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  */
   9
  10 #include "webcit.h"
  11 #include "webserver.h"
  12
  13 #if HAVE_BACKTRACE
  14 #include <execinfo.h>
  15 #endif
  16 #include "modules_init.h"
  17 #ifndef HAVE_SNPRINTF
  18 int vsnprintf(char *buf, size_t max, const char *fmt, va_list argp);
  19 #endif
  20
  21 int verbosity = 9;              /* Logging level */
  22 int msock;                      /* master listening socket */
  23 int is_https = 0;               /* Nonzero if I am an HTTPS service */
  24 int follow_xff = 0;             /* Follow X-Forwarded-For: header */
  25 int home_specified = 0;         /* did the user specify a homedir? */
  26 int time_to_die = 0;            /* Nonzero if server is shutting down */
  27 extern void *context_loop(int);
  28 extern void *housekeeping_loop(void);
  29 extern pthread_mutex_t SessionListMutex;
  30 extern pthread_key_t MyConKey;
  31
  32
  33 char ctdl_key_dir[PATH_MAX]=SSL_DIR;
  34 char file_crpt_file_key[PATH_MAX]="";
  35 char file_crpt_file_csr[PATH_MAX]="";
  36 char file_crpt_file_cer[PATH_MAX]="";
  37
  38 char socket_dir[PATH_MAX];                      /* where to talk to our citadel server */
  39 static const char editor_absolut_dir[PATH_MAX]=EDITORDIR;       /* nailed to what configure gives us. */
  40 static char static_dir[PATH_MAX];               /* calculated on startup */
  41 static char static_local_dir[PATH_MAX];         /* calculated on startup */
  42 static char static_icon_dir[PATH_MAX];          /* where should we find our mime icons? */
  43 char  *static_dirs[]={                          /* needs same sort order as the web mapping */
  44         (char*)static_dir,                      /* our templates on disk */
  45         (char*)static_local_dir,                /* user provided templates disk */
  46         (char*)editor_absolut_dir,              /* the editor on disk */
  47         (char*)static_icon_dir                  /* our icons... */
  48 };
  49
  50 /*
  51  * Subdirectories from which the client may request static content
  52  *
  53  * (If you add more, remember to increment 'ndirs' below)
  54  */
  55 char *static_content_dirs[] = {
  56         "static",                     /* static templates */
  57         "static.local",               /* site local static templates */
  58         "tiny_mce"                    /* rich text editor */
  59 };
  60
  61 int ndirs=3;
  62
  63
  64 char *server_cookie = NULL;     /* our Cookie connection to the client */
  65 int http_port = PORT_NUM;       /* Port to listen on */
  66 char *ctdlhost = DEFAULT_HOST;  /* our name */
  67 char *ctdlport = DEFAULT_PORT;  /* our Port */
  68 int setup_wizard = 0;           /* should we run the setup wizard? \todo */
  69 char wizard_filename[PATH_MAX]; /* where's the setup wizard? */
  70 int running_as_daemon = 0;      /* should we deamonize on startup? */
  71
  72
  73 /*
  74  * This is a generic function to set up a master socket for listening on
  75  * a TCP port.  The server shuts down if the bind fails.
