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 1.66  1997-09-05 15:26:44  adam
   8  * Added ODR encode in search and scen bend request structures.
   9  * Fixed a few enums that caused trouble with C++.
  10  *
  11  * Revision 1.65  1997/09/01 08:53:01  adam
  12  * New windows NT/95 port using MSV5.0. The test server 'ztest' was
  13  * moved a separate directory. MSV5.0 project server.dsp created.
  14  * As an option, the server can now operate as an NT service.
  15  *
  16  * Revision 1.64  1997/04/30 08:52:11  quinn
  17  * Null
  18  *
  19  * Revision 1.63  1996/10/11  11:57:26  quinn
  20  * Smallish
  21  *
  22  * Revision 1.62  1996/07/06  19:58:35  quinn
  23  * System headerfiles gathered in yconfig
  24  *
  25  * Revision 1.61  1996/06/10  08:56:16  quinn
  26  * Work on Summary.
  27  *
  28  * Revision 1.60  1996/05/30  11:03:10  quinn
  29  * Fixed NextresultSetPosition bug fixed.
  30  *
  31  * Revision 1.59  1996/05/14  09:26:46  quinn
  32  * Added attribute set to scan backend
  33  *
  34  * Revision 1.58  1996/02/20  12:53:04  quinn
  35  * Chanes to SCAN
  36  *
  37  * Revision 1.57  1996/01/02  08:57:47  quinn
  38  * Changed enums in the ASN.1 .h files to #defines. Changed oident.class to oclass
  39  *
  40  * Revision 1.56  1995/12/14  11:09:57  quinn
  41  * Work on Explain
  42  *
  43  * Revision 1.55  1995/11/08  17:41:37  quinn
  44  * Smallish.
  45  *
  46  * Revision 1.54  1995/11/08  15:11:29  quinn
  47  * Log of close transmit.
  48  *
  49  * Revision 1.53  1995/11/01  13:54:58  quinn
  50  * Minor adjustments
  51  *
  52  * Revision 1.52  1995/11/01  12:19:13  quinn
  53  * Second attempt to fix same bug.
  54  *
  55  * Revision 1.50  1995/10/25  16:58:32  quinn
  56  * Simple.
  57  *
  58  * Revision 1.49  1995/10/16  13:51:53  quinn
  59  * Changes to provide Especs to the backend.
  60  *
  61  * Revision 1.48  1995/10/06  08:51:20  quinn
  62  * Added Write-buffer.
  63  *
  64  * Revision 1.47  1995/08/29  14:24:16  quinn
  65  * Added second half of close-handshake
  66  *
  67  * Revision 1.46  1995/08/29  11:17:58  quinn
  68  * Added code to receive close
  69  *
  70  * Revision 1.45  1995/08/21  09:11:00  quinn
  71  * Smallish fixes to suppport new formats.
  72  *
  73  * Revision 1.44  1995/08/17  12:45:25  quinn
  74  * Fixed minor problems with GRS-1. Added support in c&s.
  75  *
  76  * Revision 1.43  1995/08/15  12:00:31  quinn
  77  * Updated External
  78  *
  79  * Revision 1.42  1995/08/15  11:16:50  quinn
  80  *
  81  * Revision 1.41  1995/08/02  10:23:06  quinn
  82  * Smallish
  83  *
  84  * Revision 1.40  1995/07/31  14:34:26  quinn
  85  * Fixed bug in process_searchResponse (numberOfRecordsReturned).
  86  *
  87  * Revision 1.39  1995/06/27  13:21:00  quinn
  88  * SUTRS support
  89  *
  90  * Revision 1.38  1995/06/19  12:39:11  quinn
  91  * Fixed bug in timeout code. Added BER dumper.
  92  *
  93  * Revision 1.37  1995/06/16  13:16:14  quinn
  94  * Fixed Defaultdiagformat.
  95  *
  96  * Revision 1.36  1995/06/16  10:31:36  quinn
  97  * Added session timeout.
  98  *
  99  * Revision 1.35  1995/06/15  07:45:14  quinn
 100  * Moving to v3.
 101  *
 102  * Revision 1.34  1995/06/14  15:26:46  quinn
 103  * *** empty log message ***
 104  *
 105  * Revision 1.33  1995/06/06  14:57:05  quinn
 106  * Better diagnostics.
 107  *
 108  * Revision 1.32  1995/06/06  08:41:44  quinn
 109  * Better diagnostics.
 110  *
 111  * Revision 1.31  1995/06/06  08:15:37  quinn
 112  * Cosmetic.
 113  *
 114  * Revision 1.30  1995/06/05  10:53:32  quinn
 115  * Added a better SCAN.
 116  *
 117  * Revision 1.29  1995/06/01  11:25:03  quinn
 118  * Smallish.
 119  *
 120  * Revision 1.28  1995/06/01  11:21:01  quinn
 121  * Attempting to fix a bug in pack-records. replaced break with continue
 122  * for large records, according to standard.
 123  *
 124  * Revision 1.27  1995/05/29  08:12:06  quinn
 125  * Moved oid to util
 126  *
 127  * Revision 1.26  1995/05/18  13:02:12  quinn
 128  * Smallish.
 129  *
 130  * Revision 1.25  1995/05/17  08:42:26  quinn
 131  * Transfer auth info to backend. Allow backend to reject init gracefully.
 132  *
 133  * Revision 1.24  1995/05/16  08:51:04  quinn
 134  * License, documentation, and memory fixes
 135  *
 136  * Revision 1.23  1995/05/15  13:25:10  quinn
 137  * Fixed memory bug.
 138  *
 139  * Revision 1.22  1995/05/15  11:56:39  quinn
 140  * Asynchronous facilities. Restructuring of seshigh code.
 141  *
 142  * Revision 1.21  1995/05/02  08:53:19  quinn
 143  * Trying in vain to fix comm with ISODE
 144  *
 145  * Revision 1.20  1995/04/20  15:13:00  quinn
 146  * Cosmetic
 147  *
 148  * Revision 1.19  1995/04/18  08:15:34  quinn
 149  * Added dynamic memory allocation on encoding (whew). Code is now somewhat
 150  * neater. We'll make the same change for decoding one day.
 151  *
 152  * Revision 1.18  1995/04/17  11:28:25  quinn
 153  * Smallish
 154  *
 155  * Revision 1.17  1995/04/10  10:23:36  quinn
 156  * Some work to add scan and other things.
 157  *
 158  * Revision 1.16  1995/03/31  09:18:55  quinn
 159  * Added logging.
