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) 1996-2008 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 extern void *context_loop(int*);
  31 extern void *housekeeping_loop(void);
  32 extern pthread_mutex_t SessionListMutex;
  33 extern pthread_key_t MyConKey;
  34
  35
  36 char ctdl_key_dir[PATH_MAX]=SSL_DIR;
  37 char file_crpt_file_key[PATH_MAX]="";
  38 char file_crpt_file_csr[PATH_MAX]="";
  39 char file_crpt_file_cer[PATH_MAX]="";
  40
  41 char socket_dir[PATH_MAX];                      /* where to talk to our citadel server */
  42 static const char editor_absolut_dir[PATH_MAX]=EDITORDIR;       /* nailed to what configure gives us. */
  43 static char static_dir[PATH_MAX];               /* calculated on startup */
  44 static char static_local_dir[PATH_MAX];         /* calculated on startup */
  45 static char static_icon_dir[PATH_MAX];          /* where should we find our mime icons? */
  46 char  *static_dirs[]={                          /* needs same sort order as the web mapping */
  47         (char*)static_dir,                      /* our templates on disk */
  48         (char*)static_local_dir,                /* user provided templates disk */
  49         (char*)editor_absolut_dir,              /* the editor on disk */
  50         (char*)static_icon_dir                  /* our icons... */
  51 };
  52
  53 /*
  54  * Subdirectories from which the client may request static content
  55  *
  56  * (If you add more, remember to increment 'ndirs' below)
  57  */
  58 char *static_content_dirs[] = {
  59         "static",                     /* static templates */
  60         "static.local",               /* site local static templates */
  61         "tiny_mce"                    /* rich text editor */
  62 };
  63
  64 int ndirs=3;
  65
  66
  67 char *server_cookie = NULL;     /* our Cookie connection to the client */
  68 int http_port = PORT_NUM;       /* Port to listen on */
  69 char *ctdlhost = DEFAULT_HOST;  /* our name */
  70 char *ctdlport = DEFAULT_PORT;  /* our Port */
  71 int setup_wizard = 0;           /* should we run the setup wizard? \todo */
  72 char wizard_filename[PATH_MAX]; /* where's the setup wizard? */
  73 int running_as_daemon = 0;      /* should we deamonize on startup? */
  74
  75
  76 /*
  77  * This is a generic function to set up a master socket for listening on
  78  * a TCP port.  The server shuts down if the bind fails.
  79  *
  80  * ip_addr      IP address to bind
  81  * port_number  port number to bind
  82  * queue_len    number of incoming connections to allow in the queue
  83  */
  84 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
  85 {
  86         struct sockaddr_in sin;
  87         int s, i;
  88
  89         memset(&sin, 0, sizeof(sin));
  90         sin.sin_family = AF_INET;
  91         if (ip_addr == NULL) {
  92                 sin.sin_addr.s_addr = INADDR_ANY;
  93         } else {
  94                 sin.sin_addr.s_addr = inet_addr(ip_addr);
  95         }
  96
  97         if (sin.sin_addr.s_addr == INADDR_NONE) {
  98                 sin.sin_addr.s_addr = INADDR_ANY;
  99         }
 100
 101         if (port_number == 0) {
 102                 lprintf(1, "Cannot start: no port number specified.\n");
 103                 exit(WC_EXIT_BIND);
 104         }
 105         sin.sin_port = htons((u_short) port_number);
 106
 107         s = socket(PF_INET, SOCK_STREAM, (getprotobyname("tcp")->p_proto));
 108         if (s < 0) {
 109                 lprintf(1, "Can't create a socket: %s\n", strerror(errno));
 110                 exit(WC_EXIT_BIND);
 111         }
 112         /* Set some socket options that make sense. */
 113         i = 1;
 114         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 115
 116         fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
 117                                           there should be a preceding F_GETFL
 118                                           and a bitwise OR with the previous
 119                                           fd flags */
 120
 121         if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 122                 lprintf(1, "Can't bind: %s\n", strerror(errno));
 123                 exit(WC_EXIT_BIND);
 124         }
 125         if (listen(s, queue_len) < 0) {
 126                 lprintf(1, "Can't listen: %s\n", strerror(errno));
 127                 exit(WC_EXIT_BIND);
 128         }
 129         return (s);
 130 }
 131
 132
 133
 134 /*
 135  * Create a Unix domain socket and listen on it
 136  * sockpath - file name of the unix domain socket
