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 extern int DumpTemplateI18NStrings;
 616 extern StrBuf *I18nDump;
 617 void InitTemplateCache(void);
 618 extern int LoadTemplates;
 619 extern void LoadZoneFiles(void);
 620 StrBuf *csslocal = NULL;
 621 /*
 622  * Here's where it all begins.
 623  */
 624 int main(int argc, char **argv)
 625 {
 626         pthread_t SessThread;           /* Thread descriptor */
 627         pthread_attr_t attr;            /* Thread attributes */
 628         int a, i;                       /* General-purpose variables */
 629         char tracefile[PATH_MAX];
 630         char ip_addr[256]="0.0.0.0";
 631         char dirbuffer[PATH_MAX]="";
 632         int relh=0;
 633         int home=0;
 634         int home_specified=0;
 635         char relhome[PATH_MAX]="";
 636         char webcitdir[PATH_MAX] = DATADIR;
 637         char *pidfile = NULL;
 638         char *hdir;
 639         const char *basedir;
 640 #ifdef ENABLE_NLS
 641         char *locale = NULL;
 642         char *mo = NULL;
 643 #endif /* ENABLE_NLS */
 644         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
 645         const char *I18nDumpFile;
 646
 647         WildFireInitBacktrace(argv[0], 2);
 648
 649         HandlerHash = NewHash(1, NULL);
 650         PreferenceHooks = NewHash(1, NULL);
 651         WirelessTemplateCache = NewHash(1, NULL);
 652         WirelessLocalTemplateCache = NewHash(1, NULL);
 653         LocalTemplateCache = NewHash(1, NULL);
 654         TemplateCache = NewHash(1, NULL);
 655         GlobalNS = NewHash(1, NULL);
 656         Iterators = NewHash(1, NULL);
 657         Conditionals = NewHash(1, NULL);
 658         MsgHeaderHandler = NewHash(1, NULL);
 659         MimeRenderHandler = NewHash(1, NULL);
 660         SortHash = NewHash(1, NULL);
 661
 662         LoadZoneFiles();
 663
 664 #ifdef DBG_PRINNT_HOOKS_AT_START
 665         dbg_PrintHash(HandlerHash, nix, NULL);
 666 #endif
 667
 668         /* Ensure that we are linked to the correct version of libcitadel */
 669         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 670                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 671                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 672                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 673                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 674                 return(1);
 675         }
 676
 677         strcpy(uds_listen_path, "");
 678
 679         /* Parse command line */
 680 #ifdef HAVE_OPENSSL
 681         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:G:cfsZ")) != EOF)
 682 #else
 683         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:G:cfZ")) != EOF)
 684 #endif
 685                 switch (a) {
 686                 case 'h':
 687                         hdir = strdup(optarg);
 688                         relh=hdir[0]!='/';
 689                         if (!relh) safestrncpy(webcitdir, hdir,
 690                                                                    sizeof webcitdir);
 691                         else
 692                                 safestrncpy(relhome, relhome,
 693                                                         sizeof relhome);
 694                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 695                         home_specified = 1;
 696                         home=1;
 697                         break;
 698                 case 'd':
 699                         running_as_daemon = 1;
 700                         break;
 701                 case 'D':
 702                         pidfile = strdup(optarg);
 703                         running_as_daemon = 1;
 704                         break;
 705                 case 'i':
 706                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 707                         break;
 708                 case 'p':
 709                         http_port = atoi(optarg);
 710                         if (http_port == 0) {
 711                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 712                         }
 713                         break;
 714                 case 't':
 715                         safestrncpy(tracefile, optarg, sizeof tracefile);
 716                         freopen(tracefile, "w", stdout);
 717                         freopen(tracefile, "w", stderr);
 718                         freopen(tracefile, "r", stdin);
 719                         break;
 720                 case 'T':
 721                         LoadTemplates = atoi(optarg);
 722                         dbg_analyze_msg = (LoadTemplates && (1<<1)) != 0;
 723                         dbg_bactrace_template_errors = (LoadTemplates && (1<<2)) != 0;
 724                         break;
 725                 case 'Z':
 726                         DisableGzip = 1;
 727                         break;
 728                 case 'x':
 729                         verbosity = atoi(optarg);
 730                         break;
 731                 case 'f':
 732                         follow_xff = 1;
 733                         break;
 734                 case 'c':
 735                         server_cookie = malloc(256);
 736                         if (server_cookie != NULL) {
 737                                 safestrncpy(server_cookie,
 738                                        "Set-cookie: wcserver=",
 739                                         256);
 740                                 if (gethostname
 741                                     (&server_cookie[strlen(server_cookie)],
 742                                      200) != 0) {
 743                                         lprintf(2, "gethostname: %s\n",
 744                                                 strerror(errno));
 745                                         free(server_cookie);
 746                                 }
 747                         }
 748                         break;
 749                 case 's':
