diff --git a/tests/Makefile b/tests/Makefile
index 44162eb..ea133bb 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -7,16 +7,16 @@ LIBDIR := $(PREFIX)/lib
 SHAREDIR := $(PREFIX)/share
 INCLUDEDIR := $(PREFIX)/include
 MANDIR := $(SHAREDIR)/man
-
-CC := cc
-AR := ar
-RANLIB := ranlib
 CFLAGS := -Wall -Wextra -g
 LDFLAGS := -I../src -L../ ../src/ipc.h -lipc
+CC := cc
+CXX := c++
+LD := ${CC}
+CXXFLAGS :=  
 
 Q := @
 
-all: func_01_connection_establishment func_01_connection_establishmentd func_02_pong func_02_pongd func_03_multiple-communications-client func_03_multiple-communications-server func_04_empty_message unit_01_service-path unit_02_usock-remove unit_03_connection-add-remove
+all: func_01_connection_establishment func_01_connection_establishmentd func_02_pong func_02_pongd func_03_multiple-communications-client func_03_multiple-communications-server func_04_empty_message func_05_read-write-loop unit_01_service-path unit_02_usock-remove unit_03_connection-add-remove
 	@:
 
 func_01_connection_establishment: func_01_connection_establishment.o  
@@ -131,6 +131,22 @@ func_04_empty_message.uninstall:
 	@echo '  RM >    $(BINDIR)/func_04_empty_message'
 	$(Q)rm -f '$(DESTDIR)$(BINDIR)/func_04_empty_message'
 
+func_05_read-write-loop: func_05_read-write-loop.o  
+	@echo '  LD >    func_05_read-write-loop'
+	$(Q)$(CC) -o func_05_read-write-loop func_05_read-write-loop.o $(LDFLAGS)
+func_05_read-write-loop.install: func_05_read-write-loop
+	@echo '  IN >    $(BINDIR)/func_05_read-write-loop'
+	$(Q)mkdir -p '$(DESTDIR)$(BINDIR)'
+	$(Q)install -m0755 func_05_read-write-loop $(DESTDIR)$(BINDIR)/func_05_read-write-loop
+
+func_05_read-write-loop.clean:  func_05_read-write-loop.o.clean
+	@echo '  RM >    func_05_read-write-loop'
+	$(Q)rm -f func_05_read-write-loop
+
+func_05_read-write-loop.uninstall:
+	@echo '  RM >    $(BINDIR)/func_05_read-write-loop'
+	$(Q)rm -f '$(DESTDIR)$(BINDIR)/func_05_read-write-loop'
+
 unit_01_service-path: unit_01_service-path.o  
 	@echo '  LD >    unit_01_service-path'
 	$(Q)$(CC) -o unit_01_service-path unit_01_service-path.o $(LDFLAGS)
@@ -263,6 +279,18 @@ func_04_empty_message.o.clean:
 
 func_04_empty_message.o.uninstall:
 
+func_05_read-write-loop.o: func_05_read-write-loop.c  ./../src/ipc.h
+	@echo '  CC >    func_05_read-write-loop.o'
+	$(Q)$(CC) $(CFLAGS) -std=c11 -c func_05_read-write-loop.c  -std=c11 -o func_05_read-write-loop.o
+
+func_05_read-write-loop.o.install:
+
+func_05_read-write-loop.o.clean:
+	@echo '  RM >    func_05_read-write-loop.o'
+	$(Q)rm -f func_05_read-write-loop.o
+
+func_05_read-write-loop.o.uninstall:
+
 unit_01_service-path.o: unit_01_service-path.c  ./../src/ipc.h
 	@echo '  CC >    unit_01_service-path.o'
 	$(Q)$(CC) $(CFLAGS) -std=c11 -c unit_01_service-path.c  -std=c11 -o unit_01_service-path.o
@@ -317,25 +345,14 @@ $(DESTDIR)$(INCLUDEDIR):
 $(DESTDIR)$(MANDIR):
 	@echo '  DIR >   $(MANDIR)'
 	$(Q)mkdir -p $(DESTDIR)$(MANDIR)
-install: subdirs.install func_01_connection_establishment.install func_01_connection_establishmentd.install func_02_pong.install func_02_pongd.install func_03_multiple-communications-client.install func_03_multiple-communications-server.install func_04_empty_message.install unit_01_service-path.install unit_02_usock-remove.install unit_03_connection-add-remove.install func_01_connection_establishment.o.install func_01_connection_establishmentd.o.install func_02_pong.o.install func_02_pongd.o.install func_03_multiple-communications-client.o.install func_03_multiple-communications-server.o.install func_04_empty_message.o.install unit_01_service-path.o.install unit_02_usock-remove.o.install unit_03_connection-add-remove.o.install
+install: func_01_connection_establishment.install func_01_connection_establishmentd.install func_02_pong.install func_02_pongd.install func_03_multiple-communications-client.install func_03_multiple-communications-server.install func_04_empty_message.install func_05_read-write-loop.install unit_01_service-path.install unit_02_usock-remove.install unit_03_connection-add-remove.install func_01_connection_establishment.o.install func_01_connection_establishmentd.o.install func_02_pong.o.install func_02_pongd.o.install func_03_multiple-communications-client.o.install func_03_multiple-communications-server.o.install func_04_empty_message.o.install func_05_read-write-loop.o.install unit_01_service-path.o.install unit_02_usock-remove.o.install unit_03_connection-add-remove.o.install
 	@:
 
