src/misc-progs/openvpnctrl.c

   1 #include <signal.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <unistd.h>
   5 #include <stdlib.h>
   6 #include <sys/types.h>
   7 #include <arpa/inet.h>
   8 #include <netinet/in.h>
   9 #include <fcntl.h>
  10 #include "setuid.h"
  11 #include "libsmooth.h"
  12
  13 #define noovpndebug
  14
  15 // global vars
  16         struct keyvalue *kv = NULL;
  17         FILE *ifacefile = NULL;
  18
  19 char redif[STRING_SIZE];
  20 char blueif[STRING_SIZE];
  21 char orangeif[STRING_SIZE];
  22 char enablered[STRING_SIZE] = "off";
  23 char enableblue[STRING_SIZE] = "off";
  24 char enableorange[STRING_SIZE] = "off";
  25
  26 // consts
  27 char OVPNRED[STRING_SIZE] = "OVPN";
  28 char OVPNBLUE[STRING_SIZE] = "OVPN_BLUE_";
  29 char OVPNORANGE[STRING_SIZE] = "OVPN_ORANGE_";
  30 char OVPNNAT[STRING_SIZE] = "OVPNNAT";
  31 char WRAPPERVERSION[STRING_SIZE] = "ipfire-2.2.3";
  32
  33 struct connection_struct {
  34         char name[STRING_SIZE];
  35         char type[STRING_SIZE];
  36         char proto[STRING_SIZE];
  37         char status[STRING_SIZE];
  38         char local_subnet[STRING_SIZE];
  39         char transfer_subnet[STRING_SIZE];
  40         char role[STRING_SIZE];
  41         int port;
  42         struct connection_struct *next;
  43 };
  44
  45 typedef struct connection_struct connection;
  46
  47 void exithandler(void)
  48 {
  49         if(kv)
  50                 freekeyvalues(kv);
  51         if (ifacefile)
  52                 fclose(ifacefile);
  53 }
  54
  55 void usage(void)
  56 {
  57 #ifdef ovpndebug
  58         printf("Wrapper for OpenVPN %s-debug\n", WRAPPERVERSION);
  59 #else
  60         printf("Wrapper for OpenVPN %s\n", WRAPPERVERSION);
  61 #endif
  62         printf("openvpnctrl <option>\n");
  63         printf(" Valid options are:\n");
  64         printf(" -s   --start\n");
  65         printf("      starts OpenVPN (implicitly creates chains and firewall rules)\n");
  66         printf(" -k   --kill\n");
  67         printf("      kills/stops OpenVPN\n");
  68         printf(" -r   --restart\n");
  69         printf("      restarts OpenVPN (implicitly creates chains and firewall rules)\n");
  70         printf(" -sn2n --start-net-2-net\n");
  71         printf("      starts all net2net connections\n");
  72         printf("      you may pass a connection name to the switch to only start a specific one\n");
  73         printf(" -kn2n --kill-net-2-net\n");
  74         printf("      kills all net2net connections\n");
  75         printf("      you may pass a connection name to the switch to only start a specific one\n");
  76         printf(" -d   --display\n");
  77         printf("      displays OpenVPN status to syslog\n");
  78         printf(" -fwr --firewall-rules\n");
  79         printf("      removes current OpenVPN chains and rules and resets them according to the config\n");
  80         printf(" -sdo --start-daemon-only\n");
  81         printf("      starts OpenVPN daemon only\n");
  82         printf(" -ccr --create-chains-and-rules\n");
  83         printf("      creates chains and rules for OpenVPN\n");
  84         printf(" -dcr --delete-chains-and-rules\n");
  85         printf("      removes all chains for OpenVPN\n");
  86         exit(1);
  87 }
  88
  89 connection *getConnections() {
  90         FILE *fp = NULL;
  91
  92         if (!(fp = fopen(CONFIG_ROOT "/ovpn/ovpnconfig", "r"))) {
  93                 fprintf(stderr, "Could not open openvpn n2n configuration file.\n");
  94                 exit(1);
  95         }
  96
  97         char line[STRING_SIZE] = "";
  98         char result[STRING_SIZE] = "";
