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