 160  *
 161  * Revision 1.15  1995/03/30  14:03:23  quinn
 162  * Added RFC1006 as separate library
 163  *
 164  * Revision 1.14  1995/03/30  12:18:17  quinn
 165  * Fixed bug.
 166  *
 167  * Revision 1.13  1995/03/30  09:09:24  quinn
 168  * Added state-handle and some support for asynchronous activities.
 169  *
 170  * Revision 1.12  1995/03/29  15:40:16  quinn
 171  * Ongoing work. Statserv is now dynamic by default
 172  *
 173  * Revision 1.11  1995/03/28  09:16:21  quinn
 174  * Added record packing to the search request
 175  *
 176  * Revision 1.10  1995/03/27  08:34:24  quinn
 177  * Added dynamic server functionality.
 178  * Released bindings to session.c (is now redundant)
 179  *
 180  * Revision 1.9  1995/03/22  15:01:26  quinn
 181  * Adjusting record packing.
 182  *
 183  * Revision 1.8  1995/03/22  10:13:21  quinn
 184  * Working on record packer
 185  *
 186  * Revision 1.7  1995/03/21  15:53:31  quinn
 187  * Little changes.
 188  *
 189  * Revision 1.6  1995/03/21  12:30:09  quinn
 190  * Beginning to add support for record packing.
 191  *
 192  * Revision 1.5  1995/03/17  10:44:13  quinn
 193  * Added catch of null-string in makediagrec
 194  *
 195  * Revision 1.4  1995/03/17  10:18:08  quinn
 196  * Added memory management.
 197  *
 198  * Revision 1.3  1995/03/16  17:42:39  quinn
 199  * Little changes
 200  *
 201  * Revision 1.2  1995/03/16  13:29:01  quinn
 202  * Partitioned server.
 203  *
 204  * Revision 1.1  1995/03/15  16:02:10  quinn
 205  * Modded session.c to seshigh.c
 206  *
 207  */
 208
 209 /*
 210  * Frontend server logic.
 211  *
 212  * This code receives incoming APDUs, and handles client requests by means
 213  * of the backend API.
 214  *
 215  * Some of the code is getting quite involved, compared to simpler servers -
 216  * primarily because it is asynchronous both in the communication with
 217  * the user and the backend. We think the complexity will pay off in
 218  * the form of greater flexibility when more asynchronous facilities
 219  * are implemented.
 220  *
 221  * Memory management has become somewhat involved. In the simple case, where
 222  * only one PDU is pending at a time, it will simply reuse the same memory,
 223  * once it has found its working size. When we enable multiple concurrent
 224  * operations, perhaps even with multiple parallel calls to the backend, it
 225  * will maintain a pool of buffers for encoding and decoding, trying to
 226  * minimize memory allocation/deallocation during normal operation.
 227  *
 228  * TODOs include (and will be done in order of public interest):
 229  *
 230  * Support for EXPLAIN - provide simple meta-database system.
 231  * Support for access control.
 232  * Support for resource control.
 233  * Support for extended services - primarily Item Order.
 234  * Rest of Z39.50-1994
 235  *
 236  */
 237
 238 #include <yconfig.h>
 239 #include <stdlib.h>
 240 #include <stdio.h>
 241 #ifdef WINDOWS
 242 #include <process.h>
 243 #else
 244 #include <unistd.h>
 245 #endif
 246 #include <assert.h>
 247
 248 #include <xmalloc.h>
 249 #include <comstack.h>
 250 #include "eventl.h"
 251 #include "session.h"
 252 #include <proto.h>
 253 #include <oid.h>
 254 #include <log.h>
 255 #include <statserv.h>
 256
 257 #include <backend.h>
 258
 259 static int process_request(association *assoc);
 260 void backend_response(IOCHAN i, int event);
 261 static int process_response(association *assoc, request *req, Z_APDU *res);
 262 static Z_APDU *process_initRequest(association *assoc, request *reqb);
 263 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
 264     int *fd);
 265 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
 266     bend_searchresult *bsrt, int *fd);
 267 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
 268     int *fd);
 269 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
 270 static void process_close(association *assoc, request *reqb);
 271
 272 static FILE *apduf = 0; /* for use in static mode */
 273 static statserv_options_block *control_block = 0;
 274
 275 /*
 276  * Create and initialize a new association-handle.
 277  *  channel  : iochannel for the current line.
 278  *  link     : communications channel.
 279  * Returns: 0 or a new association handle.
 280  */
 281 association *create_association(IOCHAN channel, COMSTACK link)
 282 {
 283     association *new;
 284
 285     if (!control_block)
 286         control_block = statserv_getcontrol();
 287     if (!(new = xmalloc(sizeof(*new))))
 288         return 0;
 289     new->client_chan = channel;
 290     new->client_link = link;
 291     if (!(new->decode = odr_createmem(ODR_DECODE)) ||
 292         !(new->encode = odr_createmem(ODR_ENCODE)))
 293         return 0;
 294     if (*control_block->apdufile)
 295     {
 296         char filename[256];
 297         FILE *f;
 298
 299         strcpy(filename, control_block->apdufile);
 300         if (!(new->print = odr_createmem(ODR_PRINT)))
 301             return 0;
 302         if (*control_block->apdufile != '-')
 303         {
 304             strcpy(filename, control_block->apdufile);
 305             if (!control_block->dynamic)
 306             {
 307                 if (!apduf)
 308                 {
 309                     if (!(apduf = fopen(filename, "w")))
 310                     {
 311                         logf(LOG_WARN|LOG_ERRNO, "%s", filename);
 312                         return 0;
 313                     }
 314                     setvbuf(apduf, 0, _IONBF, 0);
 315                 }
 316                 f = apduf;
 317             }
 318             else
 319             {
 320                 sprintf(filename + strlen(filename), ".%d", getpid());
 321                 if (!(f = fopen(filename, "w")))
 322                 {
 323                     logf(LOG_WARN|LOG_ERRNO, "%s", filename);
 324                     return 0;
 325                 }
 326                 setvbuf(f, 0, _IONBF, 0);
 327             }
 328             odr_setprint(new->print, f);
 329         }
 330     }
 331     else
 332         new->print = 0;
 333     new->input_buffer = 0;
 334     new->input_buffer_len = 0;
 335     new->backend = 0;
 336     new->state = ASSOC_NEW;
 337     request_initq(&new->incoming);
 338     request_initq(&new->outgoing);
 339     new->proto = cs_getproto(link);
 340     return new;
 341 }
 342
 343 /*
 344  * Free association and release resources.