 137  * queue_len - Number of incoming connections to allow in the queue
 138  */
 139 int ig_uds_server(char *sockpath, int queue_len)
 140 {
 141         struct sockaddr_un addr;
 142         int s;
 143         int i;
 144         int actual_queue_len;
 145
 146         actual_queue_len = queue_len;
 147         if (actual_queue_len < 5) actual_queue_len = 5;
 148
 149         i = unlink(sockpath);
 150         if (i != 0) if (errno != ENOENT) {
 151                 lprintf(1, "webcit: can't unlink %s: %s\n",
 152                         sockpath, strerror(errno));
 153                 exit(WC_EXIT_BIND);
 154         }
 155
 156         memset(&addr, 0, sizeof(addr));
 157         addr.sun_family = AF_UNIX;
 158         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 159
 160         s = socket(AF_UNIX, SOCK_STREAM, 0);
 161         if (s < 0) {
 162                 lprintf(1, "webcit: Can't create a socket: %s\n",
 163                         strerror(errno));
 164                 exit(WC_EXIT_BIND);
 165         }
 166
 167         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 168                 lprintf(1, "webcit: Can't bind: %s\n",
 169                         strerror(errno));
 170                 exit(WC_EXIT_BIND);
 171         }
 172
 173         if (listen(s, actual_queue_len) < 0) {
 174                 lprintf(1, "webcit: Can't listen: %s\n",
 175                         strerror(errno));
 176                 exit(WC_EXIT_BIND);
 177         }
 178
 179         chmod(sockpath, 0777);
 180         return(s);
 181 }
 182
 183
 184
 185
 186 /*
 187  * Read data from the client socket.
 188  *
 189  * sock         socket fd to read from
 190  * buf          buffer to read into
 191  * bytes        number of bytes to read
 192  * timeout      Number of seconds to wait before timing out
 193  *
 194  * Possible return values:
 195  *      1       Requested number of bytes has been read.
 196  *      0       Request timed out.
 197  *      -1      Connection is broken, or other error.
 198  */
 199 int client_read_to(int *sock, char *buf, int bytes, int timeout)
 200 {
 201         int len, rlen;
 202         fd_set rfds;
 203         struct timeval tv;
 204         int retval;
 205
 206
 207 #ifdef HAVE_OPENSSL
 208         if (is_https) {
 209                 return (client_read_ssl(buf, bytes, timeout));
 210         }
 211 #endif
 212
 213         len = 0;
 214         while ((len < bytes) && (*sock > 0)) {
 215                 FD_ZERO(&rfds);
 216                 FD_SET(*sock, &rfds);
 217                 tv.tv_sec = timeout;
 218                 tv.tv_usec = 0;
 219
 220                 retval = select((*sock) + 1, &rfds, NULL, NULL, &tv);
 221                 if (FD_ISSET(*sock, &rfds) == 0) {
 222                         return (0);
 223                 }
 224
 225                 rlen = read(*sock, &buf[len], bytes - len);
 226
 227                 if (rlen < 1) {
 228                         lprintf(2, "client_read() failed: %s\n",
 229                                 strerror(errno));
 230                         if (*sock > 0)
 231                                 close(*sock);
 232                         *sock = -1;
 233                         return (-1);
 234                 }
 235                 len = len + rlen;
 236         }
 237
 238 #ifdef HTTP_TRACING
 239         write(2, "\033[32m", 5);
 240         write(2, buf, bytes);
 241         write(2, "\033[30m", 5);
 242 #endif
 243         return (1);
 244 }
 245
 246
 247 /*
 248  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 249  */
 250 void begin_burst(void)
 251 {
 252         if (WC->WBuf == NULL)
 253                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 254 }
 255
 256
 257 /*
 258  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 259  */
 260 long end_burst(void)
 261 {
 262         struct wcsession *WCC = WC;
 263         const char *ptr, *eptr;
 264         long count;
 265         ssize_t res;
 266         fd_set wset;
 267         int fdflags;
 268
 269 #ifdef HAVE_ZLIB
 270         /* Perform gzip compression, if enabled and supported by client */
 271         if ((WCC->gzip_ok) && CompressBuffer(WCC->WBuf))
 272         {
 273                 hprintf("Content-encoding: gzip\r\n");
 274         }
 275 #endif  /* HAVE_ZLIB */
 276
 277         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 278
 279         ptr = ChrPtr(WCC->HBuf);
 280         count = StrLength(WCC->HBuf);
 281         eptr = ptr + count;
 282
 283 #ifdef HAVE_OPENSSL
 284         if (is_https) {
 285                 client_write_ssl(WCC->HBuf);
