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                 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_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 0; }
 129
 130         if( ! session->state_machine->connected ) {
 131                 warning_handler("State machine is not connected in send_msg()");
 132                 return 0;
 133         }
 134
 135         message_prepare_xml( msg );
 136         //tcp_send( session->sock_obj, msg->msg_xml );
 137         socket_send( session->sock_id, msg->msg_xml );
 138
 139         return 1;
 140
 141 }
 142
 143
 144 /* connects to server and connects to jabber */
 145 int session_connect( transport_session* session,
 146                 const char* username, const char* password,
 147                 const char* resource, int connect_timeout, enum TRANSPORT_AUTH_TYPE auth_type ) {
 148
 149         int size1 = 0;
 150         int size2 = 0;
 151
 152         if( ! session ) {
 153                 warning_handler( "session is null in connect" );
 154                 return 0;
 155         }
 156
 157
 158         //char* server = session->sock_obj->server;
 159         char* server = session->server;
 160
 161         if( ! session->sock_id ) {
 162
 163                 if(session->port > 0) {
 164                         if( (session->sock_id = socket_open_tcp_client(
 165                                 session->sock_mgr, session->port, session->server)) <= 0 )
 166                         return 0;
 167
 168                 } else if(session->unix_path != NULL) {
 169                         if( (session->sock_id = socket_open_unix_client(
 170                                 session->sock_mgr, session->unix_path)) <= 0 )
 171                         return 0;
 172                 }
 173         }
 174
 175         if( session->component ) {
 176
 177                 /* the first Jabber connect stanza */
 178                 char* our_hostname = getenv("HOSTNAME");
 179                 size1 = 150 + strlen( server );
 180                 char stanza1[ size1 ];
 181                 memset( stanza1, 0, size1 );
 182                 sprintf( stanza1,
 183                                 "<stream:stream version='1.0' xmlns:stream='http://etherx.jabber.org/streams' "
 184                                 "xmlns='jabber:component:accept' to='%s' from='%s' xml:lang='en'>",
 185                                 username, our_hostname );
 186
 187                 /* send the first stanze */
 188                 session->state_machine->connecting = CONNECTING_1;
 189
 190 //              if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 191                 if( socket_send( session->sock_id, stanza1 ) ) {
 192                         warning_handler("error sending");
 193                         return 0;
 194                 }
 195
 196                 /* wait for reply */
 197                 //tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 198                 socket_wait(session->sock_mgr, connect_timeout, session->sock_id);
 199
 200                 /* server acknowledges our existence, now see if we can login */
 201                 if( session->state_machine->connecting == CONNECTING_2 ) {
 202
 203                         int ss = session->session_id->n_used + strlen(password) + 5;
 204                         char hashstuff[ss];
 205                         memset(hashstuff,0,ss);
 206                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 207
 208                         char* hash = shahash( hashstuff );
 209                         size2 = 100 + strlen( hash );
 210                         char stanza2[ size2 ];
 211                         memset( stanza2, 0, size2 );
 212                         sprintf( stanza2, "<handshake>%s</handshake>", hash );
 213
 214                         //if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 215                         if( socket_send( session->sock_id, stanza2 )  ) {
 216                                 warning_handler("error sending");
 217                                 return 0;
 218                         }
 219                 }
 220
 221         } else { /* we're not a component */
 222
 223                 /* the first Jabber connect stanza */
 224                 size1 = 100 + strlen( server );
 225                 char stanza1[ size1 ];
 226                 memset( stanza1, 0, size1 );
 227                 sprintf( stanza1,
 228                                 "<stream:stream to='%s' xmlns='jabber:client' "
 229                                 "xmlns:stream='http://etherx.jabber.org/streams'>",
 230                         server );
 231
 232
 233                 /* send the first stanze */
 234                 session->state_machine->connecting = CONNECTING_1;
