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  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 263  */
 264 long end_burst(void)
 265 {
 266         wcsession *WCC = WC;
 267         const char *ptr, *eptr;
 268         long count;
 269         ssize_t res;
 270         fd_set wset;
 271         int fdflags;
 272
 273 #ifdef HAVE_ZLIB
 274         /* Perform gzip compression, if enabled and supported by client */
 275         if (!DisableGzip && (WCC->gzip_ok) && CompressBuffer(WCC->WBuf))
 276         {
 277                 hprintf("Content-encoding: gzip\r\n");
 278         }
 279 #endif  /* HAVE_ZLIB */
 280
 281         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 282
 283         ptr = ChrPtr(WCC->HBuf);
 284         count = StrLength(WCC->HBuf);
 285         eptr = ptr + count;
 286
 287 #ifdef HAVE_OPENSSL
 288         if (is_https) {
 289                 client_write_ssl(WCC->HBuf);
 290                 client_write_ssl(WCC->WBuf);
 291                 return (count);
 292         }
 293 #endif
 294
 295
 296 #ifdef HTTP_TRACING
 297
 298         write(2, "\033[34m", 5);
 299         write(2, ptr, StrLength(WCC->WBuf));
 300         write(2, "\033[30m", 5);
 301 #endif
 302         fdflags = fcntl(WC->http_sock, F_GETFL);
 303
 304         while (ptr < eptr) {
 305                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 306                         FD_ZERO(&wset);
 307                         FD_SET(WCC->http_sock, &wset);
 308                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 309                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 310                                 return -1;
 311                         }
 312                 }
 313
 314                 if ((res = write(WCC->http_sock,
 315                                  ptr,
 316                                  count)) == -1) {
 317                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 318                         wc_backtrace();
 319                         return res;
 320                 }
 321                 count -= res;
 322                 ptr += res;
 323         }
 324
 325         ptr = ChrPtr(WCC->WBuf);
 326         count = StrLength(WCC->WBuf);
 327         eptr = ptr + count;
 328
 329 #ifdef HTTP_TRACING
 330
 331         write(2, "\033[34m", 5);
 332         write(2, ptr, StrLength(WCC->WBuf));
 333         write(2, "\033[30m", 5);
 334 #endif
 335
 336         while (ptr < eptr) {
 337                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 338                         FD_ZERO(&wset);
 339                         FD_SET(WCC->http_sock, &wset);
 340                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 341                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 342                                 return -1;
 343                         }
 344                 }
 345
 346                 if ((res = write(WCC->http_sock,
 347                                  ptr,
 348                                  count)) == -1) {
 349                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 350                         wc_backtrace();
 351                         return res;
 352                 }
 353                 count -= res;
 354                 ptr += res;
 355         }
 356
 357         return StrLength(WCC->WBuf);
 358 }
 359
 360
 361
 362 /*
 363  * Read data from the client socket with default timeout.
 364  * (This is implemented in terms of client_read_to() and could be
 365  * justifiably moved out of sysdep.c)
 366  *
 367  * sock         the socket fd to read from
 368  * buf          the buffer to write to
 369  * bytes        Number of bytes to read
 370  */
 371 int client_read(int *sock, StrBuf *Target, StrBuf *buf, int bytes)
 372 {
 373         return (client_read_to(sock, Target, buf, bytes, SLEEPING));
 374 }
 375
 376
 377
 378 /*
 379  * Shut us down the regular way.
