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 OVPNBLOCK[STRING_SIZE] = "OVPNBLOCK";
  31 char OVPNNAT[STRING_SIZE] = "OVPNNAT";
  32 char WRAPPERVERSION[STRING_SIZE] = "ipfire-2.2.3";
  33
  34 struct connection_struct {
  35         char name[STRING_SIZE];
  36         char type[STRING_SIZE];
  37         char proto[STRING_SIZE];
  38         char status[STRING_SIZE];
  39         char local_subnet[STRING_SIZE];
  40         char transfer_subnet[STRING_SIZE];
  41         char role[STRING_SIZE];
  42         int port;
  43         struct connection_struct *next;
  44 };
  45
  46 typedef struct connection_struct connection;
  47
  48 void exithandler(void)
  49 {
  50         if(kv)
  51                 freekeyvalues(kv);
  52         if (ifacefile)
  53                 fclose(ifacefile);
  54 }
  55
  56 void usage(void)
  57 {
  58 #ifdef ovpndebug
  59         printf("Wrapper for OpenVPN %s-debug\n", WRAPPERVERSION);
  60 #else
  61         printf("Wrapper for OpenVPN %s\n", WRAPPERVERSION);
  62 #endif
  63         printf("openvpnctrl <option>\n");
  64         printf(" Valid options are:\n");
  65         printf(" -s   --start\n");
  66         printf("      starts OpenVPN (implicitly creates chains and firewall rules)\n");
  67         printf(" -k   --kill\n");
  68         printf("      kills/stops OpenVPN\n");
  69         printf(" -r   --restart\n");
  70         printf("      restarts OpenVPN (implicitly creates chains and firewall rules)\n");
  71         printf(" -sn2n --start-net-2-net\n");
  72         printf("      starts all net2net connections\n");
  73         printf("      you may pass a connection name to the switch to only start a specific one\n");
  74         printf(" -kn2n --kill-net-2-net\n");
  75         printf("      kills all net2net connections\n");
  76         printf("      you may pass a connection name to the switch to only start a specific one\n");
  77         printf(" -d   --display\n");
  78         printf("      displays OpenVPN status to syslog\n");
  79         printf(" -fwr --firewall-rules\n");
  80         printf("      removes current OpenVPN chains and rules and resets them according to the config\n");
  81         printf(" -sdo --start-daemon-only\n");
  82         printf("      starts OpenVPN daemon only\n");
  83         printf(" -ccr --create-chains-and-rules\n");
  84         printf("      creates chains and rules for OpenVPN\n");
  85         printf(" -dcr --delete-chains-and-rules\n");
  86         printf("      removes all chains for OpenVPN\n");
  87         exit(1);
  88 }
  89
  90 connection *getConnections() {
  91         FILE *fp = NULL;
  92
  93         if (!(fp = fopen(CONFIG_ROOT "/ovpn/ovpnconfig", "r"))) {
  94                 fprintf(stderr, "Could not open openvpn n2n configuration file.\n");
  95                 exit(1);
  96         }
  97
  98         char line[STRING_SIZE] = "";
  99         char result[STRING_SIZE] = "";
 100         char *resultptr;
 101         int count;
 102         connection *conn_first = NULL;
 103         connection *conn_last = NULL;
 104         connection *conn_curr;
 105
 106         while ((fgets(line, STRING_SIZE, fp) != NULL)) {
 107                 if (line[strlen(line) - 1] == '\n')
 108                         line[strlen(line) - 1] = '\0';
 109
 110                 conn_curr = (connection *)malloc(sizeof(connection));
 111                 memset(conn_curr, 0, sizeof(connection));
 112
 113                 if (conn_first == NULL) {
 114                         conn_first = conn_curr;
 115                 } else {
 116                         conn_last->next = conn_curr;
 117                 }
 118                 conn_last = conn_curr;
 119
 120                 count = 0;
 121                 char *lineptr = &line;
 122                 while (1) {
 123                         if (*lineptr == NULL)
 124                                 break;
 125
 126                         resultptr = result;
 127                         while (*lineptr != NULL) {
 128                                 if (*lineptr == ',') {
 129                                         lineptr++;
 130                                         break;
 131                                 }
 132                                 *resultptr++ = *lineptr++;
 133                         }
 134                         *resultptr = '\0';
