main.c

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** Linux Call Router                                                         **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** Main function                                                             **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 #include "main.h"
  13 #ifdef PACKAGE_VERSION
  14 #undef PACKAGE_VERSION
  15 #endif
  16 #include "config.h"
  17
  18 //MESSAGES
  19
  20 struct timeval now_tv;
  21 struct timezone now_tz;
  22 #define GET_NOW() \
  23         { \
  24                 gettimeofday(&now_tv, &now_tz); \
  25                 now_d = ((double)(now_tv.tv_usec))/1000000 + now_tv.tv_sec; \
  26         }
  27
  28 FILE *debug_fp = NULL;
  29 int quit = 0;
  30
  31 #if 0
  32 struct lcr_fdset lcr_fdset[FD_SETSIZE];
  33 #endif
  34
  35 pthread_mutex_t mutexd; // debug output mutex
  36 pthread_mutex_t mutext; // trace output mutex
  37 pthread_mutex_t mutexe; // error output mutex
  38 //pthread_mutex_t mutex_lcr; // lcr process mutex
  39
  40 int memuse = 0;
  41 int mmemuse = 0;
  42 int cmemuse = 0;
  43 int ememuse = 0;
  44 int pmemuse = 0;
  45 int amemuse = 0;
  46 int rmemuse = 0;
  47 int classuse = 0;
  48 int fduse = 0;
  49 int fhuse = 0;
  50
  51 int debug_count = 0;
  52 int last_debug = 0;
  53 int debug_newline = 1;
  54 int nooutput = 0;
  55
  56 void debug(const char *function, int line, const char *prefix, char *buffer)
  57 {
  58         time_t now;
  59         struct tm *now_tm;
  60
  61         /* if we have a new debug count, we add a mark */
  62         if (last_debug != debug_count) {
  63                 last_debug = debug_count;
  64                 time(&now);
  65                 now_tm = localtime(&now);
  66                 if (!nooutput)
  67                         printf("\033[34m--------------------- %04d.%02d.%02d %02d:%02d:%02d %06d\033[36m\n", now_tm->tm_year+1900, now_tm->tm_mon+1, now_tm->tm_mday, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec, debug_count%1000000);
  68                 if (debug_fp)
  69                         fprintf(debug_fp, "--------------------- %04d.%02d.%02d %02d:%02d:%02d %06d\n", now_tm->tm_year+1900, now_tm->tm_mon+1, now_tm->tm_mday, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec, debug_count%1000000);
  70         }
  71
  72         if (!nooutput) {
  73                 if (debug_newline)
  74                         printf("\033[32m%06d %s\033[37m%s", debug_count%1000000, prefix?prefix:"", prefix?" ":"");
  75                 if (function)
  76                         printf("(in %s() line %d): %s", function, line, buffer);
  77                 else
  78                         printf("%s", buffer);
  79         }
  80
  81         if (debug_fp) {
  82                 if (debug_newline) {
  83                         if (function)
  84                                 fprintf(debug_fp, "%s%s(in %s() line %d): %s", prefix?prefix:"", prefix?" ":"", function, line, buffer);
  85                         else
  86                                 fprintf(debug_fp, "%s%s: %s", prefix?prefix:"", prefix?" ":"", buffer);
  87                         fflush(debug_fp);
  88                 }
  89         }
  90
  91         debug_newline = 0;
  92         if (buffer[0])
  93                 if (buffer[strlen(buffer)-1] == '\n')
  94                         debug_newline = 1;
  95 }
  96
  97
  98 void _printdebug(const char *function, int line, unsigned int mask, const char *fmt, ...)
  99 {
 100         char buffer[4096];
 101         va_list args;
 102
 103         if (!(options.deb & mask))
 104                 return;
 105         pthread_mutex_lock(&mutexd);
 106
 107         va_start(args,fmt);
 108         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 109         buffer[sizeof(buffer)-1]=0;
 110         va_end(args);
 111
 112         debug(function, line, "DEBUG", buffer);
 113
 114         pthread_mutex_unlock(&mutexd);
 115 }
 116
 117 void _printerror(const char *function, int line, const char *fmt, ...)
