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         int                     polling = 0;
 191
 192 #if 0
 193         /* init fdset */
 194         memset(lcr_fdset, 0, sizeof(lcr_fdset));
 195 #endif
 196
 197         /* lock LCR process */
 198 //      pthread_mutex_lock(&mutex_lcr);
 199
 200         /* show version */
 201         printf("\n** %s  Version %s\n\n", NAME, VERSION_STRING);
 202
 203         /* show options */
 204         if (argc <= 1) {
 205                 usage:
 206                 printf("\n");
 207                 printf("Usage: lcr (query | start | fork | rules | route)\n");
 208                 printf("query     = Show available isdn ports.\n");
 209                 printf("start     = Run lcr normally, abort with CTRL+C.\n");
 210                 printf("fork      = Do daemon fork and run as background process.\n");
 211                 printf("interface = Get help of available interface syntax.\n");
 212                 printf("rules     = Get help of available routing rule syntax.\n");
 213                 printf("rules [action] = Get individual help for given action.\n");
 214 //              printf("route = Show current routing as it is parsed.\n");
 215                 printf("\n");
 216                 ret = 999;
 217                 goto free;
 218         }
 219
 220 #ifdef WITH_CRYPT
 221         /* init crc */
 222         crc_init();
 223 #endif
 224
 225         /* the mutex init */
 226         if (pthread_mutex_init(&mutexd, NULL)) {
 227                 fprintf(stderr, "cannot create 'PDEBUG' mutex\n");
 228                 goto free;
 229         }
 230         created_mutexd = 1;
 231 //      if (pthread_mutex_init(&mutext, NULL)) {
 232 //              fprintf(stderr, "cannot create 'trace' mutex\n");
 233 //              goto free;
 234 //      }
 235 //      created_mutext = 1;
 236         if (pthread_mutex_init(&mutexe, NULL)) {
 237                 fprintf(stderr, "cannot create 'PERROR' mutex\n");
 238                 goto free;
 239         }
 240         created_mutexe = 1;
 241
 242         /* show interface */
 243         if (!(strcasecmp(argv[1],"interface"))) {
 244                 doc_interface();
 245                 ret = 0;
 246                 goto free;
 247         }
 248
 249         /* show rules */
 250         if (!(strcasecmp(argv[1],"rules"))) {
 251                 if (argc <= 2)
 252                         doc_rules(NULL);
 253                 else
 254                         doc_rules(argv[2]);
 255                 ret = 0;
 256                 goto free;
 257         }
 258
 259         /* query available isdn ports */
 260         if (!(strcasecmp(argv[1],"query"))) {
 261                 int rc;
 262                 fprintf(stderr, "-> Using 'misdn_info'\n");
 263                 rc = system("misdn_info");
 264                 ret = 0;
 265                 goto free;
 266         }
 267
 268         /* read options */
 269         if (read_options(options_error) == 0) {
 270                 PERROR("%s", options_error);
 271                 goto free;
 272         }
 273         polling = options.polling;
 274
 275 #ifdef WITH_MISDN
 276         /* init mISDN */
 277         if (mISDN_initialize() < 0)
 278                 goto free;
 279         created_misdn = 1;
 280 #endif
 281
 282         /* read ruleset(s) */
 283         if (!(ruleset_first = ruleset_parse()))
 284                 goto free;
 285
 286         /* set pointer to main ruleset */
 287         ruleset_main = getrulesetbyname("main");
 288         if (!ruleset_main) {
 289                 fprintf(stderr, "\n***\n -> Missing 'main' ruleset, causing ALL calls to be disconnected.\n***\n\n");
 290                 PDEBUG(DEBUG_LOG, "Missing 'main' ruleset, causing ALL calls to be disconnected.\n");
 291                 sleep(2);
 292         }
 293
 294 #if 0
 295         /* query available isdn ports */
 296         if (!(strcasecmp(argv[1],"route"))) {
 297                 ruleset_debug(ruleset_first);
 298                 ret = 0;
 299                 goto free;
 300         }
 301 #endif
 302
 303         /* do fork in special cases */
 304         if (!(strcasecmp(argv[1],"fork"))) {
 305                 pid_t pid;
 306                 FILE *pidfile;
 307
 308                 /* do daemon fork */
 309                 pid = fork();
 310
 311                 if (pid < 0) {
 312                         fprintf(stderr, "Cannot fork!\n");
 313                         goto free;
 314                 }
 315                 if (pid != 0) {
 316                         exit(0);
 317                 }
 318                 usleep(200000);
 319                 printf("\n");
 320
 321                 /* do second fork */
 322                 pid = fork();
 323
 324                 if (pid < 0) {
 325                         fprintf(stderr, "Cannot fork!\n");
 326                         goto free;
 327                 }
 328                 if (pid != 0) {
 329                         printf("LCR: Starting daemon.\n");
 330                         exit(0);
 331                 }
 332                 nooutput = 1;
 333
 334                 /* write pid file */
