citadel/modules/xmpp/serv_xmpp.c

   1 /*
   2  * XMPP (Jabber) service for the Citadel system
   3  * Copyright (c) 2007-2011 by Art Cancro
   4  *
   5  * This program is open source software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include "sysdep.h"
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <stdio.h>
  24 #include <stdarg.h>
  25 #include <fcntl.h>
  26 #include <signal.h>
  27 #include <pwd.h>
  28 #include <errno.h>
  29 #include <sys/types.h>
  30
  31 #if TIME_WITH_SYS_TIME
  32 # include <sys/time.h>
  33 # include <time.h>
  34 #else
  35 # if HAVE_SYS_TIME_H
  36 #  include <sys/time.h>
  37 # else
  38 #  include <time.h>
  39 # endif
  40 #endif
  41
  42 #include <sys/wait.h>
  43 #include <string.h>
  44 #include <limits.h>
  45 #include <ctype.h>
  46 #define SHOW_ME_VAPPEND_PRINTF
  47 #include <libcitadel.h>
  48 #include <expat.h>
  49 #include "citadel.h"
  50 #include "server.h"
  51 #include "citserver.h"
  52 #include "support.h"
  53 #include "config.h"
  54 #include "user_ops.h"
  55 #include "database.h"
  56 #include "msgbase.h"
  57 #include "internet_addressing.h"
  58 #include "md5.h"
  59 #include "ctdl_module.h"
  60 #include "serv_xmpp.h"
  61
  62 /* XML_StopParser is present in expat 2.x */
  63 #if XML_MAJOR_VERSION > 1
  64 #define HAVE_XML_STOPPARSER
  65 #endif
  66
  67 struct xmpp_event *xmpp_queue = NULL;
  68 HashList *XMPP_StartHandlers = NULL;
  69 HashList *XMPP_EndHandlers = NULL;
  70
  71 int XMPPSrvDebugEnable = 0;
  72
  73 void XUnbuffer(void)
  74 {
  75         citxmpp *Xmpp = XMPP;
  76
  77         cputbuf(Xmpp->OutBuf);
  78         FlushStrBuf(Xmpp->OutBuf);
  79 }
  80
  81 void XPutBody(const char *Str, long Len)
  82 {
  83         StrBufXMLEscAppend(XMPP->OutBuf, NULL, Str, Len, 0);
  84 }
  85
  86 void XPutProp(const char *Str, long Len)
  87 {
  88         StrEscAppend(XMPP->OutBuf, NULL, Str, 0, 1);
  89 }
  90
  91 void XPut(const char *Str, long Len)
  92 {
  93         StrBufAppendBufPlain(XMPP->OutBuf, Str, Len, 0);
  94 }
  95 #define XPUT(CONSTSTR) XPut(CONSTSTR, sizeof(CONSTSTR) -1)
  96
  97 void XPrintf(const char *Format, ...)
  98 {
  99         va_list arg_ptr;
 100         va_start(arg_ptr, Format);
 101         StrBufVAppendPrintf(XMPP->OutBuf, Format, arg_ptr);
 102         va_end(arg_ptr);
 103 }
 104
 105
 106 #ifdef HAVE_XML_STOPPARSER
 107 /* Stop the parser if an entity declaration is hit. */
 108 static void xmpp_entity_declaration(void *userData, const XML_Char *entityName,
 109                                 int is_parameter_entity, const XML_Char *value,
 110                                 int value_length, const XML_Char *base,
 111                                 const XML_Char *systemId, const XML_Char *publicId,
 112                                 const XML_Char *notationName
 113 ) {
 114         XMPPM_syslog(LOG_WARNING, "Illegal entity declaration encountered; stopping parser.");
 115         XML_StopParser(XMPP->xp, XML_FALSE);
 116 }
 117 #endif
 118
 119 /*
 120  * We have just received a <stream> tag from the client, so send them ours
 121  */
 122 void xmpp_stream_start(void *data, const char *supplied_el, const char **attr)
 123 {
 124         citxmpp *Xmpp = XMPP;
 125
 126         while (*attr) {
 127                 if (!strcasecmp(attr[0], "to")) {
 128                         safestrncpy(Xmpp->server_name, attr[1], sizeof Xmpp->server_name);
 129                 }
 130                 attr += 2;
 131         }
 132
 133         XPUT("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
 134
 135         XPUT("<stream:stream ");
 136         XPUT("from=\"");
 137         XPutProp(Xmpp->server_name, strlen(Xmpp->server_name));
 138         XPUT("\" id=\"");
 139         XPrintf("%08x\" ", CC->cs_pid);
 140         XPUT("version=\"1.0\" "
 141                   "xmlns:stream=\"http://etherx.jabber.org/streams\" "
 142                   "xmlns=\"jabber:client\">"
 143         /* The features of this stream are... */
 144              "<stream:features>");
 145
 146         /*
 147          * TLS encryption (but only if it isn't already active)
 148          */
 149 #ifdef HAVE_OPENSSL
 150         if (!CC->redirect_ssl) {
