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
  23 /* This is used by code in osrfChatPushData, but that code is
  24    currently commented out.  Uncomment the next line if needed. */
  25 //static int osrfChatClientSentDisconnect = 0;
  26
  27 /* shorter version of strcmp */
  28 static int eq(const char* a, const char* b) { return (a && b && !strcmp(a,b)); }
  29 //#define eq(a,b) ((a && b && !strcmp(a,b)) ? 1 : 0)
  30
  31 /* gnarly debug function */
  32 static void chatdbg( osrfChatServer* server ) {
  33
  34         if(!server) return;
  35         return; /* heavy logging, should only be used in heavy debug mode */
  36
  37         growing_buffer* buf = buffer_init(256);
  38
  39         buffer_add(buf, "---------------------------------------------------------------------\n");
  40
  41         buffer_fadd(buf,
  42                 "ChopChop Debug:\n"
  43                 "Connections:           %lu\n"
  44                 "Named nodes in hash:   %lu\n"
  45                 "Domain:                %s\n"
  46                 "Port:                  %d\n"
  47                 "S2S Port:              %d\n"
  48                 "-------------------------------------------------------\n",
  49                 osrfListGetCount(server->nodeList), osrfHashGetCount(server->nodeHash),
  50                 server->domain, server->port, server->s2sport );
  51
  52         osrfListIterator* itr = osrfNewListIterator(server->nodeList);
  53         osrfChatNode* node;
  54
  55         while( (node = osrfListIteratorNext(itr)) ) {
  56
  57                 buffer_fadd( buf,
  58                         "sockid:    %d\n"
  59                         "Remote:    %s\n"
  60                         "State:     %d\n"
  61                         "XMLState:  %d\n"
  62                         "In Parse:  %d\n"
  63                         "to:        %s\n"
  64                         "Resource:  %s\n"
  65                         "Username:  %s\n"
  66                         "Domain:    %s\n"
  67                         "Authkey:   %s\n"
  68                         "type:          %d\n"
  69                         "-------------------------------------------------------\n",
  70                         node->sockid, node->remote, node->state, node->xmlstate, node->inparse,
  71                         node->to, node->resource, node->username, node->domain, node->authkey, node->type );
  72         }
  73
  74         osrfLogDebug( OSRF_LOG_MARK, "DEBUG:\n%s", buf->buf );
  75         buffer_free(buf);
  76         osrfListIteratorFree(itr);
  77 }
  78
  79 osrfChatServer* osrfNewChatServer( char* domain, char* secret, int s2sport ) {
  80         if(!(domain && secret)) return NULL;
  81
  82         osrfChatServer* server = safe_malloc(sizeof(osrfChatServer));
  83
  84         server->nodeHash        = osrfNewHash();
  85         server->nodeList        = osrfNewList();
  86         server->deadNodes = osrfNewList();
  87         server->nodeList->freeItem = &osrfChatNodeFree;
  88         server->domain          = strdup(domain);
  89         server->secret      = strdup(secret);
  90         server->s2sport = s2sport;
  91         server->port        = 0;
  92
  93         // Build socket manager
  94         server->mgr = safe_malloc(sizeof(socket_manager));
  95         server->mgr->data_received = &osrfChatHandleData;
  96         server->mgr->socket = NULL;
  97         server->mgr->blob = server;
  98         server->mgr->on_socket_closed = &osrfChatSocketClosed;
  99
 100         return server;
 101 }
 102
 103 void osrfChatCleanupClients( osrfChatServer* server ) {
 104         if(!server) return;
 105         osrfListFree(server->deadNodes);
 106         server->deadNodes = osrfNewList();
 107 }
 108
 109
 110
 111 osrfChatNode* osrfNewChatNode( int sockid, char* domain ) {
 112         if(sockid < 1 || !domain) return NULL;
 113         osrfChatNode* node      = safe_malloc(sizeof(osrfChatNode));
 114         node->sockid            = 0;
 115         node->remote            = NULL;
 116         node->state                             = OSRF_CHAT_STATE_NONE;
 117         node->xmlstate          = 0;
 118         node->inparse           = 0;
 119         node->msgs                              = NULL; /* only s2s nodes cache messages */
 120         node->parserCtx         = xmlCreatePushParserCtxt(osrfChatSaxHandler, node, "", 0, NULL);
