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 #include "config.h"
  14
  15 //MESSAGES
  16
  17 struct timeval now_tv;
  18 struct timezone now_tz;
  19 #define GET_NOW() \
  20         { \
  21                 gettimeofday(&now_tv, &now_tz); \
  22                 now_d = ((double)(now_tv.tv_usec))/1000000 + now_tv.tv_sec; \
  23         }
  24
  25 FILE *debug_fp = NULL;
  26 int quit = 0;
  27
  28 #if 0
  29 struct lcr_fdset lcr_fdset[FD_SETSIZE];
  30 #endif
  31
  32 pthread_mutex_t mutexd; // debug output mutex
  33 pthread_mutex_t mutext; // trace output mutex
  34 pthread_mutex_t mutexe; // error output mutex
  35 //pthread_mutex_t mutex_lcr; // lcr process mutex
  36
  37 int memuse = 0;
  38 int mmemuse = 0;
  39 int cmemuse = 0;
  40 int ememuse = 0;
  41 int pmemuse = 0;
  42 int amemuse = 0;
  43 int rmemuse = 0;
  44 int classuse = 0;
  45 int fduse = 0;
  46 int fhuse = 0;
  47
  48 int debug_count = 0;
  49 int last_debug = 0;
  50 int debug_newline = 1;
  51 int nooutput = 0;
  52
  53 void debug(const char *function, int line, const char *prefix, char *buffer)
  54 {
  55         time_t now;
  56         struct tm *now_tm;
  57
  58         /* if we have a new debug count, we add a mark */
  59         if (last_debug != debug_count) {
  60                 last_debug = debug_count;
  61                 time(&now);
  62                 now_tm = localtime(&now);
  63                 if (!nooutput)
  64                         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);
  65                 if (debug_fp)
  66                         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);
  67         }
  68
  69         if (!nooutput) {
  70                 if (debug_newline)
  71                         printf("\033[32m%06d %s\033[37m%s", debug_count%1000000, prefix?prefix:"", prefix?" ":"");
  72                 if (function)
  73                         printf("(in %s() line %d): %s", function, line, buffer);
  74                 else
  75                         printf("%s", buffer);
  76         }
  77
  78         if (debug_fp) {
  79                 if (debug_newline) {
  80                         if (function)
  81                                 fprintf(debug_fp, "%s%s(in %s() line %d): %s", prefix?prefix:"", prefix?" ":"", function, line, buffer);
  82                         else
  83                                 fprintf(debug_fp, "%s%s: %s", prefix?prefix:"", prefix?" ":"", buffer);
  84                 }
  85         }
  86
  87         debug_newline = 0;
  88         if (buffer[0])
  89                 if (buffer[strlen(buffer)-1] == '\n')
  90                         debug_newline = 1;
  91 }
  92
  93
  94 void _printdebug(const char *function, int line, unsigned int mask, const char *fmt, ...)
  95 {
  96         char buffer[4096];
  97         va_list args;
  98
  99         if (!(options.deb & mask))
 100                 return;
 101         pthread_mutex_lock(&mutexd);
 102
 103         va_start(args,fmt);
 104         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 105         buffer[sizeof(buffer)-1]=0;
 106         va_end(args);
 107
 108         debug(function, line, "DEBUG", buffer);
 109
 110         pthread_mutex_unlock(&mutexd);
 111 }
 112
 113 void _printerror(const char *function, int line, const char *fmt, ...)
