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, const char* resource, int connect_timeout ) {
 135
 136         int size1 = 0;
 137         int size2 = 0;
 138
 139         if( ! session ) {
 140                 warning_handler( "session is null in connect" );
 141                 return 0;
 142         }
 143
 144
 145         /*
 146         session->state_machine->connected =
 147                 tcp_connected( session->sock_obj );
 148
 149         if( session->state_machine->connected ) {
 150                 return 1;
 151         }
 152         */
 153
 154
 155         char* server = session->sock_obj->server;
 156
 157         if( ! session->sock_obj ) {
 158                 return 0;
 159         }
 160
 161         if( ! session->sock_obj->connected ) {
 162                 if( ! tcp_connect( session->sock_obj ))
 163                         return 0;
 164         }
 165
 166         if( session->component ) {
 167
 168                 /* the first Jabber connect stanza */
 169                 char* our_hostname = getenv("HOSTNAME");
 170                 size1 = 150 + strlen( server );
 171                 char stanza1[ size1 ];
 172                 memset( stanza1, 0, size1 );
 173                 sprintf( stanza1,
 174                                 "<stream:stream version='1.0' xmlns:stream='http://etherx.jabber.org/streams' xmlns='jabber:component:accept' to='%s' from='%s' xml:lang='en'>",
 175                                 username, our_hostname );
 176
 177                 /* send the first stanze */
 178                 session->state_machine->connecting = CONNECTING_1;
 179                 if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 180                         warning_handler("error sending");
 181                         return 0;
 182                 }
 183
 184                 /* wait for reply */
 185                 tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 186
 187                 /* server acknowledges our existence, now see if we can login */
 188                 if( session->state_machine->connecting == CONNECTING_2 ) {
 189
 190                         int ss = session->session_id->n_used + strlen(password) + 5;
 191                         char hashstuff[ss];
 192                         memset(hashstuff,0,ss);
 193                         sprintf( hashstuff, "%s%s", session->session_id->buf, password );
 194
 195                         char* hash = shahash( hashstuff );
 196                         size2 = 100 + strlen( hash );
 197                         char stanza2[ size2 ];
 198                         memset( stanza2, 0, size2 );
 199                         sprintf( stanza2, "<handshake>%s</handshake>", hash );
 200
 201                         if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 202                                 warning_handler("error sending");
 203                                 return 0;
 204                         }
 205                 }
 206
 207         } else { /* we're not a component */
 208
 209                 /* the first Jabber connect stanza */
 210                 size1 = 100 + strlen( server );
 211                 char stanza1[ size1 ];
 212                 memset( stanza1, 0, size1 );
 213                 sprintf( stanza1,
 214                                 "<stream:stream to='%s' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams'>",
 215                         server );
 216
 217                 /* the second jabber connect stanza including login info*/
 218                 /* currently, we only support plain text login */
 219                 size2 = 150 + strlen( username ) + strlen(password) + strlen(resource);
 220                 char stanza2[ size2 ];
 221                 memset( stanza2, 0, size2 );
 222
 223                 sprintf( stanza2,
 224                                 "<iq id='123456789' type='set'><query xmlns='jabber:iq:auth'><username>%s</username><password>%s</password><resource>%s</resource></query></iq>",
 225                                 username, password, resource );
 226
 227
 228                 /* send the first stanze */
 229                 session->state_machine->connecting = CONNECTING_1;
 230                 if( ! tcp_send( session->sock_obj, stanza1 ) ) {
 231                         warning_handler("error sending");
 232                         return 0;
 233                 }
 234
 235                 /* wait for reply */
 236                 tcp_wait( session->sock_obj, connect_timeout ); /* make the timeout smarter XXX */
 237
 238                 /* server acknowledges our existence, now see if we can login */
 239                 if( session->state_machine->connecting == CONNECTING_2 ) {
 240                         if( ! tcp_send( session->sock_obj, stanza2 )  ) {
 241                                 warning_handler("error sending");
 242                                 return 0;
 243                         }
 244                 }
 245
 246         } // not component
 247
 248         /* wait for reply */
 249         tcp_wait( session->sock_obj, connect_timeout );
 250
 251
 252         if( session->state_machine->connected ) {
 253                 /* yar! */
 254                 return 1;
 255         }
 256
 257         return 0;
 258 }
 259
 260 // ---------------------------------------------------------------------------------
 261 // TCP data callback. Shove the data into the push parser.