  76  *
  77  * ip_addr      IP address to bind
  78  * port_number  port number to bind
  79  * queue_len    number of incoming connections to allow in the queue
  80  */
  81 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
  82 {
  83         struct sockaddr_in sin;
  84         int s, i;
  85
  86         memset(&sin, 0, sizeof(sin));
  87         sin.sin_family = AF_INET;
  88         if (ip_addr == NULL) {
  89                 sin.sin_addr.s_addr = INADDR_ANY;
  90         } else {
  91                 sin.sin_addr.s_addr = inet_addr(ip_addr);
  92         }
  93
  94         if (sin.sin_addr.s_addr == INADDR_NONE) {
  95                 sin.sin_addr.s_addr = INADDR_ANY;
  96         }
  97
  98         if (port_number == 0) {
  99                 lprintf(1, "Cannot start: no port number specified.\n");
 100                 exit(WC_EXIT_BIND);
 101         }
 102         sin.sin_port = htons((u_short) port_number);
 103
 104         s = socket(PF_INET, SOCK_STREAM, (getprotobyname("tcp")->p_proto));
 105         if (s < 0) {
 106                 lprintf(1, "Can't create a socket: %s\n", strerror(errno));
 107                 exit(WC_EXIT_BIND);
 108         }
 109         /* Set some socket options that make sense. */
 110         i = 1;
 111         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 112
 113         fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
 114                                           there should be a preceding F_GETFL
 115                                           and a bitwise OR with the previous
 116                                           fd flags */
 117
 118         if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 119                 lprintf(1, "Can't bind: %s\n", strerror(errno));
 120                 exit(WC_EXIT_BIND);
 121         }
 122         if (listen(s, queue_len) < 0) {
 123                 lprintf(1, "Can't listen: %s\n", strerror(errno));
 124                 exit(WC_EXIT_BIND);
 125         }
 126         return (s);
 127 }
 128
 129
 130
 131 /*
 132  * Create a Unix domain socket and listen on it
 133  * sockpath - file name of the unix domain socket
 134  * queue_len - Number of incoming connections to allow in the queue
 135  */
 136 int ig_uds_server(char *sockpath, int queue_len)
 137 {
 138         struct sockaddr_un addr;
 139         int s;
 140         int i;
 141         int actual_queue_len;
 142
 143         actual_queue_len = queue_len;
 144         if (actual_queue_len < 5) actual_queue_len = 5;
 145
 146         i = unlink(sockpath);
 147         if (i != 0) if (errno != ENOENT) {
 148                 lprintf(1, "webcit: can't unlink %s: %s\n",
 149                         sockpath, strerror(errno));
 150                 exit(WC_EXIT_BIND);
 151         }
 152
 153         memset(&addr, 0, sizeof(addr));
 154         addr.sun_family = AF_UNIX;
 155         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 156
 157         s = socket(AF_UNIX, SOCK_STREAM, 0);
 158         if (s < 0) {
 159                 lprintf(1, "webcit: Can't create a socket: %s\n",
 160                         strerror(errno));
 161                 exit(WC_EXIT_BIND);
 162         }
 163
 164         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 165                 lprintf(1, "webcit: Can't bind: %s\n",
 166                         strerror(errno));
 167                 exit(WC_EXIT_BIND);
 168         }
 169
 170         if (listen(s, actual_queue_len) < 0) {
 171                 lprintf(1, "webcit: Can't listen: %s\n",
 172                         strerror(errno));
 173                 exit(WC_EXIT_BIND);
 174         }
 175
 176         chmod(sockpath, 0777);
 177         return(s);
 178 }
 179
 180
 181
 182
 183 /*
 184  * Read data from the client socket.
 185  *
 186  * sock         socket fd to read from
 187  * buf          buffer to read into
 188  * bytes        number of bytes to read
 189  * timeout      Number of seconds to wait before timing out
 190  *
 191  * Possible return values:
 192  *      1       Requested number of bytes has been read.
 193  *      0       Request timed out.
 194  *      -1      Connection is broken, or other error.
 195  */
 196 int client_read_to(int sock, char *buf, int bytes, int timeout)
 197 {
 198         int len, rlen;
 199         fd_set rfds;
 200         struct timeval tv;
 201         int retval;
 202
 203
 204 #ifdef HAVE_OPENSSL
 205         if (is_https) {
 206                 return (client_read_ssl(buf, bytes, timeout));
 207         }
 208 #endif
 209
 210         len = 0;
 211         while (len < bytes) {
 212                 FD_ZERO(&rfds);
 213                 FD_SET(sock, &rfds);
 214                 tv.tv_sec = timeout;
 215                 tv.tv_usec = 0;
 216
 217                 retval = select((sock) + 1, &rfds, NULL, NULL, &tv);
 218                 if (FD_ISSET(sock, &rfds) == 0) {
 219                         return (0);
 220                 }
 221
 222                 rlen = read(sock, &buf[len], bytes - len);
 223
 224                 if (rlen < 1) {
 225                         lprintf(2, "client_read() failed: %s\n",
 226                                 strerror(errno));
 227                         return (-1);
 228                 }
 229                 len = len + rlen;
 230         }
 231
 232 #ifdef HTTP_TRACING
 233         write(2, "\033[32m", 5);
 234         write(2, buf, bytes);
 235         write(2, "\033[30m", 5);
 236 #endif
 237         return (1);
 238 }
 239
 240 /*
 241  * \brief Begin buffering HTTP output so we can transmit it all in one write operation later.