 151                 XPUT("<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'></starttls>");
 152         }
 153 #endif
 154
 155         if (!CC->logged_in) {
 156                 /* If we're not logged in yet, offer SASL as our feature set */
 157                 xmpp_output_auth_mechs();
 158
 159                 /* Also offer non-SASL authentication */
 160                 XPUT("<auth xmlns=\"http://jabber.org/features/iq-auth\"/>");
 161         }
 162
 163         /* Offer binding and sessions as part of our feature set */
 164         XPUT("<bind xmlns=\"urn:ietf:params:xml:ns:xmpp-bind\"/>"
 165                   "<session xmlns=\"urn:ietf:params:xml:ns:xmpp-session\"/>"
 166                   "</stream:features>");
 167
 168         CC->is_async = 1;               /* XMPP sessions are inherently async-capable */
 169 }
 170
 171 void xmpp_start_query(void *data, const char *supplied_el, const char **attr)
 172 {
 173         XMPP->iq_query_xmlns[0] = 0;
 174         safestrncpy(XMPP->iq_query_xmlns, supplied_el, sizeof XMPP->iq_query_xmlns);
 175 }
 176
 177 void xmpp_start_bind(void *data, const char *supplied_el, const char **attr)
 178 {
 179         XMPP->bind_requested = 1;
 180 }
 181
 182 void xmpp_start_iq(void *data, const char *supplied_el, const char **attr)
 183 {
 184         int i;
 185         for (i=0; attr[i] != NULL; i+=2) {
 186                 if (!strcasecmp(attr[i], "type")) {
 187                         safestrncpy(XMPP->iq_type, attr[i+1], sizeof XMPP->iq_type);
 188                 }
 189                 else if (!strcasecmp(attr[i], "id")) {
 190                         safestrncpy(XMPP->iq_id, attr[i+1], sizeof XMPP->iq_id);
 191                 }
 192                 else if (!strcasecmp(attr[i], "from")) {
 193                         safestrncpy(XMPP->iq_from, attr[i+1], sizeof XMPP->iq_from);
 194                 }
 195                 else if (!strcasecmp(attr[i], "to")) {
 196                         safestrncpy(XMPP->iq_to, attr[i+1], sizeof XMPP->iq_to);
 197                 }
 198         }
 199 }
 200
 201 void xmpp_start_auth(void *data, const char *supplied_el, const char **attr)
 202 {
 203         int i;
 204
 205         XMPP->sasl_auth_mech[0] = 0;
 206         for (i=0; attr[i] != NULL; i+=2) {
 207                 if (!strcasecmp(attr[i], "mechanism")) {
 208                         safestrncpy(XMPP->sasl_auth_mech, attr[i+1], sizeof XMPP->sasl_auth_mech);
 209                 }
 210         }
 211 }
 212
 213 void xmpp_start_message(void *data, const char *supplied_el, const char **attr)
 214 {
 215         int i;
 216
 217         for (i=0; attr[i] != NULL; i+=2) {
 218                 if (!strcasecmp(attr[i], "to")) {
 219                         safestrncpy(XMPP->message_to, attr[i+1], sizeof XMPP->message_to);
 220                 }
 221         }
 222 }
 223
 224 void xmpp_start_html(void *data, const char *supplied_el, const char **attr)
 225 {
 226         ++XMPP->html_tag_level;
 227 }
 228
 229 void xmpp_xml_start(void *data, const char *supplied_el, const char **attr)
 230 {
 231         char el[256];
 232         long newlen;
 233         long len;
 234         char *sep = NULL;
 235         void *pv;
 236
 237         /* Axe the namespace, we don't care about it */
 238         newlen = len = safestrncpy(el, supplied_el, sizeof el);
 239         while (sep = strchr(el, ':'), sep)
 240         {
 241                 newlen -= ++sep - el;
 242                 memmove(el, sep, newlen + 1);
 243                 len = newlen;
 244         }
 245
 246         /*
 247         XMPP_syslog(LOG_DEBUG, "XMPP ELEMENT START: <%s>\n", el);
 248         for (i=0; attr[i] != NULL; i+=2) {
 249                 XMPP_syslog(LOG_DEBUG, "                    Attribute '%s' = '%s'\n", attr[i], attr[i+1]);
 250         }
 251         uncomment for more verbosity */
 252
 253         if (GetHash(XMPP_StartHandlers, el, len, &pv))
 254         {
 255                 xmpp_handler *h;
 256                 h = (xmpp_handler*) pv;
 257                 h->Handler(data, supplied_el, attr);
 258         }
 259 }
 260
 261 void xmpp_end_resource(void *data, const char *supplied_el, const char **attr)
