X-Git-Url: http://git.ipfire.org/?p=people%2Fteissler%2Fipfire-2.x.git;a=blobdiff_plain;f=src%2Fmisc-progs%2Fopenvpnctrl.c;h=272db0faade2dc3abb79687ad1d077c7308b4175;hp=e6a8d3f1a5ec13d3927b14828387ac8b576c68ed;hb=e1a51ebb851be156104d3971b85f2572fc7eeb73;hpb=6925b8ef5815cab2d1ea290c8413fd42d0c55b7b

diff --git a/src/misc-progs/openvpnctrl.c b/src/misc-progs/openvpnctrl.c
index e6a8d3f1a..272db0faa 100644
--- a/src/misc-progs/openvpnctrl.c
+++ b/src/misc-progs/openvpnctrl.c
@@ -1,10 +1,14 @@
+#include <signal.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <sys/types.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
 #include <fcntl.h>
 #include "setuid.h"
+#include "netutil.h"
 #include "libsmooth.h"
 
 #define noovpndebug
@@ -21,15 +25,20 @@ char enableblue[STRING_SIZE] = "off";
 char enableorange[STRING_SIZE] = "off";
 
 // consts
-char OVPNRED[STRING_SIZE] = "OVPN";
-char OVPNBLUE[STRING_SIZE] = "OVPN_BLUE_";
-char OVPNORANGE[STRING_SIZE] = "OVPN_ORANGE_";
-char WRAPPERVERSION[STRING_SIZE] = "ipfire-2.1.0";
+char OVPNINPUT[STRING_SIZE] = "OVPNINPUT";
+char OVPNBLOCK[STRING_SIZE] = "OVPNBLOCK";
+char OVPNNAT[STRING_SIZE] = "OVPNNAT";
+char WRAPPERVERSION[STRING_SIZE] = "ipfire-2.2.4";
 
 struct connection_struct {
 	char name[STRING_SIZE];
+	char type[STRING_SIZE];
 	char proto[STRING_SIZE];
-	int port;
+	char status[STRING_SIZE];
+	char local_subnet[STRING_SIZE];
+	char transfer_subnet[STRING_SIZE];
+	char role[STRING_SIZE];
+	char port[STRING_SIZE];
 	struct connection_struct *next;
 };
 
@@ -46,9 +55,9 @@ void exithandler(void)
 void usage(void)
 {
 #ifdef ovpndebug
-	printf("Wrapper for OpenVPN v%s-debug\n", WRAPPERVERSION);
+	printf("Wrapper for OpenVPN %s-debug\n", WRAPPERVERSION);
 #else
-	printf("Wrapper for OpenVPN v%s\n", WRAPPERVERSION);
+	printf("Wrapper for OpenVPN %s\n", WRAPPERVERSION);
 #endif
 	printf("openvpnctrl <option>\n");
 	printf(" Valid options are:\n");
@@ -58,16 +67,18 @@ void usage(void)
 	printf("      kills/stops OpenVPN\n");
 	printf(" -r   --restart\n");
 	printf("      restarts OpenVPN (implicitly creates chains and firewall rules)\n");
+	printf(" -sn2n --start-net-2-net\n");
+	printf("      starts all net2net connections\n");
+	printf("      you may pass a connection name to the switch to only start a specific one\n");
+	printf(" -kn2n --kill-net-2-net\n");
+	printf("      kills all net2net connections\n");
+	printf("      you may pass a connection name to the switch to only start a specific one\n");
 	printf(" -d   --display\n");
 	printf("      displays OpenVPN status to syslog\n");
 	printf(" -fwr --firewall-rules\n");
 	printf("      removes current OpenVPN chains and rules and resets them according to the config\n");
 	printf(" -sdo --start-daemon-only\n");
 	printf("      starts OpenVPN daemon only\n");
-	printf(" -ccr --create-chains-and-rules\n");
-	printf("      creates chains and rules for OpenVPN\n");
-	printf(" -dcr --delete-chains-and-rules\n");
-	printf("      removes all chains for OpenVPN\n");
 	exit(1);
 }
 