  99         char *resultptr;
 100         int count;
 101         connection *conn_first = NULL;
 102         connection *conn_last = NULL;
 103         connection *conn_curr;
 104
 105         while ((fgets(line, STRING_SIZE, fp) != NULL)) {
 106                 if (line[strlen(line) - 1] == '\n')
 107                         line[strlen(line) - 1] = '\0';
 108
 109                 conn_curr = (connection *)malloc(sizeof(connection));
 110                 memset(conn_curr, 0, sizeof(connection));
 111
 112                 if (conn_first == NULL) {
 113                         conn_first = conn_curr;
 114                 } else {
 115                         conn_last->next = conn_curr;
 116                 }
 117                 conn_last = conn_curr;
 118
 119                 count = 0;
 120                 char *lineptr = &line;
 121                 while (1) {
 122                         if (*lineptr == NULL)
 123                                 break;
 124
 125                         resultptr = result;
 126                         while (*lineptr != NULL) {
 127                                 if (*lineptr == ',') {
 128                                         lineptr++;
 129                                         break;
 130                                 }
 131                                 *resultptr++ = *lineptr++;
 132                         }
 133                         *resultptr = '\0';
 134
 135                         if (count == 1) {
 136                                 strcpy(conn_curr->status, result);
 137                         } else if (count == 2) {
 138                                 strcpy(conn_curr->name, result);
 139                         } else if (count == 4) {
 140                                 strcpy(conn_curr->type, result);
 141                         } else if (count == 7) {
 142                                 strcpy(conn_curr->role, result);
 143                         } else if (count == 9) {
 144                                 strcpy(conn_curr->local_subnet, result);
 145                         } else if (count == 28) {
 146                                 strcpy(conn_curr->transfer_subnet, result);
 147                         } else if (count == 29) {
 148                                 strcpy(conn_curr->proto, result);
 149                         } else if (count == 30) {
 150                                 conn_curr->port = atoi(result);
 151                         }
 152
 153                         count++;
 154                 }
 155         }
 156
 157         fclose(fp);
 158
 159         return conn_first;
 160 }
 161
 162 int readPidFile(const char *pidfile) {
 163         FILE *fp = fopen(pidfile, "r");
 164         if (fp == NULL) {
 165                 fprintf(stderr, "PID file not found: '%s'\n", pidfile);
 166                 exit(1);
 167         }
 168
 169         int pid = 0;
 170         fscanf(fp, "%d", &pid);
 171         fclose(fp);
 172
 173         return pid;
 174 }
 175
 176 void ovpnInit(void) {
 177
 178         // Read OpenVPN configuration
 179         kv = initkeyvalues();
 180         if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings")) {
 181                 fprintf(stderr, "Cannot read ovpn settings\n");
 182                 exit(1);
 183         }
 184
 185         if (!findkey(kv, "ENABLED", enablered)) {
 186                 fprintf(stderr, "Cannot read ENABLED\n");
 187                 exit(1);
 188         }
 189
 190         if (!findkey(kv, "ENABLED_BLUE", enableblue)){
 191                 fprintf(stderr, "Cannot read ENABLED_BLUE\n");
 192                 exit(1);
