Merge pull request 'new tmtc unix udp bridge' (#141) from KSat/fsfw:mueller/feature/TmTcUnixBridge into master

Reviewed-on: fsfw/fsfw#141

globalfunctions/timevalOperations.cpp

@@ -1,92 +1,99 @@
-#include "timevalOperations.h"
-
-timeval& operator+=(timeval& lhs, const timeval& rhs) {
-	int64_t sum = lhs.tv_sec * 1000000. + lhs.tv_usec;
-	sum += rhs.tv_sec * 1000000. + rhs.tv_usec;
-	lhs.tv_sec = sum / 1000000;
-	lhs.tv_usec = sum - lhs.tv_sec * 1000000;
-	return lhs;
-}
-
-timeval operator+(timeval lhs, const timeval& rhs) {
-	lhs += rhs;
-	return lhs;
-}
-
-timeval& operator-=(timeval& lhs, const timeval& rhs) {
-	int64_t sum = lhs.tv_sec * 1000000. + lhs.tv_usec;
-	sum -= rhs.tv_sec * 1000000. + rhs.tv_usec;
-	lhs.tv_sec = sum / 1000000;
-	lhs.tv_usec = sum - lhs.tv_sec * 1000000;
-	return lhs;
-}
-
-timeval operator-(timeval lhs, const timeval& rhs) {
-	lhs -= rhs;
-	return lhs;
-}
-
-double operator/(const timeval& lhs, const timeval& rhs) {
-	double lhs64 = lhs.tv_sec * 1000000. + lhs.tv_usec;
-	double rhs64 = rhs.tv_sec * 1000000. + rhs.tv_usec;
-	return lhs64 / rhs64;
-}
-
-timeval& operator/=(timeval& lhs, double scalar) {
-	int64_t product = lhs.tv_sec * 1000000. + lhs.tv_usec;
-	product /= scalar;
-	lhs.tv_sec = product / 1000000;
-	lhs.tv_usec = product - lhs.tv_sec * 1000000;
-	return lhs;
-}
-
-timeval operator/(timeval lhs, double scalar) {
-	lhs /= scalar;
-	return lhs;
-}
-
-timeval& operator*=(timeval& lhs, double scalar) {
-	int64_t product = lhs.tv_sec * 1000000. + lhs.tv_usec;
-	product *= scalar;
-	lhs.tv_sec = product / 1000000;
-	lhs.tv_usec = product - lhs.tv_sec * 1000000;
-	return lhs;
-}
-
-timeval operator*(timeval lhs, double scalar) {
-	lhs *= scalar;
-	return lhs;
-}
-
-timeval operator*(double scalar, timeval rhs) {
-	rhs *= scalar;
-	return rhs;
-}
-
-bool operator==(const timeval& lhs, const timeval& rhs) {
-	int64_t lhs64 = lhs.tv_sec * 1000000. + lhs.tv_usec;
-	int64_t rhs64 = rhs.tv_sec * 1000000. + rhs.tv_usec;
-	return lhs64 == rhs64;
-}
-bool operator!=(const timeval& lhs, const timeval& rhs) {
-	return !operator==(lhs, rhs);
-}
-bool operator<(const timeval& lhs, const timeval& rhs) {
-	int64_t lhs64 = lhs.tv_sec * 1000000. + lhs.tv_usec;
-	int64_t rhs64 = rhs.tv_sec * 1000000. + rhs.tv_usec;
-	return lhs64 < rhs64;
-}
-bool operator>(const timeval& lhs, const timeval& rhs) {
-	return operator<(rhs, lhs);
-}
-bool operator<=(const timeval& lhs, const timeval& rhs) {
-	return !operator>(lhs, rhs);
-}
-bool operator>=(const timeval& lhs, const timeval& rhs) {
-	return !operator<(lhs, rhs);
-}
-
-double timevalOperations::toDouble(const timeval timeval) {
-	double result = timeval.tv_sec * 1000000. + timeval.tv_usec;
-	return result / 1000000.;
