webcit/webserver.c

   1 /*
   2  * $Id$
   3  *
   4  * This contains a simple multithreaded TCP server manager.  It sits around
   5  * waiting on the specified port for incoming HTTP connections.  When a
   6  * connection is established, it calls context_loop() from context_loop.c.
   7  *
   8  * Copyright (c) 1996-2009 by the citadel.org developers.
   9  * This program is released under the terms of the GNU General Public License v3.
  10  *
  11  */
  12
  13 #include "webcit.h"
  14 #include "webserver.h"
  15
  16 #if HAVE_BACKTRACE
  17 #include <execinfo.h>
  18 #endif
  19 #include "modules_init.h"
  20 #ifndef HAVE_SNPRINTF
  21 int vsnprintf(char *buf, size_t max, const char *fmt, va_list argp);
  22 #endif
  23
  24 int verbosity = 9;              /* Logging level */
  25 int msock;                      /* master listening socket */
  26 int is_https = 0;               /* Nonzero if I am an HTTPS service */
  27 int follow_xff = 0;             /* Follow X-Forwarded-For: header */
  28 int home_specified = 0;         /* did the user specify a homedir? */
  29 int time_to_die = 0;            /* Nonzero if server is shutting down */
  30 int DisableGzip = 0;
  31 extern void *context_loop(int*);
  32 extern void *housekeeping_loop(void);
  33 extern pthread_mutex_t SessionListMutex;
  34 extern pthread_key_t MyConKey;
  35
  36 extern int ig_tcp_server(char *ip_addr, int port_number, int queue_len);
  37 extern int ig_uds_server(char *sockpath, int queue_len);
  38
  39
  40 char ctdl_key_dir[PATH_MAX]=SSL_DIR;
  41 char file_crpt_file_key[PATH_MAX]="";
  42 char file_crpt_file_csr[PATH_MAX]="";
  43 char file_crpt_file_cer[PATH_MAX]="";
  44
  45 char socket_dir[PATH_MAX];                      /* where to talk to our citadel server */
  46 const char editor_absolut_dir[PATH_MAX]=EDITORDIR;      /* nailed to what configure gives us. */
  47 char static_dir[PATH_MAX];              /* calculated on startup */
  48 char static_local_dir[PATH_MAX];                /* calculated on startup */
  49 char static_icon_dir[PATH_MAX];          /* where should we find our mime icons? */
  50 char  *static_dirs[]={                          /* needs same sort order as the web mapping */
  51         (char*)static_dir,                      /* our templates on disk */
  52         (char*)static_local_dir,                /* user provided templates disk */
  53         (char*)editor_absolut_dir,              /* the editor on disk */
  54         (char*)static_icon_dir                  /* our icons... */
  55 };
  56
  57 /*
  58  * Subdirectories from which the client may request static content
  59  *
  60  * (If you add more, remember to increment 'ndirs' below)
  61  */
  62 char *static_content_dirs[] = {
  63         "static",                     /* static templates */
  64         "static.local",               /* site local static templates */
  65         "tiny_mce"                    /* rich text editor */
  66 };
  67
  68 int ndirs=3;
  69
  70
  71 char *server_cookie = NULL;     /* our Cookie connection to the client */
  72 int http_port = PORT_NUM;       /* Port to listen on */
  73 char *ctdlhost = DEFAULT_HOST;  /* our name */
  74 char *ctdlport = DEFAULT_PORT;  /* our Port */
  75 int setup_wizard = 0;           /* should we run the setup wizard? \todo */
  76 char wizard_filename[PATH_MAX]; /* where's the setup wizard? */
  77 int running_as_daemon = 0;      /* should we deamonize on startup? */
  78
  79
  80
  81 /*
  82  * Shut us down the regular way.
  83  * signum is the signal we want to forward
  84  */
  85 pid_t current_child;
  86 void graceful_shutdown_watcher(int signum) {
  87         lprintf (1, "bye; shutting down watcher.");
  88         kill(current_child, signum);
  89         if (signum != SIGHUP)
  90                 exit(0);
  91 }
  92
  93
  94
  95
  96 /*
  97  * Shut us down the regular way.
  98  * signum is the signal we want to forward
  99  */
 100 pid_t current_child;
 101 void graceful_shutdown(int signum) {
 102         char wd[SIZ];
 103         FILE *FD;
 104         int fd;
 105         getcwd(wd, SIZ);
 106         lprintf (1, "bye going down gracefull.[%d][%s]\n", signum, wd);
 107         fd = msock;
 108         msock = -1;
 109         time_to_die = 1;
 110         FD=fdopen(fd, "a+");
 111         fflush (FD);
 112         fclose (FD);
 113         close(fd);
 114 }
 115
 116
 117 /*
 118  * Start running as a daemon.
