server/seshigh.c

   1 /*
   2  * Copyright (c) 1995-2003, Index Data
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: seshigh.c,v 1.137 2003-02-17 21:23:31 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     {
 185         exit (0);
 186     }
 187 }
 188
 189 static void do_close_req(association *a, int reason, char *message,
 190                          request *req)
 191 {
 192     Z_APDU apdu;
 193     Z_Close *cls = zget_Close(a->encode);
 194
 195     /* Purge request queue */
 196     while (request_deq(&a->incoming));
 197     while (request_deq(&a->outgoing));
 198     if (a->version >= 3)
 199     {
 200         yaz_log(LOG_LOG, "Sending Close PDU, reason=%d, message=%s",
 201             reason, message ? message : "none");
 202         apdu.which = Z_APDU_close;
 203         apdu.u.close = cls;
 204         *cls->closeReason = reason;
 205         cls->diagnosticInformation = message;
 206         process_z_response(a, req, &apdu);
 207         iochan_settimeout(a->client_chan, 20);
 208     }
 209     else
 210     {
 211         yaz_log(LOG_DEBUG, "v2 client. No Close PDU");
 212         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 213     }
 214     a->state = ASSOC_DEAD;
 215 }
 216
 217 static void do_close(association *a, int reason, char *message)
 218 {
 219     do_close_req (a, reason, message, request_get(&a->outgoing));
 220 }
 221
 222 /*
 223  * This is where PDUs from the client are read and the further
 224  * processing is initiated. Flow of control moves down through the
 225  * various process_* functions below, until the encoded result comes back up
 226  * to the output handler in here.
 227  *
 228  *  h     : the I/O channel that has an outstanding event.
 229  *  event : the current outstanding event.
 230  */
 231 void ir_session(IOCHAN h, int event)
 232 {
 233     int res;
 234     association *assoc = (association *)iochan_getdata(h);
 235     COMSTACK conn = assoc->client_link;
 236     request *req;
 237
 238     assert(h && conn && assoc);
 239     if (event == EVENT_TIMEOUT)
 240     {
 241         if (assoc->state != ASSOC_UP)
 242         {
 243             yaz_log(LOG_LOG, "Final timeout - closing connection.");
 244             cs_close(conn);
 245             destroy_association(assoc);
 246             iochan_destroy(h);
 247         }
 248         else
 249         {
 250             yaz_log(LOG_LOG, "Session idle too long. Sending close.");
 251             do_close(assoc, Z_Close_lackOfActivity, 0);
 252         }
 253         return;
 254     }
 255     if (event & assoc->cs_accept_mask)
 256     {
 257         yaz_log (LOG_DEBUG, "ir_session (accept)");
 258         if (!cs_accept (conn))
 259         {
 260             yaz_log (LOG_LOG, "accept failed");
 261             destroy_association(assoc);
 262             iochan_destroy(h);
 263         }
 264         iochan_clearflag (h, EVENT_OUTPUT|EVENT_OUTPUT);
 265         if (conn->io_pending)
 266         {   /* cs_accept didn't complete */
 267             assoc->cs_accept_mask =
 268                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 269                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 270
 271             iochan_setflag (h, assoc->cs_accept_mask);
 272         }
 273         else
 274         {   /* cs_accept completed. Prepare for reading (cs_get) */
 275             assoc->cs_accept_mask = 0;
 276             assoc->cs_get_mask = EVENT_INPUT;
 277             iochan_setflag (h, assoc->cs_get_mask);
 278         }
 279         return;
 280     }
 281     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 282     {
 283         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 284         {
 285             yaz_log(LOG_DEBUG, "ir_session (input)");
 286             /* We aren't speaking to this fellow */
 287             if (assoc->state == ASSOC_DEAD)
 288             {
 289                 yaz_log(LOG_LOG, "Closed connection after reject");
 290                 cs_close(conn);
 291                 destroy_association(assoc);
 292                 iochan_destroy(h);
 293                 return;
 294             }
 295             assoc->cs_get_mask = EVENT_INPUT;
 296             if ((res = cs_get(conn, &assoc->input_buffer,
 297                 &assoc->input_buffer_len)) <= 0)
 298             {
 299                 yaz_log(LOG_LOG, "Connection closed by client");
 300                 cs_close(conn);
 301                 destroy_association(assoc);
 302                 iochan_destroy(h);
 303                 return;
 304             }
 305             else if (res == 1) /* incomplete read - wait for more  */
 306             {
 307                 if (conn->io_pending & CS_WANT_WRITE)
 308                     assoc->cs_get_mask |= EVENT_OUTPUT;
 309                 iochan_setflag(h, assoc->cs_get_mask);
 310                 return;
 311             }
 312             if (cs_more(conn)) /* more stuff - call us again later, please */