 380  * signum is the signal we want to forward
 381  */
 382 pid_t current_child;
 383 void graceful_shutdown_watcher(int signum) {
 384         lprintf (1, "bye; shutting down watcher.");
 385         kill(current_child, signum);
 386         if (signum != SIGHUP)
 387                 exit(0);
 388 }
 389
 390
 391 int ClientGetLine(int *sock, StrBuf *Target, StrBuf *CLineBuf)
 392 {
 393         const char *Error, *pch, *pchs;
 394         int rlen, len, retval = 0;
 395
 396         if (is_https) {
 397                 int ntries = 0;
 398                 if (StrLength(CLineBuf) > 0) {
 399                         pchs = ChrPtr(CLineBuf);
 400                         pch = strchr(pchs, '\n');
 401                         if (pch != NULL) {
 402                                 rlen = 0;
 403                                 len = pch - pchs;
 404                                 if (len > 0 && (*(pch - 1) == '\r') )
 405                                         rlen ++;
 406                                 StrBufSub(Target, CLineBuf, 0, len - rlen);
 407                                 StrBufCutLeft(CLineBuf, len + 1);
 408                                 return len - rlen;
 409                         }
 410                 }
 411
 412                 while (retval == 0) {
 413                                 pch = NULL;
 414                                 pchs = ChrPtr(CLineBuf);
 415                                 if (*pchs != '\0')
 416                                         pch = strchr(pchs, '\n');
 417                                 if (pch == NULL) {
 418                                         retval = client_read_sslbuffer(CLineBuf, SLEEPING);
 419                                         pchs = ChrPtr(CLineBuf);
 420                                         pch = strchr(pchs, '\n');
 421                                 }
 422                                 if (retval == 0) {
 423                                         sleeeeeeeeeep(1);
 424                                         ntries ++;
 425                                 }
 426                                 if (ntries > 10)
 427                                         return 0;
 428                 }
 429                 if ((retval > 0) && (pch != NULL)) {
 430                         rlen = 0;
 431                         len = pch - pchs;
 432                         if (len > 0 && (*(pch - 1) == '\r') )
 433                                 rlen ++;
 434                         StrBufSub(Target, CLineBuf, 0, len - rlen);
 435                         StrBufCutLeft(CLineBuf, len + 1);
 436                         return len - rlen;
 437
 438                 }
 439                 else
 440                         return -1;
 441         }
 442         else
 443                 return StrBufTCP_read_buffered_line(Target,
 444                                                     CLineBuf,
 445                                                     sock,
 446                                                     5,
 447                                                     1,
 448                                                     &Error);
 449 }
 450
 451
 452
 453 /*
 454  * Shut us down the regular way.
 455  * signum is the signal we want to forward
 456  */
 457 pid_t current_child;
 458 void graceful_shutdown(int signum) {
 459         char wd[SIZ];
 460         FILE *FD;
 461         int fd;
 462         getcwd(wd, SIZ);
 463         lprintf (1, "bye going down gracefull.[%d][%s]\n", signum, wd);
 464         fd = msock;
 465         msock = -1;
 466         time_to_die = 1;
 467         FD=fdopen(fd, "a+");
 468         fflush (FD);
 469         fclose (FD);
 470         close(fd);
 471 }
 472
 473
 474 /*
 475  * Start running as a daemon.
 476  */
 477 void start_daemon(char *pid_file)
 478 {
 479         int status = 0;
 480         pid_t child = 0;
 481         FILE *fp;
 482         int do_restart = 0;
 483
 484         current_child = 0;
 485
 486         /* Close stdin/stdout/stderr and replace them with /dev/null.
 487          * We don't just call close() because we don't want these fd's
 488          * to be reused for other files.
