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
  14 //MESSAGES
  15
  16 struct timeval now_tv;
  17 struct timezone now_tz;
  18 #define GET_NOW() \
  19         { \
  20                 gettimeofday(&now_tv, &now_tz); \
  21                 now_d = ((double)(now_tv.tv_usec))/1000000 + now_tv.tv_sec; \
  22         }
  23
  24 FILE *debug_fp = NULL;
  25 int quit=0;
  26
  27 #if 0
  28 struct lcr_fdset lcr_fdset[FD_SETSIZE];
  29 #endif
  30
  31 pthread_mutex_t mutexd; // debug output mutex
  32 pthread_mutex_t mutext; // trace output mutex
  33 pthread_mutex_t mutexe; // error output mutex
  34 //pthread_mutex_t mutex_lcr; // lcr process mutex
  35
  36 int memuse = 0;
  37 int mmemuse = 0;
  38 int cmemuse = 0;
  39 int ememuse = 0;
  40 int pmemuse = 0;
  41 int amemuse = 0;
  42 int rmemuse = 0;
  43 int classuse = 0;
  44 int fduse = 0;
  45 int fhuse = 0;
  46
  47 int debug_count = 0;
  48 int last_debug = 0;
  49 int debug_newline = 1;
  50 int nooutput = 0;
  51
  52 void debug(const char *function, int line, const char *prefix, char *buffer)
  53 {
  54         time_t now;
  55         struct tm *now_tm;
  56
  57         /* if we have a new debug count, we add a mark */
  58         if (last_debug != debug_count) {
  59                 last_debug = debug_count;
  60                 time(&now);
  61                 now_tm = localtime(&now);
  62                 if (!nooutput)
  63                         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);
  64                 if (debug_fp)
  65                         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);
  66         }
  67
  68         if (!nooutput) {
  69                 if (debug_newline)
  70                         printf("\033[32m%06d %s\033[37m%s", debug_count%1000000, prefix?prefix:"", prefix?" ":"");
  71                 if (function)
  72                         printf("(in %s() line %d): %s", function, line, buffer);
  73                 else
  74                         printf("%s", buffer);
  75         }
  76
  77         if (debug_fp) {
  78                 if (debug_newline) {
  79                         if (function)
  80                                 fprintf(debug_fp, "%s%s(in %s() line %d): %s", prefix?prefix:"", prefix?" ":"", function, line, buffer);
  81                         else
  82                                 fprintf(debug_fp, "%s%s: %s", prefix?prefix:"", prefix?" ":"", buffer);
  83                 }
  84         }
  85
  86         debug_newline = 0;
  87         if (buffer[0])
  88                 if (buffer[strlen(buffer)-1] == '\n')
  89                         debug_newline = 1;
  90 }
  91
  92
  93 void _printdebug(const char *function, int line, unsigned int mask, const char *fmt, ...)
  94 {
  95         char buffer[4096];
  96         va_list args;
  97
  98         if (!(options.deb & mask))
  99                 return;
 100         pthread_mutex_lock(&mutexd);
 101
 102         va_start(args,fmt);
 103         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 104         buffer[sizeof(buffer)-1]=0;
 105         va_end(args);
 106
 107         debug(function, line, "DEBUG", buffer);
 108
 109         pthread_mutex_unlock(&mutexd);
 110 }
 111
 112 void _printerror(const char *function, int line, const char *fmt, ...)
