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
 144         /* The features of this stream are... */
 145         XPUT("<stream:features>");
 146
 147         /*
 148          * TLS encryption (but only if it isn't already active)
 149          */
 150 #ifdef HAVE_OPENSSL
 151         if (!CC->redirect_ssl) {
 152                 XPUT("<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'></starttls>");
 153         }
 154 #endif
 155
 156         if (!CC->logged_in) {
 157                 /* If we're not logged in yet, offer SASL as our feature set */
 158                 xmpp_output_auth_mechs();
 159
 160                 /* Also offer non-SASL authentication */
 161                 XPUT("<auth xmlns=\"http://jabber.org/features/iq-auth\"/>");
 162         }
 163
 164         /* Offer binding and sessions as part of our feature set */
 165         XPUT("<bind xmlns=\"urn:ietf:params:xml:ns:xmpp-bind\"/>"
 166                   "<session xmlns=\"urn:ietf:params:xml:ns:xmpp-session\"/>"
 167                   "</stream:features>");
 168
 169         CC->is_async = 1;               /* XMPP sessions are inherently async-capable */
 170 }
 171
 172 void xmpp_start_query(void *data, const char *supplied_el, const char **attr)
 173 {
 174         XMPP->iq_query_xmlns[0] = 0;
 175         safestrncpy(XMPP->iq_query_xmlns, supplied_el, sizeof XMPP->iq_query_xmlns);
 176 }
 177
 178 void xmpp_start_bind(void *data, const char *supplied_el, const char **attr)
 179 {
 180         XMPP->bind_requested = 1;
 181 }
 182
 183 void xmpp_start_iq(void *data, const char *supplied_el, const char **attr)
 184 {
 185         int i;
 186         for (i=0; attr[i] != NULL; i+=2) {
 187                 if (!strcasecmp(attr[i], "type")) {
 188                         safestrncpy(XMPP->iq_type, attr[i+1], sizeof XMPP->iq_type);
 189                 }
 190                 else if (!strcasecmp(attr[i], "id")) {
 191                         safestrncpy(XMPP->iq_id, attr[i+1], sizeof XMPP->iq_id);
 192                 }
 193                 else if (!strcasecmp(attr[i], "from")) {
 194                         safestrncpy(XMPP->iq_from, attr[i+1], sizeof XMPP->iq_from);
 195                 }
 196                 else if (!strcasecmp(attr[i], "to")) {
 197                         safestrncpy(XMPP->iq_to, attr[i+1], sizeof XMPP->iq_to);
 198                 }
 199         }
 200 }
 201
 202 void xmpp_start_auth(void *data, const char *supplied_el, const char **attr)
 203 {
 204         int i;
 205
 206         XMPP->sasl_auth_mech[0] = 0;
 207         for (i=0; attr[i] != NULL; i+=2) {
 208                 if (!strcasecmp(attr[i], "mechanism")) {
 209                         safestrncpy(XMPP->sasl_auth_mech, attr[i+1], sizeof XMPP->sasl_auth_mech);
 210                 }
 211         }
 212 }
 213
 214 void xmpp_start_message(void *data, const char *supplied_el, const char **attr)
 215 {
 216         int i;
 217
 218         for (i=0; attr[i] != NULL; i+=2) {
 219                 if (!strcasecmp(attr[i], "to")) {
 220                         safestrncpy(XMPP->message_to, attr[i+1], sizeof XMPP->message_to);
 221                 }
 222         }
 223 }
 224
 225 void xmpp_start_html(void *data, const char *supplied_el, const char **attr)
 226 {
 227         ++XMPP->html_tag_level;
 228 }
 229
 230 void xmpp_xml_start(void *data, const char *supplied_el, const char **attr)
 231 {
 232         char el[256];
 233         long newlen;
 234         long len;
 235         char *sep = NULL;
 236         void *pv;
 237
 238         /* Axe the namespace, we don't care about it */
 239         newlen = len = safestrncpy(el, supplied_el, sizeof el);
 240         while (sep = strchr(el, ':'), sep)
 241         {
 242                 newlen -= ++sep - el;
 243                 memmove(el, sep, newlen + 1);
 244                 len = newlen;
 245         }
 246
 247         /*
 248         XMPP_syslog(LOG_DEBUG, "XMPP ELEMENT START: <%s>\n", el);
 249         for (i=0; attr[i] != NULL; i+=2) {
 250                 XMPP_syslog(LOG_DEBUG, "                    Attribute '%s' = '%s'\n", attr[i], attr[i+1]);
 251         }
 252         uncomment for more verbosity */
 253
 254         if (GetHash(XMPP_StartHandlers, el, len, &pv))
 255         {
 256                 xmpp_handler *h;
 257                 h = (xmpp_handler*) pv;
