src/misc-progs/openvpnctrl.c

   1 #define _XOPEN_SOURCE 500
   2 #include <signal.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <unistd.h>
   6 #include <stdlib.h>
   7 #include <sys/types.h>
   8 #include <arpa/inet.h>
   9 #include <netinet/in.h>
  10 #include <fcntl.h>
  11 #include <ftw.h>
  12 #include "setuid.h"
  13 #include "netutil.h"
  14 #include "libsmooth.h"
  15
  16 #define noovpndebug
  17
  18 // global vars
  19         struct keyvalue *kv = NULL;
  20         FILE *ifacefile = NULL;
  21
  22 char redif[STRING_SIZE];
  23 char blueif[STRING_SIZE];
  24 char orangeif[STRING_SIZE];
  25 char enablered[STRING_SIZE] = "off";
  26 char enableblue[STRING_SIZE] = "off";
  27 char enableorange[STRING_SIZE] = "off";
  28
  29 // consts
  30 char OVPNINPUT[STRING_SIZE] = "OVPNINPUT";
  31 char OVPNBLOCK[STRING_SIZE] = "OVPNBLOCK";
  32 char OVPNNAT[STRING_SIZE] = "OVPNNAT";
  33 char WRAPPERVERSION[STRING_SIZE] = "ipfire-2.2.4";
  34
  35 struct connection_struct {
  36         char name[STRING_SIZE];
  37         char type[STRING_SIZE];
  38         char proto[STRING_SIZE];
  39         char status[STRING_SIZE];
  40         char local_subnet[STRING_SIZE];
  41         char transfer_subnet[STRING_SIZE];
  42         char role[STRING_SIZE];
  43         char port[STRING_SIZE];
  44         struct connection_struct *next;
  45 };
  46
  47 typedef struct connection_struct connection;
  48
  49 static int recursive_remove_callback(const char* fpath, const struct stat* sb, int typeflag, struct FTW* ftwbuf) {
  50         int rv = remove(fpath);
  51         if (rv)
  52                 perror(fpath);
  53
  54         return rv;
  55 }
  56
  57 static int recursive_remove(const char* path) {
  58         return nftw(path, recursive_remove_callback, 64, FTW_DEPTH | FTW_PHYS);
  59 }
  60
  61 void exithandler(void)
  62 {
  63         if(kv)
  64                 freekeyvalues(kv);
  65         if (ifacefile)
  66                 fclose(ifacefile);
  67 }
  68
  69 void usage(void)
  70 {
  71 #ifdef ovpndebug
  72         printf("Wrapper for OpenVPN %s-debug\n", WRAPPERVERSION);
  73 #else
  74         printf("Wrapper for OpenVPN %s\n", WRAPPERVERSION);
  75 #endif
  76         printf("openvpnctrl <option>\n");
  77         printf(" Valid options are:\n");
  78         printf(" -s   --start\n");
  79         printf("      starts OpenVPN (implicitly creates chains and firewall rules)\n");
  80         printf(" -k   --kill\n");
  81         printf("      kills/stops OpenVPN\n");
  82         printf(" -r   --restart\n");
  83         printf("      restarts OpenVPN (implicitly creates chains and firewall rules)\n");
  84         printf(" -sn2n --start-net-2-net\n");
  85         printf("      starts all net2net connections\n");
  86         printf("      you may pass a connection name to the switch to only start a specific one\n");
  87         printf(" -kn2n --kill-net-2-net\n");
  88         printf("      kills all net2net connections\n");
  89         printf("      you may pass a connection name to the switch to only start a specific one\n");
  90         printf(" -drrd --delete-rrd\n");
  91         printf("      Deletes the RRD data for a specific client\n");
  92         printf("      you need to pass a connection name (RW) to the switch to delete the directory (case sensitive)\n");
  93         printf(" -d   --display\n");
  94         printf("      displays OpenVPN status to syslog\n");
  95         printf(" -fwr --firewall-rules\n");
  96         printf("      removes current OpenVPN chains and rules and resets them according to the config\n");
  97         printf(" -sdo --start-daemon-only\n");
  98         printf("      starts OpenVPN daemon only\n");
  99         exit(1);
 100 }
 101
 102 connection *getConnections() {
 103         FILE *fp = NULL;
 104
 105         if (!(fp = fopen(CONFIG_ROOT "/ovpn/ovpnconfig", "r"))) {
 106                 fprintf(stderr, "Could not open openvpn n2n configuration file.\n");
 107                 exit(1);
 108         }
 109
