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