[#3242] Added bare-bones perfmon hook library

New files:
    arm/hooks-perfmon.rst
	src/hooks/dhcp/perfmon/.gitattributes
	src/hooks/dhcp/perfmon/.gitignore
	src/hooks/dhcp/perfmon/Makefile.am
	src/hooks/dhcp/perfmon/libloadtests/.gitignore
	src/hooks/dhcp/perfmon/libloadtests/Makefile.am
	src/hooks/dhcp/perfmon/libloadtests/load_unload_unittests.cc
	src/hooks/dhcp/perfmon/libloadtests/run_unittests.cc
	src/hooks/dhcp/perfmon/perfmon.dox
	src/hooks/dhcp/perfmon/perfmon_callouts.cc
	src/hooks/dhcp/perfmon/perfmon_log.cc
	src/hooks/dhcp/perfmon/perfmon_log.h
	src/hooks/dhcp/perfmon/perfmon_messages.cc
	src/hooks/dhcp/perfmon/perfmon_messages.h
	src/hooks/dhcp/perfmon/perfmon_messages.mes
	src/hooks/dhcp/perfmon/tests/.gitignore
	src/hooks/dhcp/perfmon/tests/Makefile.am
	src/hooks/dhcp/perfmon/tests/run_unittests.cc
	src/hooks/dhcp/perfmon/version.cc

Modified:
	configure.ac
	arm/hooks-perfmon.rst
	arm/hooks.rst
	arm/logging.rst
	arm/rst_arm_sources.mk
	conf.py
	src/hooks/dhcp/Makefile.am

configure.ac

@@ -1581,6 +1581,9 @@ AC_CONFIG_FILES([src/hooks/dhcp/stat_cmds/tests/Makefile])
 AC_CONFIG_FILES([src/hooks/dhcp/user_chk/Makefile])
 AC_CONFIG_FILES([src/hooks/dhcp/user_chk/tests/Makefile])
 AC_CONFIG_FILES([src/hooks/dhcp/user_chk/tests/test_data_files_config.h])
+AC_CONFIG_FILES([src/hooks/dhcp/perfmon/Makefile])
+AC_CONFIG_FILES([src/hooks/dhcp/perfmon/libloadtests/Makefile])
+AC_CONFIG_FILES([src/hooks/dhcp/perfmon/tests/Makefile])
 AC_CONFIG_FILES([src/lib/Makefile])
 AC_CONFIG_FILES([src/lib/asiodns/Makefile])
 AC_CONFIG_FILES([src/lib/asiodns/tests/Makefile])

doc/sphinx/arm/hooks-perfmon.rst

@@ -0,0 +1,39 @@
+.. ischooklib:: libdhcp_perfmon.so
+.. _hooks-perfmon:
+
+``libdhcp_perfmon.so``: PerfMon
+===============================
+
+This hook library can be loaded by either kea-dhcp4 or kea-dhcp6 servers
+to extend them with the ability to track and report performance related data.
+
+.. note::
+
+    This library is currently under development and not yet functional.
+
+Overview
+~~~~~~~~
+
+The library, added in Kea 2.5.6, can be loaded by the :iscman:`kea-dhcp4` or
+:iscman:`kea-dhcp6` daemon by adding it to the ``hooks-libraries`` element of
+the server's configuration:
+
+.. code-block:: javascript
+
+    {
+        "hooks-libraries": [
+            {
+                "library": "/usr/local/lib/libdhcp_perfmon.so",
+                "parameters": {
+                    ...
+                }
+            },
+            ...
+        ],
+        ...
+    }
+
+Configuration
+~~~~~~~~~~~~~
+
+    TBD

