server/seshigh.c

   1 /*
   2  * Copyright (c) 1995-2003, Index Data
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: seshigh.c,v 1.136 2003-02-17 14:35:42 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 #else
  37 #include <sys/stat.h>
  38 #include <unistd.h>
  39 #endif
  40 #include <assert.h>
  41
  42 #include <yaz/yconfig.h>
  43 #include <yaz/xmalloc.h>
  44 #include <yaz/comstack.h>
  45 #include "eventl.h"
  46 #include "session.h"
  47 #include <yaz/proto.h>
  48 #include <yaz/oid.h>
  49 #include <yaz/log.h>
  50 #include <yaz/logrpn.h>
  51 #include <yaz/statserv.h>
  52 #include <yaz/diagbib1.h>
  53 #include <yaz/charneg.h>
  54 #include <yaz/otherinfo.h>
  55 #include <yaz/yaz-util.h>
  56
  57 #include <yaz/srw.h>
  58 #include <yaz/backend.h>
  59
  60 static void process_gdu_request(association *assoc, request *req);
  61 static int process_z_request(association *assoc, request *req, char **msg);
  62 void backend_response(IOCHAN i, int event);
  63 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  64 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  65 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  66 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  67     int *fd);
  68 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  69     bend_search_rr *bsrr, int *fd);
  70 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  71     int *fd);
  72 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  73 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  74 static void process_close(association *assoc, request *reqb);
  75 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  76 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  77     int *fd);
  78 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
  79
  80 static FILE *apduf = 0; /* for use in static mode */
  81 static statserv_options_block *control_block = 0;
  82
  83 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
  84
  85 /*
  86  * Create and initialize a new association-handle.
  87  *  channel  : iochannel for the current line.
  88  *  link     : communications channel.
  89  * Returns: 0 or a new association handle.
  90  */
  91 association *create_association(IOCHAN channel, COMSTACK link)
  92 {
  93     association *anew;
  94
  95     if (!control_block)
  96         control_block = statserv_getcontrol();
  97     if (!(anew = (association *)xmalloc(sizeof(*anew))))
  98         return 0;
  99     anew->init = 0;
 100     anew->client_chan = channel;
 101     anew->client_link = link;
 102     anew->cs_get_mask = 0;
 103     anew->cs_put_mask = 0;
 104     anew->cs_accept_mask = 0;
 105     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 106         !(anew->encode = odr_createmem(ODR_ENCODE)))
 107         return 0;
 108     if (*control_block->apdufile)
 109     {
 110         char filename[256];
 111         FILE *f;
 112
 113         strcpy(filename, control_block->apdufile);
 114         if (!(anew->print = odr_createmem(ODR_PRINT)))
 115             return 0;
 116         if (*control_block->apdufile == '@')
 117         {
 118             odr_setprint(anew->print, yaz_log_file());
 119         }
 120         else if (*control_block->apdufile != '-')
 121         {
 122             strcpy(filename, control_block->apdufile);
 123             if (!control_block->dynamic)
 124             {
 125                 if (!apduf)
 126                 {
 127                     if (!(apduf = fopen(filename, "w")))
 128                     {
 129                         yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename);
 130                         return 0;
 131                     }
 132                     setvbuf(apduf, 0, _IONBF, 0);
 133                 }
 134                 f = apduf;
 135             }
 136             else
 137             {
 138                 sprintf(filename + strlen(filename), ".%d", getpid());
 139                 if (!(f = fopen(filename, "w")))
 140                 {
 141                     yaz_log(LOG_WARN|LOG_ERRNO, "%s", filename);
 142                     return 0;
 143                 }
 144                 setvbuf(f, 0, _IONBF, 0);
 145             }
 146             odr_setprint(anew->print, f);
 147         }
 148     }
 149     else
 150         anew->print = 0;
 151     anew->input_buffer = 0;
 152     anew->input_buffer_len = 0;
 153     anew->backend = 0;
 154     anew->state = ASSOC_NEW;
 155     request_initq(&anew->incoming);
 156     request_initq(&anew->outgoing);
 157     anew->proto = cs_getproto(link);
 158     return anew;
 159 }
 160
 161 /*
 162  * Free association and release resources.
 163  */
 164 void destroy_association(association *h)
 165 {
 166     statserv_options_block *cb = statserv_getcontrol();
 167
 168     xfree(h->init);
 169     odr_destroy(h->decode);
 170     odr_destroy(h->encode);
 171     if (h->print)
 172         odr_destroy(h->print);
 173     if (h->input_buffer)
 174     xfree(h->input_buffer);
 175     if (h->backend)
 176         (*cb->bend_close)(h->backend);
 177     while (request_deq(&h->incoming));
 178     while (request_deq(&h->outgoing));
 179     request_delq(&h->incoming);
 180     request_delq(&h->outgoing);
 181     xfree(h);
 182     xmalloc_trav("session closed");
 183     if (control_block && control_block->one_shot)
 184         exit (0);
 185 }
 186
 187 static void do_close_req(association *a, int reason, char *message,
 188                          request *req)
 189 {
 190     Z_APDU apdu;
 191     Z_Close *cls = zget_Close(a->encode);
 192
 193     /* Purge request queue */
 194     while (request_deq(&a->incoming));
 195     while (request_deq(&a->outgoing));
 196     if (a->version >= 3)
 197     {
 198         yaz_log(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
 199             reason, message ? message : "none");
 200         apdu.which = Z_APDU_close;
 201         apdu.u.close = cls;
 202         *cls->closeReason = reason;
 203         cls->diagnosticInformation = message;
 204         process_z_response(a, req, &apdu);
 205         iochan_settimeout(a->client_chan, 60);
 206     }
 207     else
 208     {
 209         yaz_log(LOG_DEBUG, "v2 client. No Close PDU");
 210         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 211     }
 212     a->state = ASSOC_DEAD;
 213 }
 214
 215 static void do_close(association *a, int reason, char *message)
 216 {
 217     do_close_req (a, reason, message, request_get(&a->outgoing));
 218 }
 219
 220 /*
 221  * This is where PDUs from the client are read and the further
 222  * processing is initiated. Flow of control moves down through the
 223  * various process_* functions below, until the encoded result comes back up
 224  * to the output handler in here.
 225  *
 226  *  h     : the I/O channel that has an outstanding event.
 227  *  event : the current outstanding event.
 228  */
 229 void ir_session(IOCHAN h, int event)
 230 {
 231     int res;
 232     association *assoc = (association *)iochan_getdata(h);
 233     COMSTACK conn = assoc->client_link;
 234     request *req;
 235
 236     assert(h && conn && assoc);
 237     if (event == EVENT_TIMEOUT)
 238     {
 239         if (assoc->state != ASSOC_UP)
 240         {
 241             yaz_log(LOG_LOG, "Final timeout - closing connection.");
 242             cs_close(conn);
 243             destroy_association(assoc);
 244             iochan_destroy(h);
 245         }
 246         else
 247         {
 248             yaz_log(LOG_LOG, "Session idle too long. Sending close.");
 249             do_close(assoc, Z_Close_lackOfActivity, 0);
 250         }
 251         return;
 252     }
 253     if (event & assoc->cs_accept_mask)
 254     {
 255         yaz_log (LOG_DEBUG, "ir_session (accept)");
 256         if (!cs_accept (conn))
 257         {
 258             yaz_log (LOG_LOG, "accept failed");
 259             destroy_association(assoc);
 260             iochan_destroy(h);
 261         }
 262         iochan_clearflag (h, EVENT_OUTPUT|EVENT_OUTPUT);
 263         if (conn->io_pending)
 264         {   /* cs_accept didn't complete */
 265             assoc->cs_accept_mask =
 266                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 267                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 268
 269             iochan_setflag (h, assoc->cs_accept_mask);
 270         }
 271         else
 272         {   /* cs_accept completed. Prepare for reading (cs_get) */
 273             assoc->cs_accept_mask = 0;
 274             assoc->cs_get_mask = EVENT_INPUT;
 275             iochan_setflag (h, assoc->cs_get_mask);
 276         }
 277         return;
 278     }
 279     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 280     {
 281         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 282         {
 283             yaz_log(LOG_DEBUG, "ir_session (input)");
 284             /* We aren't speaking to this fellow */
 285             if (assoc->state == ASSOC_DEAD)
 286             {
 287                 yaz_log(LOG_LOG, "Closed connection after reject");
 288                 cs_close(conn);
 289                 destroy_association(assoc);
 290                 iochan_destroy(h);
 291                 return;
 292             }
 293             assoc->cs_get_mask = EVENT_INPUT;
 294             if ((res = cs_get(conn, &assoc->input_buffer,
 295                 &assoc->input_buffer_len)) <= 0)
 296             {
 297                 yaz_log(LOG_LOG, "Connection closed by client");
 298                 cs_close(conn);
 299                 destroy_association(assoc);
 300                 iochan_destroy(h);
 301                 return;
 302             }
 303             else if (res == 1) /* incomplete read - wait for more  */
 304             {
 305                 if (conn->io_pending & CS_WANT_WRITE)
 306                     assoc->cs_get_mask |= EVENT_OUTPUT;
 307                 iochan_setflag(h, assoc->cs_get_mask);
 308                 return;
 309             }
 310             if (cs_more(conn)) /* more stuff - call us again later, please */
 311                 iochan_setevent(h, EVENT_INPUT);
 312