 119  */
 120 void start_daemon(char *pid_file)
 121 {
 122         int status = 0;
 123         pid_t child = 0;
 124         FILE *fp;
 125         int do_restart = 0;
 126
 127         current_child = 0;
 128
 129         /* Close stdin/stdout/stderr and replace them with /dev/null.
 130          * We don't just call close() because we don't want these fd's
 131          * to be reused for other files.
 132          */
 133         chdir("/");
 134
 135         signal(SIGHUP, SIG_IGN);
 136         signal(SIGINT, SIG_IGN);
 137         signal(SIGQUIT, SIG_IGN);
 138
 139         child = fork();
 140         if (child != 0) {
 141                 exit(0);
 142         }
 143
 144         setsid();
 145         umask(0);
 146         freopen("/dev/null", "r", stdin);
 147         freopen("/dev/null", "w", stdout);
 148         freopen("/dev/null", "w", stderr);
 149         signal(SIGTERM, graceful_shutdown_watcher);
 150         signal(SIGHUP, graceful_shutdown_watcher);
 151
 152         do {
 153                 current_child = fork();
 154
 155
 156                 if (current_child < 0) {
 157                         perror("fork");
 158                         ShutDownLibCitadel ();
 159                         exit(errno);
 160                 }
 161
 162                 else if (current_child == 0) {  /* child process */
 163                         signal(SIGHUP, graceful_shutdown);
 164
 165                         return; /* continue starting webcit. */
 166                 }
 167                 else { /* watcher process */
 168                         if (pid_file) {
 169                                 fp = fopen(pid_file, "w");
 170                                 if (fp != NULL) {
 171                                         fprintf(fp, "%d\n", getpid());
 172                                         fclose(fp);
 173                                 }
 174                         }
 175                         waitpid(current_child, &status, 0);
 176                 }
 177
 178                 do_restart = 0;
 179
 180                 /* Did the main process exit with an actual exit code? */
 181                 if (WIFEXITED(status)) {
 182
 183                         /* Exit code 0 means the watcher should exit */
 184                         if (WEXITSTATUS(status) == 0) {
 185                                 do_restart = 0;
 186                         }
 187
 188                         /* Exit code 101-109 means the watcher should exit */
 189                         else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
 190                                 do_restart = 0;
 191                         }
 192
 193                         /* Any other exit code means we should restart. */
 194                         else {
 195                                 do_restart = 1;
 196                         }
 197                 }
 198
 199                 /* Any other type of termination (signals, etc.) should also restart. */
 200                 else {
 201                         do_restart = 1;
 202                 }
 203
 204         } while (do_restart);
 205
 206         if (pid_file) {
 207                 unlink(pid_file);
 208         }
 209         ShutDownLibCitadel ();
 210         exit(WEXITSTATUS(status));
 211 }
 212
 213 /*
 214  * Spawn an additional worker thread into the pool.
 215  */
 216 void spawn_another_worker_thread()
 217 {
 218         pthread_t SessThread;   /* Thread descriptor */
 219         pthread_attr_t attr;    /* Thread attributes */
 220         int ret;
 221
 222         lprintf(3, "Creating a new thread\n");
 223
 224         /* set attributes for the new thread */
 225         pthread_attr_init(&attr);
 226         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 227
 228         /*
 229          * Our per-thread stacks need to be bigger than the default size, otherwise
 230          * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
 231          * 64-bit Linux.
