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 1.108  2000-09-04 08:58:15  adam
   7  * Added prefix yaz_ for most logging utility functions.
   8  *
   9  * Revision 1.107  2000/08/31 10:20:12  adam
  10  * Added member request_format and output_format for backend fetch method.
  11  *
  12  * Revision 1.106  2000/08/31 09:51:25  adam
  13  * Added record_syntax member for fetch method (raw OID).
  14  *
  15  * Revision 1.105  2000/07/06 10:38:47  adam
  16  * Enhanced option --enable-tcpd.
  17  *
  18  * Revision 1.104  2000/04/05 07:39:55  adam
  19  * Added shared library support (libtool).
  20  *
  21  * Revision 1.103  2000/03/20 19:06:25  adam
  22  * Added Segment request for fronend server. Work on admin for client.
  23  *
  24  * Revision 1.102  2000/03/15 12:59:49  adam
  25  * Added handle member to statserv_control.
  26  *
  27  * Revision 1.101  2000/01/12 14:36:07  adam
  28  * Added printing stream (ODR) for backend functions.
  29  *
  30  * Revision 1.100  1999/12/16 23:36:19  adam
  31  * Implemented ILL protocol. Minor updates ASN.1 compiler.
  32  *
  33  * Revision 1.99  1999/11/30 13:47:12  adam
  34  * Improved installation. Moved header files to include/yaz.
  35  *
  36  * Revision 1.98  1999/11/29 15:12:27  adam
  37  * Changed the way implementationName - and version is set.
  38  *
  39  * Revision 1.96  1999/11/04 14:58:44  adam
  40  * Added status elements for backend delete result set handler.
  41  * Updated delete result result set command for client.
  42  *
  43  * Revision 1.95  1999/10/11 10:01:24  adam
  44  * Implemented bend_sort_rr handler for frontend server.
  45  *
  46  * Revision 1.94  1999/08/27 09:40:32  adam
  47  * Renamed logf function to yaz_log. Removed VC++ project files.
  48  *
  49  * Revision 1.93  1999/07/06 12:17:15  adam
  50  * Added option -1 that runs server once (for profiling purposes).
  51  *
  52  * Revision 1.92  1999/06/17 10:54:45  adam
  53  * Added facility to specify implementation version - and name
  54  * for server.
  55  *
  56  * Revision 1.91  1999/06/01 14:29:12  adam
  57  * Work on Extended Services.
  58  *
  59  * Revision 1.90  1999/05/27 13:02:20  adam
  60  * Assigned OID for old DB Update (VAL_DBUPDATE0).
  61  *
  62  * Revision 1.89  1999/05/26 15:24:26  adam
  63  * Fixed minor bugs regarding DB Update (introduced by previous commit).
  64  *
  65  * Revision 1.88  1999/04/20 09:56:48  adam
  66  * Added 'name' paramter to encoder/decoder routines (typedef Odr_fun).
  67  * Modified all encoders/decoders to reflect this change.
  68  *
  69  * Revision 1.87  1999/03/31 11:18:25  adam
  70  * Implemented odr_strdup. Added Reference ID to backend server API.
  71  *
  72  * Revision 1.86  1999/02/02 13:57:38  adam
  73  * Uses preprocessor define WIN32 instead of WINDOWS to build code
  74  * for Microsoft WIN32.
  75  *
  76  * Revision 1.85  1998/11/17 09:52:59  adam
  77  * Fixed minor bug (introduced by previous commit).
  78  *
  79  * Revision 1.84  1998/11/16 16:02:32  adam
  80  * Added loggin utilies, log_rpn_query and log_scan_term. These used
  81  * to be part of Zebra.
  82  *
  83  * Revision 1.83  1998/11/03 10:09:36  adam
  84  * Fixed bug regarding YC.
  85  *
  86  * Revision 1.82  1998/10/20 14:00:30  quinn
  87  * Fixed Scan
  88  *
  89  * Revision 1.81  1998/10/13 16:12:24  adam
  90  * Added support for Surrogate Diagnostics for Scan Term entries.
  91  *
  92  * Revision 1.80  1998/09/02 12:41:53  adam
  93  * Added decode stream in bend search structures.
  94  *
  95  * Revision 1.79  1998/08/19 16:10:08  adam
  96  * Changed som member names of DeleteResultSetRequest/Response.
  97  *
  98  * Revision 1.78  1998/08/03 10:23:55  adam
  99  * Fixed bug regarding Options for Sort.
 100  *
 101  * Revision 1.77  1998/07/20 12:38:42  adam
 102  * Implemented delete result set service to server API.
 103  *
 104  * Revision 1.76  1998/05/27 16:57:07  adam
 105  * Support for surrogate diagnostic records added for bend_fetch.
 106  *
 107  * Revision 1.75  1998/05/18 10:13:07  adam
 108  * Fixed call to es_request handler - extra argument was passed.
 109  *
 110  * Revision 1.74  1998/03/31 15:13:20  adam
 111  * Development towards compiled ASN.1.
 112  *
 113  * Revision 1.73  1998/03/31 11:07:45  adam
 114  * Furhter work on UNIverse resource report.
 115  * Added Extended Services handling in frontend server.
 116  *
 117  * Revision 1.72  1998/02/11 11:53:35  adam
 118  * Changed code so that it compiles as C++.
 119  *
 120  * Revision 1.71  1998/02/10 11:03:57  adam
 121  * Added support for extended handlers in backend server interface.
 122  *
 123  * Revision 1.70  1998/01/29 13:15:35  adam
 124  * Implemented sort for the backend interface.
 125  *
 126  * Revision 1.69  1997/09/30 11:48:12  adam
 127  * Fixed bug introduced by previous commit.
 128  *
 129  * Revision 1.68  1997/09/29 13:18:59  adam
 130  * Added function, oid_ent_to_oid, to replace the function
 131  * oid_getoidbyent, which is not thread safe.
 132  *
 133  * Revision 1.67  1997/09/17 12:10:40  adam
 134  * YAZ version 1.4.
 135  *
 136  * Revision 1.66  1997/09/05 15:26:44  adam
 137  * Added ODR encode in search and scen bend request structures.
 138  * Fixed a few enums that caused trouble with C++.
 139  *
 140  * Revision 1.65  1997/09/01 08:53:01  adam
 141  * New windows NT/95 port using MSV5.0. The test server 'ztest' was
 142  * moved a separate directory. MSV5.0 project server.dsp created.
 143  * As an option, the server can now operate as an NT service.
 144  *
 145  * Revision 1.64  1997/04/30 08:52:11  quinn
 146  * Null
 147  *
 148  * Revision 1.63  1996/10/11  11:57:26  quinn
 149  * Smallish
 150  *
 151  * Revision 1.62  1996/07/06  19:58:35  quinn
 152  * System headerfiles gathered in yconfig
 153  *
 154  * Revision 1.61  1996/06/10  08:56:16  quinn
 155  * Work on Summary.
 156  *
 157  * Revision 1.60  1996/05/30  11:03:10  quinn
 158  * Fixed NextresultSetPosition bug fixed.
 159  *
 160  * Revision 1.59  1996/05/14  09:26:46  quinn
 161  * Added attribute set to scan backend
 162  *
 163  * Revision 1.58  1996/02/20  12:53:04  quinn
 164  * Chanes to SCAN
 165  *
 166  * Revision 1.57  1996/01/02  08:57:47  quinn
 167  * Changed enums in the ASN.1 .h files to #defines. Changed oident.class to oclass
 168  *
 169  * Revision 1.56  1995/12/14  11:09:57  quinn
 170  * Work on Explain
 171  *
 172  * Revision 1.55  1995/11/08  17:41:37  quinn
 173  * Smallish.
 174  *
 175  * Revision 1.54  1995/11/08  15:11:29  quinn
 176  * Log of close transmit.
 177  *
 178  * Revision 1.53  1995/11/01  13:54:58  quinn
 179  * Minor adjustments
 180  *
 181  * Revision 1.52  1995/11/01  12:19:13  quinn
 182  * Second attempt to fix same bug.
 183  *
 184  * Revision 1.50  1995/10/25  16:58:32  quinn
 185  * Simple.
 186  *
 187  * Revision 1.49  1995/10/16  13:51:53  quinn
 188  * Changes to provide Especs to the backend.
 189  *
 190  * Revision 1.48  1995/10/06  08:51:20  quinn
 191  * Added Write-buffer.
 192  *
 193  * Revision 1.47  1995/08/29  14:24:16  quinn
 194  * Added second half of close-handshake
 195  *
 196  * Revision 1.46  1995/08/29  11:17:58  quinn
 197  * Added code to receive close
 198  *
 199  * Revision 1.45  1995/08/21  09:11:00  quinn
 200  * Smallish fixes to suppport new formats.
 201  *
 202  * Revision 1.44  1995/08/17  12:45:25  quinn
 203  * Fixed minor problems with GRS-1. Added support in c&s.
 204  *
 205  * Revision 1.43  1995/08/15  12:00:31  quinn
 206  * Updated External
 207  *
 208  * Revision 1.42  1995/08/15  11:16:50  quinn
 209  *
 210  * Revision 1.41  1995/08/02  10:23:06  quinn
 211  * Smallish
 212  *
 213  * Revision 1.40  1995/07/31  14:34:26  quinn
 214  * Fixed bug in process_searchResponse (numberOfRecordsReturned).
