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(ptr, StrLength(WCC->HBuf));
 279                 return (count);
 280         }
 281 #endif
 282
 283
 284 #ifdef HTTP_TRACING
 285
 286         write(2, "\033[34m", 5);
 287         write(2, ptr, StrLength(WCC->WBuf));
 288         write(2, "\033[30m", 5);
 289 #endif
 290         fdflags = fcntl(WC->http_sock, F_GETFL);
 291
 292         while (ptr < eptr) {
 293                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 294                         FD_ZERO(&wset);
 295                         FD_SET(WCC->http_sock, &wset);
 296                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 297                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 298                                 return -1;
 299                         }
 300                 }
 301
 302                 if ((res = write(WCC->http_sock,
 303                                  ptr,
 304                                  count)) == -1) {
 305                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 306                         return res;
 307                 }
 308                 count -= res;
 309                 ptr += res;
 310         }
 311
 312         ptr = ChrPtr(WCC->WBuf);
 313         count = StrLength(WCC->WBuf);
 314         eptr = ptr + count;
 315
 316 #ifdef HAVE_OPENSSL
 317         if (is_https) {
 318                 client_write_ssl(ptr, StrLength(WCC->HBuf));
 319                 return (count);
 320         }
 321 #endif
 322
 323 #ifdef HTTP_TRACING
 324
 325         write(2, "\033[34m", 5);
 326         write(2, ptr, StrLength(WCC->WBuf));
 327         write(2, "\033[30m", 5);
 328 #endif
 329
 330         while (ptr < eptr) {
 331                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 332                         FD_ZERO(&wset);
 333                         FD_SET(WCC->http_sock, &wset);
 334                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 335                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 336                                 return -1;
 337                         }
 338                 }
 339
 340                 if ((res = write(WCC->http_sock,
 341                                  ptr,
 342                                  count)) == -1) {
 343                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 344                         return res;
 345                 }
 346                 count -= res;
 347                 ptr += res;
 348         }
 349
 350         return StrLength(WCC->WBuf);
 351 }
 352
 353
 354
 355 /*
 356  * \brief Read data from the client socket with default timeout.
 357  * (This is implemented in terms of client_read_to() and could be
 358  * justifiably moved out of sysdep.c)
 359  * \param sock the socket fd to read from
 360  * \param buf the buffer to write to
 361  * \param bytes Number of bytes to read
 362  */
 363 int client_read(int sock, char *buf, int bytes)
 364 {
 365         return (client_read_to(sock, buf, bytes, SLEEPING));
 366 }
 367
 368
 369 /*
 370  * \brief Get a LF-terminated line of text from the client.
 371  * (This is implemented in terms of client_read() and could be
 372  * justifiably moved out of sysdep.c)
 373  * \param sock socket fd to get client line from
 374  * \param buf buffer to write read data to
 375  * \param bufsiz how many bytes to read
 376  * \return  number of bytes read???
 377  */
 378 int client_getln(int sock, char *buf, int bufsiz)
 379 {
 380         int i, retval;
 381
 382         /* Read one character at a time.*/
 383         for (i = 0;; i++) {
 384                 retval = client_read(sock, &buf[i], 1);
 385                 if (retval != 1 || buf[i] == '\n' || i == (bufsiz-1))
 386                         break;
 387                 if ( (!isspace(buf[i])) && (!isprint(buf[i])) ) {
 388                         /* Non printable character recieved from client */
 389                         return(-1);
 390                 }
 391         }
 392
 393         /* If we got a long line, discard characters until the newline. */
 394         if (i == (bufsiz-1))
 395                 while (buf[i] != '\n' && retval == 1)
 396                         retval = client_read(sock, &buf[i], 1);
 397
 398         /*
 399          * Strip any trailing non-printable characters.
 400          */
 401         buf[i] = 0;
 402         while ((i > 0) && (!isprint(buf[i - 1]))) {
 403                 buf[--i] = 0;
 404         }
 405         return (retval);
 406 }
 407
 408 /*
 409  * \brief Shut us down the regular way.