 286                 client_write_ssl(WCC->WBuf);
 287                 return (count);
 288         }
 289 #endif
 290
 291
 292 #ifdef HTTP_TRACING
 293
 294         write(2, "\033[34m", 5);
 295         write(2, ptr, StrLength(WCC->WBuf));
 296         write(2, "\033[30m", 5);
 297 #endif
 298         fdflags = fcntl(WC->http_sock, F_GETFL);
 299
 300         while (ptr < eptr) {
 301                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 302                         FD_ZERO(&wset);
 303                         FD_SET(WCC->http_sock, &wset);
 304                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 305                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 306                                 return -1;
 307                         }
 308                 }
 309
 310                 if ((res = write(WCC->http_sock,
 311                                  ptr,
 312                                  count)) == -1) {
 313                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 314                         wc_backtrace();
 315                         return res;
 316                 }
 317                 count -= res;
 318                 ptr += res;
 319         }
 320
 321         ptr = ChrPtr(WCC->WBuf);
 322         count = StrLength(WCC->WBuf);
 323         eptr = ptr + count;
 324
 325 #ifdef HTTP_TRACING
 326
 327         write(2, "\033[34m", 5);
 328         write(2, ptr, StrLength(WCC->WBuf));
 329         write(2, "\033[30m", 5);
 330 #endif
 331
 332         while (ptr < eptr) {
 333                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 334                         FD_ZERO(&wset);
 335                         FD_SET(WCC->http_sock, &wset);
 336                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 337                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 338                                 return -1;
 339                         }
 340                 }
 341
 342                 if ((res = write(WCC->http_sock,
 343                                  ptr,
 344                                  count)) == -1) {
 345                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 346                         wc_backtrace();
 347                         return res;
 348                 }
 349                 count -= res;
 350                 ptr += res;
 351         }
 352
 353         return StrLength(WCC->WBuf);
 354 }
 355
 356
 357
 358 /*
 359  * Read data from the client socket with default timeout.
 360  * (This is implemented in terms of client_read_to() and could be
 361  * justifiably moved out of sysdep.c)
 362  *
 363  * sock         the socket fd to read from
 364  * buf          the buffer to write to
 365  * bytes        Number of bytes to read
 366  */
 367 int client_read(int *sock, char *buf, int bytes)
 368 {
 369         return (client_read_to(sock, buf, bytes, SLEEPING));
 370 }
 371
 372
 373 /*
 374  * Get a LF-terminated line of text from the client.
 375  * (This is implemented in terms of client_read() and could be
 376  * justifiably moved out of sysdep.c)
 377  *
 378  * sock         socket fd to get client line from
 379  * buf          buffer to write read data to
 380  * bufsiz       how many bytes to read
 381  *
 382  * returns the number of bytes read
 383  */
 384 int client_getln(int *sock, char *buf, int bufsiz)
 385 {
 386         int i = 0;
 387         int retval = 0;
 388
 389         /* Read one character at a time.*/
 390         for (i = 0; *sock > 0; i++) {
 391                 retval = client_read(sock, &buf[i], 1);
 392                 if (retval < 0)
 393                         return retval;
 394                 if (retval != 1 || buf[i] == '\n' || i == (bufsiz-1))
 395                         break;
 396                 if ( (!isspace(buf[i])) && (!isprint(buf[i])) ) {
 397                         /* Non printable character recieved from client */
 398                         return(-1);
 399                 }
 400         }
 401
 402         /* If we got a long line, discard characters until the newline. */
 403         if (i == (bufsiz-1))
 404                 while (buf[i] != '\n' && retval == 1)
 405                         retval = client_read(sock, &buf[i], 1);
 406
 407         /*
 408          * Strip any trailing non-printable characters.
 409          */
 410         buf[i] = 0;
 411         while ((i > 0) && (!isprint(buf[i - 1]))) {
 412                 buf[--i] = 0;
 413         }
 414         return (retval);
 415 }
 416
 417 /*
 418  * Shut us down the regular way.
