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                 SPRINT(lock, "%s/lcr.pid", options.lock);
 336                 pidfile = fopen(lock,"w");
 337                 if (pidfile) {
 338                         fprintf(pidfile, "%d\n", getpid());
 339                         fclose(pidfile);
 340                 } else
 341                         fprintf(stderr, "Failed to create PID file: %s\n", lock);
 342         } else
 343         /* if not start */
 344         if (!!strcasecmp(argv[1],"start")) {
 345                 goto usage;
 346         }
 347
 348         /* create lock and lock! */
 349         SPRINT(lock, "%s/lcr.lock", options.lock);
 350         if ((lockfd = open(lock, O_CREAT | O_WRONLY, S_IWUSR)) < 0) {
 351                 fprintf(stderr, "Cannot create lock file: %s\n", lock);
 352                 fprintf(stderr, "Check options.conf to change to path with permissions for you.\n");
 353                 goto free;
 354         }
 355         if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 356                 if (errno == EWOULDBLOCK)
 357                         fprintf(stderr, "LCR: Another LCR process is running. Please kill the other one.\n");
 358                 else    fprintf(stderr, "Locking process failed: errno=%d\n", errno);
 359                 goto free;
 360         }
 361         created_lock = 1;
 362
 363         /* initialize admin socket */
 364         if (admin_init()) {
 365                 fprintf(stderr, "Unable to initialize admin socket.\n");
 366                 goto free;
 367         }
 368
 369         /* generate alaw / ulaw tables */
 370         generate_tables(options.law);
 371
 372 #ifdef WITH_SIP
 373         /* init SIP globals */
 374         sip_init();
 375         polling = 1; /* must poll, because of SIP events */
 376 #endif
 377
 378 #ifdef WITH_SS5
 379         /* init ss5 sine tables */
 380         ss5_sine_generate();
 381         ss5_test_decode();
 382 #endif
 383
 384         /* load tones (if requested) */
 385         if (fetch_tones() == 0) {
 386                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 387                 goto free;
 388         }
 389
 390 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 391         /* init gsm */
 392         if (gsm_init()) {
 393                 fprintf(stderr, "GSM initialization failed.\n");
 394                 goto free;
 395         }
 396 #endif
 397 #if 0
 398 init is done when interface is up
 399 #ifdef WITH_GSM_BS
 400         if (gsm_bs_init()) {
 401                 fprintf(stderr, "GSM BS initialization failed.\n");
 402                 goto free;
 403         }
 404 #endif
 405 #endif
 406 #ifdef WITH_GSM_MS
 407         if (gsm_ms_init()) {
 408                 fprintf(stderr, "GSM MS initialization failed.\n");
 409                 goto free;
 410         }
 411 #endif
 412
 413         /* read interfaces and open ports */
 414         if (!read_interfaces()) {
 415                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 416                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 417                 goto free;
 418         }
 419         relink_interfaces();
 420         interface_first = interface_newlist;
 421         interface_newlist = NULL;
 422
 423         /* locking memory paging */
 424         i = 0;
 425         while(i < 10) {
 426                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 427                         break;
 428                 usleep(200000);
 429                 i++;
 430         }
 431         if (i == 10) {
 432                 switch(errno) {
 433                         case ENOMEM:
 434                         fprintf(stderr, "Warning: Not enough memory to lock paging.\n");
 435                         break;
 436                         case EPERM:
 437                         fprintf(stderr, "Warning: No permission to lock paging.\n");
 438                         break;
 439                         case EFAULT:
 440                         fprintf(stderr, "Warning: 'Bad address' while locking paging.\n");
 441                         break;
 442                         default:
 443                         fprintf(stderr, "Warning: Unknown error %d while locking paging.\n", errno);
 444                 }
 445         }
 446
 447         /* set real time scheduler & priority */
 448         if (options.schedule > 1) {
 449                 memset(&schedp, 0, sizeof(schedp));
 450                 schedp.sched_priority = options.schedule;
 451                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 452                 if (ret < 0) {
 453                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 454                         goto free;
 455                 }
 456         }
 457
 458         /* signal handlers */
 459         signal(SIGINT,sighandler);
 460         signal(SIGHUP,sighandler);
 461         signal(SIGTERM,sighandler);
 462         signal(SIGPIPE,sighandler);
 463         created_signal = 1;
 464
 465         /* init message */
 466         init_message();
 467         created_message = 1;
 468
 469         /*** main loop ***/
 470         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 471         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 472         printf("%s\n", tracetext);
 473         end_trace();
 474         quit = 0;
 475 #if 0
 476         GET_NOW();
 477 #endif
 478         while(!quit) {
 479 #if 0
 480                 last_d = now_d;
 481                 GET_NOW();
 482                 if (now_d-last_d > 1.0) {
 483                         PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
 484                 }
 485                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 486                 all_idle = 1;
 487
 488                 /* must be processed after all queues, so they are empty */
 489                 if (select_main(1, NULL, NULL, NULL))
