sd_event_loop.cpp - openbmc/phosphor-net-ipmid - Gitiles

 #include <netinet/in.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 #include <systemd/sd-daemon.h>
 #include <phosphor-logging/log.hpp>
 #include "main.hpp"
 #include "message_handler.hpp"
 #include "sd_event_loop.hpp"

 namespace eventloop
 {
 using namespace phosphor::logging;

 static int udp623Handler(sd_event_source* es, int fd, uint32_t revents,
                          void* userdata)
 {
     std::shared_ptr<udpsocket::Channel> channelPtr;
     struct timeval timeout;
     timeout.tv_sec = SELECT_CALL_TIMEOUT;
     timeout.tv_usec = 0;

     try
     {
         channelPtr.reset(new udpsocket::Channel(fd, timeout));

         // Initialize the Message Handler with the socket channel
         message::Handler msgHandler(channelPtr);


         std::unique_ptr<message::Message> inMessage;

         // Read the incoming IPMI packet
         inMessage = msgHandler.receive();
         if (inMessage == nullptr)
         {
             return 0;
         }

         // Execute the Command
         auto outMessage = msgHandler.executeCommand(*(inMessage.get()));
         if (outMessage == nullptr)
         {
             return 0;
         }

         // Send the response IPMI Message
         msgHandler.send(*(outMessage.get()));
     }
     catch (std::exception& e)
     {
         log<level::ERR>("Executing the IPMI message failed");
         log<level::ERR>(e.what());
     }

     return 0;
 }

 static int consoleInputHandler(sd_event_source* es, int fd, uint32_t revents,
                                void* userdata)
 {
     try
     {
         int readSize = 0;

         if (ioctl(fd, FIONREAD, &readSize) < 0)
         {
             log<level::ERR>("ioctl failed for FIONREAD:",
                     entry("ERRNO=%d", errno));
             return 0;
         }

         std::vector<uint8_t> buffer(readSize);
         auto bufferSize = buffer.size();
         ssize_t readDataLen = 0;

         readDataLen = read(fd, buffer.data(), bufferSize);

         // Update the Console buffer with data read from the socket
         if (readDataLen > 0)
         {
             buffer.resize(readDataLen);
             std::get<sol::Manager&>(singletonPool).dataBuffer.write(buffer);
         }
         else if (readDataLen == 0)
         {
             log<level::ERR>("Connection Closed for host console socket");
         }
         else if (readDataLen < 0) // Error
         {
             log<level::ERR>("Reading from host console socket failed:",
                     entry("ERRNO=%d", errno));
         }
     }
     catch (std::exception& e)
     {
         log<level::ERR>(e.what());
     }

     return 0;
 }

 static int charAccTimerHandler(sd_event_source* s, uint64_t usec,
                                void *userdata)
 {
     // The instance is hardcoded to 1, in the case of supporting multiple
     // payload instances we would need to populate it from userdata
     uint8_t instance = 1;
     int rc = 0;
     auto bufferSize = std::get<sol::Manager&>(singletonPool).dataBuffer.size();

     try
     {
         if(bufferSize > 0)
         {
             auto& context = std::get<sol::Manager&>(singletonPool).getContext
                     (instance);

             rc = context.sendOutboundPayload();

             if (rc == 0)
             {
                 return 0;
             }
         }

         std::get<eventloop::EventLoop&>(singletonPool).switchTimer(
                 instance, Timers::ACCUMULATE, true);
     }
     catch (std::exception& e)
     {
         log<level::ERR>(e.what());
     }

     return 0;
 }

 static int retryTimerHandler(sd_event_source* s, uint64_t usec,
                              void *userdata)
 {
     // The instance is hardcoded to 1, in the case of supporting multiple
     // payload instances we would need to populate it from userdata
     uint8_t instance = 1;

     try
     {
         auto& context = std::get<sol::Manager&>(singletonPool).getContext
                 (instance);

