server/seshigh.c

   1 /*
   2  * Copyright (c) 1995-2000, Index Data
   3  * See the file LICENSE for details.
   4  *
   5  * $Log: seshigh.c,v $
   6  * Revision 1.106  2000-08-31 09:51:25  adam
   7  * Added record_syntax member for fetch method (raw OID).
   8  *
   9  * Revision 1.105  2000/07/06 10:38:47  adam
  10  * Enhanced option --enable-tcpd.
  11  *
  12  * Revision 1.104  2000/04/05 07:39:55  adam
  13  * Added shared library support (libtool).
  14  *
  15  * Revision 1.103  2000/03/20 19:06:25  adam
  16  * Added Segment request for fronend server. Work on admin for client.
  17  *
  18  * Revision 1.102  2000/03/15 12:59:49  adam
  19  * Added handle member to statserv_control.
  20  *
  21  * Revision 1.101  2000/01/12 14:36:07  adam
  22  * Added printing stream (ODR) for backend functions.
  23  *
  24  * Revision 1.100  1999/12/16 23:36:19  adam
  25  * Implemented ILL protocol. Minor updates ASN.1 compiler.
  26  *
  27  * Revision 1.99  1999/11/30 13:47:12  adam
  28  * Improved installation. Moved header files to include/yaz.
  29  *
  30  * Revision 1.98  1999/11/29 15:12:27  adam
  31  * Changed the way implementationName - and version is set.
  32  *
  33  * Revision 1.96  1999/11/04 14:58:44  adam
  34  * Added status elements for backend delete result set handler.
  35  * Updated delete result result set command for client.
  36  *
  37  * Revision 1.95  1999/10/11 10:01:24  adam
  38  * Implemented bend_sort_rr handler for frontend server.
  39  *
  40  * Revision 1.94  1999/08/27 09:40:32  adam
  41  * Renamed logf function to yaz_log. Removed VC++ project files.
  42  *
  43  * Revision 1.93  1999/07/06 12:17:15  adam
  44  * Added option -1 that runs server once (for profiling purposes).
  45  *
  46  * Revision 1.92  1999/06/17 10:54:45  adam
  47  * Added facility to specify implementation version - and name
  48  * for server.
  49  *
  50  * Revision 1.91  1999/06/01 14:29:12  adam
  51  * Work on Extended Services.
  52  *
  53  * Revision 1.90  1999/05/27 13:02:20  adam
  54  * Assigned OID for old DB Update (VAL_DBUPDATE0).
  55  *
  56  * Revision 1.89  1999/05/26 15:24:26  adam
  57  * Fixed minor bugs regarding DB Update (introduced by previous commit).
  58  *
  59  * Revision 1.88  1999/04/20 09:56:48  adam
  60  * Added 'name' paramter to encoder/decoder routines (typedef Odr_fun).
  61  * Modified all encoders/decoders to reflect this change.
  62  *
  63  * Revision 1.87  1999/03/31 11:18:25  adam
  64  * Implemented odr_strdup. Added Reference ID to backend server API.
  65  *
  66  * Revision 1.86  1999/02/02 13:57:38  adam
  67  * Uses preprocessor define WIN32 instead of WINDOWS to build code
  68  * for Microsoft WIN32.
  69  *
  70  * Revision 1.85  1998/11/17 09:52:59  adam
  71  * Fixed minor bug (introduced by previous commit).
  72  *
  73  * Revision 1.84  1998/11/16 16:02:32  adam
  74  * Added loggin utilies, log_rpn_query and log_scan_term. These used
  75  * to be part of Zebra.
  76  *
  77  * Revision 1.83  1998/11/03 10:09:36  adam
  78  * Fixed bug regarding YC.
  79  *
  80  * Revision 1.82  1998/10/20 14:00:30  quinn
  81  * Fixed Scan
  82  *
  83  * Revision 1.81  1998/10/13 16:12:24  adam
  84  * Added support for Surrogate Diagnostics for Scan Term entries.
  85  *
  86  * Revision 1.80  1998/09/02 12:41:53  adam
  87  * Added decode stream in bend search structures.
  88  *
  89  * Revision 1.79  1998/08/19 16:10:08  adam
  90  * Changed som member names of DeleteResultSetRequest/Response.
  91  *
  92  * Revision 1.78  1998/08/03 10:23:55  adam
  93  * Fixed bug regarding Options for Sort.
  94  *
  95  * Revision 1.77  1998/07/20 12:38:42  adam
  96  * Implemented delete result set service to server API.
  97  *
  98  * Revision 1.76  1998/05/27 16:57:07  adam
  99  * Support for surrogate diagnostic records added for bend_fetch.
 100  *
 101  * Revision 1.75  1998/05/18 10:13:07  adam
 102  * Fixed call to es_request handler - extra argument was passed.
 103  *
 104  * Revision 1.74  1998/03/31 15:13:20  adam
 105  * Development towards compiled ASN.1.
 106  *
 107  * Revision 1.73  1998/03/31 11:07:45  adam
 108  * Furhter work on UNIverse resource report.
 109  * Added Extended Services handling in frontend server.
 110  *
 111  * Revision 1.72  1998/02/11 11:53:35  adam
 112  * Changed code so that it compiles as C++.
 113  *
 114  * Revision 1.71  1998/02/10 11:03:57  adam
 115  * Added support for extended handlers in backend server interface.
 116  *
 117  * Revision 1.70  1998/01/29 13:15:35  adam
 118  * Implemented sort for the backend interface.
 119  *
 120  * Revision 1.69  1997/09/30 11:48:12  adam
 121  * Fixed bug introduced by previous commit.
 122  *
 123  * Revision 1.68  1997/09/29 13:18:59  adam
 124  * Added function, oid_ent_to_oid, to replace the function
 125  * oid_getoidbyent, which is not thread safe.
 126  *
 127  * Revision 1.67  1997/09/17 12:10:40  adam
 128  * YAZ version 1.4.
 129  *
 130  * Revision 1.66  1997/09/05 15:26:44  adam
 131  * Added ODR encode in search and scen bend request structures.
 132  * Fixed a few enums that caused trouble with C++.
 133  *
 134  * Revision 1.65  1997/09/01 08:53:01  adam
 135  * New windows NT/95 port using MSV5.0. The test server 'ztest' was
 136  * moved a separate directory. MSV5.0 project server.dsp created.
 137  * As an option, the server can now operate as an NT service.
 138  *
 139  * Revision 1.64  1997/04/30 08:52:11  quinn
 140  * Null
 141  *
 142  * Revision 1.63  1996/10/11  11:57:26  quinn
 143  * Smallish
 144  *
 145  * Revision 1.62  1996/07/06  19:58:35  quinn
 146  * System headerfiles gathered in yconfig
 147  *
 148  * Revision 1.61  1996/06/10  08:56:16  quinn
 149  * Work on Summary.
 150  *
 151  * Revision 1.60  1996/05/30  11:03:10  quinn
 152  * Fixed NextresultSetPosition bug fixed.
 153  *
 154  * Revision 1.59  1996/05/14  09:26:46  quinn
 155  * Added attribute set to scan backend
 156  *
 157  * Revision 1.58  1996/02/20  12:53:04  quinn
 158  * Chanes to SCAN
 159  *
 160  * Revision 1.57  1996/01/02  08:57:47  quinn
 161  * Changed enums in the ASN.1 .h files to #defines. Changed oident.class to oclass
 162  *
 163  * Revision 1.56  1995/12/14  11:09:57  quinn
 164  * Work on Explain
 165  *
 166  * Revision 1.55  1995/11/08  17:41:37  quinn
 167  * Smallish.
 168  *
 169  * Revision 1.54  1995/11/08  15:11:29  quinn
 170  * Log of close transmit.
 171  *
 172  * Revision 1.53  1995/11/01  13:54:58  quinn
 173  * Minor adjustments
 174  *
 175  * Revision 1.52  1995/11/01  12:19:13  quinn
 176  * Second attempt to fix same bug.
 177  *
 178  * Revision 1.50  1995/10/25  16:58:32  quinn
 179  * Simple.
 180  *
 181  * Revision 1.49  1995/10/16  13:51:53  quinn
 182  * Changes to provide Especs to the backend.
 183  *
 184  * Revision 1.48  1995/10/06  08:51:20  quinn
 185  * Added Write-buffer.
 186  *
 187  * Revision 1.47  1995/08/29  14:24:16  quinn
 188  * Added second half of close-handshake
 189  *
 190  * Revision 1.46  1995/08/29  11:17:58  quinn
 191  * Added code to receive close
 192  *
 193  * Revision 1.45  1995/08/21  09:11:00  quinn
 194  * Smallish fixes to suppport new formats.
 195  *
 196  * Revision 1.44  1995/08/17  12:45:25  quinn
 197  * Fixed minor problems with GRS-1. Added support in c&s.
 198  *
 199  * Revision 1.43  1995/08/15  12:00:31  quinn
 200  * Updated External
 201  *
 202  * Revision 1.42  1995/08/15  11:16:50  quinn
 203  *
 204  * Revision 1.41  1995/08/02  10:23:06  quinn
 205  * Smallish
 206  *
 207  * Revision 1.40  1995/07/31  14:34:26  quinn
 208  * Fixed bug in process_searchResponse (numberOfRecordsReturned).
 209  *
 210  * Revision 1.39  1995/06/27  13:21:00  quinn
 211  * SUTRS support
 212  *
 213  * Revision 1.38  1995/06/19  12:39:11  quinn
 214  * Fixed bug in timeout code. Added BER dumper.