@@ -80,7 +91,8 @@ connection *getConnections() {
 	}
 
 	char line[STRING_SIZE] = "";
-	char *result;
+	char result[STRING_SIZE] = "";
+	char *resultptr;
 	int count;
 	connection *conn_first = NULL;
 	connection *conn_last = NULL;
@@ -101,17 +113,39 @@ connection *getConnections() {
 		conn_last = conn_curr;
 
 		count = 0;
-		result = strtok(line, ",");
-		while (result) {
-			if (count == 2) {
+		char *lineptr = &line;
+		while (1) {
+			if (*lineptr == NULL)
+				break;
+
+			resultptr = result;
+			while (*lineptr != NULL) {
+				if (*lineptr == ',') {
+					lineptr++;
+					break;
+				}
+				*resultptr++ = *lineptr++;
+			}
+			*resultptr = '\0';
+
+			if (count == 1) {
+				strcpy(conn_curr->status, result);
+			} else if (count == 2) {
 				strcpy(conn_curr->name, result);
-			} else if (count == 12) {
+			} else if (count == 4) {
+				strcpy(conn_curr->type, result);
+			} else if (count == 7) {
+				strcpy(conn_curr->role, result);
+			} else if (count == 9) {
+				strcpy(conn_curr->local_subnet, result);
+			} else if (count == 28) {
+				strcpy(conn_curr->transfer_subnet, result);
+			} else if (count == 29) {
 				strcpy(conn_curr->proto, result);
-			} else if (count == 13) {
-				conn_curr->port = atoi(result);
+			} else if (count == 30) {
+				strcpy(conn_curr->port, result);
 			}
 
-			result = strtok(NULL, ",");
 			count++;
 		}
 	}
@@ -121,8 +155,43 @@ connection *getConnections() {
 	return conn_first;
 }
 
+int readPidFile(const char *pidfile) {
+	FILE *fp = fopen(pidfile, "r");
+	if (fp == NULL) {
+		exit(1);
+	}
+
+	int pid = 0;
+	fscanf(fp, "%d", &pid);
+	fclose(fp);
+
+	return pid;
+}
+
+int readExternalAddress(char* address) {
+	FILE *fp = fopen("/var/ipfire/red/local-ipaddress", "r");
+	if (!fp)
+		goto ERROR;
+
+	int r = fscanf(fp, "%s", address);
+	fclose(fp);
+
+	if (r < 0)
+		goto ERROR;
+
+	/* In case the read IP address is not valid, we empty
+	 * the content of address and return non-zero. */
+	if (!VALID_IP(address))
+		goto ERROR;
+
+	return 0;
+
+ERROR:
+	address = NULL;
+	return 1;
+}
+
 void ovpnInit(void) {
-	
 	// Read OpenVPN configuration
 	kv = initkeyvalues();
 	if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings")) {
@@ -131,17 +200,14 @@ void ovpnInit(void) {
 	}
 
 	if (!findkey(kv, "ENABLED", enablered)) {
-		fprintf(stderr, "Cannot read ENABLED\n");
 		exit(1);
 	}
 
 	if (!findkey(kv, "ENABLED_BLUE", enableblue)){
-		fprintf(stderr, "Cannot read ENABLED_BLUE\n");
 		exit(1);
 	}
 
 	if (!findkey(kv, "ENABLED_ORANGE", enableorange)){
-		fprintf(stderr, "Cannot read ENABLED_ORANGE\n");
 		exit(1);
 	}
 	freekeyvalues(kv);
@@ -167,24 +233,22 @@ void ovpnInit(void) {
 	}
 
 	kv=initkeyvalues();
-	if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings"))
-	{
+	if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
 		fprintf(stderr, "Cannot read ethernet settings\n");
 		exit(1);
 	}
 	
-	if (strcmp(enableblue, "on")==0){
-		if (!findkey(kv, "BLUE_DEV", blueif)){
-			fprintf(stderr, "Cannot read BLUE_DEV\n");
+	if (strcmp(enableblue, "on") == 0) {
+		if (!findkey(kv, "BLUE_DEV", blueif)) {
 			exit(1);
 		}
 	}
-	if (strcmp(enableorange, "on")==0){
-		if (!findkey(kv, "ORANGE_DEV", orangeif)){
-			fprintf(stderr, "Cannot read ORNAGE_DEV\n");
+
+	if (strcmp(enableorange, "on") == 0) {
+		if (!findkey(kv, "ORANGE_DEV", orangeif)) {
 			exit(1);
 		}
-	}		
+	}
 	freekeyvalues(kv);
 }
 
@@ -195,113 +259,109 @@ void executeCommand(char *command) {
 	safe_system(strncat(command, " >/dev/null 2>&1", 17));
 }
 