-}
+#include "timevalOperations.h"
+
+timeval& operator+=(timeval& lhs, const timeval& rhs) {
+	int64_t sum = lhs.tv_sec * 1000000. + lhs.tv_usec;
+	sum += rhs.tv_sec * 1000000. + rhs.tv_usec;
+	lhs.tv_sec = sum / 1000000;
+	lhs.tv_usec = sum - lhs.tv_sec * 1000000;
+	return lhs;
+}
+
+timeval operator+(timeval lhs, const timeval& rhs) {
+	lhs += rhs;
+	return lhs;
+}
+
+timeval& operator-=(timeval& lhs, const timeval& rhs) {
+	int64_t sum = lhs.tv_sec * 1000000. + lhs.tv_usec;
+	sum -= rhs.tv_sec * 1000000. + rhs.tv_usec;
+	lhs.tv_sec = sum / 1000000;
+	lhs.tv_usec = sum - lhs.tv_sec * 1000000;
+	return lhs;
+}
+
+timeval operator-(timeval lhs, const timeval& rhs) {
+	lhs -= rhs;
+	return lhs;
+}
+
+double operator/(const timeval& lhs, const timeval& rhs) {
+	double lhs64 = lhs.tv_sec * 1000000. + lhs.tv_usec;
+	double rhs64 = rhs.tv_sec * 1000000. + rhs.tv_usec;
+	return lhs64 / rhs64;
+}
+
+timeval& operator/=(timeval& lhs, double scalar) {
+	int64_t product = lhs.tv_sec * 1000000. + lhs.tv_usec;
+	product /= scalar;
+	lhs.tv_sec = product / 1000000;
+	lhs.tv_usec = product - lhs.tv_sec * 1000000;
+	return lhs;
+}
+
+timeval operator/(timeval lhs, double scalar) {
+	lhs /= scalar;
+	return lhs;
+}
+
+timeval& operator*=(timeval& lhs, double scalar) {
+	int64_t product = lhs.tv_sec * 1000000. + lhs.tv_usec;
+	product *= scalar;
+	lhs.tv_sec = product / 1000000;
+	lhs.tv_usec = product - lhs.tv_sec * 1000000;
+	return lhs;
+}
+
+timeval operator*(timeval lhs, double scalar) {
+	lhs *= scalar;
+	return lhs;
+}
+
+timeval operator*(double scalar, timeval rhs) {
+	rhs *= scalar;
+	return rhs;
+}
+
+bool operator==(const timeval& lhs, const timeval& rhs) {
+	int64_t lhs64 = lhs.tv_sec * 1000000. + lhs.tv_usec;
+	int64_t rhs64 = rhs.tv_sec * 1000000. + rhs.tv_usec;
+	return lhs64 == rhs64;
+}
+bool operator!=(const timeval& lhs, const timeval& rhs) {
+	return !operator==(lhs, rhs);
+}
+bool operator<(const timeval& lhs, const timeval& rhs) {
+	int64_t lhs64 = lhs.tv_sec * 1000000. + lhs.tv_usec;
+	int64_t rhs64 = rhs.tv_sec * 1000000. + rhs.tv_usec;
+	return lhs64 < rhs64;
+}
+bool operator>(const timeval& lhs, const timeval& rhs) {
+	return operator<(rhs, lhs);
+}
+bool operator<=(const timeval& lhs, const timeval& rhs) {
+	return !operator>(lhs, rhs);
+}
+bool operator>=(const timeval& lhs, const timeval& rhs) {
+	return !operator<(lhs, rhs);
+}
+
+double timevalOperations::toDouble(const timeval timeval) {
+	double result = timeval.tv_sec * 1000000. + timeval.tv_usec;
+	return result / 1000000.;
+}
+
+timeval timevalOperations::toTimeval(const double seconds) {
+	timeval tval;
+	tval.tv_sec = seconds;
+	tval.tv_usec = seconds *(double) 1e6 - (tval.tv_sec *1e6);
+	return tval;
+}