 193         }
 194
 195         if (!findkey(kv, "ENABLED_ORANGE", enableorange)){
 196                 fprintf(stderr, "Cannot read ENABLED_ORANGE\n");
 197                 exit(1);
 198         }
 199         freekeyvalues(kv);
 200
 201         // read interface settings
 202
 203         // details for the red int
 204         memset(redif, 0, STRING_SIZE);
 205         if ((ifacefile = fopen(CONFIG_ROOT "/red/iface", "r")))
 206         {
 207                 if (fgets(redif, STRING_SIZE, ifacefile))
 208                 {
 209                         if (redif[strlen(redif) - 1] == '\n')
 210                                 redif[strlen(redif) - 1] = '\0';
 211                 }
 212                 fclose (ifacefile);
 213                 ifacefile = NULL;
 214
 215                 if (!VALID_DEVICE(redif))
 216                 {
 217                         memset(redif, 0, STRING_SIZE);
 218                 }
 219         }
 220
 221         kv=initkeyvalues();
 222         if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings"))
 223         {
 224                 fprintf(stderr, "Cannot read ethernet settings\n");
 225                 exit(1);
 226         }
 227
 228         if (strcmp(enableblue, "on")==0){
 229                 if (!findkey(kv, "BLUE_DEV", blueif)){
 230                         fprintf(stderr, "Cannot read BLUE_DEV\n");
 231                         exit(1);
 232                 }
 233         }
 234         if (strcmp(enableorange, "on")==0){
 235                 if (!findkey(kv, "ORANGE_DEV", orangeif)){
 236                         fprintf(stderr, "Cannot read ORNAGE_DEV\n");
 237                         exit(1);
 238                 }
 239         }
 240         freekeyvalues(kv);
 241 }
 242
 243 void executeCommand(char *command) {
 244 #ifdef ovpndebug
 245         printf(strncat(command, "\n", 2));
 246 #endif
 247         safe_system(strncat(command, " >/dev/null 2>&1", 17));
 248 }
 249
 250 void setChainRules(char *chain, char *interface, char *protocol, char *port)
 251 {
 252         char str[STRING_SIZE];
 253
 254         sprintf(str, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %s -j ACCEPT", chain, interface, protocol, port);
 255         executeCommand(str);
 256         sprintf(str, "/sbin/iptables -A %sINPUT -i tun+ -j ACCEPT", chain);
 257         executeCommand(str);
 258         sprintf(str, "/sbin/iptables -A %sFORWARD -i tun+ -j ACCEPT", chain);
 259         executeCommand(str);
 260 }
 261
 262 void flushChain(char *chain) {
 263         char str[STRING_SIZE];
 264
 265         sprintf(str, "/sbin/iptables -F %sINPUT", chain);
 266         executeCommand(str);
 267         sprintf(str, "/sbin/iptables -F %sFORWARD", chain);
 268         executeCommand(str);
 269         safe_system(str);
 270 }
 271
 272 void flushChainNAT(char *chain) {
 273         char str[STRING_SIZE];
 274
 275         sprintf(str, "/sbin/iptables -t nat -F %s", chain);
 276         executeCommand(str);
 277 }
 278
 279 void deleteChainReference(char *chain) {
 280         char str[STRING_SIZE];
 281
 282         sprintf(str, "/sbin/iptables -D INPUT -j %sINPUT", chain);
 283         executeCommand(str);
 284         safe_system(str);
 285         sprintf(str, "/sbin/iptables -D FORWARD -j %sFORWARD", chain);
 286         executeCommand(str);
 287         safe_system(str);
 288 }
 289
 290 void deleteChain(char *chain) {
 291         char str[STRING_SIZE];
 292
 293         sprintf(str, "/sbin/iptables -X %sINPUT", chain);
 294         executeCommand(str);
 295         sprintf(str, "/sbin/iptables -X %sFORWARD", chain);
 296         executeCommand(str);
 297 }
 298