 121         node->msgDoc                    = xmlNewDoc(BAD_CAST "1.0");
 122         node->domain = strdup(domain);
 123         xmlKeepBlanksDefault(0);
 124         node->authkey                   = NULL;
 125         node->username                  = NULL;
 126         node->resource                  = NULL;
 127         node->to                                        = NULL;
 128         node->type = 0;
 129         node->parent            = NULL;
 130         return node;
 131 }
 132
 133
 134 osrfChatNode* osrfNewChatS2SNode( char* domain, char* remote ) {
 135         if(!(domain && remote)) return NULL;
 136         osrfChatNode* n = osrfNewChatNode( 1, domain );
 137         n->state                = OSRF_CHAT_STATE_S2S_CHALLENGE;
 138         n->sockid       = -1;
 139         n->remote       = strdup(remote);
 140         n->msgs         = osrfNewList();
 141         n->msgs->freeItem = &osrfChatS2SMessageFree;
 142         n->type = 1;
 143         return n;
 144 }
 145
 146 void osrfChatS2SMessageFree(void* n) { free(n); }
 147
 148 void osrfChatNodeFree( void* node ) {
 149         if(!node) return;
 150         osrfChatNode* n = (osrfChatNode*) node;
 151
 152         /* we can't free messages that are mid-parse because the
 153                 we can't free the parser context */
 154         if(n->inparse) {
 155                 n->inparse = 0;
 156                 osrfListPush(n->parent->deadNodes, n);
 157                 return;
 158         }
 159
 160         free(n->remote);
 161         free(n->to);
 162         free(n->username);
 163         free(n->resource);
 164         free(n->domain);
 165         free(n->authkey);
 166
 167         osrfListFree(n->msgs);
 168
 169         if(n->parserCtx) {
 170                 xmlFreeDoc(n->parserCtx->myDoc);
 171                 xmlFreeParserCtxt(n->parserCtx);
 172         }
 173
 174         xmlFreeDoc(n->msgDoc);
 175         free(n);
 176 }
 177
 178
 179
 180 int osrfChatServerConnect( osrfChatServer* cs,  int port, int s2sport, char* listenAddr ) {
 181         if(!(cs && port && listenAddr)) return -1;
 182         cs->port = port;
 183         cs->s2sport = s2sport;
 184         if( socket_open_tcp_server(cs->mgr, port, listenAddr ) < 0 )
 185                 return -1;
 186         if( socket_open_tcp_server(cs->mgr, s2sport, listenAddr ) < 0 )
 187                 return -1;
 188         return 0;
 189 }
 190
 191
 192 int osrfChatServerWait( osrfChatServer* server ) {
 193         if(!server) return -1;
 194         while(1) {
 195                 if(socket_wait_all(server->mgr, -1) < 0)
 196                         osrfLogWarning( OSRF_LOG_MARK,  "jserver_wait(): socket_wait_all() returned error");
 197         }
 198         return -1;
 199 }
 200
 201
 202 void osrfChatServerFree(osrfChatServer* server ) {
 203         if(!server) return;
 204         osrfHashFree(server->nodeHash);
 205         osrfListFree(server->nodeList);
 206         osrfListFree(server->deadNodes);
 207         socket_manager_free(server->mgr);
 208         free(server->domain);
 209         free(server->secret);
 210
 211         free(server);
 212 }
 213
 214
 215 void osrfChatHandleData( void* cs,
 216         socket_manager* mgr, int sockid, char* data, int parent_id ) {
 217
 218         if(!(cs && mgr && sockid && data)) return;
 219
 220         osrfChatServer* server = (osrfChatServer*) cs;
 221
 222         osrfChatNode* node = osrfListGetIndex( server->nodeList, sockid );
 223
 224         if(node)
 225                 osrfLogDebug( OSRF_LOG_MARK, "Found node for sockid %d with state %d", sockid, node->state);
 226
 227         if(!node) {
 228                 osrfLogDebug( OSRF_LOG_MARK, "Adding new connection for sockid %d", sockid );
 229                 node = osrfChatAddNode( server, sockid );
 230         }
 231
 232         if(node) {
 233                 if( (osrfChatPushData( server, node, data ) == -1) ) {
 234                         osrfLogError( OSRF_LOG_MARK,
 235                                         "Node at socket %d with remote address %s and destination %s, "
 236                                         "received bad XML [%s], disconnecting...", sockid, node->remote, node->to, data );
 237                         osrfChatSendRaw(  node, OSRF_CHAT_PARSE_ERROR );
 238                         osrfChatRemoveNode( server, node );
 239                 }
 240         }
 241
