main.c

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** Linux Call Router                                                         **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** Main function                                                             **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <sys/types.h>
  16 #include <sys/wait.h>
  17 #include <sys/stat.h>
  18 #include <unistd.h>
  19 #include <signal.h>
  20 #include <stdarg.h>
  21 #include <fcntl.h>
  22 #include <sys/ioctl.h>
  23 #include <sys/file.h>
  24 #include <errno.h>
  25 #include <sys/mman.h>
  26 #include <sys/resource.h>
  27 #include "main.h"
  28
  29 MESSAGES
  30
  31 double now_d;
  32 time_t now;
  33 struct tm *now_tm;
  34 struct timeval now_tv;
  35 struct timezone now_tz;
  36 #define GET_NOW() \
  37         { \
  38                 gettimeofday(&now_tv, &now_tz); \
  39                 now_d = ((double)(now_tv.tv_usec))/1000000 + now_tv.tv_sec; \
  40                 now = now_tv.tv_sec; \
  41                 now_tm = localtime(&now); \
  42         }
  43 //#define DEBUG_DURATION
  44
  45 int global_debug = 0;
  46 int quit=0;
  47
  48 pthread_mutex_t mutexd; // debug output mutex
  49 //pthread_mutex_t mutext; // trace output mutex
  50 pthread_mutex_t mutexe; // error output mutex
  51
  52 int memuse = 0;
  53 int mmemuse = 0;
  54 int cmemuse = 0;
  55 int ememuse = 0;
  56 int pmemuse = 0;
  57 int amemuse = 0;
  58 int rmemuse = 0;
  59 int classuse = 0;
  60 int fduse = 0;
  61 int fhuse = 0;
  62
  63 char *debug_prefix = 0;
  64 int debug_count = 0;
  65 int last_debug = 0;
  66 int debug_newline = 1;
  67 int nooutput = 0;
  68
  69 void debug_usleep(int msec, char *file, int line, int hour, int min, int sec)
  70 {
  71         usleep(msec);
  72 }
  73
  74 void debug(const char *function, int line, char *prefix, char *buffer)
  75 {
  76         /* if we have a new debug count, we add a mark */
  77         if (last_debug != debug_count)
  78         {
  79                 last_debug = debug_count;
  80                 if (!nooutput)
  81                         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);
  82                 if (options.deb&DEBUG_LOG && global_debug)
  83                         dprint(DBGM_MAN, 0, "--------------------- %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);
  84         }
  85
  86         if (!nooutput)
  87         {
  88                 if (debug_newline)
  89                         printf("\033[32m%06d %s\033[37m%s", debug_count%1000000, prefix?prefix:"", prefix?" ":"");
  90                 if (function)
  91                         printf("(in %s() line %d): %s", function, line, buffer);
  92                 else
  93                         printf("%s", buffer);
  94         }
  95
  96         if (options.deb&DEBUG_LOG && global_debug)
  97         {
  98                 if (debug_newline)
  99                 {
 100                         if (function)
 101                                 dprint(DBGM_MAN, 0, "%s%s(in %s() line %d): %s", prefix?prefix:"", prefix?" ":"", function, line, buffer);
 102                         else
 103                                 dprint(DBGM_MAN, 0, "%s%s: %s", prefix?prefix:"", prefix?" ":"", buffer);
 104                 }
 105         }
 106
 107         debug_newline = 0;
 108         if (buffer[0])
 109                 if (buffer[strlen(buffer)-1] == '\n')
 110                         debug_newline = 1;
 111 }
 112
 113
 114 void _printdebug(const char *function, int line, unsigned long mask, const char *fmt, ...)
 115 {
 116         char buffer[4096];
 117         va_list args;
 118
 119         if (!(options.deb & mask))
 120                 return;
 121         pthread_mutex_lock(&mutexd);
 122
 123         va_start(args,fmt);
 124         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 125         buffer[sizeof(buffer)-1]=0;
 126         va_end(args);
 127
 128         debug(function, line, debug_prefix, buffer);
 129
 130         pthread_mutex_unlock(&mutexd);
 131 }
 132
 133 void _printerror(const char *function, int line, const char *fmt, ...)
