server/seshigh.c

   1 /*
   2  * Copyright (c) 1995, Index Data
   3  * See the file LICENSE for details.
   4  * Sebastian Hammer, Adam Dickmeiss
   5  *
   6  * $Log: seshigh.c,v $
   7  * Revision 1.60  1996-05-30 11:03:10  quinn
   8  * Fixed NextresultSetPosition bug fixed.
   9  *
  10  * Revision 1.59  1996/05/14  09:26:46  quinn
  11  * Added attribute set to scan backend
  12  *
  13  * Revision 1.58  1996/02/20  12:53:04  quinn
  14  * Chanes to SCAN
  15  *
  16  * Revision 1.57  1996/01/02  08:57:47  quinn
  17  * Changed enums in the ASN.1 .h files to #defines. Changed oident.class to oclass
  18  *
  19  * Revision 1.56  1995/12/14  11:09:57  quinn
  20  * Work on Explain
  21  *
  22  * Revision 1.55  1995/11/08  17:41:37  quinn
  23  * Smallish.
  24  *
  25  * Revision 1.54  1995/11/08  15:11:29  quinn
  26  * Log of close transmit.
  27  *
  28  * Revision 1.53  1995/11/01  13:54:58  quinn
  29  * Minor adjustments
  30  *
  31  * Revision 1.52  1995/11/01  12:19:13  quinn
  32  * Second attempt to fix same bug.
  33  *
  34  * Revision 1.50  1995/10/25  16:58:32  quinn
  35  * Simple.
  36  *
  37  * Revision 1.49  1995/10/16  13:51:53  quinn
  38  * Changes to provide Especs to the backend.
  39  *
  40  * Revision 1.48  1995/10/06  08:51:20  quinn
  41  * Added Write-buffer.
  42  *
  43  * Revision 1.47  1995/08/29  14:24:16  quinn
  44  * Added second half of close-handshake
  45  *
  46  * Revision 1.46  1995/08/29  11:17:58  quinn
  47  * Added code to receive close
  48  *
  49  * Revision 1.45  1995/08/21  09:11:00  quinn
  50  * Smallish fixes to suppport new formats.
  51  *
  52  * Revision 1.44  1995/08/17  12:45:25  quinn
  53  * Fixed minor problems with GRS-1. Added support in c&s.
  54  *
  55  * Revision 1.43  1995/08/15  12:00:31  quinn
  56  * Updated External
  57  *
  58  * Revision 1.42  1995/08/15  11:16:50  quinn
  59  *
  60  * Revision 1.41  1995/08/02  10:23:06  quinn
  61  * Smallish
  62  *
  63  * Revision 1.40  1995/07/31  14:34:26  quinn
  64  * Fixed bug in process_searchResponse (numberOfRecordsReturned).
  65  *
  66  * Revision 1.39  1995/06/27  13:21:00  quinn
  67  * SUTRS support
  68  *
  69  * Revision 1.38  1995/06/19  12:39:11  quinn
  70  * Fixed bug in timeout code. Added BER dumper.
  71  *
  72  * Revision 1.37  1995/06/16  13:16:14  quinn
  73  * Fixed Defaultdiagformat.
  74  *
  75  * Revision 1.36  1995/06/16  10:31:36  quinn
  76  * Added session timeout.
  77  *
  78  * Revision 1.35  1995/06/15  07:45:14  quinn
  79  * Moving to v3.
  80  *
  81  * Revision 1.34  1995/06/14  15:26:46  quinn
  82  * *** empty log message ***
  83  *
  84  * Revision 1.33  1995/06/06  14:57:05  quinn
  85  * Better diagnostics.
  86  *
  87  * Revision 1.32  1995/06/06  08:41:44  quinn
  88  * Better diagnostics.
  89  *
  90  * Revision 1.31  1995/06/06  08:15:37  quinn
  91  * Cosmetic.
  92  *
  93  * Revision 1.30  1995/06/05  10:53:32  quinn
  94  * Added a better SCAN.
  95  *
  96  * Revision 1.29  1995/06/01  11:25:03  quinn
  97  * Smallish.
  98  *
  99  * Revision 1.28  1995/06/01  11:21:01  quinn
 100  * Attempting to fix a bug in pack-records. replaced break with continue
 101  * for large records, according to standard.
 102  *
 103  * Revision 1.27  1995/05/29  08:12:06  quinn
 104  * Moved oid to util
 105  *
 106  * Revision 1.26  1995/05/18  13:02:12  quinn
 107  * Smallish.
 108  *
 109  * Revision 1.25  1995/05/17  08:42:26  quinn
 110  * Transfer auth info to backend. Allow backend to reject init gracefully.
 111  *
 112  * Revision 1.24  1995/05/16  08:51:04  quinn
 113  * License, documentation, and memory fixes
 114  *
 115  * Revision 1.23  1995/05/15  13:25:10  quinn
 116  * Fixed memory bug.
 117  *
 118  * Revision 1.22  1995/05/15  11:56:39  quinn
 119  * Asynchronous facilities. Restructuring of seshigh code.
 120  *
 121  * Revision 1.21  1995/05/02  08:53:19  quinn
 122  * Trying in vain to fix comm with ISODE
 123  *
 124  * Revision 1.20  1995/04/20  15:13:00  quinn
 125  * Cosmetic
 126  *
 127  * Revision 1.19  1995/04/18  08:15:34  quinn
 128  * Added dynamic memory allocation on encoding (whew). Code is now somewhat
 129  * neater. We'll make the same change for decoding one day.
 130  *
 131  * Revision 1.18  1995/04/17  11:28:25  quinn
 132  * Smallish
 133  *
 134  * Revision 1.17  1995/04/10  10:23:36  quinn
 135  * Some work to add scan and other things.
 136  *
 137  * Revision 1.16  1995/03/31  09:18:55  quinn
 138  * Added logging.
 139  *
 140  * Revision 1.15  1995/03/30  14:03:23  quinn
 141  * Added RFC1006 as separate library
 142  *
 143  * Revision 1.14  1995/03/30  12:18:17  quinn
 144  * Fixed bug.
 145  *
 146  * Revision 1.13  1995/03/30  09:09:24  quinn
 147  * Added state-handle and some support for asynchronous activities.
