src/libtransport/transport_session.c

   1 #include "transport_session.h"
   2
   3
   4
   5 // ---------------------------------------------------------------------------------
   6 // returns a built and allocated transport_session object.
   7 // This codes does no network activity, only memory initilization
   8 // ---------------------------------------------------------------------------------
   9 transport_session* init_transport(  const char* server,
  10         int port, const char* unix_path, void* user_data, int component ) {
  11
  12         /* create the session struct */
  13         transport_session* session =
  14                 (transport_session*) safe_malloc( sizeof(transport_session) );
  15
  16         session->user_data = user_data;
  17
  18         session->component = component;
  19
  20         /* initialize the data buffers */
  21         session->body_buffer                    = buffer_init( JABBER_BODY_BUFSIZE );
  22         session->subject_buffer         = buffer_init( JABBER_SUBJECT_BUFSIZE );
  23         session->thread_buffer          = buffer_init( JABBER_THREAD_BUFSIZE );
  24         session->from_buffer                    = buffer_init( JABBER_JID_BUFSIZE );
  25         session->status_buffer          = buffer_init( JABBER_STATUS_BUFSIZE );
  26         session->recipient_buffer       = buffer_init( JABBER_JID_BUFSIZE );
  27         session->message_error_type = buffer_init( JABBER_JID_BUFSIZE );
  28         session->session_id                     = buffer_init( 64 );
  29
  30         /* for OpenSRF extensions */
  31         session->router_to_buffer               = buffer_init( JABBER_JID_BUFSIZE );
  32         session->router_from_buffer     = buffer_init( JABBER_JID_BUFSIZE );
  33         session->osrf_xid_buffer        = buffer_init( JABBER_JID_BUFSIZE );
  34         session->router_class_buffer    = buffer_init( JABBER_JID_BUFSIZE );
  35         session->router_command_buffer  = buffer_init( JABBER_JID_BUFSIZE );
  36
  37
  38         if(     session->body_buffer            == NULL || session->subject_buffer       == NULL        ||
  39                         session->thread_buffer  == NULL || session->from_buffer          == NULL        ||
  40                         session->status_buffer  == NULL || session->recipient_buffer == NULL ||
  41                         session->router_to_buffer       == NULL || session->router_from_buffer   == NULL ||
  42                         session->router_class_buffer == NULL || session->router_command_buffer == NULL ||
  43                         session->session_id == NULL ) {
  44
  45                 osrfLogError(OSRF_LOG_MARK,  "init_transport(): buffer_init returned NULL" );
  46                 return 0;
  47         }
  48
  49
  50         /* initialize the jabber state machine */
  51         session->state_machine = (jabber_machine*) safe_malloc( sizeof(jabber_machine) );
  52
  53         /* initialize the sax push parser */
  54         session->parser_ctxt = xmlCreatePushParserCtxt(SAXHandler, session, "", 0, NULL);
  55
  56         /* initialize the transport_socket structure */
  57         session->sock_mgr = (socket_manager*) safe_malloc( sizeof(socket_manager) );
  58
  59         session->sock_mgr->data_received = &grab_incoming;
  60         session->sock_mgr->blob = session;
  61
  62         session->port = port;
  63         session->server = strdup(server);
  64         if(unix_path)
  65                 session->unix_path = strdup(unix_path);
  66         else session->unix_path = NULL;
  67
  68         session->sock_id = 0;
  69
  70         return session;
  71 }
  72
  73
  74
  75 /* XXX FREE THE BUFFERS */
  76 int session_free( transport_session* session ) {
  77         if( ! session ) { return 0; }
  78
  79         if(session->sock_mgr)
  80                 socket_manager_free(session->sock_mgr);
  81
  82         if( session->state_machine ) free( session->state_machine );
  83         if( session->parser_ctxt) {
  84                 xmlFreeDoc( session->parser_ctxt->myDoc );
  85                 xmlFreeParserCtxt(session->parser_ctxt);
  86         }
  87
  88         xmlCleanupCharEncodingHandlers();
  89         xmlDictCleanup();
  90         xmlCleanupParser();
  91
  92         buffer_free(session->body_buffer);
  93         buffer_free(session->subject_buffer);
  94         buffer_free(session->thread_buffer);
  95         buffer_free(session->from_buffer);
  96         buffer_free(session->recipient_buffer);
  97         buffer_free(session->status_buffer);
  98         buffer_free(session->message_error_type);
  99         buffer_free(session->router_to_buffer);
 100         buffer_free(session->router_from_buffer);
 101         buffer_free(session->osrf_xid_buffer);
 102         buffer_free(session->router_class_buffer);