 242  */
 243 void begin_burst(void)
 244 {
 245         if (WC->WBuf == NULL)
 246                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 247 }
 248
 249
 250 /*
 251  * \brief Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 252  */
 253 long end_burst(void)
 254 {
 255         struct wcsession *WCC = WC;
 256         const char *ptr, *eptr;
 257         long count;
 258         ssize_t res;
 259         fd_set wset;
 260         int fdflags;
 261
 262 #ifdef HAVE_ZLIB
 263         /* Perform gzip compression, if enabled and supported by client */
 264         if ((WCC->gzip_ok) && CompressBuffer(WCC->WBuf))
 265         {
 266                 hprintf("Content-encoding: gzip\r\n");
 267         }
 268 #endif  /* HAVE_ZLIB */
 269
 270         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 271
 272         ptr = ChrPtr(WCC->HBuf);
 273         count = StrLength(WCC->HBuf);
 274         eptr = ptr + count;
 275
 276 #ifdef HAVE_OPENSSL
 277         if (is_https) {
 278                 client_write_ssl(WCC->HBuf);
 279                 client_write_ssl(WCC->WBuf);
 280                 return (count);
 281         }
 282 #endif
 283
 284
 285 #ifdef HTTP_TRACING
 286
 287         write(2, "\033[34m", 5);
 288         write(2, ptr, StrLength(WCC->WBuf));
 289         write(2, "\033[30m", 5);
 290 #endif
 291         fdflags = fcntl(WC->http_sock, F_GETFL);
 292
 293         while (ptr < eptr) {
 294                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 295                         FD_ZERO(&wset);
 296                         FD_SET(WCC->http_sock, &wset);
 297                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 298                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 299                                 return -1;
 300                         }
 301                 }
 302
 303                 if ((res = write(WCC->http_sock,
 304                                  ptr,
 305                                  count)) == -1) {
 306                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 307                         return res;
 308                 }
 309                 count -= res;
 310                 ptr += res;
 311         }
 312
 313         ptr = ChrPtr(WCC->WBuf);
 314         count = StrLength(WCC->WBuf);
 315         eptr = ptr + count;
 316
 317 #ifdef HTTP_TRACING
 318
 319         write(2, "\033[34m", 5);
 320         write(2, ptr, StrLength(WCC->WBuf));
 321         write(2, "\033[30m", 5);
 322 #endif
 323
 324         while (ptr < eptr) {
 325                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 326                         FD_ZERO(&wset);
 327                         FD_SET(WCC->http_sock, &wset);
 328                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 329                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 330                                 return -1;
 331                         }
 332                 }
 333
 334                 if ((res = write(WCC->http_sock,
 335                                  ptr,
 336                                  count)) == -1) {
 337                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 338                         return res;
 339                 }
 340                 count -= res;
 341                 ptr += res;
 342         }
 343
 344         return StrLength(WCC->WBuf);
 345 }
 346
 347
 348
 349 /*
 350  * \brief Read data from the client socket with default timeout.
 351  * (This is implemented in terms of client_read_to() and could be
 352  * justifiably moved out of sysdep.c)
 353  * \param sock the socket fd to read from
 354  * \param buf the buffer to write to
 355  * \param bytes Number of bytes to read
 356  */
 357 int client_read(int sock, char *buf, int bytes)
 358 {
 359         return (client_read_to(sock, buf, bytes, SLEEPING));
 360 }
 361
 362
 363 /*
 364  * \brief Get a LF-terminated line of text from the client.
 365  * (This is implemented in terms of client_read() and could be
 366  * justifiably moved out of sysdep.c)
 367  * \param sock socket fd to get client line from
 368  * \param buf buffer to write read data to
 369  * \param bufsiz how many bytes to read
 370  * \return  number of bytes read???
 371  */
 372 int client_getln(int sock, char *buf, int bufsiz)
 373 {
 374         int i, retval;
 375
 376         /* Read one character at a time.*/
 377         for (i = 0;; i++) {
 378                 retval = client_read(sock, &buf[i], 1);
 379                 if (retval != 1 || buf[i] == '\n' || i == (bufsiz-1))
 380                         break;
 381                 if ( (!isspace(buf[i])) && (!isprint(buf[i])) ) {
 382                         /* Non printable character recieved from client */
 383                         return(-1);
 384                 }
 385         }
 386
 387         /* If we got a long line, discard characters until the newline. */
 388         if (i == (bufsiz-1))
 389                 while (buf[i] != '\n' && retval == 1)
 390                         retval = client_read(sock, &buf[i], 1);
 391
 392         /*
 393          * Strip any trailing non-printable characters.