 148  *
 149  * Revision 1.12  1995/03/29  15:40:16  quinn
 150  * Ongoing work. Statserv is now dynamic by default
 151  *
 152  * Revision 1.11  1995/03/28  09:16:21  quinn
 153  * Added record packing to the search request
 154  *
 155  * Revision 1.10  1995/03/27  08:34:24  quinn
 156  * Added dynamic server functionality.
 157  * Released bindings to session.c (is now redundant)
 158  *
 159  * Revision 1.9  1995/03/22  15:01:26  quinn
 160  * Adjusting record packing.
 161  *
 162  * Revision 1.8  1995/03/22  10:13:21  quinn
 163  * Working on record packer
 164  *
 165  * Revision 1.7  1995/03/21  15:53:31  quinn
 166  * Little changes.
 167  *
 168  * Revision 1.6  1995/03/21  12:30:09  quinn
 169  * Beginning to add support for record packing.
 170  *
 171  * Revision 1.5  1995/03/17  10:44:13  quinn
 172  * Added catch of null-string in makediagrec
 173  *
 174  * Revision 1.4  1995/03/17  10:18:08  quinn
 175  * Added memory management.
 176  *
 177  * Revision 1.3  1995/03/16  17:42:39  quinn
 178  * Little changes
 179  *
 180  * Revision 1.2  1995/03/16  13:29:01  quinn
 181  * Partitioned server.
 182  *
 183  * Revision 1.1  1995/03/15  16:02:10  quinn
 184  * Modded session.c to seshigh.c
 185  *
 186  */
 187
 188 /*
 189  * Frontend server logic.
 190  *
 191  * This code receives incoming APDUs, and handles client requests by means
 192  * of the backend API.
 193  *
 194  * Some of the code is getting quite involved, compared to simpler servers -
 195  * primarily because it is asynchronous both in the communication with
 196  * the user and the backend. We think the complexity will pay off in
 197  * the form of greater flexibility when more asynchronous facilities
 198  * are implemented.
 199  *
 200  * Memory management has become somewhat involved. In the simple case, where
 201  * only one PDU is pending at a time, it will simply reuse the same memory,
 202  * once it has found its working size. When we enable multiple concurrent
 203  * operations, perhaps even with multiple parallel calls to the backend, it
 204  * will maintain a pool of buffers for encoding and decoding, trying to
 205  * minimize memory allocation/deallocation during normal operation.
 206  *
 207  * TODOs include (and will be done in order of public interest):
 208  *
 209  * Support for EXPLAIN - provide simple meta-database system.
 210  * Support for access control.
 211  * Support for resource control.
 212  * Support for extended services - primarily Item Order.
 213  * Rest of Z39.50-1994
 214  *
 215  */
 216
 217 #include <stdlib.h>
 218 #include <stdio.h>
 219 #include <unistd.h>
 220 #include <assert.h>
 221 #include <sys/time.h>
 222
 223 #include <xmalloc.h>
 224 #include <comstack.h>
 225 #include <eventl.h>
 226 #include <session.h>
 227 #include <proto.h>
 228 #include <oid.h>
 229 #include <log.h>
 230 #include <statserv.h>
 231
 232 #include <backend.h>
 233
 234 static int process_request(association *assoc);
 235 void backend_response(IOCHAN i, int event);
 236 static int process_response(association *assoc, request *req, Z_APDU *res);
 237 static Z_APDU *process_initRequest(association *assoc, request *reqb);
 238 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
 239     int *fd);
 240 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
 241     bend_searchresult *bsrt, int *fd);
 242 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
 243     int *fd);
 244 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
 245 static void process_close(association *assoc, request *reqb);
 246
 247 static FILE *apduf = 0; /* for use in static mode */
 248 static statserv_options_block *control_block = 0;
 249
 250 /*
 251  * Create and initialize a new association-handle.
 252  *  channel  : iochannel for the current line.
 253  *  link     : communications channel.
 254  * Returns: 0 or a new association handle.
 255  */
 256 association *create_association(IOCHAN channel, COMSTACK link)
 257 {
 258     association *new;
 259
 260     if (!control_block)
 261         control_block = statserv_getcontrol();
 262     if (!(new = xmalloc(sizeof(*new))))
 263         return 0;
 264     new->client_chan = channel;
 265     new->client_link = link;
 266     if (!(new->decode = odr_createmem(ODR_DECODE)) ||
 267         !(new->encode = odr_createmem(ODR_ENCODE)))
 268         return 0;
 269     if (*control_block->apdufile)
 270     {
 271         char filename[256];
 272         FILE *f;
 273
 274         strcpy(filename, control_block->apdufile);
 275         if (!(new->print = odr_createmem(ODR_PRINT)))
 276             return 0;
 277         if (*control_block->apdufile != '-')
 278         {
 279             strcpy(filename, control_block->apdufile);
 280             if (!control_block->dynamic)
 281             {
 282                 if (!apduf)
 283                 {
 284                     if (!(apduf = fopen(filename, "w")))
 285                     {
 286                         logf(LOG_WARN|LOG_ERRNO, "%s", filename);
 287                         return 0;
 288                     }
 289                     setvbuf(apduf, 0, _IONBF, 0);
 290                 }
 291                 f = apduf;
 292             }
 293             else
 294             {
 295                 sprintf(filename + strlen(filename), ".%d", getpid());
 296                 if (!(f = fopen(filename, "w")))
 297                 {
 298                     logf(LOG_WARN|LOG_ERRNO, "%s", filename);
 299                     return 0;
 300                 }
 301                 setvbuf(f, 0, _IONBF, 0);
 302             }
 303             odr_setprint(new->print, f);
 304         }
 305     }
 306     else
 307         new->print = 0;
 308     new->input_buffer = 0;
 309     new->input_buffer_len = 0;
 310     new->backend = 0;
 311     new->state = ASSOC_NEW;
 312     request_initq(&new->incoming);
 313     request_initq(&new->outgoing);
 314     new->proto = cs_getproto(link);
 315     return new;
 316 }
 317
 318 /*
 319  * Free association and release resources.
