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         #ifndef __APPLE__
 117         fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
 118                                           there should be a preceding F_GETFL
 119                                           and a bitwise OR with the previous
 120                                           fd flags */
 121         #endif
 122
 123         if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 124                 lprintf(1, "Can't bind: %s\n", strerror(errno));
 125                 exit(WC_EXIT_BIND);
 126         }
 127         if (listen(s, queue_len) < 0) {
 128                 lprintf(1, "Can't listen: %s\n", strerror(errno));
 129                 exit(WC_EXIT_BIND);
 130         }
 131         return (s);
 132 }
 133
 134
 135
 136 /*
 137  * Create a Unix domain socket and listen on it
 138  * sockpath - file name of the unix domain socket
 139  * queue_len - Number of incoming connections to allow in the queue
 140  */
 141 int ig_uds_server(char *sockpath, int queue_len)
 142 {
 143         struct sockaddr_un addr;
 144         int s;
 145         int i;
 146         int actual_queue_len;
 147
 148         actual_queue_len = queue_len;
 149         if (actual_queue_len < 5) actual_queue_len = 5;
 150
 151         i = unlink(sockpath);
 152         if ((i != 0) && (errno != ENOENT)) {
 153                 lprintf(1, "webcit: can't unlink %s: %s\n",
 154                         sockpath, strerror(errno));
 155                 exit(WC_EXIT_BIND);
 156         }
 157
 158         memset(&addr, 0, sizeof(addr));
 159         addr.sun_family = AF_UNIX;
 160         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 161
 162         s = socket(AF_UNIX, SOCK_STREAM, 0);
 163         if (s < 0) {
 164                 lprintf(1, "webcit: Can't create a socket: %s\n",
 165                         strerror(errno));
 166                 exit(WC_EXIT_BIND);
 167         }
 168
 169         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 170                 lprintf(1, "webcit: Can't bind: %s\n",
 171                         strerror(errno));
 172                 exit(WC_EXIT_BIND);
 173         }
 174
 175         if (listen(s, actual_queue_len) < 0) {
 176                 lprintf(1, "webcit: Can't listen: %s\n",
 177                         strerror(errno));
 178                 exit(WC_EXIT_BIND);
 179         }
 180
 181         chmod(sockpath, 0777);
 182         return(s);
 183 }
 184
 185
 186
 187
 188 /*
 189  * Read data from the client socket.
 190  *
 191  * sock         socket fd to read from
 192  * buf          buffer to read into
 193  * bytes        number of bytes to read
 194  * timeout      Number of seconds to wait before timing out
 195  *
 196  * Possible return values:
 197  *      1       Requested number of bytes has been read.
 198  *      0       Request timed out.
 199  *      -1      Connection is broken, or other error.
 200  */
 201 int client_read_to(int *sock, StrBuf *Target, StrBuf *Buf, int bytes, int timeout)
 202 {
 203         const char *Error;
 204         int retval = 0;
 205
 206 #ifdef HAVE_OPENSSL
 207         if (is_https) {
 208                 while ((StrLength(Buf) + StrLength(Target) < bytes) &&
 209                        (retval >= 0))
 210                         retval = client_read_sslbuffer(Buf, timeout);
 211                 if (retval >= 0) {
 212                         StrBufAppendBuf(Target, Buf, 0); /// todo: Buf > bytes?
 213 #ifdef HTTP_TRACING
 214                         write(2, "\033[32m", 5);
 215                         write(2, buf, bytes);
 216                         write(2, "\033[30m", 5);
 217 #endif
 218                         return 1;
 219                 }
 220                 else {
 221                         lprintf(2, "client_read_ssl() failed\n");
 222                         return -1;
 223                 }
 224         }
 225 #endif
 226
 227         if (StrLength(Buf) > 0) {//// todo: what if Buf > bytes?
