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 #ifdef WITH_VOOTP
 225         /* init VoOTP */
 226         vootp_init(stderr);
 227         vootp_loglevel(VOOTP_LOGL_INFO);
 228 #endif
 229
 230         /* the mutex init */
 231         if (pthread_mutex_init(&mutexd, NULL)) {
 232                 fprintf(stderr, "cannot create 'PDEBUG' mutex\n");
 233                 goto free;
 234         }
 235         created_mutexd = 1;
 236 //      if (pthread_mutex_init(&mutext, NULL)) {
 237 //              fprintf(stderr, "cannot create 'trace' mutex\n");
 238 //              goto free;
 239 //      }
 240 //      created_mutext = 1;
 241         if (pthread_mutex_init(&mutexe, NULL)) {
 242                 fprintf(stderr, "cannot create 'PERROR' mutex\n");
 243                 goto free;
 244         }
 245         created_mutexe = 1;
 246
 247         /* show interface */
 248         if (!(strcasecmp(argv[1],"interface"))) {
 249                 doc_interface();
 250                 ret = 0;
 251                 goto free;
 252         }
 253
 254         /* show rules */
 255         if (!(strcasecmp(argv[1],"rules"))) {
 256                 if (argc <= 2)
 257                         doc_rules(NULL);
 258                 else
 259                         doc_rules(argv[2]);
 260                 ret = 0;
 261                 goto free;
 262         }
 263
 264         /* query available isdn ports */
 265         if (!(strcasecmp(argv[1],"query"))) {
 266                 int __attribute__((__unused__)) rc;
 267                 fprintf(stderr, "-> Using 'misdn_info'\n");
 268                 rc = system("misdn_info");
 269                 ret = 0;
 270                 goto free;
 271         }
 272
 273         /* read options */
 274         if (read_options(options_error) == 0) {
 275                 PERROR("%s", options_error);
 276                 goto free;
 277         }
 278
 279 #ifdef WITH_MISDN
 280         /* init mISDN */
 281         if (mISDN_initialize() < 0)
 282                 goto free;
 283         created_misdn = 1;
 284 #endif
 285
 286         /* read ruleset(s) */
 287         if (!(ruleset_first = ruleset_parse()))
 288                 goto free;
 289
 290         /* set pointer to main ruleset */
 291         ruleset_main = getrulesetbyname("main");
 292         if (!ruleset_main) {
 293                 fprintf(stderr, "\n***\n -> Missing 'main' ruleset, causing ALL calls to be disconnected.\n***\n\n");
 294                 PDEBUG(DEBUG_LOG, "Missing 'main' ruleset, causing ALL calls to be disconnected.\n");
 295                 sleep(2);
 296         }
 297
 298 #if 0
 299         /* query available isdn ports */
 300         if (!(strcasecmp(argv[1],"route"))) {
 301                 ruleset_debug(ruleset_first);
 302                 ret = 0;
 303                 goto free;
 304         }
 305 #endif
 306
 307         /* do fork in special cases */
 308         if (!(strcasecmp(argv[1],"fork"))) {
 309                 pid_t pid;
 310                 FILE *pidfile;
 311
 312                 /* do daemon fork */
 313                 pid = fork();
 314
 315                 if (pid < 0) {
 316                         fprintf(stderr, "Cannot fork!\n");
 317                         goto free;
 318                 }
 319                 if (pid != 0) {
 320                         exit(0);
 321                 }
 322                 usleep(200000);
 323                 printf("\n");
 324
 325                 /* do second fork */
 326                 pid = fork();
 327
 328                 if (pid < 0) {
 329                         fprintf(stderr, "Cannot fork!\n");
 330                         goto free;
 331                 }
 332                 if (pid != 0) {
 333                         printf("LCR: Starting daemon.\n");
 334                         exit(0);
 335                 }
 336                 nooutput = 1;
 337
 338                 /* write pid file */
 339                 SPRINT(lock, "%s/lcr.pid", options.lock);
 340                 pidfile = fopen(lock,"w");
 341                 if (pidfile) {
 342                         fprintf(pidfile, "%d\n", getpid());
 343                         fclose(pidfile);
 344                 } else
 345                         fprintf(stderr, "Failed to create PID file: %s\n", lock);
 346         } else
 347         /* if not start */
 348         if (!!strcasecmp(argv[1],"start")) {
 349                 goto usage;
 350         }
 351
 352         /* create lock and lock! */
 353         SPRINT(lock, "%s/lcr.lock", options.lock);
 354         if ((lockfd = open(lock, O_CREAT | O_WRONLY, S_IWUSR)) < 0) {
 355                 fprintf(stderr, "Cannot create lock file: %s\n", lock);
 356                 fprintf(stderr, "Check options.conf to change to path with permissions for you.\n");
 357                 goto free;
 358         }
 359         if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 360                 if (errno == EWOULDBLOCK)
 361                         fprintf(stderr, "LCR: Another LCR process is running. Please kill the other one.\n");
 362                 else    fprintf(stderr, "Locking process failed: errno=%d\n", errno);
 363                 goto free;
 364         }
