webcit/context_loop.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the other half of the webserver.  It handles the task of hooking
   5  * up HTTP requests with the sessions they belong to, using HTTP cookies to
   6  * keep track of things.  If the HTTP request doesn't belong to any currently
   7  * active session, a new session is started.
   8  *
   9  */
  10
  11 #include "webcit.h"
  12 #include "webserver.h"
  13
  14 /* Only one thread may manipulate SessionList at a time... */
  15 pthread_mutex_t SessionListMutex;
  16
  17 wcsession *SessionList = NULL; /**< our sessions ????*/
  18
  19 pthread_key_t MyConKey;         /**< TSD key for MySession() */
  20
  21
  22
  23 void DestroySession(wcsession **sessions_to_kill)
  24 {
  25         close((*sessions_to_kill)->serv_sock);
  26         close((*sessions_to_kill)->chat_sock);
  27 /*
  28 //              if ((*sessions_to_kill)->preferences != NULL) {
  29 //                      free((*sessions_to_kill)->preferences);
  30 //              }
  31 */
  32         if ((*sessions_to_kill)->cache_fold != NULL) {
  33                 free((*sessions_to_kill)->cache_fold);
  34         }
  35         DeleteServInfo(&((*sessions_to_kill)->serv_info));
  36         DeleteHash(&((*sessions_to_kill)->attachments));
  37         free_march_list((*sessions_to_kill));
  38         DeleteHash(&((*sessions_to_kill)->hash_prefs));
  39         DeleteHash(&((*sessions_to_kill)->IconBarSettings));
  40         DeleteHash(&((*sessions_to_kill)->ServCfg));
  41         FreeStrBuf(&((*sessions_to_kill)->ReadBuf));
  42         FreeStrBuf(&((*sessions_to_kill)->UrlFragment1));
  43         FreeStrBuf(&((*sessions_to_kill)->UrlFragment2));
  44         FreeStrBuf(&((*sessions_to_kill)->UrlFragment3));
  45         FreeStrBuf(&((*sessions_to_kill)->UrlFragment4));
  46         FreeStrBuf(&((*sessions_to_kill)->WBuf));
  47         FreeStrBuf(&((*sessions_to_kill)->HBuf));
  48         FreeStrBuf(&((*sessions_to_kill)->CLineBuf));
  49         FreeStrBuf(&((*sessions_to_kill)->wc_username));
  50         FreeStrBuf(&((*sessions_to_kill)->wc_fullname));
  51         FreeStrBuf(&((*sessions_to_kill)->wc_password));
  52         FreeStrBuf(&((*sessions_to_kill)->wc_roomname));
  53         FreeStrBuf(&((*sessions_to_kill)->httpauth_user));
  54         FreeStrBuf(&((*sessions_to_kill)->httpauth_pass));
  55         FreeStrBuf(&((*sessions_to_kill)->ImportantMsg));
  56         FreeStrBuf(&((*sessions_to_kill)->cs_inet_email));
  57         FreeStrBuf(&((*sessions_to_kill)->MigrateReadLineBuf));
  58         free((*sessions_to_kill));
  59         (*sessions_to_kill) = NULL;
  60 }
  61
  62 void shutdown_sessions(void)
  63 {
  64         wcsession *sptr;
  65
  66         for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
  67                         sptr->killthis = 1;
  68         }
  69 }
  70
  71 void do_housekeeping(void)
  72 {
  73         wcsession *sptr, *ss;
  74         wcsession *sessions_to_kill = NULL;
  75         int num_sessions = 0;
  76         static int num_threads = MIN_WORKER_THREADS;
  77
  78         /**
  79          * Lock the session list, moving any candidates for euthanasia into
  80          * a separate list.
