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