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