doc/sphinx/arm/hooks.rst

@@ -527,6 +527,10 @@ loaded by the correct process per the table below.
    |                                                           |              | a repository for the Kea configuration information. Kea      |
    |                                                           |              | servers use this library to fetch their configurations.      |
    +-----------------------------------------------------------+--------------+--------------------------------------------------------------+
+   | :ref:`PerfMon <hooks-perfmon>`                            | Kea open     | With this hook library, :iscman:`kea-dhcp4` server and       |
+   |                                                           | source       | :iscman:`kea-dhcp6` servers can track and report performance |
+   |                                                           |              | data. CURRENTLY UNDER DEVELOPMENT                            |
+   +-----------------------------------------------------------+--------------+--------------------------------------------------------------+
    | :ref:`Ping Check <hooks-ping-check>`                      | ISC support  | With this hook library, :iscman:`kea-dhcp4` server can       |
    |                                                           | customers    | perform ping checks of candidate lease addresses before      |
    |                                                           |              | offering them to clients.                                    |
@@ -611,6 +615,7 @@ sections.
 .. include:: hooks-legal-log.rst
 .. include:: hooks-limits.rst
 .. include:: hooks-cb-mysql.rst
+.. include:: hooks-perfmon.rst
 .. include:: hooks-ping-check.rst
 .. include:: hooks-cb-pgsql.rst
 .. include:: hooks-radius.rst

doc/sphinx/arm/logging.rst

@@ -427,6 +427,10 @@ libraries), or hook libraries (open source or premium).
    |                                  |                                       | message carried in             |
    |                                  |                                       | the packet is parsed.          |
    +----------------------------------+---------------------------------------+--------------------------------+
+   | ``kea-dhcp4.perfmon-hooks``      | :ischooklib:`libdhcp_perfmon.so`      | Used                           |
+   | ``kea-dhcp6.perfmon-hooks``      | open-source hook library              | to log messages related to     |
+   |                                  |                                       | performan monitoring.          |
+   +----------------------------------+---------------------------------------+--------------------------------+
    | ``kea-dhcp4.ping-check-hooks``   | :ischooklib:`libdhcp_ping_check.so`   | Used                           |
    |                                  | subscription hook library             | to log messages related to     |
    |                                  |                                       | carrying out pre-offer ping    |

doc/sphinx/arm/rst_arm_sources.mk

@@ -31,6 +31,7 @@ rst_arm_sources += arm/hooks-limits.rst
 rst_arm_sources += arm/hooks-cb-mysql.rst
 rst_arm_sources += arm/hooks-cb-pgsql.rst
 rst_arm_sources += arm/hooks-legal-log.rst
+rst_arm_sources += arm/hooks-perfmon.rst
 rst_arm_sources += arm/hooks-ping-check.rst
 rst_arm_sources += arm/hooks-radius.rst
 rst_arm_sources += arm/hooks-rbac.rst

doc/sphinx/conf.py

@@ -96,6 +96,7 @@ exclude_patterns = [
     'arm/hooks-lease-cmds.rst',
     'arm/hooks-lease-query.rst',
     'arm/hooks-limits.rst',
+    'arm/hooks-perfmon.rst',
     'arm/hooks-ping-check.rst',
     'arm/hooks-radius.rst',
     'arm/hooks-rbac.rst',

src/hooks/dhcp/Makefile.am

@@ -1,4 +1,4 @@
-SUBDIRS = bootp flex_option high_availability lease_cmds
+SUBDIRS = bootp flex_option high_availability lease_cmds perfmon
 
 if HAVE_MYSQL
 SUBDIRS += mysql_cb

src/hooks/dhcp/perfmon/.gitattributes

@@ -0,0 +1,2 @@
+/perfmon_messages.cc           -diff merge=ours
+/perfmon_messages.h            -diff merge=ours