-subdirs.install:
-
-uninstall: subdirs.uninstall func_01_connection_establishment.uninstall func_01_connection_establishmentd.uninstall func_02_pong.uninstall func_02_pongd.uninstall func_03_multiple-communications-client.uninstall func_03_multiple-communications-server.uninstall func_04_empty_message.uninstall unit_01_service-path.uninstall unit_02_usock-remove.uninstall unit_03_connection-add-remove.uninstall func_01_connection_establishment.o.uninstall func_01_connection_establishmentd.o.uninstall func_02_pong.o.uninstall func_02_pongd.o.uninstall func_03_multiple-communications-client.o.uninstall func_03_multiple-communications-server.o.uninstall func_04_empty_message.o.uninstall unit_01_service-path.o.uninstall unit_02_usock-remove.o.uninstall unit_03_connection-add-remove.o.uninstall
+uninstall: func_01_connection_establishment.uninstall func_01_connection_establishmentd.uninstall func_02_pong.uninstall func_02_pongd.uninstall func_03_multiple-communications-client.uninstall func_03_multiple-communications-server.uninstall func_04_empty_message.uninstall func_05_read-write-loop.uninstall unit_01_service-path.uninstall unit_02_usock-remove.uninstall unit_03_connection-add-remove.uninstall func_01_connection_establishment.o.uninstall func_01_connection_establishmentd.o.uninstall func_02_pong.o.uninstall func_02_pongd.o.uninstall func_03_multiple-communications-client.o.uninstall func_03_multiple-communications-server.o.uninstall func_04_empty_message.o.uninstall func_05_read-write-loop.o.uninstall unit_01_service-path.o.uninstall unit_02_usock-remove.o.uninstall unit_03_connection-add-remove.o.uninstall
 	@:
 
-subdirs.uninstall:
-
-test: all subdirs subdirs.test
-	@:
-
-subdirs.test:
-
-clean: func_01_connection_establishment.clean func_01_connection_establishmentd.clean func_02_pong.clean func_02_pongd.clean func_03_multiple-communications-client.clean func_03_multiple-communications-server.clean func_04_empty_message.clean unit_01_service-path.clean unit_02_usock-remove.clean unit_03_connection-add-remove.clean func_01_connection_establishment.o.clean func_01_connection_establishmentd.o.clean func_02_pong.o.clean func_02_pongd.o.clean func_03_multiple-communications-client.o.clean func_03_multiple-communications-server.o.clean func_04_empty_message.o.clean unit_01_service-path.o.clean unit_02_usock-remove.o.clean unit_03_connection-add-remove.o.clean
-
+clean: func_01_connection_establishment.clean func_01_connection_establishmentd.clean func_02_pong.clean func_02_pongd.clean func_03_multiple-communications-client.clean func_03_multiple-communications-server.clean func_04_empty_message.clean func_05_read-write-loop.clean unit_01_service-path.clean unit_02_usock-remove.clean unit_03_connection-add-remove.clean func_01_connection_establishment.o.clean func_01_connection_establishmentd.o.clean func_02_pong.o.clean func_02_pongd.o.clean func_03_multiple-communications-client.o.clean func_03_multiple-communications-server.o.clean func_04_empty_message.o.clean func_05_read-write-loop.o.clean unit_01_service-path.o.clean unit_02_usock-remove.o.clean unit_03_connection-add-remove.o.clean
 distclean: clean
-
 dist: dist-gz dist-xz dist-bz2
 	$(Q)rm -- $(PACKAGE)-$(VERSION)
 