 320  */
 321 void destroy_association(association *h)
 322 {
 323     odr_destroy(h->decode);
 324     odr_destroy(h->encode);
 325     if (h->print)
 326         odr_destroy(h->print);
 327     if (h->input_buffer)
 328     xfree(h->input_buffer);
 329     if (h->backend)
 330         bend_close(h->backend);
 331     while (request_deq(&h->incoming));
 332     while (request_deq(&h->outgoing));
 333    xfree(h);
 334 }
 335
 336 static void do_close(association *a, int reason, char *message)
 337 {
 338     Z_APDU apdu;
 339     Z_Close *cls = zget_Close(a->encode);
 340     request *req = request_get();
 341
 342     /* Purge request queue */
 343     while (request_deq(&a->incoming));
 344     while (request_deq(&a->outgoing));
 345     if (a->version >= 3)
 346     {
 347         logf(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
 348             reason, message ? message : "none");
 349         apdu.which = Z_APDU_close;
 350         apdu.u.close = cls;
 351         *cls->closeReason = reason;
 352         cls->diagnosticInformation = message;
 353         process_response(a, req, &apdu);
 354         iochan_settimeout(a->client_chan, 60);
 355     }
 356     else
 357     {
 358         logf(LOG_DEBUG, "v2 client. No Close PDU");
 359         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 360     }
 361     a->state = ASSOC_DEAD;
 362 }
 363
 364 /*
 365  * This is where PDUs from the client are read and the further
 366  * processing is initiated. Flow of control moves down through the
 367  * various process_* functions below, until the encoded result comes back up
 368  * to the output handler in here.
 369  *
 370  *  h     : the I/O channel that has an outstanding event.
 371  *  event : the current outstanding event.
 372  */
 373 void ir_session(IOCHAN h, int event)
 374 {
 375     int res;
 376     association *assoc = iochan_getdata(h);
 377     COMSTACK conn = assoc->client_link;
 378     request *req;
 379
 380     assert(h && conn && assoc);
 381     if (event == EVENT_TIMEOUT)
 382     {
 383         if (assoc->state != ASSOC_UP)
 384         {
 385             logf(LOG_LOG, "Final timeout - closing connection.");
 386             cs_close(conn);
 387             destroy_association(assoc);
 388             iochan_destroy(h);
 389         }
 390         else
 391         {
 392             logf(LOG_LOG, "Session idle too long. Sending close.");
 393             do_close(assoc, Z_Close_lackOfActivity, 0);
 394         }
 395         return;
 396     }
 397     if (event & EVENT_INPUT || event & EVENT_WORK) /* input */
 398     {
 399         if (event & EVENT_INPUT)
 400         {
 401             logf(LOG_DEBUG, "ir_session (input)");
 402             assert(assoc && conn);
 403             /* We aren't speaking to this fellow */
 404             if (assoc->state == ASSOC_DEAD)
 405             {
 406                 logf(LOG_LOG, "Closed connection after reject");
 407                 cs_close(conn);
 408                 destroy_association(assoc);
 409                 iochan_destroy(h);
 410                 return;
 411             }
 412             if ((res = cs_get(conn, &assoc->input_buffer,
 413                 &assoc->input_buffer_len)) <= 0)
 414             {
 415                 logf(LOG_LOG, "Connection closed by client");
 416                 cs_close(conn);
 417                 destroy_association(assoc);
 418                 iochan_destroy(h);
 419                 return;
 420             }
 421             else if (res == 1) /* incomplete read - wait for more  */
 422                 return;
 423             if (cs_more(conn)) /* more stuff - call us again later, please */
 424                 iochan_setevent(h, EVENT_INPUT);
 425
 426             /* we got a complete PDU. Let's decode it */
 427             logf(LOG_DEBUG, "Got PDU, %d bytes", res);
 428             req = request_get(); /* get a new request structure */
 429             odr_reset(assoc->decode);
 430             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 431             if (!z_APDU(assoc->decode, &req->request, 0))
 432             {
 433                 logf(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ",
 434                     odr_errlist[odr_geterror(assoc->decode)],
 435                     odr_offset(assoc->decode));
 436                 logf(LOG_LOG, "PDU dump:");
 437                 odr_dumpBER(log_file(), assoc->input_buffer, res);
 438                 do_close(assoc, Z_Close_protocolError, "Malformed package");
 439                 return;
 440             }
 441             req->request_mem = odr_extract_mem(assoc->decode);
 442             if (assoc->print && !z_APDU(assoc->print, &req->request, 0))
 443             {
 444                 logf(LOG_WARN, "ODR print error: %s",
 445                     odr_errlist[odr_geterror(assoc->print)]);
 446                 odr_reset(assoc->print);
 447             }
 448             request_enq(&assoc->incoming, req);
 449         }
 450
 451         /* can we do something yet? */
 452         req = request_head(&assoc->incoming);
 453         if (req->state == REQUEST_IDLE)
 454             if (process_request(assoc) < 0)
 455                 do_close(assoc, Z_Close_systemProblem, "Unknown error");
 456     }
 457     if (event & EVENT_OUTPUT)
 458     {
 459         request *req = request_head(&assoc->outgoing);
 460
 461         logf(LOG_DEBUG, "ir_session (output)");
 462         req->state = REQUEST_PENDING;
 463         switch (res = cs_put(conn, req->response, req->len_response))
 464         {
 465             case -1:
 466                 logf(LOG_LOG, "Connection closed by client");
 467                 cs_close(conn);
 468                 destroy_association(assoc);
 469                 iochan_destroy(h);
 470                 break;
 471             case 0: /* all sent - release the request structure */
 472                 logf(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 473                 nmem_destroy(req->request_mem);
 474                 request_deq(&assoc->outgoing);
 475                 request_release(req);
 476                 if (!request_head(&assoc->outgoing))
 477                     iochan_clearflag(h, EVENT_OUTPUT);
 478                 break;
 479             /* value of 1 -- partial send -- is simply ignored */
 480         }
 481     }
 482     if (event & EVENT_EXCEPT)
 483     {
 484         logf(LOG_DEBUG, "ir_session (exception)");
 485         cs_close(conn);
 486         destroy_association(assoc);
 487         iochan_destroy(h);
 488     }
 489 }
 490
 491 /*
 492  * Initiate request processing.