 489          */
 490         chdir("/");
 491
 492         signal(SIGHUP, SIG_IGN);
 493         signal(SIGINT, SIG_IGN);
 494         signal(SIGQUIT, SIG_IGN);
 495
 496         child = fork();
 497         if (child != 0) {
 498                 exit(0);
 499         }
 500
 501         setsid();
 502         umask(0);
 503         freopen("/dev/null", "r", stdin);
 504         freopen("/dev/null", "w", stdout);
 505         freopen("/dev/null", "w", stderr);
 506         signal(SIGTERM, graceful_shutdown_watcher);
 507         signal(SIGHUP, graceful_shutdown_watcher);
 508
 509         do {
 510                 current_child = fork();
 511
 512
 513                 if (current_child < 0) {
 514                         perror("fork");
 515                         ShutDownLibCitadel ();
 516                         exit(errno);
 517                 }
 518
 519                 else if (current_child == 0) {  /* child process */
 520                         signal(SIGHUP, graceful_shutdown);
 521
 522                         return; /* continue starting webcit. */
 523                 }
 524                 else { /* watcher process */
 525                         if (pid_file) {
 526                                 fp = fopen(pid_file, "w");
 527                                 if (fp != NULL) {
 528                                         fprintf(fp, "%d\n", getpid());
 529                                         fclose(fp);
 530                                 }
 531                         }
 532                         waitpid(current_child, &status, 0);
 533                 }
 534
 535                 do_restart = 0;
 536
 537                 /* Did the main process exit with an actual exit code? */
 538                 if (WIFEXITED(status)) {
 539
 540                         /* Exit code 0 means the watcher should exit */
 541                         if (WEXITSTATUS(status) == 0) {
 542                                 do_restart = 0;
 543                         }
 544
 545                         /* Exit code 101-109 means the watcher should exit */
 546                         else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
 547                                 do_restart = 0;
 548                         }
 549
 550                         /* Any other exit code means we should restart. */
 551                         else {
 552                                 do_restart = 1;
 553                         }
 554                 }
 555
 556                 /* Any other type of termination (signals, etc.) should also restart. */
 557                 else {
 558                         do_restart = 1;
 559                 }
 560
 561         } while (do_restart);
 562
 563         if (pid_file) {
 564                 unlink(pid_file);
 565         }
 566         ShutDownLibCitadel ();
 567         exit(WEXITSTATUS(status));
 568 }
 569
 570 /*
 571  * Spawn an additional worker thread into the pool.
 572  */
 573 void spawn_another_worker_thread()
 574 {
 575         pthread_t SessThread;   /* Thread descriptor */
 576         pthread_attr_t attr;    /* Thread attributes */
 577         int ret;
 578
 579         lprintf(3, "Creating a new thread\n");
 580
 581         /* set attributes for the new thread */
 582         pthread_attr_init(&attr);
 583         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 584
 585         /*
 586          * Our per-thread stacks need to be bigger than the default size, otherwise
 587          * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
 588          * 64-bit Linux.
 589          */
 590         if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
 591                 lprintf(1, "pthread_attr_setstacksize: %s\n",
 592                         strerror(ret));
 593                 pthread_attr_destroy(&attr);
 594         }
 595
 596         /* now create the thread */
 597         if (pthread_create(&SessThread, &attr,
 598                            (void *(*)(void *)) worker_entry, NULL)
 599             != 0) {
 600                 lprintf(1, "Can't create thread: %s\n", strerror(errno));
 601         }
 602
 603         /* free up the attributes */
 604         pthread_attr_destroy(&attr);
 605 }
 606
 607 /* #define DBG_PRINNT_HOOKS_AT_START */
 608 #ifdef DBG_PRINNT_HOOKS_AT_START
 609 const char foobuf[32];
 610 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
 611 #endif
 612 extern int analyze_msg;
 613 void InitTemplateCache(void);
 614 extern int LoadTemplates;
 615 extern void LoadZoneFiles(void);
 616 StrBuf *csslocal = NULL;
 617 /*
 618  * Here's where it all begins.