-void setChainRules(char *chain, char *interface, char *protocol, char *port)
-{
-	char str[STRING_SIZE];
-	
-	sprintf(str, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %s -j ACCEPT", chain, interface, protocol, port);
-	executeCommand(str);
-	sprintf(str, "/sbin/iptables -A %sINPUT -i tun+ -j ACCEPT", chain);
-	executeCommand(str);
-	sprintf(str, "/sbin/iptables -A %sFORWARD -i tun+ -j ACCEPT", chain);
-	executeCommand(str);
+void addRule(const char *chain, const char *interface, const char *protocol, const char *port) {
+	char command[STRING_SIZE];
+
+	snprintf(command, STRING_SIZE - 1, "/sbin/iptables -A %s -i %s -p %s --dport %s -j ACCEPT",
+		chain, interface, protocol, port);
+	executeCommand(command);
 }
 
 void flushChain(char *chain) {
 	char str[STRING_SIZE];
 
-	sprintf(str, "/sbin/iptables -F %sINPUT", chain);
-	executeCommand(str);
-	sprintf(str, "/sbin/iptables -F %sFORWARD", chain);
+	snprintf(str, STRING_SIZE - 1, "/sbin/iptables -F %s", chain);
 	executeCommand(str);
-	safe_system(str);
 }
 
-void deleteChainReference(char *chain) {
+void flushChainNAT(char *chain) {
 	char str[STRING_SIZE];
 
-	sprintf(str, "/sbin/iptables -D INPUT -j %sINPUT", chain);
+	snprintf(str, STRING_SIZE - 1, "/sbin/iptables -t nat -F %s", chain);
 	executeCommand(str);
-	safe_system(str);
-	sprintf(str, "/sbin/iptables -D FORWARD -j %sFORWARD", chain);
-	executeCommand(str);
-	safe_system(str);
 }
 
-void deleteChain(char *chain) {
-	char str[STRING_SIZE];
+char* calcTransferNetAddress(const connection* conn) {
+	char *subnetmask = strdup(conn->transfer_subnet);
+	char *address = strsep(&subnetmask, "/");
 
-	sprintf(str, "/sbin/iptables -X %sINPUT", chain);
-	executeCommand(str);
-	sprintf(str, "/sbin/iptables -X %sFORWARD", chain);
-	executeCommand(str);
-}
+	if ((address == NULL) || (subnetmask == NULL)) {
+		goto ERROR;
+	}
 
-void deleteAllChains(void) {
-	// not an elegant solution, but to avoid timing problems with undeleted chain references
-	deleteChainReference(OVPNRED);
-	deleteChainReference(OVPNBLUE);
-	deleteChainReference(OVPNORANGE);
-	flushChain(OVPNRED);
-	flushChain(OVPNBLUE);
-	flushChain(OVPNORANGE);
-	deleteChain(OVPNRED);
-	deleteChain(OVPNBLUE);
-	deleteChain(OVPNORANGE);
-}
+	in_addr_t _address    = inet_addr(address);
+	in_addr_t _subnetmask = inet_addr(subnetmask);
+	_address &= _subnetmask;
 
-void createChainReference(char *chain) {
-	char str[STRING_SIZE];
-	sprintf(str, "/sbin/iptables -I INPUT %s -j %sINPUT", "14", chain);
-	executeCommand(str);
-	sprintf(str, "/sbin/iptables -I FORWARD %s -j %sFORWARD", "12", chain);
-	executeCommand(str);
-}
+	if (strcmp(conn->role, "server") == 0) {
+		_address += 1 << 24;
+	} else if (strcmp(conn->role, "client") == 0) {
+		_address += 2 << 24;
+	} else {
+		goto ERROR;
+	}
 
-void createChain(char *chain) {
-	char str[STRING_SIZE];
-	sprintf(str, "/sbin/iptables -N %sINPUT", chain);
-	executeCommand(str);
-	sprintf(str, "/sbin/iptables -N %sFORWARD", chain);
-	executeCommand(str);
+	struct in_addr address_info;
+	address_info.s_addr = _address;
+
+	return inet_ntoa(address_info);
+
+ERROR:
+	fprintf(stderr, "Could not determine transfer net address: %s\n", conn->name);
+
+	free(address);
+	return NULL;
 }
 
