webcit/webserver.c

   1 /*
   2  * $Id$
   3  *
   4  * This contains a simple multithreaded TCP server manager.  It sits around
   5  * waiting on the specified port for incoming HTTP connections.  When a
   6  * connection is established, it calls context_loop() from context_loop.c.
   7  *
   8  * Copyright (c) 1996-2009 by the citadel.org developers.
   9  * This program is released under the terms of the GNU General Public License v3.
  10  *
  11  */
  12
  13 #include "webcit.h"
  14 #include "webserver.h"
  15
  16 #if HAVE_BACKTRACE
  17 #include <execinfo.h>
  18 #endif
  19 #include "modules_init.h"
  20 #ifndef HAVE_SNPRINTF
  21 int vsnprintf(char *buf, size_t max, const char *fmt, va_list argp);
  22 #endif
  23
  24 int verbosity = 9;              /* Logging level */
  25 int msock;                      /* master listening socket */
  26 int is_https = 0;               /* Nonzero if I am an HTTPS service */
  27 int follow_xff = 0;             /* Follow X-Forwarded-For: header */
  28 int home_specified = 0;         /* did the user specify a homedir? */
  29 int time_to_die = 0;            /* Nonzero if server is shutting down */
  30 int DisableGzip = 0;
  31 extern void *context_loop(int*);
  32 extern void *housekeeping_loop(void);
  33 extern pthread_mutex_t SessionListMutex;
  34 extern pthread_key_t MyConKey;
  35
  36
  37 char ctdl_key_dir[PATH_MAX]=SSL_DIR;
  38 char file_crpt_file_key[PATH_MAX]="";
  39 char file_crpt_file_csr[PATH_MAX]="";
  40 char file_crpt_file_cer[PATH_MAX]="";
  41
  42 char socket_dir[PATH_MAX];                      /* where to talk to our citadel server */
  43 static const char editor_absolut_dir[PATH_MAX]=EDITORDIR;       /* nailed to what configure gives us. */
  44 static char static_dir[PATH_MAX];               /* calculated on startup */
  45 static char static_local_dir[PATH_MAX];         /* calculated on startup */
  46 static char static_icon_dir[PATH_MAX];          /* where should we find our mime icons? */
  47 char  *static_dirs[]={                          /* needs same sort order as the web mapping */
  48         (char*)static_dir,                      /* our templates on disk */
  49         (char*)static_local_dir,                /* user provided templates disk */
  50         (char*)editor_absolut_dir,              /* the editor on disk */
  51         (char*)static_icon_dir                  /* our icons... */
  52 };
  53
  54 /*
  55  * Subdirectories from which the client may request static content
  56  *
  57  * (If you add more, remember to increment 'ndirs' below)
  58  */
  59 char *static_content_dirs[] = {
  60         "static",                     /* static templates */
  61         "static.local",               /* site local static templates */
  62         "tiny_mce"                    /* rich text editor */
  63 };
  64
  65 int ndirs=3;
  66
  67
  68 char *server_cookie = NULL;     /* our Cookie connection to the client */
  69 int http_port = PORT_NUM;       /* Port to listen on */
  70 char *ctdlhost = DEFAULT_HOST;  /* our name */
  71 char *ctdlport = DEFAULT_PORT;  /* our Port */
  72 int setup_wizard = 0;           /* should we run the setup wizard? \todo */
  73 char wizard_filename[PATH_MAX]; /* where's the setup wizard? */
  74 int running_as_daemon = 0;      /* should we deamonize on startup? */
  75
  76
  77 /*
  78  * This is a generic function to set up a master socket for listening on
  79  * a TCP port.  The server shuts down if the bind fails.