 215  *
 216  * Revision 1.39  1995/06/27  13:21:00  quinn
 217  * SUTRS support
 218  *
 219  * Revision 1.38  1995/06/19  12:39:11  quinn
 220  * Fixed bug in timeout code. Added BER dumper.
 221  *
 222  * Revision 1.37  1995/06/16  13:16:14  quinn
 223  * Fixed Defaultdiagformat.
 224  *
 225  * Revision 1.36  1995/06/16  10:31:36  quinn
 226  * Added session timeout.
 227  *
 228  * Revision 1.35  1995/06/15  07:45:14  quinn
 229  * Moving to v3.
 230  *
 231  * Revision 1.34  1995/06/14  15:26:46  quinn
 232  * *** empty log message ***
 233  *
 234  * Revision 1.33  1995/06/06  14:57:05  quinn
 235  * Better diagnostics.
 236  *
 237  * Revision 1.32  1995/06/06  08:41:44  quinn
 238  * Better diagnostics.
 239  *
 240  * Revision 1.31  1995/06/06  08:15:37  quinn
 241  * Cosmetic.
 242  *
 243  * Revision 1.30  1995/06/05  10:53:32  quinn
 244  * Added a better SCAN.
 245  *
 246  * Revision 1.29  1995/06/01  11:25:03  quinn
 247  * Smallish.
 248  *
 249  * Revision 1.28  1995/06/01  11:21:01  quinn
 250  * Attempting to fix a bug in pack-records. replaced break with continue
 251  * for large records, according to standard.
 252  *
 253  * Revision 1.27  1995/05/29  08:12:06  quinn
 254  * Moved oid to util
 255  *
 256  * Revision 1.26  1995/05/18  13:02:12  quinn
 257  * Smallish.
 258  *
 259  * Revision 1.25  1995/05/17  08:42:26  quinn
 260  * Transfer auth info to backend. Allow backend to reject init gracefully.
 261  *
 262  * Revision 1.24  1995/05/16  08:51:04  quinn
 263  * License, documentation, and memory fixes
 264  *
 265  * Revision 1.23  1995/05/15  13:25:10  quinn
 266  * Fixed memory bug.
 267  *
 268  * Revision 1.22  1995/05/15  11:56:39  quinn
 269  * Asynchronous facilities. Restructuring of seshigh code.
 270  *
 271  * Revision 1.21  1995/05/02  08:53:19  quinn
 272  * Trying in vain to fix comm with ISODE
 273  *
 274  * Revision 1.20  1995/04/20  15:13:00  quinn
 275  * Cosmetic
 276  *
 277  * Revision 1.19  1995/04/18  08:15:34  quinn
 278  * Added dynamic memory allocation on encoding (whew). Code is now somewhat
 279  * neater. We'll make the same change for decoding one day.
 280  *
 281  * Revision 1.18  1995/04/17  11:28:25  quinn
 282  * Smallish
 283  *
 284  * Revision 1.17  1995/04/10  10:23:36  quinn
 285  * Some work to add scan and other things.
 286  *
 287  * Revision 1.16  1995/03/31  09:18:55  quinn
 288  * Added logging.
 289  *
 290  * Revision 1.15  1995/03/30  14:03:23  quinn
 291  * Added RFC1006 as separate library
 292  *
 293  * Revision 1.14  1995/03/30  12:18:17  quinn
 294  * Fixed bug.
 295  *
 296  * Revision 1.13  1995/03/30  09:09:24  quinn
 297  * Added state-handle and some support for asynchronous activities.
 298  *
 299  * Revision 1.12  1995/03/29  15:40:16  quinn
 300  * Ongoing work. Statserv is now dynamic by default
 301  *
 302  * Revision 1.11  1995/03/28  09:16:21  quinn
 303  * Added record packing to the search request
 304  *
 305  * Revision 1.10  1995/03/27  08:34:24  quinn
 306  * Added dynamic server functionality.
 307  * Released bindings to session.c (is now redundant)
 308  *
 309  * Revision 1.9  1995/03/22  15:01:26  quinn
 310  * Adjusting record packing.
 311  *
 312  * Revision 1.8  1995/03/22  10:13:21  quinn
 313  * Working on record packer
 314  *
 315  * Revision 1.7  1995/03/21  15:53:31  quinn
 316  * Little changes.
 317  *
 318  * Revision 1.6  1995/03/21  12:30:09  quinn
 319  * Beginning to add support for record packing.
 320  *
 321  * Revision 1.5  1995/03/17  10:44:13  quinn
 322  * Added catch of null-string in makediagrec
 323  *
 324  * Revision 1.4  1995/03/17  10:18:08  quinn
 325  * Added memory management.
 326  *
 327  * Revision 1.3  1995/03/16  17:42:39  quinn
 328  * Little changes
 329  *
 330  * Revision 1.2  1995/03/16  13:29:01  quinn
 331  * Partitioned server.
 332  *
 333  * Revision 1.1  1995/03/15  16:02:10  quinn
 334  * Modded session.c to seshigh.c
 335  *
 336  */
 337
 338 /*
 339  * Frontend server logic.
 340  *
 341  * This code receives incoming APDUs, and handles client requests by means
 342  * of the backend API.
 343  *
 344  * Some of the code is getting quite involved, compared to simpler servers -
 345  * primarily because it is asynchronous both in the communication with
 346  * the user and the backend. We think the complexity will pay off in
 347  * the form of greater flexibility when more asynchronous facilities
 348  * are implemented.
 349  *
 350  * Memory management has become somewhat involved. In the simple case, where
 351  * only one PDU is pending at a time, it will simply reuse the same memory,
 352  * once it has found its working size. When we enable multiple concurrent
 353  * operations, perhaps even with multiple parallel calls to the backend, it
 354  * will maintain a pool of buffers for encoding and decoding, trying to
 355  * minimize memory allocation/deallocation during normal operation.
 356  *
 357  * TODOs include (and will be done in order of public interest):
 358  *
 359  * Support for EXPLAIN - provide simple meta-database system.
 360  * Support for access control.
 361  * Support for resource control.
 362  * Support for extended services - primarily Item Order.
 363  * Rest of Z39.50-1994
 364  *
 365  */
 366
 367 #include <stdlib.h>
 368 #include <stdio.h>
 369 #ifdef WIN32
 370 #include <process.h>
 371 #else
 372 #include <unistd.h>
 373 #endif
 374 #include <assert.h>
 375
 376 #include <yaz/yconfig.h>
 377 #include <yaz/xmalloc.h>
 378 #include <yaz/comstack.h>
 379 #include "eventl.h"
 380 #include "session.h"
 381 #include <yaz/proto.h>
 382 #include <yaz/oid.h>
 383 #include <yaz/log.h>
 384 #include <yaz/logrpn.h>
 385 #include <yaz/statserv.h>
 386
 387 #include <yaz/backend.h>
 388
 389 static int process_request(association *assoc, request *req, char **msg);
 390 void backend_response(IOCHAN i, int event);
 391 static int process_response(association *assoc, request *req, Z_APDU *res);
 392 static Z_APDU *process_initRequest(association *assoc, request *reqb);
 393 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
 394     int *fd);
 395 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
 396     bend_search_rr *bsrr, int *fd);
 397 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
 398     int *fd);
 399 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
 400 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
 401 static void process_close(association *assoc, request *reqb);
 402 void save_referenceId (request *reqb, Z_ReferenceId *refid);
 403 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
 404     int *fd);
 405 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 406
 407 static FILE *apduf = 0; /* for use in static mode */
 408 static statserv_options_block *control_block = 0;
 409
 410 /* Chas: Added in from DALI */
 411 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 412 /* Chas: End of addition from DALI */
 413
 414 /*
 415  * Create and initialize a new association-handle.
 416  *  channel  : iochannel for the current line.
 417  *  link     : communications channel.
 418  * Returns: 0 or a new association handle.
 419  */
 420 association *create_association(IOCHAN channel, COMSTACK link)
 421 {
 422     association *anew;
 423
 424     if (!control_block)
 425         control_block = statserv_getcontrol();
 426     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 427         return 0;
 428     anew->init = 0;
 429     anew->client_chan = channel;
 430     anew->client_link = link;
 431     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 432         !(anew->encode = odr_createmem(ODR_ENCODE)))
 433         return 0;
 434     if (*control_block->apdufile)
 435     {
 436         char filename[256];
 437         FILE *f;
 438
 439         strcpy(filename, control_block->apdufile);
 440         if (!(anew->print = odr_createmem(ODR_PRINT)))
 441             return 0;
 442         if (*control_block->apdufile != '-')
 443         {
 444             strcpy(filename, control_block->apdufile);
 445             if (!control_block->dynamic)
 446             {
 447                 if (!apduf)
 448                 {
 449                     if (!(apduf = fopen(filename, "w")))
 450                     {
 451                         yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename);
 452                         return 0;
 453                     }
 454                     setvbuf(apduf, 0, _IONBF, 0);
 455                 }
 456                 f = apduf;
 457             }
 458             else
 459             {
 460                 sprintf(filename + strlen(filename), ".%d", getpid());
 461                 if (!(f = fopen(filename, "w")))
 462                 {
 463                     yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename);
 464                     return 0;
 465                 }
 466                 setvbuf(f, 0, _IONBF, 0);
 467             }
 468             odr_setprint(anew->print, f);
 469         }
 470     }
 471     else
 472         anew->print = 0;
 473     anew->input_buffer = 0;
 474     anew->input_buffer_len = 0;
 475     anew->backend = 0;
 476     anew->state = ASSOC_NEW;
 477     request_initq(&anew->incoming);
 478     request_initq(&anew->outgoing);
 479     anew->proto = cs_getproto(link);
 480     return anew;
 481 }
 482
 483 /*
 484  * Free association and release resources.
