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 static int osrfChatXMLErrorOcurred = 0;
  22 static 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->secret      = strdup(secret);
  87         server->s2sport = s2sport;
  88         server->port        = 0;
  89
  90         // Build socket manager
  91         server->mgr = safe_malloc(sizeof(socket_manager));
  92         server->mgr->data_received = &osrfChatHandleData;
  93         server->mgr->blob = server;
  94         server->mgr->on_socket_closed = &osrfChatSocketClosed;
  95
  96         return server;
  97 }
  98
  99 void osrfChatCleanupClients( osrfChatServer* server ) {
 100         if(!server) return;
 101         osrfListFree(server->deadNodes);
 102         server->deadNodes = osrfNewList();
 103 }
 104
 105
 106
 107 osrfChatNode* osrfNewChatNode( int sockid, char* domain ) {
 108         if(sockid < 1 || !domain) return NULL;
 109         osrfChatNode* node      = safe_malloc(sizeof(osrfChatNode));
 110         node->state                             = OSRF_CHAT_STATE_NONE;
 111         node->msgs                              = NULL; /* only s2s nodes cache messages */
 112         node->parserCtx         = xmlCreatePushParserCtxt(osrfChatSaxHandler, node, "", 0, NULL);
 113         node->msgDoc                    = xmlNewDoc(BAD_CAST "1.0");
 114         node->domain = strdup(domain);
 115         xmlKeepBlanksDefault(0);
 116         node->authkey                   = NULL;
 117         node->username                  = NULL;
 118         node->resource                  = NULL;
 119         node->to                                        = NULL;
 120         node->type = 0;
 121         return node;
 122 }
 123
 124
 125 osrfChatNode* osrfNewChatS2SNode( char* domain, char* remote ) {
 126         if(!(domain && remote)) return NULL;
 127         osrfChatNode* n = osrfNewChatNode( 1, domain );
 128         n->state                = OSRF_CHAT_STATE_S2S_CHALLENGE;
 129         n->sockid       = -1;
 130         n->remote       = strdup(remote);
 131         n->msgs         = osrfNewList();
 132         n->msgs->freeItem = &osrfChatS2SMessageFree;
 133         n->type = 1;
 134         return n;
 135 }
 136
 137 void osrfChatS2SMessageFree(void* n) { free(n); }
 138
 139 void osrfChatNodeFree( void* node ) {
 140         if(!node) return;
 141         osrfChatNode* n = (osrfChatNode*) node;
 142
 143         /* we can't free messages that are mid-parse because the
 144                 we can't free the parser context */
 145         if(n->inparse) {
 146                 n->inparse = 0;
 147                 osrfListPush(n->parent->deadNodes, n);
 148                 return;
 149         }
 150
 151         free(n->remote);
 152         free(n->to);
 153         free(n->username);
 154         free(n->resource);
 155         free(n->domain);
 156         free(n->authkey);
 157
 158         osrfListFree(n->msgs);
 159
 160         if(n->parserCtx) {
 161                 xmlFreeDoc(n->parserCtx->myDoc);
 162                 xmlFreeParserCtxt(n->parserCtx);
 163         }
 164
 165         xmlFreeDoc(n->msgDoc);
 166         free(n);
 167 }
 168
 169
 170
 171 int osrfChatServerConnect( osrfChatServer* cs,  int port, int s2sport, char* listenAddr ) {
 172         if(!(cs && port && listenAddr)) return -1;
 173         cs->port = port;
 174         cs->s2sport = s2sport;
 175         if( socket_open_tcp_server(cs->mgr, port, listenAddr ) < 0 )
 176                 return -1;
 177         if( socket_open_tcp_server(cs->mgr, s2sport, listenAddr ) < 0 )
 178                 return -1;
 179         return 0;
 180 }
 181
 182
 183 int osrfChatServerWait( osrfChatServer* server ) {
 184         if(!server) return -1;
 185         while(1) {
 186                 if(socket_wait_all(server->mgr, -1) < 0)
 187                         osrfLogWarning( OSRF_LOG_MARK,  "jserver_wait(): socket_wait_all() returned error");
 188         }
 189         return -1;
 190 }
 191
 192
