server/seshigh.c

   1 /*
   2  * Copyright (c) 1995-2003, Index Data
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: seshigh.c,v 1.152 2003-03-25 09:55:11 adam Exp $
   6  */
   7
   8 /*
   9  * Frontend server logic.
  10  *
  11  * This code receives incoming APDUs, and handles client requests by means
  12  * of the backend API.
  13  *
  14  * Some of the code is getting quite involved, compared to simpler servers -
  15  * primarily because it is asynchronous both in the communication with
  16  * the user and the backend. We think the complexity will pay off in
  17  * the form of greater flexibility when more asynchronous facilities
  18  * are implemented.
  19  *
  20  * Memory management has become somewhat involved. In the simple case, where
  21  * only one PDU is pending at a time, it will simply reuse the same memory,
  22  * once it has found its working size. When we enable multiple concurrent
  23  * operations, perhaps even with multiple parallel calls to the backend, it
  24  * will maintain a pool of buffers for encoding and decoding, trying to
  25  * minimize memory allocation/deallocation during normal operation.
  26  *
  27  */
  28
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <sys/types.h>
  32 #ifdef WIN32
  33 #include <io.h>
  34 #define S_ISREG(x) (x & _S_IFREG)
  35 #include <process.h>
  36 #include <sys/stat.h>
  37 #else
  38 #include <sys/stat.h>
  39 #include <unistd.h>
  40 #endif
  41 #include <assert.h>
  42 #include <ctype.h>
  43
  44 #include <yaz/yconfig.h>
  45 #include <yaz/xmalloc.h>
  46 #include <yaz/comstack.h>
  47 #include "eventl.h"
  48 #include "session.h"
  49 #include <yaz/proto.h>
  50 #include <yaz/oid.h>
  51 #include <yaz/log.h>
  52 #include <yaz/logrpn.h>
  53 #include <yaz/statserv.h>
  54 #include <yaz/diagbib1.h>
  55 #include <yaz/charneg.h>
  56 #include <yaz/otherinfo.h>
  57 #include <yaz/yaz-util.h>
  58 #include <yaz/pquery.h>
  59
  60 #include <yaz/srw.h>
  61 #include <yaz/backend.h>
  62
  63 static void process_gdu_request(association *assoc, request *req);
  64 static int process_z_request(association *assoc, request *req, char **msg);
  65 void backend_response(IOCHAN i, int event);
  66 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  67 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  68 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  69 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  70     int *fd);
  71 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  72     bend_search_rr *bsrr, int *fd);
  73 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  74     int *fd);
  75 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  76 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  77 static void process_close(association *assoc, request *reqb);
  78 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  79 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  80     int *fd);
  81 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
  82
  83 static FILE *apduf = 0; /* for use in static mode */
  84 static statserv_options_block *control_block = 0;
  85
  86 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
  87
  88 /*
  89  * Create and initialize a new association-handle.
  90  *  channel  : iochannel for the current line.
  91  *  link     : communications channel.
  92  * Returns: 0 or a new association handle.
  93  */
  94 association *create_association(IOCHAN channel, COMSTACK link)
  95 {
  96     association *anew;
  97
  98     if (!control_block)
  99         control_block = statserv_getcontrol();
 100     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 101         return 0;
 102     anew->init = 0;
 103     anew->version = 0;
 104     anew->client_chan = channel;
 105     anew->client_link = link;
 106     anew->cs_get_mask = 0;
 107     anew->cs_put_mask = 0;
 108     anew->cs_accept_mask = 0;
 109     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 110         !(anew->encode = odr_createmem(ODR_ENCODE)))
 111         return 0;
 112     if (*control_block->apdufile)
 113     {
 114         char filename[256];
 115         FILE *f;
 116
 117         strcpy(filename, control_block->apdufile);
 118         if (!(anew->print = odr_createmem(ODR_PRINT)))
 119             return 0;
 120         if (*control_block->apdufile == '@')
 121         {
 122             odr_setprint(anew->print, yaz_log_file());
 123         }
 124         else if (*control_block->apdufile != '-')
 125         {
 126             strcpy(filename, control_block->apdufile);
 127             if (!control_block->dynamic)
 128             {
 129                 if (!apduf)
 130                 {
 131                     if (!(apduf = fopen(filename, "w")))
 132                     {
 133                         yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename);
 134                         return 0;
 135                     }
 136                     setvbuf(apduf, 0, _IONBF, 0);
 137                 }
 138                 f = apduf;
 139             }
 140             else
 141             {
 142                 sprintf(filename + strlen(filename), ".%d", getpid());
 143                 if (!(f = fopen(filename, "w")))
 144                 {
 145                     yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename);
 146                     return 0;
 147                 }
 148                 setvbuf(f, 0, _IONBF, 0);
 149             }
 150             odr_setprint(anew->print, f);
 151         }
 152     }
 153     else
 154         anew->print = 0;
 155     anew->input_buffer = 0;
 156     anew->input_buffer_len = 0;
 157     anew->backend = 0;
 158     anew->state = ASSOC_NEW;
 159     request_initq(&anew->incoming);
 160     request_initq(&anew->outgoing);
 161     anew->proto = cs_getproto(link);
 162     return anew;
 163 }
 164
 165 /*
 166  * Free association and release resources.
 167  */
 168 void destroy_association(association *h)
 169 {
 170     statserv_options_block *cb = statserv_getcontrol();
 171
 172     xfree(h->init);
 173     odr_destroy(h->decode);
 174     odr_destroy(h->encode);
 175     if (h->print)
 176         odr_destroy(h->print);
 177     if (h->input_buffer)
 178     xfree(h->input_buffer);
 179     if (h->backend)
 180         (*cb->bend_close)(h->backend);
 181     while (request_deq(&h->incoming));
 182     while (request_deq(&h->outgoing));
 183     request_delq(&h->incoming);
 184     request_delq(&h->outgoing);
 185     xfree(h);
 186     xmalloc_trav("session closed");
 187     if (control_block && control_block->one_shot)
 188     {
 189         exit (0);
 190     }
 191 }
 192
 193 static void do_close_req(association *a, int reason, char *message,
 194                          request *req)
 195 {
 196     Z_APDU apdu;
 197     Z_Close *cls = zget_Close(a->encode);
 198
 199     /* Purge request queue */
 200     while (request_deq(&a->incoming));
 201     while (request_deq(&a->outgoing));
 202     if (a->version >= 3)
 203     {
 204         yaz_log(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
 205             reason, message ? message : "none");
 206         apdu.which = Z_APDU_close;
 207         apdu.u.close = cls;
 208         *cls->closeReason = reason;
 209         cls->diagnosticInformation = message;
 210         process_z_response(a, req, &apdu);
 211         iochan_settimeout(a->client_chan, 20);
 212     }
 213     else
 214     {
 215         yaz_log(LOG_DEBUG, "v2 client. No Close PDU");
 216         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 217     }
 218     a->state = ASSOC_DEAD;
 219 }
 220
 221 static void do_close(association *a, int reason, char *message)
 222 {
 223     do_close_req (a, reason, message, request_get(&a->outgoing));
 224 }
 225
 226 /*
 227  * This is where PDUs from the client are read and the further
 228  * processing is initiated. Flow of control moves down through the
 229  * various process_* functions below, until the encoded result comes back up
 230  * to the output handler in here.
 231  *
 232  *  h     : the I/O channel that has an outstanding event.
 233  *  event : the current outstanding event.
 234  */
 235 void ir_session(IOCHAN h, int event)
 236 {
 237     int res;
 238     association *assoc = (association *)iochan_getdata(h);
 239     COMSTACK conn = assoc->client_link;
 240     request *req;
 241
 242     assert(h && conn && assoc);
 243     if (event == EVENT_TIMEOUT)
 244     {
 245         if (assoc->state != ASSOC_UP)
 246         {
 247             yaz_log(LOG_LOG, "Final timeout - closing connection.");
 248             cs_close(conn);
 249             destroy_association(assoc);
 250             iochan_destroy(h);
 251         }
 252         else
 253         {
 254             yaz_log(LOG_LOG, "Session idle too long. Sending close.");
 255             do_close(assoc, Z_Close_lackOfActivity, 0);
 256         }
 257         return;
 258     }
 259     if (event & assoc->cs_accept_mask)
 260     {
 261         yaz_log (LOG_DEBUG, "ir_session (accept)");
 262         if (!cs_accept (conn))
 263         {
 264             yaz_log (LOG_LOG, "accept failed");
 265             destroy_association(assoc);
 266             iochan_destroy(h);
 267         }
 268         iochan_clearflag (h, EVENT_OUTPUT|EVENT_OUTPUT);
 269         if (conn->io_pending)
 270         {   /* cs_accept didn't complete */
 271             assoc->cs_accept_mask =
 272                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 273                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 274
 275             iochan_setflag (h, assoc->cs_accept_mask);
 276         }
 277         else
 278         {   /* cs_accept completed. Prepare for reading (cs_get) */
 279             assoc->cs_accept_mask = 0;
 280             assoc->cs_get_mask = EVENT_INPUT;
 281             iochan_setflag (h, assoc->cs_get_mask);
 282         }
 283         return;
 284     }
 285     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 286     {
 287         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 288         {
 289             yaz_log(LOG_DEBUG, "ir_session (input)");
 290             /* We aren't speaking to this fellow */
 291             if (assoc->state == ASSOC_DEAD)
 292             {
 293                 yaz_log(LOG_LOG, "Connection closed - end of session");
 294                 cs_close(conn);
 295                 destroy_association(assoc);
 296                 iochan_destroy(h);
 297                 return;
 298             }
 299             assoc->cs_get_mask = EVENT_INPUT;
 300             if ((res = cs_get(conn, &assoc->input_buffer,
 301                 &assoc->input_buffer_len)) <= 0)
 302             {
 303                 yaz_log(LOG_LOG, "Connection closed by client");
 304                 cs_close(conn);
 305                 destroy_association(assoc);
 306                 iochan_destroy(h);
 307                 return;
 308             }
 309             else if (res == 1) /* incomplete read - wait for more  */
 310             {
 311                 if (conn->io_pending & CS_WANT_WRITE)
 312                     assoc->cs_get_mask |= EVENT_OUTPUT;
 313                 iochan_setflag(h, assoc->cs_get_mask);
 314                 return;
 315             }
 316             if (cs_more(conn)) /* more stuff - call us again later, please */
 317                 iochan_setevent(h, EVENT_INPUT);
 318
 319             /* we got a complete PDU. Let's decode it */