         if (context.retryCounter)
         {
             --context.retryCounter;
             std::get<eventloop::EventLoop&>(singletonPool).switchTimer
                     (instance, Timers::RETRY, true);
             context.resendPayload(sol::Context::noClear);
         }
         else
         {
             context.retryCounter = context.maxRetryCount;
             context.resendPayload(sol::Context::clear);
             std::get<eventloop::EventLoop&>(singletonPool).switchTimer
                     (instance, Timers::RETRY, false);
             std::get<eventloop::EventLoop&>(singletonPool).switchTimer
                     (instance, Timers::ACCUMULATE, true);
         }
     }
     catch (std::exception& e)
     {
         log<level::ERR>(e.what());
     }

     return 0;
 }

 int EventLoop::startEventLoop()
 {
     int fd = -1;
     int r = 0;
     int listen_fd;
     sigset_t ss;
     sd_event_source* source = nullptr;
     auto bus = ipmid_get_sd_bus_connection();

     r = sd_event_default(&event);
     if (r < 0)
     {
         goto finish;
     }

     // Attach the bus to sd_event to service user requests
     r = sd_bus_attach_event(bus, event, SD_EVENT_PRIORITY_NORMAL);
     if (r < 0)
     {
         goto finish;
     }

     if (sigemptyset(&ss) < 0 || sigaddset(&ss, SIGTERM) < 0 ||
         sigaddset(&ss, SIGINT) < 0)
     {
         r = -errno;
         goto finish;
     }

     /* Block SIGTERM first, so that the event loop can handle it */
     if (sigprocmask(SIG_BLOCK, &ss, nullptr) < 0)
     {
         r = -errno;
         goto finish;
     }

     /* Let's make use of the default handler and "floating" reference features
      * of sd_event_add_signal() */
     r = sd_event_add_signal(event, nullptr, SIGTERM, nullptr, nullptr);
     if (r < 0)
     {
         goto finish;
     }

     r = sd_event_add_signal(event, nullptr, SIGINT, nullptr, nullptr);
     if (r < 0)
     {
         goto finish;
     }

     //Create our own socket if SysD did not supply one.
     listen_fd = sd_listen_fds(0);
     if (listen_fd == 1)
     {
         fd = SD_LISTEN_FDS_START;
     }
     else if (listen_fd > 1)
     {
         log<level::ERR>("Too many file descriptors received");
         goto finish;
     }
     else
     {
         struct sockaddr_in address;
         if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == 0)
         {
             r = -errno;
             log<level::ERR>("Unable to manually open socket");
             goto finish;
         }

         address.sin_family = AF_INET;
         address.sin_addr.s_addr = INADDR_ANY;
         address.sin_port = htons(IPMI_STD_PORT);

         if (bind(fd, (struct sockaddr *)&address, sizeof(address)) < 0)
         {
             r = -errno;
             log<level::ERR>("Unable to bind socket");
             goto finish;
         }
     }

     r = sd_event_add_io(event, &source, fd, EPOLLIN, udp623Handler, nullptr);
     if (r < 0)
     {
         goto finish;
     }

     udpIPMI.reset(source);
     source = nullptr;

     r = sd_event_loop(event);

 finish:
     event = sd_event_unref(event);

     if (fd >= 0)
     {
         (void) close(fd);
     }

     if (r < 0)
     {
         log<level::ERR>("Event Loop Failure:",
                 entry("FAILURE=%s", strerror(-r)));
     }

     return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 }

 void EventLoop::startHostConsole(const sol::CustomFD& fd)
 {
     int rc = 0;

     if((fd() == -1) || hostConsole.get())
     {
         throw std::runtime_error("Console descriptor already added");
     }

     sd_event_source* source = nullptr;