 193 void osrfChatServerFree(osrfChatServer* server ) {
 194         if(!server) return;
 195         osrfHashFree(server->nodeHash);
 196         osrfListFree(server->nodeList);
 197         osrfListFree(server->deadNodes);
 198         free(server->mgr);
 199         free(server->domain);
 200         free(server->secret);
 201
 202         free(server);
 203 }
 204
 205
 206 void osrfChatHandleData( void* cs,
 207         socket_manager* mgr, int sockid, char* data, int parent_id ) {
 208
 209         if(!(cs && mgr && sockid && data)) return;
 210
 211         osrfChatServer* server = (osrfChatServer*) cs;
 212
 213         osrfChatNode* node = osrfListGetIndex( server->nodeList, sockid );
 214
 215         if(node)
 216                 osrfLogDebug( OSRF_LOG_MARK, "Found node for sockid %d with state %d", sockid, node->state);
 217
 218         if(!node) {
 219                 osrfLogDebug( OSRF_LOG_MARK, "Adding new connection for sockid %d", sockid );
 220                 node = osrfChatAddNode( server, sockid );
 221         }
 222
 223         if(node) {
 224                 if( (osrfChatPushData( server, node, data ) == -1) ) {
 225                         osrfLogError( OSRF_LOG_MARK,
 226                                         "Node at socket %d with remote address %s and destination %s, "
 227                                         "received bad XML [%s], disconnecting...", sockid, node->remote, node->to, data );
 228                         osrfChatSendRaw(  node, OSRF_CHAT_PARSE_ERROR );
 229                         osrfChatRemoveNode( server, node );
 230                 }
 231         }
 232
 233         osrfChatCleanupClients(server); /* clean up old dead clients */
 234 }
 235
 236
 237 void osrfChatSocketClosed( void* blob, int sockid ) {
 238         if(!blob) return;
 239         osrfChatServer* server = (osrfChatServer*) blob;
 240         osrfChatNode* node = osrfListGetIndex(server->nodeList, sockid);
 241         osrfChatRemoveNode( server, node );
 242 }
 243
 244 osrfChatNode* osrfChatAddNode( osrfChatServer* server, int sockid ) {
 245         if(!(server && sockid)) return NULL;
 246         osrfChatNode* node = osrfNewChatNode(sockid, server->domain);
 247         node->parent = server;
 248         node->sockid = sockid;
 249         osrfListSet( server->nodeList, node, sockid );
 250         return node;
 251 }
 252
 253 void osrfChatRemoveNode( osrfChatServer* server, osrfChatNode* node ) {
 254         if(!(server && node)) return;
 255         socket_disconnect(server->mgr, node->sockid);
 256         if(node->remote)
 257                 osrfHashRemove( server->nodeHash, node->remote );
 258         osrfListRemove( server->nodeList, node->sockid ); /* this will free it */
 259 }
 260
 261 int osrfChatSendRaw( osrfChatNode* node, char* msgXML ) {
 262         if(!(node && msgXML)) return -1;
 263         /* wait at most 3 second for this client to take our data */
 264         return socket_send_timeout( node->sockid, msgXML, 3000000 );
 265 }
 266
 267 void osrfChatNodeFinish( osrfChatServer* server, osrfChatNode* node ) {
 268         if(!(server && node)) return;
 269         osrfChatSendRaw( node, "</stream:stream>");
 270         osrfChatRemoveNode( server, node );
 271 }
 272
 273
 274 int osrfChatSend( osrfChatServer* cs, osrfChatNode* node, char* toAddr, char* fromAddr, char* msgXML ) {
 275         if(!(cs && node && toAddr && msgXML)) return -1;
 276
 277         int l = strlen(toAddr);
 278         char dombuf[l];
 279         bzero(dombuf, l);
 280         jid_get_domain( toAddr, dombuf, l );
 281
 282         if( eq( dombuf, cs->domain ) ) { /* this is to a user we host */
 283
 284                 osrfLogInfo( OSRF_LOG_MARK, "Sending message on local connection\nfrom: %s\nto: %s", fromAddr, toAddr );
 285                 osrfChatNode* tonode = osrfHashGet(cs->nodeHash, toAddr);
 286                 if(tonode) {
 287
 288                         /* if we can't send to the recipient (recipient is gone or too busy,