 114 {
 115         char buffer[4096];
 116         va_list args;
 117
 118         pthread_mutex_lock(&mutexe);
 119
 120         va_start(args,fmt);
 121         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 122         buffer[sizeof(buffer)-1]=0;
 123         va_end(args);
 124
 125         if (options.deb)
 126                 debug(function, line, "ERROR", buffer);
 127         else { /* only if we do not debug */
 128                 if (function)
 129                         fprintf(stderr, "ERROR (in %s() line %d) %s", function, line, buffer);
 130                 else
 131                         fprintf(stderr, "ERROR %s", buffer);
 132         }
 133
 134         pthread_mutex_unlock(&mutexe);
 135 }
 136
 137
 138 void sighandler(int sigset)
 139 {
 140         struct sched_param schedp;
 141
 142         if (sigset == SIGHUP)
 143                 return;
 144         if (sigset == SIGPIPE)
 145                 return;
 146         if (!quit) {
 147                 quit = sigset;
 148                 /* set scheduler & priority */
 149                 if (options.schedule > 1) {
 150                         memset(&schedp, 0, sizeof(schedp));
 151                         schedp.sched_priority = 0;
 152                         sched_setscheduler(0, SCHED_OTHER, &schedp);
 153                 }
 154                 fprintf(stderr, "LCR: Signal received: %d\n", sigset);
 155                 PDEBUG(DEBUG_LOG, "Signal received: %d\n", sigset);
 156         }
 157 }
 158
 159
 160 /*
 161  * the main
 162  */
 163 int main(int argc, char *argv[])
 164 {
 165 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 166         double                  now_d, last_d;
 167         int                     all_idle;
 168 #endif
 169         int                     ret = -1;
 170         int                     lockfd = -1; /* file lock */
 171         struct lcr_msg          *message;
 172         int                     i;
 173         struct sched_param      schedp;
 174         int                     created_mutexd = 0,/* created_mutext = 0,*/ created_mutexe = 0,
 175                                 created_lock = 0, created_signal = 0, created_debug = 0,
 176                                 created_misdn = 0;
 177         char                    tracetext[256], lock[128];
 178         char                    options_error[256];
 179
 180 #if 0
 181         /* init fdset */
 182         memset(lcr_fdset, 0, sizeof(lcr_fdset));
 183 #endif
 184
 185         /* lock LCR process */
 186 //      pthread_mutex_lock(&mutex_lcr);
 187
 188         /* show version */
 189         printf("\n** %s  Version %s\n\n", NAME, VERSION_STRING);
 190
 191         /* show options */
 192         if (argc <= 1) {
 193                 usage:
 194                 printf("\n");
 195                 printf("Usage: lcr (query | start | fork | rules | route)\n");
 196                 printf("query     = Show available isdn ports.\n");
 197                 printf("start     = Run lcr normally, abort with CTRL+C.\n");
 198                 printf("fork      = Do daemon fork and run as background process.\n");
 199                 printf("interface = Get help of available interface syntax.\n");
 200                 printf("rules     = Get help of available routing rule syntax.\n");
 201                 printf("rules [action] = Get individual help for given action.\n");
 202 //              printf("route = Show current routing as it is parsed.\n");
 203                 printf("\n");
 204                 ret = 999;
 205                 goto free;
 206         }
 207
 208         /* init crc */
 209         crc_init();
 210
 211         /* the mutex init */
 212         if (pthread_mutex_init(&mutexd, NULL)) {
 213                 fprintf(stderr, "cannot create 'PDEBUG' mutex\n");
 214                 goto free;
 215         }
 216         created_mutexd = 1;
 217 //      if (pthread_mutex_init(&mutext, NULL)) {
 218 //              fprintf(stderr, "cannot create 'trace' mutex\n");
 219 //              goto free;
 220 //      }
 221 //      created_mutext = 1;
 222         if (pthread_mutex_init(&mutexe, NULL)) {
 223                 fprintf(stderr, "cannot create 'PERROR' mutex\n");
 224                 goto free;
 225         }
 226         created_mutexe = 1;
 227
 228         /* show interface */
 229         if (!(strcasecmp(argv[1],"interface"))) {
 230                 doc_interface();
 231                 ret = 0;
 232                 goto free;
 233         }
 234
 235         /* show rules */
 236         if (!(strcasecmp(argv[1],"rules"))) {
 237                 if (argc <= 2)
 238                         doc_rules(NULL);
 239                 else
 240                         doc_rules(argv[2]);