 313             /* we got a complete PDU. Let's decode it */
 314             yaz_log(LOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 315                             assoc->input_buffer[0] & 0xff,
 316                             assoc->input_buffer[1] & 0xff,
 317                             assoc->input_buffer[2] & 0xff);
 318             req = request_get(&assoc->incoming); /* get a new request structure */
 319             odr_reset(assoc->decode);
 320             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 321             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 322             {
 323                 yaz_log(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ",
 324                         odr_errmsg(odr_geterror(assoc->decode)),
 325                         odr_offset(assoc->decode));
 326                 if (assoc->decode->error != OHTTP)
 327                 {
 328                     yaz_log(LOG_LOG, "PDU dump:");
 329                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 330                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 331                 }
 332                 else
 333                 {
 334                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 335                     assoc->state = ASSOC_DEAD;
 336                     process_gdu_response(assoc, req, p);
 337                 }
 338                 return;
 339             }
 340             req->request_mem = odr_extract_mem(assoc->decode);
 341             if (assoc->print && !z_GDU(assoc->print, &req->gdu_request, 0, 0))
 342             {
 343                 yaz_log(LOG_WARN, "ODR print error: %s",
 344                     odr_errmsg(odr_geterror(assoc->print)));
 345                 odr_reset(assoc->print);
 346             }
 347             request_enq(&assoc->incoming, req);
 348         }
 349
 350         /* can we do something yet? */
 351         req = request_head(&assoc->incoming);
 352         if (req->state == REQUEST_IDLE)
 353         {
 354             request_deq(&assoc->incoming);
 355             process_gdu_request(assoc, req);
 356         }
 357     }
 358     if (event & assoc->cs_put_mask)
 359     {
 360         request *req = request_head(&assoc->outgoing);
 361
 362         assoc->cs_put_mask = 0;
 363         yaz_log(LOG_DEBUG, "ir_session (output)");
 364         req->state = REQUEST_PENDING;
 365         switch (res = cs_put(conn, req->response, req->len_response))
 366         {
 367         case -1:
 368             yaz_log(LOG_LOG, "Connection closed by client");
 369             cs_close(conn);
 370             destroy_association(assoc);
 371             iochan_destroy(h);
 372             break;
 373         case 0: /* all sent - release the request structure */
 374             yaz_log(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 375 #if 0
 376             yaz_log(LOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 377                     req->response);
 378 #endif
 379             nmem_destroy(req->request_mem);
 380             request_deq(&assoc->outgoing);
 381             request_release(req);
 382             if (!request_head(&assoc->outgoing))
 383             {   /* restore mask for cs_get operation ... */
 384                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 385                 iochan_setflag(h, assoc->cs_get_mask);
 386                 yaz_log(LOG_LOG, "queue empty mask=%d", assoc->cs_get_mask);
 387                 if (assoc->state == ASSOC_DEAD)
 388                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 389             }
 390             else
 391             {
 392                 assoc->cs_put_mask = EVENT_OUTPUT;
 393                 yaz_log(LOG_LOG, "queue not empty");
 394             }
 395             break;
 396         default:
 397             if (conn->io_pending & CS_WANT_WRITE)
 398                 assoc->cs_put_mask |= EVENT_OUTPUT;
 399             if (conn->io_pending & CS_WANT_READ)
 400                 assoc->cs_put_mask |= EVENT_INPUT;
 401             iochan_setflag(h, assoc->cs_put_mask);
 402         }
 403     }
 404     if (event & EVENT_EXCEPT)
 405     {
 406         yaz_log(LOG_LOG, "ir_session (exception)");
 407         cs_close(conn);
 408         destroy_association(assoc);
 409         iochan_destroy(h);
 410     }
 411 }
 412
 413 static int process_z_request(association *assoc, request *req, char **msg);
 414
 415 static int srw_bend_init(association *assoc)
 416 {
 417     bend_initresult *binitres;
 418     statserv_options_block *cb = statserv_getcontrol();
 419
 420     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 421
 422     assoc->init->stream = assoc->encode;
 423     assoc->init->print = assoc->print;
 424     assoc->init->auth = 0;
 425     assoc->init->referenceId = 0;
 426     assoc->init->implementation_version = 0;
 427     assoc->init->implementation_id = 0;
 428     assoc->init->implementation_name = 0;
 429     assoc->init->bend_sort = NULL;
 430     assoc->init->bend_search = NULL;
 431     assoc->init->bend_present = NULL;
 432     assoc->init->bend_esrequest = NULL;
 433     assoc->init->bend_delete = NULL;
 434     assoc->init->bend_scan = NULL;
 435     assoc->init->bend_segment = NULL;
 436     assoc->init->bend_fetch = NULL;
 437     assoc->init->charneg_request = NULL;
 438     assoc->init->charneg_response = NULL;
 439     assoc->init->decode = assoc->decode;
 440
 441     assoc->init->peer_name =
 442         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 443     if (!(binitres = (*cb->bend_init)(assoc->init)))
 444     {
 445         yaz_log(LOG_WARN, "Bad response from backend.");
 446         return 0;
 447     }
 448     assoc->backend = binitres->handle;
 449     return 1;
 450 }
 451
 452 static void srw_bend_fetch(association *assoc, int pos,
 453                            Z_SRW_searchRetrieveRequest *srw_req,
 454                            Z_SRW_record *record)
 455 {
 456     bend_fetch_rr rr;
 457     ODR o = assoc->encode;
 458
 459     rr.setname = "default";
 460     rr.number = pos;
 461     rr.referenceId = 0;
 462     rr.request_format = VAL_TEXT_XML;
 463     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 464                                                    CLASS_TRANSYN,
 465                                                    VAL_TEXT_XML);
 466     rr.comp = (Z_RecordComposition *)
 467             odr_malloc(assoc->decode, sizeof(*rr.comp));
 468     rr.comp->which = Z_RecordComp_complex;
 469     rr.comp->u.complex = (Z_CompSpec *)
 470             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 471     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 472         odr_malloc(assoc->encode, sizeof(bool_t));
 473     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 474     rr.comp->u.complex->num_dbSpecific = 0;
 475     rr.comp->u.complex->dbSpecific = 0;
 476     rr.comp->u.complex->num_recordSyntax = 0;
 477     rr.comp->u.complex->recordSyntax = 0;
 478
 479     rr.comp->u.complex->generic = (Z_Specification *)
 480             odr_malloc(assoc->decode, sizeof(Z_Specification));
 481     rr.comp->u.complex->generic->which = Z_Specification_uri;
 482     rr.comp->u.complex->generic->u.uri = srw_req->recordSchema;
 483     rr.comp->u.complex->generic->elementSpec = 0;
 484
 485     rr.stream = assoc->encode;
 486     rr.print = assoc->print;
 487
 488     rr.basename = 0;
 489     rr.len = 0;
 490     rr.record = 0;
 491     rr.last_in_set = 0;
 492     rr.output_format = VAL_TEXT_XML;
 493     rr.output_format_raw = 0;
 494     rr.errcode = 0;
 495     rr.errstring = 0;
 496     rr.surrogate_flag = 0;
 497
 498     (*assoc->init->bend_fetch)(assoc->backend, &rr);
 499
 500     if (rr.len >= 0)
 501     {
 502         record->recordData_buf = rr.record;
 503         record->recordData_len = rr.len;
 504         record->recordPosition = odr_intdup(o, pos);
 505         record->recordSchema = 0;
 506         if (srw_req->recordSchema)
 507             record->recordSchema = odr_strdup(o, srw_req->recordSchema);
 508     }
 509 }
 510
 511 static void srw_bend_search(association *assoc, request *req,
 512                             Z_SRW_searchRetrieveRequest *srw_req,
 513                             Z_SRW_searchRetrieveResponse *srw_res)
 514 {
 515     char *base = "Default";
 516     bend_search_rr rr;
 517     Z_External *ext;
 518
 519     if (!assoc->init)
 520         srw_bend_init(assoc);
 521
 522     rr.setname = "default";
 523     rr.replace_set = 1;
 524     rr.num_bases = 1;
 525     rr.basenames = &srw_req->database;
 526     rr.referenceId = 0;
 527
 528     ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 529     ext->direct_reference = odr_getoidbystr(assoc->decode,
 530                                             "1.2.840.10003.16.2");
 531     ext->indirect_reference = 0;
 532     ext->descriptor = 0;
 533     ext->which = Z_External_CQL;
 534     if (srw_req->query)
 535         ext->u.cql = srw_req->query;
 536     else
 537         ext->u.cql = "noterm";
 538
 539     rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 540     rr.query->which = Z_Query_type_104;
 541     rr.query->u.type_104 =  ext;
 542
 543     rr.stream = assoc->encode;
 544     rr.decode = assoc->decode;
 545     rr.print = assoc->print;
 546     rr.request = req;
 547     rr.association = assoc;
 548     rr.fd = 0;
 549     rr.hits = 0;
 550     rr.errcode = 0;
 551     rr.errstring = 0;
 552     rr.search_info = 0;
 553     yaz_log_zquery(rr.query);
 554     (assoc->init->bend_search)(assoc->backend, &rr);
 555     srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 556     if (rr.errcode)
 557     {
 558         srw_res->num_diagnostics = 1;
 559         srw_res->diagnostics = (Z_SRW_diagnostic *)
 560             odr_malloc(assoc->encode, sizeof(*srw_res->diagnostics));
 561         srw_res->diagnostics[0].code =
 562             odr_intdup(assoc->encode, rr.errcode);
 563         srw_res->diagnostics[0].details = rr.errstring;
 564     }
 565     else
 566     {
 567         srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 568         if (srw_req->maximumRecords && *srw_req->maximumRecords > 0)