 320             yaz_log(LOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 321                             assoc->input_buffer[0] & 0xff,
 322                             assoc->input_buffer[1] & 0xff,
 323                             assoc->input_buffer[2] & 0xff);
 324             req = request_get(&assoc->incoming); /* get a new request */
 325             odr_reset(assoc->decode);
 326             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 327             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 328             {
 329                 yaz_log(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ",
 330                         odr_errmsg(odr_geterror(assoc->decode)),
 331                         odr_offset(assoc->decode));
 332                 if (assoc->decode->error != OHTTP)
 333                 {
 334                     yaz_log(LOG_LOG, "PDU dump:");
 335                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 336                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 337                 }
 338                 else
 339                 {
 340                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 341                     assoc->state = ASSOC_DEAD;
 342                     process_gdu_response(assoc, req, p);
 343                 }
 344                 return;
 345             }
 346             req->request_mem = odr_extract_mem(assoc->decode);
 347             if (assoc->print && !z_GDU(assoc->print, &req->gdu_request, 0, 0))
 348             {
 349                 yaz_log(LOG_WARN, "ODR print error: %s",
 350                     odr_errmsg(odr_geterror(assoc->print)));
 351                 odr_reset(assoc->print);
 352             }
 353             request_enq(&assoc->incoming, req);
 354         }
 355
 356         /* can we do something yet? */
 357         req = request_head(&assoc->incoming);
 358         if (req->state == REQUEST_IDLE)
 359         {
 360             request_deq(&assoc->incoming);
 361             process_gdu_request(assoc, req);
 362         }
 363     }
 364     if (event & assoc->cs_put_mask)
 365     {
 366         request *req = request_head(&assoc->outgoing);
 367
 368         assoc->cs_put_mask = 0;
 369         yaz_log(LOG_DEBUG, "ir_session (output)");
 370         req->state = REQUEST_PENDING;
 371         switch (res = cs_put(conn, req->response, req->len_response))
 372         {
 373         case -1:
 374             yaz_log(LOG_LOG, "Connection closed by client");
 375             cs_close(conn);
 376             destroy_association(assoc);
 377             iochan_destroy(h);
 378             break;
 379         case 0: /* all sent - release the request structure */
 380             yaz_log(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 381 #if 0
 382             yaz_log(LOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 383                     req->response);
 384 #endif
 385             nmem_destroy(req->request_mem);
 386             request_deq(&assoc->outgoing);
 387             request_release(req);
 388             if (!request_head(&assoc->outgoing))
 389             {   /* restore mask for cs_get operation ... */
 390                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 391                 iochan_setflag(h, assoc->cs_get_mask);
 392                 if (assoc->state == ASSOC_DEAD)
 393                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 394             }
 395             else
 396             {
 397                 assoc->cs_put_mask = EVENT_OUTPUT;
 398             }
 399             break;
 400         default:
 401             if (conn->io_pending & CS_WANT_WRITE)
 402                 assoc->cs_put_mask |= EVENT_OUTPUT;
 403             if (conn->io_pending & CS_WANT_READ)
 404                 assoc->cs_put_mask |= EVENT_INPUT;
 405             iochan_setflag(h, assoc->cs_put_mask);
 406         }
 407     }
 408     if (event & EVENT_EXCEPT)
 409     {
 410         yaz_log(LOG_LOG, "ir_session (exception)");
 411         cs_close(conn);
 412         destroy_association(assoc);
 413         iochan_destroy(h);
 414     }
 415 }
 416
 417 static int process_z_request(association *assoc, request *req, char **msg);
 418
 419 static void assoc_init_reset(association *assoc)
 420 {
 421     xfree (assoc->init);
 422     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 423
 424     assoc->init->stream = assoc->encode;
 425     assoc->init->print = assoc->print;
 426     assoc->init->auth = 0;
 427     assoc->init->referenceId = 0;
 428     assoc->init->implementation_version = 0;
 429     assoc->init->implementation_id = 0;
 430     assoc->init->implementation_name = 0;
 431     assoc->init->bend_sort = NULL;
 432     assoc->init->bend_search = NULL;
 433     assoc->init->bend_present = NULL;
 434     assoc->init->bend_esrequest = NULL;
 435     assoc->init->bend_delete = NULL;
 436     assoc->init->bend_scan = NULL;
 437     assoc->init->bend_segment = NULL;
 438     assoc->init->bend_fetch = NULL;
 439     assoc->init->bend_explain = NULL;
 440
 441     assoc->init->charneg_request = NULL;
 442     assoc->init->charneg_response = NULL;
 443
 444     assoc->init->decode = assoc->decode;
 445     assoc->init->peer_name =
 446         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 447 }
 448
 449 static int srw_bend_init(association *assoc)
 450 {
 451     const char *encoding = "UTF-8";
 452     Z_External *ce;
 453     bend_initresult *binitres;
 454     statserv_options_block *cb = statserv_getcontrol();
 455
 456     assoc_init_reset(assoc);
 457
 458     assoc->maximumRecordSize = 3000000;
 459     assoc->preferredMessageSize = 3000000;
 460 #if 1
 461     ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 462     assoc->init->charneg_request = ce->u.charNeg3;
 463 #endif
 464     if (!(binitres = (*cb->bend_init)(assoc->init)))
 465     {
 466         yaz_log(LOG_WARN, "Bad response from backend.");
 467         return 0;
 468     }
 469     assoc->backend = binitres->handle;
 470     return 1;
 471 }
 472
 473 static int srw_bend_fetch(association *assoc, int pos,
 474                           Z_SRW_searchRetrieveRequest *srw_req,
 475                           Z_SRW_record *record)
 476 {
 477     bend_fetch_rr rr;
 478     ODR o = assoc->encode;
 479
 480     rr.setname = "default";
 481     rr.number = pos;
 482     rr.referenceId = 0;
 483     rr.request_format = VAL_TEXT_XML;
 484     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 485                                                    CLASS_TRANSYN,
 486                                                    VAL_TEXT_XML);
 487     rr.comp = (Z_RecordComposition *)
 488             odr_malloc(assoc->decode, sizeof(*rr.comp));
 489     rr.comp->which = Z_RecordComp_complex;
 490     rr.comp->u.complex = (Z_CompSpec *)
 491             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 492     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 493         odr_malloc(assoc->encode, sizeof(bool_t));
 494     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 495     rr.comp->u.complex->num_dbSpecific = 0;
 496     rr.comp->u.complex->dbSpecific = 0;
 497     rr.comp->u.complex->num_recordSyntax = 0;
 498     rr.comp->u.complex->recordSyntax = 0;
 499
 500     rr.comp->u.complex->generic = (Z_Specification *)
 501             odr_malloc(assoc->decode, sizeof(Z_Specification));
 502     rr.comp->u.complex->generic->which = Z_Schema_uri;
 503     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 504     rr.comp->u.complex->generic->elementSpec = 0;
 505
 506     rr.stream = assoc->encode;
 507     rr.print = assoc->print;
 508
 509     rr.basename = 0;
 510     rr.len = 0;
 511     rr.record = 0;
 512     rr.last_in_set = 0;
 513     rr.output_format = VAL_TEXT_XML;
 514     rr.output_format_raw = 0;
 515     rr.errcode = 0;
 516     rr.errstring = 0;
 517     rr.surrogate_flag = 0;
 518
 519     if (!assoc->init->bend_fetch)
 520         return 1;
 521
 522     (*assoc->init->bend_fetch)(assoc->backend, &rr);
 523
 524     if (rr.len >= 0)
 525     {
 526         record->recordData_buf = rr.record;
 527         record->recordData_len = rr.len;
 528         record->recordPosition = odr_intdup(o, pos);
 529         record->recordSchema = 0;
 530         if (srw_req->recordSchema)
 531             record->recordSchema = odr_strdup(o, srw_req->recordSchema);
 532     }
 533     return rr.errcode;
 534 }
 535
 536 static void srw_bend_search(association *assoc, request *req,
 537                             Z_SRW_searchRetrieveRequest *srw_req,
 538                             Z_SRW_searchRetrieveResponse *srw_res)
 539 {
 540     int srw_error = 0;
 541     bend_search_rr rr;
 542     Z_External *ext;
 543
 544     yaz_log(LOG_LOG, "Got SRW SearchRetrieveRequest");
 545     yaz_log(LOG_DEBUG, "srw_bend_search");
 546     if (!assoc->init)
 547     {
 548         yaz_log(LOG_DEBUG, "srw_bend_init");
 549         if (!srw_bend_init(assoc))
 550         {
 551             srw_error = 3;  /* assume Authentication error */
 552
 553             srw_res->num_diagnostics = 1;
 554             srw_res->diagnostics = (Z_SRW_diagnostic *)
 555                 odr_malloc(assoc->encode, sizeof(*srw_res->diagnostics));
 556             srw_res->diagnostics[0].code =
 557                 odr_intdup(assoc->encode, srw_error);
 558             srw_res->diagnostics[0].details = 0;
 559             return;
 560         }
 561     }
 562
 563     rr.setname = "default";
 564     rr.replace_set = 1;
 565     rr.num_bases = 1;
 566     rr.basenames = &srw_req->database;
 567     rr.referenceId = 0;
 568
 569     rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 570
 571     if (srw_req->query_type == Z_SRW_query_type_cql)
 572     {
 573         ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 574         ext->direct_reference = odr_getoidbystr(assoc->decode,
 575                                                 "1.2.840.10003.16.2");
 576         ext->indirect_reference = 0;
 577         ext->descriptor = 0;
 578         ext->which = Z_External_CQL;
 579         ext->u.cql = srw_req->query.cql;
 580
 581         rr.query->which = Z_Query_type_104;
 582         rr.query->u.type_104 =  ext;
 583     }
 584     else if (srw_req->query_type == Z_SRW_query_type_pqf)
 585     {
 586         Z_RPNQuery *RPNquery;
 587         YAZ_PQF_Parser pqf_parser;
 588
 589         pqf_parser = yaz_pqf_create ();
 590
 591         RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 592                                   srw_req->query.pqf);
 593         if (!RPNquery)
 594         {
 595             const char *pqf_msg;
 596             size_t off;
 597             int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 598             yaz_log(LOG_LOG, "%*s^\n", off+4, "");
 599             yaz_log(LOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
 600
 601             srw_error = 10;
 602         }
 603
 604         rr.query->which = Z_Query_type_1;
 605         rr.query->u.type_1 =  RPNquery;
 606
 607         yaz_pqf_destroy (pqf_parser);
 608     }
 609     else
 610         srw_error = 11;
 611
 612     if (!srw_error && srw_req->sort_type != Z_SRW_sort_type_none)
 613         srw_error = 80;
 614
 615     if (!srw_error && !assoc->init->bend_search)
 616         srw_error = 1;
 617
 618     if (srw_error)
 619     {
 620         yaz_log(LOG_DEBUG, "srw_bend_search returned SRW error %d", srw_error);
 621         srw_res->num_diagnostics = 1;
 622         srw_res->diagnostics = (Z_SRW_diagnostic *)
