server/seshigh.c

   1 /*
   2  * Copyright (c) 1995-1999, Index Data
   3  * See the file LICENSE for details.
   4  * Sebastian Hammer, Adam Dickmeiss
   5  *
   6  * $Log: seshigh.c,v $
   7  * Revision 1.87  1999-03-31 11:18:25  adam
   8  * Implemented odr_strdup. Added Reference ID to backend server API.
   9  *
  10  * Revision 1.86  1999/02/02 13:57:38  adam
  11  * Uses preprocessor define WIN32 instead of WINDOWS to build code
  12  * for Microsoft WIN32.
  13  *
  14  * Revision 1.85  1998/11/17 09:52:59  adam
  15  * Fixed minor bug (introduced by previous commit).
  16  *
  17  * Revision 1.84  1998/11/16 16:02:32  adam
  18  * Added loggin utilies, log_rpn_query and log_scan_term. These used
  19  * to be part of Zebra.
  20  *
  21  * Revision 1.83  1998/11/03 10:09:36  adam
  22  * Fixed bug regarding YC.
  23  *
  24  * Revision 1.82  1998/10/20 14:00:30  quinn
  25  * Fixed Scan
  26  *
  27  * Revision 1.81  1998/10/13 16:12:24  adam
  28  * Added support for Surrogate Diagnostics for Scan Term entries.
  29  *
  30  * Revision 1.80  1998/09/02 12:41:53  adam
  31  * Added decode stream in bend search structures.
  32  *
  33  * Revision 1.79  1998/08/19 16:10:08  adam
  34  * Changed som member names of DeleteResultSetRequest/Response.
  35  *
  36  * Revision 1.78  1998/08/03 10:23:55  adam
  37  * Fixed bug regarding Options for Sort.
  38  *
  39  * Revision 1.77  1998/07/20 12:38:42  adam
  40  * Implemented delete result set service to server API.
  41  *
  42  * Revision 1.76  1998/05/27 16:57:07  adam
  43  * Support for surrogate diagnostic records added for bend_fetch.
  44  *
  45  * Revision 1.75  1998/05/18 10:13:07  adam
  46  * Fixed call to es_request handler - extra argument was passed.
  47  *
  48  * Revision 1.74  1998/03/31 15:13:20  adam
  49  * Development towards compiled ASN.1.
  50  *
  51  * Revision 1.73  1998/03/31 11:07:45  adam
  52  * Furhter work on UNIverse resource report.
  53  * Added Extended Services handling in frontend server.
  54  *
  55  * Revision 1.72  1998/02/11 11:53:35  adam
  56  * Changed code so that it compiles as C++.
  57  *
  58  * Revision 1.71  1998/02/10 11:03:57  adam
  59  * Added support for extended handlers in backend server interface.
  60  *
  61  * Revision 1.70  1998/01/29 13:15:35  adam
  62  * Implemented sort for the backend interface.
  63  *
  64  * Revision 1.69  1997/09/30 11:48:12  adam
  65  * Fixed bug introduced by previous commit.
  66  *
  67  * Revision 1.68  1997/09/29 13:18:59  adam
  68  * Added function, oid_ent_to_oid, to replace the function
  69  * oid_getoidbyent, which is not thread safe.
  70  *
  71  * Revision 1.67  1997/09/17 12:10:40  adam
  72  * YAZ version 1.4.
  73  *
  74  * Revision 1.66  1997/09/05 15:26:44  adam
  75  * Added ODR encode in search and scen bend request structures.
  76  * Fixed a few enums that caused trouble with C++.
  77  *
  78  * Revision 1.65  1997/09/01 08:53:01  adam
  79  * New windows NT/95 port using MSV5.0. The test server 'ztest' was
  80  * moved a separate directory. MSV5.0 project server.dsp created.
  81  * As an option, the server can now operate as an NT service.
  82  *
  83  * Revision 1.64  1997/04/30 08:52:11  quinn
  84  * Null
  85  *
  86  * Revision 1.63  1996/10/11  11:57:26  quinn
  87  * Smallish
  88  *
  89  * Revision 1.62  1996/07/06  19:58:35  quinn
  90  * System headerfiles gathered in yconfig
  91  *
  92  * Revision 1.61  1996/06/10  08:56:16  quinn
  93  * Work on Summary.
  94  *
  95  * Revision 1.60  1996/05/30  11:03:10  quinn
  96  * Fixed NextresultSetPosition bug fixed.
  97  *
  98  * Revision 1.59  1996/05/14  09:26:46  quinn
  99  * Added attribute set to scan backend
 100  *
 101  * Revision 1.58  1996/02/20  12:53:04  quinn
 102  * Chanes to SCAN
 103  *
 104  * Revision 1.57  1996/01/02  08:57:47  quinn
 105  * Changed enums in the ASN.1 .h files to #defines. Changed oident.class to oclass
 106  *
 107  * Revision 1.56  1995/12/14  11:09:57  quinn
 108  * Work on Explain
 109  *
 110  * Revision 1.55  1995/11/08  17:41:37  quinn
 111  * Smallish.
 112  *
 113  * Revision 1.54  1995/11/08  15:11:29  quinn
 114  * Log of close transmit.
 115  *
 116  * Revision 1.53  1995/11/01  13:54:58  quinn
 117  * Minor adjustments
 118  *
 119  * Revision 1.52  1995/11/01  12:19:13  quinn
 120  * Second attempt to fix same bug.
 121  *
 122  * Revision 1.50  1995/10/25  16:58:32  quinn
 123  * Simple.
 124  *
 125  * Revision 1.49  1995/10/16  13:51:53  quinn
 126  * Changes to provide Especs to the backend.
 127  *
 128  * Revision 1.48  1995/10/06  08:51:20  quinn
 129  * Added Write-buffer.
 130  *
 131  * Revision 1.47  1995/08/29  14:24:16  quinn
 132  * Added second half of close-handshake
 133  *
 134  * Revision 1.46  1995/08/29  11:17:58  quinn
 135  * Added code to receive close
 136  *
 137  * Revision 1.45  1995/08/21  09:11:00  quinn
 138  * Smallish fixes to suppport new formats.
 139  *
 140  * Revision 1.44  1995/08/17  12:45:25  quinn
 141  * Fixed minor problems with GRS-1. Added support in c&s.
 142  *
 143  * Revision 1.43  1995/08/15  12:00:31  quinn
 144  * Updated External
 145  *
 146  * Revision 1.42  1995/08/15  11:16:50  quinn
 147  *
 148  * Revision 1.41  1995/08/02  10:23:06  quinn
 149  * Smallish
 150  *
 151  * Revision 1.40  1995/07/31  14:34:26  quinn
 152  * Fixed bug in process_searchResponse (numberOfRecordsReturned).
 153  *
 154  * Revision 1.39  1995/06/27  13:21:00  quinn
 155  * SUTRS support
 156  *
 157  * Revision 1.38  1995/06/19  12:39:11  quinn
 158  * Fixed bug in timeout code. Added BER dumper.
 159  *
 160  * Revision 1.37  1995/06/16  13:16:14  quinn
 161  * Fixed Defaultdiagformat.
 162  *
 163  * Revision 1.36  1995/06/16  10:31:36  quinn
 164  * Added session timeout.
 165  *
 166  * Revision 1.35  1995/06/15  07:45:14  quinn
 167  * Moving to v3.
 168  *
 169  * Revision 1.34  1995/06/14  15:26:46  quinn
 170  * *** empty log message ***
 171  *
 172  * Revision 1.33  1995/06/06  14:57:05  quinn
 173  * Better diagnostics.
 174  *
 175  * Revision 1.32  1995/06/06  08:41:44  quinn
 176  * Better diagnostics.
 177  *
 178  * Revision 1.31  1995/06/06  08:15:37  quinn
 179  * Cosmetic.
 180  *
 181  * Revision 1.30  1995/06/05  10:53:32  quinn
 182  * Added a better SCAN.
 183  *
 184  * Revision 1.29  1995/06/01  11:25:03  quinn
 185  * Smallish.
 186  *
 187  * Revision 1.28  1995/06/01  11:21:01  quinn
 188  * Attempting to fix a bug in pack-records. replaced break with continue
 189  * for large records, according to standard.
 190  *
 191  * Revision 1.27  1995/05/29  08:12:06  quinn
 192  * Moved oid to util
 193  *
 194  * Revision 1.26  1995/05/18  13:02:12  quinn
 195  * Smallish.
 196  *
 197  * Revision 1.25  1995/05/17  08:42:26  quinn
 198  * Transfer auth info to backend. Allow backend to reject init gracefully.
 199  *
 200  * Revision 1.24  1995/05/16  08:51:04  quinn
 201  * License, documentation, and memory fixes
 202  *
 203  * Revision 1.23  1995/05/15  13:25:10  quinn
 204  * Fixed memory bug.