  81          */
  82         pthread_mutex_lock(&SessionListMutex);
  83         num_sessions = 0;
  84         for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
  85                 ++num_sessions;
  86
  87                 /** Kill idle sessions */
  88                 if ((time(NULL) - (sptr->lastreq)) >
  89                    (time_t) WEBCIT_TIMEOUT) {
  90                         sptr->killthis = 1;
  91                 }
  92
  93                 /** Remove sessions flagged for kill */
  94                 if (sptr->killthis) {
  95
  96                         /** remove session from linked list */
  97                         if (sptr == SessionList) {
  98                                 SessionList = SessionList->next;
  99                         }
 100                         else for (ss=SessionList;ss!=NULL;ss=ss->next) {
 101                                 if (ss->next == sptr) {
 102                                         ss->next = ss->next->next;
 103                                 }
 104                         }
 105
 106                         sptr->next = sessions_to_kill;
 107                         sessions_to_kill = sptr;
 108                 }
 109         }
 110         pthread_mutex_unlock(&SessionListMutex);
 111
 112         /**
 113          * Now free up and destroy the culled sessions.
 114          */
 115         while (sessions_to_kill != NULL) {
 116                 lprintf(3, "Destroying session %d\n", sessions_to_kill->wc_session);
 117                 pthread_mutex_lock(&sessions_to_kill->SessionMutex);
 118                 pthread_mutex_unlock(&sessions_to_kill->SessionMutex);
 119                 sptr = sessions_to_kill->next;
 120
 121                 DestroySession(&sessions_to_kill);
 122                 sessions_to_kill = sptr;
 123                 --num_sessions;
 124         }
 125
 126         /**
 127          * If there are more sessions than threads, then we should spawn
 128          * more threads ... up to a predefined maximum.
 129          */
 130         while ( (num_sessions > num_threads)
 131               && (num_threads <= MAX_WORKER_THREADS) ) {
 132                 spawn_another_worker_thread();
 133                 ++num_threads;
 134                 lprintf(3, "There are %d sessions and %d threads active.\n",
 135                         num_sessions, num_threads);
 136         }
 137 }
 138
 139
 140 /*
 141  * Wake up occasionally and clean house
 142  */
 143 void housekeeping_loop(void)
 144 {
 145         while (1) {
 146                 sleeeeeeeeeep(HOUSEKEEPING);
 147                 do_housekeeping();
 148         }
 149 }
 150
 151
 152 /*
 153  * Create a Session id
 154  * Generate a unique WebCit session ID (which is not the same thing as the
 155  * Citadel session ID).
 156  */
 157 int GenerateSessionID(void)
 158 {
 159         static int seq = (-1);
 160
 161         if (seq < 0) {
 162                 seq = (int) time(NULL);
 163         }
 164
 165         return ++seq;
 166 }
 167
 168
 169 /*
 170  * lingering_close() a`la Apache. see
 171  * http://www.apache.org/docs/misc/fin_wait_2.html for rationale
 172  */
 173 int lingering_close(int fd)
 174 {
 175         char buf[SIZ];
 176         int i;
 177         fd_set set;
 178         struct timeval tv, start;
 179
 180         gettimeofday(&start, NULL);
 181         shutdown(fd, 1);
 182         do {
 183                 do {
 184                         gettimeofday(&tv, NULL);
 185                         tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
 186                         tv.tv_usec = start.tv_usec - tv.tv_usec;
 187                         if (tv.tv_usec < 0) {
 188                                 tv.tv_sec--;
 189                                 tv.tv_usec += 1000000;
 190                         }
 191                         FD_ZERO(&set);
 192                         FD_SET(fd, &set);
 193                         i = select(fd + 1, &set, NULL, NULL, &tv);
 194                 } while (i == -1 && errno == EINTR);
 195
 196                 if (i <= 0)
 197                         break;
 198
 199                 i = read(fd, buf, sizeof buf);
 200         } while (i != 0 && (i != -1 || errno == EINTR));
 201
 202         return close(fd);
 203 }
 204
 205
 206
 207 /*
 208  * Look for commonly-found probes of malware such as worms, viruses, trojans, and Microsoft Office.
 209  * Short-circuit these requests so we don't have to send them through the full processing loop.