 623             odr_malloc(assoc->encode, sizeof(*srw_res->diagnostics));
 624         srw_res->diagnostics[0].code =
 625             odr_intdup(assoc->encode, srw_error);
 626         srw_res->diagnostics[0].details = 0;
 627         return;
 628     }
 629
 630     rr.stream = assoc->encode;
 631     rr.decode = assoc->decode;
 632     rr.print = assoc->print;
 633     rr.request = req;
 634     rr.association = assoc;
 635     rr.fd = 0;
 636     rr.hits = 0;
 637     rr.errcode = 0;
 638     rr.errstring = 0;
 639     rr.search_info = 0;
 640     yaz_log_zquery(rr.query);
 641     (assoc->init->bend_search)(assoc->backend, &rr);
 642     srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 643     if (rr.errcode)
 644     {
 645         yaz_log(LOG_DEBUG, "bend_search returned Bib-1 code %d", rr.errcode);
 646         srw_res->num_diagnostics = 1;
 647         srw_res->diagnostics = (Z_SRW_diagnostic *)
 648             odr_malloc(assoc->encode, sizeof(*srw_res->diagnostics));
 649         srw_res->diagnostics[0].code =
 650             odr_intdup(assoc->encode,
 651                        yaz_diag_bib1_to_srw (rr.errcode));
 652         srw_res->diagnostics[0].details = rr.errstring;
 653         yaz_log(LOG_DEBUG, "srw_bend_search returned SRW error %d",
 654                 srw_res->diagnostics[0].code);
 655
 656     }
 657     else
 658     {
 659         srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 660         if (srw_req->maximumRecords && *srw_req->maximumRecords > 0)
 661         {
 662             int number = *srw_req->maximumRecords;
 663             int start = 1;
 664             int i;
 665
 666             if (srw_req->startRecord)
 667                 start = *srw_req->startRecord;
 668
 669             yaz_log(LOG_DEBUG, "srw_bend_search. start=%d max=%d",
 670                     start, *srw_req->maximumRecords);
 671
 672             if (start <= rr.hits)
 673             {
 674                 int j = 0;
 675                 int packing = Z_SRW_recordPacking_string;
 676                 if (start + number > rr.hits)
 677                     number = rr.hits - start + 1;
 678                 if (srw_req->recordPacking &&
 679                     !strcmp(srw_req->recordPacking, "xml"))
 680                     packing = Z_SRW_recordPacking_XML;
 681                 srw_res->records = (Z_SRW_record *)
 682                     odr_malloc(assoc->encode,
 683                                number * sizeof(*srw_res->records));
 684                 for (i = 0; i<number; i++)
 685                 {
 686                     int errcode;
 687
 688                     srw_res->records[j].recordPacking = packing;
 689                     srw_res->records[j].recordData_buf = 0;
 690                     yaz_log(LOG_DEBUG, "srw_bend_fetch %d", i+start);
 691                     errcode = srw_bend_fetch(assoc, i+start, srw_req,
 692                                              srw_res->records + j);
 693                     if (errcode)
 694                     {
 695                         srw_res->num_diagnostics = 1;
 696                         srw_res->diagnostics = (Z_SRW_diagnostic *)
 697                             odr_malloc(assoc->encode,
 698                                        sizeof(*srw_res->diagnostics));
 699                         srw_res->diagnostics[0].code =
 700                             odr_intdup(assoc->encode,
 701                                        yaz_diag_bib1_to_srw (errcode));
 702                         srw_res->diagnostics[0].details = rr.errstring;
 703                         break;
 704                     }
 705                     if (srw_res->records[j].recordData_buf)
 706                         j++;
 707                 }
 708                 srw_res->num_records = j;
 709                 if (!j)
 710                     srw_res->records = 0;
 711             }
 712         }
 713     }
 714 }
 715
 716
 717 static void srw_bend_explain(association *assoc, request *req,
 718                              Z_SRW_explainRequest *srw_req,
 719                              Z_SRW_explainResponse *srw_res)
 720 {
 721     yaz_log(LOG_LOG, "Got SRW ExplainRequest");
 722     if (!assoc->init)
 723     {
 724         yaz_log(LOG_DEBUG, "srw_bend_init");
 725         if (!srw_bend_init(assoc))
 726             return;
 727     }
 728     if (assoc->init && assoc->init->bend_explain)
 729     {
 730         bend_explain_rr rr;
 731
 732         rr.stream = assoc->encode;
 733         rr.decode = assoc->decode;
 734         rr.print = assoc->print;
 735         rr.explain_buf = 0;
 736         (*assoc->init->bend_explain)(assoc->backend, &rr);
 737         if (rr.explain_buf)
 738         {
 739             srw_res->explainData_buf = rr.explain_buf;
 740             srw_res->explainData_len = strlen(rr.explain_buf);
 741         }
 742     }
 743 }
 744
 745 static int hex_digit (int ch)
 746 {
 747     if (ch >= '0' && ch <= '9')
 748         return ch - '0';
 749     else if (ch >= 'a' && ch <= 'f')
 750         return ch - 'a'+10;
 751     else if (ch >= 'A' && ch <= 'F')
 752         return ch - 'A'+10;
 753     return 0;
 754 }
 755
 756 static char *uri_val(const char *path, const char *name, ODR o)
 757 {
 758     size_t nlen = strlen(name);
 759     if (*path != '?')
 760         return 0;
 761     path++;
 762     while (path && *path)
 763     {
 764         const char *p1 = strchr(path, '=');
 765         if (!p1)
 766             break;
 767         if (p1 - path == nlen && !memcmp(path, name, nlen))
 768         {
 769             size_t i = 0;
 770             char *ret;
 771
 772             path = p1 + 1;
 773             p1 = strchr(path, '&');
 774             if (!p1)
 775                 p1 = strlen(path) + path;
 776             ret = odr_malloc(o, p1 - path + 1);
 777             while (*path && *path != '&')
 778             {
 779                 if (*path == '+')
 780                 {
 781                     ret[i++] = ' ';
 782                     path++;
 783                 }
 784                 else if (*path == '%' && path[1] && path[2])
 785                 {
 786                     ret[i++] = hex_digit (path[1])*16 + hex_digit (path[2]);
 787                     path = path + 3;
 788                 }
 789                 else
 790                     ret[i++] = *path++;
 791             }
 792             ret[i] = '\0';
 793             return ret;
 794         }
 795         path = strchr(p1, '&');
 796         if (path)
 797             path++;
 798     }
 799     return 0;
 800 }
 801
 802 void uri_val_int(const char *path, const char *name, ODR o, int **intp)
 803 {
 804     const char *v = uri_val(path, name, o);
 805     if (v)
 806         *intp = odr_intdup(o, atoi(v));
 807 }
 808
 809 static void process_http_request(association *assoc, request *req)
 810 {
 811     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
 812     ODR o = assoc->encode;
 813     Z_GDU *p = 0;
 814     Z_HTTP_Response *hres = 0;
 815     int keepalive = 1;
 816
 817     if (!strcmp(hreq->method, "GET"))
 818     {
 819         char *charset = 0;
 820         int ret = -1;
 821         Z_SOAP *soap_package = 0;
 822         char *db = "Default";
 823         const char *p0 = hreq->path, *p1;
 824         static Z_SOAP_Handler soap_handlers[2] = {
 825 #if HAVE_XML2
 826             {"http://www.loc.gov/zing/srw/v1.0/", 0,
 827              (Z_SOAP_fun) yaz_srw_codec},
 828 #endif
 829             {0, 0, 0}
 830         };
 831
 832         if (*p0 == '/')
 833             p0++;
 834         p1 = strchr(p0, '?');
 835         if (!p1)
 836             p1 = p0 + strlen(p0);
 837         if (p1 != p0)
 838         {
 839             db = odr_malloc(assoc->decode, p1 - p0 + 1);
 840             memcpy (db, p0, p1 - p0);
 841             db[p1 - p0] = '\0';
 842         }
 843 #if HAVE_XML2
 844         if (p1 && *p1 == '?' && p1[1])
 845         {
 846             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_searchRetrieve_response);
 847             Z_SRW_PDU *sr = yaz_srw_get(o, Z_SRW_searchRetrieve_request);
 848             char *query = uri_val(p1, "query", o);
 849             char *pQuery = uri_val(p1, "pQuery", o);
 850             char *sortKeys = uri_val(p1, "sortKeys", o);
 851
 852             if (query)
 853             {
 854                 sr->u.request->query_type = Z_SRW_query_type_cql;
 855                 sr->u.request->query.cql = query;
 856             }
 857             if (pQuery)
 858             {
 859                 sr->u.request->query_type = Z_SRW_query_type_pqf;
 860                 sr->u.request->query.pqf = pQuery;
 861             }
 862             if (sortKeys)
 863             {
 864                 sr->u.request->sort_type = Z_SRW_sort_type_sort;
 865                 sr->u.request->sort.sortKeys = sortKeys;
 866             }
 867             sr->u.request->recordSchema = uri_val(p1, "recordSchema", o);
 868             sr->u.request->recordPacking = uri_val(p1, "recordPacking", o);
 869             uri_val_int(p1, "maximumRecords", o,
 870                         &sr->u.request->maximumRecords);
 871             uri_val_int(p1, "startRecord", o,
 872                         &sr->u.request->startRecord);
 873             if (sr->u.request->startRecord)
 874                 yaz_log(LOG_LOG, "startRecord=%d", *sr->u.request->startRecord);
 875             sr->u.request->database = db;
 876             srw_bend_search(assoc, req, sr->u.request, res->u.response);
 877
 878             soap_package = odr_malloc(o, sizeof(*soap_package));
 879             soap_package->which = Z_SOAP_generic;
 880
 881             soap_package->u.generic =
 882                 odr_malloc(o, sizeof(*soap_package->u.generic));
 883
 884             soap_package->u.generic->p = res;
 885             soap_package->u.generic->ns = soap_handlers[0].ns;
 886             soap_package->u.generic->no = 0;
 887
 888             soap_package->ns = "SRU";
 889
 890             p = z_get_HTTP_Response(o, 200);
 891             hres = p->u.HTTP_Response;
 892
 893             ret = z_soap_codec_enc(assoc->encode, &soap_package,
 894                                    &hres->content_buf, &hres->content_len,
 895                                    soap_handlers, charset);
 896             if (!charset)
 897                 z_HTTP_header_add(o, &hres->headers, "Content-Type", "text/xml");
 898             else
 899             {
 900                 char ctype[60];
 901                 strcpy(ctype, "text/xml; charset=");
 902                 strcat(ctype, charset);
 903                 z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
 904             }
 905
 906         }
 907         else
 908         {
 909             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
 910             Z_SRW_PDU *sr = yaz_srw_get(o, Z_SRW_explain_request);
 911
 912             srw_bend_explain(assoc, req, sr->u.explain_request,
 913                             res->u.explain_response);
 914
 915             if (res->u.explain_response->explainData_buf)
 916             {
 917                 soap_package = odr_malloc(o, sizeof(*soap_package));
 918                 soap_package->which = Z_SOAP_generic;
 919
 920                 soap_package->u.generic =
 921                     odr_malloc(o, sizeof(*soap_package->u.generic));
 922
 923                 soap_package->u.generic->p = res;
 924                 soap_package->u.generic->ns = soap_handlers[0].ns;
 925                 soap_package->u.generic->no = 0;
 926
 927                 soap_package->ns = "SRU";