 205  *
 206  * Revision 1.22  1995/05/15  11:56:39  quinn
 207  * Asynchronous facilities. Restructuring of seshigh code.
 208  *
 209  * Revision 1.21  1995/05/02  08:53:19  quinn
 210  * Trying in vain to fix comm with ISODE
 211  *
 212  * Revision 1.20  1995/04/20  15:13:00  quinn
 213  * Cosmetic
 214  *
 215  * Revision 1.19  1995/04/18  08:15:34  quinn
 216  * Added dynamic memory allocation on encoding (whew). Code is now somewhat
 217  * neater. We'll make the same change for decoding one day.
 218  *
 219  * Revision 1.18  1995/04/17  11:28:25  quinn
 220  * Smallish
 221  *
 222  * Revision 1.17  1995/04/10  10:23:36  quinn
 223  * Some work to add scan and other things.
 224  *
 225  * Revision 1.16  1995/03/31  09:18:55  quinn
 226  * Added logging.
 227  *
 228  * Revision 1.15  1995/03/30  14:03:23  quinn
 229  * Added RFC1006 as separate library
 230  *
 231  * Revision 1.14  1995/03/30  12:18:17  quinn
 232  * Fixed bug.
 233  *
 234  * Revision 1.13  1995/03/30  09:09:24  quinn
 235  * Added state-handle and some support for asynchronous activities.
 236  *
 237  * Revision 1.12  1995/03/29  15:40:16  quinn
 238  * Ongoing work. Statserv is now dynamic by default
 239  *
 240  * Revision 1.11  1995/03/28  09:16:21  quinn
 241  * Added record packing to the search request
 242  *
 243  * Revision 1.10  1995/03/27  08:34:24  quinn
 244  * Added dynamic server functionality.
 245  * Released bindings to session.c (is now redundant)
 246  *
 247  * Revision 1.9  1995/03/22  15:01:26  quinn
 248  * Adjusting record packing.
 249  *
 250  * Revision 1.8  1995/03/22  10:13:21  quinn
 251  * Working on record packer
 252  *
 253  * Revision 1.7  1995/03/21  15:53:31  quinn
 254  * Little changes.
 255  *
 256  * Revision 1.6  1995/03/21  12:30:09  quinn
 257  * Beginning to add support for record packing.
 258  *
 259  * Revision 1.5  1995/03/17  10:44:13  quinn
 260  * Added catch of null-string in makediagrec
 261  *
 262  * Revision 1.4  1995/03/17  10:18:08  quinn
 263  * Added memory management.
 264  *
 265  * Revision 1.3  1995/03/16  17:42:39  quinn
 266  * Little changes
 267  *
 268  * Revision 1.2  1995/03/16  13:29:01  quinn
 269  * Partitioned server.
 270  *
 271  * Revision 1.1  1995/03/15  16:02:10  quinn
 272  * Modded session.c to seshigh.c
 273  *
 274  */
 275
 276 /*
 277  * Frontend server logic.
 278  *
 279  * This code receives incoming APDUs, and handles client requests by means
 280  * of the backend API.
 281  *
 282  * Some of the code is getting quite involved, compared to simpler servers -
 283  * primarily because it is asynchronous both in the communication with
 284  * the user and the backend. We think the complexity will pay off in
 285  * the form of greater flexibility when more asynchronous facilities
 286  * are implemented.
 287  *
 288  * Memory management has become somewhat involved. In the simple case, where
 289  * only one PDU is pending at a time, it will simply reuse the same memory,
 290  * once it has found its working size. When we enable multiple concurrent
 291  * operations, perhaps even with multiple parallel calls to the backend, it
 292  * will maintain a pool of buffers for encoding and decoding, trying to
 293  * minimize memory allocation/deallocation during normal operation.
 294  *
 295  * TODOs include (and will be done in order of public interest):
 296  *
 297  * Support for EXPLAIN - provide simple meta-database system.
 298  * Support for access control.
 299  * Support for resource control.
 300  * Support for extended services - primarily Item Order.
 301  * Rest of Z39.50-1994
 302  *
 303  */
 304
 305 #include <yconfig.h>
 306 #include <stdlib.h>
 307 #include <stdio.h>
 308 #ifdef WIN32
 309 #include <process.h>
 310 #else
 311 #include <unistd.h>
 312 #endif
 313 #include <assert.h>
 314
 315 #include <xmalloc.h>
 316 #include <comstack.h>
 317 #include "eventl.h"
 318 #include "session.h"
 319 #include <proto.h>
 320 #include <oid.h>
 321 #include <log.h>
 322 #include <logrpn.h>
 323 #include <statserv.h>
 324
 325 #include <backend.h>
 326
 327 static int process_request(association *assoc, request *req);
 328 void backend_response(IOCHAN i, int event);
 329 static int process_response(association *assoc, request *req, Z_APDU *res);
 330 static Z_APDU *process_initRequest(association *assoc, request *reqb);
 331 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
 332     int *fd);
 333 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
 334     bend_search_rr *bsrr, int *fd);
 335 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
 336     int *fd);
 337 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
 338 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
 339 static void process_close(association *assoc, request *reqb);
 340 void save_referenceId (request *reqb, Z_ReferenceId *refid);
 341 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
 342     int *fd);
 343
 344 static FILE *apduf = 0; /* for use in static mode */
 345 static statserv_options_block *control_block = 0;
 346
 347 /* Chas: Added in from DALI */
 348 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 349 /* Chas: End of addition from DALI */
 350
 351 /*
 352  * Create and initialize a new association-handle.
 353  *  channel  : iochannel for the current line.
 354  *  link     : communications channel.
 355  * Returns: 0 or a new association handle.
 356  */
 357 association *create_association(IOCHAN channel, COMSTACK link)
 358 {
 359     association *anew;
 360
 361     if (!control_block)
 362         control_block = statserv_getcontrol();
 363     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 364         return 0;
 365     anew->client_chan = channel;
 366     anew->client_link = link;
 367     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 368         !(anew->encode = odr_createmem(ODR_ENCODE)))
 369         return 0;
 370     if (*control_block->apdufile)
 371     {
 372         char filename[256];
 373         FILE *f;
 374
 375         strcpy(filename, control_block->apdufile);
 376         if (!(anew->print = odr_createmem(ODR_PRINT)))
 377             return 0;
 378         if (*control_block->apdufile != '-')
 379         {
 380             strcpy(filename, control_block->apdufile);
 381             if (!control_block->dynamic)
 382             {
 383                 if (!apduf)
 384                 {
 385                     if (!(apduf = fopen(filename, "w")))
 386                     {
 387                         logf(LOG_WARN|LOG_ERRNO, "%s", filename);
 388                         return 0;
 389                     }
 390                     setvbuf(apduf, 0, _IONBF, 0);
 391                 }
 392                 f = apduf;
 393             }
 394             else
 395             {
 396                 sprintf(filename + strlen(filename), ".%d", getpid());
 397                 if (!(f = fopen(filename, "w")))
 398                 {
 399                     logf(LOG_WARN|LOG_ERRNO, "%s", filename);
 400                     return 0;
 401                 }
 402                 setvbuf(f, 0, _IONBF, 0);
 403             }
 404             odr_setprint(anew->print, f);
 405         }
 406     }
 407     else
 408         anew->print = 0;
 409     anew->input_buffer = 0;
 410     anew->input_buffer_len = 0;
 411     anew->backend = 0;
 412     anew->state = ASSOC_NEW;
 413     request_initq(&anew->incoming);
 414     request_initq(&anew->outgoing);
 415     anew->proto = cs_getproto(link);
 416     return anew;
 417 }
 418
 419 /*
 420  * Free association and release resources.
 421  */
 422 void destroy_association(association *h)
 423 {
 424     odr_destroy(h->decode);
 425     odr_destroy(h->encode);
 426     if (h->print)
 427         odr_destroy(h->print);
 428     if (h->input_buffer)
 429     xfree(h->input_buffer);
 430     if (h->backend)
 431         bend_close(h->backend);
 432     while (request_deq(&h->incoming));
 433     while (request_deq(&h->outgoing));
 434     request_delq(&h->incoming);
 435     request_delq(&h->outgoing);
 436     xfree(h);
 437 }
 438
 439 static void do_close_req(association *a, int reason, char *message,
 440                          request *req)
 441 {
 442     Z_APDU apdu;
 443     Z_Close *cls = zget_Close(a->encode);
 444
 445     /* Purge request queue */
 446     while (request_deq(&a->incoming));
 447     while (request_deq(&a->outgoing));
 448     if (a->version >= 3)
 449     {
 450         logf(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
 451             reason, message ? message : "none");
 452         apdu.which = Z_APDU_close;
 453         apdu.u.close = cls;
 454         *cls->closeReason = reason;
 455         cls->diagnosticInformation = message;
 456         process_response(a, req, &apdu);
 457         iochan_settimeout(a->client_chan, 60);
 458     }
 459     else
 460     {
 461         logf(LOG_DEBUG, "v2 client. No Close PDU");
 462         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 463     }
 464     a->state = ASSOC_DEAD;
 465 }
 466
 467 static void do_close(association *a, int reason, char *message)
 468 {
 469     do_close_req (a, reason, message, request_get(&a->outgoing));
 470 }
 471
 472 /*
 473  * This is where PDUs from the client are read and the further
 474  * processing is initiated. Flow of control moves down through the
 475  * various process_* functions below, until the encoded result comes back up
 476  * to the output handler in here.