 232          */
 233         if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
 234                 lprintf(1, "pthread_attr_setstacksize: %s\n",
 235                         strerror(ret));
 236                 pthread_attr_destroy(&attr);
 237         }
 238
 239         /* now create the thread */
 240         if (pthread_create(&SessThread, &attr,
 241                            (void *(*)(void *)) worker_entry, NULL)
 242             != 0) {
 243                 lprintf(1, "Can't create thread: %s\n", strerror(errno));
 244         }
 245
 246         /* free up the attributes */
 247         pthread_attr_destroy(&attr);
 248 }
 249
 250 /* #define DBG_PRINNT_HOOKS_AT_START */
 251 #ifdef DBG_PRINNT_HOOKS_AT_START
 252 const char foobuf[32];
 253 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
 254 #endif
 255 extern int dbg_analyze_msg;
 256 extern int dbg_bactrace_template_errors;
 257 extern int DumpTemplateI18NStrings;
 258 extern StrBuf *I18nDump;
 259 void InitTemplateCache(void);
 260 extern int LoadTemplates;
 261
 262 extern HashList *HandlerHash;
 263
 264
 265 void
 266 webcit_calc_dirs_n_files(int relh, const char *basedir, int home, char *webcitdir, char *relhome)
 267 {
 268         char dirbuffer[PATH_MAX]="";
 269         /* calculate all our path on a central place */
 270     /* where to keep our config */
 271
 272 #define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
 273         snprintf(SUBDIR,sizeof SUBDIR,  "%s%s%s%s%s%s%s", \
 274                          (home&!relh)?webcitdir:basedir, \
 275              ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
 276              ((basedir!=webcitdir)&(home&!relh))?"/":"", \
 277                          relhome, \
 278              (relhome[0]!='\0')?"/":"",\
 279                          dirbuffer,\
 280                          (dirbuffer[0]!='\0')?"/":"");
 281         basedir=RUNDIR;
 282         COMPUTE_DIRECTORY(socket_dir);
 283         basedir=WWWDIR "/static";
 284         COMPUTE_DIRECTORY(static_dir);
 285         basedir=WWWDIR "/static/icons";
 286         COMPUTE_DIRECTORY(static_icon_dir);
 287         basedir=WWWDIR "/static.local";
 288         COMPUTE_DIRECTORY(static_local_dir);
 289
 290         snprintf(file_crpt_file_key,
 291                  sizeof file_crpt_file_key,
 292                  "%s/citadel.key",
 293                  ctdl_key_dir);
 294         snprintf(file_crpt_file_csr,
 295                  sizeof file_crpt_file_csr,
 296                  "%s/citadel.csr",
 297                  ctdl_key_dir);
 298         snprintf(file_crpt_file_cer,
 299                  sizeof file_crpt_file_cer,
 300                  "%s/citadel.cer",
 301                  ctdl_key_dir);
 302
 303         /* we should go somewhere we can leave our coredump, if enabled... */
 304         lprintf(9, "Changing directory to %s\n", socket_dir);
 305         if (chdir(webcitdir) != 0) {
 306                 perror("chdir");
 307         }
 308 }
 309 /*
 310  * Here's where it all begins.
 311  */
 312 int main(int argc, char **argv)
 313 {
 314         pthread_t SessThread;           /* Thread descriptor */
 315         pthread_attr_t attr;            /* Thread attributes */
 316         int a, i;                       /* General-purpose variables */
 317         char tracefile[PATH_MAX];
 318         char ip_addr[256]="0.0.0.0";
 319         int relh=0;
 320         int home=0;
 321         int home_specified=0;
 322         char relhome[PATH_MAX]="";
 323         char webcitdir[PATH_MAX] = DATADIR;
 324         char *pidfile = NULL;
 325         char *hdir;
 326         const char *basedir;
 327 #ifdef ENABLE_NLS
 328         char *locale = NULL;
 329         char *mo = NULL;
 330 #endif /* ENABLE_NLS */
 331         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
 332         const char *I18nDumpFile = NULL;
 333
 334         WildFireInitBacktrace(argv[0], 2);
 335
 336         start_modules ();
 337
 338 #ifdef DBG_PRINNT_HOOKS_AT_START
 339 /*      dbg_PrintHash(HandlerHash, nix, NULL);*/
 340 #endif
 341
 342         /* Ensure that we are linked to the correct version of libcitadel */
 343         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 344                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 345                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 346                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 347                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 348                 return(1);
 349         }
 350
 351         strcpy(uds_listen_path, "");
 352
 353         /* Parse command line */
 354 #ifdef HAVE_OPENSSL
 355         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:G:cfsZ")) != EOF)
 356 #else
 357         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:G:cfZ")) != EOF)
 358 #endif
 359                 switch (a) {
 360                 case 'h':
 361                         hdir = strdup(optarg);
 362                         relh=hdir[0]!='/';
 363                         if (!relh) safestrncpy(webcitdir, hdir,
 364                                                                    sizeof webcitdir);
 365                         else
 366                                 safestrncpy(relhome, relhome,
 367                                                         sizeof relhome);
 368                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 369                         home_specified = 1;
 370                         home=1;
 371                         break;
 372                 case 'd':
 373                         running_as_daemon = 1;
 374                         break;
 375                 case 'D':
 376                         pidfile = strdup(optarg);
 377                         running_as_daemon = 1;
 378                         break;
 379                 case 'i':
 380                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 381                         break;
 382                 case 'p':
 383                         http_port = atoi(optarg);
 384                         if (http_port == 0) {