 569         {
 570             int number = *srw_req->maximumRecords;
 571             int start = 1;
 572             int i;
 573             if (srw_req->startRecord)
 574                 start = *srw_req->startRecord;
 575             if (start <= rr.hits)
 576             {
 577                 int j = 0;
 578                 if (start + number > rr.hits)
 579                     number = rr.hits - start + 1;
 580                 srw_res->records = (Z_SRW_record *)
 581                     odr_malloc(assoc->encode,
 582                                number * sizeof(*srw_res->records));
 583                 for (i = 0; i<number; i++)
 584                 {
 585                     srw_res->records[j].recordData_buf = 0;
 586                     srw_bend_fetch(assoc, i+start, srw_req,
 587                                    srw_res->records + j);
 588                     if (srw_res->records[j].recordData_buf)
 589                         j++;
 590                 }
 591                 srw_res->num_records = j;
 592                 if (!j)
 593                     srw_res->records = 0;
 594                 yaz_log(LOG_LOG, "got %d records", j);
 595             }
 596         }
 597     }
 598 }
 599
 600 static void process_http_request(association *assoc, request *req)
 601 {
 602     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
 603     ODR o = assoc->encode;
 604     Z_GDU *p = 0;
 605     Z_HTTP_Response *hres = 0;
 606     int keepalive = 1;
 607
 608     if (!strcmp(hreq->method, "GET"))
 609     {
 610 #ifdef DOCDIR
 611         if (strlen(hreq->path) >= 5 && strlen(hreq->path) < 80 &&
 612                          !memcmp(hreq->path, "/doc/", 5))
 613         {
 614             FILE *f;
 615             char fpath[120];
 616
 617             strcpy(fpath, DOCDIR);
 618             strcat(fpath, hreq->path+4);
 619             f = fopen(fpath, "rb");
 620             if (f) {
 621                 struct stat sbuf;
 622                 if (fstat(fileno(f), &sbuf) || !S_ISREG(sbuf.st_mode))
 623                 {
 624                     fclose(f);
 625                     f = 0;
 626                 }
 627             }
 628             if (f)
 629             {
 630                 long sz;
 631                 fseek(f, 0L, SEEK_END);
 632                 sz = ftell(f);
 633                 if (sz >= 0 && sz < 500000)
 634                 {
 635                     const char *ctype = "application/octet-stream";
 636                     const char *cp;
 637
 638                     p = z_get_HTTP_Response(o, 200);
 639                     hres = p->u.HTTP_Response;
 640                     hres->content_buf = (char *) odr_malloc(o, sz + 1);
 641                     hres->content_len = sz;
 642                     fseek(f, 0L, SEEK_SET);
 643                     fread(hres->content_buf, 1, sz, f);
 644                     if ((cp = strrchr(fpath, '.'))) {
 645                         cp++;
 646                         if (!strcmp(cp, "png"))
 647                             ctype = "image/png";
 648                         else if (!strcmp(cp, "gif"))
 649                             ctype = "image/gif";
 650                         else if (!strcmp(cp, "xml"))
 651                             ctype = "text/xml";
 652                         else if (!strcmp(cp, "html"))
 653                             ctype = "text/html";
 654                     }
 655                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
 656                     yaz_log(LOG_LOG, "OK send page %s size=%ld", fpath, sz);
 657                 }
 658                 fclose(f);
 659             }
 660         }
 661 #endif
 662         if (!strcmp(hreq->path, "/"))
 663         {
 664             struct stat sbuf;
 665             const char *doclink = "";
 666             p = z_get_HTTP_Response(o, 200);
 667             hres = p->u.HTTP_Response;
 668             hres->content_buf = (char *) odr_malloc(o, 400);
 669 #ifdef DOCDIR
 670             if (stat(DOCDIR "/yaz.html", &sbuf) == 0 && S_ISREG(sbuf.st_mode))
 671                 doclink = "<P><A HREF=\"/doc/yaz.html\">Documentation</A></P>";
 672 #endif
 673             sprintf (hres->content_buf,
 674                      "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n"
 675                      "<HTML>\n"
 676                      " <HEAD>\n"
 677                      "  <TITLE>YAZ " YAZ_VERSION "</TITLE>\n"
 678                      " </HEAD>\n"
 679                      " <BODY>\n"
 680                      "  <P><A HREF=\"http://www.indexdata.dk/yaz/\">YAZ</A> "
 681                      YAZ_VERSION "</P>\n"
 682                      "%s"
 683                      " </BODY>\n"
 684                      "</HTML>\n", doclink);
 685             hres->content_len = strlen(hres->content_buf);
 686             z_HTTP_header_add(o, &hres->headers, "Content-Type", "text/html");
 687         }
 688         if (!p)
 689         {
 690             p = z_get_HTTP_Response(o, 404);
 691         }
 692     }
 693     else if (!strcmp(hreq->method, "POST"))
 694     {
 695 #if HAVE_XSLT
 696         const char *content_type = z_HTTP_header_lookup(hreq->headers,
 697                                                         "Content-Type");
 698         const char *soap_action = z_HTTP_header_lookup(hreq->headers,
 699                                                        "SOAPAction");
 700         if (content_type && soap_action &&
 701             !yaz_strcmp_del("text/xml", content_type, "; "))
 702         {
 703             Z_SOAP *soap_package = 0;
 704             int ret;
 705             int http_code = 500;
 706
 707             static Z_SOAP_Handler soap_handlers[2] = {
 708                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
 709                                          (Z_SOAP_fun) yaz_srw_codec},
 710                 {0, 0, 0}
 711             };
 712
 713             ret = z_soap_codec(assoc->decode, &soap_package,
 714                                &hreq->content_buf, &hreq->content_len,
 715                                soap_handlers);
 716
 717             if (!ret && soap_package->which == Z_SOAP_generic &&
 718                 soap_package->u.generic->no == 0)
 719             {
 720                 /* SRW package */
 721                 Z_SRW_searchRetrieve *sr = soap_package->u.generic->p;
 722
 723                 if (sr->which == Z_SRW_searchRetrieve_request)
 724                 {
 725                     Z_SRW_searchRetrieve *res =
 726                         yaz_srw_get(assoc->encode,
 727                                     Z_SRW_searchRetrieve_response);
 728
 729                     if (!sr->u.request->database)
 730                     {
 731                         const char *p0 = hreq->path, *p1;
 732                         if (*p0 == '/')
 733                             p0++;
 734                         p1 = strchr(p0, '?');
 735                         if (!p1)
 736                             p1 = p0 + strlen(p0);
 737                         if (p1 != p0)
 738                         {
 739                             sr->u.request->database =
 740                                 odr_malloc(assoc->decode, p1 - p0 + 1);
 741                             memcpy (sr->u.request->database, p0, p1 - p0);
 742                             sr->u.request->database[p1 - p0] = '\0';
 743                         }
 744                         else
 745                             sr->u.request->database = "Default";
 746                     }
 747                     srw_bend_search(assoc, req, sr->u.request,
 748                                     res->u.response);
 749
 750                     soap_package->u.generic->p = res;
 751                     http_code = 200;
 752                 }
 753             }
 754
 755             p = z_get_HTTP_Response(o, 200);
 756             hres = p->u.HTTP_Response;
 757             ret = z_soap_codec(assoc->encode, &soap_package,
 758                                &hres->content_buf, &hres->content_len,
 759                                soap_handlers);
 760             hres->code = http_code;
 761             z_HTTP_header_add(o, &hres->headers, "Content-Type", "text/xml");
 762         }
 763 #endif
 764         if (!p) /* still no response ? */
 765             p = z_get_HTTP_Response(o, 500);
 766     }
 767     else
 768     {
 769         p = z_get_HTTP_Response(o, 405);
 770         hres = p->u.HTTP_Response;
 771
 772         z_HTTP_header_add(o, &hres->headers, "Allow", "GET, POST");
 773     }
 774     hres = p->u.HTTP_Response;
 775     if (!strcmp(hreq->version, "1.0"))
 776     {
 777         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
 778         if (v && !strcmp(v, "Keep-Alive"))
 779             keepalive = 1;
 780         else
 781             keepalive = 0;
 782         hres->version = "1.0";
 783     }
 784     else
 785     {
 786         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
 787         if (v && !strcmp(v, "close"))
 788             keepalive = 0;
 789         else
 790             keepalive = 1;
 791         hres->version = "1.1";
 792     }
 793     if (!keepalive)
 794     {
 795         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
 796         assoc->state = ASSOC_DEAD;
 797     }
 798     else
 799     {
 800         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
 801     }
 802     process_gdu_response(assoc, req, p);
 803 }
 804
 805 static void process_gdu_request(association *assoc, request *req)
 806 {
 807     if (req->gdu_request->which == Z_GDU_Z3950)
 808     {
 809         char *msg = 0;
 810         req->apdu_request = req->gdu_request->u.z3950;
 811         if (process_z_request(assoc, req, &msg) < 0)
 812             do_close_req(assoc, Z_Close_systemProblem, msg, req);
 813     }
 814     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
 815         process_http_request(assoc, req);
 816     else
 817     {
 818         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
 819     }
 820 }
 821
 822 /*
 823  * Initiate request processing.