 477  *
 478  *  h     : the I/O channel that has an outstanding event.
 479  *  event : the current outstanding event.
 480  */
 481 void ir_session(IOCHAN h, int event)
 482 {
 483     int res;
 484     association *assoc = (association *)iochan_getdata(h);
 485     COMSTACK conn = assoc->client_link;
 486     request *req;
 487
 488     assert(h && conn && assoc);
 489     if (event == EVENT_TIMEOUT)
 490     {
 491         if (assoc->state != ASSOC_UP)
 492         {
 493             logf(LOG_LOG, "Final timeout - closing connection.");
 494             cs_close(conn);
 495             destroy_association(assoc);
 496             iochan_destroy(h);
 497         }
 498         else
 499         {
 500             logf(LOG_LOG, "Session idle too long. Sending close.");
 501             do_close(assoc, Z_Close_lackOfActivity, 0);
 502         }
 503         return;
 504     }
 505     if (event & EVENT_INPUT || event & EVENT_WORK) /* input */
 506     {
 507         if (event & EVENT_INPUT)
 508         {
 509             logf(LOG_DEBUG, "ir_session (input)");
 510             assert(assoc && conn);
 511             /* We aren't speaking to this fellow */
 512             if (assoc->state == ASSOC_DEAD)
 513             {
 514                 logf(LOG_LOG, "Closed connection after reject");
 515                 cs_close(conn);
 516                 destroy_association(assoc);
 517                 iochan_destroy(h);
 518                 return;
 519             }
 520             if ((res = cs_get(conn, &assoc->input_buffer,
 521                 &assoc->input_buffer_len)) <= 0)
 522             {
 523                 logf(LOG_LOG, "Connection closed by client");
 524                 cs_close(conn);
 525                 destroy_association(assoc);
 526                 iochan_destroy(h);
 527                 return;
 528             }
 529             else if (res == 1) /* incomplete read - wait for more  */
 530                 return;
 531             if (cs_more(conn)) /* more stuff - call us again later, please */
 532                 iochan_setevent(h, EVENT_INPUT);
 533
 534             /* we got a complete PDU. Let's decode it */
 535             logf(LOG_DEBUG, "Got PDU, %d bytes", res);
 536             req = request_get(&assoc->incoming); /* get a new request structure */
 537             odr_reset(assoc->decode);
 538             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 539             if (!z_APDU(assoc->decode, &req->request, 0))
 540             {
 541                 logf(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ",
 542                     odr_errmsg(odr_geterror(assoc->decode)),
 543                     odr_offset(assoc->decode));
 544                 logf(LOG_LOG, "PDU dump:");
 545                 odr_dumpBER(log_file(), assoc->input_buffer, res);
 546                 do_close(assoc, Z_Close_protocolError, "Malformed package");
 547                 return;
 548             }
 549             req->request_mem = odr_extract_mem(assoc->decode);
 550             if (assoc->print && !z_APDU(assoc->print, &req->request, 0))
 551             {
 552                 logf(LOG_WARN, "ODR print error: %s",
 553                     odr_errmsg(odr_geterror(assoc->print)));
 554                 odr_reset(assoc->print);
 555             }
 556             request_enq(&assoc->incoming, req);
 557         }
 558
 559         /* can we do something yet? */
 560         req = request_head(&assoc->incoming);
 561         if (req->state == REQUEST_IDLE)
 562         {
 563             request_deq(&assoc->incoming);
 564             if (process_request(assoc, req) < 0)
 565                 do_close_req(assoc, Z_Close_systemProblem, "Unknown error",
 566                              req);
 567         }
 568     }
 569     if (event & EVENT_OUTPUT)
 570     {
 571         request *req = request_head(&assoc->outgoing);
 572
 573         logf(LOG_DEBUG, "ir_session (output)");
 574         req->state = REQUEST_PENDING;
 575         switch (res = cs_put(conn, req->response, req->len_response))
 576         {
 577             case -1:
 578                 logf(LOG_LOG, "Connection closed by client");
 579                 cs_close(conn);
 580                 destroy_association(assoc);
 581                 iochan_destroy(h);
 582                 break;
 583             case 0: /* all sent - release the request structure */
 584                 logf(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 585                 nmem_destroy(req->request_mem);
 586                 request_deq(&assoc->outgoing);
 587                 request_release(req);
 588                 if (!request_head(&assoc->outgoing))
 589                     iochan_clearflag(h, EVENT_OUTPUT);
 590                 break;
 591             /* value of 1 -- partial send -- is simply ignored */
 592         }
 593     }
 594     if (event & EVENT_EXCEPT)
 595     {
 596         logf(LOG_DEBUG, "ir_session (exception)");
 597         cs_close(conn);
 598         destroy_association(assoc);
 599         iochan_destroy(h);
 600     }
 601 }
 602
 603 /*
 604  * Initiate request processing.
 605  */
 606 static int process_request(association *assoc, request *req)
 607 {
 608     int fd = -1;
 609     Z_APDU *res;
 610     int retval;
 611
 612     assert(req && req->state == REQUEST_IDLE);
 613     switch (req->request->which)
 614     {
 615         case Z_APDU_initRequest:
 616             res = process_initRequest(assoc, req); break;
 617         case Z_APDU_searchRequest:
 618             res = process_searchRequest(assoc, req, &fd); break;
 619         case Z_APDU_presentRequest:
 620             res = process_presentRequest(assoc, req, &fd); break;
 621         case Z_APDU_scanRequest:
 622             res = process_scanRequest(assoc, req, &fd); break;
 623         case Z_APDU_extendedServicesRequest:
 624             if (assoc->bend_esrequest)
 625                 res = process_ESRequest(assoc, req, &fd);
 626             else
 627             {
 628                 logf(LOG_WARN, "Cannot handle EXTENDED SERVICES APDU");
 629                 return -1;
 630             }
 631             break;
 632         case Z_APDU_sortRequest:
 633             if (assoc->bend_sort)
 634                 res = process_sortRequest(assoc, req, &fd);
 635             else
 636             {
 637                 logf(LOG_WARN, "Cannot handle SORT APDU");
 638                 return -1;
 639             }
 640             break;
 641         case Z_APDU_close:
 642             process_close(assoc, req); return 0;
 643         case Z_APDU_deleteResultSetRequest:
 644             if (assoc->bend_delete)
 645                 res = process_deleteRequest(assoc, req, &fd);
 646             else
 647             {
 648                 logf (LOG_WARN, "Cannot handle Delete APDU");
 649                 return -1;
 650             }
 651             break;
 652         default:
 653             logf(LOG_WARN, "Bad APDU received");
 654             return -1;
 655     }
 656     if (res)
 657     {
 658         logf(LOG_DEBUG, "  result immediately available");
 659         retval = process_response(assoc, req, res);
 660     }
 661     else if (fd < 0)
 662     {
 663         logf(LOG_DEBUG, "  result unavailble");
 664         retval = 0;
 665     }
 666     else /* no result yet - one will be provided later */
 667     {
 668         IOCHAN chan;
 669
 670         /* Set up an I/O handler for the fd supplied by the backend */
 671
 672         logf(LOG_DEBUG, "   establishing handler for result");
 673         req->state = REQUEST_PENDING;
 674         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
 675             abort();
 676         iochan_setdata(chan, assoc);
 677         retval = 0;
 678     }
 679     return retval;
 680 }
 681
 682 /*
 683  * Handle message from the backend.
