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 *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() line %d): %s", 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 *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(function, line, "DEBUG", buffer);
 113
 114         pthread_mutex_unlock(&mutexd);
 115 }
 116
 117 void _printerror(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(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;
 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_SS5
 366         /* init ss5 sine tables */
 367         ss5_sine_generate();
 368         ss5_test_decode();
 369 #endif
 370
 371         /* load tones (if requested) */
 372         if (fetch_tones() == 0) {
 373                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 374                 goto free;
 375         }
 376
 377 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 378         /* init gsm */
 379         if (gsm_init()) {
 380                 fprintf(stderr, "GSM initialization failed.\n");
 381                 goto free;
 382         }
 383 #endif
 384 #if 0
 385 init is done when interface is up
 386 #ifdef WITH_GSM_BS
 387         if (gsm_bs_init()) {
 388                 fprintf(stderr, "GSM BS initialization failed.\n");
 389                 goto free;
 390         }
 391 #endif
 392 #endif
 393 #ifdef WITH_GSM_MS
 394         if (gsm_ms_init()) {
 395                 fprintf(stderr, "GSM MS initialization failed.\n");
 396                 goto free;
 397         }
 398 #endif
 399
 400         /* read interfaces and open ports */
 401         if (!read_interfaces()) {
 402                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 403                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 404                 goto free;
 405         }
 406         relink_interfaces();
 407         interface_first = interface_newlist;
 408         interface_newlist = NULL;
 409
 410         /* locking memory paging */
 411         i = 0;
 412         while(i < 10) {
 413                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 414                         break;
 415                 usleep(200000);
 416                 i++;
 417         }
 418         if (i == 10) {
 419                 switch(errno) {
 420                         case ENOMEM:
 421                         fprintf(stderr, "Warning: Not enough memory to lock paging.\n");
 422                         break;
 423                         case EPERM:
 424                         fprintf(stderr, "Warning: No permission to lock paging.\n");
 425                         break;
 426                         case EFAULT:
 427                         fprintf(stderr, "Warning: 'Bad address' while locking paging.\n");
 428                         break;
 429                         default:
 430                         fprintf(stderr, "Warning: Unknown error %d while locking paging.\n", errno);
 431                 }
 432         }
 433
 434         /* set real time scheduler & priority */
 435         if (options.schedule > 1) {
 436                 memset(&schedp, 0, sizeof(schedp));
 437                 schedp.sched_priority = options.schedule;
 438                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 439                 if (ret < 0) {
 440                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 441                         goto free;
 442                 }
 443         }
 444
 445         /* signal handlers */
 446         signal(SIGINT,sighandler);
 447         signal(SIGHUP,sighandler);
 448         signal(SIGTERM,sighandler);
 449         signal(SIGPIPE,sighandler);
 450         created_signal = 1;
 451
 452         /* init message */
 453         init_message();
 454
 455         /*** main loop ***/
 456         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 457         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 458         printf("%s\n", tracetext);
 459         end_trace();
 460         quit = 0;
 461 #if 0
 462         GET_NOW();
 463 #endif
 464         while(!quit) {
 465 #if 0
 466                 last_d = now_d;
 467                 GET_NOW();
 468                 if (now_d-last_d > 1.0) {
 469                         PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
 470                 }
 471                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 472                 all_idle = 1;
 473
 474                 /* must be processed after all queues, so they are empty */
 475                 if (select_main(1, NULL, NULL, NULL))
 476                         all_idle = 0;
 477                 if (all_idle) {
 478                         usleep(10000);
 479                 }
 480 #else
 481                 if (options.polling) {
 482                         if (!select_main(1, NULL, NULL, NULL)) {
 483                                 usleep(10000);
 484                         }
 485                 } else
 486                         select_main(0, NULL, NULL, NULL);
 487 #endif
 488         }