 419  * signum is the signal we want to forward
 420  */
 421 pid_t current_child;
 422 void graceful_shutdown_watcher(int signum) {
 423         lprintf (1, "bye; shutting down watcher.");
 424         kill(current_child, signum);
 425         if (signum != SIGHUP)
 426                 exit(0);
 427 }
 428
 429 /*
 430  * Shut us down the regular way.
 431  * signum is the signal we want to forward
 432  */
 433 pid_t current_child;
 434 void graceful_shutdown(int signum) {
 435 //      kill(current_child, signum);
 436         char wd[SIZ];
 437         FILE *FD;
 438         int fd;
 439         getcwd(wd, SIZ);
 440         lprintf (1, "bye going down gracefull.[%d][%s]\n", signum, wd);
 441         fd = msock;
 442         msock = -1;
 443         time_to_die = 1;
 444         FD=fdopen(fd, "a+");
 445         fflush (FD);
 446         fclose (FD);
 447         close(fd);
 448 }
 449
 450
 451 /*
 452  * Start running as a daemon.
 453  */
 454 void start_daemon(char *pid_file)
 455 {
 456         int status = 0;
 457         pid_t child = 0;
 458         FILE *fp;
 459         int do_restart = 0;
 460
 461         current_child = 0;
 462
 463         /* Close stdin/stdout/stderr and replace them with /dev/null.
 464          * We don't just call close() because we don't want these fd's
 465          * to be reused for other files.
 466          */
 467         chdir("/");
 468
 469         signal(SIGHUP, SIG_IGN);
 470         signal(SIGINT, SIG_IGN);
 471         signal(SIGQUIT, SIG_IGN);
 472
 473         child = fork();
 474         if (child != 0) {
 475                 exit(0);
 476         }
 477
 478         setsid();
 479         umask(0);
 480         freopen("/dev/null", "r", stdin);
 481         freopen("/dev/null", "w", stdout);
 482         freopen("/dev/null", "w", stderr);
 483         signal(SIGTERM, graceful_shutdown_watcher);
 484         signal(SIGHUP, graceful_shutdown_watcher);
 485
 486         do {
 487                 current_child = fork();
 488
 489
 490                 if (current_child < 0) {
 491                         perror("fork");
 492                         ShutDownLibCitadel ();
 493                         exit(errno);
 494                 }
 495
 496                 else if (current_child == 0) {  // child process
 497 //                      signal(SIGTERM, graceful_shutdown);
 498                         signal(SIGHUP, graceful_shutdown);
 499
 500                         return; /* continue starting webcit. */
 501                 }
 502
 503                 else { // watcher process
 504 //                      signal(SIGTERM, SIG_IGN);
 505 //                      signal(SIGHUP, SIG_IGN);
 506                         if (pid_file) {
 507                                 fp = fopen(pid_file, "w");
 508                                 if (fp != NULL) {
 509                                         fprintf(fp, "%d\n", getpid());
 510                                         fclose(fp);
 511                                 }
 512                         }
 513                         waitpid(current_child, &status, 0);
 514                 }
 515
 516                 do_restart = 0;
 517
 518                 /* Did the main process exit with an actual exit code? */
 519                 if (WIFEXITED(status)) {
 520
 521                         /* Exit code 0 means the watcher should exit */
 522                         if (WEXITSTATUS(status) == 0) {
 523                                 do_restart = 0;
 524                         }
 525
 526                         /* Exit code 101-109 means the watcher should exit */
 527                         else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
 528                                 do_restart = 0;
 529                         }
 530
 531                         /* Any other exit code means we should restart. */
 532                         else {
 533                                 do_restart = 1;
 534                         }
 535                 }
 536
 537                 /* Any other type of termination (signals, etc.) should also restart. */
 538                 else {
 539                         do_restart = 1;
 540                 }
 541
 542         } while (do_restart);
 543
 544         if (pid_file) {
 545                 unlink(pid_file);
 546         }
 547         ShutDownLibCitadel ();
 548         exit(WEXITSTATUS(status));
 549 }
 550
 551 /*
 552  * Spawn an additional worker thread into the pool.