 299 void deleteAllChains(void) {
 300         // not an elegant solution, but to avoid timing problems with undeleted chain references
 301         deleteChainReference(OVPNRED);
 302         deleteChainReference(OVPNBLUE);
 303         deleteChainReference(OVPNORANGE);
 304         flushChain(OVPNRED);
 305         flushChain(OVPNBLUE);
 306         flushChain(OVPNORANGE);
 307         deleteChain(OVPNRED);
 308         deleteChain(OVPNBLUE);
 309         deleteChain(OVPNORANGE);
 310 }
 311
 312 void createChainReference(char *chain) {
 313         char str[STRING_SIZE];
 314         sprintf(str, "/sbin/iptables -I INPUT %s -j %sINPUT", "14", chain);
 315         executeCommand(str);
 316         sprintf(str, "/sbin/iptables -I FORWARD %s -j %sFORWARD", "12", chain);
 317         executeCommand(str);
 318 }
 319
 320 void createChain(char *chain) {
 321         char str[STRING_SIZE];
 322         sprintf(str, "/sbin/iptables -N %sINPUT", chain);
 323         executeCommand(str);
 324         sprintf(str, "/sbin/iptables -N %sFORWARD", chain);
 325         executeCommand(str);
 326 }
 327
 328 void createAllChains(void) {
 329         // create chain and chain references
 330         if (!strcmp(enableorange, "on")) {
 331                 if (strlen(orangeif)) {
 332                         createChain(OVPNORANGE);
 333                         createChainReference(OVPNORANGE);
 334                 } else {
 335                         fprintf(stderr, "OpenVPN enabled on orange but no orange interface found\n");
 336                         //exit(1);
 337                 }
 338         }
 339
 340         if (!strcmp(enableblue, "on")) {
 341                 if (strlen(blueif)) {
 342                         createChain(OVPNBLUE);
 343                         createChainReference(OVPNBLUE);
 344                 } else {
 345                         fprintf(stderr, "OpenVPN enabled on blue but no blue interface found\n");
 346                         //exit(1);
 347                 }
 348         }
 349
 350         if (!strcmp(enablered, "on")) {
 351                 if (strlen(redif)) {
 352                         createChain(OVPNRED);
 353                         createChainReference(OVPNRED);
 354                 } else {
 355                         fprintf(stderr, "OpenVPN enabled on red but no red interface found\n");
 356                         //exit(1);
 357                 }
 358         }
 359 }
 360
 361 char* calcTransferNetAddress(const connection* conn) {
 362         char *address = strdup(conn->transfer_subnet);
 363         address = strsep(&address, "/");
 364
 365         struct in_addr address_info;
 366         if (!inet_aton(address, &address_info)) {
 367                 goto ERROR;
 368         }
 369
 370         if (strcmp(conn->role, "server")) {
 371                 address_info.s_addr += 1 << 24;
 372         } else if (strcmp(conn->role, "client")) {
 373                 address_info.s_addr += 2 << 24;
 374         } else {
 375                 goto ERROR;
 376         }
 377
 378         address = inet_ntoa(address_info);
 379         return address;
 380
 381 ERROR:
 382         free(address);
 383         return NULL;
 384 }
 385
 386 char* getLocalSubnetAddress(const connection* conn) {
 387         kv = initkeyvalues();
 388         if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
 389                 fprintf(stderr, "Cannot read ethernet settings\n");
 390                 exit(1);
 391         }
 392
 393         const char *zones[] = {"GREEN", "BLUE", "ORANGE", NULL};
 394         char *zone = NULL;
 395
 396         // Get net address of the local openvpn subnet.