 313                 iochan_setevent(h, EVENT_INPUT);
 314
 315             /* we got a complete PDU. Let's decode it */
 316             yaz_log(LOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 317                             assoc->input_buffer[0] & 0xff,
 318                             assoc->input_buffer[1] & 0xff,
 319                             assoc->input_buffer[2] & 0xff);
 320             req = request_get(&assoc->incoming); /* get a new request structure */
 321             odr_reset(assoc->decode);
 322             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 323             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 324             {
 325                 yaz_log(LOG_LOG, "ODR error on incoming PDU: %s [near byte %d] ",
 326                         odr_errmsg(odr_geterror(assoc->decode)),
 327                         odr_offset(assoc->decode));
 328                 if (assoc->decode->error != OHTTP)
 329                 {
 330                     yaz_log(LOG_LOG, "PDU dump:");
 331                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 332                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 333                 }
 334                 else
 335                 {
 336                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 337                     assoc->state = ASSOC_DEAD;
 338                     process_gdu_response(assoc, req, p);
 339                 }
 340                 return;
 341             }
 342             req->request_mem = odr_extract_mem(assoc->decode);
 343             if (assoc->print && !z_GDU(assoc->print, &req->gdu_request, 0, 0))
 344             {
 345                 yaz_log(LOG_WARN, "ODR print error: %s",
 346                     odr_errmsg(odr_geterror(assoc->print)));
 347                 odr_reset(assoc->print);
 348             }
 349             request_enq(&assoc->incoming, req);
 350         }
 351
 352         /* can we do something yet? */
 353         req = request_head(&assoc->incoming);
 354         if (req->state == REQUEST_IDLE)
 355         {
 356             request_deq(&assoc->incoming);
 357             process_gdu_request(assoc, req);
 358         }
 359     }
 360     if (event & assoc->cs_put_mask)
 361     {
 362         request *req = request_head(&assoc->outgoing);
 363
 364         assoc->cs_put_mask = 0;
 365         yaz_log(LOG_DEBUG, "ir_session (output)");
 366         req->state = REQUEST_PENDING;
 367         switch (res = cs_put(conn, req->response, req->len_response))
 368         {
 369         case -1:
 370             yaz_log(LOG_LOG, "Connection closed by client");
 371             cs_close(conn);
 372             destroy_association(assoc);
 373             iochan_destroy(h);
 374             break;
 375         case 0: /* all sent - release the request structure */
 376             yaz_log(LOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 377 #if 0
 378             yaz_log(LOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 379                     req->response);
 380 #endif
 381             nmem_destroy(req->request_mem);
 382             request_deq(&assoc->outgoing);
 383             request_release(req);
 384             if (!request_head(&assoc->outgoing))
 385             {   /* restore mask for cs_get operation ... */
 386                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 387                 iochan_setflag(h, assoc->cs_get_mask);
 388                 if (assoc->state == ASSOC_DEAD)
 389                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 390             }
 391             else
 392             {
 393                 assoc->cs_put_mask = EVENT_OUTPUT;
 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_Schema_uri;
 482     rr.comp->u.complex->generic->schema.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         int t;
 801         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
 802
 803         if (alive && isdigit(*alive))
 804             t = atoi(alive);
 805         else
 806             t = 30;
 807         if (t < 0 || t > 3600)
 808             t = 3600;
 809         iochan_settimeout(assoc->client_chan,t);
 810         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
 811     }
 812     process_gdu_response(assoc, req, p);
 813 }
 814
 815 static void process_gdu_request(association *assoc, request *req)
 816 {
 817     if (req->gdu_request->which == Z_GDU_Z3950)
 818     {
 819         char *msg = 0;
 820         req->apdu_request = req->gdu_request->u.z3950;
 821         if (process_z_request(assoc, req, &msg) < 0)
 822             do_close_req(assoc, Z_Close_systemProblem, msg, req);
 823     }
 824     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
 825         process_http_request(assoc, req);
 826     else
 827     {
 828         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
 829     }
 830 }
 831
 832 /*
 833  * Initiate request processing.