 493  */
 494 static int process_request(association *assoc)
 495 {
 496     request *req = request_head(&assoc->incoming);
 497     int fd = -1;
 498     Z_APDU *res;
 499
 500     logf(LOG_DEBUG, "process_request");
 501     assert(req && req->state == REQUEST_IDLE);
 502     switch (req->request->which)
 503     {
 504         case Z_APDU_initRequest:
 505             res = process_initRequest(assoc, req); break;
 506         case Z_APDU_searchRequest:
 507             res = process_searchRequest(assoc, req, &fd); break;
 508         case Z_APDU_presentRequest:
 509             res = process_presentRequest(assoc, req, &fd); break;
 510         case Z_APDU_scanRequest:
 511             res = process_scanRequest(assoc, req, &fd); break;
 512         case Z_APDU_close:
 513             process_close(assoc, req); return 0;
 514         default:
 515             logf(LOG_WARN, "Bad APDU received");
 516             return -1;
 517     }
 518     if (res)
 519     {
 520         logf(LOG_DEBUG, "  result immediately available");
 521         return process_response(assoc, req, res);
 522     }
 523     else if (fd < 0)
 524     {
 525         logf(LOG_WARN, "   bad result");
 526         return -1;
 527     }
 528     else /* no result yet - one will be provided later */
 529     {
 530         IOCHAN chan;
 531
 532         /* Set up an I/O handler for the fd supplied by the backend */
 533
 534         logf(LOG_DEBUG, "   establishing handler for result");
 535         req->state = REQUEST_PENDING;
 536         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
 537             abort();
 538         iochan_setdata(chan, assoc);
 539         return 0;
 540     }
 541 }
 542
 543 /*
 544  * Handle message from the backend.
 545  */
 546 void backend_response(IOCHAN i, int event)
 547 {
 548     association *assoc = iochan_getdata(i);
 549     request *req = request_head(&assoc->incoming);
 550     Z_APDU *res;
 551     int fd;
 552
 553     logf(LOG_DEBUG, "backend_response");
 554     assert(assoc && req && req->state != REQUEST_IDLE);
 555     /* determine what it is we're waiting for */
 556     switch (req->request->which)
 557     {
 558         case Z_APDU_searchRequest:
 559             res = response_searchRequest(assoc, req, 0, &fd); break;
 560 #if 0
 561         case Z_APDU_presentRequest:
 562             res = response_presentRequest(assoc, req, 0, &fd); break;
 563         case Z_APDU_scanRequest:
 564             res = response_scanRequest(assoc, req, 0, &fd); break;
 565 #endif
 566         default:
 567             logf(LOG_WARN, "Serious programmer's lapse or bug");
 568             abort();
 569     }
 570     if ((res && process_response(assoc, req, res) < 0) || fd < 0)
 571     {
 572         logf(LOG_LOG, "Fatal error when talking to backend");
 573         do_close(assoc, Z_Close_systemProblem, 0);
 574         iochan_destroy(i);
 575         return;
 576     }
 577     else if (!res) /* no result yet - try again later */
 578     {
 579         logf(LOG_DEBUG, "   no result yet");
 580         iochan_setfd(i, fd); /* in case fd has changed */
 581     }
 582 }
 583
 584 /*
 585  * Encode response, and transfer the request structure to the outgoing queue.
 586  */
 587 static int process_response(association *assoc, request *req, Z_APDU *res)
 588 {
 589     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
 590     if (!z_APDU(assoc->encode, &res, 0))
 591     {
 592         logf(LOG_WARN, "ODR error when encoding response: %s",
 593             odr_errlist[odr_geterror(assoc->decode)]);
 594         odr_reset(assoc->encode);
 595         return -1;
 596     }
 597     req->response = odr_getbuf(assoc->encode, &req->len_response,
 598         &req->size_response);
 599     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
 600     odr_reset(assoc->encode);
 601     if (assoc->print && !z_APDU(assoc->print, &res, 0))
 602     {
 603         logf(LOG_WARN, "ODR print error: %s",
 604             odr_errlist[odr_geterror(assoc->print)]);
 605         odr_reset(assoc->print);
 606     }
 607     /* change this when we make the backend reentrant */
 608     if (req == request_head(&assoc->incoming))
 609     {
 610         req->state = REQUEST_IDLE;
 611         request_deq(&assoc->incoming);
 612     }
 613     request_enq(&assoc->outgoing, req);
 614     /* turn the work over to the ir_session handler */
 615     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
 616     /* Is there more work to be done? give that to the input handler too */
 617     if (request_head(&assoc->incoming))
 618         iochan_setevent(assoc->client_chan, EVENT_WORK);
 619     return 0;
 620 }
 621
 622 /*
 623  * Handle init request.
 624  * At the moment, we don't check the options
 625  * anywhere else in the code - we just try not to do anything that would
 626  * break a naive client. We'll toss 'em into the association block when
 627  * we need them there.
 628  */
 629 static Z_APDU *process_initRequest(association *assoc, request *reqb)
 630 {
 631     Z_InitRequest *req = reqb->request->u.initRequest;
 632     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
 633     Z_InitResponse *resp = apdu->u.initResponse;
 634     bend_initrequest binitreq;
 635     bend_initresult *binitres;
 636     char options[100];
 637
 638     logf(LOG_LOG, "Got initRequest");
 639     if (req->implementationId)
 640         logf(LOG_LOG, "Id:        %s", req->implementationId);
 641     if (req->implementationName)
 642         logf(LOG_LOG, "Name:      %s", req->implementationName);
 643     if (req->implementationVersion)
 644         logf(LOG_LOG, "Version:   %s", req->implementationVersion);
 645
 646     binitreq.configname = "default-config";
 647     binitreq.auth = req->idAuthentication;
 648     if (!(binitres = bend_init(&binitreq)))
 649     {
 650         logf(LOG_WARN, "Bad response from backend.");
 651         return 0;
 652     }
 653
 654     assoc->backend = binitres->handle;
 655     resp->referenceId = req->referenceId;
 656     *options = '\0';
 657     /* let's tell the client what we can do */
 658     if (ODR_MASK_GET(req->options, Z_Options_search))
 659     {
 660         ODR_MASK_SET(resp->options, Z_Options_search);
 661         strcat(options, "srch");
 662     }
 663     if (ODR_MASK_GET(req->options, Z_Options_present))
 664     {
 665         ODR_MASK_SET(resp->options, Z_Options_present);
 666         strcat(options, " prst");
 667     }
 668 #if 0
 669     if (ODR_MASK_GET(req->options, Z_Options_delSet))
 670     {
 671         ODR_MASK_SET(&options, Z_Options_delSet);
 672         strcat(options, " del");
 673     }
 674 #endif
 675     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
 676     {
 677         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
 678         strcat(options, " namedresults");
 679     }
 680     if (ODR_MASK_GET(req->options, Z_Options_scan))
 681     {
 682         ODR_MASK_SET(resp->options, Z_Options_scan);
 683         strcat(options, " scan");
 684     }
 685     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
 686     {
 687         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
 688         strcat(options, " concurop");
 689     }
 690
 691     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
 692     {
 693         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
 694         assoc->version = 2; /* 1 & 2 are equivalent */
 695     }
 696     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
 697     {
 698         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
 699         assoc->version = 2;
 700     }
 701     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
 702     {
 703         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
 704         assoc->version = 3;
 705     }
 706     logf(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
 707     assoc->maximumRecordSize = *req->maximumRecordSize;
 708     if (assoc->maximumRecordSize > control_block->maxrecordsize)
 709         assoc->maximumRecordSize = control_block->maxrecordsize;
 710     assoc->preferredMessageSize = *req->preferredMessageSize;
 711     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
 712         assoc->preferredMessageSize = assoc->maximumRecordSize;
 713     resp->preferredMessageSize = &assoc->preferredMessageSize;
 714     resp->maximumRecordSize = &assoc->maximumRecordSize;
 715     resp->implementationName = "Index Data/YAZ Generic Frontend Server";
 716     if (binitres->errcode)
 717     {
 718         logf(LOG_LOG, "Connection rejected by backend.");
 719         *resp->result = 0;
 720         assoc->state = ASSOC_DEAD;
 721     }
 722     else
 723         assoc->state = ASSOC_UP;
 724     return apdu;
 725 }
 726
 727 /*
 728  * These functions should be merged.