 135
 136                         if (count == 1) {
 137                                 strcpy(conn_curr->status, result);
 138                         } else if (count == 2) {
 139                                 strcpy(conn_curr->name, result);
 140                         } else if (count == 4) {
 141                                 strcpy(conn_curr->type, result);
 142                         } else if (count == 7) {
 143                                 strcpy(conn_curr->role, result);
 144                         } else if (count == 9) {
 145                                 strcpy(conn_curr->local_subnet, result);
 146                         } else if (count == 28) {
 147                                 strcpy(conn_curr->transfer_subnet, result);
 148                         } else if (count == 29) {
 149                                 strcpy(conn_curr->proto, result);
 150                         } else if (count == 30) {
 151                                 conn_curr->port = atoi(result);
 152                         }
 153
 154                         count++;
 155                 }
 156         }
 157
 158         fclose(fp);
 159
 160         return conn_first;
 161 }
 162
 163 int readPidFile(const char *pidfile) {
 164         FILE *fp = fopen(pidfile, "r");
 165         if (fp == NULL) {
 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         // Read OpenVPN configuration
 178         kv = initkeyvalues();
 179         if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings")) {
 180                 fprintf(stderr, "Cannot read ovpn settings\n");
 181                 exit(1);
 182         }
 183
 184         if (!findkey(kv, "ENABLED", enablered)) {
 185                 exit(1);
 186         }
 187
 188         if (!findkey(kv, "ENABLED_BLUE", enableblue)){
 189                 exit(1);
 190         }
 191
 192         if (!findkey(kv, "ENABLED_ORANGE", enableorange)){
 193                 exit(1);
 194         }
 195         freekeyvalues(kv);
 196
 197         // read interface settings
 198
 199         // details for the red int
 200         memset(redif, 0, STRING_SIZE);
 201         if ((ifacefile = fopen(CONFIG_ROOT "/red/iface", "r")))
 202         {
 203                 if (fgets(redif, STRING_SIZE, ifacefile))
 204                 {
 205                         if (redif[strlen(redif) - 1] == '\n')
 206                                 redif[strlen(redif) - 1] = '\0';
 207                 }
 208                 fclose (ifacefile);
 209                 ifacefile = NULL;
 210
 211                 if (!VALID_DEVICE(redif))
 212                 {
 213                         memset(redif, 0, STRING_SIZE);
 214                 }
 215         }
 216
 217         kv=initkeyvalues();
 218         if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
 219                 fprintf(stderr, "Cannot read ethernet settings\n");
 220                 exit(1);
 221         }
 222
 223         if (strcmp(enableblue, "on") == 0) {
 224                 if (!findkey(kv, "BLUE_DEV", blueif)) {
 225                         exit(1);
 226                 }
 227         }
 228
 229         if (strcmp(enableorange, "on") == 0) {
 230                 if (!findkey(kv, "ORANGE_DEV", orangeif)) {
 231                         exit(1);
 232                 }
 233         }
 234         freekeyvalues(kv);
 235 }
 236
 237 void executeCommand(char *command) {
 238 #ifdef ovpndebug
 239         printf(strncat(command, "\n", 2));
 240 #endif
 241         safe_system(strncat(command, " >/dev/null 2>&1", 17));
 242 }
 243
 244 void setChainRules(char *chain, char *interface, char *protocol, char *port)
 245 {
 246         char str[STRING_SIZE];
 247
 248         sprintf(str, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %s -j ACCEPT", chain, interface, protocol, port);
 249         executeCommand(str);
 250 }
 251
 252 void flushChain(char *chain) {
 253         char str[STRING_SIZE];
 254
 255         sprintf(str, "/sbin/iptables -F %s", chain);
 256         executeCommand(str);
 257 }
 258
 259 void flushChainNAT(char *chain) {
 260         char str[STRING_SIZE];
 261
 262         sprintf(str, "/sbin/iptables -t nat -F %s", chain);
 263         executeCommand(str);
 264 }
 265
 266 void flushChainINPUT(char *chain) {
 267         char str[STRING_SIZE];
 268