  80  *
  81  * ip_addr      IP address to bind
  82  * port_number  port number to bind
  83  * queue_len    number of incoming connections to allow in the queue
  84  */
  85 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
  86 {
  87         struct sockaddr_in sin;
  88         int s, i;
  89
  90         memset(&sin, 0, sizeof(sin));
  91         sin.sin_family = AF_INET;
  92         if (ip_addr == NULL) {
  93                 sin.sin_addr.s_addr = INADDR_ANY;
  94         } else {
  95                 sin.sin_addr.s_addr = inet_addr(ip_addr);
  96         }
  97
  98         if (sin.sin_addr.s_addr == INADDR_NONE) {
  99                 sin.sin_addr.s_addr = INADDR_ANY;
 100         }
 101
 102         if (port_number == 0) {
 103                 lprintf(1, "Cannot start: no port number specified.\n");
 104                 exit(WC_EXIT_BIND);
 105         }
 106         sin.sin_port = htons((u_short) port_number);
 107
 108         s = socket(PF_INET, SOCK_STREAM, (getprotobyname("tcp")->p_proto));
 109         if (s < 0) {
 110                 lprintf(1, "Can't create a socket: %s\n", strerror(errno));
 111                 exit(WC_EXIT_BIND);
 112         }
 113         /* Set some socket options that make sense. */
 114         i = 1;
 115         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 116
 117         #ifndef __APPLE__
 118         fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
 119                                           there should be a preceding F_GETFL
 120                                           and a bitwise OR with the previous
 121                                           fd flags */
 122         #endif
 123
 124         if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 125                 lprintf(1, "Can't bind: %s\n", strerror(errno));
 126                 exit(WC_EXIT_BIND);
 127         }
 128         if (listen(s, queue_len) < 0) {
 129                 lprintf(1, "Can't listen: %s\n", strerror(errno));
 130                 exit(WC_EXIT_BIND);
 131         }
 132         return (s);
 133 }
 134
 135
 136
 137 /*
 138  * Create a Unix domain socket and listen on it
 139  * sockpath - file name of the unix domain socket
 140  * queue_len - Number of incoming connections to allow in the queue
 141  */
 142 int ig_uds_server(char *sockpath, int queue_len)
 143 {
 144         struct sockaddr_un addr;
 145         int s;
 146         int i;
 147         int actual_queue_len;
 148
 149         actual_queue_len = queue_len;
 150         if (actual_queue_len < 5) actual_queue_len = 5;
 151
 152         i = unlink(sockpath);
 153         if ((i != 0) && (errno != ENOENT)) {
 154                 lprintf(1, "webcit: can't unlink %s: %s\n",
 155                         sockpath, strerror(errno));
 156                 exit(WC_EXIT_BIND);
 157         }
 158
 159         memset(&addr, 0, sizeof(addr));
 160         addr.sun_family = AF_UNIX;
 161         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 162
 163         s = socket(AF_UNIX, SOCK_STREAM, 0);
 164         if (s < 0) {
 165                 lprintf(1, "webcit: Can't create a socket: %s\n",
 166                         strerror(errno));
 167                 exit(WC_EXIT_BIND);
 168         }
 169
 170         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 171                 lprintf(1, "webcit: Can't bind: %s\n",
 172                         strerror(errno));
 173                 exit(WC_EXIT_BIND);
 174         }
 175
 176         if (listen(s, actual_queue_len) < 0) {
 177                 lprintf(1, "webcit: Can't listen: %s\n",
 178                         strerror(errno));
 179                 exit(WC_EXIT_BIND);
 180         }
 181
 182         chmod(sockpath, 0777);
 183         return(s);
 184 }
 185
 186
 187
 188
 189 /*
 190  * Read data from the client socket.
 191  *
 192  * sock         socket fd to read from
 193  * buf          buffer to read into
 194  * bytes        number of bytes to read
 195  * timeout      Number of seconds to wait before timing out
 196  *
 197  * Possible return values:
 198  *      1       Requested number of bytes has been read.
 199  *      0       Request timed out.
 200  *      -1      Connection is broken, or other error.
 201  */
 202 int client_read_to(int *sock, StrBuf *Target, StrBuf *Buf, int bytes, int timeout)
 203 {
 204         const char *Error;
 205         int retval = 0;
 206
 207 #ifdef HAVE_OPENSSL
 208         if (is_https) {
 209                 while ((StrLength(Buf) + StrLength(Target) < bytes) &&
 210                        (retval >= 0))
 211                         retval = client_read_sslbuffer(Buf, timeout);
 212                 if (retval >= 0) {
 213                         StrBufAppendBuf(Target, Buf, 0); /* todo: Buf > bytes? */
 214 #ifdef HTTP_TRACING
 215                         write(2, "\033[32m", 5);
 216                         write(2, buf, bytes);
 217                         write(2, "\033[30m", 5);
 218 #endif
 219                         return 1;
 220                 }
 221                 else {