 394          */
 395         buf[i] = 0;
 396         while ((i > 0) && (!isprint(buf[i - 1]))) {
 397                 buf[--i] = 0;
 398         }
 399         return (retval);
 400 }
 401
 402 /*
 403  * \brief Shut us down the regular way.
 404  * \param signum the signal we want to forward
 405  */
 406 pid_t current_child;
 407 void graceful_shutdown_watcher(int signum) {
 408         lprintf (1, "bye; shutting down watcher.");
 409         kill(current_child, signum);
 410         if (signum != SIGHUP)
 411                 exit(0);
 412 }
 413
 414 /*
 415  * \brief shut us down the regular way.
 416  * \param signum the signal we want to forward
 417  */
 418 pid_t current_child;
 419 void graceful_shutdown(int signum) {
 420 //      kill(current_child, signum);
 421         char wd[SIZ];
 422         FILE *FD;
 423         int fd;
 424         getcwd(wd, SIZ);
 425         lprintf (1, "bye going down gracefull.[%d][%s]\n", signum, wd);
 426         fd = msock;
 427         msock = -1;
 428         time_to_die = 1;
 429         FD=fdopen(fd, "a+");
 430         fflush (FD);
 431         fclose (FD);
 432         close(fd);
 433 }
 434
 435
 436 /*
 437  * \brief       Start running as a daemon.
 438  *
 439  * param        do_close_stdio          Only close stdio if set.
 440  */
 441
 442 /*
 443  * Start running as a daemon.
 444  */
 445 void start_daemon(char *pid_file)
 446 {
 447         int status = 0;
 448         pid_t child = 0;
 449         FILE *fp;
 450         int do_restart = 0;
 451
 452         current_child = 0;
 453
 454         /* Close stdin/stdout/stderr and replace them with /dev/null.
 455          * We don't just call close() because we don't want these fd's
 456          * to be reused for other files.
 457          */
 458         chdir("/");
 459
 460         signal(SIGHUP, SIG_IGN);
 461         signal(SIGINT, SIG_IGN);
 462         signal(SIGQUIT, SIG_IGN);
 463
 464         child = fork();
 465         if (child != 0) {
 466                 exit(0);
 467         }
 468
 469         setsid();
 470         umask(0);
 471         freopen("/dev/null", "r", stdin);
 472         freopen("/dev/null", "w", stdout);
 473         freopen("/dev/null", "w", stderr);
 474         signal(SIGTERM, graceful_shutdown_watcher);
 475         signal(SIGHUP, graceful_shutdown_watcher);
 476
 477         do {
 478                 current_child = fork();
 479
 480
 481                 if (current_child < 0) {
 482                         perror("fork");
 483                         ShutDownLibCitadel ();
 484                         exit(errno);
 485                 }
 486
 487                 else if (current_child == 0) {  // child process
 488 //                      signal(SIGTERM, graceful_shutdown);
 489                         signal(SIGHUP, graceful_shutdown);
 490
 491                         return; /* continue starting webcit. */
 492                 }
 493
 494                 else { // watcher process
 495 //                      signal(SIGTERM, SIG_IGN);
 496 //                      signal(SIGHUP, SIG_IGN);
 497                         if (pid_file) {
 498                                 fp = fopen(pid_file, "w");
 499                                 if (fp != NULL) {
 500                                         fprintf(fp, "%d\n", getpid());
 501                                         fclose(fp);
 502                                 }
 503                         }
 504                         waitpid(current_child, &status, 0);
 505                 }
 506
 507                 do_restart = 0;
 508
 509                 /* Did the main process exit with an actual exit code? */
 510                 if (WIFEXITED(status)) {
 511
 512                         /* Exit code 0 means the watcher should exit */
 513                         if (WEXITSTATUS(status) == 0) {
 514                                 do_restart = 0;
 515                         }
 516
 517                         /* Exit code 101-109 means the watcher should exit */
 518                         else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
 519                                 do_restart = 0;
 520                         }
 521
 522                         /* Any other exit code means we should restart. */
 523                         else {
 524                                 do_restart = 1;
 525                         }
 526                 }
 527
 528                 /* Any other type of termination (signals, etc.) should also restart. */
 529                 else {
 530                         do_restart = 1;
 531                 }
 532
 533         } while (do_restart);
 534
 535         if (pid_file) {
 536                 unlink(pid_file);
 537         }
 538         ShutDownLibCitadel ();
 539         exit(WEXITSTATUS(status));
 540 }
 541
 542 /*
 543  * \brief       Spawn an additional worker thread into the pool.