 235                 //if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 236                 if( socket_send( session->sock_id, stanza1 ) ) {
 237                         warning_handler("error sending");
 238                         return 0;
 239                 }
 240
 241
 242                 /* wait for reply */
 243                 //tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 244                 socket_wait( session->sock_mgr, connect_timeout, session->sock_id ); /* make the timeout smarter XXX */
 245
 246                 if( auth_type == AUTH_PLAIN ) {
 247
 248                         /* the second jabber connect stanza including login info*/
 249                         size2 = 150 + strlen( username ) + strlen(password) + strlen(resource);
 250                         char stanza2[ size2 ];
 251                         memset( stanza2, 0, size2 );
 252
 253                         sprintf( stanza2,
 254                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'>"
 255                                         "<username>%s</username><password>%s</password><resource>%s</resource></query></iq>",
 256                                         username, password, resource );
 257
 258                         /* server acknowledges our existence, now see if we can login */
 259                         if( session->state_machine->connecting == CONNECTING_2 ) {
 260                                 //if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 261                                 if( socket_send( session->sock_id, stanza2 )  ) {
 262                                         warning_handler("error sending");
 263                                         return 0;
 264                                 }
 265                         }
 266
 267                 } else if( auth_type == AUTH_DIGEST ) {
 268
 269                         int ss = session->session_id->n_used + strlen(password) + 5;
 270                         char hashstuff[ss];
 271                         memset(hashstuff,0,ss);
 272                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 273
 274                         char* hash = shahash( hashstuff );
 275
 276                         /* the second jabber connect stanza including login info*/
 277                         size2 = 150 + strlen( hash ) + strlen(password) + strlen(resource);
 278                         char stanza2[ size2 ];
 279                         memset( stanza2, 0, size2 );
 280
 281                         sprintf( stanza2,
 282                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'>"
 283                                         "<username>%s</username><digest>%s</digest><resource>%s</resource></query></iq>",
 284                                         username, hash, resource );
 285
 286                         /* server acknowledges our existence, now see if we can login */
 287                         if( session->state_machine->connecting == CONNECTING_2 ) {
 288                                 //if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 289                                 if( socket_send( session->sock_id, stanza2 )  ) {
 290                                         warning_handler("error sending");
 291                                         return 0;
 292                                 }
 293                         }
 294
 295                 }
 296
 297         } // not component
 298
 299
 300         /* wait for reply */
 301         //tcp_wait( session->sock_obj, connect_timeout );
 302         socket_wait( session->sock_mgr, connect_timeout, session->sock_id );
 303
 304         if( session->state_machine->connected ) {
 305                 /* yar! */
 306                 return 1;
 307         }
 308
 309         return 0;
 310 }
 311
 312 // ---------------------------------------------------------------------------------
 313 // TCP data callback. Shove the data into the push parser.
 314 // ---------------------------------------------------------------------------------
 315 //void grab_incoming( void * session, char* data ) {
 316 void grab_incoming(void* blob, socket_manager* mgr, int sockid, char* data, int parent) {
 317         transport_session* ses = (transport_session*) blob;
 318         if( ! ses ) { return; }
 319         xmlParseChunk(ses->parser_ctxt, data, strlen(data), 0);
 320 }
 321
 322
 323 void startElementHandler(
 324         void *session, const xmlChar *name, const xmlChar **atts) {
 325
 326         transport_session* ses = (transport_session*) session;
 327         if( ! ses ) { return; }
 328
 329
 330         if( strcmp( name, "message" ) == 0 ) {
 331                 ses->state_machine->in_message = 1;
 332                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 333                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 334                 buffer_add( ses->router_from_buffer, get_xml_attr( atts, "router_from" ) );