 222                         lprintf(2, "client_read_ssl() failed\n");
 223                         return -1;
 224                 }
 225         }
 226 #endif
 227
 228         if (StrLength(Buf) > 0) {/*/// todo: what if Buf > bytes?*/
 229                 StrBufAppendBuf(Target, Buf, 0);
 230         }
 231         retval = StrBufReadBLOB(Target,
 232                            sock,
 233                            (StrLength(Target) > 0),
 234                            bytes - StrLength(Target),
 235                                 &Error);
 236         if (retval < 0) {
 237                 lprintf(2, "client_read() failed: %s\n",
 238                         Error);
 239                 return retval;
 240         }
 241
 242 #ifdef HTTP_TRACING
 243         write(2, "\033[32m", 5);
 244         write(2, buf, bytes);
 245         write(2, "\033[30m", 5);
 246 #endif
 247         return 1;
 248 }
 249
 250
 251 /*
 252  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 253  */
 254 void begin_burst(void)
 255 {
 256         if (WC->WBuf == NULL) {
 257                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 258         }
 259 }
 260
 261
 262 /*
 263  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 264  */
 265 long end_burst(void)
 266 {
 267         wcsession *WCC = WC;
 268         const char *ptr, *eptr;
 269         long count;
 270         ssize_t res;
 271         fd_set wset;
 272         int fdflags;
 273
 274 #ifdef HAVE_ZLIB
 275         /* Perform gzip compression, if enabled and supported by client */
 276         if (!DisableGzip && (WCC->gzip_ok) && CompressBuffer(WCC->WBuf))
 277         {
 278                 hprintf("Content-encoding: gzip\r\n");
 279         }
 280 #endif  /* HAVE_ZLIB */
 281
 282         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 283
 284         ptr = ChrPtr(WCC->HBuf);
 285         count = StrLength(WCC->HBuf);
 286         eptr = ptr + count;
 287
 288 #ifdef HAVE_OPENSSL
 289         if (is_https) {
 290                 client_write_ssl(WCC->HBuf);
 291                 client_write_ssl(WCC->WBuf);
 292                 return (count);
 293         }
 294 #endif
 295
 296
 297 #ifdef HTTP_TRACING
 298
 299         write(2, "\033[34m", 5);
 300         write(2, ptr, StrLength(WCC->WBuf));
 301         write(2, "\033[30m", 5);
 302 #endif
 303         fdflags = fcntl(WC->http_sock, F_GETFL);
 304
 305         while (ptr < eptr) {
 306                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 307                         FD_ZERO(&wset);
 308                         FD_SET(WCC->http_sock, &wset);
 309                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 310                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 311                                 return -1;
 312                         }
 313                 }
 314
 315                 if ((res = write(WCC->http_sock,
 316                                  ptr,
 317                                  count)) == -1) {
 318                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 319                         wc_backtrace();
 320                         return res;
 321                 }
 322                 count -= res;
 323                 ptr += res;
 324         }
 325
 326         ptr = ChrPtr(WCC->WBuf);
 327         count = StrLength(WCC->WBuf);
 328         eptr = ptr + count;
 329
 330 #ifdef HTTP_TRACING
 331
 332         write(2, "\033[34m", 5);
 333         write(2, ptr, StrLength(WCC->WBuf));
 334         write(2, "\033[30m", 5);
 335 #endif
 336
 337         while (ptr < eptr) {
 338                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 339                         FD_ZERO(&wset);
 340                         FD_SET(WCC->http_sock, &wset);
 341                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 342                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 343                                 return -1;
 344                         }
 345                 }
 346
 347                 if ((res = write(WCC->http_sock,
 348                                  ptr,
 349                                  count)) == -1) {
 350                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 351                         wc_backtrace();
 352                         return res;
 353                 }
 354                 count -= res;
 355                 ptr += res;
 356         }
 357
 358         return StrLength(WCC->WBuf);
 359 }
 360
 361
 362
 363 /*
 364  * Read data from the client socket with default timeout.
 365  * (This is implemented in terms of client_read_to() and could be
 366  * justifiably moved out of sysdep.c)
 367  *
 368  * sock         the socket fd to read from
 369  * buf          the buffer to write to
 370  * bytes        Number of bytes to read
 371  */
 372 int client_read(int *sock, StrBuf *Target, StrBuf *buf, int bytes)
 373 {
 374         return (client_read_to(sock, Target, buf, bytes, SLEEPING));
 375 }
 376
 377
 378
 379 /*
 380  * Shut us down the regular way.
