main.c

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** Linux Call Router                                                         **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** Main function                                                             **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 #include "main.h"
  13 #ifdef PACKAGE_VERSION
  14 #undef PACKAGE_VERSION
  15 #endif
  16 #include "config.h"
  17
  18 //MESSAGES
  19
  20 struct timeval now_tv;
  21 struct timezone now_tz;
  22 #define GET_NOW() \
  23         { \
  24                 gettimeofday(&now_tv, &now_tz); \
  25                 now_d = ((double)(now_tv.tv_usec))/1000000 + now_tv.tv_sec; \
  26         }
  27
  28 FILE *debug_fp = NULL;
  29 int quit = 0;
  30
  31 #if 0
  32 struct lcr_fdset lcr_fdset[FD_SETSIZE];
  33 #endif
  34
  35 pthread_mutex_t mutexd; // debug output mutex
  36 pthread_mutex_t mutext; // trace output mutex
  37 pthread_mutex_t mutexe; // error output mutex
  38 //pthread_mutex_t mutex_lcr; // lcr process mutex
  39
  40 int memuse = 0;
  41 int mmemuse = 0;
  42 int cmemuse = 0;
  43 int ememuse = 0;
  44 int pmemuse = 0;
  45 int amemuse = 0;
  46 int rmemuse = 0;
  47 int classuse = 0;
  48 int fduse = 0;
  49 int fhuse = 0;
  50
  51 int debug_count = 0;
  52 int last_debug = 0;
  53 int debug_newline = 1;
  54 int nooutput = 0;
  55
  56 void debug(const char *file, const char *function, int line, const char *prefix, char *buffer)
  57 {
  58         time_t now;
  59         struct tm *now_tm;
  60
  61         /* if we have a new debug count, we add a mark */
  62         if (last_debug != debug_count) {
  63                 last_debug = debug_count;
  64                 time(&now);
  65                 now_tm = localtime(&now);
  66                 if (!nooutput)
  67                         printf("\033[34m--------------------- %04d.%02d.%02d %02d:%02d:%02d %06d\033[36m\n", now_tm->tm_year+1900, now_tm->tm_mon+1, now_tm->tm_mday, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec, debug_count%1000000);
  68                 if (debug_fp)
  69                         fprintf(debug_fp, "--------------------- %04d.%02d.%02d %02d:%02d:%02d %06d\n", now_tm->tm_year+1900, now_tm->tm_mon+1, now_tm->tm_mday, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec, debug_count%1000000);
  70         }
  71
  72         if (!nooutput) {
  73                 if (debug_newline)
  74                         printf("\033[32m%06d %s\033[37m%s", debug_count%1000000, prefix?prefix:"", prefix?" ":"");
  75                 if (function)
  76                         printf("(in %s/%s() line %d): %s", file, function, line, buffer);
  77                 else
  78                         printf("%s", buffer);
  79         }
  80
  81         if (debug_fp) {
  82                 if (debug_newline) {
  83                         if (function)
  84                                 fprintf(debug_fp, "%s%s(in %s() line %d): %s", prefix?prefix:"", prefix?" ":"", function, line, buffer);
  85                         else
  86                                 fprintf(debug_fp, "%s%s: %s", prefix?prefix:"", prefix?" ":"", buffer);
  87                         fflush(debug_fp);
  88                 }
  89         }
  90
  91         debug_newline = 0;
  92         if (buffer[0])
  93                 if (buffer[strlen(buffer)-1] == '\n')
  94                         debug_newline = 1;
  95 }
  96
  97
  98 void _printdebug(const char *file, const char *function, int line, unsigned int mask, const char *fmt, ...)
  99 {
 100         char buffer[4096];
 101         va_list args;
 102
 103         if (!(options.deb & mask))
 104                 return;
 105         pthread_mutex_lock(&mutexd);
 106
 107         va_start(args,fmt);
 108         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 109         buffer[sizeof(buffer)-1]=0;
 110         va_end(args);
 111
 112         debug(file, function, line, "DEBUG", buffer);
 113
 114         pthread_mutex_unlock(&mutexd);
 115 }
 116
 117 void _printerror(const char *file, const char *function, int line, const char *fmt, ...)