 289                          * we drop the recipient and inform the sender that the recipient
 290                          * is no more */
 291                         if( osrfChatSendRaw( tonode, msgXML ) < 0 ) {
 292
 293                                 osrfChatRemoveNode( cs, tonode );
 294                                 char* xml = va_list_to_string( OSRF_CHAT_NO_RECIPIENT, toAddr, fromAddr );
 295
 296                                 osrfLogError( OSRF_LOG_MARK, "Node failed to function. "
 297                                                 "Responding to caller with error: %s", toAddr);
 298
 299
 300                                 if( osrfChatSendRaw( node, xml ) < 0 ) {
 301                                         osrfLogError(OSRF_LOG_MARK, "Sending node is now gone..removing");
 302                                         osrfChatRemoveNode( cs, node );
 303                                 }
 304                                 free(xml);
 305                         }
 306
 307                 } else {
 308
 309                         /* send an error message saying we don't have this connection */
 310                         osrfLogInfo( OSRF_LOG_MARK, "We have no connection for %s", toAddr);
 311                         char* xml = va_list_to_string( OSRF_CHAT_NO_RECIPIENT, toAddr, fromAddr );
 312                         if( osrfChatSendRaw( node, xml ) < 0 )
 313                                 osrfChatRemoveNode( cs, node );
 314                         free(xml);
 315                 }
 316
 317         } else {
 318
 319                 osrfChatNode* tonode = osrfHashGet(cs->nodeHash, dombuf);
 320                 if(tonode) {
 321                         if( tonode->state == OSRF_CHAT_STATE_CONNECTED ) {
 322                                 osrfLogDebug( OSRF_LOG_MARK, "Routing message to server %s", dombuf);
 323
 324                                 if( osrfChatSendRaw( tonode, msgXML ) < 0 ) {
 325                                         osrfLogError( OSRF_LOG_MARK, "Node failed to function: %s", toAddr);
 326                                         char* xml = va_list_to_string( OSRF_CHAT_NO_RECIPIENT, toAddr, fromAddr );
 327                                         if( osrfChatSendRaw( node, xml ) < 0 )
 328                                                 osrfChatRemoveNode( cs, node );
 329                                         free(xml);
 330                                         osrfChatRemoveNode( cs, tonode );
 331                                 }
 332
 333                         } else {
 334                                 osrfLogInfo( OSRF_LOG_MARK, "Received s2s message and we're still trying to connect...caching");
 335                                 osrfListPush( tonode->msgs, strdup(msgXML) );
 336                         }
 337
 338                 } else {
 339
 340                         if( osrfChatInitS2S( cs, dombuf, toAddr, msgXML ) != 0 ) {
 341                                 osrfLogWarning( OSRF_LOG_MARK, "We are unable to connect to remote server %s for recipient %s", dombuf, toAddr);
 342                                 char* xml = va_list_to_string( OSRF_CHAT_NO_RECIPIENT, toAddr, fromAddr );
 343                                 osrfChatSendRaw( node, xml );
 344                                 free(xml);
 345                         }
 346                 }
 347         }
 348
 349         return 0;
 350 }
 351
 352
 353 /*
 354 void osrfChatCacheS2SMessage( char* toAddr, char* msgXML, osrfChatNode* snode ) {
 355         if(!(toAddr && msgXML)) return;
 356         osrfChatS2SMessage* msg = safe_malloc(sizeof(osrfChatS2SMessage));
 357         msg->toAddr = strdup(toAddr);
 358         msg->msgXML = strdup(msgXML);
 359         osrfLogInfo( OSRF_LOG_MARK, "Pushing client message onto s2s queue waiting for connect... ");
 360         osrfListPush( snode->msgs, msgXML );
 361 }
 362 */
 363
 364