 824  */
 825 static int process_z_request(association *assoc, request *req, char **msg)
 826 {
 827     int fd = -1;
 828     Z_APDU *res;
 829     int retval;
 830
 831     *msg = "Unknown Error";
 832     assert(req && req->state == REQUEST_IDLE);
 833     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
 834     {
 835         *msg = "Missing InitRequest";
 836         return -1;
 837     }
 838     switch (req->apdu_request->which)
 839     {
 840     case Z_APDU_initRequest:
 841         res = process_initRequest(assoc, req); break;
 842     case Z_APDU_searchRequest:
 843         res = process_searchRequest(assoc, req, &fd); break;
 844     case Z_APDU_presentRequest:
 845         res = process_presentRequest(assoc, req, &fd); break;
 846     case Z_APDU_scanRequest:
 847         if (assoc->init->bend_scan)
 848             res = process_scanRequest(assoc, req, &fd);
 849         else
 850         {
 851             *msg = "Cannot handle Scan APDU";
 852             return -1;
 853         }
 854         break;
 855     case Z_APDU_extendedServicesRequest:
 856         if (assoc->init->bend_esrequest)
 857             res = process_ESRequest(assoc, req, &fd);
 858         else
 859         {
 860             *msg = "Cannot handle Extended Services APDU";
 861             return -1;
 862         }
 863         break;
 864     case Z_APDU_sortRequest:
 865         if (assoc->init->bend_sort)
 866             res = process_sortRequest(assoc, req, &fd);
 867         else
 868         {
 869             *msg = "Cannot handle Sort APDU";
 870             return -1;
 871         }
 872         break;
 873     case Z_APDU_close:
 874         process_close(assoc, req);
 875         return 0;
 876     case Z_APDU_deleteResultSetRequest:
 877         if (assoc->init->bend_delete)
 878             res = process_deleteRequest(assoc, req, &fd);
 879         else
 880         {
 881             *msg = "Cannot handle Delete APDU";
 882             return -1;
 883         }
 884         break;
 885     case Z_APDU_segmentRequest:
 886         if (assoc->init->bend_segment)
 887         {
 888             res = process_segmentRequest (assoc, req);
 889         }
 890         else
 891         {
 892             *msg = "Cannot handle Segment APDU";
 893             return -1;
 894         }
 895         break;
 896     default:
 897         *msg = "Bad APDU received";
 898         return -1;
 899     }
 900     if (res)
 901     {
 902         yaz_log(LOG_DEBUG, "  result immediately available");
 903         retval = process_z_response(assoc, req, res);
 904     }
 905     else if (fd < 0)
 906     {
 907         yaz_log(LOG_DEBUG, "  result unavailble");
 908         retval = 0;
 909     }
 910     else /* no result yet - one will be provided later */
 911     {
 912         IOCHAN chan;
 913
 914         /* Set up an I/O handler for the fd supplied by the backend */
 915
 916         yaz_log(LOG_DEBUG, "   establishing handler for result");
 917         req->state = REQUEST_PENDING;
 918         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
 919             abort();
 920         iochan_setdata(chan, assoc);
 921         retval = 0;
 922     }
 923     return retval;
 924 }
 925
 926 /*
 927  * Handle message from the backend.
 928  */
 929 void backend_response(IOCHAN i, int event)
 930 {
 931     association *assoc = (association *)iochan_getdata(i);
 932     request *req = request_head(&assoc->incoming);
 933     Z_APDU *res;
 934     int fd;
 935
 936     yaz_log(LOG_DEBUG, "backend_response");
 937     assert(assoc && req && req->state != REQUEST_IDLE);
 938     /* determine what it is we're waiting for */
 939     switch (req->apdu_request->which)
 940     {
 941         case Z_APDU_searchRequest:
 942             res = response_searchRequest(assoc, req, 0, &fd); break;
 943 #if 0
 944         case Z_APDU_presentRequest:
 945             res = response_presentRequest(assoc, req, 0, &fd); break;
 946         case Z_APDU_scanRequest:
 947             res = response_scanRequest(assoc, req, 0, &fd); break;
 948 #endif
 949         default:
 950             yaz_log(LOG_WARN, "Serious programmer's lapse or bug");
 951             abort();
 952     }
 953     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
 954     {
 955         yaz_log(LOG_LOG, "Fatal error when talking to backend");
 956         do_close(assoc, Z_Close_systemProblem, 0);
 957         iochan_destroy(i);
 958         return;
 959     }
 960     else if (!res) /* no result yet - try again later */
 961     {
 962         yaz_log(LOG_DEBUG, "   no result yet");
 963         iochan_setfd(i, fd); /* in case fd has changed */
 964     }
 965 }
 966
 967 /*
 968  * Encode response, and transfer the request structure to the outgoing queue.
 969  */
 970 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
 971 {
 972     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
 973
 974     if (assoc->print && !z_GDU(assoc->print, &res, 0, 0))
 975     {
 976         yaz_log(LOG_WARN, "ODR print error: %s",
 977             odr_errmsg(odr_geterror(assoc->print)));
 978         odr_reset(assoc->print);
 979     }
 980     if (!z_GDU(assoc->encode, &res, 0, 0))
 981     {
 982         yaz_log(LOG_WARN, "ODR error when encoding response: %s",
 983             odr_errmsg(odr_geterror(assoc->decode)));
 984         return -1;
 985     }
 986     req->response = odr_getbuf(assoc->encode, &req->len_response,
 987         &req->size_response);
 988     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
 989     odr_reset(assoc->encode);
 990     req->state = REQUEST_IDLE;
 991     request_enq(&assoc->outgoing, req);
 992     /* turn the work over to the ir_session handler */
 993     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
 994     assoc->cs_put_mask = EVENT_OUTPUT;
 995     /* Is there more work to be done? give that to the input handler too */
 996 #if 1
 997     if (request_head(&assoc->incoming))
 998     {
 999         yaz_log (LOG_DEBUG, "more work to be done");
1000         iochan_setevent(assoc->client_chan, EVENT_WORK);
1001     }
1002 #endif
1003     return 0;
1004 }
1005
1006 /*
1007  * Encode response, and transfer the request structure to the outgoing queue.
1008  */
1009 static int process_z_response(association *assoc, request *req, Z_APDU *res)
1010 {
1011     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
1012
1013     if (assoc->print && !z_APDU(assoc->print, &res, 0, 0))
1014     {
1015         yaz_log(LOG_WARN, "ODR print error: %s",
1016             odr_errmsg(odr_geterror(assoc->print)));
1017         odr_reset(assoc->print);
1018     }
1019     if (!z_APDU(assoc->encode, &res, 0, 0))
1020     {
1021         yaz_log(LOG_WARN, "ODR error when encoding response: %s",
1022             odr_errmsg(odr_geterror(assoc->decode)));
1023         return -1;
1024     }
1025     req->response = odr_getbuf(assoc->encode, &req->len_response,
1026         &req->size_response);
1027     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
1028     odr_reset(assoc->encode);
1029     req->state = REQUEST_IDLE;
1030     request_enq(&assoc->outgoing, req);
1031     /* turn the work over to the ir_session handler */
1032     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
1033     assoc->cs_put_mask = EVENT_OUTPUT;
1034     /* Is there more work to be done? give that to the input handler too */
1035 #if 1
1036     if (request_head(&assoc->incoming))
1037     {
1038         yaz_log (LOG_DEBUG, "more work to be done");
1039         iochan_setevent(assoc->client_chan, EVENT_WORK);
1040     }
1041 #endif
1042     return 0;
1043 }
1044
1045 /*
1046  * Handle init request.
1047  * At the moment, we don't check the options
1048  * anywhere else in the code - we just try not to do anything that would
1049  * break a naive client. We'll toss 'em into the association block when
1050  * we need them there.
