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, const char **Pos, int bytes, int timeout)
 203 {
 204         const char *Error;
 205         int retval = 0;
 206
 207 #ifdef HAVE_OPENSSL
 208         if (is_https) {
 209                 long bufremain = StrLength(Buf) - (*Pos - ChrPtr(Buf));
 210                 StrBufAppendBufPlain(Target, *Pos, bufremain, 0);
 211                 *Pos = NULL;
 212                 FlushStrBuf(Buf);
 213
 214                 while ((StrLength(Buf) + StrLength(Target) < bytes) &&
 215                        (retval >= 0))
 216                         retval = client_read_sslbuffer(Buf, timeout);
 217                 if (retval >= 0) {
 218                         StrBufAppendBuf(Target, Buf, 0); /* todo: Buf > bytes? */
 219 #ifdef HTTP_TRACING
 220                         write(2, "\033[32m", 5);
 221                         write(2, buf, bytes);
 222                         write(2, "\033[30m", 5);
 223 #endif
 224                         return 1;
 225                 }
 226                 else {
 227                         lprintf(2, "client_read_ssl() failed\n");
 228                         return -1;
 229                 }
 230         }
 231 #endif
 232
 233         retval = StrBufReadBLOBBuffered(Target,
 234                                         Buf, Pos,
 235                                         sock,
 236                                         1,
 237                                         bytes,
 238                                         &Error);
 239         if (retval < 0) {
 240                 lprintf(2, "client_read() failed: %s\n",
 241                         Error);
 242                 return retval;
 243         }
 244
 245 #ifdef HTTP_TRACING
 246         write(2, "\033[32m", 5);
 247         write(2, buf, bytes);
 248         write(2, "\033[30m", 5);
 249 #endif
 250         return 1;
 251 }
 252
 253
 254 /*
 255  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 256  */
 257 void begin_burst(void)
 258 {
 259         if (WC->WBuf == NULL) {
 260                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 261         }
 262 }
 263
 264
 265 /*
 266  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 267  */
 268 long end_burst(void)
 269 {
 270         wcsession *WCC = WC;
 271         const char *ptr, *eptr;
 272         long count;
 273         ssize_t res;
 274         fd_set wset;
 275         int fdflags;
 276
 277         //#ifdef HAVE_ZLIB
 278         /* Perform gzip compression, if enabled and supported by client */
 279         if (!DisableGzip && (WCC->gzip_ok) && CompressBuffer(WCC->WBuf))
 280         {
 281                 hprintf("Content-encoding: gzip\r\n");
 282         }
 283         //#endif        /* HAVE_ZLIB */
 284
 285         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 286
 287         ptr = ChrPtr(WCC->HBuf);
 288         count = StrLength(WCC->HBuf);
 289         eptr = ptr + count;
 290
 291 #ifdef HAVE_OPENSSL
 292         if (is_https) {
 293                 client_write_ssl(WCC->HBuf);
 294                 client_write_ssl(WCC->WBuf);
 295                 return (count);
 296         }
 297 #endif
 298
 299
 300 #ifdef HTTP_TRACING
 301
 302         write(2, "\033[34m", 5);
 303         write(2, ptr, StrLength(WCC->WBuf));
 304         write(2, "\033[30m", 5);
 305 #endif
 306         fdflags = fcntl(WC->http_sock, F_GETFL);
 307
 308         while (ptr < eptr) {
 309                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 310                         FD_ZERO(&wset);
 311                         FD_SET(WCC->http_sock, &wset);
 312                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 313                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 314                                 return -1;
 315                         }
 316                 }
 317
 318                 if ((res = write(WCC->http_sock,
 319                                  ptr,
 320                                  count)) == -1) {
 321                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 322                         wc_backtrace();
 323                         return res;
 324                 }
 325                 count -= res;
 326                 ptr += res;
 327         }
 328
 329         ptr = ChrPtr(WCC->WBuf);
 330         count = StrLength(WCC->WBuf);
 331         eptr = ptr + count;
 332
 333 #ifdef HTTP_TRACING
 334
 335         write(2, "\033[34m", 5);
 336         write(2, ptr, StrLength(WCC->WBuf));
 337         write(2, "\033[30m", 5);
 338 #endif
 339
 340         while (ptr < eptr) {
 341                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 342                         FD_ZERO(&wset);
 343                         FD_SET(WCC->http_sock, &wset);
 344                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 345                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 346                                 return -1;
 347                         }
 348                 }
 349
 350                 if ((res = write(WCC->http_sock,
 351                                  ptr,
 352                                  count)) == -1) {
 353                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 354                         wc_backtrace();
 355                         return res;
 356                 }
 357                 count -= res;
 358                 ptr += res;
 359         }
 360
 361         return StrLength(WCC->WBuf);
 362 }
 363
 364
 365 /*
 366  * Shut us down the regular way.