 110         char line[STRING_SIZE] = "";
 111         char result[STRING_SIZE] = "";
 112         char *resultptr;
 113         int count;
 114         connection *conn_first = NULL;
 115         connection *conn_last = NULL;
 116         connection *conn_curr;
 117
 118         while ((fgets(line, STRING_SIZE, fp) != NULL)) {
 119                 if (line[strlen(line) - 1] == '\n')
 120                         line[strlen(line) - 1] = '\0';
 121
 122                 conn_curr = (connection *)malloc(sizeof(connection));
 123                 memset(conn_curr, 0, sizeof(connection));
 124
 125                 if (conn_first == NULL) {
 126                         conn_first = conn_curr;
 127                 } else {
 128                         conn_last->next = conn_curr;
 129                 }
 130                 conn_last = conn_curr;
 131
 132                 count = 0;
 133                 char *lineptr = &line;
 134                 while (1) {
 135                         if (*lineptr == NULL)
 136                                 break;
 137
 138                         resultptr = result;
 139                         while (*lineptr != NULL) {
 140                                 if (*lineptr == ',') {
 141                                         lineptr++;
 142                                         break;
 143                                 }
 144                                 *resultptr++ = *lineptr++;
 145                         }
 146                         *resultptr = '\0';
 147
 148                         if (count == 1) {
 149                                 strcpy(conn_curr->status, result);
 150                         } else if (count == 2) {
 151                                 strcpy(conn_curr->name, result);
 152                         } else if (count == 4) {
 153                                 strcpy(conn_curr->type, result);
 154                         } else if (count == 7) {
 155                                 strcpy(conn_curr->role, result);
 156                         } else if (count == 9) {
 157                                 strcpy(conn_curr->local_subnet, result);
 158                         } else if (count == 28) {
 159                                 strcpy(conn_curr->transfer_subnet, result);
 160                         } else if (count == 29) {
 161                                 strcpy(conn_curr->proto, result);
 162                         } else if (count == 30) {
 163                                 strcpy(conn_curr->port, result);
 164                         }
 165
 166                         count++;
 167                 }
 168         }
 169
 170         fclose(fp);
 171
 172         return conn_first;
 173 }
 174
 175 int readPidFile(const char *pidfile) {
 176         FILE *fp = fopen(pidfile, "r");
 177         if (fp == NULL) {
 178                 exit(1);
 179         }
 180
 181         int pid = 0;
 182         fscanf(fp, "%d", &pid);
 183         fclose(fp);
 184
 185         return pid;
 186 }
 187
 188 int readExternalAddress(char* address) {
 189         FILE *fp = fopen("/var/ipfire/red/local-ipaddress", "r");
 190         if (!fp)
 191                 goto ERROR;
 192
 193         int r = fscanf(fp, "%s", address);
 194         fclose(fp);
 195
 196         if (r < 0)
 197                 goto ERROR;
 198
 199         /* In case the read IP address is not valid, we empty
 200          * the content of address and return non-zero. */
 201         if (!VALID_IP(address))
 202                 goto ERROR;
 203
 204         return 0;
 205
 206 ERROR:
 207         address = NULL;
 208         return 1;
 209 }
 210
 211 void ovpnInit(void) {
 212         // Read OpenVPN configuration
 213         kv = initkeyvalues();
 214         if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings")) {
 215                 fprintf(stderr, "Cannot read ovpn settings\n");
 216                 exit(1);
 217         }
 218
 219         if (!findkey(kv, "ENABLED", enablered)) {
 220                 exit(1);
 221         }
 222