 750                         is_https = 1;
 751                         break;
 752                 case 'G':
 753                         DumpTemplateI18NStrings = 1;
 754                         I18nDump = NewStrBufPlain(HKEY("int templatestrings(void)\n{\n"));
 755                         I18nDumpFile = optarg;
 756                         break;
 757                 default:
 758                         fprintf(stderr, "usage: webcit "
 759                                 "[-i ip_addr] [-p http_port] "
 760                                 "[-t tracefile] [-c] [-f] "
 761                                 "[-T Templatedebuglevel] "
 762                                 "[-d] [-Z] [-G i18ndumpfile] "
 763 #ifdef HAVE_OPENSSL
 764                                 "[-s] "
 765 #endif
 766                                 "[remotehost [remoteport]]\n");
 767                         return 1;
 768                 }
 769
 770         if (optind < argc) {
 771                 ctdlhost = argv[optind];
 772                 if (++optind < argc)
 773                         ctdlport = argv[optind];
 774         }
 775
 776         /* daemonize, if we were asked to */
 777         if (!DumpTemplateI18NStrings && running_as_daemon) {
 778                 start_daemon(pidfile);
 779         }
 780         else {
 781                 signal(SIGHUP, graceful_shutdown);
 782         }
 783
 784         /* Tell 'em who's in da house */
 785         lprintf(1, PACKAGE_STRING "\n");
 786         lprintf(1, "Copyright (C) 1996-2009 by the Citadel development team.\n"
 787                 "This software is distributed under the terms of the "
 788                 "GNU General Public License.\n\n"
 789         );
 790
 791
 792         /* initialize the International Bright Young Thing */
 793 #ifdef ENABLE_NLS
 794         initialize_locales();
 795
 796
 797         locale = setlocale(LC_ALL, "");
 798
 799         mo = malloc(strlen(webcitdir) + 20);
 800         lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
 801         free(mo);
 802         lprintf(9, "Text domain: %s\n", textdomain("webcit"));
 803         lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
 804         preset_locale();
 805 #endif
 806
 807
 808         /* calculate all our path on a central place */
 809     /* where to keep our config */
 810
 811 #define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
 812         snprintf(SUBDIR,sizeof SUBDIR,  "%s%s%s%s%s%s%s", \
 813                          (home&!relh)?webcitdir:basedir, \
 814              ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
 815              ((basedir!=webcitdir)&(home&!relh))?"/":"", \
 816                          relhome, \
 817              (relhome[0]!='\0')?"/":"",\
 818                          dirbuffer,\
 819                          (dirbuffer[0]!='\0')?"/":"");
 820         basedir=RUNDIR;
 821         COMPUTE_DIRECTORY(socket_dir);
 822         basedir=WWWDIR "/static";
 823         COMPUTE_DIRECTORY(static_dir);
 824         basedir=WWWDIR "/static/icons";
 825         COMPUTE_DIRECTORY(static_icon_dir);
 826         basedir=WWWDIR "/static.local";
 827         COMPUTE_DIRECTORY(static_local_dir);
 828
 829         snprintf(file_crpt_file_key,
 830                  sizeof file_crpt_file_key,
 831                  "%s/citadel.key",
 832                  ctdl_key_dir);
 833         snprintf(file_crpt_file_csr,
 834                  sizeof file_crpt_file_csr,
 835                  "%s/citadel.csr",
 836                  ctdl_key_dir);
 837         snprintf(file_crpt_file_cer,
 838                  sizeof file_crpt_file_cer,
 839                  "%s/citadel.cer",
 840                  ctdl_key_dir);
 841
 842         /* we should go somewhere we can leave our coredump, if enabled... */
 843         lprintf(9, "Changing directory to %s\n", socket_dir);
 844         if (chdir(webcitdir) != 0) {
 845                 perror("chdir");
 846         }
 847         LoadIconDir(static_icon_dir);
 848
 849         initialise_modules();
 850         initialize_viewdefs();
 851         initialize_axdefs();
 852
 853         InitTemplateCache();
 854         if (DumpTemplateI18NStrings) {
 855                 FILE *fd;
 856                 StrBufAppendBufPlain(I18nDump, HKEY("}\n"), 0);
 857                 if (StrLength(I18nDump) < 50) {
 858                         lprintf(1, "********************************************************************************\n");
 859                         lprintf(1, "*        No strings found in templates! are you shure they're there?           *\n");
 860                         lprintf(1, "********************************************************************************\n");
 861                         return -1;
 862                 }
 863                 fd = fopen(I18nDumpFile, "w");
 864                 if (fd == NULL) {
 865                         lprintf(1, "********************************************************************************\n");
 866                         lprintf(1, "*                  unable to open I18N dumpfile [%s]         *\n", I18nDumpFile);
 867                         lprintf(1, "********************************************************************************\n");
 868                         return -1;
 869                 }
 870                 fwrite(ChrPtr(I18nDump), 1, StrLength(I18nDump), fd);
 871                 fclose(fd);
 872                 return 0;
 873         }
 874
 875         if (!access("static.local/webcit.css", R_OK)) {
 876                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"));
 877         }
 878
 879         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 880         icalerror_errors_are_fatal = 0;
 881
 882         /* Use our own prefix on tzid's generated from system tzdata */
 883         icaltimezone_set_tzid_prefix("/citadel.org/");
 884
 885         /*
 886          * Set up a place to put thread-specific data.