globalfunctions/timevalOperations.h

@@ -41,6 +41,7 @@ namespace timevalOperations {
  * @return seconds
  */
 double toDouble(const timeval timeval);
+timeval toTimeval(const double seconds);
 }
 
 #endif /* TIMEVALOPERATIONS_H_ */

osal/linux/TcUnixUdpPollingTask.cpp

@@ -0,0 +1,138 @@
+#include "TcUnixUdpPollingTask.h"
+#include "../../globalfunctions/arrayprinter.h"
+
+TcUnixUdpPollingTask::TcUnixUdpPollingTask(object_id_t objectId,
+		object_id_t tmtcUnixUdpBridge, size_t frameSize,
+		double timeoutSeconds): SystemObject(objectId),
+		tmtcBridgeId(tmtcUnixUdpBridge) {
+
+	if(frameSize > 0) {
+		this->frameSize = frameSize;
+	}
+	else {
+		this->frameSize = DEFAULT_MAX_FRAME_SIZE;
+	}
+
+	// Set up reception buffer with specified frame size.
+	// For now, it is assumed that only one frame is held in the buffer!
+	receptionBuffer.reserve(this->frameSize);
+	receptionBuffer.resize(this->frameSize);
+
+	if(timeoutSeconds == -1) {
+		receptionTimeout = DEFAULT_TIMEOUT;
+	}
+	else {
+		receptionTimeout = timevalOperations::toTimeval(timeoutSeconds);
+	}
+}
+
+TcUnixUdpPollingTask::~TcUnixUdpPollingTask() {}
+
+ReturnValue_t TcUnixUdpPollingTask::performOperation(uint8_t opCode) {
+	// Poll for new UDP datagrams in permanent loop.
+	while(1) {
+		//! Sender Address is cached here.
+		struct sockaddr_in senderAddress;
+		socklen_t senderSockLen = 0;
+		ssize_t bytesReceived = recvfrom(serverUdpSocket,
+				receptionBuffer.data(), frameSize, receptionFlags,
+				reinterpret_cast<sockaddr*>(&senderAddress), &senderSockLen);
+		if(bytesReceived < 0) {
+			// handle error
+			sif::error << "TcSocketPollingTask::performOperation: Reception"
+					"error." << std::endl;
+			handleReadError();
+
+			continue;
+		}
+//		sif::debug << "TcSocketPollingTask::performOperation: " << bytesReceived
+//				<< " bytes received" << std::endl;
+
+		ReturnValue_t result = handleSuccessfullTcRead(bytesReceived);
+		if(result != HasReturnvaluesIF::RETURN_FAILED) {
+
+		}
+		tmtcBridge->registerCommConnect();
+		tmtcBridge->checkAndSetClientAddress(senderAddress);
+	}
+	return HasReturnvaluesIF::RETURN_OK;
+}
+
+
+ReturnValue_t TcUnixUdpPollingTask::handleSuccessfullTcRead(size_t bytesRead) {
+	store_address_t storeId;
+	ReturnValue_t result = tcStore->addData(&storeId,
+			receptionBuffer.data(), bytesRead);
+	// arrayprinter::print(receptionBuffer.data(), bytesRead);
+	if (result != HasReturnvaluesIF::RETURN_OK) {
+		sif::error << "TcSerialPollingTask::transferPusToSoftwareBus: Data "
+				"storage failed" << std::endl;
+		sif::error << "Packet size: " << bytesRead << std::endl;
+		return HasReturnvaluesIF::RETURN_FAILED;
+	}
+
+	TmTcMessage message(storeId);
+
+	result  = MessageQueueSenderIF::sendMessage(targetTcDestination, &message);
+	if (result != HasReturnvaluesIF::RETURN_OK) {
+		sif::error << "Serial Polling: Sending message to queue failed"
+				<< std::endl;
+		tcStore->deleteData(storeId);
+	}
+	return result;
+}
+
+ReturnValue_t TcUnixUdpPollingTask::initialize() {
+	tcStore = objectManager->get<StorageManagerIF>(objects::TC_STORE);
+	if (tcStore == nullptr) {
+		sif::error << "TcSerialPollingTask::initialize: TC Store uninitialized!"
+				<< std::endl;
+		return ObjectManagerIF::CHILD_INIT_FAILED;
+	}
+
+	tmtcBridge = objectManager->get<TmTcUnixUdpBridge>(tmtcBridgeId);
+	if(tmtcBridge == nullptr) {
+		sif::error << "TcSocketPollingTask::TcSocketPollingTask: Invalid"
+				" TMTC bridge object!" << std::endl;
+		return ObjectManagerIF::CHILD_INIT_FAILED;
+	}
+
+	serverUdpSocket = tmtcBridge->serverSocket;
+
+	return HasReturnvaluesIF::RETURN_OK;
+}
+
+ReturnValue_t TcUnixUdpPollingTask::initializeAfterTaskCreation() {
+	// Initialize the destination after task creation. This ensures
+	// that the destination will be set in the TMTC bridge.
+	targetTcDestination = tmtcBridge->getRequestQueue();
+	return HasReturnvaluesIF::RETURN_OK;
+}
+
+void TcUnixUdpPollingTask::setTimeout(double timeoutSeconds) {
+	timeval tval;
+	tval = timevalOperations::toTimeval(timeoutSeconds);
+	int result = setsockopt(serverUdpSocket, SOL_SOCKET, SO_RCVTIMEO,
+			&tval, sizeof(receptionTimeout));
+	if(result == -1) {
+		sif::error << "TcSocketPollingTask::TcSocketPollingTask: Setting "
+				"receive timeout failed with " << strerror(errno) << std::endl;
+	}
+}
+
+// TODO: sleep after error detection to prevent spam
+void TcUnixUdpPollingTask::handleReadError() {
+	switch(errno) {
+	case(EAGAIN): {
+		// todo: When working in timeout mode, this will occur more often
+		// and is not an error.
+		sif::error << "TcUnixUdpPollingTask::handleReadError: Timeout."
+				<< std::endl;
+		break;
+	}
+	default: {
+		sif::error << "TcUnixUdpPollingTask::handleReadError: "
+				<< strerror(errno) << std::endl;
+	}
+	}
+}

