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