 410  * \param signum the signal we want to forward
 411  */
 412 pid_t current_child;
 413 void graceful_shutdown_watcher(int signum) {
 414         lprintf (1, "bye; shutting down watcher.");
 415         kill(current_child, signum);
 416         if (signum != SIGHUP)
 417                 exit(0);
 418 }
 419
 420 /*
 421  * \brief shut us down the regular way.
 422  * \param signum the signal we want to forward
 423  */
 424 pid_t current_child;
 425 void graceful_shutdown(int signum) {
 426 //      kill(current_child, signum);
 427         char wd[SIZ];
 428         FILE *FD;
 429         int fd;
 430         getcwd(wd, SIZ);
 431         lprintf (1, "bye going down gracefull.[%d][%s]\n", signum, wd);
 432         fd = msock;
 433         msock = -1;
 434         time_to_die = 1;
 435         FD=fdopen(fd, "a+");
 436         fflush (FD);
 437         fclose (FD);
 438         close(fd);
 439 }
 440
 441
 442 /*
 443  * \brief       Start running as a daemon.
 444  *
 445  * param        do_close_stdio          Only close stdio if set.
 446  */
 447
 448 /*
 449  * Start running as a daemon.
 450  */
 451 void start_daemon(char *pid_file)
 452 {
 453         int status = 0;
 454         pid_t child = 0;
 455         FILE *fp;
 456         int do_restart = 0;
 457
 458         current_child = 0;
 459
 460         /* Close stdin/stdout/stderr and replace them with /dev/null.
 461          * We don't just call close() because we don't want these fd's
 462          * to be reused for other files.
 463          */
 464         chdir("/");
 465
 466         signal(SIGHUP, SIG_IGN);
 467         signal(SIGINT, SIG_IGN);
 468         signal(SIGQUIT, SIG_IGN);
 469
 470         child = fork();
 471         if (child != 0) {
 472                 exit(0);
 473         }
 474
 475         setsid();
 476         umask(0);
 477         freopen("/dev/null", "r", stdin);
 478         freopen("/dev/null", "w", stdout);
 479         freopen("/dev/null", "w", stderr);
 480         signal(SIGTERM, graceful_shutdown_watcher);
 481         signal(SIGHUP, graceful_shutdown_watcher);
 482
 483         do {
 484                 current_child = fork();
 485
 486
 487                 if (current_child < 0) {
 488                         perror("fork");
 489                         ShutDownLibCitadel ();
 490                         exit(errno);
 491                 }
 492
 493                 else if (current_child == 0) {  // child process
 494 //                      signal(SIGTERM, graceful_shutdown);
 495                         signal(SIGHUP, graceful_shutdown);
 496
 497                         return; /* continue starting webcit. */
 498                 }
 499
 500                 else { // watcher process
 501 //                      signal(SIGTERM, SIG_IGN);
 502 //                      signal(SIGHUP, SIG_IGN);
 503                         if (pid_file) {
 504                                 fp = fopen(pid_file, "w");
 505                                 if (fp != NULL) {
 506                                         fprintf(fp, "%d\n", getpid());
 507                                         fclose(fp);
 508                                 }
 509                         }
 510                         waitpid(current_child, &status, 0);
 511                 }
 512
 513                 do_restart = 0;
 514
 515                 /* Did the main process exit with an actual exit code? */
 516                 if (WIFEXITED(status)) {
 517
 518                         /* Exit code 0 means the watcher should exit */
 519                         if (WEXITSTATUS(status) == 0) {
 520                                 do_restart = 0;
 521                         }
 522
 523                         /* Exit code 101-109 means the watcher should exit */
 524                         else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
 525                                 do_restart = 0;
 526                         }
 527
 528                         /* Any other exit code means we should restart. */
 529                         else {
 530                                 do_restart = 1;
 531                         }
 532                 }
 533
 534                 /* Any other type of termination (signals, etc.) should also restart. */
 535                 else {
 536                         do_restart = 1;
 537                 }
 538
 539         } while (do_restart);
 540
 541         if (pid_file) {
 542                 unlink(pid_file);
 543         }
 544         ShutDownLibCitadel ();
 545         exit(WEXITSTATUS(status));
 546 }
 547
 548 /*
 549  * \brief       Spawn an additional worker thread into the pool.
