src/libtransport/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(  char* server, int port, void* user_data, int component ) {
  10
  11         /* create the session struct */
  12         transport_session* session =
  13                 (transport_session*) safe_malloc( sizeof(transport_session) );
  14
  15         session->user_data = user_data;
  16
  17         session->component = component;
  18
  19         /* initialize the data buffers */
  20         session->body_buffer                    = buffer_init( JABBER_BODY_BUFSIZE );
  21         session->subject_buffer         = buffer_init( JABBER_SUBJECT_BUFSIZE );
  22         session->thread_buffer          = buffer_init( JABBER_THREAD_BUFSIZE );
  23         session->from_buffer                    = buffer_init( JABBER_JID_BUFSIZE );
  24         session->status_buffer          = buffer_init( JABBER_STATUS_BUFSIZE );
  25         session->recipient_buffer       = buffer_init( JABBER_JID_BUFSIZE );
  26         session->message_error_type = buffer_init( JABBER_JID_BUFSIZE );
  27         session->session_id                     = buffer_init( 64 );
  28
  29         /* for OpenSRF extensions */
  30         session->router_to_buffer               = buffer_init( JABBER_JID_BUFSIZE );
  31         session->router_from_buffer     = buffer_init( JABBER_JID_BUFSIZE );
  32         session->router_class_buffer    = buffer_init( JABBER_JID_BUFSIZE );
  33         session->router_command_buffer  = buffer_init( JABBER_JID_BUFSIZE );
  34
  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                 fatal_handler( "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_obj = (transport_socket*) safe_malloc( sizeof(transport_socket) );
  57
  58         //int serv_size = strlen( server );
  59         session->sock_obj->server = server;
  60         session->sock_obj->port = port;
  61         session->sock_obj->data_received_callback = &grab_incoming;
  62
  63         /* this will be handed back to us in callbacks */
  64         session->sock_obj->user_data = session;
  65
  66         return session;
  67 }
  68
  69 /* XXX FREE THE BUFFERS */
  70 int session_free( transport_session* session ) {
  71         if( ! session ) { return 0; }
  72
  73         if( session->sock_obj )
  74                 free( session->sock_obj );
  75
  76         if( session->state_machine ) free( session->state_machine );
  77         if( session->parser_ctxt) {
  78                 xmlCleanupCharEncodingHandlers();
  79                 xmlFreeDoc( session->parser_ctxt->myDoc );
  80                 xmlFreeParserCtxt(session->parser_ctxt);
  81         }
  82         xmlCleanupParser();
  83
  84         buffer_free(session->body_buffer);
  85         buffer_free(session->subject_buffer);
  86         buffer_free(session->thread_buffer);
  87         buffer_free(session->from_buffer);
  88         buffer_free(session->recipient_buffer);
  89         buffer_free(session->status_buffer);
  90         buffer_free(session->message_error_type);
  91         buffer_free(session->router_to_buffer);
  92         buffer_free(session->router_from_buffer);
  93         buffer_free(session->router_class_buffer);
  94         buffer_free(session->router_command_buffer);
  95         buffer_free(session->session_id);
  96
  97
  98         free( session );
  99         return 1;
 100 }
 101
 102
 103 int session_wait( transport_session* session, int timeout ) {
 104         if( ! session || ! session->sock_obj ) {
 105                 return 0;
 106         }
 107         int ret =  tcp_wait( session->sock_obj, timeout );
 108         if( ! ret ) {
 109                 session->state_machine->connected = 0;
 110         }
 111         return ret;
 112 }
 113
 114 int session_send_msg(
 115                 transport_session* session, transport_message* msg ) {
 116
 117         if( ! session ) { return 0; }
 118
 119         if( ! session->state_machine->connected ) {
 120                 warning_handler("State machine is not connected in send_msg()");
 121                 return 0;
 122         }
 123
 124         message_prepare_xml( msg );
 125         tcp_send( session->sock_obj, msg->msg_xml );
 126
 127         return 1;
 128
 129 }
 130
 131
 132 /* connects to server and connects to jabber */
 133 int session_connect( transport_session* session,
 134                 const char* username, const char* password,
 135                 const char* resource, int connect_timeout, enum TRANSPORT_AUTH_TYPE auth_type ) {
 136
 137         int size1 = 0;
 138         int size2 = 0;
 139
 140         if( ! session ) {
 141                 warning_handler( "session is null in connect" );
 142                 return 0;
 143         }
 144
 145
 146         /*
 147         session->state_machine->connected =
 148                 tcp_connected( session->sock_obj );
 149
 150         if( session->state_machine->connected ) {
 151                 return 1;
 152         }
 153         */
 154
 155
 156         char* server = session->sock_obj->server;
 157
 158         if( ! session->sock_obj ) {
 159                 return 0;
 160         }
 161
 162         if( ! session->sock_obj->connected ) {
 163                 if( ! tcp_connect( session->sock_obj ))
 164                         return 0;
 165         }
 166
 167         if( session->component ) {
 168
 169                 /* the first Jabber connect stanza */
 170                 char* our_hostname = getenv("HOSTNAME");
 171                 size1 = 150 + strlen( server );
 172                 char stanza1[ size1 ];
 173                 memset( stanza1, 0, size1 );
 174                 sprintf( stanza1,
 175                                 "<stream:stream version='1.0' xmlns:stream='http://etherx.jabber.org/streams' xmlns='jabber:component:accept' to='%s' from='%s' xml:lang='en'>",
 176                                 username, our_hostname );
 177
 178                 /* send the first stanze */
 179                 session->state_machine->connecting = CONNECTING_1;