 262 // ---------------------------------------------------------------------------------
 263 void grab_incoming( void * session, char* data ) {
 264         transport_session* ses = (transport_session*) session;
 265         if( ! ses ) { return; }
 266         xmlParseChunk(ses->parser_ctxt, data, strlen(data), 0);
 267 }
 268
 269
 270 void startElementHandler(
 271         void *session, const xmlChar *name, const xmlChar **atts) {
 272
 273         transport_session* ses = (transport_session*) session;
 274         if( ! ses ) { return; }
 275
 276
 277         if( strcmp( name, "message" ) == 0 ) {
 278                 ses->state_machine->in_message = 1;
 279                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 280                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 281                 buffer_add( ses->router_from_buffer, get_xml_attr( atts, "router_from" ) );
 282                 buffer_add( ses->router_to_buffer, get_xml_attr( atts, "router_to" ) );
 283                 buffer_add( ses->router_class_buffer, get_xml_attr( atts, "router_class" ) );
 284                 buffer_add( ses->router_command_buffer, get_xml_attr( atts, "router_command" ) );
 285                 char* broadcast = get_xml_attr( atts, "broadcast" );
 286                 if( broadcast )
 287                         ses->router_broadcast = atoi( broadcast );
 288
 289                 return;
 290         }
 291
 292         if( ses->state_machine->in_message ) {
 293
 294                 if( strcmp( name, "body" ) == 0 ) {
 295                         ses->state_machine->in_message_body = 1;
 296                         return;
 297                 }
 298
 299                 if( strcmp( name, "subject" ) == 0 ) {
 300                         ses->state_machine->in_subject = 1;
 301                         return;
 302                 }
 303
 304                 if( strcmp( name, "thread" ) == 0 ) {
 305                         ses->state_machine->in_thread = 1;
 306                         return;
 307                 }
 308
 309         }
 310
 311         if( strcmp( name, "presence" ) == 0 ) {
 312                 ses->state_machine->in_presence = 1;
 313                 buffer_add( ses->from_buffer, get_xml_attr( atts, "from" ) );
 314                 buffer_add( ses->recipient_buffer, get_xml_attr( atts, "to" ) );
 315                 return;
 316         }
 317
 318         if( strcmp( name, "status" ) == 0 ) {
 319                 ses->state_machine->in_status = 1;
 320                 return;
 321         }
 322
 323
 324         if( strcmp( name, "stream:error" ) == 0 ) {
 325                 ses->state_machine->in_error = 1;
 326                 warning_handler( "Received <stream:error> message from Jabber server" );
 327                 return;
 328         }
 329
 330
 331         /* first server response from a connect attempt */
 332         if( strcmp( name, "stream:stream" ) == 0 ) {
 333                 if( ses->state_machine->connecting == CONNECTING_1 ) {
 334                         ses->state_machine->connecting = CONNECTING_2;
 335                         buffer_add( ses->session_id, get_xml_attr(atts, "id") );
 336                 }
 337         }
 338
 339         if( strcmp( name, "handshake" ) == 0 ) {
 340                 ses->state_machine->connected = 1;
 341                 ses->state_machine->connecting = 0;
 342                 return;
 343         }
 344
 345
 346         if( strcmp( name, "error" ) == 0 ) {
 347                 ses->state_machine->in_message_error = 1;
 348                 buffer_add( ses->message_error_type, get_xml_attr( atts, "type" ) );
 349                 ses->message_error_code = atoi( get_xml_attr( atts, "code" ) );
 350                 warning_handler( "Received <error> message" );
 351                 return;
 352         }
 353
 354         if( strcmp( name, "iq" ) == 0 ) {
 355                 ses->state_machine->in_iq = 1;
 356
 357                 if( strcmp( get_xml_attr(atts, "type"), "result") == 0
 358                                 && ses->state_machine->connecting == CONNECTING_2 ) {
 359                         ses->state_machine->connected = 1;