 242         osrfChatCleanupClients(server); /* clean up old dead clients */
 243 }
 244
 245
 246 void osrfChatSocketClosed( void* blob, int sockid ) {
 247         if(!blob) return;
 248         osrfChatServer* server = (osrfChatServer*) blob;
 249         osrfChatNode* node = osrfListGetIndex(server->nodeList, sockid);
 250         osrfChatRemoveNode( server, node );
 251 }
 252
 253 osrfChatNode* osrfChatAddNode( osrfChatServer* server, int sockid ) {
 254         if(!(server && sockid)) return NULL;
 255         osrfChatNode* node = osrfNewChatNode(sockid, server->domain);
 256         node->parent = server;
 257         node->sockid = sockid;
 258         osrfListSet( server->nodeList, node, sockid );
 259         return node;
 260 }
 261
 262 void osrfChatRemoveNode( osrfChatServer* server, osrfChatNode* node ) {
 263         if(!(server && node)) return;
 264         socket_disconnect(server->mgr, node->sockid);
 265         if(node->remote)
 266                 osrfHashRemove( server->nodeHash, node->remote );
 267         osrfListRemove( server->nodeList, node->sockid ); /* this will free it */
 268 }
 269
 270 int osrfChatSendRaw( osrfChatNode* node, char* msgXML ) {
 271         if(!(node && msgXML)) return -1;
 272         /* wait at most 3 second for this client to take our data */
 273         return socket_send_timeout( node->sockid, msgXML, 3000000 );
 274 }
 275
 276 void osrfChatNodeFinish( osrfChatServer* server, osrfChatNode* node ) {
 277         if(!(server && node)) return;
 278         osrfChatSendRaw( node, "</stream:stream>");
 279         osrfChatRemoveNode( server, node );
 280 }
 281
 282
 283 int osrfChatSend( osrfChatServer* cs, osrfChatNode* node, char* toAddr, char* fromAddr, char* msgXML ) {
 284         if(!(cs && node && toAddr && msgXML)) return -1;
 285
 286         int l = strlen(toAddr);
 287         char dombuf[l];
 288         memset(dombuf, 0, sizeof(dombuf));
 289         jid_get_domain( toAddr, dombuf, l );
 290
 291         if( eq( dombuf, cs->domain ) ) { /* this is to a user we host */
 292
 293                 osrfLogInfo( OSRF_LOG_MARK, "Sending message on local connection\nfrom: %s\nto: %s", fromAddr, toAddr );
 294                 osrfChatNode* tonode = osrfHashGet(cs->nodeHash, toAddr);
 295                 if(tonode) {
 296
 297                         /* if we can't send to the recipient (recipient is gone or too busy,
 298                          * we drop the recipient and inform the sender that the recipient
 299                          * is no more */
 300                         if( osrfChatSendRaw( tonode, msgXML ) < 0 ) {
 301
 302                                 osrfChatRemoveNode( cs, tonode );
 303                                 char* xml = va_list_to_string( OSRF_CHAT_NO_RECIPIENT, toAddr, fromAddr );
 304
 305                                 osrfLogError( OSRF_LOG_MARK, "Node failed to function. "
 306                                                 "Responding to caller with error: %s", toAddr);
 307
 308
 309                                 if( osrfChatSendRaw( node, xml ) < 0 ) {
 310                                         osrfLogError(OSRF_LOG_MARK, "Sending node is now gone..removing");
 311                                         osrfChatRemoveNode( cs, node );
 312                                 }
 313                                 free(xml);
 314                         }
 315
 316                 } else {
 317
 318                         /* send an error message saying we don't have this connection */
 319                         osrfLogInfo( OSRF_LOG_MARK, "We have no connection for %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                 }
 325
 326         } else {
 327
 328                 osrfChatNode* tonode = osrfHashGet(cs->nodeHash, dombuf);
 329                 if(tonode) {
 330                         if( tonode->state == OSRF_CHAT_STATE_CONNECTED ) {
 331                                 osrfLogDebug( OSRF_LOG_MARK, "Routing message to server %s", dombuf);
 332
 333                                 if( osrfChatSendRaw( tonode, msgXML ) < 0 ) {
 334                                         osrfLogError( OSRF_LOG_MARK, "Node failed to function: %s", toAddr);
 335                                         char* xml = va_list_to_string( OSRF_CHAT_NO_RECIPIENT, toAddr, fromAddr );
 336                                         if( osrfChatSendRaw( node, xml ) < 0 )