 834  */
 835 static int process_z_request(association *assoc, request *req, char **msg)
 836 {
 837     int fd = -1;
 838     Z_APDU *res;
 839     int retval;
 840
 841     *msg = "Unknown Error";
 842     assert(req && req->state == REQUEST_IDLE);
 843     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
 844     {
 845         *msg = "Missing InitRequest";
 846         return -1;
 847     }
 848     switch (req->apdu_request->which)
 849     {
 850     case Z_APDU_initRequest:
 851         iochan_settimeout(assoc->client_chan,
 852                           statserv_getcontrol()->idle_timeout * 60);
 853         res = process_initRequest(assoc, req); break;
 854     case Z_APDU_searchRequest:
 855         res = process_searchRequest(assoc, req, &fd); break;
 856     case Z_APDU_presentRequest:
 857         res = process_presentRequest(assoc, req, &fd); break;
 858     case Z_APDU_scanRequest:
 859         if (assoc->init->bend_scan)
 860             res = process_scanRequest(assoc, req, &fd);
 861         else
 862         {
 863             *msg = "Cannot handle Scan APDU";
 864             return -1;
 865         }
 866         break;
 867     case Z_APDU_extendedServicesRequest:
 868         if (assoc->init->bend_esrequest)
 869             res = process_ESRequest(assoc, req, &fd);
 870         else
 871         {
 872             *msg = "Cannot handle Extended Services APDU";
 873             return -1;
 874         }
 875         break;
 876     case Z_APDU_sortRequest:
 877         if (assoc->init->bend_sort)
 878             res = process_sortRequest(assoc, req, &fd);
 879         else
 880         {
 881             *msg = "Cannot handle Sort APDU";
 882             return -1;
 883         }
 884         break;
 885     case Z_APDU_close:
 886         process_close(assoc, req);
 887         return 0;
 888     case Z_APDU_deleteResultSetRequest:
 889         if (assoc->init->bend_delete)
 890             res = process_deleteRequest(assoc, req, &fd);
 891         else
 892         {
 893             *msg = "Cannot handle Delete APDU";
 894             return -1;
 895         }
 896         break;
 897     case Z_APDU_segmentRequest:
 898         if (assoc->init->bend_segment)
 899         {
 900             res = process_segmentRequest (assoc, req);
 901         }
 902         else
 903         {
 904             *msg = "Cannot handle Segment APDU";
 905             return -1;
 906         }
 907         break;
 908     default:
 909         *msg = "Bad APDU received";
 910         return -1;
 911     }
 912     if (res)
 913     {
 914         yaz_log(LOG_DEBUG, "  result immediately available");
 915         retval = process_z_response(assoc, req, res);
 916     }
 917     else if (fd < 0)
 918     {
 919         yaz_log(LOG_DEBUG, "  result unavailble");
 920         retval = 0;
 921     }
 922     else /* no result yet - one will be provided later */
 923     {
 924         IOCHAN chan;
 925
 926         /* Set up an I/O handler for the fd supplied by the backend */
 927
 928         yaz_log(LOG_DEBUG, "   establishing handler for result");
 929         req->state = REQUEST_PENDING;
 930         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT)))
 931             abort();
 932         iochan_setdata(chan, assoc);
 933         retval = 0;
 934     }
 935     return retval;
 936 }
 937
 938 /*
 939  * Handle message from the backend.
 940  */
 941 void backend_response(IOCHAN i, int event)
 942 {
 943     association *assoc = (association *)iochan_getdata(i);
 944     request *req = request_head(&assoc->incoming);
 945     Z_APDU *res;
 946     int fd;
 947
 948     yaz_log(LOG_DEBUG, "backend_response");
 949     assert(assoc && req && req->state != REQUEST_IDLE);
 950     /* determine what it is we're waiting for */
 951     switch (req->apdu_request->which)
 952     {
 953         case Z_APDU_searchRequest:
 954             res = response_searchRequest(assoc, req, 0, &fd); break;
 955 #if 0
 956         case Z_APDU_presentRequest:
 957             res = response_presentRequest(assoc, req, 0, &fd); break;
 958         case Z_APDU_scanRequest:
 959             res = response_scanRequest(assoc, req, 0, &fd); break;
 960 #endif
 961         default:
 962             yaz_log(LOG_WARN, "Serious programmer's lapse or bug");
 963             abort();
 964     }
 965     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
 966     {
 967         yaz_log(LOG_LOG, "Fatal error when talking to backend");
 968         do_close(assoc, Z_Close_systemProblem, 0);
 969         iochan_destroy(i);
 970         return;
 971     }
 972     else if (!res) /* no result yet - try again later */
 973     {
 974         yaz_log(LOG_DEBUG, "   no result yet");
 975         iochan_setfd(i, fd); /* in case fd has changed */
 976     }
 977 }
 978
 979 /*
 980  * Encode response, and transfer the request structure to the outgoing queue.