     // Add the fd to the event loop for EPOLLIN
     rc = sd_event_add_io(
             event, &source, fd(), EPOLLIN, consoleInputHandler, nullptr);
     if (rc < 0)
     {
         throw std::runtime_error("Failed to add socket descriptor");
     }

     hostConsole.reset(source);
     source=nullptr;
 }

 void EventLoop::stopHostConsole()
 {
     int rc = 0;

     if (hostConsole.get())
     {
         // Disable the host console payload
         rc = sd_event_source_set_enabled(hostConsole.get(), SD_EVENT_OFF);
         if (rc < 0)
         {
             log<level::ERR>("Failed to disable the host console socket",
                     entry("RC=%d", rc));
         }

         hostConsole.reset();
     }
 }

 void EventLoop::startSOLPayloadInstance(uint8_t payloadInst,
                                         IntervalType accumulateInterval,
                                         IntervalType retryInterval)
 {
     auto instance = payloadInst;
     sd_event_source* accTimerSource = nullptr;
     sd_event_source* retryTimerSource = nullptr;
     int rc = 0;
     uint64_t currentTime = 0;

     rc = sd_event_now(event, CLOCK_MONOTONIC, &currentTime);
     if (rc < 0)
     {
         log<level::ERR>("Failed to get the current timestamp",
                 entry("RC=%d", rc));
         throw std::runtime_error("Failed to get current timestamp");
     }

     // Create character accumulate timer
     rc = sd_event_add_time(event,
                            &accTimerSource,
                            CLOCK_MONOTONIC,
                            currentTime + accumulateInterval.count(),
                            0,
                            charAccTimerHandler,
                            static_cast<void *>(&instance));
     if (rc < 0)
     {
         log<level::ERR>("Failed to setup the accumulate timer",
                 entry("RC=%d", rc));
         throw std::runtime_error("Failed to setup accumulate timer");
     }

     // Create retry interval timer and add to the event loop
     rc = sd_event_add_time(event,
                            &retryTimerSource,
                            CLOCK_MONOTONIC,
                            currentTime + retryInterval.count(),
                            0,
                            retryTimerHandler,
                            static_cast<void *>(&instance));
     if (rc < 0)
     {
         log<level::ERR>("Failed to setup the retry timer",
                 entry("RC=%d", rc));
         throw std::runtime_error("Failed to setup retry timer");
     }

     // Enable the Character Accumulate Timer
     rc = sd_event_source_set_enabled(accTimerSource, SD_EVENT_ONESHOT);
     if (rc < 0)
     {
         log<level::ERR>("Failed to enable the accumulate timer",
                 entry("RC=%d", rc));
         throw std::runtime_error("Failed to enable accumulate timer");
     }

     // Disable the Retry Interval Timer
     rc = sd_event_source_set_enabled(retryTimerSource, SD_EVENT_OFF);
     if (rc < 0)
     {
         log<level::ERR>("Failed to disable the retry timer",
                 entry("RC=%d", rc));
         throw std::runtime_error("Failed to disable retry timer");
     }

     EventSource accEventSource(accTimerSource);
     EventSource retryEventSource(retryTimerSource);
     accTimerSource = nullptr;
     retryTimerSource = nullptr;

     TimerMap timer;
     timer.emplace(Timers::ACCUMULATE, std::make_tuple(std::move(accEventSource),
                                                       accumulateInterval));
     timer.emplace(Timers::RETRY, std::make_tuple(std::move(retryEventSource),
                                                  retryInterval));
     payloadInfo.emplace(instance, std::move(timer));
 }

 void EventLoop::stopSOLPayloadInstance(uint8_t payloadInst)
 {
     auto iter = payloadInfo.find(payloadInst);
     if (iter == payloadInfo.end())
     {
         log<level::ERR>("SOL Payload instance not found",
                 entry("PAYLOADINST=%d", payloadInst));
         throw std::runtime_error("SOL payload instance not found");
     }

     int rc = 0;

     /* Destroy the character accumulate timer event source */
     rc = sd_event_source_set_enabled(
             (std::get<0>(iter->second.at(Timers::ACCUMULATE))).get(),
             SD_EVENT_OFF);
     if (rc < 0)
     {
         log<level::ERR>("Failed to disable the character accumulate timer",
                 entry("RC=%d", rc));
         payloadInfo.erase(payloadInst);
         throw std::runtime_error("Failed to disable accumulate timer");
     }

