_LONG;
+ static const size_t length = 4;
+ static const bool am_unsigned = true;
+};
+
+/// @brief Specialization for MySQL BIGINT type.
+template<>
+struct MySqlBindingTraits<int64_t> {
+ static const enum_field_types column_type = MYSQL_TYPE_LONGLONG;
+ static const size_t length = 8;
+ static const bool am_unsigned = false;
+};
+
+/// @brief Specialization for MySQL BIGINT UNSIGNED type.
+template<>
+struct MySqlBindingTraits<uint64_t> {
+ static const enum_field_types column_type = MYSQL_TYPE_LONGLONG;
+ static const size_t length = 8;
+ static const bool am_unsigned = true;
+};
+
+template<>
+struct MySqlBindingTraits<float> {
+ static const enum_field_types column_type = MYSQL_TYPE_FLOAT;
+ static const size_t length = 4;
+ static const bool am_unsigned = false;
+};
+
+/// @brief Forward declaration of @c MySqlBinding class.
+class MySqlBinding;
+
+/// @brief Shared pointer to the @c Binding class.
+typedef boost::shared_ptr<MySqlBinding> MySqlBindingPtr;
+
+/// @brief MySQL binding used in prepared statements.
+///
+/// Kea uses prepared statements to execute queries in a database.
+/// Prepared statements include placeholders for the input parameters.
+/// These parameters are passed to the prepared statements via a
+/// collection of @c MYSQL_BIND structures. The same structures are
+/// used to receive the values from the database as a result of
+/// SELECT statements.
+///
+/// The @c MYSQL_BIND structure contains information about the
+/// data type and length. It also contains pointer to the buffer
+/// actually holding the data to be passed to the database, a
+/// flag indicating if the value is null etc.
+///
+/// The @c MySqlBinding is a C++ wrapper around this structure which
+/// is meant to ease management of the MySQL bindings. The major
+/// benefit is that the @c MySqlBinding class owns the buffer,
+/// holding the data as well as other variables which are assigned
+/// to the @c MYSQL_BIND structure. It also automatically detects
+/// the appropriate @c enum_field_types value based on the C++
+/// type used in the binding.
+class MySqlBinding {
+public:
+
+ /// @brief Returns MySQL column type for the binding.
+ ///
+ /// @return column type, e.g. MYSQL_TYPE_STRING.
+ enum_field_types getType() const {
+ return (bind_.buffer_type);
+ }
+
+ /// @brief Returns reference to the native binding.
+ ///
+ /// The returned reference is only valid for the lifetime of the
+ /// object. Make sure that the object is not destroyed as long
+ /// as the binding is required. In particular, do not destroy this
+ /// object before database query is complete.
+ ///
+ /// @return Reference to native MySQL binding.
+ MYSQL_BIND& getMySqlBinding() {
+ return (bind_);
+ }
+
+ /// @brief Returns value held in the binding as string.
+ ///
+ /// Call @c MySqlBinding::amNull to verify that the value is not
+ /// null prior to calling this method.
+ ///
+ /// @throw InvalidOperation if the value is NULL or the binding
+ /// type is not @c MYSQL_TYPE_STRING.
+ ///
+ /// @return String value.
+ std::string getString() const;
+
+ /// @brief Returns value held in the binding as string.
+ ///
+ /// If the value to be returned is null, a default value is returned.
+ ///
+ /// @param default_value Default value.
+ ///
+ /// @throw InvalidOperation if the binding type is not @c MYSQL_TYPE_STRING.
+ ///
+ /// @return String value.
+ std::string getStringOrDefault(const std::string& default_value) const;
+
+ /// @brief Returns value held in the binding as JSON.
+ ///
+ /// Call @c MySqlBinding::amNull to verify that the value is not
+ /// null prior to calling this method.
+ ///
+ /// @throw InvalidOperation if the binding is not @c MYSQL_TYPE_STRING.
+ /// @throw data::JSONError if the string value is not a valid JSON.
+ ///
+ /// @return JSON structure or NULL if the string is null.
+ data::ElementPtr getJSON() const;
+
+ /// @brief Returns value held in the binding as blob.
+ ///
+ /// Call @c MySqlBinding::amNull to verify that the value is not
+ /// null prior to calling this method.
+ ///
+ /// @throw InvalidOperation if the value is NULL or the binding
+ /// type is not @c MYSQL_TYPE_BLOB.
+ ///
+ /// @return Blob in a vector.
+ std::vector<uint8_t> getBlob() const;
+
+ /// @brief Returns value held in the binding as blob.
+ ///
+ /// If the value to be returned is null, a default value is returned.
+ ///
+ /// @param default_value Default value.
+ ///
+ /// @throw InvalidOperation if the binding type is not @c MYSQL_TYPE_BLOB.
+ ///
+ /// @return Blob in a vector.
+ std::vector<uint8_t>
+ getBlobOrDefault(const std::vector<uint8_t>& default_value) const;
+
+ /// @brief Returns numeric value held in the binding.
+ ///
+ /// Call @c MySqlBinding::amNull to verify that the value is not
+ /// null prior to calling this method.
+ ///
+ /// @tparam Numeric type corresponding to the binding type, e.g.
+ /// @c uint8_t, @c uint16_t etc.
+ ///
+ /// @throw InvalidOperation if the value is NULL or the binding
+ /// type does not match the template parameter.
+ ///
+ /// @return Numeric value of a specified type.
+ template<typename T>
+ T getInteger() const {
+ // Make sure that the binding type is numeric.
+ validateAccess<T>();
+
+ // Convert the buffer to a numeric type and then return a copy.
+ const T* value = reinterpret_cast<const T*>(&buffer_[0]);
+ return (*value);
+ }
+
+ /// @brief Returns numeric value held in the binding.
+ ///
+ /// If the value to be returned is null, a default value is returned.
+ ///
+ /// @tparam Numeric type corresponding to the binding type, e.g.
+ /// @c uint8_t, @c uint16_t etc.
+ /// @param default_value Default value.
+ ///
+ /// @throw InvalidOperation if the binding type does not match the
+ /// template parameter.
+ ///
+ /// @return Numeric value of a specified type.
+ template<typename T>
+ T getIntegerOrDefault(T default_value) const {
+ if (amNull()) {
+ return (default_value);
+ }
+ return (getInteger<T>());
+ }
+
+ /// @brief Returns float value held in the binding.
+ ///
+ /// Call @c MySqlBinding::amNull to verify that the value is not
+ /// null prior to calling this method.
+ ///
+ /// @throw InvalidOperation if the value is NULL or the binding
+ /// type does not match the template parameter.
+ ///
+ /// @return Float value.
+ float getFloat() const;
+
+ /// @brief Returns boolean value held in the binding.
+ ///
+ /// Call @c MySqlBinding::amNull to verify that the value is not
+ /// null prior to calling this method.
+ ///
+ /// @throw InvalidOperation if the value is NULL or the binding
+ /// type is not uint8_t.
+ ///
+ /// @return Boolean value.
+ bool getBool() const {
+ return (static_cast<bool>(getInteger<uint8_t>()));
+ }
+
+ /// @brief Returns timestamp value held in the binding.
+ ///
+ /// Call @c MySqlBinding::amNull to verify that the value is not
+ /// null prior to calling this method.
+ ///
+ /// @throw InvalidOperation if the value is NULL or the binding
+ /// type is not @c MYSQL_TYPE_TIMESTAMP.
+ ///
+ /// @return Timestamp converted to POSIX time.
+ boost::posix_time::ptime getTimestamp() const;
+
+ /// @brief Returns timestamp value held in the binding.
+ ///
+ /// If the value to be returned is null, a default value is returned.
+ ///
+ /// @param default_value Default value.
+ ///
+ /// @throw InvalidOperation if the binding type is not @c MYSQL_TYPE_TIMESTAMP.
+ ///
+ /// @return Timestamp converted to POSIX time.
+ boost::posix_time::ptime
+ getTimestampOrDefault(const boost::posix_time::ptime& default_value) const;
+
+ /// @brief Checks if the bound value is NULL.
+ ///
+ /// @return true if the value in the binding is NULL, false otherwise.
+ bool amNull() const {
+ return (null_value_ == MLM_TRUE);
+ }
+
+ /// @brief Creates binding of text type for receiving data.
+ ///
+ /// @param length Length of the buffer into which received data will
+ /// be stored.
+ ///
+ /// @return Pointer to the created binding.
+ static MySqlBindingPtr createString(const unsigned long length);
+
+ /// @brief Creates binding of text type for sending data.
+ ///
+ /// @param value String value to be sent to the database.
+ ///
+ /// @return Pointer to the created binding.
+ static MySqlBindingPtr createString(const std::string& value);
+
+ /// @brief Conditionally creates binding of text type for sending
+ /// data if provided value is unspecified.
+ ///
+ /// @param value String value to be sent to the database.
+ ///
+ /// @return Pointer to the created binding.
+ static MySqlBindingPtr condCreateString(const util::Optional<std::string>& value);
+
+ /// @brief Creates binding of blob type for receiving data.
+ ///
+ /// @param length Length of the buffer into which received data will
+ /// be stored.
+ ///
+ /// @return Pointer to the created binding.
+ static MySqlBindingPtr createBlob(const unsigned long length);
+
+ /// @brief Creates binding of blob type for sending data.
+ ///
+ /// @tparam Iterator Type of the iterator.
+ ///
+ /// @param begin Iterator pointing to the beginning of the input
+ /// buffer holding the data to be sent to the database.
+ /// @param end Iterator pointing to the end of the input buffer
+ /// holding the data to be sent to the database.
+ ///
+ /// @return Pointer to the created binding.
+ template<typename Iterator>
+ static MySqlBindingPtr createBlob(Iterator begin, Iterator end) {
+ MySqlBindingPtr binding(new MySqlBinding(MYSQL_TYPE_BLOB,
+ std::distance(begin, end)));
+ binding->setBufferValue(begin, end);
+ return (binding);
+ }
+
+ /// @brief Creates binding of numeric type for receiving data.
+ ///
+ /// @tparam Numeric type corresponding to the binding type, e.g.
+ /// @c uint8_t, @c uint16_t etc.
+ ///
+ /// @return Pointer to the created binding.
+ template<typename T>
+ static MySqlBindingPtr createInteger() {
+ MySqlBindingPtr binding(new MySqlBinding(MySqlBindingTraits<T>::column_type,
+ MySqlBindingTraits<T>::length));
+ binding->setValue<T>(0);
+ return (binding);
+ }
+
+ /// @brief Creates binding of numeric type for sending data.
+ ///
+ /// @tparam Numeric type corresponding to the binding type, e.g.
+ /// @c uint8_t, @c uint16_t etc.
+ ///
+ /// @param value Numeric value to be sent to the database.
+ ///
+ /// @return Pointer to the created binding.
+ template<typename T>
+ static MySqlBindingPtr createInteger(T value) {
+ MySqlBindingPtr binding(new MySqlBinding(MySqlBindingTraits<T>::column_type,
+ MySqlBindingTraits<T>::length));
+ binding->setValue(value);
+ return (binding);
+ }
+
+ /// @brief Conditionally creates binding of numeric type for sending
+ /// data if provided value is specified.
+ ///
+ /// @tparam T Numeric type corresponding to the binding type, e.g.
+ /// @c uint8_t, @c uint16_t etc.
+ ///
+ /// @param value Numeric value to be sent to the database.
+ ///
+ /// @return Pointer to the created binding.
+ template<typename T>
+ static MySqlBindingPtr condCreateInteger(const util::Optional<T>& value) {
+ return (value.unspecified() ? createNull() : createInteger<T>(value.get()));
+ }
+
+ /// @brief Creates binding having a float type for sending data.
+ ///
+ /// @param value Float value to be sent to the database.
+ ///
+ /// @return Pointer to the created binding.
+ static MySqlBindingPtr createFloat(const float value);
+
+ /// @brief Conditionally creates binding of float type for sending data if
+ /// provided value is specified.
+ ///
+ /// @tparam T Floating point type to be converted to float.
+ ///
+ /// @param value Value to be stored in the database as float.
+ ///
+ /// @return Pointer to the created binding.
+ template<typename T>
+ static MySqlBindingPtr condCreateFloat(const util::Optional<T>& value) {
+ return (value.unspecified() ? createNull() :
+ createInteger<float> (static_cast<float>(value.get())));
+ }
+
+ /// @brief Creates binding having a bool type for receiving data.
+ ///
+ /// @return Pointer to the created binding holding an @c uint8_t
+ /// value representing the boolean value.
+ static MySqlBindingPtr createBool();
+
+ /// @brief Creates binding having a bool type for sending data.
+ ///
+ /// @param value Boolean value to be sent to the database.
+ ///
+ /// @return Pointer to the created binding holding an @c uint8_t
+ /// value representing the boolean value.
+ static MySqlBindingPtr createBool(const bool value);
+
+ /// @brief Conditionally creates binding of @c uint8_t type representing
+ /// a boolean value if provided value is specified.
+ ///
+ /// @param value Boolean value for which the binding should be created.
+ ///
+ /// @return Pointer to the created binding.
+ static MySqlBindingPtr condCreateBool(const util::Optional<bool>& value);
+
+ /// @brief Conditionally creates binding of @c uint32_t type representing
+ /// an IPv4 address if provided value is specified.
+ ///
+ /// @param value @c IOAddress encapsulating an IPv4 address.
+ ///
+ /// @return Pointer to the created binding.
+ static MySqlBindingPtr
+ condCreateIPv4Address(const util::Optional<asiolink::IOAddress>& value);
+
+ /// @brief Creates binding of timestamp type for receiving data.
+ ///
+ /// @return Pointer to the created binding.
+ static MySqlBindingPtr createTimestamp();
+
+ /// @brief Creates binding of timestamp type for sending data.
+ ///
+ /// @param timestamp Timestamp value to be sent to the database.
+ ///
+ /// @return Pointer to the created binding.
+ static MySqlBindingPtr createTimestamp(const boost::posix_time::ptime& timestamp);
+
+ /// @brief Creates binding encapsulating a NULL value.
+ ///
+ /// This method is used to create a binding encapsulating a NULL
+ /// value, which can be used to assign NULL to any type of column.
+ ///
+ /// @return Pointer to the created binding.
+ static MySqlBindingPtr createNull();
+
+ /// @brief Converts time_t value to database time.
+ ///
+ /// @param input_time A time_t value representing time.
+ /// @param output_time Reference to MYSQL_TIME object where converted time
+ /// will be put.
+ static void convertToDatabaseTime(const time_t input_time,
+ MYSQL_TIME& output_time);
+
+ /// @brief Converts POSIX time value to database time.
+ ///
+ /// @param input_time A POSIX time value representing local time.
+ /// @param output_time Reference to MYSQL_TIME object where converted time
+ /// will be put.
+ static void convertToDatabaseTime(const boost::posix_time::ptime& input_time,
+ MYSQL_TIME& output_time);
+
+ /// @brief Converts Lease Time to Database Times
+ ///
+ /// Within the DHCP servers, times are stored as client last transmit time
+ /// and valid lifetime. In the database, the information is stored as
+ /// valid lifetime and "expire" (time of expiry of the lease). They are
+ /// related by the equation:
+ ///
+ /// - expire = client last transmit time + valid lifetime
+ ///
+ /// This method converts from the times in the lease object into times
+ /// able to be added to the database.
+ ///
+ /// @param cltt Client last transmit time
+ /// @param valid_lifetime Valid lifetime
+ /// @param expire Reference to MYSQL_TIME object where the expiry time of
+ /// the DHCP lease will be put.
+ ///
+ /// @throw isc::BadValue if the sum of the calculated expiration time is
+ /// greater than the value of @c LeaseMgr::MAX_DB_TIME.