 258                 h->Handler(data, supplied_el, attr);
 259         }
 260         XUnbuffer();
 261 }
 262
 263 void xmpp_end_resource(void *data, const char *supplied_el, const char **attr)
 264 {
 265         if (XMPP->chardata_len > 0) {
 266                 safestrncpy(XMPP->iq_client_resource, XMPP->chardata,
 267                             sizeof XMPP->iq_client_resource);
 268                 striplt(XMPP->iq_client_resource);
 269         }
 270 }
 271
 272 void xmpp_end_username(void *data, const char *supplied_el, const char **attr)
 273 {
 274         /* NON SASL ONLY */
 275         if (XMPP->chardata_len > 0) {
 276                 safestrncpy(XMPP->iq_client_username, XMPP->chardata,
 277                             sizeof XMPP->iq_client_username);
 278                 striplt(XMPP->iq_client_username);
 279         }
 280 }
 281
 282 void xmpp_end_password(void *data, const char *supplied_el, const char **attr)
 283 {               /* NON SASL ONLY */
 284         if (XMPP->chardata_len > 0) {
 285                 safestrncpy(XMPP->iq_client_password, XMPP->chardata,
 286                             sizeof XMPP->iq_client_password);
 287                 striplt(XMPP->iq_client_password);
 288         }
 289 }
 290
 291 void xmpp_end_iq(void *data, const char *supplied_el, const char **attr)
 292 {
 293         citxmpp *Xmpp = XMPP;
 294
 295         /*
 296          * iq type="get" (handle queries)
 297          */
 298         if (!strcasecmp(Xmpp->iq_type, "get"))
 299         {
 300                 /*
 301                  * Query on a namespace
 302                  */
 303                 if (!IsEmptyStr(Xmpp->iq_query_xmlns)) {
 304                         xmpp_query_namespace(Xmpp->iq_id, Xmpp->iq_from,
 305                                              Xmpp->iq_to, Xmpp->iq_query_xmlns);
 306                 }
 307
 308                 /*
 309                  * ping ( http://xmpp.org/extensions/xep-0199.html )
 310                  */
 311                 else if (Xmpp->ping_requested) {
 312                         XPUT("<iq type=\"result\" ");
 313                         if (!IsEmptyStr(Xmpp->iq_from)) {
 314                                 XPUT("to=\"");
 315                                 XPutProp(Xmpp->iq_from, strlen(Xmpp->iq_from));
 316                                 XPUT("\" ");
 317                         }
 318                         if (!IsEmptyStr(Xmpp->iq_to)) {
 319                                 XPUT("from=\"");
 320                                 XPutProp(Xmpp->iq_to, strlen(Xmpp->iq_to));
 321                                 XPUT("\" ");
 322                         }
 323                         XPUT("id=\"");
 324                         XPutProp(Xmpp->iq_id, strlen(Xmpp->iq_id));
 325                         XPUT("\"/>");
 326                 }
 327
 328                 /*
 329                  * Unknown query ... return the XML equivalent of a blank stare
 330                  */
 331                 else {
 332 /*
 333                         Xmpp_syslog(LOG_DEBUG,
 334                                     "Unknown query <%s> - returning <service-unavailable/>\n",
 335                                     el
 336                                 );
 337 */
 338                         XPUT("<iq type=\"error\" id=\"");
 339                         XPutProp(Xmpp->iq_id, strlen(Xmpp->iq_id));
 340                         XPUT("\">"
 341                              "<error code=\"503\" type=\"cancel\">"
 342                              "<service-unavailable xmlns=\"urn:ietf:params:xml:ns:xmpp-stanzas\"/>"
 343                              "</error>"
 344                              "</iq>");
 345                 }
 346         }
 347
 348         /*
 349          * Non SASL authentication
 350          */
 351         else if (
 352                 (!strcasecmp(Xmpp->iq_type, "set"))
 353                 && (!strcasecmp(Xmpp->iq_query_xmlns, "jabber:iq:auth:query"))
 354                 ) {
 355
 356                 xmpp_non_sasl_authenticate(
 357                         Xmpp->iq_id,
 358                         Xmpp->iq_client_username,
 359                         Xmpp->iq_client_password,
 360                         Xmpp->iq_client_resource
 361                         );
 362         }
 363
 364         /*
 365          * If this <iq> stanza was a "bind" attempt, process it ...