 729  */
 730
 731 /*
 732  * nonsurrogate diagnostic record.
 733  */
 734 static Z_Records *diagrec(oid_proto proto, int error, char *addinfo)
 735 {
 736     static Z_Records rec;
 737     oident bib1;
 738     static int err;
 739 #ifdef Z_95
 740     static Z_DiagRec drec;
 741     static Z_DefaultDiagFormat dr;
 742 #else
 743     static Z_DiagRec dr;
 744 #endif
 745
 746     bib1.proto = proto;
 747     bib1.oclass = CLASS_DIAGSET;
 748     bib1.value = VAL_BIB1;
 749
 750     logf(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo :
 751         "NULL");
 752     err = error;
 753     rec.which = Z_Records_NSD;
 754 #ifdef Z_95
 755     rec.u.nonSurrogateDiagnostic = &drec;
 756     drec.which = Z_DiagRec_defaultFormat;
 757     drec.u.defaultFormat = &dr;
 758 #else
 759     rec.u.nonSurrogateDiagnostic = &dr;
 760 #endif
 761     dr.diagnosticSetId = oid_getoidbyent(&bib1);
 762     dr.condition = &err;
 763     dr.which = Z_DiagForm_v2AddInfo;
 764     dr.addinfo = addinfo ? addinfo : "";
 765     return &rec;
 766 }
 767
 768 /*
 769  * surrogate diagnostic.
 770  */
 771 static Z_NamePlusRecord *surrogatediagrec(oid_proto proto, char *dbname,
 772                                             int error, char *addinfo)
 773 {
 774     static Z_NamePlusRecord rec;
 775     static int err;
 776     oident bib1;
 777 #ifdef Z_95
 778     static Z_DiagRec drec;
 779     static Z_DefaultDiagFormat dr;
 780 #else
 781     static Z_DiagRec dr;
 782 #endif
 783
 784     bib1.proto = proto;
 785     bib1.oclass = CLASS_DIAGSET;
 786     bib1.value = VAL_BIB1;
 787
 788     logf(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
 789     err = error;
 790     rec.databaseName = dbname;
 791     rec.which = Z_NamePlusRecord_surrogateDiagnostic;
 792 #ifdef Z_95
 793     rec.u.surrogateDiagnostic = &drec;
 794     drec.which = Z_DiagRec_defaultFormat;
 795     drec.u.defaultFormat = &dr;
 796 #else
 797     rec.u.surrogateDiagnostic = &dr;
 798 #endif
 799     dr.diagnosticSetId = oid_getoidbyent(&bib1);
 800     dr.condition = &err;
 801     dr.which = Z_DiagForm_v2AddInfo;
 802     dr.addinfo = addinfo ? addinfo : "";
 803     return &rec;
 804 }
 805
 806 /*
 807  * multiple nonsurrogate diagnostics.
 808  */
 809 static Z_DiagRecs *diagrecs(oid_proto proto, int error, char *addinfo)
 810 {
 811     static Z_DiagRecs recs;
 812     static int err;
 813     oident bib1;
 814 #ifdef Z_95
 815     static Z_DiagRec *recp[1], drec;
 816     static Z_DefaultDiagFormat rec;
 817 #else
 818     static Z_DiagRec *recp[1], rec;
 819 #endif
 820
 821     logf(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo);
 822     bib1.proto = proto;
 823     bib1.oclass = CLASS_DIAGSET;
 824     bib1.value = VAL_BIB1;
 825
 826     err = error;
 827     recs.num_diagRecs = 1;
 828     recs.diagRecs = recp;
 829 #ifdef Z_95
 830     recp[0] = &drec;
 831     drec.which = Z_DiagRec_defaultFormat;
 832     drec.u.defaultFormat = &rec;
 833 #else
 834     recp[0] = &rec;
 835 #endif
 836     rec.diagnosticSetId = oid_getoidbyent(&bib1);
 837     rec.condition = &err;
 838     rec.which = Z_DiagForm_v2AddInfo;
 839     rec.addinfo = addinfo ? addinfo : "";
 840     return &recs;
 841 }
 842
 843 #define MAX_RECORDS 256
 844
 845 static Z_Records *pack_records(association *a, char *setname, int start,
 846                                 int *num, Z_RecordComposition *comp,
 847                                 int *next, int *pres, oid_value format)
 848 {
 849     int recno, total_length = 0, toget = *num;
 850     static Z_Records records;
 851     static Z_NamePlusRecordList reclist;
 852     static Z_NamePlusRecord *list[MAX_RECORDS];
 853     oident recform;
 854
 855     records.which = Z_Records_DBOSD;
 856     records.u.databaseOrSurDiagnostics = &reclist;
 857     reclist.num_records = 0;
 858     reclist.records = list;
 859     *pres = Z_PRES_SUCCESS;
 860     *num = 0;
 861     *next = 0;
 862
 863     logf(LOG_DEBUG, "Request to pack %d+%d", start, toget);
 864     logf(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
 865         a->maximumRecordSize);
 866     for (recno = start; reclist.num_records < toget; recno++)
 867     {
 868         bend_fetchrequest freq;
 869         bend_fetchresult *fres;
 870         Z_NamePlusRecord *thisrec;
 871         Z_DatabaseRecord *thisext;
 872         int this_length;
 873
 874         /*
 875          * we get the number of bytes allocated on the stream before any
 876          * allocation done by the backend - this should give us a reasonable
 877          * idea of the total size of the data so far.