 385                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 386                         }
 387                         break;
 388                 case 't':
 389                         safestrncpy(tracefile, optarg, sizeof tracefile);
 390                         freopen(tracefile, "w", stdout);
 391                         freopen(tracefile, "w", stderr);
 392                         freopen(tracefile, "r", stdin);
 393                         break;
 394                 case 'T':
 395                         LoadTemplates = atoi(optarg);
 396                         dbg_analyze_msg = (LoadTemplates && (1<<1)) != 0;
 397                         dbg_bactrace_template_errors = (LoadTemplates && (1<<2)) != 0;
 398                         break;
 399                 case 'Z':
 400                         DisableGzip = 1;
 401                         break;
 402                 case 'x':
 403                         verbosity = atoi(optarg);
 404                         break;
 405                 case 'f':
 406                         follow_xff = 1;
 407                         break;
 408                 case 'c':
 409                         server_cookie = malloc(256);
 410                         if (server_cookie != NULL) {
 411                                 safestrncpy(server_cookie,
 412                                        "Set-cookie: wcserver=",
 413                                         256);
 414                                 if (gethostname
 415                                     (&server_cookie[strlen(server_cookie)],
 416                                      200) != 0) {
 417                                         lprintf(2, "gethostname: %s\n",
 418                                                 strerror(errno));
 419                                         free(server_cookie);
 420                                 }
 421                         }
 422                         break;
 423                 case 's':
 424                         is_https = 1;
 425                         break;
 426                 case 'G':
 427                         DumpTemplateI18NStrings = 1;
 428                         I18nDump = NewStrBufPlain(HKEY("int templatestrings(void)\n{\n"));
 429                         I18nDumpFile = optarg;
 430                         break;
 431                 default:
 432                         fprintf(stderr, "usage: webcit "
 433                                 "[-i ip_addr] [-p http_port] "
 434                                 "[-t tracefile] [-c] [-f] "
 435                                 "[-T Templatedebuglevel] "
 436                                 "[-d] [-Z] [-G i18ndumpfile] "
 437 #ifdef HAVE_OPENSSL
 438                                 "[-s] "
 439 #endif
 440                                 "[remotehost [remoteport]]\n");
 441                         return 1;
 442                 }
 443
 444         if (optind < argc) {
 445                 ctdlhost = argv[optind];
 446                 if (++optind < argc)
 447                         ctdlport = argv[optind];
 448         }
 449
 450         /* daemonize, if we were asked to */
 451         if (!DumpTemplateI18NStrings && running_as_daemon) {
 452                 start_daemon(pidfile);
 453         }
 454         else {
 455                 signal(SIGHUP, graceful_shutdown);
 456         }
 457
 458         webcit_calc_dirs_n_files(relh, basedir, home, webcitdir, relhome);
 459         LoadIconDir(static_icon_dir);
 460
 461         /* Tell 'em who's in da house */
 462         lprintf(1, PACKAGE_STRING "\n");
 463         lprintf(1, "Copyright (C) 1996-2009 by the Citadel development team.\n"
 464                 "This software is distributed under the terms of the "
 465                 "GNU General Public License.\n\n"
 466         );
 467
 468
 469         /* initialize the International Bright Young Thing */
 470 #ifdef ENABLE_NLS
 471         initialize_locales();
 472
 473
 474         locale = setlocale(LC_ALL, "");
 475
 476         mo = malloc(strlen(webcitdir) + 20);
 477         lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
 478         free(mo);
 479         lprintf(9, "Text domain: %s\n", textdomain("webcit"));
 480         lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
 481 #endif
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492         initialise_modules();
 493         initialize_viewdefs();
 494         initialize_axdefs();
 495
 496         InitTemplateCache();
 497         if (DumpTemplateI18NStrings) {
 498                 FILE *fd;
 499                 StrBufAppendBufPlain(I18nDump, HKEY("}\n"), 0);
 500                 if (StrLength(I18nDump) < 50) {
 501                         lprintf(1, "********************************************************************************\n");
 502                         lprintf(1, "*        No strings found in templates! are you shure they're there?           *\n");
 503                         lprintf(1, "********************************************************************************\n");
 504                         return -1;
 505                 }
 506                 fd = fopen(I18nDumpFile, "w");
 507                 if (fd == NULL) {
 508                         lprintf(1, "********************************************************************************\n");
 509                         lprintf(1, "*                  unable to open I18N dumpfile [%s]         *\n", I18nDumpFile);
 510                         lprintf(1, "********************************************************************************\n");
 511                         return -1;
 512                 }
 513                 fwrite(ChrPtr(I18nDump), 1, StrLength(I18nDump), fd);
 514                 fclose(fd);
 515                 return 0;
 516         }
 517
 518
 519         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 520         icalerror_errors_are_fatal = 0;
 521
 522         /* Use our own prefix on tzid's generated from system tzdata */
 523         icaltimezone_set_tzid_prefix("/citadel.org/");
 524
 525         /*
 526          * Set up a place to put thread-specific data.
