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                 fprintf(stderr, "PID file not found: '%s'\n", pidfile);
 167                 exit(1);
 168         }
 169
 170         int pid = 0;
 171         fscanf(fp, "%d", &pid);
 172         fclose(fp);
 173
 174         return pid;
 175 }
 176
 177 void ovpnInit(void) {
 178
 179         // Read OpenVPN configuration
 180         kv = initkeyvalues();
 181         if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings")) {
 182                 fprintf(stderr, "Cannot read ovpn settings\n");
 183                 exit(1);
 184         }
 185
 186         if (!findkey(kv, "ENABLED", enablered)) {
 187                 fprintf(stderr, "Cannot read ENABLED\n");
 188                 exit(1);
 189         }
 190
 191         if (!findkey(kv, "ENABLED_BLUE", enableblue)){
 192                 fprintf(stderr, "Cannot read ENABLED_BLUE\n");
 193                 exit(1);
 194         }
 195
 196         if (!findkey(kv, "ENABLED_ORANGE", enableorange)){
 197                 fprintf(stderr, "Cannot read ENABLED_ORANGE\n");
 198                 exit(1);
 199         }
 200         freekeyvalues(kv);
 201
 202         // read interface settings
 203
 204         // details for the red int
 205         memset(redif, 0, STRING_SIZE);
 206         if ((ifacefile = fopen(CONFIG_ROOT "/red/iface", "r")))
 207         {
 208                 if (fgets(redif, STRING_SIZE, ifacefile))
 209                 {
 210                         if (redif[strlen(redif) - 1] == '\n')
 211                                 redif[strlen(redif) - 1] = '\0';
 212                 }
 213                 fclose (ifacefile);
 214                 ifacefile = NULL;
 215
 216                 if (!VALID_DEVICE(redif))
 217                 {
 218                         memset(redif, 0, STRING_SIZE);
 219                 }
 220         }
 221
 222         kv=initkeyvalues();
 223         if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings"))
 224         {
 225                 fprintf(stderr, "Cannot read ethernet settings\n");
 226                 exit(1);
 227         }
 228
 229         if (strcmp(enableblue, "on")==0){
 230                 if (!findkey(kv, "BLUE_DEV", blueif)){
 231                         fprintf(stderr, "Cannot read BLUE_DEV\n");
 232                         exit(1);
 233                 }
 234         }
 235         if (strcmp(enableorange, "on")==0){
 236                 if (!findkey(kv, "ORANGE_DEV", orangeif)){
 237                         fprintf(stderr, "Cannot read ORNAGE_DEV\n");
 238                         exit(1);
 239                 }
 240         }
 241         freekeyvalues(kv);
 242 }
 243
 244 void executeCommand(char *command) {
 245 #ifdef ovpndebug
 246         printf(strncat(command, "\n", 2));
 247 #endif
 248         safe_system(strncat(command, " >/dev/null 2>&1", 17));
 249 }
 250
 251 void setChainRules(char *chain, char *interface, char *protocol, char *port)
 252 {
 253         char str[STRING_SIZE];
 254
 255         sprintf(str, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %s -j ACCEPT", chain, interface, protocol, port);
 256         executeCommand(str);
 257 }
 258
 259 void flushChain(char *chain) {
 260         char str[STRING_SIZE];
 261
 262         sprintf(str, "/sbin/iptables -F %sINPUT", chain);
 263         executeCommand(str);
 264 }
 265
 266 void flushChainNAT(char *chain) {
 267         char str[STRING_SIZE];
 268
 269         sprintf(str, "/sbin/iptables -t nat -F %s", chain);
 270         executeCommand(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         flushChain(OVPNRED);
 293         flushChain(OVPNBLUE);
 294         flushChain(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)) {
 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)) {
 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)) {
 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 //              exit(1); step further as we don't need an ip
 458         }
 459         freekeyvalues(kv);
 460
 461         // Flush all chains.