 544  */
 545 void spawn_another_worker_thread()
 546 {
 547         pthread_t SessThread;   /*< Thread descriptor */
 548         pthread_attr_t attr;    /*< Thread attributes */
 549         int ret;
 550
 551         lprintf(3, "Creating a new thread\n");
 552
 553         /* set attributes for the new thread */
 554         pthread_attr_init(&attr);
 555         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 556
 557         /*
 558          * Our per-thread stacks need to be bigger than the default size, otherwise
 559          * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
 560          * 64-bit Linux.
 561          */
 562         if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
 563                 lprintf(1, "pthread_attr_setstacksize: %s\n",
 564                         strerror(ret));
 565                 pthread_attr_destroy(&attr);
 566         }
 567
 568         /* now create the thread */
 569         if (pthread_create(&SessThread, &attr,
 570                            (void *(*)(void *)) worker_entry, NULL)
 571             != 0) {
 572                 lprintf(1, "Can't create thread: %s\n", strerror(errno));
 573         }
 574
 575         /* free up the attributes */
 576         pthread_attr_destroy(&attr);
 577 }
 578
 579 //#define DBG_PRINNT_HOOKS_AT_START
 580 #ifdef DBG_PRINNT_HOOKS_AT_START
 581 const char foobuf[32];
 582 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
 583 #endif
 584 void InitTemplateCache(void);
 585
 586 extern void LoadZoneFiles(void);
 587 /*
 588  * \brief Here's where it all begins.
 589  * \param argc number of commandline args
 590  * \param argv the commandline arguments
 591  */
 592 int main(int argc, char **argv)
 593 {
 594         pthread_t SessThread;   /*< Thread descriptor */
 595         pthread_attr_t attr;    /*< Thread attributes */
 596         int a, i;                       /*< General-purpose variables */
 597         char tracefile[PATH_MAX];
 598         char ip_addr[256]="0.0.0.0";
 599         char dirbuffer[PATH_MAX]="";
 600         int relh=0;
 601         int home=0;
 602         int home_specified=0;
 603         char relhome[PATH_MAX]="";
 604         char webcitdir[PATH_MAX] = DATADIR;
 605         char *pidfile = NULL;
 606         char *hdir;
 607         const char *basedir;
 608 #ifdef ENABLE_NLS
 609         char *locale = NULL;
 610         char *mo = NULL;
 611 #endif /* ENABLE_NLS */
 612         char uds_listen_path[PATH_MAX]; /*< listen on a unix domain socket? */
 613
 614         HandlerHash = NewHash(1, NULL);
 615         PreferenceHooks = NewHash(1, NULL);
 616         WirelessTemplateCache = NewHash(1, NULL);
 617         WirelessLocalTemplateCache = NewHash(1, NULL);
 618         LocalTemplateCache = NewHash(1, NULL);
 619         TemplateCache = NewHash(1, NULL);
 620         GlobalNS = NewHash(1, NULL);
 621         Iterators = NewHash(1, NULL);
 622         LoadZoneFiles();
 623
 624
 625 #ifdef DBG_PRINNT_HOOKS_AT_START
 626         dbg_PrintHash(HandlerHash, nix, NULL);
 627 #endif
 628
 629         /* Ensure that we are linked to the correct version of libcitadel */
 630         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 631                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 632                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 633                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 634                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 635                 return(1);
 636         }
 637
 638         strcpy(uds_listen_path, "");
 639
 640         /* Parse command line */
 641 #ifdef HAVE_OPENSSL
 642         while ((a = getopt(argc, argv, "h:i:p:t:x:dD:cfs")) != EOF)
 643 #else
 644         while ((a = getopt(argc, argv, "h:i:p:t:x:dD:cf")) != EOF)
 645 #endif
 646                 switch (a) {
 647                 case 'h':
 648                         hdir = strdup(optarg);
 649                         relh=hdir[0]!='/';
 650                         if (!relh) safestrncpy(webcitdir, hdir,
 651                                                                    sizeof webcitdir);
 652                         else
 653                                 safestrncpy(relhome, relhome,
 654                                                         sizeof relhome);
 655                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 656                         home_specified = 1;
 657                         home=1;
 658                         break;
 659                 case 'd':
 660                         running_as_daemon = 1;
 661                         break;
 662                 case 'D':
 663                         pidfile = strdup(optarg);
 664                         running_as_daemon = 1;
 665                         break;
 666                 case 'i':
 667                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 668                         break;
 669                 case 'p':
 670                         http_port = atoi(optarg);
 671                         if (http_port == 0) {
 672                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 673                         }
 674                         break;
 675                 case 't':