 118 {
 119         char buffer[4096];
 120         va_list args;
 121
 122         pthread_mutex_lock(&mutexe);
 123
 124         va_start(args,fmt);
 125         VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
 126         buffer[sizeof(buffer)-1]=0;
 127         va_end(args);
 128
 129         if (options.deb)
 130                 debug(function, line, "ERROR", buffer);
 131         else { /* only if we do not debug */
 132                 if (function)
 133                         fprintf(stderr, "ERROR (in %s() line %d) %s", function, line, buffer);
 134                 else
 135                         fprintf(stderr, "ERROR %s", buffer);
 136         }
 137
 138         pthread_mutex_unlock(&mutexe);
 139 }
 140
 141
 142 void sighandler(int sigset)
 143 {
 144         struct sched_param schedp;
 145
 146         if (sigset == SIGHUP)
 147                 return;
 148         if (sigset == SIGPIPE)
 149                 return;
 150         fprintf(stderr, "LCR: Signal received: %d\n", sigset);
 151         PDEBUG(DEBUG_LOG, "Signal received: %d\n", sigset);
 152         if (!quit) {
 153                 quit = sigset;
 154                 /* set scheduler & priority */
 155                 if (options.schedule > 1) {
 156                         memset(&schedp, 0, sizeof(schedp));
 157                         schedp.sched_priority = 0;
 158                         sched_setscheduler(0, SCHED_OTHER, &schedp);
 159                 }
 160         }
 161 }
 162
 163
 164 /*
 165  * the main
 166  */
 167 int main(int argc, char *argv[])
 168 {
 169 #if 0
 170         double                  now_d, last_d;
 171         int                     all_idle;
 172 #endif
 173         int                     ret = -1;
 174         int                     lockfd = -1; /* file lock */
 175         struct lcr_msg          *message;
 176         int                     i;
 177         struct sched_param      schedp;
 178         int                     created_mutexd = 0,/* created_mutext = 0,*/ created_mutexe = 0,
 179                                 created_lock = 0, created_signal = 0, created_debug = 0,
 180                                 created_misdn = 0;
 181         char                    tracetext[256], lock[128];
 182         char                    options_error[256];
 183
 184 #if 0
 185         /* init fdset */
 186         memset(lcr_fdset, 0, sizeof(lcr_fdset));
 187 #endif
 188
 189         /* lock LCR process */
 190 //      pthread_mutex_lock(&mutex_lcr);
 191
 192         /* show version */
 193         printf("\n** %s  Version %s\n\n", NAME, VERSION_STRING);
 194
 195         /* show options */
 196         if (argc <= 1) {
 197                 usage:
 198                 printf("\n");
 199                 printf("Usage: lcr (query | start | fork | rules | route)\n");
 200                 printf("query     = Show available isdn ports.\n");
 201                 printf("start     = Run lcr normally, abort with CTRL+C.\n");
 202                 printf("fork      = Do daemon fork and run as background process.\n");
 203                 printf("interface = Get help of available interface syntax.\n");
 204                 printf("rules     = Get help of available routing rule syntax.\n");
 205                 printf("rules [action] = Get individual help for given action.\n");
 206 //              printf("route = Show current routing as it is parsed.\n");
 207                 printf("\n");
 208                 ret = 999;
 209                 goto free;
 210         }
 211
 212         /* init crc */
 213         crc_init();
 214
 215         /* the mutex init */
 216         if (pthread_mutex_init(&mutexd, NULL)) {
 217                 fprintf(stderr, "cannot create 'PDEBUG' mutex\n");
 218                 goto free;
 219         }
 220         created_mutexd = 1;
 221 //      if (pthread_mutex_init(&mutext, NULL)) {
 222 //              fprintf(stderr, "cannot create 'trace' mutex\n");
 223 //              goto free;
 224 //      }
 225 //      created_mutext = 1;
 226         if (pthread_mutex_init(&mutexe, NULL)) {
 227                 fprintf(stderr, "cannot create 'PERROR' mutex\n");
 228                 goto free;
 229         }
 230         created_mutexe = 1;
 231
 232         /* show interface */
 233         if (!(strcasecmp(argv[1],"interface"))) {
 234                 doc_interface();
 235                 ret = 0;
 236                 goto free;
 237         }
 238
 239         /* show rules */
 240         if (!(strcasecmp(argv[1],"rules"))) {
 241                 if (argc <= 2)
 242                         doc_rules(NULL);