src/hooks/dhcp/perfmon/.gitignore

@@ -0,0 +1 @@
+/html

src/hooks/dhcp/perfmon/Makefile.am

@@ -0,0 +1,86 @@
+SUBDIRS = . tests libloadtests
+
+AM_CPPFLAGS  = -I$(top_builddir)/src/lib -I$(top_srcdir)/src/lib
+AM_CPPFLAGS += $(BOOST_INCLUDES)
+AM_CXXFLAGS  = $(KEA_CXXFLAGS)
+
+# Ensure that the message file and doxygen file is included in the distribution
+EXTRA_DIST = perfmon_messages.mes
+EXTRA_DIST += perfmon.dox
+
+CLEANFILES = *.gcno *.gcda
+
+# convenience archive
+
+noinst_LTLIBRARIES = libperfmon.la
+
+libperfmon_la_SOURCES = perfmon_callouts.cc
+libperfmon_la_SOURCES += perfmon_log.cc perfmon_log.h
+libperfmon_la_SOURCES += perfmon_messages.cc perfmon_messages.h
+libperfmon_la_SOURCES += version.cc
+
+libperfmon_la_CXXFLAGS = $(AM_CXXFLAGS)
+libperfmon_la_CPPFLAGS = $(AM_CPPFLAGS)
+
+# install the shared object into $(libdir)/kea/hooks
+lib_hooksdir = $(libdir)/kea/hooks
+lib_hooks_LTLIBRARIES = libdhcp_perfmon.la
+
+libdhcp_perfmon_la_SOURCES =
+libdhcp_perfmon_la_LDFLAGS  = $(AM_LDFLAGS)
+libdhcp_perfmon_la_LDFLAGS += -avoid-version -export-dynamic -module
+libdhcp_perfmon_la_LIBADD  = libperfmon.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/dhcpsrv/libkea-dhcpsrv.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/process/libkea-process.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/eval/libkea-eval.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/dhcp_ddns/libkea-dhcp_ddns.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/stats/libkea-stats.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/config/libkea-cfgclient.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/http/libkea-http.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/dhcp/libkea-dhcp++.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/hooks/libkea-hooks.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/database/libkea-database.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/cc/libkea-cc.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/dns/libkea-dns++.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/cryptolink/libkea-cryptolink.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/log/libkea-log.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/util/libkea-util.la
+libdhcp_perfmon_la_LIBADD += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
+libdhcp_perfmon_la_LIBADD += $(LOG4CPLUS_LIBS)
+libdhcp_perfmon_la_LIBADD += $(CRYPTO_LIBS)
+libdhcp_perfmon_la_LIBADD += $(BOOST_LIBS)
+
+# If we want to get rid of all generated messages files, we need to use
+# make maintainer-clean. The proper way to introduce custom commands for
+# that operation is to define maintainer-clean-local target. However,
+# make maintainer-clean also removes Makefile, so running configure script
+# is required.  To make it easy to rebuild messages without going through
+# reconfigure, a new target messages-clean has been added.
+maintainer-clean-local:
+	rm -f perfmon_messages.h perfmon_messages.cc
+
+# To regenerate messages files, one can do:
+#
+# make messages-clean
+# make messages
+#
+# This is needed only when a .mes file is modified.
+messages-clean: maintainer-clean-local
+
+if GENERATE_MESSAGES
+
+# Define rule to build logging source files from message file
+messages: perfmon_messages.h perfmon_messages.cc
+	@echo Message files regenerated
+
+perfmon_messages.h perfmon_messages.cc: perfmon_messages.mes
+	$(top_builddir)/src/lib/log/compiler/kea-msg-compiler $(top_srcdir)/src/hooks/dhcp/perfmon/perfmon_messages.mes
+
+else
+
+messages perfmon_messages.h perfmon_messages.cc:
+	@echo Messages generation disabled. Configure with --enable-generate-messages to enable it.
+
+endif
+

