diff --git a/partage/Makefile b/partage/Makefile
index f2c2e93..d383ce4 100644
--- a/partage/Makefile
+++ b/partage/Makefile
@@ -1,32 +1,40 @@
-CC := gcc -Wall -Wextra -Wpedantic -Werror -Iinclude -g
+CC := gcc -Wall -Wextra -Wpedantic -Werror -Wshadow=local -Iinclude -Isrc -g -std=c11
 
-LIBS :=
-
-LDFLAGS := $(LDFLAGS) $(shell pkg-config --libs $(LIBS))
-CFLAGS := $(CFLAGS) $(shell pkg-config --cflags $(LIBS))
+# pkg-config
+# LIBS :=
+# LDFLAGS := $(LDFLAGS) $(shell pkg-config --libs $(LIBS))
+# CFLAGS := $(CFLAGS) $(shell pkg-config --cflags $(LIBS))
 
 CFLAGS := $(CFLAGS) -D_POSIX_C_SOURCE=200809L
 
-BUILD_DIR ?= build
-
 OUT := $(notdir $(shell pwd))
 
 SRC := $(wildcard src/*.c)
-OBJS := $(patsubst src/%.c,$(BUILD_DIR)/%.o,$(SRC))
-DEPS := $(wildcard $(BUILD_DIR)/*.d)
+TEST := $(wildcard test/*.c)
+OBJS := $(patsubst src/%.c,build/%.o,$(SRC))
+TEST_OBJS := $(patsubst test/%.c,build/test-%.o,$(TEST))
+DEPS := $(wildcard build/*.d)
 
 
 all: ext-in ext-out test-iftun tunnel64d
 
-$(OUT): $(OBJS)
+# $(OUT): $(OBJS)
+$(OUT):
 	$(CC) $(LDFLAGS) -o $@ $^
 
+test-ext-in: build/test-ext-in.o build/extremite.o build/iftun.o
+test-ext-out: build/test-ext-out.o build/extremite.o build/iftun.o
+test-iftun: build/test-iftun.o build/iftun.o
+
+tunnel64d: build/tunnel64d.o build/extremite.o build/iftun.o
 
 -include $(DEPS)
-$(BUILD_DIR)/%.o: src/%.c
+build/test-%.o: test/%.c
+	$(CC) $(CFLAGS) -MP -MD $< -c -o $@
+build/%.o: src/%.c
 	$(CC) $(CFLAGS) -MP -MD $< -c -o $@
 
 
 clean:
-	-rm -f $(BUILD_DIR)/*.o
-	-rm -f $(BUILD_DIR)/*.d
+	-rm -f build/*.o
+	-rm -f build/*.d
diff --git a/partage/src/extremite.c b/partage/src/extremite.c
index 16337b9..044096f 100644
--- a/partage/src/extremite.c
+++ b/partage/src/extremite.c
@@ -1,3 +1,5 @@
+#include "extremite.h"
+
 #include <arpa/inet.h>
 #include <fcntl.h>
 #include <linux/if.h>
@@ -19,7 +21,7 @@
 #define BUFSIZE 1024
 
 
-void ext_out(int port, int out) {
+int ext_out(int port) {
 	int server = socket(AF_INET6, SOCK_STREAM, 0);
 	if (server == -1) {
 		perror("socket");
@@ -40,7 +42,7 @@ void ext_out(int port, int out) {
 	inet_ntop(AF_INET6, &(server_addr.sin6_addr), server_addr_pretty, sizeof server_addr_pretty);
 	printf("Écoute sur : %s\n", server_addr_pretty);
 
-	if (listen(server, SOMAXCONN) == -1) {
+	if (listen(server, 1) == -1) {
 		perror("listen");
 		exit(1);
 	}
@@ -49,31 +51,35 @@ void ext_out(int port, int out) {
 	socklen_t client_addr_len;
 	puts("Attente d’un client.");
 	int client = accept(server, (struct sockaddr *) &client_addr, &client_addr_len);
+
+	close(server);
+
 	char client_addr_pretty[INET6_ADDRSTRLEN] = "";
 	inet_ntop(AF_INET6, &(client_addr.sin6_addr), client_addr_pretty, sizeof client_addr_pretty);
 	printf("Client connecté : %s\n", client_addr_pretty);
 
-	char buf[BUFSIZE];
-	ssize_t n;
-	while (1) {
-		n = read(client, buf, sizeof buf);
-		if (n == -1) {
-			perror("read");
-			exit(1);
-		}
-		n = write(out, buf, n);
-		if (n == -1) {
-			perror("write");
-			exit(1);
-		}
-	}
+	return client;
 
