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 "netutil.h"
  12 #include "libsmooth.h"
  13
  14 #define noovpndebug
  15
  16 // global vars
  17         struct keyvalue *kv = NULL;
  18         FILE *ifacefile = NULL;
  19
  20 char redif[STRING_SIZE];
  21 char blueif[STRING_SIZE];
  22 char orangeif[STRING_SIZE];
  23 char enablered[STRING_SIZE] = "off";
  24 char enableblue[STRING_SIZE] = "off";
  25 char enableorange[STRING_SIZE] = "off";
  26
  27 // consts
  28 char OVPNINPUT[STRING_SIZE] = "OVPNINPUT";
  29 char OVPNBLOCK[STRING_SIZE] = "OVPNBLOCK";
  30 char OVPNNAT[STRING_SIZE] = "OVPNNAT";
  31 char WRAPPERVERSION[STRING_SIZE] = "ipfire-2.2.4";
  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         char port[STRING_SIZE];
  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(" -drrd --delete-rrd\n");
  77         printf("      Deletes the RRD data for a specific client\n");
  78         printf("      you need to pass a connection name (RW) to the switch to delete the directory (case sensitive)\n");
  79         printf(" -d   --display\n");
  80         printf("      displays OpenVPN status to syslog\n");
  81         printf(" -fwr --firewall-rules\n");
  82         printf("      removes current OpenVPN chains and rules and resets them according to the config\n");
  83         printf(" -sdo --start-daemon-only\n");
  84         printf("      starts OpenVPN daemon only\n");
  85         exit(1);
  86 }
  87
  88 connection *getConnections() {
  89         FILE *fp = NULL;
  90
  91         if (!(fp = fopen(CONFIG_ROOT "/ovpn/ovpnconfig", "r"))) {
  92                 fprintf(stderr, "Could not open openvpn n2n configuration file.\n");
  93                 exit(1);
  94         }
  95
  96         char line[STRING_SIZE] = "";
  97         char result[STRING_SIZE] = "";
  98         char *resultptr;
  99         int count;
 100         connection *conn_first = NULL;
 101         connection *conn_last = NULL;
 102         connection *conn_curr;
 103
 104         while ((fgets(line, STRING_SIZE, fp) != NULL)) {
 105                 if (line[strlen(line) - 1] == '\n')
 106                         line[strlen(line) - 1] = '\0';
 107
 108                 conn_curr = (connection *)malloc(sizeof(connection));
 109                 memset(conn_curr, 0, sizeof(connection));
 110
 111                 if (conn_first == NULL) {
 112                         conn_first = conn_curr;
 113                 } else {
 114                         conn_last->next = conn_curr;
 115                 }
 116                 conn_last = conn_curr;
 117
 118                 count = 0;
 119                 char *lineptr = &line;
 120                 while (1) {
 121                         if (*lineptr == NULL)
 122                                 break;
 123
 124                         resultptr = result;
 125                         while (*lineptr != NULL) {
 126                                 if (*lineptr == ',') {
 127                                         lineptr++;
 128                                         break;
 129                                 }
 130                                 *resultptr++ = *lineptr++;
 131                         }
 132                         *resultptr = '\0';
 133
 134                         if (count == 1) {
 135                                 strcpy(conn_curr->status, result);
 136                         } else if (count == 2) {
 137                                 strcpy(conn_curr->name, result);
 138                         } else if (count == 4) {
 139                                 strcpy(conn_curr->type, result);
 140                         } else if (count == 7) {
 141                                 strcpy(conn_curr->role, result);
 142                         } else if (count == 9) {
 143                                 strcpy(conn_curr->local_subnet, result);
 144                         } else if (count == 28) {
 145                                 strcpy(conn_curr->transfer_subnet, result);
 146                         } else if (count == 29) {
 147                                 strcpy(conn_curr->proto, result);