+ static void convertToDatabaseTime(const time_t cltt,
+ const uint32_t valid_lifetime,
+ MYSQL_TIME& expire);
+
+ /// @brief Converts Database Time to Lease Times
+ ///
+ /// Within the database, time is stored as "expire" (time of expiry of the
+ /// lease) and valid lifetime. In the DHCP server, the information is
+ /// stored client last transmit time and valid lifetime. These are related
+ /// by the equation:
+ ///
+ /// - client last transmit time = expire - valid_lifetime
+ ///
+ /// This method converts from the times in the database into times
+ /// able to be inserted into the lease object.
+ ///
+ /// @param expire Reference to MYSQL_TIME object from where the expiry
+ /// time of the lease is taken.
+ /// @param valid_lifetime lifetime of the lease.
+ /// @param cltt Reference to location where client last transmit time
+ /// is put.
+ static void convertFromDatabaseTime(const MYSQL_TIME& expire,
+ uint32_t valid_lifetime,
+ time_t& cltt);
+
+ /// @brief Converts database time to POSIX time.
+ ///
+ /// @param database_time Reference to MYSQL_TIME object where database
+ /// time is stored.
+ ///
+ /// @return Database time converted to local POSIX time.
+ static boost::posix_time::ptime
+ convertFromDatabaseTime(const MYSQL_TIME& database_time);
+
+private:
+
+ /// @brief Private constructor.
+ ///
+ /// This constructor is private because MySQL bindings should only be
+ /// created using static factory functions.
+ ///
+ /// @param buffer_type MySQL buffer type as defined in MySQL C API.
+ /// @param length Buffer length.
+ MySqlBinding(enum_field_types buffer_type, const size_t length);
+
+ /// @brief Assigns new value to a buffer.
+ ///
+ /// @tparam Iterator Type of the iterators marking beginning and end
+ /// of the range to be assigned to the buffer.
+ ///
+ /// @param begin Iterator pointing to the beginning of the assigned
+ /// range.
+ /// @param end Iterator pointing to the end of the assigned range.
+ template<typename Iterator>
+ void setBufferValue(Iterator begin, Iterator end) {
+ length_ = std::distance(begin, end);
+ buffer_.assign(begin, end);
+ // It appears that the MySQL connectors sometimes require that the
+ // buffer is specified (set to a non-zero value), even if the buffer
+ // length is 0. We have found that setting the buffer to 0 value would
+ // cause the value inserted to the database be NULL. In order to avoid
+ // it, we simply make sure that the buffer length is at least 1 byte and
+ // provide the pointer to this byte within the binding.
+ if (buffer_.empty()) {
+ buffer_.resize(1);
+ }
+ bind_.buffer = &buffer_[0];
+ bind_.buffer_length = length_;
+ }
+
+ /// @brief Resizes the buffer and assigns new length to the binding.
+ ///
+ /// @param length New buffer length to be used.
+ void setBufferLength(const unsigned long length);
+
+ /// @brief Copies numeric value to a buffer and modifies "unsigned" flag
+ /// accoriding to the numeric type used.
+ ///
+ /// @tparam T Type of the numeric value.
+ ///
+ /// @param value Value to be copied to the buffer.
+ template<typename T>
+ void setValue(T value) {
+ memcpy(static_cast<void*>(&buffer_[0]), reinterpret_cast<char*>(&value),
+ sizeof(value));
+ bind_.buffer = &buffer_[0];
+ bind_.is_unsigned = (MySqlBindingTraits<T>::am_unsigned ? MLM_TRUE : MLM_FALSE);
+ }
+
+ /// @brief Converts timestamp to database time value and copies it to
+ /// the buffer.
+ ///
+ /// @param timestamp Timestamp value as POSIX time.
+ void setTimestampValue(const boost::posix_time::ptime& timestamp);
+
+ /// @brief Checks if the data accessor called is matching the type
+ /// of the data held in the binding.
+ ///
+ /// @tparam Data type requested, e.g. @c std::string.
+ ///
+ /// @throw InvalidOperation if the requested data type is not matching
+ /// the type of the binding, e.g. called @c getString but the binding
+ /// type is @c MYSQL_TYPE_LONG.
+ template<typename T>
+ void validateAccess() const {
+ // Can't retrieve null value.
+ if (amNull()) {
+ isc_throw(InvalidOperation, "retrieved value is null");
+ }
+ // The type of the accessor must match the stored data type.
+ if (MySqlBindingTraits<T>::column_type != getType()) {
+ isc_throw(InvalidOperation, "mismatched column type");
+ }
+ }
+
+ /// @brief Data buffer (both input and output).
+ std::vector<uint8_t> buffer_;
+
+ /// @brief Buffer length.
+ unsigned long length_;
+
+ /// @brief Flag indicating whether the value of the binding is NULL.
+ my_bool null_value_;
+
+ /// @brief Native MySQL binding wrapped by this class.
+ MYSQL_BIND bind_;
+};
+
+/// @brief Collection of bindings.
+typedef std::vector<MySqlBindingPtr> MySqlBindingCollection;
+
+
+} // end of namespace isc::db
+} // end of namespace isc
+
+#endif
diff --git a/src/lib/mysql/mysql_connection.cc b/src/lib/mysql/mysql_connection.cc
new file mode 100644
index 0000000..fc65cce
--- /dev/null
+++ b/src/lib/mysql/mysql_connection.cc
@@ -0,0 +1,521 @@
+// Copyright (C) 2012-2022 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 <database/db_log.h>
+#include <exceptions/exceptions.h>
+#include <mysql/mysql_connection.h>
+#include <util/file_utilities.h>
+
+#include <boost/lexical_cast.hpp>
+
+#include <algorithm>
+#include <stdint.h>
+#include <string>
+#include <limits>
+
+using namespace isc;
+using namespace std;
+
+namespace isc {
+namespace db {
+
+int MySqlHolder::atexit_ = [] {
+ return atexit([] { mysql_library_end(); });
+}();
+
+/// @todo: Migrate this default value to src/bin/dhcpX/simple_parserX.cc
+const int MYSQL_DEFAULT_CONNECTION_TIMEOUT = 5; // seconds
+
+MySqlTransaction::MySqlTransaction(MySqlConnection& conn)
+ : conn_(conn), committed_(false) {
+ conn_.startTransaction();
+}
+
+MySqlTransaction::~MySqlTransaction() {
+ // Rollback if the MySqlTransaction::commit wasn't explicitly
+ // called.
+ if (!committed_) {
+ conn_.rollback();
+ }
+}
+
+void
+MySqlTransaction::commit() {
+ conn_.commit();
+ committed_ = true;
+}
+
+// Open the database using the parameters passed to the constructor.
+
+void
+MySqlConnection::openDatabase() {
+ // Set up the values of the parameters
+ const char* host = "localhost";
+ string shost;
+ try {
+ shost = getParameter("host");
+ host = shost.c_str();
+ } catch (...) {
+ // No host. Fine, we'll use "localhost"
+ }
+
+ unsigned int port = 0;
+ string sport;
+ try {
+ sport = getParameter("port");
+ } catch (...) {
+ // No port parameter, we are going to use the default port.
+ sport = "";
+ }
+
+ if (sport.size() > 0) {
+ // Port was given, so try to convert it to an integer.
+
+ try {
+ port = boost::lexical_cast<unsigned int>(sport);
+ } catch (...) {
+ // Port given but could not be converted to an unsigned int.
+ // Just fall back to the default value.
+ port = 0;
+ }
+
+ // The port is only valid when it is in the 0..65535 range.
+ // Again fall back to the default when the given value is invalid.
+ if (port > numeric_limits<uint16_t>::max()) {
+ port = 0;
+ }
+ }
+
+ const char* user = NULL;
+ string suser;
+ try {
+ suser = getParameter("user");
+ user = suser.c_str();
+ } catch (...) {
+ // No user. Fine, we'll use NULL
+ }
+
+ const char* password = NULL;
+ string spassword;
+ try {
+ spassword = getParameter("password");
+ password = spassword.c_str();
+ } catch (...) {
+ // No password. Fine, we'll use NULL
+ }
+
+ const char* name = NULL;
+ string sname;
+ try {
+ sname = getParameter("name");
+ name = sname.c_str();
+ } catch (...) {
+ // No database name. Throw a "NoName" exception
+ isc_throw(NoDatabaseName, "must specify a name for the database");
+ }
+
+ unsigned int connect_timeout = MYSQL_DEFAULT_CONNECTION_TIMEOUT;
+ string stimeout;
+ try {
+ stimeout = getParameter("connect-timeout");
+ } catch (...) {
+ // No timeout parameter, we are going to use the default timeout.
+ stimeout = "";
+ }
+
+ if (stimeout.size() > 0) {
+ // Timeout was given, so try to convert it to an integer.
+
+ try {
+ connect_timeout = boost::lexical_cast<unsigned int>(stimeout);
+ } catch (...) {
+ // Timeout given but could not be converted to an unsigned int. Set
+ // the connection timeout to an invalid value to trigger throwing
+ // of an exception.
+ connect_timeout = 0;
+ }
+
+ // The timeout is only valid if greater than zero, as depending on the
+ // database, a zero timeout might signify something like "wait
+ // indefinitely".
+ //
+ // The check below also rejects a value greater than the maximum
+ // integer value. The lexical_cast operation used to obtain a numeric
+ // value from a string can get confused if trying to convert a negative
+ // integer to an unsigned int: instead of throwing an exception, it may
+ // produce a large positive value.
+ if ((connect_timeout == 0) ||
+ (connect_timeout > numeric_limits<int>::max())) {
+ isc_throw(DbInvalidTimeout, "database connection timeout (" <<
+ stimeout << ") must be an integer greater than 0");
+ }
+ }
+
+ const char* ca_file(0);
+ const char* ca_dir(0);
+ string sca;
+ try {
+ sca = getParameter("trust-anchor");
+ tls_ = true;
+ if (util::file::isDir(sca)) {
+ ca_dir = sca.c_str();
+ } else {
+ ca_file = sca.c_str();
+ }
+ } catch (...) {
+ // No trust anchor
+ }
+
+ const char* cert_file(0);
+ string scert;
+ try {
+ scert = getParameter("cert-file");
+ tls_ = true;
+ cert_file = scert.c_str();
+ } catch (...) {
+ // No client certificate file
+ }
+
+ const char* key_file(0);
+ string skey;
+ try {
+ skey = getParameter("key-file");
+ tls_ = true;
+ key_file = skey.c_str();
+ } catch (...) {
+ // No private key file
+ }
+
+ const char* cipher_list(0);
+ string scipher;
+ try {
+ scipher = getParameter("cipher-list");
+ tls_ = true;
+ cipher_list = scipher.c_str();
+ } catch (...) {
+ // No cipher list
+ }
+
+ // Set options for the connection:
+ //
+ // Set options for the connection:
+ // Make sure auto_reconnect is OFF! Enabling it leaves us with an unusable
+ // connection after a reconnect as among other things, it drops all our
+ // pre-compiled statements.
+ my_bool auto_reconnect = MLM_FALSE;
+ int result = mysql_options(mysql_, MYSQL_OPT_RECONNECT, &auto_reconnect);
+ if (result != 0) {
+ isc_throw(DbOpenError, "unable to set auto-reconnect option: " <<
+ mysql_error(mysql_));
+ }
+
+ // Make sure we have a large idle time window ... say 30 days...
+ const char *wait_time = "SET SESSION wait_timeout = 30 * 86400";
+ result = mysql_options(mysql_, MYSQL_INIT_COMMAND, wait_time);
+ if (result != 0) {
+ isc_throw(DbOpenError, "unable to set wait_timeout " <<
+ mysql_error(mysql_));
+ }
+
+ // Set SQL mode options for the connection: SQL mode governs how what
+ // constitutes insertable data for a given column, and how to handle
+ // invalid data. We want to ensure we get the strictest behavior and
+ // to reject invalid data with an error.
+ const char *sql_mode = "SET SESSION sql_mode ='STRICT_ALL_TABLES'";
+ result = mysql_options(mysql_, MYSQL_INIT_COMMAND, sql_mode);
+ if (result != 0) {
+ isc_throw(DbOpenError, "unable to set SQL mode options: " <<
+ mysql_error(mysql_));
+ }
+
+ // Connection timeout, the amount of time taken for the client to drop
+ // the connection if the server is not responding.
+ result = mysql_options(mysql_, MYSQL_OPT_CONNECT_TIMEOUT, &connect_timeout);
+ if (result != 0) {
+ isc_throw(DbOpenError, "unable to set database connection timeout: " <<
+ mysql_error(mysql_));
+ }
+
+ // If TLS is enabled set it. If something should go wrong it will happen
+ // later at the mysql_real_connect call.
+ if (tls_) {
+ mysql_ssl_set(mysql_, key_file, cert_file, ca_file, ca_dir,
+ cipher_list);
+ }
+
+ // Open the database.
+ //
+ // The option CLIENT_FOUND_ROWS is specified so that in an UPDATE,
+ // the affected rows are the number of rows found that match the
+ // WHERE clause of the SQL statement, not the rows changed. The reason
+ // here is that MySQL apparently does not update a row if data has not
+ // changed and so the "affected rows" (retrievable from MySQL) is zero.
+ // This makes it hard to distinguish whether the UPDATE changed no rows
+ // because no row matching the WHERE clause was found, or because a
+ // row was found but no data was altered.
+ MYSQL* status = mysql_real_connect(mysql_, host, user, password, name,
+ port, NULL, CLIENT_FOUND_ROWS);
+ if (status != mysql_) {
+ isc_throw(DbOpenError, mysql_error(mysql_));
+ }
+
+ // Enable autocommit. In case transaction is explicitly used, this
+ // setting will be overwritten for the transaction. However, there are
+ // cases when lack of autocommit could cause transactions to hang
+ // until commit or rollback is explicitly called. This already
+ // caused issues for some unit tests which were unable to cleanup
+ // the database after the test because of pending transactions.
+ // Use of autocommit will eliminate this problem.
+ my_bool autocommit_result = mysql_autocommit(mysql_, 1);
+ if (autocommit_result != 0) {
+ isc_throw(DbOperationError, mysql_error(mysql_));
+ }
+
+ // To avoid a flush to disk on every commit, the global parameter
+ // innodb_flush_log_at_trx_commit should be set to 2. This will cause the
+ // changes to be written to the log, but flushed to disk in the background
+ // every second. Setting the parameter to that value will speed up the
+ // system, but at the risk of losing data if the system crashes.
+}
+
+// Get schema version.
+
+std::pair<uint32_t, uint32_t>
+MySqlConnection::getVersion(const ParameterMap& parameters) {
+ // Get a connection.
+ MySqlConnection conn(parameters);
+
+ // Open the database.
+ conn.openDatabase();
+
+ // Allocate a new statement.
+ MYSQL_STMT *stmt = mysql_stmt_init(conn.mysql_);
+ if (stmt == NULL) {
+ isc_throw(DbOperationError, "unable to allocate MySQL prepared "
+ "statement structure, reason: " << mysql_error(conn.mysql_));
+ }
+
+ try {
+
+ // Prepare the statement from SQL text.
+ const char* version_sql = "SELECT version, minor FROM schema_version";
+ int status = mysql_stmt_prepare(stmt, version_sql, strlen(version_sql));
+ if (status != 0) {
+ isc_throw(DbOperationError, "unable to prepare MySQL statement <"
+ << version_sql << ">, reason: "
+ << mysql_error(conn.mysql_));
+ }
+
+ // Execute the prepared statement.
+ if (MysqlExecuteStatement(stmt) != 0) {
+ isc_throw(DbOperationError, "cannot execute schema version query <"
+ << version_sql << ">, reason: "
+ << mysql_errno(conn.mysql_));
+ }
+
+ // Bind the output of the statement to the appropriate variables.