src/hooks/dhcp/perfmon/libloadtests/.gitignore

@@ -0,0 +1 @@
+hook_load_unittests

src/hooks/dhcp/perfmon/libloadtests/Makefile.am

@@ -0,0 +1,55 @@
+SUBDIRS = .
+
+AM_CPPFLAGS  = -I$(top_builddir)/src/lib -I$(top_srcdir)/src/lib
+AM_CPPFLAGS += -I$(top_builddir)/src/hooks/dhcp/perfmon -I$(top_srcdir)/src/hooks/dhcp/perfmon
+AM_CPPFLAGS += $(BOOST_INCLUDES)
+AM_CPPFLAGS += -DLIBDHCP_PERFMON_SO=\"$(abs_top_builddir)/src/hooks/dhcp/perfmon/.libs/libdhcp_perfmon.so\"
+AM_CXXFLAGS = $(KEA_CXXFLAGS)
+
+if USE_STATIC_LINK
+AM_LDFLAGS = -static
+endif
+
+EXTRA_DIST =
+
+CLEANFILES = *.gcno *.gcda
+
+TESTS_ENVIRONMENT = \
+	$(LIBTOOL) --mode=execute $(VALGRIND_COMMAND)
+
+if HAVE_GTEST
+
+TESTS = hook_load_unittests
+
+hook_load_unittests_SOURCES  =
+hook_load_unittests_SOURCES += load_unload_unittests.cc
+hook_load_unittests_SOURCES += run_unittests.cc
+hook_load_unittests_CPPFLAGS = $(AM_CPPFLAGS) $(GTEST_INCLUDES) $(LOG4CPLUS_INCLUDES)
+hook_load_unittests_CXXFLAGS = $(AM_CXXFLAGS)
+hook_load_unittests_LDFLAGS = $(AM_LDFLAGS) $(GTEST_LDFLAGS)
+
+hook_load_unittests_LDADD  = $(top_builddir)/src/lib/dhcpsrv/libkea-dhcpsrv.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/process/libkea-process.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/eval/libkea-eval.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/dhcp_ddns/libkea-dhcp_ddns.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/stats/libkea-stats.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/config/libkea-cfgclient.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/http/libkea-http.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/dhcp/libkea-dhcp++.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/hooks/libkea-hooks.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/database/libkea-database.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/cc/libkea-cc.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/dns/libkea-dns++.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/cryptolink/libkea-cryptolink.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/log/libkea-log.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/util/libkea-util.la
+hook_load_unittests_LDADD += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
+hook_load_unittests_LDADD += $(LOG4CPLUS_LIBS)
+hook_load_unittests_LDADD += $(CRYPTO_LIBS)
+hook_load_unittests_LDADD += $(BOOST_LIBS)
+hook_load_unittests_LDADD += $(GTEST_LDADD)
+
+noinst_PROGRAMS = $(TESTS)
+
+endif

src/hooks/dhcp/perfmon/libloadtests/load_unload_unittests.cc

@@ -0,0 +1,64 @@
+// Copyright (C) 2024 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/.
+
+/// @file This file contains tests which exercise the load and unload
+/// functions in the perfmon hook library. In order to test the load
+/// function, one must be able to pass it hook library parameters. The
+/// the only way to populate these parameters is by actually loading the
+/// library via HooksManager::loadLibraries().
+
+#include <config.h>
+
+#include <cc/data.h>
+#include <dhcpsrv/cfgmgr.h>
+#include <hooks/hooks_manager.h>
+#include <process/daemon.h>
+#include <testutils/gtest_utils.h>
+#include <testutils/lib_load_test_fixture.h>
+
+#include <gtest/gtest.h>
+#include <errno.h>
+
+using namespace std;
+using namespace isc;
+using namespace isc::hooks;
+using namespace isc::data;
+using namespace isc::dhcp;
+using namespace isc::process;
+
+namespace {
+
+/// @brief Test fixture for testing loading and unloading the stat cmds library
+class PerfMonLibLoadTest : public isc::test::LibLoadTest {
+public:
+    /// @brief Constructor
+    PerfMonLibLoadTest() : LibLoadTest(LIBDHCP_PERFMON_SO) {
+    }
+
+    /// @brief Destructor
+    virtual ~PerfMonLibLoadTest() {
+        unloadLibraries();
+    }
+};
+
+// Simple V4 test that checks the library can be loaded and unloaded several times.
+TEST_F(PerfMonLibLoadTest, validLoad4) {
+    validDaemonTest("kea-dhcp4");
+}
+
+// Simple V6 test that checks the library can be loaded and unloaded several times.
+TEST_F(PerfMonLibLoadTest, validLoad6) {
+    validDaemonTest("kea-dhcp6", AF_INET6);
+}
+
+// Simple V6 test that checks the library cannot by loaded by invalid daemons.
+TEST_F(PerfMonLibLoadTest, invalidDaemonLoad) {
+    invalidDaemonTest("kea-ctrl-agent");
+    invalidDaemonTest("kea-dhcp-ddns");
+    invalidDaemonTest("bogus");
+}
+
+} // end of anonymous namespace