 243                 else
 244                         doc_rules(argv[2]);
 245                 ret = 0;
 246                 goto free;
 247         }
 248
 249         /* query available isdn ports */
 250         if (!(strcasecmp(argv[1],"query"))) {
 251                 int rc;
 252                 fprintf(stderr, "-> Using 'misdn_info'\n");
 253                 rc = system("misdn_info");
 254                 ret = 0;
 255                 goto free;
 256         }
 257
 258         /* read options */
 259         if (read_options(options_error) == 0) {
 260                 PERROR("%s", options_error);
 261                 goto free;
 262         }
 263
 264         /* init mISDN */
 265         if (mISDN_initialize() < 0)
 266                 goto free;
 267         created_misdn = 1;
 268         created_debug = 1;
 269
 270         /* read ruleset(s) */
 271         if (!(ruleset_first = ruleset_parse()))
 272                 goto free;
 273
 274         /* set pointer to main ruleset */
 275         ruleset_main = getrulesetbyname("main");
 276         if (!ruleset_main) {
 277                 fprintf(stderr, "\n***\n -> Missing 'main' ruleset, causing ALL calls to be disconnected.\n***\n\n");
 278                 PDEBUG(DEBUG_LOG, "Missing 'main' ruleset, causing ALL calls to be disconnected.\n");
 279                 sleep(2);
 280         }
 281
 282 #if 0
 283         /* query available isdn ports */
 284         if (!(strcasecmp(argv[1],"route"))) {
 285                 ruleset_debug(ruleset_first);
 286                 ret = 0;
 287                 goto free;
 288         }
 289 #endif
 290
 291         /* do fork in special cases */
 292         if (!(strcasecmp(argv[1],"fork"))) {
 293                 pid_t pid;
 294                 FILE *pidfile;
 295
 296                 /* do daemon fork */
 297                 pid = fork();
 298
 299                 if (pid < 0) {
 300                         fprintf(stderr, "Cannot fork!\n");
 301                         goto free;
 302                 }
 303                 if (pid != 0) {
 304                         exit(0);
 305                 }
 306                 usleep(200000);
 307                 printf("\n");
 308
 309                 /* do second fork */
 310                 pid = fork();
 311
 312                 if (pid < 0) {
 313                         fprintf(stderr, "Cannot fork!\n");
 314                         goto free;
 315                 }
 316                 if (pid != 0) {
 317                         printf("LCR: Starting daemon.\n");
 318                         exit(0);
 319                 }
 320                 nooutput = 1;
 321
 322                 /* write pid file */
 323                 pidfile = fopen("/var/run/lcr.pid","w");
 324                 if (pidfile) {
 325                         fprintf(pidfile, "%d\n", getpid());
 326                         fclose(pidfile);
 327                 }
 328         } else
 329         /* if not start */
 330         if (!!strcasecmp(argv[1],"start")) {
 331                 goto usage;
 332         }
 333
 334         /* create lock and lock! */
 335         SPRINT(lock, "%s/lcr.lock", options.lock);
 336         if ((lockfd = open(lock, O_CREAT | O_WRONLY, S_IWUSR)) < 0) {
 337                 fprintf(stderr, "Cannot create lock file: %s\n", lock);
 338                 fprintf(stderr, "Check options.conf to change to path with permissions for you.\n");
 339                 goto free;
 340         }
 341         if (flock(lockfd, LOCK_EX|LOCK_NB) < 0) {
 342                 if (errno == EWOULDBLOCK)
 343                         fprintf(stderr, "LCR: Another LCR process is running. Please kill the other one.\n");
 344                 else    fprintf(stderr, "Locking process failed: errno=%d\n", errno);
 345                 goto free;
 346         }
 347         created_lock = 1;
 348
 349         /* initialize admin socket */
 350         if (admin_init()) {
 351                 fprintf(stderr, "Unable to initialize admin socket.\n");
 352                 goto free;
 353         }
 354
 355         /* generate alaw / ulaw tables */
 356         generate_tables(options.law);
 357
 358 #ifdef WITH_SS5
 359         /* init ss5 sine tables */
 360         ss5_sine_generate();
 361         ss5_test_decode();
 362 #endif
 363
 364         /* load tones (if requested) */
 365         if (fetch_tones() == 0) {
 366                 fprintf(stderr, "Unable to fetch tones into memory.\n");
 367                 goto free;
 368         }
 369
 370 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 371         /* init gsm */