 928
 929                 p = z_get_HTTP_Response(o, 200);
 930                 hres = p->u.HTTP_Response;
 931
 932                 ret = z_soap_codec_enc(assoc->encode, &soap_package,
 933                                        &hres->content_buf, &hres->content_len,
 934                                        soap_handlers, charset);
 935                 if (!charset)
 936                     z_HTTP_header_add(o, &hres->headers, "Content-Type", "text/xml");
 937                 else
 938                 {
 939                     char ctype[60];
 940                     strcpy(ctype, "text/xml; charset=");
 941                     strcat(ctype, charset);
 942                     z_HTTP_header_add(o, &hres->headers, "Content-Type",
 943                                       ctype);
 944                 }
 945             }
 946         }
 947 #endif
 948 #ifdef DOCDIR
 949         if (strlen(hreq->path) >= 5 && strlen(hreq->path) < 80 &&
 950                          !memcmp(hreq->path, "/doc/", 5))
 951         {
 952             FILE *f;
 953             char fpath[120];
 954
 955             strcpy(fpath, DOCDIR);
 956             strcat(fpath, hreq->path+4);
 957             f = fopen(fpath, "rb");
 958             if (f) {
 959                 struct stat sbuf;
 960                 if (fstat(fileno(f), &sbuf) || !S_ISREG(sbuf.st_mode))
 961                 {
 962                     fclose(f);
 963                     f = 0;
 964                 }
 965             }
 966             if (f)
 967             {
 968                 long sz;
 969                 fseek(f, 0L, SEEK_END);
 970                 sz = ftell(f);
 971                 if (sz >= 0 && sz < 500000)
 972                 {
 973                     const char *ctype = "application/octet-stream";
 974                     const char *cp;
 975
 976                     p = z_get_HTTP_Response(o, 200);
 977                     hres = p->u.HTTP_Response;
 978                     hres->content_buf = (char *) odr_malloc(o, sz + 1);
 979                     hres->content_len = sz;
 980                     fseek(f, 0L, SEEK_SET);
 981                     fread(hres->content_buf, 1, sz, f);
 982                     if ((cp = strrchr(fpath, '.'))) {
 983                         cp++;
 984                         if (!strcmp(cp, "png"))
 985                             ctype = "image/png";
 986                         else if (!strcmp(cp, "gif"))
 987                             ctype = "image/gif";
 988                         else if (!strcmp(cp, "xml"))
 989                             ctype = "text/xml";
 990                         else if (!strcmp(cp, "html"))
 991                             ctype = "text/html";
 992                     }
 993                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
 994                 }
 995                 fclose(f);
 996             }
 997         }
 998 #endif
 999
1000 #if 0
1001         if (!strcmp(hreq->path, "/"))
1002         {
1003 #ifdef DOCDIR
1004             struct stat sbuf;
1005 #endif
1006             const char *doclink = "";
1007             p = z_get_HTTP_Response(o, 200);
1008             hres = p->u.HTTP_Response;
1009             hres->content_buf = (char *) odr_malloc(o, 400);
1010 #ifdef DOCDIR
1011             if (stat(DOCDIR "/yaz.html", &sbuf) == 0 && S_ISREG(sbuf.st_mode))
1012                 doclink = "<P><A HREF=\"/doc/yaz.html\">Documentation</A></P>";
1013 #endif
1014             sprintf (hres->content_buf,
1015                      "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n"
1016                      "<HTML>\n"
1017                      " <HEAD>\n"
1018                      "  <TITLE>YAZ " YAZ_VERSION "</TITLE>\n"
1019                      " </HEAD>\n"
1020                      " <BODY>\n"
1021                      "  <P><A HREF=\"http://www.indexdata.dk/yaz/\">YAZ</A> "
1022                      YAZ_VERSION "</P>\n"
1023                      "%s"
1024                      " </BODY>\n"
1025                      "</HTML>\n", doclink);
1026             hres->content_len = strlen(hres->content_buf);
1027             z_HTTP_header_add(o, &hres->headers, "Content-Type", "text/html");
1028         }
1029 #endif
1030
1031         if (!p)
1032         {
1033             p = z_get_HTTP_Response(o, 404);
1034         }
1035     }
1036     else if (!strcmp(hreq->method, "POST"))
1037     {
1038         const char *content_type = z_HTTP_header_lookup(hreq->headers,
1039                                                         "Content-Type");
1040         if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
1041         {
1042             Z_SOAP *soap_package = 0;
1043             int ret = -1;
1044             int http_code = 500;
1045             const char *charset_p = 0;
1046             char *charset = 0;
1047
1048             static Z_SOAP_Handler soap_handlers[2] = {
1049 #if HAVE_XML2
1050                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1051                  (Z_SOAP_fun) yaz_srw_codec},
1052 #endif
1053                 {0, 0, 0}
1054             };
1055             if ((charset_p = strstr(content_type, "; charset=")))
1056             {
1057                 int i = 0;
1058                 charset_p += 10;
1059                 while (i < 20 && charset_p[i] &&
1060                        !strchr("; \n\r", charset_p[i]))
1061                     i++;
1062                 charset = odr_malloc(assoc->encode, i+1);
1063                 memcpy(charset, charset_p, i);
1064                 charset[i] = '\0';
1065                 yaz_log(LOG_LOG, "SOAP encoding %s", charset);
1066             }
1067             ret = z_soap_codec(assoc->decode, &soap_package,
1068                                &hreq->content_buf, &hreq->content_len,
1069                                soap_handlers);
1070 #if HAVE_XML2
1071             if (!ret && soap_package->which == Z_SOAP_generic &&
1072                 soap_package->u.generic->no == 0)
1073             {
1074                 /* SRW package */
1075                 Z_SRW_PDU *sr = soap_package->u.generic->p;
1076
1077                 if (sr->which == Z_SRW_searchRetrieve_request)
1078                 {
1079                     Z_SRW_PDU *res =
1080                         yaz_srw_get(assoc->encode,
1081                                     Z_SRW_searchRetrieve_response);
1082
1083                     if (!sr->u.request->database)
1084                     {
1085                         const char *p0 = hreq->path, *p1;
1086                         if (*p0 == '/')
1087                             p0++;
1088                         p1 = strchr(p0, '?');
1089                         if (!p1)
1090                             p1 = p0 + strlen(p0);
1091                         if (p1 != p0)
1092                         {
1093                             sr->u.request->database =
1094                                 odr_malloc(assoc->decode, p1 - p0 + 1);
1095                             memcpy (sr->u.request->database, p0, p1 - p0);
1096                             sr->u.request->database[p1 - p0] = '\0';
1097                         }
1098                         else
1099                             sr->u.request->database = "Default";
1100                     }
1101                     srw_bend_search(assoc, req, sr->u.request,
1102                                     res->u.response);
1103
1104                     soap_package->u.generic->p = res;
1105                     http_code = 200;
1106                 }
1107                 else if (sr->which == Z_SRW_explain_request)
1108                 {
1109                     Z_SRW_PDU *res =
1110                         yaz_srw_get(assoc->encode, Z_SRW_explain_response);
1111
1112                     srw_bend_explain(assoc, req, sr->u.explain_request,
1113                                      res->u.explain_response);
1114                     if (!res->u.explain_response->explainData_buf)
1115                     {
1116                         z_soap_error(assoc->encode, soap_package,
1117                                      "SOAP-ENV:Client", "Explain Not Supported", 0);
1118                     }
1119                     else
1120                     {
1121                         soap_package->u.generic->p = res;
1122                         http_code = 200;
1123                     }
1124                 }
1125                 else
1126                 {
1127                     z_soap_error(assoc->encode, soap_package,
1128                                  "SOAP-ENV:Client", "Bad method", 0);
1129                 }
1130             }
1131 #endif
1132             p = z_get_HTTP_Response(o, 200);
1133             hres = p->u.HTTP_Response;
1134             ret = z_soap_codec_enc(assoc->encode, &soap_package,
1135                                    &hres->content_buf, &hres->content_len,
1136                                    soap_handlers, charset);
1137             hres->code = http_code;
1138             if (!charset)
1139                 z_HTTP_header_add(o, &hres->headers, "Content-Type", "text/xml");
1140             else
1141             {
1142                 char ctype[60];
1143                 strcpy(ctype, "text/xml; charset=");
1144                 strcat(ctype, charset);
1145                 z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1146             }
1147         }
1148         if (!p) /* still no response ? */
1149             p = z_get_HTTP_Response(o, 500);
1150     }
1151     else
1152     {
1153         p = z_get_HTTP_Response(o, 405);
1154         hres = p->u.HTTP_Response;
1155
1156         z_HTTP_header_add(o, &hres->headers, "Allow", "GET, POST");
1157     }
1158     hres = p->u.HTTP_Response;
1159     if (!strcmp(hreq->version, "1.0"))
1160     {
1161         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1162         if (v && !strcmp(v, "Keep-Alive"))
1163             keepalive = 1;
1164         else
1165             keepalive = 0;
1166         hres->version = "1.0";
1167     }
1168     else
1169     {
1170         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1171         if (v && !strcmp(v, "close"))
1172             keepalive = 0;
1173         else
1174             keepalive = 1;
1175         hres->version = "1.1";
1176     }
1177     if (!keepalive)
1178     {
1179         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1180         assoc->state = ASSOC_DEAD;
1181     }
1182     else
1183     {
1184         int t;
1185         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1186
1187         if (alive && isdigit(*alive))
1188             t = atoi(alive);
1189         else
1190             t = 15;
1191         if (t < 0 || t > 3600)
1192             t = 3600;
1193         iochan_settimeout(assoc->client_chan,t);
1194         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1195     }
1196     process_gdu_response(assoc, req, p);
1197 }
1198
1199 static void process_gdu_request(association *assoc, request *req)
1200 {
1201     if (req->gdu_request->which == Z_GDU_Z3950)
1202     {
1203         char *msg = 0;
1204         req->apdu_request = req->gdu_request->u.z3950;
1205         if (process_z_request(assoc, req, &msg) < 0)
1206             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1207     }
1208     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1209         process_http_request(assoc, req);
1210     else
1211     {
1212         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1213     }
1214 }
1215
1216 /*
1217  * Initiate request processing.
