Merge pull request 'TCP/IP module updates for Linux and Windows' (#387) from mueller/tcpip-updates into development

Reviewed-on: fsfw/fsfw#387

osal/CMakeLists.txt

@@ -32,3 +32,5 @@ else()
 	endif()
 
 endif()
+
+add_subdirectory(common)

osal/common/CMakeLists.txt

@@ -0,0 +1,3 @@
+target_sources(${LIB_FSFW_NAME} PRIVATE 
+    tcpipCommon.cpp
+)

osal/common/tcpipCommon.cpp

@@ -0,0 +1,36 @@
+#include "tcpipCommon.h"
+
+void tcpip::determineErrorStrings(Protocol protocol, ErrorSources errorSrc, std::string &protStr,
+        std::string &srcString) {
+    if(protocol == Protocol::TCP) {
+        protStr = "TCP";
+    }
+    else if(protocol == Protocol::UDP) {
+        protStr = "UDP";
+    }
+    else {
+        protStr = "Unknown protocol";
+    }
+
+    if(errorSrc == ErrorSources::SETSOCKOPT_CALL) {
+        srcString = "setsockopt call";
+    }
+    else if(errorSrc == ErrorSources::SOCKET_CALL) {
+        srcString = "socket call";
+    }
+    else if(errorSrc == ErrorSources::LISTEN_CALL) {
+        srcString = "listen call";
+    }
+    else if(errorSrc == ErrorSources::ACCEPT_CALL) {
+        srcString = "accept call";
+    }
+    else if(errorSrc == ErrorSources::RECVFROM_CALL) {
+        srcString = "recvfrom call";
+    }
+    else if(errorSrc == ErrorSources::GETADDRINFO_CALL) {
+        srcString = "getaddrinfo call";
+    }
+    else {
+        srcString = "unknown call";
+    }
+}

osal/common/tcpipCommon.h

@@ -0,0 +1,36 @@
+#ifndef FSFW_OSAL_COMMON_TCPIPCOMMON_H_
+#define FSFW_OSAL_COMMON_TCPIPCOMMON_H_
+
+#include "../../timemanager/clockDefinitions.h"
+#include <string>
+
+namespace tcpip {
+
+const char* const DEFAULT_UDP_SERVER_PORT = "7301";
+const char* const DEFAULT_TCP_SERVER_PORT = "7303";
+
+enum class Protocol {
+    UDP,
+    TCP
+};
+
+enum class ErrorSources {
+    GETADDRINFO_CALL,
+    SOCKET_CALL,
+    SETSOCKOPT_CALL,
+    BIND_CALL,
+    RECV_CALL,
+    RECVFROM_CALL,
+    LISTEN_CALL,
+    ACCEPT_CALL,
+    SENDTO_CALL
+};
+
+void determineErrorStrings(Protocol protocol, ErrorSources errorSrc, std::string& protStr,
+        std::string& srcString);
+
+}
+
+
+
+#endif /* FSFW_OSAL_COMMON_TCPIPCOMMON_H_ */

osal/host/MutexFactory.cpp

@@ -24,5 +24,7 @@ MutexIF* MutexFactory::createMutex() {
 }
 
 void MutexFactory::deleteMutex(MutexIF* mutex) {
+    if(mutex != nullptr) {
         delete mutex;
     }
+}

osal/linux/CMakeLists.txt

@@ -16,6 +16,7 @@ target_sources(${LIB_FSFW_NAME}
 		TcUnixUdpPollingTask.cpp
 		TmTcUnixUdpBridge.cpp
 		Timer.cpp
+		tcpipHelpers.cpp
 )
 
 find_package(Threads REQUIRED)

osal/linux/TcUnixUdpPollingTask.cpp

@@ -1,7 +1,9 @@
 #include "TcUnixUdpPollingTask.h"
+#include "tcpipHelpers.h"
+
 #include "../../globalfunctions/arrayprinter.h"
 
-#include <errno.h>
+#define FSFW_UDP_RCV_WIRETAPPING_ENABLED    0
 
 TcUnixUdpPollingTask::TcUnixUdpPollingTask(object_id_t objectId,
 		object_id_t tmtcUnixUdpBridge, size_t frameSize,
@@ -15,8 +17,8 @@ TcUnixUdpPollingTask::TcUnixUdpPollingTask(object_id_t objectId,
 		this->frameSize = DEFAULT_MAX_FRAME_SIZE;
 	}
 
-	// Set up reception buffer with specified frame size.
+	/* Set up reception buffer with specified frame size.
-	// For now, it is assumed that only one frame is held in the buffer!
+	For now, it is assumed that only one frame is held in the buffer! */
 	receptionBuffer.reserve(this->frameSize);
 	receptionBuffer.resize(this->frameSize);
 
@@ -31,34 +33,37 @@ TcUnixUdpPollingTask::TcUnixUdpPollingTask(object_id_t objectId,
 TcUnixUdpPollingTask::~TcUnixUdpPollingTask() {}
 
 ReturnValue_t TcUnixUdpPollingTask::performOperation(uint8_t opCode) {
-	// Poll for new UDP datagrams in permanent loop.
+    /* Sender Address is cached here. */
-	while(1) {
-		//! Sender Address is cached here.
     struct sockaddr_in senderAddress;
-		socklen_t senderSockLen = sizeof(senderAddress);
+    socklen_t senderAddressSize = sizeof(senderAddress);
-		ssize_t bytesReceived = recvfrom(serverUdpSocket,
-				receptionBuffer.data(), frameSize, receptionFlags,
-				reinterpret_cast<sockaddr*>(&senderAddress), &senderSockLen);
-		if(bytesReceived < 0) {
-			// handle error
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-			sif::error << "TcSocketPollingTask::performOperation: Reception"
-					"error." << std::endl;
-#endif
-			handleReadError();
 
+	/* Poll for new UDP datagrams in permanent loop. */
+	while(true) {
+		ssize_t bytesReceived = recvfrom(
+		        serverUdpSocket,
+				receptionBuffer.data(),
+				frameSize,
+				receptionFlags,
+				reinterpret_cast<sockaddr*>(&senderAddress),
+				&senderAddressSize
+		);
+		if(bytesReceived < 0) {
+			/* Handle error */
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+			sif::error << "TcSocketPollingTask::performOperation: Reception error." << std::endl;
+#endif
+			tcpip::handleError(tcpip::Protocol::UDP, tcpip::ErrorSources::RECVFROM_CALL, 500);
 			continue;
 		}
-#if FSFW_CPP_OSTREAM_ENABLED == 1
+#if FSFW_CPP_OSTREAM_ENABLED == 1 && FSFW_UDP_RCV_WIRETAPPING_ENABLED == 1
-//		sif::debug << "TcSocketPollingTask::performOperation: " << bytesReceived
+		sif::debug << "TcSocketPollingTask::performOperation: " << bytesReceived
-//				<< " bytes received" << std::endl;
+		        << " bytes received" << std::endl;
 #endif
 
 		ReturnValue_t result = handleSuccessfullTcRead(bytesReceived);
 		if(result != HasReturnvaluesIF::RETURN_FAILED) {
 
 		}
-		tmtcBridge->registerCommConnect();
 		tmtcBridge->checkAndSetClientAddress(senderAddress);
 	}
 	return HasReturnvaluesIF::RETURN_OK;
@@ -67,15 +72,21 @@ ReturnValue_t TcUnixUdpPollingTask::performOperation(uint8_t opCode) {
 
 ReturnValue_t TcUnixUdpPollingTask::handleSuccessfullTcRead(size_t bytesRead) {
 	store_address_t storeId;
-	ReturnValue_t result = tcStore->addData(&storeId,
+
-			receptionBuffer.data(), bytesRead);
+#if FSFW_UDP_RCV_WIRETAPPING_ENABLED == 1
-	// arrayprinter::print(receptionBuffer.data(), bytesRead);
+    arrayprinter::print(receptionBuffer.data(), bytesRead);
+#endif
+
+    ReturnValue_t result = tcStore->addData(&storeId, receptionBuffer.data(), bytesRead);
 	if (result != HasReturnvaluesIF::RETURN_OK) {
+#if FSFW_VERBOSE_LEVEL >= 1
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TcSerialPollingTask::transferPusToSoftwareBus: Data "
+		sif::error << "TcUnixUdpPollingTask::handleSuccessfullTcRead: Data "
 				"storage failed" << std::endl;
 		sif::error << "Packet size: " << bytesRead << std::endl;
-#endif
+#else
+#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+#endif /* FSFW_VERBOSE_LEVEL >= 1 */
 		return HasReturnvaluesIF::RETURN_FAILED;
 	}
 