 366          */
 367         else if (
 368                 (Xmpp->bind_requested)
 369                 && (!IsEmptyStr(Xmpp->iq_id))
 370                 && (!IsEmptyStr(Xmpp->iq_client_resource))
 371                 && (CC->logged_in)
 372                 ) {
 373
 374                 /* Generate the "full JID" of the client resource */
 375
 376                 snprintf(Xmpp->client_jid, sizeof Xmpp->client_jid,
 377                          "%s/%s",
 378                          CC->cs_inet_email,
 379                          Xmpp->iq_client_resource
 380                         );
 381
 382                 /* Tell the client what its JID is */
 383
 384                 XPUT("<iq type=\"result\" id=\"");
 385                 XPutProp(Xmpp->iq_id, strlen(Xmpp->iq_id));
 386                 XPUT("\">"
 387                      "<bind xmlns=\"urn:ietf:params:xml:ns:xmpp-bind\">");
 388                 XPUT("<jid>");
 389                 XPutBody(Xmpp->client_jid, strlen(Xmpp->client_jid));
 390                 XPUT("</jid>"
 391                      "</bind>"
 392                      "</iq>");
 393         }
 394
 395         else if (Xmpp->iq_session) {
 396                 XPUT("<iq type=\"result\" id=\"");
 397                 XPutProp(Xmpp->iq_id, strlen(Xmpp->iq_id));
 398                 XPUT("\">"
 399                      "</iq>");
 400         }
 401
 402         else {
 403                 XPUT("<iq type=\"error\" id=\"");
 404                 XPutProp(Xmpp->iq_id, strlen(Xmpp->iq_id));
 405                 XPUT("\">");
 406                 XPUT("<error>Don't know howto do '");
 407                 XPutBody(Xmpp->iq_type, strlen(Xmpp->iq_type));
 408                 XPUT("'!</error>"
 409                      "</iq>");
 410         }
 411
 412         /* Now clear these fields out so they don't get used by a future stanza */
 413         Xmpp->iq_id[0] = 0;
 414         Xmpp->iq_from[0] = 0;
 415         Xmpp->iq_to[0] = 0;
 416         Xmpp->iq_type[0] = 0;
 417         Xmpp->iq_client_resource[0] = 0;
 418         Xmpp->iq_session = 0;
 419         Xmpp->iq_query_xmlns[0] = 0;
 420         Xmpp->bind_requested = 0;
 421         Xmpp->ping_requested = 0;
 422 }
 423
 424
 425 void xmpp_end_auth(void *data, const char *supplied_el, const char **attr)
 426 {
 427         /* Try to authenticate (this function is responsible for the output stanza) */
 428         xmpp_sasl_auth(XMPP->sasl_auth_mech, (XMPP->chardata != NULL ? XMPP->chardata : "") );
 429
 430         /* Now clear these fields out so they don't get used by a future stanza */
 431         XMPP->sasl_auth_mech[0] = 0;
 432 }
 433
 434 void xmpp_end_session(void *data, const char *supplied_el, const char **attr)
 435 {
 436         XMPP->iq_session = 1;
 437 }
 438
 439 void xmpp_end_body(void *data, const char *supplied_el, const char **attr)
 440 {
 441         if (XMPP->html_tag_level == 0)
 442         {
 443                 if (XMPP->message_body != NULL)
 444                 {
 445                         free(XMPP->message_body);
 446                         XMPP->message_body = NULL;
 447                 }
 448                 if (XMPP->chardata_len > 0) {
 449                         XMPP->message_body = strdup(XMPP->chardata);