-void createAllChains(void) {
-	if (!((strcmp(enablered, "on")==0) || (strcmp(enableblue, "on")==0) || (strcmp(enableorange, "on")==0))){
-		fprintf(stderr, "OpenVPN is not enabled on any interface\n");
+char* getLocalSubnetAddress(const connection* conn) {
+	kv = initkeyvalues();
+	if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
+		fprintf(stderr, "Cannot read ethernet settings\n");
 		exit(1);
-	} else {
-		// create chain and chain references
-		if (!strcmp(enableorange, "on")) {
-			if (strlen(orangeif)) {
-				createChain(OVPNORANGE);
-				createChainReference(OVPNORANGE);
-			} else {
-				fprintf(stderr, "OpenVPN enabled on orange but no orange interface found\n");
-				//exit(1);
-			}
-		}
-	
-		if (!strcmp(enableblue, "on")) {
-			if (strlen(blueif)) {
-				createChain(OVPNBLUE);
-				createChainReference(OVPNBLUE);
-			} else {
-				fprintf(stderr, "OpenVPN enabled on blue but no blue interface found\n");
-				//exit(1);
-			}
-		}
-	
-		if (!strcmp(enablered, "on")) {
-			if (strlen(redif)) {
-				createChain(OVPNRED);
-				createChainReference(OVPNRED);
-			} else {
-				fprintf(stderr, "OpenVPN enabled on red but no red interface found\n");
-				//exit(1);
-			}
+	}
+
+	const char *zones[] = {"GREEN", "BLUE", "ORANGE", NULL};
+	char *zone = NULL;
+
+	// Get net address of the local openvpn subnet.
+	char *subnetmask = strdup(conn->local_subnet);
+	char *address = strsep(&subnetmask, "/");
+
+	if ((address == NULL) || (subnetmask == NULL)) {
+		goto ERROR;
+	}
+
+	in_addr_t _address    = inet_addr(address);
+	in_addr_t _subnetmask = inet_addr(subnetmask);
+
+	in_addr_t _netaddr    = (_address &  _subnetmask);
+	in_addr_t _broadcast  = (_address | ~_subnetmask);
+
+	char zone_address_key[STRING_SIZE];
+	char zone_address[STRING_SIZE];
+	in_addr_t zone_addr;
+
+	int i = 0;
+	while (zones[i]) {
+		zone = zones[i++];
+		snprintf(zone_address_key, STRING_SIZE, "%s_ADDRESS", zone);
+
+		if (!findkey(kv, zone_address_key, zone_address))
+			continue;
+
+		zone_addr = inet_addr(zone_address);
+		if ((zone_addr > _netaddr) && (zone_addr < _broadcast)) {
+			freekeyvalues(kv);
+
+			return strdup(zone_address);
 		}
 	}
+
+ERROR:
+	fprintf(stderr, "Could not determine local subnet address: %s\n", conn->name);
+
+	freekeyvalues(kv);
+	return NULL;
 }
 
 void setFirewallRules(void) {
@@ -309,12 +369,6 @@ void setFirewallRules(void) {
 	char dport[STRING_SIZE] = "";
 	char dovpnip[STRING_SIZE] = "";
 
-	/* check if it makes sence to proceed further */
-	if (!((strcmp(enablered, "on")==0) || (strcmp(enableblue, "on")==0) || (strcmp(enableorange, "on")==0))){
-		fprintf(stderr, "Config error, at least one device must be enabled\n");
-		exit(1);
-	}
-
 	kv = initkeyvalues();
 	if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings"))
 	{
@@ -335,26 +389,48 @@ void setFirewallRules(void) {
 
 	if (!findkey(kv, "VPN_IP", dovpnip)){
 		fprintf(stderr, "Cannot read VPN_IP\n");
-//		exit(1); step further as we don't need an ip
 	}
 	freekeyvalues(kv);
 
-	// read connection configuration
-	connection *conn = getConnections();
+	// Flush all chains.
+	flushChain(OVPNINPUT);
+	flushChain(OVPNBLOCK);
+	flushChainNAT(OVPNNAT);
 
 	// set firewall rules
 	if (!strcmp(enablered, "on") && strlen(redif))
-		setChainRules(OVPNRED, redif, protocol, dport);
+		addRule(OVPNINPUT, redif, protocol, dport);
 	if (!strcmp(enableblue, "on") && strlen(blueif))
-		setChainRules(OVPNBLUE, blueif, protocol, dport);
+		addRule(OVPNINPUT, blueif, protocol, dport);
 	if (!strcmp(enableorange, "on") && strlen(orangeif))
-		setChainRules(OVPNORANGE, orangeif, protocol, dport);
+		addRule(OVPNINPUT, orangeif, protocol, dport);
+
+	// read connection configuration
+	connection *conn = getConnections();
 