 527          * We only need a single pointer per thread - it points to the
 528          * wcsession struct to which the thread is currently bound.
 529          */
 530         if (pthread_key_create(&MyConKey, NULL) != 0) {
 531                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 532         }
 533         InitialiseSemaphores ();
 534
 535         /*
 536          * Set up a place to put thread-specific SSL data.
 537          * We don't stick this in the wcsession struct because SSL starts
 538          * up before the session is bound, and it gets torn down between
 539          * transactions.
 540          */
 541 #ifdef HAVE_OPENSSL
 542         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 543                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 544         }
 545 #endif
 546
 547         /*
 548          * Bind the server to our favorite port.
 549          * There is no need to check for errors, because ig_tcp_server()
 550          * exits if it doesn't succeed.
 551          */
 552
 553         if (!IsEmptyStr(uds_listen_path)) {
 554                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 555                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 556         }
 557         else {
 558                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 559                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 560         }
 561
 562         lprintf(2, "Listening on socket %d\n", msock);
 563         signal(SIGPIPE, SIG_IGN);
 564
 565         pthread_mutex_init(&SessionListMutex, NULL);
 566
 567         /*
 568          * Start up the housekeeping thread
 569          */
 570         pthread_attr_init(&attr);
 571         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 572         pthread_create(&SessThread, &attr,
 573                        (void *(*)(void *)) housekeeping_loop, NULL);
 574
 575
 576         /*
 577          * If this is an HTTPS server, fire up SSL
 578          */
 579 #ifdef HAVE_OPENSSL
 580         if (is_https) {
 581                 init_ssl();
 582         }
 583 #endif
 584
 585         /* Start a few initial worker threads */
 586         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 587                 spawn_another_worker_thread();
 588         }
 589
 590         /* now the original thread becomes another worker */
 591         worker_entry();
 592         ShutDownLibCitadel ();
 593         return 0;
 594 }
 595
 596
 597 void ShutDownWebcit(void)
 598 {
 599         free_zone_directory ();
 600         icaltimezone_release_zone_tab ();
 601         icalmemory_free_ring ();
 602         ShutDownLibCitadel ();
 603         shutdown_modules ();
 604 #ifdef ENABLE_NLS
 605         ShutdownLocale();
 606 #endif
 607 #ifdef HAVE_OPENSSL
 608         if (is_https) {
 609                 shutdown_ssl();
 610         }
 611 #endif
 612 }
 613
 614 /*
 615  * Entry point for worker threads
 616  */
 617 void worker_entry(void)
 618 {
 619         int ssock;
 620         int i = 0;
 621         int fail_this_transaction = 0;
 622         int ret;
 623         struct timeval tv;
 624         fd_set readset, tempset;
 625
 626         tv.tv_sec = 0;
 627         tv.tv_usec = 10000;
 628         FD_ZERO(&readset);
 629         FD_SET(msock, &readset);
 630
 631         do {
 632                 /* Only one thread can accept at a time */
 633                 fail_this_transaction = 0;
 634                 ssock = -1;
 635                 errno = EAGAIN;
 636                 do {
 637                         ret = -1; /* just one at once should select... */
 638                         begin_critical_section(S_SELECT);
 639
 640                         FD_ZERO(&tempset);
 641                         if (msock > 0) FD_SET(msock, &tempset);
 642                         tv.tv_sec = 0;
 643                         tv.tv_usec = 10000;
 644                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
 645                         end_critical_section(S_SELECT);
 646                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
 647                         {/* EINTR and EAGAIN are thrown but not of interest. */
 648                                 lprintf(2, "accept() failed:%d %s\n",
 649                                         errno, strerror(errno));
 650                         }
 651                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
 652                         {/* Successfully selected, and still not shutting down? Accept! */
 653                                 ssock = accept(msock, NULL, 0);
 654                         }
 655
 656                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
 657
 658                 if ((msock == -1)||(time_to_die))
 659                 {/* ok, we're going down. */
 660                         int shutdown = 0;
 661
 662                         /* the first to come here will have to do the cleanup.