+ MYSQL_BIND bind[2];
+ memset(bind, 0, sizeof(bind));
+
+ uint32_t version;
+ bind[0].buffer_type = MYSQL_TYPE_LONG;
+ bind[0].is_unsigned = 1;
+ bind[0].buffer = &version;
+ bind[0].buffer_length = sizeof(version);
+
+ uint32_t minor;
+ bind[1].buffer_type = MYSQL_TYPE_LONG;
+ bind[1].is_unsigned = 1;
+ bind[1].buffer = &minor;
+ bind[1].buffer_length = sizeof(minor);
+
+ if (mysql_stmt_bind_result(stmt, bind)) {
+ isc_throw(DbOperationError, "unable to bind result set for <"
+ << version_sql << ">, reason: "
+ << mysql_errno(conn.mysql_));
+ }
+
+ // Fetch the data.
+ if (mysql_stmt_fetch(stmt)) {
+ isc_throw(DbOperationError, "unable to bind result set for <"
+ << version_sql << ">, reason: "
+ << mysql_errno(conn.mysql_));
+ }
+
+ // Discard the statement and its resources
+ mysql_stmt_close(stmt);
+
+ return (std::make_pair(version, minor));
+
+ } catch (const std::exception&) {
+ // Avoid a memory leak on error.
+ mysql_stmt_close(stmt);
+
+ // Send the exception to the caller.
+ throw;
+ }
+}
+
+// Prepared statement setup. The textual form of an SQL statement is stored
+// in a vector of strings (text_statements_) and is used in the output of
+// error messages. The SQL statement is also compiled into a "prepared
+// statement" (stored in statements_), which avoids the overhead of compilation
+// during use. As prepared statements have resources allocated to them, the
+// class destructor explicitly destroys them.
+
+void
+MySqlConnection::prepareStatement(uint32_t index, const char* text) {
+ // Validate that there is space for the statement in the statements array
+ // and that nothing has been placed there before.
+ if ((index >= statements_.size()) || (statements_[index] != NULL)) {
+ isc_throw(InvalidParameter, "invalid prepared statement index (" <<
+ static_cast<int>(index) << ") or indexed prepared " <<
+ "statement is not null");
+ }
+
+ // All OK, so prepare the statement
+ text_statements_[index] = std::string(text);
+ statements_[index] = mysql_stmt_init(mysql_);
+ if (statements_[index] == NULL) {
+ isc_throw(DbOperationError, "unable to allocate MySQL prepared "
+ "statement structure, reason: " << mysql_error(mysql_));
+ }
+
+ int status = mysql_stmt_prepare(statements_[index], text, strlen(text));
+ if (status != 0) {
+ isc_throw(DbOperationError, "unable to prepare MySQL statement <" <<
+ text << ">, reason: " << mysql_error(mysql_));
+ }
+}
+
+void
+MySqlConnection::prepareStatements(const TaggedStatement* start_statement,
+ const TaggedStatement* end_statement) {
+ // Created the MySQL prepared statements for each DML statement.
+ for (const TaggedStatement* tagged_statement = start_statement;
+ tagged_statement != end_statement; ++tagged_statement) {
+ if (tagged_statement->index >= statements_.size()) {
+ statements_.resize(tagged_statement->index + 1, NULL);
+ text_statements_.resize(tagged_statement->index + 1,
+ std::string(""));
+ }
+ prepareStatement(tagged_statement->index,
+ tagged_statement->text);
+ }
+}
+
+void MySqlConnection::clearStatements() {
+ statements_.clear();
+ text_statements_.clear();
+}
+
+/// @brief Destructor
+MySqlConnection::~MySqlConnection() {
+ // Free up the prepared statements, ignoring errors. (What would we do
+ // about them? We're destroying this object and are not really concerned
+ // with errors on a database connection that is about to go away.)
+ for (int i = 0; i < statements_.size(); ++i) {
+ if (statements_[i] != NULL) {
+ (void) mysql_stmt_close(statements_[i]);
+ statements_[i] = NULL;
+ }
+ }
+ statements_.clear();
+ text_statements_.clear();
+}
+
+// Time conversion methods.
+//
+// Note that the MySQL TIMESTAMP data type (used for "expire") converts data
+// from the current timezone to UTC for storage, and from UTC to the current
+// timezone for retrieval.
+//
+// This causes no problems providing that:
+// a) cltt is given in local time
+// b) We let the system take care of timezone conversion when converting
+// from a time read from the database into a local time.
+void
+MySqlConnection::convertToDatabaseTime(const time_t input_time,
+ MYSQL_TIME& output_time) {
+ MySqlBinding::convertToDatabaseTime(input_time, output_time);
+}
+
+void
+MySqlConnection::convertToDatabaseTime(const time_t cltt,
+ const uint32_t valid_lifetime,
+ MYSQL_TIME& expire) {
+ MySqlBinding::convertToDatabaseTime(cltt, valid_lifetime, expire);
+}
+
+void
+MySqlConnection::convertFromDatabaseTime(const MYSQL_TIME& expire,
+ uint32_t valid_lifetime, time_t& cltt) {
+ MySqlBinding::convertFromDatabaseTime(expire, valid_lifetime, cltt);
+}
+
+void
+MySqlConnection::startTransaction() {
+ // If it is nested transaction, do nothing.
+ if (++transaction_ref_count_ > 1) {
+ return;
+ }
+
+ DB_LOG_DEBUG(DB_DBG_TRACE_DETAIL, MYSQL_START_TRANSACTION);
+ checkUnusable();
+ // We create prepared statements for all other queries, but MySQL
+ // don't support prepared statements for START TRANSACTION.
+ int status = mysql_query(mysql_, "START TRANSACTION");
+ if (status != 0) {
+ isc_throw(DbOperationError, "unable to start transaction, "
+ "reason: " << mysql_error(mysql_));
+ }
+}
+
+bool
+MySqlConnection::isTransactionStarted() const {
+ return (transaction_ref_count_ > 0);
+}
+
+void
+MySqlConnection::commit() {
+ if (transaction_ref_count_ <= 0) {
+ isc_throw(Unexpected, "commit called for not started transaction - coding error");
+ }
+
+ // When committing nested transaction, do nothing.
+ if (--transaction_ref_count_ > 0) {
+ return;
+ }
+ DB_LOG_DEBUG(DB_DBG_TRACE_DETAIL, MYSQL_COMMIT);
+ checkUnusable();
+ if (mysql_commit(mysql_) != 0) {
+ isc_throw(DbOperationError, "commit failed: "
+ << mysql_error(mysql_));
+ }
+}
+
+void
+MySqlConnection::rollback() {
+ if (transaction_ref_count_ <= 0) {
+ isc_throw(Unexpected, "rollback called for not started transaction - coding error");
+ }
+
+ // When rolling back nested transaction, do nothing.
+ if (--transaction_ref_count_ > 0) {
+ return;
+ }
+ DB_LOG_DEBUG(DB_DBG_TRACE_DETAIL, MYSQL_ROLLBACK);
+ checkUnusable();
+ if (mysql_rollback(mysql_) != 0) {
+ isc_throw(DbOperationError, "rollback failed: "
+ << mysql_error(mysql_));
+ }
+}
+
+} // namespace db
+} // namespace isc
diff --git a/src/lib/mysql/mysql_connection.h b/src/lib/mysql/mysql_connection.h
new file mode 100644
index 0000000..50ebc28
--- /dev/null
+++ b/src/lib/mysql/mysql_connection.h
@@ -0,0 +1,760 @@
+// Copyright (C) 2012-2022 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/.
+
+#ifndef MYSQL_CONNECTION_H
+#define MYSQL_CONNECTION_H
+
+#include <asiolink/io_service.h>
+#include <database/database_connection.h>
+#include <database/db_exceptions.h>
+#include <database/db_log.h>
+#include <exceptions/exceptions.h>
+#include <mysql/mysql_binding.h>
+#include <mysql/mysql_constants.h>
+#include <boost/scoped_ptr.hpp>
+#include <mysql.h>
+#include <mysqld_error.h>
+#include <errmsg.h>
+#include <functional>
+#include <vector>
+#include <stdint.h>
+
+namespace isc {
+namespace db {
+
+
+/// @brief Fetch and Release MySQL Results
+///
+/// When a MySQL statement is expected, to fetch the results the function
+/// mysql_stmt_fetch() must be called. As well as getting data, this
+/// allocates internal state. Subsequent calls to mysql_stmt_fetch can be
+/// made, but when all the data is retrieved, mysql_stmt_free_result must be
+/// called to free up the resources allocated.
+///
+/// Created prior to the first fetch, this class's destructor calls
+/// mysql_stmt_free_result, so eliminating the need for an explicit release
+/// in the method calling mysql_stmt_free_result. In this way, it guarantees
+/// that the resources are released even if the MySqlLeaseMgr method concerned
+/// exits via an exception.
+
+class MySqlFreeResult {
+public:
+
+ /// @brief Constructor
+ ///
+ /// Store the pointer to the statement for which data is being fetched.
+ ///
+ /// Note that according to the MySQL documentation, mysql_stmt_free_result
+ /// only releases resources if a cursor has been allocated for the
+ /// statement. This implies that it is a no-op if none have been. Either
+ /// way, any error from mysql_stmt_free_result is ignored. (Generating
+ /// an exception is not much help, as it will only confuse things if the
+ /// method calling mysql_stmt_fetch is exiting via an exception.)
+ MySqlFreeResult(MYSQL_STMT* statement) : statement_(statement)
+ {}
+
+ /// @brief Destructor
+ ///
+ /// Frees up fetch context if a fetch has been successfully executed.
+ ~MySqlFreeResult() {
+ (void) mysql_stmt_free_result(statement_);
+ }
+
+private:
+ MYSQL_STMT* statement_; ///< Statement for which results are freed
+};
+
+/// @brief MySQL Selection Statements
+///
+/// Each statement is associated with an index, which is used to reference the
+/// associated prepared statement.
+struct TaggedStatement {
+ uint32_t index;
+ const char* text;
+};
+
+/// @brief Retry on InnoDB deadlock.
+///
+/// When f(args) returns ER_LOCK_DEADLOCK f(args) is called again up to 5 times.
+///
+/// @tparam Fun Type of the function which must return an int.
+/// @tparam Args Types of arguments.
+/// @param fun The function to call.
+/// @param args Arguments.
+/// @return status (can be ER_LOCK_DEADLOCK after 5 retries).
+template <typename Fun, typename... Args>
+int retryOnDeadlock(Fun& fun, Args... args) {
+ int status;
+ for (unsigned count = 0; count < 5; ++count) {
+ status = fun(args...);
+ if (status != ER_LOCK_DEADLOCK) {
+ break;
+ }
+ }
+ return (status);
+}
+
+/// @brief Execute a prepared statement.
+///
+/// Call mysql_stmt_execute and retry on ER_LOCK_DEADLOCK.
+///
+/// @param stmt Statement to execute.
+/// @return status (can be ER_LOCK_DEADLOCK after 5 retries).
+inline int MysqlExecuteStatement(MYSQL_STMT* stmt) {
+ return (retryOnDeadlock(mysql_stmt_execute, stmt));
+}
+
+/// @brief Execute a literal statement.
+///
+/// Call mysql_query and retry on ER_LOCK_DEADLOCK.
+///
+/// @param mysql MySQL context.
+/// @param stmt Statement to execute.
+/// @return status (can be ER_LOCK_DEADLOCK after 5 retries).
+inline int MysqlQuery(MYSQL* mysql, const char* stmt) {
+ return (retryOnDeadlock(mysql_query, mysql, stmt));
+}
+
+/// @brief MySQL Handle Holder
+///
+/// Small RAII object for safer initialization, will close the database
+/// connection upon destruction. This means that if an exception is thrown
+/// during database initialization, resources allocated to the database are
+/// guaranteed to be freed.
+///
+/// It makes no sense to copy an object of this class. After the copy, both
+/// objects would contain pointers to the same MySql context object. The
+/// destruction of one would invalid the context in the remaining object.
+/// For this reason, the class is declared noncopyable.
+class MySqlHolder : public boost::noncopyable {
+public:
+
+ /// @brief Constructor
+ ///
+ /// Initialize MySql and store the associated context object.
+ ///
+ /// @throw DbOpenError Unable to initialize MySql handle.
+ MySqlHolder() : mysql_(mysql_init(NULL)) {
+ if (mysql_ == NULL) {
+ isc_throw(db::DbOpenError, "unable to initialize MySQL");
+ }
+ }
+
+ /// @brief Destructor
+ ///
+ /// Frees up resources allocated by the initialization of MySql.
+ ~MySqlHolder() {
+ if (mysql_ != NULL) {
+ mysql_close(mysql_);
+ }
+ }
+
+ /// @brief Conversion Operator
+ ///
+ /// Allows the MySqlHolder object to be passed as the context argument to
+ /// mysql_xxx functions.
+ operator MYSQL*() const {
+ return (mysql_);
+ }
+
+private:
+ /// @brief Variable used for its static property to call atexit() once.
+ static int atexit_;
+
+ /// @brief Initialization context
+ MYSQL* mysql_;
+};
+
+/// @brief Forward declaration to @ref MySqlConnection.
+class MySqlConnection;
+
+/// @brief RAII object representing MySQL transaction.
+///
+/// An instance of this class should be created in a scope where multiple
+/// INSERT statements should be executed within a single transaction. The
+/// transaction is started when the constructor of this class is invoked.
+/// The transaction is ended when the @ref MySqlTransaction::commit is
+/// explicitly called or when the instance of this class is destroyed.
+/// The @ref MySqlTransaction::commit commits changes to the database
+/// and the changes remain in the database when the instance of the
+/// class is destroyed. If the class instance is destroyed before the
+/// @ref MySqlTransaction::commit is called, the transaction is rolled
+/// back. The rollback on destruction guarantees that partial data is
+/// not stored in the database when there is an error during any
+/// of the operations belonging to a transaction.
+///
+/// The default MySQL backend configuration enables 'autocommit'.
+/// Starting a transaction overrides 'autocommit' setting for this
+/// particular transaction only. It does not affect the global 'autocommit'
+/// setting for the database connection, i.e. all modifications to the
+/// database which don't use transactions will still be auto committed.
+class MySqlTransaction : public boost::noncopyable {
+public:
+
+ /// @brief Constructor.
+ ///
+ /// Starts transaction by making a "START TRANSACTION" query.
+ ///
+ /// @param conn MySQL connection to use for the transaction. This
+ /// connection will be later used to commit or rollback changes.
+ ///
+ /// @throw DbOperationError if "START TRANSACTION" query fails.
+ MySqlTransaction(MySqlConnection& conn);
+
+ /// @brief Destructor.
+ ///
+ /// Rolls back the transaction if changes haven't been committed.
+ ~MySqlTransaction();
+
+ /// @brief Commits transaction.
+ void commit();
+
+private:
+
+ /// @brief Holds reference to the MySQL database connection.
+ MySqlConnection& conn_;
+
+ /// @brief Boolean flag indicating if the transaction has been committed.
+ ///
+ /// This flag is used in the class destructor to assess if the
+ /// transaction should be rolled back.
+ bool committed_;
+};
+
+
+/// @brief Common MySQL Connector Pool
+///
+/// This class provides common operations for MySQL database connection
+/// used by both MySqlLeaseMgr and MySqlHostDataSource. It manages connecting
+/// to the database and preparing compiled statements. Its fields are
+/// public, because they are used (both set and retrieved) in classes
+/// that use instances of MySqlConnection.
+class MySqlConnection : public db::DatabaseConnection {
+public:
+
+ /// @brief Function invoked to process fetched row.
+ typedef std::function<void(MySqlBindingCollection&)> ConsumeResultFun;
+
+ /// @brief Constructor
+ ///
+ /// Initialize MySqlConnection object with parameters needed for connection.