 485  */
 486 void destroy_association(association *h)
 487 {
 488     statserv_options_block *cb = statserv_getcontrol();
 489
 490     xfree(h->init);
 491     odr_destroy(h->decode);
 492     odr_destroy(h->encode);
 493     if (h->print)
 494         odr_destroy(h->print);
 495     if (h->input_buffer)
 496     xfree(h->input_buffer);
 497     if (h->backend)
 498         (*cb->bend_close)(h->backend);
 499     while (request_deq(&h->incoming));
 500     while (request_deq(&h->outgoing));
 501     request_delq(&h->incoming);
 502     request_delq(&h->outgoing);
 503     xfree(h);
 504     if (control_block && control_block->one_shot)
 505         exit (0);
 506 }
 507
 508 static void do_close_req(association *a, int reason, char *message,
 509                          request *req)
 510 {
 511     Z_APDU apdu;
 512     Z_Close *cls = zget_Close(a->encode);
 513
 514     /* Purge request queue */
 515     while (request_deq(&a->incoming));
 516     while (request_deq(&a->outgoing));
 517     if (a->version >= 3)
 518     {
 519         yaz_log(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
 520             reason, message ? message : "none");
 521         apdu.which = Z_APDU_close;
 522         apdu.u.close = cls;
 523         *cls->closeReason = reason;
 524         cls->diagnosticInformation = message;
 525         process_response(a, req, &apdu);
 526         iochan_settimeout(a->client_chan, 60);
 527     }
 528     else
 529     {
 530         yaz_log(LOG_DEBUG, "v2 client. No Close PDU");
 531         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 532     }
 533     a->state = ASSOC_DEAD;
 534 }
 535
 536 static void do_close(association *a, int reason, char *message)
 537 {
 538     do_close_req (a, reason, message, request_get(&a->outgoing));
 539 }
 540
 541 /*
 542  * This is where PDUs from the client are read and the further
 543  * processing is initiated. Flow of control moves down through the
 544  * various process_* functions below, until the encoded result comes back up
 545  * to the output handler in here.
 546  *
 547  *  h     : the I/O channel that has an outstanding event.
 548  *  event : the current outstanding event.
 549  */
 550 void ir_session(IOCHAN h, int event)
 551 {
 552     int res;
 553     association *assoc = (association *)iochan_getdata(h);
 554     COMSTACK conn = assoc->client_link;
 555     request *req;
 556
 557     assert(h && conn && assoc);
 558     if (event == EVENT_TIMEOUT)
 559     {
 560         if (assoc->state != ASSOC_UP)
 561         {
 562             yaz_log(LOG_LOG, "Final timeout - closing connection.");
 563             cs_close(conn);
 564             destroy_association(assoc);
 565             iochan_destroy(h);
 566         }
 567         else
 568         {
 569             yaz_log(LOG_LOG, "Session idle too long. Sending close.");
 570             do_close(assoc, Z_Close_lackOfActivity, 0);
 571         }
 572         return;
 573     }
 574     if (event & EVENT_INPUT || event & EVENT_WORK) /* input */
 575     {
 576         if (event & EVENT_INPUT)
 577         {
 578             yaz_log(LOG_DEBUG, "ir_session (input)");
 579             assert(assoc && conn);
 580             /* We aren't speaking to this fellow */
 581             if (assoc->state == ASSOC_DEAD)
 582             {
 583                 yaz_log(LOG_LOG, "Closed connection after reject");
 584                 cs_close(conn);
 585                 destroy_association(assoc);
 586                 iochan_destroy(h);
 587                 return;
 588             }
 589             if ((res = cs_get(conn, &assoc->input_buffer,
 590                 &assoc->input_buffer_len)) <= 0)
 591             {
 592                 yaz_log(LOG_LOG, "Connection closed by client");
 593                 cs_close(conn);
 594                 destroy_association(assoc);
 595                 iochan_destroy(h);
 596                 return;
 597             }
 598             else if (res == 1) /* incomplete read - wait for more  */
 599                 return;
 600             if (cs_more(conn)) /* more stuff - call us again later, please */
 601                 iochan_setevent(h, EVENT_INPUT);
 602
 603             /* we got a complete PDU. Let's decode it */
 604             yaz_log(LOG_DEBUG, "Got PDU, %d bytes", res);
 605             req = request_get(&assoc->incoming); /* get a new request structure */
 606             odr_reset(assoc->decode);
 607             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 608             if (!z_APDU(assoc->decode, &req->request, 0, 0))
 609             {
 610                 yaz_log(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ",
 611                     odr_errmsg(odr_geterror(assoc->decode)),
 612                     odr_offset(assoc->decode));
 613                 yaz_log(LOG_LOG, "PDU dump:");
 614                 odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 615                 do_close(assoc, Z_Close_protocolError, "Malformed package");
 616                 return;
 617             }
 618             req->request_mem = odr_extract_mem(assoc->decode);
 619             if (assoc->print && !z_APDU(assoc->print, &req->request, 0, 0))
 620             {
 621                 yaz_log(LOG_WARN, "ODR print error: %s",
 622                     odr_errmsg(odr_geterror(assoc->print)));
 623                 odr_reset(assoc->print);
 624             }
 625             request_enq(&assoc->incoming, req);
 626         }
 627
 628         /* can we do something yet? */
 629         req = request_head(&assoc->incoming);
 630         if (req->state == REQUEST_IDLE)
 631         {
 632             char *msg;
 633             request_deq(&assoc->incoming);
 634             if (process_request(assoc, req, &msg) < 0)
 635                 do_close_req(assoc, Z_Close_systemProblem, msg, req);
 636         }
 637     }
 638     if (event & EVENT_OUTPUT)
 639     {
 640         request *req = request_head(&assoc->outgoing);
 641
 642         yaz_log(LOG_DEBUG, "ir_session (output)");
 643         req->state = REQUEST_PENDING;
 644         switch (res = cs_put(conn, req->response, req->len_response))
 645         {
 646             case -1:
 647                 yaz_log(LOG_LOG, "Connection closed by client");
 648                 cs_close(conn);
 649                 destroy_association(assoc);
 650                 iochan_destroy(h);
 651                 break;
 652             case 0: /* all sent - release the request structure */
 653                 yaz_log(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 654                 nmem_destroy(req->request_mem);
 655                 request_deq(&assoc->outgoing);
 656                 request_release(req);
 657                 if (!request_head(&assoc->outgoing))
 658                     iochan_clearflag(h, EVENT_OUTPUT);
 659                 break;
 660             /* value of 1 -- partial send -- is simply ignored */
 661         }
 662     }
 663     if (event & EVENT_EXCEPT)
 664     {
 665         yaz_log(LOG_DEBUG, "ir_session (exception)");
 666         cs_close(conn);
 667         destroy_association(assoc);
 668         iochan_destroy(h);
 669     }
 670 }
 671
 672 /*
 673  * Initiate request processing.
 674  */
 675 static int process_request(association *assoc, request *req, char **msg)
 676 {
 677     int fd = -1;
 678     Z_APDU *res;
 679     int retval;
 680
 681     *msg = "Unknown Error";
 682     assert(req && req->state == REQUEST_IDLE);
 683     if (req->request->which != Z_APDU_initRequest && !assoc->init)
 684     {
 685         *msg = "Missing InitRequest";
 686         return -1;
 687     }
 688     switch (req->request->which)
 689     {
 690     case Z_APDU_initRequest:
 691         res = process_initRequest(assoc, req); break;
 692     case Z_APDU_searchRequest:
 693         res = process_searchRequest(assoc, req, &fd); break;
 694     case Z_APDU_presentRequest:
 695         res = process_presentRequest(assoc, req, &fd); break;
 696     case Z_APDU_scanRequest:
 697         if (assoc->init->bend_scan)
 698             res = process_scanRequest(assoc, req, &fd);
 699         else
 700         {
 701             *msg = "Cannot handle Scan APDU";
 702             return -1;
 703         }
 704         break;
 705     case Z_APDU_extendedServicesRequest:
 706         if (assoc->init->bend_esrequest)
 707             res = process_ESRequest(assoc, req, &fd);
 708         else
 709         {
 710             *msg = "Cannot handle Extended Services APDU";
 711             return -1;
 712         }
 713         break;
 714     case Z_APDU_sortRequest:
 715         if (assoc->init->bend_sort)
 716             res = process_sortRequest(assoc, req, &fd);
 717         else
 718         {
 719             *msg = "Cannot handle Sort APDU";
 720             return -1;
 721         }
 722         break;
 723     case Z_APDU_close:
 724         process_close(assoc, req);
 725         return 0;
 726     case Z_APDU_deleteResultSetRequest:
 727         if (assoc->init->bend_delete)
 728             res = process_deleteRequest(assoc, req, &fd);
 729         else
 730         {
 731             *msg = "Cannot handle Delete APDU";
 732             return -1;
 733         }
 734         break;
 735     case Z_APDU_segmentRequest:
 736         if (assoc->init->bend_segment)
 737         {
 738             res = process_segmentRequest (assoc, req);
 739         }
 740         else
 741         {
 742             *msg = "Cannot handle Segment APDU";
 743             return -1;
 744         }
 745         break;
 746     default:
 747         *msg = "Bad APDU received";
 748         return -1;
 749     }
 750     if (res)
 751     {
 752         yaz_log(LOG_DEBUG, "  result immediately available");
 753         retval = process_response(assoc, req, res);
 754     }
 755     else if (fd < 0)
 756     {
 757         yaz_log(LOG_DEBUG, "  result unavailble");
 758         retval = 0;
 759     }
 760     else /* no result yet - one will be provided later */
 761     {
 762         IOCHAN chan;
 763
 764         /* Set up an I/O handler for the fd supplied by the backend */
 765
 766         yaz_log(LOG_DEBUG, "   establishing handler for result");
 767         req->state = REQUEST_PENDING;
 768         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
 769             abort();
 770         iochan_setdata(chan, assoc);
 771         retval = 0;
 772     }
 773     return retval;
 774 }
 775
 776 /*
 777  * Handle message from the backend.