1051  */
1052 static Z_APDU *process_initRequest(association *assoc, request *reqb)
1053 {
1054     statserv_options_block *cb = statserv_getcontrol();
1055     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
1056     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
1057     Z_InitResponse *resp = apdu->u.initResponse;
1058     bend_initresult *binitres;
1059
1060     char options[140];
1061
1062     xfree (assoc->init);
1063     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
1064
1065     yaz_log(LOG_LOG, "Got initRequest");
1066     if (req->implementationId)
1067         yaz_log(LOG_LOG, "Id:        %s", req->implementationId);
1068     if (req->implementationName)
1069         yaz_log(LOG_LOG, "Name:      %s", req->implementationName);
1070     if (req->implementationVersion)
1071         yaz_log(LOG_LOG, "Version:   %s", req->implementationVersion);
1072
1073     assoc->init->stream = assoc->encode;
1074     assoc->init->print = assoc->print;
1075     assoc->init->auth = req->idAuthentication;
1076     assoc->init->referenceId = req->referenceId;
1077     assoc->init->implementation_version = 0;
1078     assoc->init->implementation_id = 0;
1079     assoc->init->implementation_name = 0;
1080     assoc->init->bend_sort = NULL;
1081     assoc->init->bend_search = NULL;
1082     assoc->init->bend_present = NULL;
1083     assoc->init->bend_esrequest = NULL;
1084     assoc->init->bend_delete = NULL;
1085     assoc->init->bend_scan = NULL;
1086     assoc->init->bend_segment = NULL;
1087     assoc->init->bend_fetch = NULL;
1088     assoc->init->charneg_request = NULL;
1089     assoc->init->charneg_response = NULL;
1090     assoc->init->decode = assoc->decode;
1091
1092     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
1093     {
1094         Z_CharSetandLanguageNegotiation *negotiation =
1095             yaz_get_charneg_record (req->otherInfo);
1096         if (negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
1097             assoc->init->charneg_request = negotiation;
1098     }
1099
1100     assoc->init->peer_name =
1101         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
1102     if (!(binitres = (*cb->bend_init)(assoc->init)))
1103     {
1104         yaz_log(LOG_WARN, "Bad response from backend.");
1105         return 0;
1106     }
1107
1108     assoc->backend = binitres->handle;
1109     if ((assoc->init->bend_sort))
1110         yaz_log (LOG_DEBUG, "Sort handler installed");
1111     if ((assoc->init->bend_search))
1112         yaz_log (LOG_DEBUG, "Search handler installed");
1113     if ((assoc->init->bend_present))
1114         yaz_log (LOG_DEBUG, "Present handler installed");
1115     if ((assoc->init->bend_esrequest))
1116         yaz_log (LOG_DEBUG, "ESRequest handler installed");
1117     if ((assoc->init->bend_delete))
1118         yaz_log (LOG_DEBUG, "Delete handler installed");
1119     if ((assoc->init->bend_scan))
1120         yaz_log (LOG_DEBUG, "Scan handler installed");
1121     if ((assoc->init->bend_segment))
1122         yaz_log (LOG_DEBUG, "Segment handler installed");
1123
1124     resp->referenceId = req->referenceId;
1125     *options = '\0';
1126     /* let's tell the client what we can do */
1127     if (ODR_MASK_GET(req->options, Z_Options_search))
1128     {
1129         ODR_MASK_SET(resp->options, Z_Options_search);
1130         strcat(options, "srch");
1131     }
1132     if (ODR_MASK_GET(req->options, Z_Options_present))
1133     {
1134         ODR_MASK_SET(resp->options, Z_Options_present);
1135         strcat(options, " prst");
1136     }
1137     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
1138         assoc->init->bend_delete)
1139     {
1140         ODR_MASK_SET(resp->options, Z_Options_delSet);
1141         strcat(options, " del");
1142     }
1143     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
1144         assoc->init->bend_esrequest)
1145     {
1146         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
1147         strcat (options, " extendedServices");
1148     }
1149     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
1150     {
1151         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
1152         strcat(options, " namedresults");
1153     }
1154     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
1155     {
1156         ODR_MASK_SET(resp->options, Z_Options_scan);
1157         strcat(options, " scan");
1158     }
1159     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
1160     {
1161         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
1162         strcat(options, " concurrop");
1163     }
1164     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
1165     {
1166         ODR_MASK_SET(resp->options, Z_Options_sort);
1167         strcat(options, " sort");
1168     }
1169
1170     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
1171         && assoc->init->charneg_response)
1172     {
1173         Z_OtherInformation **p;
1174         Z_OtherInformationUnit *p0;
1175
1176         yaz_oi_APDU(apdu, &p);
1177
1178         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
1179             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
1180
1181             p0->which = Z_OtherInfo_externallyDefinedInfo;
1182             p0->information.externallyDefinedInfo =
1183                 assoc->init->charneg_response;
1184         }
1185         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
1186         strcat(options, " negotiation");
1187     }
1188
1189     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
1190     {
1191         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
1192         assoc->version = 2; /* 1 & 2 are equivalent */
1193     }
1194     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
1195     {
1196         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
1197         assoc->version = 2;
1198     }
1199     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
1200     {
1201         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
1202         assoc->version = 3;
1203     }
1204
1205     yaz_log(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
1206     assoc->maximumRecordSize = *req->maximumRecordSize;
1207     if (assoc->maximumRecordSize > control_block->maxrecordsize)
1208         assoc->maximumRecordSize = control_block->maxrecordsize;
1209     assoc->preferredMessageSize = *req->preferredMessageSize;
1210     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
1211         assoc->preferredMessageSize = assoc->maximumRecordSize;
1212
1213 #if 0
1214     assoc->maximumRecordSize = 3000000;
1215     assoc->preferredMessageSize = 3000000;
1216 #endif
1217
1218     resp->preferredMessageSize = &assoc->preferredMessageSize;
1219     resp->maximumRecordSize = &assoc->maximumRecordSize;
1220
1221     resp->implementationName = "GFS/YAZ";
1222
1223     if (assoc->init->implementation_id)
1224     {
1225         char *nv = (char *)
1226             odr_malloc (assoc->encode,
1227                         strlen(assoc->init->implementation_id) + 10 +
1228                                strlen(resp->implementationId));
1229         sprintf (nv, "%s / %s",
1230                  resp->implementationId, assoc->init->implementation_id);
1231         resp->implementationId = nv;
1232     }
1233     if (assoc->init->implementation_name)
1234     {
1235         char *nv = (char *)
1236             odr_malloc (assoc->encode,
1237                         strlen(assoc->init->implementation_name) + 10 +
1238                                strlen(resp->implementationName));
1239         sprintf (nv, "%s / %s",
1240                  resp->implementationName, assoc->init->implementation_name);
1241         resp->implementationName = nv;
1242     }
1243     if (assoc->init->implementation_version)
1244     {
1245         char *nv = (char *)
1246             odr_malloc (assoc->encode,
1247                         strlen(assoc->init->implementation_version) + 10 +
1248                                strlen(resp->implementationVersion));
1249         sprintf (nv, "YAZ %s / %s",
1250                  resp->implementationVersion,
1251                  assoc->init->implementation_version);
1252         resp->implementationVersion = nv;
1253     }
1254
1255     if (binitres->errcode)
1256     {
1257         yaz_log(LOG_LOG, "Connection rejected by backend.");
1258         *resp->result = 0;
1259         assoc->state = ASSOC_DEAD;
1260     }
1261     else
1262         assoc->state = ASSOC_UP;
1263     return apdu;
1264 }
1265
1266 /*
1267  * These functions should be merged.
1268  */
1269
1270 static void set_addinfo (Z_DefaultDiagFormat *dr, char *addinfo, ODR odr)
1271 {
1272     dr->which = Z_DefaultDiagFormat_v2Addinfo;
1273     dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
1274 }
1275
1276 /*
1277  * nonsurrogate diagnostic record.
1278  */
1279 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
1280 {
1281     Z_Records *rec = (Z_Records *)
1282         odr_malloc (assoc->encode, sizeof(*rec));
1283     int *err = odr_intdup(assoc->encode, error);
1284     Z_DiagRec *drec = (Z_DiagRec *)
1285         odr_malloc (assoc->encode, sizeof(*drec));
1286     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1287         odr_malloc (assoc->encode, sizeof(*dr));
1288
1289     yaz_log(LOG_LOG, "[%d] %s %s%s", error, diagbib1_str(error),
1290         addinfo ? " -- " : "", addinfo ? addinfo : "");
1291     rec->which = Z_Records_NSD;
1292     rec->u.nonSurrogateDiagnostic = dr;
1293     dr->diagnosticSetId =
1294         yaz_oidval_to_z3950oid (assoc->encode, CLASS_DIAGSET, VAL_BIB1);
1295     dr->condition = err;
1296     set_addinfo (dr, addinfo, assoc->encode);
1297     return rec;
1298 }
1299
1300 /*
1301  * surrogate diagnostic.
1302  */
1303 static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname,
1304                                           int error, char *addinfo)
1305 {
1306     Z_NamePlusRecord *rec = (Z_NamePlusRecord *)
1307         odr_malloc (assoc->encode, sizeof(*rec));
1308     int *err = odr_intdup(assoc->encode, error);
1309     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
1310     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1311         odr_malloc (assoc->encode, sizeof(*dr));
1312
1313     yaz_log(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
1314     rec->databaseName = dbname;
1315     rec->which = Z_NamePlusRecord_surrogateDiagnostic;
1316     rec->u.surrogateDiagnostic = drec;
1317     drec->which = Z_DiagRec_defaultFormat;
1318     drec->u.defaultFormat = dr;
1319     dr->diagnosticSetId =
1320         yaz_oidval_to_z3950oid (assoc->encode, CLASS_DIAGSET, VAL_BIB1);
1321     dr->condition = err;
1322     set_addinfo (dr, addinfo, assoc->encode);
1323
1324     return rec;
1325 }
1326
1327 /*
1328  * multiple nonsurrogate diagnostics.
1329  */
1330 static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo)
1331 {
1332     Z_DiagRecs *recs = (Z_DiagRecs *)odr_malloc (assoc->encode, sizeof(*recs));
1333     int *err = odr_intdup(assoc->encode, error);
1334     Z_DiagRec **recp = (Z_DiagRec **)odr_malloc (assoc->encode, sizeof(*recp));
1335     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
1336     Z_DefaultDiagFormat *rec = (Z_DefaultDiagFormat *)
1337         odr_malloc (assoc->encode, sizeof(*rec));
1338
1339     yaz_log(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo ? addinfo : "");
1340
1341     recs->num_diagRecs = 1;
1342     recs->diagRecs = recp;
1343     recp[0] = drec;
1344     drec->which = Z_DiagRec_defaultFormat;
1345     drec->u.defaultFormat = rec;
1346
1347     rec->diagnosticSetId =
1348         yaz_oidval_to_z3950oid (assoc->encode, CLASS_DIAGSET, VAL_BIB1);
1349     rec->condition = err;
1350
1351     rec->which = Z_DefaultDiagFormat_v2Addinfo;
1352     rec->u.v2Addinfo = odr_strdup (assoc->encode, addinfo ? addinfo : "");
1353     return recs;
1354 }
1355
1356 static Z_Records *pack_records(association *a, char *setname, int start,
1357                                int *num, Z_RecordComposition *comp,
1358                                int *next, int *pres, oid_value format,
1359                                Z_ReferenceId *referenceId,
1360                                int *oid)
1361 {
1362     int recno, total_length = 0, toget = *num, dumped_records = 0;
1363     Z_Records *records =
1364         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
1365     Z_NamePlusRecordList *reclist =
1366         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
1367     Z_NamePlusRecord **list =
1368         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
1369
1370     records->which = Z_Records_DBOSD;
1371     records->u.databaseOrSurDiagnostics = reclist;
1372     reclist->num_records = 0;
1373     reclist->records = list;
1374     *pres = Z_PRES_SUCCESS;
1375     *num = 0;
1376     *next = 0;
1377
1378     yaz_log(LOG_LOG, "Request to pack %d+%d+%s", start, toget, setname);
1379     yaz_log(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
1380         a->maximumRecordSize);
1381     for (recno = start; reclist->num_records < toget; recno++)
1382     {
1383         bend_fetch_rr freq;
1384         Z_NamePlusRecord *thisrec;
1385         int this_length = 0;
1386         /*
1387          * we get the number of bytes allocated on the stream before any
1388          * allocation done by the backend - this should give us a reasonable
1389          * idea of the total size of the data so far.