 490                         all_idle = 0;
 491                 if (all_idle) {
 492                         usleep(10000);
 493                 }
 494 #else
 495                 if (options.polling) {
 496                         if (!select_main(1, NULL, NULL, NULL)) {
 497 #ifdef WITH_SIP
 498                                 /* FIXME: check if work was done */
 499                                 sip_handle();
 500 #endif
 501                                 usleep(10000);
 502                         }
 503                 } else
 504                         select_main(0, NULL, NULL, NULL);
 505 #endif
 506         }
 507         SPRINT(tracetext, "%s terminated", NAME);
 508         printf("%s\n", tracetext);
 509         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 510         if (quit > 0)
 511                 add_trace((char *)"signal", NULL, "%d", quit);
 512         if (quit < 0)
 513                 add_trace((char *)"errno", NULL, "%d", quit);
 514         end_trace();
 515         ret=0;
 516
 517         /* free all */
 518 free:
 519
 520         /* set scheduler & priority
 521          */
 522         if (options.schedule > 1) {
 523                 memset(&schedp, 0, sizeof(schedp));
 524                 schedp.sched_priority = options.schedule;
 525                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 526         }
 527         /* reset signals */
 528         if (created_signal) {
 529                 signal(SIGINT,SIG_DFL);
 530                 signal(SIGHUP,SIG_DFL);
 531                 signal(SIGTERM,SIG_DFL);
 532                 signal(SIGPIPE,SIG_DFL);
 533         }
 534
 535         /* destroy objects */
 536         while(port_first) {
 537                 debug_count++;
 538                 delete port_first;
 539         }
 540         while(epoint_first) {
 541                 debug_count++;
 542                 delete epoint_first;
 543         }
 544         epoint_first = NULL;
 545         debug_count++;
 546         join_free();
 547
 548         /* free interfaces */
 549         if (interface_first)
 550                 free_interfaces(interface_first);
 551         interface_first = NULL;
 552
 553 #ifdef WITH_MISDN
 554         /* close isdn ports */
 555         mISDNport_close_all();
 556 #endif
 557
 558         /* flush messages */
 559         debug_count++;
 560         i = 0;
 561         while ((message = message_get())) {
 562                 i++;
 563                 message_free(message);
 564         }
 565         if (i) {
 566                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 567         }
 568
 569         /* clean messages */
 570         if (created_message)
 571                 cleanup_message();
 572
 573         /* free tones */
 574         if (toneset_first)
 575                 free_tones();
 576
 577         /* free admin socket */
 578         admin_cleanup();
 579
 580         /* close lock */
 581         if (created_lock)
 582                 flock(lockfd, LOCK_UN);
 583         if (lockfd >= 0) {
 584                 chmod(lock, 0700);
 585                 unlink(lock);
 586                 close(lockfd);
 587         }
 588
 589         /* free rulesets */
 590         if (ruleset_first)
 591                 ruleset_free(ruleset_first);
 592         ruleset_first = NULL;
 593
 594         /* free mutex */
 595         if (created_mutexe)
 596                 if (pthread_mutex_destroy(&mutexe))
 597                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 598 //      if (created_mutext)
 599 //              if (pthread_mutex_destroy(&mutext))
 600 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 601         if (created_mutexd)
 602                 if (pthread_mutex_destroy(&mutexd))
 603                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 604
 605 #ifdef WITH_MISDN
 606         /* deinitialize mISDN */
 607         if (created_misdn)
 608                 mISDN_deinitialize();
 609 #endif
 610
 611         /* free gsm */
 612 #if 0
 613 exit is done when interface is down
 614 #ifdef WITH_GSM_BS
 615         gsm_bs_exit(0);
 616 #endif
 617 #endif
 618 #ifdef WITH_GSM_MS
 619         gsm_ms_exit(0);
 620 #endif
 621 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 622         gsm_exit(0);
 623 #endif
 624
 625 #ifdef WITH_SIP
 626         /* cleanup SIP globals */
 627         sip_exit();
 628 #endif
 629
 630 #ifdef WITH_MISDN
 631         /* close loopback, if used by GSM or remote */
 632         if (mISDNloop.sock > -1)
 633                 mISDNloop_close();
 634 #endif
 635
 636         /* display memory leak */
 637 #define MEMCHECK(a, b) \
 638         if (b) { \
 639                 SPRINT(tracetext, a, NAME); \
 640                 start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 641                 if (ret) add_trace("blocks", NULL, "%d", b); \
 642                 end_trace(); \
 643                 printf("\n******************************\n\007"); \
 644                 printf("\nERROR: %d %s\n", b, a); \
 645                 printf("\n******************************\n"); \
 646                 ret = -1; \
 647         }
 648         MEMCHECK("",memuse)
 649         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 650         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 651         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 652         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 653         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 654         MEMCHECK("memory block(s) left (args)",amemuse)
 655         MEMCHECK("class(es) left",classuse)
 656         MEMCHECK("file descriptor(s) left",fduse)
 657         MEMCHECK("file handler(s) left",fhuse)
 658
 659         /* unlock LCR process */
 660 //      pthread_mutex_unlock(&mutex_lcr);
 661
 662         /* take me out */
 663         return(ret);
 664 }
 665
 666
 667