@@ -356,6 +373,7 @@ $(PACKAGE)-$(VERSION).tar.gz: distdir
 		$(PACKAGE)-$(VERSION)/func_01_connection_establishment.c \
 		$(PACKAGE)-$(VERSION)/func_03_multiple-communications-server.c \
 		$(PACKAGE)-$(VERSION)/unit_03_connection-add-remove.c \
+		$(PACKAGE)-$(VERSION)/func_05_read-write-loop.c \
 		$(PACKAGE)-$(VERSION)/func_03_multiple-communications-client.c \
 		$(PACKAGE)-$(VERSION)/unit_02_usock-remove.c \
 		$(PACKAGE)-$(VERSION)/func_01_connection_establishmentd.c
@@ -373,6 +391,7 @@ $(PACKAGE)-$(VERSION).tar.xz: distdir
 		$(PACKAGE)-$(VERSION)/func_01_connection_establishment.c \
 		$(PACKAGE)-$(VERSION)/func_03_multiple-communications-server.c \
 		$(PACKAGE)-$(VERSION)/unit_03_connection-add-remove.c \
+		$(PACKAGE)-$(VERSION)/func_05_read-write-loop.c \
 		$(PACKAGE)-$(VERSION)/func_03_multiple-communications-client.c \
 		$(PACKAGE)-$(VERSION)/unit_02_usock-remove.c \
 		$(PACKAGE)-$(VERSION)/func_01_connection_establishmentd.c
@@ -390,6 +409,7 @@ $(PACKAGE)-$(VERSION).tar.bz2: distdir
 		$(PACKAGE)-$(VERSION)/func_01_connection_establishment.c \
 		$(PACKAGE)-$(VERSION)/func_03_multiple-communications-server.c \
 		$(PACKAGE)-$(VERSION)/unit_03_connection-add-remove.c \
+		$(PACKAGE)-$(VERSION)/func_05_read-write-loop.c \
 		$(PACKAGE)-$(VERSION)/func_03_multiple-communications-client.c \
 		$(PACKAGE)-$(VERSION)/unit_02_usock-remove.c \
 		$(PACKAGE)-$(VERSION)/func_01_connection_establishmentd.c
@@ -406,10 +426,12 @@ help:
 	@echo '    - uninstall      Deinstalls the project.'
 	@echo ''
 	@echo 'CLI-modifiable variables:'
-	@echo '    - CC             ${CC}'
 	@echo '    - CFLAGS         ${CFLAGS}'
 	@echo '    - LDFLAGS        ${LDFLAGS}'
-	@echo '    - DESTDIR        ${DESTDIR}'
+	@echo '    - CC             ${CC}'
+	@echo '    - CXX            ${CXX}'
+	@echo '    - LD             ${LD}'
+	@echo '    - CXXFLAGS       ${CXXFLAGS}'
 	@echo '    - PREFIX         ${PREFIX}'
 	@echo '    - BINDIR         ${BINDIR}'
 	@echo '    - LIBDIR         ${LIBDIR}'
@@ -420,14 +442,15 @@ help:
 	@echo 'Project targets: '
 	@echo '    - func_01_connection_establishment binary'
 	@echo '    - func_01_connection_establishmentd binary'
-	@echo '    - func_02_pong   binary'
-	@echo '    - func_02_pongd  binary'
+	@echo '    - func_02_pong                   binary'
+	@echo '    - func_02_pongd                  binary'
 	@echo '    - func_03_multiple-communications-client binary'
 	@echo '    - func_03_multiple-communications-server binary'
-	@echo '    - func_04_empty_message binary'
-	@echo '    - unit_01_service-path binary'
-	@echo '    - unit_02_usock-remove binary'
-	@echo '    - unit_03_connection-add-remove binary'
+	@echo '    - func_04_empty_message          binary'
+	@echo '    - func_05_read-write-loop        binary'
+	@echo '    - unit_01_service-path           binary'
+	@echo '    - unit_02_usock-remove           binary'
+	@echo '    - unit_03_connection-add-remove  binary'
 	@echo ''
 	@echo 'Makefile options:'
 	@echo '    - gnu:           false'
@@ -435,5 +458,5 @@ help:
 	@echo ''
 	@echo 'Rebuild the Makefile with:'
 	@echo '    zsh ./build.zsh -c'
-.PHONY: all subdirs clean distclean dist install uninstall help
+.PHONY: all  clean distclean dist install uninstall help
 
