webcit/webserver.c

   1 /*
   2  * $Id$
   3  *
   4  * This contains a simple multithreaded TCP server manager.  It sits around
   5  * waiting on the specified port for incoming HTTP connections.  When a
   6  * connection is established, it calls context_loop() from context_loop.c.
   7  *
   8  * Copyright (c) 1996-2008 by the citadel.org developers.
   9  * This program is released under the terms of the GNU General Public License v3.
  10  *
  11  */
  12
  13 #include "webcit.h"
  14 #include "webserver.h"
  15
  16 #if HAVE_BACKTRACE
  17 #include <execinfo.h>
  18 #endif
  19 #include "modules_init.h"
  20 #ifndef HAVE_SNPRINTF
  21 int vsnprintf(char *buf, size_t max, const char *fmt, va_list argp);
  22 #endif
  23
  24 int verbosity = 9;              /* Logging level */
  25 int msock;                      /* master listening socket */
  26 int is_https = 0;               /* Nonzero if I am an HTTPS service */
  27 int follow_xff = 0;             /* Follow X-Forwarded-For: header */
  28 int home_specified = 0;         /* did the user specify a homedir? */
  29 int time_to_die = 0;            /* Nonzero if server is shutting down */
  30 extern void *context_loop(int*);
  31 extern void *housekeeping_loop(void);
  32 extern pthread_mutex_t SessionListMutex;
  33 extern pthread_key_t MyConKey;
  34
  35
  36 char ctdl_key_dir[PATH_MAX]=SSL_DIR;
  37 char file_crpt_file_key[PATH_MAX]="";
  38 char file_crpt_file_csr[PATH_MAX]="";
  39 char file_crpt_file_cer[PATH_MAX]="";
  40
  41 char socket_dir[PATH_MAX];                      /* where to talk to our citadel server */
  42 static const char editor_absolut_dir[PATH_MAX]=EDITORDIR;       /* nailed to what configure gives us. */
  43 static char static_dir[PATH_MAX];               /* calculated on startup */
  44 static char static_local_dir[PATH_MAX];         /* calculated on startup */
  45 static char static_icon_dir[PATH_MAX];          /* where should we find our mime icons? */
  46 char  *static_dirs[]={                          /* needs same sort order as the web mapping */
  47         (char*)static_dir,                      /* our templates on disk */
  48         (char*)static_local_dir,                /* user provided templates disk */
  49         (char*)editor_absolut_dir,              /* the editor on disk */
  50         (char*)static_icon_dir                  /* our icons... */
  51 };
  52
  53 /*
  54  * Subdirectories from which the client may request static content
  55  *
  56  * (If you add more, remember to increment 'ndirs' below)
  57  */
  58 char *static_content_dirs[] = {
  59         "static",                     /* static templates */
  60         "static.local",               /* site local static templates */
  61         "tiny_mce"                    /* rich text editor */
  62 };
  63
  64 int ndirs=3;
  65
  66
  67 char *server_cookie = NULL;     /* our Cookie connection to the client */
  68 int http_port = PORT_NUM;       /* Port to listen on */
  69 char *ctdlhost = DEFAULT_HOST;  /* our name */
  70 char *ctdlport = DEFAULT_PORT;  /* our Port */
  71 int setup_wizard = 0;           /* should we run the setup wizard? \todo */
  72 char wizard_filename[PATH_MAX]; /* where's the setup wizard? */
  73 int running_as_daemon = 0;      /* should we deamonize on startup? */
  74
  75
  76 /*
  77  * This is a generic function to set up a master socket for listening on
  78  * a TCP port.  The server shuts down if the bind fails.