 981  */
 982 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
 983 {
 984     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
 985
 986     if (assoc->print && !z_GDU(assoc->print, &res, 0, 0))
 987     {
 988         yaz_log(LOG_WARN, "ODR print error: %s",
 989             odr_errmsg(odr_geterror(assoc->print)));
 990         odr_reset(assoc->print);
 991     }
 992     if (!z_GDU(assoc->encode, &res, 0, 0))
 993     {
 994         yaz_log(LOG_WARN, "ODR error when encoding response: %s",
 995             odr_errmsg(odr_geterror(assoc->decode)));
 996         return -1;
 997     }
 998     req->response = odr_getbuf(assoc->encode, &req->len_response,
 999         &req->size_response);
1000     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
1001     odr_reset(assoc->encode);
1002     req->state = REQUEST_IDLE;
1003     request_enq(&assoc->outgoing, req);
1004     /* turn the work over to the ir_session handler */
1005     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
1006     assoc->cs_put_mask = EVENT_OUTPUT;
1007     /* Is there more work to be done? give that to the input handler too */
1008 #if 1
1009     if (request_head(&assoc->incoming))
1010     {
1011         yaz_log (LOG_DEBUG, "more work to be done");
1012         iochan_setevent(assoc->client_chan, EVENT_WORK);
1013     }
1014 #endif
1015     return 0;
1016 }
1017
1018 /*
1019  * Encode response, and transfer the request structure to the outgoing queue.
1020  */
1021 static int process_z_response(association *assoc, request *req, Z_APDU *res)
1022 {
1023     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
1024
1025     if (assoc->print && !z_APDU(assoc->print, &res, 0, 0))
1026     {
1027         yaz_log(LOG_WARN, "ODR print error: %s",
1028             odr_errmsg(odr_geterror(assoc->print)));
1029         odr_reset(assoc->print);
1030     }
1031     if (!z_APDU(assoc->encode, &res, 0, 0))
1032     {
1033         yaz_log(LOG_WARN, "ODR error when encoding response: %s",
1034             odr_errmsg(odr_geterror(assoc->decode)));
1035         return -1;
1036     }
1037     req->response = odr_getbuf(assoc->encode, &req->len_response,
1038         &req->size_response);
1039     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
1040     odr_reset(assoc->encode);
1041     req->state = REQUEST_IDLE;
1042     request_enq(&assoc->outgoing, req);
1043     /* turn the work over to the ir_session handler */
1044     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
1045     assoc->cs_put_mask = EVENT_OUTPUT;
1046     /* Is there more work to be done? give that to the input handler too */
1047 #if 1
1048     if (request_head(&assoc->incoming))
1049     {
1050         yaz_log (LOG_DEBUG, "more work to be done");
1051         iochan_setevent(assoc->client_chan, EVENT_WORK);
1052     }
1053 #endif
1054     return 0;
1055 }
1056
1057 /*
1058  * Handle init request.
1059  * At the moment, we don't check the options
1060  * anywhere else in the code - we just try not to do anything that would
1061  * break a naive client. We'll toss 'em into the association block when
1062  * we need them there.
