coucou

VM1-6/Vagrantfile

@@ -25,7 +25,7 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
 
   config.vm.provider "virtualbox" do |vb|
   # Commenter pour s'exécuter sans GUI
-    vb.gui = true
+    # vb.gui = true
 
     vb.customize ["modifyvm", :id, "--memory", "768"]
   end

VM3-6/Vagrantfile

@@ -25,7 +25,7 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
 
   config.vm.provider "virtualbox" do |vb|
   # Commenter pour s'exécuter sans GUI
-    vb.gui = true
+    # vb.gui = true
 
     vb.customize ["modifyvm", :id, "--memory", "768"]
   end

partage/Makefile

@@ -1,40 +1,31 @@
-CC := gcc -Wall -Wextra -Wpedantic -Werror -Iinclude -std=c11 -g
+CC := gcc -Wall -Wextra -Wpedantic -Werror -Iinclude -g
+
+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)
 
 
-all: build test-iftun ext-in ext-out
+all: ext-in ext-out test-iftun tunnel64d
 
-build:
+$(OUT): $(OBJS)
-	-mkdir build
+	$(CC) $(LDFLAGS) -o $@ $^
 
-ext-in: build/ext-in.o build/extremite.a
-	$(CC) $(CFLAGS) $^ -o $@
 
-ext-out: build/ext-out.o build/extremite.a
+-include $(DEPS)
-	$(CC) $(CFLAGS) $^ -o $@
+$(BUILD_DIR)/%.o: src/%.c
+	$(CC) $(CFLAGS) -MP -MD $< -c -o $@
 
-build/ext-in.o: src/ext-in.c src/extremite.h
-	$(CC) $(CFLAGS) $< -c -o $@
-
-build/ext-out.o: src/ext-out.c src/extremite.h
-	$(CC) $(CFLAGS) $< -c -o $@
-
-build/extremite.a: build/extremite.o
-	ar rcs $@ $<
-
-build/extremite.o: src/extremite.c src/extremite.h
-	$(CC) $(CFLAGS) $< -c -o $@
-
-test-iftun: build/test-iftun.o build/iftun.a
-	$(CC) $(CFLAGS) $^ -o $@
-
-build/test-iftun.o: src/test-iftun.c src/iftun.h
-	$(CC) $(CFLAGS) $< -c -o $@
-
-build/iftun.a: build/iftun.o
-	ar rcs $@ $<
-
-build/iftun.o: src/iftun.c src/iftun.h
-	$(CC) $(CFLAGS) $< -c -o $@
 
 clean:
 	-rm -f $(BUILD_DIR)/*.o

partage/Makefile.old

@@ -0,0 +1,46 @@
+CC := gcc -Wall -Wextra -Wpedantic -Werror -Iinclude -std=c11 -g -D_POSIX_C_SOURCE=200809L
+
+
+all: build test-iftun ext-in ext-out tunnel64d
+
+build:
+	-mkdir build
+
+tunnel64d: build/tunnel64d.o build/iftun.a build/extremite.a
+	$(CC) $(CFLAGS) $^ -o $@
+
+build/tunnel64d.o: src/tunnel64d.c src/iftun.h src/extremite.h
+	$(CC) $(CFLAGS) $< -c -o $@
+
+ext-in: build/ext-in.o build/extremite.a build/iftun.a
+	$(CC) $(CFLAGS) $^ -o $@
+
+ext-out: build/ext-out.o build/extremite.a build/iftun.a
+	$(CC) $(CFLAGS) $^ -o $@
+
+build/ext-in.o: src/ext-in.c src/extremite.h src/iftun.h
+	$(CC) $(CFLAGS) $< -c -o $@
+
+build/ext-out.o: src/ext-out.c src/extremite.h src/iftun.h
+	$(CC) $(CFLAGS) $< -c -o $@
+
+build/extremite.a: build/extremite.o
+	ar rcs $@ $<
+
+build/extremite.o: src/extremite.c src/extremite.h
+	$(CC) $(CFLAGS) $< -c -o $@
+
+test-iftun: build/test-iftun.o build/iftun.a
+	$(CC) $(CFLAGS) $^ -o $@
+
+build/test-iftun.o: src/test-iftun.c src/iftun.h
+	$(CC) $(CFLAGS) $< -c -o $@
+
+build/iftun.a: build/iftun.o
+	ar rcs $@ $<
+
+build/iftun.o: src/iftun.c src/iftun.h
+	$(CC) $(CFLAGS) $< -c -o $@
+
+clean:
+	-rm -f build/*

