src/libopensrf/transport_session.c

   1 #include <opensrf/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                 snprintf( stanza1, sizeof(stanza1),
 187                                 "<stream:stream version='1.0' xmlns:stream='http://etherx.jabber.org/streams' "
 188                                 "xmlns='jabber:component:accept' to='%s' from='%s' xml:lang='en'>",
 189                                 username, our_hostname );
 190
 191                 /* send the first stanze */
 192                 session->state_machine->connecting = CONNECTING_1;
 193
 194 //              if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 195                 if( socket_send( session->sock_id, stanza1 ) ) {
 196                         osrfLogWarning(OSRF_LOG_MARK, "error sending");
 197                         return 0;
 198                 }
 199
 200                 /* wait for reply */
 201                 //tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 202                 socket_wait(session->sock_mgr, connect_timeout, session->sock_id);
 203
 204                 /* server acknowledges our existence, now see if we can login */
 205                 if( session->state_machine->connecting == CONNECTING_2 ) {
 206
 207                         int ss = session->session_id->n_used + strlen(password) + 5;
 208                         char hashstuff[ss];
 209                         snprintf( hashstuff, sizeof(hashstuff), "%s%s", session->session_id->buf, password );
 210
 211                         char* hash = shahash( hashstuff );
 212                         size2 = 100 + strlen( hash );
 213                         char stanza2[ size2 ];
 214                         snprintf( stanza2, sizeof(stanza2), "<handshake>%s</handshake>", hash );
 215
 216                         //if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 217                         if( socket_send( session->sock_id, stanza2 )  ) {
 218                                 osrfLogWarning(OSRF_LOG_MARK, "error sending");
 219                                 return 0;
 220                         }
 221                 }
 222
 223         } else { /* we're not a component */
 224
 225                 /* the first Jabber connect stanza */
 226                 size1 = 100 + strlen( server );
 227                 char stanza1[ size1 ];
 228                 snprintf( stanza1, sizeof(stanza1),
 229                                 "<stream:stream to='%s' xmlns='jabber:client' "
 230                                 "xmlns:stream='http://etherx.jabber.org/streams'>",
 231                         server );
 232
 233
 234                 /* send the first stanze */
 235                 session->state_machine->connecting = CONNECTING_1;
 236                 //if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 237                 if( socket_send( session->sock_id, stanza1 ) ) {
 238                         osrfLogWarning(OSRF_LOG_MARK, "error sending");
 239                         return 0;
 240                 }
 241
 242
 243                 /* wait for reply */
 244                 //tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 245                 socket_wait( session->sock_mgr, connect_timeout, session->sock_id ); /* make the timeout smarter XXX */
 246
 247                 if( auth_type == AUTH_PLAIN ) {
 248
 249                         /* the second jabber connect stanza including login info*/
 250                         size2 = 150 + strlen( username ) + strlen(password) + strlen(resource);
 251                         char stanza2[ size2 ];
 252                         snprintf( stanza2, sizeof(stanza2),
 253                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'>"
 254                                         "<username>%s</username><password>%s</password><resource>%s</resource></query></iq>",
 255                                         username, password, resource );
 256
 257                         /* server acknowledges our existence, now see if we can login */
 258                         if( session->state_machine->connecting == CONNECTING_2 ) {
 259                                 //if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 260                                 if( socket_send( session->sock_id, stanza2 )  ) {
 261                                         osrfLogWarning(OSRF_LOG_MARK, "error sending");
 262                                         return 0;
 263                                 }
 264                         }
 265
 266                 } else if( auth_type == AUTH_DIGEST ) {
 267
 268                         int ss = session->session_id->n_used + strlen(password) + 5;
 269                         char hashstuff[ss];
 270                         snprintf( hashstuff, sizeof(hashstuff), "%s%s", session->session_id->buf, password );
 271
 272                         char* hash = shahash( hashstuff );
 273
 274                         /* the second jabber connect stanza including login info*/
 275                         size2 = 150 + strlen( hash ) + strlen(password) + strlen(resource);
 276                         char stanza2[ size2 ];
 277                         snprintf( stanza2, sizeof(stanza2),
 278                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'>"
 279                                         "<username>%s</username><digest>%s</digest><resource>%s</resource></query></iq>",
 280                                         username, hash, resource );
 281
 282                         /* server acknowledges our existence, now see if we can login */
 283                         if( session->state_machine->connecting == CONNECTING_2 ) {
 284                                 //if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 285                                 if( socket_send( session->sock_id, stanza2 )  ) {
 286                                         osrfLogWarning(OSRF_LOG_MARK, "error sending");
 287                                         return 0;
 288                                 }
 289                         }
 290
 291                 }
 292
 293         } // not component
 294
 295
 296         /* wait for reply */
 297         //tcp_wait( session->sock_obj, connect_timeout );
 298         socket_wait( session->sock_mgr, connect_timeout, session->sock_id );
 299
 300         if( session->state_machine->connected ) {
 301                 /* yar! */
 302                 return 1;
 303         }
 304
 305         return 0;
 306 }
 307
 308 // ---------------------------------------------------------------------------------
 309 // TCP data callback. Shove the data into the push parser.