 269         snprintf(str, STRING_SIZE, "%sINPUT", chain);
 270         flushChain(str);
 271 }
 272
 273 void deleteChainReference(char *chain) {
 274         char str[STRING_SIZE];
 275
 276         sprintf(str, "/sbin/iptables -D INPUT -j %sINPUT", chain);
 277         executeCommand(str);
 278 }
 279
 280 void deleteChain(char *chain) {
 281         char str[STRING_SIZE];
 282
 283         sprintf(str, "/sbin/iptables -X %sINPUT", chain);
 284         executeCommand(str);
 285 }
 286
 287 void deleteAllChains(void) {
 288         // not an elegant solution, but to avoid timing problems with undeleted chain references
 289         deleteChainReference(OVPNRED);
 290         deleteChainReference(OVPNBLUE);
 291         deleteChainReference(OVPNORANGE);
 292         flushChainINPUT(OVPNRED);
 293         flushChainINPUT(OVPNBLUE);
 294         flushChainINPUT(OVPNORANGE);
 295         deleteChain(OVPNRED);
 296         deleteChain(OVPNBLUE);
 297         deleteChain(OVPNORANGE);
 298
 299         // Only flush chains that are created by the firewall
 300         flushChain(OVPNBLOCK);
 301         flushChainNAT(OVPNNAT);
 302 }
 303
 304 void createChainReference(char *chain) {
 305         char str[STRING_SIZE];
 306         sprintf(str, "/sbin/iptables -I INPUT %s -j %sINPUT", "14", chain);
 307         executeCommand(str);
 308 }
 309
 310 void createChain(char *chain) {
 311         char str[STRING_SIZE];
 312         sprintf(str, "/sbin/iptables -N %sINPUT", chain);
 313         executeCommand(str);
 314 }
 315
 316 void createAllChains(void) {
 317         // create chain and chain references
 318         if (!strcmp(enableorange, "on")) {
 319                 if (strlen(orangeif) > 0) {
 320                         createChain(OVPNORANGE);
 321                         createChainReference(OVPNORANGE);
 322                 } else {
 323                         fprintf(stderr, "OpenVPN enabled on orange but no orange interface found\n");
 324                         //exit(1);
 325                 }
 326         }
 327
 328         if (!strcmp(enableblue, "on")) {
 329                 if (strlen(blueif) > 0) {
 330                         createChain(OVPNBLUE);
 331                         createChainReference(OVPNBLUE);
 332                 } else {
 333                         fprintf(stderr, "OpenVPN enabled on blue but no blue interface found\n");
 334                         //exit(1);
 335                 }
 336         }
 337
 338         if (!strcmp(enablered, "on")) {
 339                 if (strlen(redif) > 0) {
 340                         createChain(OVPNRED);
 341                         createChainReference(OVPNRED);
 342                 } else {
 343                         fprintf(stderr, "OpenVPN enabled on red but no red interface found\n");
 344                         //exit(1);
 345                 }
 346         }
 347 }
 348
 349 char* calcTransferNetAddress(const connection* conn) {
 350         char *subnetmask = strdup(conn->transfer_subnet);
 351         char *address = strsep(&subnetmask, "/");
 352
 353         if ((address == NULL) || (subnetmask == NULL)) {
 354                 goto ERROR;
 355         }
 356
 357         in_addr_t _address    = inet_addr(address);
 358         in_addr_t _subnetmask = inet_addr(subnetmask);
 359         _address &= _subnetmask;
 360
 361         if (strcmp(conn->role, "server") == 0) {
 362                 _address += 1 << 24;
 363         } else if (strcmp(conn->role, "client") == 0) {
 364                 _address += 2 << 24;
 365         } else {
 366                 goto ERROR;
 367         }
 368
 369         struct in_addr address_info;
 370         address_info.s_addr = _address;
 371
 372         return inet_ntoa(address_info);
 373
 374 ERROR:
 375         fprintf(stderr, "Could not determine transfer net address: %s\n", conn->name);
 376
 377         free(address);
 378         return NULL;
 379 }
 380
 381 char* getLocalSubnetAddress(const connection* conn) {
 382         kv = initkeyvalues();
 383         if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
 384                 fprintf(stderr, "Cannot read ethernet settings\n");
 385                 exit(1);
 386         }
 387
 388         const char *zones[] = {"GREEN", "BLUE", "ORANGE", NULL};
 389         char *zone = NULL;
 390
 391         // Get net address of the local openvpn subnet.