 103         buffer_free(session->router_command_buffer);
 104         buffer_free(session->session_id);
 105
 106         free(session->server);
 107         free(session->unix_path);
 108
 109         free( session );
 110         return 1;
 111 }
 112
 113
 114 int session_wait( transport_session* session, int timeout ) {
 115         if( ! session || ! session->sock_mgr ) {
 116                 return 0;
 117         }
 118
 119         int ret =  socket_wait( session->sock_mgr, timeout, session->sock_id );
 120
 121         if( ret ) {
 122                 osrfLogDebug(OSRF_LOG_MARK, "socket_wait returned error code %d", ret);
 123                 session->state_machine->connected = 0;
 124         }
 125         return ret;
 126 }
 127
 128 int session_send_msg(
 129                 transport_session* session, transport_message* msg ) {
 130
 131         if( ! session ) { return -1; }
 132
 133         if( ! session->state_machine->connected ) {
 134                 osrfLogWarning(OSRF_LOG_MARK, "State machine is not connected in send_msg()");
 135                 return -1;
 136         }
 137
 138         message_prepare_xml( msg );
 139         //tcp_send( session->sock_obj, msg->msg_xml );
 140         return socket_send( session->sock_id, msg->msg_xml );
 141
 142 }
 143
 144
 145 /* connects to server and connects to jabber */
 146 int session_connect( transport_session* session,
 147                 const char* username, const char* password,
 148                 const char* resource, int connect_timeout, enum TRANSPORT_AUTH_TYPE auth_type ) {
 149
 150         int size1 = 0;
 151         int size2 = 0;
 152
 153         if( ! session ) {
 154                 osrfLogWarning(OSRF_LOG_MARK,  "session is null in connect" );
 155                 return 0;
 156         }
 157
 158
 159         //char* server = session->sock_obj->server;
 160         char* server = session->server;
 161
 162         if( ! session->sock_id ) {
 163
 164                 if(session->port > 0) {
 165                         if( (session->sock_id = socket_open_tcp_client(
 166                                 session->sock_mgr, session->port, session->server)) <= 0 )
 167                         return 0;
 168
 169                 } else if(session->unix_path != NULL) {
 170                         if( (session->sock_id = socket_open_unix_client(
 171                                 session->sock_mgr, session->unix_path)) <= 0 )
 172                         return 0;
 173                 }
 174                 else {
 175                         osrfLogWarning( OSRF_LOG_MARK, "Can't open session: no port or unix path" );
 176                         return 0;
 177                 }
 178         }
 179
 180         if( session->component ) {
 181
 182                 /* the first Jabber connect stanza */
 183                 char* our_hostname = getenv("HOSTNAME");
 184                 size1 = 150 + strlen( server );
 185                 char stanza1[ size1 ];
 186                 memset( stanza1, 0, size1 );
 187                 sprintf( stanza1,
 188                                 "<stream:stream version='1.0' xmlns:stream='http://etherx.jabber.org/streams' "
 189                                 "xmlns='jabber:component:accept' to='%s' from='%s' xml:lang='en'>",
 190                                 username, our_hostname );
 191
 192                 /* send the first stanze */
 193                 session->state_machine->connecting = CONNECTING_1;
 194
 195 //              if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 196                 if( socket_send( session->sock_id, stanza1 ) ) {
 197                         osrfLogWarning(OSRF_LOG_MARK, "error sending");
 198                         return 0;
 199                 }
 200
 201                 /* wait for reply */
 202                 //tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 203                 socket_wait(session->sock_mgr, connect_timeout, session->sock_id);
 204
 205                 /* server acknowledges our existence, now see if we can login */
 206                 if( session->state_machine->connecting == CONNECTING_2 ) {
 207
 208                         int ss = session->session_id->n_used + strlen(password) + 5;
 209                         char hashstuff[ss];
 210                         memset(hashstuff,0,ss);
 211                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 212
 213                         char* hash = shahash( hashstuff );
 214                         size2 = 100 + strlen( hash );
 215                         char stanza2[ size2 ];
 216                         memset( stanza2, 0, size2 );
 217                         sprintf( stanza2, "<handshake>%s</handshake>", hash );
 218
 219                         //if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 220                         if( socket_send( session->sock_id, stanza2 )  ) {