 367  * signum is the signal we want to forward
 368  */
 369 pid_t current_child;
 370 void graceful_shutdown_watcher(int signum) {
 371         lprintf (1, "bye; shutting down watcher.");
 372         kill(current_child, signum);
 373         if (signum != SIGHUP)
 374                 exit(0);
 375 }
 376
 377
 378 int ClientGetLine(int *sock, StrBuf *Target, StrBuf *CLineBuf, const char **Pos)
 379 {
 380         const char *Error, *pch, *pchs;
 381         int rlen, len, retval = 0;
 382
 383 #ifdef HAVE_OPENSSL
 384         if (is_https) {
 385                 int ntries = 0;
 386                 if (StrLength(CLineBuf) > 0) {
 387                         pchs = ChrPtr(CLineBuf);
 388                         pch = strchr(pchs, '\n');
 389                         if (pch != NULL) {
 390                                 rlen = 0;
 391                                 len = pch - pchs;
 392                                 if (len > 0 && (*(pch - 1) == '\r') )
 393                                         rlen ++;
 394                                 StrBufSub(Target, CLineBuf, 0, len - rlen);
 395                                 StrBufCutLeft(CLineBuf, len + 1);
 396                                 return len - rlen;
 397                         }
 398                 }
 399
 400                 while (retval == 0) {
 401                                 pch = NULL;
 402                                 pchs = ChrPtr(CLineBuf);
 403                                 if (*pchs != '\0')
 404                                         pch = strchr(pchs, '\n');
 405                                 if (pch == NULL) {
 406                                         retval = client_read_sslbuffer(CLineBuf, SLEEPING);
 407                                         pchs = ChrPtr(CLineBuf);
 408                                         pch = strchr(pchs, '\n');
 409                                 }
 410                                 if (retval == 0) {
 411                                         sleeeeeeeeeep(1);
 412                                         ntries ++;
 413                                 }
 414                                 if (ntries > 10)
 415                                         return 0;
 416                 }
 417                 if ((retval > 0) && (pch != NULL)) {
 418                         rlen = 0;
 419                         len = pch - pchs;
 420                         if (len > 0 && (*(pch - 1) == '\r') )
 421                                 rlen ++;
 422                         StrBufSub(Target, CLineBuf, 0, len - rlen);
 423                         StrBufCutLeft(CLineBuf, len + 1);
 424                         return len - rlen;
 425
 426                 }
 427                 else
 428                         return -1;
 429         }
 430         else
 431 #endif
 432                 return StrBufTCP_read_buffered_line_fast(Target,
 433                                                          CLineBuf,
 434                                                          Pos,
 435                                                          sock,
 436                                                          5,
 437                                                          1,
 438                                                          &Error);
 439 }
 440
 441
 442
 443 /*
 444  * Shut us down the regular way.