 450                 }
 451         }
 452 }
 453
 454 void xmpp_end_html(void *data, const char *supplied_el, const char **attr)
 455 {
 456         --XMPP->html_tag_level;
 457 }
 458
 459 void xmpp_end_starttls(void *data, const char *supplied_el, const char **attr)
 460 {
 461 #ifdef HAVE_OPENSSL
 462         XPUT("<proceed xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
 463         CtdlModuleStartCryptoMsgs(NULL, NULL, NULL);
 464         if (!CC->redirect_ssl) CC->kill_me = KILLME_NO_CRYPTO;
 465 #else
 466         XPUT("<failure xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
 467         CC->kill_me = KILLME_NO_CRYPTO;
 468 #endif
 469 }
 470
 471 void xmpp_end_ping(void *data, const char *supplied_el, const char **attr)
 472 {
 473         XMPP->ping_requested = 1;
 474 }
 475
 476 void xmpp_end_stream(void *data, const char *supplied_el, const char **attr)
 477 {
 478         XMPPM_syslog(LOG_DEBUG, "XMPP client shut down their stream\n");
 479         xmpp_massacre_roster();
 480         XPUT("</stream>\n");
 481         CC->kill_me = KILLME_CLIENT_LOGGED_OUT;
 482 }
 483
 484 void xmpp_xml_end(void *data, const char *supplied_el)
 485 {
 486         char el[256];
 487         long len;
 488         long newlen;
 489         char *sep = NULL;
 490         void *pv;
 491
 492         /* Axe the namespace, we don't care about it */
 493         newlen = len = safestrncpy(el, supplied_el, sizeof el);
 494         while (sep = strchr(el, ':'), sep) {
 495
 496                 newlen -= ++sep - el;
 497                 memmove(el, sep, newlen + 1);
 498                 len = newlen;
 499         }
 500
 501         /*
 502         XMPP_syslog(LOG_DEBUG, "XMPP ELEMENT END  : <%s>\n", el);
 503         if (XMPP->chardata_len > 0) {
 504                 XMPP_syslog(LOG_DEBUG, "          chardata: %s\n", XMPP->chardata);
 505         }
 506         uncomment for more verbosity */
 507
 508         if (GetHash(XMPP_EndHandlers, el, len, &pv))
 509         {
 510                 xmpp_handler *h;
 511                 h = (xmpp_handler*) pv;
 512                 h->Handler(data, supplied_el, NULL);
 513         }
 514         else
 515         {
 516                 XMPP_syslog(LOG_DEBUG, "Ignoring unknown tag <%s>\n", el);
 517         }
 518
 519         XMPP->chardata_len = 0;
 520         if (XMPP->chardata_alloc > 0) {
 521                 XMPP->chardata[0] = 0;
 522         }
 523         XUnbuffer();
 524 }
 525
 526
 527 void xmpp_xml_chardata(void *data, const XML_Char *s, int len)
 528 {
 529         citxmpp *X = XMPP;
 530
 531         if (X->chardata_alloc == 0) {
 532                 X->chardata_alloc = SIZ;
 533                 X->chardata = malloc(X->chardata_alloc);
 534         }
 535         if ((X->chardata_len + len + 1) > X->chardata_alloc) {
 536                 X->chardata_alloc = X->chardata_len + len + 1024;
 537                 X->chardata = realloc(X->chardata, X->chardata_alloc);
 538         }
 539         memcpy(&X->chardata[X->chardata_len], s, len);
 540         X->chardata_len += len;
 541         X->chardata[X->chardata_len] = 0;
 542 }
 543
 544
 545 /*
 546  * This cleanup function blows away the temporary memory and files used by the XMPP service.