-	close(client);
-	close(server);
+	/* char buf[BUFSIZE]; */
+	/* ssize_t n; */
+	/* while (1) { */
+	/* 	n = read(client, buf, sizeof buf); */
+	/* 	if (n == -1) { */
+	/* 		perror("read"); */
+	/* 		exit(1); */
+	/* 	} */
+	/* 	n = write(out, buf, n); */
+	/* 	if (n == -1) { */
+	/* 		perror("write"); */
+	/* 		exit(1); */
+	/* 	} */
+	/* } */
+
+	/* close(client); */
 }
 
 
-void ext_in(const char addr[], int port, int in) {
+int ext_in(const char addr[], int port) {
 	int s = socket(AF_INET6, SOCK_STREAM, 0);
 	if (s == -1) {
 		perror("socket");
@@ -94,32 +100,37 @@ void ext_in(const char addr[], int port, int in) {
 	inet_ntop(AF_INET6, &(sa.sin6_addr), addr_pretty, sizeof addr_pretty);
 	printf("Connecté à : %s\n", addr_pretty);
 
-	char buf[BUFSIZE];
-	ssize_t n;
-	while (1) {
-		n = read(in, buf, sizeof buf);
-		if (n == -1) {
-			perror("read");
-			exit(1);
-		}
-		n = write(s, buf, n);
-		if (n == -1) {
-			perror("write");
-			exit(1);
-		}
-	}
+	return s;
 
-	close(s);
+	/* char buf[BUFSIZE]; */
+	/* ssize_t n; */
+	/* while (1) { */
+	/* 	n = read(in, buf, sizeof buf); */
+	/* 	if (n == -1) { */
+	/* 		perror("read"); */
+	/* 		exit(1); */
+	/* 	} */
+	/* 	n = write(s, buf, n); */
+	/* 	if (n == -1) { */
+	/* 		perror("write"); */
+	/* 		exit(1); */
+	/* 	} */
+	/* } */
+
+	/* close(s); */
 }
 
 
 void ext_bidir(const char addr[], int port, int in, int out) {
+	(void) in;
+	(void) out;
+
 	pid_t pid = fork();
 	if (pid == 0) {
-		ext_in(addr, port, in);
+		ext_in(addr, port);
 	}
 	else {
-		ext_out(port, out);
+		ext_out(port);
 		waitpid(pid, NULL, 0);
 	}
 }
diff --git a/partage/src/extremite.h b/partage/src/extremite.h
index ee70913..5753af1 100644
--- a/partage/src/extremite.h
+++ b/partage/src/extremite.h
@@ -2,8 +2,8 @@
 #define EXTREMITE_H
 
 
-void ext_out(int port, int out);
-void ext_in(const char addr[], int port, int in);
+int ext_out(int port);
+int ext_in(const char addr[], int port);
 void ext_bidir(const char addr[], int port, int in, int out);
 
 
diff --git a/partage/src/ext-in.c b/partage/test/ext-in.c
similarity index 92%
rename from partage/src/ext-in.c
rename to partage/test/ext-in.c
index d61bcf0..ded07e6 100644
--- a/partage/src/ext-in.c
+++ b/partage/test/ext-in.c
@@ -26,7 +26,9 @@ int main(int argc, char *argv[argc]) {
 		fprintf(stderr, "Erreur lors de l’exécution du script de configuration de l’interface.\n");
 		return 1;
 	}
-	ext_in(argv[1], port, tun);
+
+	int ext = ext_in(argv[1], port);
+	copy(tun, ext);
 
 	return 0;
 }
diff --git a/partage/src/ext-out.c b/partage/test/ext-out.c
similarity index 93%
rename from partage/src/ext-out.c
rename to partage/test/ext-out.c
index 0bada03..6d9e138 100644
--- a/partage/src/ext-out.c
+++ b/partage/test/ext-out.c
@@ -26,7 +26,9 @@ int main(int argc, char *argv[argc]) {
 		fprintf(stderr, "Erreur lors de l’exécution du script de configuration de l’interface.\n");
 		return 1;
 	}
-	ext_out(port, tun);
+
+	int ext = ext_out(port);
+	copy(ext, tun);
 
 	return 0;
 }
diff --git a/partage/src/test-iftun.c b/partage/test/iftun.c
similarity index 100%
rename from partage/src/test-iftun.c
rename to partage/test/iftun.c