@@ -83,10 +94,13 @@ ReturnValue_t TcUnixUdpPollingTask::handleSuccessfullTcRead(size_t bytesRead) {
 
 	result  = MessageQueueSenderIF::sendMessage(targetTcDestination, &message);
 	if (result != HasReturnvaluesIF::RETURN_OK) {
+#if FSFW_VERBOSE_LEVEL >= 1
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "Serial Polling: Sending message to queue failed"
+		sif::error << "TcUnixUdpPollingTask::handleSuccessfullTcRead: Sending message to queue "
-				<< std::endl;
+		        "failed" << std::endl;
-#endif
+#else
+#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+#endif /* FSFW_VERBOSE_LEVEL >= 1 */
 		tcStore->deleteData(storeId);
 	}
 	return result;
@@ -111,15 +125,16 @@ ReturnValue_t TcUnixUdpPollingTask::initialize() {
 		return ObjectManagerIF::CHILD_INIT_FAILED;
 	}
 
-	serverUdpSocket = tmtcBridge->serverSocket;
-
 	return HasReturnvaluesIF::RETURN_OK;
 }
 
 ReturnValue_t TcUnixUdpPollingTask::initializeAfterTaskCreation() {
-	// Initialize the destination after task creation. This ensures
+    /* Initialize the destination after task creation. This ensures
-	// that the destination will be set in the TMTC bridge.
+    that the destination has already been set in the TMTC bridge. */
 	targetTcDestination = tmtcBridge->getRequestQueue();
+    /* The server socket is set up in the bridge intialization. Calling this function here
+    ensures that it is set up properly in any case*/
+    serverUdpSocket = tmtcBridge->serverSocket;
 	return HasReturnvaluesIF::RETURN_OK;
 }
 
@@ -135,24 +150,3 @@ void TcUnixUdpPollingTask::setTimeout(double timeoutSeconds) {
 #endif
 	}
 }
-
-// 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.
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TcUnixUdpPollingTask::handleReadError: Timeout."
-				<< std::endl;
-#endif
-		break;
-	}
-	default: {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TcUnixUdpPollingTask::handleReadError: "
-				<< strerror(errno) << std::endl;
-#endif
-	}
-	}
-}

osal/linux/TcUnixUdpPollingTask.h

@@ -48,6 +48,7 @@ private:
 	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;
 
@@ -61,7 +62,6 @@ private:
 	timeval receptionTimeout;
 
 	ReturnValue_t handleSuccessfullTcRead(size_t bytesRead);
-	void handleReadError();
 };
 
 #endif /* FRAMEWORK_OSAL_LINUX_TCSOCKETPOLLINGTASK_H_ */

osal/linux/TmTcUnixUdpBridge.cpp

@@ -1,203 +1,166 @@
 #include "TmTcUnixUdpBridge.h"
+#include "tcpipHelpers.h"
 #include "../../serviceinterface/ServiceInterface.h"
 #include "../../ipc/MutexGuard.h"
 
-#include <errno.h>
 #include <arpa/inet.h>
+#include <unistd.h>
+#include <netdb.h>
 
+#include <cstring>
 
-TmTcUnixUdpBridge::TmTcUnixUdpBridge(object_id_t objectId,
+//! Debugging preprocessor define.
-		object_id_t tcDestination, object_id_t tmStoreId, object_id_t tcStoreId,
+#define FSFW_UDP_SEND_WIRETAPPING_ENABLED   0
-		uint16_t serverPort, uint16_t clientPort):
+
+const std::string TmTcUnixUdpBridge::DEFAULT_UDP_SERVER_PORT =  tcpip::DEFAULT_UDP_SERVER_PORT;
+
+TmTcUnixUdpBridge::TmTcUnixUdpBridge(object_id_t objectId, object_id_t tcDestination,
+        object_id_t tmStoreId, object_id_t tcStoreId, std::string udpServerPort):
 		TmTcBridge(objectId, tcDestination, tmStoreId, tcStoreId) {
+    if(udpServerPort == "") {
+        this->udpServerPort = DEFAULT_UDP_SERVER_PORT;
+    }
+    else {
+        this->udpServerPort = udpServerPort;
+    }
+
     mutex = MutexFactory::instance()->createMutex();
-
+    communicationLinkUp = false;
-	uint16_t setServerPort = DEFAULT_UDP_SERVER_PORT;
-	if(serverPort != 0xFFFF) {
-		setServerPort = serverPort;
 }
 
-	uint16_t setClientPort = DEFAULT_UDP_CLIENT_PORT;
+ReturnValue_t TmTcUnixUdpBridge::initialize() {
-	if(clientPort != 0xFFFF) {
+    using namespace tcpip;
-		setClientPort = clientPort;
-	}
 
-	// Set up UDP socket: https://man7.org/linux/man-pages/man7/ip.7.html
+    ReturnValue_t result = TmTcBridge::initialize();
-	//clientSocket = socket(AF_INET, SOCK_DGRAM, 0);
+    if(result != HasReturnvaluesIF::RETURN_OK) {
-	serverSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
-	if(serverSocket < 0) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TmTcUnixUdpBridge::TmTcUnixUdpBridge: Could not open"
+        sif::error << "TmTcUnixUdpBridge::initialize: TmTcBridge initialization failed!"
-				" UDP socket!" << std::endl;
-#endif
-		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) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TmTcUnixUdpBridge::TmTcUnixUdpBridge: Could not bind "
-				"local port " << setServerPort << " to server socket!"
                 << std::endl;
 #endif
-		handleBindError();
+        return result;
-		return;
     }
+
+    struct addrinfo *addrResult = nullptr;
+    struct addrinfo hints;
+
+    std::memset(&hints, 0, sizeof(hints));
+    hints.ai_family = AF_INET;
+    hints.ai_socktype = SOCK_DGRAM;
+    hints.ai_protocol = IPPROTO_UDP;
+    hints.ai_flags = AI_PASSIVE;
+
+    /* Set up UDP socket:
+    https://man7.org/linux/man-pages/man3/getaddrinfo.3.html
+    Passing nullptr as the first parameter and specifying AI_PASSIVE in hints will cause
+    getaddrinfo to assign the address 0.0.0.0 (any address) */
+    int retval = getaddrinfo(nullptr, udpServerPort.c_str(), &hints, &addrResult);
+    if (retval != 0) {
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+        sif::warning << "TmTcWinUdpBridge::TmTcWinUdpBridge: Retrieving address info failed!" <<
+                std::endl;
+#endif
+        return HasReturnvaluesIF::RETURN_FAILED;
+    }
+
+    /* Set up UDP socket: https://man7.org/linux/man-pages/man7/ip.7.html */
+    serverSocket = socket(addrResult->ai_family, addrResult->ai_socktype, addrResult->ai_protocol);
+    if(serverSocket < 0) {
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+        sif::error << "TmTcUnixUdpBridge::TmTcUnixUdpBridge: Could not open UDP socket!" <<
+                std::endl;
+#else
+        sif::printError("TmTcUnixUdpBridge::TmTcUnixUdpBridge: Could not open UDP socket!\n");
+#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+        freeaddrinfo(addrResult);
+        handleError(Protocol::UDP, ErrorSources::SOCKET_CALL);
+        return HasReturnvaluesIF::RETURN_FAILED;
+    }
+
+    retval = bind(serverSocket, addrResult->ai_addr, static_cast<int>(addrResult->ai_addrlen));
+    if(retval != 0) {
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+        sif::warning << "TmTcWinUdpBridge::TmTcWinUdpBridge: Could not bind "
+                "local port (" << udpServerPort << ") to server socket!" << std::endl;
+#endif
+        freeaddrinfo(addrResult);
+        handleError(Protocol::UDP, ErrorSources::BIND_CALL);
+        return HasReturnvaluesIF::RETURN_FAILED;
+    }
+
+    return HasReturnvaluesIF::RETURN_OK;
 }
 