 262 {
 263         if (XMPP->chardata_len > 0) {
 264                 safestrncpy(XMPP->iq_client_resource, XMPP->chardata,
 265                             sizeof XMPP->iq_client_resource);
 266                 striplt(XMPP->iq_client_resource);
 267         }
 268 }
 269
 270 void xmpp_end_username(void *data, const char *supplied_el, const char **attr)
 271 {
 272         /* NON SASL ONLY */
 273         if (XMPP->chardata_len > 0) {
 274                 safestrncpy(XMPP->iq_client_username, XMPP->chardata,
 275                             sizeof XMPP->iq_client_username);
 276                 striplt(XMPP->iq_client_username);
 277         }
 278 }
 279
 280 void xmpp_end_password(void *data, const char *supplied_el, const char **attr)
 281 {               /* NON SASL ONLY */
 282         if (XMPP->chardata_len > 0) {
 283                 safestrncpy(XMPP->iq_client_password, XMPP->chardata,
 284                             sizeof XMPP->iq_client_password);
 285                 striplt(XMPP->iq_client_password);
 286         }
 287 }
 288
 289 void xmpp_end_iq(void *data, const char *supplied_el, const char **attr)
 290 {
 291         citxmpp *Xmpp = XMPP;
 292
 293         /*
 294          * iq type="get" (handle queries)
 295          */
 296         if (!strcasecmp(Xmpp->iq_type, "get"))
 297         {
 298                 /*
 299                  * Query on a namespace
 300                  */
 301                 if (!IsEmptyStr(Xmpp->iq_query_xmlns)) {
 302                         xmpp_query_namespace(Xmpp->iq_id, Xmpp->iq_from,
 303                                              Xmpp->iq_to, Xmpp->iq_query_xmlns);
 304                 }
 305
 306                 /*
 307                  * ping ( http://xmpp.org/extensions/xep-0199.html )
 308                  */
 309                 else if (Xmpp->ping_requested) {
 310                         XPUT("<iq type=\"result\" ");
 311                         if (!IsEmptyStr(Xmpp->iq_from)) {
 312                                 XPUT("to=\"");
 313                                 XPutProp(Xmpp->iq_from, strlen(Xmpp->iq_from));
 314                                 XPUT("\" ");
 315                         }
 316                         if (!IsEmptyStr(Xmpp->iq_to)) {
 317                                 XPUT("from=\"");
 318                                 XPutProp(Xmpp->iq_to, strlen(Xmpp->iq_to));
 319                                 XPUT("\" ");
 320                         }
 321                         XPUT("id=\"");
 322                         XPutProp(Xmpp->iq_id, strlen(Xmpp->iq_id));
 323                         XPUT("\"/>");
 324                 }
 325
 326                 /*
 327                  * Unknown query ... return the XML equivalent of a blank stare
 328                  */
 329                 else {
 330 /*
 331                         Xmpp_syslog(LOG_DEBUG,
 332                                     "Unknown query <%s> - returning <service-unavailable/>\n",
 333                                     el
 334                                 );
 335 */
 336                         XPUT("<iq type=\"error\" id=\"");
 337                         XPutProp(Xmpp->iq_id, strlen(Xmpp->iq_id));
 338                         XPUT("\">"
 339                              "<error code=\"503\" type=\"cancel\">"
 340                              "<service-unavailable xmlns=\"urn:ietf:params:xml:ns:xmpp-stanzas\"/>"
 341                              "</error>"
 342                              "</iq>");
 343                 }
 344         }
 345
 346         /*
 347          * Non SASL authentication
 348          */
 349         else if (
 350                 (!strcasecmp(Xmpp->iq_type, "set"))
 351                 && (!strcasecmp(Xmpp->iq_query_xmlns, "jabber:iq:auth:query"))
 352                 ) {
 353
 354                 xmpp_non_sasl_authenticate(
 355                         Xmpp->iq_id,
 356                         Xmpp->iq_client_username,
 357                         Xmpp->iq_client_password,
 358                         Xmpp->iq_client_resource
 359                         );
 360         }
 361
 362         /*
 363          * If this <iq> stanza was a "bind" attempt, process it ...