  79  *
  80  * ip_addr      IP address to bind
  81  * port_number  port number to bind
  82  * queue_len    number of incoming connections to allow in the queue
  83  */
  84 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
  85 {
  86         struct sockaddr_in sin;
  87         int s, i;
  88
  89         memset(&sin, 0, sizeof(sin));
  90         sin.sin_family = AF_INET;
  91         if (ip_addr == NULL) {
  92                 sin.sin_addr.s_addr = INADDR_ANY;
  93         } else {
  94                 sin.sin_addr.s_addr = inet_addr(ip_addr);
  95         }
  96
  97         if (sin.sin_addr.s_addr == INADDR_NONE) {
  98                 sin.sin_addr.s_addr = INADDR_ANY;
  99         }
 100
 101         if (port_number == 0) {
 102                 lprintf(1, "Cannot start: no port number specified.\n");
 103                 exit(WC_EXIT_BIND);
 104         }
 105         sin.sin_port = htons((u_short) port_number);
 106
 107         s = socket(PF_INET, SOCK_STREAM, (getprotobyname("tcp")->p_proto));
 108         if (s < 0) {
 109                 lprintf(1, "Can't create a socket: %s\n", strerror(errno));
 110                 exit(WC_EXIT_BIND);
 111         }
 112         /* Set some socket options that make sense. */
 113         i = 1;
 114         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 115
 116         fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
 117                                           there should be a preceding F_GETFL
 118                                           and a bitwise OR with the previous
 119                                           fd flags */
 120
 121         if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 122                 lprintf(1, "Can't bind: %s\n", strerror(errno));
 123                 exit(WC_EXIT_BIND);
 124         }
 125         if (listen(s, queue_len) < 0) {
 126                 lprintf(1, "Can't listen: %s\n", strerror(errno));
 127                 exit(WC_EXIT_BIND);
 128         }
 129         return (s);
 130 }
 131
 132
 133
 134 /*
 135  * Create a Unix domain socket and listen on it
 136  * sockpath - file name of the unix domain socket
 137  * queue_len - Number of incoming connections to allow in the queue
 138  */
 139 int ig_uds_server(char *sockpath, int queue_len)
 140 {
 141         struct sockaddr_un addr;
 142         int s;
 143         int i;
 144         int actual_queue_len;
 145
 146         actual_queue_len = queue_len;
 147         if (actual_queue_len < 5) actual_queue_len = 5;
 148
 149         i = unlink(sockpath);
 150         if (i != 0) if (errno != ENOENT) {
 151                 lprintf(1, "webcit: can't unlink %s: %s\n",
 152                         sockpath, strerror(errno));
 153                 exit(WC_EXIT_BIND);
 154         }
 155
 156         memset(&addr, 0, sizeof(addr));
 157         addr.sun_family = AF_UNIX;
 158         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 159
 160         s = socket(AF_UNIX, SOCK_STREAM, 0);
 161         if (s < 0) {
 162                 lprintf(1, "webcit: Can't create a socket: %s\n",
 163                         strerror(errno));
 164                 exit(WC_EXIT_BIND);
 165         }
 166
 167         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 168                 lprintf(1, "webcit: Can't bind: %s\n",
 169                         strerror(errno));
 170                 exit(WC_EXIT_BIND);
 171         }
 172
 173         if (listen(s, actual_queue_len) < 0) {
 174                 lprintf(1, "webcit: Can't listen: %s\n",
 175                         strerror(errno));
 176                 exit(WC_EXIT_BIND);
 177         }
 178
 179         chmod(sockpath, 0777);
 180         return(s);
 181 }
 182
 183
 184
 185
 186 /*
 187  * Read data from the client socket.
 188  *
 189  * sock         socket fd to read from
 190  * buf          buffer to read into
 191  * bytes        number of bytes to read
 192  * timeout      Number of seconds to wait before timing out
 193  *
 194  * Possible return values:
 195  *      1       Requested number of bytes has been read.
 196  *      0       Request timed out.
 197  *      -1      Connection is broken, or other error.
 198  */
 199 int client_read_to(int *sock, StrBuf *Target, StrBuf *Buf, int bytes, int timeout)
 200 {
 201         const char *Error;
 202         int retval = 0;
 203
 204 #ifdef HAVE_OPENSSL
 205         if (is_https) {
 206                 while ((retval >= 0) && (StrLength(Buf) < bytes))
 207                         retval = client_read_sslbuffer(Buf, timeout);
 208                 if (retval >= 0) {
 209                         StrBufAppendBuf(Target, Buf, 0); /// todo: Buf > bytes?
 210
 211                 }
 212                 else {
 213                         lprintf(2, "client_read_ssl() failed\n");
 214                         return -1;
 215                 }
 216         }
 217 #endif
 218
 219         if (StrLength(Buf) > 0) {//// todo: what if Buf > bytes?