     /* Destroy the retry interval timer event source */
     rc = sd_event_source_set_enabled(
             (std::get<0>(iter->second.at(Timers::RETRY))).get(),
             SD_EVENT_OFF);
     if (rc < 0)
     {
         log<level::ERR>("Failed to disable the retry timer",
                 entry("RC=%d", rc));
         payloadInfo.erase(payloadInst);
         throw std::runtime_error("Failed to disable retry timer");
     }

     payloadInfo.erase(payloadInst);
 }

 void EventLoop::switchTimer(uint8_t payloadInst,
                             Timers type,
                             bool status)
 {
     auto iter = payloadInfo.find(payloadInst);
     if (iter == payloadInfo.end())
     {
         log<level::ERR>("SOL Payload instance not found",
                 entry("PAYLOADINST=%d", payloadInst));
         throw std::runtime_error("SOL Payload instance not found");
     }

     int rc = 0;
     auto source = (std::get<0>(iter->second.at(type))).get();
     auto interval = std::get<1>(iter->second.at(type));

     // Turn OFF the timer
     if (!status)
     {
         rc = sd_event_source_set_enabled(source, SD_EVENT_OFF);
         if (rc < 0)
         {
             log<level::ERR>("Failed to disable the timer", entry("RC=%d", rc));
             throw std::runtime_error("Failed to disable timer");
         }
         return;
     }

     // Turn ON the timer
     uint64_t currentTime = 0;
     rc = sd_event_now(event, CLOCK_MONOTONIC, &currentTime);
     if (rc < 0)
     {
         log<level::ERR>("Failed to get the current timestamp",
                 entry("RC=%d", rc));
         throw std::runtime_error("Failed to get current timestamp");
     }

     rc = sd_event_source_set_time(source, currentTime + interval.count());
     if (rc < 0)
     {
         log<level::ERR>("sd_event_source_set_time function failed",
                 entry("RC=%d", rc));
         throw std::runtime_error("sd_event_source_set_time function failed");
     }

     rc = sd_event_source_set_enabled(source, SD_EVENT_ONESHOT);
     if (rc < 0)
     {
         log<level::ERR>("Failed to enable the timer", entry("RC=%d",rc));
         throw std::runtime_error("Failed to enable timer");
     }
 }

 } // namespace eventloop
	#include <netinet/in.h>
	#include <sys/ioctl.h>
	#include <sys/socket.h>
	#include <systemd/sd-daemon.h>
	#include <phosphor-logging/log.hpp>
	#include "main.hpp"
	#include "message_handler.hpp"
	#include "sd_event_loop.hpp"

	namespace eventloop
	{
	using namespace phosphor::logging;

	static int udp623Handler(sd_event_source* es, int fd, uint32_t revents,
	void* userdata)
	{
	std::shared_ptr<udpsocket::Channel> channelPtr;
	struct timeval timeout;
	timeout.tv_sec = SELECT_CALL_TIMEOUT;
	timeout.tv_usec = 0;

	try
	{
	channelPtr.reset(new udpsocket::Channel(fd, timeout));

	// Initialize the Message Handler with the socket channel
	message::Handler msgHandler(channelPtr);


	std::unique_ptr<message::Message> inMessage;

	// Read the incoming IPMI packet
	inMessage = msgHandler.receive();
	if (inMessage == nullptr)
	{
	return 0;
	}

	// Execute the Command
	auto outMessage = msgHandler.executeCommand(*(inMessage.get()));
	if (outMessage == nullptr)
	{
	return 0;
	}

	// Send the response IPMI Message
	msgHandler.send(*(outMessage.get()));
	}
	catch (std::exception& e)
	{
	log<level::ERR>("Executing the IPMI message failed");
	log<level::ERR>(e.what());
	}

	return 0;
	}

	static int consoleInputHandler(sd_event_source* es, int fd, uint32_t revents,
	void* userdata)
	{
	try
	{
	int readSize = 0;

	if (ioctl(fd, FIONREAD, &readSize) < 0)
	{
	log<level::ERR>("ioctl failed for FIONREAD:",
	entry("ERRNO=%d", errno));
	return 0;
	}

	std::vector<uint8_t> buffer(readSize);
	auto bufferSize = buffer.size();
	ssize_t readDataLen = 0;

	readDataLen = read(fd, buffer.data(), bufferSize);