 134 {
 135         char buffer[4096];
 136         va_list args;
 137
 138         pthread_mutex_lock(&mutexe);
 139
 140         va_start(args,fmt);
 141         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 142         buffer[sizeof(buffer)-1]=0;
 143         va_end(args);
 144
 145         if (options.deb)
 146                 debug(function, line, "ERROR", buffer);
 147         else /* only if we do not debug */
 148         {
 149                 if (function)
 150                         fprintf(stderr, "ERROR (in %s() line %d) %s", function, line, buffer);
 151                 else
 152                         fprintf(stderr, "ERROR %s", buffer);
 153         }
 154
 155         pthread_mutex_unlock(&mutexe);
 156 }
 157
 158
 159 void sighandler(int sigset)
 160 {
 161         struct sched_param schedp;
 162
 163         if (sigset == SIGHUP)
 164                 return;
 165         if (sigset == SIGPIPE)
 166                 return;
 167         if (!quit)
 168         {
 169                 quit=1;
 170                 /* set scheduler & priority */
 171                 if (options.schedule > 1)
 172                 {
 173                         memset(&schedp, 0, sizeof(schedp));
 174                         schedp.sched_priority = 0;
 175                         sched_setscheduler(0, SCHED_OTHER, &schedp);
 176                 }
 177                 fprintf(stderr, "LCR: Signal received: %d\n", sigset);
 178                 PERROR("Signal received: %d\n", sigset);
 179         }
 180 }
 181
 182
 183 /*
 184  * the main
 185  */
 186 int main(int argc, char *argv[])
 187 {
 188         int                     ret = -1;
 189         int                     lockfd = -1; /* file lock */
 190         struct message          *message;
 191         class Port              *port;
 192         class Endpoint          *epoint;
 193         class Join              *join;
 194         int                     i;
 195         int                     all_idle;
 196         char                    prefix_string[64];
 197         struct sched_param      schedp;
 198         char                    *debug_prefix = "alloc";
 199         int                     created_mutexd = 0,/* created_mutext = 0,*/ created_mutexe = 0,
 200                                 created_lock = 0, created_signal = 0, created_debug = 0;
 201 #ifdef DEBUG_DURATION
 202         time_t                  durationupdate;
 203         double                  idle_duration, isdn_duration, port_duration, epoint_duration, join_duration, message_duration, admin_duration;
 204         double                  start_d;
 205 #endif
 206         int                     idletime = 0, idlecheck = 0;
 207         char                    tracetext[256];
 208
 209         /* current time */
 210         GET_NOW();
 211
 212         /* show version */
 213         printf("\n** %s  Version %s\n\n", NAME, VERSION_STRING);
 214
 215         /* show options */
 216         if (argc <= 1)
 217         {
 218                 usage:
 219                 printf("\n");
 220                 printf("Usage: lcr (query | start | fork | rules | route)\n");
 221                 printf("query     = Show available isdn ports.\n");
 222                 printf("start     = Run lcr normally, abort with CTRL+C.\n");
 223                 printf("fork      = Do daemon fork and run as background process.\n");
 224                 printf("interface = Get help of available interface syntax.\n");
 225                 printf("rules     = Get help of available routing rule syntax.\n");
 226                 printf("rules [action] = Get individual help for given action.\n");
 227 //              printf("route = Show current routing as it is parsed.\n");
 228                 printf("\n");
 229                 ret = 999;
 230                 goto free;
 231         }
 232
 233         /* init crc */
 234         crc_init();
 235
 236         /* check for root (real or effective) */
 237         if (getuid() && geteuid())
 238         {
 239                 fprintf(stderr, "Please run %s as super-user.\n", NAME);
 240                 goto free;
 241         }
 242
 243         /* the mutex init */
 244         if (pthread_mutex_init(&mutexd, NULL))
 245         {
 246                 fprintf(stderr, "cannot create 'PDEBUG' mutex\n");
 247                 goto free;
 248         }
 249         created_mutexd = 1;
 250 //      if (pthread_mutex_init(&mutext, NULL))
 251 //      {
 252 //              fprintf(stderr, "cannot create 'trace' mutex\n");
 253 //              goto free;
 254 //      }
 255 //      created_mutext = 1;
 256         if (pthread_mutex_init(&mutexe, NULL))
 257         {
 258                 fprintf(stderr, "cannot create 'PERROR' mutex\n");
 259                 goto free;
 260         }
 261         created_mutexe = 1;
 262
 263         /* show interface */
 264         if (!(strcasecmp(argv[1],"interface")))
 265         {
 266                 doc_interface();
 267                 ret = 0;
 268                 goto free;
 269         }
 270