1390          */
1391         total_length = odr_total(a->encode) - dumped_records;
1392         freq.errcode = 0;
1393         freq.errstring = 0;
1394         freq.basename = 0;
1395         freq.len = 0;
1396         freq.record = 0;
1397         freq.last_in_set = 0;
1398         freq.setname = setname;
1399         freq.surrogate_flag = 0;
1400         freq.number = recno;
1401         freq.comp = comp;
1402         freq.request_format = format;
1403         freq.request_format_raw = oid;
1404         freq.output_format = format;
1405         freq.output_format_raw = 0;
1406         freq.stream = a->encode;
1407         freq.print = a->print;
1408         freq.surrogate_flag = 0;
1409         freq.referenceId = referenceId;
1410         (*a->init->bend_fetch)(a->backend, &freq);
1411         /* backend should be able to signal whether error is system-wide
1412            or only pertaining to current record */
1413         if (freq.errcode)
1414         {
1415             if (!freq.surrogate_flag)
1416             {
1417                 char s[20];
1418                 *pres = Z_PRES_FAILURE;
1419                 /* for 'present request out of range',
1420                    set addinfo to record position if not set */
1421                 if (freq.errcode == 13 && freq.errstring == 0)
1422                 {
1423                     sprintf (s, "%d", recno);
1424                     freq.errstring = s;
1425                 }
1426                 return diagrec(a, freq.errcode, freq.errstring);
1427             }
1428             reclist->records[reclist->num_records] =
1429                 surrogatediagrec(a, freq.basename, freq.errcode,
1430                                  freq.errstring);
1431             reclist->num_records++;
1432             *next = freq.last_in_set ? 0 : recno + 1;
1433             continue;
1434         }
1435         if (freq.len >= 0)
1436             this_length = freq.len;
1437         else
1438             this_length = odr_total(a->encode) - total_length;
1439         yaz_log(LOG_DEBUG, "  fetched record, len=%d, total=%d",
1440             this_length, total_length);
1441         if (this_length + total_length > a->preferredMessageSize)
1442         {
1443             /* record is small enough, really */
1444             if (this_length <= a->preferredMessageSize)
1445             {
1446                 yaz_log(LOG_DEBUG, "  Dropped last normal-sized record");
1447                 *pres = Z_PRES_PARTIAL_2;
1448                 break;
1449             }
1450             /* record can only be fetched by itself */
1451             if (this_length < a->maximumRecordSize)
1452             {
1453                 yaz_log(LOG_DEBUG, "  Record > prefmsgsz");
1454                 if (toget > 1)
1455                 {
1456                     yaz_log(LOG_DEBUG, "  Dropped it");
1457                     reclist->records[reclist->num_records] =
1458                          surrogatediagrec(a, freq.basename, 16, 0);
1459                     reclist->num_records++;
1460                     *next = freq.last_in_set ? 0 : recno + 1;
1461                     dumped_records += this_length;
1462                     continue;
1463                 }
1464             }
1465             else /* too big entirely */
1466             {
1467                 yaz_log(LOG_LOG, "Record > maxrcdsz this=%d max=%d", this_length, a->maximumRecordSize);
1468                 reclist->records[reclist->num_records] =
1469                     surrogatediagrec(a, freq.basename, 17, 0);
1470                 reclist->num_records++;
1471                 *next = freq.last_in_set ? 0 : recno + 1;
1472                 dumped_records += this_length;
1473                 continue;
1474             }
1475         }
1476
1477         if (!(thisrec = (Z_NamePlusRecord *)
1478               odr_malloc(a->encode, sizeof(*thisrec))))
1479             return 0;
1480         if (!(thisrec->databaseName = (char *)odr_malloc(a->encode,
1481             strlen(freq.basename) + 1)))
1482             return 0;
1483         strcpy(thisrec->databaseName, freq.basename);
1484         thisrec->which = Z_NamePlusRecord_databaseRecord;
1485
1486         if (freq.output_format_raw)
1487         {
1488             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
1489             freq.output_format = ident->value;
1490         }
1491         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
1492                                                  freq.record, freq.len);
1493         if (!thisrec->u.databaseRecord)
1494             return 0;
1495         reclist->records[reclist->num_records] = thisrec;
1496         reclist->num_records++;
1497         *next = freq.last_in_set ? 0 : recno + 1;
1498     }
1499     *num = reclist->num_records;
1500     return records;
1501 }
1502
1503 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
1504     int *fd)
1505 {
1506     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
1507     bend_search_rr *bsrr =
1508         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
1509
1510     yaz_log(LOG_LOG, "Got SearchRequest.");
1511     bsrr->fd = fd;
1512     bsrr->request = reqb;
1513     bsrr->association = assoc;
1514     bsrr->referenceId = req->referenceId;
1515     save_referenceId (reqb, bsrr->referenceId);
1516
1517     yaz_log (LOG_LOG, "ResultSet '%s'", req->resultSetName);
1518     if (req->databaseNames)
1519     {
1520         int i;
1521         for (i = 0; i < req->num_databaseNames; i++)
1522             yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1523     }
1524     yaz_log_zquery(req->query);
1525
1526     if (assoc->init->bend_search)
1527     {
1528         bsrr->setname = req->resultSetName;
1529         bsrr->replace_set = *req->replaceIndicator;
1530         bsrr->num_bases = req->num_databaseNames;
1531         bsrr->basenames = req->databaseNames;
1532         bsrr->query = req->query;
1533         bsrr->stream = assoc->encode;
1534         bsrr->decode = assoc->decode;
1535         bsrr->print = assoc->print;
1536         bsrr->errcode = 0;
1537         bsrr->hits = 0;
1538         bsrr->errstring = NULL;
1539         bsrr->search_info = NULL;
1540         (assoc->init->bend_search)(assoc->backend, bsrr);
1541         if (!bsrr->request)
1542             return 0;
1543     }
1544     return response_searchRequest(assoc, reqb, bsrr, fd);
1545 }
1546
1547 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
1548
1549 /*
1550  * Prepare a searchresponse based on the backend results. We probably want
1551  * to look at making the fetching of records nonblocking as well, but
1552  * so far, we'll keep things simple.
1553  * If bsrt is null, that means we're called in response to a communications
1554  * event, and we'll have to get the response for ourselves.
1555  */
1556 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
1557     bend_search_rr *bsrt, int *fd)
1558 {
1559     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
1560     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1561     Z_SearchResponse *resp = (Z_SearchResponse *)
1562         odr_malloc (assoc->encode, sizeof(*resp));
1563     int *nulint = odr_intdup (assoc->encode, 0);
1564     bool_t *sr = odr_intdup(assoc->encode, 1);
1565     int *next = odr_intdup(assoc->encode, 0);
1566     int *none = odr_intdup(assoc->encode, Z_RES_NONE);
1567
1568     apdu->which = Z_APDU_searchResponse;
1569     apdu->u.searchResponse = resp;
1570     resp->referenceId = req->referenceId;
1571     resp->additionalSearchInfo = 0;
1572     resp->otherInfo = 0;
1573     *fd = -1;
1574     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
1575     {
1576         yaz_log(LOG_FATAL, "Bad result from backend");
1577         return 0;
1578     }
1579     else if (bsrt->errcode)
1580     {
1581         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
1582         resp->resultCount = nulint;
1583         resp->numberOfRecordsReturned = nulint;
1584         resp->nextResultSetPosition = nulint;
1585         resp->searchStatus = nulint;
1586         resp->resultSetStatus = none;
1587         resp->presentStatus = 0;
1588     }
1589     else
1590     {
1591         int *toget = odr_intdup(assoc->encode, 0);
1592         int *presst = odr_intdup(assoc->encode, 0);
1593         Z_RecordComposition comp, *compp = 0;
1594
1595         yaz_log (LOG_LOG, "resultCount: %d", bsrt->hits);
1596
1597         resp->records = 0;
1598         resp->resultCount = &bsrt->hits;
1599
1600         comp.which = Z_RecordComp_simple;
1601         /* how many records does the user agent want, then? */
1602         if (bsrt->hits <= *req->smallSetUpperBound)
1603         {
1604             *toget = bsrt->hits;
1605             if ((comp.u.simple = req->smallSetElementSetNames))
1606                 compp = &comp;
1607         }
1608         else if (bsrt->hits < *req->largeSetLowerBound)
1609         {
1610             *toget = *req->mediumSetPresentNumber;
1611             if (*toget > bsrt->hits)
1612                 *toget = bsrt->hits;
1613             if ((comp.u.simple = req->mediumSetElementSetNames))
1614                 compp = &comp;
1615         }
1616         else
1617             *toget = 0;
1618
1619         if (*toget && !resp->records)
1620         {
1621             oident *prefformat;
1622             oid_value form;
1623
1624             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
1625                 form = VAL_NONE;
1626             else
1627                 form = prefformat->value;
1628             resp->records = pack_records(assoc, req->resultSetName, 1,
1629                 toget, compp, next, presst, form, req->referenceId,
1630                                          req->preferredRecordSyntax);
1631             if (!resp->records)
1632                 return 0;
1633             resp->numberOfRecordsReturned = toget;
1634             resp->nextResultSetPosition = next;
1635             resp->searchStatus = sr;
1636             resp->resultSetStatus = 0;
1637             resp->presentStatus = presst;
1638         }
1639         else
1640         {
1641             if (*resp->resultCount)
1642                 *next = 1;
1643             resp->numberOfRecordsReturned = nulint;
1644             resp->nextResultSetPosition = next;
1645             resp->searchStatus = sr;
1646             resp->resultSetStatus = 0;
1647             resp->presentStatus = 0;
1648         }
1649     }
1650     resp->additionalSearchInfo = bsrt->search_info;
1651     return apdu;
1652 }
1653
1654 /*
1655  * Maybe we got a little over-friendly when we designed bend_fetch to
1656  * get only one record at a time. Some backends can optimise multiple-record
1657  * fetches, and at any rate, there is some overhead involved in
1658  * all that selecting and hopping around. Problem is, of course, that the
1659  * frontend can't know ahead of time how many records it'll need to
1660  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
1661  * is downright lousy as a bulk data transfer protocol.