 228                 StrBufAppendBuf(Target, Buf, 0);
 229         }
 230         retval = StrBufReadBLOB(Target,
 231                            sock,
 232                            (StrLength(Target) > 0),
 233                            bytes - StrLength(Target),
 234                                 &Error);
 235         if (retval < 0) {
 236                 lprintf(2, "client_read() failed: %s\n",
 237                         Error);
 238                 return retval;
 239         }
 240
 241 #ifdef HTTP_TRACING
 242         write(2, "\033[32m", 5);
 243         write(2, buf, bytes);
 244         write(2, "\033[30m", 5);
 245 #endif
 246         return 1;
 247 }
 248
 249
 250 /*
 251  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 252  */
 253 void begin_burst(void)
 254 {
 255         if (WC->WBuf == NULL)
 256                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 257 }
 258
 259
 260 /*
 261  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 262  */
 263 long end_burst(void)
 264 {
 265         struct wcsession *WCC = WC;
 266         const char *ptr, *eptr;
 267         long count;
 268         ssize_t res;
 269         fd_set wset;
 270         int fdflags;
 271
 272 #ifdef HAVE_ZLIB
 273         /* Perform gzip compression, if enabled and supported by client */
 274         if ((WCC->gzip_ok) && CompressBuffer(WCC->WBuf))
 275         {
 276                 hprintf("Content-encoding: gzip\r\n");
 277         }
 278 #endif  /* HAVE_ZLIB */
 279
 280         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 281
 282         ptr = ChrPtr(WCC->HBuf);
 283         count = StrLength(WCC->HBuf);
 284         eptr = ptr + count;
 285
 286 #ifdef HAVE_OPENSSL
 287         if (is_https) {
 288                 client_write_ssl(WCC->HBuf);
 289                 client_write_ssl(WCC->WBuf);
 290                 return (count);
 291         }
 292 #endif
 293
 294
 295 #ifdef HTTP_TRACING
 296
 297         write(2, "\033[34m", 5);
 298         write(2, ptr, StrLength(WCC->WBuf));
 299         write(2, "\033[30m", 5);
 300 #endif
 301         fdflags = fcntl(WC->http_sock, F_GETFL);
 302
 303         while (ptr < eptr) {
 304                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 305                         FD_ZERO(&wset);
 306                         FD_SET(WCC->http_sock, &wset);
 307                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 308                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 309                                 return -1;
 310                         }
 311                 }
 312
 313                 if ((res = write(WCC->http_sock,
 314                                  ptr,
 315                                  count)) == -1) {
 316                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 317                         wc_backtrace();
 318                         return res;
 319                 }
 320                 count -= res;
 321                 ptr += res;
 322         }
 323
 324         ptr = ChrPtr(WCC->WBuf);
 325         count = StrLength(WCC->WBuf);
 326         eptr = ptr + count;
 327
 328 #ifdef HTTP_TRACING
 329
 330         write(2, "\033[34m", 5);
 331         write(2, ptr, StrLength(WCC->WBuf));
 332         write(2, "\033[30m", 5);
 333 #endif
 334
 335         while (ptr < eptr) {
 336                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 337                         FD_ZERO(&wset);
 338                         FD_SET(WCC->http_sock, &wset);
 339                         if (select(WCC->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 340                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 341                                 return -1;
 342                         }
 343                 }
 344
 345                 if ((res = write(WCC->http_sock,
 346                                  ptr,
 347                                  count)) == -1) {
 348                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 349                         wc_backtrace();
 350                         return res;
 351                 }
 352                 count -= res;
 353                 ptr += res;
 354         }
 355
 356         return StrLength(WCC->WBuf);
 357 }
 358
 359
 360
 361 /*
 362  * Read data from the client socket with default timeout.
 363  * (This is implemented in terms of client_read_to() and could be
 364  * justifiably moved out of sysdep.c)
 365  *
 366  * sock         the socket fd to read from
 367  * buf          the buffer to write to
 368  * bytes        Number of bytes to read
 369  */
 370 int client_read(int *sock, StrBuf *Target, StrBuf *buf, int bytes)
 371 {
 372         return (client_read_to(sock, Target, buf, bytes, SLEEPING));
 373 }
 374
 375
 376 /*
 377  * Get a LF-terminated line of text from the client.