 337                                                 osrfChatRemoveNode( cs, node );
 338                                         free(xml);
 339                                         osrfChatRemoveNode( cs, tonode );
 340                                 }
 341
 342                         } else {
 343                                 osrfLogInfo( OSRF_LOG_MARK, "Received s2s message and we're still trying to connect...caching");
 344                                 osrfListPush( tonode->msgs, strdup(msgXML) );
 345                         }
 346
 347                 } else {
 348
 349                         if( osrfChatInitS2S( cs, dombuf, toAddr, msgXML ) != 0 ) {
 350                                 osrfLogWarning( OSRF_LOG_MARK, "We are unable to connect to remote server %s for recipient %s", dombuf, toAddr);
 351                                 char* xml = va_list_to_string( OSRF_CHAT_NO_RECIPIENT, toAddr, fromAddr );
 352                                 osrfChatSendRaw( node, xml );
 353                                 free(xml);
 354                         }
 355                 }
 356         }
 357
 358         return 0;
 359 }
 360
 361
 362 /*
 363 void osrfChatCacheS2SMessage( char* toAddr, char* msgXML, osrfChatNode* snode ) {
 364         if(!(toAddr && msgXML)) return;
 365         osrfChatS2SMessage* msg = safe_malloc(sizeof(osrfChatS2SMessage));
 366         msg->toAddr = strdup(toAddr);
 367         msg->msgXML = strdup(msgXML);
 368         osrfLogInfo( OSRF_LOG_MARK, "Pushing client message onto s2s queue waiting for connect... ");
 369         osrfListPush( snode->msgs, msgXML );
 370 }
 371 */
 372
 373
 374 int osrfChatInitS2S( osrfChatServer* cs, char* remote, char* toAddr, char* msgXML ) {
 375         if(!(cs && remote && toAddr && msgXML)) return -1;
 376
 377         osrfLogInfo( OSRF_LOG_MARK, "Initing server2server connection to domain %s", remote );
 378         osrfChatNode* snode = osrfNewChatS2SNode( cs->domain, remote );
 379         snode->parent = cs;
 380
 381         /* try to connect to the remote site */
 382         snode->sockid = socket_open_tcp_client(cs->mgr, cs->s2sport, remote);
 383         if(snode->sockid < 1) {
 384                 osrfLogWarning( OSRF_LOG_MARK, "Unable to connect to remote server at %s", remote );
 385                 osrfChatNodeFree( snode );
 386                 return -1;
 387         }
 388
 389         /* store the message we were supposed to deliver until we're fully connected */
 390         //osrfChatCacheS2SMessage( toAddr, msgXML, snode );
 391         osrfListPush( snode->msgs, strdup(msgXML) );
 392         osrfHashSet(cs->nodeHash, snode, remote );
 393         osrfListSet(cs->nodeList, snode, snode->sockid );
 394
 395         /* send the initial s2s request */
 396         osrfChatSendRaw( snode, OSRF_CHAT_S2S_INIT );
 397
 398         osrfLogDebug( OSRF_LOG_MARK, "Added new s2s node...");
 399         chatdbg(cs);
 400
 401         return 0;
 402 }
 403
 404
 405 /* commence SAX handling code */
 406
 407 int osrfChatPushData( osrfChatServer* server, osrfChatNode* node, char* data ) {
 408         if(!(node && data)) return -1;
 409
 410         chatdbg(server);
 411
 412         osrfLogDebug( OSRF_LOG_MARK, "pushing data into xml parser for node %d with state %d:\n%s",
 413                                                  node->sockid, node->state, data);
 414         node->inparse = 1;
 415         xmlParseChunk(node->parserCtx, data, strlen(data), 0);
 416         node->inparse = 0;
 417
 418         if(osrfChatXMLErrorOcurred) {
 419                 osrfChatXMLErrorOcurred = 0;
 420                 return -1;
 421         }
 422
 423         /* we can't do cleanup of the XML handlers while in the middle of a
 424                 data push, so set flags in the data push and doe the cleanup here */
 425         /*
 426         if(osrfChatClientSentDisconnect) {
 427                 osrfChatClientSentDisconnect  = 0;
 428                 osrfChatNodeFinish( server, node );
 429         }
 430         */
 431
 432         return 0;
 433 }
 434
 435
 436 void osrfChatStartStream( void* blob ) {
 437         osrfLogDebug( OSRF_LOG_MARK, "Starting new client stream...");
 438 }
 439
 440
 441 void osrfChatStartElement( void* blob, const xmlChar *name, const xmlChar **atts ) {
 442         if(!(blob && name)) return;
 443         osrfChatNode* node = (osrfChatNode*) blob;
 444
 445         int status = -1;