 215  *
 216  * Revision 1.37  1995/06/16  13:16:14  quinn
 217  * Fixed Defaultdiagformat.
 218  *
 219  * Revision 1.36  1995/06/16  10:31:36  quinn
 220  * Added session timeout.
 221  *
 222  * Revision 1.35  1995/06/15  07:45:14  quinn
 223  * Moving to v3.
 224  *
 225  * Revision 1.34  1995/06/14  15:26:46  quinn
 226  * *** empty log message ***
 227  *
 228  * Revision 1.33  1995/06/06  14:57:05  quinn
 229  * Better diagnostics.
 230  *
 231  * Revision 1.32  1995/06/06  08:41:44  quinn
 232  * Better diagnostics.
 233  *
 234  * Revision 1.31  1995/06/06  08:15:37  quinn
 235  * Cosmetic.
 236  *
 237  * Revision 1.30  1995/06/05  10:53:32  quinn
 238  * Added a better SCAN.
 239  *
 240  * Revision 1.29  1995/06/01  11:25:03  quinn
 241  * Smallish.
 242  *
 243  * Revision 1.28  1995/06/01  11:21:01  quinn
 244  * Attempting to fix a bug in pack-records. replaced break with continue
 245  * for large records, according to standard.
 246  *
 247  * Revision 1.27  1995/05/29  08:12:06  quinn
 248  * Moved oid to util
 249  *
 250  * Revision 1.26  1995/05/18  13:02:12  quinn
 251  * Smallish.
 252  *
 253  * Revision 1.25  1995/05/17  08:42:26  quinn
 254  * Transfer auth info to backend. Allow backend to reject init gracefully.
 255  *
 256  * Revision 1.24  1995/05/16  08:51:04  quinn
 257  * License, documentation, and memory fixes
 258  *
 259  * Revision 1.23  1995/05/15  13:25:10  quinn
 260  * Fixed memory bug.
 261  *
 262  * Revision 1.22  1995/05/15  11:56:39  quinn
 263  * Asynchronous facilities. Restructuring of seshigh code.
 264  *
 265  * Revision 1.21  1995/05/02  08:53:19  quinn
 266  * Trying in vain to fix comm with ISODE
 267  *
 268  * Revision 1.20  1995/04/20  15:13:00  quinn
 269  * Cosmetic
 270  *
 271  * Revision 1.19  1995/04/18  08:15:34  quinn
 272  * Added dynamic memory allocation on encoding (whew). Code is now somewhat
 273  * neater. We'll make the same change for decoding one day.
 274  *
 275  * Revision 1.18  1995/04/17  11:28:25  quinn
 276  * Smallish
 277  *
 278  * Revision 1.17  1995/04/10  10:23:36  quinn
 279  * Some work to add scan and other things.
 280  *
 281  * Revision 1.16  1995/03/31  09:18:55  quinn
 282  * Added logging.
 283  *
 284  * Revision 1.15  1995/03/30  14:03:23  quinn
 285  * Added RFC1006 as separate library
 286  *
 287  * Revision 1.14  1995/03/30  12:18:17  quinn
 288  * Fixed bug.
 289  *
 290  * Revision 1.13  1995/03/30  09:09:24  quinn
 291  * Added state-handle and some support for asynchronous activities.
 292  *
 293  * Revision 1.12  1995/03/29  15:40:16  quinn
 294  * Ongoing work. Statserv is now dynamic by default
 295  *
 296  * Revision 1.11  1995/03/28  09:16:21  quinn
 297  * Added record packing to the search request
 298  *
 299  * Revision 1.10  1995/03/27  08:34:24  quinn
 300  * Added dynamic server functionality.
 301  * Released bindings to session.c (is now redundant)
 302  *
 303  * Revision 1.9  1995/03/22  15:01:26  quinn
 304  * Adjusting record packing.
 305  *
 306  * Revision 1.8  1995/03/22  10:13:21  quinn
 307  * Working on record packer
 308  *
 309  * Revision 1.7  1995/03/21  15:53:31  quinn
 310  * Little changes.
 311  *
 312  * Revision 1.6  1995/03/21  12:30:09  quinn
 313  * Beginning to add support for record packing.
 314  *
 315  * Revision 1.5  1995/03/17  10:44:13  quinn
 316  * Added catch of null-string in makediagrec
 317  *
 318  * Revision 1.4  1995/03/17  10:18:08  quinn
 319  * Added memory management.
 320  *
 321  * Revision 1.3  1995/03/16  17:42:39  quinn
 322  * Little changes
 323  *
 324  * Revision 1.2  1995/03/16  13:29:01  quinn
 325  * Partitioned server.
 326  *
 327  * Revision 1.1  1995/03/15  16:02:10  quinn
 328  * Modded session.c to seshigh.c
 329  *
 330  */
 331
 332 /*
 333  * Frontend server logic.
 334  *
 335  * This code receives incoming APDUs, and handles client requests by means
 336  * of the backend API.
 337  *
 338  * Some of the code is getting quite involved, compared to simpler servers -
 339  * primarily because it is asynchronous both in the communication with
 340  * the user and the backend. We think the complexity will pay off in
 341  * the form of greater flexibility when more asynchronous facilities
 342  * are implemented.
 343  *
 344  * Memory management has become somewhat involved. In the simple case, where
 345  * only one PDU is pending at a time, it will simply reuse the same memory,
 346  * once it has found its working size. When we enable multiple concurrent
 347  * operations, perhaps even with multiple parallel calls to the backend, it
 348  * will maintain a pool of buffers for encoding and decoding, trying to
 349  * minimize memory allocation/deallocation during normal operation.
 350  *
 351  * TODOs include (and will be done in order of public interest):
 352  *
 353  * Support for EXPLAIN - provide simple meta-database system.
 354  * Support for access control.
 355  * Support for resource control.
 356  * Support for extended services - primarily Item Order.
 357  * Rest of Z39.50-1994
 358  *
 359  */
 360
 361 #include <stdlib.h>
 362 #include <stdio.h>
 363 #ifdef WIN32
 364 #include <process.h>
 365 #else
 366 #include <unistd.h>
 367 #endif
 368 #include <assert.h>
 369
 370 #include <yaz/yconfig.h>
 371 #include <yaz/xmalloc.h>
 372 #include <yaz/comstack.h>
 373 #include "eventl.h"
 374 #include "session.h"
 375 #include <yaz/proto.h>
 376 #include <yaz/oid.h>
 377 #include <yaz/log.h>
 378 #include <yaz/logrpn.h>
 379 #include <yaz/statserv.h>
 380
 381 #include <yaz/backend.h>
 382
 383 static int process_request(association *assoc, request *req, char **msg);
 384 void backend_response(IOCHAN i, int event);
 385 static int process_response(association *assoc, request *req, Z_APDU *res);
 386 static Z_APDU *process_initRequest(association *assoc, request *reqb);
 387 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
 388     int *fd);
 389 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
 390     bend_search_rr *bsrr, int *fd);
 391 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
 392     int *fd);
 393 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
 394 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
 395 static void process_close(association *assoc, request *reqb);
 396 void save_referenceId (request *reqb, Z_ReferenceId *refid);
 397 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
 398     int *fd);
 399 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 400
 401 static FILE *apduf = 0; /* for use in static mode */
 402 static statserv_options_block *control_block = 0;
 403
 404 /* Chas: Added in from DALI */
 405 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 406 /* Chas: End of addition from DALI */
 407
 408 /*
 409  * Create and initialize a new association-handle.
 410  *  channel  : iochannel for the current line.
 411  *  link     : communications channel.
 412  * Returns: 0 or a new association handle.
 413  */
 414 association *create_association(IOCHAN channel, COMSTACK link)
 415 {
 416     association *anew;
 417
 418     if (!control_block)
 419         control_block = statserv_getcontrol();
 420     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 421         return 0;
 422     anew->init = 0;
 423     anew->client_chan = channel;
 424     anew->client_link = link;
 425     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 426         !(anew->encode = odr_createmem(ODR_ENCODE)))
 427         return 0;
 428     if (*control_block->apdufile)
 429     {
 430         char filename[256];
 431         FILE *f;
 432
 433         strcpy(filename, control_block->apdufile);
 434         if (!(anew->print = odr_createmem(ODR_PRINT)))
 435             return 0;
 436         if (*control_block->apdufile != '-')
 437         {
 438             strcpy(filename, control_block->apdufile);
 439             if (!control_block->dynamic)
 440             {
 441                 if (!apduf)
 442                 {
 443                     if (!(apduf = fopen(filename, "w")))
 444                     {
 445                         yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename);
 446                         return 0;
 447                     }
 448                     setvbuf(apduf, 0, _IONBF, 0);
 449                 }
 450                 f = apduf;
 451             }
 452             else
 453             {
 454                 sprintf(filename + strlen(filename), ".%d", getpid());
 455                 if (!(f = fopen(filename, "w")))
 456                 {
 457                     yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename);
 458                     return 0;
 459                 }
 460                 setvbuf(f, 0, _IONBF, 0);
 461             }
 462             odr_setprint(anew->print, f);
 463         }
 464     }
 465     else
 466         anew->print = 0;
 467     anew->input_buffer = 0;
 468     anew->input_buffer_len = 0;
 469     anew->backend = 0;
 470     anew->state = ASSOC_NEW;
 471     request_initq(&anew->incoming);
 472     request_initq(&anew->outgoing);
 473     anew->proto = cs_getproto(link);
 474     return anew;
 475 }
 476
 477 /*
 478  * Free association and release resources.