 676                         safestrncpy(tracefile, optarg, sizeof tracefile);
 677                         freopen(tracefile, "w", stdout);
 678                         freopen(tracefile, "w", stderr);
 679                         freopen(tracefile, "r", stdin);
 680                         break;
 681                 case 'x':
 682                         verbosity = atoi(optarg);
 683                         break;
 684                 case 'f':
 685                         follow_xff = 1;
 686                         break;
 687                 case 'c':
 688                         server_cookie = malloc(256);
 689                         if (server_cookie != NULL) {
 690                                 safestrncpy(server_cookie,
 691                                        "Set-cookie: wcserver=",
 692                                         256);
 693                                 if (gethostname
 694                                     (&server_cookie[strlen(server_cookie)],
 695                                      200) != 0) {
 696                                         lprintf(2, "gethostname: %s\n",
 697                                                 strerror(errno));
 698                                         free(server_cookie);
 699                                 }
 700                         }
 701                         break;
 702                 case 's':
 703                         is_https = 1;
 704                         break;
 705                 default:
 706                         fprintf(stderr, "usage: webcit "
 707                                 "[-i ip_addr] [-p http_port] "
 708                                 "[-t tracefile] [-c] [-f] "
 709                                 "[-d] "
 710 #ifdef HAVE_OPENSSL
 711                                 "[-s] "
 712 #endif
 713                                 "[remotehost [remoteport]]\n");
 714                         return 1;
 715                 }
 716
 717         if (optind < argc) {
 718                 ctdlhost = argv[optind];
 719                 if (++optind < argc)
 720                         ctdlport = argv[optind];
 721         }
 722
 723         /* daemonize, if we were asked to */
 724         if (running_as_daemon) {
 725                 start_daemon(pidfile);
 726         }
 727         else {
 728 ///             signal(SIGTERM, graceful_shutdown);
 729                 signal(SIGHUP, graceful_shutdown);
 730         }
 731
 732         /* Tell 'em who's in da house */
 733         lprintf(1, PACKAGE_STRING "\n");
 734         lprintf(1, "Copyright (C) 1996-2008 by the Citadel development team.\n"
 735                 "This software is distributed under the terms of the "
 736                 "GNU General Public License.\n\n"
 737         );
 738
 739
 740         /* initialize the International Bright Young Thing */
 741 #ifdef ENABLE_NLS
 742         initialize_locales();
 743
 744         locale = setlocale(LC_ALL, "");
 745
 746         mo = malloc(strlen(webcitdir) + 20);
 747         lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
 748         free(mo);
 749         lprintf(9, "Text domain: %s\n", textdomain("webcit"));
 750         lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
 751         preset_locale();
 752 #endif
 753
 754
 755         /* calculate all our path on a central place */
 756     /* where to keep our config */
 757
 758 #define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
 759         snprintf(SUBDIR,sizeof SUBDIR,  "%s%s%s%s%s%s%s", \
 760                          (home&!relh)?webcitdir:basedir, \
 761              ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
 762              ((basedir!=webcitdir)&(home&!relh))?"/":"", \
 763                          relhome, \
 764              (relhome[0]!='\0')?"/":"",\
 765                          dirbuffer,\
 766                          (dirbuffer[0]!='\0')?"/":"");
 767         basedir=RUNDIR;
 768         COMPUTE_DIRECTORY(socket_dir);
 769         basedir=WWWDIR "/static";
 770         COMPUTE_DIRECTORY(static_dir);
 771         basedir=WWWDIR "/static/icons";
 772         COMPUTE_DIRECTORY(static_icon_dir);
 773         basedir=WWWDIR "/static.local";
 774         COMPUTE_DIRECTORY(static_local_dir);
 775
 776         snprintf(file_crpt_file_key,
 777                  sizeof file_crpt_file_key,
 778                  "%s/citadel.key",
 779                  ctdl_key_dir);
 780         snprintf(file_crpt_file_csr,
 781                  sizeof file_crpt_file_csr,
 782                  "%s/citadel.csr",
 783                  ctdl_key_dir);
 784         snprintf(file_crpt_file_cer,
 785                  sizeof file_crpt_file_cer,
 786                  "%s/citadel.cer",
 787                  ctdl_key_dir);
 788
 789         /* we should go somewhere we can leave our coredump, if enabled... */
 790         lprintf(9, "Changing directory to %s\n", socket_dir);
 791         if (chdir(webcitdir) != 0) {
 792                 perror("chdir");
 793         }
 794         LoadIconDir(static_icon_dir);
 795         InitTemplateCache();
 796
 797         initialise_modules();
 798         initialize_viewdefs();
 799         initialize_axdefs();
 800
 801         /*
 802          * Set up a place to put thread-specific data.