 TmTcUnixUdpBridge::~TmTcUnixUdpBridge() {
+    if(mutex != nullptr) {
+        MutexFactory::instance()->deleteMutex(mutex);
+    }
+    close(serverSocket);
 }
 
 ReturnValue_t TmTcUnixUdpBridge::sendTm(const uint8_t *data, size_t dataLen) {
     int flags = 0;
 
-	MutexGuard lock(mutex, MutexIF::TimeoutType::WAITING, 10);
+    /* The target address can be set by different threads so this lock ensures thread-safety */
+    MutexGuard lock(mutex, timeoutType, mutexTimeoutMs);
 
     if(ipAddrAnySet){
         clientAddress.sin_addr.s_addr = htons(INADDR_ANY);
-		//clientAddress.sin_addr.s_addr = inet_addr("127.73.73.1");
+        clientAddressLen = sizeof(clientAddress);
-		clientAddressLen = sizeof(serverAddress);
     }
 
-//	char ipAddress [15];
+#if FSFW_CPP_OSTREAM_ENABLED == 1 && FSFW_UDP_SEND_WIRETAPPING_ENABLED == 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
+    char ipAddress [15];
-//	sif::debug << "IP Address Sender: "<< inet_ntop(AF_INET,
+    sif::debug << "IP Address Sender: "<<
-//					&clientAddress.sin_addr.s_addr, ipAddress, 15) << std::endl;
+            inet_ntop(AF_INET,&clientAddress.sin_addr.s_addr, ipAddress, 15) << std::endl;
 #endif
 
-	ssize_t bytesSent = sendto(serverSocket, data, dataLen, flags,
+    ssize_t bytesSent = sendto(
-			reinterpret_cast<sockaddr*>(&clientAddress), clientAddressLen);
+            serverSocket,
+            data,
+            dataLen,
+            flags,
+            reinterpret_cast<sockaddr*>(&clientAddress),
+            clientAddressLen
+    );
     if(bytesSent < 0) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TmTcUnixUdpBridge::sendTm: Send operation failed."
+        sif::warning << "TmTcUnixUdpBridge::sendTm: Send operation failed." << std::endl;
-				<< std::endl;
 #endif
-		handleSendError();
+        tcpip::handleError(tcpip::Protocol::UDP, tcpip::ErrorSources::SENDTO_CALL);
     }
-#if FSFW_CPP_OSTREAM_ENABLED == 1
+
-//	sif::debug << "TmTcUnixUdpBridge::sendTm: " << bytesSent << " bytes were"
+#if FSFW_CPP_OSTREAM_ENABLED == 1 && FSFW_UDP_SEND_WIRETAPPING_ENABLED == 1
-//			" sent." << std::endl;
+    sif::debug << "TmTcUnixUdpBridge::sendTm: " << bytesSent << " bytes were"
+            " sent." << std::endl;
 #endif
+
     return HasReturnvaluesIF::RETURN_OK;
 }
 
 void TmTcUnixUdpBridge::checkAndSetClientAddress(sockaddr_in& newAddress) {
-	MutexGuard lock(mutex, MutexIF::TimeoutType::WAITING, 10);
+    /* The target address can be set by different threads so this lock ensures thread-safety */
+    MutexGuard lock(mutex, timeoutType, mutexTimeoutMs);
 
-//	char ipAddress [15];
+#if FSFW_CPP_OSTREAM_ENABLED == 1 && FSFW_UDP_RCV_WIRETAPPING_ENABLED == 1
-#if FSFW_CPP_OSTREAM_ENABLED == 1
+    char ipAddress [15];
-//	sif::debug << "IP Address Sender: "<< inet_ntop(AF_INET,
+    sif::debug << "IP Address Sender: "<< inet_ntop(AF_INET,
-//			&newAddress.sin_addr.s_addr, ipAddress, 15) << std::endl;
+            &newAddress.sin_addr.s_addr, ipAddress, 15) << std::endl;
-//	sif::debug << "IP Address Old: " <<  inet_ntop(AF_INET,
+    sif::debug << "IP Address Old: " <<  inet_ntop(AF_INET,
-//			&clientAddress.sin_addr.s_addr, ipAddress, 15) << std::endl;
+            &clientAddress.sin_addr.s_addr, ipAddress, 15) << std::endl;
 #endif
+    registerCommConnect();
 
-	// Set new IP address if it has changed.
+    /* 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;
+        clientAddress = newAddress;
         clientAddressLen = sizeof(clientAddress);
     }
 }
 
-
+void TmTcUnixUdpBridge::setMutexProperties(MutexIF::TimeoutType timeoutType,
-void TmTcUnixUdpBridge::handleSocketError() {
+        dur_millis_t timeoutMs) {
-	// See: https://man7.org/linux/man-pages/man2/socket.2.html
+    this->timeoutType = timeoutType;
-	switch(errno) {
+    this->mutexTimeoutMs = timeoutMs;
-	case(EACCES):
-	case(EINVAL):
-	case(EMFILE):
-	case(ENFILE):
-	case(EAFNOSUPPORT):
-	case(ENOBUFS):
-	case(ENOMEM):
-	case(EPROTONOSUPPORT):
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TmTcUnixBridge::handleSocketError: Socket creation failed"
-				<< " with " << strerror(errno) << std::endl;
-#endif
-		break;
-	default:
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TmTcUnixBridge::handleSocketError: Unknown error"
-				<< std::endl;
-#endif
-		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
-		 */
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-		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;
-#endif
-	}
-	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): {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TmTcUnixBridge::handleBindError: Socket creation failed"
-				<< " with " << strerror(errno) << std::endl;
-#endif
-		break;
-	}
-	default:
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TmTcUnixBridge::handleBindError: Unknown error"
-				<< std::endl;
-#endif
-		break;
-	}
-}
-
-void TmTcUnixUdpBridge::handleSendError() {
-	switch(errno) {
-	default: {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TmTcUnixBridge::handleSendError: "
-		        << strerror(errno) << std::endl;
-#else
-		sif::printError("TmTcUnixBridge::handleSendError: %s\n",
-				strerror(errno));
-#endif
-	}
-	}
 }
 
 void TmTcUnixUdpBridge::setClientAddressToAny(bool ipAddrAnySet){

osal/linux/TmTcUnixUdpBridge.h

@@ -7,45 +7,47 @@
 #include <netinet/in.h>
 #include <netinet/udp.h>
 
-class TmTcUnixUdpBridge: public TmTcBridge {
+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
+    /* The ports chosen here should not be used by any other process.
-	static constexpr uint16_t DEFAULT_UDP_SERVER_PORT = 7301;
+	List of used ports on Linux: /etc/services */
-	static constexpr uint16_t DEFAULT_UDP_CLIENT_PORT = 7302;
+    static const std::string DEFAULT_UDP_SERVER_PORT;
 
     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);
+            std::string serverPort = "");
     virtual~ TmTcUnixUdpBridge();
 
+    /**
+     * Set properties of internal mutex.
+     */
+    void setMutexProperties(MutexIF::TimeoutType timeoutType, dur_millis_t timeoutMs);
+
+    ReturnValue_t initialize() override;
+
     void checkAndSetClientAddress(sockaddr_in& clientAddress);
 
     void setClientAddressToAny(bool ipAddrAnySet);
+
 protected:
     virtual ReturnValue_t sendTm(const uint8_t * data, size_t dataLen) override;
 
 private:
     int serverSocket = 0;
-
+    std::string udpServerPort;
-	const int serverSocketOptions = 0;
 
     struct sockaddr_in clientAddress;
     socklen_t clientAddressLen = 0;
 
-	struct sockaddr_in serverAddress;
-	socklen_t serverAddressLen = 0;
-
     bool ipAddrAnySet = false;
 