 220                 StrBufAppendBuf(Target, Buf, 0);
 221         }
 222         retval = StrBufReadBLOB(Target,
 223                            sock,
 224                            (StrLength(Target) > 0),
 225                            bytes - StrLength(Target),
 226                                 &Error);
 227         if (retval < 0) {
 228                 lprintf(2, "client_read() failed: %s\n",
 229                         Error);
 230                 return retval;
 231         }
 232
 233 #ifdef HTTP_TRACING
 234         write(2, "\033[32m", 5);
 235         write(2, buf, bytes);
 236         write(2, "\033[30m", 5);
 237 #endif
 238         return (1);
 239 }
 240
 241
 242 /*
 243  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 244  */
 245 void begin_burst(void)
 246 {
 247         if (WC->WBuf == NULL)
 248                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 249 }
 250
 251
 252 /*
 253  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 254  */
 255 long end_burst(void)
 256 {
 257         struct wcsession *WCC = WC;
 258         const char *ptr, *eptr;
 259         long count;
 260         ssize_t res;
 261         fd_set wset;
 262         int fdflags;
 263
 264 #ifdef HAVE_ZLIB
 265         /* Perform gzip compression, if enabled and supported by client */
 266         if ((WCC->gzip_ok) && CompressBuffer(WCC->WBuf))
 267         {
 268                 hprintf("Content-encoding: gzip\r\n");
 269         }
 270 #endif  /* HAVE_ZLIB */
 271
 272         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 273
 274         ptr = ChrPtr(WCC->HBuf);
 275         count = StrLength(WCC->HBuf);
 276         eptr = ptr + count;
 277
 278 #ifdef HAVE_OPENSSL
 279         if (is_https) {
 280                 client_write_ssl(WCC->HBuf);
 281                 client_write_ssl(WCC->WBuf);
 282                 return (count);
 283         }
 284 #endif
 285
 286
 287 #ifdef HTTP_TRACING
 288
 289         write(2, "\033[34m", 5);
 290         write(2, ptr, StrLength(WCC->WBuf));
 291         write(2, "\033[30m", 5);
 292 #endif
 293         fdflags = fcntl(WC->http_sock, F_GETFL);
 294
 295         while (ptr < eptr) {
 296                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 297                         FD_ZERO(&wset);
 298                         FD_SET(WCC->http_sock, &wset);
 299                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 300                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 301                                 return -1;
 302                         }
 303                 }
 304
 305                 if ((res = write(WCC->http_sock,
 306                                  ptr,
 307                                  count)) == -1) {
 308                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 309                         wc_backtrace();
 310                         return res;
 311                 }
 312                 count -= res;
 313                 ptr += res;
 314         }
 315
 316         ptr = ChrPtr(WCC->WBuf);
 317         count = StrLength(WCC->WBuf);
 318         eptr = ptr + count;
 319
 320 #ifdef HTTP_TRACING
 321
 322         write(2, "\033[34m", 5);
 323         write(2, ptr, StrLength(WCC->WBuf));
 324         write(2, "\033[30m", 5);
 325 #endif
 326
 327         while (ptr < eptr) {
 328                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 329                         FD_ZERO(&wset);
 330                         FD_SET(WCC->http_sock, &wset);
 331                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 332                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 333                                 return -1;
 334                         }
 335                 }
 336
 337                 if ((res = write(WCC->http_sock,
 338                                  ptr,
 339                                  count)) == -1) {
 340                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 341                         wc_backtrace();
 342                         return res;
 343                 }
 344                 count -= res;
 345                 ptr += res;
 346         }
 347
 348         return StrLength(WCC->WBuf);
 349 }
 350
 351
 352
 353 /*
 354  * Read data from the client socket with default timeout.
 355  * (This is implemented in terms of client_read_to() and could be
 356  * justifiably moved out of sysdep.c)
 357  *
 358  * sock         the socket fd to read from
 359  * buf          the buffer to write to
 360  * bytes        Number of bytes to read
 361  */
 362 int client_read(int *sock, StrBuf *Target, StrBuf *buf, int bytes)
 363 {
 364         return (client_read_to(sock, Target, buf, bytes, SLEEPING));
 365 }
 366
 367
 368 /*
 369  * Get a LF-terminated line of text from the client.
 370  * (This is implemented in terms of client_read() and could be
 371  * justifiably moved out of sysdep.c)
 372  *
 373  * sock         socket fd to get client line from
 374  * buf          buffer to write read data to
 375  * bufsiz       how many bytes to read
 376  *
 377  * returns the number of bytes read
 378  */
 379 /////int client_getln(int *sock, char *buf, int bufsiz)
 380 /////{
 381 /////   int i, retval;
 382 /////
 383 /////   /* Read one character at a time.*/
 384 /////   for (i = 0; *sock > 0; i++) {
 385 /////           retval = client_read(sock, &buf[i], 1);
 386 /////           if (retval < 0)
 387 /////                   return retval;
 388 /////           if (retval != 1 || buf[i] == '\n' || i == (bufsiz-1))
 389 /////                   break;
 390 /////           if ( (!isspace(buf[i])) && (!isprint(buf[i])) ) {
 391 /////                   /* Non printable character recieved from client */
 392 /////                   return(-1);
 393 /////           }
 394 /////   }
 395 /////
 396 /////   /* If we got a long line, discard characters until the newline. */
 397 /////   if (i == (bufsiz-1))
 398 /////           while (buf[i] != '\n' && retval == 1)
 399 /////                   retval = client_read(sock, &buf[i], 1);
 400 /////
 401 /////   /*
 402 /////    * Strip any trailing non-printable characters.