partage/capture.txt

@@ -0,0 +1,23 @@
+No.     Time           Source                Destination           Protocol Length Info
+      1 0.000000000    172.16.2.1            172.16.2.10           ICMP     84     Echo (ping) request  id=0x0529, seq=1/256, ttl=64 (no response found!)
+
+Frame 1: 84 bytes on wire (672 bits), 84 bytes captured (672 bits) on interface 0
+Raw packet data
+Internet Protocol Version 4, Src: 172.16.2.1 (172.16.2.1), Dst: 172.16.2.10 (172.16.2.10)
+Internet Control Message Protocol
+
+No.     Time           Source                Destination           Protocol Length Info
+      2 1.009432000    172.16.2.1            172.16.2.10           ICMP     84     Echo (ping) request  id=0x0529, seq=2/512, ttl=64 (no response found!)
+
+Frame 2: 84 bytes on wire (672 bits), 84 bytes captured (672 bits) on interface 0
+Raw packet data
+Internet Protocol Version 4, Src: 172.16.2.1 (172.16.2.1), Dst: 172.16.2.10 (172.16.2.10)
+Internet Control Message Protocol
+
+No.     Time           Source                Destination           Protocol Length Info
+      3 2.016974000    172.16.2.1            172.16.2.10           ICMP     84     Echo (ping) request  id=0x0529, seq=3/768, ttl=64 (no response found!)
+
+Frame 3: 84 bytes on wire (672 bits), 84 bytes captured (672 bits) on interface 0
+Raw packet data
+Internet Protocol Version 4, Src: 172.16.2.1 (172.16.2.1), Dst: 172.16.2.10 (172.16.2.10)
+Internet Control Message Protocol

partage/config.vm1-6

@@ -0,0 +1,9 @@
+# interface tun
+tun=tun0
+# adresse locale 
+inip=172.16.2.1/28
+inport=123
+options=
+# adresse distante
+outip=fc00:1234:2::36
+outport=123

partage/config.vm3-6

@@ -0,0 +1,9 @@
+# interface tun
+tun=tun0
+# adresse locale 
+inip=172.16.2.10/28
+inport=123
+options=
+# adresse distante
+outip=fc00:1234:1::16
+outport=123

partage/configure-tun.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
-ip l set tun0 up
+ip l set "$1" up
-ip a a 172.16.2.1/28 dev tun0
+ip a a "$2" dev tun0

partage/src/ext-in.c

@@ -1,7 +1,10 @@
 #include "extremite.h"
+#include "iftun.h"
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
 
 
 int main(int argc, char *argv[argc]) {
@@ -13,6 +16,17 @@ int main(int argc, char *argv[argc]){
 		fprintf(stderr, "Utilisation : %s adresse [port]\n", argv[0]);
 		return 1;
 	}
-	ext_in(argv[1], port, 0);
+
+	if (getuid() != 0) {
+		fprintf(stderr, "%s doit être lancé en tant que superutilisateur.\n", argv[0]);
+		return 1;
+	}
+	int tun = tun_alloc("tun0");
+	if (system("./configure-tun.sh tun0 172.16.2.1/28") != 0) {
+		fprintf(stderr, "Erreur lors de l’exécution du script de configuration de l’interface.\n");
+		return 1;
+	}
+	ext_in(argv[1], port, tun);
+
 	return 0;
 }

partage/src/ext-out.c

@@ -1,7 +1,10 @@
 #include "extremite.h"
+#include "iftun.h"
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
 
 
 int main(int argc, char *argv[argc]) {
@@ -13,6 +16,17 @@ int main(int argc, char *argv[argc]) {
 		fprintf(stderr, "Utilisation : %s [port]\n", argv[0]);
 		return 1;
 	}
-	ext_out(port);
+
+	if (getuid() != 0) {
+		fprintf(stderr, "%s doit être lancé en tant que superutilisateur.\n", argv[0]);
+		return 1;
+	}
+	int tun = tun_alloc("tun0");
+	if (system("./configure-tun.sh tun0 172.16.2.10/28") != 0) {
+		fprintf(stderr, "Erreur lors de l’exécution du script de configuration de l’interface.\n");
+		return 1;
+	}
+	ext_out(port, tun);
+
 	return 0;
 }

partage/src/extremite.c

@@ -1,5 +1,3 @@
-#define _POSIX_C_SOURCE 200112L
-
 #include <arpa/inet.h>
 #include <fcntl.h>
 #include <linux/if.h>
@@ -15,15 +13,21 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
+#include <sys/wait.h>
 
 
-void ext_out(int port) {
+#define BUFSIZE 1024
+
+
+void ext_out(int port, int out) {
 	int server = socket(AF_INET6, SOCK_STREAM, 0);
 	if (server == -1) {
 		perror("socket");
 		exit(1);
 	}
 
+	setsockopt(server, SOL_SOCKET, SO_REUSEADDR, &(int) {1}, sizeof (int));
+
 	struct sockaddr_in6 server_addr = {0};
 	server_addr.sin6_family = AF_INET6;
 	server_addr.sin6_port = htons(port);
@@ -49,10 +53,19 @@ void ext_out(int port) {
 	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[1024];
+	char buf[BUFSIZE];
+	ssize_t n;
 	while (1) {
-		ssize_t n = read(client, buf, sizeof buf);
+		n = read(client, buf, sizeof buf);
-		write(1, buf, n);
+		if (n == -1) {
+			perror("read");
+			exit(1);
+		}
+		n = write(out, buf, n);
+		if (n == -1) {
+			perror("write");
+			exit(1);
+		}
 	}
 
 	close(client);
@@ -73,17 +86,18 @@ void ext_in(const char addr[], int port, int in) {
 	inet_pton(AF_INET6, addr, &sa.sin6_addr);
 
 	puts("Connexion.");
-	if (connect(s, (struct sockaddr *) &sa, sizeof sa) == -1) {
+	while (connect(s, (struct sockaddr *) &sa, sizeof sa) == -1) {
 		perror("connect");
-		exit(1);
+		sleep(1);
 	}
 	char addr_pretty[INET6_ADDRSTRLEN] = "";
 	inet_ntop(AF_INET6, &(sa.sin6_addr), addr_pretty, sizeof addr_pretty);
 	printf("Connecté à : %s\n", addr_pretty);
 