-	//! Access to the client address is mutex protected as it is set
+    //! Access to the client address is mutex protected as it is set by another task.
-	//! by another task.
+    MutexIF::TimeoutType timeoutType = MutexIF::TimeoutType::WAITING;
+    dur_millis_t mutexTimeoutMs = 20;
     MutexIF* mutex;
-
-	void handleSocketError();
-	void handleBindError();
-	void handleSendError();
 };
 
 #endif /* FRAMEWORK_OSAL_LINUX_TMTCUNIXUDPBRIDGE_H_ */

osal/linux/tcpipHelpers.cpp

@@ -0,0 +1,108 @@
+#include "tcpipHelpers.h"
+
+#include "../../tasks/TaskFactory.h"
+
+#include <errno.h>
+#include <string>
+
+void tcpip::handleError(Protocol protocol, ErrorSources errorSrc, dur_millis_t sleepDuration) {
+    int errCode = errno;
+    std::string protocolString;
+    std::string errorSrcString;
+    determineErrorStrings(protocol, errorSrc, protocolString, errorSrcString);
+    std::string infoString;
+    switch(errCode) {
+    case(EACCES): {
+        infoString = "EACCES";
+        break;
+    }
+    case(EINVAL): {
+        infoString = "EINVAL";
+        break;
+    }
+    case(EAGAIN): {
+        infoString = "EAGAIN";
+        break;
+    }
+    case(EMFILE): {
+        infoString = "EMFILE";
+        break;
+    }
+    case(ENFILE): {
+        infoString = "ENFILE";
+        break;
+    }
+    case(EAFNOSUPPORT): {
+        infoString = "EAFNOSUPPORT";
+        break;
+    }
+    case(ENOBUFS): {
+        infoString = "ENOBUFS";
+        break;
+    }
+    case(ENOMEM): {
+        infoString = "ENOMEM";
+        break;
+    }
+    case(EPROTONOSUPPORT): {
+        infoString = "EPROTONOSUPPORT";
+        break;
+    }
+    case(EADDRINUSE): {
+        infoString = "EADDRINUSE";
+        break;
+    }
+    case(EBADF): {
+        infoString = "EBADF";
+        break;
+    }
+    case(ENOTSOCK): {
+        infoString = "ENOTSOCK";
+        break;
+    }
+    case(EADDRNOTAVAIL): {
+        infoString = "EADDRNOTAVAIL";
+        break;
+    }
+    case(EFAULT): {
+        infoString = "EFAULT";
+        break;
+    }
+    case(ELOOP): {
+        infoString = "ELOOP";
+        break;
+    }
+    case(ENAMETOOLONG): {
+        infoString = "ENAMETOOLONG";
+        break;
+    }
+    case(ENOENT): {
+        infoString = "ENOENT";
+        break;
+    }
+    case(ENOTDIR): {
+        infoString = "ENOTDIR";
+        break;
+    }
+    case(EROFS):  {
+        infoString = "EROFS";
+        break;
+    }
+
+    default: {
+        infoString = "Error code: " + std::to_string(errCode);
+    }
+    }
+
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+    sif::warning << "tcpip::handleError: " << protocolString << " | " << errorSrcString <<
+            " | " << infoString << std::endl;
+#else
+    sif::printWarning("tcpip::handleError: %s | %s | %s\n", protocolString,
+            errorSrcString, infoString);
+#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+
+    if(sleepDuration > 0) {
+        TaskFactory::instance()->delayTask(sleepDuration);
+    }
+}

osal/linux/tcpipHelpers.h

@@ -0,0 +1,14 @@
+#ifndef FSFW_OSAL_LINUX_TCPIPHELPERS_H_
+#define FSFW_OSAL_LINUX_TCPIPHELPERS_H_
+
+#include "../../timemanager/clockDefinitions.h"
+#include "../common/tcpipCommon.h"
+
+namespace tcpip {
+
+
+void handleError(Protocol protocol, ErrorSources errorSrc, dur_millis_t sleepDuration = 0);
+
+}
+
+#endif /* FSFW_OSAL_LINUX_TCPIPHELPERS_H_ */

osal/windows/CMakeLists.txt

@@ -1,6 +1,8 @@
 target_sources(${LIB_FSFW_NAME} PRIVATE 
     TcWinUdpPollingTask.cpp
     TmTcWinUdpBridge.cpp
+    TcWinTcpServer.cpp
+    tcpipHelpers.cpp
 )
 
 target_link_libraries(${LIB_FSFW_NAME} PRIVATE

osal/windows/TcWinTcpServer.cpp

@@ -0,0 +1,129 @@
+#include "TcWinTcpServer.h"
+#include "tcpipHelpers.h"
+#include "../../serviceinterface/ServiceInterface.h"
+
+#include <winsock2.h>
+#include <ws2tcpip.h>
+
+const std::string TcWinTcpServer::DEFAULT_TCP_SERVER_PORT =  "7301";
+const std::string TcWinTcpServer::DEFAULT_TCP_CLIENT_PORT =  "7302";
+
+TcWinTcpServer::TcWinTcpServer(object_id_t objectId, object_id_t tmtcUnixUdpBridge,
+        std::string customTcpServerPort):
+        SystemObject(objectId), tcpPort(customTcpServerPort) {
+    if(tcpPort == "") {
+        tcpPort = DEFAULT_TCP_SERVER_PORT;
+    }
+}
+
+ReturnValue_t TcWinTcpServer::initialize() {
+    using namespace tcpip;
+    int retval = 0;
+    struct addrinfo *addrResult = nullptr;
+    struct addrinfo hints;
+    /* Initiates Winsock DLL. */
+    WSAData wsaData;
+    WORD wVersionRequested = MAKEWORD(2, 2);
+    int err = WSAStartup(wVersionRequested, &wsaData);
+    if (err != 0) {
+        /* Tell the user that we could not find a usable Winsock DLL. */
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+        sif::error << "TmTcWinUdpBridge::TmTcWinUdpBridge: WSAStartup failed with error: " <<
+                err << std::endl;
+#endif
+        return HasReturnvaluesIF::RETURN_FAILED;
+    }
+
+    ZeroMemory(&hints, sizeof (hints));
+    hints.ai_family = AF_INET;
+    hints.ai_socktype = SOCK_STREAM;
+    hints.ai_protocol = IPPROTO_TCP;
+    hints.ai_flags = AI_PASSIVE;
+
+    retval = getaddrinfo(nullptr, tcpPort.c_str(), &hints, &addrResult);
+    if (retval != 0) {
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+        sif::warning << "TcWinTcpServer::TcWinTcpServer: Retrieving address info failed!" <<
+                std::endl;
+#endif
+        handleError(Protocol::TCP, ErrorSources::GETADDRINFO_CALL);
+        return HasReturnvaluesIF::RETURN_FAILED;
+    }
+
+    /* Open TCP (stream) socket */
+    listenerTcpSocket = socket(addrResult->ai_family, addrResult->ai_socktype,
+            addrResult->ai_protocol);
+    if(listenerTcpSocket == INVALID_SOCKET) {
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+        sif::warning << "TcWinTcpServer::TcWinTcpServer: Socket creation failed!" << std::endl;
+#endif
+        freeaddrinfo(addrResult);
+        handleError(Protocol::TCP, ErrorSources::SOCKET_CALL);
+        return HasReturnvaluesIF::RETURN_FAILED;
+    }
+
+    retval = bind(listenerTcpSocket, addrResult->ai_addr, static_cast<int>(addrResult->ai_addrlen));
+    if(retval == SOCKET_ERROR) {
+        sif::warning << "TcWinTcpServer::TcWinTcpServer: Binding socket failed!" <<
+                std::endl;
+        freeaddrinfo(addrResult);
+        handleError(Protocol::TCP, ErrorSources::BIND_CALL);
+    }
+
+    freeaddrinfo(addrResult);
+    return HasReturnvaluesIF::RETURN_OK;
+}
+
+
+TcWinTcpServer::~TcWinTcpServer() {
+    closesocket(listenerTcpSocket);
+    WSACleanup();
+}
+
+ReturnValue_t TcWinTcpServer::performOperation(uint8_t opCode) {
+    using namespace tcpip;
+    /* If a connection is accepted, the corresponding socket will be assigned to the new socket */
+    SOCKET clientSocket;
+    sockaddr_in clientSockAddr;
+    int connectorSockAddrLen = 0;
+    int retval = 0;
+
+    /* Listen for connection requests permanently for lifetime of program */
+    while(true) {
+        retval = listen(listenerTcpSocket, currentBacklog);
+        if(retval == SOCKET_ERROR) {
+            handleError(Protocol::TCP, ErrorSources::LISTEN_CALL, 500);
+            continue;
+        }
+
+        clientSocket = accept(listenerTcpSocket, reinterpret_cast<sockaddr*>(&clientSockAddr),
+                &connectorSockAddrLen);
+
+        if(clientSocket == INVALID_SOCKET) {
+            handleError(Protocol::TCP, ErrorSources::ACCEPT_CALL, 500);
+            continue;
+        };
+
+        retval = recv(clientSocket, reinterpret_cast<char*>(receptionBuffer.data()),
+                receptionBuffer.size(), 0);
+        if(retval > 0) {
+#if FSFW_TCP_RCV_WIRETAPPING_ENABLED == 1
+            sif::info << "TcWinTcpServer::performOperation: Received " << retval << " bytes."
+                    std::endl;
+#endif
+            handleError(Protocol::TCP, ErrorSources::RECV_CALL, 500);
+        }
+        else if(retval == 0) {
+
+        }
+        else {
+
+        }
+
+        /* Done, shut down connection */
+        retval = shutdown(clientSocket, SD_SEND);
+    }
+    return HasReturnvaluesIF::RETURN_OK;
+}
+
+