 221                                 osrfLogWarning(OSRF_LOG_MARK, "error sending");
 222                                 return 0;
 223                         }
 224                 }
 225
 226         } else { /* we're not a component */
 227
 228                 /* the first Jabber connect stanza */
 229                 size1 = 100 + strlen( server );
 230                 char stanza1[ size1 ];
 231                 memset( stanza1, 0, size1 );
 232                 sprintf( stanza1,
 233                                 "<stream:stream to='%s' xmlns='jabber:client' "
 234                                 "xmlns:stream='http://etherx.jabber.org/streams'>",
 235                         server );
 236
 237
 238                 /* send the first stanze */
 239                 session->state_machine->connecting = CONNECTING_1;
 240                 //if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 241                 if( socket_send( session->sock_id, stanza1 ) ) {
 242                         osrfLogWarning(OSRF_LOG_MARK, "error sending");
 243                         return 0;
 244                 }
 245
 246
 247                 /* wait for reply */
 248                 //tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 249                 socket_wait( session->sock_mgr, connect_timeout, session->sock_id ); /* make the timeout smarter XXX */
 250
 251                 if( auth_type == AUTH_PLAIN ) {
 252
 253                         /* the second jabber connect stanza including login info*/
 254                         size2 = 150 + strlen( username ) + strlen(password) + strlen(resource);
 255                         char stanza2[ size2 ];
 256                         memset( stanza2, 0, size2 );
 257
 258                         sprintf( stanza2,
 259                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'>"
 260                                         "<username>%s</username><password>%s</password><resource>%s</resource></query></iq>",
 261                                         username, password, resource );
 262
 263                         /* server acknowledges our existence, now see if we can login */
 264                         if( session->state_machine->connecting == CONNECTING_2 ) {
 265                                 //if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 266                                 if( socket_send( session->sock_id, stanza2 )  ) {
 267                                         osrfLogWarning(OSRF_LOG_MARK, "error sending");
 268                                         return 0;
 269                                 }
 270                         }
 271
 272                 } else if( auth_type == AUTH_DIGEST ) {
 273
 274                         int ss = session->session_id->n_used + strlen(password) + 5;
 275                         char hashstuff[ss];
 276                         memset(hashstuff,0,ss);
 277                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 278
 279                         char* hash = shahash( hashstuff );
 280
 281                         /* the second jabber connect stanza including login info*/
 282                         size2 = 150 + strlen( hash ) + strlen(password) + strlen(resource);
 283                         char stanza2[ size2 ];
 284                         memset( stanza2, 0, size2 );
 285
 286                         sprintf( stanza2,
 287                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'>"
 288                                         "<username>%s</username><digest>%s</digest><resource>%s</resource></query></iq>",
 289                                         username, hash, resource );
 290
 291                         /* server acknowledges our existence, now see if we can login */
 292                         if( session->state_machine->connecting == CONNECTING_2 ) {
 293                                 //if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 294                                 if( socket_send( session->sock_id, stanza2 )  ) {
 295                                         osrfLogWarning(OSRF_LOG_MARK, "error sending");
 296                                         return 0;
 297                                 }
 298                         }
 299
 300                 }
 301
 302         } // not component
 303
 304
 305         /* wait for reply */
 306         //tcp_wait( session->sock_obj, connect_timeout );
 307         socket_wait( session->sock_mgr, connect_timeout, session->sock_id );
 308
 309         if( session->state_machine->connected ) {
 310                 /* yar! */
 311                 return 1;
 312         }
 313
 314         return 0;
 315 }
 316
 317 // ---------------------------------------------------------------------------------
 318 // TCP data callback. Shove the data into the push parser.