 310 // ---------------------------------------------------------------------------------
 311 //void grab_incoming( void * session, char* data ) {
 312 void grab_incoming(void* blob, socket_manager* mgr, int sockid, char* data, int parent) {
 313         transport_session* ses = (transport_session*) blob;
 314         if( ! ses ) { return; }
 315         xmlParseChunk(ses->parser_ctxt, data, strlen(data), 0);
 316 }
 317
 318
 319 void startElementHandler(
 320         void *session, const xmlChar *name, const xmlChar **atts) {
 321
 322         transport_session* ses = (transport_session*) session;
 323         if( ! ses ) { return; }
 324
 325
 326         if( strcmp( (char*) name, "message" ) == 0 ) {
 327                 ses->state_machine->in_message = 1;
 328                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 329                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 330                 buffer_add( ses->router_from_buffer, get_xml_attr( atts, "router_from" ) );
 331                 buffer_add( ses->osrf_xid_buffer, get_xml_attr( atts, "osrf_xid" ) );
 332                 buffer_add( ses->router_to_buffer, get_xml_attr( atts, "router_to" ) );
 333                 buffer_add( ses->router_class_buffer, get_xml_attr( atts, "router_class" ) );
 334                 buffer_add( ses->router_command_buffer, get_xml_attr( atts, "router_command" ) );
 335                 char* broadcast = get_xml_attr( atts, "broadcast" );
 336                 if( broadcast )
 337                         ses->router_broadcast = atoi( broadcast );
 338
 339                 return;
 340         }
 341
 342         if( ses->state_machine->in_message ) {
 343
 344                 if( strcmp( (char*) name, "body" ) == 0 ) {
 345                         ses->state_machine->in_message_body = 1;
 346                         return;
 347                 }
 348
 349                 if( strcmp( (char*) name, "subject" ) == 0 ) {
 350                         ses->state_machine->in_subject = 1;
 351                         return;
 352                 }
 353
 354                 if( strcmp( (char*) name, "thread" ) == 0 ) {
 355                         ses->state_machine->in_thread = 1;
 356                         return;
 357                 }
 358
 359         }
 360
 361         if( strcmp( (char*) name, "presence" ) == 0 ) {
 362                 ses->state_machine->in_presence = 1;
 363                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 364                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 365                 return;
 366         }
 367
 368         if( strcmp( (char*) name, "status" ) == 0 ) {
 369                 ses->state_machine->in_status = 1;
 370                 return;
 371         }
 372
 373
 374         if( strcmp( (char*) name, "stream:error" ) == 0 ) {
 375                 ses->state_machine->in_error = 1;
 376                 ses->state_machine->connected = 0;
 377                 osrfLogWarning(  OSRF_LOG_MARK, "Received <stream:error> message from Jabber server" );
 378                 return;
 379         }
 380
 381
 382         /* first server response from a connect attempt */
 383         if( strcmp( (char*) name, "stream:stream" ) == 0 ) {
 384                 if( ses->state_machine->connecting == CONNECTING_1 ) {
 385                         ses->state_machine->connecting = CONNECTING_2;
 386                         buffer_add( ses->session_id, get_xml_attr(atts, "id") );
 387                 }
 388         }
 389
 390         if( strcmp( (char*) name, "handshake" ) == 0 ) {
 391                 ses->state_machine->connected = 1;
 392                 ses->state_machine->connecting = 0;
 393                 return;
 394         }
 395
 396
 397         if( strcmp( (char*) name, "error" ) == 0 ) {
 398                 ses->state_machine->in_message_error = 1;
 399                 buffer_add( ses->message_error_type, get_xml_attr( atts, "type" ) );
 400                 ses->message_error_code = atoi( get_xml_attr( atts, "code" ) );
 401                 osrfLogInfo( OSRF_LOG_MARK,  "Received <error> message with type %s and code %s",
 402                         get_xml_attr( atts, "type"), get_xml_attr( atts, "code") );
 403                 return;
 404         }
 405
 406         if( strcmp( (char*) name, "iq" ) == 0 ) {
 407                 ses->state_machine->in_iq = 1;
 408
 409                 if( strcmp( get_xml_attr(atts, "type"), "result") == 0
