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, 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' "
 176                                 "xmlns='jabber:component:accept' to='%s' from='%s' xml:lang='en'>",
 177                                 username, our_hostname );
 178
 179                 /* send the first stanze */
 180                 session->state_machine->connecting = CONNECTING_1;
 181                 if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 182                         warning_handler("error sending");
 183                         return 0;
 184                 }
 185
 186                 /* wait for reply */
 187                 tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 188
 189                 /* server acknowledges our existence, now see if we can login */
 190                 if( session->state_machine->connecting == CONNECTING_2 ) {
 191
 192                         int ss = session->session_id->n_used + strlen(password) + 5;
 193                         char hashstuff[ss];
 194                         memset(hashstuff,0,ss);
 195                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 196
 197                         char* hash = shahash( hashstuff );
 198                         size2 = 100 + strlen( hash );
 199                         char stanza2[ size2 ];
 200                         memset( stanza2, 0, size2 );
 201                         sprintf( stanza2, "<handshake>%s</handshake>", hash );
 202
 203                         if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 204                                 warning_handler("error sending");
 205                                 return 0;
 206                         }
 207                 }
 208
 209         } else { /* we're not a component */
 210
 211                 /* the first Jabber connect stanza */
 212                 size1 = 100 + strlen( server );
 213                 char stanza1[ size1 ];
 214                 memset( stanza1, 0, size1 );
 215                 sprintf( stanza1,
 216                                 "<stream:stream to='%s' xmlns='jabber:client' "
 217                                 "xmlns:stream='http://etherx.jabber.org/streams'>",
 218                         server );
 219
 220
 221                 /* send the first stanze */
 222                 session->state_machine->connecting = CONNECTING_1;
 223                 if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 224                         warning_handler("error sending");
 225                         return 0;
 226                 }
 227
 228
 229                 /* wait for reply */
 230                 tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 231
 232                 if( auth_type == AUTH_PLAIN ) {
 233
 234                         /* the second jabber connect stanza including login info*/
 235                         size2 = 150 + strlen( username ) + strlen(password) + strlen(resource);
 236                         char stanza2[ size2 ];
 237                         memset( stanza2, 0, size2 );
 238
 239                         sprintf( stanza2,
 240                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'>"
 241                                         "<username>%s</username><password>%s</password><resource>%s</resource></query></iq>",
 242                                         username, password, resource );
 243
 244                         /* server acknowledges our existence, now see if we can login */
 245                         if( session->state_machine->connecting == CONNECTING_2 ) {
 246                                 if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 247                                         warning_handler("error sending");
 248                                         return 0;
 249                                 }
 250                         }
 251
 252                 } else if( auth_type == AUTH_DIGEST ) {
 253
 254                         int ss = session->session_id->n_used + strlen(password) + 5;
 255                         char hashstuff[ss];
 256                         memset(hashstuff,0,ss);
 257                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 258
 259                         char* hash = shahash( hashstuff );
 260
 261                         /* the second jabber connect stanza including login info*/
 262                         size2 = 150 + strlen( hash ) + strlen(password) + strlen(resource);
 263                         char stanza2[ size2 ];
 264                         memset( stanza2, 0, size2 );
 265
 266                         sprintf( stanza2,
 267                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'>"
 268                                         "<username>%s</username><digest>%s</digest><resource>%s</resource></query></iq>",
 269                                         username, hash, resource );
 270
 271                         /* server acknowledges our existence, now see if we can login */
 272                         if( session->state_machine->connecting == CONNECTING_2 ) {
 273                                 if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 274                                         warning_handler("error sending");
 275                                         return 0;
 276                                 }
 277                         }
 278
 279                 }
 280
 281         } // not component
 282
 283
 284         /* wait for reply */
 285         tcp_wait( session->sock_obj, connect_timeout );
 286
 287         if( session->state_machine->connected ) {
 288                 /* yar! */
 289                 return 1;
 290         }
 291
 292         return 0;
 293 }
 294
 295 // ---------------------------------------------------------------------------------
 296 // TCP data callback. Shove the data into the push parser.
