src/jserver/osrf_chat.c

   1 /*
   2 Copyright (C) 2005  Georgia Public Library Service
   3 Bill Erickson <billserickson@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU General Public License
   7 as published by the Free Software Foundation; either version 2
   8 of the License, or (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
  16 #include "osrf_chat.h"
  17 #include <string.h>
  18 #include <stdio.h>
  19 #include <time.h>
  20
  21 int __osrfChatXMLErrorOcurred = 0;
  22 int __osrfChatClientSentDisconnect = 0;
  23
  24 /* shorter version of strcmp */
  25 static int eq(const char* a, const char* b) { return (a && b && !strcmp(a,b)); }
  26 //#define eq(a,b) ((a && b && !strcmp(a,b)) ? 1 : 0)
  27
  28 /* gnarly debug function */
  29 static void chatdbg( osrfChatServer* server ) {
  30
  31         if(!server) return;
  32         return; /* heavy logging, should only be used in heavy debug mode */
  33
  34         growing_buffer* buf = buffer_init(256);
  35
  36         buffer_add(buf, "---------------------------------------------------------------------\n");
  37
  38         buffer_fadd(buf,
  39                 "ChopChop Debug:\n"
  40                 "Connections:           %lu\n"
  41                 "Named nodes in hash:   %lu\n"
  42                 "Domain:                %s\n"
  43                 "Port:                  %d\n"
  44                 "S2S Port:              %d\n"
  45                 "-------------------------------------------------------\n",
  46                 osrfListGetCount(server->nodeList), osrfHashGetCount(server->nodeHash),
  47                 server->domain, server->port, server->s2sport );
  48
  49         osrfListIterator* itr = osrfNewListIterator(server->nodeList);
  50         osrfChatNode* node;
  51
  52         while( (node = osrfListIteratorNext(itr)) ) {
  53
  54                 buffer_fadd( buf,
  55                         "sockid:    %d\n"
  56                         "Remote:    %s\n"
  57                         "State:     %d\n"
  58                         "XMLState:  %d\n"
  59                         "In Parse:  %d\n"
  60                         "to:        %s\n"
  61                         "Resource:  %s\n"
  62                         "Username:  %s\n"
  63                         "Domain:    %s\n"
  64                         "Authkey:   %s\n"
  65                         "type:          %d\n"
  66                         "-------------------------------------------------------\n",
  67                         node->sockid, node->remote, node->state, node->xmlstate, node->inparse,
  68                         node->to, node->resource, node->username, node->domain, node->authkey, node->type );
  69         }
  70
  71         osrfLogDebug( OSRF_LOG_MARK, "DEBUG:\n%s", buf->buf );
  72         buffer_free(buf);
  73         osrfListIteratorFree(itr);
  74 }
  75
  76 osrfChatServer* osrfNewChatServer( char* domain, char* secret, int s2sport ) {
  77         if(!(domain && secret)) return NULL;
  78
  79         osrfChatServer* server = safe_malloc(sizeof(osrfChatServer));
  80
  81         server->nodeHash        = osrfNewHash();
  82         server->nodeList        = osrfNewList();
  83         server->deadNodes = osrfNewList();
  84         server->nodeList->freeItem = &osrfChatNodeFree;
  85         server->domain          = strdup(domain);
  86         server->s2sport = s2sport;
  87
  88         server->mgr = safe_malloc(sizeof(socket_manager));
  89         server->mgr->data_received = &osrfChatHandleData;
  90         server->mgr->blob = server;
  91         server->mgr->on_socket_closed = &osrfChatSocketClosed;
  92
  93         if(secret) server->secret = strdup(secret);
  94         return server;
  95 }
  96
  97 void osrfChatCleanupClients( osrfChatServer* server ) {
  98         if(server) {
  99                 osrfListFree(server->deadNodes);
 100                 server->deadNodes = osrfNewList();
 101         }
 102 }
 103
 104
 105
 106 osrfChatNode* osrfNewChatNode( int sockid, char* domain ) {
 107         if(sockid < 1 || !domain) return NULL;