 397         char *subnetmask = strdup(conn->local_subnet);
 398         char *address = strsep(&subnetmask, "/");
 399
 400         if ((address == NULL) || (subnetmask == NULL)) {
 401                 goto ERROR;
 402         }
 403
 404         in_addr_t _address    = inet_addr(address);
 405         in_addr_t _subnetmask = inet_addr(subnetmask);
 406
 407         in_addr_t _netaddr    = (_address &  _subnetmask);
 408         in_addr_t _broadcast  = (_address | ~_subnetmask);
 409
 410         char zone_address_key[STRING_SIZE];
 411         char zone_address[STRING_SIZE];
 412         in_addr_t zone_addr;
 413
 414         int i = 0;
 415         while (zones[i]) {
 416                 zone = zones[i++];
 417                 snprintf(zone_address_key, STRING_SIZE, "%s_ADDRESS", zone);
 418
 419                 if (!findkey(kv, zone_address_key, zone_address))
 420                         continue;
 421
 422                 zone_addr = inet_addr(zone_address);
 423                 if ((zone_addr > _netaddr) && (zone_addr < _broadcast)) {
 424                         freekeyvalues(kv);
 425
 426                         return strdup(zone_address);
 427                 }
 428         }
 429
 430 ERROR:
 431         freekeyvalues(kv);
 432         return NULL;
 433 }
 434
 435 void setFirewallRules(void) {
 436         char protocol[STRING_SIZE] = "";
 437         char dport[STRING_SIZE] = "";
 438         char dovpnip[STRING_SIZE] = "";
 439
 440         kv = initkeyvalues();
 441         if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings"))
 442         {
 443                 fprintf(stderr, "Cannot read ovpn settings\n");
 444                 exit(1);
 445         }
 446
 447         /* we got one device, so lets proceed further   */
 448         if (!findkey(kv, "DDEST_PORT", dport)){
 449                 fprintf(stderr, "Cannot read DDEST_PORT\n");
 450                 exit(1);
 451         }
 452
 453         if (!findkey(kv, "DPROTOCOL", protocol)){
 454                 fprintf(stderr, "Cannot read DPROTOCOL\n");
 455                 exit(1);
 456         }
 457
 458         if (!findkey(kv, "VPN_IP", dovpnip)){
 459                 fprintf(stderr, "Cannot read VPN_IP\n");
 460 //              exit(1); step further as we don't need an ip
 461         }
 462         freekeyvalues(kv);
 463
 464         // Flush all chains.
 465         flushChain(OVPNRED);
 466         flushChain(OVPNBLUE);
 467         flushChain(OVPNORANGE);
 468         flushChainNAT(OVPNNAT);
 469
 470         // set firewall rules
 471         if (!strcmp(enablered, "on") && strlen(redif))
 472                 setChainRules(OVPNRED, redif, protocol, dport);
 473         if (!strcmp(enableblue, "on") && strlen(blueif))
 474                 setChainRules(OVPNBLUE, blueif, protocol, dport);
 475         if (!strcmp(enableorange, "on") && strlen(orangeif))
 476                 setChainRules(OVPNORANGE, orangeif, protocol, dport);
 477
 478         // read connection configuration
 479         connection *conn = getConnections();
 480
 481         // set firewall rules for n2n connections
 482         char command[STRING_SIZE];
 483         char *local_subnet_address = NULL;
 484         char *transfer_subnet_address = NULL;
 485         while (conn != NULL) {
 486                 if (strcmp(conn->type, "net") == 0) {
 487                         sprintf(command, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %d -j ACCEPT",
 488                                 OVPNRED, redif, conn->proto, conn->port);
 489                         executeCommand(command);
 490
 491                         local_subnet_address = getLocalSubnetAddress(conn);
 492                         transfer_subnet_address = calcTransferNetAddress(conn);
 493
 494                         snprintf(command, STRING_SIZE, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
 495                                 OVPNNAT, transfer_subnet_address, local_subnet_address);
 496                         executeCommand(command);
 497                 }
 498
 499                 conn = conn->next;
 500         }
 501 }
 502
 503 void stopDaemon(void) {
 504         char command[STRING_SIZE];
 505
 506         int pid = readPidFile("/var/run/openvpn.pid");
 507         if (!pid > 0) {
 508                 exit(1);
 509         }
 510
 511         fprintf(stderr, "Killing PID %d.\n", pid);
 512         kill(pid, SIGTERM);
 513
 514         snprintf(command, STRING_SIZE - 1, "/bin/rm -f /var/run/openvpn.pid");
 515         executeCommand(command);
 516 }
 517
 518 void startDaemon(void) {
 519         char command[STRING_SIZE];
 520