 778  */
 779 void backend_response(IOCHAN i, int event)
 780 {
 781     association *assoc = (association *)iochan_getdata(i);
 782     request *req = request_head(&assoc->incoming);
 783     Z_APDU *res;
 784     int fd;
 785
 786     yaz_log(LOG_DEBUG, "backend_response");
 787     assert(assoc && req && req->state != REQUEST_IDLE);
 788     /* determine what it is we're waiting for */
 789     switch (req->request->which)
 790     {
 791         case Z_APDU_searchRequest:
 792             res = response_searchRequest(assoc, req, 0, &fd); break;
 793 #if 0
 794         case Z_APDU_presentRequest:
 795             res = response_presentRequest(assoc, req, 0, &fd); break;
 796         case Z_APDU_scanRequest:
 797             res = response_scanRequest(assoc, req, 0, &fd); break;
 798 #endif
 799         default:
 800             yaz_log(LOG_WARN, "Serious programmer's lapse or bug");
 801             abort();
 802     }
 803     if ((res && process_response(assoc, req, res) < 0) || fd < 0)
 804     {
 805         yaz_log(LOG_LOG, "Fatal error when talking to backend");
 806         do_close(assoc, Z_Close_systemProblem, 0);
 807         iochan_destroy(i);
 808         return;
 809     }
 810     else if (!res) /* no result yet - try again later */
 811     {
 812         yaz_log(LOG_DEBUG, "   no result yet");
 813         iochan_setfd(i, fd); /* in case fd has changed */
 814     }
 815 }
 816
 817 /*
 818  * Encode response, and transfer the request structure to the outgoing queue.
 819  */
 820 static int process_response(association *assoc, request *req, Z_APDU *res)
 821 {
 822     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
 823     if (!z_APDU(assoc->encode, &res, 0, 0))
 824     {
 825         yaz_log(LOG_WARN, "ODR error when encoding response: %s",
 826             odr_errmsg(odr_geterror(assoc->decode)));
 827         odr_reset(assoc->encode);
 828         return -1;
 829     }
 830     req->response = odr_getbuf(assoc->encode, &req->len_response,
 831         &req->size_response);
 832     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
 833     if (assoc->print && !z_APDU(assoc->print, &res, 0, 0))
 834     {
 835         yaz_log(LOG_WARN, "ODR print error: %s",
 836             odr_errmsg(odr_geterror(assoc->print)));
 837         odr_reset(assoc->print);
 838     }
 839     odr_reset(assoc->encode);
 840     req->state = REQUEST_IDLE;
 841     request_enq(&assoc->outgoing, req);
 842     /* turn the work over to the ir_session handler */
 843     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
 844     /* Is there more work to be done? give that to the input handler too */
 845 #if 1
 846     if (request_head(&assoc->incoming))
 847     {
 848         yaz_log (LOG_DEBUG, "more work to be done");
 849         iochan_setevent(assoc->client_chan, EVENT_WORK);
 850     }
 851 #endif
 852     return 0;
 853 }
 854
 855 /*
 856  * Handle init request.
 857  * At the moment, we don't check the options
 858  * anywhere else in the code - we just try not to do anything that would
 859  * break a naive client. We'll toss 'em into the association block when
 860  * we need them there.
 861  */
 862 static Z_APDU *process_initRequest(association *assoc, request *reqb)
 863 {
 864     statserv_options_block *cb = statserv_getcontrol();
 865     Z_InitRequest *req = reqb->request->u.initRequest;
 866     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
 867     Z_InitResponse *resp = apdu->u.initResponse;
 868     bend_initresult *binitres;
 869     char options[100];
 870
 871     xfree (assoc->init);
 872     assoc->init = xmalloc (sizeof(*assoc->init));
 873
 874     yaz_log(LOG_LOG, "Got initRequest");
 875     if (req->implementationId)
 876         yaz_log(LOG_LOG, "Id:        %s", req->implementationId);
 877     if (req->implementationName)
 878         yaz_log(LOG_LOG, "Name:      %s", req->implementationName);
 879     if (req->implementationVersion)
 880         yaz_log(LOG_LOG, "Version:   %s", req->implementationVersion);
 881
 882     assoc->init->stream = assoc->encode;
 883     assoc->init->print = assoc->print;
 884     assoc->init->auth = req->idAuthentication;
 885     assoc->init->referenceId = req->referenceId;
 886     assoc->init->implementation_version = 0;
 887     assoc->init->implementation_name = 0;
 888     assoc->init->bend_sort = NULL;
 889     assoc->init->bend_search = NULL;
 890     assoc->init->bend_present = NULL;
 891     assoc->init->bend_esrequest = NULL;
 892     assoc->init->bend_delete = NULL;
 893     assoc->init->bend_scan = NULL;
 894     assoc->init->bend_segment = NULL;
 895     assoc->init->bend_fetch = NULL;
 896     if (!(binitres = (*cb->bend_init)(assoc->init)))
 897     {
 898         yaz_log(LOG_WARN, "Bad response from backend.");
 899         return 0;
 900     }
 901
 902     assoc->backend = binitres->handle;
 903     if ((assoc->init->bend_sort))
 904         yaz_log (LOG_DEBUG, "Sort handler installed");
 905     if ((assoc->init->bend_search))
 906         yaz_log (LOG_DEBUG, "Search handler installed");
 907     if ((assoc->init->bend_present))
 908         yaz_log (LOG_DEBUG, "Present handler installed");
 909     if ((assoc->init->bend_esrequest))
 910         yaz_log (LOG_DEBUG, "ESRequest handler installed");
 911     if ((assoc->init->bend_delete))
 912         yaz_log (LOG_DEBUG, "Delete handler installed");
 913     if ((assoc->init->bend_scan))
 914         yaz_log (LOG_DEBUG, "Scan handler installed");
 915     if ((assoc->init->bend_segment))
 916         yaz_log (LOG_DEBUG, "Segment handler installed");
 917
 918     resp->referenceId = req->referenceId;
 919     *options = '\0';
 920     /* let's tell the client what we can do */
 921     if (ODR_MASK_GET(req->options, Z_Options_search))
 922     {
 923         ODR_MASK_SET(resp->options, Z_Options_search);
 924         strcat(options, "srch");
 925     }
 926     if (ODR_MASK_GET(req->options, Z_Options_present))
 927     {
 928         ODR_MASK_SET(resp->options, Z_Options_present);
 929         strcat(options, " prst");
 930     }
 931     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
 932         assoc->init->bend_delete)
 933     {
 934         ODR_MASK_SET(resp->options, Z_Options_delSet);
 935         strcat(options, " del");
 936     }
 937     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
 938         assoc->init->bend_esrequest)
 939     {
 940         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
 941         strcat (options, " extendedServices");
 942     }
 943     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
 944     {
 945         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
 946         strcat(options, " namedresults");
 947     }
 948     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
 949     {
 950         ODR_MASK_SET(resp->options, Z_Options_scan);
 951         strcat(options, " scan");
 952     }
 953     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
 954     {
 955         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
 956         strcat(options, " concurop");
 957     }
 958     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
 959     {
 960         ODR_MASK_SET(resp->options, Z_Options_sort);
 961         strcat(options, " sort");
 962     }
 963     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
 964     {
 965         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
 966         assoc->version = 2; /* 1 & 2 are equivalent */
 967     }
 968     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
 969     {
 970         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
 971         assoc->version = 2;
 972     }
 973     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
 974     {
 975         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
 976         assoc->version = 3;
 977     }
 978     yaz_log(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
 979     assoc->maximumRecordSize = *req->maximumRecordSize;
 980     if (assoc->maximumRecordSize > control_block->maxrecordsize)
 981         assoc->maximumRecordSize = control_block->maxrecordsize;
 982     assoc->preferredMessageSize = *req->preferredMessageSize;
 983     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
 984         assoc->preferredMessageSize = assoc->maximumRecordSize;
 985     resp->preferredMessageSize = &assoc->preferredMessageSize;
 986     resp->maximumRecordSize = &assoc->maximumRecordSize;
 987
 988     resp->implementationName = "GFS";
 989
 990     if (assoc->init->implementation_name)
 991     {
 992         char *nv = (char *)
 993             odr_malloc (assoc->encode,
 994                         strlen(assoc->init->implementation_name) + 10 +
 995                                strlen(resp->implementationName));
 996         sprintf (nv, "%s / %s",
 997                  resp->implementationName, assoc->init->implementation_name);
 998         resp->implementationName = nv;
 999     }
1000     if (assoc->init->implementation_version)
1001     {
1002         char *nv = (char *)
1003             odr_malloc (assoc->encode,
1004                         strlen(assoc->init->implementation_version) + 10 +
1005                                strlen(resp->implementationVersion));
1006         sprintf (nv, "YAZ %s / %s",
1007                  resp->implementationVersion,
1008                  assoc->init->implementation_version);
1009         resp->implementationVersion = nv;
1010     }
1011
1012     if (binitres->errcode)
1013     {
1014         yaz_log(LOG_LOG, "Connection rejected by backend.");
1015         *resp->result = 0;
1016         assoc->state = ASSOC_DEAD;
1017     }
1018     else
1019         assoc->state = ASSOC_UP;
1020     return apdu;
1021 }
1022
1023 /*
1024  * These functions should be merged.