+ ///
+ /// @param parameters Specify the connection details.
+ /// @param io_accessor The IOService accessor function.
+ /// @param callback The connection recovery callback.
+ MySqlConnection(const ParameterMap& parameters,
+ IOServiceAccessorPtr io_accessor = IOServiceAccessorPtr(),
+ DbCallback callback = DbCallback())
+ : DatabaseConnection(parameters, callback),
+ io_service_accessor_(io_accessor), io_service_(),
+ transaction_ref_count_(0), tls_(false) {
+ }
+
+ /// @brief Destructor
+ virtual ~MySqlConnection();
+
+ /// @brief Get the schema version.
+ ///
+ /// @param parameters A data structure relating keywords and values
+ /// concerned with the database.
+ ///
+ /// @return Version number as a pair of unsigned integers. "first" is the
+ /// major version number, "second" the minor number.
+ ///
+ /// @throw isc::db::DbOperationError An operation on the open database has
+ /// failed.
+ static std::pair<uint32_t, uint32_t>
+ getVersion(const ParameterMap& parameters);
+
+ /// @brief Prepare Single Statement
+ ///
+ /// Creates a prepared statement from the text given and adds it to the
+ /// statements_ vector at the given index.
+ ///
+ /// @param index Index into the statements_ vector into which the text
+ /// should be placed. The vector must be big enough for the index
+ /// to be valid, else an exception will be thrown.
+ /// @param text Text of the SQL statement to be prepared.
+ ///
+ /// @throw isc::db::DbOperationError An operation on the open database has
+ /// failed.
+ /// @throw isc::InvalidParameter 'index' is not valid for the vector.
+ void prepareStatement(uint32_t index, const char* text);
+
+ /// @brief Prepare statements
+ ///
+ /// Creates the prepared statements for all of the SQL statements used
+ /// by the MySQL backend.
+ ///
+ /// @param start_statement Pointer to the first statement in range of the
+ /// statements to be compiled.
+ /// @param end_statement Pointer to the statement marking end of the
+ /// range of statements to be compiled. This last statement is not compiled.
+ ///
+ /// @throw isc::db::DbOperationError An operation on the open database has
+ /// failed.
+ /// @throw isc::InvalidParameter 'index' is not valid for the vector. This
+ /// represents an internal error within the code.
+ void prepareStatements(const TaggedStatement* start_statement,
+ const TaggedStatement* end_statement);
+
+ /// @brief Clears prepared statements and text statements.
+ void clearStatements();
+
+ /// @brief Open Database
+ ///
+ /// Opens the database using the information supplied in the parameters
+ /// passed to the constructor.
+ ///
+ /// @throw NoDatabaseName Mandatory database name not given
+ /// @throw DbOpenError Error opening the database
+ void openDatabase();
+
+ ///@{
+ /// The following methods are used to convert between times and time
+ /// intervals stored in the Lease object, and the times stored in the
+ /// database. The reason for the difference is because in the DHCP server,
+ /// the cltt (Client Time Since Last Transmission) is the natural data; in
+ /// the lease file - which may be read by the user - it is the expiry time
+ /// of the lease.
+
+ /// @brief Convert time_t value to database time.
+ ///
+ /// @param input_time A time_t value representing time.
+ /// @param output_time Reference to MYSQL_TIME object where converted time
+ /// will be put.
+ static
+ void convertToDatabaseTime(const time_t input_time, MYSQL_TIME& output_time);
+
+ /// @brief Convert Lease Time to Database Times
+ ///
+ /// Within the DHCP servers, times are stored as client last transmit time
+ /// and valid lifetime. In the database, the information is stored as
+ /// valid lifetime and "expire" (time of expiry of the lease). They are
+ /// related by the equation:
+ ///
+ /// - expire = client last transmit time + valid lifetime
+ ///
+ /// This method converts from the times in the lease object into times
+ /// able to be added to the database.
+ ///
+ /// @param cltt Client last transmit time
+ /// @param valid_lifetime Valid lifetime
+ /// @param expire Reference to MYSQL_TIME object where the expiry time of
+ /// the lease will be put.
+ ///
+ /// @throw isc::BadValue if the sum of the calculated expiration time is
+ /// greater than the value of @c LeaseMgr::MAX_DB_TIME.
+ static
+ void convertToDatabaseTime(const time_t cltt, const uint32_t valid_lifetime,
+ MYSQL_TIME& expire);
+
+ /// @brief Convert Database Time to Lease Times
+ ///
+ /// Within the database, time is stored as "expire" (time of expiry of the
+ /// lease) and valid lifetime. In the DHCP server, the information is
+ /// stored client last transmit time and valid lifetime. These are related
+ /// by the equation:
+ ///
+ /// - client last transmit time = expire - valid_lifetime
+ ///
+ /// This method converts from the times in the database into times
+ /// able to be inserted into the lease object.
+ ///
+ /// @param expire Reference to MYSQL_TIME object from where the expiry
+ /// time of the lease is taken.
+ /// @param valid_lifetime lifetime of the lease.
+ /// @param cltt Reference to location where client last transmit time
+ /// is put.
+ static
+ void convertFromDatabaseTime(const MYSQL_TIME& expire,
+ uint32_t valid_lifetime, time_t& cltt);
+ ///@}
+
+ /// @brief Starts new transaction
+ ///
+ /// This function begins a new transaction by sending the START TRANSACTION
+ /// statement to the database. The transaction should be explicitly committed
+ /// by calling @c commit() or rolled back by calling @c rollback(). MySQL
+ /// does not support nested transactions, and it implicitly commits a
+ /// current transaction when the new transaction begins. Therefore, this
+ /// function checks if a transaction has already started and does not start
+ /// a new transaction. However, it increments a transaction reference counter
+ /// which is later decremented when @c commit() or @c rollback() is called.
+ /// When this mechanism is used properly, it guarantees that nested
+ /// transactions are not attempted, thus avoiding implicit (unexpected)
+ /// commits of the pending transaction.
+ void startTransaction();
+
+ /// @brief Checks if there is a transaction in progress.
+ ///
+ /// @return true if a transaction has been started, false otherwise.
+ bool isTransactionStarted() const;
+
+ /// @brief Executes SELECT query using prepared statement.
+ ///
+ /// The statement index must point to an existing prepared statement
+ /// associated with the connection. The @c in_bindings size must match
+ /// the number of placeholders in the prepared statement. The size of
+ /// the @c out_bindings must match the number of selected columns. The
+ /// output bindings must be created and must encapsulate values of
+ /// the appropriate type, e.g. string, uint32_t etc.
+ ///
+ /// This method executes prepared statement using provided bindings and
+ /// calls @c process_result function for each returned row. The
+ /// @c process_result function is implemented by the caller and should
+ /// gather and store each returned row in an external data structure prior
+ /// to returning because the values in the @c out_bindings will be
+ /// overwritten by the values of the next returned row when this function
+ /// is called again.
+ ///
+ /// @tparam StatementIndex Type of the statement index enum.
+ ///
+ /// @param index Index of the query to be executed.
+ /// @param in_bindings Input bindings holding values to substitue placeholders
+ /// in the query.
+ /// @param [out] out_bindings Output bindings where retrieved data will be
+ /// stored.
+ /// @param process_result Pointer to the function to be invoked for each
+ /// retrieved row. This function consumes the retrieved data from the
+ /// output bindings.
+ template<typename StatementIndex>
+ void selectQuery(const StatementIndex& index,
+ const MySqlBindingCollection& in_bindings,
+ MySqlBindingCollection& out_bindings,
+ ConsumeResultFun process_result) {
+ checkUnusable();
+ // Extract native input bindings.
+ std::vector<MYSQL_BIND> in_bind_vec;
+ for (MySqlBindingPtr in_binding : in_bindings) {
+ in_bind_vec.push_back(in_binding->getMySqlBinding());
+ }
+
+ int status = 0;
+ if (!in_bind_vec.empty()) {
+ // Bind parameters to the prepared statement.
+ status = mysql_stmt_bind_param(statements_[index],
+ in_bind_vec.empty() ? 0 : &in_bind_vec[0]);
+ checkError(status, index, "unable to bind parameters for select");
+ }
+
+ // Bind variables that will receive results as well.
+ std::vector<MYSQL_BIND> out_bind_vec;
+ for (MySqlBindingPtr out_binding : out_bindings) {
+ out_bind_vec.push_back(out_binding->getMySqlBinding());
+ }
+ if (!out_bind_vec.empty()) {
+ status = mysql_stmt_bind_result(statements_[index], &out_bind_vec[0]);
+ checkError(status, index, "unable to bind result parameters for select");
+ }
+
+ // Execute query.
+ status = MysqlExecuteStatement(statements_[index]);
+ checkError(status, index, "unable to execute");
+
+ status = mysql_stmt_store_result(statements_[index]);
+ checkError(status, index, "unable to set up for storing all results");
+
+ // Fetch results.
+ MySqlFreeResult fetch_release(statements_[index]);
+ while ((status = mysql_stmt_fetch(statements_[index])) ==
+ MLM_MYSQL_FETCH_SUCCESS) {
+ try {
+ // For each returned row call user function which should
+ // consume the row and copy the data to a safe place.
+ process_result(out_bindings);
+
+ } catch (const std::exception& ex) {
+ // Rethrow the exception with a bit more data.
+ isc_throw(BadValue, ex.what() << ". Statement is <" <<
+ text_statements_[index] << ">");
+ }
+ }
+
+ // How did the fetch end?
+ // If mysql_stmt_fetch return value is equal to 1 an error occurred.
+ if (status == MLM_MYSQL_FETCH_FAILURE) {
+ // Error - unable to fetch results
+ checkError(status, index, "unable to fetch results");
+
+ } else if (status == MYSQL_DATA_TRUNCATED) {
+ // Data truncated - throw an exception indicating what was at fault
+ isc_throw(DataTruncated, text_statements_[index]
+ << " returned truncated data");
+ }
+ }
+
+ /// @brief Executes INSERT prepared statement.
+ ///
+ /// The statement index must point to an existing prepared statement
+ /// associated with the connection. The @c in_bindings size must match
+ /// the number of placeholders in the prepared statement.
+ ///
+ /// This method executes prepared statement using provided bindings to
+ /// insert data into the database.
+ ///
+ /// @tparam StatementIndex Type of the statement index enum.
+ ///
+ /// @param index Index of the query to be executed.
+ /// @param in_bindings Input bindings holding values to substitue placeholders
+ /// in the query.
+ template<typename StatementIndex>
+ void insertQuery(const StatementIndex& index,
+ const MySqlBindingCollection& in_bindings) {
+ checkUnusable();
+ std::vector<MYSQL_BIND> in_bind_vec;
+ for (MySqlBindingPtr in_binding : in_bindings) {
+ in_bind_vec.push_back(in_binding->getMySqlBinding());
+ }
+
+ // Bind the parameters to the statement
+ int status = mysql_stmt_bind_param(statements_[index],
+ in_bind_vec.empty() ? 0 : &in_bind_vec[0]);
+ checkError(status, index, "unable to bind parameters");
+
+ // Execute the statement
+ status = MysqlExecuteStatement(statements_[index]);
+
+ if (status != 0) {
+ // Failure: check for the special case of duplicate entry.
+ if (mysql_errno(mysql_) == ER_DUP_ENTRY) {
+ isc_throw(DuplicateEntry, "Database duplicate entry error");
+ }
+ // Failure: check for the special case of WHERE returning NULL.
+ if (mysql_errno(mysql_) == ER_BAD_NULL_ERROR) {
+ isc_throw(NullKeyError, "Database bad NULL error");
+ }
+ checkError(status, index, "unable to execute");
+ }
+ }
+
+ /// @brief Executes UPDATE or DELETE prepared statement and returns
+ /// the number of affected rows.
+ ///
+ /// The statement index must point to an existing prepared statement
+ /// associated with the connection. The @c in_bindings size must match
+ /// the number of placeholders in the prepared statement.
+ ///
+ /// @tparam StatementIndex Type of the statement index enum.
+ ///
+ /// @param index Index of the query to be executed.
+ /// @param in_bindings Input bindings holding values to substitute placeholders
+ /// in the query.
+ ///
+ /// @return Number of affected rows.
+ template<typename StatementIndex>
+ uint64_t updateDeleteQuery(const StatementIndex& index,
+ const MySqlBindingCollection& in_bindings) {
+ checkUnusable();
+ std::vector<MYSQL_BIND> in_bind_vec;
+ for (MySqlBindingPtr in_binding : in_bindings) {
+ in_bind_vec.push_back(in_binding->getMySqlBinding());
+ }
+
+ // Bind the parameters to the statement
+ int status = mysql_stmt_bind_param(statements_[index],
+ in_bind_vec.empty() ? 0 : &in_bind_vec[0]);
+ checkError(status, index, "unable to bind parameters");
+
+ // Execute the statement
+ status = MysqlExecuteStatement(statements_[index]);
+
+ if (status != 0) {
+ // Failure: check for the special case of duplicate entry.
+ if ((mysql_errno(mysql_) == ER_DUP_ENTRY)
+#ifdef ER_FOREIGN_DUPLICATE_KEY
+ || (mysql_errno(mysql_) == ER_FOREIGN_DUPLICATE_KEY)
+#endif
+#ifdef ER_FOREIGN_DUPLICATE_KEY_WITH_CHILD_INFO
+ || (mysql_errno(mysql_) == ER_FOREIGN_DUPLICATE_KEY_WITH_CHILD_INFO)
+#endif
+#ifdef ER_FOREIGN_DUPLICATE_KEY_WITHOUT_CHILD_INFO
+ || (mysql_errno(mysql_) == ER_FOREIGN_DUPLICATE_KEY_WITHOUT_CHILD_INFO)
+#endif
+ ) {
+ isc_throw(DuplicateEntry, "Database duplicate entry error");
+ }
+ checkError(status, index, "unable to execute");
+ }
+
+ // Let's return how many rows were affected.
+ return (static_cast<uint64_t>(mysql_stmt_affected_rows(statements_[index])));
+ }
+
+ /// @brief Commits current transaction
+ ///
+ /// Commits all pending database operations. On databases that don't
+ /// support transactions, this is a no-op.
+ ///
+ /// When this method is called for a nested transaction it decrements the
+ /// transaction reference counter incremented during the call to
+ /// @c startTransaction.
+ ///
+ /// @throw DbOperationError If the commit failed.
+ void commit();
+
+ /// @brief Rollbacks current transaction
+ ///
+ /// Rolls back all pending database operations. On databases that don't
+ /// support transactions, this is a no-op.
+ ///
+ /// When this method is called for a nested transaction it decrements the
+ /// transaction reference counter incremented during the call to
+ /// @c startTransaction.
+ ///
+ /// @throw DbOperationError If the rollback failed.
+ void rollback();
+
+ /// @brief Check Error and Throw Exception
+ ///
+ /// Virtually all MySQL functions return a status which, if non-zero,
+ /// indicates an error. This function centralizes the error checking
+ /// code.
+ ///
+ /// It is used to determine whether or not the function succeeded, and
+ /// in the event of failures, decide whether or not those failures are
+ /// recoverable.
+ ///
+ /// If the error is recoverable, the function will throw a DbOperationError.
+ /// If the error is deemed unrecoverable, such as a loss of connectivity
+ /// with the server, the function will call startRecoverDbConnection() which
+ /// will start the connection recovery.
+ ///
+ /// If the invocation returns true, this indicates the calling layer will
+ /// attempt recovery, and the function throws a DbOperationError to allow
+ /// the caller to error handle the failed db access attempt.
+ ///
+ /// @param status Status code: non-zero implies an error
+ /// @param index Index of statement that caused the error
+ /// @param what High-level description of the error
+ ///
+ /// @tparam Enumeration representing index of a statement to which an
+ /// error pertains.
