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                 }
  88         }
  89
  90         debug_newline = 0;
  91         if (buffer[0])
  92                 if (buffer[strlen(buffer)-1] == '\n')
  93                         debug_newline = 1;
  94 }
  95
  96
  97 void _printdebug(const char *function, int line, unsigned int mask, const char *fmt, ...)
  98 {
  99         char buffer[4096];
 100         va_list args;
 101
 102         if (!(options.deb & mask))
 103                 return;
 104         pthread_mutex_lock(&mutexd);
 105
 106         va_start(args,fmt);
 107         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 108         buffer[sizeof(buffer)-1]=0;
 109         va_end(args);
 110
 111         debug(function, line, "DEBUG", buffer);
 112
 113         pthread_mutex_unlock(&mutexd);
 114 }
 115
 116 void _printerror(const char *function, int line, const char *fmt, ...)
 117 {
 118         char buffer[4096];
 119         va_list args;
 120
 121         pthread_mutex_lock(&mutexe);
 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         if (options.deb)
 129                 debug(function, line, "ERROR", buffer);
 130         else { /* only if we do not debug */
 131                 if (function)
 132                         fprintf(stderr, "ERROR (in %s() line %d) %s", function, line, buffer);
 133                 else
 134                         fprintf(stderr, "ERROR %s", buffer);
 135         }
 136
 137         pthread_mutex_unlock(&mutexe);
 138 }
 139
 140
 141 void sighandler(int sigset)
 142 {
 143         struct sched_param schedp;
 144
 145         if (sigset == SIGHUP)
 146                 return;
 147         if (sigset == SIGPIPE)
 148                 return;
 149         fprintf(stderr, "LCR: Signal received: %d\n", sigset);
 150         PDEBUG(DEBUG_LOG, "Signal received: %d\n", sigset);
 151         if (!quit) {
 152                 quit = sigset;
 153                 /* set scheduler & priority */
 154                 if (options.schedule > 1) {
 155                         memset(&schedp, 0, sizeof(schedp));
 156                         schedp.sched_priority = 0;
 157                         sched_setscheduler(0, SCHED_OTHER, &schedp);
 158                 }
 159         }
 160 }
 161
 162
 163 /*
 164  * the main
 165  */
 166 int main(int argc, char *argv[])
 167 {
 168 #if 0
 169         double                  now_d, last_d;
 170         int                     all_idle;
 171 #endif
 172         int                     ret = -1;
 173         int                     lockfd = -1; /* file lock */
 174         struct lcr_msg          *message;
 175         int                     i;
 176         struct sched_param      schedp;
 177         int                     created_mutexd = 0,/* created_mutext = 0,*/ created_mutexe = 0,
 178                                 created_lock = 0, created_signal = 0, created_debug = 0,
 179                                 created_misdn = 0;
 180         char                    tracetext[256], lock[128];
 181         char                    options_error[256];
 182
 183 #if 0
 184         /* init fdset */
 185         memset(lcr_fdset, 0, sizeof(lcr_fdset));
 186 #endif
 187
 188         /* lock LCR process */
 189 //      pthread_mutex_lock(&mutex_lcr);
 190
 191         /* show version */
 192         printf("\n** %s  Version %s\n\n", NAME, VERSION_STRING);
 193
 194         /* show options */
 195         if (argc <= 1) {
 196                 usage:
 197                 printf("\n");
 198                 printf("Usage: lcr (query | start | fork | rules | route)\n");
 199                 printf("query     = Show available isdn ports.\n");
 200                 printf("start     = Run lcr normally, abort with CTRL+C.\n");
 201                 printf("fork      = Do daemon fork and run as background process.\n");
 202                 printf("interface = Get help of available interface syntax.\n");
 203                 printf("rules     = Get help of available routing rule syntax.\n");
 204                 printf("rules [action] = Get individual help for given action.\n");
 205 //              printf("route = Show current routing as it is parsed.\n");
 206                 printf("\n");
 207                 ret = 999;
 208                 goto free;
 209         }
 210
 211         /* init crc */
 212         crc_init();
 213
 214         /* the mutex init */
 215         if (pthread_mutex_init(&mutexd, NULL)) {
 216                 fprintf(stderr, "cannot create 'PDEBUG' mutex\n");
 217                 goto free;
 218         }
 219         created_mutexd = 1;
 220 //      if (pthread_mutex_init(&mutext, NULL)) {
 221 //              fprintf(stderr, "cannot create 'trace' mutex\n");
 222 //              goto free;
 223 //      }