 241                 ret = 0;
 242                 goto free;
 243         }
 244
 245         /* query available isdn ports */
 246         if (!(strcasecmp(argv[1],"query"))) {
 247                 int rc;
 248                 fprintf(stderr, "-> Using 'misdn_info'\n");
 249                 rc = system("misdn_info");
 250                 ret = 0;
 251                 goto free;
 252         }
 253
 254         /* read options */
 255         if (read_options(options_error) == 0) {
 256                 PERROR("%s", options_error);
 257                 goto free;
 258         }
 259
 260         /* init mISDN */
 261         if (mISDN_initialize() < 0)
 262                 goto free;
 263         created_misdn = 1;
 264         created_debug = 1;
 265
 266         /* read ruleset(s) */
 267         if (!(ruleset_first = ruleset_parse()))
 268                 goto free;
 269
 270         /* set pointer to main ruleset */
 271         ruleset_main = getrulesetbyname("main");
 272         if (!ruleset_main) {
 273                 fprintf(stderr, "\n***\n -> Missing 'main' ruleset, causing ALL calls to be disconnected.\n***\n\n");
 274                 PDEBUG(DEBUG_LOG, "Missing 'main' ruleset, causing ALL calls to be disconnected.\n");
 275                 sleep(2);
 276         }
 277
 278 #if 0
 279         /* query available isdn ports */
 280         if (!(strcasecmp(argv[1],"route"))) {
 281                 ruleset_debug(ruleset_first);
 282                 ret = 0;
 283                 goto free;
 284         }
 285 #endif
 286
 287         /* do fork in special cases */
 288         if (!(strcasecmp(argv[1],"fork"))) {
 289                 pid_t pid;
 290                 FILE *pidfile;
 291
 292                 /* do daemon fork */
 293                 pid = fork();
 294
 295                 if (pid < 0) {
 296                         fprintf(stderr, "Cannot fork!\n");
 297                         goto free;
 298                 }
 299                 if (pid != 0) {
 300                         exit(0);
 301                 }
 302                 usleep(200000);
 303                 printf("\n");
 304
 305                 /* do second fork */
 306                 pid = fork();
 307
 308                 if (pid < 0) {
 309                         fprintf(stderr, "Cannot fork!\n");
 310                         goto free;
 311                 }
 312                 if (pid != 0) {
 313                         printf("LCR: Starting daemon.\n");
 314                         exit(0);
 315                 }
 316                 nooutput = 1;
 317
 318                 /* write pid file */
 319                 pidfile = fopen("/var/run/lcr.pid","w");
 320                 if (pidfile) {
 321                         fprintf(pidfile, "%d\n", getpid());
 322                         fclose(pidfile);
 323                 }
 324         } else
 325         /* if not start */
 326         if (!!strcasecmp(argv[1],"start")) {
 327                 goto usage;
 328         }
 329
 330         /* create lock and lock! */
 331         SPRINT(lock, "%s/lcr.lock", options.lock);
 332         if ((lockfd = open(lock, O_CREAT | O_WRONLY, S_IWUSR)) < 0) {
 333                 fprintf(stderr, "Cannot create lock file: %s\n", lock);
 334                 fprintf(stderr, "Check options.conf to change to path with permissions for you.\n");
 335                 goto free;
 336         }
 337         if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 338                 if (errno == EWOULDBLOCK)
 339                         fprintf(stderr, "LCR: Another LCR process is running. Please kill the other one.\n");
 340                 else    fprintf(stderr, "Locking process failed: errno=%d\n", errno);
 341                 goto free;
 342         }
 343         created_lock = 1;
 344
 345         /* initialize admin socket */
 346         if (admin_init()) {
 347                 fprintf(stderr, "Unable to initialize admin socket.\n");
 348                 goto free;
 349         }
 350
 351         /* generate alaw / ulaw tables */
 352         generate_tables(options.law);
 353
 354 #ifdef WITH_SS5
 355         /* init ss5 sine tables */
 356         ss5_sine_generate();
 357         ss5_test_decode();
 358 #endif
 359
 360         /* load tones (if requested) */
 361         if (fetch_tones() == 0) {
 362                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 363                 goto free;
 364         }
 365
 366 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 367         /* handle gsm */
 368         if (options.gsm && gsm_init()) {
 369                 fprintf(stderr, "GSM initialization failed.\n");
 370                 goto free;
 371         }
 372 #else
 373         if (options.gsm) {