 619  */
 620 int main(int argc, char **argv)
 621 {
 622         pthread_t SessThread;           /* Thread descriptor */
 623         pthread_attr_t attr;            /* Thread attributes */
 624         int a, i;                       /* General-purpose variables */
 625         char tracefile[PATH_MAX];
 626         char ip_addr[256]="0.0.0.0";
 627         char dirbuffer[PATH_MAX]="";
 628         int relh=0;
 629         int home=0;
 630         int home_specified=0;
 631         char relhome[PATH_MAX]="";
 632         char webcitdir[PATH_MAX] = DATADIR;
 633         char *pidfile = NULL;
 634         char *hdir;
 635         const char *basedir;
 636 #ifdef ENABLE_NLS
 637         char *locale = NULL;
 638         char *mo = NULL;
 639 #endif /* ENABLE_NLS */
 640         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
 641
 642         HandlerHash = NewHash(1, NULL);
 643         PreferenceHooks = NewHash(1, NULL);
 644         WirelessTemplateCache = NewHash(1, NULL);
 645         WirelessLocalTemplateCache = NewHash(1, NULL);
 646         LocalTemplateCache = NewHash(1, NULL);
 647         TemplateCache = NewHash(1, NULL);
 648         GlobalNS = NewHash(1, NULL);
 649         Iterators = NewHash(1, NULL);
 650         Conditionals = NewHash(1, NULL);
 651         MsgHeaderHandler = NewHash(1, NULL);
 652         MimeRenderHandler = NewHash(1, NULL);
 653         SortHash = NewHash(1, NULL);
 654
 655         LoadZoneFiles();
 656
 657 #ifdef DBG_PRINNT_HOOKS_AT_START
 658         dbg_PrintHash(HandlerHash, nix, NULL);
 659 #endif
 660
 661         /* Ensure that we are linked to the correct version of libcitadel */
 662         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 663                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 664                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 665                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 666                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 667                 return(1);
 668         }
 669
 670         strcpy(uds_listen_path, "");
 671
 672         /* Parse command line */
 673 #ifdef HAVE_OPENSSL
 674         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:cfsZ")) != EOF)
 675 #else
 676         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:cfZ")) != EOF)
 677 #endif
 678                 switch (a) {
 679                 case 'h':
 680                         hdir = strdup(optarg);
 681                         relh=hdir[0]!='/';
 682                         if (!relh) safestrncpy(webcitdir, hdir,
 683                                                                    sizeof webcitdir);
 684                         else
 685                                 safestrncpy(relhome, relhome,
 686                                                         sizeof relhome);
 687                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 688                         home_specified = 1;
 689                         home=1;
 690                         break;
 691                 case 'd':
 692                         running_as_daemon = 1;
 693                         break;
 694                 case 'D':
 695                         pidfile = strdup(optarg);
 696                         running_as_daemon = 1;
 697                         break;
 698                 case 'i':
 699                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 700                         break;
 701                 case 'p':
 702                         http_port = atoi(optarg);
 703                         if (http_port == 0) {
 704                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 705                         }
 706                         break;
 707                 case 't':
 708                         safestrncpy(tracefile, optarg, sizeof tracefile);
 709                         freopen(tracefile, "w", stdout);
 710                         freopen(tracefile, "w", stderr);
 711                         freopen(tracefile, "r", stdin);
 712                         break;
 713                 case 'T':
 714                         LoadTemplates = atoi(optarg);
 715                         analyze_msg = (LoadTemplates && 0x2) != 0;
 716                         break;
 717                 case 'Z':
 718                         DisableGzip = 1;
 719                         break;
 720                 case 'x':
 721                         verbosity = atoi(optarg);
 722                         break;
 723                 case 'f':
 724                         follow_xff = 1;
 725                         break;
 726                 case 'c':
 727                         server_cookie = malloc(256);
 728                         if (server_cookie != NULL) {
 729                                 safestrncpy(server_cookie,
 730                                        "Set-cookie: wcserver=",
 731                                         256);
 732                                 if (gethostname
 733                                     (&server_cookie[strlen(server_cookie)],
 734                                      200) != 0) {