 	// set firewall rules for n2n connections
-	char port[STRING_SIZE];
-	while (conn) {
-		sprintf(port, "%d", conn->port);
-		setChainRules(OVPNRED, redif, &conn->proto, &port);
+	char command[STRING_SIZE];
+	char *local_subnet_address = NULL;
+	char *transfer_subnet_address = NULL;
+	while (conn != NULL) {
+		if (strcmp(conn->type, "net") == 0) {
+			addRule(OVPNINPUT, redif, conn->proto, conn->port);
+
+			/* Block all communication from the transfer nets. */
+			snprintf(command, STRING_SIZE - 1, "/sbin/iptables -A %s -s %s -j DROP",
+				OVPNBLOCK, conn->transfer_subnet);
+			executeCommand(command);
+
+			local_subnet_address = getLocalSubnetAddress(conn);
+			transfer_subnet_address = calcTransferNetAddress(conn);
+
+			if ((local_subnet_address) && (transfer_subnet_address)) {
+				snprintf(command, STRING_SIZE - 1, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
+					OVPNNAT, transfer_subnet_address, local_subnet_address);
+				executeCommand(command);
+			}
+		}
+
 		conn = conn->next;
 	}
 }
@@ -362,18 +438,22 @@ void setFirewallRules(void) {
 void stopDaemon(void) {
 	char command[STRING_SIZE];
 
-	snprintf(command, STRING_SIZE - 1, "/bin/killall openvpn");
-	executeCommand(command);
+	int pid = readPidFile("/var/run/openvpn.pid");
+	if (!pid > 0) {
+		exit(1);
+	}
+
+	fprintf(stderr, "Killing PID %d.\n", pid);
+	kill(pid, SIGTERM);
+
 	snprintf(command, STRING_SIZE - 1, "/bin/rm -f /var/run/openvpn.pid");
 	executeCommand(command);
-	snprintf(command, STRING_SIZE-1, "/sbin/modprobe -r tun");
-	executeCommand(command);
 }
 
 void startDaemon(void) {
 	char command[STRING_SIZE];
 	
-	if (!((strcmp(enablered, "on")==0) || (strcmp(enableblue, "on")==0) || (strcmp(enableorange, "on")==0))){
+	if (!((strcmp(enablered, "on") == 0) || (strcmp(enableblue, "on") == 0) || (strcmp(enableorange, "on") == 0))) {
 		fprintf(stderr, "OpenVPN is not enabled on any interface\n");
 		exit(1);
 	} else {
@@ -384,14 +464,14 @@ void startDaemon(void) {
 	}
 }
 
-void startNet2Net(char *name) {
+int startNet2Net(char *name) {
 	connection *conn = NULL;
 	connection *conn_iter;
 
 	conn_iter = getConnections();
 
 	while (conn_iter) {
-		if (strcmp(conn_iter->name, name) == 0) {
+		if ((strcmp(conn_iter->type, "net") == 0) && (strcmp(conn_iter->name, name) == 0)) {
 			conn = conn_iter;
 			break;
 		}
@@ -400,16 +480,130 @@ void startNet2Net(char *name) {
 
 	if (conn == NULL) {
 		fprintf(stderr, "Connection not found.\n");
+		return 1;
+	}
+
+	if (strcmp(conn->status, "on") != 0) {
+		fprintf(stderr, "Connection '%s' is not enabled.\n", conn->name);
+		return 1;
+	}
+
+	fprintf(stderr, "Starting connection %s...\n", conn->name);
+
+	char configfile[STRING_SIZE];
+	snprintf(configfile, STRING_SIZE - 1, CONFIG_ROOT "/ovpn/n2nconf/%s/%s.conf",
+		conn->name, conn->name);
+
+	FILE *fp = fopen(configfile, "r");
+	if (fp == NULL) {
+		fprintf(stderr, "Could not find configuration file for connection '%s' at '%s'.\n",
+			conn->name, configfile);
+		return 2;
+	}
+	fclose(fp);
+
+	// Make sure all firewall rules are up to date.
+	setFirewallRules();
+
+	// Get the external IP address.
+	char address[STRING_SIZE] = "";
+	int r = readExternalAddress(address);
+	if (r) {
+		fprintf(stderr, "Could not read the external address\n");
 		exit(1);
 	}
 
 	char command[STRING_SIZE];
-	sprintf(command, "/usr/sbin/openvpn --config " CONFIG_ROOT "/ovpn/n2nconf/%s/%s.conf", conn->name, conn->name);
+	snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
+	executeCommand(command);
+	snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --local %s --config %s", address, configfile);
 	executeCommand(command);
+
+	return 0;
 }
 