 360                         ses->state_machine->connecting = 0;
 361                         return;
 362                 }
 363
 364                 if( strcmp( get_xml_attr(atts, "type"), "error") == 0 ) {
 365                         warning_handler( "Error connecting to jabber" );
 366                         return;
 367                 }
 368         }
 369 }
 370
 371 char* get_xml_attr( const xmlChar** atts, char* attr_name ) {
 372         int i;
 373         if (atts != NULL) {
 374                 for(i = 0;(atts[i] != NULL);i++) {
 375                         if( strcmp( atts[i++], attr_name ) == 0 ) {
 376                                 if( atts[i] != NULL ) {
 377                                         return (char*) atts[i];
 378                                 }
 379                         }
 380                 }
 381         }
 382         return NULL;
 383 }
 384
 385
 386 // ------------------------------------------------------------------
 387 // See which tags are ending
 388 // ------------------------------------------------------------------
 389 void endElementHandler( void *session, const xmlChar *name) {
 390         transport_session* ses = (transport_session*) session;
 391         if( ! ses ) { return; }
 392
 393         if( strcmp( name, "message" ) == 0 ) {
 394
 395                 /* pass off the message info the callback */
 396                 if( ses->message_callback ) {
 397
 398                         /* here it's ok to pass in the raw buffers because
 399                                 message_init allocates new space for the chars
 400                                 passed in */
 401                         transport_message* msg =  message_init(
 402                                 ses->body_buffer->buf,
 403                                 ses->subject_buffer->buf,
 404                                 ses->thread_buffer->buf,
 405                                 ses->recipient_buffer->buf,
 406                                 ses->from_buffer->buf );
 407
 408                         message_set_router_info( msg,
 409                                 ses->router_from_buffer->buf,
 410                                 ses->router_to_buffer->buf,
 411                                 ses->router_class_buffer->buf,
 412                                 ses->router_command_buffer->buf,
 413                                 ses->router_broadcast );
 414
 415                         if( ses->message_error_type->n_used > 0 ) {
 416                                 set_msg_error( msg, ses->message_error_type->buf, ses->message_error_code );
 417                         }
 418
 419                         if( msg == NULL ) { return; }
 420                         ses->message_callback( ses->user_data, msg );
 421                 }
 422
 423                 ses->state_machine->in_message = 0;
 424                 reset_session_buffers( session );
 425                 return;
 426         }
 427
 428         if( strcmp( name, "body" ) == 0 ) {
 429                 ses->state_machine->in_message_body = 0;
 430                 return;
 431         }
 432
 433         if( strcmp( name, "subject" ) == 0 ) {
 434                 ses->state_machine->in_subject = 0;
 435                 return;
 436         }
 437
 438         if( strcmp( name, "thread" ) == 0 ) {
 439                 ses->state_machine->in_thread = 0;
 440                 return;
 441         }
 442
 443         if( strcmp( name, "iq" ) == 0 ) {
 444                 ses->state_machine->in_iq = 0;
 445                 if( ses->message_error_code > 0 ) {
 446                         warning_handler( "Error in IQ packet: code %d",  ses->message_error_code );
 447                         warning_handler( "Error 401 means not authorized" );
 448                 }
 449                 reset_session_buffers( session );
 450                 return;
 451         }
 452
 453         if( strcmp( name, "presence" ) == 0 ) {
 454                 ses->state_machine->in_presence = 0;
 455                 /*
 456                 if( ses->presence_callback ) {
 457                         // call the callback with the status, etc.
