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_debug = 0,
 185                                 created_misdn = 0, created_message = 0;
 186         char                    tracetext[256], lock[128];
 187         char                    options_error[256];
 188         int                     polling = 0;
 189
 190 #if 0
 191         /* init fdset */
 192         memset(lcr_fdset, 0, sizeof(lcr_fdset));
 193 #endif
 194
 195         /* lock LCR process */
 196 //      pthread_mutex_lock(&mutex_lcr);
 197
 198         /* show version */
 199         printf("\n** %s  Version %s\n\n", NAME, VERSION_STRING);
 200
 201         /* show options */
 202         if (argc <= 1) {
 203                 usage:
 204                 printf("\n");
 205                 printf("Usage: lcr (query | start | fork | rules | route)\n");
 206                 printf("query     = Show available isdn ports.\n");
 207                 printf("start     = Run lcr normally, abort with CTRL+C.\n");
 208                 printf("fork      = Do daemon fork and run as background process.\n");
 209                 printf("interface = Get help of available interface syntax.\n");
 210                 printf("rules     = Get help of available routing rule syntax.\n");
 211                 printf("rules [action] = Get individual help for given action.\n");
 212 //              printf("route = Show current routing as it is parsed.\n");
 213                 printf("\n");
 214                 ret = 999;
 215                 goto free;
 216         }
 217
 218         /* init crc */
 219         crc_init();
 220
 221         /* the mutex init */
 222         if (pthread_mutex_init(&mutexd, NULL)) {
 223                 fprintf(stderr, "cannot create 'PDEBUG' mutex\n");
 224                 goto free;
 225         }
 226         created_mutexd = 1;
 227 //      if (pthread_mutex_init(&mutext, NULL)) {
 228 //              fprintf(stderr, "cannot create 'trace' mutex\n");
 229 //              goto free;
 230 //      }
 231 //      created_mutext = 1;
 232         if (pthread_mutex_init(&mutexe, NULL)) {
 233                 fprintf(stderr, "cannot create 'PERROR' mutex\n");
 234                 goto free;
 235         }
 236         created_mutexe = 1;
 237
 238         /* show interface */
 239         if (!(strcasecmp(argv[1],"interface"))) {
 240                 doc_interface();
 241                 ret = 0;
 242                 goto free;
 243         }
 244
 245         /* show rules */
 246         if (!(strcasecmp(argv[1],"rules"))) {
 247                 if (argc <= 2)
 248                         doc_rules(NULL);
 249                 else
 250                         doc_rules(argv[2]);
 251                 ret = 0;
 252                 goto free;
 253         }
 254
 255         /* query available isdn ports */
 256         if (!(strcasecmp(argv[1],"query"))) {
 257                 int rc;
 258                 fprintf(stderr, "-> Using 'misdn_info'\n");
 259                 rc = system("misdn_info");
 260                 ret = 0;
 261                 goto free;
 262         }
 263
 264         /* read options */
 265         if (read_options(options_error) == 0) {
 266                 PERROR("%s", options_error);
 267                 goto free;
 268         }
 269         polling = options.polling;
 270
 271         /* init mISDN */
 272         if (mISDN_initialize() < 0)
 273                 goto free;
 274         created_misdn = 1;
 275         created_debug = 1;
 276
 277         /* read ruleset(s) */
 278         if (!(ruleset_first = ruleset_parse()))
 279                 goto free;
 280
 281         /* set pointer to main ruleset */
 282         ruleset_main = getrulesetbyname("main");
 283         if (!ruleset_main) {
 284                 fprintf(stderr, "\n***\n -> Missing 'main' ruleset, causing ALL calls to be disconnected.\n***\n\n");
 285                 PDEBUG(DEBUG_LOG, "Missing 'main' ruleset, causing ALL calls to be disconnected.\n");
 286                 sleep(2);
 287         }
 288
 289 #if 0
 290         /* query available isdn ports */
 291         if (!(strcasecmp(argv[1],"route"))) {
 292                 ruleset_debug(ruleset_first);
 293                 ret = 0;
 294                 goto free;
 295         }
 296 #endif
 297
 298         /* do fork in special cases */
 299         if (!(strcasecmp(argv[1],"fork"))) {
 300                 pid_t pid;
 301                 FILE *pidfile;
 302
 303                 /* do daemon fork */
 304                 pid = fork();
 305
 306                 if (pid < 0) {
 307                         fprintf(stderr, "Cannot fork!\n");
 308                         goto free;
 309                 }
 310                 if (pid != 0) {
 311                         exit(0);
 312                 }
 313                 usleep(200000);
 314                 printf("\n");
 315
 316                 /* do second fork */
 317                 pid = fork();
 318
 319                 if (pid < 0) {
 320                         fprintf(stderr, "Cannot fork!\n");
 321                         goto free;
 322                 }
 323                 if (pid != 0) {
 324                         printf("LCR: Starting daemon.\n");
 325                         exit(0);
 326                 }
 327                 nooutput = 1;
 328
 329                 /* write pid file */
 330                 pidfile = fopen("/var/run/lcr.pid","w");
 331                 if (pidfile) {
 332                         fprintf(pidfile, "%d\n", getpid());
 333                         fclose(pidfile);
 334                 }
 335         } else
 336         /* if not start */