osal/linux/TcUnixUdpPollingTask.h

@@ -0,0 +1,67 @@
+#ifndef FRAMEWORK_OSAL_LINUX_TCSOCKETPOLLINGTASK_H_
+#define FRAMEWORK_OSAL_LINUX_TCSOCKETPOLLINGTASK_H_
+
+#include "../../objectmanager/SystemObject.h"
+#include "../../osal/linux/TmTcUnixUdpBridge.h"
+#include "../../tasks/ExecutableObjectIF.h"
+
+#include <sys/socket.h>
+#include <vector>
+
+/**
+ * @brief 	This class can be used to implement the polling of a Unix socket,
+ * 			using UDP for now.
+ * @details
+ * The task will be blocked while the specified number of bytes has not been
+ * received, so TC reception is handled inside a separate task.
+ * This class caches the IP address of the sender. It is assumed there
+ * is only one sender for now.
+ */
+class TcUnixUdpPollingTask: public SystemObject,
+		public ExecutableObjectIF {
+	friend class TmTcUnixUdpBridge;
+public:
+	static constexpr size_t DEFAULT_MAX_FRAME_SIZE = 2048;
+	//! 0.5  default milliseconds timeout for now.
+	static constexpr timeval DEFAULT_TIMEOUT = {.tv_sec = 0, .tv_usec = 500};
+
+	TcUnixUdpPollingTask(object_id_t objectId, object_id_t tmtcUnixUdpBridge,
+			size_t frameSize = 0, double timeoutSeconds = -1);
+	virtual~ TcUnixUdpPollingTask();
+
+	/**
+	 * Turn on optional timeout for UDP polling. In the default mode,
+	 * the receive function will block until a packet is received.
+	 * @param timeoutSeconds
+	 */
+	void setTimeout(double timeoutSeconds);
+
+	virtual ReturnValue_t performOperation(uint8_t opCode) override;
+	virtual ReturnValue_t initialize() override;
+	virtual ReturnValue_t initializeAfterTaskCreation() override;
+
+protected:
+	StorageManagerIF* tcStore = nullptr;
+
+private:
+	//! TMTC bridge is cached.
+	object_id_t tmtcBridgeId = objects::NO_OBJECT;
+	TmTcUnixUdpBridge* tmtcBridge = nullptr;
+	MessageQueueId_t targetTcDestination = MessageQueueIF::NO_QUEUE;
+	//! Reception flags: https://linux.die.net/man/2/recvfrom.
+	int receptionFlags = 0;
+
+	//! Server socket, which is member of TMTC bridge and is assigned in
+	//! constructor
+	int serverUdpSocket = 0;
+
+	std::vector<uint8_t> receptionBuffer;
+
+	size_t frameSize = 0;
+	timeval receptionTimeout;
+
+	ReturnValue_t handleSuccessfullTcRead(size_t bytesRead);
+	void handleReadError();
+};
+
+#endif /* FRAMEWORK_OSAL_LINUX_TCSOCKETPOLLINGTASK_H_ */