osal/windows/TcWinTcpServer.h

@@ -0,0 +1,47 @@
+#ifndef FSFW_OSAL_WINDOWS_TCWINTCPSERVER_H_
+#define FSFW_OSAL_WINDOWS_TCWINTCPSERVER_H_
+
+#include "../../objectmanager/SystemObject.h"
+#include "../../tasks/ExecutableObjectIF.h"
+
+#include <string>
+#include <vector>
+
+//! Debugging preprocessor define.
+#define FSFW_TCP_RCV_WIRETAPPING_ENABLED    0
+
+/**
+ * @brief   Windows TCP server used to receive telecommands on a Windows Host
+ * @details
+ * Based on: https://docs.microsoft.com/en-us/windows/win32/winsock/complete-server-code
+ */
+class TcWinTcpServer:
+        public SystemObject,
+        public ExecutableObjectIF {
+public:
+    /* The ports chosen here should not be used by any other process. */
+    static const std::string DEFAULT_TCP_SERVER_PORT;
+    static const std::string DEFAULT_TCP_CLIENT_PORT;
+
+    TcWinTcpServer(object_id_t objectId, object_id_t tmtcUnixUdpBridge,
+            std::string customTcpServerPort = "");
+    virtual~ TcWinTcpServer();
+
+    ReturnValue_t initialize() override;
+    ReturnValue_t performOperation(uint8_t opCode) override;
+
+private:
+
+    std::string tcpPort;
+    SOCKET listenerTcpSocket = 0;
+    struct sockaddr_in tcpAddress;
+    int tcpAddrLen = sizeof(tcpAddress);
+    int currentBacklog = 3;
+
+    std::vector<uint8_t> receptionBuffer;
+    int tcpSockOpt = 0;
+
+
+};
+
+#endif /* FSFW_OSAL_WINDOWS_TCWINTCPSERVER_H_ */

osal/windows/TcWinUdpPollingTask.cpp

@@ -1,4 +1,5 @@
 #include "TcWinUdpPollingTask.h"
+#include "tcpipHelpers.h"
 #include "../../globalfunctions/arrayprinter.h"
 #include "../../serviceinterface/ServiceInterfaceStream.h"
 
@@ -31,25 +32,29 @@ TcWinUdpPollingTask::TcWinUdpPollingTask(object_id_t objectId,
 TcWinUdpPollingTask::~TcWinUdpPollingTask() {}
 
 ReturnValue_t TcWinUdpPollingTask::performOperation(uint8_t opCode) {
-	/* Poll for new UDP datagrams in permanent loop. */
+    /* Sender Address is cached here. */
-	while(true) {
-		//! Sender Address is cached here.
     struct sockaddr_in senderAddress;
     int senderAddressSize = sizeof(senderAddress);
-		int bytesReceived = recvfrom(serverUdpSocket,
+
-				reinterpret_cast<char*>(receptionBuffer.data()), frameSize,
+	/* Poll for new UDP datagrams in permanent loop. */
-				receptionFlags, reinterpret_cast<sockaddr*>(&senderAddress),
+	while(true) {
-				&senderAddressSize);
+		int bytesReceived = recvfrom(
+		        serverUdpSocket,
+		        reinterpret_cast<char*>(receptionBuffer.data()),
+		        frameSize,
+				receptionFlags,
+				reinterpret_cast<sockaddr*>(&senderAddress),
+				&senderAddressSize
+		);
 		if(bytesReceived == SOCKET_ERROR) {
 			/* Handle error */
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-			sif::error << "TcWinUdpPollingTask::performOperation: Reception"
+			sif::error << "TcWinUdpPollingTask::performOperation: Reception error." << std::endl;
-					" error." << std::endl;
 #endif
-			handleReadError();
+			tcpip::handleError(tcpip::Protocol::UDP, tcpip::ErrorSources::RECVFROM_CALL, 1000);
 			continue;
 		}
-#if FSFW_CPP_OSTREAM_ENABLED == 1 && FSFW_UDP_WIRETAPPING_ENABLED == 1
+#if FSFW_CPP_OSTREAM_ENABLED == 1 && FSFW_UDP_RCV_WIRETAPPING_ENABLED == 1
 		sif::debug << "TcWinUdpPollingTask::performOperation: " << bytesReceived <<
 		        " bytes received" << std::endl;
 #endif
@@ -58,7 +63,6 @@ ReturnValue_t TcWinUdpPollingTask::performOperation(uint8_t opCode) {
 		if(result != HasReturnvaluesIF::RETURN_FAILED) {
 
 		}
-		tmtcBridge->registerCommConnect();
 		tmtcBridge->checkAndSetClientAddress(senderAddress);
 	}
 	return HasReturnvaluesIF::RETURN_OK;
@@ -67,17 +71,20 @@ ReturnValue_t TcWinUdpPollingTask::performOperation(uint8_t opCode) {
 
 ReturnValue_t TcWinUdpPollingTask::handleSuccessfullTcRead(size_t bytesRead) {
 	store_address_t storeId;
-	ReturnValue_t result = tcStore->addData(&storeId,
+
-			receptionBuffer.data(), bytesRead);
+#if FSFW_UDP_RCV_WIRETAPPING_ENABLED == 1
-#if FSFW_UDP_WIRETAPPING_ENABLED == 1
+    arrayprinter::print(receptionBuffer.data(), bytesRead);
-	arrayprinter::print(receptionBuffer.data(), bytesRead);#
 #endif
+
+	ReturnValue_t result = tcStore->addData(&storeId, receptionBuffer.data(), bytesRead);
 	if (result != HasReturnvaluesIF::RETURN_OK) {
+#if FSFW_VERBOSE_LEVEL >= 1
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::warning<< "TcSerialPollingTask::transferPusToSoftwareBus: Data "
+		sif::warning<< "TcWinUdpPollingTask::transferPusToSoftwareBus: Data storage failed." <<
-		        "storage failed" << std::endl;
+		        std::endl;
 		sif::warning << "Packet size: " << bytesRead << std::endl;
-#endif
+#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+#endif /* FSFW_VERBOSE_LEVEL >= 1 */
 		return HasReturnvaluesIF::RETURN_FAILED;
 	}
 