 335                 pidfile = fopen("/var/run/lcr.pid","w");
 336                 if (pidfile) {
 337                         fprintf(pidfile, "%d\n", getpid());
 338                         fclose(pidfile);
 339                 }
 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         polling = 1; /* must poll, because of SIP events */
 374 #endif
 375
 376 #ifdef WITH_SS5
 377         /* init ss5 sine tables */
 378         ss5_sine_generate();
 379         ss5_test_decode();
 380 #endif
 381
 382         /* load tones (if requested) */
 383         if (fetch_tones() == 0) {
 384                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 385                 goto free;
 386         }
 387
 388 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 389         /* init gsm */
 390         if (gsm_init()) {
 391                 fprintf(stderr, "GSM initialization failed.\n");
 392                 goto free;
 393         }
 394 #endif
 395 #if 0
 396 init is done when interface is up
 397 #ifdef WITH_GSM_BS
 398         if (gsm_bs_init()) {
 399                 fprintf(stderr, "GSM BS initialization failed.\n");
 400                 goto free;
 401         }
 402 #endif
 403 #endif
 404 #ifdef WITH_GSM_MS
 405         if (gsm_ms_init()) {
 406                 fprintf(stderr, "GSM MS initialization failed.\n");
 407                 goto free;
 408         }
 409 #endif
 410
 411         /* read interfaces and open ports */
 412         if (!read_interfaces()) {
 413                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 414                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 415                 goto free;
 416         }
 417         relink_interfaces();
 418         interface_first = interface_newlist;
 419         interface_newlist = NULL;
 420
 421         /* locking memory paging */
 422         i = 0;
 423         while(i < 10) {
 424                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 425                         break;
 426                 usleep(200000);
 427                 i++;
 428         }
 429         if (i == 10) {
 430                 switch(errno) {
 431                         case ENOMEM:
 432                         fprintf(stderr, "Warning: Not enough memory to lock paging.\n");
 433                         break;
 434                         case EPERM:
 435                         fprintf(stderr, "Warning: No permission to lock paging.\n");
 436                         break;
 437                         case EFAULT:
 438                         fprintf(stderr, "Warning: 'Bad address' while locking paging.\n");
 439                         break;
 440                         default:
 441                         fprintf(stderr, "Warning: Unknown error %d while locking paging.\n", errno);
 442                 }
 443         }
 444
 445         /* set real time scheduler & priority */
 446         if (options.schedule > 1) {
 447                 memset(&schedp, 0, sizeof(schedp));
 448                 schedp.sched_priority = options.schedule;
 449                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 450                 if (ret < 0) {
 451                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 452                         goto free;
 453                 }
 454         }
 455
 456         /* signal handlers */
 457         signal(SIGINT,sighandler);
 458         signal(SIGHUP,sighandler);
 459         signal(SIGTERM,sighandler);
 460         signal(SIGPIPE,sighandler);
 461         created_signal = 1;
 462
 463         /* init message */
 464         init_message();
 465         created_message = 1;
 466
 467         /*** main loop ***/
 468         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 469         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 470         printf("%s\n", tracetext);
 471         end_trace();
 472         quit = 0;
 473 #if 0
 474         GET_NOW();
 475 #endif
 476         while(!quit) {
 477 #if 0
 478                 last_d = now_d;
 479                 GET_NOW();
 480                 if (now_d-last_d > 1.0) {
 481                         PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
 482                 }
 483                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 484                 all_idle = 1;
 485
 486                 /* must be processed after all queues, so they are empty */
 487                 if (select_main(1, NULL, NULL, NULL))
 488                         all_idle = 0;
 489                 if (all_idle) {
 490                         usleep(10000);
 491                 }
 492 #else
 493                 if (options.polling) {
 494                         if (!select_main(1, NULL, NULL, NULL)) {
 495 #ifdef WITH_SIP
 496                                 /* FIXME: check if work was done */
 497                                 sip_handle();
 498 #endif
 499                                 usleep(10000);
 500                         }
 501                 } else
 502                         select_main(0, NULL, NULL, NULL);
 503 #endif
 504         }
 505         SPRINT(tracetext, "%s terminated", NAME);
 506         printf("%s\n", tracetext);
