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         if(     session->body_buffer            == NULL || session->subject_buffer       == NULL        ||
  37                         session->thread_buffer  == NULL || session->from_buffer          == NULL        ||
  38                         session->status_buffer  == NULL || session->recipient_buffer == NULL ||
  39                         session->router_to_buffer       == NULL || session->router_from_buffer   == NULL ||
  40                         session->router_class_buffer == NULL || session->router_command_buffer == NULL ||
  41                         session->session_id == NULL ) {
  42
  43                 fatal_handler( "init_transport(): buffer_init returned NULL" );
  44                 return 0;
  45         }
  46
  47
  48         /* initialize the jabber state machine */
  49         session->state_machine = (jabber_machine*) safe_malloc( sizeof(jabber_machine) );
  50
  51         /* initialize the sax push parser */
  52         session->parser_ctxt = xmlCreatePushParserCtxt(SAXHandler, session, "", 0, NULL);
  53
  54         /* initialize the transport_socket structure */
  55         session->sock_obj = (transport_socket*) safe_malloc( sizeof(transport_socket) );
  56
  57         //int serv_size = strlen( server );
  58         session->sock_obj->server = server;
  59         session->sock_obj->port = port;
  60         session->sock_obj->data_received_callback = &grab_incoming;
  61
  62         /* this will be handed back to us in callbacks */
  63         session->sock_obj->user_data = session;
  64
  65         return session;
  66 }
  67
  68
  69
  70 /* XXX FREE THE BUFFERS */
  71 int session_free( transport_session* session ) {
  72         if( ! session ) { return 0; }
  73
  74         if( session->sock_obj )
  75                 free( session->sock_obj );
  76
  77         if( session->state_machine ) free( session->state_machine );
  78         if( session->parser_ctxt) {
  79                 xmlCleanupCharEncodingHandlers();
  80                 xmlFreeDoc( session->parser_ctxt->myDoc );
  81                 xmlFreeParserCtxt(session->parser_ctxt);
  82         }
  83         xmlCleanupParser();
  84
  85         buffer_free(session->body_buffer);
  86         buffer_free(session->subject_buffer);
  87         buffer_free(session->thread_buffer);
  88         buffer_free(session->from_buffer);
  89         buffer_free(session->recipient_buffer);
  90         buffer_free(session->status_buffer);
  91         buffer_free(session->message_error_type);
  92         buffer_free(session->router_to_buffer);
  93         buffer_free(session->router_from_buffer);
  94         buffer_free(session->router_class_buffer);
  95         buffer_free(session->router_command_buffer);
  96         buffer_free(session->session_id);
  97
  98
  99         free( session );
 100         return 1;
 101 }
 102
 103
 104 int session_wait( transport_session* session, int timeout ) {
 105         if( ! session || ! session->sock_obj ) {
 106                 return 0;
 107         }
 108         int ret =  tcp_wait( session->sock_obj, timeout );
 109         if( ! ret ) {
 110                 session->state_machine->connected = 0;
 111         }
 112         return ret;
 113 }
 114
 115 int session_send_msg(
 116                 transport_session* session, transport_message* msg ) {
 117
 118         if( ! session ) { return 0; }
 119
 120         if( ! session->state_machine->connected ) {
 121                 warning_handler("State machine is not connected in send_msg()");
 122                 return 0;
 123         }
 124
 125         message_prepare_xml( msg );
 126         tcp_send( session->sock_obj, msg->msg_xml );
 127
 128         return 1;
 129
 130 }
 131
 132
 133 /* connects to server and connects to jabber */
 134 int session_connect( transport_session* session,
 135                 const char* username, const char* password,
 136                 const char* resource, int connect_timeout, enum TRANSPORT_AUTH_TYPE auth_type ) {
 137
 138         int size1 = 0;
 139         int size2 = 0;
 140
 141         if( ! session ) {
 142                 warning_handler( "session is null in connect" );
 143                 return 0;
 144         }
 145
 146
 147         char* server = session->sock_obj->server;
 148
 149         if( ! session->sock_obj ) {
 150                 return 0;
 151         }
 152
 153         if( ! session->sock_obj->connected ) {
 154                 if( ! tcp_connect( session->sock_obj ))
 155                         return 0;
 156         }
 157
 158         if( session->component ) {
 159
 160                 /* the first Jabber connect stanza */
 161                 char* our_hostname = getenv("HOSTNAME");
 162                 size1 = 150 + strlen( server );
 163                 char stanza1[ size1 ];
 164                 memset( stanza1, 0, size1 );
 165                 sprintf( stanza1,
 166                                 "<stream:stream version='1.0' xmlns:stream='http://etherx.jabber.org/streams' "
 167                                 "xmlns='jabber:component:accept' to='%s' from='%s' xml:lang='en'>",
 168                                 username, our_hostname );
 169
 170                 /* send the first stanze */
 171                 session->state_machine->connecting = CONNECTING_1;
 172                 if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 173                         warning_handler("error sending");