 271         /* show rules */
 272         if (!(strcasecmp(argv[1],"rules")))
 273         {
 274                 if (argc <= 2)
 275                         doc_rules(NULL);
 276                 else
 277                         doc_rules(argv[2]);
 278                 ret = 0;
 279                 goto free;
 280         }
 281
 282         /* query available isdn ports */
 283         if (!(strcasecmp(argv[1],"query")))
 284         {
 285                 mISDN_port_info();
 286                 ret = 0;
 287                 goto free;
 288         }
 289
 290         /* read options */
 291         if (read_options() == 0)
 292                 goto free;
 293
 294         /* init mISDN */
 295         if (mISDN_initialize() < 0)
 296                 goto free;
 297         created_debug = 1;
 298
 299         /* read ruleset(s) */
 300         if (!(ruleset_first = ruleset_parse()))
 301                 goto free;
 302
 303         /* set pointer to main ruleset */
 304         ruleset_main = getrulesetbyname("main");
 305         if (!ruleset_main)
 306         {
 307                 fprintf(stderr, "\n***\n -> Missing 'main' ruleset, causing ALL calls to be disconnected.\n***\n\n");
 308                 PDEBUG(DEBUG_LOG, "Missing 'main' ruleset, causing ALL calls to be disconnected.\n");
 309                 sleep(2);
 310         }
 311
 312 #if 0
 313         /* query available isdn ports */
 314         if (!(strcasecmp(argv[1],"route")))
 315         {
 316                 ruleset_debug(ruleset_first);
 317                 ret = 0;
 318                 goto free;
 319         }
 320 #endif
 321
 322         /* do fork in special cases */
 323         if (!(strcasecmp(argv[1],"fork")))
 324         {
 325                 pid_t pid;
 326
 327                 /* do daemon fork */
 328                 pid = fork();
 329
 330                 if (pid < 0)
 331                 {
 332                         fprintf(stderr, "Cannot fork!\n");
 333                         goto free;
 334                 }
 335                 if (pid != 0)
 336                 {
 337                         exit(0);
 338                 }
 339                 usleep(200000);
 340                 printf("\n");
 341
 342                 /* do second fork */
 343                 pid = fork();
 344
 345                 if (pid < 0)
 346                 {
 347                         fprintf(stderr, "Cannot fork!\n");
 348                         goto free;
 349                 }
 350                 if (pid != 0)
 351                 {
 352                         printf("LCR: Starting daemon.\n");
 353                         exit(0);
 354                 }
 355                 nooutput = 1;
 356         } else
 357         /* if not start */
 358         if (!!strcasecmp(argv[1],"start"))
 359         {
 360                 goto usage;
 361         }
 362
 363         /* create lock and lock! */
 364         if ((lockfd = open("/var/run/lcr.lock", O_CREAT, 0)) < 0)
 365         {
 366                 fprintf(stderr, "Cannot create lock file: /var/run/lcr.lock\n");
 367                 goto free;
 368         }
 369         if (flock(lockfd, LOCK_EX|LOCK_NB) < 0)
 370         {
 371                 if (errno == EWOULDBLOCK)
 372                         fprintf(stderr, "LCR: Another LCR process is running. Please kill the other one.\n");
 373                 else    fprintf(stderr, "Locking process failed: errno=%d\n", errno);
 374                 goto free;
 375         }
 376         created_lock = 1;
 377
 378         /* initialize admin socket */
 379         if (admin_init())
 380         {
 381                 fprintf(stderr, "Unable to initialize admin socket.\n");
 382                 goto free;
 383         }
 384
 385         /* generate alaw / ulaw tables */
 386         generate_tables(options.law);
 387
 388         /* load tones (if requested) */
 389         if (fetch_tones() == 0)
 390         {
 391                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 392                 goto free;
 393         }
 394
 395         /* read interfaces and open ports */
 396         if (!read_interfaces())
 397         {
 398                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 399                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 400                 goto free;
 401         }
 402         relink_interfaces();
 403         interface_first = interface_newlist;
 404         interface_newlist = NULL;
 405
 406         /* locking memory paging */
 407         i = 0;
 408         while(i < 10)
 409         {
 410                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 411                         break;
 412                 usleep(200000);
 413                 i++;
 414         }
 415         if (i == 10)
 416         {
 417                 switch(errno)
 418                 {
 419                         case ENOMEM:
 420                         fprintf(stderr, "Not enough memory to lock paging, exitting...\n");
 421                         break;
 422                         case EPERM:
 423                         fprintf(stderr, "No permission to lock paging, exitting...\n");
 424                         break;
 425                         case EFAULT:
 426                         fprintf(stderr, "'Bad address' while locking paging, exitting...\n");
 427                         break;
 428                         default:
 429                         fprintf(stderr, "Unknown error %d while locking paging, exitting...\n", errno);
 430                 }
 431                 goto free;
 432         }
 433
 434         /* set real time scheduler & priority */
 435         if (options.schedule > 1)
 436         {
 437                 memset(&schedp, 0, sizeof(schedp));
 438                 schedp.sched_priority = options.schedule;
 439                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 440                 if (ret < 0)
 441                 {
 442                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 443                         goto free;
 444                 }
 445         }
 446
 447         /* signal handlers */
 448         signal(SIGINT,sighandler);
 449         signal(SIGHUP,sighandler);
 450         signal(SIGTERM,sighandler);
 451         signal(SIGPIPE,sighandler);
 452         created_signal = 1;
 453
 454         /*** main loop ***/
 455         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 456         start_trace(0, NULL, NULL, NULL, 0, 0, 0, tracetext);
 457         printf("%s\n", tracetext);
 458         end_trace();
 459         GET_NOW();
 460 #ifdef DEBUG_DURATION
 461         start_d = now_d;
 462         durationupdate = now;
 463         idle_duration = isdn_duration = port_duration = epoint_duration = call_duration = message_duration = admin_duration = 0;
 464 #endif
 465         quit = 0;
 466         while(!quit)
 467         {
 468                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 469                 all_idle = 1;
 470
 471 #warning debugging usleep crash
 472                 debug_usleep(1, __FILE__, __LINE__, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec);
 473
 474                 /* handle mISDN messages from kernel */
 475                 debug_prefix = "ISDN";
 476                 if (mISDN_handler())
 477                         all_idle = 0;
 478 #warning debugging usleep crash
 479                 debug_usleep(1, __FILE__, __LINE__, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec);
 480
 481 #ifdef DEBUG_DURATION
 482                 GET_NOW();
 483                 isdn_duration += (now_d - start_d);
 484                 start_d = now_d;
 485 #endif
 486 BUDETECT
 487
 488                 /* loop through all port ports and call their handler */
 489                 port_again:
 490                 port = port_first;
 491                 while(port)
 492                 {
 493                         debug_prefix = port->p_name;
 494                         debug_count++;
 495                         ret = port->handler();
 496                         if (ret)
 497                                 all_idle = 0;
 498                         if (ret < 0) /* port has been destroyed */
 499                                 goto port_again;
 500                         port = port->next;
 501                 }
 502 #ifdef DEBUG_DURATION
 503                 GET_NOW();
 504                 port_duration += (now_d - start_d);
 505                 start_d = now_d;
 506 #endif
 507
 508                 /* loop through all epoint and call their handler */
 509                 epoint_again:
 510                 epoint = epoint_first;
 511                 while(epoint)
 512                 {
 513                         debug_prefix = prefix_string;
 514                         SPRINT(prefix_string, "ep%ld", epoint->ep_serial);
 515                         debug_count++;
 516                         ret = epoint->handler();
 517                         if (ret)
 518                                 all_idle = 0;
 519                         if (ret < 0) /* epoint has been destroyed */
 520                                 goto epoint_again;
 521                         epoint = epoint->next;
 522                 }
 523 #ifdef DEBUG_DURATION
 524                 GET_NOW();
 525                 epoint_duration += (now_d - start_d);
 526                 start_d = now_d;
 527 #endif
 528
 529                 /* loop through all joins and call their handler */
 530                 join_again:
 531                 join = join_first;
 532                 while(join)
 533                 {
 534                         debug_prefix = "join";
 535                         debug_count++;
 536                         ret = join->handler();
 537                         if (ret)
 538                                 all_idle = 0;
 539                         if (ret < 0) /* join has been destroyed */
 540                                 goto join_again;
 541                         join = join->next;
 542                 }
 543 #ifdef DEBUG_DURATION
 544                 GET_NOW();