 445  * signum is the signal we want to forward
 446  */
 447 pid_t current_child;
 448 void graceful_shutdown(int signum) {
 449         char wd[SIZ];
 450         FILE *FD;
 451         int fd;
 452         getcwd(wd, SIZ);
 453         lprintf (1, "bye going down gracefull.[%d][%s]\n", signum, wd);
 454         fd = msock;
 455         msock = -1;
 456         time_to_die = 1;
 457         FD=fdopen(fd, "a+");
 458         fflush (FD);
 459         fclose (FD);
 460         close(fd);
 461 }
 462
 463
 464 /*
 465  * Start running as a daemon.
 466  */
 467 void start_daemon(char *pid_file)
 468 {
 469         int status = 0;
 470         pid_t child = 0;
 471         FILE *fp;
 472         int do_restart = 0;
 473
 474         current_child = 0;
 475
 476         /* Close stdin/stdout/stderr and replace them with /dev/null.
 477          * We don't just call close() because we don't want these fd's
 478          * to be reused for other files.
 479          */
 480         chdir("/");
 481
 482         signal(SIGHUP, SIG_IGN);
 483         signal(SIGINT, SIG_IGN);
 484         signal(SIGQUIT, SIG_IGN);
 485
 486         child = fork();
 487         if (child != 0) {
 488                 exit(0);
 489         }
 490
 491         setsid();
 492         umask(0);
 493         freopen("/dev/null", "r", stdin);
 494         freopen("/dev/null", "w", stdout);
 495         freopen("/dev/null", "w", stderr);
 496         signal(SIGTERM, graceful_shutdown_watcher);
 497         signal(SIGHUP, graceful_shutdown_watcher);
 498
 499         do {
 500                 current_child = fork();
 501
 502
 503                 if (current_child < 0) {
 504                         perror("fork");
 505                         ShutDownLibCitadel ();
 506                         exit(errno);
 507                 }
 508
 509                 else if (current_child == 0) {  /* child process */
 510                         signal(SIGHUP, graceful_shutdown);
 511
 512                         return; /* continue starting webcit. */
 513                 }
 514                 else { /* watcher process */
 515                         if (pid_file) {
 516                                 fp = fopen(pid_file, "w");
 517                                 if (fp != NULL) {
 518                                         fprintf(fp, "%d\n", getpid());
 519                                         fclose(fp);
 520                                 }
 521                         }
 522                         waitpid(current_child, &status, 0);
 523                 }
 524
 525                 do_restart = 0;
 526
 527                 /* Did the main process exit with an actual exit code? */
 528                 if (WIFEXITED(status)) {
 529
 530                         /* Exit code 0 means the watcher should exit */
 531                         if (WEXITSTATUS(status) == 0) {
 532                                 do_restart = 0;
 533                         }
 534
 535                         /* Exit code 101-109 means the watcher should exit */
 536                         else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
 537                                 do_restart = 0;
 538                         }
 539
 540                         /* Any other exit code means we should restart. */
 541                         else {
 542                                 do_restart = 1;
 543                         }
 544                 }
 545
 546                 /* Any other type of termination (signals, etc.) should also restart. */
 547                 else {
 548                         do_restart = 1;
 549                 }
 550
 551         } while (do_restart);
 552
 553         if (pid_file) {
 554                 unlink(pid_file);
 555         }
 556         ShutDownLibCitadel ();
 557         exit(WEXITSTATUS(status));
 558 }
 559
 560 /*
 561  * Spawn an additional worker thread into the pool.
 562  */
 563 void spawn_another_worker_thread()
 564 {
 565         pthread_t SessThread;   /* Thread descriptor */
 566         pthread_attr_t attr;    /* Thread attributes */
 567         int ret;
 568
 569         lprintf(3, "Creating a new thread\n");
 570
 571         /* set attributes for the new thread */
 572         pthread_attr_init(&attr);
 573         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 574
 575         /*
 576          * Our per-thread stacks need to be bigger than the default size, otherwise
 577          * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
 578          * 64-bit Linux.