 180                 if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 181                         warning_handler("error sending");
 182                         return 0;
 183                 }
 184
 185                 /* wait for reply */
 186                 tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 187
 188                 /* server acknowledges our existence, now see if we can login */
 189                 if( session->state_machine->connecting == CONNECTING_2 ) {
 190
 191                         int ss = session->session_id->n_used + strlen(password) + 5;
 192                         char hashstuff[ss];
 193                         memset(hashstuff,0,ss);
 194                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 195
 196                         char* hash = shahash( hashstuff );
 197                         size2 = 100 + strlen( hash );
 198                         char stanza2[ size2 ];
 199                         memset( stanza2, 0, size2 );
 200                         sprintf( stanza2, "<handshake>%s</handshake>", hash );
 201
 202                         if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 203                                 warning_handler("error sending");
 204                                 return 0;
 205                         }
 206                 }
 207
 208         } else { /* we're not a component */
 209
 210                 /* the first Jabber connect stanza */
 211                 size1 = 100 + strlen( server );
 212                 char stanza1[ size1 ];
 213                 memset( stanza1, 0, size1 );
 214                 sprintf( stanza1,
 215                                 "<stream:stream to='%s' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams'>",
 216                         server );
 217
 218
 219                 /* send the first stanze */
 220                 session->state_machine->connecting = CONNECTING_1;
 221                 if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 222                         warning_handler("error sending");
 223                         return 0;
 224                 }
 225
 226
 227                 /* wait for reply */
 228                 tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 229
 230                 if( auth_type == AUTH_PLAIN ) {
 231
 232                         /* the second jabber connect stanza including login info*/
 233                         size2 = 150 + strlen( username ) + strlen(password) + strlen(resource);
 234                         char stanza2[ size2 ];
 235                         memset( stanza2, 0, size2 );
 236
 237                         sprintf( stanza2,
 238                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'><username>%s</username><password>%s</password><resource>%s</resource></query></iq>",
 239                                         username, password, resource );
 240
 241
 242                 /*
 243                 <iq type='set' id='auth2'>
 244                         <query xmlns='jabber:iq:auth'>
 245                                 <username>bill</username>
 246                            <digest>48fc78be9ec8f86d8ce1c39c320c97c21d62334d</digest>
 247                                 <resource>globe</resource>
 248                         </query>
 249                 </iq>
 250                 */
 251
 252
 253                         /* server acknowledges our existence, now see if we can login */
 254                         if( session->state_machine->connecting == CONNECTING_2 ) {
 255                                 if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 256                                         warning_handler("error sending");
 257                                         return 0;
 258                                 }
 259                         }
 260
 261                 } else if( auth_type == AUTH_DIGEST ) {
 262
 263                         int ss = session->session_id->n_used + strlen(password) + 5;
 264                         char hashstuff[ss];
 265                         memset(hashstuff,0,ss);
 266                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 267
 268                         char* hash = shahash( hashstuff );
 269
 270                         /* the second jabber connect stanza including login info*/
 271                         size2 = 150 + strlen( hash ) + strlen(password) + strlen(resource);
 272                         char stanza2[ size2 ];
 273                         memset( stanza2, 0, size2 );
 274
 275                         sprintf( stanza2,
 276                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'><username>%s</username><digest>%s</digest><resource>%s</resource></query></iq>",
 277                                         username, hash, resource );
 278
 279
 280                 /*
 281                 <iq type='set' id='auth2'>
 282                         <query xmlns='jabber:iq:auth'>
 283                                 <username>bill</username>
 284                            <digest>48fc78be9ec8f86d8ce1c39c320c97c21d62334d</digest>
 285                                 <resource>globe</resource>
 286                         </query>
 287                 </iq>
 288                 */
 289
 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                                         warning_handler("error sending");
 295                                         return 0;
 296                                 }
 297                         }
 298
 299                 }
 300
 301         } // not component
 302
 303
 304         /* wait for reply */
 305         tcp_wait( session->sock_obj, connect_timeout );
 306
 307         if( session->state_machine->connected ) {
 308                 /* yar! */
 309                 return 1;
 310         }
 311
 312         return 0;
 313 }
 314
 315 // ---------------------------------------------------------------------------------
 316 // TCP data callback. Shove the data into the push parser.