 297 // ---------------------------------------------------------------------------------
 298 void grab_incoming( void * session, char* data ) {
 299         transport_session* ses = (transport_session*) session;
 300         if( ! ses ) { return; }
 301         debug_handler("Parsing incoming XML chunk");
 302         xmlParseChunk(ses->parser_ctxt, data, strlen(data), 0);
 303         debug_handler("Completed parsing incoming XML chunk");
 304 }
 305
 306
 307 void startElementHandler(
 308         void *session, const xmlChar *name, const xmlChar **atts) {
 309
 310         transport_session* ses = (transport_session*) session;
 311         if( ! ses ) { return; }
 312
 313
 314         if( strcmp( name, "message" ) == 0 ) {
 315                 ses->state_machine->in_message = 1;
 316                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 317                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 318                 buffer_add( ses->router_from_buffer, get_xml_attr( atts, "router_from" ) );
 319                 buffer_add( ses->router_to_buffer, get_xml_attr( atts, "router_to" ) );
 320                 buffer_add( ses->router_class_buffer, get_xml_attr( atts, "router_class" ) );
 321                 buffer_add( ses->router_command_buffer, get_xml_attr( atts, "router_command" ) );
 322                 char* broadcast = get_xml_attr( atts, "broadcast" );
 323                 if( broadcast )
 324                         ses->router_broadcast = atoi( broadcast );
 325
 326                 return;
 327         }
 328
 329         if( ses->state_machine->in_message ) {
 330
 331                 if( strcmp( name, "body" ) == 0 ) {
 332                         ses->state_machine->in_message_body = 1;
 333                         return;
 334                 }
 335
 336                 if( strcmp( name, "subject" ) == 0 ) {
 337                         ses->state_machine->in_subject = 1;
 338                         return;
 339                 }
 340
 341                 if( strcmp( name, "thread" ) == 0 ) {
 342                         ses->state_machine->in_thread = 1;
 343                         return;
 344                 }
 345
 346         }
 347
 348         if( strcmp( name, "presence" ) == 0 ) {
 349                 ses->state_machine->in_presence = 1;
 350                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 351                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 352                 return;
 353         }
 354
 355         if( strcmp( name, "status" ) == 0 ) {
 356                 ses->state_machine->in_status = 1;
 357                 return;
 358         }
 359
 360
 361         if( strcmp( name, "stream:error" ) == 0 ) {
 362                 ses->state_machine->in_error = 1;
 363                 warning_handler( "Received <stream:error> message from Jabber server" );
 364                 return;
 365         }
 366
 367
 368         /* first server response from a connect attempt */
 369         if( strcmp( name, "stream:stream" ) == 0 ) {
 370                 if( ses->state_machine->connecting == CONNECTING_1 ) {
 371                         ses->state_machine->connecting = CONNECTING_2;
 372                         buffer_add( ses->session_id, get_xml_attr(atts, "id") );
 373                 }
 374         }
 375
 376         if( strcmp( name, "handshake" ) == 0 ) {
 377                 ses->state_machine->connected = 1;
 378                 ses->state_machine->connecting = 0;
 379                 return;
 380         }
 381
 382
 383         if( strcmp( name, "error" ) == 0 ) {
 384                 ses->state_machine->in_message_error = 1;
 385                 buffer_add( ses->message_error_type, get_xml_attr( atts, "type" ) );
 386                 ses->message_error_code = atoi( get_xml_attr( atts, "code" ) );
 387                 warning_handler( "Received <error> message" );
 388                 return;
 389         }
 390
 391         if( strcmp( name, "iq" ) == 0 ) {
 392                 ses->state_machine->in_iq = 1;
 393
 394                 if( strcmp( get_xml_attr(atts, "type"), "result") == 0
 395                                 && ses->state_machine->connecting == CONNECTING_2 ) {
 396                         ses->state_machine->connected = 1;
 397                         ses->state_machine->connecting = 0;
 398                         return;
 399                 }
 400