 337         if (!!strcasecmp(argv[1],"start")) {
 338                 goto usage;
 339         }
 340
 341         /* create lock and lock! */
 342         SPRINT(lock, "%s/lcr.lock", options.lock);
 343         if ((lockfd = open(lock, O_CREAT | O_WRONLY, S_IWUSR)) < 0) {
 344                 fprintf(stderr, "Cannot create lock file: %s\n", lock);
 345                 fprintf(stderr, "Check options.conf to change to path with permissions for you.\n");
 346                 goto free;
 347         }
 348         if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 349                 if (errno == EWOULDBLOCK)
 350                         fprintf(stderr, "LCR: Another LCR process is running. Please kill the other one.\n");
 351                 else    fprintf(stderr, "Locking process failed: errno=%d\n", errno);
 352                 goto free;
 353         }
 354         created_lock = 1;
 355
 356         /* initialize admin socket */
 357         if (admin_init()) {
 358                 fprintf(stderr, "Unable to initialize admin socket.\n");
 359                 goto free;
 360         }
 361
 362         /* generate alaw / ulaw tables */
 363         generate_tables(options.law);
 364
 365 #ifdef WITH_SIP
 366         /* init SIP globals */
 367         sip_init();
 368         polling = 1; /* must poll, because of SIP events */
 369 #endif
 370
 371 #ifdef WITH_SS5
 372         /* init ss5 sine tables */
 373         ss5_sine_generate();
 374         ss5_test_decode();
 375 #endif
 376
 377         /* load tones (if requested) */
 378         if (fetch_tones() == 0) {
 379                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 380                 goto free;
 381         }
 382
 383 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 384         /* init gsm */
 385         if (gsm_init()) {
 386                 fprintf(stderr, "GSM initialization failed.\n");
 387                 goto free;
 388         }
 389 #endif
 390 #if 0
 391 init is done when interface is up
 392 #ifdef WITH_GSM_BS
 393         if (gsm_bs_init()) {
 394                 fprintf(stderr, "GSM BS initialization failed.\n");
 395                 goto free;
 396         }
 397 #endif
 398 #endif
 399 #ifdef WITH_GSM_MS
 400         if (gsm_ms_init()) {
 401                 fprintf(stderr, "GSM MS initialization failed.\n");
 402                 goto free;
 403         }
 404 #endif
 405
 406         /* read interfaces and open ports */
 407         if (!read_interfaces()) {
 408                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 409                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 410                 goto free;
 411         }
 412         relink_interfaces();
 413         interface_first = interface_newlist;
 414         interface_newlist = NULL;
 415
 416         /* locking memory paging */
 417         i = 0;
 418         while(i < 10) {
 419                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 420                         break;
 421                 usleep(200000);
 422                 i++;
 423         }
 424         if (i == 10) {
 425                 switch(errno) {
 426                         case ENOMEM:
 427                         fprintf(stderr, "Warning: Not enough memory to lock paging.\n");
 428                         break;
 429                         case EPERM:
 430                         fprintf(stderr, "Warning: No permission to lock paging.\n");
 431                         break;
 432                         case EFAULT:
 433                         fprintf(stderr, "Warning: 'Bad address' while locking paging.\n");
 434                         break;
 435                         default:
 436                         fprintf(stderr, "Warning: Unknown error %d while locking paging.\n", errno);
 437                 }
 438         }
 439
 440         /* set real time scheduler & priority */
 441         if (options.schedule > 1) {
 442                 memset(&schedp, 0, sizeof(schedp));
 443                 schedp.sched_priority = options.schedule;
 444                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 445                 if (ret < 0) {
 446                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 447                         goto free;
 448                 }
 449         }
 450
 451         /* signal handlers */
 452         signal(SIGINT,sighandler);
 453         signal(SIGHUP,sighandler);
 454         signal(SIGTERM,sighandler);
 455         signal(SIGPIPE,sighandler);
 456         created_signal = 1;
 457
 458         /* init message */
 459         init_message();
 460         created_message = 1;
 461
 462         /*** main loop ***/
 463         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 464         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 465         printf("%s\n", tracetext);
 466         end_trace();
 467         quit = 0;
 468 #if 0
 469         GET_NOW();
 470 #endif
 471         while(!quit) {
 472 #if 0
 473                 last_d = now_d;
 474                 GET_NOW();
 475                 if (now_d-last_d > 1.0) {
 476                         PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
 477                 }
 478                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 479                 all_idle = 1;
 480
 481                 /* must be processed after all queues, so they are empty */
 482                 if (select_main(1, NULL, NULL, NULL))
 483                         all_idle = 0;
 484                 if (all_idle) {
 485                         usleep(10000);
 486                 }
 487 #else
