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:cfsZ")) != 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) safestrncpy(webcitdir, hdir,
 366                                                                    sizeof webcitdir);
 367                         else
 368                                 safestrncpy(relhome, relhome,
 369                                                         sizeof relhome);
 370                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 371                         home_specified = 1;
 372                         home=1;
 373                         break;
 374                 case 'd':
 375                         running_as_daemon = 1;
 376                         break;
 377                 case 'D':
 378                         pidfile = strdup(optarg);
 379                         running_as_daemon = 1;
 380                         break;
 381                 case 'B': /* Basesize */
 382                         basesize = atoi(optarg);
 383                         if (basesize > 2)
 384                                 StartLibCitadel(basesize);
 385                         break;
 386                 case 'i':
 387                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 388                         break;
 389                 case 'p':
 390                         http_port = atoi(optarg);
 391                         if (http_port == 0) {
 392                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 393                         }
 394                         break;
 395                 case 't':
 396                         safestrncpy(tracefile, optarg, sizeof tracefile);
 397                         rvfp = freopen(tracefile, "w", stdout);
 398                         rvfp = freopen(tracefile, "w", stderr);
 399                         rvfp = freopen(tracefile, "r", stdin);
 400                         break;
 401                 case 'T':
 402                         LoadTemplates = atoi(optarg);
 403                         dbg_analyze_msg = (LoadTemplates && (1<<1)) != 0;
 404                         dbg_bactrace_template_errors = (LoadTemplates && (1<<2)) != 0;
 405                         break;
 406                 case 'Z':
 407                         DisableGzip = 1;
 408                         break;
 409                 case 'x':
 410                         verbosity = atoi(optarg);
 411                         break;
 412                 case 'f':
 413                         follow_xff = 1;
 414                         break;
 415                 case 'c':
 416                         server_cookie = malloc(256);
 417                         if (server_cookie != NULL) {
 418                                 safestrncpy(server_cookie,
 419                                        "Set-cookie: wcserver=",
 420                                         256);
 421                                 if (gethostname
 422                                     (&server_cookie[strlen(server_cookie)],
 423                                      200) != 0) {
 424                                         lprintf(2, "gethostname: %s\n",
 425                                                 strerror(errno));
 426                                         free(server_cookie);
 427                                 }
 428                         }
 429                         break;
 430                 case 's':
 431                         is_https = 1;
 432                         break;
 433                 case 'G':
 434                         DumpTemplateI18NStrings = 1;
 435                         I18nDump = NewStrBufPlain(HKEY("int templatestrings(void)\n{\n"));
 436                         I18nDumpFile = optarg;
 437                         break;
 438                 default:
 439                         fprintf(stderr, "usage: webcit "
 440                                 "[-i ip_addr] [-p http_port] "
 441                                 "[-t tracefile] [-c] [-f] "
 442                                 "[-T Templatedebuglevel] "
 443                                 "[-d] [-Z] [-G i18ndumpfile] "
 444 #ifdef HAVE_OPENSSL
 445                                 "[-s] "
 446 #endif
 447                                 "[remotehost [remoteport]]\n");
 448                         return 1;
 449                 }
 450
 451         if (optind < argc) {
 452                 ctdlhost = argv[optind];
 453                 if (++optind < argc)
 454                         ctdlport = argv[optind];
 455         }
 456
 457         /* daemonize, if we were asked to */
 458         if (!DumpTemplateI18NStrings && running_as_daemon) {
 459                 start_daemon(pidfile);
 460         }
 461         else {
 462                 signal(SIGHUP, graceful_shutdown);
 463         }
 464
 465         webcit_calc_dirs_n_files(relh, basedir, home, webcitdir, relhome);
 466         LoadIconDir(static_icon_dir);
 467
 468         /* Tell 'em who's in da house */
 469         lprintf(1, PACKAGE_STRING "\n");
 470         lprintf(1, "Copyright (C) 1996-2009 by the Citadel development team.\n"
 471                 "This software is distributed under the terms of the "
 472                 "GNU General Public License.\n\n"
 473         );
 474
 475
 476         /* initialize the International Bright Young Thing */
 477
 478         initialise_modules();
 479         initialize_viewdefs();
 480         initialize_axdefs();
 481
 482         InitTemplateCache();
 483         if (DumpTemplateI18NStrings) {
 484                 FILE *fd;
 485                 StrBufAppendBufPlain(I18nDump, HKEY("}\n"), 0);
 486                 if (StrLength(I18nDump) < 50) {
 487                         lprintf(1, "********************************************************************************\n");
 488                         lprintf(1, "*        No strings found in templates! are you shure they're there?           *\n");
 489                         lprintf(1, "********************************************************************************\n");
 490                         return -1;
 491                 }
 492                 fd = fopen(I18nDumpFile, "w");
 493                 if (fd == NULL) {
 494                         lprintf(1, "********************************************************************************\n");
 495                         lprintf(1, "*                  unable to open I18N dumpfile [%s]         *\n", I18nDumpFile);
 496                         lprintf(1, "********************************************************************************\n");
 497                         return -1;
 498                 }
 499                 fwrite(ChrPtr(I18nDump), 1, StrLength(I18nDump), fd);
 500                 fclose(fd);
 501                 return 0;
 502         }
 503
 504
 505         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 506         icalerror_errors_are_fatal = 0;
 507
 508         /* Use our own prefix on tzid's generated from system tzdata */
 509         icaltimezone_set_tzid_prefix("/citadel.org/");
 510
 511         /*
 512          * Set up a place to put thread-specific data.