 401                 if( strcmp( get_xml_attr(atts, "type"), "error") == 0 ) {
 402                         warning_handler( "Error connecting to jabber" );
 403                         return;
 404                 }
 405         }
 406 }
 407
 408 char* get_xml_attr( const xmlChar** atts, char* attr_name ) {
 409         int i;
 410         if (atts != NULL) {
 411                 for(i = 0;(atts[i] != NULL);i++) {
 412                         if( strcmp( atts[i++], attr_name ) == 0 ) {
 413                                 if( atts[i] != NULL ) {
 414                                         return (char*) atts[i];
 415                                 }
 416                         }
 417                 }
 418         }
 419         return NULL;
 420 }
 421
 422
 423 // ------------------------------------------------------------------
 424 // See which tags are ending
 425 // ------------------------------------------------------------------
 426 void endElementHandler( void *session, const xmlChar *name) {
 427         transport_session* ses = (transport_session*) session;
 428         if( ! ses ) { return; }
 429
 430         if( strcmp( name, "message" ) == 0 ) {
 431
 432
 433                 /*
 434                 int                     bufsize;
 435                 xmlChar*                xmlbuf;
 436                 xmlDocDumpFormatMemory( ses->parser_ctxt->myDoc, &xmlbuf, &bufsize, 0 );
 437                 debug_handler("endElementHandler SAX Doc:\n%s\n", (char*) xmlbuf );
 438                 xmlFree(xmlbuf);
 439                 */
 440
 441                 /* pass off the message info the callback */
 442                 if( ses->message_callback ) {
 443
 444                         /* here it's ok to pass in the raw buffers because
 445                                 message_init allocates new space for the chars
 446                                 passed in */
 447                         transport_message* msg =  message_init(
 448                                 ses->body_buffer->buf,
 449                                 ses->subject_buffer->buf,
 450                                 ses->thread_buffer->buf,
 451                                 ses->recipient_buffer->buf,
 452                                 ses->from_buffer->buf );
 453
 454                         message_set_router_info( msg,
 455                                 ses->router_from_buffer->buf,
 456                                 ses->router_to_buffer->buf,
 457                                 ses->router_class_buffer->buf,
 458                                 ses->router_command_buffer->buf,
 459                                 ses->router_broadcast );
 460
 461                         if( ses->message_error_type->n_used > 0 ) {
 462                                 set_msg_error( msg, ses->message_error_type->buf, ses->message_error_code );
 463                         }
 464
 465                         if( msg == NULL ) { return; }
 466                         ses->message_callback( ses->user_data, msg );
 467                 }
 468
 469                 ses->state_machine->in_message = 0;
 470                 reset_session_buffers( session );
 471                 return;
 472         }
 473
 474         if( strcmp( name, "body" ) == 0 ) {
 475                 ses->state_machine->in_message_body = 0;
 476                 return;
 477         }
 478
 479         if( strcmp( name, "subject" ) == 0 ) {
 480                 ses->state_machine->in_subject = 0;
 481                 return;
 482         }
 483
 484         if( strcmp( name, "thread" ) == 0 ) {
 485                 ses->state_machine->in_thread = 0;
 486                 return;
 487         }
 488
 489         if( strcmp( name, "iq" ) == 0 ) {
 490                 ses->state_machine->in_iq = 0;
 491                 if( ses->message_error_code > 0 ) {
 492                         warning_handler( "Error in IQ packet: code %d",  ses->message_error_code );
 493                         warning_handler( "Error 401 means not authorized" );
 494                 }
 495                 reset_session_buffers( session );
 496                 return;
 497         }
 498
 499         if( strcmp( name, "presence" ) == 0 ) {
 500                 ses->state_machine->in_presence = 0;
 501                 /*
 502                 if( ses->presence_callback ) {
 503                         // call the callback with the status, etc.