	// Update the Console buffer with data read from the socket
	if (readDataLen > 0)
	{
	buffer.resize(readDataLen);
	std::get<sol::Manager&>(singletonPool).dataBuffer.write(buffer);
	}
	else if (readDataLen == 0)
	{
	log<level::ERR>("Connection Closed for host console socket");
	}
	else if (readDataLen < 0) // Error
	{
	log<level::ERR>("Reading from host console socket failed:",
	entry("ERRNO=%d", errno));
	}
	}
	catch (std::exception& e)
	{
	log<level::ERR>(e.what());
	}

	return 0;
	}

	static int charAccTimerHandler(sd_event_source* s, uint64_t usec,
	void *userdata)
	{
	// The instance is hardcoded to 1, in the case of supporting multiple
	// payload instances we would need to populate it from userdata
	uint8_t instance = 1;
	int rc = 0;
	auto bufferSize = std::get<sol::Manager&>(singletonPool).dataBuffer.size();

	try
	{
	if(bufferSize > 0)
	{
	auto& context = std::get<sol::Manager&>(singletonPool).getContext
	(instance);

	rc = context.sendOutboundPayload();

	if (rc == 0)
	{
	return 0;
	}
	}

	std::get<eventloop::EventLoop&>(singletonPool).switchTimer(
	instance, Timers::ACCUMULATE, true);
	}
	catch (std::exception& e)
	{
	log<level::ERR>(e.what());
	}

	return 0;
	}

	static int retryTimerHandler(sd_event_source* s, uint64_t usec,
	void *userdata)
	{
	// The instance is hardcoded to 1, in the case of supporting multiple
	// payload instances we would need to populate it from userdata
	uint8_t instance = 1;

	try
	{
	auto& context = std::get<sol::Manager&>(singletonPool).getContext
	(instance);

	if (context.retryCounter)
	{
	--context.retryCounter;
	std::get<eventloop::EventLoop&>(singletonPool).switchTimer
	(instance, Timers::RETRY, true);
	context.resendPayload(sol::Context::noClear);
	}
	else
	{
	context.retryCounter = context.maxRetryCount;
	context.resendPayload(sol::Context::clear);
	std::get<eventloop::EventLoop&>(singletonPool).switchTimer
	(instance, Timers::RETRY, false);
	std::get<eventloop::EventLoop&>(singletonPool).switchTimer
	(instance, Timers::ACCUMULATE, true);
	}
	}
	catch (std::exception& e)
	{
	log<level::ERR>(e.what());
	}

	return 0;
	}

	int EventLoop::startEventLoop()
	{
	int fd = -1;
	int r = 0;
	int listen_fd;
	sigset_t ss;
	sd_event_source* source = nullptr;
	auto bus = ipmid_get_sd_bus_connection();

	r = sd_event_default(&event);
	if (r < 0)
	{
	goto finish;
	}

	// Attach the bus to sd_event to service user requests
	r = sd_bus_attach_event(bus, event, SD_EVENT_PRIORITY_NORMAL);
	if (r < 0)
	{
	goto finish;
	}

	if (sigemptyset(&ss) < 0 \|\| sigaddset(&ss, SIGTERM) < 0 \|\|
	sigaddset(&ss, SIGINT) < 0)
	{
	r = -errno;
	goto finish;
	}

	/* Block SIGTERM first, so that the event loop can handle it */
	if (sigprocmask(SIG_BLOCK, &ss, nullptr) < 0)
	{
	r = -errno;
	goto finish;
	}

	/* Let's make use of the default handler and "floating" reference features
	* of sd_event_add_signal() */
	r = sd_event_add_signal(event, nullptr, SIGTERM, nullptr, nullptr);
	if (r < 0)
	{
	goto finish;
	}

	r = sd_event_add_signal(event, nullptr, SIGINT, nullptr, nullptr);
	if (r < 0)
	{
	goto finish;
	}