 148                         } else if (count == 30) {
 149                                 strcpy(conn_curr->port, result);
 150                         }
 151
 152                         count++;
 153                 }
 154         }
 155
 156         fclose(fp);
 157
 158         return conn_first;
 159 }
 160
 161 int readPidFile(const char *pidfile) {
 162         FILE *fp = fopen(pidfile, "r");
 163         if (fp == NULL) {
 164                 exit(1);
 165         }
 166
 167         int pid = 0;
 168         fscanf(fp, "%d", &pid);
 169         fclose(fp);
 170
 171         return pid;
 172 }
 173
 174 int readExternalAddress(char* address) {
 175         FILE *fp = fopen("/var/ipfire/red/local-ipaddress", "r");
 176         if (!fp)
 177                 goto ERROR;
 178
 179         int r = fscanf(fp, "%s", address);
 180         fclose(fp);
 181
 182         if (r < 0)
 183                 goto ERROR;
 184
 185         /* In case the read IP address is not valid, we empty
 186          * the content of address and return non-zero. */
 187         if (!VALID_IP(address))
 188                 goto ERROR;
 189
 190         return 0;
 191
 192 ERROR:
 193         address = NULL;
 194         return 1;
 195 }
 196
 197 void ovpnInit(void) {
 198         // Read OpenVPN configuration
 199         kv = initkeyvalues();
 200         if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings")) {
 201                 fprintf(stderr, "Cannot read ovpn settings\n");
 202                 exit(1);
 203         }
 204
 205         if (!findkey(kv, "ENABLED", enablered)) {
 206                 exit(1);
 207         }
 208
 209         if (!findkey(kv, "ENABLED_BLUE", enableblue)){
 210                 exit(1);
 211         }
 212
 213         if (!findkey(kv, "ENABLED_ORANGE", enableorange)){
 214                 exit(1);
 215         }
 216         freekeyvalues(kv);
 217
 218         // read interface settings
 219
 220         // details for the red int
 221         memset(redif, 0, STRING_SIZE);
 222         if ((ifacefile = fopen(CONFIG_ROOT "/red/iface", "r")))
 223         {
 224                 if (fgets(redif, STRING_SIZE, ifacefile))
 225                 {
 226                         if (redif[strlen(redif) - 1] == '\n')
 227                                 redif[strlen(redif) - 1] = '\0';
 228                 }
 229                 fclose (ifacefile);
 230                 ifacefile = NULL;
 231
 232                 if (!VALID_DEVICE(redif))
 233                 {
 234                         memset(redif, 0, STRING_SIZE);
 235                 }
 236         }
 237
 238         kv=initkeyvalues();
 239         if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
 240                 fprintf(stderr, "Cannot read ethernet settings\n");
 241                 exit(1);
 242         }
 243
 244         if (strcmp(enableblue, "on") == 0) {
 245                 if (!findkey(kv, "BLUE_DEV", blueif)) {
 246                         exit(1);
 247                 }
 248         }
 249
 250         if (strcmp(enableorange, "on") == 0) {
 251                 if (!findkey(kv, "ORANGE_DEV", orangeif)) {
 252                         exit(1);
 253                 }
 254         }
 255         freekeyvalues(kv);
 256 }
 257
 258 void executeCommand(char *command) {
 259 #ifdef ovpndebug
 260         printf(strncat(command, "\n", 2));
 261 #endif
 262         safe_system(strncat(command, " >/dev/null 2>&1", 17));
 263 }
 264
 265 void addRule(const char *chain, const char *interface, const char *protocol, const char *port) {
 266         char command[STRING_SIZE];
 267
 268         snprintf(command, STRING_SIZE - 1, "/sbin/iptables -A %s -i %s -p %s --dport %s -j ACCEPT",
 269                 chain, interface, protocol, port);
 270         executeCommand(command);
 271 }
 272
 273 void flushChain(char *chain) {
 274         char str[STRING_SIZE];
 275
 276         snprintf(str, STRING_SIZE - 1, "/sbin/iptables -F %s", chain);
 277         executeCommand(str);
 278 }
 279
 280 void flushChainNAT(char *chain) {