 365 int osrfChatInitS2S( osrfChatServer* cs, char* remote, char* toAddr, char* msgXML ) {
 366         if(!(cs && remote && toAddr && msgXML)) return -1;
 367
 368         osrfLogInfo( OSRF_LOG_MARK, "Initing server2server connection to domain %s", remote );
 369         osrfChatNode* snode = osrfNewChatS2SNode( cs->domain, remote );
 370         snode->parent = cs;
 371
 372         /* try to connect to the remote site */
 373         snode->sockid = socket_open_tcp_client(cs->mgr, cs->s2sport, remote);
 374         if(snode->sockid < 1) {
 375                 osrfLogWarning( OSRF_LOG_MARK, "Unable to connect to remote server at %s", remote );
 376                 return -1;
 377         }
 378
 379         /* store the message we were supposed to deliver until we're fully connected */
 380         //osrfChatCacheS2SMessage( toAddr, msgXML, snode );
 381         osrfListPush( snode->msgs, strdup(msgXML) );
 382         osrfHashSet(cs->nodeHash, snode, remote );
 383         osrfListSet(cs->nodeList, snode, snode->sockid );
 384
 385         /* send the initial s2s request */
 386         osrfChatSendRaw( snode, OSRF_CHAT_S2S_INIT );
 387
 388         osrfLogDebug( OSRF_LOG_MARK, "Added new s2s node...");
 389         chatdbg(cs);
 390
 391         return 0;
 392 }
 393
 394
 395 /* commence SAX handling code */
 396
 397 int osrfChatPushData( osrfChatServer* server, osrfChatNode* node, char* data ) {
 398         if(!(node && data)) return -1;
 399
 400         chatdbg(server);
 401
 402         osrfLogDebug( OSRF_LOG_MARK, "pushing data into xml parser for node %d with state %d:\n%s",
 403                                                  node->sockid, node->state, data);
 404         node->inparse = 1;
 405         xmlParseChunk(node->parserCtx, data, strlen(data), 0);
 406         node->inparse = 0;
 407
 408         if(osrfChatXMLErrorOcurred) {
 409                 osrfChatXMLErrorOcurred = 0;
 410                 return -1;
 411         }
 412
 413         /* we can't do cleanup of the XML handlers while in the middle of a
 414                 data push, so set flags in the data push and doe the cleanup here */
 415         /*
 416         if(osrfChatClientSentDisconnect) {
 417                 osrfChatClientSentDisconnect  = 0;
 418                 osrfChatNodeFinish( server, node );
 419         }
 420         */
 421
 422         return 0;
 423 }
 424
 425
 426 void osrfChatStartStream( void* blob ) {
 427         osrfLogDebug( OSRF_LOG_MARK, "Starting new client stream...");
 428 }
 429
 430
 431 void osrfChatStartElement( void* blob, const xmlChar *name, const xmlChar **atts ) {
 432         if(!(blob && name)) return;
 433         osrfChatNode* node = (osrfChatNode*) blob;
 434
 435         int status = -1;
 436         char* nm = (char*) name;
 437
 438         osrfLogDebug( OSRF_LOG_MARK, "Starting element %s with namespace %s and node state %d",
 439                                                  nm, xmlSaxAttr(atts, "xmlns"), node->state );
 440
 441         switch( node->state ) {
 442
 443                 case OSRF_CHAT_STATE_NONE:
 444                         status = osrfChatHandleNewConnection( node, nm, atts );
 445                         osrfLogDebug( OSRF_LOG_MARK, "After NewConnection we have state %d", node->state);
 446                         break;
 447
 448                 case OSRF_CHAT_STATE_CONNECTING:
 449                         status = osrfChatHandleConnecting( node, nm, atts );
 450                         break;
 451
 452                 case OSRF_CHAT_STATE_CONNECTED:
 453                         status = osrfChatHandleConnected( node, nm, atts );
 454                         break;
 455
 456                 case OSRF_CHAT_STATE_S2S_CHALLENGE:
 457                         status = osrfChatHandleS2SChallenge( node, nm, atts );
 458                         break;
 459
 460                 case OSRF_CHAT_STATE_S2S_RESPONSE: /* server waiting for client response to challenge */
 461                         if(eq(nm, "db:result")) {