@@ -85,9 +92,12 @@ ReturnValue_t TcWinUdpPollingTask::handleSuccessfullTcRead(size_t bytesRead) {
 
 	result  = MessageQueueSenderIF::sendMessage(targetTcDestination, &message);
 	if (result != HasReturnvaluesIF::RETURN_OK) {
+#if FSFW_VERBOSE_LEVEL >= 1
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::warning << "Serial Polling: Sending message to queue failed" << std::endl;
+		sif::warning << "TcWinUdpPollingTask::handleSuccessfullTcRead: "
-#endif
+		        " Sending message to queue failed" << std::endl;
+#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+#endif /* FSFW_VERBOSE_LEVEL >= 1 */
 		tcStore->deleteData(storeId);
 	}
 	return result;
@@ -97,8 +107,7 @@ ReturnValue_t TcWinUdpPollingTask::initialize() {
 	tcStore = objectManager->get<StorageManagerIF>(objects::TC_STORE);
 	if (tcStore == nullptr) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TcSerialPollingTask::initialize: TC Store uninitialized!"
+		sif::error << "TcWinUdpPollingTask::initialize: TC store uninitialized!" << std::endl;
-				<< std::endl;
 #endif
 		return ObjectManagerIF::CHILD_INIT_FAILED;
 	}
@@ -106,25 +115,21 @@ ReturnValue_t TcWinUdpPollingTask::initialize() {
 	tmtcBridge = objectManager->get<TmTcWinUdpBridge>(tmtcBridgeId);
 	if(tmtcBridge == nullptr) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-		sif::error << "TcSocketPollingTask::TcSocketPollingTask: Invalid"
+		sif::error << "TcWinUdpPollingTask::initialize: Invalid TMTC bridge object!" <<
-				" TMTC bridge object!" << std::endl;
+		        std::endl;
 #endif
 		return ObjectManagerIF::CHILD_INIT_FAILED;
 	}
-
-	serverUdpSocket = tmtcBridge->serverSocket;
-#if FSFW_CPP_OSTREAM_ENABLED == 1 && FSFW_UDP_WIRETAPPING_ENABLED == 1
-	sif::info << "TcWinUdpPollingTask::initialize: Server UDP socket " << serverUdpSocket <<
-	        std::endl;
-#endif
-
 	return HasReturnvaluesIF::RETURN_OK;
 }
 
 ReturnValue_t TcWinUdpPollingTask::initializeAfterTaskCreation() {
-	// Initialize the destination after task creation. This ensures
+	/* Initialize the destination after task creation. This ensures
-	// that the destination has already been set in the TMTC bridge.
+	that the destination has already been set in the TMTC bridge. */
 	targetTcDestination = tmtcBridge->getRequestQueue();
+	/* The server socket is set up in the bridge intialization. Calling this function here
+	ensures that it is set up properly in any case*/
+    serverUdpSocket = tmtcBridge->serverSocket;
 	return HasReturnvaluesIF::RETURN_OK;
 }
 
@@ -139,39 +144,3 @@ void TcWinUdpPollingTask::setTimeout(double timeoutSeconds) {
 #endif
 	}
 }
-
-void TcWinUdpPollingTask::handleReadError() {
-    int error = WSAGetLastError();
-    switch(error) {
-    case(WSANOTINITIALISED): {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::info << "TcWinUdpPollingTask::handleReadError: WSANOTINITIALISED: "
-                << "WSAStartup(...) call " << "necessary" << std::endl;
-#endif
-        break;
-    }
-    case(WSAEFAULT): {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::info << "TcWinUdpPollingTask::handleReadError: WSADEFAULT: "
-                << "Bad address " << std::endl;
-#endif
-        break;
-    }
-    case(WSAEINVAL): {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::info << "TcWinUdpPollingTask::handleReadError: WSAEINVAL: "
-                << "Invalid input parameters. " << std::endl;
-#endif
-        break;
-    }
-    default: {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::info << "TcWinUdpPollingTask::handleReadError: Error code: "
-                << error << std::endl;
-#endif
-        break;
-    }
-    }
-    // to prevent spam.
-    Sleep(1000);
-}

osal/windows/TcWinUdpPollingTask.h

@@ -51,10 +51,12 @@ private:
 	object_id_t tmtcBridgeId = objects::NO_OBJECT;
 	TmTcWinUdpBridge* tmtcBridge = nullptr;
 	MessageQueueId_t targetTcDestination = MessageQueueIF::NO_QUEUE;
-	//! Reception flags: https://linux.die.net/man/2/recvfrom.
+
+	//! See: https://docs.microsoft.com/en-us/windows/win32/api/winsock/nf-winsock-recvfrom
 	int receptionFlags = 0;
 
-	//! Server socket, which is member of TMTC bridge and is assigned in constructor
+	//! Server socket, which is member of TMTC bridge.
+	//! Will be cached shortly after SW intialization.
 	SOCKET serverUdpSocket = 0;
 
 	std::vector<uint8_t> receptionBuffer;
@@ -63,7 +65,6 @@ private:
 	timeval receptionTimeout;
 
 	ReturnValue_t handleSuccessfullTcRead(size_t bytesRead);
-	void handleReadError();
 };
 
 #endif /* FRAMEWORK_OSAL_LINUX_TCSOCKETPOLLINGTASK_H_ */

osal/windows/TmTcWinUdpBridge.cpp

@@ -1,18 +1,38 @@
 #include "TmTcWinUdpBridge.h"
+#include "tcpipHelpers.h"
 
+#include <fsfw/serviceinterface/ServiceInterface.h>
 #include <fsfw/ipc/MutexGuard.h>
+#include <ws2tcpip.h>
 
-#if defined(_MSC_VER)
+//! Debugging preprocessor define.
-#include <BaseTsd.h>
+#define FSFW_UDP_SEND_WIRETAPPING_ENABLED    0
-typedef SSIZE_T ssize_t;
-#endif
 
-TmTcWinUdpBridge::TmTcWinUdpBridge(object_id_t objectId,
+const std::string TmTcWinUdpBridge::DEFAULT_UDP_SERVER_PORT =  tcpip::DEFAULT_UDP_SERVER_PORT;
-        object_id_t tcDestination, object_id_t tmStoreId, object_id_t tcStoreId,
+
-        uint16_t serverPort, uint16_t clientPort):
+TmTcWinUdpBridge::TmTcWinUdpBridge(object_id_t objectId, object_id_t tcDestination,
+        object_id_t tmStoreId, object_id_t tcStoreId, std::string udpServerPort):
         TmTcBridge(objectId, tcDestination, tmStoreId, tcStoreId) {
+    if(udpServerPort == "") {
+        this->udpServerPort = DEFAULT_UDP_SERVER_PORT;
+    }
+    else {
+        this->udpServerPort = udpServerPort;
+    }
+
     mutex = MutexFactory::instance()->createMutex();
     communicationLinkUp = false;
+}
+
+ReturnValue_t TmTcWinUdpBridge::initialize() {
+    ReturnValue_t result = TmTcBridge::initialize();
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+        sif::error << "TmTcWinUdpBridge::initialize: TmTcBridge initialization failed!"
+                << std::endl;
+#endif
+        return result;
+    }
 
     /* Initiates Winsock DLL. */
     WSAData wsaData;
@@ -22,71 +42,65 @@ TmTcWinUdpBridge::TmTcWinUdpBridge(object_id_t objectId,
         /* Tell the user that we could not find a usable */
         /* Winsock DLL.                                  */
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::error << "TmTcWinUdpBridge::TmTcWinUdpBridge:"
+        sif::error << "TmTcWinUdpBridge::TmTcWinUdpBridge: WSAStartup failed with error: " <<
-                "WSAStartup failed with error: " << err << std::endl;
+                err << std::endl;
+#else
+        sif::printError("TmTcWinUdpBridge::TmTcWinUdpBridge: WSAStartup failed with error: %d\n",
+                err);
 #endif
-        return;
+        return HasReturnvaluesIF::RETURN_FAILED;
     }
 
-    uint16_t setServerPort = DEFAULT_UDP_SERVER_PORT;
+    struct addrinfo *addrResult = nullptr;
-    if(serverPort != 0xFFFF) {
+    struct addrinfo hints;
-        setServerPort = serverPort;
-    }
 