 446         char* nm = (char*) name;
 447
 448         osrfLogDebug( OSRF_LOG_MARK, "Starting element %s with namespace %s and node state %d",
 449                                                  nm, xmlSaxAttr(atts, "xmlns"), node->state );
 450
 451         switch( node->state ) {
 452
 453                 case OSRF_CHAT_STATE_NONE:
 454                         status = osrfChatHandleNewConnection( node, nm, atts );
 455                         osrfLogDebug( OSRF_LOG_MARK, "After NewConnection we have state %d", node->state);
 456                         break;
 457
 458                 case OSRF_CHAT_STATE_CONNECTING:
 459                         status = osrfChatHandleConnecting( node, nm, atts );
 460                         break;
 461
 462                 case OSRF_CHAT_STATE_CONNECTED:
 463                         status = osrfChatHandleConnected( node, nm, atts );
 464                         break;
 465
 466                 case OSRF_CHAT_STATE_S2S_CHALLENGE:
 467                         status = osrfChatHandleS2SChallenge( node, nm, atts );
 468                         break;
 469
 470                 case OSRF_CHAT_STATE_S2S_RESPONSE: /* server waiting for client response to challenge */
 471                         if(eq(nm, "db:result")) {
 472                                 char* remote = xmlSaxAttr(atts, "from");
 473                                 if(remote) {
 474                                         if( node->remote) free( node->remote );
 475                                         node->remote = strdup(remote); /* copy off the client's id */
 476                                 }
 477                                 status = 0;
 478                                 node->xmlstate |= OSRF_CHAT_STATE_INS2SRESULT;
 479                         } else status = -1;
 480                         break;
 481
 482                 case OSRF_CHAT_STATE_S2S_VERIFY:        /* client : waiting for server verify message */
 483                         if(eq(nm, "db:verify")) {
 484                                 char* id = xmlSaxAttr( atts, "id" );
 485                                 if(id) {
 486                                         char* xml = va_list_to_string( OSRF_CHAT_S2S_VERIFY_RESPONSE,
 487                                                         node->remote, node->domain, id );
 488                                         osrfChatSendRaw( node, xml );
 489                                         free(xml);
 490                                         node->state = OSRF_CHAT_STATE_S2S_VERIFY_FINAL;
 491                                         status = 0;
 492                                 }
 493                         }
 494                         break;
 495
 496                 case OSRF_CHAT_STATE_S2S_VERIFY_RESPONSE:       /* server waiting for client verify response */
 497                 case OSRF_CHAT_STATE_S2S_VERIFY_FINAL: /* client waitig for final verify */
 498                         status = osrfChatHandleS2SConnected( node, nm, atts );
 499                         break;
 500
 501         }
 502
 503         if(status != 0)
 504                 osrfChatParseError( node, "We don't know how to handle the XML data received" );
 505 }
 506
 507 #define CHAT_CHECK_VARS(x,y,z) if(!(x && y)) return -1; if(z) osrfLogDebug( OSRF_LOG_MARK, z);
 508
 509
 510
 511 int osrfChatHandleS2SConnected( osrfChatNode* node, const char* name, const xmlChar**atts ) {
 512         CHAT_CHECK_VARS(node, name, "osrfChatHandleS2SConnected" );
 513
 514         int status = -1;
 515
 516         if(eq(name,"db:verify")) { /* server receives verify from client */
 517                 char* xml = va_list_to_string(OSRF_CHAT_S2S_VERIFY_FINAL, node->domain, node->remote );
 518                 osrfChatSendRaw(node, xml );
 519                 free(xml);
 520                 status = 0;
 521         }
 522
 523         if(eq(name, "db:result")) {
 524                 /* send all the messages that we have queued for this server */
 525                 node->state = OSRF_CHAT_STATE_CONNECTED;
 526                 osrfListIterator* itr = osrfNewListIterator(node->msgs);
 527
 528                 char* xml;
 529                 while( (xml = (char*) osrfListIteratorNext(itr)) ) {
 530                         xmlDocPtr doc = xmlParseMemory(xml, strlen(xml));
 531                         if(doc) {