 374                 fprintf(stderr, "GSM is enabled, but not compiled. Use --with-gsm-bs or --with-gsm-ms while configure!\n");
 375                 goto free;
 376         }
 377 #endif
 378 #ifdef WITH_GSM_BS
 379         if (options.gsm && gsm_bs_init()) {
 380                 fprintf(stderr, "GSM BS initialization failed.\n");
 381                 goto free;
 382         }
 383 #endif
 384 #ifdef WITH_GSM_MS
 385         if (options.gsm && gsm_ms_init()) {
 386                 fprintf(stderr, "GSM MS initialization failed.\n");
 387                 goto free;
 388         }
 389 #endif
 390
 391         /* read interfaces and open ports */
 392         if (!read_interfaces()) {
 393                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 394                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 395                 goto free;
 396         }
 397         relink_interfaces();
 398         interface_first = interface_newlist;
 399         interface_newlist = NULL;
 400
 401         /* locking memory paging */
 402         i = 0;
 403         while(i < 10) {
 404                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 405                         break;
 406                 usleep(200000);
 407                 i++;
 408         }
 409         if (i == 10) {
 410                 switch(errno) {
 411                         case ENOMEM:
 412                         fprintf(stderr, "Warning: Not enough memory to lock paging.\n");
 413                         break;
 414                         case EPERM:
 415                         fprintf(stderr, "Warning: No permission to lock paging.\n");
 416                         break;
 417                         case EFAULT:
 418                         fprintf(stderr, "Warning: 'Bad address' while locking paging.\n");
 419                         break;
 420                         default:
 421                         fprintf(stderr, "Warning: Unknown error %d while locking paging.\n", errno);
 422                 }
 423         }
 424
 425         /* set real time scheduler & priority */
 426         if (options.schedule > 1) {
 427                 memset(&schedp, 0, sizeof(schedp));
 428                 schedp.sched_priority = options.schedule;
 429                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 430                 if (ret < 0) {
 431                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 432                         goto free;
 433                 }
 434         }
 435
 436         /* signal handlers */
 437         signal(SIGINT,sighandler);
 438         signal(SIGHUP,sighandler);
 439         signal(SIGTERM,sighandler);
 440         signal(SIGPIPE,sighandler);
 441         created_signal = 1;
 442
 443         /* init message */
 444         init_message();
 445
 446         /*** main loop ***/
 447         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 448         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 449         printf("%s\n", tracetext);
 450         end_trace();
 451         quit = 0;
 452 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 453         GET_NOW();
 454 #endif
 455         while(!quit) {
 456 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 457                 last_d = now_d;
 458                 GET_NOW();
 459                 if (now_d-last_d > 1.0) {
 460                         PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
 461                 }
 462                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 463                 all_idle = 1;
 464
 465                 /* must be processed after all queues, so they are empty */
 466                 if (select_main(1, NULL, NULL, NULL))
 467                         all_idle = 0;
 468                 /* handle gsm */
 469                 if (options.gsm) {
 470                         if (handle_gsm())
 471                                 all_idle = 0;
 472 #ifdef WITH_GSM_BS
 473                         if (handle_gsm_bs())
 474                                 all_idle = 0;
 475 #endif
 476 #ifdef WITH_GSM_MS
 477                         if (handle_gsm_ms())
 478                                 all_idle = 0;
 479 #endif
 480                 }
 481                 if (all_idle) {
 482                         usleep(10000);
 483                 }
 484 #else
 485                 if (options.polling)
 486                         if (!select_main(1, NULL, NULL, NULL))
 487                                 usleep(10000);
 488                 else
 489                         select_main(0, NULL, NULL, NULL);
 490 #endif
 491         }
 492         SPRINT(tracetext, "%s terminated", NAME);
 493         printf("%s\n", tracetext);
 494         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 495         if (quit > 0)