src/hooks/dhcp/perfmon/libloadtests/run_unittests.cc

@@ -0,0 +1,20 @@
+// Copyright (C) 2022 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the End User License
+// Agreement. See COPYING file in the premium/ directory.
+
+#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);
+}

src/hooks/dhcp/perfmon/perfmon.dox

@@ -0,0 +1,43 @@
+// Copyright (C) 2024 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/.
+
+/**
+
+@page libdhcp_perfmon Kea PerfMon Hooks Library
+
+@section libdhcp_perfmonIntro Introduction
+
+Welcome to Kea PerfMon Hooks Library. This documentation is addressed to
+developers who are interested in the internal operation of the PerfMon
+library. This file provides information needed to understand and perhaps extend
+this library.
+
+This documentation is stand-alone: you should have read and understood the <a
+href="https://reports.kea.isc.org/dev_guide/">Kea Developer's Guide</a> and in
+particular its section about hooks.
+
+@section perfmon PerfMon Overview
+
+PerfMon (or perfmon) is a Hook library that can be loaded by
+either kea-dhcp4 and kea-dhcp6 servers to extend them with the
+ability to track and report performance related data.
+
+The initial purpose of this library is provide supplemental data and
+commands for monitoring the performance of kea-dhcp4 and kea-dhcp6
+servers in real time.
+
+
+
+     THIS LIBRARY IS CURRENTLY UNDER DEVELOPMENT
+
+
+
+
+@section perfmonMTCompatibility Multi-Threading Compatibility
+
+The PerfMon Hook library is compatible with multi-threading.
+
+*/

src/hooks/dhcp/perfmon/perfmon_callouts.cc

@@ -0,0 +1,98 @@
+// Copyright (C) 2024 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/.
+
+// Functions accessed by the hooks framework use C linkage to avoid the name
+// mangling that accompanies use of the C++ compiler as well as to avoid
+// issues related to namespaces.
+
+#include <config.h>
+
+#include <perfmon_log.h>
+#include <cc/command_interpreter.h>
+#include <dhcpsrv/cfgmgr.h>
+#include <hooks/hooks.h>
+#include <process/daemon.h>
+
+using namespace isc::dhcp;
+using namespace isc::hooks;
+using namespace isc::process;
+using namespace isc::perfmon;
+
+extern "C" {
+
+/// @brief This callout is called at the "pkt4_send" hook.
+///
+/// @param handle CalloutHandle which provides access to context.
+///
+/// @return 0 upon success, non-zero otherwise.
+int pkt4_send(CalloutHandle& handle) {
+    CalloutHandle::CalloutNextStep status = handle.getStatus();
+    if (status == CalloutHandle::NEXT_STEP_DROP ||
+        status == CalloutHandle::NEXT_STEP_SKIP) {
+        return (0);
+    }
+
+    return (0);
+}
+
+/// @brief This callout is called at the "pkt6_send" hook.
+///
+/// @param handle CalloutHandle which provides access to context.
+///
+/// @return 0 upon success, non-zero otherwise.
+int pkt6_send(CalloutHandle& handle) {
+    CalloutHandle::CalloutNextStep status = handle.getStatus();
+    if (status == CalloutHandle::NEXT_STEP_DROP ||
+        status == CalloutHandle::NEXT_STEP_SKIP) {
+        return (0);
+    }
+
+    return (0);
+}
+
+/// @brief This function is called when the library is loaded.
+///
+/// @param handle library handle
+/// @return 0 when initialization is successful, 1 otherwise
+int load(LibraryHandle& /* handle */) {
+    // Make the hook library not loadable by d2 or ca.
+    uint16_t family = CfgMgr::instance().getFamily();
+    const std::string& proc_name = Daemon::getProcName();
+    if (family == AF_INET) {
+        if (proc_name != "kea-dhcp4") {
+            isc_throw(isc::Unexpected, "Bad process name: " << proc_name
+                      << ", expected kea-dhcp4");
+        }
+    } else {
+        if (proc_name != "kea-dhcp6") {
+            isc_throw(isc::Unexpected, "Bad process name: " << proc_name
+                      << ", expected kea-dhcp6");
+        }
+    }
+
+    /// @todo register commands
+    /// handle.registerCommandCallout("command-here", handler_here);
+
+    LOG_INFO(perfmon_logger, PERFMON_INIT_OK);
+    return (0);
+}
+
+/// @brief This function is called when the library is unloaded.
+///
+/// @return 0 if deregistration was successful, 1 otherwise
+int unload() {
+    LOG_INFO(perfmon_logger, PERFMON_DEINIT_OK);
+    return (0);
+}
+
+/// @brief This function is called to retrieve the multi-threading compatibility.
+///
+/// @return 1 which means compatible with multi-threading.
+int multi_threading_compatible() {
+    return (1);
+}
+
+} // end extern "C"