 345  */
 346 void destroy_association(association *h)
 347 {
 348     odr_destroy(h->decode);
 349     odr_destroy(h->encode);
 350     if (h->print)
 351         odr_destroy(h->print);
 352     if (h->input_buffer)
 353     xfree(h->input_buffer);
 354     if (h->backend)
 355         bend_close(h->backend);
 356     while (request_deq(&h->incoming));
 357     while (request_deq(&h->outgoing));
 358     request_delq(&h->incoming);
 359     request_delq(&h->outgoing);
 360     xfree(h);
 361 }
 362
 363 static void do_close(association *a, int reason, char *message)
 364 {
 365     Z_APDU apdu;
 366     Z_Close *cls = zget_Close(a->encode);
 367     request *req = request_get(&a->outgoing);
 368
 369     /* Purge request queue */
 370     while (request_deq(&a->incoming));
 371     while (request_deq(&a->outgoing));
 372     if (a->version >= 3)
 373     {
 374         logf(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
 375             reason, message ? message : "none");
 376         apdu.which = Z_APDU_close;
 377         apdu.u.close = cls;
 378         *cls->closeReason = reason;
 379         cls->diagnosticInformation = message;
 380         process_response(a, req, &apdu);
 381         iochan_settimeout(a->client_chan, 60);
 382     }
 383     else
 384     {
 385         logf(LOG_DEBUG, "v2 client. No Close PDU");
 386         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 387     }
 388     a->state = ASSOC_DEAD;
 389 }
 390
 391 /*
 392  * This is where PDUs from the client are read and the further
 393  * processing is initiated. Flow of control moves down through the
 394  * various process_* functions below, until the encoded result comes back up
 395  * to the output handler in here.
 396  *
 397  *  h     : the I/O channel that has an outstanding event.
 398  *  event : the current outstanding event.
 399  */
 400 void ir_session(IOCHAN h, int event)
 401 {
 402     int res;
 403     association *assoc = iochan_getdata(h);
 404     COMSTACK conn = assoc->client_link;
 405     request *req;
 406
 407     assert(h && conn && assoc);
 408     if (event == EVENT_TIMEOUT)
 409     {
 410         if (assoc->state != ASSOC_UP)
 411         {
 412             logf(LOG_LOG, "Final timeout - closing connection.");
 413             cs_close(conn);
 414             destroy_association(assoc);
 415             iochan_destroy(h);
 416         }
 417         else
 418         {
 419             logf(LOG_LOG, "Session idle too long. Sending close.");
 420             do_close(assoc, Z_Close_lackOfActivity, 0);
 421         }
 422         return;
 423     }
 424     if (event & EVENT_INPUT || event & EVENT_WORK) /* input */
 425     {
 426         if (event & EVENT_INPUT)
 427         {
 428             logf(LOG_DEBUG, "ir_session (input)");
 429             assert(assoc && conn);
 430             /* We aren't speaking to this fellow */
 431             if (assoc->state == ASSOC_DEAD)
 432             {
 433                 logf(LOG_LOG, "Closed connection after reject");
 434                 cs_close(conn);
 435                 destroy_association(assoc);
 436                 iochan_destroy(h);
 437                 return;
 438             }
 439             if ((res = cs_get(conn, &assoc->input_buffer,
 440                 &assoc->input_buffer_len)) <= 0)
 441             {
 442                 logf(LOG_LOG, "Connection closed by client");
 443                 cs_close(conn);
 444                 destroy_association(assoc);
 445                 iochan_destroy(h);
 446                 return;
 447             }
 448             else if (res == 1) /* incomplete read - wait for more  */
 449                 return;
 450             if (cs_more(conn)) /* more stuff - call us again later, please */
 451                 iochan_setevent(h, EVENT_INPUT);
 452
 453             /* we got a complete PDU. Let's decode it */
 454             logf(LOG_DEBUG, "Got PDU, %d bytes", res);
 455             req = request_get(&assoc->incoming); /* get a new request structure */
 456             odr_reset(assoc->decode);
 457             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 458             if (!z_APDU(assoc->decode, &req->request, 0))
 459             {
 460                 logf(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ",
 461                     odr_errmsg(odr_geterror(assoc->decode)),
 462                     odr_offset(assoc->decode));
 463                 logf(LOG_LOG, "PDU dump:");
 464                 odr_dumpBER(log_file(), assoc->input_buffer, res);
 465                 do_close(assoc, Z_Close_protocolError, "Malformed package");
 466                 return;
 467             }
 468             req->request_mem = odr_extract_mem(assoc->decode);
 469             if (assoc->print && !z_APDU(assoc->print, &req->request, 0))
 470             {
 471                 logf(LOG_WARN, "ODR print error: %s",
 472                     odr_errmsg(odr_geterror(assoc->print)));
 473                 odr_reset(assoc->print);
 474             }
 475             request_enq(&assoc->incoming, req);
 476         }
 477
 478         /* can we do something yet? */
 479         req = request_head(&assoc->incoming);
 480         if (req->state == REQUEST_IDLE)
 481             if (process_request(assoc) < 0)
 482                 do_close(assoc, Z_Close_systemProblem, "Unknown error");
 483     }
 484     if (event & EVENT_OUTPUT)
 485     {
 486         request *req = request_head(&assoc->outgoing);
 487
 488         logf(LOG_DEBUG, "ir_session (output)");
 489         req->state = REQUEST_PENDING;
 490         switch (res = cs_put(conn, req->response, req->len_response))
 491         {
 492             case -1:
 493                 logf(LOG_LOG, "Connection closed by client");
 494                 cs_close(conn);
 495                 destroy_association(assoc);
 496                 iochan_destroy(h);
 497                 break;
 498             case 0: /* all sent - release the request structure */
 499                 logf(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 500                 nmem_destroy(req->request_mem);
 501                 request_deq(&assoc->outgoing);
 502                 request_release(req);
 503                 if (!request_head(&assoc->outgoing))
 504                     iochan_clearflag(h, EVENT_OUTPUT);
 505                 break;
 506             /* value of 1 -- partial send -- is simply ignored */
 507         }
 508     }
 509     if (event & EVENT_EXCEPT)
 510     {
 511         logf(LOG_DEBUG, "ir_session (exception)");
 512         cs_close(conn);
 513         destroy_association(assoc);
 514         iochan_destroy(h);
 515     }
 516 }
 517
 518 /*
 519  * Initiate request processing.