 319 // ---------------------------------------------------------------------------------
 320 //void grab_incoming( void * session, char* data ) {
 321 void grab_incoming(void* blob, socket_manager* mgr, int sockid, char* data, int parent) {
 322         transport_session* ses = (transport_session*) blob;
 323         if( ! ses ) { return; }
 324         xmlParseChunk(ses->parser_ctxt, data, strlen(data), 0);
 325 }
 326
 327
 328 void startElementHandler(
 329         void *session, const xmlChar *name, const xmlChar **atts) {
 330
 331         transport_session* ses = (transport_session*) session;
 332         if( ! ses ) { return; }
 333
 334
 335         if( strcmp( name, "message" ) == 0 ) {
 336                 ses->state_machine->in_message = 1;
 337                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 338                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 339                 buffer_add( ses->router_from_buffer, get_xml_attr( atts, "router_from" ) );
 340                 buffer_add( ses->osrf_xid_buffer, get_xml_attr( atts, "osrf_xid" ) );
 341                 buffer_add( ses->router_to_buffer, get_xml_attr( atts, "router_to" ) );
 342                 buffer_add( ses->router_class_buffer, get_xml_attr( atts, "router_class" ) );
 343                 buffer_add( ses->router_command_buffer, get_xml_attr( atts, "router_command" ) );
 344                 char* broadcast = get_xml_attr( atts, "broadcast" );
 345                 if( broadcast )
 346                         ses->router_broadcast = atoi( broadcast );
 347
 348                 return;
 349         }
 350
 351         if( ses->state_machine->in_message ) {
 352
 353                 if( strcmp( name, "body" ) == 0 ) {
 354                         ses->state_machine->in_message_body = 1;
 355                         return;
 356                 }
 357
 358                 if( strcmp( name, "subject" ) == 0 ) {
 359                         ses->state_machine->in_subject = 1;
 360                         return;
 361                 }
 362
 363                 if( strcmp( name, "thread" ) == 0 ) {
 364                         ses->state_machine->in_thread = 1;
 365                         return;
 366                 }
 367
 368         }
 369
 370         if( strcmp( name, "presence" ) == 0 ) {
 371                 ses->state_machine->in_presence = 1;
 372                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 373                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 374                 return;
 375         }
 376
 377         if( strcmp( name, "status" ) == 0 ) {
 378                 ses->state_machine->in_status = 1;
 379                 return;
 380         }
 381
 382
 383         if( strcmp( name, "stream:error" ) == 0 ) {
 384                 ses->state_machine->in_error = 1;
 385                 ses->state_machine->connected = 0;
 386                 osrfLogWarning(  OSRF_LOG_MARK, "Received <stream:error> message from Jabber server" );
 387                 return;
 388         }
 389
 390
 391         /* first server response from a connect attempt */
 392         if( strcmp( name, "stream:stream" ) == 0 ) {
 393                 if( ses->state_machine->connecting == CONNECTING_1 ) {
 394                         ses->state_machine->connecting = CONNECTING_2;
 395                         buffer_add( ses->session_id, get_xml_attr(atts, "id") );
 396                 }
 397         }
 398
 399         if( strcmp( name, "handshake" ) == 0 ) {
 400                 ses->state_machine->connected = 1;
 401                 ses->state_machine->connecting = 0;
 402                 return;
 403         }
 404
 405
 406         if( strcmp( name, "error" ) == 0 ) {
 407                 ses->state_machine->in_message_error = 1;
 408                 buffer_add( ses->message_error_type, get_xml_attr( atts, "type" ) );
 409                 ses->message_error_code = atoi( get_xml_attr( atts, "code" ) );
 410                 osrfLogInfo( OSRF_LOG_MARK,  "Received <error> message with type %s and code %s",
 411                         get_xml_attr( atts, "type"), get_xml_attr( atts, "code") );
 412                 return;
 413         }
 414
 415         if( strcmp( name, "iq" ) == 0 ) {
 416                 ses->state_machine->in_iq = 1;
 417
 418                 if( strcmp( get_xml_attr(atts, "type"), "result") == 0