 378  * (This is implemented in terms of client_read() and could be
 379  * justifiably moved out of sysdep.c)
 380  *
 381  * sock         socket fd to get client line from
 382  * buf          buffer to write read data to
 383  * bufsiz       how many bytes to read
 384  *
 385  * returns the number of bytes read
 386  */
 387 /////int client_getln(int *sock, char *buf, int bufsiz)
 388 /////{
 389 /////   int i, retval;
 390 /////
 391 /////   /* Read one character at a time.*/
 392 /////   for (i = 0; *sock > 0; i++) {
 393 /////           retval = client_read(sock, &buf[i], 1);
 394 /////           if (retval < 0)
 395 /////                   return retval;
 396 /////           if (retval != 1 || buf[i] == '\n' || i == (bufsiz-1))
 397 /////                   break;
 398 /////           if ( (!isspace(buf[i])) && (!isprint(buf[i])) ) {
 399 /////                   /* Non printable character recieved from client */
 400 /////                   return(-1);
 401 /////           }
 402 /////   }
 403 /////
 404 /////   /* If we got a long line, discard characters until the newline. */
 405 /////   if (i == (bufsiz-1))
 406 /////           while (buf[i] != '\n' && retval == 1)
 407 /////                   retval = client_read(sock, &buf[i], 1);
 408 /////
 409 /////   /*
 410 /////    * Strip any trailing non-printable characters.
 411 /////    */
 412 /////   buf[i] = 0;
 413 /////   while ((i > 0) && (!isprint(buf[i - 1]))) {
 414 /////           buf[--i] = 0;
 415 /////   }
 416 /////   return (retval);
 417 /////}
 418
 419 /*
 420  * Shut us down the regular way.
 421  * signum is the signal we want to forward
 422  */
 423 pid_t current_child;
 424 void graceful_shutdown_watcher(int signum) {
 425         lprintf (1, "bye; shutting down watcher.");
 426         kill(current_child, signum);
 427         if (signum != SIGHUP)
 428                 exit(0);
 429 }
 430
 431
 432 int ClientGetLine(int *sock, StrBuf *Target, StrBuf *CLineBuf)
 433 {
 434         const char *Error, *pch, *pchs;
 435         int rlen, len, retval = 0;
 436
 437         if (is_https) {
 438                 int ntries = 0;
 439                 if (StrLength(CLineBuf) > 0) {
 440                         pchs = ChrPtr(CLineBuf);
 441                         pch = strchr(pchs, '\n');
 442                         if (pch != NULL) {
 443                                 rlen = 0;
 444                                 len = pch - pchs;
 445                                 if (len > 0 && (*(pch - 1) == '\r') )
 446                                         rlen ++;
 447                                 StrBufSub(Target, CLineBuf, 0, len - rlen);
 448                                 StrBufCutLeft(CLineBuf, len + 1);
 449                                 return len - rlen;
 450                         }
 451                 }
 452
 453                 while (retval == 0) {
 454                                 pch = NULL;
 455                                 pchs = ChrPtr(CLineBuf);
 456                                 if (*pchs != '\0')
 457                                         pch = strchr(pchs, '\n');
 458                                 if (pch == NULL) {
 459                                         retval = client_read_sslbuffer(CLineBuf, SLEEPING);
 460                                         pchs = ChrPtr(CLineBuf);
 461                                         pch = strchr(pchs, '\n');
 462                                 }
 463                                 if (retval == 0) {
 464                                         sleeeeeeeeeep(1);
 465                                         ntries ++;
 466                                 }
 467                                 if (ntries > 10)
 468                                         return 0;
 469                 }
 470                 if ((retval > 0) && (pch != NULL)) {
 471                         rlen = 0;
 472                         len = pch - pchs;
 473                         if (len > 0 && (*(pch - 1) == '\r') )
 474                                 rlen ++;
 475                         StrBufSub(Target, CLineBuf, 0, len - rlen);
 476                         StrBufCutLeft(CLineBuf, len + 1);
 477                         return len - rlen;
 478
 479                 }
 480                 else
 481                         return -1;
 482         }
 483         else
 484                 return StrBufTCP_read_buffered_line(Target,
 485                                                     CLineBuf,
 486                                                     sock,
 487                                                     5,
 488                                                     1,
 489                                                     &Error);
 490 }
 491
 492
 493
 494 /*
 495  * Shut us down the regular way.
 496  * signum is the signal we want to forward
 497  */
 498 pid_t current_child;
 499 void graceful_shutdown(int signum) {
 500 //      kill(current_child, signum);
 501         char wd[SIZ];
 502         FILE *FD;
 503         int fd;
 504         getcwd(wd, SIZ);
 505         lprintf (1, "bye going down gracefull.[%d][%s]\n", signum, wd);
 506         fd = msock;
 507         msock = -1;
 508         time_to_die = 1;
 509         FD=fdopen(fd, "a+");
 510         fflush (FD);
 511         fclose (FD);
 512         close(fd);
 513 }
 514
 515
 516 /*
 517  * Start running as a daemon.