 887          * We only need a single pointer per thread - it points to the
 888          * wcsession struct to which the thread is currently bound.
 889          */
 890         if (pthread_key_create(&MyConKey, NULL) != 0) {
 891                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 892         }
 893         InitialiseSemaphores ();
 894
 895         /*
 896          * Set up a place to put thread-specific SSL data.
 897          * We don't stick this in the wcsession struct because SSL starts
 898          * up before the session is bound, and it gets torn down between
 899          * transactions.
 900          */
 901 #ifdef HAVE_OPENSSL
 902         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 903                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 904         }
 905 #endif
 906
 907         /*
 908          * Bind the server to our favorite port.
 909          * There is no need to check for errors, because ig_tcp_server()
 910          * exits if it doesn't succeed.
 911          */
 912
 913         if (!IsEmptyStr(uds_listen_path)) {
 914                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 915                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 916         }
 917         else {
 918                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 919                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 920         }
 921
 922         lprintf(2, "Listening on socket %d\n", msock);
 923         signal(SIGPIPE, SIG_IGN);
 924
 925         pthread_mutex_init(&SessionListMutex, NULL);
 926
 927         /*
 928          * Start up the housekeeping thread
 929          */
 930         pthread_attr_init(&attr);
 931         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 932         pthread_create(&SessThread, &attr,
 933                        (void *(*)(void *)) housekeeping_loop, NULL);
 934
 935
 936         /*
 937          * If this is an HTTPS server, fire up SSL
 938          */
 939 #ifdef HAVE_OPENSSL
 940         if (is_https) {
 941                 init_ssl();
 942         }
 943 #endif
 944
 945         /* Start a few initial worker threads */
 946         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 947                 spawn_another_worker_thread();
 948         }
 949
 950         /* now the original thread becomes another worker */
 951         worker_entry();
 952         ShutDownLibCitadel ();
 953         DeleteHash(&HandlerHash);
 954         DeleteHash(&PreferenceHooks);
 955         return 0;
 956 }
 957
 958
 959 void ShutDownWebcit(void)
 960 {
 961         DeleteHash(&ZoneHash);
 962         free_zone_directory ();
 963         icaltimezone_release_zone_tab ();
 964         icalmemory_free_ring ();
 965         ShutDownLibCitadel ();
 966         DeleteHash(&HandlerHash);
 967         DeleteHash(&PreferenceHooks);
 968         DeleteHash(&GlobalNS);
 969         DeleteHash(&WirelessTemplateCache);
 970         DeleteHash(&WirelessLocalTemplateCache);
 971         DeleteHash(&TemplateCache);
 972         DeleteHash(&LocalTemplateCache);
 973         DeleteHash(&Iterators);
 974         DeleteHash(&MimeRenderHandler);
 975         DeleteHash(&Conditionals);
 976         DeleteHash(&MsgHeaderHandler);
 977         DeleteHash(&SortHash);
 978 #ifdef ENABLE_NLS
 979         ShutdownLocale();
 980 #endif
 981 #ifdef HAVE_OPENSSL
 982         if (is_https) {
 983                 shutdown_ssl();
 984         }
 985 #endif
 986 }
 987
 988 /*
 989  * Entry point for worker threads
 990  */
 991 void worker_entry(void)
 992 {
 993         int ssock;
 994         int i = 0;
 995         int fail_this_transaction = 0;
 996         int ret;
 997         struct timeval tv;
 998         fd_set readset, tempset;
 999
1000         tv.tv_sec = 0;
1001         tv.tv_usec = 10000;
1002         FD_ZERO(&readset);
1003         FD_SET(msock, &readset);
1004
1005         do {
1006                 /* Only one thread can accept at a time */
1007                 fail_this_transaction = 0;
1008                 ssock = -1;
1009                 errno = EAGAIN;
1010                 do {
1011                         ret = -1; /* just one at once should select... */
1012                         begin_critical_section(S_SELECT);
1013
1014                         FD_ZERO(&tempset);
1015                         if (msock > 0) FD_SET(msock, &tempset);
1016                         tv.tv_sec = 0;
1017                         tv.tv_usec = 10000;
1018                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
1019                         end_critical_section(S_SELECT);
1020                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
1021                         {/* EINTR and EAGAIN are thrown but not of interest. */
1022                                 lprintf(2, "accept() failed:%d %s\n",
1023                                         errno, strerror(errno));
1024                         }
1025                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
1026                         {/* Successfully selected, and still not shutting down? Accept! */
1027                                 ssock = accept(msock, NULL, 0);
1028                         }
1029
1030                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
1031
1032                 if ((msock == -1)||(time_to_die))
1033                 {/* ok, we're going down. */
1034                         int shutdown = 0;
1035
1036                         /* the first to come here will have to do the cleanup.