 545                 join_duration += (now_d - start_d);
 546                 start_d = now_d;
 547 #endif
 548
 549                 debug_prefix = 0;
 550
 551                 /* process any message */
 552                 debug_count++;
 553                 debug_prefix = "message";
 554                 while ((message = message_get()))
 555                 {
 556                         all_idle = 0;
 557                         switch(message->flow)
 558                         {
 559                                 case PORT_TO_EPOINT:
 560                                 debug_prefix = "msg port->epoint";
 561                                 epoint = find_epoint_id(message->id_to);
 562                                 if (epoint)
 563                                 {
 564                                         if (epoint->ep_app)
 565                                         {
 566                                                 epoint->ep_app->ea_message_port(message->id_from, message->type, &message->param);
 567                                         } else
 568                                         {
 569                                                 PDEBUG(DEBUG_MSG, "Warning: message %s from port %d to endpoint %d. endpoint doesn't have an application.\n", messages_txt[message->type], message->id_from, message->id_to);
 570                                         }
 571                                 } else
 572                                 {
 573                                         PDEBUG(DEBUG_MSG, "Warning: message %s from port %d to endpoint %d. endpoint doesn't exist anymore.\n", messages_txt[message->type], message->id_from, message->id_to);
 574                                 }
 575                                 break;
 576
 577                                 case EPOINT_TO_JOIN:
 578                                 debug_prefix = "msg epoint->join";
 579                                 join = find_join_id(message->id_to);
 580                                 if (join)
 581                                 {
 582                                         join->message_epoint(message->id_from, message->type, &message->param);
 583                                 } else
 584                                 {
 585                                         PDEBUG(DEBUG_MSG, "Warning: message %s from endpoint %d to join %d. join doesn't exist anymore\n", messages_txt[message->type], message->id_from, message->id_to);
 586                                 }
 587                                 break;
 588
 589                                 case JOIN_TO_EPOINT:
 590                                 debug_prefix = "msg join->epoint";
 591                                 epoint = find_epoint_id(message->id_to);
 592                                 if (epoint)
 593                                 {
 594                                         if (epoint->ep_app)
 595                                         {
 596                                                 epoint->ep_app->ea_message_join(message->id_from, message->type, &message->param);
 597                                         } else
 598                                         {
 599                                                 PDEBUG(DEBUG_MSG, "Warning: message %s from join %d to endpoint %d. endpoint doesn't have an application.\n", messages_txt[message->type], message->id_from, message->id_to);
 600                                         }
 601                                 } else
 602                                 {
 603                                         PDEBUG(DEBUG_MSG, "Warning: message %s from join %d to endpoint %d. endpoint doesn't exist anymore.\n", messages_txt[message->type], message->id_from, message->id_to);
 604                                 }
 605                                 break;
 606
 607                                 case EPOINT_TO_PORT:
 608                                 debug_prefix = "msg epoint->port";
 609                                 port = find_port_id(message->id_to);
 610                                 if (port)
 611                                 {
 612                                         port->message_epoint(message->id_from, message->type, &message->param);
 613 BUDETECT
 614                                 } else
 615                                 {
 616                                         PDEBUG(DEBUG_MSG, "Warning: message %s from endpoint %d to port %d. port doesn't exist anymore\n", messages_txt[message->type], message->id_from, message->id_to);
 617                                 }
 618                                 break;
 619
 620                                 default:
 621                                 PERROR("Message flow %d unknown.\n", message->flow);
 622                         }
 623                         message_free(message);
 624                         debug_count++;
 625                         debug_prefix = "message";
 626                 }
 627 #ifdef DEBUG_DURATION
 628                 GET_NOW();