 462                                 char* remote = xmlSaxAttr(atts, "from");
 463                                 if(remote) node->remote = strdup(remote); /* copy off the client's id */
 464                                 status = 0;
 465                                 node->xmlstate |= OSRF_CHAT_STATE_INS2SRESULT;
 466                         } else status = -1;
 467                         break;
 468
 469                 case OSRF_CHAT_STATE_S2S_VERIFY:        /* client : waiting for server verify message */
 470                         if(eq(nm, "db:verify")) {
 471                                 char* id = xmlSaxAttr( atts, "id" );
 472                                 if(id) {
 473                                         char* xml = va_list_to_string( OSRF_CHAT_S2S_VERIFY_RESPONSE,
 474                                                         node->remote, node->domain, id );
 475                                         osrfChatSendRaw( node, xml );
 476                                         free(xml);
 477                                         node->state = OSRF_CHAT_STATE_S2S_VERIFY_FINAL;
 478                                         status = 0;
 479                                 }
 480                         }
 481                         break;
 482
 483                 case OSRF_CHAT_STATE_S2S_VERIFY_RESPONSE:       /* server waiting for client verify response */
 484                 case OSRF_CHAT_STATE_S2S_VERIFY_FINAL: /* client waitig for final verify */
 485                         status = osrfChatHandleS2SConnected( node, nm, atts );
 486                         break;
 487
 488         }
 489
 490         if(status != 0)
 491                 osrfChatParseError( node, "We don't know how to handle the XML data received" );
 492 }
 493
 494 #define CHAT_CHECK_VARS(x,y,z) if(!(x && y)) return -1; if(z) osrfLogDebug( OSRF_LOG_MARK, z);
 495
 496
 497
 498 int osrfChatHandleS2SConnected( osrfChatNode* node, const char* name, const xmlChar**atts ) {
 499         CHAT_CHECK_VARS(node, name, "osrfChatHandleS2SConnected" );
 500
 501         int status = -1;
 502
 503         if(eq(name,"db:verify")) { /* server receives verify from client */
 504                 char* xml = va_list_to_string(OSRF_CHAT_S2S_VERIFY_FINAL, node->domain, node->remote );
 505                 osrfChatSendRaw(node, xml );
 506                 free(xml);
 507                 status = 0;
 508         }
 509
 510         if(eq(name, "db:result")) {
 511                 /* send all the messages that we have queued for this server */
 512                 node->state = OSRF_CHAT_STATE_CONNECTED;
 513                 osrfListIterator* itr = osrfNewListIterator(node->msgs);
 514
 515                 char* xml;
 516                 while( (xml = (char*) osrfListIteratorNext(itr)) ) {
 517                         xmlDocPtr doc = xmlParseMemory(xml, strlen(xml));
 518                         if(doc) {
 519                                 char* from = (char*) xmlGetProp(xmlDocGetRootElement(doc), BAD_CAST "from");
 520                                 char* to = (char*) xmlGetProp(xmlDocGetRootElement(doc), BAD_CAST "to");
 521                                 osrfChatSend( node->parent, node, to, from, xml );
 522                                 osrfLogDebug( OSRF_LOG_MARK, "Sending cached message from %s to %s", from, to);
 523                                 xmlFree(to); xmlFree(from);
 524                                 xmlFreeDoc(doc);
 525                         }
 526                 }
 527
 528                 osrfListIteratorFree(itr);
 529                 osrfListFree(node->msgs);
 530                 node->msgs = NULL;
 531                 status = 0;
 532         }
 533
 534         if(status == 0) {
 535                 osrfLogInfo( OSRF_LOG_MARK, "Successfully made S2S connection to %s", node->remote );
 536                 node->state = OSRF_CHAT_STATE_CONNECTED;
 537                 node->xmlstate = 0;
 538         }
 539
 540         return status;