	//Create our own socket if SysD did not supply one.
	listen_fd = sd_listen_fds(0);
	if (listen_fd == 1)
	{
	fd = SD_LISTEN_FDS_START;
	}
	else if (listen_fd > 1)
	{
	log<level::ERR>("Too many file descriptors received");
	goto finish;
	}
	else
	{
	struct sockaddr_in address;
	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == 0)
	{
	r = -errno;
	log<level::ERR>("Unable to manually open socket");
	goto finish;
	}

	address.sin_family = AF_INET;
	address.sin_addr.s_addr = INADDR_ANY;
	address.sin_port = htons(IPMI_STD_PORT);

	if (bind(fd, (struct sockaddr *)&address, sizeof(address)) < 0)
	{
	r = -errno;
	log<level::ERR>("Unable to bind socket");
	goto finish;
	}
	}

	r = sd_event_add_io(event, &source, fd, EPOLLIN, udp623Handler, nullptr);
	if (r < 0)
	{
	goto finish;
	}

	udpIPMI.reset(source);
	source = nullptr;

	r = sd_event_loop(event);

	finish:
	event = sd_event_unref(event);

	if (fd >= 0)
	{
	(void) close(fd);
	}

	if (r < 0)
	{
	log<level::ERR>("Event Loop Failure:",
	entry("FAILURE=%s", strerror(-r)));
	}

	return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
	}

	void EventLoop::startHostConsole(const sol::CustomFD& fd)
	{
	int rc = 0;

	if((fd() == -1) \|\| hostConsole.get())
	{
	throw std::runtime_error("Console descriptor already added");
	}

	sd_event_source* source = nullptr;

	// Add the fd to the event loop for EPOLLIN
	rc = sd_event_add_io(
	event, &source, fd(), EPOLLIN, consoleInputHandler, nullptr);
	if (rc < 0)
	{
	throw std::runtime_error("Failed to add socket descriptor");
	}

	hostConsole.reset(source);
	source=nullptr;
	}

	void EventLoop::stopHostConsole()
	{
	int rc = 0;

	if (hostConsole.get())
	{
	// Disable the host console payload
	rc = sd_event_source_set_enabled(hostConsole.get(), SD_EVENT_OFF);
	if (rc < 0)
	{
	log<level::ERR>("Failed to disable the host console socket",
	entry("RC=%d", rc));
	}

	hostConsole.reset();
	}
	}

	void EventLoop::startSOLPayloadInstance(uint8_t payloadInst,
	IntervalType accumulateInterval,
	IntervalType retryInterval)
	{
	auto instance = payloadInst;
	sd_event_source* accTimerSource = nullptr;
	sd_event_source* retryTimerSource = nullptr;
	int rc = 0;
	uint64_t currentTime = 0;

	rc = sd_event_now(event, CLOCK_MONOTONIC, &currentTime);
	if (rc < 0)
	{
	log<level::ERR>("Failed to get the current timestamp",
	entry("RC=%d", rc));
	throw std::runtime_error("Failed to get current timestamp");
	}

	// Create character accumulate timer
	rc = sd_event_add_time(event,
	&accTimerSource,
	CLOCK_MONOTONIC,
	currentTime + accumulateInterval.count(),
	0,
	charAccTimerHandler,
	static_cast<void *>(&instance));
	if (rc < 0)
	{
	log<level::ERR>("Failed to setup the accumulate timer",
	entry("RC=%d", rc));
	throw std::runtime_error("Failed to setup accumulate timer");
	}

	// Create retry interval timer and add to the event loop
	rc = sd_event_add_time(event,
	&retryTimerSource,
	CLOCK_MONOTONIC,
	currentTime + retryInterval.count(),
	0,
	retryTimerHandler,
	static_cast<void *>(&instance));
	if (rc < 0)
	{
	log<level::ERR>("Failed to setup the retry timer",
	entry("RC=%d", rc));
	throw std::runtime_error("Failed to setup retry timer");
	}

	// Enable the Character Accumulate Timer
	rc = sd_event_source_set_enabled(accTimerSource, SD_EVENT_ONESHOT);
	if (rc < 0)
	{
	log<level::ERR>("Failed to enable the accumulate timer",
	entry("RC=%d", rc));
	throw std::runtime_error("Failed to enable accumulate timer");
	}