 735                                         lprintf(2, "gethostname: %s\n",
 736                                                 strerror(errno));
 737                                         free(server_cookie);
 738                                 }
 739                         }
 740                         break;
 741                 case 's':
 742                         is_https = 1;
 743                         break;
 744                 default:
 745                         fprintf(stderr, "usage: webcit "
 746                                 "[-i ip_addr] [-p http_port] "
 747                                 "[-t tracefile] [-c] [-f] "
 748                                 "[-T Templatedebuglevel] "
 749                                 "[-d] [-Z] "
 750 #ifdef HAVE_OPENSSL
 751                                 "[-s] "
 752 #endif
 753                                 "[remotehost [remoteport]]\n");
 754                         return 1;
 755                 }
 756
 757         if (optind < argc) {
 758                 ctdlhost = argv[optind];
 759                 if (++optind < argc)
 760                         ctdlport = argv[optind];
 761         }
 762
 763         /* daemonize, if we were asked to */
 764         if (running_as_daemon) {
 765                 start_daemon(pidfile);
 766         }
 767         else {
 768                 signal(SIGHUP, graceful_shutdown);
 769         }
 770
 771         /* Tell 'em who's in da house */
 772         lprintf(1, PACKAGE_STRING "\n");
 773         lprintf(1, "Copyright (C) 1996-2009 by the Citadel development team.\n"
 774                 "This software is distributed under the terms of the "
 775                 "GNU General Public License.\n\n"
 776         );
 777
 778
 779         /* initialize the International Bright Young Thing */
 780 #ifdef ENABLE_NLS
 781         initialize_locales();
 782
 783         locale = setlocale(LC_ALL, "");
 784
 785         mo = malloc(strlen(webcitdir) + 20);
 786         lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
 787         free(mo);
 788         lprintf(9, "Text domain: %s\n", textdomain("webcit"));
 789         lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
 790         preset_locale();
 791 #endif
 792
 793
 794         /* calculate all our path on a central place */
 795     /* where to keep our config */
 796
 797 #define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
 798         snprintf(SUBDIR,sizeof SUBDIR,  "%s%s%s%s%s%s%s", \
 799                          (home&!relh)?webcitdir:basedir, \
 800              ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
 801              ((basedir!=webcitdir)&(home&!relh))?"/":"", \
 802                          relhome, \
 803              (relhome[0]!='\0')?"/":"",\
 804                          dirbuffer,\
 805                          (dirbuffer[0]!='\0')?"/":"");
 806         basedir=RUNDIR;
 807         COMPUTE_DIRECTORY(socket_dir);
 808         basedir=WWWDIR "/static";
 809         COMPUTE_DIRECTORY(static_dir);
 810         basedir=WWWDIR "/static/icons";
 811         COMPUTE_DIRECTORY(static_icon_dir);
 812         basedir=WWWDIR "/static.local";
 813         COMPUTE_DIRECTORY(static_local_dir);
 814
 815         snprintf(file_crpt_file_key,
 816                  sizeof file_crpt_file_key,
 817                  "%s/citadel.key",
 818                  ctdl_key_dir);
 819         snprintf(file_crpt_file_csr,
 820                  sizeof file_crpt_file_csr,
 821                  "%s/citadel.csr",
 822                  ctdl_key_dir);
 823         snprintf(file_crpt_file_cer,
 824                  sizeof file_crpt_file_cer,
 825                  "%s/citadel.cer",
 826                  ctdl_key_dir);
 827
 828         /* we should go somewhere we can leave our coredump, if enabled... */
 829         lprintf(9, "Changing directory to %s\n", socket_dir);
 830         if (chdir(webcitdir) != 0) {
 831                 perror("chdir");
 832         }
 833         LoadIconDir(static_icon_dir);
 834
 835         initialise_modules();
 836         initialize_viewdefs();
 837         initialize_axdefs();
 838
 839         InitTemplateCache();
 840
 841         if (!access("static.local/webcit.css", R_OK)) {
 842                 csslocal = NewStrBufPlain(HKEY("<link href=\"static.local/webcit.css\" rel=\"stylesheet\" type=\"text/css\">"));
 843         }
 844
 845         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 846         icalerror_errors_are_fatal = 0;
 847
 848         /* Use our own prefix on tzid's generated from system tzdata */
 849         icaltimezone_set_tzid_prefix("/citadel.org/");
 850
 851         /*
 852          * Set up a place to put thread-specific data.
 853          * We only need a single pointer per thread - it points to the
 854          * wcsession struct to which the thread is currently bound.
 855          */
 856         if (pthread_key_create(&MyConKey, NULL) != 0) {
 857                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 858         }
 859         InitialiseSemaphores ();
 860
 861         /*
 862          * Set up a place to put thread-specific SSL data.