 403 /////    */
 404 /////   buf[i] = 0;
 405 /////   while ((i > 0) && (!isprint(buf[i - 1]))) {
 406 /////           buf[--i] = 0;
 407 /////   }
 408 /////   return (retval);
 409 /////}
 410
 411 /*
 412  * Shut us down the regular way.
 413  * signum is the signal we want to forward
 414  */
 415 pid_t current_child;
 416 void graceful_shutdown_watcher(int signum) {
 417         lprintf (1, "bye; shutting down watcher.");
 418         kill(current_child, signum);
 419         if (signum != SIGHUP)
 420                 exit(0);
 421 }
 422
 423
 424 int ClientGetLine(int *sock, StrBuf *Target, StrBuf *CLineBuf)
 425 {
 426         const char *Error, *pch, *pchs;
 427         int rlen, len, retval = 0;
 428
 429         if (is_https) {
 430                 if (StrLength(CLineBuf) > 0) {
 431                         pchs = ChrPtr(CLineBuf);
 432                         pch = strchr(pchs, '\n');
 433                         if (pch != NULL) {
 434                                 rlen = 0;
 435                                 len = pch - pchs;
 436                                 if (len > 0 && (*(pch - 1) == '\r') )
 437                                         rlen ++;
 438                                 StrBufSub(Target, CLineBuf, 0, len - rlen);
 439                                 StrBufCutLeft(CLineBuf, len + 1);
 440                                 return len - rlen;
 441                         }
 442                 }
 443
 444                 while ((retval >= 0) &&
 445                        (pchs = ChrPtr(CLineBuf),
 446                         pch = strchr(pchs, '\n'),
 447                         pch == NULL))
 448                         retval = client_read_sslbuffer(CLineBuf, SLEEPING);
 449                 if ((retval > 0) && (pch != NULL)) {
 450                         rlen = 0;
 451                         len = pch - pchs;
 452                         if (len > 0 && (*(pch - 1) == '\r') )
 453                                 rlen ++;
 454                         StrBufSub(Target, CLineBuf, 0, len - rlen);
 455                         StrBufCutLeft(CLineBuf, len + 1);
 456                         return len - rlen;
 457
 458                 }
 459                 else
 460                         return -1;
 461         }
 462         else
 463                 return StrBufTCP_read_buffered_line(Target,
 464                                                     CLineBuf,
 465                                                     sock,
 466                                                     5,
 467                                                     1,
 468                                                     &Error);
 469 }
 470
 471
 472
 473 /*
 474  * Shut us down the regular way.
 475  * signum is the signal we want to forward
 476  */
 477 pid_t current_child;
 478 void graceful_shutdown(int signum) {
 479 //      kill(current_child, signum);
 480         char wd[SIZ];
 481         FILE *FD;
 482         int fd;
 483         getcwd(wd, SIZ);
 484         lprintf (1, "bye going down gracefull.[%d][%s]\n", signum, wd);
 485         fd = msock;
 486         msock = -1;
 487         time_to_die = 1;
 488         FD=fdopen(fd, "a+");
 489         fflush (FD);
 490         fclose (FD);
 491         close(fd);
 492 }
 493
 494
 495 /*
 496  * Start running as a daemon.
 497  */
 498 void start_daemon(char *pid_file)
 499 {
 500         int status = 0;
 501         pid_t child = 0;
 502         FILE *fp;
 503         int do_restart = 0;
 504
 505         current_child = 0;
 506
 507         /* Close stdin/stdout/stderr and replace them with /dev/null.
 508          * We don't just call close() because we don't want these fd's
 509          * to be reused for other files.