 364          */
 365         else if (
 366                 (Xmpp->bind_requested)
 367                 && (!IsEmptyStr(Xmpp->iq_id))
 368                 && (!IsEmptyStr(Xmpp->iq_client_resource))
 369                 && (CC->logged_in)
 370                 ) {
 371
 372                 /* Generate the "full JID" of the client resource */
 373
 374                 snprintf(Xmpp->client_jid, sizeof Xmpp->client_jid,
 375                          "%s/%s",
 376                          CC->cs_inet_email,
 377                          Xmpp->iq_client_resource
 378                         );
 379
 380                 /* Tell the client what its JID is */
 381
 382                 XPUT("<iq type=\"result\" id=\"");
 383                 XPutProp(Xmpp->iq_id, strlen(Xmpp->iq_id));
 384                 XPUT("\">"
 385                      "<bind xmlns=\"urn:ietf:params:xml:ns:xmpp-bind\">");
 386                 XPUT("<jid>");
 387                 XPutBody(Xmpp->client_jid, strlen(Xmpp->client_jid));
 388                 XPUT("</jid>"
 389                      "</bind>"
 390                      "</iq>");
 391         }
 392
 393         else if (Xmpp->iq_session) {
 394                 XPUT("<iq type=\"result\" id=\"");
 395                 XPutProp(Xmpp->iq_id, strlen(Xmpp->iq_id));
 396                 XPUT("\">"
 397                      "</iq>");
 398         }
 399
 400         else {
 401                 XPUT("<iq type=\"error\" id=\"");
 402                 XPutProp(Xmpp->iq_id, strlen(Xmpp->iq_id));
 403                 XPUT("\">");
 404                 XPUT("<error>Don't know howto do '");
 405                 XPutBody(Xmpp->iq_type, strlen(Xmpp->iq_type));
 406                 XPUT("'!</error>"
 407                      "</iq>");
 408         }
 409
 410         /* Now clear these fields out so they don't get used by a future stanza */
 411         Xmpp->iq_id[0] = 0;
 412         Xmpp->iq_from[0] = 0;
 413         Xmpp->iq_to[0] = 0;
 414         Xmpp->iq_type[0] = 0;
 415         Xmpp->iq_client_resource[0] = 0;
 416         Xmpp->iq_session = 0;
 417         Xmpp->iq_query_xmlns[0] = 0;
 418         Xmpp->bind_requested = 0;
 419         Xmpp->ping_requested = 0;
 420 }
 421
 422
 423 void xmpp_end_auth(void *data, const char *supplied_el, const char **attr)
 424 {
 425         /* Try to authenticate (this function is responsible for the output stanza) */
 426         xmpp_sasl_auth(XMPP->sasl_auth_mech, (XMPP->chardata != NULL ? XMPP->chardata : "") );
 427
 428         /* Now clear these fields out so they don't get used by a future stanza */
 429         XMPP->sasl_auth_mech[0] = 0;
 430 }
 431
 432 void xmpp_end_session(void *data, const char *supplied_el, const char **attr)
 433 {
 434         XMPP->iq_session = 1;
 435 }
 436
 437 void xmpp_end_body(void *data, const char *supplied_el, const char **attr)
 438 {
 439         if (XMPP->html_tag_level == 0)
 440         {
 441                 if (XMPP->message_body != NULL)
 442                 {
 443                         free(XMPP->message_body);
 444                         XMPP->message_body = NULL;
 445                 }
 446                 if (XMPP->chardata_len > 0) {
 447                         XMPP->message_body = strdup(XMPP->chardata);