 281         char str[STRING_SIZE];
 282
 283         snprintf(str, STRING_SIZE - 1, "/sbin/iptables -t nat -F %s", chain);
 284         executeCommand(str);
 285 }
 286
 287 char* calcTransferNetAddress(const connection* conn) {
 288         char *subnetmask = strdup(conn->transfer_subnet);
 289         char *address = strsep(&subnetmask, "/");
 290
 291         if ((address == NULL) || (subnetmask == NULL)) {
 292                 goto ERROR;
 293         }
 294
 295         in_addr_t _address    = inet_addr(address);
 296         in_addr_t _subnetmask = inet_addr(subnetmask);
 297         _address &= _subnetmask;
 298
 299         if (strcmp(conn->role, "server") == 0) {
 300                 _address += 1 << 24;
 301         } else if (strcmp(conn->role, "client") == 0) {
 302                 _address += 2 << 24;
 303         } else {
 304                 goto ERROR;
 305         }
 306
 307         struct in_addr address_info;
 308         address_info.s_addr = _address;
 309
 310         return inet_ntoa(address_info);
 311
 312 ERROR:
 313         fprintf(stderr, "Could not determine transfer net address: %s\n", conn->name);
 314
 315         free(address);
 316         return NULL;
 317 }
 318
 319 char* getLocalSubnetAddress(const connection* conn) {
 320         kv = initkeyvalues();
 321         if (!readkeyvalues(kv, CONFIG_ROOT "/ethernet/settings")) {
 322                 fprintf(stderr, "Cannot read ethernet settings\n");
 323                 exit(1);
 324         }
 325
 326         const char *zones[] = {"GREEN", "BLUE", "ORANGE", NULL};
 327         char *zone = NULL;
 328
 329         // Get net address of the local openvpn subnet.
 330         char *subnetmask = strdup(conn->local_subnet);
 331         char *address = strsep(&subnetmask, "/");
 332
 333         if ((address == NULL) || (subnetmask == NULL)) {
 334                 goto ERROR;
 335         }
 336
 337         in_addr_t _address    = inet_addr(address);
 338         in_addr_t _subnetmask = inet_addr(subnetmask);
 339
 340         in_addr_t _netaddr    = (_address &  _subnetmask);
 341         in_addr_t _broadcast  = (_address | ~_subnetmask);
 342
 343         char zone_address_key[STRING_SIZE];
 344         char zone_address[STRING_SIZE];
 345         in_addr_t zone_addr;
 346
 347         int i = 0;
 348         while (zones[i]) {
 349                 zone = zones[i++];
 350                 snprintf(zone_address_key, STRING_SIZE, "%s_ADDRESS", zone);
 351
 352                 if (!findkey(kv, zone_address_key, zone_address))
 353                         continue;
 354
 355                 zone_addr = inet_addr(zone_address);
 356                 if ((zone_addr > _netaddr) && (zone_addr < _broadcast)) {
 357                         freekeyvalues(kv);
 358
 359                         return strdup(zone_address);
 360                 }
 361         }
 362
 363 ERROR:
 364         fprintf(stderr, "Could not determine local subnet address: %s\n", conn->name);
 365
 366         freekeyvalues(kv);
 367         return NULL;
 368 }
 369
 370 void setFirewallRules(void) {
 371         char command[STRING_SIZE];
 372         char protocol[STRING_SIZE] = "";
 373         char dport[STRING_SIZE] = "";
 374         char dovpnip[STRING_SIZE] = "";
 375
 376         kv = initkeyvalues();
 377         if (!readkeyvalues(kv, CONFIG_ROOT "/ovpn/settings"))
 378         {
 379                 fprintf(stderr, "Cannot read ovpn settings\n");
 380                 exit(1);
 381         }
 382
 383         /* we got one device, so lets proceed further   */
 384         if (!findkey(kv, "DDEST_PORT", dport)){
 385                 fprintf(stderr, "Cannot read DDEST_PORT\n");
 386                 exit(1);
 387         }
 388
 389         if (!findkey(kv, "DPROTOCOL", protocol)){
 390                 fprintf(stderr, "Cannot read DPROTOCOL\n");
 391                 exit(1);
 392         }
 393
 394         if (!findkey(kv, "VPN_IP", dovpnip)){
 395                 fprintf(stderr, "Cannot read VPN_IP\n");
 396         }
 397         freekeyvalues(kv);
 398
 399         // Flush all chains.