 174                         return 0;
 175                 }
 176
 177                 /* wait for reply */
 178                 tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 179
 180                 /* server acknowledges our existence, now see if we can login */
 181                 if( session->state_machine->connecting == CONNECTING_2 ) {
 182
 183                         int ss = session->session_id->n_used + strlen(password) + 5;
 184                         char hashstuff[ss];
 185                         memset(hashstuff,0,ss);
 186                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 187
 188                         char* hash = shahash( hashstuff );
 189                         size2 = 100 + strlen( hash );
 190                         char stanza2[ size2 ];
 191                         memset( stanza2, 0, size2 );
 192                         sprintf( stanza2, "<handshake>%s</handshake>", hash );
 193
 194                         if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 195                                 warning_handler("error sending");
 196                                 return 0;
 197                         }
 198                 }
 199
 200         } else { /* we're not a component */
 201
 202                 /* the first Jabber connect stanza */
 203                 size1 = 100 + strlen( server );
 204                 char stanza1[ size1 ];
 205                 memset( stanza1, 0, size1 );
 206                 sprintf( stanza1,
 207                                 "<stream:stream to='%s' xmlns='jabber:client' "
 208                                 "xmlns:stream='http://etherx.jabber.org/streams'>",
 209                         server );
 210
 211
 212                 /* send the first stanze */
 213                 session->state_machine->connecting = CONNECTING_1;
 214                 if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 215                         warning_handler("error sending");
 216                         return 0;
 217                 }
 218
 219
 220                 /* wait for reply */
 221                 tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 222
 223                 if( auth_type == AUTH_PLAIN ) {
 224
 225                         /* the second jabber connect stanza including login info*/
 226                         size2 = 150 + strlen( username ) + strlen(password) + strlen(resource);
 227                         char stanza2[ size2 ];
 228                         memset( stanza2, 0, size2 );
 229
 230                         sprintf( stanza2,
 231                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'>"
 232                                         "<username>%s</username><password>%s</password><resource>%s</resource></query></iq>",
 233                                         username, password, resource );
 234
 235                         /* server acknowledges our existence, now see if we can login */
 236                         if( session->state_machine->connecting == CONNECTING_2 ) {
 237                                 if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 238                                         warning_handler("error sending");
 239                                         return 0;
 240                                 }
 241                         }
 242
 243                 } else if( auth_type == AUTH_DIGEST ) {
 244
 245                         int ss = session->session_id->n_used + strlen(password) + 5;
 246                         char hashstuff[ss];
 247                         memset(hashstuff,0,ss);
 248                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 249
 250                         char* hash = shahash( hashstuff );
 251
 252                         /* the second jabber connect stanza including login info*/
 253                         size2 = 150 + strlen( hash ) + strlen(password) + strlen(resource);
 254                         char stanza2[ size2 ];
 255                         memset( stanza2, 0, size2 );
 256
 257                         sprintf( stanza2,
 258                                         "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'>"
 259                                         "<username>%s</username><digest>%s</digest><resource>%s</resource></query></iq>",
 260                                         username, hash, resource );
 261
 262                         /* server acknowledges our existence, now see if we can login */
 263                         if( session->state_machine->connecting == CONNECTING_2 ) {
 264                                 if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 265                                         warning_handler("error sending");
 266                                         return 0;
 267                                 }
 268                         }
 269
 270                 }
 271
 272         } // not component
 273
 274
 275         /* wait for reply */
 276         tcp_wait( session->sock_obj, connect_timeout );
 277
 278         if( session->state_machine->connected ) {
 279                 /* yar! */
 280                 return 1;
 281         }
 282
 283         return 0;
 284 }
 285
 286 // ---------------------------------------------------------------------------------
 287 // TCP data callback. Shove the data into the push parser.