+ ///
+ /// @throw isc::db::DbOperationError An operation on the open database has
+ /// failed.
+ template<typename StatementIndex>
+ void checkError(const int status, const StatementIndex& index,
+ const char* what) {
+ if (status != 0) {
+ switch(mysql_errno(mysql_)) {
+ // These are the ones we consider fatal. Remember this method is
+ // used to check errors of API calls made subsequent to successfully
+ // connecting. Errors occurring while attempting to connect are
+ // checked in the connection code. An alternative would be to call
+ // mysql_ping() - assuming autoreconnect is off. If that fails
+ // then we know connection is toast.
+ case CR_SERVER_GONE_ERROR:
+ case CR_SERVER_LOST:
+ case CR_OUT_OF_MEMORY:
+ case CR_CONNECTION_ERROR: {
+ DB_LOG_ERROR(db::MYSQL_FATAL_ERROR)
+ .arg(what)
+ .arg(text_statements_[static_cast<int>(index)])
+ .arg(mysql_error(mysql_))
+ .arg(mysql_errno(mysql_));
+
+ // Mark this connection as no longer usable.
+ markUnusable();
+
+ // Start the connection recovery.
+ startRecoverDbConnection();
+
+ // We still need to throw so caller can error out of the current
+ // processing.
+ isc_throw(db::DbConnectionUnusable,
+ "fatal database error or connectivity lost");
+ }
+ default:
+ // Connection is ok, so it must be an SQL error
+ isc_throw(db::DbOperationError, what << " for <"
+ << text_statements_[static_cast<int>(index)]
+ << ">, reason: "
+ << mysql_error(mysql_) << " (error code "
+ << mysql_errno(mysql_) << ")");
+ }
+ }
+ }
+
+ /// @brief The recover connection
+ ///
+ /// This function starts the recover process of the connection.
+ ///
+ /// @note The recover function must be run on the IO Service thread.
+ void startRecoverDbConnection() {
+ if (callback_) {
+ if (!io_service_ && io_service_accessor_) {
+ io_service_ = (*io_service_accessor_)();
+ io_service_accessor_.reset();
+ }
+
+ if (io_service_) {
+ io_service_->post(std::bind(callback_, reconnectCtl()));
+ }
+ }
+ }
+
+ /// @brief Get the TLS flag.
+ ///
+ /// @return True if TLS was required, false otherwise.
+ bool getTls() const {
+ return (tls_);
+ }
+
+ /// @brief Get the TLS cipher.
+ ///
+ /// This method is used to check if required TLS was setup.
+ std::string getTlsCipher() {
+ const char* cipher = mysql_get_ssl_cipher(mysql_);
+ return (cipher ? std::string(cipher) : "");
+ }
+
+ /// @brief Prepared statements
+ ///
+ /// This field is public, because it is used heavily from MySqlConnection
+ /// and will be from MySqlHostDataSource.
+ std::vector<MYSQL_STMT*> statements_;
+
+ /// @brief Raw text of statements
+ ///
+ /// This field is public, because it is used heavily from MySqlConnection
+ /// and will be from MySqlHostDataSource.
+ std::vector<std::string> text_statements_;
+
+ /// @brief MySQL connection handle
+ ///
+ /// This field is public, because it is used heavily from MySqlConnection
+ /// and will be from MySqlHostDataSource.
+ MySqlHolder mysql_;
+
+ /// @brief Accessor function which returns the IOService that can be used to
+ /// recover the connection.
+ ///
+ /// This accessor is used to lazy retrieve the IOService when the connection
+ /// is lost. It is useful to retrieve it at a later time to support hook
+ /// libraries which create managers on load and set IOService later on by
+ /// using the dhcp4_srv_configured and dhcp6_srv_configured hooks.
+ IOServiceAccessorPtr io_service_accessor_;
+
+ /// @brief IOService object, used for all ASIO operations.
+ isc::asiolink::IOServicePtr io_service_;
+
+ /// @brief Reference counter for transactions.
+ ///
+ /// It precludes starting and committing nested transactions. MySQL
+ /// implicitly commits current transaction when new transaction is
+ /// started. We want to not start new transactions when one is already
+ /// in progress.
+ int transaction_ref_count_;
+
+ /// @brief TLS flag (true when TLS was required, false otherwise).
+ bool tls_;
+};
+
+} // end of isc::db namespace
+} // end of isc namespace
+
+#endif // MYSQL_CONNECTION_H
diff --git a/src/lib/mysql/mysql_constants.h b/src/lib/mysql/mysql_constants.h
new file mode 100644
index 0000000..f7f38b9
--- /dev/null
+++ b/src/lib/mysql/mysql_constants.h
@@ -0,0 +1,64 @@
+// Copyright (C) 2018-2022 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/.
+
+#ifndef MYSQL_CONSTANTS_H
+#define MYSQL_CONSTANTS_H
+
+#include <mysql.h>
+
+namespace isc {
+namespace db {
+
+/// @name MySQL constants.
+///
+//@{
+
+/// @brief my_bools type for vectors.
+/// @note vector<bool> is specialized into a bitset, so vector<char>
+/// must be used instead
+typedef char my_bools;
+
+#ifdef HAVE_MYSQL_MY_BOOL
+/// @brief MySQL false value.
+const my_bool MLM_FALSE = 0;
+
+/// @brief MySQL true value.
+const my_bool MLM_TRUE = 1;
+
+#else
+/// @brief my_bool type in MySQL 8.x.
+typedef bool my_bool;
+
+/// @brief MySQL false value.
+const my_bool MLM_FALSE = false;
+
+/// @brief MySQL true value.
+const my_bool MLM_TRUE = true;
+#endif
+
+///@brief check for bool size
+static_assert(sizeof(my_bool) == sizeof(char), "unsupported bool size");
+
+/// @brief MySQL fetch success code.
+const int MLM_MYSQL_FETCH_SUCCESS = 0;
+
+/// @brief MySQL fetch failure code.
+const int MLM_MYSQL_FETCH_FAILURE = 0;
+
+//@}
+
+/// @name Current database schema version values.
+//@{
+const uint32_t MYSQL_SCHEMA_VERSION_MAJOR = 14;
+const uint32_t MYSQL_SCHEMA_VERSION_MINOR = 0;
+
+//@}
+
+
+} // end of namespace isc::db
+} // end of namespace isc
+
+#endif
diff --git a/src/lib/mysql/tests/Makefile.am b/src/lib/mysql/tests/Makefile.am
new file mode 100644
index 0000000..f11254e
--- /dev/null
+++ b/src/lib/mysql/tests/Makefile.am
@@ -0,0 +1,40 @@
+SUBDIRS = .
+
+AM_CPPFLAGS = -I$(top_builddir)/src/lib -I$(top_srcdir)/src/lib
+AM_CPPFLAGS += $(BOOST_INCLUDES) $(MYSQL_CPPFLAGS)
+
+AM_CXXFLAGS = $(KEA_CXXFLAGS)
+
+if USE_STATIC_LINK
+AM_LDFLAGS = -static
+endif
+
+CLEANFILES = *.gcno *.gcda
+
+TESTS_ENVIRONMENT = \
+ $(LIBTOOL) --mode=execute $(VALGRIND_COMMAND)
+
+TESTS =
+if HAVE_GTEST
+TESTS += libmysql_unittests
+
+libmysql_unittests_SOURCES = mysql_binding_unittest.cc
+libmysql_unittests_SOURCES += mysql_connection_unittest.cc
+libmysql_unittests_SOURCES += run_unittests.cc
+
+libmysql_unittests_CPPFLAGS = $(AM_CPPFLAGS) $(GTEST_INCLUDES)
+libmysql_unittests_LDFLAGS = $(AM_LDFLAGS) $(GTEST_LDFLAGS) $(MYSQL_LIBS)
+
+libmysql_unittests_LDADD = $(top_builddir)/src/lib/mysql/testutils/libmysqltest.la
+libmysql_unittests_LDADD += $(top_builddir)/src/lib/mysql/libkea-mysql.la
+libmysql_unittests_LDADD += $(top_builddir)/src/lib/database/libkea-database.la
+libmysql_unittests_LDADD += $(top_builddir)/src/lib/cc/libkea-cc.la
+libmysql_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la
+libmysql_unittests_LDADD += $(top_builddir)/src/lib/log/libkea-log.la
+libmysql_unittests_LDADD += $(top_builddir)/src/lib/util/libkea-util.la
+libmysql_unittests_LDADD += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
+libmysql_unittests_LDADD += $(LOG4CPLUS_LIBS) $(BOOST_LIBS) $(GTEST_LDADD)
+
+endif
+
+noinst_PROGRAMS = $(TESTS)
diff --git a/src/lib/mysql/tests/Makefile.in b/src/lib/mysql/tests/Makefile.in
new file mode 100644
index 0000000..d9ae160
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+
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+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/lib/mysql/tests/mysql_binding_unittest.cc b/src/lib/mysql/tests/mysql_binding_unittest.cc
new file mode 100644
index 0000000..331dfa8
--- /dev/null
+++ b/src/lib/mysql/tests/mysql_binding_unittest.cc
@@ -0,0 +1,249 @@
+// Copyright (C) 2018-2019 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 <asiolink/io_address.h>
+#include <exceptions/exceptions.h>
+#include <mysql/mysql_binding.h>
+#include <util/optional.h>
+#include <boost/date_time/gregorian/gregorian.hpp>
+#include <boost/date_time/posix_time/posix_time.hpp>
+#include <gtest/gtest.h>
+
+using namespace isc;
+using namespace isc::asiolink;
+using namespace isc::data;
+using namespace isc::db;
+using namespace isc::util;
+
+namespace {
+
+// This test verifies that default string is returned if binding is null.
+TEST(MySqlBindingTest, defaultString) {
+ auto binding = MySqlBinding::createNull();
+ EXPECT_EQ("foo", binding->getStringOrDefault("foo"));
+
+ binding = MySqlBinding::createString("bar");
+ ASSERT_FALSE(binding->amNull());
+ EXPECT_EQ("bar", binding->getStringOrDefault("foo"));
+}
+
+// This test verifies that null binding is created for unspecified string
+// and the string binding is created for a specified string.
+TEST(MySqlBindingTest, conditionalString) {
+ auto binding = MySqlBinding::condCreateString(Optional<std::string>());
+ EXPECT_TRUE(binding->amNull());
+
+ binding = MySqlBinding::condCreateString("foo");
+ ASSERT_FALSE(binding->amNull());
+ EXPECT_EQ("foo", binding->getString());
+}
+
+// This test verifies that empty string is stored in the database.
+TEST(MySqlBindingTest, emptyString) {
+ auto binding = MySqlBinding::condCreateString(Optional<std::string>(""));
+ ASSERT_FALSE(binding->amNull());
+ EXPECT_TRUE(binding->getString().empty());
+}
+
+// This test verifies that an error is thrown upon an attempt to use
+// invalid accessor for a string binding.
+TEST(MySqlBindingTest, stringTypeMismatch) {
+ auto binding = MySqlBinding::createString("foo");
+ EXPECT_NO_THROW(static_cast<void>(binding->getString()));
+
+ EXPECT_THROW(static_cast<void>(binding->getBlob()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getInteger<uint16_t>()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getFloat()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getBool()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getTimestamp()), InvalidOperation);
+}
+
+// This test verifies that null JSON is returned if the string binding
+// is null, JSON value is returned when string value is valid JSON and
+// that exception is thrown if the string is not a valid JSON.
+TEST(MySqlBindingTest, getJSON) {
+ auto binding = MySqlBinding::createNull();
+ EXPECT_FALSE(binding->getJSON());
+
+ binding = MySqlBinding::createString("{ \"foo\": \"bar\" }");
+ auto json = binding->getJSON();
+ ASSERT_TRUE(json);
+ ASSERT_EQ(Element::map, json->getType());
+ auto foo = json->get("foo");
+ ASSERT_TRUE(foo);
+ ASSERT_EQ(Element::string, foo->getType());
+ EXPECT_EQ("bar", foo->stringValue());
+}
+
+// This test verifies that default blob is returned if binding is null.
+TEST(MySqlBindingTest, defaultBlob) {
+ std::vector<uint8_t> blob(10, 1);
+ std::vector<uint8_t> default_blob(10, 5);
+ auto binding = MySqlBinding::createNull();
+ EXPECT_EQ(default_blob, binding->getBlobOrDefault(default_blob));
+
+ binding = MySqlBinding::createBlob(blob.begin(), blob.end());
+ EXPECT_EQ(blob, binding->getBlobOrDefault(default_blob));
+}
+
+// This test verifies that an error is thrown upon an attempt to use
+// invalid accessor for a blob binding.
+TEST(MySqlBindingTest, blobTypeMismatch) {
+ std::vector<uint8_t> blob(10, 1);
+ auto binding = MySqlBinding::createBlob(blob.begin(), blob.end());
+ EXPECT_NO_THROW(static_cast<void>(binding->getBlob()));
+
+ EXPECT_THROW(static_cast<void>(binding->getString()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getInteger<uint16_t>()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getFloat()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getBool()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getTimestamp()), InvalidOperation);
+}
+
+// This test verifies that default number is returned if binding is null.
+TEST(MySqlBindingTest, defaultInteger) {
+ auto binding = MySqlBinding::createNull();
+ ASSERT_TRUE(binding->amNull());
+ EXPECT_EQ(123, binding->getIntegerOrDefault<uint32_t>(123));
+
+ binding = MySqlBinding::createInteger<uint32_t>(1024);
+ ASSERT_FALSE(binding->amNull());
+ EXPECT_EQ(1024, binding->getIntegerOrDefault<uint32_t>(123));
+}
+
+// This test verifies that null binding is created for unspecified number
+// and the integer binding is created for a specified number.
+TEST(MySqlBindingTest, conditionalInteger) {
+ auto binding = MySqlBinding::condCreateInteger<uint16_t>(Optional<uint16_t>());
+ EXPECT_TRUE(binding->amNull());
+
+ binding = MySqlBinding::condCreateInteger<uint16_t>(1);
+ ASSERT_FALSE(binding->amNull());
+ EXPECT_EQ(1, binding->getInteger<uint16_t>());
+}
+
+// This test verifies that an error is thrown upon an attempt to use
+// invalid accessor for an integer binding.
+TEST(MySqlBindingTest, integerTypeMismatch) {
+ auto binding = MySqlBinding::createInteger<uint32_t>(123);
+ EXPECT_NO_THROW(static_cast<void>(binding->getInteger<uint32_t>()));
+
+ EXPECT_THROW(static_cast<void>(binding->getString()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getBlob()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getInteger<uint8_t>()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getInteger<uint16_t>()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getFloat()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getBool()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getTimestamp()), InvalidOperation);
+}
+
+// This test verifies that null binding is created for unspecified floating
+// point value and the float binding is created for the specified value.
+TEST(MySqlBindingTest, conditionalFloat) {
+ auto binding = MySqlBinding::condCreateFloat(Optional<float>());
+ EXPECT_TRUE(binding->amNull());
+
+ binding = MySqlBinding::condCreateFloat<float>(1.567f);
+ ASSERT_FALSE(binding->amNull());
+ EXPECT_EQ(1.567f, binding->getFloat());
+}
+
+// This test verifies that an error is thrown upon an attempt to use
+// invalid accessor for a float binding.
+TEST(MySqlBindingTest, floatTypeMismatch) {
+ auto binding = MySqlBinding::createFloat(123.123f);
+ EXPECT_NO_THROW(static_cast<void>(binding->getFloat()));
+
+ EXPECT_THROW(static_cast<void>(binding->getString()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getBlob()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getInteger<uint8_t>()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getInteger<uint16_t>()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getInteger<uint32_t>()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getBool()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getTimestamp()), InvalidOperation);
+}
+
+// This test verifies that null binding is created for unspecified boolean
+// value and the uint8_t binding is created for a specified boolean
+// value.