 400         flushChain(OVPNINPUT);
 401         flushChain(OVPNBLOCK);
 402         flushChainNAT(OVPNNAT);
 403
 404         // set firewall rules
 405         if (!strcmp(enablered, "on") && strlen(redif))
 406                 addRule(OVPNINPUT, redif, protocol, dport);
 407         if (!strcmp(enableblue, "on") && strlen(blueif))
 408                 addRule(OVPNINPUT, blueif, protocol, dport);
 409         if (!strcmp(enableorange, "on") && strlen(orangeif))
 410                 addRule(OVPNINPUT, orangeif, protocol, dport);
 411
 412         /* Allow ICMP error messages to pass. */
 413         snprintf(command, STRING_SIZE - 1, "/sbin/iptables -A %s -p icmp"
 414                 " -m conntrack --ctstate RELATED -j RETURN", OVPNBLOCK);
 415         executeCommand(command);
 416
 417         // read connection configuration
 418         connection *conn = getConnections();
 419
 420         // set firewall rules for n2n connections
 421         char *local_subnet_address = NULL;
 422         char *transfer_subnet_address = NULL;
 423         while (conn != NULL) {
 424                 if (strcmp(conn->type, "net") == 0) {
 425                         addRule(OVPNINPUT, redif, conn->proto, conn->port);
 426
 427                         /* Block all communication from the transfer nets. */
 428                         snprintf(command, STRING_SIZE - 1, "/sbin/iptables -A %s -s %s -j DROP",
 429                                 OVPNBLOCK, conn->transfer_subnet);
 430                         executeCommand(command);
 431
 432                         local_subnet_address = getLocalSubnetAddress(conn);
 433                         transfer_subnet_address = calcTransferNetAddress(conn);
 434
 435                         if ((local_subnet_address) && (transfer_subnet_address)) {
 436                                 snprintf(command, STRING_SIZE - 1, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
 437                                         OVPNNAT, transfer_subnet_address, local_subnet_address);
 438                                 executeCommand(command);
 439                         }
 440                 }
 441
 442                 conn = conn->next;
 443         }
 444 }
 445
 446 void stopDaemon(void) {
 447         char command[STRING_SIZE];
 448
 449         int pid = readPidFile("/var/run/openvpn.pid");
 450         if (!pid > 0) {
 451                 exit(1);
 452         }
 453
 454         fprintf(stderr, "Killing PID %d.\n", pid);
 455         kill(pid, SIGTERM);
 456
 457         snprintf(command, STRING_SIZE - 1, "/bin/rm -f /var/run/openvpn.pid");
 458         executeCommand(command);
 459 }
 460
 461 void startDaemon(void) {
 462         char command[STRING_SIZE];
 463
 464         if (!((strcmp(enablered, "on") == 0) || (strcmp(enableblue, "on") == 0) || (strcmp(enableorange, "on") == 0))) {
 465                 fprintf(stderr, "OpenVPN is not enabled on any interface\n");
 466                 exit(1);
 467         } else {
 468                 snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
 469                 executeCommand(command);
 470                 snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --config /var/ipfire/ovpn/server.conf");
 471                 executeCommand(command);
 472         }
 473 }
 474
 475 int startNet2Net(char *name) {
 476         connection *conn = NULL;
 477         connection *conn_iter;
 478
 479         conn_iter = getConnections();
 480
 481         while (conn_iter) {
 482                 if ((strcmp(conn_iter->type, "net") == 0) && (strcmp(conn_iter->name, name) == 0)) {
 483                         conn = conn_iter;
 484                         break;
 485                 }
 486                 conn_iter = conn_iter->next;
 487         }
 488
 489         if (conn == NULL) {
 490                 fprintf(stderr, "Connection not found.\n");
 491                 return 1;
 492         }
 493
 494         if (strcmp(conn->status, "on") != 0) {
 495                 fprintf(stderr, "Connection '%s' is not enabled.\n", conn->name);
 496                 return 1;
 497         }
 498
 499         fprintf(stderr, "Starting connection %s...\n", conn->name);
 500
 501         char configfile[STRING_SIZE];
 502         snprintf(configfile, STRING_SIZE - 1, CONFIG_ROOT "/ovpn/n2nconf/%s/%s.conf",
 503                 conn->name, conn->name);
 504
 505         FILE *fp = fopen(configfile, "r");
 506         if (fp == NULL) {
 507                 fprintf(stderr, "Could not find configuration file for connection '%s' at '%s'.\n",
 508                         conn->name, configfile);
 509                 return 2;
 510         }
 511         fclose(fp);
 512
 513         // Make sure all firewall rules are up to date.