 513          * We only need a single pointer per thread - it points to the
 514          * wcsession struct to which the thread is currently bound.
 515          */
 516         if (pthread_key_create(&MyConKey, NULL) != 0) {
 517                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 518         }
 519         InitialiseSemaphores ();
 520
 521         /*
 522          * Set up a place to put thread-specific SSL data.
 523          * We don't stick this in the wcsession struct because SSL starts
 524          * up before the session is bound, and it gets torn down between
 525          * transactions.
 526          */
 527 #ifdef HAVE_OPENSSL
 528         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 529                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 530         }
 531 #endif
 532
 533         /*
 534          * Bind the server to our favorite port.
 535          * There is no need to check for errors, because ig_tcp_server()
 536          * exits if it doesn't succeed.
 537          */
 538
 539         if (!IsEmptyStr(uds_listen_path)) {
 540                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 541                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 542         }
 543         else {
 544                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 545                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 546         }
 547
 548         lprintf(2, "Listening on socket %d\n", msock);
 549         signal(SIGPIPE, SIG_IGN);
 550
 551         pthread_mutex_init(&SessionListMutex, NULL);
 552
 553         /*
 554          * Start up the housekeeping thread
 555          */
 556         pthread_attr_init(&attr);
 557         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 558         pthread_create(&SessThread, &attr,
 559                        (void *(*)(void *)) housekeeping_loop, NULL);
 560
 561
 562         /*
 563          * If this is an HTTPS server, fire up SSL
 564          */
 565 #ifdef HAVE_OPENSSL
 566         if (is_https) {
 567                 init_ssl();
 568         }
 569 #endif
 570
 571         /* Start a few initial worker threads */
 572         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 573                 spawn_another_worker_thread();
 574         }
 575
 576         /* now the original thread becomes another worker */
 577         worker_entry();
 578         ShutDownLibCitadel ();
 579         return 0;
 580 }
 581
 582
 583 void ShutDownWebcit(void)
 584 {
 585         free_zone_directory ();
 586         icaltimezone_release_zone_tab ();
 587         icalmemory_free_ring ();
 588         ShutDownLibCitadel ();
 589         shutdown_modules ();
 590 #ifdef HAVE_OPENSSL
 591         if (is_https) {
 592                 shutdown_ssl();
 593         }
 594 #endif
 595 }
 596
 597 /*
 598  * Entry point for worker threads
 599  */
 600 void worker_entry(void)
 601 {
 602         int ssock;
 603         int i = 0;
 604         int fail_this_transaction = 0;
 605         int ret;
 606         struct timeval tv;
 607         fd_set readset, tempset;
 608         ParsedHttpHdrs Hdr;
 609
 610         memset(&Hdr, 0, sizeof(ParsedHttpHdrs));
 611         Hdr.HR.eReqType = eGET;
 612         http_new_modules(&Hdr);
 613         tv.tv_sec = 0;
 614         tv.tv_usec = 10000;
 615         FD_ZERO(&readset);
 616         FD_SET(msock, &readset);
 617
 618         do {
 619                 /* Only one thread can accept at a time */
 620                 fail_this_transaction = 0;
 621                 ssock = -1;
 622                 errno = EAGAIN;
 623                 do {
 624                         ret = -1; /* just one at once should select... */
 625                         begin_critical_section(S_SELECT);
 626
 627                         FD_ZERO(&tempset);
 628                         if (msock > 0) FD_SET(msock, &tempset);
 629                         tv.tv_sec = 0;
 630                         tv.tv_usec = 10000;
 631                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
 632                         end_critical_section(S_SELECT);
 633                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
 634                         {/* EINTR and EAGAIN are thrown but not of interest. */
 635                                 lprintf(2, "accept() failed:%d %s\n",
 636                                         errno, strerror(errno));
 637                         }
 638                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
 639                         {/* Successfully selected, and still not shutting down? Accept! */
 640                                 ssock = accept(msock, NULL, 0);
 641                         }
 642
 643                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
 644
 645                 if ((msock == -1)||(time_to_die))
 646                 {/* ok, we're going down. */
 647                         int shutdown = 0;
 648
 649                         /* the first to come here will have to do the cleanup.