 803          * We only need a single pointer per thread - it points to the
 804          * wcsession struct to which the thread is currently bound.
 805          */
 806         if (pthread_key_create(&MyConKey, NULL) != 0) {
 807                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 808         }
 809         InitialiseSemaphores ();
 810
 811         /*
 812          * Set up a place to put thread-specific SSL data.
 813          * We don't stick this in the wcsession struct because SSL starts
 814          * up before the session is bound, and it gets torn down between
 815          * transactions.
 816          */
 817 #ifdef HAVE_OPENSSL
 818         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 819                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 820         }
 821 #endif
 822
 823         /*
 824          * Bind the server to our favorite port.
 825          * There is no need to check for errors, because ig_tcp_server()
 826          * exits if it doesn't succeed.
 827          */
 828
 829         if (!IsEmptyStr(uds_listen_path)) {
 830                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 831                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 832         }
 833         else {
 834                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 835                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 836         }
 837
 838         lprintf(2, "Listening on socket %d\n", msock);
 839         signal(SIGPIPE, SIG_IGN);
 840
 841         pthread_mutex_init(&SessionListMutex, NULL);
 842
 843         /*
 844          * Start up the housekeeping thread
 845          */
 846         pthread_attr_init(&attr);
 847         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 848         pthread_create(&SessThread, &attr,
 849                        (void *(*)(void *)) housekeeping_loop, NULL);
 850
 851
 852         /*
 853          * If this is an HTTPS server, fire up SSL
 854          */
 855 #ifdef HAVE_OPENSSL
 856         if (is_https) {
 857                 init_ssl();
 858         }
 859 #endif
 860
 861         /* Start a few initial worker threads */
 862         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 863                 spawn_another_worker_thread();
 864         }
 865
 866         /* now the original thread becomes another worker */
 867         worker_entry();
 868         ShutDownLibCitadel ();
 869         DeleteHash(&HandlerHash);
 870         DeleteHash(&PreferenceHooks);
 871         return 0;
 872 }
 873
 874
 875 /*
 876  * Entry point for worker threads
 877  */
 878 void worker_entry(void)
 879 {
 880         int ssock;
 881         int i = 0;
 882         int fail_this_transaction = 0;
 883         int ret;
 884         struct timeval tv;
 885         fd_set readset, tempset;
 886
 887         tv.tv_sec = 0;
 888         tv.tv_usec = 10000;
 889         FD_ZERO(&readset);
 890         FD_SET(msock, &readset);
 891
 892         do {
 893                 /* Only one thread can accept at a time */
 894                 fail_this_transaction = 0;
 895                 ssock = -1;
 896                 errno = EAGAIN;
 897                 do {
 898                         ret = -1; /* just one at once should select... */
 899                         begin_critical_section(S_SELECT);
 900
 901                         FD_ZERO(&tempset);
 902                         if (msock > 0) FD_SET(msock, &tempset);
 903                         tv.tv_sec = 0;
 904                         tv.tv_usec = 10000;
 905                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
 906                         end_critical_section(S_SELECT);
 907                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
 908                         {// EINTR and EAGAIN are thrown but not of interest.
 909                                 lprintf(2, "accept() failed:%d %s\n",
 910                                         errno, strerror(errno));
 911                         }
 912                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
 913                         {// Successfully selected, and still not shutting down? Accept!
 914                                 ssock = accept(msock, NULL, 0);
 915                         }
 916
 917                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
 918
 919                 if ((msock == -1)||(time_to_die))
 920                 {// ok, we're going down.