 479  */
 480 void destroy_association(association *h)
 481 {
 482     statserv_options_block *cb = statserv_getcontrol();
 483
 484     xfree(h->init);
 485     odr_destroy(h->decode);
 486     odr_destroy(h->encode);
 487     if (h->print)
 488         odr_destroy(h->print);
 489     if (h->input_buffer)
 490     xfree(h->input_buffer);
 491     if (h->backend)
 492         (*cb->bend_close)(h->backend);
 493     while (request_deq(&h->incoming));
 494     while (request_deq(&h->outgoing));
 495     request_delq(&h->incoming);
 496     request_delq(&h->outgoing);
 497     xfree(h);
 498     if (control_block && control_block->one_shot)
 499         exit (0);
 500 }
 501
 502 static void do_close_req(association *a, int reason, char *message,
 503                          request *req)
 504 {
 505     Z_APDU apdu;
 506     Z_Close *cls = zget_Close(a->encode);
 507
 508     /* Purge request queue */
 509     while (request_deq(&a->incoming));
 510     while (request_deq(&a->outgoing));
 511     if (a->version >= 3)
 512     {
 513         yaz_log(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
 514             reason, message ? message : "none");
 515         apdu.which = Z_APDU_close;
 516         apdu.u.close = cls;
 517         *cls->closeReason = reason;
 518         cls->diagnosticInformation = message;
 519         process_response(a, req, &apdu);
 520         iochan_settimeout(a->client_chan, 60);
 521     }
 522     else
 523     {
 524         yaz_log(LOG_DEBUG, "v2 client. No Close PDU");
 525         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 526     }
 527     a->state = ASSOC_DEAD;
 528 }
 529
 530 static void do_close(association *a, int reason, char *message)
 531 {
 532     do_close_req (a, reason, message, request_get(&a->outgoing));
 533 }
 534
 535 /*
 536  * This is where PDUs from the client are read and the further
 537  * processing is initiated. Flow of control moves down through the
 538  * various process_* functions below, until the encoded result comes back up
 539  * to the output handler in here.
 540  *
 541  *  h     : the I/O channel that has an outstanding event.
 542  *  event : the current outstanding event.
 543  */
 544 void ir_session(IOCHAN h, int event)
 545 {
 546     int res;
 547     association *assoc = (association *)iochan_getdata(h);
 548     COMSTACK conn = assoc->client_link;
 549     request *req;
 550
 551     assert(h && conn && assoc);
 552     if (event == EVENT_TIMEOUT)
 553     {
 554         if (assoc->state != ASSOC_UP)
 555         {
 556             yaz_log(LOG_LOG, "Final timeout - closing connection.");
 557             cs_close(conn);
 558             destroy_association(assoc);
 559             iochan_destroy(h);
 560         }
 561         else
 562         {
 563             yaz_log(LOG_LOG, "Session idle too long. Sending close.");
 564             do_close(assoc, Z_Close_lackOfActivity, 0);
 565         }
 566         return;
 567     }
 568     if (event & EVENT_INPUT || event & EVENT_WORK) /* input */
 569     {
 570         if (event & EVENT_INPUT)
 571         {
 572             yaz_log(LOG_DEBUG, "ir_session (input)");
 573             assert(assoc && conn);
 574             /* We aren't speaking to this fellow */
 575             if (assoc->state == ASSOC_DEAD)
 576             {
 577                 yaz_log(LOG_LOG, "Closed connection after reject");
 578                 cs_close(conn);
 579                 destroy_association(assoc);
 580                 iochan_destroy(h);
 581                 return;
 582             }
 583             if ((res = cs_get(conn, &assoc->input_buffer,
 584                 &assoc->input_buffer_len)) <= 0)
 585             {
 586                 yaz_log(LOG_LOG, "Connection closed by client");
 587                 cs_close(conn);
 588                 destroy_association(assoc);
 589                 iochan_destroy(h);
 590                 return;
 591             }
 592             else if (res == 1) /* incomplete read - wait for more  */
 593                 return;
 594             if (cs_more(conn)) /* more stuff - call us again later, please */
 595                 iochan_setevent(h, EVENT_INPUT);
 596
 597             /* we got a complete PDU. Let's decode it */
 598             yaz_log(LOG_DEBUG, "Got PDU, %d bytes", res);
 599             req = request_get(&assoc->incoming); /* get a new request structure */
 600             odr_reset(assoc->decode);
 601             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 602             if (!z_APDU(assoc->decode, &req->request, 0, 0))
 603             {
 604                 yaz_log(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ",
 605                     odr_errmsg(odr_geterror(assoc->decode)),
 606                     odr_offset(assoc->decode));
 607                 yaz_log(LOG_LOG, "PDU dump:");
 608                 odr_dumpBER(log_file(), assoc->input_buffer, res);
 609                 do_close(assoc, Z_Close_protocolError, "Malformed package");
 610                 return;
 611             }
 612             req->request_mem = odr_extract_mem(assoc->decode);
 613             if (assoc->print && !z_APDU(assoc->print, &req->request, 0, 0))
 614             {
 615                 yaz_log(LOG_WARN, "ODR print error: %s",
 616                     odr_errmsg(odr_geterror(assoc->print)));
 617                 odr_reset(assoc->print);
 618             }
 619             request_enq(&assoc->incoming, req);
 620         }
 621
 622         /* can we do something yet? */
 623         req = request_head(&assoc->incoming);
 624         if (req->state == REQUEST_IDLE)
 625         {
 626             char *msg;
 627             request_deq(&assoc->incoming);
 628             if (process_request(assoc, req, &msg) < 0)
 629                 do_close_req(assoc, Z_Close_systemProblem, msg, req);
 630         }
 631     }
 632     if (event & EVENT_OUTPUT)
 633     {
 634         request *req = request_head(&assoc->outgoing);
 635
 636         yaz_log(LOG_DEBUG, "ir_session (output)");
 637         req->state = REQUEST_PENDING;
 638         switch (res = cs_put(conn, req->response, req->len_response))
 639         {
 640             case -1:
 641                 yaz_log(LOG_LOG, "Connection closed by client");
 642                 cs_close(conn);
 643                 destroy_association(assoc);
 644                 iochan_destroy(h);
 645                 break;
 646             case 0: /* all sent - release the request structure */
 647                 yaz_log(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 648                 nmem_destroy(req->request_mem);
 649                 request_deq(&assoc->outgoing);
 650                 request_release(req);
 651                 if (!request_head(&assoc->outgoing))
 652                     iochan_clearflag(h, EVENT_OUTPUT);
 653                 break;
 654             /* value of 1 -- partial send -- is simply ignored */
 655         }
 656     }
 657     if (event & EVENT_EXCEPT)
 658     {
 659         yaz_log(LOG_DEBUG, "ir_session (exception)");
 660         cs_close(conn);
 661         destroy_association(assoc);
 662         iochan_destroy(h);
 663     }
 664 }
 665
 666 /*
 667  * Initiate request processing.
 668  */
 669 static int process_request(association *assoc, request *req, char **msg)
 670 {
 671     int fd = -1;
 672     Z_APDU *res;
 673     int retval;
 674
 675     *msg = "Unknown Error";
 676     assert(req && req->state == REQUEST_IDLE);
 677     if (req->request->which != Z_APDU_initRequest && !assoc->init)
 678     {
 679         *msg = "Missing InitRequest";
 680         return -1;
 681     }
 682     switch (req->request->which)
 683     {
 684     case Z_APDU_initRequest:
 685         res = process_initRequest(assoc, req); break;
 686     case Z_APDU_searchRequest:
 687         res = process_searchRequest(assoc, req, &fd); break;
 688     case Z_APDU_presentRequest:
 689         res = process_presentRequest(assoc, req, &fd); break;
 690     case Z_APDU_scanRequest:
 691         if (assoc->init->bend_scan)
 692             res = process_scanRequest(assoc, req, &fd);
 693         else
 694         {
 695             *msg = "Cannot handle Scan APDU";
 696             return -1;
 697         }
 698         break;
 699     case Z_APDU_extendedServicesRequest:
 700         if (assoc->init->bend_esrequest)
 701             res = process_ESRequest(assoc, req, &fd);
 702         else
 703         {
 704             *msg = "Cannot handle Extended Services APDU";
 705             return -1;
 706         }
 707         break;
 708     case Z_APDU_sortRequest:
 709         if (assoc->init->bend_sort)
 710             res = process_sortRequest(assoc, req, &fd);
 711         else
 712         {
 713             *msg = "Cannot handle Sort APDU";
 714             return -1;
 715         }
 716         break;
 717     case Z_APDU_close:
 718         process_close(assoc, req);
 719         return 0;
 720     case Z_APDU_deleteResultSetRequest:
 721         if (assoc->init->bend_delete)
 722             res = process_deleteRequest(assoc, req, &fd);
 723         else
 724         {
 725             *msg = "Cannot handle Delete APDU";
 726             return -1;
 727         }
 728         break;
 729     case Z_APDU_segmentRequest:
 730         if (assoc->init->bend_segment)
 731         {
 732             res = process_segmentRequest (assoc, req);
 733         }
 734         else
 735         {
 736             *msg = "Cannot handle Segment APDU";
 737             return -1;
 738         }
 739         break;
 740     default:
 741         *msg = "Bad APDU received";
 742         return -1;
 743     }
 744     if (res)
 745     {
 746         yaz_log(LOG_DEBUG, "  result immediately available");
 747         retval = process_response(assoc, req, res);
 748     }
 749     else if (fd < 0)
 750     {
 751         yaz_log(LOG_DEBUG, "  result unavailble");
 752         retval = 0;
 753     }
 754     else /* no result yet - one will be provided later */
 755     {
 756         IOCHAN chan;
 757
 758         /* Set up an I/O handler for the fd supplied by the backend */
 759
 760         yaz_log(LOG_DEBUG, "   establishing handler for result");
 761         req->state = REQUEST_PENDING;
 762         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
 763             abort();
 764         iochan_setdata(chan, assoc);
 765         retval = 0;
 766     }
 767     return retval;
 768 }
 769
 770 /*
 771  * Handle message from the backend.