	// Disable the Retry Interval Timer
	rc = sd_event_source_set_enabled(retryTimerSource, SD_EVENT_OFF);
	if (rc < 0)
	{
	log<level::ERR>("Failed to disable the retry timer",
	entry("RC=%d", rc));
	throw std::runtime_error("Failed to disable retry timer");
	}

	EventSource accEventSource(accTimerSource);
	EventSource retryEventSource(retryTimerSource);
	accTimerSource = nullptr;
	retryTimerSource = nullptr;

	TimerMap timer;
	timer.emplace(Timers::ACCUMULATE, std::make_tuple(std::move(accEventSource),
	accumulateInterval));
	timer.emplace(Timers::RETRY, std::make_tuple(std::move(retryEventSource),
	retryInterval));
	payloadInfo.emplace(instance, std::move(timer));
	}

	void EventLoop::stopSOLPayloadInstance(uint8_t payloadInst)
	{
	auto iter = payloadInfo.find(payloadInst);
	if (iter == payloadInfo.end())
	{
	log<level::ERR>("SOL Payload instance not found",
	entry("PAYLOADINST=%d", payloadInst));
	throw std::runtime_error("SOL payload instance not found");
	}

	int rc = 0;

	/* Destroy the character accumulate timer event source */
	rc = sd_event_source_set_enabled(
	(std::get<0>(iter->second.at(Timers::ACCUMULATE))).get(),
	SD_EVENT_OFF);
	if (rc < 0)
	{
	log<level::ERR>("Failed to disable the character accumulate timer",
	entry("RC=%d", rc));
	payloadInfo.erase(payloadInst);
	throw std::runtime_error("Failed to disable accumulate timer");
	}

	/* Destroy the retry interval timer event source */
	rc = sd_event_source_set_enabled(
	(std::get<0>(iter->second.at(Timers::RETRY))).get(),
	SD_EVENT_OFF);
	if (rc < 0)
	{
	log<level::ERR>("Failed to disable the retry timer",
	entry("RC=%d", rc));
	payloadInfo.erase(payloadInst);
	throw std::runtime_error("Failed to disable retry timer");
	}

	payloadInfo.erase(payloadInst);
	}

	void EventLoop::switchTimer(uint8_t payloadInst,
	Timers type,
	bool status)
	{
	auto iter = payloadInfo.find(payloadInst);
	if (iter == payloadInfo.end())
	{
	log<level::ERR>("SOL Payload instance not found",
	entry("PAYLOADINST=%d", payloadInst));
	throw std::runtime_error("SOL Payload instance not found");
	}

	int rc = 0;
	auto source = (std::get<0>(iter->second.at(type))).get();
	auto interval = std::get<1>(iter->second.at(type));

	// Turn OFF the timer
	if (!status)
	{
	rc = sd_event_source_set_enabled(source, SD_EVENT_OFF);
	if (rc < 0)
	{
	log<level::ERR>("Failed to disable the timer", entry("RC=%d", rc));
	throw std::runtime_error("Failed to disable timer");
	}
	return;
	}

	// Turn ON the timer
	uint64_t currentTime = 0;
	rc = sd_event_now(event, CLOCK_MONOTONIC, &currentTime);
	if (rc < 0)
	{
	log<level::ERR>("Failed to get the current timestamp",
	entry("RC=%d", rc));
	throw std::runtime_error("Failed to get current timestamp");
	}

	rc = sd_event_source_set_time(source, currentTime + interval.count());
	if (rc < 0)
	{
	log<level::ERR>("sd_event_source_set_time function failed",
	entry("RC=%d", rc));
	throw std::runtime_error("sd_event_source_set_time function failed");
	}

	rc = sd_event_source_set_enabled(source, SD_EVENT_ONESHOT);
	if (rc < 0)
	{
	log<level::ERR>("Failed to enable the timer", entry("RC=%d",rc));
	throw std::runtime_error("Failed to enable timer");
	}
	}

	} // namespace eventloop