diff --git a/tests/func_05_read-write-loop.c b/tests/func_05_read-write-loop.c
new file mode 100644
index 0000000..77b9f26
--- /dev/null
+++ b/tests/func_05_read-write-loop.c
@@ -0,0 +1,77 @@
+#define _BSD_SOURCE
+
+#include "../src/ipc.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+
+#define SERVICE_NAME "pong"
+#define SECURE_MALLOC(p, s, wat) p = malloc (s); if (p == NULL) { wat; }
+#define DEFAULT_MSG "coucou"
+
+
+int main(int argc, char * argv[], char **env)
+{
+	SECURE_DECLARATION(struct ipc_connection_info,srv);
+	SECURE_DECLARATION(struct ipc_event, event);
+
+	SECURE_DECLARATION (struct ipc_message, write_m);
+	SECURE_DECLARATION (struct ipc_message, read_m);
+
+	// timing the exchange duration
+	struct timeval tval_before, tval_after, tval_result;
+
+	size_t nb_rounds = 1000;
+	char *message_str = NULL;
+
+	if (argc > 1 && strncmp(argv[1], "-h", 2) == 0) {
+		fprintf (stderr, "usage: %s [nb-rounds [message]]\n", argv[0]);
+		fprintf (stderr, "default: nb-rounds = 1000, message='coucou'\n");
+		exit(0);
+	}
+
+	if (argc > 1) {
+		nb_rounds = (size_t) atoi(argv[1]);
+	}
+
+	if (argc > 2) {
+		message_str = argv[2];
+	}
+
+	if (message_str == NULL) {
+		// message par defaut
+		SECURE_MALLOC (message_str, strlen(DEFAULT_MSG) +1, exit(EXIT_FAILURE));
+		memcpy(message_str, DEFAULT_MSG, strlen(DEFAULT_MSG));
+	}
+
+	TEST_IPC_Q (ipc_connection (env, &srv, SERVICE_NAME), EXIT_FAILURE);
+
+	SECURE_MALLOC (write_m.payload, strlen(message_str), exit(EXIT_FAILURE));
+	memcpy (write_m.payload, message_str, strlen(message_str));
+	write_m.type = MSG_TYPE_DATA;
+	write_m.user_type = 42;
+	write_m.length = strlen(message_str);
+
+	gettimeofday(&tval_before, NULL);
+	for (size_t i = 0 ; i < nb_rounds ; i++) {
+		ipc_write (&srv, &write_m);
+
+		// reading
+		TEST_IPC_Q(ipc_read (&srv, &read_m), EXIT_FAILURE);
+		// printf ("received message (%d bytes): %*s\n", read_m.length, read_m.length, read_m.payload);
+		// ipc_message_empty (&read_m);
+
+	}
+	gettimeofday(&tval_after, NULL);
+
+	timersub(&tval_after, &tval_before, &tval_result);
+
+	printf("Time elapsed: %ld.%06ld\n", (long int)tval_result.tv_sec, (long int)tval_result.tv_usec);
+
+	// disconnection
+	TEST_IPC_Q (ipc_close (&srv), EXIT_FAILURE);
+
+    return EXIT_SUCCESS;
+}
diff --git a/tests/project.zsh b/tests/project.zsh
index 83c178d..4334749 100644
--- a/tests/project.zsh
+++ b/tests/project.zsh
@@ -2,8 +2,10 @@
 package=ipc-tests
 version=0.5.0
 
-CFLAGS="-Wall -Wextra -g"
-LDFLAGS="-I../src -L../ ../src/ipc.h -lipc"
+variables+=(
+	CFLAGS "-Wall -Wextra -g"
+	LDFLAGS "-I../src -L../ ../src/ipc.h -lipc"
+)
 
 targets=(
 	func_01_connection_establishment
@@ -13,6 +15,7 @@ targets=(
 	func_03_multiple-communications-client
 	func_03_multiple-communications-server
 	func_04_empty_message
+	func_05_read-write-loop
 	unit_01_service-path
 	unit_02_usock-remove
 	unit_03_connection-add-remove