 108         osrfChatNode* node      = safe_malloc(sizeof(osrfChatNode));
 109         node->state                             = OSRF_CHAT_STATE_NONE;
 110         node->msgs                              = NULL; /* only s2s nodes cache messages */
 111         node->parserCtx         = xmlCreatePushParserCtxt(osrfChatSaxHandler, node, "", 0, NULL);
 112         node->msgDoc                    = xmlNewDoc(BAD_CAST "1.0");
 113         node->domain = strdup(domain);
 114         xmlKeepBlanksDefault(0);
 115         node->authkey                   = NULL;
 116         node->username                  = NULL;
 117         node->resource                  = NULL;
 118         node->to                                        = NULL;
 119         node->type = 0;
 120         return node;
 121 }
 122
 123
 124 osrfChatNode* osrfNewChatS2SNode( char* domain, char* remote ) {
 125         if(!(domain && remote)) return NULL;
 126         osrfChatNode* n = osrfNewChatNode( 1, domain );
 127         n->state                = OSRF_CHAT_STATE_S2S_CHALLENGE;
 128         n->sockid       = -1;
 129         n->remote       = strdup(remote);
 130         n->msgs         = osrfNewList();
 131         n->msgs->freeItem = &osrfChatS2SMessageFree;
 132         n->type = 1;
 133         return n;
 134 }
 135
 136 void osrfChatS2SMessageFree(void* n) { free(n); }
 137
 138 void osrfChatNodeFree( void* node ) {
 139         if(!node) return;
 140         osrfChatNode* n = (osrfChatNode*) node;
 141
 142         /* we can't free messages that are mid-parse because the
 143                 we can't free the parser context */
 144         if(n->inparse) {
 145                 n->inparse = 0;
 146                 osrfListPush(n->parent->deadNodes, n);
 147                 return;
 148         }
 149
 150         free(n->remote);
 151         free(n->to);
 152         free(n->username);
 153         free(n->resource);
 154         free(n->domain);
 155         free(n->authkey);
 156
 157         osrfListFree(n->msgs);
 158
 159         if(n->parserCtx) {
 160                 xmlFreeDoc(n->parserCtx->myDoc);
 161                 xmlFreeParserCtxt(n->parserCtx);
 162         }
 163
 164         xmlFreeDoc(n->msgDoc);
 165         free(n);
 166 }
 167
 168
 169
 170 int osrfChatServerConnect( osrfChatServer* cs,  int port, int s2sport, char* listenAddr ) {
 171         if(!(cs && port && listenAddr)) return -1;
 172         cs->port = port;
 173         cs->s2sport = s2sport;
 174         if( socket_open_tcp_server(cs->mgr, port, listenAddr ) < 0 )
 175                 return -1;
 176         if( socket_open_tcp_server(cs->mgr, s2sport, listenAddr ) < 0 )
 177                 return -1;
 178         return 0;
 179 }
 180
 181
 182 int osrfChatServerWait( osrfChatServer* server ) {
 183         if(!server) return -1;
 184         while(1) {
 185                 if(socket_wait_all(server->mgr, -1) < 0)
 186                         osrfLogWarning( OSRF_LOG_MARK,  "jserver_wait(): socket_wait_all() returned error");
 187         }
 188         return -1;
 189 }
 190
 191
 192 void osrfChatServerFree(osrfChatServer* server ) {
 193         if(!server) return;
 194         osrfHashFree(server->nodeHash);
 195         osrfListFree(server->nodeList);
 196         free(server->mgr);
 197         free(server->secret);
 198 }
 199
 200
 201 void osrfChatHandleData( void* cs,
 202         socket_manager* mgr, int sockid, char* data, int parent_id ) {
 203
 204         if(!(cs && mgr && sockid && data)) return;
 205
 206         osrfChatServer* server = (osrfChatServer*) cs;
 207
 208         osrfChatNode* node = osrfListGetIndex( server->nodeList, sockid );
 209
 210         if(node)
 211                 osrfLogDebug( OSRF_LOG_MARK, "Found node for sockid %d with state %d", sockid, node->state);
 212
 213         if(!node) {
 214                 osrfLogDebug( OSRF_LOG_MARK, "Adding new connection for sockid %d", sockid );
 215                 node = osrfChatAddNode( server, sockid );
 216         }
 217
 218         if(node) {
 219                 if( (osrfChatPushData( server, node, data ) == -1) ) {
 220                         osrfLogError( OSRF_LOG_MARK,