 579          */
 580         if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
 581                 lprintf(1, "pthread_attr_setstacksize: %s\n",
 582                         strerror(ret));
 583                 pthread_attr_destroy(&attr);
 584         }
 585
 586         /* now create the thread */
 587         if (pthread_create(&SessThread, &attr,
 588                            (void *(*)(void *)) worker_entry, NULL)
 589             != 0) {
 590                 lprintf(1, "Can't create thread: %s\n", strerror(errno));
 591         }
 592
 593         /* free up the attributes */
 594         pthread_attr_destroy(&attr);
 595 }
 596
 597 /* #define DBG_PRINNT_HOOKS_AT_START */
 598 #ifdef DBG_PRINNT_HOOKS_AT_START
 599 const char foobuf[32];
 600 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
 601 #endif
 602 extern int dbg_analyze_msg;
 603 extern int dbg_bactrace_template_errors;
 604 extern int DumpTemplateI18NStrings;
 605 extern StrBuf *I18nDump;
 606 void InitTemplateCache(void);
 607 extern int LoadTemplates;
 608 extern void LoadZoneFiles(void);
 609 StrBuf *csslocal = NULL;
 610 /*
 611  * Here's where it all begins.
 612  */
 613 int main(int argc, char **argv)
 614 {
 615         pthread_t SessThread;           /* Thread descriptor */
 616         pthread_attr_t attr;            /* Thread attributes */
 617         int a, i;                       /* General-purpose variables */
 618         char tracefile[PATH_MAX];
 619         char ip_addr[256]="0.0.0.0";
 620         char dirbuffer[PATH_MAX]="";
 621         int relh=0;
 622         int home=0;
 623         int home_specified=0;
 624         char relhome[PATH_MAX]="";
 625         char webcitdir[PATH_MAX] = DATADIR;
 626         char *pidfile = NULL;
 627         char *hdir;
 628         const char *basedir;
 629 #ifdef ENABLE_NLS
 630         char *locale = NULL;
 631         char *mo = NULL;
 632 #endif /* ENABLE_NLS */
 633         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
 634         const char *I18nDumpFile = NULL;
 635
 636         WildFireInitBacktrace(argv[0], 2);
 637
 638         HandlerHash = NewHash(1, NULL);
 639         PreferenceHooks = NewHash(1, NULL);
 640         WirelessTemplateCache = NewHash(1, NULL);
 641         WirelessLocalTemplateCache = NewHash(1, NULL);
 642         LocalTemplateCache = NewHash(1, NULL);
 643         TemplateCache = NewHash(1, NULL);
 644         GlobalNS = NewHash(1, NULL);
 645         Iterators = NewHash(1, NULL);
 646         Conditionals = NewHash(1, NULL);
 647         MsgHeaderHandler = NewHash(1, NULL);
 648         MimeRenderHandler = NewHash(1, NULL);
 649         SortHash = NewHash(1, NULL);
 650
 651         LoadZoneFiles();
 652
 653 #ifdef DBG_PRINNT_HOOKS_AT_START
 654         dbg_PrintHash(HandlerHash, nix, NULL);
 655 #endif
 656
 657         /* Ensure that we are linked to the correct version of libcitadel */
 658         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 659                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 660                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 661                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 662                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 663                 return(1);
 664         }
 665
 666         strcpy(uds_listen_path, "");
 667
 668         /* Parse command line */
 669 #ifdef HAVE_OPENSSL
 670         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:G:cfsZ")) != EOF)
 671 #else
 672         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:G:cfZ")) != EOF)
 673 #endif
 674                 switch (a) {
 675                 case 'h':
 676                         hdir = strdup(optarg);
 677                         relh=hdir[0]!='/';
 678                         if (!relh) safestrncpy(webcitdir, hdir,
 679                                                                    sizeof webcitdir);
 680                         else
 681                                 safestrncpy(relhome, relhome,
 682                                                         sizeof relhome);
 683                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 684                         home_specified = 1;
 685                         home=1;
 686                         break;
 687                 case 'd':
 688                         running_as_daemon = 1;
 689                         break;
 690                 case 'D':
 691                         pidfile = strdup(optarg);
 692                         running_as_daemon = 1;