 553  */
 554 void spawn_another_worker_thread()
 555 {
 556         pthread_t SessThread;   /* Thread descriptor */
 557         pthread_attr_t attr;    /* Thread attributes */
 558         int ret;
 559
 560         lprintf(3, "Creating a new thread\n");
 561
 562         /* set attributes for the new thread */
 563         pthread_attr_init(&attr);
 564         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 565
 566         /*
 567          * Our per-thread stacks need to be bigger than the default size, otherwise
 568          * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
 569          * 64-bit Linux.
 570          */
 571         if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
 572                 lprintf(1, "pthread_attr_setstacksize: %s\n",
 573                         strerror(ret));
 574                 pthread_attr_destroy(&attr);
 575         }
 576
 577         /* now create the thread */
 578         if (pthread_create(&SessThread, &attr,
 579                            (void *(*)(void *)) worker_entry, NULL)
 580             != 0) {
 581                 lprintf(1, "Can't create thread: %s\n", strerror(errno));
 582         }
 583
 584         /* free up the attributes */
 585         pthread_attr_destroy(&attr);
 586 }
 587
 588 //#define DBG_PRINNT_HOOKS_AT_START
 589 #ifdef DBG_PRINNT_HOOKS_AT_START
 590 const char foobuf[32];
 591 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
 592 #endif
 593 void InitTemplateCache(void);
 594 extern int LoadTemplates;
 595 extern void LoadZoneFiles(void);
 596
 597 /*
 598  * Here's where it all begins.
 599  */
 600 int main(int argc, char **argv)
 601 {
 602         pthread_t SessThread;           /* Thread descriptor */
 603         pthread_attr_t attr;            /* Thread attributes */
 604         int a, i;                       /* General-purpose variables */
 605         char tracefile[PATH_MAX];
 606         char ip_addr[256]="0.0.0.0";
 607         char dirbuffer[PATH_MAX]="";
 608         int relh=0;
 609         int home=0;
 610         int home_specified=0;
 611         char relhome[PATH_MAX]="";
 612         char webcitdir[PATH_MAX] = DATADIR;
 613         char *pidfile = NULL;
 614         char *hdir;
 615         const char *basedir;
 616 #ifdef ENABLE_NLS
 617         char *locale = NULL;
 618         char *mo = NULL;
 619 #endif /* ENABLE_NLS */
 620         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
 621
 622         HandlerHash = NewHash(1, NULL);
 623         PreferenceHooks = NewHash(1, NULL);
 624         WirelessTemplateCache = NewHash(1, NULL);
 625         WirelessLocalTemplateCache = NewHash(1, NULL);
 626         LocalTemplateCache = NewHash(1, NULL);
 627         TemplateCache = NewHash(1, NULL);
 628         GlobalNS = NewHash(1, NULL);
 629         Iterators = NewHash(1, NULL);
 630         Contitionals = NewHash(1, NULL);
 631         LoadZoneFiles();
 632
 633
 634 #ifdef DBG_PRINNT_HOOKS_AT_START
 635         dbg_PrintHash(HandlerHash, nix, NULL);
 636 #endif
 637
 638         /* Ensure that we are linked to the correct version of libcitadel */
 639         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 640                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 641                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 642                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 643                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 644                 return(1);
 645         }
 646
 647         strcpy(uds_listen_path, "");
 648
 649         /* Parse command line */
 650 #ifdef HAVE_OPENSSL
 651         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:cfs")) != EOF)
 652 #else
 653         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:cf")) != EOF)
 654 #endif
 655                 switch (a) {
 656                 case 'h':
 657                         hdir = strdup(optarg);
 658                         relh=hdir[0]!='/';
 659                         if (!relh) safestrncpy(webcitdir, hdir,
 660                                                                    sizeof webcitdir);
 661                         else
 662                                 safestrncpy(relhome, relhome,
 663                                                         sizeof relhome);
 664                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 665                         home_specified = 1;
 666                         home=1;
 667                         break;
 668                 case 'd':
 669                         running_as_daemon = 1;
 670                         break;
 671                 case 'D':
 672                         pidfile = strdup(optarg);
 673                         running_as_daemon = 1;
 674                         break;
 675                 case 'i':
 676                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 677                         break;
 678                 case 'p':
 679                         http_port = atoi(optarg);
 680                         if (http_port == 0) {
 681                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 682                         }
 683                         break;
 684                 case 't':
 685                         safestrncpy(tracefile, optarg, sizeof tracefile);
 686                         freopen(tracefile, "w", stdout);