 288 // ---------------------------------------------------------------------------------
 289 void grab_incoming( void * session, char* data ) {
 290         transport_session* ses = (transport_session*) session;
 291         if( ! ses ) { return; }
 292         debug_handler("Parsing incoming XML chunk");
 293         xmlParseChunk(ses->parser_ctxt, data, strlen(data), 0);
 294         debug_handler("Completed parsing incoming XML chunk");
 295 }
 296
 297
 298 void startElementHandler(
 299         void *session, const xmlChar *name, const xmlChar **atts) {
 300
 301         transport_session* ses = (transport_session*) session;
 302         if( ! ses ) { return; }
 303
 304
 305         if( strcmp( name, "message" ) == 0 ) {
 306                 ses->state_machine->in_message = 1;
 307                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 308                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 309                 buffer_add( ses->router_from_buffer, get_xml_attr( atts, "router_from" ) );
 310                 buffer_add( ses->router_to_buffer, get_xml_attr( atts, "router_to" ) );
 311                 buffer_add( ses->router_class_buffer, get_xml_attr( atts, "router_class" ) );
 312                 buffer_add( ses->router_command_buffer, get_xml_attr( atts, "router_command" ) );
 313                 char* broadcast = get_xml_attr( atts, "broadcast" );
 314                 if( broadcast )
 315                         ses->router_broadcast = atoi( broadcast );
 316
 317                 return;
 318         }
 319
 320         if( ses->state_machine->in_message ) {
 321
 322                 if( strcmp( name, "body" ) == 0 ) {
 323                         ses->state_machine->in_message_body = 1;
 324                         return;
 325                 }
 326
 327                 if( strcmp( name, "subject" ) == 0 ) {
 328                         ses->state_machine->in_subject = 1;
 329                         return;
 330                 }
 331
 332                 if( strcmp( name, "thread" ) == 0 ) {
 333                         ses->state_machine->in_thread = 1;
 334                         return;
 335                 }
 336
 337         }
 338
 339         if( strcmp( name, "presence" ) == 0 ) {
 340                 ses->state_machine->in_presence = 1;
 341                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 342                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 343                 return;
 344         }
 345
 346         if( strcmp( name, "status" ) == 0 ) {
 347                 ses->state_machine->in_status = 1;
 348                 return;
 349         }
 350
 351
 352         if( strcmp( name, "stream:error" ) == 0 ) {
 353                 ses->state_machine->in_error = 1;
 354                 warning_handler( "Received <stream:error> message from Jabber server" );
 355                 return;
 356         }
 357
 358
 359         /* first server response from a connect attempt */
 360         if( strcmp( name, "stream:stream" ) == 0 ) {
 361                 if( ses->state_machine->connecting == CONNECTING_1 ) {
 362                         ses->state_machine->connecting = CONNECTING_2;
 363                         buffer_add( ses->session_id, get_xml_attr(atts, "id") );
 364                 }
 365         }
 366
 367         if( strcmp( name, "handshake" ) == 0 ) {
 368                 ses->state_machine->connected = 1;
 369                 ses->state_machine->connecting = 0;
 370                 return;
 371         }
 372
 373
 374         if( strcmp( name, "error" ) == 0 ) {
 375                 ses->state_machine->in_message_error = 1;
 376                 buffer_add( ses->message_error_type, get_xml_attr( atts, "type" ) );
 377                 ses->message_error_code = atoi( get_xml_attr( atts, "code" ) );
 378                 warning_handler( "Received <error> message" );
 379                 return;
 380         }
 381
 382         if( strcmp( name, "iq" ) == 0 ) {
 383                 ses->state_machine->in_iq = 1;
 384
 385                 if( strcmp( get_xml_attr(atts, "type"), "result") == 0
 386                                 && ses->state_machine->connecting == CONNECTING_2 ) {