1218  */
1219 static int process_z_request(association *assoc, request *req, char **msg)
1220 {
1221     int fd = -1;
1222     Z_APDU *res;
1223     int retval;
1224
1225     *msg = "Unknown Error";
1226     assert(req && req->state == REQUEST_IDLE);
1227     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1228     {
1229         *msg = "Missing InitRequest";
1230         return -1;
1231     }
1232     switch (req->apdu_request->which)
1233     {
1234     case Z_APDU_initRequest:
1235         iochan_settimeout(assoc->client_chan,
1236                           statserv_getcontrol()->idle_timeout * 60);
1237         res = process_initRequest(assoc, req); break;
1238     case Z_APDU_searchRequest:
1239         res = process_searchRequest(assoc, req, &fd); break;
1240     case Z_APDU_presentRequest:
1241         res = process_presentRequest(assoc, req, &fd); break;
1242     case Z_APDU_scanRequest:
1243         if (assoc->init->bend_scan)
1244             res = process_scanRequest(assoc, req, &fd);
1245         else
1246         {
1247             *msg = "Cannot handle Scan APDU";
1248             return -1;
1249         }
1250         break;
1251     case Z_APDU_extendedServicesRequest:
1252         if (assoc->init->bend_esrequest)
1253             res = process_ESRequest(assoc, req, &fd);
1254         else
1255         {
1256             *msg = "Cannot handle Extended Services APDU";
1257             return -1;
1258         }
1259         break;
1260     case Z_APDU_sortRequest:
1261         if (assoc->init->bend_sort)
1262             res = process_sortRequest(assoc, req, &fd);
1263         else
1264         {
1265             *msg = "Cannot handle Sort APDU";
1266             return -1;
1267         }
1268         break;
1269     case Z_APDU_close:
1270         process_close(assoc, req);
1271         return 0;
1272     case Z_APDU_deleteResultSetRequest:
1273         if (assoc->init->bend_delete)
1274             res = process_deleteRequest(assoc, req, &fd);
1275         else
1276         {
1277             *msg = "Cannot handle Delete APDU";
1278             return -1;
1279         }
1280         break;
1281     case Z_APDU_segmentRequest:
1282         if (assoc->init->bend_segment)
1283         {
1284             res = process_segmentRequest (assoc, req);
1285         }
1286         else
1287         {
1288             *msg = "Cannot handle Segment APDU";
1289             return -1;
1290         }
1291         break;
1292     default:
1293         *msg = "Bad APDU received";
1294         return -1;
1295     }
1296     if (res)
1297     {
1298         yaz_log(LOG_DEBUG, "  result immediately available");
1299         retval = process_z_response(assoc, req, res);
1300     }
1301     else if (fd < 0)
1302     {
1303         yaz_log(LOG_DEBUG, "  result unavailble");
1304         retval = 0;
1305     }
1306     else /* no result yet - one will be provided later */
1307     {
1308         IOCHAN chan;
1309
1310         /* Set up an I/O handler for the fd supplied by the backend */
1311
1312         yaz_log(LOG_DEBUG, "   establishing handler for result");
1313         req->state = REQUEST_PENDING;
1314         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
1315             abort();
1316         iochan_setdata(chan, assoc);
1317         retval = 0;
1318     }
1319     return retval;
1320 }
1321
1322 /*
1323  * Handle message from the backend.
1324  */
1325 void backend_response(IOCHAN i, int event)
1326 {
1327     association *assoc = (association *)iochan_getdata(i);
1328     request *req = request_head(&assoc->incoming);
1329     Z_APDU *res;
1330     int fd;
1331
1332     yaz_log(LOG_DEBUG, "backend_response");
1333     assert(assoc && req && req->state != REQUEST_IDLE);
1334     /* determine what it is we're waiting for */
1335     switch (req->apdu_request->which)
1336     {
1337         case Z_APDU_searchRequest:
1338             res = response_searchRequest(assoc, req, 0, &fd); break;
1339 #if 0
1340         case Z_APDU_presentRequest:
1341             res = response_presentRequest(assoc, req, 0, &fd); break;
1342         case Z_APDU_scanRequest:
1343             res = response_scanRequest(assoc, req, 0, &fd); break;
1344 #endif
1345         default:
1346             yaz_log(LOG_WARN, "Serious programmer's lapse or bug");
1347             abort();
1348     }
1349     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
1350     {
1351         yaz_log(LOG_LOG, "Fatal error when talking to backend");
1352         do_close(assoc, Z_Close_systemProblem, 0);
1353         iochan_destroy(i);
1354         return;
1355     }
1356     else if (!res) /* no result yet - try again later */
1357     {
1358         yaz_log(LOG_DEBUG, "   no result yet");
1359         iochan_setfd(i, fd); /* in case fd has changed */
1360     }
1361 }
1362
1363 /*
1364  * Encode response, and transfer the request structure to the outgoing queue.
1365  */
1366 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
1367 {
1368     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
1369
1370     if (assoc->print && !z_GDU(assoc->print, &res, 0, 0))
1371     {
1372         yaz_log(LOG_WARN, "ODR print error: %s",
1373             odr_errmsg(odr_geterror(assoc->print)));
1374         odr_reset(assoc->print);
1375     }
1376     if (!z_GDU(assoc->encode, &res, 0, 0))
1377     {
1378         yaz_log(LOG_WARN, "ODR error when encoding response: %s",
1379             odr_errmsg(odr_geterror(assoc->decode)));
1380         return -1;
1381     }
1382     req->response = odr_getbuf(assoc->encode, &req->len_response,
1383         &req->size_response);
1384     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
1385     odr_reset(assoc->encode);
1386     req->state = REQUEST_IDLE;
1387     request_enq(&assoc->outgoing, req);
1388     /* turn the work over to the ir_session handler */
1389     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
1390     assoc->cs_put_mask = EVENT_OUTPUT;
1391     /* Is there more work to be done? give that to the input handler too */
1392 #if 1
1393     if (request_head(&assoc->incoming))
1394     {
1395         yaz_log (LOG_DEBUG, "more work to be done");
1396         iochan_setevent(assoc->client_chan, EVENT_WORK);
1397     }
1398 #endif
1399     return 0;
1400 }
1401
1402 /*
1403  * Encode response, and transfer the request structure to the outgoing queue.
1404  */
1405 static int process_z_response(association *assoc, request *req, Z_APDU *res)
1406 {
1407     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
1408     gres->which = Z_GDU_Z3950;
1409     gres->u.z3950 = res;
1410
1411     return process_gdu_response(assoc, req, gres);
1412 }
1413
1414
1415 /*
1416  * Handle init request.
1417  * At the moment, we don't check the options
1418  * anywhere else in the code - we just try not to do anything that would
1419  * break a naive client. We'll toss 'em into the association block when
1420  * we need them there.
1421  */
1422 static Z_APDU *process_initRequest(association *assoc, request *reqb)
1423 {
1424     statserv_options_block *cb = statserv_getcontrol();
1425     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
1426     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
1427     Z_InitResponse *resp = apdu->u.initResponse;
1428     bend_initresult *binitres;
1429
1430     char options[140];
1431
1432     yaz_log(LOG_LOG, "Got initRequest");
1433     if (req->implementationId)
1434         yaz_log(LOG_LOG, "Id:        %s", req->implementationId);
1435     if (req->implementationName)
1436         yaz_log(LOG_LOG, "Name:      %s", req->implementationName);
1437     if (req->implementationVersion)
1438         yaz_log(LOG_LOG, "Version:   %s", req->implementationVersion);
1439
1440     assoc_init_reset(assoc);
1441
1442     assoc->init->auth = req->idAuthentication;
1443     assoc->init->referenceId = req->referenceId;
1444
1445     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
1446     {
1447         Z_CharSetandLanguageNegotiation *negotiation =
1448             yaz_get_charneg_record (req->otherInfo);
1449         if (negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
1450             assoc->init->charneg_request = negotiation;
1451     }
1452
1453     if (!(binitres = (*cb->bend_init)(assoc->init)))
1454     {
1455         yaz_log(LOG_WARN, "Bad response from backend.");
1456         return 0;
1457     }
1458
1459     assoc->backend = binitres->handle;
1460     if ((assoc->init->bend_sort))
1461         yaz_log (LOG_DEBUG, "Sort handler installed");
1462     if ((assoc->init->bend_search))
1463         yaz_log (LOG_DEBUG, "Search handler installed");
1464     if ((assoc->init->bend_present))
1465         yaz_log (LOG_DEBUG, "Present handler installed");
1466     if ((assoc->init->bend_esrequest))
1467         yaz_log (LOG_DEBUG, "ESRequest handler installed");
1468     if ((assoc->init->bend_delete))
1469         yaz_log (LOG_DEBUG, "Delete handler installed");
1470     if ((assoc->init->bend_scan))
1471         yaz_log (LOG_DEBUG, "Scan handler installed");
1472     if ((assoc->init->bend_segment))
1473         yaz_log (LOG_DEBUG, "Segment handler installed");
1474
1475     resp->referenceId = req->referenceId;
1476     *options = '\0';
1477     /* let's tell the client what we can do */
1478     if (ODR_MASK_GET(req->options, Z_Options_search))
1479     {
1480         ODR_MASK_SET(resp->options, Z_Options_search);
1481         strcat(options, "srch");
1482     }
1483     if (ODR_MASK_GET(req->options, Z_Options_present))
1484     {
1485         ODR_MASK_SET(resp->options, Z_Options_present);
1486         strcat(options, " prst");
1487     }
1488     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
1489         assoc->init->bend_delete)
1490     {
1491         ODR_MASK_SET(resp->options, Z_Options_delSet);
1492         strcat(options, " del");
1493     }
1494     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
1495         assoc->init->bend_esrequest)
1496     {
1497         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
1498         strcat (options, " extendedServices");
1499     }
1500     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
1501     {
1502         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
1503         strcat(options, " namedresults");
1504     }
1505     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
1506     {
1507         ODR_MASK_SET(resp->options, Z_Options_scan);
1508         strcat(options, " scan");
1509     }
1510     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
1511     {
1512         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
1513         strcat(options, " concurrop");
1514     }
1515     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
1516     {
1517         ODR_MASK_SET(resp->options, Z_Options_sort);
1518         strcat(options, " sort");
1519     }
1520
1521     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
1522         && assoc->init->charneg_response)
1523     {
1524         Z_OtherInformation **p;
1525         Z_OtherInformationUnit *p0;
1526
1527         yaz_oi_APDU(apdu, &p);
1528
1529         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
1530             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
1531
1532             p0->which = Z_OtherInfo_externallyDefinedInfo;
1533             p0->information.externallyDefinedInfo =
1534                 assoc->init->charneg_response;
1535         }
1536         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
1537         strcat(options, " negotiation");
1538     }
1539
1540     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
1541     {
1542         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
1543         assoc->version = 2; /* 1 & 2 are equivalent */
1544     }
1545     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
1546     {
1547         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
1548         assoc->version = 2;
1549     }
1550     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
1551     {
1552         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
1553         assoc->version = 3;
1554     }
1555
1556     yaz_log(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
1557     assoc->maximumRecordSize = *req->maximumRecordSize;
1558     if (assoc->maximumRecordSize > control_block->maxrecordsize)
1559         assoc->maximumRecordSize = control_block->maxrecordsize;
1560     assoc->preferredMessageSize = *req->preferredMessageSize;
1561     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
1562         assoc->preferredMessageSize = assoc->maximumRecordSize;
1563
1564     resp->preferredMessageSize = &assoc->preferredMessageSize;
1565     resp->maximumRecordSize = &assoc->maximumRecordSize;
1566
1567     resp->implementationName = "GFS/YAZ";
1568
1569     if (assoc->init->implementation_id)
1570     {
1571         char *nv = (char *)
1572             odr_malloc (assoc->encode,
1573                         strlen(assoc->init->implementation_id) + 10 +
1574                                strlen(resp->implementationId));
1575         sprintf (nv, "%s / %s",
1576                  resp->implementationId, assoc->init->implementation_id);
1577         resp->implementationId = nv;
1578     }
1579     if (assoc->init->implementation_name)
1580     {
1581         char *nv = (char *)
1582             odr_malloc (assoc->encode,
1583                         strlen(assoc->init->implementation_name) + 10 +
1584                                strlen(resp->implementationName));
1585         sprintf (nv, "%s / %s",
1586                  resp->implementationName, assoc->init->implementation_name);
1587         resp->implementationName = nv;
1588     }
1589     if (assoc->init->implementation_version)
1590     {
1591         char *nv = (char *)
1592             odr_malloc (assoc->encode,
1593                         strlen(assoc->init->implementation_version) + 10 +
1594                                strlen(resp->implementationVersion));
1595         sprintf (nv, "YAZ %s / %s",
1596                  resp->implementationVersion,
1597                  assoc->init->implementation_version);
1598         resp->implementationVersion = nv;
1599     }
1600
1601     if (binitres->errcode)
1602     {
1603         yaz_log(LOG_LOG, "Connection rejected by backend.");
1604         *resp->result = 0;
1605         assoc->state = ASSOC_DEAD;
1606     }
1607     else
1608         assoc->state = ASSOC_UP;
1609     return apdu;
1610 }
1611
1612 /*
1613  * These functions should be merged.