 221                                         "Node at socket %d with remote address %s and destination %s, "
 222                                         "received bad XML [%s], disconnecting...", sockid, node->remote, node->to, data );
 223                         osrfChatSendRaw(  node, OSRF_CHAT_PARSE_ERROR );
 224                         osrfChatRemoveNode( server, node );
 225                 }
 226         }
 227
 228         osrfChatCleanupClients(server); /* clean up old dead clients */
 229 }
 230
 231
 232 void osrfChatSocketClosed( void* blob, int sockid ) {
 233         if(!blob) return;
 234         osrfChatServer* server = (osrfChatServer*) blob;
 235         osrfChatNode* node = osrfListGetIndex(server->nodeList, sockid);
 236         osrfChatRemoveNode( server, node );
 237 }
 238
 239 osrfChatNode* osrfChatAddNode( osrfChatServer* server, int sockid ) {
 240         if(!(server && sockid)) return NULL;
 241         osrfChatNode* node = osrfNewChatNode(sockid, server->domain);
 242         node->parent = server;
 243         node->sockid = sockid;
 244         osrfListSet( server->nodeList, node, sockid );
 245         return node;
 246 }
 247
 248 void osrfChatRemoveNode( osrfChatServer* server, osrfChatNode* node ) {
 249         if(!(server && node)) return;
 250         socket_disconnect(server->mgr, node->sockid);
 251         if(node->remote)
 252                 osrfHashRemove( server->nodeHash, node->remote );
 253         osrfListRemove( server->nodeList, node->sockid ); /* this will free it */
 254 }
 255
 256 int osrfChatSendRaw( osrfChatNode* node, char* msgXML ) {
 257         if(!(node && msgXML)) return -1;
 258         return socket_send( node->sockid, msgXML );
 259 }
 260
 261
 262
 263
 264 void osrfChatNodeFinish( osrfChatServer* server, osrfChatNode* node ) {
 265         if(!(server && node)) return;
 266         osrfChatSendRaw( node, "</stream:stream>");
 267         osrfChatRemoveNode( server, node );
 268 }
 269
 270
 271 int osrfChatSend( osrfChatServer* cs, osrfChatNode* node, char* toAddr, char* fromAddr, char* msgXML ) {
 272         if(!(cs && node && toAddr && msgXML)) return -1;
 273
 274         int l = strlen(toAddr);
 275         char dombuf[l];
 276         bzero(dombuf, l);
 277         jid_get_domain( toAddr, dombuf, l );
 278
 279         if( eq( dombuf, cs->domain ) ) { /* this is to a user we host */
 280
 281                 osrfLogInfo( OSRF_LOG_MARK, "Sending message on local connection\nfrom: %s\nto: %s", fromAddr, toAddr );
 282                 osrfChatNode* tonode = osrfHashGet(cs->nodeHash, toAddr);
 283                 if(tonode) {
 284                         osrfChatSendRaw( tonode, msgXML );
 285
 286                 } else {
 287
 288                         /* send an error message saying we don't have this connection */
 289                         osrfLogInfo( OSRF_LOG_MARK, "We have no connection for %s", toAddr);
 290                         char* xml = va_list_to_string( OSRF_CHAT_NO_RECIPIENT, toAddr, fromAddr );
 291                         osrfChatSendRaw( node, xml );
 292                         free(xml);
 293                 }
 294
 295         } else {
 296
 297                 osrfChatNode* tonode = osrfHashGet(cs->nodeHash, dombuf);
 298                 if(tonode) {
 299                         if( tonode->state == OSRF_CHAT_STATE_CONNECTED ) {
 300                                 osrfLogDebug( OSRF_LOG_MARK, "Routing message to server %s", dombuf);
 301                                 osrfChatSendRaw( tonode, msgXML );
 302
 303                         } else {
 304                                 osrfLogInfo( OSRF_LOG_MARK, "Received s2s message and we're still trying to connect...caching");
 305                                 osrfListPush( tonode->msgs, strdup(msgXML) );
 306                         }
 307
 308                 } else {
 309
 310                         if( osrfChatInitS2S( cs, dombuf, toAddr, msgXML ) != 0 ) {
 311                                 osrfLogWarning( OSRF_LOG_MARK, "We are unable to connect to remote server %s for recipient %s", dombuf, toAddr);