 113 {
 114         char buffer[4096];
 115         va_list args;
 116
 117         pthread_mutex_lock(&mutexe);
 118
 119         va_start(args,fmt);
 120         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 121         buffer[sizeof(buffer)-1]=0;
 122         va_end(args);
 123
 124         if (options.deb)
 125                 debug(function, line, "ERROR", buffer);
 126         else { /* only if we do not debug */
 127                 if (function)
 128                         fprintf(stderr, "ERROR (in %s() line %d) %s", function, line, buffer);
 129                 else
 130                         fprintf(stderr, "ERROR %s", buffer);
 131         }
 132
 133         pthread_mutex_unlock(&mutexe);
 134 }
 135
 136
 137 void sighandler(int sigset)
 138 {
 139         struct sched_param schedp;
 140
 141         if (sigset == SIGHUP)
 142                 return;
 143         if (sigset == SIGPIPE)
 144                 return;
 145         if (!quit) {
 146                 quit = sigset;
 147                 /* set scheduler & priority */
 148                 if (options.schedule > 1) {
 149                         memset(&schedp, 0, sizeof(schedp));
 150                         schedp.sched_priority = 0;
 151                         sched_setscheduler(0, SCHED_OTHER, &schedp);
 152                 }
 153                 fprintf(stderr, "LCR: Signal received: %d\n", sigset);
 154                 PDEBUG(DEBUG_LOG, "Signal received: %d\n", sigset);
 155         }
 156 }
 157
 158
 159 /*
 160  * the main
 161  */
 162 int main(int argc, char *argv[])
 163 {
 164 #ifdef WITH_GSM
 165         double                  now_d, last_d;
 166         int                     all_idle;
 167 #endif
 168         int                     ret = -1;
 169         int                     lockfd = -1; /* file lock */
 170         struct lcr_msg          *message;
 171         int                     i;
 172         struct sched_param      schedp;
 173         int                     created_mutexd = 0,/* created_mutext = 0,*/ created_mutexe = 0,
 174                                 created_lock = 0, created_signal = 0, created_debug = 0,
 175                                 created_misdn = 0;
 176         char                    tracetext[256], lock[128];
 177         char                    options_error[256];
 178
 179 #if 0
 180         /* init fdset */
 181         memset(lcr_fdset, 0, sizeof(lcr_fdset));
 182 #endif
 183
 184         /* lock LCR process */
 185 //      pthread_mutex_lock(&mutex_lcr);
 186
 187         /* show version */
 188         printf("\n** %s  Version %s\n\n", NAME, VERSION_STRING);
 189
 190         /* show options */
 191         if (argc <= 1) {
 192                 usage:
 193                 printf("\n");
 194                 printf("Usage: lcr (query | start | fork | rules | route)\n");
 195                 printf("query     = Show available isdn ports.\n");
 196                 printf("start     = Run lcr normally, abort with CTRL+C.\n");
 197                 printf("fork      = Do daemon fork and run as background process.\n");
 198                 printf("interface = Get help of available interface syntax.\n");
 199                 printf("rules     = Get help of available routing rule syntax.\n");
 200                 printf("rules [action] = Get individual help for given action.\n");
 201 //              printf("route = Show current routing as it is parsed.\n");
 202                 printf("\n");
 203                 ret = 999;
 204                 goto free;
 205         }
 206
 207         /* init crc */
 208         crc_init();
 209
 210         /* the mutex init */
 211         if (pthread_mutex_init(&mutexd, NULL)) {
 212                 fprintf(stderr, "cannot create 'PDEBUG' mutex\n");
 213                 goto free;
 214         }
 215         created_mutexd = 1;
 216 //      if (pthread_mutex_init(&mutext, NULL)) {
 217 //              fprintf(stderr, "cannot create 'trace' mutex\n");
 218 //              goto free;
 219 //      }
 220 //      created_mutext = 1;
 221         if (pthread_mutex_init(&mutexe, NULL)) {
 222                 fprintf(stderr, "cannot create 'PERROR' mutex\n");
 223                 goto free;
 224         }
 225         created_mutexe = 1;
 226
 227         /* show interface */
 228         if (!(strcasecmp(argv[1],"interface"))) {
 229                 doc_interface();
 230                 ret = 0;
 231                 goto free;
 232         }
 233
 234         /* show rules */
 235         if (!(strcasecmp(argv[1],"rules"))) {
 236                 if (argc <= 2)
 237                         doc_rules(NULL);
 238                 else
 239                         doc_rules(argv[2]);
 240                 ret = 0;
 241                 goto free;
 242         }
 243
 244         /* query available isdn ports */
 245         if (!(strcasecmp(argv[1],"query"))) {
 246                 int rc;
 247                 fprintf(stderr, "-> Using 'misdn_info'\n");
 248                 rc = system("misdn_info");
 249                 ret = 0;
 250                 goto free;
 251         }
 252
 253         /* read options */
 254         if (read_options(options_error) == 0) {
 255                 PERROR("%s", options_error);
 256                 goto free;
 257         }
 258
 259         /* init mISDN */
 260         if (mISDN_initialize() < 0)
 261                 goto free;
 262         created_misdn = 1;
 263         created_debug = 1;
 264
 265         /* read ruleset(s) */
 266         if (!(ruleset_first = ruleset_parse()))
 267                 goto free;
 268
 269         /* set pointer to main ruleset */
 270         ruleset_main = getrulesetbyname("main");
 271         if (!ruleset_main) {
 272                 fprintf(stderr, "\n***\n -> Missing 'main' ruleset, causing ALL calls to be disconnected.\n***\n\n");
 273                 PDEBUG(DEBUG_LOG, "Missing 'main' ruleset, causing ALL calls to be disconnected.\n");