 520  */
 521 static int process_request(association *assoc)
 522 {
 523     request *req = request_head(&assoc->incoming);
 524     int fd = -1;
 525     Z_APDU *res;
 526
 527     logf(LOG_DEBUG, "process_request");
 528     assert(req && req->state == REQUEST_IDLE);
 529     switch (req->request->which)
 530     {
 531         case Z_APDU_initRequest:
 532             res = process_initRequest(assoc, req); break;
 533         case Z_APDU_searchRequest:
 534             res = process_searchRequest(assoc, req, &fd); break;
 535         case Z_APDU_presentRequest:
 536             res = process_presentRequest(assoc, req, &fd); break;
 537         case Z_APDU_scanRequest:
 538             res = process_scanRequest(assoc, req, &fd); break;
 539         case Z_APDU_close:
 540             process_close(assoc, req); return 0;
 541         default:
 542             logf(LOG_WARN, "Bad APDU received");
 543             return -1;
 544     }
 545     if (res)
 546     {
 547         logf(LOG_DEBUG, "  result immediately available");
 548         return process_response(assoc, req, res);
 549     }
 550     else if (fd < 0)
 551     {
 552         logf(LOG_WARN, "   bad result");
 553         return -1;
 554     }
 555     else /* no result yet - one will be provided later */
 556     {
 557         IOCHAN chan;
 558
 559         /* Set up an I/O handler for the fd supplied by the backend */
 560
 561         logf(LOG_DEBUG, "   establishing handler for result");
 562         req->state = REQUEST_PENDING;
 563         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
 564             abort();
 565         iochan_setdata(chan, assoc);
 566         return 0;
 567     }
 568 }
 569
 570 /*
 571  * Handle message from the backend.
 572  */
 573 void backend_response(IOCHAN i, int event)
 574 {
 575     association *assoc = iochan_getdata(i);
 576     request *req = request_head(&assoc->incoming);
 577     Z_APDU *res;
 578     int fd;
 579
 580     logf(LOG_DEBUG, "backend_response");
 581     assert(assoc && req && req->state != REQUEST_IDLE);
 582     /* determine what it is we're waiting for */
 583     switch (req->request->which)
 584     {
 585         case Z_APDU_searchRequest:
 586             res = response_searchRequest(assoc, req, 0, &fd); break;
 587 #if 0
 588         case Z_APDU_presentRequest:
 589             res = response_presentRequest(assoc, req, 0, &fd); break;
 590         case Z_APDU_scanRequest:
 591             res = response_scanRequest(assoc, req, 0, &fd); break;
 592 #endif
 593         default:
 594             logf(LOG_WARN, "Serious programmer's lapse or bug");
 595             abort();
 596     }
 597     if ((res && process_response(assoc, req, res) < 0) || fd < 0)
 598     {
 599         logf(LOG_LOG, "Fatal error when talking to backend");
 600         do_close(assoc, Z_Close_systemProblem, 0);
 601         iochan_destroy(i);
 602         return;
 603     }
 604     else if (!res) /* no result yet - try again later */
 605     {
 606         logf(LOG_DEBUG, "   no result yet");
 607         iochan_setfd(i, fd); /* in case fd has changed */
 608     }
 609 }
 610
 611 /*
 612  * Encode response, and transfer the request structure to the outgoing queue.
 613  */
 614 static int process_response(association *assoc, request *req, Z_APDU *res)
 615 {
 616     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
 617     if (!z_APDU(assoc->encode, &res, 0))
 618     {
 619         logf(LOG_WARN, "ODR error when encoding response: %s",
 620             odr_errmsg(odr_geterror(assoc->decode)));
 621         odr_reset(assoc->encode);
 622         return -1;
 623     }
 624     req->response = odr_getbuf(assoc->encode, &req->len_response,
 625         &req->size_response);
 626     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
 627     odr_reset(assoc->encode);
 628     if (assoc->print && !z_APDU(assoc->print, &res, 0))
 629     {
 630         logf(LOG_WARN, "ODR print error: %s",
 631             odr_errmsg(odr_geterror(assoc->print)));
 632         odr_reset(assoc->print);
 633     }
 634     /* change this when we make the backend reentrant */
 635     if (req == request_head(&assoc->incoming))
 636     {
 637         req->state = REQUEST_IDLE;
 638         request_deq(&assoc->incoming);
 639     }
 640     request_enq(&assoc->outgoing, req);
 641     /* turn the work over to the ir_session handler */
 642     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
 643     /* Is there more work to be done? give that to the input handler too */
 644     if (request_head(&assoc->incoming))
 645         iochan_setevent(assoc->client_chan, EVENT_WORK);
 646     return 0;
 647 }
 648
 649 /*
 650  * Handle init request.
 651  * At the moment, we don't check the options
 652  * anywhere else in the code - we just try not to do anything that would
 653  * break a naive client. We'll toss 'em into the association block when
 654  * we need them there.
 655  */
 656 static Z_APDU *process_initRequest(association *assoc, request *reqb)
 657 {
 658     Z_InitRequest *req = reqb->request->u.initRequest;
 659     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
 660     Z_InitResponse *resp = apdu->u.initResponse;
 661     bend_initrequest binitreq;
 662     bend_initresult *binitres;
 663     char options[100];
 664
 665     logf(LOG_LOG, "Got initRequest");
 666     if (req->implementationId)
 667         logf(LOG_LOG, "Id:        %s", req->implementationId);
 668     if (req->implementationName)
 669         logf(LOG_LOG, "Name:      %s", req->implementationName);
 670     if (req->implementationVersion)
 671         logf(LOG_LOG, "Version:   %s", req->implementationVersion);
 672
 673     binitreq.configname = "default-config";
 674     binitreq.auth = req->idAuthentication;
 675     if (!(binitres = bend_init(&binitreq)))
 676     {
 677         logf(LOG_WARN, "Bad response from backend.");
 678         return 0;
 679     }
 680
 681     assoc->backend = binitres->handle;
 682     resp->referenceId = req->referenceId;
 683     *options = '\0';
 684     /* let's tell the client what we can do */
 685     if (ODR_MASK_GET(req->options, Z_Options_search))
 686     {
 687         ODR_MASK_SET(resp->options, Z_Options_search);
 688         strcat(options, "srch");
 689     }
 690     if (ODR_MASK_GET(req->options, Z_Options_present))
 691     {
 692         ODR_MASK_SET(resp->options, Z_Options_present);
 693         strcat(options, " prst");
 694     }
 695 #if 0
 696     if (ODR_MASK_GET(req->options, Z_Options_delSet))
 697     {
 698         ODR_MASK_SET(&options, Z_Options_delSet);
 699         strcat(options, " del");
 700     }
 701 #endif
 702     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
 703     {
 704         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
 705         strcat(options, " namedresults");
 706     }
 707     if (ODR_MASK_GET(req->options, Z_Options_scan))
 708     {
 709         ODR_MASK_SET(resp->options, Z_Options_scan);
 710         strcat(options, " scan");
 711     }
 712     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
 713     {
 714         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
 715         strcat(options, " concurop");
 716     }
 717
 718     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
 719     {
 720         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
 721         assoc->version = 2; /* 1 & 2 are equivalent */
 722     }
 723     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
 724     {
 725         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
 726         assoc->version = 2;
 727     }
 728     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
 729     {
 730         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
 731         assoc->version = 3;
 732     }
 733     logf(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
 734     assoc->maximumRecordSize = *req->maximumRecordSize;
 735     if (assoc->maximumRecordSize > control_block->maxrecordsize)
 736         assoc->maximumRecordSize = control_block->maxrecordsize;
 737     assoc->preferredMessageSize = *req->preferredMessageSize;
 738     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
 739         assoc->preferredMessageSize = assoc->maximumRecordSize;
 740     resp->preferredMessageSize = &assoc->preferredMessageSize;
 741     resp->maximumRecordSize = &assoc->maximumRecordSize;
 742     resp->implementationName = "Index Data/YAZ Generic Frontend Server";
 743     if (binitres->errcode)
 744     {
 745         logf(LOG_LOG, "Connection rejected by backend.");
 746         *resp->result = 0;
 747         assoc->state = ASSOC_DEAD;
 748     }
 749     else
 750         assoc->state = ASSOC_UP;
 751     return apdu;
 752 }
 753
 754 /*
 755  * These functions should be merged.