1025  */
1026
1027 static void set_addinfo (Z_DefaultDiagFormat *dr, char *addinfo)
1028 {
1029 #if ASN_COMPILED
1030     dr->which = Z_DefaultDiagFormat_v2Addinfo;
1031     dr->u.v2Addinfo = addinfo ? addinfo : "";
1032 #else
1033     dr->which = Z_DiagForm_v2AddInfo;
1034     dr->addinfo = addinfo ? addinfo : "";
1035 #endif
1036 }
1037
1038 /*
1039  * nonsurrogate diagnostic record.
1040  */
1041 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
1042 {
1043     int oid[OID_SIZE];
1044     Z_Records *rec = (Z_Records *)
1045         odr_malloc (assoc->encode, sizeof(*rec));
1046     oident bib1;
1047     int *err = (int *)
1048         odr_malloc (assoc->encode, sizeof(*err));
1049     Z_DiagRec *drec = (Z_DiagRec *)
1050         odr_malloc (assoc->encode, sizeof(*drec));
1051     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1052         odr_malloc (assoc->encode, sizeof(*dr));
1053
1054     bib1.proto = assoc->proto;
1055     bib1.oclass = CLASS_DIAGSET;
1056     bib1.value = VAL_BIB1;
1057
1058     yaz_log(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo :
1059         "NULL");
1060     *err = error;
1061     rec->which = Z_Records_NSD;
1062 #if ASN_COMPILED
1063     rec->u.nonSurrogateDiagnostic = dr;
1064 #else
1065     rec->u.nonSurrogateDiagnostic = drec;
1066     drec->which = Z_DiagRec_defaultFormat;
1067     drec->u.defaultFormat = dr;
1068 #endif
1069     dr->diagnosticSetId =
1070         odr_oiddup (assoc->encode, oid_ent_to_oid(&bib1, oid));
1071     dr->condition = err;
1072     set_addinfo (dr, addinfo);
1073     return rec;
1074 }
1075
1076 /*
1077  * surrogate diagnostic.
1078  */
1079 static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname,
1080                                           int error, char *addinfo)
1081 {
1082     int oid[OID_SIZE];
1083     Z_NamePlusRecord *rec = (Z_NamePlusRecord *)
1084         odr_malloc (assoc->encode, sizeof(*rec));
1085     int *err = (int *)odr_malloc (assoc->encode, sizeof(*err));
1086     oident bib1;
1087     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
1088     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1089         odr_malloc (assoc->encode, sizeof(*dr));
1090
1091     bib1.proto = assoc->proto;
1092     bib1.oclass = CLASS_DIAGSET;
1093     bib1.value = VAL_BIB1;
1094
1095     yaz_log(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
1096     *err = error;
1097     rec->databaseName = dbname;
1098     rec->which = Z_NamePlusRecord_surrogateDiagnostic;
1099     rec->u.surrogateDiagnostic = drec;
1100     drec->which = Z_DiagRec_defaultFormat;
1101     drec->u.defaultFormat = dr;
1102     dr->diagnosticSetId = odr_oiddup (assoc->encode,
1103                                       oid_ent_to_oid(&bib1, oid));
1104     dr->condition = err;
1105     set_addinfo (dr, addinfo);
1106
1107     return rec;
1108 }
1109
1110 /*
1111  * multiple nonsurrogate diagnostics.
1112  */
1113 static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo)
1114 {
1115     int oid[OID_SIZE];
1116     Z_DiagRecs *recs = (Z_DiagRecs *)odr_malloc (assoc->encode, sizeof(*recs));
1117     int *err = (int *)odr_malloc (assoc->encode, sizeof(*err));
1118     oident bib1;
1119     Z_DiagRec **recp = (Z_DiagRec **)odr_malloc (assoc->encode, sizeof(*recp));
1120     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
1121     Z_DefaultDiagFormat *rec = (Z_DefaultDiagFormat *)odr_malloc (assoc->encode, sizeof(*rec));
1122
1123     yaz_log(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo ? addinfo : "");
1124     bib1.proto = assoc->proto;
1125     bib1.oclass = CLASS_DIAGSET;
1126     bib1.value = VAL_BIB1;
1127
1128     *err = error;
1129     recs->num_diagRecs = 1;
1130     recs->diagRecs = recp;
1131     recp[0] = drec;
1132     drec->which = Z_DiagRec_defaultFormat;
1133     drec->u.defaultFormat = rec;
1134
1135     rec->diagnosticSetId = odr_oiddup (assoc->encode,
1136                                       oid_ent_to_oid(&bib1, oid));
1137     rec->condition = err;
1138
1139 #ifdef ASN_COMPILED
1140     rec->which = Z_DefaultDiagFormat_v2Addinfo;
1141     rec->u.v2Addinfo = addinfo ? addinfo : "";
1142 #else
1143     rec->which = Z_DiagForm_v2AddInfo;
1144     rec->addinfo = addinfo ? addinfo : "";
1145 #endif
1146     return recs;
1147 }
1148
1149 static Z_Records *pack_records(association *a, char *setname, int start,
1150                                int *num, Z_RecordComposition *comp,
1151                                int *next, int *pres, oid_value format,
1152                                Z_ReferenceId *referenceId,
1153                                int *oid)
1154 {
1155     int recno, total_length = 0, toget = *num, dumped_records = 0;
1156     Z_Records *records =
1157         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
1158     Z_NamePlusRecordList *reclist =
1159         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
1160     Z_NamePlusRecord **list =
1161         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
1162
1163     records->which = Z_Records_DBOSD;
1164     records->u.databaseOrSurDiagnostics = reclist;
1165     reclist->num_records = 0;
1166     reclist->records = list;
1167     *pres = Z_PRES_SUCCESS;
1168     *num = 0;
1169     *next = 0;
1170
1171     yaz_log(LOG_LOG, "Request to pack %d+%d", start, toget);
1172     yaz_log(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
1173         a->maximumRecordSize);
1174     for (recno = start; reclist->num_records < toget; recno++)
1175     {
1176         bend_fetch_rr freq;
1177         Z_NamePlusRecord *thisrec;
1178         int this_length = 0;
1179         /*
1180          * we get the number of bytes allocated on the stream before any
1181          * allocation done by the backend - this should give us a reasonable
1182          * idea of the total size of the data so far.