 921                         int shutdown = 0;
 922
 923                         /* the first to come here will have to do the cleanup.
 924                          * make shure its realy just one.
 925                          */
 926                         begin_critical_section(S_SHUTDOWN);
 927                         if (msock == -1)
 928                         {
 929                                 msock = -2;
 930                                 shutdown = 1;
 931                         }
 932                         end_critical_section(S_SHUTDOWN);
 933                         if (shutdown == 1)
 934                         {// we're the one to cleanup the mess.
 935                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
 936                                 shutdown_sessions();
 937                                 lprintf(2, "master shutdown: waiting for others\n");
 938                                 sleeeeeeeeeep(1); // wait so some others might finish...
 939                                 lprintf(2, "master shutdown: cleaning up sessions\n");
 940                                 do_housekeeping();
 941                                 lprintf(2, "master shutdown: cleaning up libical\n");
 942                                 free_zone_directory ();
 943                                 icaltimezone_release_zone_tab ();
 944                                 icalmemory_free_ring ();
 945                                 ShutDownLibCitadel ();
 946                                 DeleteHash(&HandlerHash);
 947                                 DeleteHash(&PreferenceHooks);
 948                                 DeleteHash(&GlobalNS);
 949                                 DeleteHash(&WirelessTemplateCache);
 950                                 DeleteHash(&WirelessLocalTemplateCache);
 951                                 DeleteHash(&TemplateCache);
 952                                 DeleteHash(&LocalTemplateCache);
 953                                 DeleteHash(&Iterators);
 954 #ifdef ENABLE_NLS
 955                                 void ShutdownLocale(void);
 956 #endif
 957                                 lprintf(2, "master shutdown exiting!.\n");
 958                                 exit(0);
 959                         }
 960                         break;
 961                 }
 962                 if (ssock < 0 ) continue;
 963
 964                 if (msock < 0) {
 965                         if (ssock > 0) close (ssock);
 966                         lprintf(2, "inbetween.");
 967                         pthread_exit(NULL);
 968                 } else { // Got it? do some real work!
 969                         /* Set the SO_REUSEADDR socket option */
 970                         i = 1;
 971                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
 972                                    &i, sizeof(i));
 973
 974                         /* If we are an HTTPS server, go crypto now. */
 975 #ifdef HAVE_OPENSSL
 976                         if (is_https) {
 977                                 if (starttls(ssock) != 0) {
 978                                         fail_this_transaction = 1;
 979                                         close(ssock);
 980                                 }
 981                         }
 982 #endif
 983
 984                         if (fail_this_transaction == 0) {
 985
 986                                 /* Perform an HTTP transaction... */
 987                                 context_loop(ssock);
 988
 989                                 /* Shut down SSL/TLS if required... */
 990 #ifdef HAVE_OPENSSL
 991                                 if (is_https) {
 992                                         endtls();
 993                                 }
 994 #endif
 995
 996                                 /* ...and close the socket. */
 997                                 lingering_close(ssock);
 998                         }
 999
1000                 }
1001
1002         } while (!time_to_die);
1003
1004         lprintf (1, "bye\n");
1005         pthread_exit(NULL);
1006 }
1007
1008 /*
1009  * \brief print log messages
1010  * logs to stderr if loglevel is lower than the verbosity set at startup
1011  * \param loglevel level of the message
1012  * \param format the printf like format string
1013  * \param ... the strings to put into format
1014  */
1015 int lprintf(int loglevel, const char *format, ...)
1016 {
1017         va_list ap;
1018
1019         if (loglevel <= verbosity) {
1020                 va_start(ap, format);
1021                 vfprintf(stderr, format, ap);
1022                 va_end(ap);
1023                 fflush(stderr);
1024         }
1025         return 1;
1026 }
1027
1028
1029 /*
1030  * \brief print the actual stack frame.
1031  */
1032 void wc_backtrace(void)
1033 {
1034 #ifdef HAVE_BACKTRACE
1035         void *stack_frames[50];
1036         size_t size, i;
1037         char **strings;
1038
1039
1040         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
1041         strings = backtrace_symbols(stack_frames, size);
1042         for (i = 0; i < size; i++) {
1043                 if (strings != NULL)
1044                         lprintf(1, "%s\n", strings[i]);
1045                 else
1046                         lprintf(1, "%p\n", stack_frames[i]);
1047         }
1048         free(strings);
1049 #endif
1050 }
1051
1052 /*@}*/