src/hooks/dhcp/perfmon/perfmon_log.cc

@@ -0,0 +1,18 @@
+// Copyright (C) 2024 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 <perfmon_log.h>
+
+namespace isc {
+namespace perfmon {
+
+isc::log::Logger perfmon_logger("perfmon-hooks");
+
+}
+}
+

src/hooks/dhcp/perfmon/perfmon_log.h

@@ -0,0 +1,23 @@
+// Copyright (C) 2024 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 PERFMON_LOG_H
+#define PERFMON_LOG_H
+
+#include <log/logger_support.h>
+#include <log/macros.h>
+#include <perfmon_messages.h>
+
+namespace isc {
+namespace perfmon {
+
+extern isc::log::Logger perfmon_logger;
+
+} // end of isc::perfmon
+} // end of isc namespace
+
+
+#endif

src/hooks/dhcp/perfmon/perfmon_messages.cc

@@ -0,0 +1,25 @@
+// File created from ../../../../src/hooks/dhcp/perfmon/perfmon_messages.mes
+
+#include <cstddef>
+#include <log/message_types.h>
+#include <log/message_initializer.h>
+
+extern const isc::log::MessageID PERFMON_DEINIT_FAILED = "PERFMON_DEINIT_FAILED";
+extern const isc::log::MessageID PERFMON_DEINIT_OK = "PERFMON_DEINIT_OK";
+extern const isc::log::MessageID PERFMON_INIT_FAILED = "PERFMON_INIT_FAILED";
+extern const isc::log::MessageID PERFMON_INIT_OK = "PERFMON_INIT_OK";
+
+namespace {
+
+const char* values[] = {
+    "PERFMON_DEINIT_FAILED", "unloading PerfMon hooks library failed: %1",
+    "PERFMON_DEINIT_OK", "unloading PerfMon hooks library successful",
+    "PERFMON_INIT_FAILED", "loading PerfMon hooks library failed: %1",
+    "PERFMON_INIT_OK", "loading PerfMon hooks library successful",
+    NULL
+};
+
+const isc::log::MessageInitializer initializer(values);
+
+} // Anonymous namespace
+

src/hooks/dhcp/perfmon/perfmon_messages.h

@@ -0,0 +1,13 @@
+// File created from ../../../../src/hooks/dhcp/perfmon/perfmon_messages.mes
+
+#ifndef PERFMON_MESSAGES_H
+#define PERFMON_MESSAGES_H
+
+#include <log/message_types.h>
+
+extern const isc::log::MessageID PERFMON_DEINIT_FAILED;
+extern const isc::log::MessageID PERFMON_DEINIT_OK;
+extern const isc::log::MessageID PERFMON_INIT_FAILED;
+extern const isc::log::MessageID PERFMON_INIT_OK;
+
+#endif // PERFMON_MESSAGES_H