 210  */
 211 int is_bogus(StrBuf *http_cmd) {
 212         const char *url;
 213         int i, max;
 214         const char *bogus_prefixes[] = {
 215                 "/scripts/root.exe",    /* Worms and trojans and viruses, oh my! */
 216                 "/c/winnt",
 217                 "/MSADC/",
 218                 "/_vti",                /* Broken Microsoft DAV implementation */
 219                 "/MSOffice",            /* Stoopid MSOffice thinks everyone is IIS */
 220                 "/nonexistenshit"       /* Exploit found in the wild January 2009 */
 221         };
 222
 223         url = ChrPtr(http_cmd);
 224         if (IsEmptyStr(url)) return(1);
 225         ++url;
 226
 227         max = sizeof(bogus_prefixes) / sizeof(char *);
 228
 229         for (i=0; i<max; ++i) {
 230                 if (!strncasecmp(url, bogus_prefixes[i], strlen(bogus_prefixes[i]))) {
 231                         return(2);
 232                 }
 233         }
 234
 235         return(0);      /* probably ok */
 236 }
 237
 238
 239 const char *nix(void *vptr) {return ChrPtr( (StrBuf*)vptr);}
 240
 241 /*
 242  * handle one request
 243  *
 244  * This loop gets called once for every HTTP connection made to WebCit.  At
 245  * this entry point we have an HTTP socket with a browser allegedly on the
 246  * other end, but we have not yet bound to a WebCit session.
 247  *
 248  * The job of this function is to locate the correct session and bind to it,
 249  * or create a session if necessary and bind to it, then run the WebCit
 250  * transaction loop.  Afterwards, we unbind from the session.  When this
 251  * function returns, the worker thread is then free to handle another
 252  * transaction.
 253  */
 254 void context_loop(int *sock)
 255 {
 256         const char *Pos = NULL;
 257         const char *buf;
 258         int desired_session = 0;
 259         int got_cookie = 0;
 260         int gzip_ok = 0;
 261         wcsession *TheSession, *sptr;
 262         char httpauth_string[1024];
 263         char httpauth_user[1024];
 264         char httpauth_pass[1024];
 265         int session_is_new = 0;
 266         int nLine = 0;
 267         int LineLen;
 268         void *vLine;
 269         StrBuf *Buf, *Line, *LastLine, *HeaderName, *ReqLine, *ReqType, *HTTPVersion;
 270         StrBuf *accept_language = NULL;
 271         const char *pch, *pchs, *pche;
 272         HashList *HTTPHeaders;
 273
 274         strcpy(httpauth_string, "");
 275         strcpy(httpauth_user, DEFAULT_HTTPAUTH_USER);
 276         strcpy(httpauth_pass, DEFAULT_HTTPAUTH_PASS);
 277
 278         /*
 279          * Find out what it is that the web browser is asking for
 280          */
 281         HeaderName = NewStrBuf();
 282         Buf = NewStrBuf();
 283         LastLine = NULL;
 284         HTTPHeaders = NewHash(1, NULL);
 285
 286         /*
 287          * Read in the request
 288          */
 289         do {
 290                 nLine ++;
 291                 Line = NewStrBuf();
 292
 293
 294                 if (ClientGetLine(sock, Line, Buf, &Pos) < 0) return;
 295
 296                 LineLen = StrLength(Line);
 297
 298                 if (nLine == 1) {
 299                         ReqLine = Line;
 300                         continue;
 301                 }
 302                 if (LineLen == 0) {
 303                         FreeStrBuf(&Line);
 304                         continue;
 305                 }
 306
 307                 /* Do we need to Unfold? */
 308                 if ((LastLine != NULL) &&
 309                     (isspace(*ChrPtr(Line)))) {
 310                         pch = pchs = ChrPtr(Line);
 311                         pche = pchs + StrLength(Line);
 312                         while (isspace(*pch) && (pch < pche))
 313                                 pch ++;
 314                         StrBufCutLeft(Line, pch - pchs);
 315                         StrBufAppendBuf(LastLine, Line, 0);
 316                         FreeStrBuf(&Line);
 317                         continue;
 318                 }
 319
 320                 StrBufSanitizeAscii(Line, '§');
 321                 StrBufExtract_token(HeaderName, Line, 0, ':');
 322
 323                 pchs = ChrPtr(Line);
 324                 pch = pchs + StrLength(HeaderName) + 1;
 325                 pche = pchs + StrLength(Line);
 326                 while (isspace(*pch) && (pch < pche))
 327                         pch ++;
 328                 StrBufCutLeft(Line, pch - pchs);
 329
 330                 StrBufUpCase(HeaderName);
 331                 Put(HTTPHeaders, SKEY(HeaderName), Line, HFreeStrBuf);
 332                 LastLine = Line;
 333         } while (LineLen > 0);
 334         FreeStrBuf(&HeaderName);
 335
 336 /*      dbg_PrintHash(HTTPHeaders, nix, NULL);  */
 337
 338
 339         /*
 340          * Can we compress?
