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