 510          */
 511         chdir("/");
 512
 513         signal(SIGHUP, SIG_IGN);
 514         signal(SIGINT, SIG_IGN);
 515         signal(SIGQUIT, SIG_IGN);
 516
 517         child = fork();
 518         if (child != 0) {
 519                 exit(0);
 520         }
 521
 522         setsid();
 523         umask(0);
 524         freopen("/dev/null", "r", stdin);
 525         freopen("/dev/null", "w", stdout);
 526         freopen("/dev/null", "w", stderr);
 527         signal(SIGTERM, graceful_shutdown_watcher);
 528         signal(SIGHUP, graceful_shutdown_watcher);
 529
 530         do {
 531                 current_child = fork();
 532
 533
 534                 if (current_child < 0) {
 535                         perror("fork");
 536                         ShutDownLibCitadel ();
 537                         exit(errno);
 538                 }
 539
 540                 else if (current_child == 0) {  // child process
 541 //                      signal(SIGTERM, graceful_shutdown);
 542                         signal(SIGHUP, graceful_shutdown);
 543
 544                         return; /* continue starting webcit. */
 545                 }
 546
 547                 else { // watcher process
 548 //                      signal(SIGTERM, SIG_IGN);
 549 //                      signal(SIGHUP, SIG_IGN);
 550                         if (pid_file) {
 551                                 fp = fopen(pid_file, "w");
 552                                 if (fp != NULL) {
 553                                         fprintf(fp, "%d\n", getpid());
 554                                         fclose(fp);
 555                                 }
 556                         }
 557                         waitpid(current_child, &status, 0);
 558                 }
 559
 560                 do_restart = 0;
 561
 562                 /* Did the main process exit with an actual exit code? */
 563                 if (WIFEXITED(status)) {
 564
 565                         /* Exit code 0 means the watcher should exit */
 566                         if (WEXITSTATUS(status) == 0) {
 567                                 do_restart = 0;
 568                         }
 569
 570                         /* Exit code 101-109 means the watcher should exit */
 571                         else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
 572                                 do_restart = 0;
 573                         }
 574
 575                         /* Any other exit code means we should restart. */
 576                         else {
 577                                 do_restart = 1;
 578                         }
 579                 }
 580
 581                 /* Any other type of termination (signals, etc.) should also restart. */
 582                 else {
 583                         do_restart = 1;
 584                 }
 585
 586         } while (do_restart);
 587
 588         if (pid_file) {
 589                 unlink(pid_file);
 590         }
 591         ShutDownLibCitadel ();
 592         exit(WEXITSTATUS(status));
 593 }
 594
 595 /*
 596  * Spawn an additional worker thread into the pool.
 597  */
 598 void spawn_another_worker_thread()
 599 {
 600         pthread_t SessThread;   /* Thread descriptor */
 601         pthread_attr_t attr;    /* Thread attributes */
 602         int ret;
 603
 604         lprintf(3, "Creating a new thread\n");
 605
 606         /* set attributes for the new thread */
 607         pthread_attr_init(&attr);
 608         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 609
 610         /*
 611          * Our per-thread stacks need to be bigger than the default size, otherwise
 612          * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
 613          * 64-bit Linux.
 614          */
 615         if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
 616                 lprintf(1, "pthread_attr_setstacksize: %s\n",
 617                         strerror(ret));
 618                 pthread_attr_destroy(&attr);
 619         }
 620
 621         /* now create the thread */
 622         if (pthread_create(&SessThread, &attr,
 623                            (void *(*)(void *)) worker_entry, NULL)
 624             != 0) {
 625                 lprintf(1, "Can't create thread: %s\n", strerror(errno));
 626         }
 627
 628         /* free up the attributes */
 629         pthread_attr_destroy(&attr);
 630 }
 631
 632 //#define DBG_PRINNT_HOOKS_AT_START
 633 #ifdef DBG_PRINNT_HOOKS_AT_START
 634 const char foobuf[32];
 635 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
 636 #endif
 637 void InitTemplateCache(void);
 638 extern int LoadTemplates;
 639 extern void LoadZoneFiles(void);
 640
 641 /*
 642  * Here's where it all begins.
 643  */
 644 int main(int argc, char **argv)
 645 {
 646         pthread_t SessThread;           /* Thread descriptor */
 647         pthread_attr_t attr;            /* Thread attributes */
 648         int a, i;                       /* General-purpose variables */
 649         char tracefile[PATH_MAX];
 650         char ip_addr[256]="0.0.0.0";
 651         char dirbuffer[PATH_MAX]="";
 652         int relh=0;
 653         int home=0;
 654         int home_specified=0;
 655         char relhome[PATH_MAX]="";
 656         char webcitdir[PATH_MAX] = DATADIR;
 657         char *pidfile = NULL;
 658         char *hdir;
 659         const char *basedir;
 660 #ifdef ENABLE_NLS
 661         char *locale = NULL;
 662         char *mo = NULL;
 663 #endif /* ENABLE_NLS */
 664         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
 665
 666         HandlerHash = NewHash(1, NULL);
 667         PreferenceHooks = NewHash(1, NULL);
 668         WirelessTemplateCache = NewHash(1, NULL);
 669         WirelessLocalTemplateCache = NewHash(1, NULL);
 670         LocalTemplateCache = NewHash(1, NULL);
 671         TemplateCache = NewHash(1, NULL);
 672         GlobalNS = NewHash(1, NULL);
 673         Iterators = NewHash(1, NULL);
 674         Contitionals = NewHash(1, NULL);
 675         LoadZoneFiles();
 676
 677
 678 #ifdef DBG_PRINNT_HOOKS_AT_START
 679         dbg_PrintHash(HandlerHash, nix, NULL);
 680 #endif
 681
 682         /* Ensure that we are linked to the correct version of libcitadel */
 683         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 684                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 685                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 686                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 687                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 688                 return(1);
 689         }
 690
 691         strcpy(uds_listen_path, "");
 692
 693         /* Parse command line */
 694 #ifdef HAVE_OPENSSL
 695         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:cfs")) != EOF)
 696 #else
 697         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:cf")) != EOF)
 698 #endif
 699                 switch (a) {