 224 //      created_mutext = 1;
 225         if (pthread_mutex_init(&mutexe, NULL)) {
 226                 fprintf(stderr, "cannot create 'PERROR' mutex\n");
 227                 goto free;
 228         }
 229         created_mutexe = 1;
 230
 231         /* show interface */
 232         if (!(strcasecmp(argv[1],"interface"))) {
 233                 doc_interface();
 234                 ret = 0;
 235                 goto free;
 236         }
 237
 238         /* show rules */
 239         if (!(strcasecmp(argv[1],"rules"))) {
 240                 if (argc <= 2)
 241                         doc_rules(NULL);
 242                 else
 243                         doc_rules(argv[2]);
 244                 ret = 0;
 245                 goto free;
 246         }
 247
 248         /* query available isdn ports */
 249         if (!(strcasecmp(argv[1],"query"))) {
 250                 int rc;
 251                 fprintf(stderr, "-> Using 'misdn_info'\n");
 252                 rc = system("misdn_info");
 253                 ret = 0;
 254                 goto free;
 255         }
 256
 257         /* read options */
 258         if (read_options(options_error) == 0) {
 259                 PERROR("%s", options_error);
 260                 goto free;
 261         }
 262
 263         /* init mISDN */
 264         if (mISDN_initialize() < 0)
 265                 goto free;
 266         created_misdn = 1;
 267         created_debug = 1;
 268
 269         /* read ruleset(s) */
 270         if (!(ruleset_first = ruleset_parse()))
 271                 goto free;
 272
 273         /* set pointer to main ruleset */
 274         ruleset_main = getrulesetbyname("main");
 275         if (!ruleset_main) {
 276                 fprintf(stderr, "\n***\n -> Missing 'main' ruleset, causing ALL calls to be disconnected.\n***\n\n");
 277                 PDEBUG(DEBUG_LOG, "Missing 'main' ruleset, causing ALL calls to be disconnected.\n");
 278                 sleep(2);
 279         }
 280
 281 #if 0
 282         /* query available isdn ports */
 283         if (!(strcasecmp(argv[1],"route"))) {
 284                 ruleset_debug(ruleset_first);
 285                 ret = 0;
 286                 goto free;
 287         }
 288 #endif
 289
 290         /* do fork in special cases */
 291         if (!(strcasecmp(argv[1],"fork"))) {
 292                 pid_t pid;
 293                 FILE *pidfile;
 294
 295                 /* do daemon fork */
 296                 pid = fork();
 297
 298                 if (pid < 0) {
 299                         fprintf(stderr, "Cannot fork!\n");
 300                         goto free;
 301                 }
 302                 if (pid != 0) {
 303                         exit(0);
 304                 }
 305                 usleep(200000);
 306                 printf("\n");
 307
 308                 /* do second fork */
 309                 pid = fork();
 310
 311                 if (pid < 0) {
 312                         fprintf(stderr, "Cannot fork!\n");
 313                         goto free;
 314                 }
 315                 if (pid != 0) {
 316                         printf("LCR: Starting daemon.\n");
 317                         exit(0);
 318                 }
 319                 nooutput = 1;
 320
 321                 /* write pid file */
 322                 pidfile = fopen("/var/run/lcr.pid","w");
 323                 if (pidfile) {
 324                         fprintf(pidfile, "%d\n", getpid());
 325                         fclose(pidfile);
 326                 }
 327         } else
 328         /* if not start */
 329         if (!!strcasecmp(argv[1],"start")) {
 330                 goto usage;
 331         }
 332
 333         /* create lock and lock! */
 334         SPRINT(lock, "%s/lcr.lock", options.lock);
 335         if ((lockfd = open(lock, O_CREAT | O_WRONLY, S_IWUSR)) < 0) {
 336                 fprintf(stderr, "Cannot create lock file: %s\n", lock);
 337                 fprintf(stderr, "Check options.conf to change to path with permissions for you.\n");
 338                 goto free;
 339         }
 340         if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 341                 if (errno == EWOULDBLOCK)
 342                         fprintf(stderr, "LCR: Another LCR process is running. Please kill the other one.\n");
 343                 else    fprintf(stderr, "Locking process failed: errno=%d\n", errno);
 344                 goto free;
 345         }
 346         created_lock = 1;
 347
 348         /* initialize admin socket */
 349         if (admin_init()) {
 350                 fprintf(stderr, "Unable to initialize admin socket.\n");
 351                 goto free;
 352         }
 353
 354         /* generate alaw / ulaw tables */
 355         generate_tables(options.law);