osal/linux/TmTcUnixUdpBridge.cpp

@@ -0,0 +1,170 @@
+#include "TmTcUnixUdpBridge.h"
+#include "../../serviceinterface/ServiceInterfaceStream.h"
+#include "../../ipc/MutexHelper.h"
+
+#include <errno.h>
+#include <arpa/inet.h>
+
+
+TmTcUnixUdpBridge::TmTcUnixUdpBridge(object_id_t objectId,
+		object_id_t tcDestination, object_id_t tmStoreId, object_id_t tcStoreId,
+		uint16_t serverPort, uint16_t clientPort):
+		TmTcBridge(objectId, tcDestination, tmStoreId, tcStoreId) {
+	mutex = MutexFactory::instance()->createMutex();
+
+	uint16_t setServerPort = DEFAULT_UDP_SERVER_PORT;
+	if(serverPort != 0xFFFF) {
+		setServerPort = serverPort;
+	}
+
+	uint16_t setClientPort = DEFAULT_UDP_CLIENT_PORT;
+	if(clientPort != 0xFFFF) {
+		setClientPort = clientPort;
+	}
+
+	// Set up UDP socket: https://man7.org/linux/man-pages/man7/ip.7.html
+	//clientSocket = socket(AF_INET, SOCK_DGRAM, 0);
+	serverSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+	if(serverSocket < 0) {
+		sif::error << "TmTcUnixUdpBridge::TmTcUnixUdpBridge: Could not open"
+				" UDP socket!" << std::endl;
+		handleSocketError();
+		return;
+	}
+
+	serverAddress.sin_family = AF_INET;
+
+	// Accept packets from any interface.
+	//serverAddress.sin_addr.s_addr = inet_addr("127.73.73.0");
+	serverAddress.sin_addr.s_addr = htonl(INADDR_ANY);
+	serverAddress.sin_port = htons(setServerPort);
+	serverAddressLen = sizeof(serverAddress);
+	setsockopt(serverSocket, SOL_SOCKET, SO_REUSEADDR, &serverSocketOptions,
+			sizeof(serverSocketOptions));
+
+	clientAddress.sin_family = AF_INET;
+	clientAddress.sin_addr.s_addr = htonl(INADDR_ANY);
+	clientAddress.sin_port = htons(setClientPort);
+	clientAddressLen = sizeof(clientAddress);
+
+	int result = bind(serverSocket,
+			reinterpret_cast<struct sockaddr*>(&serverAddress),
+			serverAddressLen);
+	if(result == -1) {
+		sif::error << "TmTcUnixUdpBridge::TmTcUnixUdpBridge: Could not bind "
+				"local port " << setServerPort << " to server socket!"
+				<< std::endl;
+		handleBindError();
+		return;
+	}
+}
+
+TmTcUnixUdpBridge::~TmTcUnixUdpBridge() {
+}
+
+ReturnValue_t TmTcUnixUdpBridge::sendTm(const uint8_t *data, size_t dataLen) {
+	int flags = 0;
+
+	clientAddress.sin_addr.s_addr = htons(INADDR_ANY);
+	//clientAddress.sin_addr.s_addr = inet_addr("127.73.73.1");
+	clientAddressLen = sizeof(serverAddress);
+
+//	char ipAddress [15];
+//	sif::debug << "IP Address Sender: "<< inet_ntop(AF_INET,
+//					&clientAddress.sin_addr.s_addr, ipAddress, 15) << std::endl;
+
+	ssize_t bytesSent = sendto(serverSocket, data, dataLen, flags,
+			reinterpret_cast<sockaddr*>(&clientAddress), clientAddressLen);
+	if(bytesSent < 0) {
+		sif::error << "TmTcUnixUdpBridge::sendTm: Send operation failed."
+				<< std::endl;
+		handleSendError();
+	}
+//	sif::debug << "TmTcUnixUdpBridge::sendTm: " << bytesSent << " bytes were"
+//			" sent." << std::endl;
+	return HasReturnvaluesIF::RETURN_OK;
+}
+
+void TmTcUnixUdpBridge::checkAndSetClientAddress(sockaddr_in newAddress) {
+	MutexHelper lock(mutex, MutexIF::TimeoutType::WAITING, 10);
+
+//	char ipAddress [15];
+//	sif::debug << "IP Address Sender: "<< inet_ntop(AF_INET,
+//			&newAddress.sin_addr.s_addr, ipAddress, 15) << std::endl;
+//	sif::debug << "IP Address Old: " <<  inet_ntop(AF_INET,
+//			&clientAddress.sin_addr.s_addr, ipAddress, 15) << std::endl;
+
+	// Set new IP address if it has changed.
+	if(clientAddress.sin_addr.s_addr != newAddress.sin_addr.s_addr) {
+		clientAddress.sin_addr.s_addr = newAddress.sin_addr.s_addr;
+		clientAddressLen = sizeof(clientAddress);
+	}
+}
+
+
+void TmTcUnixUdpBridge::handleSocketError() {
+	// See: https://man7.org/linux/man-pages/man2/socket.2.html
+	switch(errno) {
+	case(EACCES):
+	case(EINVAL):
+	case(EMFILE):
+	case(ENFILE):
+	case(EAFNOSUPPORT):
+	case(ENOBUFS):
+	case(ENOMEM):
+	case(EPROTONOSUPPORT):
+		sif::error << "TmTcUnixBridge::handleSocketError: Socket creation failed"
+				<< " with " << strerror(errno) << std::endl;
+		break;
+	default:
+		sif::error << "TmTcUnixBridge::handleSocketError: Unknown error"
+				<< std::endl;
+		break;
+	}
+}
+
+void TmTcUnixUdpBridge::handleBindError() {
+	// See: https://man7.org/linux/man-pages/man2/bind.2.html
+	switch(errno) {
+	case(EACCES): {
+		/*
+		 Ephermeral ports can be shown with following command:
+		 sysctl -A | grep ip_local_port_range
+		 */
+		sif::error << "TmTcUnixBridge::handleBindError: Port access issue."
+				"Ports 1-1024 are reserved on UNIX systems and require root "
+				"rights while ephermeral ports should not be used as well."
+				<< std::endl;
+	}
+	break;
+	case(EADDRINUSE):
+	case(EBADF):
+	case(EINVAL):
+	case(ENOTSOCK):
+	case(EADDRNOTAVAIL):
+	case(EFAULT):
+	case(ELOOP):
+	case(ENAMETOOLONG):
+	case(ENOENT):
+	case(ENOMEM):
+	case(ENOTDIR):
+	case(EROFS): {
+		sif::error << "TmTcUnixBridge::handleBindError: Socket creation failed"
+				<< " with " << strerror(errno) << std::endl;
+		break;
+	}
+	default:
+		sif::error << "TmTcUnixBridge::handleBindError: Unknown error"
+				<< std::endl;
+		break;
+	}
+}
+
+void TmTcUnixUdpBridge::handleSendError() {
+	switch(errno) {
+	default:
+		sif::error << "TmTcUnixBridge::handleSendError: "
+		        << strerror(errno) << std::endl;
+	}
+}
+