1614  */
1615
1616 static void set_addinfo (Z_DefaultDiagFormat *dr, char *addinfo, ODR odr)
1617 {
1618     dr->which = Z_DefaultDiagFormat_v2Addinfo;
1619     dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
1620 }
1621
1622 /*
1623  * nonsurrogate diagnostic record.
1624  */
1625 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
1626 {
1627     Z_Records *rec = (Z_Records *)
1628         odr_malloc (assoc->encode, sizeof(*rec));
1629     int *err = odr_intdup(assoc->encode, error);
1630     Z_DiagRec *drec = (Z_DiagRec *)
1631         odr_malloc (assoc->encode, sizeof(*drec));
1632     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1633         odr_malloc (assoc->encode, sizeof(*dr));
1634
1635     yaz_log(LOG_LOG, "[%d] %s %s%s", error, diagbib1_str(error),
1636         addinfo ? " -- " : "", addinfo ? addinfo : "");
1637     rec->which = Z_Records_NSD;
1638     rec->u.nonSurrogateDiagnostic = dr;
1639     dr->diagnosticSetId =
1640         yaz_oidval_to_z3950oid (assoc->encode, CLASS_DIAGSET, VAL_BIB1);
1641     dr->condition = err;
1642     set_addinfo (dr, addinfo, assoc->encode);
1643     return rec;
1644 }
1645
1646 /*
1647  * surrogate diagnostic.
1648  */
1649 static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname,
1650                                           int error, char *addinfo)
1651 {
1652     Z_NamePlusRecord *rec = (Z_NamePlusRecord *)
1653         odr_malloc (assoc->encode, sizeof(*rec));
1654     int *err = odr_intdup(assoc->encode, error);
1655     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
1656     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1657         odr_malloc (assoc->encode, sizeof(*dr));
1658
1659     yaz_log(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
1660     rec->databaseName = dbname;
1661     rec->which = Z_NamePlusRecord_surrogateDiagnostic;
1662     rec->u.surrogateDiagnostic = drec;
1663     drec->which = Z_DiagRec_defaultFormat;
1664     drec->u.defaultFormat = dr;
1665     dr->diagnosticSetId =
1666         yaz_oidval_to_z3950oid (assoc->encode, CLASS_DIAGSET, VAL_BIB1);
1667     dr->condition = err;
1668     set_addinfo (dr, addinfo, assoc->encode);
1669
1670     return rec;
1671 }
1672
1673 /*
1674  * multiple nonsurrogate diagnostics.
1675  */
1676 static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo)
1677 {
1678     Z_DiagRecs *recs = (Z_DiagRecs *)odr_malloc (assoc->encode, sizeof(*recs));
1679     int *err = odr_intdup(assoc->encode, error);
1680     Z_DiagRec **recp = (Z_DiagRec **)odr_malloc (assoc->encode, sizeof(*recp));
1681     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
1682     Z_DefaultDiagFormat *rec = (Z_DefaultDiagFormat *)
1683         odr_malloc (assoc->encode, sizeof(*rec));
1684
1685     yaz_log(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo ? addinfo : "");
1686
1687     recs->num_diagRecs = 1;
1688     recs->diagRecs = recp;
1689     recp[0] = drec;
1690     drec->which = Z_DiagRec_defaultFormat;
1691     drec->u.defaultFormat = rec;
1692
1693     rec->diagnosticSetId =
1694         yaz_oidval_to_z3950oid (assoc->encode, CLASS_DIAGSET, VAL_BIB1);
1695     rec->condition = err;
1696
1697     rec->which = Z_DefaultDiagFormat_v2Addinfo;
1698     rec->u.v2Addinfo = odr_strdup (assoc->encode, addinfo ? addinfo : "");
1699     return recs;
1700 }
1701
1702 static Z_Records *pack_records(association *a, char *setname, int start,
1703                                int *num, Z_RecordComposition *comp,
1704                                int *next, int *pres, oid_value format,
1705                                Z_ReferenceId *referenceId,
1706                                int *oid)
1707 {
1708     int recno, total_length = 0, toget = *num, dumped_records = 0;
1709     Z_Records *records =
1710         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
1711     Z_NamePlusRecordList *reclist =
1712         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
1713     Z_NamePlusRecord **list =
1714         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
1715
1716     records->which = Z_Records_DBOSD;
1717     records->u.databaseOrSurDiagnostics = reclist;
1718     reclist->num_records = 0;
1719     reclist->records = list;
1720     *pres = Z_PRES_SUCCESS;
1721     *num = 0;
1722     *next = 0;
1723
1724     yaz_log(LOG_LOG, "Request to pack %d+%d+%s", start, toget, setname);
1725     yaz_log(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
1726         a->maximumRecordSize);
1727     for (recno = start; reclist->num_records < toget; recno++)
1728     {
1729         bend_fetch_rr freq;
1730         Z_NamePlusRecord *thisrec;
1731         int this_length = 0;
1732         /*
1733          * we get the number of bytes allocated on the stream before any
1734          * allocation done by the backend - this should give us a reasonable
1735          * idea of the total size of the data so far.
1736          */
1737         total_length = odr_total(a->encode) - dumped_records;
1738         freq.errcode = 0;
1739         freq.errstring = 0;
1740         freq.basename = 0;
1741         freq.len = 0;
1742         freq.record = 0;
1743         freq.last_in_set = 0;
1744         freq.setname = setname;
1745         freq.surrogate_flag = 0;
1746         freq.number = recno;
1747         freq.comp = comp;
1748         freq.request_format = format;
1749         freq.request_format_raw = oid;
1750         freq.output_format = format;
1751         freq.output_format_raw = 0;
1752         freq.stream = a->encode;
1753         freq.print = a->print;
1754         freq.surrogate_flag = 0;
1755         freq.referenceId = referenceId;
1756         (*a->init->bend_fetch)(a->backend, &freq);
1757         /* backend should be able to signal whether error is system-wide
1758            or only pertaining to current record */
1759         if (freq.errcode)
1760         {
1761             if (!freq.surrogate_flag)
1762             {
1763                 char s[20];
1764                 *pres = Z_PRES_FAILURE;
1765                 /* for 'present request out of range',
1766                    set addinfo to record position if not set */
1767                 if (freq.errcode == 13 && freq.errstring == 0)
1768                 {
1769                     sprintf (s, "%d", recno);
1770                     freq.errstring = s;
1771                 }
1772                 return diagrec(a, freq.errcode, freq.errstring);
1773             }
1774             reclist->records[reclist->num_records] =
1775                 surrogatediagrec(a, freq.basename, freq.errcode,
1776                                  freq.errstring);
1777             reclist->num_records++;
1778             *next = freq.last_in_set ? 0 : recno + 1;
1779             continue;
1780         }
1781         if (freq.len >= 0)
1782             this_length = freq.len;
1783         else
1784             this_length = odr_total(a->encode) - total_length;
1785         yaz_log(LOG_DEBUG, "  fetched record, len=%d, total=%d",
1786             this_length, total_length);
1787         if (this_length + total_length > a->preferredMessageSize)
1788         {
1789             /* record is small enough, really */
1790             if (this_length <= a->preferredMessageSize)
1791             {
1792                 yaz_log(LOG_DEBUG, "  Dropped last normal-sized record");
1793                 *pres = Z_PRES_PARTIAL_2;
1794                 break;
1795             }
1796             /* record can only be fetched by itself */
1797             if (this_length < a->maximumRecordSize)
1798             {
1799                 yaz_log(LOG_DEBUG, "  Record > prefmsgsz");
1800                 if (toget > 1)
1801                 {
1802                     yaz_log(LOG_DEBUG, "  Dropped it");
1803                     reclist->records[reclist->num_records] =
1804                          surrogatediagrec(a, freq.basename, 16, 0);
1805                     reclist->num_records++;
1806                     *next = freq.last_in_set ? 0 : recno + 1;
1807                     dumped_records += this_length;
1808                     continue;
1809                 }
1810             }
1811             else /* too big entirely */
1812             {
1813                 yaz_log(LOG_LOG, "Record > maxrcdsz this=%d max=%d", this_length, a->maximumRecordSize);
1814                 reclist->records[reclist->num_records] =
1815                     surrogatediagrec(a, freq.basename, 17, 0);
1816                 reclist->num_records++;
1817                 *next = freq.last_in_set ? 0 : recno + 1;
1818                 dumped_records += this_length;
1819                 continue;
1820             }
1821         }
1822
1823         if (!(thisrec = (Z_NamePlusRecord *)
1824               odr_malloc(a->encode, sizeof(*thisrec))))
1825             return 0;
1826         if (!(thisrec->databaseName = (char *)odr_malloc(a->encode,
1827             strlen(freq.basename) + 1)))
1828             return 0;
1829         strcpy(thisrec->databaseName, freq.basename);
1830         thisrec->which = Z_NamePlusRecord_databaseRecord;
1831
1832         if (freq.output_format_raw)
1833         {
1834             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
1835             freq.output_format = ident->value;
1836         }
1837         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
1838                                                  freq.record, freq.len);
1839         if (!thisrec->u.databaseRecord)
1840             return 0;
1841         reclist->records[reclist->num_records] = thisrec;
1842         reclist->num_records++;
1843         *next = freq.last_in_set ? 0 : recno + 1;
1844     }
1845     *num = reclist->num_records;
1846     return records;
1847 }
1848
1849 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
1850     int *fd)
1851 {
1852     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
1853     bend_search_rr *bsrr =
1854         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
1855
1856     yaz_log(LOG_LOG, "Got SearchRequest.");
1857     bsrr->fd = fd;
1858     bsrr->request = reqb;
1859     bsrr->association = assoc;
1860     bsrr->referenceId = req->referenceId;
1861     save_referenceId (reqb, bsrr->referenceId);
1862
1863     yaz_log (LOG_LOG, "ResultSet '%s'", req->resultSetName);
1864     if (req->databaseNames)
1865     {
1866         int i;
1867         for (i = 0; i < req->num_databaseNames; i++)
1868             yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1869     }
1870     yaz_log_zquery(req->query);
1871
1872     if (assoc->init->bend_search)
1873     {
1874         bsrr->setname = req->resultSetName;
1875         bsrr->replace_set = *req->replaceIndicator;
1876         bsrr->num_bases = req->num_databaseNames;
1877         bsrr->basenames = req->databaseNames;
1878         bsrr->query = req->query;
1879         bsrr->stream = assoc->encode;
1880         bsrr->decode = assoc->decode;
1881         bsrr->print = assoc->print;
1882         bsrr->errcode = 0;
1883         bsrr->hits = 0;
1884         bsrr->errstring = NULL;
1885         bsrr->search_info = NULL;
1886         (assoc->init->bend_search)(assoc->backend, bsrr);
1887         if (!bsrr->request)
1888             return 0;
1889     }
1890     return response_searchRequest(assoc, reqb, bsrr, fd);
1891 }
1892
1893 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
1894
1895 /*
1896  * Prepare a searchresponse based on the backend results. We probably want
1897  * to look at making the fetching of records nonblocking as well, but
1898  * so far, we'll keep things simple.