 518  */
 519 void start_daemon(char *pid_file)
 520 {
 521         int status = 0;
 522         pid_t child = 0;
 523         FILE *fp;
 524         int do_restart = 0;
 525
 526         current_child = 0;
 527
 528         /* Close stdin/stdout/stderr and replace them with /dev/null.
 529          * We don't just call close() because we don't want these fd's
 530          * to be reused for other files.
 531          */
 532         chdir("/");
 533
 534         signal(SIGHUP, SIG_IGN);
 535         signal(SIGINT, SIG_IGN);
 536         signal(SIGQUIT, SIG_IGN);
 537
 538         child = fork();
 539         if (child != 0) {
 540                 exit(0);
 541         }
 542
 543         setsid();
 544         umask(0);
 545         freopen("/dev/null", "r", stdin);
 546         freopen("/dev/null", "w", stdout);
 547         freopen("/dev/null", "w", stderr);
 548         signal(SIGTERM, graceful_shutdown_watcher);
 549         signal(SIGHUP, graceful_shutdown_watcher);
 550
 551         do {
 552                 current_child = fork();
 553
 554
 555                 if (current_child < 0) {
 556                         perror("fork");
 557                         ShutDownLibCitadel ();
 558                         exit(errno);
 559                 }
 560
 561                 else if (current_child == 0) {  // child process
 562 //                      signal(SIGTERM, graceful_shutdown);
 563                         signal(SIGHUP, graceful_shutdown);
 564
 565                         return; /* continue starting webcit. */
 566                 }
 567
 568                 else { // watcher process
 569 //                      signal(SIGTERM, SIG_IGN);
 570 //                      signal(SIGHUP, SIG_IGN);
 571                         if (pid_file) {
 572                                 fp = fopen(pid_file, "w");
 573                                 if (fp != NULL) {
 574                                         fprintf(fp, "%d\n", getpid());
 575                                         fclose(fp);
 576                                 }
 577                         }
 578                         waitpid(current_child, &status, 0);
 579                 }
 580
 581                 do_restart = 0;
 582
 583                 /* Did the main process exit with an actual exit code? */
 584                 if (WIFEXITED(status)) {
 585
 586                         /* Exit code 0 means the watcher should exit */
 587                         if (WEXITSTATUS(status) == 0) {
 588                                 do_restart = 0;
 589                         }
 590
 591                         /* Exit code 101-109 means the watcher should exit */
 592                         else if ( (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109) ) {
 593                                 do_restart = 0;
 594                         }
 595
 596                         /* Any other exit code means we should restart. */
 597                         else {
 598                                 do_restart = 1;
 599                         }
 600                 }
 601
 602                 /* Any other type of termination (signals, etc.) should also restart. */
 603                 else {
 604                         do_restart = 1;
 605                 }
 606
 607         } while (do_restart);
 608
 609         if (pid_file) {
 610                 unlink(pid_file);
 611         }
 612         ShutDownLibCitadel ();
 613         exit(WEXITSTATUS(status));
 614 }
 615
 616 /*
 617  * Spawn an additional worker thread into the pool.
 618  */
 619 void spawn_another_worker_thread()
 620 {
 621         pthread_t SessThread;   /* Thread descriptor */
 622         pthread_attr_t attr;    /* Thread attributes */
 623         int ret;
 624
 625         lprintf(3, "Creating a new thread\n");
 626
 627         /* set attributes for the new thread */
 628         pthread_attr_init(&attr);
 629         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 630
 631         /*
 632          * Our per-thread stacks need to be bigger than the default size, otherwise
 633          * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
 634          * 64-bit Linux.
 635          */
 636         if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
 637                 lprintf(1, "pthread_attr_setstacksize: %s\n",
 638                         strerror(ret));
 639                 pthread_attr_destroy(&attr);
 640         }
 641
 642         /* now create the thread */
 643         if (pthread_create(&SessThread, &attr,
 644                            (void *(*)(void *)) worker_entry, NULL)
 645             != 0) {
 646                 lprintf(1, "Can't create thread: %s\n", strerror(errno));
 647         }
 648
 649         /* free up the attributes */
 650         pthread_attr_destroy(&attr);
 651 }
 652
 653 //#define DBG_PRINNT_HOOKS_AT_START
 654 #ifdef DBG_PRINNT_HOOKS_AT_START
 655 const char foobuf[32];
 656 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
 657 #endif
 658 void InitTemplateCache(void);
 659 extern int LoadTemplates;
 660 extern void LoadZoneFiles(void);
 661
 662 /*
 663  * Here's where it all begins.