 365         created_lock = 1;
 366
 367         /* initialize admin socket */
 368         if (admin_init()) {
 369                 fprintf(stderr, "Unable to initialize admin socket.\n");
 370                 goto free;
 371         }
 372
 373         /* generate alaw / ulaw tables */
 374         generate_tables(options.law);
 375
 376 #ifdef WITH_SIP
 377         /* init SIP globals */
 378         sip_init();
 379 #endif
 380
 381 #ifdef WITH_SS5
 382         /* init ss5 sine tables */
 383         ss5_sine_generate();
 384         ss5_test_decode();
 385 #endif
 386
 387         /* load tones (if requested) */
 388         if (fetch_tones() == 0) {
 389                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 390                 goto free;
 391         }
 392
 393 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 394         /* init gsm */
 395         if (gsm_init()) {
 396                 fprintf(stderr, "GSM initialization failed.\n");
 397                 goto free;
 398         }
 399 #endif
 400 #if 0
 401 init is done when interface is up
 402 #ifdef WITH_GSM_BS
 403         if (gsm_bs_init()) {
 404                 fprintf(stderr, "GSM BS initialization failed.\n");
 405                 goto free;
 406         }
 407 #endif
 408 #endif
 409 #ifdef WITH_GSM_MS
 410         if (gsm_ms_init()) {
 411                 fprintf(stderr, "GSM MS initialization failed.\n");
 412                 goto free;
 413         }
 414 #endif
 415
 416         /* read interfaces and open ports */
 417         if (!read_interfaces()) {
 418                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 419                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 420                 goto free;
 421         }
 422         relink_interfaces();
 423         interface_first = interface_newlist;
 424         interface_newlist = NULL;
 425
 426         /* locking memory paging */
 427         i = 0;
 428         while(i < 10) {
 429                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 430                         break;
 431                 usleep(200000);
 432                 i++;
 433         }
 434         if (i == 10) {
 435                 switch(errno) {
 436                         case ENOMEM:
 437                         fprintf(stderr, "Warning: Not enough memory to lock paging.\n");
 438                         break;
 439                         case EPERM:
 440                         fprintf(stderr, "Warning: No permission to lock paging.\n");
 441                         break;
 442                         case EFAULT:
 443                         fprintf(stderr, "Warning: 'Bad address' while locking paging.\n");
 444                         break;
 445                         default:
 446                         fprintf(stderr, "Warning: Unknown error %d while locking paging.\n", errno);
 447                 }
 448         }
 449
 450         /* set real time scheduler & priority */
 451         if (options.schedule > 1) {
 452                 memset(&schedp, 0, sizeof(schedp));
 453                 schedp.sched_priority = options.schedule;
 454                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 455                 if (ret < 0) {
 456                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 457                         goto free;
 458                 }
 459         }
 460
 461         /* signal handlers */
 462         signal(SIGINT,sighandler);
 463         signal(SIGHUP,sighandler);
 464         signal(SIGTERM,sighandler);
 465         signal(SIGPIPE,sighandler);
 466         created_signal = 1;
 467
 468         /* init message */
 469         init_message();
 470         created_message = 1;
 471
 472         /*** main loop ***/
 473         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 474         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 475         printf("%s\n", tracetext);
 476         end_trace();
 477         quit = 0;
 478 #if 0
 479         GET_NOW();
 480 #endif
 481         while(!quit) {
 482 #if 0
 483                 last_d = now_d;
 484                 GET_NOW();
 485                 if (now_d-last_d > 1.0) {
 486                         PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
 487                 }
 488                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 489                 all_idle = 1;
 490
 491                 /* must be processed after all queues, so they are empty */
 492                 if (select_main(1, NULL, NULL, NULL))
 493                         all_idle = 0;
 494                 if (all_idle) {
 495                         usleep(10000);
 496                 }
 497 #else
 498 #ifdef WITH_SIP
 499                 if (options.polling || any_sip_interface) {
 500 #else
 501                 if (options.polling) {
 502 #endif
 503                         if (!select_main(1, NULL, NULL, NULL)) {
 504 #ifdef WITH_SIP
 505                                 /* FIXME: check if work was done */
 506                                 sip_handle();
 507 #endif
 508                                 usleep(10000);
 509                         }
 510                 } else
 511                         select_main(0, NULL, NULL, NULL);