 663                          * make shure its realy just one.
 664                          */
 665                         begin_critical_section(S_SHUTDOWN);
 666                         if (msock == -1)
 667                         {
 668                                 msock = -2;
 669                                 shutdown = 1;
 670                         }
 671                         end_critical_section(S_SHUTDOWN);
 672                         if (shutdown == 1)
 673                         {/* we're the one to cleanup the mess. */
 674                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
 675                                 shutdown_sessions();
 676                                 lprintf(2, "master shutdown: waiting for others\n");
 677                                 sleeeeeeeeeep(1); /* wait so some others might finish... */
 678                                 lprintf(2, "master shutdown: cleaning up sessions\n");
 679                                 do_housekeeping();
 680                                 lprintf(2, "master shutdown: cleaning up libical\n");
 681
 682                                 ShutDownWebcit();
 683
 684                                 lprintf(2, "master shutdown exiting!.\n");
 685                                 exit(0);
 686                         }
 687                         break;
 688                 }
 689                 if (ssock < 0 ) continue;
 690
 691                 if (msock < 0) {
 692                         if (ssock > 0) close (ssock);
 693                         lprintf(2, "inbetween.");
 694                         pthread_exit(NULL);
 695                 } else { /* Got it? do some real work! */
 696                         /* Set the SO_REUSEADDR socket option */
 697                         i = 1;
 698                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
 699                                    &i, sizeof(i));
 700
 701                         /* If we are an HTTPS server, go crypto now. */
 702 #ifdef HAVE_OPENSSL
 703                         if (is_https) {
 704                                 if (starttls(ssock) != 0) {
 705                                         fail_this_transaction = 1;
 706                                         close(ssock);
 707                                 }
 708                         }
 709                         else
 710                         {
 711                                 int fdflags;
 712                                 fdflags = fcntl(ssock, F_GETFL);
 713                                 if (fdflags < 0)
 714                                         lprintf(1, "unable to get server socket flags! %s \n",
 715                                                 strerror(errno));
 716                                 fdflags = fdflags | O_NONBLOCK;
 717                                 if (fcntl(ssock, F_SETFD, fdflags) < 0)
 718                                         lprintf(1, "unable to set server socket nonblocking flags! %s \n",
 719                                                 strerror(errno));
 720                         }
 721 #endif
 722
 723                         if (fail_this_transaction == 0) {
 724
 725                                 /* Perform an HTTP transaction... */
 726                                 context_loop(&ssock);
 727
 728                                 /* Shut down SSL/TLS if required... */
 729 #ifdef HAVE_OPENSSL
 730                                 if (is_https) {
 731                                         endtls();
 732                                 }
 733 #endif
 734
 735                                 /* ...and close the socket. */
 736                                 if (ssock > 0)
 737                                         lingering_close(ssock);
 738                         }
 739
 740                 }
 741
 742         } while (!time_to_die);
 743
 744         lprintf (1, "bye\n");
 745         pthread_exit(NULL);
 746 }
 747
 748 /*
 749  * print log messages
 750  * logs to stderr if loglevel is lower than the verbosity set at startup
 751  *
 752  * loglevel     level of the message
 753  * format       the printf like format string
 754  * ...          the strings to put into format
 755  */
 756 int lprintf(int loglevel, const char *format, ...)
 757 {
 758         va_list ap;
 759
 760         if (loglevel <= verbosity) {
 761                 va_start(ap, format);
 762                 vfprintf(stderr, format, ap);
 763                 va_end(ap);
 764                 fflush(stderr);
 765         }
 766         return 1;
 767 }
 768
 769
 770 /*
 771  * print the actual stack frame.
 772  */
 773 void wc_backtrace(void)
 774 {
 775 #ifdef HAVE_BACKTRACE
 776         void *stack_frames[50];
 777         size_t size, i;
 778         char **strings;
 779
 780
 781         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
 782         strings = backtrace_symbols(stack_frames, size);
 783         for (i = 0; i < size; i++) {
 784                 if (strings != NULL)
 785                         lprintf(1, "%s\n", strings[i]);
 786                 else
 787                         lprintf(1, "%p\n", stack_frames[i]);
 788         }
 789         free(strings);
 790 #endif
 791 }
 792
 793
 794
 795