 223         if (!findkey(kv, "ENABLED_BLUE", enableblue)){
 224                 exit(1);
 225         }
 226
 227         if (!findkey(kv, "ENABLED_ORANGE", enableorange)){
 228                 exit(1);
 229         }
 230         freekeyvalues(kv);
 231
 232         // read interface settings
 233
 234         // details for the red int
 235         memset(redif, 0, STRING_SIZE);
 236         if ((ifacefile = fopen(CONFIG_ROOT "/red/iface", "r")))
 237         {
 238                 if (fgets(redif, STRING_SIZE, ifacefile))
 239                 {
 240                         if (redif[strlen(redif) - 1] == '\n')
 241                                 redif[strlen(redif) - 1] = '\0';
 242                 }
 243                 fclose (ifacefile);
 244                 ifacefile = NULL;
 245
 246                 if (!VALID_DEVICE(redif))
 247                 {
 248                         memset(redif, 0, STRING_SIZE);
 249                 }
 250         }
 251
 252         kv=initkeyvalues();
 253         if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
 254                 fprintf(stderr, "Cannot read ethernet settings\n");
 255                 exit(1);
 256         }
 257
 258         if (strcmp(enableblue, "on") == 0) {
 259                 if (!findkey(kv, "BLUE_DEV", blueif)) {
 260                         exit(1);
 261                 }
 262         }
 263
 264         if (strcmp(enableorange, "on") == 0) {
 265                 if (!findkey(kv, "ORANGE_DEV", orangeif)) {
 266                         exit(1);
 267                 }
 268         }
 269         freekeyvalues(kv);
 270 }
 271
 272 void executeCommand(char *command) {
 273 #ifdef ovpndebug
 274         printf(strncat(command, "\n", 2));
 275 #endif
 276         safe_system(strncat(command, " >/dev/null 2>&1", 17));
 277 }
 278
 279 void addRule(const char *chain, const char *interface, const char *protocol, const char *port) {
 280         char command[STRING_SIZE];
 281
 282         snprintf(command, STRING_SIZE - 1, "/sbin/iptables -A %s -i %s -p %s --dport %s -j ACCEPT",
 283                 chain, interface, protocol, port);
 284         executeCommand(command);
 285 }
 286
 287 void flushChain(char *chain) {
 288         char str[STRING_SIZE];
 289
 290         snprintf(str, STRING_SIZE - 1, "/sbin/iptables -F %s", chain);
 291         executeCommand(str);
 292 }
 293
 294 void flushChainNAT(char *chain) {
 295         char str[STRING_SIZE];
 296
 297         snprintf(str, STRING_SIZE - 1, "/sbin/iptables -t nat -F %s", chain);
 298         executeCommand(str);
 299 }
 300
 301 char* calcTransferNetAddress(const connection* conn) {
 302         char *subnetmask = strdup(conn->transfer_subnet);
 303         char *address = strsep(&subnetmask, "/");
 304
 305         if ((address == NULL) || (subnetmask == NULL)) {
 306                 goto ERROR;
 307         }
 308
 309         in_addr_t _address    = inet_addr(address);
 310         in_addr_t _subnetmask = inet_addr(subnetmask);
 311         _address &= _subnetmask;
 312
 313         if (strcmp(conn->role, "server") == 0) {
 314                 _address += 1 << 24;
 315         } else if (strcmp(conn->role, "client") == 0) {
 316                 _address += 2 << 24;
 317         } else {
 318                 goto ERROR;
 319         }
 320
 321         struct in_addr address_info;
 322         address_info.s_addr = _address;
 323
 324         return inet_ntoa(address_info);
 325
 326 ERROR:
 327         fprintf(stderr, "Could not determine transfer net address: %s\n", conn->name);
 328
 329         free(address);
 330         return NULL;
 331 }
 332
 333 char* getLocalSubnetAddress(const connection* conn) {
 334         kv = initkeyvalues();
 335         if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
 336                 fprintf(stderr, "Cannot read ethernet settings\n");
 337                 exit(1);
 338         }
 339
 340         const char *zones[] = {"GREEN", "BLUE", "ORANGE", NULL};
 341         char *zone = NULL;
 342
 343         // Get net address of the local openvpn subnet.