 532                                 char* from = (char*) xmlGetProp(xmlDocGetRootElement(doc), BAD_CAST "from");
 533                                 char* to = (char*) xmlGetProp(xmlDocGetRootElement(doc), BAD_CAST "to");
 534                                 osrfChatSend( node->parent, node, to, from, xml );
 535                                 osrfLogDebug( OSRF_LOG_MARK, "Sending cached message from %s to %s", from, to);
 536                                 xmlFree(to); xmlFree(from);
 537                                 xmlFreeDoc(doc);
 538                         }
 539                 }
 540
 541                 osrfListIteratorFree(itr);
 542                 osrfListFree(node->msgs);
 543                 node->msgs = NULL;
 544                 status = 0;
 545         }
 546
 547         if(status == 0) {
 548                 osrfLogInfo( OSRF_LOG_MARK, "Successfully made S2S connection to %s", node->remote );
 549                 node->state = OSRF_CHAT_STATE_CONNECTED;
 550                 node->xmlstate = 0;
 551         }
 552
 553         return status;
 554 }
 555
 556
 557 /** check the namespace of the stream message to see if it's a server or client connection */
 558 int osrfChatHandleNewConnection( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 559         CHAT_CHECK_VARS(node, name, "osrfChatHandleNewConnection()");
 560
 561         if(!eq(name, "stream:stream")) return -1;
 562
 563         if( node->authkey ) free( node->authkey );
 564         node->authkey = osrfChatMkAuthKey();
 565         char* ns = xmlSaxAttr(atts, "xmlns");
 566         if(!ns) return -1;
 567
 568         if(eq(ns, "jabber:client")) { /* client connection */
 569
 570                 char* domain = xmlSaxAttr( atts, "to" );
 571                 if(!domain) return -1;
 572
 573                 if(!eq(domain, node->domain)) {
 574                         osrfLogWarning( OSRF_LOG_MARK,
 575                                 "Client attempting to connect to invalid domain %s. Our domain is %s", domain, node->domain);
 576                         return -1;
 577                 }
 578
 579                 char* buf = va_list_to_string( OSRF_CHAT_START_STREAM, domain, node->authkey );
 580                 node->state = OSRF_CHAT_STATE_CONNECTING;
 581
 582                 osrfLogDebug( OSRF_LOG_MARK, "Server node %d setting state to OSRF_CHAT_STATE_CONNECTING[%d]",
 583                                                          node->sockid, node->state );
 584
 585                 osrfLogDebug( OSRF_LOG_MARK, "Server responding to connect message with\n%s\n", buf );
 586                 osrfChatSendRaw( node, buf );
 587                 free(buf);
 588                 return 0;
 589         }
 590
 591         /* server to server init */
 592         if(eq(ns, "jabber:server")) { /* client connection */
 593                 osrfLogInfo( OSRF_LOG_MARK, "We received a new server 2 server connection, generating auth key...");
 594                 char* xml = va_list_to_string( OSRF_CHAT_S2S_CHALLENGE, node->authkey );
 595                 osrfChatSendRaw( node, xml );
 596                 free(xml);
 597                 node->state = OSRF_CHAT_STATE_S2S_RESPONSE; /* the next message should be the response */
 598                 node->type = 1;
 599                 return 0;
 600         }
 601
 602         return -1;
 603 }
 604
 605
 606
 607 char* osrfChatMkAuthKey() {
 608         char hostname[HOST_NAME_MAX + 1] = "";
 609         gethostname(hostname, sizeof(hostname) );
 610         hostname[HOST_NAME_MAX] = '\0';
 611         char keybuf[112];
 612         snprintf(keybuf, sizeof(keybuf), "%d%ld%s", (int) time(NULL), (long) getpid(), hostname);
 613         return strdup(shahash(keybuf));
 614 }
 615
 616 int osrfChatHandleConnecting( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 617         CHAT_CHECK_VARS(node, name, "osrfChatHandleConnecting()");
 618         osrfLogDebug( OSRF_LOG_MARK, "Handling connect node %s", name );
 619
 620         if(eq(name, "iq")) node->xmlstate |= OSRF_CHAT_STATE_INIQ;
 621         else if(eq(name,"username")) node->xmlstate |= OSRF_CHAT_STATE_INUSERNAME;
 622         else if(eq(name,"resource")) node->xmlstate |= OSRF_CHAT_STATE_INRESOURCE;
 623         return 0;
 624 }
 625
 626 int osrfChatHandleConnected( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 627         CHAT_CHECK_VARS(node, name, "osrfChatHandleConnected()");
 628
 629         if(eq(name,"message")) {
 630