 687                         freopen(tracefile, "w", stderr);
 688                         freopen(tracefile, "r", stdin);
 689                         break;
 690                 case 'T':
 691                         LoadTemplates = atoi(optarg);
 692                         break;
 693                 case 'x':
 694                         verbosity = atoi(optarg);
 695                         break;
 696                 case 'f':
 697                         follow_xff = 1;
 698                         break;
 699                 case 'c':
 700                         server_cookie = malloc(256);
 701                         if (server_cookie != NULL) {
 702                                 safestrncpy(server_cookie,
 703                                        "Set-cookie: wcserver=",
 704                                         256);
 705                                 if (gethostname
 706                                     (&server_cookie[strlen(server_cookie)],
 707                                      200) != 0) {
 708                                         lprintf(2, "gethostname: %s\n",
 709                                                 strerror(errno));
 710                                         free(server_cookie);
 711                                 }
 712                         }
 713                         break;
 714                 case 's':
 715                         is_https = 1;
 716                         break;
 717                 default:
 718                         fprintf(stderr, "usage: webcit "
 719                                 "[-i ip_addr] [-p http_port] "
 720                                 "[-t tracefile] [-c] [-f] "
 721                                 "[-T Templatedebuglevel] "
 722                                 "[-d] "
 723 #ifdef HAVE_OPENSSL
 724                                 "[-s] "
 725 #endif
 726                                 "[remotehost [remoteport]]\n");
 727                         return 1;
 728                 }
 729
 730         if (optind < argc) {
 731                 ctdlhost = argv[optind];
 732                 if (++optind < argc)
 733                         ctdlport = argv[optind];
 734         }
 735
 736         /* daemonize, if we were asked to */
 737         if (running_as_daemon) {
 738                 start_daemon(pidfile);
 739         }
 740         else {
 741 ///             signal(SIGTERM, graceful_shutdown);
 742                 signal(SIGHUP, graceful_shutdown);
 743         }
 744
 745         /* Tell 'em who's in da house */
 746         lprintf(1, PACKAGE_STRING "\n");
 747         lprintf(1, "Copyright (C) 1996-2008 by the Citadel development team.\n"
 748                 "This software is distributed under the terms of the "
 749                 "GNU General Public License.\n\n"
 750         );
 751
 752
 753         /* initialize the International Bright Young Thing */
 754 #ifdef ENABLE_NLS
 755         initialize_locales();
 756
 757         locale = setlocale(LC_ALL, "");
 758
 759         mo = malloc(strlen(webcitdir) + 20);
 760         lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
 761         free(mo);
 762         lprintf(9, "Text domain: %s\n", textdomain("webcit"));
 763         lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
 764         preset_locale();
 765 #endif
 766
 767
 768         /* calculate all our path on a central place */
 769     /* where to keep our config */
 770
 771 #define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
 772         snprintf(SUBDIR,sizeof SUBDIR,  "%s%s%s%s%s%s%s", \
 773                          (home&!relh)?webcitdir:basedir, \
 774              ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
 775              ((basedir!=webcitdir)&(home&!relh))?"/":"", \
 776                          relhome, \
 777              (relhome[0]!='\0')?"/":"",\
 778                          dirbuffer,\
 779                          (dirbuffer[0]!='\0')?"/":"");
 780         basedir=RUNDIR;
 781         COMPUTE_DIRECTORY(socket_dir);
 782         basedir=WWWDIR "/static";
 783         COMPUTE_DIRECTORY(static_dir);
 784         basedir=WWWDIR "/static/icons";
 785         COMPUTE_DIRECTORY(static_icon_dir);
 786         basedir=WWWDIR "/static.local";
 787         COMPUTE_DIRECTORY(static_local_dir);
 788
 789         snprintf(file_crpt_file_key,
 790                  sizeof file_crpt_file_key,
 791                  "%s/citadel.key",
 792                  ctdl_key_dir);
 793         snprintf(file_crpt_file_csr,
 794                  sizeof file_crpt_file_csr,
 795                  "%s/citadel.csr",
 796                  ctdl_key_dir);
 797         snprintf(file_crpt_file_cer,
 798                  sizeof file_crpt_file_cer,
 799                  "%s/citadel.cer",
 800                  ctdl_key_dir);
 801
 802         /* we should go somewhere we can leave our coredump, if enabled... */
 803         lprintf(9, "Changing directory to %s\n", socket_dir);
 804         if (chdir(webcitdir) != 0) {
 805                 perror("chdir");
 806         }
 807         LoadIconDir(static_icon_dir);
 808         InitTemplateCache();
 809
 810         initialise_modules();
 811         initialize_viewdefs();
 812         initialize_axdefs();
 813
 814         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 815         icalerror_errors_are_fatal = 0;
 816
 817         /*
 818          * Set up a place to put thread-specific data.