 118 {
 119         char buffer[4096];
 120         va_list args;
 121
 122         pthread_mutex_lock(&mutexe);
 123
 124         va_start(args,fmt);
 125         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 126         buffer[sizeof(buffer)-1]=0;
 127         va_end(args);
 128
 129         if (options.deb)
 130                 debug(file, function, line, "ERROR", buffer);
 131         else { /* only if we do not debug */
 132                 if (function)
 133                         fprintf(stderr, "ERROR (in %s() line %d) %s", function, line, buffer);
 134                 else
 135                         fprintf(stderr, "ERROR %s", buffer);
 136         }
 137
 138         pthread_mutex_unlock(&mutexe);
 139 }
 140
 141
 142 void sighandler(int sigset)
 143 {
 144         struct sched_param schedp;
 145
 146         if (sigset == SIGHUP)
 147                 return;
 148         if (sigset == SIGPIPE)
 149                 return;
 150         fprintf(stderr, "LCR: Signal received: %d\n", sigset);
 151         PDEBUG(DEBUG_LOG, "Signal received: %d\n", sigset);
 152         /* reset signals */
 153         signal(SIGINT,SIG_DFL);
 154         signal(SIGHUP,SIG_DFL);
 155         signal(SIGTERM,SIG_DFL);
 156         signal(SIGPIPE,SIG_DFL);
 157         if (!quit) {
 158                 quit = sigset;
 159                 /* set scheduler & priority */
 160                 if (options.schedule > 1) {
 161                         memset(&schedp, 0, sizeof(schedp));
 162                         schedp.sched_priority = 0;
 163                         sched_setscheduler(0, SCHED_OTHER, &schedp);
 164                 }
 165         }
 166 }
 167
 168
 169 /*
 170  * the main
 171  */
 172 int main(int argc, char *argv[])
 173 {
 174 #if 0
 175         double                  now_d, last_d;
 176         int                     all_idle;
 177 #endif
 178         int                     ret = -1;
 179         int                     lockfd = -1; /* file lock */
 180         struct lcr_msg          *message;
 181         int                     i;
 182         struct sched_param      schedp;
 183         int                     created_mutexd = 0,/* created_mutext = 0,*/ created_mutexe = 0,
 184                                 created_lock = 0, created_signal = 0, created_message = 0;
 185 #ifdef WITH_MISDN
 186         int                     created_misdn = 0;
 187 #endif
 188         char                    tracetext[256], lock[128];
 189         char                    options_error[256];
 190
 191 #if 0
 192         /* init fdset */
 193         memset(lcr_fdset, 0, sizeof(lcr_fdset));
 194 #endif
 195
 196         /* lock LCR process */
 197 //      pthread_mutex_lock(&mutex_lcr);
 198
 199         /* show version */
 200         printf("\n** %s  Version %s\n\n", NAME, VERSION_STRING);
 201
 202         /* show options */
 203         if (argc <= 1) {
 204                 usage:
 205                 printf("\n");
 206                 printf("Usage: lcr (query | start | fork | rules | route)\n");
 207                 printf("query     = Show available isdn ports.\n");
 208                 printf("start     = Run lcr normally, abort with CTRL+C.\n");
 209                 printf("fork      = Do daemon fork and run as background process.\n");
 210                 printf("interface = Get help of available interface syntax.\n");
 211                 printf("rules     = Get help of available routing rule syntax.\n");
 212                 printf("rules [action] = Get individual help for given action.\n");
 213 //              printf("route = Show current routing as it is parsed.\n");
 214                 printf("\n");
 215                 ret = 999;
 216                 goto free;
 217         }
 218
 219 #ifdef WITH_CRYPT
 220         /* init crc */
 221         crc_init();
 222 #endif
 223
 224         /* the mutex init */
 225         if (pthread_mutex_init(&mutexd, NULL)) {
 226                 fprintf(stderr, "cannot create 'PDEBUG' mutex\n");
 227                 goto free;
 228         }
 229         created_mutexd = 1;
 230 //      if (pthread_mutex_init(&mutext, NULL)) {
 231 //              fprintf(stderr, "cannot create 'trace' mutex\n");
 232 //              goto free;
 233 //      }
 234 //      created_mutext = 1;
 235         if (pthread_mutex_init(&mutexe, NULL)) {
 236                 fprintf(stderr, "cannot create 'PERROR' mutex\n");
 237                 goto free;
 238         }
 239         created_mutexe = 1;
 240
 241         /* show interface */
 242         if (!(strcasecmp(argv[1],"interface"))) {
 243                 doc_interface();
 244                 ret = 0;
 245                 goto free;
 246         }
 247
 248         /* show rules */
 249         if (!(strcasecmp(argv[1],"rules"))) {
 250                 if (argc <= 2)