 631                 /* drop the old message and start with a new one */
 632                 xmlNodePtr root = xmlNewNode(NULL, BAD_CAST name);
 633                 xmlAddAttrs(root, atts);
 634                 xmlNodePtr oldRoot = xmlDocSetRootElement(node->msgDoc, root);
 635                 free(node->to);
 636
 637                 char* to = xmlSaxAttr(atts, "to");
 638                 if(!to) to = "";
 639
 640                 node->to = strdup(to);
 641                 if(oldRoot) xmlFreeNode(oldRoot);
 642                 node->xmlstate = OSRF_CHAT_STATE_INMESSAGE;
 643
 644         } else {
 645
 646                 /* all non "message" nodes are simply added to the message */
 647                 xmlNodePtr nodep = xmlNewNode(NULL, BAD_CAST name);
 648                 xmlAddAttrs(nodep, atts);
 649                 xmlAddChild(xmlDocGetRootElement(node->msgDoc), nodep);
 650         }
 651
 652         return 0;
 653 }
 654
 655 /* takes s2s secret, hashdomain, and the s2s auth token */
 656 static char* osrfChatGenerateS2SKey( char* secret, char* hashdomain, char* authtoken ) {
 657         if(!(secret && hashdomain && authtoken)) return NULL;
 658         osrfLogInfo( OSRF_LOG_MARK, "Generating s2s key with auth token: %s", authtoken );
 659         char* a = shahash(secret);
 660         osrfLogDebug( OSRF_LOG_MARK, "S2S secret hash: %s", a);
 661         char* b = va_list_to_string("%s%s", a, hashdomain);
 662         char* c = shahash(b);
 663         osrfLogDebug( OSRF_LOG_MARK, "S2S intermediate hash: %s", c);
 664         char* d = va_list_to_string("%s%s", c, authtoken);
 665         char* e = strdup(shahash(d));
 666         free(b); free(d);
 667         return e;
 668 }
 669
 670 int osrfChatHandleS2SChallenge( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 671         CHAT_CHECK_VARS(node, name, "osrfChatHandleS2SChallenge()");
 672
 673 /* here we respond to the stream challenge */
 674         if(eq(name, "stream:stream")) {
 675                 char* id = xmlSaxAttr(atts, "id");
 676                 if(id) {
 677                         /* we use our domain in the s2s challenge hash */
 678                         char* d = osrfChatGenerateS2SKey(node->parent->secret, node->domain, id );
 679                         char* e = va_list_to_string(OSRF_CHAT_S2S_RESPONSE, node->remote, node->domain, d );
 680                         osrfLogInfo( OSRF_LOG_MARK, "Answering s2s challenge with key:  %s", e );
 681                         osrfChatSendRaw( node, e );
 682                         free(d); free(e);
 683                         node->state = OSRF_CHAT_STATE_S2S_VERIFY;
 684                         return 0;
 685                 }
 686         }
 687
 688         return -1;
 689 }
 690
 691 /*
 692 int osrfChatHandleS2SResponse( osrfChatNode* node, const char* name, const xmlChar** atts ) {
 693         CHAT_CHECK_VARS(node, name, "osrfChatHandleS2SResponse()");
 694
 695         if(eq(name, "db:result")) {
 696                 node->xmlstate |= OSRF_CHAT_STATE_INS2SRESULT;
 697                 return 0;
 698         }
 699
 700         return -1;
 701 }
 702 */
 703
 704
 705
 706 void osrfChatEndElement( void* blob, const xmlChar* name ) {
 707         if(!(blob && name)) return;
 708         osrfChatNode* node = (osrfChatNode*) blob;
 709
 710         char* nm = (char*) name;
 711
 712         if(eq(nm,"stream:stream")) {
 713                 osrfChatNodeFinish( node->parent, node );
 714                 return;
 715         }
 716
 717         if( node->state == OSRF_CHAT_STATE_CONNECTED ) {
 718                 if(eq(nm, "message")) {
 719
 720                         xmlNodePtr msg = xmlDocGetRootElement(node->msgDoc);
 721                         if(msg && node->type == 0)
 722                                 xmlSetProp(msg, BAD_CAST "from", BAD_CAST node->remote );
 723                         char* string = xmlDocToString(node->msgDoc, 0 );
 724
 725                         char* from = (char*) xmlGetProp(msg, BAD_CAST "from");
 726                         osrfLogDebug( OSRF_LOG_MARK,  "Routing message to %s\n%s\n", node->to, from, string );
 727                         osrfChatSend( node->parent, node, node->to, from, string );
 728                         xmlFree(from);
 729                         free(string);
 730                 }
 731         }
 732
 733         if( node->state == OSRF_CHAT_STATE_CONNECTING ) {