 541 }
 542
 543
 544 /** check the namespace of the stream message to see if it's a server or client connection */
 545 int osrfChatHandleNewConnection( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 546         CHAT_CHECK_VARS(node, name, "osrfChatHandleNewConnection()");
 547
 548         if(!eq(name, "stream:stream")) return -1;
 549
 550         node->authkey = osrfChatMkAuthKey();
 551         char* ns = xmlSaxAttr(atts, "xmlns");
 552         if(!ns) return -1;
 553
 554         if(eq(ns, "jabber:client")) { /* client connection */
 555
 556                 char* domain = xmlSaxAttr( atts, "to" );
 557                 if(!domain) return -1;
 558
 559                 if(!eq(domain, node->domain)) {
 560                         osrfLogWarning( OSRF_LOG_MARK,
 561                                 "Client attempting to connect to invalid domain %s. Our domain is %s", domain, node->domain);
 562                         return -1;
 563                 }
 564
 565                 char* buf = va_list_to_string( OSRF_CHAT_START_STREAM, domain, node->authkey );
 566                 node->state = OSRF_CHAT_STATE_CONNECTING;
 567
 568                 osrfLogDebug( OSRF_LOG_MARK, "Server node %d setting state to OSRF_CHAT_STATE_CONNECTING[%d]",
 569                                                          node->sockid, node->state );
 570
 571                 osrfLogDebug( OSRF_LOG_MARK, "Server responding to connect message with\n%s\n", buf );
 572                 osrfChatSendRaw( node, buf );
 573                 free(buf);
 574                 return 0;
 575         }
 576
 577         /* server to server init */
 578         if(eq(ns, "jabber:server")) { /* client connection */
 579                 osrfLogInfo( OSRF_LOG_MARK, "We received a new server 2 server connection, generating auth key...");
 580                 char* xml = va_list_to_string( OSRF_CHAT_S2S_CHALLENGE, node->authkey );
 581                 osrfChatSendRaw( node, xml );
 582                 free(xml);
 583                 node->state = OSRF_CHAT_STATE_S2S_RESPONSE; /* the next message should be the response */
 584                 node->type = 1;
 585                 return 0;
 586         }
 587
 588         return -1;
 589 }
 590
 591
 592
 593 char* osrfChatMkAuthKey() {
 594         char keybuf[112];
 595         bzero(keybuf, 112);
 596         snprintf(keybuf, 111, "%d%ld%s", (int) time(NULL), (long) getpid(), getenv("HOSTNAME"));
 597         return strdup(shahash(keybuf));
 598 }
 599
 600 int osrfChatHandleConnecting( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 601         CHAT_CHECK_VARS(node, name, "osrfChatHandleConnecting()");
 602         osrfLogDebug( OSRF_LOG_MARK, "Handling connect node %s", name );
 603
 604         if(eq(name, "iq")) node->xmlstate |= OSRF_CHAT_STATE_INIQ;
 605         else if(eq(name,"username")) node->xmlstate |= OSRF_CHAT_STATE_INUSERNAME;
 606         else if(eq(name,"resource")) node->xmlstate |= OSRF_CHAT_STATE_INRESOURCE;
 607         return 0;
 608 }
 609
 610 int osrfChatHandleConnected( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 611         CHAT_CHECK_VARS(node, name, "osrfChatHandleConnected()");
 612
 613         if(eq(name,"message")) {
 614
 615                 /* drop the old message and start with a new one */
 616                 xmlNodePtr root = xmlNewNode(NULL, name);
 617                 xmlAddAttrs(root, atts);
 618                 xmlNodePtr oldRoot = xmlDocSetRootElement(node->msgDoc, root);
 619                 free(node->to);
 620
 621                 char* to = xmlSaxAttr(atts, "to");
 622                 if(!to) to = "";
 623
 624                 node->to = strdup(to);
 625                 if(oldRoot) xmlFreeNode(oldRoot);
 626                 node->xmlstate = OSRF_CHAT_STATE_INMESSAGE;
 627
 628         } else {
 629
 630                 /* all non "message" nodes are simply added to the message */
 631                 xmlNodePtr nodep = xmlNewNode(NULL, name);