 664  */
 665 int main(int argc, char **argv)
 666 {
 667         pthread_t SessThread;           /* Thread descriptor */
 668         pthread_attr_t attr;            /* Thread attributes */
 669         int a, i;                       /* General-purpose variables */
 670         char tracefile[PATH_MAX];
 671         char ip_addr[256]="0.0.0.0";
 672         char dirbuffer[PATH_MAX]="";
 673         int relh=0;
 674         int home=0;
 675         int home_specified=0;
 676         char relhome[PATH_MAX]="";
 677         char webcitdir[PATH_MAX] = DATADIR;
 678         char *pidfile = NULL;
 679         char *hdir;
 680         const char *basedir;
 681 #ifdef ENABLE_NLS
 682         char *locale = NULL;
 683         char *mo = NULL;
 684 #endif /* ENABLE_NLS */
 685         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
 686
 687         HandlerHash = NewHash(1, NULL);
 688         PreferenceHooks = NewHash(1, NULL);
 689         WirelessTemplateCache = NewHash(1, NULL);
 690         WirelessLocalTemplateCache = NewHash(1, NULL);
 691         LocalTemplateCache = NewHash(1, NULL);
 692         TemplateCache = NewHash(1, NULL);
 693         GlobalNS = NewHash(1, NULL);
 694         Iterators = NewHash(1, NULL);
 695         Contitionals = NewHash(1, NULL);
 696         LoadZoneFiles();
 697
 698
 699 #ifdef DBG_PRINNT_HOOKS_AT_START
 700         dbg_PrintHash(HandlerHash, nix, NULL);
 701 #endif
 702
 703         /* Ensure that we are linked to the correct version of libcitadel */
 704         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 705                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 706                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 707                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 708                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 709                 return(1);
 710         }
 711
 712         strcpy(uds_listen_path, "");
 713
 714         /* Parse command line */
 715 #ifdef HAVE_OPENSSL
 716         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:cfs")) != EOF)
 717 #else
 718         while ((a = getopt(argc, argv, "h:i:p:t:T:x:dD:cf")) != EOF)
 719 #endif
 720                 switch (a) {
 721                 case 'h':
 722                         hdir = strdup(optarg);
 723                         relh=hdir[0]!='/';
 724                         if (!relh) safestrncpy(webcitdir, hdir,
 725                                                                    sizeof webcitdir);
 726                         else
 727                                 safestrncpy(relhome, relhome,
 728                                                         sizeof relhome);
 729                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 730                         home_specified = 1;
 731                         home=1;
 732                         break;
 733                 case 'd':
 734                         running_as_daemon = 1;
 735                         break;
 736                 case 'D':
 737                         pidfile = strdup(optarg);
 738                         running_as_daemon = 1;
 739                         break;
 740                 case 'i':
 741                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 742                         break;
 743                 case 'p':
 744                         http_port = atoi(optarg);
 745                         if (http_port == 0) {
 746                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 747                         }
 748                         break;
 749                 case 't':
 750                         safestrncpy(tracefile, optarg, sizeof tracefile);
 751                         freopen(tracefile, "w", stdout);
 752                         freopen(tracefile, "w", stderr);
 753                         freopen(tracefile, "r", stdin);
 754                         break;
 755                 case 'T':
 756                         LoadTemplates = atoi(optarg);
 757                         break;
 758                 case 'x':
 759                         verbosity = atoi(optarg);
 760                         break;
 761                 case 'f':
 762                         follow_xff = 1;
 763                         break;
 764                 case 'c':
 765                         server_cookie = malloc(256);
 766                         if (server_cookie != NULL) {
 767                                 safestrncpy(server_cookie,
 768                                        "Set-cookie: wcserver=",
 769                                         256);
 770                                 if (gethostname
 771                                     (&server_cookie[strlen(server_cookie)],