 693                         break;
 694                 case 'i':
 695                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 696                         break;
 697                 case 'p':
 698                         http_port = atoi(optarg);
 699                         if (http_port == 0) {
 700                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 701                         }
 702                         break;
 703                 case 't':
 704                         safestrncpy(tracefile, optarg, sizeof tracefile);
 705                         freopen(tracefile, "w", stdout);
 706                         freopen(tracefile, "w", stderr);
 707                         freopen(tracefile, "r", stdin);
 708                         break;
 709                 case 'T':
 710                         LoadTemplates = atoi(optarg);
 711                         dbg_analyze_msg = (LoadTemplates && (1<<1)) != 0;
 712                         dbg_bactrace_template_errors = (LoadTemplates && (1<<2)) != 0;
 713                         break;
 714                 case 'Z':
 715                         DisableGzip = 1;
 716                         break;
 717                 case 'x':
 718                         verbosity = atoi(optarg);
 719                         break;
 720                 case 'f':
 721                         follow_xff = 1;
 722                         break;
 723                 case 'c':
 724                         server_cookie = malloc(256);
 725                         if (server_cookie != NULL) {
 726                                 safestrncpy(server_cookie,
 727                                        "Set-cookie: wcserver=",
 728                                         256);
 729                                 if (gethostname
 730                                     (&server_cookie[strlen(server_cookie)],
 731                                      200) != 0) {
 732                                         lprintf(2, "gethostname: %s\n",
 733                                                 strerror(errno));
 734                                         free(server_cookie);
 735                                 }
 736                         }
 737                         break;
 738                 case 's':
 739                         is_https = 1;
 740                         break;
 741                 case 'G':
 742                         DumpTemplateI18NStrings = 1;
 743                         I18nDump = NewStrBufPlain(HKEY("int templatestrings(void)\n{\n"));
 744                         I18nDumpFile = optarg;
 745                         break;
 746                 default:
 747                         fprintf(stderr, "usage: webcit "
 748                                 "[-i ip_addr] [-p http_port] "
 749                                 "[-t tracefile] [-c] [-f] "
 750                                 "[-T Templatedebuglevel] "
 751                                 "[-d] [-Z] [-G i18ndumpfile] "
 752 #ifdef HAVE_OPENSSL
 753                                 "[-s] "
 754 #endif
 755                                 "[remotehost [remoteport]]\n");
 756                         return 1;
 757                 }
 758
 759         if (optind < argc) {
 760                 ctdlhost = argv[optind];
 761                 if (++optind < argc)
 762                         ctdlport = argv[optind];
 763         }
 764
 765         /* daemonize, if we were asked to */
 766         if (!DumpTemplateI18NStrings && running_as_daemon) {
 767                 start_daemon(pidfile);
 768         }
 769         else {
 770                 signal(SIGHUP, graceful_shutdown);
 771         }
 772
 773         /* Tell 'em who's in da house */
 774         lprintf(1, PACKAGE_STRING "\n");
 775         lprintf(1, "Copyright (C) 1996-2009 by the Citadel development team.\n"
 776                 "This software is distributed under the terms of the "
 777                 "GNU General Public License.\n\n"
 778         );
 779
 780
 781         /* initialize the International Bright Young Thing */
 782 #ifdef ENABLE_NLS
 783         initialize_locales();
 784
 785
 786         locale = setlocale(LC_ALL, "");
 787
 788         mo = malloc(strlen(webcitdir) + 20);
 789         lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
 790         free(mo);
 791         lprintf(9, "Text domain: %s\n", textdomain("webcit"));
 792         lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
 793 #endif
 794
 795
 796         /* calculate all our path on a central place */