 251                         doc_rules(NULL);
 252                 else
 253                         doc_rules(argv[2]);
 254                 ret = 0;
 255                 goto free;
 256         }
 257
 258         /* query available isdn ports */
 259         if (!(strcasecmp(argv[1],"query"))) {
 260                 int rc;
 261                 fprintf(stderr, "-> Using 'misdn_info'\n");
 262                 rc = system("misdn_info");
 263                 ret = 0;
 264                 goto free;
 265         }
 266
 267         /* read options */
 268         if (read_options(options_error) == 0) {
 269                 PERROR("%s", options_error);
 270                 goto free;
 271         }
 272
 273 #ifdef WITH_MISDN
 274         /* init mISDN */
 275         if (mISDN_initialize() < 0)
 276                 goto free;
 277         created_misdn = 1;
 278 #endif
 279
 280         /* read ruleset(s) */
 281         if (!(ruleset_first = ruleset_parse()))
 282                 goto free;
 283
 284         /* set pointer to main ruleset */
 285         ruleset_main = getrulesetbyname("main");
 286         if (!ruleset_main) {
 287                 fprintf(stderr, "\n***\n -> Missing 'main' ruleset, causing ALL calls to be disconnected.\n***\n\n");
 288                 PDEBUG(DEBUG_LOG, "Missing 'main' ruleset, causing ALL calls to be disconnected.\n");
 289                 sleep(2);
 290         }
 291
 292 #if 0
 293         /* query available isdn ports */
 294         if (!(strcasecmp(argv[1],"route"))) {
 295                 ruleset_debug(ruleset_first);
 296                 ret = 0;
 297                 goto free;
 298         }
 299 #endif
 300
 301         /* do fork in special cases */
 302         if (!(strcasecmp(argv[1],"fork"))) {
 303                 pid_t pid;
 304                 FILE *pidfile;
 305
 306                 /* do daemon fork */
 307                 pid = fork();
 308
 309                 if (pid < 0) {
 310                         fprintf(stderr, "Cannot fork!\n");
 311                         goto free;
 312                 }
 313                 if (pid != 0) {
 314                         exit(0);
 315                 }
 316                 usleep(200000);
 317                 printf("\n");
 318
 319                 /* do second fork */
 320                 pid = fork();
 321
 322                 if (pid < 0) {
 323                         fprintf(stderr, "Cannot fork!\n");
 324                         goto free;
 325                 }
 326                 if (pid != 0) {
 327                         printf("LCR: Starting daemon.\n");
 328                         exit(0);
 329                 }
 330                 nooutput = 1;
 331
 332                 /* write pid file */
 333                 SPRINT(lock, "%s/lcr.pid", options.lock);
 334                 pidfile = fopen(lock,"w");
 335                 if (pidfile) {
 336                         fprintf(pidfile, "%d\n", getpid());
 337                         fclose(pidfile);
 338                 } else
 339                         fprintf(stderr, "Failed to create PID file: %s\n", lock);
 340         } else
 341         /* if not start */
 342         if (!!strcasecmp(argv[1],"start")) {
 343                 goto usage;
 344         }
 345
 346         /* create lock and lock! */
 347         SPRINT(lock, "%s/lcr.lock", options.lock);
 348         if ((lockfd = open(lock, O_CREAT | O_WRONLY, S_IWUSR)) < 0) {
 349                 fprintf(stderr, "Cannot create lock file: %s\n", lock);
 350                 fprintf(stderr, "Check options.conf to change to path with permissions for you.\n");
 351                 goto free;
 352         }
 353         if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 354                 if (errno == EWOULDBLOCK)
 355                         fprintf(stderr, "LCR: Another LCR process is running. Please kill the other one.\n");
 356                 else    fprintf(stderr, "Locking process failed: errno=%d\n", errno);
 357                 goto free;
 358         }
 359         created_lock = 1;
 360
 361         /* initialize admin socket */
 362         if (admin_init()) {
 363                 fprintf(stderr, "Unable to initialize admin socket.\n");
 364                 goto free;
 365         }
 366
 367         /* generate alaw / ulaw tables */
 368         generate_tables(options.law);
 369
 370 #ifdef WITH_SIP
 371         /* init SIP globals */
 372         sip_init();
 373 #endif
 374
 375 #ifdef WITH_SS5
 376         /* init ss5 sine tables */
 377         ss5_sine_generate();
 378         ss5_test_decode();
 379 #endif
 380
 381         /* load tones (if requested) */
 382         if (fetch_tones() == 0) {
 383                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 384                 goto free;
 385         }
 386