 381  * signum is the signal we want to forward
 382  */
 383 pid_t current_child;
 384 void graceful_shutdown_watcher(int signum) {
 385         lprintf (1, "bye; shutting down watcher.");
 386         kill(current_child, signum);
 387         if (signum != SIGHUP)
 388                 exit(0);
 389 }
 390
 391
 392 int ClientGetLine(int *sock, StrBuf *Target, StrBuf *CLineBuf)
 393 {
 394         const char *Error, *pch, *pchs;
 395         int rlen, len, retval = 0;
 396
 397         if (is_https) {
 398                 int ntries = 0;
 399                 if (StrLength(CLineBuf) > 0) {
 400                         pchs = ChrPtr(CLineBuf);
 401                         pch = strchr(pchs, '\n');
 402                         if (pch != NULL) {
 403                                 rlen = 0;
 404                                 len = pch - pchs;
 405                                 if (len > 0 && (*(pch - 1) == '\r') )
 406                                         rlen ++;
 407                                 StrBufSub(Target, CLineBuf, 0, len - rlen);
 408                                 StrBufCutLeft(CLineBuf, len + 1);
 409                                 return len - rlen;
 410                         }
 411                 }
 412
 413                 while (retval == 0) {
 414                                 pch = NULL;
 415                                 pchs = ChrPtr(CLineBuf);
 416                                 if (*pchs != '\0')
 417                                         pch = strchr(pchs, '\n');
 418                                 if (pch == NULL) {
 419                                         retval = client_read_sslbuffer(CLineBuf, SLEEPING);
 420                                         pchs = ChrPtr(CLineBuf);
 421                                         pch = strchr(pchs, '\n');
 422                                 }
 423                                 if (retval == 0) {
 424                                         sleeeeeeeeeep(1);
 425                                         ntries ++;
 426                                 }
 427                                 if (ntries > 10)
 428                                         return 0;
 429                 }
 430                 if ((retval > 0) && (pch != NULL)) {
 431                         rlen = 0;
 432                         len = pch - pchs;
 433                         if (len > 0 && (*(pch - 1) == '\r') )
 434                                 rlen ++;
 435                         StrBufSub(Target, CLineBuf, 0, len - rlen);
 436                         StrBufCutLeft(CLineBuf, len + 1);
 437                         return len - rlen;
 438
 439                 }
 440                 else
 441                         return -1;
 442         }
 443         else
 444                 return StrBufTCP_read_buffered_line(Target,
 445                                                     CLineBuf,
 446                                                     sock,
 447                                                     5,
 448                                                     1,
 449                                                     &Error);
 450 }
 451
 452
 453
 454 /*
 455  * Shut us down the regular way.
 456  * signum is the signal we want to forward
 457  */
 458 pid_t current_child;
 459 void graceful_shutdown(int signum) {
 460         char wd[SIZ];
 461         FILE *FD;
 462         int fd;
 463         getcwd(wd, SIZ);
 464         lprintf (1, "bye going down gracefull.[%d][%s]\n", signum, wd);
 465         fd = msock;
 466         msock = -1;
 467         time_to_die = 1;
 468         FD=fdopen(fd, "a+");
 469         fflush (FD);
 470         fclose (FD);
 471         close(fd);
 472 }
 473
 474
 475 /*
 476  * Start running as a daemon.
 477  */
 478 void start_daemon(char *pid_file)
 479 {
 480         int status = 0;
 481         pid_t child = 0;
 482         FILE *fp;
 483         int do_restart = 0;
 484
 485         current_child = 0;
 486
 487         /* Close stdin/stdout/stderr and replace them with /dev/null.
 488          * We don't just call close() because we don't want these fd's
 489          * to be reused for other files.
 490          */
 491         chdir("/");
 492
 493         signal(SIGHUP, SIG_IGN);
 494         signal(SIGINT, SIG_IGN);
 495         signal(SIGQUIT, SIG_IGN);
 496
 497         child = fork();
 498         if (child != 0) {
 499                 exit(0);
 500         }
 501
 502         setsid();
 503         umask(0);
 504         freopen("/dev/null", "r", stdin);
 505         freopen("/dev/null", "w", stdout);
 506         freopen("/dev/null", "w", stderr);
 507         signal(SIGTERM, graceful_shutdown_watcher);
 508         signal(SIGHUP, graceful_shutdown_watcher);
 509
 510         do {
 511                 current_child = fork();
 512
 513
 514                 if (current_child < 0) {
 515                         perror("fork");
 516                         ShutDownLibCitadel ();
 517                         exit(errno);
 518                 }
 519
 520                 else if (current_child == 0) {  /* child process */
 521                         signal(SIGHUP, graceful_shutdown);
 522
 523                         return; /* continue starting webcit. */
 524                 }
 525                 else { /* watcher process */
 526                         if (pid_file) {
 527                                 fp = fopen(pid_file, "w");
 528                                 if (fp != NULL) {
 529                                         fprintf(fp, "%d\n", getpid());
 530                                         fclose(fp);
 531                                 }
 532                         }
 533                         waitpid(current_child, &status, 0);
 534                 }
 535
 536                 do_restart = 0;
 537
 538                 /* Did the main process exit with an actual exit code? */
 539                 if (WIFEXITED(status)) {
 540
 541                         /* Exit code 0 means the watcher should exit */
 542                         if (WEXITSTATUS(status) == 0) {
 543                                 do_restart = 0;
 544                         }
 545
 546                         /* Exit code 101-109 means the watcher should exit */
 547                         else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
 548                                 do_restart = 0;
 549                         }
 550
 551                         /* Any other exit code means we should restart. */
 552                         else {
 553                                 do_restart = 1;
 554                         }
 555                 }
 556
 557                 /* Any other type of termination (signals, etc.) should also restart. */
 558                 else {
 559                         do_restart = 1;
 560                 }
 561
 562         } while (do_restart);
 563
 564         if (pid_file) {
 565                 unlink(pid_file);
 566         }
 567         ShutDownLibCitadel ();
 568         exit(WEXITSTATUS(status));
 569 }
 570
 571 /*
 572  * Spawn an additional worker thread into the pool.