 550  */
 551 void spawn_another_worker_thread()
 552 {
 553         pthread_t SessThread;   /*< Thread descriptor */
 554         pthread_attr_t attr;    /*< Thread attributes */
 555         int ret;
 556
 557         lprintf(3, "Creating a new thread\n");
 558
 559         /* set attributes for the new thread */
 560         pthread_attr_init(&attr);
 561         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 562
 563         /*
 564          * Our per-thread stacks need to be bigger than the default size, otherwise
 565          * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
 566          * 64-bit Linux.
 567          */
 568         if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
 569                 lprintf(1, "pthread_attr_setstacksize: %s\n",
 570                         strerror(ret));
 571                 pthread_attr_destroy(&attr);
 572         }
 573
 574         /* now create the thread */
 575         if (pthread_create(&SessThread, &attr,
 576                            (void *(*)(void *)) worker_entry, NULL)
 577             != 0) {
 578                 lprintf(1, "Can't create thread: %s\n", strerror(errno));
 579         }
 580
 581         /* free up the attributes */
 582         pthread_attr_destroy(&attr);
 583 }
 584
 585 //#define DBG_PRINNT_HOOKS_AT_START
 586 #ifdef DBG_PRINNT_HOOKS_AT_START
 587 const char foobuf[32];
 588 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
 589 #endif
 590 void InitTemplateCache(void);
 591
 592 /*
 593  * \brief Here's where it all begins.
 594  * \param argc number of commandline args
 595  * \param argv the commandline arguments
 596  */
 597 int main(int argc, char **argv)
 598 {
 599         pthread_t SessThread;   /*< Thread descriptor */
 600         pthread_attr_t attr;    /*< Thread attributes */
 601         int a, i;                       /*< General-purpose variables */
 602         char tracefile[PATH_MAX];
 603         char ip_addr[256]="0.0.0.0";
 604         char dirbuffer[PATH_MAX]="";
 605         int relh=0;
 606         int home=0;
 607         int home_specified=0;
 608         char relhome[PATH_MAX]="";
 609         char webcitdir[PATH_MAX] = DATADIR;
 610         char *pidfile = NULL;
 611         char *hdir;
 612         const char *basedir;
 613 #ifdef ENABLE_NLS
 614         char *locale = NULL;
 615         char *mo = NULL;
 616 #endif /* ENABLE_NLS */
 617         char uds_listen_path[PATH_MAX]; /*< listen on a unix domain socket? */
 618
 619         HandlerHash = NewHash(1, NULL);
 620         PreferenceHooks = NewHash(1, NULL);
 621         WirelessTemplateCache = NewHash(1, NULL);
 622         WirelessLocalTemplateCache = NewHash(1, NULL);
 623         TemplateCache = NewHash(1, NULL);
 624         LocalTemplateCache = NewHash(1, NULL);
 625         InitTemplateCache();
 626
 627         initialise_modules();
 628
 629 #ifdef DBG_PRINNT_HOOKS_AT_START
 630         dbg_PrintHash(HandlerHash, nix, NULL);
 631 #endif
 632
 633         /* Ensure that we are linked to the correct version of libcitadel */
 634         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 635                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 636                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 637                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 638                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 639                 return(1);
 640         }
 641
 642         strcpy(uds_listen_path, "");
 643
 644         /* Parse command line */
 645 #ifdef HAVE_OPENSSL
 646         while ((a = getopt(argc, argv, "h:i:p:t:x:dD:cfs")) != EOF)
 647 #else
 648         while ((a = getopt(argc, argv, "h:i:p:t:x:dD:cf")) != EOF)
 649 #endif
 650                 switch (a) {
 651                 case 'h':
 652                         hdir = strdup(optarg);
 653                         relh=hdir[0]!='/';
 654                         if (!relh) safestrncpy(webcitdir, hdir,
 655                                                                    sizeof webcitdir);
 656                         else
 657                                 safestrncpy(relhome, relhome,
 658                                                         sizeof relhome);
 659                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 660                         home_specified = 1;
 661                         home=1;
 662                         break;
 663                 case 'd':
 664                         running_as_daemon = 1;
 665                         break;
 666                 case 'D':
 667                         pidfile = strdup(optarg);
 668                         running_as_daemon = 1;
 669                         break;
 670                 case 'i':
 671                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 672                         break;
 673                 case 'p':
 674                         http_port = atoi(optarg);
 675                         if (http_port == 0) {
 676                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 677                         }
 678                         break;
 679                 case 't':