 312                                 char* xml = va_list_to_string( OSRF_CHAT_NO_RECIPIENT, toAddr, fromAddr );
 313                                 osrfChatSendRaw( node, xml );
 314                                 free(xml);
 315                         }
 316                 }
 317         }
 318
 319         return 0;
 320 }
 321
 322
 323 /*
 324 void osrfChatCacheS2SMessage( char* toAddr, char* msgXML, osrfChatNode* snode ) {
 325         if(!(toAddr && msgXML)) return;
 326         osrfChatS2SMessage* msg = safe_malloc(sizeof(osrfChatS2SMessage));
 327         msg->toAddr = strdup(toAddr);
 328         msg->msgXML = strdup(msgXML);
 329         osrfLogInfo( OSRF_LOG_MARK, "Pushing client message onto s2s queue waiting for connect... ");
 330         osrfListPush( snode->msgs, msgXML );
 331 }
 332 */
 333
 334
 335 int osrfChatInitS2S( osrfChatServer* cs, char* remote, char* toAddr, char* msgXML ) {
 336         if(!(cs && remote && toAddr && msgXML)) return -1;
 337
 338         osrfLogInfo( OSRF_LOG_MARK, "Initing server2server connection to domain %s", remote );
 339         osrfChatNode* snode = osrfNewChatS2SNode( cs->domain, remote );
 340         snode->parent = cs;
 341
 342         /* try to connect to the remote site */
 343         snode->sockid = socket_open_tcp_client(cs->mgr, cs->s2sport, remote);
 344         if(snode->sockid < 1) {
 345                 osrfLogWarning( OSRF_LOG_MARK, "Unable to connect to remote server at %s", remote );
 346                 return -1;
 347         }
 348
 349         /* store the message we were supposed to deliver until we're fully connected */
 350         //osrfChatCacheS2SMessage( toAddr, msgXML, snode );
 351         osrfListPush( snode->msgs, strdup(msgXML) );
 352         osrfHashSet(cs->nodeHash, snode, remote );
 353         osrfListSet(cs->nodeList, snode, snode->sockid );
 354
 355         /* send the initial s2s request */
 356         osrfChatSendRaw( snode, OSRF_CHAT_S2S_INIT );
 357
 358         osrfLogDebug( OSRF_LOG_MARK, "Added new s2s node...");
 359         chatdbg(cs);
 360
 361         return 0;
 362 }
 363
 364
 365 /* commence SAX handling code */
 366
 367 int osrfChatPushData( osrfChatServer* server, osrfChatNode* node, char* data ) {
 368         if(!(node && data)) return -1;
 369
 370         chatdbg(server);
 371
 372         osrfLogDebug( OSRF_LOG_MARK, "pushing data into xml parser for node %d with state %d:\n%s",
 373                                                  node->sockid, node->state, data);
 374         node->inparse = 1;
 375         xmlParseChunk(node->parserCtx, data, strlen(data), 0);
 376         node->inparse = 0;
 377
 378         if(__osrfChatXMLErrorOcurred) {
 379                 __osrfChatXMLErrorOcurred = 0;
 380                 return -1;
 381         }
 382
 383         /* we can't do cleanup of the XML handlers while in the middle of a
 384                 data push, so set flags in the data push and doe the cleanup here */
 385         /*
 386         if(__osrfChatClientSentDisconnect) {
 387                 __osrfChatClientSentDisconnect  = 0;
 388                 osrfChatNodeFinish( server, node );
 389         }
 390         */
 391
 392         return 0;
 393 }
 394
 395
 396 void osrfChatStartStream( void* blob ) {
 397         osrfLogDebug( OSRF_LOG_MARK, "Starting new client stream...");
 398 }
 399
 400
 401 void osrfChatStartElement( void* blob, const xmlChar *name, const xmlChar **atts ) {
 402         if(!(blob && name)) return;
 403         osrfChatNode* node = (osrfChatNode*) blob;
 404
 405         int status = -1;
 406         char* nm = (char*) name;
 407
 408         osrfLogDebug( OSRF_LOG_MARK, "Starting element %s with namespace %s and node state %d",
 409                                                  nm, xmlSaxAttr(atts, "xmlns"), node->state );
 410
 411         switch( node->state ) {
 412
 413                 case OSRF_CHAT_STATE_NONE:
 414                         status = osrfChatHandleNewConnection( node, nm, atts );
 415                         osrfLogDebug( OSRF_LOG_MARK, "After NewConnection we have state %d", node->state);
 416                         break;
 417
