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