1662  *
1663  * To start with, we'll do the fetching of records from the backend
1664  * in one operation: To save some trips in and out of the event-handler,
1665  * and to simplify the interface to pack_records. At any rate, asynch
1666  * operation is more fun in operations that have an unpredictable execution
1667  * speed - which is normally more true for search than for present.
1668  */
1669 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
1670                                       int *fd)
1671 {
1672     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
1673     oident *prefformat;
1674     oid_value form;
1675     Z_APDU *apdu;
1676     Z_PresentResponse *resp;
1677     int *next;
1678     int *num;
1679
1680     yaz_log(LOG_LOG, "Got PresentRequest.");
1681
1682     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
1683         form = VAL_NONE;
1684     else
1685         form = prefformat->value;
1686     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
1687     resp->records = 0;
1688     resp->presentStatus = odr_intdup(assoc->encode, 0);
1689     if (assoc->init->bend_present)
1690     {
1691         bend_present_rr *bprr = (bend_present_rr *)
1692             nmem_malloc (reqb->request_mem, sizeof(*bprr));
1693         bprr->setname = req->resultSetId;
1694         bprr->start = *req->resultSetStartPoint;
1695         bprr->number = *req->numberOfRecordsRequested;
1696         bprr->format = form;
1697         bprr->comp = req->recordComposition;
1698         bprr->referenceId = req->referenceId;
1699         bprr->stream = assoc->encode;
1700         bprr->print = assoc->print;
1701         bprr->request = reqb;
1702         bprr->association = assoc;
1703         bprr->errcode = 0;
1704         bprr->errstring = NULL;
1705         (*assoc->init->bend_present)(assoc->backend, bprr);
1706
1707         if (!bprr->request)
1708             return 0;
1709         if (bprr->errcode)
1710         {
1711             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
1712             *resp->presentStatus = Z_PRES_FAILURE;
1713         }
1714     }
1715     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1716     next = odr_intdup(assoc->encode, 0);
1717     num = odr_intdup(assoc->encode, 0);
1718
1719     apdu->which = Z_APDU_presentResponse;
1720     apdu->u.presentResponse = resp;
1721     resp->referenceId = req->referenceId;
1722     resp->otherInfo = 0;
1723
1724     if (!resp->records)
1725     {
1726         *num = *req->numberOfRecordsRequested;
1727         resp->records =
1728             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
1729                      num, req->recordComposition, next, resp->presentStatus,
1730                          form, req->referenceId, req->preferredRecordSyntax);
1731     }
1732     if (!resp->records)
1733         return 0;
1734     resp->numberOfRecordsReturned = num;
1735     resp->nextResultSetPosition = next;
1736
1737     return apdu;
1738 }
1739
1740 /*
1741  * Scan was implemented rather in a hurry, and with support for only the basic
1742  * elements of the service in the backend API. Suggestions are welcome.
1743  */
1744 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
1745 {
1746     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
1747     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1748     Z_ScanResponse *res = (Z_ScanResponse *)
1749         odr_malloc (assoc->encode, sizeof(*res));
1750     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
1751     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
1752     Z_ListEntries *ents = (Z_ListEntries *)
1753         odr_malloc (assoc->encode, sizeof(*ents));
1754     Z_DiagRecs *diagrecs_p = NULL;
1755     oident *attset;
1756     bend_scan_rr *bsrr = (bend_scan_rr *)
1757         odr_malloc (assoc->encode, sizeof(*bsrr));
1758
1759     yaz_log(LOG_LOG, "Got ScanRequest");
1760
1761     apdu->which = Z_APDU_scanResponse;
1762     apdu->u.scanResponse = res;
1763     res->referenceId = req->referenceId;
1764
1765     /* if step is absent, set it to 0 */
1766     res->stepSize = odr_intdup(assoc->encode, 0);
1767     if (req->stepSize)
1768         *res->stepSize = *req->stepSize;
1769
1770     res->scanStatus = scanStatus;
1771     res->numberOfEntriesReturned = numberOfEntriesReturned;
1772     res->positionOfTerm = 0;
1773     res->entries = ents;
1774     ents->num_entries = 0;
1775     ents->entries = NULL;
1776     ents->num_nonsurrogateDiagnostics = 0;
1777     ents->nonsurrogateDiagnostics = NULL;
1778     res->attributeSet = 0;
1779     res->otherInfo = 0;
1780
1781     if (req->databaseNames)
1782     {
1783         int i;
1784         for (i = 0; i < req->num_databaseNames; i++)
1785             yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1786     }
1787     bsrr->num_bases = req->num_databaseNames;
1788     bsrr->basenames = req->databaseNames;
1789     bsrr->num_entries = *req->numberOfTermsRequested;
1790     bsrr->term = req->termListAndStartPoint;
1791     bsrr->referenceId = req->referenceId;
1792     bsrr->stream = assoc->encode;
1793     bsrr->print = assoc->print;
1794     bsrr->step_size = res->stepSize;
1795     if (req->attributeSet &&
1796         (attset = oid_getentbyoid(req->attributeSet)) &&
1797         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
1798         bsrr->attributeset = attset->value;
1799     else
1800         bsrr->attributeset = VAL_NONE;
1801     log_scan_term (req->termListAndStartPoint, bsrr->attributeset);
1802     bsrr->term_position = req->preferredPositionInResponse ?