 392         char *subnetmask = strdup(conn->local_subnet);
 393         char *address = strsep(&subnetmask, "/");
 394
 395         if ((address == NULL) || (subnetmask == NULL)) {
 396                 goto ERROR;
 397         }
 398
 399         in_addr_t _address    = inet_addr(address);
 400         in_addr_t _subnetmask = inet_addr(subnetmask);
 401
 402         in_addr_t _netaddr    = (_address &  _subnetmask);
 403         in_addr_t _broadcast  = (_address | ~_subnetmask);
 404
 405         char zone_address_key[STRING_SIZE];
 406         char zone_address[STRING_SIZE];
 407         in_addr_t zone_addr;
 408
 409         int i = 0;
 410         while (zones[i]) {
 411                 zone = zones[i++];
 412                 snprintf(zone_address_key, STRING_SIZE, "%s_ADDRESS", zone);
 413
 414                 if (!findkey(kv, zone_address_key, zone_address))
 415                         continue;
 416
 417                 zone_addr = inet_addr(zone_address);
 418                 if ((zone_addr > _netaddr) && (zone_addr < _broadcast)) {
 419                         freekeyvalues(kv);
 420
 421                         return strdup(zone_address);
 422                 }
 423         }
 424
 425 ERROR:
 426         fprintf(stderr, "Could not determine local subnet address: %s\n", conn->name);
 427
 428         freekeyvalues(kv);
 429         return NULL;
 430 }
 431
 432 void setFirewallRules(void) {
 433         char protocol[STRING_SIZE] = "";
 434         char dport[STRING_SIZE] = "";
 435         char dovpnip[STRING_SIZE] = "";
 436
 437         kv = initkeyvalues();
 438         if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings"))
 439         {
 440                 fprintf(stderr, "Cannot read ovpn settings\n");
 441                 exit(1);
 442         }
 443
 444         /* we got one device, so lets proceed further   */
 445         if (!findkey(kv, "DDEST_PORT", dport)){
 446                 fprintf(stderr, "Cannot read DDEST_PORT\n");
 447                 exit(1);
 448         }
 449
 450         if (!findkey(kv, "DPROTOCOL", protocol)){
 451                 fprintf(stderr, "Cannot read DPROTOCOL\n");
 452                 exit(1);
 453         }
 454
 455         if (!findkey(kv, "VPN_IP", dovpnip)){
 456                 fprintf(stderr, "Cannot read VPN_IP\n");
 457         }
 458         freekeyvalues(kv);
 459
 460         // Flush all chains.
 461         flushChainINPUT(OVPNRED);
 462         flushChainINPUT(OVPNBLUE);
 463         flushChainINPUT(OVPNORANGE);
 464         flushChain(OVPNBLOCK);
 465         flushChainNAT(OVPNNAT);
 466
 467         // set firewall rules
 468         if (!strcmp(enablered, "on") && strlen(redif))
 469                 setChainRules(OVPNRED, redif, protocol, dport);
 470         if (!strcmp(enableblue, "on") && strlen(blueif))
 471                 setChainRules(OVPNBLUE, blueif, protocol, dport);
 472         if (!strcmp(enableorange, "on") && strlen(orangeif))
 473                 setChainRules(OVPNORANGE, orangeif, protocol, dport);
 474
 475         // read connection configuration
 476         connection *conn = getConnections();
 477
 478         // set firewall rules for n2n connections
 479         char command[STRING_SIZE];
 480         char *local_subnet_address = NULL;
 481         char *transfer_subnet_address = NULL;
 482         while (conn != NULL) {
 483                 if (strcmp(conn->type, "net") == 0) {
 484                         sprintf(command, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %d -j ACCEPT",
 485                                 OVPNRED, redif, conn->proto, conn->port);
 486                         executeCommand(command);
 487
 488                         /* Block all communication from the transfer nets. */
 489                         snprintf(command, STRING_SIZE, "/sbin/iptables -A %s -s %s -j DROP",
 490                                 OVPNBLOCK, conn->transfer_subnet);
 491                         executeCommand(command);
 492
 493                         local_subnet_address = getLocalSubnetAddress(conn);
 494                         transfer_subnet_address = calcTransferNetAddress(conn);
 495
 496                         if ((local_subnet_address) && (transfer_subnet_address)) {
 497                                 snprintf(command, STRING_SIZE, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
 498                                         OVPNNAT, transfer_subnet_address, local_subnet_address);
 499                                 executeCommand(command);
 500                         }
 501                 }
 502
 503                 conn = conn->next;
 504         }
 505 }
 506
 507 void stopDaemon(void) {
 508         char command[STRING_SIZE];
 509
 510         int pid = readPidFile("/var/run/openvpn.pid");
 511         if (!pid > 0) {
 512                 exit(1);