 772  */
 773 void backend_response(IOCHAN i, int event)
 774 {
 775     association *assoc = (association *)iochan_getdata(i);
 776     request *req = request_head(&assoc->incoming);
 777     Z_APDU *res;
 778     int fd;
 779
 780     yaz_log(LOG_DEBUG, "backend_response");
 781     assert(assoc && req && req->state != REQUEST_IDLE);
 782     /* determine what it is we're waiting for */
 783     switch (req->request->which)
 784     {
 785         case Z_APDU_searchRequest:
 786             res = response_searchRequest(assoc, req, 0, &fd); break;
 787 #if 0
 788         case Z_APDU_presentRequest:
 789             res = response_presentRequest(assoc, req, 0, &fd); break;
 790         case Z_APDU_scanRequest:
 791             res = response_scanRequest(assoc, req, 0, &fd); break;
 792 #endif
 793         default:
 794             yaz_log(LOG_WARN, "Serious programmer's lapse or bug");
 795             abort();
 796     }
 797     if ((res && process_response(assoc, req, res) < 0) || fd < 0)
 798     {
 799         yaz_log(LOG_LOG, "Fatal error when talking to backend");
 800         do_close(assoc, Z_Close_systemProblem, 0);
 801         iochan_destroy(i);
 802         return;
 803     }
 804     else if (!res) /* no result yet - try again later */
 805     {
 806         yaz_log(LOG_DEBUG, "   no result yet");
 807         iochan_setfd(i, fd); /* in case fd has changed */
 808     }
 809 }
 810
 811 /*
 812  * Encode response, and transfer the request structure to the outgoing queue.
 813  */
 814 static int process_response(association *assoc, request *req, Z_APDU *res)
 815 {
 816     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
 817     if (!z_APDU(assoc->encode, &res, 0, 0))
 818     {
 819         yaz_log(LOG_WARN, "ODR error when encoding response: %s",
 820             odr_errmsg(odr_geterror(assoc->decode)));
 821         odr_reset(assoc->encode);
 822         return -1;
 823     }
 824     req->response = odr_getbuf(assoc->encode, &req->len_response,
 825         &req->size_response);
 826     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
 827     if (assoc->print && !z_APDU(assoc->print, &res, 0, 0))
 828     {
 829         yaz_log(LOG_WARN, "ODR print error: %s",
 830             odr_errmsg(odr_geterror(assoc->print)));
 831         odr_reset(assoc->print);
 832     }
 833     odr_reset(assoc->encode);
 834     req->state = REQUEST_IDLE;
 835     request_enq(&assoc->outgoing, req);
 836     /* turn the work over to the ir_session handler */
 837     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
 838     /* Is there more work to be done? give that to the input handler too */
 839 #if 1
 840     if (request_head(&assoc->incoming))
 841     {
 842         yaz_log (LOG_DEBUG, "more work to be done");
 843         iochan_setevent(assoc->client_chan, EVENT_WORK);
 844     }
 845 #endif
 846     return 0;
 847 }
 848
 849 /*
 850  * Handle init request.
 851  * At the moment, we don't check the options
 852  * anywhere else in the code - we just try not to do anything that would
 853  * break a naive client. We'll toss 'em into the association block when
 854  * we need them there.
 855  */
 856 static Z_APDU *process_initRequest(association *assoc, request *reqb)
 857 {
 858     statserv_options_block *cb = statserv_getcontrol();
 859     Z_InitRequest *req = reqb->request->u.initRequest;
 860     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
 861     Z_InitResponse *resp = apdu->u.initResponse;
 862     bend_initresult *binitres;
 863     char options[100];
 864
 865     xfree (assoc->init);
 866     assoc->init = xmalloc (sizeof(*assoc->init));
 867
 868     yaz_log(LOG_LOG, "Got initRequest");
 869     if (req->implementationId)
 870         yaz_log(LOG_LOG, "Id:        %s", req->implementationId);
 871     if (req->implementationName)
 872         yaz_log(LOG_LOG, "Name:      %s", req->implementationName);
 873     if (req->implementationVersion)
 874         yaz_log(LOG_LOG, "Version:   %s", req->implementationVersion);
 875
 876     assoc->init->stream = assoc->encode;
 877     assoc->init->print = assoc->print;
 878     assoc->init->auth = req->idAuthentication;
 879     assoc->init->referenceId = req->referenceId;
 880     assoc->init->implementation_version = 0;
 881     assoc->init->implementation_name = 0;
 882     assoc->init->bend_sort = NULL;
 883     assoc->init->bend_search = NULL;
 884     assoc->init->bend_present = NULL;
 885     assoc->init->bend_esrequest = NULL;
 886     assoc->init->bend_delete = NULL;
 887     assoc->init->bend_scan = NULL;
 888     assoc->init->bend_segment = NULL;
 889     assoc->init->bend_fetch = NULL;
 890     if (!(binitres = (*cb->bend_init)(assoc->init)))
 891     {
 892         yaz_log(LOG_WARN, "Bad response from backend.");
 893         return 0;
 894     }
 895
 896     assoc->backend = binitres->handle;
 897     if ((assoc->init->bend_sort))
 898         yaz_log (LOG_DEBUG, "Sort handler installed");
 899     if ((assoc->init->bend_search))
 900         yaz_log (LOG_DEBUG, "Search handler installed");
 901     if ((assoc->init->bend_present))
 902         yaz_log (LOG_DEBUG, "Present handler installed");
 903     if ((assoc->init->bend_esrequest))
 904         yaz_log (LOG_DEBUG, "ESRequest handler installed");
 905     if ((assoc->init->bend_delete))
 906         yaz_log (LOG_DEBUG, "Delete handler installed");
 907     if ((assoc->init->bend_scan))
 908         yaz_log (LOG_DEBUG, "Scan handler installed");
 909     if ((assoc->init->bend_segment))
 910         yaz_log (LOG_DEBUG, "Segment handler installed");
 911
 912     resp->referenceId = req->referenceId;
 913     *options = '\0';
 914     /* let's tell the client what we can do */
 915     if (ODR_MASK_GET(req->options, Z_Options_search))
 916     {
 917         ODR_MASK_SET(resp->options, Z_Options_search);
 918         strcat(options, "srch");
 919     }
 920     if (ODR_MASK_GET(req->options, Z_Options_present))
 921     {
 922         ODR_MASK_SET(resp->options, Z_Options_present);
 923         strcat(options, " prst");
 924     }
 925     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
 926         assoc->init->bend_delete)
 927     {
 928         ODR_MASK_SET(resp->options, Z_Options_delSet);
 929         strcat(options, " del");
 930     }
 931     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
 932         assoc->init->bend_esrequest)
 933     {
 934         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
 935         strcat (options, " extendedServices");
 936     }
 937     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
 938     {
 939         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
 940         strcat(options, " namedresults");
 941     }
 942     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
 943     {
 944         ODR_MASK_SET(resp->options, Z_Options_scan);
 945         strcat(options, " scan");
 946     }
 947     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
 948     {
 949         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
 950         strcat(options, " concurop");
 951     }
 952     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
 953     {
 954         ODR_MASK_SET(resp->options, Z_Options_sort);
 955         strcat(options, " sort");
 956     }
 957     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
 958     {
 959         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
 960         assoc->version = 2; /* 1 & 2 are equivalent */
 961     }
 962     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
 963     {
 964         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
 965         assoc->version = 2;
 966     }
 967     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
 968     {
 969         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
 970         assoc->version = 3;
 971     }
 972     yaz_log(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
 973     assoc->maximumRecordSize = *req->maximumRecordSize;
 974     if (assoc->maximumRecordSize > control_block->maxrecordsize)
 975         assoc->maximumRecordSize = control_block->maxrecordsize;
 976     assoc->preferredMessageSize = *req->preferredMessageSize;
 977     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
 978         assoc->preferredMessageSize = assoc->maximumRecordSize;
 979     resp->preferredMessageSize = &assoc->preferredMessageSize;
 980     resp->maximumRecordSize = &assoc->maximumRecordSize;
 981
 982     resp->implementationName = "GFS";
 983
 984     if (assoc->init->implementation_name)
 985     {
 986         char *nv = (char *)
 987             odr_malloc (assoc->encode,
 988                         strlen(assoc->init->implementation_name) + 10 +
 989                                strlen(resp->implementationName));
 990         sprintf (nv, "%s / %s",
 991                  resp->implementationName, assoc->init->implementation_name);
 992         resp->implementationName = nv;
 993     }
 994     if (assoc->init->implementation_version)
 995     {
 996         char *nv = (char *)
 997             odr_malloc (assoc->encode,
 998                         strlen(assoc->init->implementation_version) + 10 +
 999                                strlen(resp->implementationVersion));
1000         sprintf (nv, "YAZ %s / %s",
1001                  resp->implementationVersion,
1002                  assoc->init->implementation_version);
1003         resp->implementationVersion = nv;
1004     }
1005
1006     if (binitres->errcode)
1007     {
1008         yaz_log(LOG_LOG, "Connection rejected by backend.");
1009         *resp->result = 0;
1010         assoc->state = ASSOC_DEAD;
1011     }
1012     else
1013         assoc->state = ASSOC_UP;
1014     return apdu;
1015 }
1016
1017 /*
1018  * These functions should be merged.