 274                 sleep(2);
 275         }
 276
 277 #if 0
 278         /* query available isdn ports */
 279         if (!(strcasecmp(argv[1],"route"))) {
 280                 ruleset_debug(ruleset_first);
 281                 ret = 0;
 282                 goto free;
 283         }
 284 #endif
 285
 286         /* do fork in special cases */
 287         if (!(strcasecmp(argv[1],"fork"))) {
 288                 pid_t pid;
 289                 FILE *pidfile;
 290
 291                 /* do daemon fork */
 292                 pid = fork();
 293
 294                 if (pid < 0) {
 295                         fprintf(stderr, "Cannot fork!\n");
 296                         goto free;
 297                 }
 298                 if (pid != 0) {
 299                         exit(0);
 300                 }
 301                 usleep(200000);
 302                 printf("\n");
 303
 304                 /* do second fork */
 305                 pid = fork();
 306
 307                 if (pid < 0) {
 308                         fprintf(stderr, "Cannot fork!\n");
 309                         goto free;
 310                 }
 311                 if (pid != 0) {
 312                         printf("LCR: Starting daemon.\n");
 313                         exit(0);
 314                 }
 315                 nooutput = 1;
 316
 317                 /* write pid file */
 318                 pidfile = fopen("/var/run/lcr.pid","w");
 319                 if (pidfile) {
 320                         fprintf(pidfile, "%d\n", getpid());
 321                         fclose(pidfile);
 322                 }
 323         } else
 324         /* if not start */
 325         if (!!strcasecmp(argv[1],"start")) {
 326                 goto usage;
 327         }
 328
 329         /* create lock and lock! */
 330         SPRINT(lock, "%s/lcr.lock", options.lock);
 331         if ((lockfd = open(lock, O_CREAT | O_WRONLY, S_IWUSR)) < 0) {
 332                 fprintf(stderr, "Cannot create lock file: %s\n", lock);
 333                 fprintf(stderr, "Check options.conf to change to path with permissions for you.\n");
 334                 goto free;
 335         }
 336         if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 337                 if (errno == EWOULDBLOCK)
 338                         fprintf(stderr, "LCR: Another LCR process is running. Please kill the other one.\n");
 339                 else    fprintf(stderr, "Locking process failed: errno=%d\n", errno);
 340                 goto free;
 341         }
 342         created_lock = 1;
 343
 344         /* initialize admin socket */
 345         if (admin_init()) {
 346                 fprintf(stderr, "Unable to initialize admin socket.\n");
 347                 goto free;
 348         }
 349
 350         /* generate alaw / ulaw tables */
 351         generate_tables(options.law);
 352
 353 #ifdef WITH_SS5
 354         /* init ss5 sine tables */
 355         ss5_sine_generate();
 356         ss5_test_decode();
 357 #endif
 358
 359         /* load tones (if requested) */
 360         if (fetch_tones() == 0) {
 361                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 362                 goto free;
 363         }
 364
 365 #ifdef WITH_GSM
 366         /* handle gsm */
 367         if (options.gsm && gsm_init()) {
 368                 fprintf(stderr, "GSM initialization failed.\n");
 369                 goto free;
 370         }
 371 #else
 372         if (options.gsm) {
 373                 fprintf(stderr, "GSM is enabled, but not compiled. Use --with-gsm while configure!\n");
 374                 goto free;
 375         }
 376 #endif
 377
 378         /* read interfaces and open ports */
 379         if (!read_interfaces()) {
 380                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 381                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 382                 goto free;
 383         }
 384         relink_interfaces();
 385         interface_first = interface_newlist;
 386         interface_newlist = NULL;
 387
 388         /* locking memory paging */
 389         i = 0;
 390         while(i < 10) {
 391                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 392                         break;
 393                 usleep(200000);
 394                 i++;
 395         }
 396         if (i == 10) {
 397                 switch(errno) {
 398                         case ENOMEM:
 399                         fprintf(stderr, "Warning: Not enough memory to lock paging.\n");
 400                         break;
 401                         case EPERM:
 402                         fprintf(stderr, "Warning: No permission to lock paging.\n");
 403                         break;
 404                         case EFAULT:
 405                         fprintf(stderr, "Warning: 'Bad address' while locking paging.\n");
 406                         break;
 407                         default:
 408                         fprintf(stderr, "Warning: Unknown error %d while locking paging.\n", errno);
 409                 }
 410         }
 411
 412         /* set real time scheduler & priority */
 413         if (options.schedule > 1) {
 414                 memset(&schedp, 0, sizeof(schedp));
 415                 schedp.sched_priority = options.schedule;
 416                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 417                 if (ret < 0) {
 418                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 419                         goto free;
 420                 }
 421         }
 422
 423         /* signal handlers */
 424         signal(SIGINT,sighandler);
 425         signal(SIGHUP,sighandler);
 426         signal(SIGTERM,sighandler);
 427         signal(SIGPIPE,sighandler);
 428         created_signal = 1;
 429
 430         /* init message */
 431         init_message();
 432
 433         /*** main loop ***/