+TEST(MySqlBindingTest, conditionalBoolean) {
+ auto binding = MySqlBinding::condCreateBool(Optional<bool>());
+ EXPECT_TRUE(binding->amNull());
+
+ binding = MySqlBinding::condCreateBool(false);
+ ASSERT_FALSE(binding->amNull());
+ EXPECT_FALSE(binding->getBool());
+
+ binding = MySqlBinding::condCreateBool(true);
+ ASSERT_FALSE(binding->amNull());
+ EXPECT_TRUE(binding->getBool());
+}
+
+// This test verifies that an error is thrown upon an attempt to use
+// invalid accessor for a float binding.
+TEST(MySqlBindingTest, booleanTypeMismatch) {
+ auto binding = MySqlBinding::createBool(false);
+ EXPECT_NO_THROW(static_cast<void>(binding->getBool()));
+ EXPECT_NO_THROW(static_cast<void>(binding->getInteger<uint8_t>()));
+
+ EXPECT_THROW(static_cast<void>(binding->getString()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getBlob()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getInteger<uint16_t>()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getInteger<uint32_t>()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getFloat()), InvalidOperation);
+ EXPECT_THROW(static_cast<void>(binding->getTimestamp()), InvalidOperation);
+}
+
+// This test verifies that null binding is created for unspecified address
+// and the uint32_t binding is created for the specified address.
+TEST(MySqlBindingTest, conditionalIPv4Address) {
+ auto binding = MySqlBinding::condCreateIPv4Address(Optional<IOAddress>());
+ EXPECT_TRUE(binding->amNull());
+
+ binding = MySqlBinding::condCreateIPv4Address(IOAddress("192.0.2.1"));
+ ASSERT_FALSE(binding->amNull());
+ EXPECT_EQ(0xC0000201, binding->getInteger<uint32_t>());
+
+ EXPECT_THROW(MySqlBinding::condCreateIPv4Address(IOAddress("2001:db8:1::1")),
+ isc::BadValue);
+}
+
+// This test verifies that default timestamp is returned if binding is null.
+TEST(MySqlBindingTest, defaultTimestamp) {
+ boost::posix_time::ptime current_time = boost::posix_time::second_clock::local_time();
+ boost::posix_time::ptime past_time = current_time - boost::posix_time::hours(1);
+
+ auto binding = MySqlBinding::createNull();
+ EXPECT_TRUE(past_time == binding->getTimestampOrDefault(past_time));
+
+ binding = MySqlBinding::createTimestamp(current_time);
+ EXPECT_TRUE(current_time == binding->getTimestampOrDefault(past_time));
+}
+
+// This test verifies that the binding preserves fractional seconds in
+// millisecond precision.
+/// @todo This test is disabled until we decide that the minimum
+/// supported MySQL version has a fractional seconds precision.
+TEST(MySqlBindingTest, DISABLED_millisecondTimestampPrecision) {
+ // Set timestamp of 2019-01-28 01:12:10.123
+
+ // Fractional part depends on the clock resolution.
+ long fractional = 123*(boost::posix_time::time_duration::ticks_per_second()/1000);
+ boost::posix_time::ptime
+ test_time(boost::gregorian::date(2019, boost::gregorian::Jan, 28),
+ boost::posix_time::time_duration(1, 12, 10, fractional));
+
+ auto binding = MySqlBinding::createTimestamp(test_time);
+
+ boost::posix_time::ptime returned_test_time = binding->getTimestamp();
+
+ EXPECT_EQ(returned_test_time, test_time);
+}
+
+}
+
diff --git a/src/lib/mysql/tests/mysql_connection_unittest.cc b/src/lib/mysql/tests/mysql_connection_unittest.cc
new file mode 100644
index 0000000..19d1a6a
--- /dev/null
+++ b/src/lib/mysql/tests/mysql_connection_unittest.cc
@@ -0,0 +1,789 @@
+// Copyright (C) 2018-2022 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 <mysql/mysql_connection.h>
+#include <mysql/testutils/mysql_schema.h>
+#include <testutils/gtest_utils.h>
+
+#include <array>
+
+#include <gtest/gtest.h>
+
+#include <boost/date_time/posix_time/posix_time.hpp>
+
+using namespace isc::db;
+using namespace isc::db::test;
+
+namespace {
+
+/// @brief RAII wrapper over MYSQL_RES obtained from MySQL library functions like
+/// mysql_use_result().
+struct MySqlResult {
+ MySqlResult(MYSQL_RES* result) : result_(result) {
+ }
+
+ ~MySqlResult() {
+ mysql_free_result(result_);
+ }
+
+ MYSQL_RES* const result_;
+};
+
+/// @brief Test fixture class for @c MySqlConnection class.
+class MySqlConnectionTest : public ::testing::Test {
+public:
+
+ /// @brief Indexes of prepared statements used within the tests.
+ enum StatementIndex {
+ GET_BY_INT_VALUE,
+ DELETE_BY_INT_VALUE,
+ INSERT_VALUE,
+ NUM_STATEMENTS
+ };
+
+ /// @brief Array of tagged MySQL statements.
+ typedef std::array<TaggedStatement, NUM_STATEMENTS> TaggedStatementArray;
+
+ /// @brief Prepared MySQL statements used in the tests.
+ TaggedStatementArray tagged_statements = {{
+ { GET_BY_INT_VALUE,
+ "SELECT tinyint_value, int_value, bigint_value, string_value,"
+ " blob_value, timestamp_value"
+ " FROM mysql_connection_test WHERE int_value = ?" },
+
+ { DELETE_BY_INT_VALUE,
+ "DELETE FROM mysql_connection_test WHERE int_value = ?" },
+
+ { INSERT_VALUE,
+ "INSERT INTO mysql_connection_test (tinyint_value, int_value,"
+ "bigint_value, string_value, blob_value, timestamp_value)"
+ " VALUES (?, ?, ?, ?, ?, ?)" }
+ }};
+
+ /// @brief Constructor.
+ ///
+ /// Re-creates database schema, opens new database connection and creates
+ /// prepared statements used in tests. Created schema contains a test
+ /// table @c mysql_connection_test which includes 6 columns of various
+ /// types.
+ MySqlConnectionTest(bool const primary_key = false)
+ : conn_(DatabaseConnection::parse(validMySQLConnectionString())) {
+
+ try {
+ // Open new connection.
+ conn_.openDatabase();
+
+ // Create mysql_connection_test table.
+ createTestTable(primary_key);
+
+ // In Percona XtraDB cluster, you can't do much on tables with
+ // primary keys. So far the connection and the table creation have
+ // been tested. Continue only if:
+ // * we are in primary key mode
+ // * a MySQL database other than Percona is running
+ // * Percona's pxc_strict_mode is set to "DISABLED" or "PERMISSIVE"
+ // The last two checks are done with inverse logic against the two
+ // modes that restrict this: "ENFORCING" and "MASTER". This check is
+ // to be paired inside the tests without a primary key to disable
+ // those tests.
+ if (!primary_key &&
+ (showPxcStrictMode() == "ENFORCING" || showPxcStrictMode() == "MASTER")) {
+ return;
+ }
+
+ // Created prepared statements for basic queries to test table.
+ conn_.prepareStatements(tagged_statements.begin(),
+ tagged_statements.end());
+ } catch (...) {
+ std::cerr << "*** ERROR: unable to open database. The test\n"
+ "*** environment is broken and must be fixed before\n"
+ "*** the MySQL tests will run correctly.\n"
+ "*** The reason for the problem is described in the\n"
+ "*** accompanying exception output.\n";
+ throw;
+ }
+ }
+
+ /// @brief Destructor
+ ///
+ /// Removes test table from the database.
+ virtual ~MySqlConnectionTest() {
+ if (conn_.isTransactionStarted()) {
+ conn_.rollback();
+ }
+ dropTestTable();
+ }
+
+ /// @brief Creates test table @c mysql_connection_test.
+ ///
+ /// The new table contains 6 columns of various data types. All of
+ /// the columns accept null values.
+ void createTestTable(bool const primary_key = false) {
+ /// @todo TIMESTAMP value lacks sub second precision because
+ /// it is supported since MySQL 5.6.4, which is still not a
+ /// default version on some OSes. When the subsecond precision
+ /// is available on all OSes that Kea supports, the timestamp
+ /// column should be turned to TIMESTAMP(6). Until then, it
+ /// must remain TIMESTAMP.
+ runQuery("CREATE TABLE IF NOT EXISTS mysql_connection_test ("
+ "tinyint_value TINYINT " +
+ std::string(primary_key ? "PRIMARY KEY NOT NULL," : "NULL,") +
+ "int_value INT NULL,"
+ "bigint_value BIGINT NULL,"
+ "string_value TEXT NULL,"
+ "blob_value BLOB NULL,"
+ "timestamp_value TIMESTAMP NULL"
+ ")");
+ }
+
+ /// @brief Drops test table.
+ void dropTestTable() {
+ runQuery("DROP TABLE IF EXISTS mysql_connection_test");
+ }
+
+ /// @brief Runs MySQL query on the opened connection.
+ ///
+ /// @param sql Query in the textual form.
+ void runQuery(const std::string& sql) {
+ MYSQL_STMT *stmt = mysql_stmt_init(conn_.mysql_);
+ if (stmt == NULL) {
+ isc_throw(DbOperationError, "unable to allocate MySQL prepared "
+ "statement structure, reason: " << mysql_error(conn_.mysql_));
+ }
+
+ int status = mysql_stmt_prepare(stmt, sql.c_str(), sql.length());
+ if (status != 0) {
+ isc_throw(DbOperationError, "unable to prepare MySQL statement <"
+ << sql << ">, reason: " << mysql_errno(conn_.mysql_));
+ }
+
+ // Execute the prepared statement.
+ if (MysqlExecuteStatement(stmt) != 0) {
+ isc_throw(DbOperationError, "cannot execute MySQL query <"
+ << sql << ">, reason: " << mysql_errno(conn_.mysql_));
+ }
+
+ // Discard the statement and its resources
+ mysql_stmt_close(stmt);
+ }
+
+
+ /// @brief Tests inserting and retrieving data from the database.
+ ///
+ /// In this test data carried in the bindings is inserted into the database.
+ /// Then this data is retrieved from the database and compared with the
+ /// orginal.
+ ///
+ /// @param in_bindings Collection of bindings encapsulating the data to
+ /// be inserted into the database and then retrieved.
+ void testInsertSelect(const MySqlBindingCollection& in_bindings) {
+ // Expecting 6 bindings because we have 6 columns in our table.
+ ASSERT_EQ(6, in_bindings.size());
+ // We are going to select by int_value so this value must not be null.
+ ASSERT_FALSE(in_bindings[1]->amNull());
+
+ // Store data in the database.
+ ASSERT_NO_THROW_LOG(conn_.insertQuery(MySqlConnectionTest::INSERT_VALUE,
+ in_bindings));
+
+ // Create input binding for select query.
+ MySqlBindingCollection bindings =
+ { MySqlBinding::createInteger<uint32_t>(in_bindings[1]->getInteger<uint32_t>()) };
+
+ // Also, create output (placeholder) bindings for receiving data.
+ MySqlBindingCollection out_bindings = {
+ MySqlBinding::createInteger<uint8_t>(),
+ MySqlBinding::createInteger<uint32_t>(),
+ MySqlBinding::createInteger<int64_t>(),
+ MySqlBinding::createString(512),
+ MySqlBinding::createBlob(512),
+ MySqlBinding::createTimestamp()
+ };
+
+ // Execute select statement. We expect one row to be returned. For this
+ // returned row the lambda provided as 4th argument should be executed.
+ ASSERT_NO_THROW_LOG(conn_.selectQuery(MySqlConnectionTest::GET_BY_INT_VALUE,
+ bindings, out_bindings,
+ [&](MySqlBindingCollection& out_bindings) {
+
+ // Compare received data with input data assuming they are both non-null.
+
+ if (!out_bindings[0]->amNull() && !in_bindings[0]->amNull()) {
+ EXPECT_EQ(static_cast<int>(in_bindings[0]->getInteger<uint8_t>()),
+ static_cast<int>(out_bindings[0]->getInteger<uint8_t>()));
+ }
+
+ if (!out_bindings[1]->amNull() && !in_bindings[1]->amNull()) {
+ EXPECT_EQ(in_bindings[1]->getInteger<uint32_t>(),
+ out_bindings[1]->getInteger<uint32_t>());
+ }
+
+ if (!out_bindings[2]->amNull() && !in_bindings[2]->amNull()) {
+ EXPECT_EQ(in_bindings[2]->getInteger<int64_t>(),
+ out_bindings[2]->getInteger<int64_t>());
+ }
+
+ if (!out_bindings[3]->amNull() && !in_bindings[3]->amNull()) {
+ EXPECT_EQ(in_bindings[3]->getString(),
+ out_bindings[3]->getString());
+ }
+
+ if (!out_bindings[4]->amNull() && !in_bindings[4]->amNull()) {
+ EXPECT_EQ(in_bindings[4]->getBlob(),
+ out_bindings[4]->getBlob());
+ }
+
+ if (!out_bindings[5]->amNull() && !in_bindings[5]->amNull()) {
+ EXPECT_TRUE(in_bindings[5]->getTimestamp() ==
+ out_bindings[5]->getTimestamp());
+ }
+ }));
+
+ // Make sure that null values were returned for columns for which null
+ // was set.
+ ASSERT_EQ(in_bindings.size(), out_bindings.size());
+ for (auto i = 0; i < in_bindings.size(); ++i) {
+ EXPECT_EQ(in_bindings[i]->amNull(), out_bindings[i]->amNull())
+ << "null value test failed for binding #" << i;
+ }
+ }
+
+ /// @brief Run a raw, unprepared statement and return the result.
+ ///
+ /// This is useful when running statements that can't be parameterized with a
+ /// question mark in place of a bound variable e.g. "SHOW GLOBAL VARIABLES"
+ /// and thus cannot be prepared beforehand. All the results are string, the
+ /// output should be the same as that which one would see in a mysql command
+ /// line client.
+ ///
+ /// @param statement the statement in string form
+ /// @throw DbOperationError if the statement could not be run
+ /// @return the list of rows, each row consisting of a list of values for
+ /// each column
+ std::vector<std::vector<std::string>>
+ rawStatement(std::string const& statement) const {
+ // Execute a SQL statement.
+ if (mysql_query(conn_.mysql_, statement.c_str())) {
+ isc_throw(DbOperationError,
+ statement << ": " << mysql_error(conn_.mysql_));
+ }
+
+ // Get a result set.
+ MySqlResult result(mysql_use_result(conn_.mysql_));
+
+ // Fetch a result set.
+ std::vector<std::vector<std::string>> output;
+ size_t r(0);
+ MYSQL_ROW row;
+ size_t const column_count(mysql_num_fields(result.result_));
+ while ((row = mysql_fetch_row(result.result_)) != NULL) {
+ output.push_back(std::vector<std::string>());
+ for (size_t i = 0; i < column_count; ++i) {
+ output[r].push_back(row[i]);
+ }
+ ++r;
+ }
+
+ return output;
+ }
+
+ /// @brief Get pxc_strict_mode global variable from the database.
+ /// For Percona, they can be: DISABLED, PERMISSIVE, ENFORCING, MASTER.
+ std::string showPxcStrictMode() {
+ // Store in a static variable so this only runs once per gtest binary
+ // invocation.
+ static std::string const pxc_strict_mode([&]() -> std::string {
+ // Execute select statement. We expect one row to be returned. For
+ // this returned row the lambda provided as 4th argument should be
+ // executed.