 684  */
 685 void backend_response(IOCHAN i, int event)
 686 {
 687     association *assoc = (association *)iochan_getdata(i);
 688     request *req = request_head(&assoc->incoming);
 689     Z_APDU *res;
 690     int fd;
 691
 692     logf(LOG_DEBUG, "backend_response");
 693     assert(assoc && req && req->state != REQUEST_IDLE);
 694     /* determine what it is we're waiting for */
 695     switch (req->request->which)
 696     {
 697         case Z_APDU_searchRequest:
 698             res = response_searchRequest(assoc, req, 0, &fd); break;
 699 #if 0
 700         case Z_APDU_presentRequest:
 701             res = response_presentRequest(assoc, req, 0, &fd); break;
 702         case Z_APDU_scanRequest:
 703             res = response_scanRequest(assoc, req, 0, &fd); break;
 704 #endif
 705         default:
 706             logf(LOG_WARN, "Serious programmer's lapse or bug");
 707             abort();
 708     }
 709     if ((res && process_response(assoc, req, res) < 0) || fd < 0)
 710     {
 711         logf(LOG_LOG, "Fatal error when talking to backend");
 712         do_close(assoc, Z_Close_systemProblem, 0);
 713         iochan_destroy(i);
 714         return;
 715     }
 716     else if (!res) /* no result yet - try again later */
 717     {
 718         logf(LOG_DEBUG, "   no result yet");
 719         iochan_setfd(i, fd); /* in case fd has changed */
 720     }
 721 }
 722
 723 /*
 724  * Encode response, and transfer the request structure to the outgoing queue.
 725  */
 726 static int process_response(association *assoc, request *req, Z_APDU *res)
 727 {
 728     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
 729     if (!z_APDU(assoc->encode, &res, 0))
 730     {
 731         logf(LOG_WARN, "ODR error when encoding response: %s",
 732             odr_errmsg(odr_geterror(assoc->decode)));
 733         odr_reset(assoc->encode);
 734         return -1;
 735     }
 736     req->response = odr_getbuf(assoc->encode, &req->len_response,
 737         &req->size_response);
 738     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
 739     if (assoc->print && !z_APDU(assoc->print, &res, 0))
 740     {
 741         logf(LOG_WARN, "ODR print error: %s",
 742             odr_errmsg(odr_geterror(assoc->print)));
 743         odr_reset(assoc->print);
 744     }
 745     odr_reset(assoc->encode);
 746     req->state = REQUEST_IDLE;
 747     request_enq(&assoc->outgoing, req);
 748     /* turn the work over to the ir_session handler */
 749     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
 750     /* Is there more work to be done? give that to the input handler too */
 751 #if 1
 752     if (request_head(&assoc->incoming))
 753     {
 754         logf (LOG_DEBUG, "more work to be done");
 755         iochan_setevent(assoc->client_chan, EVENT_WORK);
 756     }
 757 #endif
 758     return 0;
 759 }
 760
 761 /*
 762  * Handle init request.
 763  * At the moment, we don't check the options
 764  * anywhere else in the code - we just try not to do anything that would
 765  * break a naive client. We'll toss 'em into the association block when
 766  * we need them there.
 767  */
 768 static Z_APDU *process_initRequest(association *assoc, request *reqb)
 769 {
 770     Z_InitRequest *req = reqb->request->u.initRequest;
 771     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
 772     Z_InitResponse *resp = apdu->u.initResponse;
 773     bend_initrequest binitreq;
 774     bend_initresult *binitres;
 775     char options[100];
 776
 777     logf(LOG_LOG, "Got initRequest");
 778     if (req->implementationId)
 779         logf(LOG_LOG, "Id:        %s", req->implementationId);
 780     if (req->implementationName)
 781         logf(LOG_LOG, "Name:      %s", req->implementationName);
 782     if (req->implementationVersion)
 783         logf(LOG_LOG, "Version:   %s", req->implementationVersion);
 784
 785     binitreq.stream = assoc->encode;
 786     binitreq.configname = "default-config";
 787     binitreq.auth = req->idAuthentication;
 788     binitreq.referenceId = req->referenceId;
 789     binitreq.bend_sort = NULL;
 790     binitreq.bend_search = NULL;
 791     binitreq.bend_present = NULL;
 792     binitreq.bend_esrequest = NULL;
 793     binitreq.bend_delete = NULL;
 794     if (!(binitres = bend_init(&binitreq)))
 795     {
 796         logf(LOG_WARN, "Bad response from backend.");
 797         return 0;
 798     }
 799
 800     assoc->backend = binitres->handle;
 801     if ((assoc->bend_sort = (int (*)())binitreq.bend_sort))
 802         logf (LOG_DEBUG, "Sort handler installed");
 803     if ((assoc->bend_search = (int (*)())binitreq.bend_search))
 804         logf (LOG_DEBUG, "Search handler installed");
 805     if ((assoc->bend_present = (int (*)())binitreq.bend_present))
 806         logf (LOG_DEBUG, "Present handler installed");
 807     if ((assoc->bend_esrequest = (int (*)())binitreq.bend_esrequest))
 808         logf (LOG_DEBUG, "ESRequest handler installed");
 809     if ((assoc->bend_delete = (int (*)())binitreq.bend_delete))
 810         logf (LOG_DEBUG, "Delete handler installed");
 811
 812     resp->referenceId = req->referenceId;
 813     *options = '\0';
 814     /* let's tell the client what we can do */
 815     if (ODR_MASK_GET(req->options, Z_Options_search))
 816     {
 817         ODR_MASK_SET(resp->options, Z_Options_search);
 818         strcat(options, "srch");
 819     }
 820     if (ODR_MASK_GET(req->options, Z_Options_present))
 821     {
 822         ODR_MASK_SET(resp->options, Z_Options_present);
 823         strcat(options, " prst");
 824     }
 825     if (ODR_MASK_GET(req->options, Z_Options_delSet) && binitreq.bend_delete)
 826     {
 827         ODR_MASK_SET(resp->options, Z_Options_delSet);
 828         strcat(options, " del");
 829     }
 830     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
 831         binitreq.bend_esrequest)
 832     {
 833         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
 834         strcat (options, " extendedServices");
 835     }
 836     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
 837     {
 838         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
 839         strcat(options, " namedresults");
 840     }
 841     if (ODR_MASK_GET(req->options, Z_Options_scan))
 842     {
 843         ODR_MASK_SET(resp->options, Z_Options_scan);
 844         strcat(options, " scan");
 845     }
 846     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
 847     {
 848         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
 849         strcat(options, " concurop");
 850     }
 851     if (ODR_MASK_GET(req->options, Z_Options_sort) && binitreq.bend_sort)
 852     {
 853         ODR_MASK_SET(resp->options, Z_Options_sort);
 854         strcat(options, " sort");
 855     }
 856     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
 857     {
 858         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
 859         assoc->version = 2; /* 1 & 2 are equivalent */
 860     }
 861     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
 862     {
 863         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
 864         assoc->version = 2;
 865     }
 866     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
 867     {
 868         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
 869         assoc->version = 3;
 870     }
 871     logf(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
 872     assoc->maximumRecordSize = *req->maximumRecordSize;
 873     if (assoc->maximumRecordSize > control_block->maxrecordsize)
 874         assoc->maximumRecordSize = control_block->maxrecordsize;
 875     assoc->preferredMessageSize = *req->preferredMessageSize;
 876     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
 877         assoc->preferredMessageSize = assoc->maximumRecordSize;
 878     resp->preferredMessageSize = &assoc->preferredMessageSize;
 879     resp->maximumRecordSize = &assoc->maximumRecordSize;
 880     resp->implementationName = "Index Data/YAZ Generic Frontend Server";
 881     if (binitres->errcode)
 882     {
 883         logf(LOG_LOG, "Connection rejected by backend.");
 884         *resp->result = 0;
 885         assoc->state = ASSOC_DEAD;
 886     }
 887     else
 888         assoc->state = ASSOC_UP;
 889     return apdu;
 890 }
 891
 892 /*
 893  * These functions should be merged.
 894  */
 895
 896 static void set_addinfo (Z_DefaultDiagFormat *dr, char *addinfo)
 897 {
 898 #if ASN_COMPILED
 899     dr->which = Z_DefaultDiagFormat_v2Addinfo;
 900     dr->u.v2Addinfo = addinfo ? addinfo : "";
 901 #else
 902     dr->which = Z_DiagForm_v2AddInfo;
 903     dr->addinfo = addinfo ? addinfo : "";
 904 #endif
 905 }
 906
 907 /*
 908  * nonsurrogate diagnostic record.
 909  */
 910 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
 911 {
 912     int oid[OID_SIZE];
 913     Z_Records *rec = (Z_Records *)
 914         odr_malloc (assoc->encode, sizeof(*rec));
 915     oident bib1;
 916     int *err = (int *)
 917         odr_malloc (assoc->encode, sizeof(*err));
 918     Z_DiagRec *drec = (Z_DiagRec *)
 919         odr_malloc (assoc->encode, sizeof(*drec));
 920     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
 921         odr_malloc (assoc->encode, sizeof(*dr));
 922
 923     bib1.proto = assoc->proto;
 924     bib1.oclass = CLASS_DIAGSET;
 925     bib1.value = VAL_BIB1;
 926
 927     logf(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo :
 928         "NULL");
 929     *err = error;
 930     rec->which = Z_Records_NSD;
 931 #if ASN_COMPILED
 932     rec->u.nonSurrogateDiagnostic = dr;
 933 #else
 934 #ifdef Z_95
 935     rec->u.nonSurrogateDiagnostic = drec;
 936     drec->which = Z_DiagRec_defaultFormat;
 937     drec->u.defaultFormat = dr;
 938 #else
 939     rec->u.nonSurrogateDiagnostic = dr;
 940 #endif
 941 #endif
 942     dr->diagnosticSetId = odr_oiddup (assoc->encode,
 943                                       oid_ent_to_oid(&bib1, oid));
 944     dr->condition = err;
 945     set_addinfo (dr, addinfo);
 946     return rec;
 947 }
 948
 949 /*
 950  * surrogate diagnostic.