 632                 xmlAddAttrs(nodep, atts);
 633                 xmlAddChild(xmlDocGetRootElement(node->msgDoc), nodep);
 634         }
 635
 636         return 0;
 637 }
 638
 639 /* takes s2s secret, hashdomain, and the s2s auth token */
 640 static char* osrfChatGenerateS2SKey( char* secret, char* hashdomain, char* authtoken ) {
 641         if(!(secret && hashdomain && authtoken)) return NULL;
 642         osrfLogInfo( OSRF_LOG_MARK, "Generating s2s key with auth token: %s", authtoken );
 643         char* a = shahash(secret);
 644         osrfLogDebug( OSRF_LOG_MARK, "S2S secret hash: %s", a);
 645         char* b = va_list_to_string("%s%s", a, hashdomain);
 646         char* c = shahash(b);
 647         osrfLogDebug( OSRF_LOG_MARK, "S2S intermediate hash: %s", c);
 648         char* d = va_list_to_string("%s%s", c, authtoken);
 649         char* e = strdup(shahash(d));
 650         free(b); free(d);
 651         return e;
 652 }
 653
 654 int osrfChatHandleS2SChallenge( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 655         CHAT_CHECK_VARS(node, name, "osrfChatHandleS2SChallenge()");
 656
 657 /* here we respond to the stream challenge */
 658         if(eq(name, "stream:stream")) {
 659                 char* id = xmlSaxAttr(atts, "id");
 660                 if(id) {
 661                         /* we use our domain in the s2s challenge hash */
 662                         char* d = osrfChatGenerateS2SKey(node->parent->secret, node->domain, id );
 663                         char* e = va_list_to_string(OSRF_CHAT_S2S_RESPONSE, node->remote, node->domain, d );
 664                         osrfLogInfo( OSRF_LOG_MARK, "Answering s2s challenge with key:  %s", e );
 665                         osrfChatSendRaw( node, e );
 666                         free(d); free(e);
 667                         node->state = OSRF_CHAT_STATE_S2S_VERIFY;
 668                         return 0;
 669                 }
 670         }
 671
 672         return -1;
 673 }
 674
 675 /*
 676 int osrfChatHandleS2SResponse( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 677         CHAT_CHECK_VARS(node, name, "osrfChatHandleS2SResponse()");
 678
 679         if(eq(name, "db:result")) {
 680                 node->xmlstate |= OSRF_CHAT_STATE_INS2SRESULT;
 681                 return 0;
 682         }
 683
 684         return -1;
 685 }
 686 */
 687
 688
 689
 690 void osrfChatEndElement( void* blob, const xmlChar* name ) {
 691         if(!(blob && name)) return;
 692         osrfChatNode* node = (osrfChatNode*) blob;
 693
 694         char* nm = (char*) name;
 695
 696         if(eq(nm,"stream:stream")) {
 697                 osrfChatNodeFinish( node->parent, node );
 698                 return;
 699         }
 700
 701         if( node->state == OSRF_CHAT_STATE_CONNECTED ) {
 702                 if(eq(nm, "message")) {
 703
 704                         xmlNodePtr msg = xmlDocGetRootElement(node->msgDoc);
 705                         if(msg && node->type == 0)
 706                                 xmlSetProp(msg, BAD_CAST "from", BAD_CAST node->remote );
 707                         char* string = xmlDocToString(node->msgDoc, 0 );
 708
 709                         char* from = (char*) xmlGetProp(msg, BAD_CAST "from");
 710                         osrfLogDebug( OSRF_LOG_MARK,  "Routing message to %s\n%s\n", node->to, from, string );
 711                         osrfChatSend( node->parent, node, node->to, from, string );
 712                         xmlFree(from);
 713                         free(string);
 714                 }
 715         }
 716
 717         if( node->state == OSRF_CHAT_STATE_CONNECTING ) {
 718                 if( node->xmlstate & OSRF_CHAT_STATE_INIQ ) {
 719
 720                         if(eq(nm, "iq")) {
 721                                 node->xmlstate &= ~OSRF_CHAT_STATE_INIQ;
 722                                 node->remote = va_list_to_string(
 723                                                 "%s@%s/%s", node->username, node->domain, node->resource );