 344         char *subnetmask = strdup(conn->local_subnet);
 345         char *address = strsep(&subnetmask, "/");
 346
 347         if ((address == NULL) || (subnetmask == NULL)) {
 348                 goto ERROR;
 349         }
 350
 351         in_addr_t _address    = inet_addr(address);
 352         in_addr_t _subnetmask = inet_addr(subnetmask);
 353
 354         in_addr_t _netaddr    = (_address &  _subnetmask);
 355         in_addr_t _broadcast  = (_address | ~_subnetmask);
 356
 357         char zone_address_key[STRING_SIZE];
 358         char zone_address[STRING_SIZE];
 359         in_addr_t zone_addr;
 360
 361         int i = 0;
 362         while (zones[i]) {
 363                 zone = zones[i++];
 364                 snprintf(zone_address_key, STRING_SIZE, "%s_ADDRESS", zone);
 365
 366                 if (!findkey(kv, zone_address_key, zone_address))
 367                         continue;
 368
 369                 zone_addr = inet_addr(zone_address);
 370                 if ((zone_addr > _netaddr) && (zone_addr < _broadcast)) {
 371                         freekeyvalues(kv);
 372
 373                         return strdup(zone_address);
 374                 }
 375         }
 376
 377 ERROR:
 378         fprintf(stderr, "Could not determine local subnet address: %s\n", conn->name);
 379
 380         freekeyvalues(kv);
 381         return NULL;
 382 }
 383
 384 void setFirewallRules(void) {
 385         char command[STRING_SIZE];
 386         char protocol[STRING_SIZE] = "";
 387         char dport[STRING_SIZE] = "";
 388         char dovpnip[STRING_SIZE] = "";
 389
 390         kv = initkeyvalues();
 391         if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings"))
 392         {
 393                 fprintf(stderr, "Cannot read ovpn settings\n");
 394                 exit(1);
 395         }
 396
 397         /* we got one device, so lets proceed further   */
 398         if (!findkey(kv, "DDEST_PORT", dport)){
 399                 fprintf(stderr, "Cannot read DDEST_PORT\n");
 400                 exit(1);
 401         }
 402
 403         if (!findkey(kv, "DPROTOCOL", protocol)){
 404                 fprintf(stderr, "Cannot read DPROTOCOL\n");
 405                 exit(1);
 406         }
 407
 408         if (!findkey(kv, "VPN_IP", dovpnip)){
 409                 fprintf(stderr, "Cannot read VPN_IP\n");
 410         }
 411         freekeyvalues(kv);
 412
 413         // Flush all chains.
 414         flushChain(OVPNINPUT);
 415         flushChain(OVPNBLOCK);
 416         flushChainNAT(OVPNNAT);
 417
 418         // set firewall rules
 419         if (!strcmp(enablered, "on") && strlen(redif))
 420                 addRule(OVPNINPUT, redif, protocol, dport);
 421         if (!strcmp(enableblue, "on") && strlen(blueif))
 422                 addRule(OVPNINPUT, blueif, protocol, dport);
 423         if (!strcmp(enableorange, "on") && strlen(orangeif))
 424                 addRule(OVPNINPUT, orangeif, protocol, dport);
 425
 426         /* Allow ICMP error messages to pass. */
 427         snprintf(command, STRING_SIZE - 1, "/sbin/iptables -A %s -p icmp"
 428                 " -m conntrack --ctstate RELATED -j RETURN", OVPNBLOCK);
 429         executeCommand(command);
 430
 431         // read connection configuration
 432         connection *conn = getConnections();
 433
 434         // set firewall rules for n2n connections
 435         char *local_subnet_address = NULL;
 436         char *transfer_subnet_address = NULL;
 437         while (conn != NULL) {
 438                 if (strcmp(conn->type, "net") == 0) {
 439                         addRule(OVPNINPUT, redif, conn->proto, conn->port);
 440
 441                         /* Block all communication from the transfer nets. */
 442                         snprintf(command, STRING_SIZE - 1, "/sbin/iptables -A %s -s %s -j DROP",
 443                                 OVPNBLOCK, conn->transfer_subnet);
 444                         executeCommand(command);
 445
 446                         local_subnet_address = getLocalSubnetAddress(conn);
 447                         transfer_subnet_address = calcTransferNetAddress(conn);
 448
 449                         if ((local_subnet_address) && (transfer_subnet_address)) {
 450                                 snprintf(command, STRING_SIZE - 1, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
 451                                         OVPNNAT, transfer_subnet_address, local_subnet_address);
 452                                 executeCommand(command);
 453                         }
 454                 }
 455
 456                 conn = conn->next;
 457         }
 458 }
 459
 460 void stopDaemon(void) {
 461         char command[STRING_SIZE];
 462
 463         int pid = readPidFile("/var/run/openvpn.pid");
 464         if (!pid > 0) {
 465                 exit(1);
 466         }
 467
 468         fprintf(stderr, "Killing PID %d.\n", pid);