 547  */
 548 void xmpp_cleanup_function(void) {
 549
 550         /* Don't do this stuff if this is not a XMPP session! */
 551         if (CC->h_command_function != xmpp_command_loop) return;
 552
 553         if (XMPP->chardata != NULL) {
 554                 free(XMPP->chardata);
 555                 XMPP->chardata = NULL;
 556                 XMPP->chardata_len = 0;
 557                 XMPP->chardata_alloc = 0;
 558                 if (XMPP->message_body != NULL) {
 559                         free(XMPP->message_body);
 560                 }
 561         }
 562         XML_ParserFree(XMPP->xp);
 563         free(XMPP);
 564 }
 565
 566
 567
 568 /*
 569  * Here's where our XMPP session begins its happy day.
 570  */
 571 void xmpp_greeting(void) {
 572         client_set_inbound_buf(4);
 573         strcpy(CC->cs_clientname, "XMPP session");
 574         CC->session_specific_data = malloc(sizeof(citxmpp));
 575         memset(XMPP, 0, sizeof(citxmpp));
 576         XMPP->last_event_processed = queue_event_seq;
 577
 578         /* XMPP does not use a greeting, but we still have to initialize some things. */
 579
 580         XMPP->xp = XML_ParserCreateNS("UTF-8", ':');
 581         if (XMPP->xp == NULL) {
 582                 XMPPM_syslog(LOG_ALERT, "Cannot create XML parser!\n");
 583                 CC->kill_me = KILLME_XML_PARSER;
 584                 return;
 585         }
 586
 587         XML_SetElementHandler(XMPP->xp, xmpp_xml_start, xmpp_xml_end);
 588         XML_SetCharacterDataHandler(XMPP->xp, xmpp_xml_chardata);
 589         // XML_SetUserData(XMPP->xp, something...);
 590
 591         /* Prevent the "billion laughs" attack against expat by disabling
 592          * internal entity expansion.  With 2.x, forcibly stop the parser
 593          * if an entity is declared - this is safer and a more obvious
 594          * failure mode.  With older versions, simply prevent expansion
 595          * of such entities. */
 596 #ifdef HAVE_XML_STOPPARSER
 597         XML_SetEntityDeclHandler(XMPP->xp, xmpp_entity_declaration);
 598 #else
 599         XML_SetDefaultHandler(XMPP->xp, NULL);
 600 #endif
 601
 602         CC->can_receive_im = 1;         /* This protocol is capable of receiving instant messages */
 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 }
 624
 625
 626 /*
 627  * Async loop for XMPP sessions (handles the transmission of unsolicited stanzas)
 628  */
 629 void xmpp_async_loop(void) {
 630         xmpp_process_events();
 631         xmpp_output_incoming_messages();
 632 }
 633
 634
 635 /*
 636  * Login hook for XMPP sessions
 637  */
 638 void xmpp_login_hook(void) {
 639         xmpp_queue_event(XMPP_EVT_LOGIN, CC->cs_inet_email);
 640 }
 641
 642
 643 /*
 644  * Logout hook for XMPP sessions
 645  */
 646 void xmpp_logout_hook(void) {
 647         xmpp_queue_event(XMPP_EVT_LOGOUT, CC->cs_inet_email);
 648 }
 649
 650
 651 void LogXMPPSrvDebugEnable(const int n)
 652 {
 653         XMPPSrvDebugEnable = n;
 654 }
 655 const char *CitadelServiceXMPP="XMPP";
 656 extern void xmpp_cleanup_events(void);
 657
 658
 659
 660 /******************************************************************************
 661  *                    XMPP handler registering logic                           *
 662  ******************************************************************************/
 663
 664 void AddXMPPStartHandler(const char *key,
 665                          long len,
 666                          xmpp_handler_func Handler,