 512 #endif
 513         }
 514         SPRINT(tracetext, "%s terminated", NAME);
 515         printf("%s\n", tracetext);
 516         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 517         if (quit > 0)
 518                 add_trace((char *)"signal", NULL, "%d", quit);
 519         if (quit < 0)
 520                 add_trace((char *)"errno", NULL, "%d", quit);
 521         end_trace();
 522         ret=0;
 523
 524         /* free all */
 525 free:
 526
 527         /* set scheduler & priority
 528          */
 529         if (options.schedule > 1) {
 530                 memset(&schedp, 0, sizeof(schedp));
 531                 schedp.sched_priority = options.schedule;
 532                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 533         }
 534         /* reset signals */
 535         if (created_signal) {
 536                 signal(SIGINT,SIG_DFL);
 537                 signal(SIGHUP,SIG_DFL);
 538                 signal(SIGTERM,SIG_DFL);
 539                 signal(SIGPIPE,SIG_DFL);
 540         }
 541
 542         /* destroy objects */
 543         while(port_first) {
 544                 debug_count++;
 545                 delete port_first;
 546         }
 547         while(epoint_first) {
 548                 debug_count++;
 549                 delete epoint_first;
 550         }
 551         epoint_first = NULL;
 552         debug_count++;
 553         join_free();
 554
 555         /* free interfaces */
 556         if (interface_first)
 557                 free_interfaces(interface_first);
 558         interface_first = NULL;
 559
 560 #ifdef WITH_MISDN
 561         /* close isdn ports */
 562         mISDNport_close_all();
 563 #endif
 564
 565         /* flush messages */
 566         debug_count++;
 567         i = 0;
 568         while ((message = message_get())) {
 569                 i++;
 570                 message_free(message);
 571         }
 572         if (i) {
 573                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 574         }
 575
 576         /* clean messages */
 577         if (created_message)
 578                 cleanup_message();
 579
 580         /* free tones */
 581         if (toneset_first)
 582                 free_tones();
 583
 584         /* free admin socket */
 585         admin_cleanup();
 586
 587         /* close lock */
 588         if (created_lock)
 589                 flock(lockfd, LOCK_UN);
 590         if (lockfd >= 0) {
 591                 if (created_lock) {
 592                         chmod(lock, 0700);
 593                         unlink(lock);
 594                 }
 595                 close(lockfd);
 596         }
 597
 598         /* free rulesets */
 599         if (ruleset_first)
 600                 ruleset_free(ruleset_first);
 601         ruleset_first = NULL;
 602
 603         /* free mutex */
 604         if (created_mutexe)
 605                 if (pthread_mutex_destroy(&mutexe))
 606                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 607 //      if (created_mutext)
 608 //              if (pthread_mutex_destroy(&mutext))
 609 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 610         if (created_mutexd)
 611                 if (pthread_mutex_destroy(&mutexd))
 612                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 613
 614 #ifdef WITH_MISDN
 615         /* deinitialize mISDN */
 616         if (created_misdn)
 617                 mISDN_deinitialize();
 618 #endif
 619
 620         /* free gsm */
 621 #if 0
 622 exit is done when interface is down
 623 #ifdef WITH_GSM_BS
 624         gsm_bs_exit(0);
 625 #endif
 626 #endif
 627 #ifdef WITH_GSM_MS
 628         gsm_ms_exit(0);
 629 #endif
 630 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 631         gsm_exit(0);
 632 #endif
 633
 634 #ifdef WITH_SIP
 635         /* cleanup SIP globals */
 636         sip_exit();
 637 #endif
 638
 639         /* display memory leak */
 640 #define MEMCHECK(a, b) \
 641         if (b) { \
 642                 SPRINT(tracetext, a, NAME); \
 643                 start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 644                 if (ret) add_trace("blocks", NULL, "%d", b); \
 645                 end_trace(); \
 646                 printf("\n******************************\n\007"); \
 647                 printf("\nERROR: %d %s\n", b, a); \
 648                 printf("\n******************************\n"); \
 649                 ret = -1; \
 650         }
 651         MEMCHECK("",memuse)
 652         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 653         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 654         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 655         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 656         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 657         MEMCHECK("memory block(s) left (args)",amemuse)
 658         MEMCHECK("class(es) left",classuse)
 659         MEMCHECK("file descriptor(s) left",fduse)
 660         MEMCHECK("file handler(s) left",fhuse)
 661
 662         /* unlock LCR process */
 663 //      pthread_mutex_unlock(&mutex_lcr);
 664
 665         /* take me out */
 666         return(ret);
 667 }
 668
 669
 670