 650                          * make shure its realy just one.
 651                          */
 652                         begin_critical_section(S_SHUTDOWN);
 653                         if (msock == -1)
 654                         {
 655                                 msock = -2;
 656                                 shutdown = 1;
 657                         }
 658                         end_critical_section(S_SHUTDOWN);
 659                         if (shutdown == 1)
 660                         {/* we're the one to cleanup the mess. */
 661                                 http_destroy_modules(&Hdr);
 662                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
 663                                 shutdown_sessions();
 664                                 lprintf(2, "master shutdown: waiting for others\n");
 665                                 sleeeeeeeeeep(1); /* wait so some others might finish... */
 666                                 lprintf(2, "master shutdown: cleaning up sessions\n");
 667                                 do_housekeeping();
 668                                 lprintf(2, "master shutdown: cleaning up libical\n");
 669
 670                                 ShutDownWebcit();
 671
 672                                 lprintf(2, "master shutdown exiting!.\n");
 673                                 exit(0);
 674                         }
 675                         break;
 676                 }
 677                 if (ssock < 0 ) continue;
 678
 679                 if (msock < 0) {
 680                         if (ssock > 0) close (ssock);
 681                         lprintf(2, "inbetween.");
 682                         pthread_exit(NULL);
 683                 } else { /* Got it? do some real work! */
 684                         /* Set the SO_REUSEADDR socket option */
 685                         i = 1;
 686                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
 687                                    &i, sizeof(i));
 688
 689                         /* If we are an HTTPS server, go crypto now. */
 690 #ifdef HAVE_OPENSSL
 691                         if (is_https) {
 692                                 if (starttls(ssock) != 0) {
 693                                         fail_this_transaction = 1;
 694                                         close(ssock);
 695                                 }
 696                         }
 697                         else
 698                         {
 699                                 int fdflags;
 700                                 fdflags = fcntl(ssock, F_GETFL);
 701                                 if (fdflags < 0)
 702                                         lprintf(1, "unable to get server socket flags! %s \n",
 703                                                 strerror(errno));
 704                                 fdflags = fdflags | O_NONBLOCK;
 705                                 if (fcntl(ssock, F_SETFD, fdflags) < 0)
 706                                         lprintf(1, "unable to set server socket nonblocking flags! %s \n",
 707                                                 strerror(errno));
 708                         }
 709 #endif
 710
 711                         if (fail_this_transaction == 0) {
 712                                 Hdr.http_sock = ssock;
 713
 714                                 /* Perform an HTTP transaction... */
 715                                 context_loop(&Hdr);
 716
 717                                 /* Shut down SSL/TLS if required... */
 718 #ifdef HAVE_OPENSSL
 719                                 if (is_https) {
 720                                         endtls();
 721                                 }
 722 #endif
 723
 724                                 /* ...and close the socket. */
 725                                 if (Hdr.http_sock > 0)
 726                                         lingering_close(ssock);
 727                                 http_detach_modules(&Hdr);
 728
 729                         }
 730
 731                 }
 732
 733         } while (!time_to_die);
 734
 735         http_destroy_modules(&Hdr);
 736         lprintf (1, "bye\n");
 737         pthread_exit(NULL);
 738 }
 739
 740 /*
 741  * print log messages
 742  * logs to stderr if loglevel is lower than the verbosity set at startup
 743  *
 744  * loglevel     level of the message
 745  * format       the printf like format string
 746  * ...          the strings to put into format
 747  */
 748 int lprintf(int loglevel, const char *format, ...)
 749 {
 750         va_list ap;
 751
 752         if (loglevel <= verbosity) {
 753                 va_start(ap, format);
 754                 vfprintf(stderr, format, ap);
 755                 va_end(ap);
 756                 fflush(stderr);
 757         }
 758         return 1;
 759 }
 760
 761
 762 /*
 763  * print the actual stack frame.
 764  */
 765 void wc_backtrace(void)
 766 {
 767 #ifdef HAVE_BACKTRACE
 768         void *stack_frames[50];
 769         size_t size, i;
 770         char **strings;
 771
 772
 773         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
 774         strings = backtrace_symbols(stack_frames, size);
 775         for (i = 0; i < size; i++) {
 776                 if (strings != NULL)
 777                         lprintf(1, "%s\n", strings[i]);
 778                 else
 779                         lprintf(1, "%p\n", stack_frames[i]);
 780         }
 781         free(strings);
 782 #endif
 783 }
 784
 785
 786
 787