 797     /* where to keep our config */
 798
 799 #define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
 800         snprintf(SUBDIR,sizeof SUBDIR,  "%s%s%s%s%s%s%s", \
 801                          (home&!relh)?webcitdir:basedir, \
 802              ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
 803              ((basedir!=webcitdir)&(home&!relh))?"/":"", \
 804                          relhome, \
 805              (relhome[0]!='\0')?"/":"",\
 806                          dirbuffer,\
 807                          (dirbuffer[0]!='\0')?"/":"");
 808         basedir=RUNDIR;
 809         COMPUTE_DIRECTORY(socket_dir);
 810         basedir=WWWDIR "/static";
 811         COMPUTE_DIRECTORY(static_dir);
 812         basedir=WWWDIR "/static/icons";
 813         COMPUTE_DIRECTORY(static_icon_dir);
 814         basedir=WWWDIR "/static.local";
 815         COMPUTE_DIRECTORY(static_local_dir);
 816
 817         snprintf(file_crpt_file_key,
 818                  sizeof file_crpt_file_key,
 819                  "%s/citadel.key",
 820                  ctdl_key_dir);
 821         snprintf(file_crpt_file_csr,
 822                  sizeof file_crpt_file_csr,
 823                  "%s/citadel.csr",
 824                  ctdl_key_dir);
 825         snprintf(file_crpt_file_cer,
 826                  sizeof file_crpt_file_cer,
 827                  "%s/citadel.cer",
 828                  ctdl_key_dir);
 829
 830         /* we should go somewhere we can leave our coredump, if enabled... */
 831         lprintf(9, "Changing directory to %s\n", socket_dir);
 832         if (chdir(webcitdir) != 0) {
 833                 perror("chdir");
 834         }
 835         LoadIconDir(static_icon_dir);
 836
 837         initialise_modules();
 838         initialize_viewdefs();
 839         initialize_axdefs();
 840
 841         InitTemplateCache();
 842         if (DumpTemplateI18NStrings) {
 843                 FILE *fd;
 844                 StrBufAppendBufPlain(I18nDump, HKEY("}\n"), 0);
 845                 if (StrLength(I18nDump) < 50) {
 846                         lprintf(1, "********************************************************************************\n");
 847                         lprintf(1, "*        No strings found in templates! are you shure they're there?           *\n");
 848                         lprintf(1, "********************************************************************************\n");
 849                         return -1;
 850                 }
 851                 fd = fopen(I18nDumpFile, "w");
 852                 if (fd == NULL) {
 853                         lprintf(1, "********************************************************************************\n");
 854                         lprintf(1, "*                  unable to open I18N dumpfile [%s]         *\n", I18nDumpFile);
 855                         lprintf(1, "********************************************************************************\n");
 856                         return -1;
 857                 }
 858                 fwrite(ChrPtr(I18nDump), 1, StrLength(I18nDump), fd);
 859                 fclose(fd);
 860                 return 0;
 861         }
 862
 863         if (!access("static.local/webcit.css", R_OK)) {
 864                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"));
 865         }
 866
 867         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 868         icalerror_errors_are_fatal = 0;
 869
 870         /* Use our own prefix on tzid's generated from system tzdata */
 871         icaltimezone_set_tzid_prefix("/citadel.org/");
 872
 873         /*
 874          * Set up a place to put thread-specific data.
 875          * We only need a single pointer per thread - it points to the
 876          * wcsession struct to which the thread is currently bound.
 877          */
 878         if (pthread_key_create(&MyConKey, NULL) != 0) {
 879                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 880         }
 881         InitialiseSemaphores ();
 882
 883         /*
 884          * Set up a place to put thread-specific SSL data.
 885          * We don't stick this in the wcsession struct because SSL starts
 886          * up before the session is bound, and it gets torn down between
 887          * transactions.
 888          */
 889 #ifdef HAVE_OPENSSL
 890         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 891                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 892         }
 893 #endif
 894
 895         /*
 896          * Bind the server to our favorite port.