 951  */
 952 static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname,
 953                                           int error, char *addinfo)
 954 {
 955     int oid[OID_SIZE];
 956     Z_NamePlusRecord *rec = (Z_NamePlusRecord *)odr_malloc (assoc->encode, sizeof(*rec));
 957     int *err = (int *)odr_malloc (assoc->encode, sizeof(*err));
 958     oident bib1;
 959     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
 960     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)odr_malloc (assoc->encode, sizeof(*dr));
 961
 962     bib1.proto = assoc->proto;
 963     bib1.oclass = CLASS_DIAGSET;
 964     bib1.value = VAL_BIB1;
 965
 966     logf(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
 967     *err = error;
 968     rec->databaseName = dbname;
 969     rec->which = Z_NamePlusRecord_surrogateDiagnostic;
 970     rec->u.surrogateDiagnostic = drec;
 971     drec->which = Z_DiagRec_defaultFormat;
 972     drec->u.defaultFormat = dr;
 973     dr->diagnosticSetId = odr_oiddup (assoc->encode,
 974                                       oid_ent_to_oid(&bib1, oid));
 975     dr->condition = err;
 976     set_addinfo (dr, addinfo);
 977
 978     return rec;
 979 }
 980
 981 /*
 982  * multiple nonsurrogate diagnostics.
 983  */
 984 static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo)
 985 {
 986     int oid[OID_SIZE];
 987     Z_DiagRecs *recs = (Z_DiagRecs *)odr_malloc (assoc->encode, sizeof(*recs));
 988     int *err = (int *)odr_malloc (assoc->encode, sizeof(*err));
 989     oident bib1;
 990     Z_DiagRec **recp = (Z_DiagRec **)odr_malloc (assoc->encode, sizeof(*recp));
 991     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
 992     Z_DefaultDiagFormat *rec = (Z_DefaultDiagFormat *)odr_malloc (assoc->encode, sizeof(*rec));
 993
 994     logf(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo ? addinfo : "");
 995     bib1.proto = assoc->proto;
 996     bib1.oclass = CLASS_DIAGSET;
 997     bib1.value = VAL_BIB1;
 998
 999     *err = error;
1000     recs->num_diagRecs = 1;
1001     recs->diagRecs = recp;
1002     recp[0] = drec;
1003     drec->which = Z_DiagRec_defaultFormat;
1004     drec->u.defaultFormat = rec;
1005
1006     rec->diagnosticSetId = odr_oiddup (assoc->encode,
1007                                       oid_ent_to_oid(&bib1, oid));
1008     rec->condition = err;
1009
1010 #ifdef ASN_COMPILED
1011     rec->which = Z_DefaultDiagFormat_v2Addinfo;
1012     rec->u.v2Addinfo = addinfo ? addinfo : "";
1013 #else
1014     rec->which = Z_DiagForm_v2AddInfo;
1015     rec->addinfo = addinfo ? addinfo : "";
1016 #endif
1017     return recs;
1018 }
1019
1020 static Z_Records *pack_records(association *a, char *setname, int start,
1021                                 int *num, Z_RecordComposition *comp,
1022                                 int *next, int *pres, oid_value format,
1023                                 Z_ReferenceId *referenceId)
1024 {
1025     int oid[OID_SIZE];
1026     int recno, total_length = 0, toget = *num, dumped_records = 0;
1027     Z_Records *records =
1028         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
1029     Z_NamePlusRecordList *reclist =
1030         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
1031     Z_NamePlusRecord **list =
1032         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
1033     oident recform;
1034
1035     records->which = Z_Records_DBOSD;
1036     records->u.databaseOrSurDiagnostics = reclist;
1037     reclist->num_records = 0;
1038     reclist->records = list;
1039     *pres = Z_PRES_SUCCESS;
1040     *num = 0;
1041     *next = 0;
1042
1043     logf(LOG_LOG, "Request to pack %d+%d", start, toget);
1044     logf(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
1045         a->maximumRecordSize);
1046     for (recno = start; reclist->num_records < toget; recno++)
1047     {
1048         bend_fetchrequest freq;
1049         bend_fetchresult *fres;
1050         Z_NamePlusRecord *thisrec;
1051         Z_DatabaseRecord *thisext;
1052         int this_length = 0;
1053
1054         /*
1055          * we get the number of bytes allocated on the stream before any
1056          * allocation done by the backend - this should give us a reasonable
1057          * idea of the total size of the data so far.
1058          */
1059         total_length = odr_total(a->encode) - dumped_records;
1060         freq.setname = setname;
1061         freq.number = recno;
1062         freq.comp = comp;
1063         freq.format = format;
1064         freq.stream = a->encode;
1065         freq.surrogate_flag = 0;
1066         freq.referenceId = referenceId;
1067         if (!(fres = bend_fetch(a->backend, &freq, 0)))
1068         {
1069             *pres = Z_PRES_FAILURE;
1070             return diagrec(a, 2, "Backend interface problem");
1071         }
1072         /* backend should be able to signal whether error is system-wide
1073            or only pertaining to current record */
1074         if (fres->errcode)
1075         {
1076             if (!freq.surrogate_flag)
1077             {
1078                 *pres = Z_PRES_FAILURE;
1079                 return diagrec(a, fres->errcode, fres->errstring);
1080             }
1081             reclist->records[reclist->num_records] =
1082                 surrogatediagrec(a, fres->basename, fres->errcode,
1083                                  fres->errstring);
1084             reclist->num_records++;
1085             *next = fres->last_in_set ? 0 : recno + 1;
1086             continue;
1087         }
1088         if (fres->len >= 0)
1089             this_length = fres->len;
1090         else
1091             this_length = odr_total(a->encode) - total_length;
1092         logf(LOG_DEBUG, "  fetched record, len=%d, total=%d",
1093             this_length, total_length);
1094         if (this_length + total_length > a->preferredMessageSize)
1095         {
1096             /* record is small enough, really */
1097             if (this_length <= a->preferredMessageSize)
1098             {
1099                 logf(LOG_DEBUG, "  Dropped last normal-sized record");
1100                 *pres = Z_PRES_PARTIAL_2;
1101                 break;
1102             }
1103             /* record can only be fetched by itself */
1104             if (this_length < a->maximumRecordSize)
1105             {
1106                 logf(LOG_DEBUG, "  Record > prefmsgsz");
1107                 if (toget > 1)
1108                 {
1109                     logf(LOG_DEBUG, "  Dropped it");
1110                     reclist->records[reclist->num_records] =
1111                          surrogatediagrec(a, fres->basename, 16, 0);
1112                     reclist->num_records++;
1113                     *next = fres->last_in_set ? 0 : recno + 1;
1114                     dumped_records += this_length;
1115                     continue;
1116                 }
1117             }
1118             else /* too big entirely */
1119             {
1120                 logf(LOG_DEBUG, "Record > maxrcdsz");
1121                 reclist->records[reclist->num_records] =
1122                     surrogatediagrec(a, fres->basename, 17, 0);
1123                 reclist->num_records++;
1124                 *next = fres->last_in_set ? 0 : recno + 1;
1125                 dumped_records += this_length;
1126                 continue;
1127             }
1128         }
1129
1130         if (!(thisrec = (Z_NamePlusRecord *)
1131               odr_malloc(a->encode, sizeof(*thisrec))))
1132             return 0;
1133         if (!(thisrec->databaseName = (char *)odr_malloc(a->encode,
1134             strlen(fres->basename) + 1)))
1135             return 0;
1136         strcpy(thisrec->databaseName, fres->basename);
1137         thisrec->which = Z_NamePlusRecord_databaseRecord;
1138         if (!(thisrec->u.databaseRecord = thisext = (Z_External *)
1139               odr_malloc(a->encode, sizeof(Z_DatabaseRecord))))
1140             return 0;
1141         recform.proto = a->proto;
1142         recform.oclass = CLASS_RECSYN;
1143         recform.value = fres->format;
1144         thisext->direct_reference =
1145             odr_oiddup(a->encode, oid_ent_to_oid(&recform, oid));
1146         thisext->indirect_reference = 0;
1147         thisext->descriptor = 0;
1148         if (fres->len < 0) /* Structured data */
1149         {
1150             switch (fres->format)
1151             {
1152                 case VAL_SUTRS: thisext->which = Z_External_sutrs; break;
1153                 case VAL_GRS1: thisext->which = Z_External_grs1; break;
1154                 case VAL_EXPLAIN: thisext->which = Z_External_explainRecord;
1155                     break;
1156                 case VAL_SUMMARY: thisext->which = Z_External_summary; break;
1157                 case VAL_OPAC: thisext->which = Z_External_OPAC; break;
1158
1159                 default:
1160                     logf(LOG_FATAL, "Unknown structured format from backend.");
1161                     return 0;
1162             }
1163
1164             /*
1165              * We cheat on the pointers here. Obviously, the record field
1166              * of the backend-fetch structure should have been a union for
1167              * correctness, but we're stuck with this for backwards
1168              * compatibility.