 513         }
 514
 515         fprintf(stderr, "Killing PID %d.\n", pid);
 516         kill(pid, SIGTERM);
 517
 518         snprintf(command, STRING_SIZE - 1, "/bin/rm -f /var/run/openvpn.pid");
 519         executeCommand(command);
 520 }
 521
 522 void startDaemon(void) {
 523         char command[STRING_SIZE];
 524
 525         if (!((strcmp(enablered, "on") == 0) || (strcmp(enableblue, "on") == 0) || (strcmp(enableorange, "on") == 0))) {
 526                 fprintf(stderr, "OpenVPN is not enabled on any interface\n");
 527                 exit(1);
 528         } else {
 529                 snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
 530                 executeCommand(command);
 531                 snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config /var/ipfire/ovpn/server.conf");
 532                 executeCommand(command);
 533         }
 534 }
 535
 536 int startNet2Net(char *name) {
 537         connection *conn = NULL;
 538         connection *conn_iter;
 539
 540         conn_iter = getConnections();
 541
 542         while (conn_iter) {
 543                 if ((strcmp(conn_iter->type, "net") == 0) && (strcmp(conn_iter->name, name) == 0)) {
 544                         conn = conn_iter;
 545                         break;
 546                 }
 547                 conn_iter = conn_iter->next;
 548         }
 549
 550         if (conn == NULL) {
 551                 fprintf(stderr, "Connection not found.\n");
 552                 return 1;
 553         }
 554
 555         if (strcmp(conn->status, "on") != 0) {
 556                 fprintf(stderr, "Connection '%s' is not enabled.\n", conn->name);
 557                 return 1;
 558         }
 559
 560         fprintf(stderr, "Starting connection %s...\n", conn->name);
 561
 562         char configfile[STRING_SIZE];
 563         snprintf(configfile, STRING_SIZE - 1, CONFIG_ROOT "/ovpn/n2nconf/%s/%s.conf",
 564                 conn->name, conn->name);
 565
 566         FILE *fp = fopen(configfile, "r");
 567         if (fp == NULL) {
 568                 fprintf(stderr, "Could not find configuration file for connection '%s' at '%s'.\n",
 569                         conn->name, configfile);
 570                 return 2;
 571         }
 572         fclose(fp);
 573
 574         // Make sure all firewall rules are up to date.
 575         setFirewallRules();
 576
 577         char command[STRING_SIZE];
 578         snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
 579         executeCommand(command);
 580         snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config %s", configfile);
 581         executeCommand(command);
 582
 583         return 0;
 584 }
 585
 586 int killNet2Net(char *name) {
 587         connection *conn = NULL;
 588         connection *conn_iter;
 589
 590         conn_iter = getConnections();
 591
 592         while (conn_iter) {
 593                 if (strcmp(conn_iter->name, name) == 0) {
 594                         conn = conn_iter;
 595                         break;
 596                 }
 597                 conn_iter = conn_iter->next;
 598         }
 599
 600         if (conn == NULL) {
 601                 fprintf(stderr, "Connection not found.\n");
 602                 return 1;
 603         }
 604
 605         char pidfile[STRING_SIZE];
 606         snprintf(pidfile, STRING_SIZE - 1, "/var/run/%sn2n.pid", conn->name);
 607
 608         int pid = readPidFile(pidfile);
 609         if (!pid > 0) {
 610                 fprintf(stderr, "Could not read pid file of connection %s.", conn->name);
 611                 return 1;
 612         }
 613
 614         fprintf(stderr, "Killing connection %s (PID %d)...\n", conn->name, pid);
 615         kill(pid, SIGTERM);
 616
 617         char command[STRING_SIZE];
 618         snprintf(command, STRING_SIZE - 1, "/bin/rm -f %s", pidfile);
 619         executeCommand(command);
 620
 621         return 0;
 622 }
 623
 624 void startAllNet2Net() {
 625         int exitcode = 0, _exitcode = 0;
 626
 627         connection *conn = getConnections();
 628
 629         while(conn) {
 630                 /* Skip all connections that are not of type "net" or disabled. */
 631                 if ((strcmp(conn->type, "net") != 0) || (strcmp(conn->status, "on") != 0)) {
 632                         conn = conn->next;
 633                         continue;
 634                 }
 635
 636                 _exitcode = startNet2Net(conn->name);
 637                 conn = conn->next;
 638
 639                 if (_exitcode > exitcode) {
 640                         exitcode = _exitcode;
 641                 }
 642         }
 643
 644         exit(exitcode);
 645 }
 646
 647 void killAllNet2Net() {
 648         int exitcode = 0, _exitcode = 0;
 649
 650         connection *conn = getConnections();
 651
 652         while(conn) {