 356
 357 #ifdef WITH_SS5
 358         /* init ss5 sine tables */
 359         ss5_sine_generate();
 360         ss5_test_decode();
 361 #endif
 362
 363         /* load tones (if requested) */
 364         if (fetch_tones() == 0) {
 365                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 366                 goto free;
 367         }
 368
 369 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 370         /* init gsm */
 371         if (gsm_init()) {
 372                 fprintf(stderr, "GSM initialization failed.\n");
 373                 goto free;
 374         }
 375 #endif
 376 #if 0
 377 init is done when interface is up
 378 #ifdef WITH_GSM_BS
 379         if (gsm_bs_init()) {
 380                 fprintf(stderr, "GSM BS initialization failed.\n");
 381                 goto free;
 382         }
 383 #endif
 384 #endif
 385 #ifdef WITH_GSM_MS
 386         if (gsm_ms_init()) {
 387                 fprintf(stderr, "GSM MS initialization failed.\n");
 388                 goto free;
 389         }
 390 #endif
 391
 392         /* read interfaces and open ports */
 393         if (!read_interfaces()) {
 394                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 395                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 396                 goto free;
 397         }
 398         relink_interfaces();
 399         interface_first = interface_newlist;
 400         interface_newlist = NULL;
 401
 402         /* locking memory paging */
 403         i = 0;
 404         while(i < 10) {
 405                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 406                         break;
 407                 usleep(200000);
 408                 i++;
 409         }
 410         if (i == 10) {
 411                 switch(errno) {
 412                         case ENOMEM:
 413                         fprintf(stderr, "Warning: Not enough memory to lock paging.\n");
 414                         break;
 415                         case EPERM:
 416                         fprintf(stderr, "Warning: No permission to lock paging.\n");
 417                         break;
 418                         case EFAULT:
 419                         fprintf(stderr, "Warning: 'Bad address' while locking paging.\n");
 420                         break;
 421                         default:
 422                         fprintf(stderr, "Warning: Unknown error %d while locking paging.\n", errno);
 423                 }
 424         }
 425
 426         /* set real time scheduler & priority */
 427         if (options.schedule > 1) {
 428                 memset(&schedp, 0, sizeof(schedp));
 429                 schedp.sched_priority = options.schedule;
 430                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 431                 if (ret < 0) {
 432                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 433                         goto free;
 434                 }
 435         }
 436
 437         /* signal handlers */
 438         signal(SIGINT,sighandler);
 439         signal(SIGHUP,sighandler);
 440         signal(SIGTERM,sighandler);
 441         signal(SIGPIPE,sighandler);
 442         created_signal = 1;
 443
 444         /* init message */
 445         init_message();
 446
 447         /*** main loop ***/
 448         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 449         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 450         printf("%s\n", tracetext);
 451         end_trace();
 452         quit = 0;
 453 #if 0
 454         GET_NOW();
 455 #endif
 456         while(!quit) {
 457 #if 0
 458                 last_d = now_d;
 459                 GET_NOW();
 460                 if (now_d-last_d > 1.0) {
 461                         PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
 462                 }
 463                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 464                 all_idle = 1;
 465
 466                 /* must be processed after all queues, so they are empty */
 467                 if (select_main(1, NULL, NULL, NULL))
 468                         all_idle = 0;
 469                 if (all_idle) {
 470                         usleep(10000);
 471                 }
 472 #else
 473                 if (options.polling) {
 474                         if (!select_main(1, NULL, NULL, NULL))
 475                                 usleep(10000);
 476                 } else
 477                         select_main(0, NULL, NULL, NULL);
 478 #endif
 479         }
 480         SPRINT(tracetext, "%s terminated", NAME);
 481         printf("%s\n", tracetext);
 482         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 483         if (quit > 0)
 484                 add_trace((char *)"signal", NULL, "%d", quit);