 897          * There is no need to check for errors, because ig_tcp_server()
 898          * exits if it doesn't succeed.
 899          */
 900
 901         if (!IsEmptyStr(uds_listen_path)) {
 902                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 903                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 904         }
 905         else {
 906                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 907                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 908         }
 909
 910         lprintf(2, "Listening on socket %d\n", msock);
 911         signal(SIGPIPE, SIG_IGN);
 912
 913         pthread_mutex_init(&SessionListMutex, NULL);
 914
 915         /*
 916          * Start up the housekeeping thread
 917          */
 918         pthread_attr_init(&attr);
 919         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 920         pthread_create(&SessThread, &attr,
 921                        (void *(*)(void *)) housekeeping_loop, NULL);
 922
 923
 924         /*
 925          * If this is an HTTPS server, fire up SSL
 926          */
 927 #ifdef HAVE_OPENSSL
 928         if (is_https) {
 929                 init_ssl();
 930         }
 931 #endif
 932
 933         /* Start a few initial worker threads */
 934         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 935                 spawn_another_worker_thread();
 936         }
 937
 938         /* now the original thread becomes another worker */
 939         worker_entry();
 940         ShutDownLibCitadel ();
 941         DeleteHash(&HandlerHash);
 942         DeleteHash(&PreferenceHooks);
 943         return 0;
 944 }
 945
 946
 947 void ShutDownWebcit(void)
 948 {
 949         DeleteHash(&ZoneHash);
 950         free_zone_directory ();
 951         icaltimezone_release_zone_tab ();
 952         icalmemory_free_ring ();
 953         ShutDownLibCitadel ();
 954         DeleteHash(&HandlerHash);
 955         DeleteHash(&PreferenceHooks);
 956         DeleteHash(&GlobalNS);
 957         DeleteHash(&WirelessTemplateCache);
 958         DeleteHash(&WirelessLocalTemplateCache);
 959         DeleteHash(&TemplateCache);
 960         DeleteHash(&LocalTemplateCache);
 961         DeleteHash(&Iterators);
 962         DeleteHash(&MimeRenderHandler);
 963         DeleteHash(&Conditionals);
 964         DeleteHash(&MsgHeaderHandler);
 965         DeleteHash(&SortHash);
 966 #ifdef ENABLE_NLS
 967         ShutdownLocale();
 968 #endif
 969 #ifdef HAVE_OPENSSL
 970         if (is_https) {
 971                 shutdown_ssl();
 972         }
 973 #endif
 974 }
 975
 976 /*
 977  * Entry point for worker threads
 978  */
 979 void worker_entry(void)
 980 {
 981         int ssock;
 982         int i = 0;
 983         int fail_this_transaction = 0;
 984         int ret;
 985         struct timeval tv;
 986         fd_set readset, tempset;
 987
 988         tv.tv_sec = 0;
 989         tv.tv_usec = 10000;
 990         FD_ZERO(&readset);
 991         FD_SET(msock, &readset);
 992
 993         do {
 994                 /* Only one thread can accept at a time */
 995                 fail_this_transaction = 0;
 996                 ssock = -1;
 997                 errno = EAGAIN;
 998                 do {
 999                         ret = -1; /* just one at once should select... */
1000                         begin_critical_section(S_SELECT);
1001
1002                         FD_ZERO(&tempset);
1003                         if (msock > 0) FD_SET(msock, &tempset);
1004                         tv.tv_sec = 0;
1005                         tv.tv_usec = 10000;
1006                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
1007                         end_critical_section(S_SELECT);
1008                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
1009                         {/* EINTR and EAGAIN are thrown but not of interest. */
1010                                 lprintf(2, "accept() failed:%d %s\n",
1011                                         errno, strerror(errno));
1012                         }
1013                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
1014                         {/* Successfully selected, and still not shutting down? Accept! */
1015                                 ssock = accept(msock, NULL, 0);
1016                         }
1017
1018                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
1019
1020                 if ((msock == -1)||(time_to_die))
1021                 {/* ok, we're going down. */
1022                         int shutdown = 0;
1023
1024                         /* the first to come here will have to do the cleanup.