1183          */
1184         total_length = odr_total(a->encode) - dumped_records;
1185         freq.errcode = 0;
1186         freq.errstring = 0;
1187         freq.basename = 0;
1188         freq.len = 0;
1189         freq.record = 0;
1190         freq.last_in_set = 0;
1191         freq.setname = setname;
1192         freq.surrogate_flag = 0;
1193         freq.number = recno;
1194         freq.comp = comp;
1195         freq.request_format = format;
1196         freq.request_format_raw = oid;
1197         freq.output_format = format;
1198         freq.output_format_raw = 0;
1199         freq.stream = a->encode;
1200         freq.print = a->print;
1201         freq.surrogate_flag = 0;
1202         freq.referenceId = referenceId;
1203         (*a->init->bend_fetch)(a->backend, &freq);
1204         /* backend should be able to signal whether error is system-wide
1205            or only pertaining to current record */
1206         if (freq.errcode)
1207         {
1208             if (!freq.surrogate_flag)
1209             {
1210                 *pres = Z_PRES_FAILURE;
1211                 return diagrec(a, freq.errcode, freq.errstring);
1212             }
1213             reclist->records[reclist->num_records] =
1214                 surrogatediagrec(a, freq.basename, freq.errcode,
1215                                  freq.errstring);
1216             reclist->num_records++;
1217             *next = freq.last_in_set ? 0 : recno + 1;
1218             continue;
1219         }
1220         if (freq.len >= 0)
1221             this_length = freq.len;
1222         else
1223             this_length = odr_total(a->encode) - total_length;
1224         yaz_log(LOG_DEBUG, "  fetched record, len=%d, total=%d",
1225             this_length, total_length);
1226         if (this_length + total_length > a->preferredMessageSize)
1227         {
1228             /* record is small enough, really */
1229             if (this_length <= a->preferredMessageSize)
1230             {
1231                 yaz_log(LOG_DEBUG, "  Dropped last normal-sized record");
1232                 *pres = Z_PRES_PARTIAL_2;
1233                 break;
1234             }
1235             /* record can only be fetched by itself */
1236             if (this_length < a->maximumRecordSize)
1237             {
1238                 yaz_log(LOG_DEBUG, "  Record > prefmsgsz");
1239                 if (toget > 1)
1240                 {
1241                     yaz_log(LOG_DEBUG, "  Dropped it");
1242                     reclist->records[reclist->num_records] =
1243                          surrogatediagrec(a, freq.basename, 16, 0);
1244                     reclist->num_records++;
1245                     *next = freq.last_in_set ? 0 : recno + 1;
1246                     dumped_records += this_length;
1247                     continue;
1248                 }
1249             }
1250             else /* too big entirely */
1251             {
1252                 yaz_log(LOG_DEBUG, "Record > maxrcdsz");
1253                 reclist->records[reclist->num_records] =
1254                     surrogatediagrec(a, freq.basename, 17, 0);
1255                 reclist->num_records++;
1256                 *next = freq.last_in_set ? 0 : recno + 1;
1257                 dumped_records += this_length;
1258                 continue;
1259             }
1260         }
1261
1262         if (!(thisrec = (Z_NamePlusRecord *)
1263               odr_malloc(a->encode, sizeof(*thisrec))))
1264             return 0;
1265         if (!(thisrec->databaseName = (char *)odr_malloc(a->encode,
1266             strlen(freq.basename) + 1)))
1267             return 0;
1268         strcpy(thisrec->databaseName, freq.basename);
1269         thisrec->which = Z_NamePlusRecord_databaseRecord;
1270
1271         if (freq.output_format_raw)
1272         {
1273             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
1274             freq.output_format = ident->value;
1275         }
1276         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
1277                                                  freq.record, freq.len);
1278         if (!thisrec->u.databaseRecord)
1279             return 0;
1280         reclist->records[reclist->num_records] = thisrec;
1281         reclist->num_records++;
1282         *next = freq.last_in_set ? 0 : recno + 1;
1283     }
1284     *num = reclist->num_records;
1285     return records;
1286 }
1287
1288 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
1289     int *fd)
1290 {
1291     Z_SearchRequest *req = reqb->request->u.searchRequest;
1292     bend_search_rr *bsrr =
1293         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
1294
1295     yaz_log(LOG_LOG, "Got SearchRequest.");
1296     bsrr->fd = fd;
1297     bsrr->request = reqb;
1298     bsrr->association = assoc;
1299     bsrr->referenceId = req->referenceId;
1300     save_referenceId (reqb, bsrr->referenceId);
1301
1302     yaz_log (LOG_LOG, "ResultSet '%s'", req->resultSetName);
1303     if (req->databaseNames)
1304     {
1305         int i;
1306         for (i = 0; i < req->num_databaseNames; i++)
1307             yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1308     }
1309     switch (req->query->which)
1310     {
1311     case Z_Query_type_1: case Z_Query_type_101:
1312         log_rpn_query (req->query->u.type_1);
1313     }
1314     if (assoc->init->bend_search)
1315     {
1316         bsrr->setname = req->resultSetName;
1317         bsrr->replace_set = *req->replaceIndicator;
1318         bsrr->num_bases = req->num_databaseNames;
1319         bsrr->basenames = req->databaseNames;
1320         bsrr->query = req->query;
1321         bsrr->stream = assoc->encode;
1322         bsrr->decode = assoc->decode;
1323         bsrr->print = assoc->print;
1324         bsrr->errcode = 0;
1325         bsrr->hits = 0;
1326         bsrr->errstring = NULL;
1327         (assoc->init->bend_search)(assoc->backend, bsrr);
1328         if (!bsrr->request)
1329             return 0;
1330     }
1331 #if 0
1332     else
1333     {
1334         bend_searchrequest bsrq;
1335         bend_searchresult *bsrt;
1336
1337         bsrq.setname = req->resultSetName;
1338         bsrq.replace_set = *req->replaceIndicator;
1339         bsrq.num_bases = req->num_databaseNames;
1340         bsrq.basenames = req->databaseNames;
1341         bsrq.query = req->query;
1342         bsrq.referenceId = req->referenceId;
1343         bsrq.stream = assoc->encode;
1344         bsrq.decode = assoc->decode;
1345         bsrq.print = assoc->print;
1346         if (!(bsrt = bend_search (assoc->backend, &bsrq, fd)))
1347             return 0;
1348         bsrr->hits = bsrt->hits;
1349         bsrr->errcode = bsrt->errcode;
1350         bsrr->errstring = bsrt->errstring;
1351     }
1352 #endif
1353     return response_searchRequest(assoc, reqb, bsrr, fd);
1354 }
1355
1356 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
1357
1358 /*
1359  * Prepare a searchresponse based on the backend results. We probably want
1360  * to look at making the fetching of records nonblocking as well, but
1361  * so far, we'll keep things simple.
1362  * If bsrt is null, that means we're called in response to a communications
1363  * event, and we'll have to get the response for ourselves.
1364  */
1365 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
1366     bend_search_rr *bsrt, int *fd)
1367 {
1368     Z_SearchRequest *req = reqb->request->u.searchRequest;
1369     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1370     Z_SearchResponse *resp = (Z_SearchResponse *)
1371         odr_malloc (assoc->encode, sizeof(*resp));
1372     int *nulint = (int *)odr_malloc (assoc->encode, sizeof(*nulint));
1373     bool_t *sr = (bool_t *)odr_malloc (assoc->encode, sizeof(*sr));
1374     int *next = (int *)odr_malloc (assoc->encode, sizeof(*next));
1375     int *none = (int *)odr_malloc (assoc->encode, sizeof(*none));
1376
1377     *nulint = 0;
1378     *sr = 1;
1379     *next = 0;
1380     *none = Z_RES_NONE;
1381
1382     apdu->which = Z_APDU_searchResponse;
1383     apdu->u.searchResponse = resp;
1384     resp->referenceId = req->referenceId;
1385     resp->additionalSearchInfo = 0;
1386     resp->otherInfo = 0;
1387     *fd = -1;
1388     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
1389     {
1390         yaz_log(LOG_FATAL, "Bad result from backend");
1391         return 0;
1392     }
1393     else if (bsrt->errcode)
1394     {
1395         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
1396         resp->resultCount = nulint;
1397         resp->numberOfRecordsReturned = nulint;
1398         resp->nextResultSetPosition = nulint;
1399         resp->searchStatus = nulint;
1400         resp->resultSetStatus = none;
1401         resp->presentStatus = 0;
1402     }
1403     else
1404     {
1405         int *toget = (int *)odr_malloc (assoc->encode, sizeof(*toget));
1406         int *presst = (int *)odr_malloc (assoc->encode, sizeof(*presst));
1407         Z_RecordComposition comp, *compp = 0;
1408
1409         *toget = 0;
1410         *presst = 0;
1411         resp->records = 0;
1412         resp->resultCount = &bsrt->hits;
1413
1414         comp.which = Z_RecordComp_simple;
1415         /* how many records does the user agent want, then? */
1416         if (bsrt->hits <= *req->smallSetUpperBound)
1417         {
1418             *toget = bsrt->hits;
1419             if ((comp.u.simple = req->smallSetElementSetNames))
1420                 compp = &comp;
1421         }
1422         else if (bsrt->hits < *req->largeSetLowerBound)
1423         {
1424             *toget = *req->mediumSetPresentNumber;
1425             if (*toget > bsrt->hits)
1426                 *toget = bsrt->hits;
1427             if ((comp.u.simple = req->mediumSetElementSetNames))
1428                 compp = &comp;
1429         }
1430         else
1431             *toget = 0;
1432
1433         if (*toget && !resp->records)
1434         {
1435             oident *prefformat;
1436             oid_value form;
1437
1438             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
1439                 prefformat->oclass != CLASS_RECSYN)
1440                 form = VAL_NONE;
1441             else
1442                 form = prefformat->value;
1443             resp->records = pack_records(assoc, req->resultSetName, 1,
1444                 toget, compp, next, presst, form, req->referenceId,
1445                                          req->preferredRecordSyntax);
1446             if (!resp->records)
1447                 return 0;
1448             resp->numberOfRecordsReturned = toget;
1449             resp->nextResultSetPosition = next;
1450             resp->searchStatus = sr;
1451             resp->resultSetStatus = 0;
1452             resp->presentStatus = presst;
1453         }
1454         else
1455         {
1456             if (*resp->resultCount)
1457                 *next = 1;
1458             resp->numberOfRecordsReturned = nulint;
1459             resp->nextResultSetPosition = next;
1460             resp->searchStatus = sr;
1461             resp->resultSetStatus = 0;
1462             resp->presentStatus = 0;
1463         }
1464     }
1465     return apdu;
1466 }
1467
1468 /*
1469  * Maybe we got a little over-friendly when we designed bend_fetch to
1470  * get only one record at a time. Some backends can optimise multiple-record
1471  * fetches, and at any rate, there is some overhead involved in
1472  * all that selecting and hopping around. Problem is, of course, that the
1473  * frontend can't know ahead of time how many records it'll need to
1474  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
1475  * is downright lousy as a bulk data transfer protocol.
1476  *
1477  * To start with, we'll do the fetching of records from the backend
1478  * in one operation: To save some trips in and out of the event-handler,
1479  * and to simplify the interface to pack_records. At any rate, asynch
1480  * operation is more fun in operations that have an unpredictable execution
1481  * speed - which is normally more true for search than for present.