 514         setFirewallRules();
 515
 516         // Get the external IP address.
 517         char address[STRING_SIZE] = "";
 518         int r = readExternalAddress(address);
 519         if (r) {
 520                 fprintf(stderr, "Could not read the external address\n");
 521                 exit(1);
 522         }
 523
 524         char command[STRING_SIZE];
 525         snprintf(command, STRING_SIZE-1, "/sbin/modprobe tun");
 526         executeCommand(command);
 527         snprintf(command, STRING_SIZE-1, "/usr/sbin/openvpn --local %s --config %s", address, configfile);
 528         executeCommand(command);
 529
 530         return 0;
 531 }
 532
 533 int killNet2Net(char *name) {
 534         connection *conn = NULL;
 535         connection *conn_iter;
 536
 537         conn_iter = getConnections();
 538
 539         while (conn_iter) {
 540                 if (strcmp(conn_iter->name, name) == 0) {
 541                         conn = conn_iter;
 542                         break;
 543                 }
 544                 conn_iter = conn_iter->next;
 545         }
 546
 547         if (conn == NULL) {
 548                 fprintf(stderr, "Connection not found.\n");
 549                 return 1;
 550         }
 551
 552         char pidfile[STRING_SIZE];
 553         snprintf(pidfile, STRING_SIZE - 1, "/var/run/%sn2n.pid", conn->name);
 554
 555         int pid = readPidFile(pidfile);
 556         if (!pid > 0) {
 557                 fprintf(stderr, "Could not read pid file of connection %s.", conn->name);
 558                 return 1;
 559         }
 560
 561         fprintf(stderr, "Killing connection %s (PID %d)...\n", conn->name, pid);
 562         kill(pid, SIGTERM);
 563
 564         char command[STRING_SIZE];
 565         snprintf(command, STRING_SIZE - 1, "/bin/rm -f %s", pidfile);
 566         executeCommand(command);
 567
 568         return 0;
 569 }
 570
 571 int deleterrd(char *name) {
 572         connection *conn = getConnections();
 573
 574         char rrd_file[STRING_SIZE];
 575         snprintf(rrd_file, STRING_SIZE - 1, "/var/log/rrd/collectd/localhost/openvpn-%s/if_octets.rrd", name);
 576
 577         char rrd_dir[STRING_SIZE];
 578         snprintf(rrd_dir, STRING_SIZE - 1, "/var/log/rrd/collectd/localhost/openvpn-%s", name);
 579
 580         while(conn) {
 581                 /* Find only RW-Connections with the given name. */
 582                 if (((strcmp(conn->type, "host") == 0) && (strcmp(conn->name, name) == 0))) {
 583                         remove(rrd_file);
 584                         remove(rrd_dir);
 585                         return 0;
 586                 }
 587                 conn = conn->next;
 588         }
 589
 590         return 1;
 591 }
 592
 593 void startAllNet2Net() {
 594         int exitcode = 0, _exitcode = 0;
 595
 596         connection *conn = getConnections();
 597
 598         while(conn) {
 599                 /* Skip all connections that are not of type "net" or disabled. */
 600                 if ((strcmp(conn->type, "net") != 0) || (strcmp(conn->status, "on") != 0)) {
 601                         conn = conn->next;
 602                         continue;
 603                 }
 604
 605                 _exitcode = startNet2Net(conn->name);
 606                 conn = conn->next;
 607
 608                 if (_exitcode > exitcode) {
 609                         exitcode = _exitcode;
 610                 }
 611         }
 612
 613         exit(exitcode);
 614 }
 615
 616 void killAllNet2Net() {
 617         int exitcode = 0, _exitcode = 0;
 618
 619         connection *conn = getConnections();
 620
 621         while(conn) {
 622                 /* Skip all connections that are not of type "net". */
 623                 if (strcmp(conn->type, "net") != 0) {
 624                         conn = conn->next;
 625                         continue;
 626                 }
 627