-	char buf[1024];
+	char buf[BUFSIZE];
+	ssize_t n;
 	while (1) {
-		ssize_t n = read(in, buf, sizeof buf);
+		n = read(in, buf, sizeof buf);
 		if (n == -1) {
 			perror("read");
 			exit(1);
@@ -97,3 +111,15 @@ void ext_in(const char addr[], int port, int in) {
 
 	close(s);
 }
+
+
+void ext_bidir(const char addr[], int port, int in, int out) {
+	pid_t pid = fork();
+	if (pid == 0) {
+		ext_in(addr, port, in);
+	}
+	else {
+		ext_out(port, out);
+		waitpid(pid, NULL, 0);
+	}
+}

partage/src/extremite.h

@@ -2,8 +2,9 @@
 #define EXTREMITE_H
 
 
-void ext_out(int port);
+void ext_out(int port, int out);
 void ext_in(const char addr[], int port, int in);
+void ext_bidir(const char addr[], int port, int in, int out);
 
 
 #endif

partage/src/iftun.c

@@ -17,15 +17,16 @@
 #include <linux/if_tun.h>
 
 
-int tun_alloc(char *dev) {
+int tun_alloc(const char *dev) {
 	int fd = open("/dev/net/tun", O_RDWR);
 	if(fd < 0) {
-		perror("alloc tun");
+		perror("open");
 		exit(1);
 	}
 
-	struct ifreq ifr = {.ifr_flags = IFF_TUN};
+	struct ifreq ifr = {
-	ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
+		.ifr_flags = IFF_TUN | IFF_NO_PI
+	};
 
 	if (*dev) {
 		strncpy(ifr.ifr_name, dev, IFNAMSIZ);
@@ -33,11 +34,9 @@ int tun_alloc(char *dev) {
 
 	int err = ioctl(fd, TUNSETIFF, (void *) &ifr);
 	if(err < 0){
-		close(fd);
+		exit(1);
-		return err;
 	}
 
-	strcpy(dev, ifr.ifr_name);
 	return fd;
 }
 

partage/src/iftun.h

@@ -2,7 +2,7 @@
 #define IFTUN_H
 
 
-int tun_alloc(char *dev);
+int tun_alloc(const char *dev);
 int copy(int src, int dest);
 
 

partage/src/tunnel64d.c

@@ -0,0 +1,74 @@
+#include "iftun.h"
+#include "extremite.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+
+char *dev;
+char *inip;
+char *outip;
+int inport;
+int outport;
+
+
+int main(int argc, char *argv[argc]) {
+	if (argc != 2) {
+		fprintf(stderr, "Utilisation : %s fichier_conf\n", argv[0]);
+	}
+	if (getuid() != 0) {
+		fprintf(stderr, "%s doit être lancé en tant que superutilisateur.\n", argv[0]);
+		return 1;
+	}
+
+	FILE *f = fopen(argv[1], "r");
+
+	char *line = NULL;
+	size_t n = 0;
+	ssize_t len;
+	while ((len = getline(&line, &n, f)) > 0) {
+		char *pair = strtok(line, "#");
+		char *key = strtok(pair, "=");
+		char *val = strtok(NULL, "=");
+		if (val != NULL) {
+			line[len-1] = '\0';
+			printf("%s=%s\n", key, val);
+			if (strcmp(key, "tun") == 0) {
+				dev = malloc(strlen(val));
+				strcpy(dev, val);
+			}
+			else if (strcmp(key, "inip") == 0) {
+				inip = malloc(strlen(val) + 1);
+				strcpy(inip, val);
+			}
+			else if (strcmp(key, "outip") == 0) {
+				outip = malloc(strlen(val) + 1);
+				strcpy(outip, val);
+			}
+			else if (strcmp(key, "inport") == 0) {
+				inport = atoi(val);
+			}
+			else if (strcmp(key, "outport") == 0) {
+				outport = atoi(val);
+			}
+		}
+	}
+	if (line) free(line);
+	fclose(f);
+
+	int tun = tun_alloc(dev);
+
+	char full_cmd[1024] = "";
+	sprintf(full_cmd, "./configure-tun.sh %s %s", dev, inip);
+	if (system(full_cmd) != 0) {
+		fprintf(stderr, "Erreur lors de l’exécution du script de configuration de l’interface.\n");
+		return 1;
+	}
+	ext_bidir(outip, outport, tun, tun);
+
+	return 0;
+}