 573  */
 574 void spawn_another_worker_thread()
 575 {
 576         pthread_t SessThread;   /* Thread descriptor */
 577         pthread_attr_t attr;    /* Thread attributes */
 578         int ret;
 579
 580         lprintf(3, "Creating a new thread\n");
 581
 582         /* set attributes for the new thread */
 583         pthread_attr_init(&attr);
 584         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 585
 586         /*
 587          * Our per-thread stacks need to be bigger than the default size, otherwise
 588          * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
 589          * 64-bit Linux.
 590          */
 591         if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
 592                 lprintf(1, "pthread_attr_setstacksize: %s\n",
 593                         strerror(ret));
 594                 pthread_attr_destroy(&attr);
 595         }
 596
 597         /* now create the thread */
 598         if (pthread_create(&SessThread, &attr,
 599                            (void *(*)(void *)) worker_entry, NULL)
 600             != 0) {
 601                 lprintf(1, "Can't create thread: %s\n", strerror(errno));
 602         }
 603
 604         /* free up the attributes */
 605         pthread_attr_destroy(&attr);
 606 }
 607
 608 /* #define DBG_PRINNT_HOOKS_AT_START */
 609 #ifdef DBG_PRINNT_HOOKS_AT_START
 610 const char foobuf[32];
 611 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
 612 #endif
 613 extern int dbg_analyze_msg;
 614 extern int dbg_bactrace_template_errors;
 615 void InitTemplateCache(void);
 616 extern int LoadTemplates;
 617 extern void LoadZoneFiles(void);
 618 StrBuf *csslocal = NULL;
 619 /*
 620  * Here's where it all begins.
 621  */
 622 int main(int argc, char **argv)
 623 {
 624         pthread_t SessThread;           /* Thread descriptor */
 625         pthread_attr_t attr;            /* Thread attributes */
 626         int a, i;                       /* General-purpose variables */
 627         char tracefile[PATH_MAX];
 628         char ip_addr[256]="0.0.0.0";
 629         char dirbuffer[PATH_MAX]="";
 630         int relh=0;
 631         int home=0;
 632         int home_specified=0;
 633         char relhome[PATH_MAX]="";
 634         char webcitdir[PATH_MAX] = DATADIR;
 635         char *pidfile = NULL;
 636         char *hdir;
 637         const char *basedir;
 638 #ifdef ENABLE_NLS
 639         char *locale = NULL;
 640         char *mo = NULL;
 641 #endif /* ENABLE_NLS */
 642         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
 643
 644         WildFireInitBacktrace(argv[0], 2);
 645
 646         HandlerHash = NewHash(1, NULL);
 647         PreferenceHooks = NewHash(1, NULL);
 648         WirelessTemplateCache = NewHash(1, NULL);
 649         WirelessLocalTemplateCache = NewHash(1, NULL);
 650         LocalTemplateCache = NewHash(1, NULL);
 651         TemplateCache = NewHash(1, NULL);
 652         GlobalNS = NewHash(1, NULL);
 653         Iterators = NewHash(1, NULL);
 654         Conditionals = NewHash(1, NULL);
 655         MsgHeaderHandler = NewHash(1, NULL);
 656         MimeRenderHandler = NewHash(1, NULL);
 657         SortHash = NewHash(1, NULL);
 658
 659         LoadZoneFiles();
 660
 661 #ifdef DBG_PRINNT_HOOKS_AT_START
 662         dbg_PrintHash(HandlerHash, nix, NULL);
 663 #endif
 664
 665         /* Ensure that we are linked to the correct version of libcitadel */
 666         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 667                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 668                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 669                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 670                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 671                 return(1);
 672         }
 673
 674         strcpy(uds_listen_path, "");
 675
 676         /* Parse command line */
 677 #ifdef HAVE_OPENSSL
 678         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:cfsZ")) != EOF)
 679 #else
 680         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:cfZ")) != EOF)
 681 #endif
 682                 switch (a) {
 683                 case 'h':
 684                         hdir = strdup(optarg);
 685                         relh=hdir[0]!='/';
 686                         if (!relh) safestrncpy(webcitdir, hdir,
 687                                                                    sizeof webcitdir);
 688                         else
 689                                 safestrncpy(relhome, relhome,
 690                                                         sizeof relhome);
 691                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 692                         home_specified = 1;
 693                         home=1;
 694                         break;
 695                 case 'd':
 696                         running_as_daemon = 1;
 697                         break;
 698                 case 'D':
 699                         pidfile = strdup(optarg);
 700                         running_as_daemon = 1;
 701                         break;
 702                 case 'i':
 703                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 704                         break;
 705                 case 'p':
 706                         http_port = atoi(optarg);
 707                         if (http_port == 0) {
 708                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 709                         }
 710                         break;
 711                 case 't':
 712                         safestrncpy(tracefile, optarg, sizeof tracefile);
 713                         freopen(tracefile, "w", stdout);
 714                         freopen(tracefile, "w", stderr);
 715                         freopen(tracefile, "r", stdin);
 716                         break;