 434         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 435         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 436         printf("%s\n", tracetext);
 437         end_trace();
 438         quit = 0;
 439 #ifdef WITH_GSM
 440         GET_NOW();
 441 #endif
 442         while(!quit) {
 443 #ifdef WITH_GSM
 444                 last_d = now_d;
 445                 GET_NOW();
 446                 if (now_d-last_d > 1.0) {
 447                         PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
 448                 }
 449                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 450                 all_idle = 1;
 451
 452                 /* must be processed after all queues, so they are empty */
 453                 if (select_main(1, NULL, NULL, NULL))
 454                         all_idle = 0;
 455                 /* handle gsm */
 456                 if (options.gsm)
 457                         while(handle_gsm())
 458                                 all_idle = 0;
 459                 if (all_idle) {
 460                         usleep(10000);
 461                 }
 462 #else
 463                 if (options.polling)
 464                         if (!select_main(1, NULL, NULL, NULL))
 465                                 usleep(10000);
 466                 else
 467                         select_main(0, NULL, NULL, NULL);
 468 #endif
 469         }
 470         SPRINT(tracetext, "%s terminated", NAME);
 471         printf("%s\n", tracetext);
 472         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 473         if (quit)
 474                 add_trace((char *)"signal", NULL, "%d", quit);
 475         end_trace();
 476         ret=0;
 477
 478         /* clean messacleane */
 479         cleanup_message();
 480
 481         /* free all */
 482 free:
 483
 484         /* set scheduler & priority
 485          */
 486         if (options.schedule > 1) {
 487                 memset(&schedp, 0, sizeof(schedp));
 488                 schedp.sched_priority = options.schedule;
 489                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 490         }
 491         /* reset signals */
 492         if (created_signal) {
 493                 signal(SIGINT,SIG_DFL);
 494                 signal(SIGHUP,SIG_DFL);
 495                 signal(SIGTERM,SIG_DFL);
 496                 signal(SIGPIPE,SIG_DFL);
 497         }
 498
 499         /* destroy objects */
 500
 501         while(port_first) {
 502                 debug_count++;
 503                 delete port_first;
 504         }
 505         while(epoint_first) {
 506                 debug_count++;
 507                 delete epoint_first;
 508         }
 509         epoint_first = NULL;
 510         debug_count++;
 511         join_free();
 512
 513         /* free interfaces */
 514         if (interface_first)
 515                 free_interfaces(interface_first);
 516         interface_first = NULL;
 517
 518         /* close isdn ports */
 519         mISDNport_close_all();
 520
 521         /* flush messages */
 522         debug_count++;
 523         i = 0;
 524         while ((message = message_get())) {
 525                 i++;
 526                 message_free(message);
 527         }
 528         if (i) {
 529                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 530         }
 531
 532         /* free tones */
 533         if (toneset_first)
 534                 free_tones();
 535
 536         /* free admin socket */
 537         admin_cleanup();
 538
 539         /* close lock */
 540         if (created_lock)
 541                 flock(lockfd, LOCK_UN);
 542         if (lockfd >= 0) {
 543                 chmod(lock, 0700);
 544                 unlink(lock);
 545                 close(lockfd);
 546         }
 547
 548         /* free rulesets */
 549         if (ruleset_first)
 550                 ruleset_free(ruleset_first);
 551         ruleset_first = NULL;
 552
 553         /* free mutex */
 554         if (created_mutexe)
 555                 if (pthread_mutex_destroy(&mutexe))
 556                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 557 //      if (created_mutext)
 558 //              if (pthread_mutex_destroy(&mutext))
 559 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 560         if (created_mutexd)
 561                 if (pthread_mutex_destroy(&mutexd))
 562                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 563
 564         /* deinitialize mISDN */
 565         if (created_misdn)
 566                 mISDN_deinitialize();
 567
 568 #ifdef WITH_GSM
 569         /* free gsm */
 570         if (options.gsm)
 571                 gsm_exit(0);
 572 #endif
 573
 574         /* display memory leak */
 575 #define MEMCHECK(a, b) \
 576         if (b) { \
 577                 SPRINT(tracetext, a, NAME); \
 578                 start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 579                 if (ret) add_trace("blocks", NULL, "%d", b); \
 580                 end_trace(); \
 581                 printf("\n******************************\n\007"); \
 582                 printf("\nERROR: %d %s\n", b, a); \
 583                 printf("\n******************************\n"); \
 584                 ret = -1; \
 585         }
 586         MEMCHECK("",memuse)
 587         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 588         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 589         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 590         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 591         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 592         MEMCHECK("memory block(s) left (args)",amemuse)
 593         MEMCHECK("class(es) left",classuse)
 594         MEMCHECK("file descriptor(s) left",fduse)
 595         MEMCHECK("file handler(s) left",fhuse)
 596
 597         /* unlock LCR process */
 598 //      pthread_mutex_unlock(&mutex_lcr);
 599
 600         /* take me out */
 601         return(ret);
 602 }
 603
 604
 605