server/seshigh.c

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