+ std::vector<std::vector<std::string>> const result(
+ rawStatement("SHOW GLOBAL VARIABLES LIKE 'pxc_strict_mode'"));
+ if (result.size() < 1 || result[0].size() < 2) {
+ // Not Percona
+ return "";
+ }
+
+ return result[0][1];
+ }());
+ return pxc_strict_mode;
+ }
+
+ /// *** Test definitions start here. Tests are invoked ***
+ /// *** multiple times further below in different test fixtures. ***
+
+ /// @brief Test that non-null values of various types can be inserted and
+ /// retrieved from the dataabse.
+ void select() {
+ std::string blob = "myblob";
+ MySqlBindingCollection in_bindings = {
+ MySqlBinding::createInteger<uint8_t>(123),
+ MySqlBinding::createInteger<uint32_t>(1024),
+ MySqlBinding::createInteger<int64_t>(-4096),
+ MySqlBinding::createString("shellfish"),
+ MySqlBinding::createBlob(blob.begin(), blob.end()),
+ /// @todo Change it to microsec_clock once we transition to
+ /// subsecond precision.
+ MySqlBinding::createTimestamp(
+ boost::posix_time::second_clock::local_time()),
+ };
+
+ testInsertSelect(in_bindings);
+ }
+
+ /// @brief Test that null value can be inserted to a column having numeric
+ /// type and retrieved.
+ void selectNullInteger() {
+ std::string blob = "myblob";
+ MySqlBindingCollection in_bindings = {
+ MySqlBinding::createInteger<uint8_t>(123),
+ MySqlBinding::createInteger<uint32_t>(1024),
+ MySqlBinding::createNull(),
+ MySqlBinding::createString("shellfish"),
+ MySqlBinding::createBlob(blob.begin(), blob.end()),
+ /// @todo Change it to microsec_clock once we transition to
+ /// subsecond precision.
+ MySqlBinding::createTimestamp(
+ boost::posix_time::second_clock::local_time()),
+ };
+
+ testInsertSelect(in_bindings);
+ }
+
+ /// @brief Test that null value can be inserted to a column having string
+ /// type and retrieved.
+ void selectNullString() {
+ std::string blob = "myblob";
+
+ MySqlBindingCollection in_bindings = {
+ MySqlBinding::createInteger<uint8_t>(123),
+ MySqlBinding::createInteger<uint32_t>(1024),
+ MySqlBinding::createInteger<int64_t>(-4096),
+ MySqlBinding::createNull(),
+ MySqlBinding::createBlob(blob.begin(), blob.end()),
+ /// @todo Change it to microsec_clock once we transition to
+ /// subsecond precision.
+ MySqlBinding::createTimestamp(
+ boost::posix_time::second_clock::local_time()),
+ };
+
+ testInsertSelect(in_bindings);
+ }
+
+ /// @brief Test that null value can be inserted to a column having blob type
+ /// and retrieved.
+ void selectNullBlob() {
+ MySqlBindingCollection in_bindings = {
+ MySqlBinding::createInteger<uint8_t>(123),
+ MySqlBinding::createInteger<uint32_t>(1024),
+ MySqlBinding::createInteger<int64_t>(-4096),
+ MySqlBinding::createString("shellfish"),
+ MySqlBinding::createNull(),
+ /// @todo Change it to microsec_clock once we transition to
+ /// subsecond precision.
+ MySqlBinding::createTimestamp(
+ boost::posix_time::second_clock::local_time()),
+ };
+
+ testInsertSelect(in_bindings);
+ }
+
+ /// @brief Test that null value can be inserted to a column having timestamp
+ /// type and retrieved.
+ void selectNullTimestamp() {
+ std::string blob = "myblob";
+ MySqlBindingCollection in_bindings = {
+ MySqlBinding::createInteger<uint8_t>(123),
+ MySqlBinding::createInteger<uint32_t>(1024),
+ MySqlBinding::createInteger<int64_t>(-4096),
+ MySqlBinding::createString("shellfish"),
+ MySqlBinding::createBlob(blob.begin(), blob.end()),
+ MySqlBinding::createNull(),
+ };
+
+ testInsertSelect(in_bindings);
+ }
+
+ /// @brief Test that empty string and empty blob can be inserted to a
+ /// database.
+ void selectEmptyStringBlob() {
+ std::string blob = "";
+ MySqlBindingCollection in_bindings = {
+ MySqlBinding::createInteger<uint8_t>(123),
+ MySqlBinding::createInteger<uint32_t>(1024),
+ MySqlBinding::createInteger<int64_t>(-4096),
+ MySqlBinding::createString(""),
+ MySqlBinding::createBlob(blob.begin(), blob.end()),
+ /// @todo Change it to microsec_clock once we transition to
+ /// subsecond precision.
+ MySqlBinding::createTimestamp(
+ boost::posix_time::second_clock::local_time()),
+ };
+
+ testInsertSelect(in_bindings);
+ }
+
+ /// @brief Test that a row can be deleted from the database.
+ void deleteByValue() {
+ // Insert a row with numeric values.
+ MySqlBindingCollection in_bindings = {
+ MySqlBinding::createInteger<uint8_t>(123),
+ MySqlBinding::createInteger<uint32_t>(1024),
+ MySqlBinding::createInteger<int64_t>(-4096),
+ MySqlBinding::createNull(),
+ MySqlBinding::createNull(),
+ MySqlBinding::createNull(),
+ };
+
+ ASSERT_NO_THROW_LOG(
+ conn_.insertQuery(MySqlConnectionTest::INSERT_VALUE, in_bindings));
+
+ // This variable will be checked to see if the row has been deleted
+ // from the database.
+ bool deleted = false;
+
+ // Execute delete query but use int_value of non existing row.
+ // The row should not be deleted.
+ in_bindings = {MySqlBinding::createInteger<uint32_t>(1)};
+ ASSERT_NO_THROW_LOG(
+ deleted = conn_.updateDeleteQuery(
+ MySqlConnectionTest::DELETE_BY_INT_VALUE, in_bindings));
+ ASSERT_FALSE(deleted);
+
+ // This time use the correct value.
+ in_bindings = {MySqlBinding::createInteger<uint32_t>(1024)};
+ ASSERT_NO_THROW_LOG(
+ deleted = conn_.updateDeleteQuery(
+ MySqlConnectionTest::DELETE_BY_INT_VALUE, in_bindings));
+ // The row should have been deleted.
+ ASSERT_TRUE(deleted);
+
+ // Let's confirm that it has been deleted by issuing a select query.
+ MySqlBindingCollection out_bindings = {
+ MySqlBinding::createInteger<uint8_t>(),
+ MySqlBinding::createInteger<uint32_t>(),
+ MySqlBinding::createInteger<int64_t>(),
+ MySqlBinding::createString(512),
+ MySqlBinding::createBlob(512),
+ MySqlBinding::createTimestamp(),
+ };
+
+ ASSERT_NO_THROW_LOG(conn_.selectQuery(MySqlConnectionTest::GET_BY_INT_VALUE,
+ in_bindings, out_bindings,
+ [&deleted](MySqlBindingCollection&) {
+ // This will be executed if the
+ // row is returned as a result of
+ // select query. We expect that
+ // this is not executed.
+ deleted = false;
+ }));
+ // Make sure that select query returned nothing.
+ EXPECT_TRUE(deleted);
+ }
+
+ /// @brief Test MySQL connection.
+ MySqlConnection conn_;
+};
+
+struct MySqlConnectionWithPrimaryKeyTest : MySqlConnectionTest {
+ MySqlConnectionWithPrimaryKeyTest()
+ : MySqlConnectionTest(/* primary_key = */ true) {
+ }
+};
+
+TEST_F(MySqlConnectionTest, select) {
+ if (showPxcStrictMode() == "ENFORCING" || showPxcStrictMode() == "MASTER") {
+ return;
+ }
+ select();
+}
+
+TEST_F(MySqlConnectionTest, selectNullInteger) {
+ if (showPxcStrictMode() == "ENFORCING" || showPxcStrictMode() == "MASTER") {
+ return;
+ }
+ selectNullInteger();
+}
+
+TEST_F(MySqlConnectionTest, selectNullString) {
+ if (showPxcStrictMode() == "ENFORCING" || showPxcStrictMode() == "MASTER") {
+ return;
+ }
+ selectNullString();
+}
+
+TEST_F(MySqlConnectionTest, selectNullBlob) {
+ if (showPxcStrictMode() == "ENFORCING" || showPxcStrictMode() == "MASTER") {
+ return;
+ }
+ selectNullBlob();
+}
+
+TEST_F(MySqlConnectionTest, selectNullTimestamp) {
+ if (showPxcStrictMode() == "ENFORCING" || showPxcStrictMode() == "MASTER") {
+ return;
+ }
+ selectNullTimestamp();
+}
+
+TEST_F(MySqlConnectionTest, selectEmptyStringBlob) {
+ if (showPxcStrictMode() == "ENFORCING" || showPxcStrictMode() == "MASTER") {
+ return;
+ }
+ selectEmptyStringBlob();
+}
+
+TEST_F(MySqlConnectionTest, deleteByValue) {
+ if (showPxcStrictMode() == "ENFORCING" || showPxcStrictMode() == "MASTER") {
+ return;
+ }
+ deleteByValue();
+}
+
+TEST_F(MySqlConnectionTest, transactions) {
+ // Two inserts within a transaction and successful commit.
+ conn_.startTransaction();
+ EXPECT_TRUE(conn_.isTransactionStarted());
+ runQuery("INSERT INTO mysql_connection_test (tinyint_value) VALUES (1)");
+ runQuery("INSERT INTO mysql_connection_test (tinyint_value) VALUES (2)");
+ conn_.commit();
+ EXPECT_FALSE(conn_.isTransactionStarted());
+ auto result = rawStatement("SELECT COUNT(*) FROM mysql_connection_test");
+ ASSERT_EQ(1, result.size());
+ ASSERT_EQ(1, result[0].size());
+ EXPECT_EQ("2", result[0][0]);
+
+ // Add third row but roll back the transaction. We should still have
+ // two rows in the table.
+ conn_.startTransaction();
+ EXPECT_TRUE(conn_.isTransactionStarted());
+ runQuery("INSERT INTO mysql_connection_test (tinyint_value) VALUES (5)");
+ conn_.rollback();
+ EXPECT_FALSE(conn_.isTransactionStarted());
+ ASSERT_EQ(1, result.size());
+ ASSERT_EQ(1, result[0].size());
+ EXPECT_EQ("2", result[0][0]);
+
+ // Nested transaction. The inner transaction should be ignored and the outer
+ // transaction rolled back. We should still have two rows in the database.
+ conn_.startTransaction();
+ EXPECT_TRUE(conn_.isTransactionStarted());
+ runQuery("INSERT INTO mysql_connection_test (tinyint_value) VALUES (3)");
+ conn_.startTransaction();
+ EXPECT_TRUE(conn_.isTransactionStarted());
+ runQuery("INSERT INTO mysql_connection_test (tinyint_value) VALUES (4)");
+ conn_.commit();
+ EXPECT_TRUE(conn_.isTransactionStarted());
+ conn_.rollback();
+ EXPECT_FALSE(conn_.isTransactionStarted());
+ result = rawStatement("SELECT COUNT(*) FROM mysql_connection_test");
+ ASSERT_EQ(1, result.size());
+ ASSERT_EQ(1, result[0].size());
+ EXPECT_EQ("2", result[0][0]);
+
+ // Nested transaction. The inner transaction is rolled back but this should
+ // be ignored because nested transactions are not supported. We should
+ // have two new rows.
+ conn_.startTransaction();
+ EXPECT_TRUE(conn_.isTransactionStarted());
+ runQuery("INSERT INTO mysql_connection_test (tinyint_value) VALUES (5)");
+ conn_.startTransaction();
+ EXPECT_TRUE(conn_.isTransactionStarted());
+ runQuery("INSERT INTO mysql_connection_test (tinyint_value) VALUES (6)");
+ conn_.rollback();
+ EXPECT_TRUE(conn_.isTransactionStarted());
+ conn_.commit();
+ EXPECT_FALSE(conn_.isTransactionStarted());
+ result = rawStatement("SELECT COUNT(*) FROM mysql_connection_test");
+ ASSERT_EQ(1, result.size());
+ ASSERT_EQ(1, result[0].size());
+ EXPECT_EQ("4", result[0][0]);
+
+ // Committing or rolling back a not started transaction is a coding error.
+ EXPECT_THROW(conn_.commit(), isc::Unexpected);
+ EXPECT_THROW(conn_.rollback(), isc::Unexpected);
+}
+
+TEST_F(MySqlConnectionWithPrimaryKeyTest, select) {
+ select();
+}
+
+TEST_F(MySqlConnectionWithPrimaryKeyTest, selectNullInteger) {
+ selectNullInteger();
+}
+
+TEST_F(MySqlConnectionWithPrimaryKeyTest, selectNullString) {
+ selectNullString();
+}
+
+TEST_F(MySqlConnectionWithPrimaryKeyTest, selectNullBlob) {
+ selectNullBlob();
+}
+
+TEST_F(MySqlConnectionWithPrimaryKeyTest, selectNullTimestamp) {
+ selectNullTimestamp();
+}
+
+TEST_F(MySqlConnectionWithPrimaryKeyTest, selectEmptyStringBlob) {
+ selectEmptyStringBlob();
+}
+
+TEST_F(MySqlConnectionWithPrimaryKeyTest, deleteByValue) {
+ deleteByValue();
+}
+
+/// @brief Test fixture class for @c MySqlConnection class methods.
+class MySqlSchemaTest : public ::testing::Test {
+public:
+ /// @brief Constructor.
+ MySqlSchemaTest() {
+ // Ensure we have the proper schema.
+ createMySQLSchema();
+ }
+
+ /// @brief Destructor.
+ virtual ~MySqlSchemaTest() {
+ destroyMySQLSchema();
+ }
+};
+
+/// @brief Check that getVersion() returns the expected version.
+TEST_F(MySqlSchemaTest, checkVersion) {
+ // Check version
+ auto parameters = DatabaseConnection::parse(validMySQLConnectionString());
+ std::pair<uint32_t, uint32_t> version;
+ ASSERT_NO_THROW_LOG(version = MySqlConnection::getVersion(parameters));
+ EXPECT_EQ(MYSQL_SCHEMA_VERSION_MAJOR, version.first);
+ EXPECT_EQ(MYSQL_SCHEMA_VERSION_MINOR, version.second);
+}
+
+/// @brief Test fixture class for secure connection.
+class MySqlSecureConnectionTest : public ::testing::Test {
+public:
+
+ /// @brief Check if SSL/TLS support is available and configured.
+ bool hasMySQLTls() {
+ std::string tls = getMySQLTlsEnv();
+ if (tls.empty()) {
+ tls = getMySQLTlsServer();
+ }
+ return (tls == "YES");
+ }
+};
+
+/// @brief Check that we can get the MySQL support status.
+TEST_F(MySqlSecureConnectionTest, getMySQLTls) {
+ std::string env;
+ try {
+ env = getMySQLTlsEnv();
+ std::cout << "getMySQLTlsEnv returns '" << env << "'\n";
+ } catch (const isc::Exception& ex) {
+ std::cerr << "getMySQLTlsEnv fails with " << ex.what() << "\n";
+ }
+ if (!env.empty()) {
+ return;
+ }
+ try {
+ std::cout << "getMySQLTlsServer returns '" << getMySQLTlsServer() << "'\n";
+ } catch (const isc::Exception& ex) {
+ std::cerr << "getMySQLTlsServer fails with " << ex.what() << "\n";
+ }
+}
+
+/// @brief Check the enforced TCP connection.
+TEST_F(MySqlSecureConnectionTest, Tcp) {
+ std::string conn_str = connectionString(MYSQL_VALID_TYPE, VALID_NAME,
+ VALID_HOST_TCP, VALID_USER,
+ VALID_PASSWORD);
+ MySqlConnection conn(DatabaseConnection::parse(conn_str));
+ ASSERT_NO_THROW_LOG(conn.openDatabase());
+}
+
+/// @brief Check the SSL/TLS protected connection.