 667                          int Flags)
 668 {
 669         xmpp_handler *h;
 670         h = (xmpp_handler*) malloc(sizeof (xmpp_handler));
 671         h->Flags = Flags;
 672         h->Handler = Handler;
 673         Put(XMPP_StartHandlers, key, len, h, NULL);
 674 }
 675
 676 void AddXMPPEndHandler(const char *key,
 677                        long len,
 678                        xmpp_handler_func Handler,
 679                        int Flags)
 680 {
 681         xmpp_handler *h;
 682         h = (xmpp_handler*) malloc(sizeof (xmpp_handler));
 683         h->Flags = Flags;
 684         h->Handler = Handler;
 685         Put(XMPP_EndHandlers, key, len, h, NULL);
 686 }
 687
 688 CTDL_MODULE_INIT(xmpp)
 689 {
 690         if (!threading) {
 691                 CtdlRegisterServiceHook(config.c_xmpp_c2s_port,
 692                                         NULL,
 693                                         xmpp_greeting,
 694                                         xmpp_command_loop,
 695                                         xmpp_async_loop,
 696                                         CitadelServiceXMPP);
 697
 698
 699                 XMPP_StartHandlers = NewHash(1, NULL);
 700                 XMPP_EndHandlers = NewHash(1, NULL);
 701
 702                 AddXMPPEndHandler(HKEY("resource"),      xmpp_end_resource, 0);
 703                 AddXMPPEndHandler(HKEY("username"),      xmpp_end_username, 0);
 704                 AddXMPPEndHandler(HKEY("password"),      xmpp_end_password, 0);
 705                 AddXMPPEndHandler(HKEY("iq"),            xmpp_end_iq, 0);
 706                 AddXMPPEndHandler(HKEY("auth"),          xmpp_end_auth, 0);
 707                 AddXMPPEndHandler(HKEY("session"),       xmpp_end_session, 0);
 708                 AddXMPPEndHandler(HKEY("body"),          xmpp_end_body, 0);
 709                 AddXMPPEndHandler(HKEY("html"),          xmpp_end_html, 0);
 710                 AddXMPPEndHandler(HKEY("starttls"),      xmpp_end_starttls, 0);
 711                 AddXMPPEndHandler(HKEY("ping"),          xmpp_end_ping, 0);
 712                 AddXMPPEndHandler(HKEY("stream"),        xmpp_end_stream, 0);
 713
 714                 AddXMPPStartHandler(HKEY("stream"),     xmpp_stream_start, 0);
 715                 AddXMPPStartHandler(HKEY("query"),      xmpp_start_query, 0);
 716                 AddXMPPStartHandler(HKEY("bind"),       xmpp_start_bind, 0);
 717                 AddXMPPStartHandler(HKEY("iq"),         xmpp_start_iq, 0);
 718                 AddXMPPStartHandler(HKEY("auth"),       xmpp_start_auth, 0);
 719                 AddXMPPStartHandler(HKEY("message"),    xmpp_start_message, 0);
 720                 AddXMPPStartHandler(HKEY("html"),       xmpp_start_html, 0);
 721
 722
 723                 CtdlRegisterDebugFlagHook(HKEY("serv_xmpp"), LogXMPPSrvDebugEnable, &XMPPSrvDebugEnable);
 724                 CtdlRegisterSessionHook(xmpp_cleanup_function, EVT_STOP, PRIO_STOP + 70);
 725                 CtdlRegisterSessionHook(xmpp_login_hook, EVT_LOGIN, PRIO_LOGIN + 90);
 726                 CtdlRegisterSessionHook(xmpp_logout_hook, EVT_LOGOUT, PRIO_LOGOUT + 90);
 727                 CtdlRegisterSessionHook(xmpp_login_hook, EVT_UNSTEALTH, PRIO_UNSTEALTH + 1);
 728                 CtdlRegisterSessionHook(xmpp_logout_hook, EVT_STEALTH, PRIO_STEALTH + 1);
 729                 CtdlRegisterCleanupHook(xmpp_cleanup_events);
 730
 731         }
 732
 733         /* return our module name for the log */
 734         return "xmpp";
 735 }