 629                 message_duration += (now_d - start_d);
 630                 start_d = now_d;
 631 #endif
 632 BUDETECT
 633
 634                 /* handle socket */
 635                 if (admin_handle())
 636                         all_idle = 0;
 637 #ifdef DEBUG_DURATION
 638                 GET_NOW();
 639                 admin_duration += (now_d - start_d);
 640                 start_d = now_d;
 641 #endif
 642 BUDETECT
 643
 644 #if 0
 645                 /* check for child to exit (eliminate zombies) */
 646                 if (waitpid(-1, NULL, WNOHANG) > 0)
 647                 {
 648                         PDEBUG(DEBUG_EPOINT, "a child process (created by endpoint) has exitted.\n");
 649                         all_idle = 0;
 650                 }
 651 #endif
 652 #warning debugging usleep crash
 653                 debug_usleep(1, __FILE__, __LINE__, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec);
 654
 655                 /* do idle checking */
 656                 if (idlecheck != now)
 657                 {
 658                         PDEBUG(DEBUG_IDLETIME, "Idle time : %d%%\n", idletime/10000);
 659                         idletime = 0;
 660                         idlecheck = now;
 661                 }
 662 #ifdef DEBUG_DURATION
 663                 GET_NOW();
 664                 idle_duration += (now_d - start_d);
 665                 start_d = now_d;
 666                 if (durationupdate != now)
 667                 {
 668                         durationupdate = now;
 669                         printf("Idle:%3d ISDN:%3d Port:%3d Epoint:%3d Join:%3d Message:%3d Admin:%3d\n",
 670                                 (int)(idle_duration*100),
 671                                 (int)(isdn_duration*100),
 672                                 (int)(port_duration*100),
 673                                 (int)(epoint_duration*100),
 674                                 (int)(join_duration*100),
 675                                 (int)(message_duration*100),
 676                                 (int)(admin_duration*100));
 677                         idle_duration = isdn_duration = port_duration = epoint_duration = join_duration = message_duration = admin_duration = 0;
 678                 }
 679 #else
 680                 GET_NOW();
 681 #endif
 682
 683                 /* did we do nothing? so we wait to give time to other processes */
 684                 if (all_idle)
 685                 {
 686                         debug_usleep(4000, __FILE__, __LINE__, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec);
 687                         idletime += 4000;
 688                 }
 689         }
 690         SPRINT(tracetext, "%s terminated", NAME);
 691         printf("%s\n", tracetext);
 692         start_trace(0, NULL, NULL, NULL, 0, 0, 0, tracetext);
 693         if (ret)
 694                 add_trace("error", NULL, "%d", ret);
 695         end_trace();
 696         ret=0;
 697
 698         /* free all */
 699 free:
 700
 701
 702         /* set scheduler & priority
 703          */
 704         if (options.schedule > 1)
 705         {
 706                 memset(&schedp, 0, sizeof(schedp));
 707                 schedp.sched_priority = 0;
 708                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 709         }
 710         /* reset signals */
 711         if (created_signal)
 712         {
 713                 signal(SIGINT,SIG_DFL);
 714                 signal(SIGHUP,SIG_DFL);
 715                 signal(SIGTERM,SIG_DFL);
 716                 signal(SIGPIPE,SIG_DFL);
 717         }
 718
 719         /* destroy objects */
 720         debug_prefix = "free";
 721
 722         while(port_first)
 723         {
 724                 debug_count++;
 725                 delete port_first;
 726         }
 727         while(epoint_first)
 728         {
 729                 debug_count++;
 730                 delete epoint_first;
 731         }
 732         epoint_first = NULL;
 733         debug_count++;
 734         join_free();
 735
 736         /* free interfaces */
 737         if (interface_first)
 738                 free_interfaces(interface_first);
 739         interface_first = NULL;
 740
 741         /* close isdn ports */
 742         mISDNport_close_all();
 743
 744         /* flush messages */
 745         debug_count++;
 746         i = 0;
 747         while ((message = message_get()))
 748         {
 749                 i++;
 750                 message_free(message);
 751         }
 752         if (i)
 753         {
 754                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 755         }
 756
 757         /* free tones */
 758         if (toneset_first)
 759                 free_tones();
 760
 761         /* free admin socket */
 762         admin_cleanup();
 763
 764         /* close lock */
 765         if (created_lock)
 766                 flock(lockfd, LOCK_UN);
 767         if (lockfd >= 0)
 768                 close(lockfd);
 769
 770         /* free rulesets */
 771         if (ruleset_first)
 772                 ruleset_free(ruleset_first);
