PBS-28 feature: Merge code from the MySQL Protocol Prototype onto the main source tree

.clang-format-ignore

@@ -0,0 +1 @@
+extra/mysql_protocol/mysqlrouter/*

.clang-tidy

@@ -13,4 +13,5 @@ Checks: "
   -llvm-header-guard
 "
 WarningsAsErrors: '*'
-HeaderFilterRegex: ''
+HeaderFilterRegex: '.*'
+ExcludeHeaderFilterRegex: 'mysqlrouter/.*'

.github/workflows/cmake.yml

@@ -263,10 +263,14 @@ jobs:
       if: matrix.config.run_clang_tidy
       run: clang-tidy-20 --version
 
+    - name: Dump Clang Tidy Config
+      if: matrix.config.run_clang_tidy
+      run: clang-tidy-20 --dump-config --config-file=${{github.workspace}}/src/.clang-tidy
+
     - name: Clang Tidy
       if: matrix.config.run_clang_tidy
       # Run Clang Tidy
-      run: run-clang-tidy-20 -header-filter=.* -j=${{steps.cpu-cores.outputs.count}} -use-color -p=${{github.workspace}}/src-build-${{matrix.config.label}}
+      run: run-clang-tidy-20 -config-file=${{github.workspace}}/src/.clang-tidy -j=${{steps.cpu-cores.outputs.count}} -use-color -p=${{github.workspace}}/src-build-${{matrix.config.label}}
 
     - name: Application version
       working-directory: ${{github.workspace}}/src-build-${{matrix.config.label}}

CMakeLists.txt

@@ -72,7 +72,7 @@ if(WITH_ASAN)
   target_link_options(binlog_server_compiler_flags INTERFACE "-fsanitize=address")
 endif()
 
-find_package(Boost 1.90.0 EXACT REQUIRED COMPONENTS url json)
+find_package(Boost 1.90.0 EXACT REQUIRED COMPONENTS url json asio)
 
 find_package(MySQL REQUIRED)
 
@@ -536,6 +536,74 @@ set_target_properties(binlog_server PROPERTIES
   CXX_STANDARD_REQUIRED YES
   CXX_EXTENSIONS NO
 )
+set(mysql_harness_source_files
+  extra/mysql_protocol/mysql/harness/net_ts/buffer.h
+
+  extra/mysql_protocol/mysql/harness/stdx/bit.h
+  extra/mysql_protocol/mysql/harness/stdx/expected.h
+  extra/mysql_protocol/mysql/harness/stdx/flags.h
+  extra/mysql_protocol/mysql/harness/stdx/ranges.h
+  extra/mysql_protocol/mysql/harness/stdx/type_traits.h
+)
+
+set(mysql_protocol_source_files
+  extra/mysql_protocol/mysqlrouter/classic_protocol.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_binary.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_clone.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_codec.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_codec_base.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_codec_binary.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_codec_clone.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_codec_error.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_codec_frame.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_codec_message.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_codec_session_track.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_codec_wire.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_constants.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_frame.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_message.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_session_track.h
+  extra/mysql_protocol/mysqlrouter/classic_protocol_wire.h)
+
+set(minimysql_source_files
+  src/minimysql/caching_sha2_password_authenticator.hpp
+  src/minimysql/caching_sha2_password_authenticator.cpp
+  src/minimysql/connection_context_fwd.hpp
+  src/minimysql/connection_context.hpp
+  src/minimysql/connection_context.cpp
+
+  src/minimysql_app.cpp
+)
+
+add_executable(minimysql_server ${minimysql_source_files} ${mysql_protocol_source_files} ${mysql_harness_source_files})
+
+# GCC 14 may report a false-positive mismatched allocation/deallocation
+# warning in boost::asio coroutine machinery (awaitable_frame) used in
+# minimysql_app.cpp.
+# Also, there are some false-positive null-dereference warnings in boost::asio
+# io_context.
+# Keep -Werror globally and suppress only this source file.
+set_source_files_properties(src/minimysql_app.cpp PROPERTIES
+  COMPILE_OPTIONS
+    "$<$<AND:$<COMPILE_LANG_AND_ID:CXX,GNU>,$<VERSION_GREATER_EQUAL:$<CXX_COMPILER_VERSION>,14>>:-Wno-error=mismatched-new-delete;-Wno-error=null-dereference>"
+)
+
+target_compile_definitions(minimysql_server PRIVATE BOOST_ASIO_NO_DEPRECATED)
+target_link_libraries(minimysql_server
+  PRIVATE
+    binlog_server_compiler_flags
+    Boost::headers Boost::asio
+    OpenSSL::Crypto
+)
+
+target_include_directories(minimysql_server PRIVATE "${PROJECT_SOURCE_DIR}/extra/mysql_protocol")
+
+# it is not possible to propagate CXX_EXTENSIONS and CXX_STANDARD_REQUIRED
+# via interface library (binlog_server_compiler_flags)
+set_target_properties(minimysql_server PROPERTIES
+  CXX_STANDARD_REQUIRED YES
+  CXX_EXTENSIONS NO
+)
 