 372         if (gsm_init()) {
 373                 fprintf(stderr, "GSM initialization failed.\n");
 374                 goto free;
 375         }
 376 #endif
 377 #if 0
 378 init is done when interface is up
 379 #ifdef WITH_GSM_BS
 380         if (gsm_bs_init()) {
 381                 fprintf(stderr, "GSM BS initialization failed.\n");
 382                 goto free;
 383         }
 384 #endif
 385 #endif
 386 #ifdef WITH_GSM_MS
 387         if (gsm_ms_init()) {
 388                 fprintf(stderr, "GSM MS initialization failed.\n");
 389                 goto free;
 390         }
 391 #endif
 392
 393         /* read interfaces and open ports */
 394         if (!read_interfaces()) {
 395                 PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
 396                 fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
 397                 goto free;
 398         }
 399         relink_interfaces();
 400         interface_first = interface_newlist;
 401         interface_newlist = NULL;
 402
 403         /* locking memory paging */
 404         i = 0;
 405         while(i < 10) {
 406                 if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
 407                         break;
 408                 usleep(200000);
 409                 i++;
 410         }
 411         if (i == 10) {
 412                 switch(errno) {
 413                         case ENOMEM:
 414                         fprintf(stderr, "Warning: Not enough memory to lock paging.\n");
 415                         break;
 416                         case EPERM:
 417                         fprintf(stderr, "Warning: No permission to lock paging.\n");
 418                         break;
 419                         case EFAULT:
 420                         fprintf(stderr, "Warning: 'Bad address' while locking paging.\n");
 421                         break;
 422                         default:
 423                         fprintf(stderr, "Warning: Unknown error %d while locking paging.\n", errno);
 424                 }
 425         }
 426
 427         /* set real time scheduler & priority */
 428         if (options.schedule > 1) {
 429                 memset(&schedp, 0, sizeof(schedp));
 430                 schedp.sched_priority = options.schedule;
 431                 ret = sched_setscheduler(0, SCHED_RR, &schedp);
 432                 if (ret < 0) {
 433                         PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
 434                         goto free;
 435                 }
 436         }
 437
 438         /* signal handlers */
 439         signal(SIGINT,sighandler);
 440         signal(SIGHUP,sighandler);
 441         signal(SIGTERM,sighandler);
 442         signal(SIGPIPE,sighandler);
 443         created_signal = 1;
 444
 445         /* init message */
 446         init_message();
 447
 448         /*** main loop ***/
 449         SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
 450         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 451         printf("%s\n", tracetext);
 452         end_trace();
 453         quit = 0;
 454 #if 0
 455         GET_NOW();
 456 #endif
 457         while(!quit) {
 458 #if 0
 459                 last_d = now_d;
 460                 GET_NOW();
 461                 if (now_d-last_d > 1.0) {
 462                         PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
 463                 }
 464                 /* all loops must be counted from the beginning since nodes might get freed during handler */
 465                 all_idle = 1;
 466
 467                 /* must be processed after all queues, so they are empty */
 468                 if (select_main(1, NULL, NULL, NULL))
 469                         all_idle = 0;
 470                 if (all_idle) {
 471                         usleep(10000);
 472                 }
 473 #else
 474                 if (options.polling) {
 475                         if (!select_main(1, NULL, NULL, NULL))
 476                                 usleep(10000);
 477                 } else
 478                         select_main(0, NULL, NULL, NULL);
 479 #endif
 480         }
 481         SPRINT(tracetext, "%s terminated", NAME);
 482         printf("%s\n", tracetext);
 483         start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext);
 484         if (quit > 0)
 485                 add_trace((char *)"signal", NULL, "%d", quit);
 486         if (quit < 0)
 487                 add_trace((char *)"errno", NULL, "%d", quit);
 488         end_trace();
 489         ret=0;
 490
 491         /* clean messacleane */
 492         cleanup_message();
 493