1019  */
1020
1021 static void set_addinfo (Z_DefaultDiagFormat *dr, char *addinfo)
1022 {
1023 #if ASN_COMPILED
1024     dr->which = Z_DefaultDiagFormat_v2Addinfo;
1025     dr->u.v2Addinfo = addinfo ? addinfo : "";
1026 #else
1027     dr->which = Z_DiagForm_v2AddInfo;
1028     dr->addinfo = addinfo ? addinfo : "";
1029 #endif
1030 }
1031
1032 /*
1033  * nonsurrogate diagnostic record.
1034  */
1035 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
1036 {
1037     int oid[OID_SIZE];
1038     Z_Records *rec = (Z_Records *)
1039         odr_malloc (assoc->encode, sizeof(*rec));
1040     oident bib1;
1041     int *err = (int *)
1042         odr_malloc (assoc->encode, sizeof(*err));
1043     Z_DiagRec *drec = (Z_DiagRec *)
1044         odr_malloc (assoc->encode, sizeof(*drec));
1045     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1046         odr_malloc (assoc->encode, sizeof(*dr));
1047
1048     bib1.proto = assoc->proto;
1049     bib1.oclass = CLASS_DIAGSET;
1050     bib1.value = VAL_BIB1;
1051
1052     yaz_log(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo :
1053         "NULL");
1054     *err = error;
1055     rec->which = Z_Records_NSD;
1056 #if ASN_COMPILED
1057     rec->u.nonSurrogateDiagnostic = dr;
1058 #else
1059     rec->u.nonSurrogateDiagnostic = drec;
1060     drec->which = Z_DiagRec_defaultFormat;
1061     drec->u.defaultFormat = dr;
1062 #endif
1063     dr->diagnosticSetId =
1064         odr_oiddup (assoc->encode, oid_ent_to_oid(&bib1, oid));
1065     dr->condition = err;
1066     set_addinfo (dr, addinfo);
1067     return rec;
1068 }
1069
1070 /*
1071  * surrogate diagnostic.
1072  */
1073 static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname,
1074                                           int error, char *addinfo)
1075 {
1076     int oid[OID_SIZE];
1077     Z_NamePlusRecord *rec = (Z_NamePlusRecord *)
1078         odr_malloc (assoc->encode, sizeof(*rec));
1079     int *err = (int *)odr_malloc (assoc->encode, sizeof(*err));
1080     oident bib1;
1081     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
1082     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1083         odr_malloc (assoc->encode, sizeof(*dr));
1084
1085     bib1.proto = assoc->proto;
1086     bib1.oclass = CLASS_DIAGSET;
1087     bib1.value = VAL_BIB1;
1088
1089     yaz_log(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
1090     *err = error;
1091     rec->databaseName = dbname;
1092     rec->which = Z_NamePlusRecord_surrogateDiagnostic;
1093     rec->u.surrogateDiagnostic = drec;
1094     drec->which = Z_DiagRec_defaultFormat;
1095     drec->u.defaultFormat = dr;
1096     dr->diagnosticSetId = odr_oiddup (assoc->encode,
1097                                       oid_ent_to_oid(&bib1, oid));
1098     dr->condition = err;
1099     set_addinfo (dr, addinfo);
1100
1101     return rec;
1102 }
1103
1104 /*
1105  * multiple nonsurrogate diagnostics.
1106  */
1107 static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo)
1108 {
1109     int oid[OID_SIZE];
1110     Z_DiagRecs *recs = (Z_DiagRecs *)odr_malloc (assoc->encode, sizeof(*recs));
1111     int *err = (int *)odr_malloc (assoc->encode, sizeof(*err));
1112     oident bib1;
1113     Z_DiagRec **recp = (Z_DiagRec **)odr_malloc (assoc->encode, sizeof(*recp));
1114     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
1115     Z_DefaultDiagFormat *rec = (Z_DefaultDiagFormat *)odr_malloc (assoc->encode, sizeof(*rec));
1116
1117     yaz_log(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo ? addinfo : "");
1118     bib1.proto = assoc->proto;
1119     bib1.oclass = CLASS_DIAGSET;
1120     bib1.value = VAL_BIB1;
1121
1122     *err = error;
1123     recs->num_diagRecs = 1;
1124     recs->diagRecs = recp;
1125     recp[0] = drec;
1126     drec->which = Z_DiagRec_defaultFormat;
1127     drec->u.defaultFormat = rec;
1128
1129     rec->diagnosticSetId = odr_oiddup (assoc->encode,
1130                                       oid_ent_to_oid(&bib1, oid));
1131     rec->condition = err;
1132
1133 #ifdef ASN_COMPILED
1134     rec->which = Z_DefaultDiagFormat_v2Addinfo;
1135     rec->u.v2Addinfo = addinfo ? addinfo : "";
1136 #else
1137     rec->which = Z_DiagForm_v2AddInfo;
1138     rec->addinfo = addinfo ? addinfo : "";
1139 #endif
1140     return recs;
1141 }
1142
1143 static Z_Records *pack_records(association *a, char *setname, int start,
1144                                int *num, Z_RecordComposition *comp,
1145                                int *next, int *pres, oid_value format,
1146                                Z_ReferenceId *referenceId,
1147                                int *oid)
1148 {
1149     int recno, total_length = 0, toget = *num, dumped_records = 0;
1150     Z_Records *records =
1151         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
1152     Z_NamePlusRecordList *reclist =
1153         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
1154     Z_NamePlusRecord **list =
1155         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
1156
1157     records->which = Z_Records_DBOSD;
1158     records->u.databaseOrSurDiagnostics = reclist;
1159     reclist->num_records = 0;
1160     reclist->records = list;
1161     *pres = Z_PRES_SUCCESS;
1162     *num = 0;
1163     *next = 0;
1164
1165     yaz_log(LOG_LOG, "Request to pack %d+%d", start, toget);
1166     yaz_log(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
1167         a->maximumRecordSize);
1168     for (recno = start; reclist->num_records < toget; recno++)
1169     {
1170         bend_fetch_rr freq;
1171         Z_NamePlusRecord *thisrec;
1172         int this_length = 0;
1173         /*
1174          * we get the number of bytes allocated on the stream before any
1175          * allocation done by the backend - this should give us a reasonable
1176          * idea of the total size of the data so far.