 448                 }
 449         }
 450 }
 451
 452 void xmpp_end_html(void *data, const char *supplied_el, const char **attr)
 453 {
 454         --XMPP->html_tag_level;
 455 }
 456
 457 void xmpp_end_starttls(void *data, const char *supplied_el, const char **attr)
 458 {
 459 #ifdef HAVE_OPENSSL
 460         XPUT("<proceed xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
 461         XUnbuffer();
 462         CtdlModuleStartCryptoMsgs(NULL, NULL, NULL);
 463         if (!CC->redirect_ssl) CC->kill_me = KILLME_NO_CRYPTO;
 464 #else
 465         XPUT("<failure xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
 466         CC->kill_me = KILLME_NO_CRYPTO;
 467 #endif
 468 }
 469
 470 void xmpp_end_ping(void *data, const char *supplied_el, const char **attr)
 471 {
 472         XMPP->ping_requested = 1;
 473 }
 474
 475 void xmpp_end_stream(void *data, const char *supplied_el, const char **attr)
 476 {
 477         XMPPM_syslog(LOG_DEBUG, "XMPP client shut down their stream\n");
 478         xmpp_massacre_roster();
 479         XPUT("</stream>\n");
 480         CC->kill_me = KILLME_CLIENT_LOGGED_OUT;
 481 }
 482
 483 void xmpp_xml_end(void *data, const char *supplied_el)
 484 {
 485         char el[256];
 486         long len;
 487         long newlen;
 488         char *sep = NULL;
 489         void *pv;
 490
 491         /* Axe the namespace, we don't care about it */
 492         newlen = len = safestrncpy(el, supplied_el, sizeof el);
 493         while (sep = strchr(el, ':'), sep) {
 494
 495                 newlen -= ++sep - el;
 496                 memmove(el, sep, newlen + 1);
 497                 len = newlen;
 498         }
 499
 500         /*
 501         XMPP_syslog(LOG_DEBUG, "XMPP ELEMENT END  : <%s>\n", el);
 502         if (XMPP->chardata_len > 0) {
 503                 XMPP_syslog(LOG_DEBUG, "          chardata: %s\n", XMPP->chardata);
 504         }
 505         uncomment for more verbosity */
 506
 507         if (GetHash(XMPP_EndHandlers, el, len, &pv))
 508         {
 509                 xmpp_handler *h;
 510                 h = (xmpp_handler*) pv;
 511                 h->Handler(data, supplied_el, NULL);
 512         }
 513         else
 514         {
 515                 XMPP_syslog(LOG_DEBUG, "Ignoring unknown tag <%s>\n", el);
 516         }
 517
 518         XMPP->chardata_len = 0;
 519         if (XMPP->chardata_alloc > 0) {
 520                 XMPP->chardata[0] = 0;
 521         }
 522 }
 523
 524
 525 void xmpp_xml_chardata(void *data, const XML_Char *s, int len)
 526 {
 527         citxmpp *X = XMPP;
 528
 529         if (X->chardata_alloc == 0) {
 530                 X->chardata_alloc = SIZ;
 531                 X->chardata = malloc(X->chardata_alloc);
 532         }
 533         if ((X->chardata_len + len + 1) > X->chardata_alloc) {
 534                 X->chardata_alloc = X->chardata_len + len + 1024;
 535                 X->chardata = realloc(X->chardata, X->chardata_alloc);
 536         }
 537         memcpy(&X->chardata[X->chardata_len], s, len);
 538         X->chardata_len += len;
 539         X->chardata[X->chardata_len] = 0;
 540 }
 541
 542
 543 /*
 544  * This cleanup function blows away the temporary memory and files used by the XMPP service.