 494         /* free all */
 495 free:
 496
 497         /* set scheduler & priority
 498          */
 499         if (options.schedule > 1) {
 500                 memset(&schedp, 0, sizeof(schedp));
 501                 schedp.sched_priority = options.schedule;
 502                 sched_setscheduler(0, SCHED_OTHER, &schedp);
 503         }
 504         /* reset signals */
 505         if (created_signal) {
 506                 signal(SIGINT,SIG_DFL);
 507                 signal(SIGHUP,SIG_DFL);
 508                 signal(SIGTERM,SIG_DFL);
 509                 signal(SIGPIPE,SIG_DFL);
 510         }
 511
 512         /* destroy objects */
 513
 514         while(port_first) {
 515                 debug_count++;
 516                 delete port_first;
 517         }
 518         while(epoint_first) {
 519                 debug_count++;
 520                 delete epoint_first;
 521         }
 522         epoint_first = NULL;
 523         debug_count++;
 524         join_free();
 525
 526         /* free interfaces */
 527         if (interface_first)
 528                 free_interfaces(interface_first);
 529         interface_first = NULL;
 530
 531         /* close isdn ports */
 532         mISDNport_close_all();
 533
 534         /* flush messages */
 535         debug_count++;
 536         i = 0;
 537         while ((message = message_get())) {
 538                 i++;
 539                 message_free(message);
 540         }
 541         if (i) {
 542                 PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
 543         }
 544
 545         /* free tones */
 546         if (toneset_first)
 547                 free_tones();
 548
 549         /* free admin socket */
 550         admin_cleanup();
 551
 552         /* close lock */
 553         if (created_lock)
 554                 flock(lockfd, LOCK_UN);
 555         if (lockfd >= 0) {
 556                 chmod(lock, 0700);
 557                 unlink(lock);
 558                 close(lockfd);
 559         }
 560
 561         /* free rulesets */
 562         if (ruleset_first)
 563                 ruleset_free(ruleset_first);
 564         ruleset_first = NULL;
 565
 566         /* free mutex */
 567         if (created_mutexe)
 568                 if (pthread_mutex_destroy(&mutexe))
 569                         fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
 570 //      if (created_mutext)
 571 //              if (pthread_mutex_destroy(&mutext))
 572 //                      fprintf(stderr, "cannot destroy 'trace' mutex\n");
 573         if (created_mutexd)
 574                 if (pthread_mutex_destroy(&mutexd))
 575                         fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
 576
 577         /* deinitialize mISDN */
 578         if (created_misdn)
 579                 mISDN_deinitialize();
 580
 581         /* free gsm */
 582 #if 0
 583 exit is done when interface is down
 584 #ifdef WITH_GSM_BS
 585         gsm_bs_exit(0);
 586 #endif
 587 #endif
 588 #ifdef WITH_GSM_MS
 589         gsm_ms_exit(0);
 590 #endif
 591 #if defined WITH_GSM_BS || defined WITH_GSM_MS
 592         gsm_exit(0);
 593 #endif
 594
 595         /* close loopback, if used by GSM or remote */
 596         if (mISDNloop.sock > -1)
 597                 mISDNloop_close();
 598
 599         /* display memory leak */
 600 #define MEMCHECK(a, b) \
 601         if (b) { \
 602                 SPRINT(tracetext, a, NAME); \
 603                 start_trace(-1, NULL, NULL, NULL, 0, 0, 0, tracetext); \
 604                 if (ret) add_trace("blocks", NULL, "%d", b); \
 605                 end_trace(); \
 606                 printf("\n******************************\n\007"); \
 607                 printf("\nERROR: %d %s\n", b, a); \
 608                 printf("\n******************************\n"); \
 609                 ret = -1; \
 610         }
 611         MEMCHECK("",memuse)
 612         MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
 613         MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
 614         MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
 615         MEMCHECK("memory block(s) left (message.c)",mmemuse)
 616         MEMCHECK("memory block(s) left (route.c)",rmemuse)
 617         MEMCHECK("memory block(s) left (args)",amemuse)
 618         MEMCHECK("class(es) left",classuse)
 619         MEMCHECK("file descriptor(s) left",fduse)
 620         MEMCHECK("file handler(s) left",fhuse)
 621
 622         /* unlock LCR process */
 623 //      pthread_mutex_unlock(&mutex_lcr);
 624
 625         /* take me out */
 626         return(ret);
 627 }
 628
 629
 630