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