1482  */
1483 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
1484                                       int *fd)
1485 {
1486     Z_PresentRequest *req = reqb->request->u.presentRequest;
1487     oident *prefformat;
1488     oid_value form;
1489     Z_APDU *apdu;
1490     Z_PresentResponse *resp;
1491     int *presst;
1492     int *next;
1493     int *num;
1494
1495     yaz_log(LOG_LOG, "Got PresentRequest.");
1496
1497     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
1498         prefformat->oclass != CLASS_RECSYN)
1499         form = VAL_NONE;
1500     else
1501         form = prefformat->value;
1502     if (assoc->init->bend_present)
1503     {
1504         bend_present_rr *bprr = (bend_present_rr *)
1505             nmem_malloc (reqb->request_mem, sizeof(*bprr));
1506         bprr->setname = req->resultSetId;
1507         bprr->start = *req->resultSetStartPoint;
1508         bprr->number = *req->numberOfRecordsRequested;
1509         bprr->format = form;
1510         bprr->comp = req->recordComposition;
1511         bprr->referenceId = req->referenceId;
1512         bprr->stream = assoc->encode;
1513         bprr->print = assoc->print;
1514         bprr->request = reqb;
1515         bprr->association = assoc;
1516         bprr->errcode = 0;
1517         bprr->errstring = NULL;
1518         (*assoc->init->bend_present)(assoc->backend, bprr);
1519
1520         if (!bprr->request)
1521             return 0;
1522     }
1523     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1524     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
1525     presst = (int *)odr_malloc (assoc->encode, sizeof(*presst));
1526     next = (int *)odr_malloc (assoc->encode, sizeof(*next));
1527     num = (int *)odr_malloc (assoc->encode, sizeof(*num));
1528     *presst = 0;
1529     *next = 0;
1530     *num = *req->numberOfRecordsRequested;
1531
1532     apdu->which = Z_APDU_presentResponse;
1533     apdu->u.presentResponse = resp;
1534     resp->referenceId = req->referenceId;
1535     resp->otherInfo = 0;
1536
1537     resp->records =
1538         pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
1539                      num, req->recordComposition, next, presst, form,
1540                      req->referenceId, req->preferredRecordSyntax);
1541     if (!resp->records)
1542         return 0;
1543     resp->numberOfRecordsReturned = num;
1544     resp->presentStatus = presst;
1545     resp->nextResultSetPosition = next;
1546
1547     return apdu;
1548 }
1549
1550 #if 0
1551 static int bend_default_scan (void *handle, bend_scan_rr *rr)
1552 {
1553     bend_scanrequest srq;
1554     bend_scanresult *srs;
1555
1556     srq.num_bases = rr->num_bases;
1557     srq.basenames = rr->basenames;
1558     srq.attributeset = rr->attributeset;
1559     srq.referenceId = rr->referenceId;
1560     srq.term = rr->term;
1561     srq.term_position = rr->term_position;
1562     srq.num_entries = rr->num_entries;
1563     srq.stream = rr->stream;
1564     srq.print = rr->print;
1565
1566     srs = bend_scan(handle, &srq, 0);
1567
1568     rr->term_position = srs->term_position;
1569     rr->num_entries = srs->num_entries;
1570     rr->entries = srs->entries;
1571     rr->status = srs->status;
1572     rr->errcode = srs->errcode;
1573     rr->errstring = srs->errstring;
1574     return 0;
1575 }
1576 #endif
1577
1578 /*
1579  * Scan was implemented rather in a hurry, and with support for only the basic
1580  * elements of the service in the backend API. Suggestions are welcome.
1581  */
1582 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
1583 {
1584     Z_ScanRequest *req = reqb->request->u.scanRequest;
1585     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1586     Z_ScanResponse *res = (Z_ScanResponse *)
1587         odr_malloc (assoc->encode, sizeof(*res));
1588     int *scanStatus = (int *)
1589         odr_malloc (assoc->encode, sizeof(*scanStatus));
1590     int *numberOfEntriesReturned = (int *)
1591         odr_malloc (assoc->encode, sizeof(*numberOfEntriesReturned));
1592     Z_ListEntries *ents = (Z_ListEntries *)
1593         odr_malloc (assoc->encode, sizeof(*ents));
1594     Z_DiagRecs *diagrecs_p = NULL;
1595     oident *attent;
1596     oident *attset;
1597
1598     yaz_log(LOG_LOG, "Got ScanRequest");
1599     *scanStatus = Z_Scan_failure;
1600     *numberOfEntriesReturned = 0;
1601
1602     apdu->which = Z_APDU_scanResponse;
1603     apdu->u.scanResponse = res;
1604     res->referenceId = req->referenceId;
1605     res->stepSize = 0;
1606     res->scanStatus = scanStatus;
1607     res->numberOfEntriesReturned = numberOfEntriesReturned;
1608     res->positionOfTerm = 0;
1609     res->entries = ents;
1610     ents->num_entries = 0;
1611     ents->entries = NULL;
1612     ents->num_nonsurrogateDiagnostics = 0;
1613     ents->nonsurrogateDiagnostics = NULL;
1614     res->attributeSet = 0;
1615     res->otherInfo = 0;
1616
1617     if (req->attributeSet && (!(attent = oid_getentbyoid(req->attributeSet)) ||
1618                               attent->oclass != CLASS_ATTSET
1619                               || attent->value != VAL_BIB1))
1620         diagrecs_p = diagrecs(assoc, 121, 0);
1621     else if (req->stepSize && *req->stepSize > 0)
1622         diagrecs_p = diagrecs(assoc, 205, 0);
1623     else
1624     {
1625         bend_scan_rr *bsrr = (bend_scan_rr *)
1626             odr_malloc (assoc->encode, sizeof(*bsrr));
1627         if (req->databaseNames)
1628         {
1629             int i;
1630             for (i = 0; i < req->num_databaseNames; i++)
1631                 yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1632         }
1633         bsrr->num_bases = req->num_databaseNames;
1634         bsrr->basenames = req->databaseNames;
1635         bsrr->num_entries = *req->numberOfTermsRequested;
1636         bsrr->term = req->termListAndStartPoint;
1637         bsrr->referenceId = req->referenceId;
1638         bsrr->stream = assoc->encode;
1639         bsrr->print = assoc->print;
1640         if (!(attset = oid_getentbyoid(req->attributeSet)) ||
1641             attset->oclass != CLASS_RECSYN)
1642             bsrr->attributeset = VAL_NONE;
1643         else
1644             bsrr->attributeset = attset->value;
1645         log_scan_term (req->termListAndStartPoint, attset->value);
1646         bsrr->term_position = req->preferredPositionInResponse ?
1647             *req->preferredPositionInResponse : 1;
1648         ((int (*)(void *, bend_scan_rr *))
1649          (*assoc->init->bend_scan))(assoc->backend, bsrr);
1650         if (bsrr->errcode)
1651             diagrecs_p = diagrecs(assoc, bsrr->errcode, bsrr->errstring);
1652         else
1653         {
1654             int i;
1655             Z_Entry **tab = (Z_Entry **)
1656                 odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
1657
1658             if (bsrr->status == BEND_SCAN_PARTIAL)
1659                 *scanStatus = Z_Scan_partial_5;
1660             else
1661                 *scanStatus = Z_Scan_success;
1662             ents->entries = tab;
1663             ents->num_entries = bsrr->num_entries;
1664             res->numberOfEntriesReturned = &ents->num_entries;
1665             res->positionOfTerm = &bsrr->term_position;
1666             for (i = 0; i < bsrr->num_entries; i++)
1667             {
1668                 Z_Entry *e;
1669                 Z_TermInfo *t;
1670                 Odr_oct *o;
1671
1672                 tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
1673                 if (bsrr->entries[i].occurrences >= 0)
1674                 {
1675                     e->which = Z_Entry_termInfo;
1676                     e->u.termInfo = t = (Z_TermInfo *)
1677                         odr_malloc(assoc->encode, sizeof(*t));
1678                     t->suggestedAttributes = 0;
1679                     t->displayTerm = 0;
1680                     t->alternativeTerm = 0;
1681                     t->byAttributes = 0;
1682                     t->otherTermInfo = 0;
1683                     t->globalOccurrences = &bsrr->entries[i].occurrences;
1684                     t->term = (Z_Term *)
1685                         odr_malloc(assoc->encode, sizeof(*t->term));
1686                     t->term->which = Z_Term_general;
1687                     t->term->u.general = o =
1688                         (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
1689                     o->buf = (unsigned char *)
1690                         odr_malloc(assoc->encode, o->len = o->size =
1691                                    strlen(bsrr->entries[i].term));
1692                     memcpy(o->buf, bsrr->entries[i].term, o->len);
1693                     yaz_log(LOG_DEBUG, "  term #%d: '%s' (%d)", i,
1694                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
1695                 }
1696                 else
1697                 {
1698                     Z_DiagRecs *drecs = diagrecs (assoc,
1699                                                   bsrr->entries[i].errcode,
1700                                                   bsrr->entries[i].errstring);
1701                     assert (drecs->num_diagRecs == 1);
1702                     e->which = Z_Entry_surrogateDiagnostic;
1703                     assert (drecs->diagRecs[0]);
1704                     e->u.surrogateDiagnostic = drecs->diagRecs[0];
1705                 }
1706             }
1707         }
1708     }
1709     if (diagrecs_p)
1710     {
1711         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
1712         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
1713     }
1714     return apdu;
1715 }
1716
1717 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
1718     int *fd)
1719 {
1720     Z_SortRequest *req = reqb->request->u.sortRequest;
1721     Z_SortResponse *res = (Z_SortResponse *)