 819          * We only need a single pointer per thread - it points to the
 820          * wcsession struct to which the thread is currently bound.
 821          */
 822         if (pthread_key_create(&MyConKey, NULL) != 0) {
 823                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 824         }
 825         InitialiseSemaphores ();
 826
 827         /*
 828          * Set up a place to put thread-specific SSL data.
 829          * We don't stick this in the wcsession struct because SSL starts
 830          * up before the session is bound, and it gets torn down between
 831          * transactions.
 832          */
 833 #ifdef HAVE_OPENSSL
 834         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 835                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 836         }
 837 #endif
 838
 839         /*
 840          * Bind the server to our favorite port.
 841          * There is no need to check for errors, because ig_tcp_server()
 842          * exits if it doesn't succeed.
 843          */
 844
 845         if (!IsEmptyStr(uds_listen_path)) {
 846                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 847                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 848         }
 849         else {
 850                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 851                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 852         }
 853
 854         lprintf(2, "Listening on socket %d\n", msock);
 855         signal(SIGPIPE, SIG_IGN);
 856
 857         pthread_mutex_init(&SessionListMutex, NULL);
 858
 859         /*
 860          * Start up the housekeeping thread
 861          */
 862         pthread_attr_init(&attr);
 863         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 864         pthread_create(&SessThread, &attr,
 865                        (void *(*)(void *)) housekeeping_loop, NULL);
 866
 867
 868         /*
 869          * If this is an HTTPS server, fire up SSL
 870          */
 871 #ifdef HAVE_OPENSSL
 872         if (is_https) {
 873                 init_ssl();
 874         }
 875 #endif
 876
 877         /* Start a few initial worker threads */
 878         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 879                 spawn_another_worker_thread();
 880         }
 881
 882         /* now the original thread becomes another worker */
 883         worker_entry();
 884         ShutDownLibCitadel ();
 885         DeleteHash(&HandlerHash);
 886         DeleteHash(&PreferenceHooks);
 887         return 0;
 888 }
 889
 890
 891 void ShutDownWebcit(void)
 892 {
 893         DeleteHash(&ZoneHash);
 894         free_zone_directory ();
 895         icaltimezone_release_zone_tab ();
 896         icalmemory_free_ring ();
 897         ShutDownLibCitadel ();
 898         DeleteHash(&HandlerHash);
 899         DeleteHash(&PreferenceHooks);
 900         DeleteHash(&GlobalNS);
 901         DeleteHash(&WirelessTemplateCache);
 902         DeleteHash(&WirelessLocalTemplateCache);
 903         DeleteHash(&TemplateCache);
 904         DeleteHash(&LocalTemplateCache);
 905         DeleteHash(&Iterators);
 906         DeleteHash(&Contitionals);
 907 #ifdef ENABLE_NLS
 908         ShutdownLocale();
 909 #endif
 910 #ifdef HAVE_OPENSSL
 911         if (is_https) {
 912                 shutdown_ssl();
 913         }
 914 #endif
 915 }
 916
 917 /*
 918  * Entry point for worker threads
 919  */
 920 void worker_entry(void)
 921 {
 922         int ssock;
 923         int i = 0;
 924         int fail_this_transaction = 0;
 925         int ret;
 926         struct timeval tv;
 927         fd_set readset, tempset;
 928
 929         tv.tv_sec = 0;
 930         tv.tv_usec = 10000;
 931         FD_ZERO(&readset);
 932         FD_SET(msock, &readset);
 933
 934         do {
 935                 /* Only one thread can accept at a time */
 936                 fail_this_transaction = 0;
 937                 ssock = -1;
 938                 errno = EAGAIN;
 939                 do {
 940                         ret = -1; /* just one at once should select... */
 941                         begin_critical_section(S_SELECT);
 942
 943                         FD_ZERO(&tempset);
 944                         if (msock > 0) FD_SET(msock, &tempset);
 945                         tv.tv_sec = 0;
 946                         tv.tv_usec = 10000;
 947                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
 948                         end_critical_section(S_SELECT);
 949                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
 950                         {// EINTR and EAGAIN are thrown but not of interest.