 410                                 && ses->state_machine->connecting == CONNECTING_2 ) {
 411                         ses->state_machine->connected = 1;
 412                         ses->state_machine->connecting = 0;
 413                         return;
 414                 }
 415
 416                 if( strcmp( get_xml_attr(atts, "type"), "error") == 0 ) {
 417                         osrfLogWarning( OSRF_LOG_MARK,  "Error connecting to jabber" );
 418                         return;
 419                 }
 420         }
 421 }
 422
 423 char* get_xml_attr( const xmlChar** atts, char* attr_name ) {
 424         int i;
 425         if (atts != NULL) {
 426                 for(i = 0;(atts[i] != NULL);i++) {
 427                         if( strcmp( (char*) atts[i++], attr_name ) == 0 ) {
 428                                 if( atts[i] != NULL ) {
 429                                         return (char*) atts[i];
 430                                 }
 431                         }
 432                 }
 433         }
 434         return NULL;
 435 }
 436
 437
 438 // ------------------------------------------------------------------
 439 // See which tags are ending
 440 // ------------------------------------------------------------------
 441 void endElementHandler( void *session, const xmlChar *name) {
 442         transport_session* ses = (transport_session*) session;
 443         if( ! ses ) { return; }
 444
 445         if( strcmp( (char*) name, "message" ) == 0 ) {
 446
 447
 448                 /* pass off the message info the callback */
 449                 if( ses->message_callback ) {
 450
 451                         /* here it's ok to pass in the raw buffers because
 452                                 message_init allocates new space for the chars
 453                                 passed in */
 454                         transport_message* msg =  message_init(
 455                                 ses->body_buffer->buf,
 456                                 ses->subject_buffer->buf,
 457                                 ses->thread_buffer->buf,
 458                                 ses->recipient_buffer->buf,
 459                                 ses->from_buffer->buf );
 460
 461                         message_set_router_info( msg,
 462                                 ses->router_from_buffer->buf,
 463                                 ses->router_to_buffer->buf,
 464                                 ses->router_class_buffer->buf,
 465                                 ses->router_command_buffer->buf,
 466                                 ses->router_broadcast );
 467
 468          message_set_osrf_xid( msg, ses->osrf_xid_buffer->buf );
 469
 470                         if( ses->message_error_type->n_used > 0 ) {
 471                                 set_msg_error( msg, ses->message_error_type->buf, ses->message_error_code );
 472                         }
 473
 474                         if( msg == NULL ) { return; }
 475                         ses->message_callback( ses->user_data, msg );
 476                 }
 477
 478                 ses->state_machine->in_message = 0;
 479                 reset_session_buffers( session );
 480                 return;
 481         }
 482
 483         if( strcmp( (char*) name, "body" ) == 0 ) {
 484                 ses->state_machine->in_message_body = 0;
 485                 return;
 486         }
 487
 488         if( strcmp( (char*) name, "subject" ) == 0 ) {
 489                 ses->state_machine->in_subject = 0;
 490                 return;
 491         }
 492
 493         if( strcmp( (char*) name, "thread" ) == 0 ) {
 494                 ses->state_machine->in_thread = 0;
 495                 return;
 496         }
 497
 498         if( strcmp( (char*) name, "iq" ) == 0 ) {
 499                 ses->state_machine->in_iq = 0;
 500                 if( ses->message_error_code > 0 ) {
 501                         osrfLogWarning( OSRF_LOG_MARK,  "Error in IQ packet: code %d",  ses->message_error_code );
 502                         osrfLogWarning( OSRF_LOG_MARK,  "Error 401 means not authorized" );
 503                 }
 504                 reset_session_buffers( session );
 505                 return;
 506         }
 507
 508         if( strcmp( (char*) name, "presence" ) == 0 ) {
 509                 ses->state_machine->in_presence = 0;
 510                 /*
 511                 if( ses->presence_callback ) {
 512                         // call the callback with the status, etc.