 418                 case OSRF_CHAT_STATE_CONNECTING:
 419                         status = osrfChatHandleConnecting( node, nm, atts );
 420                         break;
 421
 422                 case OSRF_CHAT_STATE_CONNECTED:
 423                         status = osrfChatHandleConnected( node, nm, atts );
 424                         break;
 425
 426                 case OSRF_CHAT_STATE_S2S_CHALLENGE:
 427                         status = osrfChatHandleS2SChallenge( node, nm, atts );
 428                         break;
 429
 430                 case OSRF_CHAT_STATE_S2S_RESPONSE: /* server waiting for client response to challenge */
 431                         if(eq(nm, "db:result")) {
 432                                 char* remote = xmlSaxAttr(atts, "from");
 433                                 if(remote) node->remote = strdup(remote); /* copy off the client's id */
 434                                 status = 0;
 435                                 node->xmlstate |= OSRF_CHAT_STATE_INS2SRESULT;
 436                         } else status = -1;
 437                         break;
 438
 439                 case OSRF_CHAT_STATE_S2S_VERIFY:        /* client : waiting for server verify message */
 440                         if(eq(nm, "db:verify")) {
 441                                 char* id = xmlSaxAttr( atts, "id" );
 442                                 if(id) {
 443                                         char* xml = va_list_to_string( OSRF_CHAT_S2S_VERIFY_RESPONSE,
 444                                                         node->remote, node->domain, id );
 445                                         osrfChatSendRaw( node, xml );
 446                                         free(xml);
 447                                         node->state = OSRF_CHAT_STATE_S2S_VERIFY_FINAL;
 448                                         status = 0;
 449                                 }
 450                         }
 451                         break;
 452
 453                 case OSRF_CHAT_STATE_S2S_VERIFY_RESPONSE:       /* server waiting for client verify response */
 454                 case OSRF_CHAT_STATE_S2S_VERIFY_FINAL: /* client waitig for final verify */
 455                         status = osrfChatHandleS2SConnected( node, nm, atts );
 456                         break;
 457
 458         }
 459
 460         if(status != 0)
 461                 osrfChatParseError( node, "We don't know how to handle the XML data received" );
 462 }
 463
 464 #define CHAT_CHECK_VARS(x,y,z) if(!(x && y)) return -1; if(z) osrfLogDebug( OSRF_LOG_MARK, z);
 465
 466
 467
 468 int osrfChatHandleS2SConnected( osrfChatNode* node, const char* name, const xmlChar**atts ) {
 469         CHAT_CHECK_VARS(node, name, "osrfChatHandleS2SConnected" );
 470
 471         int status = -1;
 472
 473         if(eq(name,"db:verify")) { /* server receives verify from client */
 474                 char* xml = va_list_to_string(OSRF_CHAT_S2S_VERIFY_FINAL, node->domain, node->remote );
 475                 osrfChatSendRaw(node, xml );
 476                 free(xml);
 477                 status = 0;
 478         }
 479
 480         if(eq(name, "db:result")) {
 481                 /* send all the messages that we have queued for this server */
 482                 node->state = OSRF_CHAT_STATE_CONNECTED;
 483                 osrfListIterator* itr = osrfNewListIterator(node->msgs);
 484
 485                 char* xml;
 486                 while( (xml = (char*) osrfListIteratorNext(itr)) ) {
 487                         xmlDocPtr doc = xmlParseMemory(xml, strlen(xml));
 488                         if(doc) {
 489                                 char* from = (char*) xmlGetProp(xmlDocGetRootElement(doc), BAD_CAST "from");
 490                                 char* to = (char*) xmlGetProp(xmlDocGetRootElement(doc), BAD_CAST "to");
 491                                 osrfChatSend( node->parent, node, to, from, xml );
 492                                 osrfLogDebug( OSRF_LOG_MARK, "Sending cached message from %s to %s", from, to);
 493                                 xmlFree(to); xmlFree(from);
 494                                 xmlFreeDoc(doc);