 485         if (quit < 0)
 486                 add_trace((char *)"errno", NULL, "%d", quit);
 487         end_trace();
 488         ret=0;
 489
 490         /* clean messacleane */
 491         cleanup_message();
 492
 493         /* free all */
 494 free:
 495
 496         /* set scheduler & priority
 497          */
 498         if (options.schedule > 1) {
 499                 memset(&schedp, 0, sizeof(schedp));
 500                 schedp.sched_priority = options.schedule;
 501                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 502         }
 503         /* reset signals */
 504         if (created_signal) {
 505                 signal(SIGINT,SIG_DFL);
 506                 signal(SIGHUP,SIG_DFL);
 507                 signal(SIGTERM,SIG_DFL);
 508                 signal(SIGPIPE,SIG_DFL);
 509         }
 510
 511         /* destroy objects */
 512
 513         while(port_first) {
 514                 debug_count++;
 515                 delete port_first;
 516         }
 517         while(epoint_first) {
 518                 debug_count++;
 519                 delete epoint_first;
 520         }
 521         epoint_first = NULL;
 522         debug_count++;
 523         join_free();
 524
 525         /* free interfaces */
 526         if (interface_first)
 527                 free_interfaces(interface_first);
 528         interface_first = NULL;
 529
 530         /* close isdn ports */
 531         mISDNport_close_all();
 532
 533         /* flush messages */
 534         debug_count++;
 535         i = 0;
 536         while ((message = message_get())) {
 537                 i++;
 538                 message_free(message);
 539         }
 540         if (i) {
 541                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 542         }
 543
 544         /* free tones */
 545         if (toneset_first)
 546                 free_tones();
 547
 548         /* free admin socket */
 549         admin_cleanup();
 550
 551         /* close lock */
 552         if (created_lock)
 553                 flock(lockfd, LOCK_UN);
 554         if (lockfd >= 0) {
 555                 chmod(lock, 0700);
 556                 unlink(lock);
 557                 close(lockfd);
 558         }
 559
 560         /* free rulesets */
 561         if (ruleset_first)
 562                 ruleset_free(ruleset_first);
 563         ruleset_first = NULL;
 564
 565         /* free mutex */
 566         if (created_mutexe)
 567                 if (pthread_mutex_destroy(&mutexe))
 568                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 569 //      if (created_mutext)
 570 //              if (pthread_mutex_destroy(&mutext))
 571 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 572         if (created_mutexd)
 573                 if (pthread_mutex_destroy(&mutexd))
 574                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 575
 576         /* deinitialize mISDN */
 577         if (created_misdn)
 578                 mISDN_deinitialize();
 579
 580         /* free gsm */
 581 #if 0
 582 exit is done when interface is down
 583 #ifdef WITH_GSM_BS
 584         gsm_bs_exit(0);
 585 #endif
 586 #endif
 587 #ifdef WITH_GSM_MS
 588         gsm_ms_exit(0);
 589 #endif
 590 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 591         gsm_exit(0);
 592 #endif
 593
 594         /* close loopback, if used by GSM or remote */
 595         if (mISDNloop.sock > -1)
 596                 mISDNloop_close();
 597
 598         /* display memory leak */
 599 #define MEMCHECK(a, b) \
 600         if (b) { \
 601                 SPRINT(tracetext, a, NAME); \
 602                 start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 603                 if (ret) add_trace("blocks", NULL, "%d", b); \
 604                 end_trace(); \
 605                 printf("\n******************************\n\007"); \
 606                 printf("\nERROR: %d %s\n", b, a); \
 607                 printf("\n******************************\n"); \
 608                 ret = -1; \
 609         }
 610         MEMCHECK("",memuse)
 611         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 612         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 613         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 614         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 615         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 616         MEMCHECK("memory block(s) left (args)",amemuse)
 617         MEMCHECK("class(es) left",classuse)
 618         MEMCHECK("file descriptor(s) left",fduse)
 619         MEMCHECK("file handler(s) left",fhuse)
 620
 621         /* unlock LCR process */
 622 //      pthread_mutex_unlock(&mutex_lcr);
 623
 624         /* take me out */
 625         return(ret);
 626 }
 627
 628
 629