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