 756  */
 757
 758 /*
 759  * nonsurrogate diagnostic record.
 760  */
 761 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
 762 {
 763     Z_Records *rec = odr_malloc (assoc->encode, sizeof(*rec));
 764     oident bib1;
 765     int *err = odr_malloc (assoc->encode, sizeof(*err));
 766     Z_DiagRec *drec = odr_malloc (assoc->encode, sizeof(*drec));
 767     Z_DefaultDiagFormat *dr = odr_malloc (assoc->encode, sizeof(*dr));
 768
 769     bib1.proto = assoc->proto;
 770     bib1.oclass = CLASS_DIAGSET;
 771     bib1.value = VAL_BIB1;
 772
 773     logf(LOG_DEBUG, "Diagnostic: %d -- %s", error, addinfo ? addinfo :
 774         "NULL");
 775     *err = error;
 776     rec->which = Z_Records_NSD;
 777 #ifdef Z_95
 778     rec->u.nonSurrogateDiagnostic = drec;
 779     drec->which = Z_DiagRec_defaultFormat;
 780     drec->u.defaultFormat = dr;
 781 #else
 782     rec->u.nonSurrogateDiagnostic = dr;
 783 #endif
 784     dr->diagnosticSetId = oid_getoidbyent(&bib1);
 785     dr->condition = err;
 786     dr->which = Z_DiagForm_v2AddInfo;
 787     dr->addinfo = addinfo ? addinfo : "";
 788     return rec;
 789 }
 790
 791 /*
 792  * surrogate diagnostic.
 793  */
 794 static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname,
 795                                             int error, char *addinfo)
 796 {
 797     Z_NamePlusRecord *rec = odr_malloc (assoc->encode, sizeof(*rec));
 798     int *err = odr_malloc (assoc->encode, sizeof(*err));
 799     oident bib1;
 800     Z_DiagRec *drec = odr_malloc (assoc->encode, sizeof(*drec));
 801     Z_DefaultDiagFormat *dr = odr_malloc (assoc->encode, sizeof(*dr));
 802
 803     bib1.proto = assoc->proto;
 804     bib1.oclass = CLASS_DIAGSET;
 805     bib1.value = VAL_BIB1;
 806
 807     logf(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
 808     *err = error;
 809     rec->databaseName = dbname;
 810     rec->which = Z_NamePlusRecord_surrogateDiagnostic;
 811     rec->u.surrogateDiagnostic = drec;
 812     drec->which = Z_DiagRec_defaultFormat;
 813     drec->u.defaultFormat = dr;
 814     dr->diagnosticSetId = oid_getoidbyent(&bib1);
 815     dr->condition = err;
 816     dr->which = Z_DiagForm_v2AddInfo;
 817     dr->addinfo = addinfo ? addinfo : "";
 818     return rec;
 819 }
 820
 821 /*
 822  * multiple nonsurrogate diagnostics.
 823  */
 824 static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo)
 825 {
 826     Z_DiagRecs *recs = odr_malloc (assoc->encode, sizeof(*recs));
 827     int *err = odr_malloc (assoc->encode, sizeof(*err));
 828     oident bib1;
 829     Z_DiagRec **recp = odr_malloc (assoc->encode, sizeof(*recp));
 830     Z_DiagRec *drec = odr_malloc (assoc->encode, sizeof(*drec));
 831     Z_DefaultDiagFormat *rec = odr_malloc (assoc->encode, sizeof(*rec));
 832
 833     logf(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo);
 834     bib1.proto = assoc->proto;
 835     bib1.oclass = CLASS_DIAGSET;
 836     bib1.value = VAL_BIB1;
 837
 838     *err = error;
 839     recs->num_diagRecs = 1;
 840     recs->diagRecs = recp;
 841     recp[0] = drec;
 842     drec->which = Z_DiagRec_defaultFormat;
 843     drec->u.defaultFormat = rec;
 844
 845     rec->diagnosticSetId = oid_getoidbyent(&bib1);
 846     rec->condition = err;
 847     rec->which = Z_DiagForm_v2AddInfo;
 848     rec->addinfo = addinfo ? addinfo : "";
 849     return recs;
 850 }
 851
 852 static Z_Records *pack_records(association *a, char *setname, int start,
 853                                 int *num, Z_RecordComposition *comp,
 854                                 int *next, int *pres, oid_value format)
 855 {
 856     int recno, total_length = 0, toget = *num, dumped_records = 0;
 857     Z_Records *records = odr_malloc (a->encode, sizeof(*records));
 858     Z_NamePlusRecordList *reclist = odr_malloc (a->encode, sizeof(*reclist));
 859     Z_NamePlusRecord **list = odr_malloc (a->encode, sizeof(*list) * toget);
 860     oident recform;
 861
 862     records->which = Z_Records_DBOSD;
 863     records->u.databaseOrSurDiagnostics = reclist;
 864     reclist->num_records = 0;
 865     reclist->records = list;
 866     *pres = Z_PRES_SUCCESS;
 867     *num = 0;
 868     *next = 0;
 869
 870     logf(LOG_DEBUG, "Request to pack %d+%d", start, toget);
 871     logf(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
 872         a->maximumRecordSize);
 873     for (recno = start; reclist->num_records < toget; recno++)
 874     {
 875         bend_fetchrequest freq;
 876         bend_fetchresult *fres;
 877         Z_NamePlusRecord *thisrec;
 878         Z_DatabaseRecord *thisext;
 879         int this_length;
 880
 881         /*
 882          * we get the number of bytes allocated on the stream before any
 883          * allocation done by the backend - this should give us a reasonable
 884          * idea of the total size of the data so far.