1169              */
1170             thisext->u.grs1 = (Z_GenericRecord*) fres->record;
1171         }
1172         else if (fres->format == VAL_SUTRS) /* SUTRS is a single-ASN.1-type */
1173         {
1174 #if 0
1175             Z_SUTRS *sutrs = (Z_SUTRS *)odr_malloc(a->encode, 1+fres->len);
1176
1177             memcpy(sutrs, fres->record, fres->len);
1178             sutrs[fres->len] = '\0';
1179 #else
1180             Odr_oct *sutrs = (Odr_oct *)odr_malloc(a->encode, sizeof(*sutrs));
1181
1182             thisext->which = Z_External_sutrs;
1183             thisext->u.sutrs = sutrs;
1184             sutrs->buf = (unsigned char *)odr_malloc(a->encode, fres->len);
1185             sutrs->len = sutrs->size = fres->len;
1186             memcpy(sutrs->buf, fres->record, fres->len);
1187 #endif
1188         }
1189         else /* octet-aligned record. */
1190         {
1191             thisext->which = Z_External_octet;
1192             if (!(thisext->u.octet_aligned = (Odr_oct *)odr_malloc(a->encode,
1193                 sizeof(Odr_oct))))
1194                 return 0;
1195             if (!(thisext->u.octet_aligned->buf = (unsigned char *)
1196                   odr_malloc(a->encode, fres->len)))
1197                 return 0;
1198             memcpy(thisext->u.octet_aligned->buf, fres->record, fres->len);
1199             thisext->u.octet_aligned->len = thisext->u.octet_aligned->size =
1200                 fres->len;
1201         }
1202         reclist->records[reclist->num_records] = thisrec;
1203         reclist->num_records++;
1204         *next = fres->last_in_set ? 0 : recno + 1;
1205     }
1206     *num = reclist->num_records;
1207     return records;
1208 }
1209
1210 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
1211     int *fd)
1212 {
1213     Z_SearchRequest *req = reqb->request->u.searchRequest;
1214     bend_search_rr *bsrr =
1215         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
1216
1217     logf(LOG_LOG, "Got SearchRequest.");
1218     bsrr->fd = fd;
1219     bsrr->request = reqb;
1220     bsrr->association = assoc;
1221     bsrr->referenceId = req->referenceId;
1222     save_referenceId (reqb, bsrr->referenceId);
1223
1224     logf (LOG_LOG, "ResultSet '%s'", req->resultSetName);
1225     if (req->databaseNames)
1226     {
1227         int i;
1228         for (i = 0; i < req->num_databaseNames; i++)
1229             logf (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1230     }
1231     switch (req->query->which)
1232     {
1233     case Z_Query_type_1: case Z_Query_type_101:
1234         log_rpn_query (req->query->u.type_1);
1235     }
1236     if (assoc->bend_search)
1237     {
1238         bsrr->setname = req->resultSetName;
1239         bsrr->replace_set = *req->replaceIndicator;
1240         bsrr->num_bases = req->num_databaseNames;
1241         bsrr->basenames = req->databaseNames;
1242         bsrr->query = req->query;
1243         bsrr->stream = assoc->encode;
1244         bsrr->decode = assoc->decode;
1245         bsrr->errcode = 0;
1246         bsrr->hits = 0;
1247         bsrr->errstring = NULL;
1248         ((int (*)(void *, bend_search_rr *))(assoc->bend_search))
1249             (assoc->backend, bsrr);
1250         if (!bsrr->request)
1251             return 0;
1252     }
1253     else
1254     {
1255         bend_searchrequest bsrq;
1256         bend_searchresult *bsrt;
1257
1258         bsrq.setname = req->resultSetName;
1259         bsrq.replace_set = *req->replaceIndicator;
1260         bsrq.num_bases = req->num_databaseNames;
1261         bsrq.basenames = req->databaseNames;
1262         bsrq.query = req->query;
1263         bsrq.referenceId = req->referenceId;
1264         bsrq.stream = assoc->encode;
1265         bsrq.decode = assoc->decode;
1266         if (!(bsrt = bend_search (assoc->backend, &bsrq, fd)))
1267             return 0;
1268         bsrr->hits = bsrt->hits;
1269         bsrr->errcode = bsrt->errcode;
1270         bsrr->errstring = bsrt->errstring;
1271     }
1272     return response_searchRequest(assoc, reqb, bsrr, fd);
1273 }
1274
1275 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
1276
1277 /*
1278  * Prepare a searchresponse based on the backend results. We probably want
1279  * to look at making the fetching of records nonblocking as well, but
1280  * so far, we'll keep things simple.
1281  * If bsrt is null, that means we're called in response to a communications
1282  * event, and we'll have to get the response for ourselves.
1283  */
1284 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
1285     bend_search_rr *bsrt, int *fd)
1286 {
1287     Z_SearchRequest *req = reqb->request->u.searchRequest;
1288     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1289     Z_SearchResponse *resp = (Z_SearchResponse *)
1290         odr_malloc (assoc->encode, sizeof(*resp));
1291     int *nulint = (int *)odr_malloc (assoc->encode, sizeof(*nulint));
1292     bool_t *sr = (bool_t *)odr_malloc (assoc->encode, sizeof(*sr));
1293     int *next = (int *)odr_malloc (assoc->encode, sizeof(*next));
1294     int *none = (int *)odr_malloc (assoc->encode, sizeof(*none));
1295
1296     *nulint = 0;
1297     *sr = 1;
1298     *next = 0;
1299     *none = Z_RES_NONE;
1300
1301     apdu->which = Z_APDU_searchResponse;
1302     apdu->u.searchResponse = resp;
1303     resp->referenceId = req->referenceId;
1304     resp->additionalSearchInfo = 0;
1305     resp->otherInfo = 0;
1306     *fd = -1;
1307     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
1308     {
1309         logf(LOG_FATAL, "Bad result from backend");
1310         return 0;
1311     }
1312     else if (bsrt->errcode)
1313     {
1314         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
1315         resp->resultCount = nulint;
1316         resp->numberOfRecordsReturned = nulint;
1317         resp->nextResultSetPosition = nulint;
1318         resp->searchStatus = nulint;
1319         resp->resultSetStatus = none;
1320         resp->presentStatus = 0;
1321     }
1322     else
1323     {
1324         int *toget = (int *)odr_malloc (assoc->encode, sizeof(*toget));
1325         int *presst = (int *)odr_malloc (assoc->encode, sizeof(*presst));
1326         Z_RecordComposition comp, *compp = 0;
1327
1328         *toget = 0;
1329         *presst = 0;
1330         resp->records = 0;
1331         resp->resultCount = &bsrt->hits;
1332
1333         comp.which = Z_RecordComp_simple;
1334         /* how many records does the user agent want, then? */
1335         if (bsrt->hits <= *req->smallSetUpperBound)
1336         {
1337             *toget = bsrt->hits;
1338             if ((comp.u.simple = req->smallSetElementSetNames))
1339                 compp = &comp;
1340         }
1341         else if (bsrt->hits < *req->largeSetLowerBound)
1342         {
1343             *toget = *req->mediumSetPresentNumber;
1344             if (*toget > bsrt->hits)
1345                 *toget = bsrt->hits;
1346             if ((comp.u.simple = req->mediumSetElementSetNames))
1347                 compp = &comp;
1348         }
1349         else
1350             *toget = 0;
1351
1352         if (*toget && !resp->records)
1353         {
1354             oident *prefformat;
1355             oid_value form;
1356
1357             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
1358                 prefformat->oclass != CLASS_RECSYN)
1359                 form = VAL_NONE;
1360             else
1361                 form = prefformat->value;
1362             resp->records = pack_records(assoc, req->resultSetName, 1,
1363                 toget, compp, next, presst, form, req->referenceId);
1364             if (!resp->records)
1365                 return 0;
1366             resp->numberOfRecordsReturned = toget;
1367             resp->nextResultSetPosition = next;
1368             resp->searchStatus = sr;
1369             resp->resultSetStatus = 0;
1370             resp->presentStatus = presst;
1371         }
1372         else
1373         {
1374             if (*resp->resultCount)
1375                 *next = 1;
1376             resp->numberOfRecordsReturned = nulint;
1377             resp->nextResultSetPosition = next;
1378             resp->searchStatus = sr;
1379             resp->resultSetStatus = 0;
1380             resp->presentStatus = 0;
1381         }
1382     }
1383     return apdu;
1384 }
1385
1386 /*
1387  * Maybe we got a little over-friendly when we designed bend_fetch to
1388  * get only one record at a time. Some backends can optimise multiple-record
1389  * fetches, and at any rate, there is some overhead involved in
1390  * all that selecting and hopping around. Problem is, of course, that the
1391  * frontend can't know ahead of time how many records it'll need to
1392  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
1393  * is downright lousy as a bulk data transfer protocol.