1803         *req->preferredPositionInResponse : 1;
1804     ((int (*)(void *, bend_scan_rr *))
1805      (*assoc->init->bend_scan))(assoc->backend, bsrr);
1806     if (bsrr->errcode)
1807         diagrecs_p = diagrecs(assoc, bsrr->errcode, bsrr->errstring);
1808     else
1809     {
1810         int i;
1811         Z_Entry **tab = (Z_Entry **)
1812             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
1813
1814         if (bsrr->status == BEND_SCAN_PARTIAL)
1815             *scanStatus = Z_Scan_partial_5;
1816         else
1817             *scanStatus = Z_Scan_success;
1818         ents->entries = tab;
1819         ents->num_entries = bsrr->num_entries;
1820         res->numberOfEntriesReturned = &ents->num_entries;
1821         res->positionOfTerm = &bsrr->term_position;
1822         for (i = 0; i < bsrr->num_entries; i++)
1823         {
1824             Z_Entry *e;
1825             Z_TermInfo *t;
1826             Odr_oct *o;
1827
1828             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
1829             if (bsrr->entries[i].occurrences >= 0)
1830             {
1831                 e->which = Z_Entry_termInfo;
1832                 e->u.termInfo = t = (Z_TermInfo *)
1833                     odr_malloc(assoc->encode, sizeof(*t));
1834                 t->suggestedAttributes = 0;
1835                 t->displayTerm = 0;
1836                 t->alternativeTerm = 0;
1837                 t->byAttributes = 0;
1838                 t->otherTermInfo = 0;
1839                 t->globalOccurrences = &bsrr->entries[i].occurrences;
1840                 t->term = (Z_Term *)
1841                     odr_malloc(assoc->encode, sizeof(*t->term));
1842                 t->term->which = Z_Term_general;
1843                 t->term->u.general = o =
1844                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
1845                 o->buf = (unsigned char *)
1846                     odr_malloc(assoc->encode, o->len = o->size =
1847                                strlen(bsrr->entries[i].term));
1848                 memcpy(o->buf, bsrr->entries[i].term, o->len);
1849                 yaz_log(LOG_DEBUG, "  term #%d: '%s' (%d)", i,
1850                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
1851             }
1852             else
1853             {
1854                 Z_DiagRecs *drecs = diagrecs (assoc,
1855                                               bsrr->entries[i].errcode,
1856                                               bsrr->entries[i].errstring);
1857                 assert (drecs->num_diagRecs == 1);
1858                 e->which = Z_Entry_surrogateDiagnostic;
1859                 assert (drecs->diagRecs[0]);
1860                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
1861             }
1862         }
1863     }
1864     if (diagrecs_p)
1865     {
1866         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
1867         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
1868     }
1869     return apdu;
1870 }
1871
1872 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
1873     int *fd)
1874 {
1875     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
1876     Z_SortResponse *res = (Z_SortResponse *)
1877         odr_malloc (assoc->encode, sizeof(*res));
1878     bend_sort_rr *bsrr = (bend_sort_rr *)
1879         odr_malloc (assoc->encode, sizeof(*bsrr));
1880
1881     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1882
1883     yaz_log(LOG_LOG, "Got SortRequest.");
1884
1885     bsrr->num_input_setnames = req->num_inputResultSetNames;
1886     bsrr->input_setnames = req->inputResultSetNames;
1887     bsrr->referenceId = req->referenceId;
1888     bsrr->output_setname = req->sortedResultSetName;
1889     bsrr->sort_sequence = req->sortSequence;
1890     bsrr->stream = assoc->encode;
1891     bsrr->print = assoc->print;
1892
1893     bsrr->sort_status = Z_SortStatus_failure;
1894     bsrr->errcode = 0;
1895     bsrr->errstring = 0;
1896
1897     (*assoc->init->bend_sort)(assoc->backend, bsrr);
1898
1899     res->referenceId = bsrr->referenceId;
1900     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
1901     res->resultSetStatus = 0;
1902     if (bsrr->errcode)
1903     {
1904         Z_DiagRecs *dr = diagrecs (assoc, bsrr->errcode, bsrr->errstring);
1905         res->diagnostics = dr->diagRecs;
1906         res->num_diagnostics = dr->num_diagRecs;
1907     }
1908     else
1909     {
1910         res->num_diagnostics = 0;
1911         res->diagnostics = 0;
1912     }
1913     res->otherInfo = 0;
1914
1915     apdu->which = Z_APDU_sortResponse;
1916     apdu->u.sortResponse = res;
1917     return apdu;
1918 }
1919
1920 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
1921     int *fd)
1922 {
1923     Z_DeleteResultSetRequest *req =
1924         reqb->apdu_request->u.deleteResultSetRequest;
1925     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
1926         odr_malloc (assoc->encode, sizeof(*res));
1927     bend_delete_rr *bdrr = (bend_delete_rr *)
1928         odr_malloc (assoc->encode, sizeof(*bdrr));
1929     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1930
1931     yaz_log(LOG_LOG, "Got DeleteRequest.");
1932
1933     bdrr->num_setnames = req->num_resultSetList;
1934     bdrr->setnames = req->resultSetList;
1935     bdrr->stream = assoc->encode;
1936     bdrr->print = assoc->print;
1937     bdrr->function = *req->deleteFunction;
1938     bdrr->referenceId = req->referenceId;
1939     bdrr->statuses = 0;
1940     if (bdrr->num_setnames > 0)
1941     {
1942         int i;
1943         bdrr->statuses = (int*)
1944             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
1945                        bdrr->num_setnames);
1946         for (i = 0; i < bdrr->num_setnames; i++)
1947             bdrr->statuses[i] = 0;
1948     }
1949     (*assoc->init->bend_delete)(assoc->backend, bdrr);
1950
1951     res->referenceId = req->referenceId;
1952
1953     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
1954
1955     res->deleteListStatuses = 0;
1956     if (bdrr->num_setnames > 0)
1957     {
1958         int i;
1959         res->deleteListStatuses = (Z_ListStatuses *)
1960             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
1961         res->deleteListStatuses->num = bdrr->num_setnames;
1962         res->deleteListStatuses->elements =
1963             (Z_ListStatus **)
1964             odr_malloc (assoc->encode,
1965                         sizeof(*res->deleteListStatuses->elements) *
1966                         bdrr->num_setnames);
1967         for (i = 0; i<bdrr->num_setnames; i++)
1968         {
1969             res->deleteListStatuses->elements[i] =
1970                 (Z_ListStatus *)
1971                 odr_malloc (assoc->encode,
1972                             sizeof(**res->deleteListStatuses->elements));
1973             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
1974             res->deleteListStatuses->elements[i]->id =
1975                 odr_strdup (assoc->encode, bdrr->setnames[i]);
1976
1977         }
1978     }
1979     res->numberNotDeleted = 0;
1980     res->bulkStatuses = 0;
1981     res->deleteMessage = 0;
1982     res->otherInfo = 0;
1983
1984     apdu->which = Z_APDU_deleteResultSetResponse;
1985     apdu->u.deleteResultSetResponse = res;
1986     return apdu;
1987 }
1988
1989 static void process_close(association *assoc, request *reqb)
1990 {
1991     Z_Close *req = reqb->apdu_request->u.close;
1992     static char *reasons[] =
1993     {
1994         "finished",
1995         "shutdown",
1996         "systemProblem",
1997         "costLimit",
1998         "resources",
1999         "securityViolation",
2000         "protocolError",
2001         "lackOfActivity",
2002         "peerAbort",
2003         "unspecified"
2004     };
2005
2006     yaz_log(LOG_LOG, "Got Close, reason %s, message %s",
2007         reasons[*req->closeReason], req->diagnosticInformation ?
2008         req->diagnosticInformation : "NULL");
2009     if (assoc->version < 3) /* to make do_force respond with close */
2010         assoc->version = 3;
2011     do_close_req(assoc, Z_Close_finished,
2012                  "Association terminated by client", reqb);
2013 }
2014
2015 void save_referenceId (request *reqb, Z_ReferenceId *refid)
2016 {
2017     if (refid)
2018     {
2019         reqb->len_refid = refid->len;
2020         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
2021         memcpy (reqb->refid, refid->buf, refid->len);
2022     }
2023     else
2024     {
2025         reqb->len_refid = 0;
2026         reqb->refid = NULL;
2027     }
2028 }
2029
2030 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
2031 {
2032     process_z_response (a, req, res);
2033 }
2034
2035 bend_request bend_request_mk (bend_association a)
2036 {
2037     request *nreq = request_get (&a->outgoing);
2038     nreq->request_mem = nmem_create ();
2039     return nreq;
2040 }
2041
2042 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
2043 {
2044     Z_ReferenceId *id;
2045     if (!req->refid)
2046         return 0;
2047     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
2048     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
2049     id->len = id->size = req->len_refid;
2050     memcpy (id->buf, req->refid, req->len_refid);
2051     return id;
2052 }
2053
2054 void bend_request_destroy (bend_request *req)
2055 {
2056     nmem_destroy((*req)->request_mem);
2057     request_release(*req);
2058     *req = NULL;
2059 }
2060
2061 int bend_backend_respond (bend_association a, bend_request req)
2062 {
2063     char *msg;
2064     int r;
2065     r = process_z_request (a, req, &msg);
2066     if (r < 0)
2067         yaz_log (LOG_WARN, "%s", msg);
2068     return r;
2069 }
2070
2071 void bend_request_setdata(bend_request r, void *p)
2072 {
2073     r->clientData = p;
2074 }
2075
2076 void *bend_request_getdata(bend_request r)
2077 {
2078     return r->clientData;
2079 }
2080
2081 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
2082 {
2083     bend_segment_rr req;
2084
2085     req.segment = reqb->apdu_request->u.segmentRequest;
2086     req.stream = assoc->encode;
2087     req.decode = assoc->decode;
2088     req.print = assoc->print;
2089     req.association = assoc;
2090
2091     (*assoc->init->bend_segment)(assoc->backend, &req);
2092
2093     return 0;
2094 }
2095
2096 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
2097 {
2098     bend_esrequest_rr esrequest;
2099
2100     Z_ExtendedServicesRequest *req =
2101         reqb->apdu_request->u.extendedServicesRequest;
2102     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
2103
2104     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
2105
2106     yaz_log(LOG_DEBUG,"inside Process esRequest");
2107
2108     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
2109     esrequest.stream = assoc->encode;
2110     esrequest.decode = assoc->decode;
2111     esrequest.print = assoc->print;
2112     esrequest.errcode = 0;
2113     esrequest.errstring = NULL;
2114     esrequest.request = reqb;
2115     esrequest.association = assoc;
2116     esrequest.taskPackage = 0;
2117     esrequest.referenceId = req->referenceId;
2118
2119     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
2120
2121     /* If the response is being delayed, return NULL */
2122     if (esrequest.request == NULL)
2123         return(NULL);
2124
2125     resp->referenceId = req->referenceId;
2126
2127     if (esrequest.errcode == -1)
2128     {
2129         /* Backend service indicates request will be processed */
2130         yaz_log(LOG_DEBUG,"Request could be processed...Accepted !");
2131         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
2132     }
2133     else if (esrequest.errcode == 0)
2134     {
2135         /* Backend service indicates request will be processed */
2136         yaz_log(LOG_DEBUG,"Request could be processed...Done !");
2137         *resp->operationStatus = Z_ExtendedServicesResponse_done;
2138     }
2139     else
2140     {
2141         Z_DiagRecs *diagRecs = diagrecs (assoc, esrequest.errcode,
2142                                          esrequest.errstring);
2143
2144         /* Backend indicates error, request will not be processed */
2145         yaz_log(LOG_DEBUG,"Request could not be processed...failure !");
2146         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
2147         resp->num_diagnostics = diagRecs->num_diagRecs;
2148         resp->diagnostics = diagRecs->diagRecs;
2149     }
2150     /* Do something with the members of bend_extendedservice */
2151     if (esrequest.taskPackage)
2152         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
2153                                          (const char *)  esrequest.taskPackage,
2154                                           -1);
2155     yaz_log(LOG_DEBUG,"Send the result apdu");
2156     return apdu;
2157 }
2158