 700                 case 'h':
 701                         hdir = strdup(optarg);
 702                         relh=hdir[0]!='/';
 703                         if (!relh) safestrncpy(webcitdir, hdir,
 704                                                                    sizeof webcitdir);
 705                         else
 706                                 safestrncpy(relhome, relhome,
 707                                                         sizeof relhome);
 708                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 709                         home_specified = 1;
 710                         home=1;
 711                         break;
 712                 case 'd':
 713                         running_as_daemon = 1;
 714                         break;
 715                 case 'D':
 716                         pidfile = strdup(optarg);
 717                         running_as_daemon = 1;
 718                         break;
 719                 case 'i':
 720                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 721                         break;
 722                 case 'p':
 723                         http_port = atoi(optarg);
 724                         if (http_port == 0) {
 725                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 726                         }
 727                         break;
 728                 case 't':
 729                         safestrncpy(tracefile, optarg, sizeof tracefile);
 730                         freopen(tracefile, "w", stdout);
 731                         freopen(tracefile, "w", stderr);
 732                         freopen(tracefile, "r", stdin);
 733                         break;
 734                 case 'T':
 735                         LoadTemplates = atoi(optarg);
 736                         break;
 737                 case 'x':
 738                         verbosity = atoi(optarg);
 739                         break;
 740                 case 'f':
 741                         follow_xff = 1;
 742                         break;
 743                 case 'c':
 744                         server_cookie = malloc(256);
 745                         if (server_cookie != NULL) {
 746                                 safestrncpy(server_cookie,
 747                                        "Set-cookie: wcserver=",
 748                                         256);
 749                                 if (gethostname
 750                                     (&server_cookie[strlen(server_cookie)],
 751                                      200) != 0) {
 752                                         lprintf(2, "gethostname: %s\n",
 753                                                 strerror(errno));
 754                                         free(server_cookie);
 755                                 }
 756                         }
 757                         break;
 758                 case 's':
 759                         is_https = 1;
 760                         break;
 761                 default:
 762                         fprintf(stderr, "usage: webcit "
 763                                 "[-i ip_addr] [-p http_port] "
 764                                 "[-t tracefile] [-c] [-f] "
 765                                 "[-T Templatedebuglevel] "
 766                                 "[-d] "
 767 #ifdef HAVE_OPENSSL
 768                                 "[-s] "
 769 #endif
 770                                 "[remotehost [remoteport]]\n");
 771                         return 1;
 772                 }
 773
 774         if (optind < argc) {
 775                 ctdlhost = argv[optind];
 776                 if (++optind < argc)
 777                         ctdlport = argv[optind];
 778         }
 779
 780         /* daemonize, if we were asked to */
 781         if (running_as_daemon) {
 782                 start_daemon(pidfile);
 783         }
 784         else {
 785 ///             signal(SIGTERM, graceful_shutdown);
 786                 signal(SIGHUP, graceful_shutdown);
 787         }
 788
 789         /* Tell 'em who's in da house */
 790         lprintf(1, PACKAGE_STRING "\n");
 791         lprintf(1, "Copyright (C) 1996-2008 by the Citadel development team.\n"
 792                 "This software is distributed under the terms of the "
 793                 "GNU General Public License.\n\n"
 794         );
 795
 796
 797         /* initialize the International Bright Young Thing */
 798 #ifdef ENABLE_NLS
 799         initialize_locales();
 800
 801         locale = setlocale(LC_ALL, "");
 802
 803         mo = malloc(strlen(webcitdir) + 20);
 804         lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
 805         free(mo);
 806         lprintf(9, "Text domain: %s\n", textdomain("webcit"));
 807         lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
 808         preset_locale();
 809 #endif
 810
 811
 812         /* calculate all our path on a central place */
 813     /* where to keep our config */
 814
 815 #define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
 816         snprintf(SUBDIR,sizeof SUBDIR,  "%s%s%s%s%s%s%s", \
 817                          (home&!relh)?webcitdir:basedir, \
 818              ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
 819              ((basedir!=webcitdir)&(home&!relh))?"/":"", \
 820                          relhome, \
 821              (relhome[0]!='\0')?"/":"",\
 822                          dirbuffer,\
 823                          (dirbuffer[0]!='\0')?"/":"");
 824         basedir=RUNDIR;
 825         COMPUTE_DIRECTORY(socket_dir);
 826         basedir=WWWDIR "/static";
 827         COMPUTE_DIRECTORY(static_dir);
 828         basedir=WWWDIR "/static/icons";
 829         COMPUTE_DIRECTORY(static_icon_dir);
 830         basedir=WWWDIR "/static.local";
 831         COMPUTE_DIRECTORY(static_local_dir);
 832
 833         snprintf(file_crpt_file_key,
 834                  sizeof file_crpt_file_key,
 835                  "%s/citadel.key",
 836                  ctdl_key_dir);
 837         snprintf(file_crpt_file_csr,
 838                  sizeof file_crpt_file_csr,
 839                  "%s/citadel.csr",
 840                  ctdl_key_dir);
 841         snprintf(file_crpt_file_cer,
 842                  sizeof file_crpt_file_cer,
 843                  "%s/citadel.cer",
 844                  ctdl_key_dir);
 845
 846         /* we should go somewhere we can leave our coredump, if enabled... */
 847         lprintf(9, "Changing directory to %s\n", socket_dir);
 848         if (chdir(webcitdir) != 0) {
 849                 perror("chdir");
 850         }
 851         LoadIconDir(static_icon_dir);
 852         InitTemplateCache();
 853
 854         initialise_modules();
 855         initialize_viewdefs();
 856         initialize_axdefs();
 857
 858         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 859         icalerror_errors_are_fatal = 0;
 860
 861         /*
 862          * Set up a place to put thread-specific data.