-    uint16_t setClientPort = DEFAULT_UDP_CLIENT_PORT;
+    ZeroMemory(&hints, sizeof (hints));
-    if(clientPort != 0xFFFF) {
+    hints.ai_family = AF_INET;
-        setClientPort = clientPort;
+    hints.ai_socktype = SOCK_DGRAM;
-    }
+    hints.ai_protocol = IPPROTO_UDP;
+    hints.ai_flags = AI_PASSIVE;
 
     /* Set up UDP socket:
-    https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-socket
+    https://en.wikipedia.org/wiki/Getaddrinfo
-    */
+    Passing nullptr as the first parameter and specifying AI_PASSIVE in hints will cause
-    serverSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+    getaddrinfo to assign the address 0.0.0.0 (any address) */
+    int retval = getaddrinfo(nullptr, udpServerPort.c_str(), &hints, &addrResult);
+    if (retval != 0) {
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+        sif::warning << "TmTcWinUdpBridge::TmTcWinUdpBridge: Retrieving address info failed!" <<
+                std::endl;
+#endif
+        return HasReturnvaluesIF::RETURN_FAILED;
+    }
+
+    serverSocket = socket(addrResult->ai_family, addrResult->ai_socktype, addrResult->ai_protocol);
     if(serverSocket == INVALID_SOCKET) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
         sif::warning << "TmTcWinUdpBridge::TmTcWinUdpBridge: Could not open UDP socket!" <<
                 std::endl;
 #endif
-        handleSocketError();
+        freeaddrinfo(addrResult);
-        return;
+        tcpip::handleError(tcpip::Protocol::UDP, tcpip::ErrorSources::SOCKET_CALL);
+        return HasReturnvaluesIF::RETURN_FAILED;
     }
 
-    serverAddress.sin_family = AF_INET;
+    retval = bind(serverSocket, addrResult->ai_addr, static_cast<int>(addrResult->ai_addrlen));
-
+    if(retval != 0) {
-    /* Accept packets from any interface. (potentially insecure). */
-    serverAddress.sin_addr.s_addr = htonl(INADDR_ANY);
-    serverAddress.sin_port = htons(setServerPort);
-    serverAddressLen = sizeof(serverAddress);
-    int result = setsockopt(serverSocket, SOL_SOCKET, SO_REUSEADDR,
-            reinterpret_cast<const char*>(&serverSocketOptions),
-            sizeof(serverSocketOptions));
-    if(result != 0) {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::warning << "TmTcWinUdpBridge::TmTcWinUdpBridge: Could not set socket options!" <<
-                std::endl;
-#endif
-        handleSocketError();
-    }
-
-    clientAddress.sin_family = AF_INET;
-    clientAddress.sin_addr.s_addr = htonl(INADDR_ANY);
-    clientAddress.sin_port = htons(setClientPort);
-    clientAddressLen = sizeof(clientAddress);
-
-    result = bind(serverSocket,
-            reinterpret_cast<struct sockaddr*>(&serverAddress),
-            serverAddressLen);
-    if(result != 0) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
         sif::error << "TmTcWinUdpBridge::TmTcWinUdpBridge: Could not bind "
-                "local port " << setServerPort << " to server socket!"
+                "local port (" << udpServerPort << ") to server socket!" << std::endl;
-                << std::endl;
 #endif
-        handleBindError();
+        freeaddrinfo(addrResult);
+        tcpip::handleError(tcpip::Protocol::UDP, tcpip::ErrorSources::BIND_CALL);
     }
+    freeaddrinfo(addrResult);
+    return HasReturnvaluesIF::RETURN_OK;
 }
 
 TmTcWinUdpBridge::~TmTcWinUdpBridge() {
+    if(mutex != nullptr) {
+        MutexFactory::instance()->deleteMutex(mutex);
+    }
     closesocket(serverSocket);
     WSACleanup();
 }
@@ -94,6 +108,9 @@ TmTcWinUdpBridge::~TmTcWinUdpBridge() {
 ReturnValue_t TmTcWinUdpBridge::sendTm(const uint8_t *data, size_t dataLen) {
     int flags = 0;
 
+    /* The target address can be set by different threads so this lock ensures thread-safety */
+    MutexGuard lock(mutex, timeoutType, mutexTimeoutMs);
+
 #if FSFW_CPP_OSTREAM_ENABLED == 1 && FSFW_UDP_SEND_WIRETAPPING_ENABLED == 1
     clientAddress.sin_addr.s_addr = htons(INADDR_ANY);
     clientAddressLen = sizeof(serverAddress);
@@ -102,15 +119,19 @@ ReturnValue_t TmTcWinUdpBridge::sendTm(const uint8_t *data, size_t dataLen) {
             &clientAddress.sin_addr.s_addr, ipAddress, 15) << std::endl;
 #endif
 
-    ssize_t bytesSent = sendto(serverSocket,
+    int bytesSent = sendto(
-            reinterpret_cast<const char*>(data), dataLen, flags,
+            serverSocket,
-            reinterpret_cast<sockaddr*>(&clientAddress), clientAddressLen);
+            reinterpret_cast<const char*>(data),
+            dataLen,
+            flags,
+            reinterpret_cast<sockaddr*>(&clientAddress),
+            clientAddressLen
+    );
     if(bytesSent == SOCKET_ERROR) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::error << "TmTcWinUdpBridge::sendTm: Send operation failed."
+        sif::warning << "TmTcWinUdpBridge::sendTm: Send operation failed." << std::endl;
-                << std::endl;
 #endif
-        handleSendError();
+        tcpip::handleError(tcpip::Protocol::UDP, tcpip::ErrorSources::SENDTO_CALL);
     }
 #if FSFW_CPP_OSTREAM_ENABLED == 1 && FSFW_UDP_SEND_WIRETAPPING_ENABLED == 1
     sif::debug << "TmTcUnixUdpBridge::sendTm: " << bytesSent << " bytes were"
@@ -119,8 +140,9 @@ ReturnValue_t TmTcWinUdpBridge::sendTm(const uint8_t *data, size_t dataLen) {
     return HasReturnvaluesIF::RETURN_OK;
 }
 
-void TmTcWinUdpBridge::checkAndSetClientAddress(sockaddr_in newAddress) {
+void TmTcWinUdpBridge::checkAndSetClientAddress(sockaddr_in& newAddress) {
-    MutexGuard lock(mutex, MutexIF::TimeoutType::WAITING, 10);
+    /* The target address can be set by different threads so this lock ensures thread-safety */
+    MutexGuard lock(mutex, timeoutType, mutexTimeoutMs);
 
 #if FSFW_CPP_OSTREAM_ENABLED == 1 && FSFW_UDP_SEND_WIRETAPPING_ENABLED == 1
     char ipAddress [15];
@@ -133,93 +155,13 @@ void TmTcWinUdpBridge::checkAndSetClientAddress(sockaddr_in newAddress) {
 
     /* 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;
+        clientAddress = newAddress;
         clientAddressLen = sizeof(clientAddress);
     }
 }
 
