server/seshigh.c

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