 462         flushChain(OVPNRED);
 463         flushChain(OVPNBLUE);
 464         flushChain(OVPNORANGE);
 465         flushChain(OVPNBLOCK);
 466         flushChainNAT(OVPNNAT);
 467
 468         // set firewall rules
 469         if (!strcmp(enablered, "on") && strlen(redif))
 470                 setChainRules(OVPNRED, redif, protocol, dport);
 471         if (!strcmp(enableblue, "on") && strlen(blueif))
 472                 setChainRules(OVPNBLUE, blueif, protocol, dport);
 473         if (!strcmp(enableorange, "on") && strlen(orangeif))
 474                 setChainRules(OVPNORANGE, orangeif, protocol, dport);
 475
 476         // read connection configuration
 477         connection *conn = getConnections();
 478
 479         // set firewall rules for n2n connections
 480         char command[STRING_SIZE];
 481         char *local_subnet_address = NULL;
 482         char *transfer_subnet_address = NULL;
 483         while (conn != NULL) {
 484                 if (strcmp(conn->type, "net") == 0) {
 485                         sprintf(command, "/sbin/iptables -A %sINPUT -i %s -p %s --dport %d -j ACCEPT",
 486                                 OVPNRED, redif, conn->proto, conn->port);
 487                         executeCommand(command);
 488
 489                         /* Block all communication from the transfer nets. */
 490                         snprintf(command, STRING_SIZE, "/sbin/iptables -A %s -s %s -j DROP",
 491                                 OVPNBLOCK, conn->transfer_subnet);
 492                         executeCommand(command);
 493
 494                         local_subnet_address = getLocalSubnetAddress(conn);
 495                         transfer_subnet_address = calcTransferNetAddress(conn);
 496
 497                         if ((local_subnet_address) && (transfer_subnet_address)) {
 498                                 snprintf(command, STRING_SIZE, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
 499                                         OVPNNAT, transfer_subnet_address, local_subnet_address);
 500                                 executeCommand(command);
 501                         }
 502                 }
 503
 504                 conn = conn->next;
 505         }
 506 }
 507
 508 void stopDaemon(void) {
 509         char command[STRING_SIZE];
 510
 511         int pid = readPidFile("/var/run/openvpn.pid");
 512         if (!pid > 0) {
 513                 exit(1);
 514         }
 515
 516         fprintf(stderr, "Killing PID %d.\n", pid);
 517         kill(pid, SIGTERM);
 518
 519         snprintf(command, STRING_SIZE - 1, "/bin/rm -f /var/run/openvpn.pid");
 520         executeCommand(command);
 521 }
 522
 523 void startDaemon(void) {
 524         char command[STRING_SIZE];
 525
 526         if (!((strcmp(enablered, "on")==0) || (strcmp(enableblue, "on")==0) || (strcmp(enableorange, "on")==0))){
 527                 fprintf(stderr, "OpenVPN is not enabled on any interface\n");
 528                 exit(1);
 529         } else {
 530                 snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
 531                 executeCommand(command);
 532                 snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config /var/ipfire/ovpn/server.conf");
 533                 executeCommand(command);
 534         }
 535 }
 536
 537 int startNet2Net(char *name) {
 538         connection *conn = NULL;
 539         connection *conn_iter;
 540
 541         conn_iter = getConnections();
 542
 543         while (conn_iter) {
 544                 if ((strcmp(conn_iter->type, "net") == 0) && (strcmp(conn_iter->name, name) == 0)) {
 545                         conn = conn_iter;
 546                         break;
 547                 }
 548                 conn_iter = conn_iter->next;
 549         }
 550
 551         if (conn == NULL) {
 552                 fprintf(stderr, "Connection not found.\n");
 553                 return 1;
 554         }
 555
 556         if (strcmp(conn->status, "on") != 0) {
 557                 fprintf(stderr, "Connection '%s' is not enabled.\n", conn->name);
 558                 return 1;
 559         }
 560
 561         fprintf(stderr, "Starting connection %s...\n", conn->name);
 562
 563         char configfile[STRING_SIZE];
 564         snprintf(configfile, STRING_SIZE - 1, CONFIG_ROOT "/ovpn/n2nconf/%s/%s.conf",
 565                 conn->name, conn->name);
 566
 567         FILE *fp = fopen(configfile, "r");
 568         if (fp == NULL) {
 569                 fprintf(stderr, "Could not find configuration file for connection '%s' at '%s'.\n",
 570                         conn->name, configfile);
 571                 return 2;
 572         }
 573         fclose(fp);
 574
 575         // Make sure all firewall rules are up to date.