 507         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 508         if (quit > 0)
 509                 add_trace((char *)"signal", NULL, "%d", quit);
 510         if (quit < 0)
 511                 add_trace((char *)"errno", NULL, "%d", quit);
 512         end_trace();
 513         ret=0;
 514
 515         /* free all */
 516 free:
 517
 518         /* set scheduler & priority
 519          */
 520         if (options.schedule > 1) {
 521                 memset(&schedp, 0, sizeof(schedp));
 522                 schedp.sched_priority = options.schedule;
 523                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 524         }
 525         /* reset signals */
 526         if (created_signal) {
 527                 signal(SIGINT,SIG_DFL);
 528                 signal(SIGHUP,SIG_DFL);
 529                 signal(SIGTERM,SIG_DFL);
 530                 signal(SIGPIPE,SIG_DFL);
 531         }
 532
 533         /* destroy objects */
 534         while(port_first) {
 535                 debug_count++;
 536                 delete port_first;
 537         }
 538         while(epoint_first) {
 539                 debug_count++;
 540                 delete epoint_first;
 541         }
 542         epoint_first = NULL;
 543         debug_count++;
 544         join_free();
 545
 546         /* free interfaces */
 547         if (interface_first)
 548                 free_interfaces(interface_first);
 549         interface_first = NULL;
 550
 551 #ifdef WITH_MISDN
 552         /* close isdn ports */
 553         mISDNport_close_all();
 554 #endif
 555
 556         /* flush messages */
 557         debug_count++;
 558         i = 0;
 559         while ((message = message_get())) {
 560                 i++;
 561                 message_free(message);
 562         }
 563         if (i) {
 564                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 565         }
 566
 567         /* clean messages */
 568         if (created_message)
 569                 cleanup_message();
 570
 571         /* free tones */
 572         if (toneset_first)
 573                 free_tones();
 574
 575         /* free admin socket */
 576         admin_cleanup();
 577
 578         /* close lock */
 579         if (created_lock)
 580                 flock(lockfd, LOCK_UN);
 581         if (lockfd >= 0) {
 582                 chmod(lock, 0700);
 583                 unlink(lock);
 584                 close(lockfd);
 585         }
 586
 587         /* free rulesets */
 588         if (ruleset_first)
 589                 ruleset_free(ruleset_first);
 590         ruleset_first = NULL;
 591
 592         /* free mutex */
 593         if (created_mutexe)
 594                 if (pthread_mutex_destroy(&mutexe))
 595                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 596 //      if (created_mutext)
 597 //              if (pthread_mutex_destroy(&mutext))
 598 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 599         if (created_mutexd)
 600                 if (pthread_mutex_destroy(&mutexd))
 601                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 602
 603 #ifdef WITH_MISDN
 604         /* deinitialize mISDN */
 605         if (created_misdn)
 606                 mISDN_deinitialize();
 607 #endif
 608
 609         /* free gsm */
 610 #if 0
 611 exit is done when interface is down
 612 #ifdef WITH_GSM_BS
 613         gsm_bs_exit(0);
 614 #endif
 615 #endif
 616 #ifdef WITH_GSM_MS
 617         gsm_ms_exit(0);
 618 #endif
 619 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 620         gsm_exit(0);
 621 #endif
 622
 623 #ifdef WITH_SIP
 624         /* cleanup SIP globals */
 625         sip_exit();
 626 #endif
 627
 628 #ifdef WITH_MISDN
 629         /* close loopback, if used by GSM or remote */
 630         if (mISDNloop.sock > -1)
 631                 mISDNloop_close();
 632 #endif
 633
 634         /* display memory leak */
 635 #define MEMCHECK(a, b) \
 636         if (b) { \
 637                 SPRINT(tracetext, a, NAME); \
 638                 start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 639                 if (ret) add_trace("blocks", NULL, "%d", b); \
 640                 end_trace(); \
 641                 printf("\n******************************\n\007"); \
 642                 printf("\nERROR: %d %s\n", b, a); \
 643                 printf("\n******************************\n"); \
 644                 ret = -1; \
 645         }
 646         MEMCHECK("",memuse)
 647         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 648         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 649         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 650         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 651         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 652         MEMCHECK("memory block(s) left (args)",amemuse)
 653         MEMCHECK("class(es) left",classuse)
 654         MEMCHECK("file descriptor(s) left",fduse)
 655         MEMCHECK("file handler(s) left",fhuse)
 656
 657         /* unlock LCR process */
 658 //      pthread_mutex_unlock(&mutex_lcr);
 659
 660         /* take me out */
 661         return(ret);
 662 }
 663
 664
 665