 951                                 lprintf(2, "accept() failed:%d %s\n",
 952                                         errno, strerror(errno));
 953                         }
 954                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
 955                         {// Successfully selected, and still not shutting down? Accept!
 956                                 ssock = accept(msock, NULL, 0);
 957                         }
 958
 959                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
 960
 961                 if ((msock == -1)||(time_to_die))
 962                 {// ok, we're going down.
 963                         int shutdown = 0;
 964
 965                         /* the first to come here will have to do the cleanup.
 966                          * make shure its realy just one.
 967                          */
 968                         begin_critical_section(S_SHUTDOWN);
 969                         if (msock == -1)
 970                         {
 971                                 msock = -2;
 972                                 shutdown = 1;
 973                         }
 974                         end_critical_section(S_SHUTDOWN);
 975                         if (shutdown == 1)
 976                         {// we're the one to cleanup the mess.
 977                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
 978                                 shutdown_sessions();
 979                                 lprintf(2, "master shutdown: waiting for others\n");
 980                                 sleeeeeeeeeep(1); // wait so some others might finish...
 981                                 lprintf(2, "master shutdown: cleaning up sessions\n");
 982                                 do_housekeeping();
 983                                 lprintf(2, "master shutdown: cleaning up libical\n");
 984
 985                                 ShutDownWebcit();
 986
 987                                 lprintf(2, "master shutdown exiting!.\n");
 988                                 exit(0);
 989                         }
 990                         break;
 991                 }
 992                 if (ssock < 0 ) continue;
 993
 994                 if (msock < 0) {
 995                         if (ssock > 0) close (ssock);
 996                         lprintf(2, "inbetween.");
 997                         pthread_exit(NULL);
 998                 } else { // Got it? do some real work!
 999                         /* Set the SO_REUSEADDR socket option */
1000                         i = 1;
1001                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
1002                                    &i, sizeof(i));
1003
1004                         /* If we are an HTTPS server, go crypto now. */
1005 #ifdef HAVE_OPENSSL
1006                         if (is_https) {
1007                                 if (starttls(ssock) != 0) {
1008                                         fail_this_transaction = 1;
1009                                         close(ssock);
1010                                 }
1011                         }
1012 #endif
1013
1014                         if (fail_this_transaction == 0) {
1015
1016                                 /* Perform an HTTP transaction... */
1017                                 context_loop(&ssock);
1018
1019                                 /* Shut down SSL/TLS if required... */
1020 #ifdef HAVE_OPENSSL
1021                                 if (is_https) {
1022                                         endtls();
1023                                 }
1024 #endif
1025
1026                                 /* ...and close the socket. */
1027                                 if (ssock > 0)
1028                                         lingering_close(ssock);
1029                         }
1030
1031                 }
1032
1033         } while (!time_to_die);
1034
1035         lprintf (1, "bye\n");
1036         pthread_exit(NULL);
1037 }
1038
1039 /*
1040  * print log messages
1041  * logs to stderr if loglevel is lower than the verbosity set at startup
1042  *
1043  * loglevel     level of the message
1044  * format       the printf like format string
1045  * ...          the strings to put into format
1046  */
1047 int lprintf(int loglevel, const char *format, ...)
1048 {
1049         va_list ap;
1050
1051         if (loglevel <= verbosity) {
1052                 va_start(ap, format);
1053                 vfprintf(stderr, format, ap);
1054                 va_end(ap);
1055                 fflush(stderr);
1056         }
1057         return 1;
1058 }
1059
1060
1061 /*
1062  * print the actual stack frame.
1063  */
1064 void wc_backtrace(void)
1065 {
1066 #ifdef HAVE_BACKTRACE
1067         void *stack_frames[50];
1068         size_t size, i;
1069         char **strings;
1070
1071
1072         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
1073         strings = backtrace_symbols(stack_frames, size);
1074         for (i = 0; i < size; i++) {
1075                 if (strings != NULL)
1076                         lprintf(1, "%s\n", strings[i]);
1077                 else
1078                         lprintf(1, "%p\n", stack_frames[i]);
1079         }
1080         free(strings);
1081 #endif
1082 }
1083