 717                 case 'T':
 718                         LoadTemplates = atoi(optarg);
 719                         dbg_analyze_msg = (LoadTemplates && (1<<1)) != 0;
 720                         dbg_bactrace_template_errors = (LoadTemplates && (1<<2)) != 0;
 721                         break;
 722                 case 'Z':
 723                         DisableGzip = 1;
 724                         break;
 725                 case 'x':
 726                         verbosity = atoi(optarg);
 727                         break;
 728                 case 'f':
 729                         follow_xff = 1;
 730                         break;
 731                 case 'c':
 732                         server_cookie = malloc(256);
 733                         if (server_cookie != NULL) {
 734                                 safestrncpy(server_cookie,
 735                                        "Set-cookie: wcserver=",
 736                                         256);
 737                                 if (gethostname
 738                                     (&server_cookie[strlen(server_cookie)],
 739                                      200) != 0) {
 740                                         lprintf(2, "gethostname: %s\n",
 741                                                 strerror(errno));
 742                                         free(server_cookie);
 743                                 }
 744                         }
 745                         break;
 746                 case 's':
 747                         is_https = 1;
 748                         break;
 749                 default:
 750                         fprintf(stderr, "usage: webcit "
 751                                 "[-i ip_addr] [-p http_port] "
 752                                 "[-t tracefile] [-c] [-f] "
 753                                 "[-T Templatedebuglevel] "
 754                                 "[-d] [-Z] "
 755 #ifdef HAVE_OPENSSL
 756                                 "[-s] "
 757 #endif
 758                                 "[remotehost [remoteport]]\n");
 759                         return 1;
 760                 }
 761
 762         if (optind < argc) {
 763                 ctdlhost = argv[optind];
 764                 if (++optind < argc)
 765                         ctdlport = argv[optind];
 766         }
 767
 768         /* daemonize, if we were asked to */
 769         if (running_as_daemon) {
 770                 start_daemon(pidfile);
 771         }
 772         else {
 773                 signal(SIGHUP, graceful_shutdown);
 774         }
 775
 776         /* Tell 'em who's in da house */
 777         lprintf(1, PACKAGE_STRING "\n");
 778         lprintf(1, "Copyright (C) 1996-2009 by the Citadel development team.\n"
 779                 "This software is distributed under the terms of the "
 780                 "GNU General Public License.\n\n"
 781         );
 782
 783
 784         /* initialize the International Bright Young Thing */
 785 #ifdef ENABLE_NLS
 786         initialize_locales();
 787
 788         locale = setlocale(LC_ALL, "");
 789
 790         mo = malloc(strlen(webcitdir) + 20);
 791         lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
 792         free(mo);
 793         lprintf(9, "Text domain: %s\n", textdomain("webcit"));
 794         lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
 795         preset_locale();
 796 #endif
 797
 798
 799         /* calculate all our path on a central place */
 800     /* where to keep our config */
 801
 802 #define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
 803         snprintf(SUBDIR,sizeof SUBDIR,  "%s%s%s%s%s%s%s", \
 804                          (home&!relh)?webcitdir:basedir, \
 805              ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
 806              ((basedir!=webcitdir)&(home&!relh))?"/":"", \
 807                          relhome, \
 808              (relhome[0]!='\0')?"/":"",\
 809                          dirbuffer,\
 810                          (dirbuffer[0]!='\0')?"/":"");
 811         basedir=RUNDIR;
 812         COMPUTE_DIRECTORY(socket_dir);
 813         basedir=WWWDIR "/static";
 814         COMPUTE_DIRECTORY(static_dir);
 815         basedir=WWWDIR "/static/icons";
 816         COMPUTE_DIRECTORY(static_icon_dir);
 817         basedir=WWWDIR "/static.local";
 818         COMPUTE_DIRECTORY(static_local_dir);
 819
 820         snprintf(file_crpt_file_key,
 821                  sizeof file_crpt_file_key,
 822                  "%s/citadel.key",
 823                  ctdl_key_dir);
 824         snprintf(file_crpt_file_csr,
 825                  sizeof file_crpt_file_csr,
 826                  "%s/citadel.csr",
 827                  ctdl_key_dir);
 828         snprintf(file_crpt_file_cer,
 829                  sizeof file_crpt_file_cer,
 830                  "%s/citadel.cer",
 831                  ctdl_key_dir);
 832
 833         /* we should go somewhere we can leave our coredump, if enabled... */
 834         lprintf(9, "Changing directory to %s\n", socket_dir);
 835         if (chdir(webcitdir) != 0) {
 836                 perror("chdir");
 837         }
 838         LoadIconDir(static_icon_dir);
 839
 840         initialise_modules();
 841         initialize_viewdefs();
 842         initialize_axdefs();
 843
 844         InitTemplateCache();
 845
 846         if (!access("static.local/webcit.css", R_OK)) {
 847                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"));
 848         }
 849
 850         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 851         icalerror_errors_are_fatal = 0;
 852
 853         /* Use our own prefix on tzid's generated from system tzdata */
 854         icaltimezone_set_tzid_prefix("/citadel.org/");
 855
 856         /*
 857          * Set up a place to put thread-specific data.