 317 // ---------------------------------------------------------------------------------
 318 void grab_incoming( void * session, char* data ) {
 319         transport_session* ses = (transport_session*) session;
 320         if( ! ses ) { return; }
 321         xmlParseChunk(ses->parser_ctxt, data, strlen(data), 0);
 322 }
 323
 324
 325 void startElementHandler(
 326         void *session, const xmlChar *name, const xmlChar **atts) {
 327
 328         transport_session* ses = (transport_session*) session;
 329         if( ! ses ) { return; }
 330
 331
 332         if( strcmp( name, "message" ) == 0 ) {
 333                 ses->state_machine->in_message = 1;
 334                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 335                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 336                 buffer_add( ses->router_from_buffer, get_xml_attr( atts, "router_from" ) );
 337                 buffer_add( ses->router_to_buffer, get_xml_attr( atts, "router_to" ) );
 338                 buffer_add( ses->router_class_buffer, get_xml_attr( atts, "router_class" ) );
 339                 buffer_add( ses->router_command_buffer, get_xml_attr( atts, "router_command" ) );
 340                 char* broadcast = get_xml_attr( atts, "broadcast" );
 341                 if( broadcast )
 342                         ses->router_broadcast = atoi( broadcast );
 343
 344                 return;
 345         }
 346
 347         if( ses->state_machine->in_message ) {
 348
 349                 if( strcmp( name, "body" ) == 0 ) {
 350                         ses->state_machine->in_message_body = 1;
 351                         return;
 352                 }
 353
 354                 if( strcmp( name, "subject" ) == 0 ) {
 355                         ses->state_machine->in_subject = 1;
 356                         return;
 357                 }
 358
 359                 if( strcmp( name, "thread" ) == 0 ) {
 360                         ses->state_machine->in_thread = 1;
 361                         return;
 362                 }
 363
 364         }
 365
 366         if( strcmp( name, "presence" ) == 0 ) {
 367                 ses->state_machine->in_presence = 1;
 368                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 369                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 370                 return;
 371         }
 372
 373         if( strcmp( name, "status" ) == 0 ) {
 374                 ses->state_machine->in_status = 1;
 375                 return;
 376         }
 377
 378
 379         if( strcmp( name, "stream:error" ) == 0 ) {
 380                 ses->state_machine->in_error = 1;
 381                 warning_handler( "Received <stream:error> message from Jabber server" );
 382                 return;
 383         }
 384
 385
 386         /* first server response from a connect attempt */
 387         if( strcmp( name, "stream:stream" ) == 0 ) {
 388                 if( ses->state_machine->connecting == CONNECTING_1 ) {
 389                         ses->state_machine->connecting = CONNECTING_2;
 390                         buffer_add( ses->session_id, get_xml_attr(atts, "id") );
 391                 }
 392         }
 393
 394         if( strcmp( name, "handshake" ) == 0 ) {
 395                 ses->state_machine->connected = 1;
 396                 ses->state_machine->connecting = 0;
 397                 return;
 398         }
 399
 400
 401         if( strcmp( name, "error" ) == 0 ) {
 402                 ses->state_machine->in_message_error = 1;
 403                 buffer_add( ses->message_error_type, get_xml_attr( atts, "type" ) );
 404                 ses->message_error_code = atoi( get_xml_attr( atts, "code" ) );
 405                 warning_handler( "Received <error> message" );
 406                 return;
 407         }
 408
 409         if( strcmp( name, "iq" ) == 0 ) {
 410                 ses->state_machine->in_iq = 1;
 411
 412                 if( strcmp( get_xml_attr(atts, "type"), "result") == 0
 413                                 && ses->state_machine->connecting == CONNECTING_2 ) {
 414                         ses->state_machine->connected = 1;
 415                         ses->state_machine->connecting = 0;
 416                         return;
 417                 }
 418
 419                 if( strcmp( get_xml_attr(atts, "type"), "error") == 0 ) {
 420                         warning_handler( "Error connecting to jabber" );
 421                         return;
 422                 }
