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171 | // 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 file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <perfmon_mgr.h><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <cc/command_interpreter.h>
#include <dhcpsrv/cfgmgr.h>
#include <hooks/hooks.h>
#include <process/daemon.h>
namespace isc {
namespace perfmon {
/// @brief PerfMonMgr singleton
PerfMonMgrPtr mgr;
} // end of namespace perfmon
}
using namespace isc::data;
using namespace isc::dhcp;
using namespace isc::hooks;
using namespace isc::log;
using namespace isc::process;
using namespace isc::perfmon;
extern "C" {
int dhcp4_srv_configured(CalloutHandle& /* handle */) {
// We do this here rather than in load() to ensure we check after the
// packet filter has been determined.
LOG_DEBUG(perfmon_logger, DBGLVL_TRACE_BASIC, PERFMON_DHCP4_SOCKET_RECEIVED_TIME_SUPPORT)
.arg(IfaceMgr::instance().isSocketReceivedTimeSupported() ? "Yes" : "No");
return (0);
}
int dhcp6_srv_configured(CalloutHandle& /* handle */) {
// We do this here rather than in load() to ensure we check after the
// packet filter has been determined.
LOG_DEBUG(perfmon_logger, DBGLVL_TRACE_BASIC, PERFMON_DHCP6_SOCKET_RECEIVED_TIME_SUPPORT)
.arg(IfaceMgr::instance().isSocketReceivedTimeSupported() ? "Yes" : "No");
return (0);
}
/// @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) {<--- Parameter 'handle' can be declared as reference to const
CalloutHandle::CalloutNextStep status = handle.getStatus();
if (status == CalloutHandle::NEXT_STEP_DROP ||
status == CalloutHandle::NEXT_STEP_SKIP) {
return (0);
}
Pkt4Ptr query;
handle.getArgument("query4", query);
Pkt4Ptr response;
handle.getArgument("response4", response);
Subnet4Ptr subnet;
handle.getArgument("subnet4", subnet);
try {
mgr->processPktEventStack(query, response, subnet);
} catch (const std::exception& ex) {
LOG_DEBUG(perfmon_logger, DBGLVL_TRACE_DETAIL, PERFMON_DHCP4_PKT_PROCESS_ERROR)
.arg(query->getLabel())
.arg(ex.what());
}
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) {<--- Parameter 'handle' can be declared as reference to const
CalloutHandle::CalloutNextStep status = handle.getStatus();
if (status == CalloutHandle::NEXT_STEP_DROP ||
status == CalloutHandle::NEXT_STEP_SKIP) {
return (0);
}
Pkt6Ptr query;
handle.getArgument("query6", query);
Pkt6Ptr response;
handle.getArgument("response6", response);
Subnet6Ptr subnet;
handle.getArgument("subnet6", subnet);
try {
mgr->processPktEventStack(query, response, subnet);
} catch (const std::exception& ex) {
LOG_DEBUG(perfmon_logger, DBGLVL_TRACE_DETAIL, PERFMON_DHCP6_PKT_PROCESS_ERROR)
.arg(query->getLabel())
.arg(ex.what());
}
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) {
try {
// Make the hook library only loadable for kea-dhcpX.
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");
}
// Instantiate the manager singleton.
mgr.reset(new PerfMonMgr(family));
// Configure the manager using the hook library's parameters.
ConstElementPtr json = handle.getParameters();
mgr->configure(json);
/// @todo register commands
/// handle.registerCommandCallout("command-here", handler_here);
} catch (const std::exception& ex) {
LOG_ERROR(perfmon_logger, PERFMON_INIT_FAILED)
.arg(ex.what());
return (1);
}
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"
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