 885          */
 886         total_length = odr_total(a->encode) - dumped_records;
 887         freq.setname = setname;
 888         freq.number = recno;
 889         freq.comp = comp;
 890         freq.format = format;
 891         freq.stream = a->encode;
 892         if (!(fres = bend_fetch(a->backend, &freq, 0)))
 893         {
 894             *pres = Z_PRES_FAILURE;
 895             return diagrec(a, 2, "Backend interface problem");
 896         }
 897         /* backend should be able to signal whether error is system-wide
 898            or only pertaining to current record */
 899         if (fres->errcode)
 900         {
 901             *pres = Z_PRES_FAILURE;
 902             return diagrec(a, fres->errcode, fres->errstring);
 903         }
 904         if (fres->len >= 0)
 905             this_length = fres->len;
 906         else
 907             this_length = odr_total(a->encode) - total_length;
 908         logf(LOG_DEBUG, "  fetched record, len=%d, total=%d",
 909             this_length, total_length);
 910         if (this_length + total_length > a->preferredMessageSize)
 911         {
 912             /* record is small enough, really */
 913             if (this_length <= a->preferredMessageSize)
 914             {
 915                 logf(LOG_DEBUG, "  Dropped last normal-sized record");
 916                 *pres = Z_PRES_PARTIAL_2;
 917                 break;
 918             }
 919             /* record can only be fetched by itself */
 920             if (this_length < a->maximumRecordSize)
 921             {
 922                 logf(LOG_DEBUG, "  Record > prefmsgsz");
 923                 if (toget > 1)
 924                 {
 925                     logf(LOG_DEBUG, "  Dropped it");
 926                     reclist->records[reclist->num_records] =
 927                          surrogatediagrec(a, fres->basename, 16, 0);
 928                     reclist->num_records++;
 929                     *next = fres->last_in_set ? 0 : recno + 1;
 930                     dumped_records += this_length;
 931                     continue;
 932                 }
 933             }
 934             else /* too big entirely */
 935             {
 936                 logf(LOG_DEBUG, "Record > maxrcdsz");
 937                 reclist->records[reclist->num_records] =
 938                     surrogatediagrec(a, fres->basename, 17, 0);
 939                 reclist->num_records++;
 940                 *next = fres->last_in_set ? 0 : recno + 1;
 941                 dumped_records += this_length;
 942                 continue;
 943             }
 944         }
 945         if (!(thisrec = odr_malloc(a->encode, sizeof(*thisrec))))
 946             return 0;
 947         if (!(thisrec->databaseName = odr_malloc(a->encode,
 948             strlen(fres->basename) + 1)))
 949             return 0;
 950         strcpy(thisrec->databaseName, fres->basename);
 951         thisrec->which = Z_NamePlusRecord_databaseRecord;
 952         if (!(thisrec->u.databaseRecord = thisext = odr_malloc(a->encode,
 953             sizeof(Z_DatabaseRecord))))
 954             return 0;
 955         recform.proto = a->proto;
 956         recform.oclass = CLASS_RECSYN;
 957         recform.value = fres->format;
 958         thisext->direct_reference = odr_oiddup(a->encode,
 959             oid_getoidbyent(&recform));
 960         thisext->indirect_reference = 0;
 961         thisext->descriptor = 0;
 962         if (fres->len < 0) /* Structured data */
 963         {
 964             switch (fres->format)
 965             {
 966                 case VAL_SUTRS: thisext->which = Z_External_sutrs; break;
 967                 case VAL_GRS1: thisext->which = Z_External_grs1; break;
 968                 case VAL_EXPLAIN: thisext->which = Z_External_explainRecord;
 969                     break;
 970                 case VAL_SUMMARY: thisext->which = Z_External_summary; break;
 971                 case VAL_OPAC: thisext->which = Z_External_OPAC; break;
 972
 973                 default:
 974                     logf(LOG_FATAL, "Unknown structured format from backend.");
 975                     return 0;
 976             }
 977
 978             /*
 979              * We cheat on the pointers here. Obviously, the record field
 980              * of the backend-fetch structure should have been a union for
 981              * correctness, but we're stuck with this for backwards
 982              * compatibility.
 983              */
 984             thisext->u.grs1 = (Z_GenericRecord*) fres->record;
 985         }
 986         else if (fres->format == VAL_SUTRS) /* SUTRS is a single-ASN.1-type */
 987         {
 988             Odr_oct *sutrs = odr_malloc(a->encode, sizeof(*sutrs));
 989
 990             thisext->which = Z_External_sutrs;
 991             thisext->u.sutrs = sutrs;
 992             sutrs->buf = odr_malloc(a->encode, fres->len);
 993             sutrs->len = sutrs->size = fres->len;
 994             memcpy(sutrs->buf, fres->record, fres->len);
 995         }
 996         else /* octet-aligned record. */
 997         {
 998             thisext->which = Z_External_octet;
 999             if (!(thisext->u.octet_aligned = odr_malloc(a->encode,
1000                 sizeof(Odr_oct))))
1001                 return 0;
1002             if (!(thisext->u.octet_aligned->buf = odr_malloc(a->encode,
1003                 fres->len)))
1004                 return 0;
1005             memcpy(thisext->u.octet_aligned->buf, fres->record, fres->len);
1006             thisext->u.octet_aligned->len = thisext->u.octet_aligned->size =
1007                 fres->len;
1008         }
1009         reclist->records[reclist->num_records] = thisrec;
1010         reclist->num_records++;
1011         *next = fres->last_in_set ? 0 : recno + 1;
1012     }
1013     *num = reclist->num_records;
1014     return records;
1015 }
1016
1017 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
1018     int *fd)
1019 {
1020     Z_SearchRequest *req = reqb->request->u.searchRequest;
1021     bend_searchrequest bsrq;
1022     bend_searchresult *bsrt;
1023
1024     logf(LOG_LOG, "Got SearchRequest.");
1025
1026     bsrq.setname = req->resultSetName;
1027     bsrq.replace_set = *req->replaceIndicator;
1028     bsrq.num_bases = req->num_databaseNames;
1029     bsrq.basenames = req->databaseNames;
1030     bsrq.query = req->query;
1031     bsrq.stream = assoc->encode;
1032
1033     if (!(bsrt = bend_search(assoc->backend, &bsrq, fd)))
1034         return 0;
1035     return response_searchRequest(assoc, reqb, bsrt, fd);
1036 }
1037
1038 bend_searchresult *bend_searchresponse(void *handle) {return 0;}
1039
1040 /*
1041  * Prepare a searchresponse based on the backend results. We probably want
1042  * to look at making the fetching of records nonblocking as well, but
1043  * so far, we'll keep things simple.