-void killNet2Net(char *conn) {
-	printf("TO BE DONE %s\n", conn);
+int killNet2Net(char *name) {
+	connection *conn = NULL;
+	connection *conn_iter;
+
+	conn_iter = getConnections();
+
+	while (conn_iter) {
+		if (strcmp(conn_iter->name, name) == 0) {
+			conn = conn_iter;
+			break;
+		}
+		conn_iter = conn_iter->next;
+	}
+
+	if (conn == NULL) {
+		fprintf(stderr, "Connection not found.\n");
+		return 1;
+	}
+
+	char pidfile[STRING_SIZE];
+	snprintf(pidfile, STRING_SIZE - 1, "/var/run/%sn2n.pid", conn->name);
+
+	int pid = readPidFile(pidfile);
+	if (!pid > 0) {
+		fprintf(stderr, "Could not read pid file of connection %s.", conn->name);
+		return 1;
+	}
+
+	fprintf(stderr, "Killing connection %s (PID %d)...\n", conn->name, pid);
+	kill(pid, SIGTERM);
+
+	char command[STRING_SIZE];
+	snprintf(command, STRING_SIZE - 1, "/bin/rm -f %s", pidfile);
+	executeCommand(command);
+
+	return 0;
+}
+
+void startAllNet2Net() {
+	int exitcode = 0, _exitcode = 0;
+
+	connection *conn = getConnections();
+
+	while(conn) {
+		/* Skip all connections that are not of type "net" or disabled. */
+		if ((strcmp(conn->type, "net") != 0) || (strcmp(conn->status, "on") != 0)) {
+			conn = conn->next;
+			continue;
+		}
+
+		_exitcode = startNet2Net(conn->name);
+		conn = conn->next;
+
+		if (_exitcode > exitcode) {
+			exitcode = _exitcode;
+		}
+	}
+
+	exit(exitcode);
+}
+
+void killAllNet2Net() {
+	int exitcode = 0, _exitcode = 0;
+
+	connection *conn = getConnections();
+
+	while(conn) {
+		/* Skip all connections that are not of type "net". */
+		if (strcmp(conn->type, "net") != 0) {
+			conn = conn->next;
+			continue;
+		}
+
+		_exitcode = killNet2Net(conn->name);
+		conn = conn->next;
+
+		if (_exitcode > exitcode) {
+			exitcode = _exitcode;
+		}
+	}
+
+	exit(exitcode);
 }
 
 void displayopenvpn(void) {
@@ -426,6 +620,8 @@ int main(int argc, char *argv[]) {
 	    usage();
 
 	if(argc == 3) {
+		ovpnInit();
+
 		if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
 			startNet2Net(argv[2]);
 			return 0;
@@ -447,40 +643,33 @@ int main(int argc, char *argv[]) {
 			displayopenvpn();
 			return 0;
 		}
-		else if( (strcmp(argv[1], "-dcr") == 0) || (strcmp(argv[1], "--delete-chains-and-rules") == 0) ) {
-			deleteAllChains();
-			return 0;
-		}
 		else {
 			ovpnInit();
 			
 			if( (strcmp(argv[1], "-s") == 0) || (strcmp(argv[1], "--start") == 0) ) {
-				deleteAllChains();
-				createAllChains();
 				setFirewallRules();
 				startDaemon();
 				return 0;
 			}
+			else if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
+				startAllNet2Net();
+				return 0;
+			}
+			else if( (strcmp(argv[1], "-kn2n") == 0) || (strcmp(argv[1], "--kill-net-2-net") == 0) ) {
+				killAllNet2Net();
+				return 0;
+			}
 			else if( (strcmp(argv[1], "-sdo") == 0) || (strcmp(argv[1], "--start-daemon-only") == 0) ) {
 				startDaemon();
 				return 0;
 			}
 			else if( (strcmp(argv[1], "-r") == 0) || (strcmp(argv[1], "--restart") == 0) ) {
 				stopDaemon();
-				deleteAllChains();
-				createAllChains();
 				setFirewallRules();
 				startDaemon();
 				return 0;
 			}
 			else if( (strcmp(argv[1], "-fwr") == 0) || (strcmp(argv[1], "--firewall-rules") == 0) ) {
-				deleteAllChains();
-				createAllChains();
-				setFirewallRules();
-				return 0;
-			}
-			else if( (strcmp(argv[1], "-ccr") == 0) || (strcmp(argv[1], "--create-chains-and-rules") == 0) ) {
-				createAllChains();
 				setFirewallRules();
 				return 0;
 			}