--- a/src/CMakeLists.txt	Sun May 01 18:42:50 2022 +0200
+++ b/src/CMakeLists.txt	Tue Jul 26 23:22:18 2022 +0200
@@ -34,7 +34,7 @@
 )
 
 # Link libraries:
-target_link_libraries(${EXECUTABLE_FILE} ${RELPIPE_LIBS_LIBRARIES} rt)
+target_link_libraries(${EXECUTABLE_FILE} ${RELPIPE_LIBS_LIBRARIES})
 set_property(TARGET ${EXECUTABLE_FILE} PROPERTY INSTALL_RPATH_USE_LINK_PATH TRUE)
 
 install(TARGETS ${EXECUTABLE_FILE} DESTINATION bin)

--- a/src/Socket.h	Sun May 01 18:42:50 2022 +0200
+++ b/src/Socket.h	Tue Jul 26 23:22:18 2022 +0200
@@ -16,10 +16,14 @@
  */
 #pragma once
 
-#include <mqueue.h>
 #include <string>
+#include <cstring>
+#include <unistd.h>
 #include <stdexcept>
-#include <cstring>
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
 
 namespace relpipe {
 namespace out {
@@ -27,41 +31,28 @@
 
 class Socket {
 private:
-	const static size_t MSG_SIZE = 8192; // TODO: configurable/dynamic
-	std::string queueName;
-	mqd_t handle = -2;
-	bool unlinkOnClose = false;
-
-	Socket(std::string queueName, mqd_t handle, bool unlinkOnClose) : queueName(queueName), handle(handle), unlinkOnClose(unlinkOnClose) {
-	}
-
 public:
 
 	virtual ~Socket() {
-		if (handle >= 0) mq_close(handle);
-		if (unlinkOnClose) mq_unlink(queueName.c_str());
-	}
-
-	static Socket* open(std::string queueName, bool unlinkOnClose = false) {
-		mqd_t handle = mq_open(queueName.c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
-		if (handle >= 0) return new Socket(queueName, handle, unlinkOnClose);
-		else throw std::logic_error("Unable to open Socket: " + queueName + " error: " + strerror(errno));
 	}
 
-	void send(std::string message) {
-		int result = mq_send(handle, message.c_str(), message.size(), 0);
-		if (result) throw std::logic_error("Unable to send message to" + queueName + " error: " + strerror(errno));
-	}
+	void send(const std::string& message) {
+
+		struct sockaddr_in a;
+		memset((char *) &a, 0, sizeof (a));
+		a.sin_family = AF_INET;
+		a.sin_addr.s_addr = inet_addr("127.0.0.1"); // TODO: use getaddrinfo() instead (because of error -1 = 255.255.255.255)
+		a.sin_port = htons(1234);
 
-	std::string receive() {
-		char buffer[MSG_SIZE + 1];
-		memset(buffer, 0, MSG_SIZE + 1);
-		ssize_t msgSize = mq_receive(handle, buffer, MSG_SIZE, nullptr);
+		int s = ::socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+		sendto(s, message.c_str(), message.size(), 0, (sockaddr*) & a, sizeof (a));
+		
+		close(s);
 
-		if (msgSize > sizeof (buffer))throw std::logic_error("Invalid Socket message size.");
-		else if (msgSize >= 0) return std::string(buffer, msgSize);
-		else throw std::logic_error("Unable to receive Socket message from " + queueName + " error: " + strerror(errno));
+		// TODO: send message
 	}
+	
+	// virtual const std::string receive();
 
 };
 

--- a/src/SocketHandler.h	Sun May 01 18:42:50 2022 +0200
+++ b/src/SocketHandler.h	Tue Jul 26 23:22:18 2022 +0200
@@ -41,7 +41,7 @@
 private:
 	std::wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.
 	Configuration configuration;
-	shared_ptr<Socket> mq;
+	shared_ptr<Socket> socket;
 
 	struct CurrentRelation {
 		relpipe::common::type::StringX name;
@@ -54,7 +54,7 @@
 
 	SocketHandler(Configuration configuration) : configuration(configuration) {
 		// TODO: do not throw exception from the constructor: Socket::open()
-		mq.reset(Socket::open(convertor.to_bytes(configuration.queue), configuration.unlinkOnClose));
+		socket = std::make_shared<Socket>(); // TODO: create a TCP, UDP… socket
 	}
 
 	void startRelation(relpipe::common::type::StringX name, std::vector<relpipe::reader::handlers::AttributeMetadata> attributes) override {
@@ -72,7 +72,7 @@
 		currentRelation.attributeIndex++;
 		if (currentRelation.attributeIndex == currentRelation.attributes.size()) {
 			currentRelation.attributeIndex = 0;
-			mq->send(currentRelation.currentValue);
+			socket->send(currentRelation.currentValue);
 		}
 
 	}