1037                          * make shure its realy just one.
1038                          */
1039                         begin_critical_section(S_SHUTDOWN);
1040                         if (msock == -1)
1041                         {
1042                                 msock = -2;
1043                                 shutdown = 1;
1044                         }
1045                         end_critical_section(S_SHUTDOWN);
1046                         if (shutdown == 1)
1047                         {/* we're the one to cleanup the mess. */
1048                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
1049                                 shutdown_sessions();
1050                                 lprintf(2, "master shutdown: waiting for others\n");
1051                                 sleeeeeeeeeep(1); /* wait so some others might finish... */
1052                                 lprintf(2, "master shutdown: cleaning up sessions\n");
1053                                 do_housekeeping();
1054                                 lprintf(2, "master shutdown: cleaning up libical\n");
1055
1056                                 ShutDownWebcit();
1057
1058                                 lprintf(2, "master shutdown exiting!.\n");
1059                                 exit(0);
1060                         }
1061                         break;
1062                 }
1063                 if (ssock < 0 ) continue;
1064
1065                 if (msock < 0) {
1066                         if (ssock > 0) close (ssock);
1067                         lprintf(2, "inbetween.");
1068                         pthread_exit(NULL);
1069                 } else { /* Got it? do some real work! */
1070                         /* Set the SO_REUSEADDR socket option */
1071                         i = 1;
1072                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
1073                                    &i, sizeof(i));
1074
1075                         /* If we are an HTTPS server, go crypto now. */
1076 #ifdef HAVE_OPENSSL
1077                         if (is_https) {
1078                                 if (starttls(ssock) != 0) {
1079                                         fail_this_transaction = 1;
1080                                         close(ssock);
1081                                 }
1082                         }
1083 #endif
1084
1085                         if (fail_this_transaction == 0) {
1086
1087                                 /* Perform an HTTP transaction... */
1088                                 context_loop(&ssock);
1089
1090                                 /* Shut down SSL/TLS if required... */
1091 #ifdef HAVE_OPENSSL
1092                                 if (is_https) {
1093                                         endtls();
1094                                 }
1095 #endif
1096
1097                                 /* ...and close the socket. */
1098                                 if (ssock > 0)
1099                                         lingering_close(ssock);
1100                         }
1101
1102                 }
1103
1104         } while (!time_to_die);
1105
1106         lprintf (1, "bye\n");
1107         pthread_exit(NULL);
1108 }
1109
1110 /*
1111  * print log messages
1112  * logs to stderr if loglevel is lower than the verbosity set at startup
1113  *
1114  * loglevel     level of the message
1115  * format       the printf like format string
1116  * ...          the strings to put into format
1117  */
1118 int lprintf(int loglevel, const char *format, ...)
1119 {
1120         va_list ap;
1121
1122         if (loglevel <= verbosity) {
1123                 va_start(ap, format);
1124                 vfprintf(stderr, format, ap);
1125                 va_end(ap);
1126                 fflush(stderr);
1127         }
1128         return 1;
1129 }
1130
1131
1132 /*
1133  * print the actual stack frame.
1134  */
1135 void wc_backtrace(void)
1136 {
1137 #ifdef HAVE_BACKTRACE
1138         void *stack_frames[50];
1139         size_t size, i;
1140         char **strings;
1141
1142
1143         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
1144         strings = backtrace_symbols(stack_frames, size);
1145         for (i = 0; i < size; i++) {
1146                 if (strings != NULL)
1147                         lprintf(1, "%s\n", strings[i]);
1148                 else
1149                         lprintf(1, "%p\n", stack_frames[i]);
1150         }
1151         free(strings);
1152 #endif
1153 }
1154