 419                                 && ses->state_machine->connecting == CONNECTING_2 ) {
 420                         ses->state_machine->connected = 1;
 421                         ses->state_machine->connecting = 0;
 422                         return;
 423                 }
 424
 425                 if( strcmp( get_xml_attr(atts, "type"), "error") == 0 ) {
 426                         osrfLogWarning( OSRF_LOG_MARK,  "Error connecting to jabber" );
 427                         return;
 428                 }
 429         }
 430 }
 431
 432 char* get_xml_attr( const xmlChar** atts, char* attr_name ) {
 433         int i;
 434         if (atts != NULL) {
 435                 for(i = 0;(atts[i] != NULL);i++) {
 436                         if( strcmp( atts[i++], attr_name ) == 0 ) {
 437                                 if( atts[i] != NULL ) {
 438                                         return (char*) atts[i];
 439                                 }
 440                         }
 441                 }
 442         }
 443         return NULL;
 444 }
 445
 446
 447 // ------------------------------------------------------------------
 448 // See which tags are ending
 449 // ------------------------------------------------------------------
 450 void endElementHandler( void *session, const xmlChar *name) {
 451         transport_session* ses = (transport_session*) session;
 452         if( ! ses ) { return; }
 453
 454         if( strcmp( name, "message" ) == 0 ) {
 455
 456
 457                 /* pass off the message info the callback */
 458                 if( ses->message_callback ) {
 459
 460                         /* here it's ok to pass in the raw buffers because
 461                                 message_init allocates new space for the chars
 462                                 passed in */
 463                         transport_message* msg =  message_init(
 464                                 ses->body_buffer->buf,
 465                                 ses->subject_buffer->buf,
 466                                 ses->thread_buffer->buf,
 467                                 ses->recipient_buffer->buf,
 468                                 ses->from_buffer->buf );
 469
 470                         message_set_router_info( msg,
 471                                 ses->router_from_buffer->buf,
 472                                 ses->router_to_buffer->buf,
 473                                 ses->router_class_buffer->buf,
 474                                 ses->router_command_buffer->buf,
 475                                 ses->router_broadcast );
 476
 477          message_set_osrf_xid( msg, ses->osrf_xid_buffer->buf );
 478
 479                         if( ses->message_error_type->n_used > 0 ) {
 480                                 set_msg_error( msg, ses->message_error_type->buf, ses->message_error_code );
 481                         }
 482
 483                         if( msg == NULL ) { return; }
 484                         ses->message_callback( ses->user_data, msg );
 485                 }
 486
 487                 ses->state_machine->in_message = 0;
 488                 reset_session_buffers( session );
 489                 return;
 490         }
 491
 492         if( strcmp( name, "body" ) == 0 ) {
 493                 ses->state_machine->in_message_body = 0;
 494                 return;
 495         }
 496
 497         if( strcmp( name, "subject" ) == 0 ) {
 498                 ses->state_machine->in_subject = 0;
 499                 return;
 500         }
 501
 502         if( strcmp( name, "thread" ) == 0 ) {
 503                 ses->state_machine->in_thread = 0;
 504                 return;
 505         }
 506
 507         if( strcmp( name, "iq" ) == 0 ) {
 508                 ses->state_machine->in_iq = 0;
 509                 if( ses->message_error_code > 0 ) {
 510                         osrfLogWarning( OSRF_LOG_MARK,  "Error in IQ packet: code %d",  ses->message_error_code );
 511                         osrfLogWarning( OSRF_LOG_MARK,  "Error 401 means not authorized" );
 512                 }
 513                 reset_session_buffers( session );
 514                 return;
 515         }
 516
 517         if( strcmp( name, "presence" ) == 0 ) {
 518                 ses->state_machine->in_presence = 0;
 519                 /*
 520                 if( ses->presence_callback ) {
 521                         // call the callback with the status, etc.