 504                 }
 505                 */
 506                 reset_session_buffers( session );
 507                 return;
 508         }
 509
 510         if( strcmp( name, "status" ) == 0 ) {
 511                 ses->state_machine->in_status = 0;
 512                 return;
 513         }
 514
 515         if( strcmp( name, "error" ) == 0 ) {
 516                 ses->state_machine->in_message_error = 0;
 517                 return;
 518         }
 519
 520         if( strcmp( name, "error:error" ) == 0 ) {
 521                 ses->state_machine->in_error = 0;
 522                 return;
 523         }
 524 }
 525
 526 int reset_session_buffers( transport_session* ses ) {
 527         buffer_reset( ses->body_buffer );
 528         buffer_reset( ses->subject_buffer );
 529         buffer_reset( ses->thread_buffer );
 530         buffer_reset( ses->from_buffer );
 531         buffer_reset( ses->recipient_buffer );
 532         buffer_reset( ses->router_from_buffer );
 533         buffer_reset( ses->router_to_buffer );
 534         buffer_reset( ses->router_class_buffer );
 535         buffer_reset( ses->router_command_buffer );
 536         buffer_reset( ses->message_error_type );
 537         buffer_reset( ses->session_id );
 538
 539         return 1;
 540 }
 541
 542 // ------------------------------------------------------------------
 543 // takes data out of the body of the message and pushes it into
 544 // the appropriate buffer
 545 // ------------------------------------------------------------------
 546 void characterHandler(
 547                 void *session, const xmlChar *ch, int len) {
 548
 549         char data[len+1];
 550         memset( data, 0, len+1 );
 551         strncpy( data, (char*) ch, len );
 552         data[len] = 0;
 553
 554         //printf( "Handling characters: %s\n", data );
 555         transport_session* ses = (transport_session*) session;
 556         if( ! ses ) { return; }
 557
 558         /* set the various message parts */
 559         if( ses->state_machine->in_message ) {
 560
 561                 if( ses->state_machine->in_message_body ) {
 562                         buffer_add( ses->body_buffer, data );
 563                 }
 564
 565                 if( ses->state_machine->in_subject ) {
 566                         buffer_add( ses->subject_buffer, data );
 567                 }
 568
 569                 if( ses->state_machine->in_thread ) {
 570                         buffer_add( ses->thread_buffer, data );
 571                 }
 572         }
 573
 574         /* set the presence status */
 575         if( ses->state_machine->in_presence && ses->state_machine->in_status ) {
 576                 buffer_add( ses->status_buffer, data );
 577         }
 578
 579         if( ses->state_machine->in_error ) {
 580                 /* for now... */
 581                 warning_handler( "ERROR Xml fragment: %s\n", ch );
 582         }
 583
 584 }
 585
 586 /* XXX change to warning handlers */
 587 void  parseWarningHandler( void *session, const char* msg, ... ) {
 588
 589         va_list args;
 590         va_start(args, msg);
 591         fprintf(stdout, "transport_session XML WARNING");
 592         vfprintf(stdout, msg, args);
 593         va_end(args);
 594         fprintf(stderr, "XML WARNING: %s\n", msg );
 595 }
 596
 597 void  parseErrorHandler( void *session, const char* msg, ... ){
 598
 599         va_list args;
 600         va_start(args, msg);
 601         fprintf(stdout, "transport_session XML ERROR");
 602         vfprintf(stdout, msg, args);
 603         va_end(args);
 604         fprintf(stderr, "XML ERROR: %s\n", msg );
 605
 606 }
 607
 608 int session_disconnect( transport_session* session ) {
 609         if( session == NULL ) { return 0; }
 610         tcp_send( session->sock_obj, "</stream:stream>");
 611         return tcp_disconnect( session->sock_obj );
 612 }
 613