 863          * We only need a single pointer per thread - it points to the
 864          * wcsession struct to which the thread is currently bound.
 865          */
 866         if (pthread_key_create(&MyConKey, NULL) != 0) {
 867                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 868         }
 869         InitialiseSemaphores ();
 870
 871         /*
 872          * Set up a place to put thread-specific SSL data.
 873          * We don't stick this in the wcsession struct because SSL starts
 874          * up before the session is bound, and it gets torn down between
 875          * transactions.
 876          */
 877 #ifdef HAVE_OPENSSL
 878         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 879                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 880         }
 881 #endif
 882
 883         /*
 884          * Bind the server to our favorite port.
 885          * There is no need to check for errors, because ig_tcp_server()
 886          * exits if it doesn't succeed.
 887          */
 888
 889         if (!IsEmptyStr(uds_listen_path)) {
 890                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 891                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 892         }
 893         else {
 894                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 895                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 896         }
 897
 898         lprintf(2, "Listening on socket %d\n", msock);
 899         signal(SIGPIPE, SIG_IGN);
 900
 901         pthread_mutex_init(&SessionListMutex, NULL);
 902
 903         /*
 904          * Start up the housekeeping thread
 905          */
 906         pthread_attr_init(&attr);
 907         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 908         pthread_create(&SessThread, &attr,
 909                        (void *(*)(void *)) housekeeping_loop, NULL);
 910
 911
 912         /*
 913          * If this is an HTTPS server, fire up SSL
 914          */
 915 #ifdef HAVE_OPENSSL
 916         if (is_https) {
 917                 init_ssl();
 918         }
 919 #endif
 920
 921         /* Start a few initial worker threads */
 922         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 923                 spawn_another_worker_thread();
 924         }
 925
 926         /* now the original thread becomes another worker */
 927         worker_entry();
 928         ShutDownLibCitadel ();
 929         DeleteHash(&HandlerHash);
 930         DeleteHash(&PreferenceHooks);
 931         return 0;
 932 }
 933
 934
 935 void ShutDownWebcit(void)
 936 {
 937         DeleteHash(&ZoneHash);
 938         free_zone_directory ();
 939         icaltimezone_release_zone_tab ();
 940         icalmemory_free_ring ();
 941         ShutDownLibCitadel ();
 942         DeleteHash(&HandlerHash);
 943         DeleteHash(&PreferenceHooks);
 944         DeleteHash(&GlobalNS);
 945         DeleteHash(&WirelessTemplateCache);
 946         DeleteHash(&WirelessLocalTemplateCache);
 947         DeleteHash(&TemplateCache);
 948         DeleteHash(&LocalTemplateCache);
 949         DeleteHash(&Iterators);
 950         DeleteHash(&Contitionals);
 951 #ifdef ENABLE_NLS
 952         ShutdownLocale();
 953 #endif
 954 #ifdef HAVE_OPENSSL
 955         if (is_https) {
 956                 shutdown_ssl();
 957         }
 958 #endif
 959 }
 960
 961 /*
 962  * Entry point for worker threads
 963  */
 964 void worker_entry(void)
 965 {
 966         int ssock;
 967         int i = 0;
 968         int fail_this_transaction = 0;
 969         int ret;
 970         struct timeval tv;
 971         fd_set readset, tempset;
 972
 973         tv.tv_sec = 0;
 974         tv.tv_usec = 10000;
 975         FD_ZERO(&readset);
 976         FD_SET(msock, &readset);
 977
 978         do {
 979                 /* Only one thread can accept at a time */
 980                 fail_this_transaction = 0;
 981                 ssock = -1;
 982                 errno = EAGAIN;
 983                 do {
 984                         ret = -1; /* just one at once should select... */
 985                         begin_critical_section(S_SELECT);
 986
 987                         FD_ZERO(&tempset);
 988                         if (msock > 0) FD_SET(msock, &tempset);
 989                         tv.tv_sec = 0;
 990                         tv.tv_usec = 10000;
 991                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
 992                         end_critical_section(S_SELECT);
 993                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
 994                         {// EINTR and EAGAIN are thrown but not of interest.