 341          */
 342         if (GetHash(HTTPHeaders, HKEY("ACCEPT-ENCODING"), &vLine) &&
 343             (vLine != NULL)) {
 344                 buf = ChrPtr((StrBuf*)vLine);
 345                 if (strstr(&buf[16], "gzip")) {
 346                         gzip_ok = 1;
 347                 }
 348         }
 349
 350         /*
 351          * Browser-based sessions use cookies for session authentication
 352          */
 353         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 354             (vLine != NULL)) {
 355                 cookie_to_stuff(vLine, &desired_session,
 356                                 NULL, NULL, NULL);
 357                 got_cookie = 1;
 358         }
 359
 360         /*
 361          * GroupDAV-based sessions use HTTP authentication
 362          */
 363         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 364             (vLine != NULL)) {
 365                 Line = (StrBuf*)vLine;
 366                 if (strncasecmp(ChrPtr(Line), "Basic", 5) == 0) {
 367                         StrBufCutLeft(Line, 6);
 368                         CtdlDecodeBase64(httpauth_string, ChrPtr(Line), StrLength(Line));
 369                         extract_token(httpauth_user, httpauth_string, 0, ':', sizeof httpauth_user);
 370                         extract_token(httpauth_pass, httpauth_string, 1, ':', sizeof httpauth_pass);
 371                 }
 372                 else
 373                         lprintf(1, "Authentication scheme not supported! [%s]\n", ChrPtr(Line));
 374         }
 375
 376         if (GetHash(HTTPHeaders, HKEY("IF-MODIFIED-SINCE"), &vLine) &&
 377             (vLine != NULL)) {
 378                 if_modified_since = httpdate_to_timestamp((StrBuf*)vLine);
 379         }
 380
 381         if (GetHash(HTTPHeaders, HKEY("ACCEPT-LANGUAGE"), &vLine) &&
 382             (vLine != NULL)) {
 383                 accept_language = (StrBuf*) vLine;
 384         }
 385
 386
 387         ReqType = NewStrBuf();
 388         HTTPVersion = NewStrBuf();
 389         StrBufExtract_token(HTTPVersion, ReqLine, 2, ' ');
 390         StrBufExtract_token(ReqType, ReqLine, 0, ' ');
 391         StrBufCutLeft(ReqLine, StrLength(ReqType) + 1);
 392         StrBufCutRight(ReqLine, StrLength(HTTPVersion) + 1);
 393
 394         /*
 395          * If the request is prefixed by "/webcit" then chop that off.  This
 396          * allows a front end web server to forward all /webcit requests to us
 397          * while still using the same web server port for other things.
 398          */
 399         if ( (StrLength(ReqLine) >= 8) && (strstr(ChrPtr(ReqLine), "/webcit/")) ) {
 400                 StrBufCutLeft(ReqLine, 7);
 401         }
 402
 403         /* Begin parsing the request. */
 404 #ifdef TECH_PREVIEW
 405         if ((strncmp(ChrPtr(ReqLine), "/sslg", 5) != 0) &&
 406             (strncmp(ChrPtr(ReqLine), "/static/", 8) != 0) &&
 407             (strncmp(ChrPtr(ReqLine), "/tiny_mce/", 10) != 0) &&
 408             (strncmp(ChrPtr(ReqLine), "/wholist_section", 16) != 0) &&
 409             (strstr(ChrPtr(ReqLine), "wholist_section") == NULL)) {
 410 #endif
 411                 lprintf(5, "HTTP: %s %s %s\n", ChrPtr(ReqType), ChrPtr(ReqLine), ChrPtr(HTTPVersion));
 412 #ifdef TECH_PREVIEW
 413         }
 414 #endif
 415
 416         /** Check for bogus requests */
 417         if ((StrLength(HTTPVersion) == 0) ||
 418             (StrLength(ReqType) == 0) ||
 419             is_bogus(ReqLine)) {
 420                 StrBufPlain(ReqLine, HKEY("/404 HTTP/1.1"));
 421                 StrBufPlain(ReqType, HKEY("GET"));
 422         }
 423         FreeStrBuf(&HTTPVersion);
 424
 425         /**
 426          * While we're at it, gracefully handle requests for the
 427          * robots.txt and favicon.ico files.