 878          */
 879         total_length = odr_total(a->encode);
 880         if (reclist.num_records == MAX_RECORDS - 1)
 881         {
 882             *pres = Z_PRES_PARTIAL_2;
 883             break;
 884         }
 885         freq.setname = setname;
 886         freq.number = recno;
 887         freq.comp = comp;
 888         freq.format = format;
 889         freq.stream = a->encode;
 890         if (!(fres = bend_fetch(a->backend, &freq, 0)))
 891         {
 892             *pres = Z_PRES_FAILURE;
 893             return diagrec(a->proto, 2, "Backend interface problem");
 894         }
 895         /* backend should be able to signal whether error is system-wide
 896            or only pertaining to current record */
 897         if (fres->errcode)
 898         {
 899             *pres = Z_PRES_FAILURE;
 900             return diagrec(a->proto, fres->errcode, fres->errstring);
 901         }
 902         if (fres->len >= 0)
 903             this_length = fres->len;
 904         else
 905             this_length = odr_total(a->encode) - total_length;
 906         logf(LOG_DEBUG, "  fetched record, len=%d, total=%d",
 907             this_length, total_length);
 908         if (this_length + total_length > a->preferredMessageSize)
 909         {
 910             /* record is small enough, really */
 911             if (this_length <= a->preferredMessageSize)
 912             {
 913                 logf(LOG_DEBUG, "  Dropped last normal-sized record");
 914                 *pres = Z_PRES_PARTIAL_2;
 915                 break;
 916             }
 917             /* record can only be fetched by itself */
 918             if (this_length < a->maximumRecordSize)
 919             {
 920                 logf(LOG_DEBUG, "  Record > prefmsgsz");
 921                 if (toget > 1)
 922                 {
 923                     logf(LOG_DEBUG, "  Dropped it");
 924                     reclist.records[reclist.num_records] =
 925                          surrogatediagrec(a->proto, fres->basename, 16, 0);
 926                     reclist.num_records++;
 927                     *next = fres->last_in_set ? 0 : recno + 1;
 928                     continue;
 929                 }
 930             }
 931             else /* too big entirely */
 932             {
 933                 logf(LOG_DEBUG, "Record > maxrcdsz");
 934                 reclist.records[reclist.num_records] =
 935                     surrogatediagrec(a->proto, fres->basename, 17, 0);
 936                 reclist.num_records++;
 937                 *next = fres->last_in_set ? 0 : recno + 1;
 938                 continue;
 939             }
 940         }
 941         if (!(thisrec = odr_malloc(a->encode, sizeof(*thisrec))))
 942             return 0;
 943         if (!(thisrec->databaseName = odr_malloc(a->encode,
 944             strlen(fres->basename) + 1)))
 945             return 0;
 946         strcpy(thisrec->databaseName, fres->basename);
 947         thisrec->which = Z_NamePlusRecord_databaseRecord;
 948         if (!(thisrec->u.databaseRecord = thisext = odr_malloc(a->encode,
 949             sizeof(Z_DatabaseRecord))))
 950             return 0;
 951         recform.proto = a->proto;
 952         recform.oclass = CLASS_RECSYN;
 953         recform.value = fres->format;
 954         thisext->direct_reference = odr_oiddup(a->encode,
 955             oid_getoidbyent(&recform));
 956         thisext->indirect_reference = 0;
 957         thisext->descriptor = 0;
 958         if (fres->len < 0) /* Structured data */
 959         {
 960             switch (fres->format)
 961             {
 962                 case VAL_SUTRS: thisext->which = Z_External_sutrs; break;
 963                 case VAL_GRS1: thisext->which = Z_External_grs1; break;
 964                 case VAL_EXPLAIN: thisext->which = Z_External_explainRecord;
 965                     break;
 966
 967                 default:
 968                     logf(LOG_FATAL, "Unknown structured format from backend.");
 969                     return 0;
 970             }
 971
 972             /*
 973              * We cheat on the pointers here. Obviously, the record field
 974              * of the backend-fetch structure should have been a union for
 975              * correctness, but we're stuck with this for backwards
 976              * compatibility.
 977              */
 978             thisext->u.grs1 = (Z_GenericRecord*) fres->record;
 979         }
 980         else if (fres->format == VAL_SUTRS) /* SUTRS is a single-ASN.1-type */
 981         {
 982             Odr_oct *sutrs = odr_malloc(a->encode, sizeof(*sutrs));
 983
 984             thisext->which = Z_External_sutrs;
 985             thisext->u.sutrs = sutrs;
 986             sutrs->buf = odr_malloc(a->encode, fres->len);
 987             sutrs->len = sutrs->size = fres->len;
 988             memcpy(sutrs->buf, fres->record, fres->len);
 989         }
 990         else /* octet-aligned record. */
 991         {
 992             thisext->which = Z_External_octet;
 993             if (!(thisext->u.octet_aligned = odr_malloc(a->encode,
 994                 sizeof(Odr_oct))))
 995                 return 0;
 996             if (!(thisext->u.octet_aligned->buf = odr_malloc(a->encode,
 997                 fres->len)))
 998                 return 0;
 999             memcpy(thisext->u.octet_aligned->buf, fres->record, fres->len);
1000             thisext->u.octet_aligned->len = thisext->u.octet_aligned->size =
1001                 fres->len;
1002         }
1003         reclist.records[reclist.num_records] = thisrec;
1004         reclist.num_records++;
1005         *next = fres->last_in_set ? 0 : recno + 1;
1006     }
1007     *num = reclist.num_records;
1008     return &records;
1009 }
1010
1011 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
1012     int *fd)
1013 {
1014     Z_SearchRequest *req = reqb->request->u.searchRequest;
1015     bend_searchrequest bsrq;
1016     bend_searchresult *bsrt;
1017
1018     logf(LOG_LOG, "Got SearchRequest.");
1019
1020     bsrq.setname = req->resultSetName;
1021     bsrq.replace_set = *req->replaceIndicator;
1022     bsrq.num_bases = req->num_databaseNames;
1023     bsrq.basenames = req->databaseNames;
1024     bsrq.query = req->query;
1025
1026     if (!(bsrt = bend_search(assoc->backend, &bsrq, fd)))
1027         return 0;
1028     return response_searchRequest(assoc, reqb, bsrt, fd);
1029 }
1030
1031 bend_searchresult *bend_searchresponse(void *handle) {return 0;}
1032
1033 /*
1034  * Prepare a searchresponse based on the backend results. We probably want
1035  * to look at making the fetching of records nonblocking as well, but
1036  * so far, we'll keep things simple.