 772                                      200) != 0) {
 773                                         lprintf(2, "gethostname: %s\n",
 774                                                 strerror(errno));
 775                                         free(server_cookie);
 776                                 }
 777                         }
 778                         break;
 779                 case 's':
 780                         is_https = 1;
 781                         break;
 782                 default:
 783                         fprintf(stderr, "usage: webcit "
 784                                 "[-i ip_addr] [-p http_port] "
 785                                 "[-t tracefile] [-c] [-f] "
 786                                 "[-T Templatedebuglevel] "
 787                                 "[-d] "
 788 #ifdef HAVE_OPENSSL
 789                                 "[-s] "
 790 #endif
 791                                 "[remotehost [remoteport]]\n");
 792                         return 1;
 793                 }
 794
 795         if (optind < argc) {
 796                 ctdlhost = argv[optind];
 797                 if (++optind < argc)
 798                         ctdlport = argv[optind];
 799         }
 800
 801         /* daemonize, if we were asked to */
 802         if (running_as_daemon) {
 803                 start_daemon(pidfile);
 804         }
 805         else {
 806 ///             signal(SIGTERM, graceful_shutdown);
 807                 signal(SIGHUP, graceful_shutdown);
 808         }
 809
 810         /* Tell 'em who's in da house */
 811         lprintf(1, PACKAGE_STRING "\n");
 812         lprintf(1, "Copyright (C) 1996-2008 by the Citadel development team.\n"
 813                 "This software is distributed under the terms of the "
 814                 "GNU General Public License.\n\n"
 815         );
 816
 817
 818         /* initialize the International Bright Young Thing */
 819 #ifdef ENABLE_NLS
 820         initialize_locales();
 821
 822         locale = setlocale(LC_ALL, "");
 823
 824         mo = malloc(strlen(webcitdir) + 20);
 825         lprintf(9, "Message catalog directory: %s\n", bindtextdomain("webcit", LOCALEDIR"/locale"));
 826         free(mo);
 827         lprintf(9, "Text domain: %s\n", textdomain("webcit"));
 828         lprintf(9, "Text domain Charset: %s\n", bind_textdomain_codeset("webcit","UTF8"));
 829         preset_locale();
 830 #endif
 831
 832
 833         /* calculate all our path on a central place */
 834     /* where to keep our config */
 835
 836 #define COMPUTE_DIRECTORY(SUBDIR) memcpy(dirbuffer,SUBDIR, sizeof dirbuffer);\
 837         snprintf(SUBDIR,sizeof SUBDIR,  "%s%s%s%s%s%s%s", \
 838                          (home&!relh)?webcitdir:basedir, \
 839              ((basedir!=webcitdir)&(home&!relh))?basedir:"/", \
 840              ((basedir!=webcitdir)&(home&!relh))?"/":"", \
 841                          relhome, \
 842              (relhome[0]!='\0')?"/":"",\
 843                          dirbuffer,\
 844                          (dirbuffer[0]!='\0')?"/":"");
 845         basedir=RUNDIR;
 846         COMPUTE_DIRECTORY(socket_dir);
 847         basedir=WWWDIR "/static";
 848         COMPUTE_DIRECTORY(static_dir);
 849         basedir=WWWDIR "/static/icons";
 850         COMPUTE_DIRECTORY(static_icon_dir);
 851         basedir=WWWDIR "/static.local";
 852         COMPUTE_DIRECTORY(static_local_dir);
 853
 854         snprintf(file_crpt_file_key,
 855                  sizeof file_crpt_file_key,
 856                  "%s/citadel.key",
 857                  ctdl_key_dir);
 858         snprintf(file_crpt_file_csr,
 859                  sizeof file_crpt_file_csr,
 860                  "%s/citadel.csr",
 861                  ctdl_key_dir);
 862         snprintf(file_crpt_file_cer,
 863                  sizeof file_crpt_file_cer,
 864                  "%s/citadel.cer",
 865                  ctdl_key_dir);
 866
 867         /* we should go somewhere we can leave our coredump, if enabled... */
 868         lprintf(9, "Changing directory to %s\n", socket_dir);
 869         if (chdir(webcitdir) != 0) {
 870                 perror("chdir");
 871         }
 872         LoadIconDir(static_icon_dir);
 873         InitTemplateCache();
 874
 875         initialise_modules();
 876         initialize_viewdefs();
 877         initialize_axdefs();
 878
 879         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 880         icalerror_errors_are_fatal = 0;
 881
 882         /*
 883          * Set up a place to put thread-specific data.
 884          * We only need a single pointer per thread - it points to the
 885          * wcsession struct to which the thread is currently bound.