 522                 }
 523                 */
 524                 reset_session_buffers( session );
 525                 return;
 526         }
 527
 528         if( strcmp( name, "status" ) == 0 ) {
 529                 ses->state_machine->in_status = 0;
 530                 return;
 531         }
 532
 533         if( strcmp( name, "error" ) == 0 ) {
 534                 ses->state_machine->in_message_error = 0;
 535                 return;
 536         }
 537
 538         if( strcmp( name, "error:error" ) == 0 ) {
 539                 ses->state_machine->in_error = 0;
 540                 return;
 541         }
 542 }
 543
 544 int reset_session_buffers( transport_session* ses ) {
 545         buffer_reset( ses->body_buffer );
 546         buffer_reset( ses->subject_buffer );
 547         buffer_reset( ses->thread_buffer );
 548         buffer_reset( ses->from_buffer );
 549         buffer_reset( ses->recipient_buffer );
 550         buffer_reset( ses->router_from_buffer );
 551         buffer_reset( ses->osrf_xid_buffer );
 552         buffer_reset( ses->router_to_buffer );
 553         buffer_reset( ses->router_class_buffer );
 554         buffer_reset( ses->router_command_buffer );
 555         buffer_reset( ses->message_error_type );
 556         buffer_reset( ses->session_id );
 557
 558         return 1;
 559 }
 560
 561 // ------------------------------------------------------------------
 562 // takes data out of the body of the message and pushes it into
 563 // the appropriate buffer
 564 // ------------------------------------------------------------------
 565 void characterHandler(
 566                 void *session, const xmlChar *ch, int len) {
 567
 568         char data[len+1];
 569         memset( data, 0, len+1 );
 570         strncpy( data, (char*) ch, len );
 571         data[len] = 0;
 572
 573         //printf( "Handling characters: %s\n", data );
 574         transport_session* ses = (transport_session*) session;
 575         if( ! ses ) { return; }
 576
 577         /* set the various message parts */
 578         if( ses->state_machine->in_message ) {
 579
 580                 if( ses->state_machine->in_message_body ) {
 581                         buffer_add( ses->body_buffer, data );
 582                 }
 583
 584                 if( ses->state_machine->in_subject ) {
 585                         buffer_add( ses->subject_buffer, data );
 586                 }
 587
 588                 if( ses->state_machine->in_thread ) {
 589                         buffer_add( ses->thread_buffer, data );
 590                 }
 591         }
 592
 593         /* set the presence status */
 594         if( ses->state_machine->in_presence && ses->state_machine->in_status ) {
 595                 buffer_add( ses->status_buffer, data );
 596         }
 597
 598         if( ses->state_machine->in_error ) {
 599                 /* for now... */
 600                 osrfLogWarning( OSRF_LOG_MARK,  "ERROR Xml fragment: %s\n", ch );
 601         }
 602
 603 }
 604
 605 /* XXX change to warning handlers */
 606 void  parseWarningHandler( void *session, const char* msg, ... ) {
 607
 608         va_list args;
 609         va_start(args, msg);
 610         fprintf(stdout, "transport_session XML WARNING");
 611         vfprintf(stdout, msg, args);
 612         va_end(args);
 613         fprintf(stderr, "XML WARNING: %s\n", msg );
 614 }
 615
 616 void  parseErrorHandler( void *session, const char* msg, ... ){
 617
 618         va_list args;
 619         va_start(args, msg);
 620         fprintf(stdout, "transport_session XML ERROR");
 621         vfprintf(stdout, msg, args);
 622         va_end(args);
 623         fprintf(stderr, "XML ERROR: %s\n", msg );
 624
 625 }
 626
 627 int session_disconnect( transport_session* session ) {
 628         if( session == NULL ) { return 0; }
 629         //tcp_send( session->sock_obj, "</stream:stream>");
 630         socket_send(session->sock_id, "</stream:stream>");
 631         socket_disconnect(session->sock_mgr, session->sock_id);
 632         return 0;
 633         //return tcp_disconnect( session->sock_obj );
 634 }
 635