1037  * If bsrt is null, that means we're called in response to a communications
1038  * event, and we'll have to get the response for ourselves.
1039  */
1040 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
1041     bend_searchresult *bsrt, int *fd)
1042 {
1043     Z_SearchRequest *req = reqb->request->u.searchRequest;
1044     static Z_APDU apdu;
1045     static Z_SearchResponse resp;
1046     static int nulint = 0;
1047     static bool_t sr = 1;
1048     static int next = 0;
1049     static int none = Z_RES_NONE;
1050
1051     apdu.which = Z_APDU_searchResponse;
1052     apdu.u.searchResponse = &resp;
1053     resp.referenceId = req->referenceId;
1054 #ifdef Z_95
1055     resp.additionalSearchInfo = 0;
1056     resp.otherInfo = 0;
1057 #endif
1058     *fd = -1;
1059     if (!bsrt && !(bsrt = bend_searchresponse(assoc->backend)))
1060     {
1061         logf(LOG_FATAL, "Bad result from backend");
1062         return 0;
1063     }
1064     else if (bsrt->errcode)
1065     {
1066         resp.records = diagrec(assoc->proto, bsrt->errcode,
1067             bsrt->errstring);
1068         resp.resultCount = &nulint;
1069         resp.numberOfRecordsReturned = &nulint;
1070         resp.nextResultSetPosition = &nulint;
1071         resp.searchStatus = &nulint;
1072         resp.resultSetStatus = &none;
1073         resp.presentStatus = 0;
1074     }
1075     else
1076     {
1077         static int toget;
1078         Z_RecordComposition comp, *compp = 0;
1079         static int presst = 0;
1080
1081         resp.records = 0;
1082         resp.resultCount = &bsrt->hits;
1083
1084         comp.which = Z_RecordComp_simple;
1085         /* how many records does the user agent want, then? */
1086         if (bsrt->hits <= *req->smallSetUpperBound)
1087         {
1088             toget = bsrt->hits;
1089             if ((comp.u.simple = req->smallSetElementSetNames))
1090                 compp = &comp;
1091         }
1092         else if (bsrt->hits < *req->largeSetLowerBound)
1093         {
1094             toget = *req->mediumSetPresentNumber;
1095             if (toget > bsrt->hits)
1096                 toget = bsrt->hits;
1097             if ((comp.u.simple = req->mediumSetElementSetNames))
1098                 compp = &comp;
1099         }
1100         else
1101             toget = 0;
1102
1103         if (toget && !resp.records)
1104         {
1105             oident *prefformat;
1106             oid_value form;
1107
1108             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
1109                 prefformat->oclass != CLASS_RECSYN)
1110                 form = VAL_NONE;
1111             else
1112                 form = prefformat->value;
1113             resp.records = pack_records(assoc, req->resultSetName, 1,
1114                 &toget, compp, &next, &presst, form);
1115             if (!resp.records)
1116                 return 0;
1117             resp.numberOfRecordsReturned = &toget;
1118             resp.nextResultSetPosition = &next;
1119             resp.searchStatus = &sr;
1120             resp.resultSetStatus = 0;
1121             resp.presentStatus = &presst;
1122         }
1123         else
1124         {
1125             if (*resp.resultCount)
1126                 next = 1;
1127             resp.numberOfRecordsReturned = &nulint;
1128             resp.nextResultSetPosition = &next;
1129             resp.searchStatus = &sr;
1130             resp.resultSetStatus = 0;
1131             resp.presentStatus = 0;
1132         }
1133     }
1134     return &apdu;
1135 }
1136
1137 /*
1138  * Maybe we got a little over-friendly when we designed bend_fetch to
1139  * get only one record at a time. Some backends can optimise multiple-record
1140  * fetches, and at any rate, there is some overhead involved in
1141  * all that selecting and hopping around. Problem is, of course, that the
1142  * frontend can't know ahead of time how many records it'll need to
1143  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
1144  * is downright lousy as a bulk data transfer protocol.
1145  *
1146  * To start with, we'll do the fetching of records from the backend
1147  * in one operation: To save some trips in and out of the event-handler,
1148  * and to simplify the interface to pack_records. At any rate, asynch
1149  * operation is more fun in operations that have an unpredictable execution
1150  * speed - which is normally more true for search than for present.
1151  */
1152 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
1153     int *fd)
1154 {
1155     Z_PresentRequest *req = reqb->request->u.presentRequest;
1156     static Z_APDU apdu;
1157     static Z_PresentResponse resp;
1158     static int presst, next, num;
1159     oident *prefformat;
1160     oid_value form;
1161
1162
1163     logf(LOG_LOG, "Got PresentRequest.");
1164     apdu.which = Z_APDU_presentResponse;
1165     apdu.u.presentResponse = &resp;
1166     resp.referenceId = req->referenceId;
1167 #ifdef Z_95
1168     resp.otherInfo = 0;
1169 #endif
1170
1171     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
1172         prefformat->oclass != CLASS_RECSYN)
1173         form = VAL_NONE;
1174     else
1175         form = prefformat->value;
1176     num = *req->numberOfRecordsRequested;
1177     resp.records = pack_records(assoc, req->resultSetId,
1178         *req->resultSetStartPoint, &num, req->recordComposition, &next,
1179         &presst, form);
1180     if (!resp.records)
1181         return 0;
1182     resp.numberOfRecordsReturned = &num;
1183     resp.presentStatus = &presst;
1184     resp.nextResultSetPosition = &next;
1185
1186     return &apdu;
1187 }
1188
1189 /*
1190  * Scan was implemented rather in a hurry, and with support for only the basic
1191  * elements of the service in the backend API. Suggestions are welcome.