 428          */
 429         if (!strncasecmp(ChrPtr(ReqLine), "/robots.txt", 11)) {
 430                 StrBufPlain(ReqLine,
 431                             HKEY("/static/robots.txt"
 432                                  "?force_close_session=yes HTTP/1.1"));
 433                 StrBufPlain(ReqType, HKEY("GET"));
 434         }
 435         else if (!strncasecmp(ChrPtr(ReqLine), "/favicon.ico", 12)) {
 436                 StrBufPlain(ReqLine, HKEY("/static/favicon.ico"));
 437                 StrBufPlain(ReqType, HKEY("GET"));
 438         }
 439
 440         /**
 441          * These are the URL's which may be executed without a
 442          * session cookie already set.  If it's not one of these,
 443          * force the session to close because cookies are
 444          * probably disabled on the client browser.
 445          */
 446         else if ( (StrLength(ReqLine) > 1 )
 447                 && (strncasecmp(ChrPtr(ReqLine), "/listsub", 8))
 448                 && (strncasecmp(ChrPtr(ReqLine), "/freebusy", 9))
 449                 && (strncasecmp(ChrPtr(ReqLine), "/do_logout", 10))
 450                 && (strncasecmp(ChrPtr(ReqLine), "/groupdav", 9))
 451                 && (strncasecmp(ChrPtr(ReqLine), "/static", 7))
 452                 && (strncasecmp(ChrPtr(ReqLine), "/rss", 4))
 453                 && (strncasecmp(ChrPtr(ReqLine), "/404", 4))
 454                 && (got_cookie == 0)) {
 455                 StrBufPlain(ReqLine,
 456                             HKEY("/static/nocookies.html"
 457                                  "?force_close_session=yes"));
 458         }
 459
 460         /**
 461          * See if there's an existing session open with the desired ID or user/pass
 462          */
 463         TheSession = NULL;
 464
 465         if (TheSession == NULL) {
 466                 pthread_mutex_lock(&SessionListMutex);
 467                 for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
 468
 469                         /** If HTTP-AUTH, look for a session with matching credentials */
 470                         if ( (!IsEmptyStr(httpauth_user))
 471                              &&(!strcasecmp(ChrPtr(sptr->httpauth_user), httpauth_user))
 472                              &&(!strcasecmp(ChrPtr(sptr->httpauth_pass), httpauth_pass)) ) {
 473                                 TheSession = sptr;
 474                         }
 475
 476                         /** If cookie-session, look for a session with matching session ID */
 477                         if ( (desired_session != 0) && (sptr->wc_session == desired_session)) {
 478                                 TheSession = sptr;
 479                         }
 480
 481                 }
 482                 pthread_mutex_unlock(&SessionListMutex);
 483         }
 484
 485         /**
 486          * Create a new session if we have to
 487          */
 488         if (TheSession == NULL) {
 489                 lprintf(3, "Creating a new session\n");
 490                 TheSession = (wcsession *)
 491                         malloc(sizeof(wcsession));
 492                 memset(TheSession, 0, sizeof(wcsession));
 493                 TheSession->serv_sock = (-1);
 494                 TheSession->chat_sock = (-1);
 495
 496                 /* If we're recreating a session that expired, it's best to give it the same
 497                  * session number that it had before.  The client browser ought to pick up
 498                  * the new session number and start using it, but in some rare situations it
 499                  * doesn't, and that's a Bad Thing because it causes lots of spurious sessions
 500                  * to get created.