1394  *
1395  * To start with, we'll do the fetching of records from the backend
1396  * in one operation: To save some trips in and out of the event-handler,
1397  * and to simplify the interface to pack_records. At any rate, asynch
1398  * operation is more fun in operations that have an unpredictable execution
1399  * speed - which is normally more true for search than for present.
1400  */
1401 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
1402     int *fd)
1403 {
1404     Z_PresentRequest *req = reqb->request->u.presentRequest;
1405     oident *prefformat;
1406     oid_value form;
1407     Z_APDU *apdu;
1408     Z_PresentResponse *resp;
1409     int *presst;
1410     int *next;
1411     int *num;
1412
1413     logf(LOG_LOG, "Got PresentRequest.");
1414
1415     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
1416         prefformat->oclass != CLASS_RECSYN)
1417         form = VAL_NONE;
1418     else
1419         form = prefformat->value;
1420     if (assoc->bend_present)
1421     {
1422         bend_present_rr *bprr = (bend_present_rr *)
1423             nmem_malloc (reqb->request_mem, sizeof(*bprr));
1424         bprr->setname = req->resultSetId;
1425         bprr->start = *req->resultSetStartPoint;
1426         bprr->number = *req->numberOfRecordsRequested;
1427         bprr->format = form;
1428         bprr->comp = req->recordComposition;
1429         bprr->referenceId = req->referenceId;
1430         bprr->stream = assoc->encode;
1431         bprr->request = reqb;
1432         bprr->association = assoc;
1433         bprr->errcode = 0;
1434         bprr->errstring = NULL;
1435         ((int (*)(void *, bend_present_rr *))(*assoc->bend_present))(
1436             assoc->backend, bprr);
1437
1438         if (!bprr->request)
1439             return 0;
1440     }
1441     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1442     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
1443     presst = (int *)odr_malloc (assoc->encode, sizeof(*presst));
1444     next = (int *)odr_malloc (assoc->encode, sizeof(*next));
1445     num = (int *)odr_malloc (assoc->encode, sizeof(*num));
1446     *presst = 0;
1447     *next = 0;
1448     *num = *req->numberOfRecordsRequested;
1449
1450     apdu->which = Z_APDU_presentResponse;
1451     apdu->u.presentResponse = resp;
1452     resp->referenceId = req->referenceId;
1453     resp->otherInfo = 0;
1454
1455     resp->records =
1456         pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
1457                      num, req->recordComposition, next, presst, form,
1458                      req->referenceId);
1459     if (!resp->records)
1460         return 0;
1461     resp->numberOfRecordsReturned = num;
1462     resp->presentStatus = presst;
1463     resp->nextResultSetPosition = next;
1464
1465     return apdu;
1466 }
1467
1468 /*
1469  * Scan was implemented rather in a hurry, and with support for only the basic
1470  * elements of the service in the backend API. Suggestions are welcome.
1471  */
1472 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
1473 {
1474     Z_ScanRequest *req = reqb->request->u.scanRequest;
1475     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1476     Z_ScanResponse *res = (Z_ScanResponse *)
1477         odr_malloc (assoc->encode, sizeof(*res));
1478     int *scanStatus = (int *)
1479         odr_malloc (assoc->encode, sizeof(*scanStatus));
1480     int *numberOfEntriesReturned = (int *)
1481         odr_malloc (assoc->encode, sizeof(*numberOfEntriesReturned));
1482     Z_ListEntries *ents = (Z_ListEntries *)
1483         odr_malloc (assoc->encode, sizeof(*ents));
1484     Z_DiagRecs *diagrecs_p = NULL;
1485     oident *attent;
1486     bend_scanrequest srq;
1487     bend_scanresult *srs;
1488     oident *attset;
1489
1490     logf(LOG_LOG, "Got ScanRequest");
1491     *scanStatus = Z_Scan_failure;
1492     *numberOfEntriesReturned = 0;
1493
1494     apdu->which = Z_APDU_scanResponse;
1495     apdu->u.scanResponse = res;
1496     res->referenceId = req->referenceId;
1497     res->stepSize = 0;
1498     res->scanStatus = scanStatus;
1499     res->numberOfEntriesReturned = numberOfEntriesReturned;
1500     res->positionOfTerm = 0;
1501     res->entries = ents;
1502     ents->num_entries = 0;
1503     ents->entries = NULL;
1504     ents->num_nonsurrogateDiagnostics = 0;
1505     ents->nonsurrogateDiagnostics = NULL;
1506     res->attributeSet = 0;
1507     res->otherInfo = 0;
1508
1509     if (req->attributeSet && (!(attent = oid_getentbyoid(req->attributeSet)) ||
1510                               attent->oclass != CLASS_ATTSET
1511                               || attent->value != VAL_BIB1))
1512         diagrecs_p = diagrecs(assoc, 121, 0);
1513     else if (req->stepSize && *req->stepSize > 0)
1514         diagrecs_p = diagrecs(assoc, 205, 0);
1515     else
1516     {
1517         if (req->databaseNames)
1518         {
1519             int i;
1520             for (i = 0; i < req->num_databaseNames; i++)
1521                 logf (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1522         }
1523         srq.num_bases = req->num_databaseNames;
1524         srq.basenames = req->databaseNames;
1525         srq.num_entries = *req->numberOfTermsRequested;
1526         srq.term = req->termListAndStartPoint;
1527         srq.referenceId = req->referenceId;
1528         srq.stream = assoc->encode;
1529         if (!(attset = oid_getentbyoid(req->attributeSet)) ||
1530             attset->oclass != CLASS_RECSYN)
1531             srq.attributeset = VAL_NONE;
1532         else
1533             srq.attributeset = attset->value;
1534         log_scan_term (req->termListAndStartPoint, attset->value);
1535         srq.term_position = req->preferredPositionInResponse ?