1025                          * make shure its realy just one.
1026                          */
1027                         begin_critical_section(S_SHUTDOWN);
1028                         if (msock == -1)
1029                         {
1030                                 msock = -2;
1031                                 shutdown = 1;
1032                         }
1033                         end_critical_section(S_SHUTDOWN);
1034                         if (shutdown == 1)
1035                         {/* we're the one to cleanup the mess. */
1036                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
1037                                 shutdown_sessions();
1038                                 lprintf(2, "master shutdown: waiting for others\n");
1039                                 sleeeeeeeeeep(1); /* wait so some others might finish... */
1040                                 lprintf(2, "master shutdown: cleaning up sessions\n");
1041                                 do_housekeeping();
1042                                 lprintf(2, "master shutdown: cleaning up libical\n");
1043
1044                                 ShutDownWebcit();
1045
1046                                 lprintf(2, "master shutdown exiting!.\n");
1047                                 exit(0);
1048                         }
1049                         break;
1050                 }
1051                 if (ssock < 0 ) continue;
1052
1053                 if (msock < 0) {
1054                         if (ssock > 0) close (ssock);
1055                         lprintf(2, "inbetween.");
1056                         pthread_exit(NULL);
1057                 } else { /* Got it? do some real work! */
1058                         /* Set the SO_REUSEADDR socket option */
1059                         i = 1;
1060                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
1061                                    &i, sizeof(i));
1062
1063                         /* If we are an HTTPS server, go crypto now. */
1064 #ifdef HAVE_OPENSSL
1065                         if (is_https) {
1066                                 if (starttls(ssock) != 0) {
1067                                         fail_this_transaction = 1;
1068                                         close(ssock);
1069                                 }
1070                         }
1071 #endif
1072
1073                         if (fail_this_transaction == 0) {
1074
1075                                 /* Perform an HTTP transaction... */
1076                                 context_loop(&ssock);
1077
1078                                 /* Shut down SSL/TLS if required... */
1079 #ifdef HAVE_OPENSSL
1080                                 if (is_https) {
1081                                         endtls();
1082                                 }
1083 #endif
1084
1085                                 /* ...and close the socket. */
1086                                 if (ssock > 0)
1087                                         lingering_close(ssock);
1088                         }
1089
1090                 }
1091
1092         } while (!time_to_die);
1093
1094         lprintf (1, "bye\n");
1095         pthread_exit(NULL);
1096 }
1097
1098 /*
1099  * print log messages
1100  * logs to stderr if loglevel is lower than the verbosity set at startup
1101  *
1102  * loglevel     level of the message
1103  * format       the printf like format string
1104  * ...          the strings to put into format
1105  */
1106 int lprintf(int loglevel, const char *format, ...)
1107 {
1108         va_list ap;
1109
1110         if (loglevel <= verbosity) {
1111                 va_start(ap, format);
1112                 vfprintf(stderr, format, ap);
1113                 va_end(ap);
1114                 fflush(stderr);
1115         }
1116         return 1;
1117 }
1118
1119
1120 /*
1121  * print the actual stack frame.
1122  */
1123 void wc_backtrace(void)
1124 {
1125 #ifdef HAVE_BACKTRACE
1126         void *stack_frames[50];
1127         size_t size, i;
1128         char **strings;
1129
1130
1131         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
1132         strings = backtrace_symbols(stack_frames, size);
1133         for (i = 0; i < size; i++) {
1134                 if (strings != NULL)
1135                         lprintf(1, "%s\n", strings[i]);
1136                 else
1137                         lprintf(1, "%p\n", stack_frames[i]);
1138         }
1139         free(strings);
1140 #endif
1141 }
1142