 423         }
 424 }
 425
 426 char* get_xml_attr( const xmlChar** atts, char* attr_name ) {
 427         int i;
 428         if (atts != NULL) {
 429                 for(i = 0;(atts[i] != NULL);i++) {
 430                         if( strcmp( atts[i++], attr_name ) == 0 ) {
 431                                 if( atts[i] != NULL ) {
 432                                         return (char*) atts[i];
 433                                 }
 434                         }
 435                 }
 436         }
 437         return NULL;
 438 }
 439
 440
 441 // ------------------------------------------------------------------
 442 // See which tags are ending
 443 // ------------------------------------------------------------------
 444 void endElementHandler( void *session, const xmlChar *name) {
 445         transport_session* ses = (transport_session*) session;
 446         if( ! ses ) { return; }
 447
 448         if( strcmp( name, "message" ) == 0 ) {
 449
 450                 /* pass off the message info the callback */
 451                 if( ses->message_callback ) {
 452
 453                         /* here it's ok to pass in the raw buffers because
 454                                 message_init allocates new space for the chars
 455                                 passed in */
 456                         transport_message* msg =  message_init(
 457                                 ses->body_buffer->buf,
 458                                 ses->subject_buffer->buf,
 459                                 ses->thread_buffer->buf,
 460                                 ses->recipient_buffer->buf,
 461                                 ses->from_buffer->buf );
 462
 463                         message_set_router_info( msg,
 464                                 ses->router_from_buffer->buf,
 465                                 ses->router_to_buffer->buf,
 466                                 ses->router_class_buffer->buf,
 467                                 ses->router_command_buffer->buf,
 468                                 ses->router_broadcast );
 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( name, "body" ) == 0 ) {
 484                 ses->state_machine->in_message_body = 0;
 485                 return;
 486         }
 487
 488         if( strcmp( name, "subject" ) == 0 ) {
 489                 ses->state_machine->in_subject = 0;
 490                 return;
 491         }
 492
 493         if( strcmp( name, "thread" ) == 0 ) {
 494                 ses->state_machine->in_thread = 0;
 495                 return;
 496         }
 497
 498         if( strcmp( name, "iq" ) == 0 ) {
 499                 ses->state_machine->in_iq = 0;
 500                 if( ses->message_error_code > 0 ) {
 501                         warning_handler( "Error in IQ packet: code %d",  ses->message_error_code );
 502                         warning_handler( "Error 401 means not authorized" );
 503                 }
 504                 reset_session_buffers( session );
 505                 return;
 506         }
 507
 508         if( strcmp( 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( name, "status" ) == 0 ) {
 520                 ses->state_machine->in_status = 0;
 521                 return;
 522         }
 523
 524         if( strcmp( name, "error" ) == 0 ) {
 525                 ses->state_machine->in_message_error = 0;
 526                 return;
 527         }
 528
 529         if( strcmp( 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->router_to_buffer );
 543         buffer_reset( ses->router_class_buffer );
 544         buffer_reset( ses->router_command_buffer );
 545         buffer_reset( ses->message_error_type );
 546         buffer_reset( ses->session_id );
 547
 548         return 1;
 549 }
 550
 551 // ------------------------------------------------------------------
 552 // takes data out of the body of the message and pushes it into
 553 // the appropriate buffer
 554 // ------------------------------------------------------------------
 555 void characterHandler(
 556                 void *session, const xmlChar *ch, int len) {
 557
 558         char data[len+1];
 559         memset( data, 0, 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                 warning_handler( "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, "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, "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         return tcp_disconnect( session->sock_obj );
 621 }
 622