1177          */
1178         total_length = odr_total(a->encode) - dumped_records;
1179         freq.errcode = 0;
1180         freq.errstring = 0;
1181         freq.basename = 0;
1182         freq.len = 0;
1183         freq.record = 0;
1184         freq.last_in_set = 0;
1185         freq.setname = setname;
1186         freq.surrogate_flag = 0;
1187         freq.number = recno;
1188         freq.comp = comp;
1189         freq.request_format = format;
1190         freq.record_syntax = oid;
1191         freq.output_format = 0;
1192         freq.stream = a->encode;
1193         freq.print = a->print;
1194         freq.surrogate_flag = 0;
1195         freq.referenceId = referenceId;
1196         (*a->init->bend_fetch)(a->backend, &freq);
1197         /* backend should be able to signal whether error is system-wide
1198            or only pertaining to current record */
1199         if (freq.errcode)
1200         {
1201             if (!freq.surrogate_flag)
1202             {
1203                 *pres = Z_PRES_FAILURE;
1204                 return diagrec(a, freq.errcode, freq.errstring);
1205             }
1206             reclist->records[reclist->num_records] =
1207                 surrogatediagrec(a, freq.basename, freq.errcode,
1208                                  freq.errstring);
1209             reclist->num_records++;
1210             *next = freq.last_in_set ? 0 : recno + 1;
1211             continue;
1212         }
1213         if (freq.len >= 0)
1214             this_length = freq.len;
1215         else
1216             this_length = odr_total(a->encode) - total_length;
1217         yaz_log(LOG_DEBUG, "  fetched record, len=%d, total=%d",
1218             this_length, total_length);
1219         if (this_length + total_length > a->preferredMessageSize)
1220         {
1221             /* record is small enough, really */
1222             if (this_length <= a->preferredMessageSize)
1223             {
1224                 yaz_log(LOG_DEBUG, "  Dropped last normal-sized record");
1225                 *pres = Z_PRES_PARTIAL_2;
1226                 break;
1227             }
1228             /* record can only be fetched by itself */
1229             if (this_length < a->maximumRecordSize)
1230             {
1231                 yaz_log(LOG_DEBUG, "  Record > prefmsgsz");
1232                 if (toget > 1)
1233                 {
1234                     yaz_log(LOG_DEBUG, "  Dropped it");
1235                     reclist->records[reclist->num_records] =
1236                          surrogatediagrec(a, freq.basename, 16, 0);
1237                     reclist->num_records++;
1238                     *next = freq.last_in_set ? 0 : recno + 1;
1239                     dumped_records += this_length;
1240                     continue;
1241                 }
1242             }
1243             else /* too big entirely */
1244             {
1245                 yaz_log(LOG_DEBUG, "Record > maxrcdsz");
1246                 reclist->records[reclist->num_records] =
1247                     surrogatediagrec(a, freq.basename, 17, 0);
1248                 reclist->num_records++;
1249                 *next = freq.last_in_set ? 0 : recno + 1;
1250                 dumped_records += this_length;
1251                 continue;
1252             }
1253         }
1254
1255         if (!(thisrec = (Z_NamePlusRecord *)
1256               odr_malloc(a->encode, sizeof(*thisrec))))
1257             return 0;
1258         if (!(thisrec->databaseName = (char *)odr_malloc(a->encode,
1259             strlen(freq.basename) + 1)))
1260             return 0;
1261         strcpy(thisrec->databaseName, freq.basename);
1262         thisrec->which = Z_NamePlusRecord_databaseRecord;
1263         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
1264                                                  freq.record, freq.len);
1265         if (!thisrec->u.databaseRecord)
1266             return 0;
1267         reclist->records[reclist->num_records] = thisrec;
1268         reclist->num_records++;
1269         *next = freq.last_in_set ? 0 : recno + 1;
1270     }
1271     *num = reclist->num_records;
1272     return records;
1273 }
1274
1275 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
1276     int *fd)
1277 {
1278     Z_SearchRequest *req = reqb->request->u.searchRequest;
1279     bend_search_rr *bsrr =
1280         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
1281
1282     yaz_log(LOG_LOG, "Got SearchRequest.");
1283     bsrr->fd = fd;
1284     bsrr->request = reqb;
1285     bsrr->association = assoc;
1286     bsrr->referenceId = req->referenceId;
1287     save_referenceId (reqb, bsrr->referenceId);
1288
1289     yaz_log (LOG_LOG, "ResultSet '%s'", req->resultSetName);
1290     if (req->databaseNames)
1291     {
1292         int i;
1293         for (i = 0; i < req->num_databaseNames; i++)
1294             yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1295     }
1296     switch (req->query->which)
1297     {
1298     case Z_Query_type_1: case Z_Query_type_101:
1299         log_rpn_query (req->query->u.type_1);
1300     }
1301     if (assoc->init->bend_search)
1302     {
1303         bsrr->setname = req->resultSetName;
1304         bsrr->replace_set = *req->replaceIndicator;
1305         bsrr->num_bases = req->num_databaseNames;
1306         bsrr->basenames = req->databaseNames;
1307         bsrr->query = req->query;
1308         bsrr->stream = assoc->encode;
1309         bsrr->decode = assoc->decode;
1310         bsrr->print = assoc->print;
1311         bsrr->errcode = 0;
1312         bsrr->hits = 0;
1313         bsrr->errstring = NULL;
1314         (assoc->init->bend_search)(assoc->backend, bsrr);
1315         if (!bsrr->request)
1316             return 0;
1317     }
1318 #if 0
1319     else
1320     {
1321         bend_searchrequest bsrq;
1322         bend_searchresult *bsrt;
1323
1324         bsrq.setname = req->resultSetName;
1325         bsrq.replace_set = *req->replaceIndicator;
1326         bsrq.num_bases = req->num_databaseNames;
1327         bsrq.basenames = req->databaseNames;
1328         bsrq.query = req->query;
1329         bsrq.referenceId = req->referenceId;
1330         bsrq.stream = assoc->encode;
1331         bsrq.decode = assoc->decode;
1332         bsrq.print = assoc->print;
1333         if (!(bsrt = bend_search (assoc->backend, &bsrq, fd)))
1334             return 0;
1335         bsrr->hits = bsrt->hits;
1336         bsrr->errcode = bsrt->errcode;
1337         bsrr->errstring = bsrt->errstring;
1338     }
1339 #endif
1340     return response_searchRequest(assoc, reqb, bsrr, fd);
1341 }
1342
1343 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
1344
1345 /*
1346  * Prepare a searchresponse based on the backend results. We probably want
1347  * to look at making the fetching of records nonblocking as well, but
1348  * so far, we'll keep things simple.
1349  * If bsrt is null, that means we're called in response to a communications
1350  * event, and we'll have to get the response for ourselves.
1351  */
1352 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
1353     bend_search_rr *bsrt, int *fd)
1354 {
1355     Z_SearchRequest *req = reqb->request->u.searchRequest;
1356     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1357     Z_SearchResponse *resp = (Z_SearchResponse *)
1358         odr_malloc (assoc->encode, sizeof(*resp));
1359     int *nulint = (int *)odr_malloc (assoc->encode, sizeof(*nulint));
1360     bool_t *sr = (bool_t *)odr_malloc (assoc->encode, sizeof(*sr));
1361     int *next = (int *)odr_malloc (assoc->encode, sizeof(*next));
1362     int *none = (int *)odr_malloc (assoc->encode, sizeof(*none));
1363
1364     *nulint = 0;
1365     *sr = 1;
1366     *next = 0;
1367     *none = Z_RES_NONE;
1368
1369     apdu->which = Z_APDU_searchResponse;
1370     apdu->u.searchResponse = resp;
1371     resp->referenceId = req->referenceId;
1372     resp->additionalSearchInfo = 0;
1373     resp->otherInfo = 0;
1374     *fd = -1;
1375     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
1376     {
1377         yaz_log(LOG_FATAL, "Bad result from backend");
1378         return 0;
1379     }
1380     else if (bsrt->errcode)
1381     {
1382         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
1383         resp->resultCount = nulint;
1384         resp->numberOfRecordsReturned = nulint;
1385         resp->nextResultSetPosition = nulint;
1386         resp->searchStatus = nulint;
1387         resp->resultSetStatus = none;
1388         resp->presentStatus = 0;
1389     }
1390     else
1391     {
1392         int *toget = (int *)odr_malloc (assoc->encode, sizeof(*toget));
1393         int *presst = (int *)odr_malloc (assoc->encode, sizeof(*presst));
1394         Z_RecordComposition comp, *compp = 0;
1395
1396         *toget = 0;
1397         *presst = 0;
1398         resp->records = 0;
1399         resp->resultCount = &bsrt->hits;
1400
1401         comp.which = Z_RecordComp_simple;
1402         /* how many records does the user agent want, then? */
1403         if (bsrt->hits <= *req->smallSetUpperBound)
1404         {
1405             *toget = bsrt->hits;
1406             if ((comp.u.simple = req->smallSetElementSetNames))
1407                 compp = &comp;
1408         }
1409         else if (bsrt->hits < *req->largeSetLowerBound)
1410         {
1411             *toget = *req->mediumSetPresentNumber;
1412             if (*toget > bsrt->hits)
1413                 *toget = bsrt->hits;
1414             if ((comp.u.simple = req->mediumSetElementSetNames))
1415                 compp = &comp;
1416         }
1417         else
1418             *toget = 0;
1419
1420         if (*toget && !resp->records)
1421         {
1422             oident *prefformat;
1423             oid_value form;
1424
1425             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
1426                 prefformat->oclass != CLASS_RECSYN)
1427                 form = VAL_NONE;
1428             else
1429                 form = prefformat->value;
1430             resp->records = pack_records(assoc, req->resultSetName, 1,
1431                 toget, compp, next, presst, form, req->referenceId,
1432                                          req->preferredRecordSyntax);
1433             if (!resp->records)
1434                 return 0;
1435             resp->numberOfRecordsReturned = toget;
1436             resp->nextResultSetPosition = next;
1437             resp->searchStatus = sr;
1438             resp->resultSetStatus = 0;
1439             resp->presentStatus = presst;
1440         }
1441         else
1442         {
1443             if (*resp->resultCount)
1444                 *next = 1;
1445             resp->numberOfRecordsReturned = nulint;
1446             resp->nextResultSetPosition = next;
1447             resp->searchStatus = sr;
1448             resp->resultSetStatus = 0;
1449             resp->presentStatus = 0;
1450         }
1451     }
1452     return apdu;
1453 }
1454
1455 /*
1456  * Maybe we got a little over-friendly when we designed bend_fetch to
1457  * get only one record at a time. Some backends can optimise multiple-record
1458  * fetches, and at any rate, there is some overhead involved in
1459  * all that selecting and hopping around. Problem is, of course, that the
1460  * frontend can't know ahead of time how many records it'll need to
1461  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
1462  * is downright lousy as a bulk data transfer protocol.
1463  *
1464  * To start with, we'll do the fetching of records from the backend
1465  * in one operation: To save some trips in and out of the event-handler,
1466  * and to simplify the interface to pack_records. At any rate, asynch
1467  * operation is more fun in operations that have an unpredictable execution
1468  * speed - which is normally more true for search than for present.