src/hooks/dhcp/perfmon/perfmon_messages.mes

@@ -0,0 +1,19 @@
+# Copyright (C) 2024 Internet Systems Consortium, Inc. ("ISC")
+
+% PERFMON_DEINIT_FAILED unloading PerfMon hooks library failed: %1
+This error message indicates an error unloading the PerfMon hooks
+library. The details of the error are provided as argument of
+the log message.
+
+% PERFMON_DEINIT_OK unloading PerfMon hooks library successful
+This info message indicates that the PerfMon hooks library has been
+removed successfully.
+
+% PERFMON_INIT_FAILED loading PerfMon hooks library failed: %1
+This error message indicates an error during loading the PerfMon
+hooks library. The details of the error are provided as argument of
+the log message.
+
+% PERFMON_INIT_OK loading PerfMon hooks library successful
+This info message indicates that the PerfMon hooks library has been
+loaded successfully. Enjoy!

src/hooks/dhcp/perfmon/tests/.gitignore

@@ -0,0 +1 @@
+perfmon_unittests

src/hooks/dhcp/perfmon/tests/Makefile.am

@@ -0,0 +1,56 @@
+SUBDIRS = .
+
+AM_CPPFLAGS = -I$(top_builddir)/src/lib -I$(top_srcdir)/src/lib
+AM_CPPFLAGS += -I$(top_builddir)/src/hooks/dhcp/perfmon -I$(top_srcdir)/src/hooks/dhcp/perfmon
+AM_CPPFLAGS += $(BOOST_INCLUDES)
+AM_CPPFLAGS += -DPERFMON_LIB_SO=\"$(abs_top_builddir)/src/hooks/dhcp/perfmon/.libs/libdhcp_perfmon.so\"
+AM_CPPFLAGS += -DINSTALL_PROG=\"$(abs_top_srcdir)/install-sh\"
+
+AM_CXXFLAGS = $(KEA_CXXFLAGS)
+
+if USE_STATIC_LINK
+AM_LDFLAGS = -static
+endif
+
+# Unit test data files need to get installed.
+EXTRA_DIST =
+
+CLEANFILES = *.gcno *.gcda
+
+TESTS_ENVIRONMENT = $(LIBTOOL) --mode=execute $(VALGRIND_COMMAND)
+
+LOG_COMPILER = $(LIBTOOL)
+AM_LOG_FLAGS = --mode=execute
+
+TESTS =
+if HAVE_GTEST
+TESTS += perfmon_unittests
+
+perfmon_unittests_SOURCES = run_unittests.cc
+#perfmon_unittests_SOURCES += perfmon_unittests.cc
+
+perfmon_unittests_CPPFLAGS = $(AM_CPPFLAGS) $(GTEST_INCLUDES) $(LOG4CPLUS_INCLUDES)
+
+perfmon_unittests_LDFLAGS  = $(AM_LDFLAGS) $(CRYPTO_LDFLAGS) $(GTEST_LDFLAGS)
+
+perfmon_unittests_CXXFLAGS = $(AM_CXXFLAGS)
+
+perfmon_unittests_LDADD  = $(top_builddir)/src/hooks/dhcp/perfmon/libperfmon.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/process/libkea-process.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/stats/libkea-stats.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/dhcp/libkea-dhcp++.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/hooks/libkea-hooks.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/database/libkea-database.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/cc/libkea-cc.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/dns/libkea-dns++.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/cryptolink/libkea-cryptolink.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/log/libkea-log.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/util/libkea-util.la
+perfmon_unittests_LDADD += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
+perfmon_unittests_LDADD += $(LOG4CPLUS_LIBS)
+perfmon_unittests_LDADD += $(CRYPTO_LIBS)
+perfmon_unittests_LDADD += $(BOOST_LIBS)
+perfmon_unittests_LDADD += $(GTEST_LDADD)
+endif
+noinst_PROGRAMS = $(TESTS)

src/hooks/dhcp/perfmon/tests/run_unittests.cc

@@ -0,0 +1,19 @@
+// 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);
+}

src/hooks/dhcp/perfmon/version.cc

@@ -0,0 +1,17 @@
+// 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 <hooks/hooks.h>
+
+extern "C" {
+
+/// @brief returns Kea hooks version.
+int version() {
+    return (KEA_HOOKS_VERSION);
+}
+
+}