 496                 add_trace((char *)"signal", NULL, "%d", quit);
 497         if (quit < 0)
 498                 add_trace((char *)"errno", NULL, "%d", quit);
 499         end_trace();
 500         ret=0;
 501
 502         /* clean messacleane */
 503         cleanup_message();
 504
 505         /* free all */
 506 free:
 507
 508         /* set scheduler & priority
 509          */
 510         if (options.schedule > 1) {
 511                 memset(&schedp, 0, sizeof(schedp));
 512                 schedp.sched_priority = options.schedule;
 513                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 514         }
 515         /* reset signals */
 516         if (created_signal) {
 517                 signal(SIGINT,SIG_DFL);
 518                 signal(SIGHUP,SIG_DFL);
 519                 signal(SIGTERM,SIG_DFL);
 520                 signal(SIGPIPE,SIG_DFL);
 521         }
 522
 523         /* destroy objects */
 524
 525         while(port_first) {
 526                 debug_count++;
 527                 delete port_first;
 528         }
 529         while(epoint_first) {
 530                 debug_count++;
 531                 delete epoint_first;
 532         }
 533         epoint_first = NULL;
 534         debug_count++;
 535         join_free();
 536
 537         /* free interfaces */
 538         if (interface_first)
 539                 free_interfaces(interface_first);
 540         interface_first = NULL;
 541
 542         /* close isdn ports */
 543         mISDNport_close_all();
 544
 545         /* flush messages */
 546         debug_count++;
 547         i = 0;
 548         while ((message = message_get())) {
 549                 i++;
 550                 message_free(message);
 551         }
 552         if (i) {
 553                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 554         }
 555
 556         /* free tones */
 557         if (toneset_first)
 558                 free_tones();
 559
 560         /* free admin socket */
 561         admin_cleanup();
 562
 563         /* close lock */
 564         if (created_lock)
 565                 flock(lockfd, LOCK_UN);
 566         if (lockfd >= 0) {
 567                 chmod(lock, 0700);
 568                 unlink(lock);
 569                 close(lockfd);
 570         }
 571
 572         /* free rulesets */
 573         if (ruleset_first)
 574                 ruleset_free(ruleset_first);
 575         ruleset_first = NULL;
 576
 577         /* free mutex */
 578         if (created_mutexe)
 579                 if (pthread_mutex_destroy(&mutexe))
 580                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 581 //      if (created_mutext)
 582 //              if (pthread_mutex_destroy(&mutext))
 583 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 584         if (created_mutexd)
 585                 if (pthread_mutex_destroy(&mutexd))
 586                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 587
 588         /* deinitialize mISDN */
 589         if (created_misdn)
 590                 mISDN_deinitialize();
 591
 592         /* free gsm */
 593         if (options.gsm) {
 594 #ifdef WITH_GSM_BS
 595                 gsm_bs_exit(0);
 596 #endif
 597 #ifdef WITH_GSM_MS
 598                 gsm_ms_exit(0);
 599 #endif
 600 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 601                 gsm_exit(0);
 602 #endif
 603         }
 604
 605         /* display memory leak */
 606 #define MEMCHECK(a, b) \
 607         if (b) { \
 608                 SPRINT(tracetext, a, NAME); \
 609                 start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 610                 if (ret) add_trace("blocks", NULL, "%d", b); \
 611                 end_trace(); \
 612                 printf("\n******************************\n\007"); \
 613                 printf("\nERROR: %d %s\n", b, a); \
 614                 printf("\n******************************\n"); \
 615                 ret = -1; \
 616         }
 617         MEMCHECK("",memuse)
 618         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 619         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 620         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 621         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 622         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 623         MEMCHECK("memory block(s) left (args)",amemuse)
 624         MEMCHECK("class(es) left",classuse)
 625         MEMCHECK("file descriptor(s) left",fduse)
 626         MEMCHECK("file handler(s) left",fhuse)
 627
 628         /* unlock LCR process */
 629 //      pthread_mutex_unlock(&mutex_lcr);
 630
 631         /* take me out */
 632         return(ret);
 633 }
 634
 635
 636