-void TmTcWinUdpBridge::handleSocketError() {
+void TmTcWinUdpBridge::setMutexProperties(MutexIF::TimeoutType timeoutType,
-    int errCode = WSAGetLastError();
+        dur_millis_t timeoutMs) {
-    switch(errCode) {
+    this->timeoutType = timeoutType;
-    case(WSANOTINITIALISED): {
+    this->mutexTimeoutMs = timeoutMs;
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::warning << "TmTcWinUdpBridge::handleSocketError: WSANOTINITIALISED: WSAStartup"
-                " call necessary" << std::endl;
-#endif
-        break;
 }
-    default: {
-        /*
-        https://docs.microsoft.com/en-us/windows/win32/winsock/
-        windows-sockets-error-codes-2
-         */
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::warning << "TmTcWinUdpBridge::handleSocketError: Error code: " << errCode << std::endl;
-#endif
-        break;
-    }
-    }
-}
-
-void TmTcWinUdpBridge::handleBindError() {
-    int errCode = WSAGetLastError();
-    switch(errCode) {
-    case(WSANOTINITIALISED): {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::info << "TmTcWinUdpBridge::handleBindError: WSANOTINITIALISED: "
-                << "WSAStartup call necessary" << std::endl;
-#endif
-        break;
-    }
-    case(WSAEADDRINUSE): {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-    	sif::warning << "TmTcWinUdpBridge::handleBindError: WSAEADDRINUSE: "
-    	        "Port is already in use!" << std::endl;
-#endif
-    	break;
-    }
-    default: {
-        /*
-        https://docs.microsoft.com/en-us/windows/win32/winsock/
-        windows-sockets-error-codes-2
-        */
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::info << "TmTcWinUdpBridge::handleBindError: Error code: "
-                << errCode << std::endl;
-#endif
-        break;
-    }
-    }
-}
-
-void TmTcWinUdpBridge::handleSendError() {
-    int errCode = WSAGetLastError();
-    switch(errCode) {
-    case(WSANOTINITIALISED): {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::info << "TmTcWinUdpBridge::handleSendError: WSANOTINITIALISED: "
-                << "WSAStartup(...) call necessary" << std::endl;
-#endif
-        break;
-    }
-    case(WSAEADDRNOTAVAIL): {
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::info << "TmTcWinUdpBridge::handleSendError: WSAEADDRNOTAVAIL: "
-                << "Check target address. " << std::endl;
-#endif
-        break;
-    }
-    default: {
-        /*
-        https://docs.microsoft.com/en-us/windows/win32/winsock/
-        windows-sockets-error-codes-2
-        */
-#if FSFW_CPP_OSTREAM_ENABLED == 1
-        sif::info << "TmTcWinUdpBridge::handleSendError: Error code: "
-                << errCode << std::endl;
-#endif
-        break;
-    }
-    }
-}
-

osal/windows/TmTcWinUdpBridge.h

@@ -4,54 +4,41 @@
 #include "../../tmtcservices/TmTcBridge.h"
 
 #include <winsock2.h>
-#include <windows.h>
-
-//! Debugging preprocessor define.
-#define FSFW_UDP_SEND_WIRETAPPING_ENABLED    0
 
 class TmTcWinUdpBridge: public TmTcBridge {
     friend class TcWinUdpPollingTask;
 public:
     /* The ports chosen here should not be used by any other process. */
-    static constexpr uint16_t DEFAULT_UDP_SERVER_PORT = 7301;
+    static const std::string DEFAULT_UDP_SERVER_PORT;
-    static constexpr uint16_t DEFAULT_UDP_CLIENT_PORT = 7302;
 
     TmTcWinUdpBridge(object_id_t objectId, object_id_t tcDestination,
-            object_id_t tmStoreId, object_id_t tcStoreId,
+            object_id_t tmStoreId, object_id_t tcStoreId, std::string udpServerPort = "");
-            uint16_t serverPort = 0xFFFF,uint16_t clientPort = 0xFFFF);
     virtual~ TmTcWinUdpBridge();
 
-    void checkAndSetClientAddress(sockaddr_in clientAddress);
+    /**
+     * Set properties of internal mutex.
+     */
+    void setMutexProperties(MutexIF::TimeoutType timeoutType, dur_millis_t timeoutMs);
+
+    ReturnValue_t initialize() override;
+
+    void checkAndSetClientAddress(sockaddr_in& clientAddress);
 
 protected:
     virtual ReturnValue_t sendTm(const uint8_t * data, size_t dataLen) override;
 
 private:
     SOCKET serverSocket = 0;
-
+    std::string udpServerPort;
-    const int serverSocketOptions = 0;
 
     struct sockaddr_in clientAddress;
     int clientAddressLen = 0;
 
-    struct sockaddr_in serverAddress;
+    //! Access to the client address is mutex protected as it is set by another task.
-    int serverAddressLen = 0;
+    MutexIF::TimeoutType timeoutType = MutexIF::TimeoutType::WAITING;
-
+    dur_millis_t mutexTimeoutMs = 20;
-    //! Access to the client address is mutex protected as it is set
-    //! by another task.
     MutexIF* mutex;
-
-    enum class ErrorSources {
-        SOCKET_CALL,
-        SETSOCKOPT_CALL
 };
 
-    void handleSocketError();
-    void handleBindError();
-    void handleSendError();
-};
-
-
-
 #endif /* FSFW_OSAL_HOST_TMTCWINUDPBRIDGE_H_ */
 

osal/windows/tcpipHelpers.cpp

@@ -0,0 +1,63 @@
+#include "tcpipHelpers.h"
+#include <FSFWConfig.h>
+
+#include "../../tasks/TaskFactory.h"
+#include "../../serviceinterface/ServiceInterface.h"
+
+
+#include <winsock2.h>
+#include <string>
+
+void tcpip::handleError(Protocol protocol, ErrorSources errorSrc, dur_millis_t sleepDuration) {
+#if FSFW_VERBOSE_LEVEL >= 1
+    int errCode = WSAGetLastError();
+    std::string protocolString;
+    std::string errorSrcString;
+    determineErrorStrings(protocol, errorSrc, protocolString, errorSrcString);
+
+    std::string infoString;
+    switch(errCode) {
+    case(WSANOTINITIALISED): {
+        infoString = "WSANOTINITIALISED";
+        break;
+    }
+    case(WSAEADDRINUSE): {
+        infoString = "WSAEADDRINUSE";
+        break;
+    }
+    case(WSAEFAULT): {
+        infoString = "WSAEFAULT";
+        break;
+    }
+    case(WSAEADDRNOTAVAIL): {
+        infoString = "WSAEADDRNOTAVAIL";
+        break;
+    }
+    case(WSAEINVAL): {
+        infoString = "WSAEINVAL";
+        break;
+    }
+    default: {
+        /*
+        https://docs.microsoft.com/en-us/windows/win32/winsock/windows-sockets-error-codes-2
+         */
+        infoString = "Error code: " + std::to_string(errCode);
+        break;
+    }
+    }
+
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+    sif::warning << "tcpip::handleError: " << protocolString << " | " << errorSrcString <<
+            " | " << infoString << std::endl;
+#else
+    sif::printWarning("tcpip::handleError: %s | %s | %s\n", protocolString,
+            errorSrcString, infoString);
+#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+
+#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+
+    if(sleepDuration > 0) {
+        TaskFactory::instance()->delayTask(sleepDuration);
+    }
+}
+

osal/windows/tcpipHelpers.h

@@ -0,0 +1,15 @@
+#ifndef FSFW_OSAL_WINDOWS_TCPIPHELPERS_H_
+#define FSFW_OSAL_WINDOWS_TCPIPHELPERS_H_
+
+#include "../../timemanager/clockDefinitions.h"
+#include "../common/tcpipCommon.h"
+
+namespace tcpip {
+
+void handleError(Protocol protocol, ErrorSources errorSrc, dur_millis_t sleepDuration = 0);
+
+}
+
+
+
+#endif /* FSFW_OSAL_WINDOWS_TCPIPHELPERS_H_ */

tmtcservices/TmTcBridge.cpp

@@ -173,6 +173,9 @@ ReturnValue_t TmTcBridge::handleTmQueue() {
 
 ReturnValue_t TmTcBridge::storeDownlinkData(TmTcMessage *message) {
 	store_address_t storeId = 0;
+	if(tmFifo == nullptr) {
+	    return HasReturnvaluesIF::RETURN_FAILED;
+	}
 
 	if(tmFifo->full()) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1

unittest/tests/datapoollocal/DataSetTest.cpp

@@ -275,7 +275,6 @@ TEST_CASE("DataSetTest" , "[DataSetTest]") {
         }
 
         sharedSet.setReadCommitProtectionBehaviour(true);
-
     }
 
     /* we need to reset the subscription list because the pool owner

unittest/tests/datapoollocal/LocalPoolManagerTest.cpp

@@ -206,7 +206,7 @@ TEST_CASE("LocalPoolManagerTest" , "[LocManTest]") {
         CHECK(cdsShort.msDay_ll == Catch::Approx(timeCdsNow.msDay_ll).margin(1));
     }
 
-    SECTION("VariableUpdateTest") {
+    SECTION("VariableNotificationTest") {
         /* Acquire subscription interface */
         ProvidesDataPoolSubscriptionIF* subscriptionIF = poolOwner->getSubscriptionInterface();
         REQUIRE(subscriptionIF != nullptr);