+TEST_F(MySqlSecureConnectionTest, Tls) {
+ if (!hasMySQLTls()) {
+ std::cout << "SSL/TLS support is not available or configured: "
+ << "skipping this test\n";
+ return;
+ }
+ std::string conn_str = connectionString(MYSQL_VALID_TYPE, VALID_NAME,
+ VALID_HOST_TCP, VALID_SECURE_USER,
+ VALID_PASSWORD, 0, 0,
+ VALID_CERT, VALID_KEY, VALID_CA,
+ VALID_CIPHER);
+ MySqlConnection conn(DatabaseConnection::parse(conn_str));
+ ASSERT_NO_THROW_LOG(conn.openDatabase());
+ EXPECT_TRUE(conn.getTls());
+ std::string cipher = conn.getTlsCipher();
+ EXPECT_FALSE(cipher.empty());
+ std::cout << "TLS cipher is '" << cipher << "'\n";
+}
+
+/// @brief Check the SSL/TLS protected connection still requires the password.
+TEST_F(MySqlSecureConnectionTest, TlsInvalidPassword) {
+ if (!hasMySQLTls()) {
+ std::cout << "SSL/TLS support is not available or configured: "
+ << "skipping this test\n";
+ return;
+ }
+ std::string conn_str = connectionString(MYSQL_VALID_TYPE, VALID_NAME,
+ VALID_HOST_TCP, VALID_SECURE_USER,
+ INVALID_PASSWORD, 0, 0,
+ VALID_CERT, VALID_KEY, VALID_CA,
+ VALID_CIPHER);
+ MySqlConnection conn(DatabaseConnection::parse(conn_str));
+ EXPECT_THROW(conn.openDatabase(), DbOpenError);
+}
+
+/// @brief Check the SSL/TLS protected connection requires crypto parameters.
+TEST_F(MySqlSecureConnectionTest, TlsNoCrypto) {
+ if (!hasMySQLTls()) {
+ std::cout << "SSL/TLS support is not available or configured: "
+ << "skipping this test\n";
+ return;
+ }
+ std::string conn_str = connectionString(MYSQL_VALID_TYPE, VALID_NAME,
+ VALID_HOST_TCP, VALID_SECURE_USER,
+ VALID_PASSWORD);
+ MySqlConnection conn(DatabaseConnection::parse(conn_str));
+ EXPECT_THROW(conn.openDatabase(), DbOpenError);
+}
+
+/// @brief Check the SSL/TLS protected connection requires valid key.
+TEST_F(MySqlSecureConnectionTest, TlsInvalidKey) {
+ if (!hasMySQLTls()) {
+ std::cout << "SSL/TLS support is not available or configured: "
+ << "skipping this test\n";
+ return;
+ }
+ std::string conn_str = connectionString(MYSQL_VALID_TYPE, VALID_NAME,
+ VALID_HOST_TCP, VALID_SECURE_USER,
+ VALID_PASSWORD, 0, 0,
+ VALID_CERT, INVALID_KEY, VALID_CA,
+ VALID_CIPHER);
+ MySqlConnection conn(DatabaseConnection::parse(conn_str));
+ EXPECT_THROW(conn.openDatabase(), DbOpenError);
+}
+
+/// @brief Check the SSL/TLS protected connection requires a key.
+TEST_F(MySqlSecureConnectionTest, TlsNoKey) {
+ if (!hasMySQLTls()) {
+ std::cout << "SSL/TLS support is not available or configured: "
+ << "skipping this test\n";
+ return;
+ }
+ std::string conn_str = connectionString(MYSQL_VALID_TYPE, VALID_NAME,
+ VALID_HOST_TCP, VALID_SECURE_USER,
+ VALID_PASSWORD, 0, 0,
+ VALID_CERT, 0, VALID_CA,
+ VALID_CIPHER);
+ MySqlConnection conn(DatabaseConnection::parse(conn_str));
+ EXPECT_THROW(conn.openDatabase(), DbOpenError);
+}
+
+} // namespace
diff --git a/src/lib/mysql/tests/run_unittests.cc b/src/lib/mysql/tests/run_unittests.cc
new file mode 100644
index 0000000..4e83d4b
--- /dev/null
+++ b/src/lib/mysql/tests/run_unittests.cc
@@ -0,0 +1,20 @@
+// Copyright (C) 2018 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 <log/logger_support.h>
+#include <gtest/gtest.h>
+
+int
+main(int argc, char* argv[]) {
+ ::testing::InitGoogleTest(&argc, argv);
+ isc::log::initLogger();
+
+ int result = RUN_ALL_TESTS();
+
+ return (result);
+}
diff --git a/src/lib/mysql/testutils/Makefile.am b/src/lib/mysql/testutils/Makefile.am
new file mode 100644
index 0000000..64680e6
--- /dev/null
+++ b/src/lib/mysql/testutils/Makefile.am
@@ -0,0 +1,23 @@
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+
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+AM_CPPFLAGS += $(BOOST_INCLUDES)
+
+AM_CXXFLAGS = $(KEA_CXXFLAGS)
+
+CLEANFILES = *.gcno *.gcda
+
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+
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+
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+
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+
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+
+endif
diff --git a/src/lib/mysql/testutils/Makefile.in b/src/lib/mysql/testutils/Makefile.in
new file mode 100644
index 0000000..a2ded3d
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diff --git a/src/lib/mysql/testutils/mysql_schema.cc b/src/lib/mysql/testutils/mysql_schema.cc
new file mode 100644
index 0000000..936beb7
--- /dev/null
+++ b/src/lib/mysql/testutils/mysql_schema.cc
@@ -0,0 +1,163 @@
+// Copyright (C) 2015-2022 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 <string>
+#include <mysql.h>
+#include <mysql/testutils/mysql_schema.h>
+#include <mysql/mysql_connection.h>
+#include <exceptions/exceptions.h>
+
+#include <fstream>
+#include <iostream>
+#include <sstream>
+#include <stdlib.h>
+
+using namespace std;
+
+namespace isc {
+namespace db {
+namespace test {
+
+const char* MYSQL_VALID_TYPE = "type=mysql";
+
+string
+validMySQLConnectionString() {
+ return (connectionString(MYSQL_VALID_TYPE, VALID_NAME, VALID_HOST,
+ VALID_USER, VALID_PASSWORD));
+}
+
+void destroyMySQLSchema(bool show_err, bool force) {
+ // If force is true or wipeMySQLData() fails, destroy the schema.
+ if (force || (!softWipeEnabled()) || wipeMySQLData(show_err)) {
+ runMySQLScript(DATABASE_SCRIPTS_DIR, "mysql/dhcpdb_drop.mysql", show_err);
+ }
+}
+
+void createMySQLSchema(bool show_err, bool force) {
+ // If force is true or wipeMySQLData() fails, recreate the schema.
+ if (force || (!softWipeEnabled()) || wipeMySQLData(show_err)) {
+ destroyMySQLSchema(show_err, true);
+ runMySQLScript(DATABASE_SCRIPTS_DIR, "mysql/dhcpdb_create.mysql", show_err);
+ }
+}
+
+bool wipeMySQLData(bool show_err) {
+ std::ostringstream cmd;
+ cmd << "sh " << DATABASE_SCRIPTS_DIR << "/";
+
+ std::ostringstream version;
+ version << MYSQL_SCHEMA_VERSION_MAJOR << "." << MYSQL_SCHEMA_VERSION_MINOR;
+
+ cmd << "mysql/wipe_data.sh " << version.str()
+ << " -N -B --user=keatest --password=keatest keatest";
+ if (!show_err) {
+ cmd << " 2>/dev/null ";
+ }
+
+ int retval = ::system(cmd.str().c_str());
+ if (retval) {
+ std::cerr << "wipeMySQLData failed:[" << cmd.str() << "]" << std::endl;
+ }
+
+ return(retval);
+}
+
+void runMySQLScript(const std::string& path, const std::string& script_name,
+ bool show_err) {
+ std::ostringstream cmd;
+ cmd << "mysql -N -B --user=keatest --password=keatest keatest";
+ if (!show_err) {
+ cmd << " 2>/dev/null ";
+ }
+
+ if (!path.empty()) {
+ cmd << " < " << path << "/";
+ }
+
+ cmd << script_name;
+
+ int retval = ::system(cmd.str().c_str());
+ if (retval) {
+ std::cerr << "runMySQLSchema failed: " << cmd.str() << std::endl;
+ isc_throw(Unexpected, "runMySQLSchema failed: " << cmd.str());
+ }
+}
+
+string getMySQLTlsEnv() {
+ const string name("KEA_MYSQL_HAVE_SSL");
+ const char* val = getenv(name.c_str());
+ return (val ? string(val) : "");
+}
+
+string getMySQLTlsServerVariable(string variable) {
+ MYSQL_RES* result(0);
+ try {
+ DatabaseConnection::ParameterMap parameters =
+ DatabaseConnection::parse(validMySQLConnectionString());
+ MySqlConnection conn(parameters);
+ conn.openDatabase();
+ string sql("SHOW GLOBAL VARIABLES LIKE '");
+ sql += variable;
+ sql += "'";
+ if (mysql_query(conn.mysql_, sql.c_str())) {
+ isc_throw(DbOperationError,
+ sql << ": " << mysql_error(conn.mysql_));
+ }
+ result = mysql_use_result(conn.mysql_);
+ size_t count = mysql_num_fields(result);
+ if (count != 2) {
+ isc_throw(DbOperationError,
+ sql << " returned " << count << " rows, expecting 2");
+ }
+ MYSQL_ROW row = mysql_fetch_row(result);
+ if (!row) {
+ isc_throw(DbOperationError, sql << " returned row is null");
+ }
+ // first column is 'have_ssl', second is the status.
+ string name(row[0]);
+ if (name != variable) {
+ isc_throw(DbOperationError,
+ sql << " returned a wrong name '" << name
+ << "', expected '" << variable << "'");
+ }
+ string value(row[1]);
+ mysql_free_result(result);
+ return (value);
+ } catch (...) {
+ if (result) {
+ mysql_free_result(result);
+ }
+ throw;
+ }
+}
+
+bool isMySQLTlsConfigured() {
+ if (getMySQLTlsServerVariable("ssl_ca").find("kea-ca.crt") == string::npos) {
+ return (false);
+ }
+ if (getMySQLTlsServerVariable("ssl_cert").find("kea-server.crt") == string::npos) {
+ return (false);
+ }
+ if (getMySQLTlsServerVariable("ssl_key").find("kea-server.key") == string::npos) {
+ return (false);
+ }
+ return (true);
+}
+
+string getMySQLTlsServer() {
+ string value = getMySQLTlsServerVariable("have_ssl");
+ if (value == "YES" && !isMySQLTlsConfigured()) {
+ value = "UNCONFIGURED";
+ }
+ const string env("KEA_MYSQL_HAVE_SSL");
+ static_cast<void>(setenv(env.c_str(), value.c_str(), 1));
+ return (value);
+}
+
+} // namespace test
+} // namespace db
+} // namespace isc
diff --git a/src/lib/mysql/testutils/mysql_schema.h b/src/lib/mysql/testutils/mysql_schema.h
new file mode 100644
index 0000000..a3df21f
--- /dev/null
+++ b/src/lib/mysql/testutils/mysql_schema.h
@@ -0,0 +1,123 @@
+// Copyright (C) 2015-2022 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/.
+
+#ifndef TEST_MYSQL_SCHEMA_H
+#define TEST_MYSQL_SCHEMA_H
+
+#include <config.h>
+#include <database/testutils/schema.h>
+#include <string>
+
+namespace isc {
+namespace db {
+namespace test {
+
+extern const char* MYSQL_VALID_TYPE;
+
+/// Return valid connection string
+///
+/// @return valid MySQL connection string.
+std::string validMySQLConnectionString();
+
+/// @brief Clear the unit test database
+///
+/// In order to reduce test execution time, this function
+/// defaults to first attempting to delete transient data
+/// from the database by calling @c wipeMySQLData. If that
+/// function fails it will then attempt to destroy the database
+/// schema by running the SQL script:
+///
+/// <TEST_ADMIN_SCRIPTS_DIR>/mysql/dhcpdb_drop.mysql
+///
+/// The default behavior of wiping the data only may be overridden
+/// in one of two ways:
+///
+/// -# Setting the force parameter to true
+/// -# Defining the environment variable:
+/// KEA_TEST_DB_WIPE_DATA_ONLY="false"
+///
+/// @param show_err flag which governs whether or not stderr is suppressed.
+/// @param force if true, the function will skip deleting the data and
+/// destroy the schema.
+void destroyMySQLSchema(bool show_err = false, bool force = false);
+
+/// @brief Create the unit test MySQL Schema
+///
+/// Ensures the unit test database is a empty and version-correct.
+/// Unless, the force parameter is true, it will first attempt
+/// to wipe the data from the database by calling @c wipeMySQLData.
+/// If this call succeeds the function returns, otherwise it will
+/// will call @c destroyMySQLSchema to forcibly remove the
+/// existing schema and then submits the SQL script:
+///
+/// <TEST_ADMIN_SCRIPTS_DIR>/mysql/dhcpdb_create.mysql
+///
+/// to the unit test MySQL database.
+///
+/// The default behavior of wiping the data only may be overridden
+/// in one of two ways:
+///
+/// -# Setting the force parameter to true
+/// -# Defining the environment variable:
+/// KEA_TEST_DB_WIPE_DATA_ONLY="false"
+///
+/// @param show_err flag which governs whether or not stderr is suppressed.
+/// @param force flag when true, the function will recreate the database
+/// schema.
+void createMySQLSchema(bool show_err = false, bool force = false);
+
+/// @brief Attempts to wipe data from the MySQL unit test database
+///
+/// Runs the shell script
+///
+/// <TEST_ADMIN_SCRIPTS_DIR>/mysql/wipe_data.sh
+///
+/// This will fail if there is no schema, if the existing schema
+/// version is incorrect (i.e. does not match MYSQL_SCHEMA_VERSION_MAJOR
+/// and MYSQL_SCHEMA_VERSION_MINOR), or a SQL error occurs. Otherwise,
+/// the script is should delete all transient data, leaving intact
+/// reference tables.
+///
+/// @param show_err flag which governs whether or not stderr is suppressed.
+bool wipeMySQLData(bool show_err = false);
+
+/// @brief Run a MySQL SQL script against the MySQL unit test database
+///
+/// Submits the given SQL script to MySQL via mysql CLI. The output of
+/// stderr is suppressed unless the parameter, show_err is true. The is done
+/// to suppress warnings that might otherwise make test output needlessly
+/// noisy. An exception is thrown if the script fails to execute.
+///
+/// @param path - path (if not blank) of the script to execute
+/// @param script_name - file name of the path to execute
+/// @param show_err flag which governs whether or not stderr is suppressed.
+/// @throw Unexpected when the script returns an error.
+void runMySQLScript(const std::string& path, const std::string& script_name,
+ bool show_err);
+
+/// @brief Get the SSL/TLS support status from the environment
+///
+/// The environment variable is KEA_MYSQL_HAVE_SSL
+std::string getMySQLTlsEnv();
+
+/// @brief Get the SSL/TLS support status from the server
+/// @note the returned value is set in the environment
+std::string getMySQLTlsServer();
+
+/// @brief Return true if the server has been configured with proper SSL/TLS
+/// credentials, false otherwise
+bool isMySQLTlsConfigured();
+
+/// @brief Get the server global variable value
+///
+/// @param variable The server global variable name
+std::string getMySQLTlsServerVariable(std::string variable);
+
+}
+}
+}
+
+#endif
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