1536             *req->preferredPositionInResponse : 1;
1537         if (!(srs = bend_scan(assoc->backend, &srq, 0)))
1538             diagrecs_p = diagrecs(assoc, 2, 0);
1539         else if (srs->errcode)
1540             diagrecs_p = diagrecs(assoc, srs->errcode, srs->errstring);
1541         else
1542         {
1543             int i;
1544             Z_Entry **tab = (Z_Entry **)
1545                 odr_malloc (assoc->encode, sizeof(*tab) * srs->num_entries);
1546
1547             if (srs->status == BEND_SCAN_PARTIAL)
1548                 *scanStatus = Z_Scan_partial_5;
1549             else
1550                 *scanStatus = Z_Scan_success;
1551             ents->entries = tab;
1552             ents->num_entries = srs->num_entries;
1553             res->numberOfEntriesReturned = &ents->num_entries;
1554             res->positionOfTerm = &srs->term_position;
1555             for (i = 0; i < srs->num_entries; i++)
1556             {
1557                 Z_Entry *e;
1558                 Z_TermInfo *t;
1559                 Odr_oct *o;
1560
1561                 tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
1562                 if (srs->entries[i].occurrences >= 0)
1563                 {
1564                     e->which = Z_Entry_termInfo;
1565                     e->u.termInfo = t = (Z_TermInfo *)
1566                         odr_malloc(assoc->encode, sizeof(*t));
1567                     t->suggestedAttributes = 0;
1568                     t->displayTerm = 0;
1569                     t->alternativeTerm = 0;
1570                     t->byAttributes = 0;
1571                     t->otherTermInfo = 0;
1572                     t->globalOccurrences = &srs->entries[i].occurrences;
1573                     t->term = (Z_Term *)
1574                         odr_malloc(assoc->encode, sizeof(*t->term));
1575                     t->term->which = Z_Term_general;
1576                     t->term->u.general = o =
1577                         (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
1578                     o->buf = (unsigned char *)
1579                         odr_malloc(assoc->encode, o->len = o->size =
1580                                    strlen(srs->entries[i].term));
1581                     memcpy(o->buf, srs->entries[i].term, o->len);
1582                     logf(LOG_DEBUG, "  term #%d: '%s' (%d)", i,
1583                          srs->entries[i].term, srs->entries[i].occurrences);
1584                 }
1585                 else
1586                 {
1587                     Z_DiagRecs *drecs = diagrecs (assoc,
1588                                                   srs->entries[i].errcode,
1589                                                   srs->entries[i].errstring);
1590                     assert (drecs->num_diagRecs == 1);
1591                     e->which = Z_Entry_surrogateDiagnostic;
1592                     assert (drecs->diagRecs[0]);
1593                     e->u.surrogateDiagnostic = drecs->diagRecs[0];
1594                 }
1595             }
1596         }
1597     }
1598     if (diagrecs_p)
1599     {
1600         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
1601         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
1602     }
1603     return apdu;
1604 }
1605
1606 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
1607     int *fd)
1608 {
1609     Z_SortRequest *req = reqb->request->u.sortRequest;
1610     Z_SortResponse *res = (Z_SortResponse *)
1611         odr_malloc (assoc->encode, sizeof(*res));
1612     bend_sort_rr *bsrr = (bend_sort_rr *)
1613         odr_malloc (assoc->encode, sizeof(*bsrr));
1614
1615     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1616
1617     logf(LOG_LOG, "Got SortRequest.");
1618
1619 #ifdef ASN_COMPILED
1620     bsrr->num_input_setnames = req->num_inputResultSetNames;
1621     bsrr->input_setnames = req->inputResultSetNames;
1622 #else
1623     bsrr->num_input_setnames = req->inputResultSetNames->num_strings;
1624     bsrr->input_setnames = req->inputResultSetNames->strings;
1625 #endif
1626     bsrr->referenceId = req->referenceId;
1627     bsrr->output_setname = req->sortedResultSetName;
1628     bsrr->sort_sequence = req->sortSequence;
1629     bsrr->stream = assoc->encode;
1630
1631     bsrr->sort_status = Z_SortStatus_failure;
1632     bsrr->errcode = 0;
1633     bsrr->errstring = 0;
1634
1635     ((int (*)(void *, bend_sort_rr *))(*assoc->bend_sort))(assoc->backend,
1636                                                            bsrr);
1637
1638     res->referenceId = bsrr->referenceId;
1639     res->sortStatus = (int *)
1640         odr_malloc (assoc->encode, sizeof(*res->sortStatus));
1641     *res->sortStatus = bsrr->sort_status;
1642     res->resultSetStatus = 0;
1643     if (bsrr->errcode)
1644     {
1645         Z_DiagRecs *dr = diagrecs (assoc, bsrr->errcode, bsrr->errstring);
1646 #ifdef ASN_COMPILED
1647         res->diagnostics = dr->diagRecs;
1648         res->num_diagnostics = dr->num_diagRecs;
1649 #else
1650         res->diagnostics = dr;
1651 #endif
1652     }
1653     else
1654     {
1655 #ifdef ASN_COMPILED
1656         res->num_diagnostics = 0;
1657 #endif
1658         res->diagnostics = 0;
1659     }
1660     res->otherInfo = 0;
1661
1662     apdu->which = Z_APDU_sortResponse;
1663     apdu->u.sortResponse = res;
1664     return apdu;
1665 }
1666
1667 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
1668     int *fd)
1669 {
1670     Z_DeleteResultSetRequest *req = reqb->request->u.deleteResultSetRequest;
1671     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
1672         odr_malloc (assoc->encode, sizeof(*res));
1673     bend_delete_rr *bdrr = (bend_delete_rr *)
1674         odr_malloc (assoc->encode, sizeof(*bdrr));
1675     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1676
1677     logf(LOG_LOG, "Got DeleteRequest.");
1678
1679     bdrr->num_setnames = req->num_resultSetList;
1680     bdrr->setnames = req->resultSetList;
1681     bdrr->stream = assoc->encode;
1682     bdrr->function = *req->deleteFunction;
1683     bdrr->referenceId = req->referenceId;
1684
1685     ((int (*)(void *, bend_delete_rr *))
1686      (*assoc->bend_delete))(assoc->backend, bdrr);
1687
1688     res->referenceId = req->referenceId;
1689
1690     res->deleteOperationStatus = (int *)
1691         odr_malloc (assoc->encode, sizeof(*res->deleteOperationStatus));
1692     *res->deleteOperationStatus = bdrr->delete_status;
1693
1694     res->deleteListStatuses = 0;
1695     res->numberNotDeleted = 0;
1696     res->bulkStatuses = 0;
1697     res->deleteMessage = 0;
1698     res->otherInfo = 0;
1699
1700     apdu->which = Z_APDU_deleteResultSetResponse;
1701     apdu->u.deleteResultSetResponse = res;
1702     return apdu;
1703 }
1704
1705 static void process_close(association *assoc, request *reqb)
1706 {
1707     Z_Close *req = reqb->request->u.close;
1708     static char *reasons[] =
1709     {
1710         "finished",
1711         "shutdown",
1712         "systemProblem",
1713         "costLimit",
1714         "resources",
1715         "securityViolation",
1716         "protocolError",
1717         "lackOfActivity",
1718         "peerAbort",
1719         "unspecified"
1720     };
1721
1722     logf(LOG_LOG, "Got Close, reason %s, message %s",
1723         reasons[*req->closeReason], req->diagnosticInformation ?
1724         req->diagnosticInformation : "NULL");
1725     if (assoc->version < 3) /* to make do_force respond with close */
1726         assoc->version = 3;
1727     do_close_req(assoc, Z_Close_finished,
1728                  "Association terminated by client", reqb);
1729 }
1730
1731 void save_referenceId (request *reqb, Z_ReferenceId *refid)
1732 {
1733     if (refid)
1734     {
1735         reqb->len_refid = refid->len;
1736         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
1737         memcpy (reqb->refid, refid->buf, refid->len);
1738     }
1739     else
1740     {
1741         reqb->len_refid = 0;
1742         reqb->refid = NULL;
1743     }
1744 }
1745
1746 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
1747 {
1748     process_response (a, req, res);
1749 }
1750
1751 bend_request bend_request_mk (bend_association a)
1752 {
1753     request *nreq = request_get (&a->outgoing);
1754     nreq->request_mem = nmem_create ();
1755     return nreq;
1756 }
1757
1758 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
1759 {
1760     Z_ReferenceId *id;
1761     if (!req->refid)
1762         return 0;
1763     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
1764     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
1765     id->len = id->size = req->len_refid;
1766     memcpy (id->buf, req->refid, req->len_refid);
1767     return id;
1768 }
1769
1770 void bend_request_destroy (bend_request *req)
1771 {
1772     nmem_destroy((*req)->request_mem);
1773     request_release(*req);
1774     *req = NULL;
1775 }
1776
1777 int bend_backend_respond (bend_association a, bend_request req)
1778 {
1779     return process_request (a, req);
1780 }
1781
1782 void bend_request_setdata(bend_request r, void *p)
1783 {
1784     r->clientData = p;
1785 }
1786
1787 void *bend_request_getdata(bend_request r)
1788 {
1789     return r->clientData;
1790 }
1791
1792 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
1793 {
1794     bend_esrequest_rr esrequest;
1795
1796     Z_ExtendedServicesRequest *req = reqb->request->u.extendedServicesRequest;
1797     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
1798
1799     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
1800
1801     logf(LOG_DEBUG,"inside Process esRequest");
1802
1803     esrequest.esr = reqb->request->u.extendedServicesRequest;
1804     esrequest.stream = assoc->encode;
1805     esrequest.errcode = 0;
1806     esrequest.errstring = NULL;
1807     esrequest.request = reqb;
1808     esrequest.association = assoc;
1809     esrequest.referenceId = req->referenceId;
1810
1811     ((int (*)(void *, bend_esrequest_rr *))(*assoc->bend_esrequest))
1812         (assoc->backend, &esrequest);
1813
1814     /* If the response is being delayed, return NULL */
1815     if (esrequest.request == NULL)
1816         return(NULL);
1817
1818     resp->referenceId = req->referenceId;
1819
1820     if ( esrequest.errcode == 0 )
1821     {
1822         /* Backend service indicates request will be processed */
1823         logf(LOG_DEBUG,"Request will be processed...Good !");
1824         *resp->operationStatus = Z_ExtendedServicesResponse_done;
1825     }
1826     else
1827     {
1828         /* Backend indicates error, request will not be processed */
1829         logf(LOG_DEBUG,"Request will not be processed...BAD !");
1830         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
1831     }
1832     /* Do something with the members of bend_extendedservice */
1833
1834     logf(LOG_DEBUG,"Send the result apdu");
1835
1836     return apdu;
1837 }