 886          */
 887         if (pthread_key_create(&MyConKey, NULL) != 0) {
 888                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 889         }
 890         InitialiseSemaphores ();
 891
 892         /*
 893          * Set up a place to put thread-specific SSL data.
 894          * We don't stick this in the wcsession struct because SSL starts
 895          * up before the session is bound, and it gets torn down between
 896          * transactions.
 897          */
 898 #ifdef HAVE_OPENSSL
 899         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 900                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 901         }
 902 #endif
 903
 904         /*
 905          * Bind the server to our favorite port.
 906          * There is no need to check for errors, because ig_tcp_server()
 907          * exits if it doesn't succeed.
 908          */
 909
 910         if (!IsEmptyStr(uds_listen_path)) {
 911                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 912                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 913         }
 914         else {
 915                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 916                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 917         }
 918
 919         lprintf(2, "Listening on socket %d\n", msock);
 920         signal(SIGPIPE, SIG_IGN);
 921
 922         pthread_mutex_init(&SessionListMutex, NULL);
 923
 924         /*
 925          * Start up the housekeeping thread
 926          */
 927         pthread_attr_init(&attr);
 928         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 929         pthread_create(&SessThread, &attr,
 930                        (void *(*)(void *)) housekeeping_loop, NULL);
 931
 932
 933         /*
 934          * If this is an HTTPS server, fire up SSL
 935          */
 936 #ifdef HAVE_OPENSSL
 937         if (is_https) {
 938                 init_ssl();
 939         }
 940 #endif
 941
 942         /* Start a few initial worker threads */
 943         for (i = 0; i < (MIN_WORKER_THREADS); ++i) {
 944                 spawn_another_worker_thread();
 945         }
 946
 947         /* now the original thread becomes another worker */
 948         worker_entry();
 949         ShutDownLibCitadel ();
 950         DeleteHash(&HandlerHash);
 951         DeleteHash(&PreferenceHooks);
 952         return 0;
 953 }
 954
 955
 956 void ShutDownWebcit(void)
 957 {
 958         DeleteHash(&ZoneHash);
 959         free_zone_directory ();
 960         icaltimezone_release_zone_tab ();
 961         icalmemory_free_ring ();
 962         ShutDownLibCitadel ();
 963         DeleteHash(&HandlerHash);
 964         DeleteHash(&PreferenceHooks);
 965         DeleteHash(&GlobalNS);
 966         DeleteHash(&WirelessTemplateCache);
 967         DeleteHash(&WirelessLocalTemplateCache);
 968         DeleteHash(&TemplateCache);
 969         DeleteHash(&LocalTemplateCache);
 970         DeleteHash(&Iterators);
 971         DeleteHash(&Contitionals);
 972 #ifdef ENABLE_NLS
 973         ShutdownLocale();
 974 #endif
 975 #ifdef HAVE_OPENSSL
 976         if (is_https) {
 977                 shutdown_ssl();
 978         }
 979 #endif
 980 }
 981
 982 /*
 983  * Entry point for worker threads
 984  */
 985 void worker_entry(void)
 986 {
 987         int ssock;
 988         int i = 0;
 989         int fail_this_transaction = 0;
 990         int ret;
 991         struct timeval tv;
 992         fd_set readset, tempset;
 993
 994         tv.tv_sec = 0;
 995         tv.tv_usec = 10000;
 996         FD_ZERO(&readset);
 997         FD_SET(msock, &readset);
 998
 999         do {
1000                 /* Only one thread can accept at a time */
1001                 fail_this_transaction = 0;
1002                 ssock = -1;
1003                 errno = EAGAIN;
1004                 do {
1005                         ret = -1; /* just one at once should select... */
1006                         begin_critical_section(S_SELECT);
1007
1008                         FD_ZERO(&tempset);
1009                         if (msock > 0) FD_SET(msock, &tempset);
1010                         tv.tv_sec = 0;
1011                         tv.tv_usec = 10000;
1012                         if (msock > 0)  ret = select(msock+1, &tempset, NULL, NULL,  &tv);
1013                         end_critical_section(S_SELECT);
1014                         if ((ret < 0) && (errno != EINTR) && (errno != EAGAIN))
1015                         {// EINTR and EAGAIN are thrown but not of interest.