1899  * If bsrt is null, that means we're called in response to a communications
1900  * event, and we'll have to get the response for ourselves.
1901  */
1902 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
1903     bend_search_rr *bsrt, int *fd)
1904 {
1905     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
1906     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1907     Z_SearchResponse *resp = (Z_SearchResponse *)
1908         odr_malloc (assoc->encode, sizeof(*resp));
1909     int *nulint = odr_intdup (assoc->encode, 0);
1910     bool_t *sr = odr_intdup(assoc->encode, 1);
1911     int *next = odr_intdup(assoc->encode, 0);
1912     int *none = odr_intdup(assoc->encode, Z_RES_NONE);
1913
1914     apdu->which = Z_APDU_searchResponse;
1915     apdu->u.searchResponse = resp;
1916     resp->referenceId = req->referenceId;
1917     resp->additionalSearchInfo = 0;
1918     resp->otherInfo = 0;
1919     *fd = -1;
1920     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
1921     {
1922         yaz_log(LOG_FATAL, "Bad result from backend");
1923         return 0;
1924     }
1925     else if (bsrt->errcode)
1926     {
1927         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
1928         resp->resultCount = nulint;
1929         resp->numberOfRecordsReturned = nulint;
1930         resp->nextResultSetPosition = nulint;
1931         resp->searchStatus = nulint;
1932         resp->resultSetStatus = none;
1933         resp->presentStatus = 0;
1934     }
1935     else
1936     {
1937         int *toget = odr_intdup(assoc->encode, 0);
1938         int *presst = odr_intdup(assoc->encode, 0);
1939         Z_RecordComposition comp, *compp = 0;
1940
1941         yaz_log (LOG_LOG, "resultCount: %d", bsrt->hits);
1942
1943         resp->records = 0;
1944         resp->resultCount = &bsrt->hits;
1945
1946         comp.which = Z_RecordComp_simple;
1947         /* how many records does the user agent want, then? */
1948         if (bsrt->hits <= *req->smallSetUpperBound)
1949         {
1950             *toget = bsrt->hits;
1951             if ((comp.u.simple = req->smallSetElementSetNames))
1952                 compp = &comp;
1953         }
1954         else if (bsrt->hits < *req->largeSetLowerBound)
1955         {
1956             *toget = *req->mediumSetPresentNumber;
1957             if (*toget > bsrt->hits)
1958                 *toget = bsrt->hits;
1959             if ((comp.u.simple = req->mediumSetElementSetNames))
1960                 compp = &comp;
1961         }
1962         else
1963             *toget = 0;
1964
1965         if (*toget && !resp->records)
1966         {
1967             oident *prefformat;
1968             oid_value form;
1969
1970             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
1971                 form = VAL_NONE;
1972             else
1973                 form = prefformat->value;
1974             resp->records = pack_records(assoc, req->resultSetName, 1,
1975                 toget, compp, next, presst, form, req->referenceId,
1976                                          req->preferredRecordSyntax);
1977             if (!resp->records)
1978                 return 0;
1979             resp->numberOfRecordsReturned = toget;
1980             resp->nextResultSetPosition = next;
1981             resp->searchStatus = sr;
1982             resp->resultSetStatus = 0;
1983             resp->presentStatus = presst;
1984         }
1985         else
1986         {
1987             if (*resp->resultCount)
1988                 *next = 1;
1989             resp->numberOfRecordsReturned = nulint;
1990             resp->nextResultSetPosition = next;
1991             resp->searchStatus = sr;
1992             resp->resultSetStatus = 0;
1993             resp->presentStatus = 0;
1994         }
1995     }
1996     resp->additionalSearchInfo = bsrt->search_info;
1997     return apdu;
1998 }
1999
2000 /*
2001  * Maybe we got a little over-friendly when we designed bend_fetch to
2002  * get only one record at a time. Some backends can optimise multiple-record
2003  * fetches, and at any rate, there is some overhead involved in
2004  * all that selecting and hopping around. Problem is, of course, that the
2005  * frontend can't know ahead of time how many records it'll need to
2006  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2007  * is downright lousy as a bulk data transfer protocol.
2008  *
2009  * To start with, we'll do the fetching of records from the backend
2010  * in one operation: To save some trips in and out of the event-handler,
2011  * and to simplify the interface to pack_records. At any rate, asynch
2012  * operation is more fun in operations that have an unpredictable execution
2013  * speed - which is normally more true for search than for present.
2014  */
2015 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2016                                       int *fd)
2017 {
2018     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2019     oident *prefformat;
2020     oid_value form;
2021     Z_APDU *apdu;
2022     Z_PresentResponse *resp;
2023     int *next;
2024     int *num;
2025
2026     yaz_log(LOG_LOG, "Got PresentRequest.");
2027
2028     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2029         form = VAL_NONE;
2030     else
2031         form = prefformat->value;
2032     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2033     resp->records = 0;
2034     resp->presentStatus = odr_intdup(assoc->encode, 0);
2035     if (assoc->init->bend_present)
2036     {
2037         bend_present_rr *bprr = (bend_present_rr *)
2038             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2039         bprr->setname = req->resultSetId;
2040         bprr->start = *req->resultSetStartPoint;
2041         bprr->number = *req->numberOfRecordsRequested;
2042         bprr->format = form;
2043         bprr->comp = req->recordComposition;
2044         bprr->referenceId = req->referenceId;
2045         bprr->stream = assoc->encode;
2046         bprr->print = assoc->print;
2047         bprr->request = reqb;
2048         bprr->association = assoc;
2049         bprr->errcode = 0;
2050         bprr->errstring = NULL;
2051         (*assoc->init->bend_present)(assoc->backend, bprr);
2052
2053         if (!bprr->request)
2054             return 0;
2055         if (bprr->errcode)
2056         {
2057             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2058             *resp->presentStatus = Z_PRES_FAILURE;
2059         }
2060     }
2061     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2062     next = odr_intdup(assoc->encode, 0);
2063     num = odr_intdup(assoc->encode, 0);
2064
2065     apdu->which = Z_APDU_presentResponse;
2066     apdu->u.presentResponse = resp;
2067     resp->referenceId = req->referenceId;
2068     resp->otherInfo = 0;
2069
2070     if (!resp->records)
2071     {
2072         *num = *req->numberOfRecordsRequested;
2073         resp->records =
2074             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2075                      num, req->recordComposition, next, resp->presentStatus,
2076                          form, req->referenceId, req->preferredRecordSyntax);
2077     }
2078     if (!resp->records)
2079         return 0;
2080     resp->numberOfRecordsReturned = num;
2081     resp->nextResultSetPosition = next;
2082
2083     return apdu;
2084 }
2085
2086 /*
2087  * Scan was implemented rather in a hurry, and with support for only the basic
2088  * elements of the service in the backend API. Suggestions are welcome.
2089  */
2090 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2091 {
2092     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2093     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2094     Z_ScanResponse *res = (Z_ScanResponse *)
2095         odr_malloc (assoc->encode, sizeof(*res));
2096     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2097     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2098     Z_ListEntries *ents = (Z_ListEntries *)
2099         odr_malloc (assoc->encode, sizeof(*ents));
2100     Z_DiagRecs *diagrecs_p = NULL;
2101     oident *attset;
2102     bend_scan_rr *bsrr = (bend_scan_rr *)
2103         odr_malloc (assoc->encode, sizeof(*bsrr));
2104
2105     yaz_log(LOG_LOG, "Got ScanRequest");
2106
2107     apdu->which = Z_APDU_scanResponse;
2108     apdu->u.scanResponse = res;
2109     res->referenceId = req->referenceId;
2110
2111     /* if step is absent, set it to 0 */
2112     res->stepSize = odr_intdup(assoc->encode, 0);
2113     if (req->stepSize)
2114         *res->stepSize = *req->stepSize;
2115
2116     res->scanStatus = scanStatus;
2117     res->numberOfEntriesReturned = numberOfEntriesReturned;
2118     res->positionOfTerm = 0;
2119     res->entries = ents;
2120     ents->num_entries = 0;
2121     ents->entries = NULL;
2122     ents->num_nonsurrogateDiagnostics = 0;
2123     ents->nonsurrogateDiagnostics = NULL;
2124     res->attributeSet = 0;
2125     res->otherInfo = 0;
2126
2127     if (req->databaseNames)
2128     {
2129         int i;
2130         for (i = 0; i < req->num_databaseNames; i++)
2131             yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
2132     }
2133     bsrr->num_bases = req->num_databaseNames;
2134     bsrr->basenames = req->databaseNames;
2135     bsrr->num_entries = *req->numberOfTermsRequested;
2136     bsrr->term = req->termListAndStartPoint;
2137     bsrr->referenceId = req->referenceId;
2138     bsrr->stream = assoc->encode;
2139     bsrr->print = assoc->print;
2140     bsrr->step_size = res->stepSize;
2141     if (req->attributeSet &&
2142         (attset = oid_getentbyoid(req->attributeSet)) &&
2143         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
2144         bsrr->attributeset = attset->value;
2145     else
2146         bsrr->attributeset = VAL_NONE;
2147     log_scan_term (req->termListAndStartPoint, bsrr->attributeset);
2148     bsrr->term_position = req->preferredPositionInResponse ?