 858          * We only need a single pointer per thread - it points to the
 859          * wcsession struct to which the thread is currently bound.
 860          */
 861         if (pthread_key_create(&MyConKey, NULL) != 0) {
 862                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 863         }
 864         InitialiseSemaphores ();
 865
 866         /*
 867          * Set up a place to put thread-specific SSL data.
 868          * We don't stick this in the wcsession struct because SSL starts
 869          * up before the session is bound, and it gets torn down between
 870          * transactions.
 871          */
 872 #ifdef HAVE_OPENSSL
 873         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 874                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 875         }
 876 #endif
 877
 878         /*
 879          * Bind the server to our favorite port.
 880          * There is no need to check for errors, because ig_tcp_server()
 881          * exits if it doesn't succeed.
 882          */
 883
 884         if (!IsEmptyStr(uds_listen_path)) {
 885                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 886                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 887         }
 888         else {
 889                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 890                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 891         }
 892
 893         lprintf(2, "Listening on socket %d\n", msock);
 894         signal(SIGPIPE, SIG_IGN);
 895
 896         pthread_mutex_init(&SessionListMutex, NULL);
 897
 898         /*
 899          * Start up the housekeeping thread
 900          */
 901         pthread_attr_init(&attr);
 902         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 903         pthread_create(&SessThread, &attr,
 904                        (void *(*)(void *)) housekeeping_loop, NULL);
 905
 906
 907         /*
 908          * If this is an HTTPS server, fire up SSL
 909          */
 910 #ifdef HAVE_OPENSSL
 911         if (is_https) {
 912                 init_ssl();
 913         }
 914 #endif
 915
 916         /* Start a few initial worker threads */
 917         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 918                 spawn_another_worker_thread();
 919         }
 920
 921         /* now the original thread becomes another worker */
 922         worker_entry();
 923         ShutDownLibCitadel ();
 924         DeleteHash(&HandlerHash);
 925         DeleteHash(&PreferenceHooks);
 926         return 0;
 927 }
 928
 929
 930 void ShutDownWebcit(void)
 931 {
 932         DeleteHash(&ZoneHash);
 933         free_zone_directory ();
 934         icaltimezone_release_zone_tab ();
 935         icalmemory_free_ring ();
 936         ShutDownLibCitadel ();
 937         DeleteHash(&HandlerHash);
 938         DeleteHash(&PreferenceHooks);
 939         DeleteHash(&GlobalNS);
 940         DeleteHash(&WirelessTemplateCache);
 941         DeleteHash(&WirelessLocalTemplateCache);
 942         DeleteHash(&TemplateCache);
 943         DeleteHash(&LocalTemplateCache);
 944         DeleteHash(&Iterators);
 945         DeleteHash(&MimeRenderHandler);
 946         DeleteHash(&Conditionals);
 947         DeleteHash(&MsgHeaderHandler);
 948         DeleteHash(&SortHash);
 949 #ifdef ENABLE_NLS
 950         ShutdownLocale();
 951 #endif
 952 #ifdef HAVE_OPENSSL
 953         if (is_https) {
 954                 shutdown_ssl();
 955         }
 956 #endif
 957 }
 958
 959 /*
 960  * Entry point for worker threads
 961  */
 962 void worker_entry(void)
 963 {
 964         int ssock;
 965         int i = 0;
 966         int fail_this_transaction = 0;
 967         int ret;
 968         struct timeval tv;
 969         fd_set readset, tempset;
 970
 971         tv.tv_sec = 0;
 972         tv.tv_usec = 10000;
 973         FD_ZERO(&readset);
 974         FD_SET(msock, &readset);
 975
 976         do {
 977                 /* Only one thread can accept at a time */
 978                 fail_this_transaction = 0;
 979                 ssock = -1;
 980                 errno = EAGAIN;
 981                 do {
 982                         ret = -1; /* just one at once should select... */
 983                         begin_critical_section(S_SELECT);
 984
 985                         FD_ZERO(&tempset);
 986                         if (msock > 0) FD_SET(msock, &tempset);
 987                         tv.tv_sec = 0;
 988                         tv.tv_usec = 10000;
 989                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
 990                         end_critical_section(S_SELECT);
 991                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
 992                         {/* EINTR and EAGAIN are thrown but not of interest. */
 993                                 lprintf(2, "accept() failed:%d %s\n",
 994                                         errno, strerror(errno));
 995                         }
 996                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
 997                         {/* Successfully selected, and still not shutting down? Accept! */
 998                                 ssock = accept(msock, NULL, 0);
 999                         }
1000
1001                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
1002
1003                 if ((msock == -1)||(time_to_die))
1004                 {/* ok, we're going down. */
1005                         int shutdown = 0;
1006
1007                         /* the first to come here will have to do the cleanup.