 458                 }
 459                 */
 460                 reset_session_buffers( session );
 461                 return;
 462         }
 463
 464         if( strcmp( name, "status" ) == 0 ) {
 465                 ses->state_machine->in_status = 0;
 466                 return;
 467         }
 468
 469         if( strcmp( name, "error" ) == 0 ) {
 470                 ses->state_machine->in_message_error = 0;
 471                 return;
 472         }
 473
 474         if( strcmp( name, "error:error" ) == 0 ) {
 475                 ses->state_machine->in_error = 0;
 476                 return;
 477         }
 478 }
 479
 480 int reset_session_buffers( transport_session* ses ) {
 481         buffer_reset( ses->body_buffer );
 482         buffer_reset( ses->subject_buffer );
 483         buffer_reset( ses->thread_buffer );
 484         buffer_reset( ses->from_buffer );
 485         buffer_reset( ses->recipient_buffer );
 486         buffer_reset( ses->router_from_buffer );
 487         buffer_reset( ses->router_to_buffer );
 488         buffer_reset( ses->router_class_buffer );
 489         buffer_reset( ses->router_command_buffer );
 490         buffer_reset( ses->message_error_type );
 491         buffer_reset( ses->session_id );
 492
 493         return 1;
 494 }
 495
 496 // ------------------------------------------------------------------
 497 // takes data out of the body of the message and pushes it into
 498 // the appropriate buffer
 499 // ------------------------------------------------------------------
 500 void characterHandler(
 501                 void *session, const xmlChar *ch, int len) {
 502
 503         char data[len+1];
 504         memset( data, 0, len+1 );
 505         strncpy( data, (char*) ch, len );
 506         data[len] = 0;
 507
 508         //printf( "Handling characters: %s\n", data );
 509         transport_session* ses = (transport_session*) session;
 510         if( ! ses ) { return; }
 511
 512         /* set the various message parts */
 513         if( ses->state_machine->in_message ) {
 514
 515                 if( ses->state_machine->in_message_body ) {
 516                         buffer_add( ses->body_buffer, data );
 517                 }
 518
 519                 if( ses->state_machine->in_subject ) {
 520                         buffer_add( ses->subject_buffer, data );
 521                 }
 522
 523                 if( ses->state_machine->in_thread ) {
 524                         buffer_add( ses->thread_buffer, data );
 525                 }
 526         }
 527
 528         /* set the presence status */
 529         if( ses->state_machine->in_presence && ses->state_machine->in_status ) {
 530                 buffer_add( ses->status_buffer, data );
 531         }
 532
 533         if( ses->state_machine->in_error ) {
 534                 /* for now... */
 535                 warning_handler( "ERROR Xml fragment: %s\n", ch );
 536         }
 537
 538 }
 539
 540 /* XXX change to warning handlers */
 541 void  parseWarningHandler( void *session, const char* msg, ... ) {
 542
 543         va_list args;
 544         va_start(args, msg);
 545         fprintf(stdout, "WARNING");
 546         vfprintf(stdout, msg, args);
 547         va_end(args);
 548         fprintf(stderr, "XML WARNING: %s\n", msg );
 549 }
 550
 551 void  parseErrorHandler( void *session, const char* msg, ... ){
 552
 553         va_list args;
 554         va_start(args, msg);
 555         fprintf(stdout, "ERROR");
 556         vfprintf(stdout, msg, args);
 557         va_end(args);
 558         fprintf(stderr, "XML ERROR: %s\n", msg );
 559
 560 }
 561
 562 int session_disconnect( transport_session* session ) {
 563         if( session == NULL ) { return 0; }
 564         tcp_send( session->sock_obj, "</stream:stream>");
 565         return tcp_disconnect( session->sock_obj );
 566 }
 567