 773         ruleset_first = NULL;
 774
 775         /* free mutex */
 776         if (created_mutexe)
 777                 if (pthread_mutex_destroy(&mutexe))
 778                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 779 //      if (created_mutext)
 780 //              if (pthread_mutex_destroy(&mutext))
 781 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 782         if (created_mutexd)
 783                 if (pthread_mutex_destroy(&mutexd))
 784                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 785
 786         /* deinitialize mISDN */
 787         mISDN_deinitialize();
 788         global_debug = 0;
 789
 790         /* display memory leak */
 791 #define MEMCHECK(a, b) \
 792         if (b) \
 793         { \
 794                 SPRINT(tracetext, a, NAME); \
 795                 start_trace(0, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 796                 if (ret) add_trace("blocks", NULL, "%d", b); \
 797                 end_trace(); \
 798                 printf("\n******************************\n\007"); \
 799                 printf("\nERROR: %d %s\n", b, a); \
 800                 printf("\n******************************\n"); \
 801                 ret = -1; \
 802         }
 803         MEMCHECK("",memuse)
 804         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 805         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 806         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 807         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 808         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 809         MEMCHECK("memory block(s) left (args)",amemuse)
 810         MEMCHECK("class(es) left",classuse)
 811         MEMCHECK("file descriptor(s) left",fduse)
 812         MEMCHECK("file handler(s) left",fhuse)
 813
 814         /* take me out */
 815         return(ret);
 816 }
 817
 818
 819 #ifdef BUDETECT_DEF
 820 /* special debug function to detect buffer overflow
 821  */
 822 int budetect_stop = 0;
 823 void budetect(const char *file, int line, char *function)
 824 {
 825         if (budetect_stop)
 826                 return;
 827         /* modify this function to detect race-bugs */
 828 #warning DID YOU MODIFY THIS FUNCTION TO DETECT THE BUFFER OVERFLOW BUG?
 829         class Port *port;
 830         class PmISDN *pmisdn;
 831         struct mISDNport *mISDNport = mISDNport_first;
 832         int i, ii;
 833
 834         while(mISDNport)
 835         {
 836                 i = 0;
 837                 ii = mISDNport->b_num;
 838                 while(i < ii)
 839                 {
 840                         if (mISDNport->b_port[i])
 841                         {
 842                                 port = port_first;
 843                                 while(port)
 844                                 {
 845                                         if ((port->p_type&PORT_CLASS_MASK) == PORT_CLASS_ISDN)
 846                                         {
 847                                                 pmisdn = (class PmISDN *)port;
 848                                                 if (pmisdn->p_isdn_crypt_listen)
 849                                                 {
 850                                                         PERROR_RUNTIME("************************************************\n");
 851                                                         PERROR_RUNTIME("** BUG detected in %s, line %d, function %s\n", file, line, function);
 852                                                         PERROR_RUNTIME("** p_isdn_crypt_listen = %d\n", pmisdn->p_isdn_crypt_listen);
 853                                                         PERROR_RUNTIME("************************************************\n");
 854                                                         budetect_stop = 1;
 855                                                 }
 856                                         }
 857                                         if (port == mISDNport->b_port[i])
 858                                                 break;
 859                                         port = port->next;
 860                                         if (!port)
 861                                         {
 862                                                 PERROR_RUNTIME("************************************************\n");
 863                                                 PERROR_RUNTIME("** BUG detected in %s, line %d, function %s\n", file, line, function);
 864                                                 PERROR_RUNTIME("** b_port not in list.\n");
 865                                                 PERROR_RUNTIME("************************************************\n");
 866                                                 budetect_stop = 1;
 867                                         }
 868                                 }
 869                         }
 870                         i++;
 871                 }
 872                 mISDNport = mISDNport->next;
 873         }
 874
 875 }
 876 #endif
 877