 521         if (!((strcmp(enablered, "on")==0) || (strcmp(enableblue, "on")==0) || (strcmp(enableorange, "on")==0))){
 522                 fprintf(stderr, "OpenVPN is not enabled on any interface\n");
 523                 exit(1);
 524         } else {
 525                 snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
 526                 executeCommand(command);
 527                 snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config /var/ipfire/ovpn/server.conf");
 528                 executeCommand(command);
 529         }
 530 }
 531
 532 int startNet2Net(char *name) {
 533         connection *conn = NULL;
 534         connection *conn_iter;
 535
 536         conn_iter = getConnections();
 537
 538         while (conn_iter) {
 539                 if ((strcmp(conn_iter->type, "net") == 0) && (strcmp(conn_iter->name, name) == 0)) {
 540                         conn = conn_iter;
 541                         break;
 542                 }
 543                 conn_iter = conn_iter->next;
 544         }
 545
 546         if (conn == NULL) {
 547                 fprintf(stderr, "Connection not found.\n");
 548                 return 1;
 549         }
 550
 551         if (strcmp(conn->status, "on") != 0) {
 552                 fprintf(stderr, "Connection '%s' is not enabled.\n", conn->name);
 553                 return 1;
 554         }
 555
 556         fprintf(stderr, "Starting connection %s...\n", conn->name);
 557
 558         char configfile[STRING_SIZE];
 559         snprintf(configfile, STRING_SIZE - 1, CONFIG_ROOT "/ovpn/n2nconf/%s/%s.conf",
 560                 conn->name, conn->name);
 561
 562         FILE *fp = fopen(configfile, "r");
 563         if (fp == NULL) {
 564                 fprintf(stderr, "Could not find configuration file for connection '%s' at '%s'.\n",
 565                         conn->name, configfile);
 566                 return 2;
 567         }
 568         fclose(fp);
 569
 570         // Make sure all firewall rules are up to date.
 571         setFirewallRules();
 572
 573         char command[STRING_SIZE];
 574         snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
 575         executeCommand(command);
 576         snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config %s", configfile);
 577         executeCommand(command);
 578
 579         return 0;
 580 }
 581
 582 int killNet2Net(char *name) {
 583         connection *conn = NULL;
 584         connection *conn_iter;
 585
 586         conn_iter = getConnections();
 587
 588         while (conn_iter) {
 589                 if (strcmp(conn_iter->name, name) == 0) {
 590                         conn = conn_iter;
 591                         break;
 592                 }
 593                 conn_iter = conn_iter->next;
 594         }
 595
 596         if (conn == NULL) {
 597                 fprintf(stderr, "Connection not found.\n");
 598                 return 1;
 599         }
 600
 601         char pidfile[STRING_SIZE];
 602         snprintf(pidfile, STRING_SIZE - 1, "/var/run/%sn2n.pid", conn->name);
 603
 604         int pid = readPidFile(pidfile);
 605         if (!pid > 0) {
 606                 fprintf(stderr, "Could not read pid file of connection %s.", conn->name);
 607                 return 1;
 608         }
 609
 610         fprintf(stderr, "Killing connection %s (PID %d)...\n", conn->name, pid);
 611         kill(pid, SIGTERM);
 612
 613         char command[STRING_SIZE];
 614         snprintf(command, STRING_SIZE - 1, "/bin/rm -f %s", pidfile);
 615         executeCommand(command);
 616
 617         return 0;
 618 }
 619
 620 void startAllNet2Net() {
 621         int exitcode = 0, _exitcode = 0;
 622
 623         connection *conn = getConnections();
 624
 625         while(conn) {
 626                 /* Skip all connections that are not of type "net" or disabled. */
 627                 if ((strcmp(conn->type, "net") != 0) || (strcmp(conn->status, "on") != 0)) {
 628                         conn = conn->next;
 629                         continue;
 630                 }
 631
 632                 _exitcode = startNet2Net(conn->name);
 633                 conn = conn->next;
 634
 635                 if (_exitcode > exitcode) {
 636                         exitcode = _exitcode;
 637                 }
 638         }
 639
 640         exit(exitcode);
 641 }
 642
 643 void killAllNet2Net() {
 644         int exitcode = 0, _exitcode = 0;
 645
 646         connection *conn = getConnections();
 647
 648         while(conn) {
 649                 /* Skip all connections that are not of type "net". */
 650                 if (strcmp(conn->type, "net") != 0) {
 651                         conn = conn->next;
