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