 495                         }
 496                 }
 497
 498                 osrfListIteratorFree(itr);
 499                 osrfListFree(node->msgs);
 500                 node->msgs = NULL;
 501                 status = 0;
 502         }
 503
 504         if(status == 0) {
 505                 osrfLogInfo( OSRF_LOG_MARK, "Successfully made S2S connection to %s", node->remote );
 506                 node->state = OSRF_CHAT_STATE_CONNECTED;
 507                 node->xmlstate = 0;
 508         }
 509
 510         return status;
 511 }
 512
 513
 514 /** check the namespace of the stream message to see if it's a server or client connection */
 515 int osrfChatHandleNewConnection( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 516         CHAT_CHECK_VARS(node, name, "osrfChatHandleNewConnection()");
 517
 518         if(!eq(name, "stream:stream")) return -1;
 519
 520         node->authkey = osrfChatMkAuthKey();
 521         char* ns = xmlSaxAttr(atts, "xmlns");
 522         if(!ns) return -1;
 523
 524         if(eq(ns, "jabber:client")) { /* client connection */
 525
 526                 char* domain = xmlSaxAttr( atts, "to" );
 527                 if(!domain) return -1;
 528
 529                 if(!eq(domain, node->domain)) {
 530                         osrfLogWarning( OSRF_LOG_MARK, "Client attempting to connect to invalid domain");
 531                         return -1;
 532                 }
 533
 534                 char* buf = va_list_to_string( OSRF_CHAT_START_STREAM, domain, node->authkey );
 535                 node->state = OSRF_CHAT_STATE_CONNECTING;
 536
 537                 osrfLogDebug( OSRF_LOG_MARK, "Server node %d setting state to OSRF_CHAT_STATE_CONNECTING[%d]",
 538                                                          node->sockid, node->state );
 539
 540                 osrfLogDebug( OSRF_LOG_MARK, "Server responding to connect message with\n%s\n", buf );
 541                 osrfChatSendRaw( node, buf );
 542                 free(buf);
 543                 return 0;
 544         }
 545
 546         /* server to server init */
 547         if(eq(ns, "jabber:server")) { /* client connection */
 548                 osrfLogInfo( OSRF_LOG_MARK, "We received a new server 2 server connection, generating auth key...");
 549                 char* xml = va_list_to_string( OSRF_CHAT_S2S_CHALLENGE, node->authkey );
 550                 osrfChatSendRaw( node, xml );
 551                 free(xml);
 552                 node->state = OSRF_CHAT_STATE_S2S_RESPONSE; /* the next message should be the response */
 553                 node->type = 1;
 554                 return 0;
 555         }
 556
 557         return -1;
 558 }
 559
 560
 561
 562 char* osrfChatMkAuthKey() {
 563         char keybuf[112];
 564         bzero(keybuf, 112);
 565         snprintf(keybuf, 111, "%d%d%s", (int) time(NULL), getpid(), getenv("HOSTNAME"));
 566         return strdup(shahash(keybuf));
 567 }
 568
 569 int osrfChatHandleConnecting( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 570         CHAT_CHECK_VARS(node, name, "osrfChatHandleConnecting()");
 571         osrfLogDebug( OSRF_LOG_MARK, "Handling connect node %s", name );
 572
 573         if(eq(name, "iq")) node->xmlstate |= OSRF_CHAT_STATE_INIQ;
 574         else if(eq(name,"username")) node->xmlstate |= OSRF_CHAT_STATE_INUSERNAME;
 575         else if(eq(name,"resource")) node->xmlstate |= OSRF_CHAT_STATE_INRESOURCE;
 576         return 0;
 577 }
 578
 579 int osrfChatHandleConnected( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 580         CHAT_CHECK_VARS(node, name, "osrfChatHandleConnected()");
 581
 582         if(eq(name,"message")) {
 583
 584                 /* drop the old message and start with a new one */
 585                 xmlNodePtr root = xmlNewNode(NULL, name);
 586                 xmlAddAttrs(root, atts);
 587                 xmlNodePtr oldRoot = xmlDocSetRootElement(node->msgDoc, root);
 588                 free(node->to);
 589
 590                 char* to = xmlSaxAttr(atts, "to");
 591                 if(!to) to = "";
 592
 593                 node->to = strdup(to);