 513                 }
 514                 */
 515                 reset_session_buffers( session );
 516                 return;
 517         }
 518
 519         if( strcmp( (char*) name, "status" ) == 0 ) {
 520                 ses->state_machine->in_status = 0;
 521                 return;
 522         }
 523
 524         if( strcmp( (char*) name, "error" ) == 0 ) {
 525                 ses->state_machine->in_message_error = 0;
 526                 return;
 527         }
 528
 529         if( strcmp( (char*) name, "error:error" ) == 0 ) {
 530                 ses->state_machine->in_error = 0;
 531                 return;
 532         }
 533 }
 534
 535 int reset_session_buffers( transport_session* ses ) {
 536         buffer_reset( ses->body_buffer );
 537         buffer_reset( ses->subject_buffer );
 538         buffer_reset( ses->thread_buffer );
 539         buffer_reset( ses->from_buffer );
 540         buffer_reset( ses->recipient_buffer );
 541         buffer_reset( ses->router_from_buffer );
 542         buffer_reset( ses->osrf_xid_buffer );
 543         buffer_reset( ses->router_to_buffer );
 544         buffer_reset( ses->router_class_buffer );
 545         buffer_reset( ses->router_command_buffer );
 546         buffer_reset( ses->message_error_type );
 547         buffer_reset( ses->session_id );
 548
 549         return 1;
 550 }
 551
 552 // ------------------------------------------------------------------
 553 // takes data out of the body of the message and pushes it into
 554 // the appropriate buffer
 555 // ------------------------------------------------------------------
 556 void characterHandler(
 557                 void *session, const xmlChar *ch, int len) {
 558
 559         char data[len+1];
 560         strncpy( data, (char*) ch, len );
 561         data[len] = 0;
 562
 563         //printf( "Handling characters: %s\n", data );
 564         transport_session* ses = (transport_session*) session;
 565         if( ! ses ) { return; }
 566
 567         /* set the various message parts */
 568         if( ses->state_machine->in_message ) {
 569
 570                 if( ses->state_machine->in_message_body ) {
 571                         buffer_add( ses->body_buffer, data );
 572                 }
 573
 574                 if( ses->state_machine->in_subject ) {
 575                         buffer_add( ses->subject_buffer, data );
 576                 }
 577
 578                 if( ses->state_machine->in_thread ) {
 579                         buffer_add( ses->thread_buffer, data );
 580                 }
 581         }
 582
 583         /* set the presence status */
 584         if( ses->state_machine->in_presence && ses->state_machine->in_status ) {
 585                 buffer_add( ses->status_buffer, data );
 586         }
 587
 588         if( ses->state_machine->in_error ) {
 589                 /* for now... */
 590                 osrfLogWarning( OSRF_LOG_MARK,  "ERROR XML fragment: %s\n", ch );
 591         }
 592
 593 }
 594
 595 /* XXX change to warning handlers */
 596 void  parseWarningHandler( void *session, const char* msg, ... ) {
 597
 598         va_list args;
 599         va_start(args, msg);
 600         fprintf(stdout, "transport_session XML WARNING");
 601         vfprintf(stdout, msg, args);
 602         va_end(args);
 603         fprintf(stderr, "XML WARNING: %s\n", msg );
 604 }
 605
 606 void  parseErrorHandler( void *session, const char* msg, ... ){
 607
 608         va_list args;
 609         va_start(args, msg);
 610         fprintf(stdout, "transport_session XML ERROR");
 611         vfprintf(stdout, msg, args);
 612         va_end(args);
 613         fprintf(stderr, "XML ERROR: %s\n", msg );
 614
 615 }
 616
 617 int session_disconnect( transport_session* session ) {
 618         if( session == NULL ) { return 0; }
 619         //tcp_send( session->sock_obj, "</stream:stream>");
 620         socket_send(session->sock_id, "</stream:stream>");
 621         socket_disconnect(session->sock_mgr, session->sock_id);
 622         return 0;
 623         //return tcp_disconnect( session->sock_obj );
 624 }
 625