 628                 _exitcode = killNet2Net(conn->name);
 629                 conn = conn->next;
 630
 631                 if (_exitcode > exitcode) {
 632                         exitcode = _exitcode;
 633                 }
 634         }
 635
 636         exit(exitcode);
 637 }
 638
 639 void displayopenvpn(void) {
 640         char command[STRING_SIZE];
 641
 642         snprintf(command, STRING_SIZE - 1, "/bin/killall -sSIGUSR2 openvpn");
 643         executeCommand(command);
 644 }
 645
 646 int main(int argc, char *argv[]) {
 647         if (!(initsetuid()))
 648             exit(1);
 649         if(argc < 2)
 650             usage();
 651
 652         if(argc == 3) {
 653                 ovpnInit();
 654
 655                 if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
 656                         startNet2Net(argv[2]);
 657                         return 0;
 658                 }
 659                 else if( (strcmp(argv[1], "-kn2n") == 0) || (strcmp(argv[1], "--kill-net-2-net") == 0) ) {
 660                         killNet2Net(argv[2]);
 661                         return 0;
 662                 }
 663                 else if( (strcmp(argv[1], "-drrd") == 0) || (strcmp(argv[1], "--delete-rrd") == 0) ) {
 664                         deleterrd(argv[2]);
 665                         return 0;
 666                 } else {
 667                         usage();
 668                         return 1;
 669                 }
 670         }
 671         else if(argc == 2) {
 672                 if( (strcmp(argv[1], "-k") == 0) || (strcmp(argv[1], "--kill") == 0) ) {
 673                         stopDaemon();
 674                         return 0;
 675                 }
 676                 else if( (strcmp(argv[1], "-d") == 0) || (strcmp(argv[1], "--display") == 0) ) {
 677                         displayopenvpn();
 678                         return 0;
 679                 }
 680                 else {
 681                         ovpnInit();
 682
 683                         if( (strcmp(argv[1], "-s") == 0) || (strcmp(argv[1], "--start") == 0) ) {
 684                                 setFirewallRules();
 685                                 startDaemon();
 686                                 return 0;
 687                         }
 688                         else if( (strcmp(argv[1], "-sn2n") == 0) || (strcmp(argv[1], "--start-net-2-net") == 0) ) {
 689                                 startAllNet2Net();
 690                                 return 0;
 691                         }
 692                         else if( (strcmp(argv[1], "-kn2n") == 0) || (strcmp(argv[1], "--kill-net-2-net") == 0) ) {
 693                                 killAllNet2Net();
 694                                 return 0;
 695                         }
 696                         else if( (strcmp(argv[1], "-sdo") == 0) || (strcmp(argv[1], "--start-daemon-only") == 0) ) {
 697                                 startDaemon();
 698                                 return 0;
 699                         }
 700                         else if( (strcmp(argv[1], "-r") == 0) || (strcmp(argv[1], "--restart") == 0) ) {
 701                                 stopDaemon();
 702                                 setFirewallRules();
 703                                 startDaemon();
 704                                 return 0;
 705                         }
 706                         else if( (strcmp(argv[1], "-fwr") == 0) || (strcmp(argv[1], "--firewall-rules") == 0) ) {
 707                                 setFirewallRules();
 708                                 return 0;
 709                         }
 710                         else {
 711                                 usage();
 712                                 return 0;
 713                         }
 714                 }
 715         }
 716         else {
 717                 usage();
 718                 return 0;
 719         }
 720 return 0;
 721 }
 722