 594                 if(oldRoot) xmlFreeNode(oldRoot);
 595                 node->xmlstate = OSRF_CHAT_STATE_INMESSAGE;
 596
 597         } else {
 598
 599                 /* all non "message" nodes are simply added to the message */
 600                 xmlNodePtr nodep = xmlNewNode(NULL, name);
 601                 xmlAddAttrs(nodep, atts);
 602                 xmlAddChild(xmlDocGetRootElement(node->msgDoc), nodep);
 603         }
 604
 605         return 0;
 606 }
 607
 608 /* takes s2s secret, hashdomain, and the s2s auth token */
 609 static char* osrfChatGenerateS2SKey( char* secret, char* hashdomain, char* authtoken ) {
 610         if(!(secret && hashdomain && authtoken)) return NULL;
 611         osrfLogInfo( OSRF_LOG_MARK, "Generating s2s key with auth token: %s", authtoken );
 612         char* a = shahash(secret);
 613         osrfLogDebug( OSRF_LOG_MARK, "S2S secret hash: %s", a);
 614         char* b = va_list_to_string("%s%s", a, hashdomain);
 615         char* c = shahash(b);
 616         osrfLogDebug( OSRF_LOG_MARK, "S2S intermediate hash: %s", c);
 617         char* d = va_list_to_string("%s%s", c, authtoken);
 618         char* e = strdup(shahash(d));
 619         free(b); free(d);
 620         return e;
 621 }
 622
 623 int osrfChatHandleS2SChallenge( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 624         CHAT_CHECK_VARS(node, name, "osrfChatHandleS2SChallenge()");
 625
 626 /* here we respond to the stream challenge */
 627         if(eq(name, "stream:stream")) {
 628                 char* id = xmlSaxAttr(atts, "id");
 629                 if(id) {
 630                         /* we use our domain in the s2s challenge hash */
 631                         char* d = osrfChatGenerateS2SKey(node->parent->secret, node->domain, id );
 632                         char* e = va_list_to_string(OSRF_CHAT_S2S_RESPONSE, node->remote, node->domain, d );
 633                         osrfLogInfo( OSRF_LOG_MARK, "Answering s2s challenge with key:  %s", e );
 634                         osrfChatSendRaw( node, e );
 635                         free(d); free(e);
 636                         node->state = OSRF_CHAT_STATE_S2S_VERIFY;
 637                         return 0;
 638                 }
 639         }
 640
 641         return -1;
 642 }
 643
 644 /*
 645 int osrfChatHandleS2SResponse( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 646         CHAT_CHECK_VARS(node, name, "osrfChatHandleS2SResponse()");
 647
 648         if(eq(name, "db:result")) {
 649                 node->xmlstate |= OSRF_CHAT_STATE_INS2SRESULT;
 650                 return 0;
 651         }
 652
 653         return -1;
 654 }
 655 */
 656
 657
 658
 659 void osrfChatEndElement( void* blob, const xmlChar* name ) {
 660         if(!(blob && name)) return;
 661         osrfChatNode* node = (osrfChatNode*) blob;
 662
 663         char* nm = (char*) name;
 664
 665         if(eq(nm,"stream:stream")) {
 666                 osrfChatNodeFinish( node->parent, node );
 667                 return;
 668         }
 669
 670         if( node->state == OSRF_CHAT_STATE_CONNECTED ) {
 671                 if(eq(nm, "message")) {
 672
 673                         xmlNodePtr msg = xmlDocGetRootElement(node->msgDoc);
 674                         if(msg && node->type == 0)
 675                                 xmlSetProp(msg, BAD_CAST "from", BAD_CAST node->remote );
 676                         char* string = xmlDocToString(node->msgDoc, 0 );
 677
 678                         char* from = (char*) xmlGetProp(msg, BAD_CAST "from");
 679                         osrfLogDebug( OSRF_LOG_MARK,  "Routing message to %s\n%s\n", node->to, from, string );
 680                         osrfChatSend( node->parent, node, node->to, from, string );
 681                         xmlFree(from);
 682                         free(string);
 683                 }
 684         }
 685
 686         if( node->state == OSRF_CHAT_STATE_CONNECTING ) {
 687                 if( node->xmlstate & OSRF_CHAT_STATE_INIQ ) {
 688
 689                         if(eq(nm, "iq")) {
 690                                 node->xmlstate &= ~OSRF_CHAT_STATE_INIQ;