 387                         ses->state_machine->connected = 1;
 388                         ses->state_machine->connecting = 0;
 389                         return;
 390                 }
 391
 392                 if( strcmp( get_xml_attr(atts, "type"), "error") == 0 ) {
 393                         warning_handler( "Error connecting to jabber" );
 394                         return;
 395                 }
 396         }
 397 }
 398
 399 char* get_xml_attr( const xmlChar** atts, char* attr_name ) {
 400         int i;
 401         if (atts != NULL) {
 402                 for(i = 0;(atts[i] != NULL);i++) {
 403                         if( strcmp( atts[i++], attr_name ) == 0 ) {
 404                                 if( atts[i] != NULL ) {
 405                                         return (char*) atts[i];
 406                                 }
 407                         }
 408                 }
 409         }
 410         return NULL;
 411 }
 412
 413
 414 // ------------------------------------------------------------------
 415 // See which tags are ending
 416 // ------------------------------------------------------------------
 417 void endElementHandler( void *session, const xmlChar *name) {
 418         transport_session* ses = (transport_session*) session;
 419         if( ! ses ) { return; }
 420
 421         if( strcmp( name, "message" ) == 0 ) {
 422
 423
 424                 /* pass off the message info the callback */
 425                 if( ses->message_callback ) {
 426
 427                         /* here it's ok to pass in the raw buffers because
 428                                 message_init allocates new space for the chars
 429                                 passed in */
 430                         transport_message* msg =  message_init(
 431                                 ses->body_buffer->buf,
 432                                 ses->subject_buffer->buf,
 433                                 ses->thread_buffer->buf,
 434                                 ses->recipient_buffer->buf,
 435                                 ses->from_buffer->buf );
 436
 437                         message_set_router_info( msg,
 438                                 ses->router_from_buffer->buf,
 439                                 ses->router_to_buffer->buf,
 440                                 ses->router_class_buffer->buf,
 441                                 ses->router_command_buffer->buf,
 442                                 ses->router_broadcast );
 443
 444                         if( ses->message_error_type->n_used > 0 ) {
 445                                 set_msg_error( msg, ses->message_error_type->buf, ses->message_error_code );
 446                         }
 447
 448                         if( msg == NULL ) { return; }
 449                         ses->message_callback( ses->user_data, msg );
 450                 }
 451
 452                 ses->state_machine->in_message = 0;
 453                 reset_session_buffers( session );
 454                 return;
 455         }
 456
 457         if( strcmp( name, "body" ) == 0 ) {
 458                 ses->state_machine->in_message_body = 0;
 459                 return;
 460         }
 461
 462         if( strcmp( name, "subject" ) == 0 ) {
 463                 ses->state_machine->in_subject = 0;
 464                 return;
 465         }
 466
 467         if( strcmp( name, "thread" ) == 0 ) {
 468                 ses->state_machine->in_thread = 0;
 469                 return;
 470         }
 471
 472         if( strcmp( name, "iq" ) == 0 ) {
 473                 ses->state_machine->in_iq = 0;
 474                 if( ses->message_error_code > 0 ) {
 475                         warning_handler( "Error in IQ packet: code %d",  ses->message_error_code );
 476                         warning_handler( "Error 401 means not authorized" );
 477                 }
 478                 reset_session_buffers( session );
 479                 return;
 480         }
 481
 482         if( strcmp( name, "presence" ) == 0 ) {
 483                 ses->state_machine->in_presence = 0;
 484                 /*
 485                 if( ses->presence_callback ) {
 486                         // call the callback with the status, etc.