 469         kill(pid, SIGTERM);
 470
 471         snprintf(command, STRING_SIZE - 1, "/bin/rm -f /var/run/openvpn.pid");
 472         executeCommand(command);
 473 }
 474
 475 void startDaemon(void) {
 476         char command[STRING_SIZE];
 477
 478         if (!((strcmp(enablered, "on") == 0) || (strcmp(enableblue, "on") == 0) || (strcmp(enableorange, "on") == 0))) {
 479                 fprintf(stderr, "OpenVPN is not enabled on any interface\n");
 480                 exit(1);
 481         } else {
 482                 snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
 483                 executeCommand(command);
 484                 snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config /var/ipfire/ovpn/server.conf");
 485                 executeCommand(command);
 486                 snprintf(command, STRING_SIZE-1, "/bin/chown root.nobody /var/run/ovpnserver.log");
 487                 executeCommand(command);
 488                 snprintf(command, STRING_SIZE-1, "/bin/chmod 644 /var/run/ovpnserver.log");
 489                 executeCommand(command);
 490         }
 491 }
 492
 493 int startNet2Net(char *name) {
 494         connection *conn = NULL;
 495         connection *conn_iter;
 496
 497         conn_iter = getConnections();
 498
 499         while (conn_iter) {
 500                 if ((strcmp(conn_iter->type, "net") == 0) && (strcmp(conn_iter->name, name) == 0)) {
 501                         conn = conn_iter;
 502                         break;
 503                 }
 504                 conn_iter = conn_iter->next;
 505         }
 506
 507         if (conn == NULL) {
 508                 fprintf(stderr, "Connection not found.\n");
 509                 return 1;
 510         }
 511
 512         if (strcmp(conn->status, "on") != 0) {
 513                 fprintf(stderr, "Connection '%s' is not enabled.\n", conn->name);
 514                 return 1;
 515         }
 516
 517         fprintf(stderr, "Starting connection %s...\n", conn->name);
 518
 519         char configfile[STRING_SIZE];
 520         snprintf(configfile, STRING_SIZE - 1, CONFIG_ROOT "/ovpn/n2nconf/%s/%s.conf",
 521                 conn->name, conn->name);
 522
 523         FILE *fp = fopen(configfile, "r");
 524         if (fp == NULL) {
 525                 fprintf(stderr, "Could not find configuration file for connection '%s' at '%s'.\n",
 526                         conn->name, configfile);
 527                 return 2;
 528         }
 529         fclose(fp);
 530
 531         // Make sure all firewall rules are up to date.
 532         setFirewallRules();
 533
 534         // Get the external IP address.
 535         char address[STRING_SIZE] = "";
 536         int r = readExternalAddress(address);
 537         if (r) {
 538                 fprintf(stderr, "Could not read the external address\n");
 539                 exit(1);
 540         }
 541
 542         char command[STRING_SIZE];
 543         snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
 544         executeCommand(command);
 545         snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --local %s --config %s", address, configfile);
 546         executeCommand(command);
 547
 548         return 0;
 549 }
 550
 551 int killNet2Net(char *name) {
 552         connection *conn = NULL;
 553         connection *conn_iter;
 554         int rc = 0;
 555
 556         conn_iter = getConnections();
 557
 558         while (conn_iter) {
 559                 if (strcmp(conn_iter->name, name) == 0) {
 560                         conn = conn_iter;
 561                         break;
 562                 }
 563                 conn_iter = conn_iter->next;
 564         }
 565
 566         if (conn == NULL) {
 567                 fprintf(stderr, "Connection not found.\n");
 568                 return 1;
 569         }
 570
 571         char pidfile[STRING_SIZE];
 572         snprintf(pidfile, STRING_SIZE - 1, "/var/run/%sn2n.pid", conn->name);
 573
 574         int pid = readPidFile(pidfile);
 575         if (!pid > 0) {
 576                 fprintf(stderr, "Could not read pid file of connection %s.", conn->name);
 577                 return 1;
 578         }
 579
 580         fprintf(stderr, "Killing connection %s (PID %d)...\n", conn->name, pid);
 581         kill(pid, SIGTERM);
 582
 583         char command[STRING_SIZE];
 584         snprintf(command, STRING_SIZE - 1, "/bin/rm -f %s", pidfile);
 585         executeCommand(command);
 586
 587         char runfile[STRING_SIZE];
 588         snprintf(runfile, STRING_SIZE - 1, "/var/run/openvpn/%s-n2n", conn->name);
 589         rc = recursive_remove(runfile);
 590         if (rc)
 591                 perror(runfile);
 592
 593         return 0;
 594 }
 595
 596 int deleterrd(char *name) {
 597         char rrd_dir[STRING_SIZE];
 598
 599         connection *conn = getConnections();
 600         while(conn) {
 601                 if (strcmp(conn->name, name) != 0) {