 include(CTest)
 if(BUILD_TESTING)

extra/mysql_protocol/mysql/harness/net_ts/buffer.h

@@ -0,0 +1,40 @@
+/*
+  Copyright (c) 2019, 2026, Oracle and/or its affiliates.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License, version 2.0,
+  as published by the Free Software Foundation.
+
+  This program is designed to work with certain software (including
+  but not limited to OpenSSL) that is licensed under separate terms,
+  as designated in a particular file or component or in included license
+  documentation.  The authors of MySQL hereby grant you an additional
+  permission to link the program and your derivative works with the
+  separately licensed software that they have either included with
+  the program or referenced in the documentation.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef MYSQL_HARNESS_NET_TS_BUFFER_H
+#define MYSQL_HARNESS_NET_TS_BUFFER_H
+
+#include <boost/asio/buffer.hpp>
+
+namespace net {
+
+using boost::asio::buffer;
+using boost::asio::buffer_size;
+using boost::asio::const_buffer;
+using boost::asio::mutable_buffer;
+
+} // namespace net
+
+#endif // MYSQL_HARNESS_NET_TS_BUFFER_H

extra/mysql_protocol/mysql/harness/stdx/bit.h

@@ -0,0 +1,37 @@
+/*
+  Copyright (c) 2019, 2026, Oracle and/or its affiliates.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License, version 2.0,
+  as published by the Free Software Foundation.
+
+  This program is designed to work with certain software (including
+  but not limited to OpenSSL) that is licensed under separate terms,
+  as designated in a particular file or component or in included license
+  documentation.  The authors of MySQL hereby grant you an additional
+  permission to link the program and your derivative works with the
+  separately licensed software that they have either included with
+  the program or referenced in the documentation.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef MYSQL_HARNESS_STDX_BIT_H
+#define MYSQL_HARNESS_STDX_BIT_H
+
+#include <bit>
+
+namespace stdx {
+
+using std::byteswap;
+
+} // namespace stdx
+
+#endif // MYSQL_HARNESS_STDX_BIT_H

extra/mysql_protocol/mysql/harness/stdx/expected.h

@@ -0,0 +1,38 @@
+/*
+  Copyright (c) 2019, 2026, Oracle and/or its affiliates.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License, version 2.0,
+  as published by the Free Software Foundation.
+
+  This program is designed to work with certain software (including
+  but not limited to OpenSSL) that is licensed under separate terms,
+  as designated in a particular file or component or in included license
+  documentation.  The authors of MySQL hereby grant you an additional
+  permission to link the program and your derivative works with the
+  separately licensed software that they have either included with
+  the program or referenced in the documentation.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef MYSQL_HARNESS_STDX_EXPECTED_H
+#define MYSQL_HARNESS_STDX_EXPECTED_H
+
+#include <expected>
+
+namespace stdx {
+
+using std::expected;
+using std::unexpected;
+
+} // namespace stdx
+
+#endif // MYSQL_HARNESS_STDX_EXPECTED_H