1044  * If bsrt is null, that means we're called in response to a communications
1045  * event, and we'll have to get the response for ourselves.
1046  */
1047 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
1048     bend_searchresult *bsrt, int *fd)
1049 {
1050     Z_SearchRequest *req = reqb->request->u.searchRequest;
1051     Z_APDU *apdu = odr_malloc (assoc->encode, sizeof(*apdu));
1052     Z_SearchResponse *resp = odr_malloc (assoc->encode, sizeof(*resp));
1053     int *nulint = odr_malloc (assoc->encode, sizeof(*nulint));
1054     bool_t *sr = odr_malloc (assoc->encode, sizeof(*sr));
1055     int *next = odr_malloc (assoc->encode, sizeof(*next));
1056     int *none = odr_malloc (assoc->encode, sizeof(*none));
1057
1058     *nulint = 0;
1059     *sr = 1;
1060     *next = 0;
1061     *none = Z_RES_NONE;
1062
1063     apdu->which = Z_APDU_searchResponse;
1064     apdu->u.searchResponse = resp;
1065     resp->referenceId = req->referenceId;
1066     resp->additionalSearchInfo = 0;
1067     resp->otherInfo = 0;
1068     *fd = -1;
1069     if (!bsrt && !(bsrt = bend_searchresponse(assoc->backend)))
1070     {
1071         logf(LOG_FATAL, "Bad result from backend");
1072         return 0;
1073     }
1074     else if (bsrt->errcode)
1075     {
1076         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
1077         resp->resultCount = nulint;
1078         resp->numberOfRecordsReturned = nulint;
1079         resp->nextResultSetPosition = nulint;
1080         resp->searchStatus = nulint;
1081         resp->resultSetStatus = none;
1082         resp->presentStatus = 0;
1083     }
1084     else
1085     {
1086         int *toget = odr_malloc (assoc->encode, sizeof(*toget));
1087         int *presst = odr_malloc (assoc->encode, sizeof(*presst));
1088         Z_RecordComposition comp, *compp = 0;
1089
1090         *toget = 0;
1091         *presst = 0;
1092         resp->records = 0;
1093         resp->resultCount = &bsrt->hits;
1094
1095         comp.which = Z_RecordComp_simple;
1096         /* how many records does the user agent want, then? */
1097         if (bsrt->hits <= *req->smallSetUpperBound)
1098         {
1099             *toget = bsrt->hits;
1100             if ((comp.u.simple = req->smallSetElementSetNames))
1101                 compp = &comp;
1102         }
1103         else if (bsrt->hits < *req->largeSetLowerBound)
1104         {
1105             *toget = *req->mediumSetPresentNumber;
1106             if (*toget > bsrt->hits)
1107                 *toget = bsrt->hits;
1108             if ((comp.u.simple = req->mediumSetElementSetNames))
1109                 compp = &comp;
1110         }
1111         else
1112             *toget = 0;
1113
1114         if (*toget && !resp->records)
1115         {
1116             oident *prefformat;
1117             oid_value form;
1118
1119             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
1120                 prefformat->oclass != CLASS_RECSYN)
1121                 form = VAL_NONE;
1122             else
1123                 form = prefformat->value;
1124             resp->records = pack_records(assoc, req->resultSetName, 1,
1125                 toget, compp, next, presst, form);
1126             if (!resp->records)
1127                 return 0;
1128             resp->numberOfRecordsReturned = toget;
1129             resp->nextResultSetPosition = next;
1130             resp->searchStatus = sr;
1131             resp->resultSetStatus = 0;
1132             resp->presentStatus = presst;
1133         }
1134         else
1135         {
1136             if (*resp->resultCount)
1137                 *next = 1;
1138             resp->numberOfRecordsReturned = nulint;
1139             resp->nextResultSetPosition = next;
1140             resp->searchStatus = sr;
1141             resp->resultSetStatus = 0;
1142             resp->presentStatus = 0;
1143         }
1144     }
1145     return apdu;
1146 }
1147
1148 /*
1149  * Maybe we got a little over-friendly when we designed bend_fetch to
1150  * get only one record at a time. Some backends can optimise multiple-record
1151  * fetches, and at any rate, there is some overhead involved in
1152  * all that selecting and hopping around. Problem is, of course, that the
1153  * frontend can't know ahead of time how many records it'll need to
1154  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
1155  * is downright lousy as a bulk data transfer protocol.
1156  *
1157  * To start with, we'll do the fetching of records from the backend
1158  * in one operation: To save some trips in and out of the event-handler,
1159  * and to simplify the interface to pack_records. At any rate, asynch
1160  * operation is more fun in operations that have an unpredictable execution
1161  * speed - which is normally more true for search than for present.
1162  */
1163 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
1164     int *fd)
1165 {
1166     Z_PresentRequest *req = reqb->request->u.presentRequest;
1167     Z_APDU *apdu = odr_malloc (assoc->encode, sizeof(*apdu));
1168     Z_PresentResponse *resp = odr_malloc (assoc->encode, sizeof(*resp));
1169     int *presst = odr_malloc (assoc->encode, sizeof(*presst));
1170     int *next = odr_malloc (assoc->encode, sizeof(*next));
1171     int *num = odr_malloc (assoc->encode, sizeof(*num));
1172     oident *prefformat;
1173     oid_value form;
1174
1175     logf(LOG_LOG, "Got PresentRequest.");
1176     *presst = 0;
1177     *next = 0;
1178     *num = 0;
1179
1180     apdu->which = Z_APDU_presentResponse;
1181     apdu->u.presentResponse = resp;
1182     resp->referenceId = req->referenceId;
1183     resp->otherInfo = 0;
1184
1185     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)) ||
1186         prefformat->oclass != CLASS_RECSYN)
1187         form = VAL_NONE;
1188     else
1189         form = prefformat->value;
1190     *num = *req->numberOfRecordsRequested;
1191     resp->records = pack_records(assoc, req->resultSetId,
1192         *req->resultSetStartPoint, num, req->recordComposition, next,
1193         presst, form);
1194     if (!resp->records)
1195         return 0;
1196     resp->numberOfRecordsReturned = num;
1197     resp->presentStatus = presst;
1198     resp->nextResultSetPosition = next;
1199
1200     return apdu;
1201 }
1202
1203 /*
1204  * Scan was implemented rather in a hurry, and with support for only the basic
1205  * elements of the service in the backend API. Suggestions are welcome.