 680                         safestrncpy(tracefile, optarg, sizeof tracefile);
 681                         freopen(tracefile, "w", stdout);
 682                         freopen(tracefile, "w", stderr);
 683                         freopen(tracefile, "r", stdin);
 684                         break;
 685                 case 'x':
 686                         verbosity = atoi(optarg);
 687                         break;
 688                 case 'f':
 689                         follow_xff = 1;
 690                         break;
 691                 case 'c':
 692                         server_cookie = malloc(256);
 693                         if (server_cookie != NULL) {
 694                                 safestrncpy(server_cookie,
 695                                        "Set-cookie: wcserver=",
 696                                         256);
 697                                 if (gethostname
 698                                     (&server_cookie[strlen(server_cookie)],
 699                                      200) != 0) {
 700                                         lprintf(2, "gethostname: %s\n",
 701                                                 strerror(errno));
 702                                         free(server_cookie);
 703                                 }
 704                         }
 705                         break;
 706                 case 's':
 707                         is_https = 1;
 708                         break;
 709                 default:
 710                         fprintf(stderr, "usage: webcit "
 711                                 "[-i ip_addr] [-p http_port] "
 712                                 "[-t tracefile] [-c] [-f] "
 713                                 "[-d] "
 714 #ifdef HAVE_OPENSSL
 715                                 "[-s] "
 716 #endif
 717                                 "[remotehost [remoteport]]\n");
 718                         return 1;
 719                 }
 720
 721         if (optind < argc) {
 722                 ctdlhost = argv[optind];
 723                 if (++optind < argc)
 724                         ctdlport = argv[optind];
 725         }
 726
 727         /* daemonize, if we were asked to */
 728         if (running_as_daemon) {
 729                 start_daemon(pidfile);
 730         }
 731         else {
 732 ///             signal(SIGTERM, graceful_shutdown);
 733                 signal(SIGHUP, graceful_shutdown);
 734         }
 735
 736         /* Tell 'em who's in da house */
 737         lprintf(1, PACKAGE_STRING "\n");
 738         lprintf(1, "Copyright (C) 1996-2008 by the Citadel development team.\n"
 739                 "This software is distributed under the terms of the "
 740                 "GNU General Public License.\n\n"
 741         );
 742
 743
 744         /* initialize the International Bright Young Thing */
 745 #ifdef ENABLE_NLS
 746         initialize_locales();
 747
 748         locale = setlocale(LC_ALL, "");
 749
 750         mo = malloc(strlen(webcitdir) + 20);
 751         lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
 752         free(mo);
 753         lprintf(9, "Text domain: %s\n", textdomain("webcit"));
 754         lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
 755         preset_locale();
 756 #endif
 757
 758
 759         /* calculate all our path on a central place */
 760     /* where to keep our config */
 761
 762 #define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
 763         snprintf(SUBDIR,sizeof SUBDIR,  "%s%s%s%s%s%s%s", \
 764                          (home&!relh)?webcitdir:basedir, \
 765              ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
 766              ((basedir!=webcitdir)&(home&!relh))?"/":"", \
 767                          relhome, \
 768              (relhome[0]!='\0')?"/":"",\
 769                          dirbuffer,\
 770                          (dirbuffer[0]!='\0')?"/":"");
 771         basedir=RUNDIR;
 772         COMPUTE_DIRECTORY(socket_dir);
 773         basedir=WWWDIR "/static";
 774         COMPUTE_DIRECTORY(static_dir);
 775         basedir=WWWDIR "/static/icons";
 776         COMPUTE_DIRECTORY(static_icon_dir);
 777         basedir=WWWDIR "/static.local";
 778         COMPUTE_DIRECTORY(static_local_dir);
 779
 780         snprintf(file_crpt_file_key,
 781                  sizeof file_crpt_file_key,
 782                  "%s/citadel.key",
 783                  ctdl_key_dir);
 784         snprintf(file_crpt_file_csr,
 785                  sizeof file_crpt_file_csr,
 786                  "%s/citadel.csr",
 787                  ctdl_key_dir);
 788         snprintf(file_crpt_file_cer,
 789                  sizeof file_crpt_file_cer,
 790                  "%s/citadel.cer",
 791                  ctdl_key_dir);
 792
 793         /* we should go somewhere we can leave our coredump, if enabled... */
 794         lprintf(9, "Changing directory to %s\n", socket_dir);
 795         if (chdir(webcitdir) != 0) {
 796                 perror("chdir");
 797         }
 798         LoadIconDir(static_icon_dir);
 799         initialize_viewdefs();
 800         initialize_axdefs();
 801
 802         /*
 803          * Set up a place to put thread-specific data.