 488                 if (options.polling) {
 489                         if (!select_main(1, NULL, NULL, NULL)) {
 490 #ifdef WITH_SIP
 491                                 /* FIXME: check if work was done */
 492                                 sip_handle();
 493 #endif
 494                                 usleep(10000);
 495                         }
 496                 } else
 497                         select_main(0, NULL, NULL, NULL);
 498 #endif
 499         }
 500         SPRINT(tracetext, "%s terminated", NAME);
 501         printf("%s\n", tracetext);
 502         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 503         if (quit > 0)
 504                 add_trace((char *)"signal", NULL, "%d", quit);
 505         if (quit < 0)
 506                 add_trace((char *)"errno", NULL, "%d", quit);
 507         end_trace();
 508         ret=0;
 509
 510         /* free all */
 511 free:
 512
 513         /* set scheduler & priority
 514          */
 515         if (options.schedule > 1) {
 516                 memset(&schedp, 0, sizeof(schedp));
 517                 schedp.sched_priority = options.schedule;
 518                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 519         }
 520         /* reset signals */
 521         if (created_signal) {
 522                 signal(SIGINT,SIG_DFL);
 523                 signal(SIGHUP,SIG_DFL);
 524                 signal(SIGTERM,SIG_DFL);
 525                 signal(SIGPIPE,SIG_DFL);
 526         }
 527
 528         /* destroy objects */
 529         while(port_first) {
 530                 debug_count++;
 531                 delete port_first;
 532         }
 533         while(epoint_first) {
 534                 debug_count++;
 535                 delete epoint_first;
 536         }
 537         epoint_first = NULL;
 538         debug_count++;
 539         join_free();
 540
 541         /* free interfaces */
 542         if (interface_first)
 543                 free_interfaces(interface_first);
 544         interface_first = NULL;
 545
 546         /* close isdn ports */
 547         mISDNport_close_all();
 548
 549         /* flush messages */
 550         debug_count++;
 551         i = 0;
 552         while ((message = message_get())) {
 553                 i++;
 554                 message_free(message);
 555         }
 556         if (i) {
 557                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 558         }
 559
 560         /* clean messages */
 561         if (created_message)
 562                 cleanup_message();
 563
 564         /* free tones */
 565         if (toneset_first)
 566                 free_tones();
 567
 568         /* free admin socket */
 569         admin_cleanup();
 570
 571         /* close lock */
 572         if (created_lock)
 573                 flock(lockfd, LOCK_UN);
 574         if (lockfd >= 0) {
 575                 chmod(lock, 0700);
 576                 unlink(lock);
 577                 close(lockfd);
 578         }
 579
 580         /* free rulesets */
 581         if (ruleset_first)
 582                 ruleset_free(ruleset_first);
 583         ruleset_first = NULL;
 584
 585         /* free mutex */
 586         if (created_mutexe)
 587                 if (pthread_mutex_destroy(&mutexe))
 588                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 589 //      if (created_mutext)
 590 //              if (pthread_mutex_destroy(&mutext))
 591 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 592         if (created_mutexd)
 593                 if (pthread_mutex_destroy(&mutexd))
 594                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 595
 596         /* deinitialize mISDN */
 597         if (created_misdn)
 598                 mISDN_deinitialize();
 599
 600         /* free gsm */
 601 #if 0
 602 exit is done when interface is down
 603 #ifdef WITH_GSM_BS
 604         gsm_bs_exit(0);
 605 #endif
 606 #endif
 607 #ifdef WITH_GSM_MS
 608         gsm_ms_exit(0);
 609 #endif
 610 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 611         gsm_exit(0);
 612 #endif
 613
 614 #ifdef WITH_SIP
 615         /* cleanup SIP globals */
 616         sip_exit();
 617 #endif
 618
 619         /* close loopback, if used by GSM or remote */
 620         if (mISDNloop.sock > -1)
 621                 mISDNloop_close();
 622
 623         /* display memory leak */
 624 #define MEMCHECK(a, b) \
 625         if (b) { \
 626                 SPRINT(tracetext, a, NAME); \
 627                 start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 628                 if (ret) add_trace("blocks", NULL, "%d", b); \
 629                 end_trace(); \
 630                 printf("\n******************************\n\007"); \
 631                 printf("\nERROR: %d %s\n", b, a); \
 632                 printf("\n******************************\n"); \
 633                 ret = -1; \
 634         }
 635         MEMCHECK("",memuse)
 636         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 637         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 638         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 639         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 640         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 641         MEMCHECK("memory block(s) left (args)",amemuse)
 642         MEMCHECK("class(es) left",classuse)
 643         MEMCHECK("file descriptor(s) left",fduse)
 644         MEMCHECK("file handler(s) left",fhuse)
 645
 646         /* unlock LCR process */
 647 //      pthread_mutex_unlock(&mutex_lcr);
 648
 649         /* take me out */
 650         return(ret);
 651 }
 652
 653
 654