osal/linux/TmTcUnixUdpBridge.h

@@ -0,0 +1,48 @@
+#ifndef FRAMEWORK_OSAL_LINUX_TMTCUNIXUDPBRIDGE_H_
+#define FRAMEWORK_OSAL_LINUX_TMTCUNIXUDPBRIDGE_H_
+
+#include "../../tmtcservices/AcceptsTelecommandsIF.h"
+#include "../../tmtcservices/TmTcBridge.h"
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/udp.h>
+
+class TmTcUnixUdpBridge: public TmTcBridge {
+	friend class TcUnixUdpPollingTask;
+public:
+	// The ports chosen here should not be used by any other process.
+	// List of used ports on Linux: /etc/services
+	static constexpr uint16_t DEFAULT_UDP_SERVER_PORT = 7301;
+	static constexpr uint16_t DEFAULT_UDP_CLIENT_PORT = 7302;
+
+	TmTcUnixUdpBridge(object_id_t objectId, object_id_t tcDestination,
+			object_id_t tmStoreId, object_id_t tcStoreId,
+			uint16_t serverPort = 0xFFFF,uint16_t clientPort = 0xFFFF);
+	virtual~ TmTcUnixUdpBridge();
+
+	void checkAndSetClientAddress(sockaddr_in clientAddress);
+
+protected:
+	virtual ReturnValue_t sendTm(const uint8_t * data, size_t dataLen) override;
+
+private:
+	int serverSocket = 0;
+
+	const int serverSocketOptions = 0;
+
+	struct sockaddr_in clientAddress;
+	socklen_t clientAddressLen = 0;
+
+	struct sockaddr_in serverAddress;
+	socklen_t serverAddressLen = 0;
+
+	//! Access to the client address is mutex protected as it is set
+	//! by another task.
+	MutexIF* mutex;
+
+	void handleSocketError();
+	void handleBindError();
+	void handleSendError();
+};
+
+#endif /* FRAMEWORK_OSAL_LINUX_TMTCUNIXUDPBRIDGE_H_ */