 545  */
 546 void xmpp_cleanup_function(void) {
 547
 548         /* Don't do this stuff if this is not a XMPP session! */
 549         if (CC->h_command_function != xmpp_command_loop) return;
 550
 551         if (XMPP->chardata != NULL) {
 552                 free(XMPP->chardata);
 553                 XMPP->chardata = NULL;
 554                 XMPP->chardata_len = 0;
 555                 XMPP->chardata_alloc = 0;
 556                 if (XMPP->message_body != NULL) {
 557                         free(XMPP->message_body);
 558                 }
 559         }
 560         XML_ParserFree(XMPP->xp);
 561         FreeStrBuf(&XMPP->OutBuf);
 562         free(XMPP);
 563 }
 564
 565
 566
 567 /*
 568  * Here's where our XMPP session begins its happy day.
 569  */
 570 void xmpp_greeting(void) {
 571         client_set_inbound_buf(4);
 572         strcpy(CC->cs_clientname, "XMPP session");
 573         CC->session_specific_data = malloc(sizeof(citxmpp));
 574         memset(XMPP, 0, sizeof(citxmpp));
 575         XMPP->last_event_processed = queue_event_seq;
 576         XMPP->OutBuf = NewStrBufPlain(NULL, SIZ);
 577         /* XMPP does not use a greeting, but we still have to initialize some things. */
 578
 579         XMPP->xp = XML_ParserCreateNS("UTF-8", ':');
 580         if (XMPP->xp == NULL) {
 581                 XMPPM_syslog(LOG_ALERT, "Cannot create XML parser!\n");
 582                 CC->kill_me = KILLME_XML_PARSER;
 583                 return;
 584         }
 585
 586         XML_SetElementHandler(XMPP->xp, xmpp_xml_start, xmpp_xml_end);
 587         XML_SetCharacterDataHandler(XMPP->xp, xmpp_xml_chardata);
 588         // XML_SetUserData(XMPP->xp, something...);
 589
 590         /* Prevent the "billion laughs" attack against expat by disabling
 591          * internal entity expansion.  With 2.x, forcibly stop the parser
 592          * if an entity is declared - this is safer and a more obvious
 593          * failure mode.  With older versions, simply prevent expansion
 594          * of such entities. */
 595 #ifdef HAVE_XML_STOPPARSER
 596         XML_SetEntityDeclHandler(XMPP->xp, xmpp_entity_declaration);
 597 #else
 598         XML_SetDefaultHandler(XMPP->xp, NULL);
 599 #endif
 600
 601         CC->can_receive_im = 1;         /* This protocol is capable of receiving instant messages */
 602         XUnbuffer();
 603 }
 604
 605
 606 /*
 607  * Main command loop for XMPP sessions.
 608  */
 609 void xmpp_command_loop(void) {
 610         int rc;
 611         StrBuf *stream_input = NewStrBuf();
 612
 613         time(&CC->lastcmd);
 614         rc = client_read_random_blob(stream_input, 30);
 615         if (rc > 0) {
 616                 XML_Parse(XMPP->xp, ChrPtr(stream_input), rc, 0);
 617         }
 618         else {
 619                 XMPPM_syslog(LOG_ERR, "client disconnected: ending session.\n");
 620                 CC->kill_me = KILLME_CLIENT_DISCONNECTED;
 621         }
 622         FreeStrBuf(&stream_input);
 623         XUnbuffer();
 624 }
 625
 626
 627 /*
 628  * Async loop for XMPP sessions (handles the transmission of unsolicited stanzas)
 629  */
 630 void xmpp_async_loop(void) {
 631         xmpp_process_events();
 632         xmpp_output_incoming_messages();
 633 }
 634
 635
 636 /*
 637  * Login hook for XMPP sessions
 638  */
 639 void xmpp_login_hook(void) {
 640         xmpp_queue_event(XMPP_EVT_LOGIN, CC->cs_inet_email);
 641 }
 642
 643
 644 /*
 645  * Logout hook for XMPP sessions
 646  */
 647 void xmpp_logout_hook(void) {
 648         xmpp_queue_event(XMPP_EVT_LOGOUT, CC->cs_inet_email);
 649 }
 650
 651
 652 void LogXMPPSrvDebugEnable(const int n)
 653 {
 654         XMPPSrvDebugEnable = n;
 655 }
 656 const char *CitadelServiceXMPP="XMPP";
 657 extern void xmpp_cleanup_events(void);
 658
 659
 660
 661 /******************************************************************************