 995                                 lprintf(2, "accept() failed:%d %s\n",
 996                                         errno, strerror(errno));
 997                         }
 998                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
 999                         {// Successfully selected, and still not shutting down? Accept!
1000                                 ssock = accept(msock, NULL, 0);
1001                         }
1002
1003                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
1004
1005                 if ((msock == -1)||(time_to_die))
1006                 {// ok, we're going down.
1007                         int shutdown = 0;
1008
1009                         /* the first to come here will have to do the cleanup.
1010                          * make shure its realy just one.
1011                          */
1012                         begin_critical_section(S_SHUTDOWN);
1013                         if (msock == -1)
1014                         {
1015                                 msock = -2;
1016                                 shutdown = 1;
1017                         }
1018                         end_critical_section(S_SHUTDOWN);
1019                         if (shutdown == 1)
1020                         {// we're the one to cleanup the mess.
1021                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
1022                                 shutdown_sessions();
1023                                 lprintf(2, "master shutdown: waiting for others\n");
1024                                 sleeeeeeeeeep(1); // wait so some others might finish...
1025                                 lprintf(2, "master shutdown: cleaning up sessions\n");
1026                                 do_housekeeping();
1027                                 lprintf(2, "master shutdown: cleaning up libical\n");
1028
1029                                 ShutDownWebcit();
1030
1031                                 lprintf(2, "master shutdown exiting!.\n");
1032                                 exit(0);
1033                         }
1034                         break;
1035                 }
1036                 if (ssock < 0 ) continue;
1037
1038                 if (msock < 0) {
1039                         if (ssock > 0) close (ssock);
1040                         lprintf(2, "inbetween.");
1041                         pthread_exit(NULL);
1042                 } else { // Got it? do some real work!
1043                         /* Set the SO_REUSEADDR socket option */
1044                         i = 1;
1045                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
1046                                    &i, sizeof(i));
1047
1048                         /* If we are an HTTPS server, go crypto now. */
1049 #ifdef HAVE_OPENSSL
1050                         if (is_https) {
1051                                 if (starttls(ssock) != 0) {
1052                                         fail_this_transaction = 1;
1053                                         close(ssock);
1054                                 }
1055                         }
1056 #endif
1057
1058                         if (fail_this_transaction == 0) {
1059
1060                                 /* Perform an HTTP transaction... */
1061                                 context_loop(&ssock);
1062
1063                                 /* Shut down SSL/TLS if required... */
1064 #ifdef HAVE_OPENSSL
1065                                 if (is_https) {
1066                                         endtls();
1067                                 }
1068 #endif
1069
1070                                 /* ...and close the socket. */
1071                                 if (ssock > 0)
1072                                         lingering_close(ssock);
1073                         }
1074
1075                 }
1076
1077         } while (!time_to_die);
1078
1079         lprintf (1, "bye\n");
1080         pthread_exit(NULL);
1081 }
1082
1083 /*
1084  * print log messages
1085  * logs to stderr if loglevel is lower than the verbosity set at startup
1086  *
1087  * loglevel     level of the message
1088  * format       the printf like format string
1089  * ...          the strings to put into format
1090  */
1091 int lprintf(int loglevel, const char *format, ...)
1092 {
1093         va_list ap;
1094
1095         if (loglevel <= verbosity) {
1096                 va_start(ap, format);
1097                 vfprintf(stderr, format, ap);
1098                 va_end(ap);
1099                 fflush(stderr);
1100         }
1101         return 1;
1102 }
1103
1104
1105 /*
1106  * print the actual stack frame.
1107  */
1108 void wc_backtrace(void)
1109 {
1110 #ifdef HAVE_BACKTRACE
1111         void *stack_frames[50];
1112         size_t size, i;
1113         char **strings;
1114
1115
1116         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
1117         strings = backtrace_symbols(stack_frames, size);
1118         for (i = 0; i < size; i++) {
1119                 if (strings != NULL)
1120                         lprintf(1, "%s\n", strings[i]);
1121                 else
1122                         lprintf(1, "%p\n", stack_frames[i]);
1123         }
1124         free(strings);
1125 #endif
1126 }
1127