 804          * We only need a single pointer per thread - it points to the
 805          * wcsession struct to which the thread is currently bound.
 806          */
 807         if (pthread_key_create(&MyConKey, NULL) != 0) {
 808                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 809         }
 810         InitialiseSemaphores ();
 811
 812         /*
 813          * Set up a place to put thread-specific SSL data.
 814          * We don't stick this in the wcsession struct because SSL starts
 815          * up before the session is bound, and it gets torn down between
 816          * transactions.
 817          */
 818 #ifdef HAVE_OPENSSL
 819         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 820                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 821         }
 822 #endif
 823
 824         /*
 825          * Bind the server to our favorite port.
 826          * There is no need to check for errors, because ig_tcp_server()
 827          * exits if it doesn't succeed.
 828          */
 829
 830         if (!IsEmptyStr(uds_listen_path)) {
 831                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 832                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 833         }
 834         else {
 835                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 836                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 837         }
 838
 839         lprintf(2, "Listening on socket %d\n", msock);
 840         signal(SIGPIPE, SIG_IGN);
 841
 842         pthread_mutex_init(&SessionListMutex, NULL);
 843
 844         /*
 845          * Start up the housekeeping thread
 846          */
 847         pthread_attr_init(&attr);
 848         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 849         pthread_create(&SessThread, &attr,
 850                        (void *(*)(void *)) housekeeping_loop, NULL);
 851
 852
 853         /*
 854          * If this is an HTTPS server, fire up SSL
 855          */
 856 #ifdef HAVE_OPENSSL
 857         if (is_https) {
 858                 init_ssl();
 859         }
 860 #endif
 861
 862         /* Start a few initial worker threads */
 863         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 864                 spawn_another_worker_thread();
 865         }
 866
 867         /* now the original thread becomes another worker */
 868         worker_entry();
 869         ShutDownLibCitadel ();
 870         DeleteHash(&HandlerHash);
 871         DeleteHash(&PreferenceHooks);
 872         return 0;
 873 }
 874
 875
 876 /*
 877  * Entry point for worker threads
 878  */
 879 void worker_entry(void)
 880 {
 881         int ssock;
 882         int i = 0;
 883         int fail_this_transaction = 0;
 884         int ret;
 885         struct timeval tv;
 886         fd_set readset, tempset;
 887
 888         tv.tv_sec = 0;
 889         tv.tv_usec = 10000;
 890         FD_ZERO(&readset);
 891         FD_SET(msock, &readset);
 892
 893         do {
 894                 /* Only one thread can accept at a time */
 895                 fail_this_transaction = 0;
 896                 ssock = -1;
 897                 errno = EAGAIN;
 898                 do {
 899                         ret = -1; /* just one at once should select... */
 900                         begin_critical_section(S_SELECT);
 901
 902                         FD_ZERO(&tempset);
 903                         if (msock > 0) FD_SET(msock, &tempset);
 904                         tv.tv_sec = 0;
 905                         tv.tv_usec = 10000;
 906                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
 907                         end_critical_section(S_SELECT);
 908                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
 909                         {// EINTR and EAGAIN are thrown but not of interest.
 910                                 lprintf(2, "accept() failed:%d %s\n",
 911                                         errno, strerror(errno));
 912                         }
 913                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
 914                         {// Successfully selected, and still not shutting down? Accept!
 915                                 ssock = accept(msock, NULL, 0);
 916                         }
 917
 918                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
 919
 920                 if ((msock == -1)||(time_to_die))
 921                 {// ok, we're going down.