 662  *                    XMPP handler registering logic                           *
 663  ******************************************************************************/
 664
 665 void AddXMPPStartHandler(const char *key,
 666                          long len,
 667                          xmpp_handler_func Handler,
 668                          int Flags)
 669 {
 670         xmpp_handler *h;
 671         h = (xmpp_handler*) malloc(sizeof (xmpp_handler));
 672         h->Flags = Flags;
 673         h->Handler = Handler;
 674         Put(XMPP_StartHandlers, key, len, h, NULL);
 675 }
 676
 677 void AddXMPPEndHandler(const char *key,
 678                        long len,
 679                        xmpp_handler_func Handler,
 680                        int Flags)
 681 {
 682         xmpp_handler *h;
 683         h = (xmpp_handler*) malloc(sizeof (xmpp_handler));
 684         h->Flags = Flags;
 685         h->Handler = Handler;
 686         Put(XMPP_EndHandlers, key, len, h, NULL);
 687 }
 688
 689 CTDL_MODULE_INIT(xmpp)
 690 {
 691         if (!threading) {
 692                 CtdlRegisterServiceHook(config.c_xmpp_c2s_port,
 693                                         NULL,
 694                                         xmpp_greeting,
 695                                         xmpp_command_loop,
 696                                         xmpp_async_loop,
 697                                         CitadelServiceXMPP);
 698
 699
 700                 XMPP_StartHandlers = NewHash(1, NULL);
 701                 XMPP_EndHandlers = NewHash(1, NULL);
 702
 703                 AddXMPPEndHandler(HKEY("resource"),      xmpp_end_resource, 0);
 704                 AddXMPPEndHandler(HKEY("username"),      xmpp_end_username, 0);
 705                 AddXMPPEndHandler(HKEY("password"),      xmpp_end_password, 0);
 706                 AddXMPPEndHandler(HKEY("iq"),            xmpp_end_iq, 0);
 707                 AddXMPPEndHandler(HKEY("auth"),          xmpp_end_auth, 0);
 708                 AddXMPPEndHandler(HKEY("session"),       xmpp_end_session, 0);
 709                 AddXMPPEndHandler(HKEY("body"),          xmpp_end_body, 0);
 710                 AddXMPPEndHandler(HKEY("html"),          xmpp_end_html, 0);
 711                 AddXMPPEndHandler(HKEY("starttls"),      xmpp_end_starttls, 0);
 712                 AddXMPPEndHandler(HKEY("ping"),          xmpp_end_ping, 0);
 713                 AddXMPPEndHandler(HKEY("stream"),        xmpp_end_stream, 0);
 714
 715                 AddXMPPStartHandler(HKEY("stream"),     xmpp_stream_start, 0);
 716                 AddXMPPStartHandler(HKEY("query"),      xmpp_start_query, 0);
 717                 AddXMPPStartHandler(HKEY("bind"),       xmpp_start_bind, 0);
 718                 AddXMPPStartHandler(HKEY("iq"),         xmpp_start_iq, 0);
 719                 AddXMPPStartHandler(HKEY("auth"),       xmpp_start_auth, 0);
 720                 AddXMPPStartHandler(HKEY("message"),    xmpp_start_message, 0);
 721                 AddXMPPStartHandler(HKEY("html"),       xmpp_start_html, 0);
 722
 723
 724                 CtdlRegisterDebugFlagHook(HKEY("serv_xmpp"), LogXMPPSrvDebugEnable, &XMPPSrvDebugEnable);
 725                 CtdlRegisterSessionHook(xmpp_cleanup_function, EVT_STOP, PRIO_STOP + 70);
 726                 CtdlRegisterSessionHook(xmpp_login_hook, EVT_LOGIN, PRIO_LOGIN + 90);
 727                 CtdlRegisterSessionHook(xmpp_logout_hook, EVT_LOGOUT, PRIO_LOGOUT + 90);
 728                 CtdlRegisterSessionHook(xmpp_login_hook, EVT_UNSTEALTH, PRIO_UNSTEALTH + 1);
 729                 CtdlRegisterSessionHook(xmpp_logout_hook, EVT_STEALTH, PRIO_STEALTH + 1);
 730                 CtdlRegisterCleanupHook(xmpp_cleanup_events);
 731
 732         }
 733
 734         /* return our module name for the log */
 735         return "xmpp";
 736 }