1192  */
1193 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
1194 {
1195     Z_ScanRequest *req = reqb->request->u.scanRequest;
1196     static Z_APDU apdu;
1197     static Z_ScanResponse res;
1198     static int scanStatus = Z_Scan_failure;
1199     static int numberOfEntriesReturned = 0;
1200     oident *attent;
1201     static Z_ListEntries ents;
1202 #define SCAN_MAX_ENTRIES 200
1203     static Z_Entry *tab[SCAN_MAX_ENTRIES];
1204     bend_scanrequest srq;
1205     bend_scanresult *srs;
1206     oident *attset;
1207
1208     logf(LOG_LOG, "Got scanrequest");
1209     apdu.which = Z_APDU_scanResponse;
1210     apdu.u.scanResponse = &res;
1211     res.referenceId = req->referenceId;
1212     res.stepSize = 0;
1213     res.scanStatus = &scanStatus;
1214     res.numberOfEntriesReturned = &numberOfEntriesReturned;
1215     res.positionOfTerm = 0;
1216     res.entries = &ents;
1217     ents.which = Z_ListEntries_nonSurrogateDiagnostics;
1218     res.attributeSet = 0;
1219 #ifdef Z_95
1220     res.otherInfo = 0;
1221 #endif
1222
1223     if (req->attributeSet && (!(attent = oid_getentbyoid(req->attributeSet)) ||
1224         attent->oclass != CLASS_ATTSET || attent->value != VAL_BIB1))
1225         ents.u.nonSurrogateDiagnostics = diagrecs(assoc->proto, 121, 0);
1226     else if (req->stepSize && *req->stepSize > 0)
1227         ents.u.nonSurrogateDiagnostics = diagrecs(assoc->proto, 205, 0);
1228     else
1229     {
1230         if (req->termListAndStartPoint->term->which == Z_Term_general)
1231             logf(LOG_DEBUG, " term: '%.*s'",
1232                 req->termListAndStartPoint->term->u.general->len,
1233                 req->termListAndStartPoint->term->u.general->buf);
1234         srq.num_bases = req->num_databaseNames;
1235         srq.basenames = req->databaseNames;
1236         srq.num_entries = *req->numberOfTermsRequested;
1237         srq.term = req->termListAndStartPoint;
1238         if (!(attset = oid_getentbyoid(req->attributeSet)) ||
1239             attset->oclass != CLASS_RECSYN)
1240             srq.attributeset = VAL_NONE;
1241         else
1242             srq.attributeset = attset->value;
1243         srq.term_position = req->preferredPositionInResponse ?
1244             *req->preferredPositionInResponse : 1;
1245         if (!(srs = bend_scan(assoc->backend, &srq, 0)))
1246             ents.u.nonSurrogateDiagnostics = diagrecs(assoc->proto, 2, 0);
1247         else if (srs->errcode)
1248             ents.u.nonSurrogateDiagnostics = diagrecs(assoc->proto,
1249                 srs->errcode, srs->errstring);
1250         else
1251         {
1252             int i;
1253             static Z_Entries list;
1254
1255             if (srs->status == BEND_SCAN_PARTIAL)
1256                 scanStatus = Z_Scan_partial_5;
1257             else
1258                 scanStatus = Z_Scan_success;
1259             ents.which = Z_ListEntries_entries;
1260             ents.u.entries = &list;
1261             list.entries = tab;
1262             for (i = 0; i < srs->num_entries; i++)
1263             {
1264                 Z_Entry *e;
1265                 Z_TermInfo *t;
1266                 Odr_oct *o;
1267
1268                 if (i >= SCAN_MAX_ENTRIES)
1269                 {
1270                     scanStatus = Z_Scan_partial_4;
1271                     break;
1272                 }
1273                 list.entries[i] = e = odr_malloc(assoc->encode, sizeof(*e));
1274                 e->which = Z_Entry_termInfo;
1275                 e->u.termInfo = t = odr_malloc(assoc->encode, sizeof(*t));
1276                 t->suggestedAttributes = 0;
1277                 t->displayTerm = 0;
1278                 t->alternativeTerm = 0;
1279                 t->byAttributes = 0;
1280                 t->otherTermInfo = 0;
1281                 t->globalOccurrences = &srs->entries[i].occurrences;
1282                 t->term = odr_malloc(assoc->encode, sizeof(*t->term));
1283                 t->term->which = Z_Term_general;
1284                 t->term->u.general = o = odr_malloc(assoc->encode,
1285                     sizeof(Odr_oct));
1286                 o->buf = odr_malloc(assoc->encode, o->len = o->size =
1287                     strlen(srs->entries[i].term));
1288                 memcpy(o->buf, srs->entries[i].term, o->len);
1289                 logf(LOG_DEBUG, "  term #%d: '%s' (%d)", i,
1290                     srs->entries[i].term, srs->entries[i].occurrences);
1291             }
1292             list.num_entries = i;
1293             res.numberOfEntriesReturned = &list.num_entries;
1294             res.positionOfTerm = &srs->term_position;
1295         }
1296     }
1297
1298     return &apdu;
1299 }
1300
1301 static void process_close(association *assoc, request *reqb)
1302 {
1303     Z_Close *req = reqb->request->u.close;
1304     static char *reasons[] =
1305     {
1306         "finished",
1307         "shutdown",
1308         "systemProblem",
1309         "costLimit",
1310         "resources",
1311         "securityViolation",
1312         "protocolError",
1313         "lackOfActivity",
1314         "peerAbort",
1315         "unspecified"
1316     };
1317
1318     logf(LOG_LOG, "Got close, reason %s, message %s",
1319         reasons[*req->closeReason], req->diagnosticInformation ?
1320         req->diagnosticInformation : "NULL");
1321     if (assoc->version < 3) /* to make do_force respond with close */
1322         assoc->version = 3;
1323     do_close(assoc, Z_Close_finished, "Association terminated by client");
1324 }