 863          * We don't stick this in the wcsession struct because SSL starts
 864          * up before the session is bound, and it gets torn down between
 865          * transactions.
 866          */
 867 #ifdef HAVE_OPENSSL
 868         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 869                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 870         }
 871 #endif
 872
 873         /*
 874          * Bind the server to our favorite port.
 875          * There is no need to check for errors, because ig_tcp_server()
 876          * exits if it doesn't succeed.
 877          */
 878
 879         if (!IsEmptyStr(uds_listen_path)) {
 880                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 881                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 882         }
 883         else {
 884                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 885                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 886         }
 887
 888         lprintf(2, "Listening on socket %d\n", msock);
 889         signal(SIGPIPE, SIG_IGN);
 890
 891         pthread_mutex_init(&SessionListMutex, NULL);
 892
 893         /*
 894          * Start up the housekeeping thread
 895          */
 896         pthread_attr_init(&attr);
 897         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 898         pthread_create(&SessThread, &attr,
 899                        (void *(*)(void *)) housekeeping_loop, NULL);
 900
 901
 902         /*
 903          * If this is an HTTPS server, fire up SSL
 904          */
 905 #ifdef HAVE_OPENSSL
 906         if (is_https) {
 907                 init_ssl();
 908         }
 909 #endif
 910
 911         /* Start a few initial worker threads */
 912         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 913                 spawn_another_worker_thread();
 914         }
 915
 916         /* now the original thread becomes another worker */
 917         worker_entry();
 918         ShutDownLibCitadel ();
 919         DeleteHash(&HandlerHash);
 920         DeleteHash(&PreferenceHooks);
 921         return 0;
 922 }
 923
 924
 925 void ShutDownWebcit(void)
 926 {
 927         DeleteHash(&ZoneHash);
 928         free_zone_directory ();
 929         icaltimezone_release_zone_tab ();
 930         icalmemory_free_ring ();
 931         ShutDownLibCitadel ();
 932         DeleteHash(&HandlerHash);
 933         DeleteHash(&PreferenceHooks);
 934         DeleteHash(&GlobalNS);
 935         DeleteHash(&WirelessTemplateCache);
 936         DeleteHash(&WirelessLocalTemplateCache);
 937         DeleteHash(&TemplateCache);
 938         DeleteHash(&LocalTemplateCache);
 939         DeleteHash(&Iterators);
 940         DeleteHash(&MimeRenderHandler);
 941         DeleteHash(&Conditionals);
 942         DeleteHash(&MsgHeaderHandler);
 943         DeleteHash(&SortHash);
 944 #ifdef ENABLE_NLS
 945         ShutdownLocale();
 946 #endif
 947 #ifdef HAVE_OPENSSL
 948         if (is_https) {
 949                 shutdown_ssl();
 950         }
 951 #endif
 952 }
 953
 954 /*
 955  * Entry point for worker threads
 956  */
 957 void worker_entry(void)
 958 {
 959         int ssock;
 960         int i = 0;
 961         int fail_this_transaction = 0;
 962         int ret;
 963         struct timeval tv;
 964         fd_set readset, tempset;
 965
 966         tv.tv_sec = 0;
 967         tv.tv_usec = 10000;
 968         FD_ZERO(&readset);
 969         FD_SET(msock, &readset);
 970
 971         do {
 972                 /* Only one thread can accept at a time */
 973                 fail_this_transaction = 0;
 974                 ssock = -1;
 975                 errno = EAGAIN;
 976                 do {
 977                         ret = -1; /* just one at once should select... */
 978                         begin_critical_section(S_SELECT);
 979
 980                         FD_ZERO(&tempset);
 981                         if (msock > 0) FD_SET(msock, &tempset);
 982                         tv.tv_sec = 0;
 983                         tv.tv_usec = 10000;
 984                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
 985                         end_critical_section(S_SELECT);
 986                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
 987                         {/* EINTR and EAGAIN are thrown but not of interest. */
 988                                 lprintf(2, "accept() failed:%d %s\n",
 989                                         errno, strerror(errno));
 990                         }
 991                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
 992                         {/* Successfully selected, and still not shutting down? Accept! */
 993                                 ssock = accept(msock, NULL, 0);
 994                         }
 995
 996                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
 997
 998                 if ((msock == -1)||(time_to_die))
 999                 {/* ok, we're going down. */
1000                         int shutdown = 0;
1001
1002                         /* the first to come here will have to do the cleanup.