 602                         conn = conn->next;
 603                         continue;
 604                 }
 605
 606                 // Handle RW connections
 607                 if (strcmp(conn->type, "host") == 0) {
 608                         snprintf(rrd_dir, STRING_SIZE - 1, "/var/log/rrd/collectd/localhost/openvpn-%s/", name);
 609
 610                 // Handle N2N connections
 611                 } else if (strcmp(conn->type, "net") == 0) {
 612                         snprintf(rrd_dir, STRING_SIZE - 1, "/var/log/rrd/collectd/localhost/openvpn-%s-n2n/", name);
 613
 614                 // Unhandled connection type
 615                 } else {
 616                         conn = conn->next;
 617                         continue;
 618                 }
 619
 620                 return recursive_remove(rrd_dir);
 621         }
 622
 623         return 1;
 624 }
 625
 626 void startAllNet2Net() {
 627         int exitcode = 0, _exitcode = 0;
 628
 629         connection *conn = getConnections();
 630
 631         while(conn) {
 632                 /* Skip all connections that are not of type "net" or disabled. */
 633                 if ((strcmp(conn->type, "net") != 0) || (strcmp(conn->status, "on") != 0)) {
 634                         conn = conn->next;
 635                         continue;
 636                 }
 637
 638                 _exitcode = startNet2Net(conn->name);
 639                 conn = conn->next;
 640
 641                 if (_exitcode > exitcode) {
 642                         exitcode = _exitcode;
 643                 }
 644         }
 645
 646         exit(exitcode);
 647 }
 648
 649 void killAllNet2Net() {
 650         int exitcode = 0, _exitcode = 0;
 651
 652         connection *conn = getConnections();
 653
 654         while(conn) {
 655                 /* Skip all connections that are not of type "net". */
 656                 if (strcmp(conn->type, "net") != 0) {
 657                         conn = conn->next;
 658                         continue;
 659                 }
 660
 661                 _exitcode = killNet2Net(conn->name);
 662                 conn = conn->next;
 663
 664                 if (_exitcode > exitcode) {
 665                         exitcode = _exitcode;
 666                 }
 667         }
 668
 669         exit(exitcode);
 670 }
 671
 672 void displayopenvpn(void) {
 673         char command[STRING_SIZE];
 674
 675         snprintf(command, STRING_SIZE - 1, "/bin/killall -sSIGUSR2 openvpn");
 676         executeCommand(command);
 677 }
 678
 679 int main(int argc, char *argv[]) {
 680         if (!(initsetuid()))
 681             exit(1);
 682         if(argc < 2)
 683             usage();
 684
 685         if(argc == 3) {
 686                 ovpnInit();
 687
 688                 if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
 689                         startNet2Net(argv[2]);
 690                         return 0;
 691                 }
 692                 else if( (strcmp(argv[1], "-kn2n") == 0) || (strcmp(argv[1], "--kill-net-2-net") == 0) ) {
 693                         killNet2Net(argv[2]);
 694                         return 0;
 695                 }
 696                 else if( (strcmp(argv[1], "-drrd") == 0) || (strcmp(argv[1], "--delete-rrd") == 0) ) {
 697                         deleterrd(argv[2]);
 698                         return 0;
 699                 } else {
 700                         usage();
 701                         return 1;
 702                 }
 703         }
 704         else if(argc == 2) {
 705                 if( (strcmp(argv[1], "-k") == 0) || (strcmp(argv[1], "--kill") == 0) ) {
 706                         stopDaemon();
 707                         return 0;
 708                 }
 709                 else if( (strcmp(argv[1], "-d") == 0) || (strcmp(argv[1], "--display") == 0) ) {
 710                         displayopenvpn();
 711                         return 0;
 712                 }
 713                 else {
 714                         ovpnInit();
 715
 716                         if( (strcmp(argv[1], "-s") == 0) || (strcmp(argv[1], "--start") == 0) ) {
 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                                 setFirewallRules();
 736                                 startDaemon();
 737                                 return 0;
 738                         }
 739                         else if( (strcmp(argv[1], "-fwr") == 0) || (strcmp(argv[1], "--firewall-rules") == 0) ) {
 740                                 setFirewallRules();
 741                                 return 0;
 742                         }
 743                         else {
 744                                 usage();
 745                                 return 0;
 746                         }
 747                 }
 748         }
 749         else {
 750                 usage();
 751                 return 0;
 752         }
 753 return 0;
 754 }
 755