 652                         continue;
 653                 }
 654
 655                 _exitcode = killNet2Net(conn->name);
 656                 conn = conn->next;
 657
 658                 if (_exitcode > exitcode) {
 659                         exitcode = _exitcode;
 660                 }
 661         }
 662
 663         exit(exitcode);
 664 }
 665
 666 void displayopenvpn(void) {
 667         char command[STRING_SIZE];
 668
 669         snprintf(command, STRING_SIZE - 1, "/bin/killall -sSIGUSR2 openvpn");
 670         executeCommand(command);
 671 }
 672
 673 int main(int argc, char *argv[]) {
 674         if (!(initsetuid()))
 675             exit(1);
 676         if(argc < 2)
 677             usage();
 678
 679         if(argc == 3) {
 680                 ovpnInit();
 681
 682                 if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
 683                         startNet2Net(argv[2]);
 684                         return 0;
 685                 }
 686                 else if( (strcmp(argv[1], "-kn2n") == 0) || (strcmp(argv[1], "--kill-net-2-net") == 0) ) {
 687                         killNet2Net(argv[2]);
 688                         return 0;
 689                 } else {
 690                         usage();
 691                         return 1;
 692                 }
 693         }
 694         else if(argc == 2) {
 695                 if( (strcmp(argv[1], "-k") == 0) || (strcmp(argv[1], "--kill") == 0) ) {
 696                         stopDaemon();
 697                         return 0;
 698                 }
 699                 else if( (strcmp(argv[1], "-d") == 0) || (strcmp(argv[1], "--display") == 0) ) {
 700                         displayopenvpn();
 701                         return 0;
 702                 }
 703                 else if( (strcmp(argv[1], "-dcr") == 0) || (strcmp(argv[1], "--delete-chains-and-rules") == 0) ) {
 704                         deleteAllChains();
 705                         return 0;
 706                 }
 707                 else {
 708                         ovpnInit();
 709
 710                         if( (strcmp(argv[1], "-s") == 0) || (strcmp(argv[1], "--start") == 0) ) {
 711                                 deleteAllChains();
 712                                 createAllChains();
 713                                 setFirewallRules();
 714                                 startDaemon();
 715                                 return 0;
 716                         }
 717                         else if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
 718                                 startAllNet2Net();
 719                                 return 0;
 720                         }
 721                         else if( (strcmp(argv[1], "-kn2n") == 0) || (strcmp(argv[1], "--kill-net-2-net") == 0) ) {
 722                                 killAllNet2Net();
 723                                 return 0;
 724                         }
 725                         else if( (strcmp(argv[1], "-sdo") == 0) || (strcmp(argv[1], "--start-daemon-only") == 0) ) {
 726                                 startDaemon();
 727                                 return 0;
 728                         }
 729                         else if( (strcmp(argv[1], "-r") == 0) || (strcmp(argv[1], "--restart") == 0) ) {
 730                                 stopDaemon();
 731                                 deleteAllChains();
 732                                 createAllChains();
 733                                 setFirewallRules();
 734                                 startDaemon();
 735                                 return 0;
 736                         }
 737                         else if( (strcmp(argv[1], "-fwr") == 0) || (strcmp(argv[1], "--firewall-rules") == 0) ) {
 738                                 deleteAllChains();
 739                                 createAllChains();
 740                                 setFirewallRules();
 741                                 return 0;
 742                         }
 743                         else if( (strcmp(argv[1], "-ccr") == 0) || (strcmp(argv[1], "--create-chains-and-rules") == 0) ) {
 744                                 createAllChains();
 745                                 setFirewallRules();
 746                                 return 0;
 747                         }
 748                         else {
 749                                 usage();
 750                                 return 0;
 751                         }
 752                 }
 753         }
 754         else {
 755                 usage();
 756                 return 0;
 757         }
 758 return 0;
 759 }
 760