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