 691                                 node->remote = va_list_to_string(
 692                                                 "%s@%s/%s", node->username, node->domain, node->resource );
 693
 694                                 osrfLogInfo( OSRF_LOG_MARK, "%s successfully logged in", node->remote );
 695
 696                                 osrfLogDebug( OSRF_LOG_MARK, "Setting remote address to %s", node->remote );
 697                                 osrfChatSendRaw( node, OSRF_CHAT_LOGIN_OK );
 698                                 if(osrfHashGet( node->parent->nodeHash, node->remote ) ) {
 699                                         osrfLogWarning( OSRF_LOG_MARK, "New node replaces existing node for remote id %s", node->remote);
 700                                         osrfHashRemove(node->parent->nodeHash, node->remote);
 701                                 }
 702                                 osrfHashSet( node->parent->nodeHash, node, node->remote );
 703                                 node->state = OSRF_CHAT_STATE_CONNECTED;
 704                         }
 705                 }
 706         }
 707 }
 708
 709
 710 void osrfChatHandleCharacter( void* blob, const xmlChar *ch, int len) {
 711         if(!(blob && ch && len)) return;
 712         osrfChatNode* node = (osrfChatNode*) blob;
 713
 714         /*
 715         osrfLogDebug( OSRF_LOG_MARK, "Char Handler: state %d, xmlstate %d, chardata %s",
 716                         node->state, node->xmlstate, (char*) ch );
 717                         */
 718
 719         if( node->state == OSRF_CHAT_STATE_CONNECTING ) {
 720                 if( node->xmlstate & OSRF_CHAT_STATE_INIQ ) {
 721
 722                         if( node->xmlstate & OSRF_CHAT_STATE_INUSERNAME ) {
 723                                 free(node->username);
 724                                 node->username = strndup((char*) ch, len);
 725                                 node->xmlstate &= ~OSRF_CHAT_STATE_INUSERNAME;
 726                         }
 727
 728                         if( node->xmlstate & OSRF_CHAT_STATE_INRESOURCE ) {
 729                                 free(node->resource);
 730                                 node->resource = strndup((char*) ch, len);
 731                                 node->xmlstate &= ~OSRF_CHAT_STATE_INRESOURCE;
 732                         }
 733                 }
 734
 735                 return;
 736         }
 737
 738         if( node->state == OSRF_CHAT_STATE_CONNECTED ) {
 739                 xmlNodePtr last = xmlGetLastChild(xmlDocGetRootElement(node->msgDoc));
 740                 xmlNodePtr txt = xmlNewTextLen(ch, len);
 741                 xmlAddChild(last, txt);
 742                 return;
 743         }
 744
 745         if( node->state == OSRF_CHAT_STATE_S2S_RESPONSE &&
 746                         (node->xmlstate & OSRF_CHAT_STATE_INS2SRESULT) ) {
 747
 748                 char* key = strndup((char*) ch, len);
 749                 osrfLogDebug( OSRF_LOG_MARK, "Got s2s key from %s : %s", node->remote, key );
 750                 char* e = osrfChatGenerateS2SKey(node->parent->secret, node->remote, node->authkey );
 751                 osrfLogInfo( OSRF_LOG_MARK, "\nReceived s2s key from server: %s\nKey should be: %s", key, e );
 752
 753                 if(eq(key, e)) {
 754                         char* msg = va_list_to_string(OSRF_CHAT_S2S_VERIFY_REQUEST,
 755                                         node->authkey, node->domain, node->remote, e );
 756                         osrfChatSendRaw(node, msg );
 757                         free(msg);
 758                         node->state = OSRF_CHAT_STATE_S2S_VERIFY_RESPONSE;
 759                         node->xmlstate = 0;
 760
 761                 } else {
 762                         osrfLogWarning( OSRF_LOG_MARK, "Server2Server keys do not match!");
 763                 }
 764
 765                 /* do the hash dance again */
 766         }
 767
 768         /* XXX free 'e' and 'key' ?? */
 769
 770 }
 771
 772
 773 void osrfChatParseError( void* blob, const char* msg, ... ) {
 774
 775         __osrfChatXMLErrorOcurred = 1;
 776 }
 777
 778
 779
 780