1008                          * make shure its realy just one.
1009                          */
1010                         begin_critical_section(S_SHUTDOWN);
1011                         if (msock == -1)
1012                         {
1013                                 msock = -2;
1014                                 shutdown = 1;
1015                         }
1016                         end_critical_section(S_SHUTDOWN);
1017                         if (shutdown == 1)
1018                         {/* we're the one to cleanup the mess. */
1019                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
1020                                 shutdown_sessions();
1021                                 lprintf(2, "master shutdown: waiting for others\n");
1022                                 sleeeeeeeeeep(1); /* wait so some others might finish... */
1023                                 lprintf(2, "master shutdown: cleaning up sessions\n");
1024                                 do_housekeeping();
1025                                 lprintf(2, "master shutdown: cleaning up libical\n");
1026
1027                                 ShutDownWebcit();
1028
1029                                 lprintf(2, "master shutdown exiting!.\n");
1030                                 exit(0);
1031                         }
1032                         break;
1033                 }
1034                 if (ssock < 0 ) continue;
1035
1036                 if (msock < 0) {
1037                         if (ssock > 0) close (ssock);
1038                         lprintf(2, "inbetween.");
1039                         pthread_exit(NULL);
1040                 } else { /* Got it? do some real work! */
1041                         /* Set the SO_REUSEADDR socket option */
1042                         i = 1;
1043                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
1044                                    &i, sizeof(i));
1045
1046                         /* If we are an HTTPS server, go crypto now. */
1047 #ifdef HAVE_OPENSSL
1048                         if (is_https) {
1049                                 if (starttls(ssock) != 0) {
1050                                         fail_this_transaction = 1;
1051                                         close(ssock);
1052                                 }
1053                         }
1054 #endif
1055
1056                         if (fail_this_transaction == 0) {
1057
1058                                 /* Perform an HTTP transaction... */
1059                                 context_loop(&ssock);
1060
1061                                 /* Shut down SSL/TLS if required... */
1062 #ifdef HAVE_OPENSSL
1063                                 if (is_https) {
1064                                         endtls();
1065                                 }
1066 #endif
1067
1068                                 /* ...and close the socket. */
1069                                 if (ssock > 0)
1070                                         lingering_close(ssock);
1071                         }
1072
1073                 }
1074
1075         } while (!time_to_die);
1076
1077         lprintf (1, "bye\n");
1078         pthread_exit(NULL);
1079 }
1080
1081 /*
1082  * print log messages
1083  * logs to stderr if loglevel is lower than the verbosity set at startup
1084  *
1085  * loglevel     level of the message
1086  * format       the printf like format string
1087  * ...          the strings to put into format
1088  */
1089 int lprintf(int loglevel, const char *format, ...)
1090 {
1091         va_list ap;
1092
1093         if (loglevel <= verbosity) {
1094                 va_start(ap, format);
1095                 vfprintf(stderr, format, ap);
1096                 va_end(ap);
1097                 fflush(stderr);
1098         }
1099         return 1;
1100 }
1101
1102
1103 /*
1104  * print the actual stack frame.
1105  */
1106 void wc_backtrace(void)
1107 {
1108 #ifdef HAVE_BACKTRACE
1109         void *stack_frames[50];
1110         size_t size, i;
1111         char **strings;
1112
1113
1114         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
1115         strings = backtrace_symbols(stack_frames, size);
1116         for (i = 0; i < size; i++) {
1117                 if (strings != NULL)
1118                         lprintf(1, "%s\n", strings[i]);
1119                 else
1120                         lprintf(1, "%p\n", stack_frames[i]);
1121         }
1122         free(strings);
1123 #endif
1124 }
1125