 487                 }
 488                 */
 489                 reset_session_buffers( session );
 490                 return;
 491         }
 492
 493         if( strcmp( name, "status" ) == 0 ) {
 494                 ses->state_machine->in_status = 0;
 495                 return;
 496         }
 497
 498         if( strcmp( name, "error" ) == 0 ) {
 499                 ses->state_machine->in_message_error = 0;
 500                 return;
 501         }
 502
 503         if( strcmp( name, "error:error" ) == 0 ) {
 504                 ses->state_machine->in_error = 0;
 505                 return;
 506         }
 507 }
 508
 509 int reset_session_buffers( transport_session* ses ) {
 510         buffer_reset( ses->body_buffer );
 511         buffer_reset( ses->subject_buffer );
 512         buffer_reset( ses->thread_buffer );
 513         buffer_reset( ses->from_buffer );
 514         buffer_reset( ses->recipient_buffer );
 515         buffer_reset( ses->router_from_buffer );
 516         buffer_reset( ses->router_to_buffer );
 517         buffer_reset( ses->router_class_buffer );
 518         buffer_reset( ses->router_command_buffer );
 519         buffer_reset( ses->message_error_type );
 520         buffer_reset( ses->session_id );
 521
 522         return 1;
 523 }
 524
 525 // ------------------------------------------------------------------
 526 // takes data out of the body of the message and pushes it into
 527 // the appropriate buffer
 528 // ------------------------------------------------------------------
 529 void characterHandler(
 530                 void *session, const xmlChar *ch, int len) {
 531
 532         char data[len+1];
 533         memset( data, 0, len+1 );
 534         strncpy( data, (char*) ch, len );
 535         data[len] = 0;
 536
 537         //printf( "Handling characters: %s\n", data );
 538         transport_session* ses = (transport_session*) session;
 539         if( ! ses ) { return; }
 540
 541         /* set the various message parts */
 542         if( ses->state_machine->in_message ) {
 543
 544                 if( ses->state_machine->in_message_body ) {
 545                         buffer_add( ses->body_buffer, data );
 546                 }
 547
 548                 if( ses->state_machine->in_subject ) {
 549                         buffer_add( ses->subject_buffer, data );
 550                 }
 551
 552                 if( ses->state_machine->in_thread ) {
 553                         buffer_add( ses->thread_buffer, data );
 554                 }
 555         }
 556
 557         /* set the presence status */
 558         if( ses->state_machine->in_presence && ses->state_machine->in_status ) {
 559                 buffer_add( ses->status_buffer, data );
 560         }
 561
 562         if( ses->state_machine->in_error ) {
 563                 /* for now... */
 564                 warning_handler( "ERROR Xml fragment: %s\n", ch );
 565         }
 566
 567 }
 568
 569 /* XXX change to warning handlers */
 570 void  parseWarningHandler( void *session, const char* msg, ... ) {
 571
 572         va_list args;
 573         va_start(args, msg);
 574         fprintf(stdout, "transport_session XML WARNING");
 575         vfprintf(stdout, msg, args);
 576         va_end(args);
 577         fprintf(stderr, "XML WARNING: %s\n", msg );
 578 }
 579
 580 void  parseErrorHandler( void *session, const char* msg, ... ){
 581
 582         va_list args;
 583         va_start(args, msg);
 584         fprintf(stdout, "transport_session XML ERROR");
 585         vfprintf(stdout, msg, args);
 586         va_end(args);
 587         fprintf(stderr, "XML ERROR: %s\n", msg );
 588
 589 }
 590
 591 int session_disconnect( transport_session* session ) {
 592         if( session == NULL ) { return 0; }
 593         tcp_send( session->sock_obj, "</stream:stream>");
 594         return tcp_disconnect( session->sock_obj );
 595 }
 596