 387 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 388         /* init gsm */
 389         if (gsm_init()) {
 390                 fprintf(stderr, "GSM initialization failed.\n");
 391                 goto free;
 392         }
 393 #endif
 394 #if 0
 395 init is done when interface is up
 396 #ifdef WITH_GSM_BS
 397         if (gsm_bs_init()) {
 398                 fprintf(stderr, "GSM BS initialization failed.\n");
 399                 goto free;
 400         }
 401 #endif
 402 #endif
 403 #ifdef WITH_GSM_MS
 404         if (gsm_ms_init()) {
 405                 fprintf(stderr, "GSM MS initialization failed.\n");
 406                 goto free;
 407         }
 408 #endif
 409
 410         /* read interfaces and open ports */
 411         if (!read_interfaces()) {
 412                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 413                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 414                 goto free;
 415         }
 416         relink_interfaces();
 417         interface_first = interface_newlist;
 418         interface_newlist = NULL;
 419
 420         /* locking memory paging */
 421         i = 0;
 422         while(i < 10) {
 423                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 424                         break;
 425                 usleep(200000);
 426                 i++;
 427         }
 428         if (i == 10) {
 429                 switch(errno) {
 430                         case ENOMEM:
 431                         fprintf(stderr, "Warning: Not enough memory to lock paging.\n");
 432                         break;
 433                         case EPERM:
 434                         fprintf(stderr, "Warning: No permission to lock paging.\n");
 435                         break;
 436                         case EFAULT:
 437                         fprintf(stderr, "Warning: 'Bad address' while locking paging.\n");
 438                         break;
 439                         default:
 440                         fprintf(stderr, "Warning: Unknown error %d while locking paging.\n", errno);
 441                 }
 442         }
 443
 444         /* set real time scheduler & priority */
 445         if (options.schedule > 1) {
 446                 memset(&schedp, 0, sizeof(schedp));
 447                 schedp.sched_priority = options.schedule;
 448                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 449                 if (ret < 0) {
 450                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 451                         goto free;
 452                 }
 453         }
 454
 455         /* signal handlers */
 456         signal(SIGINT,sighandler);
 457         signal(SIGHUP,sighandler);
 458         signal(SIGTERM,sighandler);
 459         signal(SIGPIPE,sighandler);
 460         created_signal = 1;
 461
 462         /* init message */
 463         init_message();
 464         created_message = 1;
 465
 466         /*** main loop ***/
 467         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 468         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 469         printf("%s\n", tracetext);
 470         end_trace();
 471         quit = 0;
 472 #if 0
 473         GET_NOW();
 474 #endif
 475         while(!quit) {
 476 #if 0
 477                 last_d = now_d;
 478                 GET_NOW();
 479                 if (now_d-last_d > 1.0) {
 480                         PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
 481                 }
 482                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 483                 all_idle = 1;
 484
 485                 /* must be processed after all queues, so they are empty */
 486                 if (select_main(1, NULL, NULL, NULL))
 487                         all_idle = 0;
 488                 if (all_idle) {
 489                         usleep(10000);
 490                 }
 491 #else
 492 #ifdef WITH_SIP
 493                 if (options.polling || any_sip_interface) {
 494 #else
 495                 if (options.polling) {
 496 #endif
 497                         if (!select_main(1, NULL, NULL, NULL)) {
 498 #ifdef WITH_SIP
 499                                 /* FIXME: check if work was done */
 500                                 sip_handle();
 501 #endif
 502                                 usleep(10000);
 503                         }
 504                 } else
 505                         select_main(0, NULL, NULL, NULL);
 506 #endif
 507         }
 508         SPRINT(tracetext, "%s terminated", NAME);
 509         printf("%s\n", tracetext);
 510         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 511         if (quit > 0)
 512                 add_trace((char *)"signal", NULL, "%d", quit);
 513         if (quit < 0)
 514                 add_trace((char *)"errno", NULL, "%d", quit);