2149         *req->preferredPositionInResponse : 1;
2150     ((int (*)(void *, bend_scan_rr *))
2151      (*assoc->init->bend_scan))(assoc->backend, bsrr);
2152     if (bsrr->errcode)
2153         diagrecs_p = diagrecs(assoc, bsrr->errcode, bsrr->errstring);
2154     else
2155     {
2156         int i;
2157         Z_Entry **tab = (Z_Entry **)
2158             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
2159
2160         if (bsrr->status == BEND_SCAN_PARTIAL)
2161             *scanStatus = Z_Scan_partial_5;
2162         else
2163             *scanStatus = Z_Scan_success;
2164         ents->entries = tab;
2165         ents->num_entries = bsrr->num_entries;
2166         res->numberOfEntriesReturned = &ents->num_entries;
2167         res->positionOfTerm = &bsrr->term_position;
2168         for (i = 0; i < bsrr->num_entries; i++)
2169         {
2170             Z_Entry *e;
2171             Z_TermInfo *t;
2172             Odr_oct *o;
2173
2174             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
2175             if (bsrr->entries[i].occurrences >= 0)
2176             {
2177                 e->which = Z_Entry_termInfo;
2178                 e->u.termInfo = t = (Z_TermInfo *)
2179                     odr_malloc(assoc->encode, sizeof(*t));
2180                 t->suggestedAttributes = 0;
2181                 t->displayTerm = 0;
2182                 t->alternativeTerm = 0;
2183                 t->byAttributes = 0;
2184                 t->otherTermInfo = 0;
2185                 t->globalOccurrences = &bsrr->entries[i].occurrences;
2186                 t->term = (Z_Term *)
2187                     odr_malloc(assoc->encode, sizeof(*t->term));
2188                 t->term->which = Z_Term_general;
2189                 t->term->u.general = o =
2190                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
2191                 o->buf = (unsigned char *)
2192                     odr_malloc(assoc->encode, o->len = o->size =
2193                                strlen(bsrr->entries[i].term));
2194                 memcpy(o->buf, bsrr->entries[i].term, o->len);
2195                 yaz_log(LOG_DEBUG, "  term #%d: '%s' (%d)", i,
2196                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
2197             }
2198             else
2199             {
2200                 Z_DiagRecs *drecs = diagrecs (assoc,
2201                                               bsrr->entries[i].errcode,
2202                                               bsrr->entries[i].errstring);
2203                 assert (drecs->num_diagRecs == 1);
2204                 e->which = Z_Entry_surrogateDiagnostic;
2205                 assert (drecs->diagRecs[0]);
2206                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
2207             }
2208         }
2209     }
2210     if (diagrecs_p)
2211     {
2212         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
2213         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
2214     }
2215     return apdu;
2216 }
2217
2218 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
2219     int *fd)
2220 {
2221     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
2222     Z_SortResponse *res = (Z_SortResponse *)
2223         odr_malloc (assoc->encode, sizeof(*res));
2224     bend_sort_rr *bsrr = (bend_sort_rr *)
2225         odr_malloc (assoc->encode, sizeof(*bsrr));
2226
2227     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2228
2229     yaz_log(LOG_LOG, "Got SortRequest.");
2230
2231     bsrr->num_input_setnames = req->num_inputResultSetNames;
2232     bsrr->input_setnames = req->inputResultSetNames;
2233     bsrr->referenceId = req->referenceId;
2234     bsrr->output_setname = req->sortedResultSetName;
2235     bsrr->sort_sequence = req->sortSequence;
2236     bsrr->stream = assoc->encode;
2237     bsrr->print = assoc->print;
2238
2239     bsrr->sort_status = Z_SortStatus_failure;
2240     bsrr->errcode = 0;
2241     bsrr->errstring = 0;
2242
2243     (*assoc->init->bend_sort)(assoc->backend, bsrr);
2244
2245     res->referenceId = bsrr->referenceId;
2246     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
2247     res->resultSetStatus = 0;
2248     if (bsrr->errcode)
2249     {
2250         Z_DiagRecs *dr = diagrecs (assoc, bsrr->errcode, bsrr->errstring);
2251         res->diagnostics = dr->diagRecs;
2252         res->num_diagnostics = dr->num_diagRecs;
2253     }
2254     else
2255     {
2256         res->num_diagnostics = 0;
2257         res->diagnostics = 0;
2258     }
2259     res->otherInfo = 0;
2260
2261     apdu->which = Z_APDU_sortResponse;
2262     apdu->u.sortResponse = res;
2263     return apdu;
2264 }
2265
2266 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
2267     int *fd)
2268 {
2269     Z_DeleteResultSetRequest *req =
2270         reqb->apdu_request->u.deleteResultSetRequest;
2271     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
2272         odr_malloc (assoc->encode, sizeof(*res));
2273     bend_delete_rr *bdrr = (bend_delete_rr *)
2274         odr_malloc (assoc->encode, sizeof(*bdrr));
2275     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2276
2277     yaz_log(LOG_LOG, "Got DeleteRequest.");
2278
2279     bdrr->num_setnames = req->num_resultSetList;
2280     bdrr->setnames = req->resultSetList;
2281     bdrr->stream = assoc->encode;
2282     bdrr->print = assoc->print;
2283     bdrr->function = *req->deleteFunction;
2284     bdrr->referenceId = req->referenceId;
2285     bdrr->statuses = 0;
2286     if (bdrr->num_setnames > 0)
2287     {
2288         int i;
2289         bdrr->statuses = (int*)
2290             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
2291                        bdrr->num_setnames);
2292         for (i = 0; i < bdrr->num_setnames; i++)
2293             bdrr->statuses[i] = 0;
2294     }
2295     (*assoc->init->bend_delete)(assoc->backend, bdrr);
2296
2297     res->referenceId = req->referenceId;
2298
2299     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
2300
2301     res->deleteListStatuses = 0;
2302     if (bdrr->num_setnames > 0)
2303     {
2304         int i;
2305         res->deleteListStatuses = (Z_ListStatuses *)
2306             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
2307         res->deleteListStatuses->num = bdrr->num_setnames;
2308         res->deleteListStatuses->elements =
2309             (Z_ListStatus **)
2310             odr_malloc (assoc->encode,
2311                         sizeof(*res->deleteListStatuses->elements) *
2312                         bdrr->num_setnames);
2313         for (i = 0; i<bdrr->num_setnames; i++)
2314         {
2315             res->deleteListStatuses->elements[i] =
2316                 (Z_ListStatus *)
2317                 odr_malloc (assoc->encode,
2318                             sizeof(**res->deleteListStatuses->elements));
2319             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
2320             res->deleteListStatuses->elements[i]->id =
2321                 odr_strdup (assoc->encode, bdrr->setnames[i]);
2322
2323         }
2324     }
2325     res->numberNotDeleted = 0;
2326     res->bulkStatuses = 0;
2327     res->deleteMessage = 0;
2328     res->otherInfo = 0;
2329
2330     apdu->which = Z_APDU_deleteResultSetResponse;
2331     apdu->u.deleteResultSetResponse = res;
2332     return apdu;
2333 }
2334
2335 static void process_close(association *assoc, request *reqb)
2336 {
2337     Z_Close *req = reqb->apdu_request->u.close;
2338     static char *reasons[] =
2339     {
2340         "finished",
2341         "shutdown",
2342         "systemProblem",
2343         "costLimit",
2344         "resources",
2345         "securityViolation",
2346         "protocolError",
2347         "lackOfActivity",
2348         "peerAbort",
2349         "unspecified"
2350     };
2351
2352     yaz_log(LOG_LOG, "Got Close, reason %s, message %s",
2353         reasons[*req->closeReason], req->diagnosticInformation ?
2354         req->diagnosticInformation : "NULL");
2355     if (assoc->version < 3) /* to make do_force respond with close */
2356         assoc->version = 3;
2357     do_close_req(assoc, Z_Close_finished,
2358                  "Association terminated by client", reqb);
2359 }
2360
2361 void save_referenceId (request *reqb, Z_ReferenceId *refid)
2362 {
2363     if (refid)
2364     {
2365         reqb->len_refid = refid->len;
2366         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
2367         memcpy (reqb->refid, refid->buf, refid->len);
2368     }
2369     else
2370     {
2371         reqb->len_refid = 0;
2372         reqb->refid = NULL;
2373     }
2374 }
2375
2376 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
2377 {
2378     process_z_response (a, req, res);
2379 }
2380
2381 bend_request bend_request_mk (bend_association a)
2382 {
2383     request *nreq = request_get (&a->outgoing);
2384     nreq->request_mem = nmem_create ();
2385     return nreq;
2386 }
2387
2388 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
2389 {
2390     Z_ReferenceId *id;
2391     if (!req->refid)
2392         return 0;
2393     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
2394     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
2395     id->len = id->size = req->len_refid;
2396     memcpy (id->buf, req->refid, req->len_refid);
2397     return id;
2398 }
2399
2400 void bend_request_destroy (bend_request *req)
2401 {
2402     nmem_destroy((*req)->request_mem);
2403     request_release(*req);
2404     *req = NULL;
2405 }
2406
2407 int bend_backend_respond (bend_association a, bend_request req)
2408 {
2409     char *msg;
2410     int r;
2411     r = process_z_request (a, req, &msg);
2412     if (r < 0)
2413         yaz_log (LOG_WARN, "%s", msg);
2414     return r;
2415 }
2416
2417 void bend_request_setdata(bend_request r, void *p)
2418 {
2419     r->clientData = p;
2420 }
2421
2422 void *bend_request_getdata(bend_request r)
2423 {
2424     return r->clientData;
2425 }
2426
2427 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
2428 {
2429     bend_segment_rr req;
2430
2431     req.segment = reqb->apdu_request->u.segmentRequest;
2432     req.stream = assoc->encode;
2433     req.decode = assoc->decode;
2434     req.print = assoc->print;
2435     req.association = assoc;
2436
2437     (*assoc->init->bend_segment)(assoc->backend, &req);
2438
2439     return 0;
2440 }
2441
2442 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
2443 {
2444     bend_esrequest_rr esrequest;
2445
2446     Z_ExtendedServicesRequest *req =
2447         reqb->apdu_request->u.extendedServicesRequest;
2448     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
2449
2450     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
2451
2452     yaz_log(LOG_DEBUG,"inside Process esRequest");
2453
2454     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
2455     esrequest.stream = assoc->encode;
2456     esrequest.decode = assoc->decode;
2457     esrequest.print = assoc->print;
2458     esrequest.errcode = 0;
2459     esrequest.errstring = NULL;
2460     esrequest.request = reqb;
2461     esrequest.association = assoc;
2462     esrequest.taskPackage = 0;
2463     esrequest.referenceId = req->referenceId;
2464
2465     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
2466
2467     /* If the response is being delayed, return NULL */
2468     if (esrequest.request == NULL)
2469         return(NULL);
2470
2471     resp->referenceId = req->referenceId;
2472
2473     if (esrequest.errcode == -1)
2474     {
2475         /* Backend service indicates request will be processed */
2476         yaz_log(LOG_DEBUG,"Request could be processed...Accepted !");
2477         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
2478     }
2479     else if (esrequest.errcode == 0)
2480     {
2481         /* Backend service indicates request will be processed */
2482         yaz_log(LOG_DEBUG,"Request could be processed...Done !");
2483         *resp->operationStatus = Z_ExtendedServicesResponse_done;
2484     }
2485     else
2486     {
2487         Z_DiagRecs *diagRecs = diagrecs (assoc, esrequest.errcode,
2488                                          esrequest.errstring);
2489
2490         /* Backend indicates error, request will not be processed */
2491         yaz_log(LOG_DEBUG,"Request could not be processed...failure !");
2492         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
2493         resp->num_diagnostics = diagRecs->num_diagRecs;
2494         resp->diagnostics = diagRecs->diagRecs;
2495     }
2496     /* Do something with the members of bend_extendedservice */
2497     if (esrequest.taskPackage)
2498         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
2499                                          (const char *)  esrequest.taskPackage,
2500                                           -1);
2501     yaz_log(LOG_DEBUG,"Send the result apdu");
2502     return apdu;
2503 }
2504