 653                 /* Skip all connections that are not of type "net". */
 654                 if (strcmp(conn->type, "net") != 0) {
 655                         conn = conn->next;
 656                         continue;
 657                 }
 658
 659                 _exitcode = killNet2Net(conn->name);
 660                 conn = conn->next;
 661
 662                 if (_exitcode > exitcode) {
 663                         exitcode = _exitcode;
 664                 }
 665         }
 666
 667         exit(exitcode);
 668 }
 669
 670 void displayopenvpn(void) {
 671         char command[STRING_SIZE];
 672
 673         snprintf(command, STRING_SIZE - 1, "/bin/killall -sSIGUSR2 openvpn");
 674         executeCommand(command);
 675 }
 676
 677 int main(int argc, char *argv[]) {
 678         if (!(initsetuid()))
 679             exit(1);
 680         if(argc < 2)
 681             usage();
 682
 683         if(argc == 3) {
 684                 ovpnInit();
 685
 686                 if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
 687                         startNet2Net(argv[2]);
 688                         return 0;
 689                 }
 690                 else if( (strcmp(argv[1], "-kn2n") == 0) || (strcmp(argv[1], "--kill-net-2-net") == 0) ) {
 691                         killNet2Net(argv[2]);
 692                         return 0;
 693                 } else {
 694                         usage();
 695                         return 1;
 696                 }
 697         }
 698         else if(argc == 2) {
 699                 if( (strcmp(argv[1], "-k") == 0) || (strcmp(argv[1], "--kill") == 0) ) {
 700                         stopDaemon();
 701                         return 0;
 702                 }
 703                 else if( (strcmp(argv[1], "-d") == 0) || (strcmp(argv[1], "--display") == 0) ) {
 704                         displayopenvpn();
 705                         return 0;
 706                 }
 707                 else if( (strcmp(argv[1], "-dcr") == 0) || (strcmp(argv[1], "--delete-chains-and-rules") == 0) ) {
 708                         deleteAllChains();
 709                         return 0;
 710                 }
 711                 else {
 712                         ovpnInit();
 713
 714                         if( (strcmp(argv[1], "-s") == 0) || (strcmp(argv[1], "--start") == 0) ) {
 715                                 deleteAllChains();
 716                                 createAllChains();
 717                                 setFirewallRules();
 718                                 startDaemon();
 719                                 return 0;
 720                         }
 721                         else if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
 722                                 startAllNet2Net();
 723                                 return 0;
 724                         }
 725                         else if( (strcmp(argv[1], "-kn2n") == 0) || (strcmp(argv[1], "--kill-net-2-net") == 0) ) {
 726                                 killAllNet2Net();
 727                                 return 0;
 728                         }
 729                         else if( (strcmp(argv[1], "-sdo") == 0) || (strcmp(argv[1], "--start-daemon-only") == 0) ) {
 730                                 startDaemon();
 731                                 return 0;
 732                         }
 733                         else if( (strcmp(argv[1], "-r") == 0) || (strcmp(argv[1], "--restart") == 0) ) {
 734                                 stopDaemon();
 735                                 deleteAllChains();
 736                                 createAllChains();
 737                                 setFirewallRules();
 738                                 startDaemon();
 739                                 return 0;
 740                         }
 741                         else if( (strcmp(argv[1], "-fwr") == 0) || (strcmp(argv[1], "--firewall-rules") == 0) ) {
 742                                 deleteAllChains();
 743                                 createAllChains();
 744                                 setFirewallRules();
 745                                 return 0;
 746                         }
 747                         else if( (strcmp(argv[1], "-ccr") == 0) || (strcmp(argv[1], "--create-chains-and-rules") == 0) ) {
 748                                 createAllChains();
 749                                 setFirewallRules();
 750                                 return 0;
 751                         }
 752                         else {
 753                                 usage();
 754                                 return 0;
 755                         }
 756                 }
 757         }
 758         else {
 759                 usage();
 760                 return 0;
 761         }
 762 return 0;
 763 }
 764