1003                          * make shure its realy just one.
1004                          */
1005                         begin_critical_section(S_SHUTDOWN);
1006                         if (msock == -1)
1007                         {
1008                                 msock = -2;
1009                                 shutdown = 1;
1010                         }
1011                         end_critical_section(S_SHUTDOWN);
1012                         if (shutdown == 1)
1013                         {/* we're the one to cleanup the mess. */
1014                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
1015                                 shutdown_sessions();
1016                                 lprintf(2, "master shutdown: waiting for others\n");
1017                                 sleeeeeeeeeep(1); /* wait so some others might finish... */
1018                                 lprintf(2, "master shutdown: cleaning up sessions\n");
1019                                 do_housekeeping();
1020                                 lprintf(2, "master shutdown: cleaning up libical\n");
1021
1022                                 ShutDownWebcit();
1023
1024                                 lprintf(2, "master shutdown exiting!.\n");
1025                                 exit(0);
1026                         }
1027                         break;
1028                 }
1029                 if (ssock < 0 ) continue;
1030
1031                 if (msock < 0) {
1032                         if (ssock > 0) close (ssock);
1033                         lprintf(2, "inbetween.");
1034                         pthread_exit(NULL);
1035                 } else { /* Got it? do some real work! */
1036                         /* Set the SO_REUSEADDR socket option */
1037                         i = 1;
1038                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
1039                                    &i, sizeof(i));
1040
1041                         /* If we are an HTTPS server, go crypto now. */
1042 #ifdef HAVE_OPENSSL
1043                         if (is_https) {
1044                                 if (starttls(ssock) != 0) {
1045                                         fail_this_transaction = 1;
1046                                         close(ssock);
1047                                 }
1048                         }
1049 #endif
1050
1051                         if (fail_this_transaction == 0) {
1052
1053                                 /* Perform an HTTP transaction... */
1054                                 context_loop(&ssock);
1055
1056                                 /* Shut down SSL/TLS if required... */
1057 #ifdef HAVE_OPENSSL
1058                                 if (is_https) {
1059                                         endtls();
1060                                 }
1061 #endif
1062
1063                                 /* ...and close the socket. */
1064                                 if (ssock > 0)
1065                                         lingering_close(ssock);
1066                         }
1067
1068                 }
1069
1070         } while (!time_to_die);
1071
1072         lprintf (1, "bye\n");
1073         pthread_exit(NULL);
1074 }
1075
1076 /*
1077  * print log messages
1078  * logs to stderr if loglevel is lower than the verbosity set at startup
1079  *
1080  * loglevel     level of the message
1081  * format       the printf like format string
1082  * ...          the strings to put into format
1083  */
1084 int lprintf(int loglevel, const char *format, ...)
1085 {
1086         va_list ap;
1087
1088         if (loglevel <= verbosity) {
1089                 va_start(ap, format);
1090                 vfprintf(stderr, format, ap);
1091                 va_end(ap);
1092                 fflush(stderr);
1093         }
1094         return 1;
1095 }
1096
1097
1098 /*
1099  * print the actual stack frame.
1100  */
1101 void wc_backtrace(void)
1102 {
1103 #ifdef HAVE_BACKTRACE
1104         void *stack_frames[50];
1105         size_t size, i;
1106         char **strings;
1107
1108
1109         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
1110         strings = backtrace_symbols(stack_frames, size);
1111         for (i = 0; i < size; i++) {
1112                 if (strings != NULL)
1113                         lprintf(1, "%s\n", strings[i]);
1114                 else
1115                         lprintf(1, "%p\n", stack_frames[i]);
1116         }
1117         free(strings);
1118 #endif
1119 }
1120