1722         odr_malloc (assoc->encode, sizeof(*res));
1723     bend_sort_rr *bsrr = (bend_sort_rr *)
1724         odr_malloc (assoc->encode, sizeof(*bsrr));
1725
1726     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1727
1728     yaz_log(LOG_LOG, "Got SortRequest.");
1729
1730 #ifdef ASN_COMPILED
1731     bsrr->num_input_setnames = req->num_inputResultSetNames;
1732     bsrr->input_setnames = req->inputResultSetNames;
1733 #else
1734     bsrr->num_input_setnames = req->inputResultSetNames->num_strings;
1735     bsrr->input_setnames = req->inputResultSetNames->strings;
1736 #endif
1737     bsrr->referenceId = req->referenceId;
1738     bsrr->output_setname = req->sortedResultSetName;
1739     bsrr->sort_sequence = req->sortSequence;
1740     bsrr->stream = assoc->encode;
1741     bsrr->print = assoc->print;
1742
1743     bsrr->sort_status = Z_SortStatus_failure;
1744     bsrr->errcode = 0;
1745     bsrr->errstring = 0;
1746
1747     (*assoc->init->bend_sort)(assoc->backend, bsrr);
1748
1749     res->referenceId = bsrr->referenceId;
1750     res->sortStatus = (int *)
1751         odr_malloc (assoc->encode, sizeof(*res->sortStatus));
1752     *res->sortStatus = bsrr->sort_status;
1753     res->resultSetStatus = 0;
1754     if (bsrr->errcode)
1755     {
1756         Z_DiagRecs *dr = diagrecs (assoc, bsrr->errcode, bsrr->errstring);
1757 #ifdef ASN_COMPILED
1758         res->diagnostics = dr->diagRecs;
1759         res->num_diagnostics = dr->num_diagRecs;
1760 #else
1761         res->diagnostics = dr;
1762 #endif
1763     }
1764     else
1765     {
1766 #ifdef ASN_COMPILED
1767         res->num_diagnostics = 0;
1768 #endif
1769         res->diagnostics = 0;
1770     }
1771     res->otherInfo = 0;
1772
1773     apdu->which = Z_APDU_sortResponse;
1774     apdu->u.sortResponse = res;
1775     return apdu;
1776 }
1777
1778 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
1779     int *fd)
1780 {
1781     Z_DeleteResultSetRequest *req = reqb->request->u.deleteResultSetRequest;
1782     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
1783         odr_malloc (assoc->encode, sizeof(*res));
1784     bend_delete_rr *bdrr = (bend_delete_rr *)
1785         odr_malloc (assoc->encode, sizeof(*bdrr));
1786     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1787
1788     yaz_log(LOG_LOG, "Got DeleteRequest.");
1789
1790     bdrr->num_setnames = req->num_resultSetList;
1791     bdrr->setnames = req->resultSetList;
1792     bdrr->stream = assoc->encode;
1793     bdrr->print = assoc->print;
1794     bdrr->function = *req->deleteFunction;
1795     bdrr->referenceId = req->referenceId;
1796     bdrr->statuses = 0;
1797     if (bdrr->num_setnames > 0)
1798     {
1799         int i;
1800         bdrr->statuses = odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
1801                                     bdrr->num_setnames);
1802         for (i = 0; i < bdrr->num_setnames; i++)
1803             bdrr->statuses[i] = 0;
1804     }
1805     (*assoc->init->bend_delete)(assoc->backend, bdrr);
1806
1807     res->referenceId = req->referenceId;
1808
1809     res->deleteOperationStatus = (int *)
1810         odr_malloc (assoc->encode, sizeof(*res->deleteOperationStatus));
1811     *res->deleteOperationStatus = bdrr->delete_status;
1812
1813     res->deleteListStatuses = 0;
1814     if (bdrr->num_setnames > 0)
1815     {
1816         int i;
1817         res->deleteListStatuses = odr_malloc(assoc->encode,
1818                                              sizeof(*res->deleteListStatuses));
1819         res->deleteListStatuses->num = bdrr->num_setnames;
1820         res->deleteListStatuses->elements =
1821             odr_malloc (assoc->encode,
1822                         sizeof(*res->deleteListStatuses->elements) *
1823                         bdrr->num_setnames);
1824         for (i = 0; i<bdrr->num_setnames; i++)
1825         {
1826             res->deleteListStatuses->elements[i] =
1827                 odr_malloc (assoc->encode,
1828                             sizeof(**res->deleteListStatuses->elements));
1829             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
1830             res->deleteListStatuses->elements[i]->id =
1831                 odr_strdup (assoc->encode, bdrr->setnames[i]);
1832
1833         }
1834     }
1835     res->numberNotDeleted = 0;
1836     res->bulkStatuses = 0;
1837     res->deleteMessage = 0;
1838     res->otherInfo = 0;
1839
1840     apdu->which = Z_APDU_deleteResultSetResponse;
1841     apdu->u.deleteResultSetResponse = res;
1842     return apdu;
1843 }
1844
1845 static void process_close(association *assoc, request *reqb)
1846 {
1847     Z_Close *req = reqb->request->u.close;
1848     static char *reasons[] =
1849     {
1850         "finished",
1851         "shutdown",
1852         "systemProblem",
1853         "costLimit",
1854         "resources",
1855         "securityViolation",
1856         "protocolError",
1857         "lackOfActivity",
1858         "peerAbort",
1859         "unspecified"
1860     };
1861
1862     yaz_log(LOG_LOG, "Got Close, reason %s, message %s",
1863         reasons[*req->closeReason], req->diagnosticInformation ?
1864         req->diagnosticInformation : "NULL");
1865     if (assoc->version < 3) /* to make do_force respond with close */
1866         assoc->version = 3;
1867     do_close_req(assoc, Z_Close_finished,
1868                  "Association terminated by client", reqb);
1869 }
1870
1871 void save_referenceId (request *reqb, Z_ReferenceId *refid)
1872 {
1873     if (refid)
1874     {
1875         reqb->len_refid = refid->len;
1876         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
1877         memcpy (reqb->refid, refid->buf, refid->len);
1878     }
1879     else
1880     {
1881         reqb->len_refid = 0;
1882         reqb->refid = NULL;
1883     }
1884 }
1885
1886 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
1887 {
1888     process_response (a, req, res);
1889 }
1890
1891 bend_request bend_request_mk (bend_association a)
1892 {
1893     request *nreq = request_get (&a->outgoing);
1894     nreq->request_mem = nmem_create ();
1895     return nreq;
1896 }
1897
1898 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
1899 {
1900     Z_ReferenceId *id;
1901     if (!req->refid)
1902         return 0;
1903     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
1904     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
1905     id->len = id->size = req->len_refid;
1906     memcpy (id->buf, req->refid, req->len_refid);
1907     return id;
1908 }
1909
1910 void bend_request_destroy (bend_request *req)
1911 {
1912     nmem_destroy((*req)->request_mem);
1913     request_release(*req);
1914     *req = NULL;
1915 }
1916
1917 int bend_backend_respond (bend_association a, bend_request req)
1918 {
1919     char *msg;
1920     int r;
1921     r = process_request (a, req, &msg);
1922     if (r < 0)
1923         logf (LOG_WARN, "%s", msg);
1924     return r;
1925 }
1926
1927 void bend_request_setdata(bend_request r, void *p)
1928 {
1929     r->clientData = p;
1930 }
1931
1932 void *bend_request_getdata(bend_request r)
1933 {
1934     return r->clientData;
1935 }
1936
1937 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
1938 {
1939     bend_segment_rr request;
1940
1941     request.segment = reqb->request->u.segmentRequest;
1942     request.stream = assoc->encode;
1943     request.decode = assoc->decode;
1944     request.print = assoc->print;
1945     request.association = assoc;
1946
1947     (*assoc->init->bend_segment)(assoc->backend, &request);
1948
1949     return 0;
1950 }
1951
1952 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
1953 {
1954     bend_esrequest_rr esrequest;
1955
1956     Z_ExtendedServicesRequest *req = reqb->request->u.extendedServicesRequest;
1957     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
1958
1959     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
1960
1961     yaz_log(LOG_DEBUG,"inside Process esRequest");
1962
1963     esrequest.esr = reqb->request->u.extendedServicesRequest;
1964     esrequest.stream = assoc->encode;
1965     esrequest.decode = assoc->decode;
1966     esrequest.print = assoc->print;
1967     esrequest.errcode = 0;
1968     esrequest.errstring = NULL;
1969     esrequest.request = reqb;
1970     esrequest.association = assoc;
1971     esrequest.referenceId = req->referenceId;
1972
1973     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
1974
1975     /* If the response is being delayed, return NULL */
1976     if (esrequest.request == NULL)
1977         return(NULL);
1978
1979     resp->referenceId = req->referenceId;
1980
1981     if (esrequest.errcode == -1)
1982     {
1983         /* Backend service indicates request will be processed */
1984         yaz_log(LOG_DEBUG,"Request could be processed...Accepted !");
1985         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
1986     }
1987     else if (esrequest.errcode == 0)
1988     {
1989         /* Backend service indicates request will be processed */
1990         yaz_log(LOG_DEBUG,"Request could be processed...Done !");
1991         *resp->operationStatus = Z_ExtendedServicesResponse_done;
1992     }
1993     else
1994     {
1995         Z_DiagRecs *diagRecs = diagrecs (assoc, esrequest.errcode,
1996                                          esrequest.errstring);
1997
1998         /* Backend indicates error, request will not be processed */
1999         yaz_log(LOG_DEBUG,"Request could not be processed...failure !");
2000         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
2001         resp->num_diagnostics = diagRecs->num_diagRecs;
2002         resp->diagnostics = diagRecs->diagRecs;
2003     }
2004     /* Do something with the members of bend_extendedservice */
2005
2006     yaz_log(LOG_DEBUG,"Send the result apdu");
2007     return apdu;
2008 }