1469  */
1470 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
1471                                       int *fd)
1472 {
1473     Z_PresentRequest *req = reqb->request->u.presentRequest;
1474     oident *prefformat;
1475     oid_value form;
1476     Z_APDU *apdu;
1477     Z_PresentResponse *resp;
1478     int *presst;
1479     int *next;
1480     int *num;
1481
1482     yaz_log(LOG_LOG, "Got PresentRequest.");
1483
1484     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
1485         prefformat->oclass != CLASS_RECSYN)
1486         form = VAL_NONE;
1487     else
1488         form = prefformat->value;
1489     if (assoc->init->bend_present)
1490     {
1491         bend_present_rr *bprr = (bend_present_rr *)
1492             nmem_malloc (reqb->request_mem, sizeof(*bprr));
1493         bprr->setname = req->resultSetId;
1494         bprr->start = *req->resultSetStartPoint;
1495         bprr->number = *req->numberOfRecordsRequested;
1496         bprr->format = form;
1497         bprr->record_syntax = req->preferredRecordSyntax;
1498         bprr->comp = req->recordComposition;
1499         bprr->referenceId = req->referenceId;
1500         bprr->stream = assoc->encode;
1501         bprr->print = assoc->print;
1502         bprr->request = reqb;
1503         bprr->association = assoc;
1504         bprr->errcode = 0;
1505         bprr->errstring = NULL;
1506         (*assoc->init->bend_present)(assoc->backend, bprr);
1507
1508         if (!bprr->request)
1509             return 0;
1510     }
1511     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1512     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
1513     presst = (int *)odr_malloc (assoc->encode, sizeof(*presst));
1514     next = (int *)odr_malloc (assoc->encode, sizeof(*next));
1515     num = (int *)odr_malloc (assoc->encode, sizeof(*num));
1516     *presst = 0;
1517     *next = 0;
1518     *num = *req->numberOfRecordsRequested;
1519
1520     apdu->which = Z_APDU_presentResponse;
1521     apdu->u.presentResponse = resp;
1522     resp->referenceId = req->referenceId;
1523     resp->otherInfo = 0;
1524
1525     resp->records =
1526         pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
1527                      num, req->recordComposition, next, presst, form,
1528                      req->referenceId, req->preferredRecordSyntax);
1529     if (!resp->records)
1530         return 0;
1531     resp->numberOfRecordsReturned = num;
1532     resp->presentStatus = presst;
1533     resp->nextResultSetPosition = next;
1534
1535     return apdu;
1536 }
1537
1538 #if 0
1539 static int bend_default_scan (void *handle, bend_scan_rr *rr)
1540 {
1541     bend_scanrequest srq;
1542     bend_scanresult *srs;
1543
1544     srq.num_bases = rr->num_bases;
1545     srq.basenames = rr->basenames;
1546     srq.attributeset = rr->attributeset;
1547     srq.referenceId = rr->referenceId;
1548     srq.term = rr->term;
1549     srq.term_position = rr->term_position;
1550     srq.num_entries = rr->num_entries;
1551     srq.stream = rr->stream;
1552     srq.print = rr->print;
1553
1554     srs = bend_scan(handle, &srq, 0);
1555
1556     rr->term_position = srs->term_position;
1557     rr->num_entries = srs->num_entries;
1558     rr->entries = srs->entries;
1559     rr->status = srs->status;
1560     rr->errcode = srs->errcode;
1561     rr->errstring = srs->errstring;
1562     return 0;
1563 }
1564 #endif
1565
1566 /*
1567  * Scan was implemented rather in a hurry, and with support for only the basic
1568  * elements of the service in the backend API. Suggestions are welcome.
1569  */
1570 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
1571 {
1572     Z_ScanRequest *req = reqb->request->u.scanRequest;
1573     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1574     Z_ScanResponse *res = (Z_ScanResponse *)
1575         odr_malloc (assoc->encode, sizeof(*res));
1576     int *scanStatus = (int *)
1577         odr_malloc (assoc->encode, sizeof(*scanStatus));
1578     int *numberOfEntriesReturned = (int *)
1579         odr_malloc (assoc->encode, sizeof(*numberOfEntriesReturned));
1580     Z_ListEntries *ents = (Z_ListEntries *)
1581         odr_malloc (assoc->encode, sizeof(*ents));
1582     Z_DiagRecs *diagrecs_p = NULL;
1583     oident *attent;
1584     oident *attset;
1585
1586     yaz_log(LOG_LOG, "Got ScanRequest");
1587     *scanStatus = Z_Scan_failure;
1588     *numberOfEntriesReturned = 0;
1589
1590     apdu->which = Z_APDU_scanResponse;
1591     apdu->u.scanResponse = res;
1592     res->referenceId = req->referenceId;
1593     res->stepSize = 0;
1594     res->scanStatus = scanStatus;
1595     res->numberOfEntriesReturned = numberOfEntriesReturned;
1596     res->positionOfTerm = 0;
1597     res->entries = ents;
1598     ents->num_entries = 0;
1599     ents->entries = NULL;
1600     ents->num_nonsurrogateDiagnostics = 0;
1601     ents->nonsurrogateDiagnostics = NULL;
1602     res->attributeSet = 0;
1603     res->otherInfo = 0;
1604
1605     if (req->attributeSet && (!(attent = oid_getentbyoid(req->attributeSet)) ||
1606                               attent->oclass != CLASS_ATTSET
1607                               || attent->value != VAL_BIB1))
1608         diagrecs_p = diagrecs(assoc, 121, 0);
1609     else if (req->stepSize && *req->stepSize > 0)
1610         diagrecs_p = diagrecs(assoc, 205, 0);
1611     else
1612     {
1613         bend_scan_rr *bsrr = (bend_scan_rr *)
1614             odr_malloc (assoc->encode, sizeof(*bsrr));
1615         if (req->databaseNames)
1616         {
1617             int i;
1618             for (i = 0; i < req->num_databaseNames; i++)
1619                 yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1620         }
1621         bsrr->num_bases = req->num_databaseNames;
1622         bsrr->basenames = req->databaseNames;
1623         bsrr->num_entries = *req->numberOfTermsRequested;
1624         bsrr->term = req->termListAndStartPoint;
1625         bsrr->referenceId = req->referenceId;
1626         bsrr->stream = assoc->encode;
1627         bsrr->print = assoc->print;
1628         if (!(attset = oid_getentbyoid(req->attributeSet)) ||
1629             attset->oclass != CLASS_RECSYN)
1630             bsrr->attributeset = VAL_NONE;
1631         else
1632             bsrr->attributeset = attset->value;
1633         log_scan_term (req->termListAndStartPoint, attset->value);
1634         bsrr->term_position = req->preferredPositionInResponse ?
1635             *req->preferredPositionInResponse : 1;
1636         ((int (*)(void *, bend_scan_rr *))
1637          (*assoc->init->bend_scan))(assoc->backend, bsrr);
1638         if (bsrr->errcode)
1639             diagrecs_p = diagrecs(assoc, bsrr->errcode, bsrr->errstring);
1640         else
1641         {
1642             int i;
1643             Z_Entry **tab = (Z_Entry **)
1644                 odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
1645
1646             if (bsrr->status == BEND_SCAN_PARTIAL)
1647                 *scanStatus = Z_Scan_partial_5;
1648             else
1649                 *scanStatus = Z_Scan_success;
1650             ents->entries = tab;
1651             ents->num_entries = bsrr->num_entries;
1652             res->numberOfEntriesReturned = &ents->num_entries;
1653             res->positionOfTerm = &bsrr->term_position;
1654             for (i = 0; i < bsrr->num_entries; i++)
1655             {
1656                 Z_Entry *e;
1657                 Z_TermInfo *t;
1658                 Odr_oct *o;
1659
1660                 tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
1661                 if (bsrr->entries[i].occurrences >= 0)
1662                 {
1663                     e->which = Z_Entry_termInfo;
1664                     e->u.termInfo = t = (Z_TermInfo *)
1665                         odr_malloc(assoc->encode, sizeof(*t));
1666                     t->suggestedAttributes = 0;
1667                     t->displayTerm = 0;
1668                     t->alternativeTerm = 0;
1669                     t->byAttributes = 0;
1670                     t->otherTermInfo = 0;
1671                     t->globalOccurrences = &bsrr->entries[i].occurrences;
1672                     t->term = (Z_Term *)
1673                         odr_malloc(assoc->encode, sizeof(*t->term));
1674                     t->term->which = Z_Term_general;
1675                     t->term->u.general = o =
1676                         (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
1677                     o->buf = (unsigned char *)
1678                         odr_malloc(assoc->encode, o->len = o->size =
1679                                    strlen(bsrr->entries[i].term));
1680                     memcpy(o->buf, bsrr->entries[i].term, o->len);
1681                     yaz_log(LOG_DEBUG, "  term #%d: '%s' (%d)", i,
1682                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
1683                 }
1684                 else
1685                 {
1686                     Z_DiagRecs *drecs = diagrecs (assoc,
1687                                                   bsrr->entries[i].errcode,
1688                                                   bsrr->entries[i].errstring);
1689                     assert (drecs->num_diagRecs == 1);
1690                     e->which = Z_Entry_surrogateDiagnostic;
1691                     assert (drecs->diagRecs[0]);
1692                     e->u.surrogateDiagnostic = drecs->diagRecs[0];
1693                 }
1694             }
1695         }
1696     }
1697     if (diagrecs_p)
1698     {
1699         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
1700         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
1701     }
1702     return apdu;
1703 }
1704
1705 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
1706     int *fd)
1707 {
1708     Z_SortRequest *req = reqb->request->u.sortRequest;