 335                 buffer_add( ses->router_to_buffer, get_xml_attr( atts, "router_to" ) );
 336                 buffer_add( ses->router_class_buffer, get_xml_attr( atts, "router_class" ) );
 337                 buffer_add( ses->router_command_buffer, get_xml_attr( atts, "router_command" ) );
 338                 char* broadcast = get_xml_attr( atts, "broadcast" );
 339                 if( broadcast )
 340                         ses->router_broadcast = atoi( broadcast );
 341
 342                 return;
 343         }
 344
 345         if( ses->state_machine->in_message ) {
 346
 347                 if( strcmp( name, "body" ) == 0 ) {
 348                         ses->state_machine->in_message_body = 1;
 349                         return;
 350                 }
 351
 352                 if( strcmp( name, "subject" ) == 0 ) {
 353                         ses->state_machine->in_subject = 1;
 354                         return;
 355                 }
 356
 357                 if( strcmp( name, "thread" ) == 0 ) {
 358                         ses->state_machine->in_thread = 1;
 359                         return;
 360                 }
 361
 362         }
 363
 364         if( strcmp( name, "presence" ) == 0 ) {
 365                 ses->state_machine->in_presence = 1;
 366                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 367                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 368                 return;
 369         }
 370
 371         if( strcmp( name, "status" ) == 0 ) {
 372                 ses->state_machine->in_status = 1;
 373                 return;
 374         }
 375
 376
 377         if( strcmp( name, "stream:error" ) == 0 ) {
 378                 ses->state_machine->in_error = 1;
 379                 warning_handler( "Received <stream:error> message from Jabber server" );
 380                 return;
 381         }
 382
 383
 384         /* first server response from a connect attempt */
 385         if( strcmp( name, "stream:stream" ) == 0 ) {
 386                 if( ses->state_machine->connecting == CONNECTING_1 ) {
 387                         ses->state_machine->connecting = CONNECTING_2;
 388                         buffer_add( ses->session_id, get_xml_attr(atts, "id") );
 389                 }
 390         }
 391
 392         if( strcmp( name, "handshake" ) == 0 ) {
 393                 ses->state_machine->connected = 1;
 394                 ses->state_machine->connecting = 0;
 395                 return;
 396         }
 397
 398
 399         if( strcmp( name, "error" ) == 0 ) {
 400                 ses->state_machine->in_message_error = 1;
 401                 buffer_add( ses->message_error_type, get_xml_attr( atts, "type" ) );
 402                 ses->message_error_code = atoi( get_xml_attr( atts, "code" ) );
 403                 warning_handler( "Received <error> message with type %s and code %s",
 404                         get_xml_attr( atts, "type"), get_xml_attr( atts, "code") );
 405                 return;
 406         }
 407
 408         if( strcmp( name, "iq" ) == 0 ) {
 409                 ses->state_machine->in_iq = 1;
 410
 411                 if( strcmp( get_xml_attr(atts, "type"), "result") == 0
 412                                 && ses->state_machine->connecting == CONNECTING_2 ) {
 413                         ses->state_machine->connected = 1;
 414                         ses->state_machine->connecting = 0;
 415                         return;
 416                 }
 417
 418                 if( strcmp( get_xml_attr(atts, "type"), "error") == 0 ) {
 419                         warning_handler( "Error connecting to jabber" );
 420                         return;
 421                 }
 422         }
 423 }
 424
 425 char* get_xml_attr( const xmlChar** atts, char* attr_name ) {
 426         int i;
 427         if (atts != NULL) {
 428                 for(i = 0;(atts[i] != NULL);i++) {
 429                         if( strcmp( atts[i++], attr_name ) == 0 ) {
 430                                 if( atts[i] != NULL ) {
 431                                         return (char*) atts[i];
 432                                 }
 433                         }
 434                 }
 435         }
 436         return NULL;
 437 }
 438
 439
 440 // ------------------------------------------------------------------
 441 // See which tags are ending
 442 // ------------------------------------------------------------------
 443 void endElementHandler( void *session, const xmlChar *name) {
 444         transport_session* ses = (transport_session*) session;
 445         if( ! ses ) { return; }
 446
 447         if( strcmp( name, "message" ) == 0 ) {
 448
 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, "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