 734                 if( node->xmlstate & OSRF_CHAT_STATE_INIQ ) {
 735
 736                         if(eq(nm, "iq")) {
 737                                 node->xmlstate &= ~OSRF_CHAT_STATE_INIQ;
 738                                 if( node->remote ) free( node->remote );
 739                                 node->remote = va_list_to_string(
 740                                                 "%s@%s/%s", node->username, node->domain, node->resource );
 741
 742                                 osrfLogInfo( OSRF_LOG_MARK, "%s successfully logged in", node->remote );
 743
 744                                 osrfLogDebug( OSRF_LOG_MARK, "Setting remote address to %s", node->remote );
 745                                 osrfChatSendRaw( node, OSRF_CHAT_LOGIN_OK );
 746                                 if(osrfHashGet( node->parent->nodeHash, node->remote ) ) {
 747                                         osrfLogWarning( OSRF_LOG_MARK, "New node replaces existing node for remote id %s", node->remote);
 748                                         osrfHashRemove(node->parent->nodeHash, node->remote);
 749                                 }
 750                                 osrfHashSet( node->parent->nodeHash, node, node->remote );
 751                                 node->state = OSRF_CHAT_STATE_CONNECTED;
 752                         }
 753                 }
 754         }
 755 }
 756
 757
 758 void osrfChatHandleCharacter( void* blob, const xmlChar *ch, int len) {
 759         if(!(blob && ch && len)) return;
 760         osrfChatNode* node = (osrfChatNode*) blob;
 761
 762         /*
 763         osrfLogDebug( OSRF_LOG_MARK, "Char Handler: state %d, xmlstate %d, chardata %s",
 764                         node->state, node->xmlstate, (char*) ch );
 765                         */
 766
 767         if( node->state == OSRF_CHAT_STATE_CONNECTING ) {
 768                 if( node->xmlstate & OSRF_CHAT_STATE_INIQ ) {
 769
 770                         if( node->xmlstate & OSRF_CHAT_STATE_INUSERNAME ) {
 771                                 free(node->username);
 772                                 node->username = strndup((char*) ch, len);
 773                                 node->xmlstate &= ~OSRF_CHAT_STATE_INUSERNAME;
 774                         }
 775
 776                         if( node->xmlstate & OSRF_CHAT_STATE_INRESOURCE ) {
 777                                 free(node->resource);
 778                                 node->resource = strndup((char*) ch, len);
 779                                 node->xmlstate &= ~OSRF_CHAT_STATE_INRESOURCE;
 780                         }
 781                 }
 782
 783                 return;
 784         }
 785
 786         if( node->state == OSRF_CHAT_STATE_CONNECTED ) {
 787                 xmlNodePtr last = xmlGetLastChild(xmlDocGetRootElement(node->msgDoc));
 788                 xmlNodePtr txt = xmlNewTextLen(ch, len);
 789                 xmlAddChild(last, txt);
 790                 return;
 791         }
 792
 793         if( node->state == OSRF_CHAT_STATE_S2S_RESPONSE &&
 794                         (node->xmlstate & OSRF_CHAT_STATE_INS2SRESULT) ) {
 795
 796                 char* key = strndup((char*) ch, len);
 797                 osrfLogDebug( OSRF_LOG_MARK, "Got s2s key from %s : %s", node->remote, key );
 798                 char* e = osrfChatGenerateS2SKey(node->parent->secret, node->remote, node->authkey );
 799                 osrfLogInfo( OSRF_LOG_MARK, "\nReceived s2s key from server: %s\nKey should be: %s", key, e );
 800
 801                 if(eq(key, e)) {
 802                         char* msg = va_list_to_string(OSRF_CHAT_S2S_VERIFY_REQUEST,
 803                                         node->authkey, node->domain, node->remote, e );
 804                         osrfChatSendRaw(node, msg );
 805                         free(msg);
 806                         node->state = OSRF_CHAT_STATE_S2S_VERIFY_RESPONSE;
 807                         node->xmlstate = 0;
 808
 809                 } else {
 810                         osrfLogWarning( OSRF_LOG_MARK, "Server2Server keys do not match!");
 811                 }
 812
 813                 free( e );
 814                 free( key );
 815
 816                 /* do the hash dance again */
 817         }
 818 }
 819
 820
 821 void osrfChatParseError( void* blob, const char* msg, ... ) {
 822
 823         osrfChatXMLErrorOcurred = 1;
 824 }
 825
 826
 827
 828