1709     Z_SortResponse *res = (Z_SortResponse *)
1710         odr_malloc (assoc->encode, sizeof(*res));
1711     bend_sort_rr *bsrr = (bend_sort_rr *)
1712         odr_malloc (assoc->encode, sizeof(*bsrr));
1713
1714     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1715
1716     yaz_log(LOG_LOG, "Got SortRequest.");
1717
1718 #ifdef ASN_COMPILED
1719     bsrr->num_input_setnames = req->num_inputResultSetNames;
1720     bsrr->input_setnames = req->inputResultSetNames;
1721 #else
1722     bsrr->num_input_setnames = req->inputResultSetNames->num_strings;
1723     bsrr->input_setnames = req->inputResultSetNames->strings;
1724 #endif
1725     bsrr->referenceId = req->referenceId;
1726     bsrr->output_setname = req->sortedResultSetName;
1727     bsrr->sort_sequence = req->sortSequence;
1728     bsrr->stream = assoc->encode;
1729     bsrr->print = assoc->print;
1730
1731     bsrr->sort_status = Z_SortStatus_failure;
1732     bsrr->errcode = 0;
1733     bsrr->errstring = 0;
1734
1735     (*assoc->init->bend_sort)(assoc->backend, bsrr);
1736
1737     res->referenceId = bsrr->referenceId;
1738     res->sortStatus = (int *)
1739         odr_malloc (assoc->encode, sizeof(*res->sortStatus));
1740     *res->sortStatus = bsrr->sort_status;
1741     res->resultSetStatus = 0;
1742     if (bsrr->errcode)
1743     {
1744         Z_DiagRecs *dr = diagrecs (assoc, bsrr->errcode, bsrr->errstring);
1745 #ifdef ASN_COMPILED
1746         res->diagnostics = dr->diagRecs;
1747         res->num_diagnostics = dr->num_diagRecs;
1748 #else
1749         res->diagnostics = dr;
1750 #endif
1751     }
1752     else
1753     {
1754 #ifdef ASN_COMPILED
1755         res->num_diagnostics = 0;
1756 #endif
1757         res->diagnostics = 0;
1758     }
1759     res->otherInfo = 0;
1760
1761     apdu->which = Z_APDU_sortResponse;
1762     apdu->u.sortResponse = res;
1763     return apdu;
1764 }
1765
1766 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
1767     int *fd)
1768 {
1769     Z_DeleteResultSetRequest *req = reqb->request->u.deleteResultSetRequest;
1770     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
1771         odr_malloc (assoc->encode, sizeof(*res));
1772     bend_delete_rr *bdrr = (bend_delete_rr *)
1773         odr_malloc (assoc->encode, sizeof(*bdrr));
1774     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1775
1776     yaz_log(LOG_LOG, "Got DeleteRequest.");
1777
1778     bdrr->num_setnames = req->num_resultSetList;
1779     bdrr->setnames = req->resultSetList;
1780     bdrr->stream = assoc->encode;
1781     bdrr->print = assoc->print;
1782     bdrr->function = *req->deleteFunction;
1783     bdrr->referenceId = req->referenceId;
1784     bdrr->statuses = 0;
1785     if (bdrr->num_setnames > 0)
1786     {
1787         int i;
1788         bdrr->statuses = odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
1789                                     bdrr->num_setnames);
1790         for (i = 0; i < bdrr->num_setnames; i++)
1791             bdrr->statuses[i] = 0;
1792     }
1793     (*assoc->init->bend_delete)(assoc->backend, bdrr);
1794
1795     res->referenceId = req->referenceId;
1796
1797     res->deleteOperationStatus = (int *)
1798         odr_malloc (assoc->encode, sizeof(*res->deleteOperationStatus));
1799     *res->deleteOperationStatus = bdrr->delete_status;
1800
1801     res->deleteListStatuses = 0;
1802     if (bdrr->num_setnames > 0)
1803     {
1804         int i;
1805         res->deleteListStatuses = odr_malloc(assoc->encode,
1806                                              sizeof(*res->deleteListStatuses));
1807         res->deleteListStatuses->num = bdrr->num_setnames;
1808         res->deleteListStatuses->elements =
1809             odr_malloc (assoc->encode,
1810                         sizeof(*res->deleteListStatuses->elements) *
1811                         bdrr->num_setnames);
1812         for (i = 0; i<bdrr->num_setnames; i++)
1813         {
1814             res->deleteListStatuses->elements[i] =
1815                 odr_malloc (assoc->encode,
1816                             sizeof(**res->deleteListStatuses->elements));
1817             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
1818             res->deleteListStatuses->elements[i]->id =
1819                 odr_strdup (assoc->encode, bdrr->setnames[i]);
1820
1821         }
1822     }
1823     res->numberNotDeleted = 0;
1824     res->bulkStatuses = 0;
1825     res->deleteMessage = 0;
1826     res->otherInfo = 0;
1827
1828     apdu->which = Z_APDU_deleteResultSetResponse;
1829     apdu->u.deleteResultSetResponse = res;
1830     return apdu;
1831 }
1832
1833 static void process_close(association *assoc, request *reqb)
1834 {
1835     Z_Close *req = reqb->request->u.close;
1836     static char *reasons[] =
1837     {
1838         "finished",
1839         "shutdown",
1840         "systemProblem",
1841         "costLimit",
1842         "resources",
1843         "securityViolation",
1844         "protocolError",
1845         "lackOfActivity",
1846         "peerAbort",
1847         "unspecified"
1848     };
1849
1850     yaz_log(LOG_LOG, "Got Close, reason %s, message %s",
1851         reasons[*req->closeReason], req->diagnosticInformation ?
1852         req->diagnosticInformation : "NULL");
1853     if (assoc->version < 3) /* to make do_force respond with close */
1854         assoc->version = 3;
1855     do_close_req(assoc, Z_Close_finished,
1856                  "Association terminated by client", reqb);
1857 }
1858
1859 void save_referenceId (request *reqb, Z_ReferenceId *refid)
1860 {
1861     if (refid)
1862     {
1863         reqb->len_refid = refid->len;
1864         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
1865         memcpy (reqb->refid, refid->buf, refid->len);
1866     }
1867     else
1868     {
1869         reqb->len_refid = 0;
1870         reqb->refid = NULL;
1871     }
1872 }
1873
1874 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
1875 {
1876     process_response (a, req, res);
1877 }
1878
1879 bend_request bend_request_mk (bend_association a)
1880 {
1881     request *nreq = request_get (&a->outgoing);
1882     nreq->request_mem = nmem_create ();
1883     return nreq;
1884 }
1885
1886 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
1887 {
1888     Z_ReferenceId *id;
1889     if (!req->refid)
1890         return 0;
1891     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
1892     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
1893     id->len = id->size = req->len_refid;
1894     memcpy (id->buf, req->refid, req->len_refid);
1895     return id;
1896 }
1897
1898 void bend_request_destroy (bend_request *req)
1899 {
1900     nmem_destroy((*req)->request_mem);
1901     request_release(*req);
1902     *req = NULL;
1903 }
1904
1905 int bend_backend_respond (bend_association a, bend_request req)
1906 {
1907     char *msg;
1908     int r;
1909     r = process_request (a, req, &msg);
1910     if (r < 0)
1911         logf (LOG_WARN, "%s", msg);
1912     return r;
1913 }
1914
1915 void bend_request_setdata(bend_request r, void *p)
1916 {
1917     r->clientData = p;
1918 }
1919
1920 void *bend_request_getdata(bend_request r)
1921 {
1922     return r->clientData;
1923 }
1924
1925 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
1926 {
1927     bend_segment_rr request;
1928
1929     request.segment = reqb->request->u.segmentRequest;
1930     request.stream = assoc->encode;
1931     request.decode = assoc->decode;
1932     request.print = assoc->print;
1933     request.association = assoc;
1934
1935     (*assoc->init->bend_segment)(assoc->backend, &request);
1936
1937     return 0;
1938 }
1939
1940 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
1941 {
1942     bend_esrequest_rr esrequest;
1943
1944     Z_ExtendedServicesRequest *req = reqb->request->u.extendedServicesRequest;
1945     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
1946
1947     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
1948
1949     yaz_log(LOG_DEBUG,"inside Process esRequest");
1950
1951     esrequest.esr = reqb->request->u.extendedServicesRequest;
1952     esrequest.stream = assoc->encode;
1953     esrequest.decode = assoc->decode;
1954     esrequest.print = assoc->print;
1955     esrequest.errcode = 0;
1956     esrequest.errstring = NULL;
1957     esrequest.request = reqb;
1958     esrequest.association = assoc;
1959     esrequest.referenceId = req->referenceId;
1960
1961     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
1962
1963     /* If the response is being delayed, return NULL */
1964     if (esrequest.request == NULL)
1965         return(NULL);
1966
1967     resp->referenceId = req->referenceId;
1968
1969     if (esrequest.errcode == -1)
1970     {
1971         /* Backend service indicates request will be processed */
1972         yaz_log(LOG_DEBUG,"Request could be processed...Accepted !");
1973         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
1974     }
1975     else if (esrequest.errcode == 0)
1976     {
1977         /* Backend service indicates request will be processed */
1978         yaz_log(LOG_DEBUG,"Request could be processed...Done !");
1979         *resp->operationStatus = Z_ExtendedServicesResponse_done;
1980     }
1981     else
1982     {
1983         Z_DiagRecs *diagRecs = diagrecs (assoc, esrequest.errcode,
1984                                          esrequest.errstring);
1985
1986         /* Backend indicates error, request will not be processed */
1987         yaz_log(LOG_DEBUG,"Request could not be processed...failure !");
1988         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
1989         resp->num_diagnostics = diagRecs->num_diagRecs;
1990         resp->diagnostics = diagRecs->diagRecs;
1991     }
1992     /* Do something with the members of bend_extendedservice */
1993
1994     yaz_log(LOG_DEBUG,"Send the result apdu");
1995     return apdu;
1996 }