1016                                 lprintf(2, "accept() failed:%d %s\n",
1017                                         errno, strerror(errno));
1018                         }
1019                         else if ((ret > 0) && (msock > 0) && FD_ISSET(msock, &tempset))
1020                         {// Successfully selected, and still not shutting down? Accept!
1021                                 ssock = accept(msock, NULL, 0);
1022                         }
1023
1024                 } while ((msock > 0) && (ssock < 0)  && (time_to_die == 0));
1025
1026                 if ((msock == -1)||(time_to_die))
1027                 {// ok, we're going down.
1028                         int shutdown = 0;
1029
1030                         /* the first to come here will have to do the cleanup.
1031                          * make shure its realy just one.
1032                          */
1033                         begin_critical_section(S_SHUTDOWN);
1034                         if (msock == -1)
1035                         {
1036                                 msock = -2;
1037                                 shutdown = 1;
1038                         }
1039                         end_critical_section(S_SHUTDOWN);
1040                         if (shutdown == 1)
1041                         {// we're the one to cleanup the mess.
1042                                 lprintf(2, "I'm master shutdown: tagging sessions to be killed.\n");
1043                                 shutdown_sessions();
1044                                 lprintf(2, "master shutdown: waiting for others\n");
1045                                 sleeeeeeeeeep(1); // wait so some others might finish...
1046                                 lprintf(2, "master shutdown: cleaning up sessions\n");
1047                                 do_housekeeping();
1048                                 lprintf(2, "master shutdown: cleaning up libical\n");
1049
1050                                 ShutDownWebcit();
1051
1052                                 lprintf(2, "master shutdown exiting!.\n");
1053                                 exit(0);
1054                         }
1055                         break;
1056                 }
1057                 if (ssock < 0 ) continue;
1058
1059                 if (msock < 0) {
1060                         if (ssock > 0) close (ssock);
1061                         lprintf(2, "inbetween.");
1062                         pthread_exit(NULL);
1063                 } else { // Got it? do some real work!
1064                         /* Set the SO_REUSEADDR socket option */
1065                         i = 1;
1066                         setsockopt(ssock, SOL_SOCKET, SO_REUSEADDR,
1067                                    &i, sizeof(i));
1068
1069                         /* If we are an HTTPS server, go crypto now. */
1070 #ifdef HAVE_OPENSSL
1071                         if (is_https) {
1072                                 if (starttls(ssock) != 0) {
1073                                         fail_this_transaction = 1;
1074                                         close(ssock);
1075                                 }
1076                         }
1077 #endif
1078
1079                         if (fail_this_transaction == 0) {
1080
1081                                 /* Perform an HTTP transaction... */
1082                                 context_loop(&ssock);
1083
1084                                 /* Shut down SSL/TLS if required... */
1085 #ifdef HAVE_OPENSSL
1086                                 if (is_https) {
1087                                         endtls();
1088                                 }
1089 #endif
1090
1091                                 /* ...and close the socket. */
1092                                 if (ssock > 0)
1093                                         lingering_close(ssock);
1094                         }
1095
1096                 }
1097
1098         } while (!time_to_die);
1099
1100         lprintf (1, "bye\n");
1101         pthread_exit(NULL);
1102 }
1103
1104 /*
1105  * print log messages
1106  * logs to stderr if loglevel is lower than the verbosity set at startup
1107  *
1108  * loglevel     level of the message
1109  * format       the printf like format string
1110  * ...          the strings to put into format
1111  */
1112 int lprintf(int loglevel, const char *format, ...)
1113 {
1114         va_list ap;
1115
1116         if (loglevel <= verbosity) {
1117                 va_start(ap, format);
1118                 vfprintf(stderr, format, ap);
1119                 va_end(ap);
1120                 fflush(stderr);
1121         }
1122         return 1;
1123 }
1124
1125
1126 /*
1127  * print the actual stack frame.
1128  */
1129 void wc_backtrace(void)
1130 {
1131 #ifdef HAVE_BACKTRACE
1132         void *stack_frames[50];
1133         size_t size, i;
1134         char **strings;
1135
1136
1137         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
1138         strings = backtrace_symbols(stack_frames, size);
1139         for (i = 0; i < size; i++) {
1140                 if (strings != NULL)
1141                         lprintf(1, "%s\n", strings[i]);
1142                 else
1143                         lprintf(1, "%p\n", stack_frames[i]);
1144         }
1145         free(strings);
1146 #endif
1147 }
1148