 724
 725                                 osrfLogInfo( OSRF_LOG_MARK, "%s successfully logged in", node->remote );
 726
 727                                 osrfLogDebug( OSRF_LOG_MARK, "Setting remote address to %s", node->remote );
 728                                 osrfChatSendRaw( node, OSRF_CHAT_LOGIN_OK );
 729                                 if(osrfHashGet( node->parent->nodeHash, node->remote ) ) {
 730                                         osrfLogWarning( OSRF_LOG_MARK, "New node replaces existing node for remote id %s", node->remote);
 731                                         osrfHashRemove(node->parent->nodeHash, node->remote);
 732                                 }
 733                                 osrfHashSet( node->parent->nodeHash, node, node->remote );
 734                                 node->state = OSRF_CHAT_STATE_CONNECTED;
 735                         }
 736                 }
 737         }
 738 }
 739
 740
 741 void osrfChatHandleCharacter( void* blob, const xmlChar *ch, int len) {
 742         if(!(blob && ch && len)) return;
 743         osrfChatNode* node = (osrfChatNode*) blob;
 744
 745         /*
 746         osrfLogDebug( OSRF_LOG_MARK, "Char Handler: state %d, xmlstate %d, chardata %s",
 747                         node->state, node->xmlstate, (char*) ch );
 748                         */
 749
 750         if( node->state == OSRF_CHAT_STATE_CONNECTING ) {
 751                 if( node->xmlstate & OSRF_CHAT_STATE_INIQ ) {
 752
 753                         if( node->xmlstate & OSRF_CHAT_STATE_INUSERNAME ) {
 754                                 free(node->username);
 755                                 node->username = strndup((char*) ch, len);
 756                                 node->xmlstate &= ~OSRF_CHAT_STATE_INUSERNAME;
 757                         }
 758
 759                         if( node->xmlstate & OSRF_CHAT_STATE_INRESOURCE ) {
 760                                 free(node->resource);
 761                                 node->resource = strndup((char*) ch, len);
 762                                 node->xmlstate &= ~OSRF_CHAT_STATE_INRESOURCE;
 763                         }
 764                 }
 765
 766                 return;
 767         }
 768
 769         if( node->state == OSRF_CHAT_STATE_CONNECTED ) {
 770                 xmlNodePtr last = xmlGetLastChild(xmlDocGetRootElement(node->msgDoc));
 771                 xmlNodePtr txt = xmlNewTextLen(ch, len);
 772                 xmlAddChild(last, txt);
 773                 return;
 774         }
 775
 776         if( node->state == OSRF_CHAT_STATE_S2S_RESPONSE &&
 777                         (node->xmlstate & OSRF_CHAT_STATE_INS2SRESULT) ) {
 778
 779                 char* key = strndup((char*) ch, len);
 780                 osrfLogDebug( OSRF_LOG_MARK, "Got s2s key from %s : %s", node->remote, key );
 781                 char* e = osrfChatGenerateS2SKey(node->parent->secret, node->remote, node->authkey );
 782                 osrfLogInfo( OSRF_LOG_MARK, "\nReceived s2s key from server: %s\nKey should be: %s", key, e );
 783
 784                 if(eq(key, e)) {
 785                         char* msg = va_list_to_string(OSRF_CHAT_S2S_VERIFY_REQUEST,
 786                                         node->authkey, node->domain, node->remote, e );
 787                         osrfChatSendRaw(node, msg );
 788                         free(msg);
 789                         node->state = OSRF_CHAT_STATE_S2S_VERIFY_RESPONSE;
 790                         node->xmlstate = 0;
 791
 792                 } else {
 793                         osrfLogWarning( OSRF_LOG_MARK, "Server2Server keys do not match!");
 794                 }
 795
 796                 /* do the hash dance again */
 797         }
 798
 799         /* XXX free 'e' and 'key' ?? */
 800
 801 }
 802
 803
 804 void osrfChatParseError( void* blob, const char* msg, ... ) {
 805
 806         osrfChatXMLErrorOcurred = 1;
 807 }
 808
 809
 810
 811