1206  */
1207 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
1208 {
1209     Z_ScanRequest *req = reqb->request->u.scanRequest;
1210     Z_APDU *apdu = odr_malloc (assoc->encode, sizeof(*apdu));
1211     Z_ScanResponse *res = odr_malloc (assoc->encode, sizeof(*res));
1212     int *scanStatus = odr_malloc (assoc->encode, sizeof(*scanStatus));
1213     int *numberOfEntriesReturned =
1214          odr_malloc (assoc->encode, sizeof(*numberOfEntriesReturned));
1215     Z_ListEntries *ents = odr_malloc (assoc->encode, sizeof(*ents));
1216     oident *attent;
1217     bend_scanrequest srq;
1218     bend_scanresult *srs;
1219     oident *attset;
1220
1221     logf(LOG_LOG, "Got scanrequest");
1222     *scanStatus = Z_Scan_failure;
1223     *numberOfEntriesReturned = 0;
1224
1225     apdu->which = Z_APDU_scanResponse;
1226     apdu->u.scanResponse = res;
1227     res->referenceId = req->referenceId;
1228     res->stepSize = 0;
1229     res->scanStatus = scanStatus;
1230     res->numberOfEntriesReturned = numberOfEntriesReturned;
1231     res->positionOfTerm = 0;
1232     res->entries = ents;
1233     ents->which = Z_ListEntries_nonSurrogateDiagnostics;
1234     res->attributeSet = 0;
1235     res->otherInfo = 0;
1236
1237     if (req->attributeSet && (!(attent = oid_getentbyoid(req->attributeSet)) ||
1238         attent->oclass != CLASS_ATTSET || attent->value != VAL_BIB1))
1239         ents->u.nonSurrogateDiagnostics = diagrecs(assoc, 121, 0);
1240     else if (req->stepSize && *req->stepSize > 0)
1241         ents->u.nonSurrogateDiagnostics = diagrecs(assoc, 205, 0);
1242     else
1243     {
1244         if (req->termListAndStartPoint->term->which == Z_Term_general)
1245             logf(LOG_DEBUG, " term: '%.*s'",
1246                 req->termListAndStartPoint->term->u.general->len,
1247                 req->termListAndStartPoint->term->u.general->buf);
1248         srq.num_bases = req->num_databaseNames;
1249         srq.basenames = req->databaseNames;
1250         srq.num_entries = *req->numberOfTermsRequested;
1251         srq.term = req->termListAndStartPoint;
1252         srq.stream = assoc->encode;
1253         if (!(attset = oid_getentbyoid(req->attributeSet)) ||
1254             attset->oclass != CLASS_RECSYN)
1255             srq.attributeset = VAL_NONE;
1256         else
1257             srq.attributeset = attset->value;
1258         srq.term_position = req->preferredPositionInResponse ?
1259             *req->preferredPositionInResponse : 1;
1260         if (!(srs = bend_scan(assoc->backend, &srq, 0)))
1261             ents->u.nonSurrogateDiagnostics = diagrecs(assoc, 2, 0);
1262         else if (srs->errcode)
1263             ents->u.nonSurrogateDiagnostics = diagrecs(assoc,
1264                 srs->errcode, srs->errstring);
1265         else
1266         {
1267             int i;
1268             Z_Entries *list = odr_malloc (assoc->encode, sizeof(*list));
1269             Z_Entry **tab = odr_malloc (assoc->encode,
1270                                         sizeof(*tab) * srs->num_entries);
1271
1272             if (srs->status == BEND_SCAN_PARTIAL)
1273                 *scanStatus = Z_Scan_partial_5;
1274             else
1275                 *scanStatus = Z_Scan_success;
1276             ents->which = Z_ListEntries_entries;
1277             ents->u.entries = list;
1278             list->entries = tab;
1279             for (i = 0; i < srs->num_entries; i++)
1280             {
1281                 Z_Entry *e;
1282                 Z_TermInfo *t;
1283                 Odr_oct *o;
1284
1285                 list->entries[i] = e = odr_malloc(assoc->encode, sizeof(*e));
1286                 e->which = Z_Entry_termInfo;
1287                 e->u.termInfo = t = odr_malloc(assoc->encode, sizeof(*t));
1288                 t->suggestedAttributes = 0;
1289                 t->displayTerm = 0;
1290                 t->alternativeTerm = 0;
1291                 t->byAttributes = 0;
1292                 t->otherTermInfo = 0;
1293                 t->globalOccurrences = &srs->entries[i].occurrences;
1294                 t->term = odr_malloc(assoc->encode, sizeof(*t->term));
1295                 t->term->which = Z_Term_general;
1296                 t->term->u.general = o = odr_malloc(assoc->encode,
1297                     sizeof(Odr_oct));
1298                 o->buf = odr_malloc(assoc->encode, o->len = o->size =
1299                     strlen(srs->entries[i].term));
1300                 memcpy(o->buf, srs->entries[i].term, o->len);
1301                 logf(LOG_DEBUG, "  term #%d: '%s' (%d)", i,
1302                     srs->entries[i].term, srs->entries[i].occurrences);
1303             }
1304             list->num_entries = i;
1305             res->numberOfEntriesReturned = &list->num_entries;
1306             res->positionOfTerm = &srs->term_position;
1307         }
1308     }
1309
1310     return apdu;
1311 }
1312
1313 static void process_close(association *assoc, request *reqb)
1314 {
1315     Z_Close *req = reqb->request->u.close;
1316     static char *reasons[] =
1317     {
1318         "finished",
1319         "shutdown",
1320         "systemProblem",
1321         "costLimit",
1322         "resources",
1323         "securityViolation",
1324         "protocolError",
1325         "lackOfActivity",
1326         "peerAbort",
1327         "unspecified"
1328     };
1329
1330     logf(LOG_LOG, "Got close, reason %s, message %s",
1331         reasons[*req->closeReason], req->diagnosticInformation ?
1332         req->diagnosticInformation : "NULL");
1333     if (assoc->version < 3) /* to make do_force respond with close */
1334         assoc->version = 3;
1335     do_close(assoc, Z_Close_finished, "Association terminated by client");
1336 }