 515         end_trace();
 516         ret=0;
 517
 518         /* free all */
 519 free:
 520
 521         /* set scheduler & priority
 522          */
 523         if (options.schedule > 1) {
 524                 memset(&schedp, 0, sizeof(schedp));
 525                 schedp.sched_priority = options.schedule;
 526                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 527         }
 528         /* reset signals */
 529         if (created_signal) {
 530                 signal(SIGINT,SIG_DFL);
 531                 signal(SIGHUP,SIG_DFL);
 532                 signal(SIGTERM,SIG_DFL);
 533                 signal(SIGPIPE,SIG_DFL);
 534         }
 535
 536         /* destroy objects */
 537         while(port_first) {
 538                 debug_count++;
 539                 delete port_first;
 540         }
 541         while(epoint_first) {
 542                 debug_count++;
 543                 delete epoint_first;
 544         }
 545         epoint_first = NULL;
 546         debug_count++;
 547         join_free();
 548
 549         /* free interfaces */
 550         if (interface_first)
 551                 free_interfaces(interface_first);
 552         interface_first = NULL;
 553
 554 #ifdef WITH_MISDN
 555         /* close isdn ports */
 556         mISDNport_close_all();
 557 #endif
 558
 559         /* flush messages */
 560         debug_count++;
 561         i = 0;
 562         while ((message = message_get())) {
 563                 i++;
 564                 message_free(message);
 565         }
 566         if (i) {
 567                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 568         }
 569
 570         /* clean messages */
 571         if (created_message)
 572                 cleanup_message();
 573
 574         /* free tones */
 575         if (toneset_first)
 576                 free_tones();
 577
 578         /* free admin socket */
 579         admin_cleanup();
 580
 581         /* close lock */
 582         if (created_lock)
 583                 flock(lockfd, LOCK_UN);
 584         if (lockfd >= 0) {
 585                 if (created_lock) {
 586                         chmod(lock, 0700);
 587                         unlink(lock);
 588                 }
 589                 close(lockfd);
 590         }
 591
 592         /* free rulesets */
 593         if (ruleset_first)
 594                 ruleset_free(ruleset_first);
 595         ruleset_first = NULL;
 596
 597         /* free mutex */
 598         if (created_mutexe)
 599                 if (pthread_mutex_destroy(&mutexe))
 600                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 601 //      if (created_mutext)
 602 //              if (pthread_mutex_destroy(&mutext))
 603 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 604         if (created_mutexd)
 605                 if (pthread_mutex_destroy(&mutexd))
 606                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 607
 608 #ifdef WITH_MISDN
 609         /* deinitialize mISDN */
 610         if (created_misdn)
 611                 mISDN_deinitialize();
 612 #endif
 613
 614         /* free gsm */
 615 #if 0
 616 exit is done when interface is down
 617 #ifdef WITH_GSM_BS
 618         gsm_bs_exit(0);
 619 #endif
 620 #endif
 621 #ifdef WITH_GSM_MS
 622         gsm_ms_exit(0);
 623 #endif
 624 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 625         gsm_exit(0);
 626 #endif
 627
 628 #ifdef WITH_SIP
 629         /* cleanup SIP globals */
 630         sip_exit();
 631 #endif
 632
 633         /* display memory leak */
 634 #define MEMCHECK(a, b) \
 635         if (b) { \
 636                 SPRINT(tracetext, a, NAME); \
 637                 start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 638                 if (ret) add_trace("blocks", NULL, "%d", b); \
 639                 end_trace(); \
 640                 printf("\n******************************\n\007"); \
 641                 printf("\nERROR: %d %s\n", b, a); \
 642                 printf("\n******************************\n"); \
 643                 ret = -1; \
 644         }
 645         MEMCHECK("",memuse)
 646         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 647         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 648         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 649         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 650         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 651         MEMCHECK("memory block(s) left (args)",amemuse)
 652         MEMCHECK("class(es) left",classuse)
 653         MEMCHECK("file descriptor(s) left",fduse)
 654         MEMCHECK("file handler(s) left",fhuse)
 655
 656         /* unlock LCR process */
 657 //      pthread_mutex_unlock(&mutex_lcr);
 658
 659         /* take me out */
 660         return(ret);
 661 }
 662
 663
 664