 576         setFirewallRules();
 577
 578         char command[STRING_SIZE];
 579         snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
 580         executeCommand(command);
 581         snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config %s", configfile);
 582         executeCommand(command);
 583
 584         return 0;
 585 }
 586
 587 int killNet2Net(char *name) {
 588         connection *conn = NULL;
 589         connection *conn_iter;
 590
 591         conn_iter = getConnections();
 592
 593         while (conn_iter) {
 594                 if (strcmp(conn_iter->name, name) == 0) {
 595                         conn = conn_iter;
 596                         break;
 597                 }
 598                 conn_iter = conn_iter->next;
 599         }
 600
 601         if (conn == NULL) {
 602                 fprintf(stderr, "Connection not found.\n");
 603                 return 1;
 604         }
 605
 606         char pidfile[STRING_SIZE];
 607         snprintf(pidfile, STRING_SIZE - 1, "/var/run/%sn2n.pid", conn->name);
 608
 609         int pid = readPidFile(pidfile);
 610         if (!pid > 0) {
 611                 fprintf(stderr, "Could not read pid file of connection %s.", conn->name);
 612                 return 1;
 613         }
 614
 615         fprintf(stderr, "Killing connection %s (PID %d)...\n", conn->name, pid);
 616         kill(pid, SIGTERM);
 617
 618         char command[STRING_SIZE];
 619         snprintf(command, STRING_SIZE - 1, "/bin/rm -f %s", pidfile);
 620         executeCommand(command);
 621
 622         return 0;
 623 }
 624
 625 void startAllNet2Net() {
 626         int exitcode = 0, _exitcode = 0;
 627
 628         connection *conn = getConnections();
 629
 630         while(conn) {
 631                 /* Skip all connections that are not of type "net" or disabled. */
 632                 if ((strcmp(conn->type, "net") != 0) || (strcmp(conn->status, "on") != 0)) {
 633                         conn = conn->next;
 634                         continue;
 635                 }
 636
 637                 _exitcode = startNet2Net(conn->name);
 638                 conn = conn->next;
 639
 640                 if (_exitcode > exitcode) {
 641                         exitcode = _exitcode;
 642                 }
 643         }
 644
 645         exit(exitcode);
 646 }
 647
 648 void killAllNet2Net() {
 649         int exitcode = 0, _exitcode = 0;
 650
 651         connection *conn = getConnections();
 652
 653         while(conn) {
 654                 /* Skip all connections that are not of type "net". */
 655                 if (strcmp(conn->type, "net") != 0) {
 656                         conn = conn->next;
 657                         continue;
 658                 }
 659
 660                 _exitcode = killNet2Net(conn->name);
 661                 conn = conn->next;
 662
 663                 if (_exitcode > exitcode) {
 664                         exitcode = _exitcode;
 665                 }
 666         }
 667
 668         exit(exitcode);
 669 }
 670
 671 void displayopenvpn(void) {
 672         char command[STRING_SIZE];
 673
 674         snprintf(command, STRING_SIZE - 1, "/bin/killall -sSIGUSR2 openvpn");
 675         executeCommand(command);
 676 }
 677
 678 int main(int argc, char *argv[]) {
 679         if (!(initsetuid()))
 680             exit(1);
 681         if(argc < 2)
 682             usage();
 683
 684         if(argc == 3) {
 685                 ovpnInit();
 686
 687                 if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
 688                         startNet2Net(argv[2]);
 689                         return 0;
 690                 }
 691                 else if( (strcmp(argv[1], "-kn2n") == 0) || (strcmp(argv[1], "--kill-net-2-net") == 0) ) {
 692                         killNet2Net(argv[2]);
 693                         return 0;
 694                 } else {
 695                         usage();
 696                         return 1;
 697                 }
 698         }
 699         else if(argc == 2) {
 700                 if( (strcmp(argv[1], "-k") == 0) || (strcmp(argv[1], "--kill") == 0) ) {
 701                         stopDaemon();
 702                         return 0;
 703                 }
 704                 else if( (strcmp(argv[1], "-d") == 0) || (strcmp(argv[1], "--display") == 0) ) {
 705                         displayopenvpn();
 706                         return 0;
 707                 }
 708                 else if( (strcmp(argv[1], "-dcr") == 0) || (strcmp(argv[1], "--delete-chains-and-rules") == 0) ) {
 709                         deleteAllChains();
 710                         return 0;
 711                 }
 712                 else {
 713                         ovpnInit();
 714
 715                         if( (strcmp(argv[1], "-s") == 0) || (strcmp(argv[1], "--start") == 0) ) {
 716                                 deleteAllChains();
 717                                 createAllChains();
 718                                 setFirewallRules();
 719                                 startDaemon();
 720                                 return 0;
 721                         }
 722                         else if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
 723                                 startAllNet2Net();
 724                                 return 0;
 725                         }
 726                         else if( (strcmp(argv[1], "-kn2n") == 0) || (strcmp(argv[1], "--kill-net-2-net") == 0) ) {
 727                                 killAllNet2Net();
 728                                 return 0;
 729                         }
 730                         else if( (strcmp(argv[1], "-sdo") == 0) || (strcmp(argv[1], "--start-daemon-only") == 0) ) {
 731                                 startDaemon();
 732                                 return 0;
 733                         }
 734                         else if( (strcmp(argv[1], "-r") == 0) || (strcmp(argv[1], "--restart") == 0) ) {
 735                                 stopDaemon();
 736                                 deleteAllChains();
 737                                 createAllChains();
 738                                 setFirewallRules();
 739                                 startDaemon();
 740                                 return 0;
 741                         }
 742                         else if( (strcmp(argv[1], "-fwr") == 0) || (strcmp(argv[1], "--firewall-rules") == 0) ) {
 743                                 deleteAllChains();
 744                                 createAllChains();
 745                                 setFirewallRules();
 746                                 return 0;
 747                         }
 748                         else if( (strcmp(argv[1], "-ccr") == 0) || (strcmp(argv[1], "--create-chains-and-rules") == 0) ) {
 749                                 createAllChains();
 750                                 setFirewallRules();
 751                                 return 0;
 752                         }
 753                         else {
 754                                 usage();
 755                                 return 0;
 756                         }
 757                 }
 758         }
 759         else {
 760                 usage();
 761                 return 0;
 762         }
 763 return 0;
 764 }
 765