 501                  */
 502                 if (desired_session == 0) {
 503                         TheSession->wc_session = GenerateSessionID();
 504                 }
 505                 else {
 506                         TheSession->wc_session = desired_session;
 507                 }
 508
 509                 if (TheSession->httpauth_user != NULL){
 510                         FlushStrBuf(TheSession->httpauth_user);
 511                         StrBufAppendBufPlain(TheSession->httpauth_user, httpauth_user, -1, 0);
 512                 }
 513                 else TheSession->httpauth_user = NewStrBufPlain(httpauth_user, -1);
 514                 if (TheSession->httpauth_user != NULL){
 515                         FlushStrBuf(TheSession->httpauth_pass);
 516                         StrBufAppendBufPlain(TheSession->httpauth_pass, httpauth_user, -1, 0);
 517                 }
 518                 else TheSession->httpauth_pass = NewStrBufPlain(httpauth_user, -1);
 519
 520                 if (TheSession->MigrateReadLineBuf != NULL)
 521                         FlushStrBuf(TheSession->MigrateReadLineBuf);
 522                 else TheSession->MigrateReadLineBuf = NewStrBuf();
 523                 TheSession->CLineBuf = NewStrBuf();
 524                 TheSession->hash_prefs = NewHash(1,NULL);       /* Get a hash table for the user preferences */
 525                 pthread_mutex_init(&TheSession->SessionMutex, NULL);
 526                 pthread_mutex_lock(&SessionListMutex);
 527                 TheSession->nonce = rand();
 528                 TheSession->next = SessionList;
 529                 TheSession->is_mobile = -1;
 530                 SessionList = TheSession;
 531                 pthread_mutex_unlock(&SessionListMutex);
 532                 session_is_new = 1;
 533         }
 534
 535         /*
 536          * A future improvement might be to check the session integrity
 537          * at this point before continuing.
 538          */
 539
 540         /*
 541          * Bind to the session and perform the transaction
 542          */
 543         pthread_mutex_lock(&TheSession->SessionMutex);          /* bind */
 544         pthread_setspecific(MyConKey, (void *)TheSession);
 545
 546         if (TheSession->ImportantMsg == NULL)
 547                 TheSession->ImportantMsg = NewStrBuf();
 548         TheSession->urlstrings = NewHash(1,NULL);
 549         TheSession->vars = NewHash(1,NULL);
 550         TheSession->http_sock = *sock;
 551         TheSession->lastreq = time(NULL);                       /* log */
 552         TheSession->gzip_ok = gzip_ok;
 553 #ifdef ENABLE_NLS
 554         if (session_is_new) {
 555                 httplang_to_locale(accept_language);
 556         }
 557         go_selected_language();                                 /* set locale */
 558 #endif
 559         session_loop(HTTPHeaders, ReqLine, ReqType, Buf, &Pos);                         /* do transaction */
 560 #ifdef ENABLE_NLS
 561         stop_selected_language();                               /* unset locale */
 562 #endif
 563         DeleteHash(&TheSession->summ);
 564         DeleteHash(&TheSession->urlstrings);
 565         DeleteHash(&TheSession->vars);
 566         FreeStrBuf(&TheSession->WBuf);
 567         FreeStrBuf(&TheSession->HBuf);
 568
 569
 570         pthread_mutex_unlock(&TheSession->SessionMutex);        /* unbind */
 571
 572         /* Free the request buffer */
 573         DeleteHash(&HTTPHeaders);
 574         FreeStrBuf(&ReqLine);
 575         FreeStrBuf(&ReqType);
 576         FreeStrBuf(&Buf);
 577         /*
 578          * Free up any session-local substitution variables which
 579          * were set during this transaction
 580          */
 581
 582
 583 }
 584
 585 void tmplput_nonce(StrBuf *Target, WCTemplputParams *TP)
 586 {
 587         wcsession *WCC = WC;
 588         StrBufAppendPrintf(Target, "%ld",
 589                            (WCC != NULL)? WCC->nonce:0);
 590 }
 591
 592 void tmplput_current_user(StrBuf *Target, WCTemplputParams *TP)
 593 {
 594         StrBufAppendTemplate(Target, TP, WC->wc_fullname, 0);
 595 }
 596
 597 void tmplput_current_room(StrBuf *Target, WCTemplputParams *TP)
 598 {
 599         StrBufAppendTemplate(Target, TP, WC->wc_roomname, 0);
 600 }
 601
 602
 603
 604 void
 605 InitModule_CONTEXT
 606 (void)
 607 {
 608         RegisterNamespace("CURRENT_USER", 0, 1, tmplput_current_user, CTX_NONE);
 609         RegisterNamespace("CURRENT_ROOM", 0, 1, tmplput_current_room, CTX_NONE);
 610         RegisterNamespace("NONCE", 0, 0, tmplput_nonce, 0);
 611 }