 922                         int shutdown = 0;
 923
 924                         /* the first to come here will have to do the cleanup.
 925                          * make shure its realy just one.
 926                          */
 927                         begin_critical_section(S_SHUTDOWN);
 928                         if (msock == -1)
 929                         {
 930                                 msock = -2;
 931                                 shutdown = 1;
 932                         }
 933                         end_critical_section(S_SHUTDOWN);
 934                         if (shutdown == 1)
 935                         {// we're the one to cleanup the mess.
 936                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
 937                                 shutdown_sessions();
 938                                 lprintf(2, "master shutdown: waiting for others\n");
 939                                 sleeeeeeeeeep(1); // wait so some others might finish...
 940                                 lprintf(2, "master shutdown: cleaning up sessions\n");
 941                                 do_housekeeping();
 942                                 lprintf(2, "master shutdown: cleaning up libical\n");
 943                                 free_zone_directory ();
 944                                 icaltimezone_release_zone_tab ();
 945                                 icalmemory_free_ring ();
 946                                 ShutDownLibCitadel ();
 947                                 DeleteHash(&HandlerHash);
 948                                 DeleteHash(&PreferenceHooks);
 949 #ifdef ENABLE_NLS
 950                                 void ShutdownLocale(void);
 951 #endif
 952                                 lprintf(2, "master shutdown exiting!.\n");
 953                                 exit(0);
 954                         }
 955                         break;
 956                 }
 957                 if (ssock < 0 ) continue;
 958
 959                 if (msock < 0) {
 960                         if (ssock > 0) close (ssock);
 961                         lprintf(2, "inbetween.");
 962                         pthread_exit(NULL);
 963                 } else { // Got it? do some real work!
 964                         /* Set the SO_REUSEADDR socket option */
 965                         i = 1;
 966                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
 967                                    &i, sizeof(i));
 968
 969                         /* If we are an HTTPS server, go crypto now. */
 970 #ifdef HAVE_OPENSSL
 971                         if (is_https) {
 972                                 if (starttls(ssock) != 0) {
 973                                         fail_this_transaction = 1;
 974                                         close(ssock);
 975                                 }
 976                         }
 977 #endif
 978
 979                         if (fail_this_transaction == 0) {
 980
 981                                 /* Perform an HTTP transaction... */
 982                                 context_loop(ssock);
 983
 984                                 /* Shut down SSL/TLS if required... */
 985 #ifdef HAVE_OPENSSL
 986                                 if (is_https) {
 987                                         endtls();
 988                                 }
 989 #endif
 990
 991                                 /* ...and close the socket. */
 992                                 lingering_close(ssock);
 993                         }
 994
 995                 }
 996
 997         } while (!time_to_die);
 998
 999         lprintf (1, "bye\n");
1000         pthread_exit(NULL);
1001 }
1002
1003 /*
1004  * \brief print log messages
1005  * logs to stderr if loglevel is lower than the verbosity set at startup
1006  * \param loglevel level of the message
1007  * \param format the printf like format string
1008  * \param ... the strings to put into format
1009  */
1010 int lprintf(int loglevel, const char *format, ...)
1011 {
1012         va_list ap;
1013
1014         if (loglevel <= verbosity) {
1015                 va_start(ap, format);
1016                 vfprintf(stderr, format, ap);
1017                 va_end(ap);
1018                 fflush(stderr);
1019         }
1020         return 1;
1021 }
1022
1023
1024 /*
1025  * \brief print the actual stack frame.
1026  */
1027 void wc_backtrace(void)
1028 {
1029 #ifdef HAVE_BACKTRACE
1030         void *stack_frames[50];
1031         size_t size, i;
1032         char **strings;
1033
1034
1035         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
1036         strings = backtrace_symbols(stack_frames, size);
1037         for (i = 0; i < size; i++) {
1038                 if (strings != NULL)
1039                         lprintf(1, "%s\n", strings[i]);
1040                 else
1041                         lprintf(1, "%p\n", stack_frames[i]);
1042         }
1043         free(strings);
1044 #endif
1045 }
1046
1047 /*@}*/