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