 489         SPRINT(tracetext, "%s terminated", NAME);
 490         printf("%s\n", tracetext);
 491         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 492         if (quit > 0)
 493                 add_trace((char *)"signal", NULL, "%d", quit);
 494         if (quit < 0)
 495                 add_trace((char *)"errno", NULL, "%d", quit);
 496         end_trace();
 497         ret=0;
 498
 499         /* clean messacleane */
 500         cleanup_message();
 501
 502         /* free all */
 503 free:
 504
 505         /* set scheduler & priority
 506          */
 507         if (options.schedule > 1) {
 508                 memset(&schedp, 0, sizeof(schedp));
 509                 schedp.sched_priority = options.schedule;
 510                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 511         }
 512         /* reset signals */
 513         if (created_signal) {
 514                 signal(SIGINT,SIG_DFL);
 515                 signal(SIGHUP,SIG_DFL);
 516                 signal(SIGTERM,SIG_DFL);
 517                 signal(SIGPIPE,SIG_DFL);
 518         }
 519
 520         /* destroy objects */
 521
 522         while(port_first) {
 523                 debug_count++;
 524                 delete port_first;
 525         }
 526         while(epoint_first) {
 527                 debug_count++;
 528                 delete epoint_first;
 529         }
 530         epoint_first = NULL;
 531         debug_count++;
 532         join_free();
 533
 534         /* free interfaces */
 535         if (interface_first)
 536                 free_interfaces(interface_first);
 537         interface_first = NULL;
 538
 539         /* close isdn ports */
 540         mISDNport_close_all();
 541
 542         /* flush messages */
 543         debug_count++;
 544         i = 0;
 545         while ((message = message_get())) {
 546                 i++;
 547                 message_free(message);
 548         }
 549         if (i) {
 550                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 551         }
 552
 553         /* free tones */
 554         if (toneset_first)
 555                 free_tones();
 556
 557         /* free admin socket */
 558         admin_cleanup();
 559
 560         /* close lock */
 561         if (created_lock)
 562                 flock(lockfd, LOCK_UN);
 563         if (lockfd >= 0) {
 564                 chmod(lock, 0700);
 565                 unlink(lock);
 566                 close(lockfd);
 567         }
 568
 569         /* free rulesets */
 570         if (ruleset_first)
 571                 ruleset_free(ruleset_first);
 572         ruleset_first = NULL;
 573
 574         /* free mutex */
 575         if (created_mutexe)
 576                 if (pthread_mutex_destroy(&mutexe))
 577                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 578 //      if (created_mutext)
 579 //              if (pthread_mutex_destroy(&mutext))
 580 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 581         if (created_mutexd)
 582                 if (pthread_mutex_destroy(&mutexd))
 583                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 584
 585         /* deinitialize mISDN */
 586         if (created_misdn)
 587                 mISDN_deinitialize();
 588
 589         /* free gsm */
 590 #if 0
 591 exit is done when interface is down
 592 #ifdef WITH_GSM_BS
 593         gsm_bs_exit(0);
 594 #endif
 595 #endif
 596 #ifdef WITH_GSM_MS
 597         gsm_ms_exit(0);
 598 #endif
 599 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 600         gsm_exit(0);
 601 #endif
 602
 603         /* close loopback, if used by GSM or remote */
 604         if (mISDNloop.sock > -1)
 605                 mISDNloop_close();
 606
 607         /* display memory leak */
 608 #define MEMCHECK(a, b) \
 609         if (b) { \
 610                 SPRINT(tracetext, a, NAME); \
 611                 start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 612                 if (ret) add_trace("blocks", NULL, "%d", b); \
 613                 end_trace(); \
 614                 printf("\n******************************\n\007"); \
 615                 printf("\nERROR: %d %s\n", b, a); \
 616                 printf("\n******************************\n"); \
 617                 ret = -1; \
 618         }
 619         MEMCHECK("",memuse)
 620         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 621         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 622         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 623         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 624         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 625         MEMCHECK("memory block(s) left (args)",amemuse)
 626         MEMCHECK("class(es) left",classuse)
 627         MEMCHECK("file descriptor(s) left",fduse)
 628         MEMCHECK("file handler(s) left",fhuse)
 629
 630         /* unlock LCR process */
 631 //      pthread_mutex_unlock(&mutex_lcr);
 632
 633         /* take me out */
 634         return(ret);
 635 }
 636
 637
 638