1063  */
1064 static Z_APDU *process_initRequest(association *assoc, request *reqb)
1065 {
1066     statserv_options_block *cb = statserv_getcontrol();
1067     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
1068     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
1069     Z_InitResponse *resp = apdu->u.initResponse;
1070     bend_initresult *binitres;
1071
1072     char options[140];
1073
1074     xfree (assoc->init);
1075     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
1076
1077     yaz_log(LOG_LOG, "Got initRequest");
1078     if (req->implementationId)
1079         yaz_log(LOG_LOG, "Id:        %s", req->implementationId);
1080     if (req->implementationName)
1081         yaz_log(LOG_LOG, "Name:      %s", req->implementationName);
1082     if (req->implementationVersion)
1083         yaz_log(LOG_LOG, "Version:   %s", req->implementationVersion);
1084
1085     assoc->init->stream = assoc->encode;
1086     assoc->init->print = assoc->print;
1087     assoc->init->auth = req->idAuthentication;
1088     assoc->init->referenceId = req->referenceId;
1089     assoc->init->implementation_version = 0;
1090     assoc->init->implementation_id = 0;
1091     assoc->init->implementation_name = 0;
1092     assoc->init->bend_sort = NULL;
1093     assoc->init->bend_search = NULL;
1094     assoc->init->bend_present = NULL;
1095     assoc->init->bend_esrequest = NULL;
1096     assoc->init->bend_delete = NULL;
1097     assoc->init->bend_scan = NULL;
1098     assoc->init->bend_segment = NULL;
1099     assoc->init->bend_fetch = NULL;
1100     assoc->init->charneg_request = NULL;
1101     assoc->init->charneg_response = NULL;
1102     assoc->init->decode = assoc->decode;
1103
1104     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
1105     {
1106         Z_CharSetandLanguageNegotiation *negotiation =
1107             yaz_get_charneg_record (req->otherInfo);
1108         if (negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
1109             assoc->init->charneg_request = negotiation;
1110     }
1111
1112     assoc->init->peer_name =
1113         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
1114     if (!(binitres = (*cb->bend_init)(assoc->init)))
1115     {
1116         yaz_log(LOG_WARN, "Bad response from backend.");
1117         return 0;
1118     }
1119
1120     assoc->backend = binitres->handle;
1121     if ((assoc->init->bend_sort))
1122         yaz_log (LOG_DEBUG, "Sort handler installed");
1123     if ((assoc->init->bend_search))
1124         yaz_log (LOG_DEBUG, "Search handler installed");
1125     if ((assoc->init->bend_present))
1126         yaz_log (LOG_DEBUG, "Present handler installed");
1127     if ((assoc->init->bend_esrequest))
1128         yaz_log (LOG_DEBUG, "ESRequest handler installed");
1129     if ((assoc->init->bend_delete))
1130         yaz_log (LOG_DEBUG, "Delete handler installed");
1131     if ((assoc->init->bend_scan))
1132         yaz_log (LOG_DEBUG, "Scan handler installed");
1133     if ((assoc->init->bend_segment))
1134         yaz_log (LOG_DEBUG, "Segment handler installed");
1135
1136     resp->referenceId = req->referenceId;
1137     *options = '\0';
1138     /* let's tell the client what we can do */
1139     if (ODR_MASK_GET(req->options, Z_Options_search))
1140     {
1141         ODR_MASK_SET(resp->options, Z_Options_search);
1142         strcat(options, "srch");
1143     }
1144     if (ODR_MASK_GET(req->options, Z_Options_present))
1145     {
1146         ODR_MASK_SET(resp->options, Z_Options_present);
1147         strcat(options, " prst");
1148     }
1149     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
1150         assoc->init->bend_delete)
1151     {
1152         ODR_MASK_SET(resp->options, Z_Options_delSet);
1153         strcat(options, " del");
1154     }
1155     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
1156         assoc->init->bend_esrequest)
1157     {
1158         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
1159         strcat (options, " extendedServices");
1160     }
1161     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
1162     {
1163         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
1164         strcat(options, " namedresults");
1165     }
1166     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
1167     {
1168         ODR_MASK_SET(resp->options, Z_Options_scan);
1169         strcat(options, " scan");
1170     }
1171     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
1172     {
1173         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
1174         strcat(options, " concurrop");
1175     }
1176     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
1177     {
1178         ODR_MASK_SET(resp->options, Z_Options_sort);
1179         strcat(options, " sort");
1180     }
1181
1182     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
1183         && assoc->init->charneg_response)
1184     {
1185         Z_OtherInformation **p;
1186         Z_OtherInformationUnit *p0;
1187
1188         yaz_oi_APDU(apdu, &p);
1189
1190         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
1191             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
1192
1193             p0->which = Z_OtherInfo_externallyDefinedInfo;
1194             p0->information.externallyDefinedInfo =
1195                 assoc->init->charneg_response;
1196         }
1197         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
1198         strcat(options, " negotiation");
1199     }
1200
1201     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
1202     {
1203         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
1204         assoc->version = 2; /* 1 & 2 are equivalent */
1205     }
1206     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
1207     {
1208         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
1209         assoc->version = 2;
1210     }
1211     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
1212     {
1213         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
1214         assoc->version = 3;
1215     }
1216
1217     yaz_log(LOG_LOG, "Negotiated to v%d: %s", assoc->version, options);
1218     assoc->maximumRecordSize = *req->maximumRecordSize;
1219     if (assoc->maximumRecordSize > control_block->maxrecordsize)
1220         assoc->maximumRecordSize = control_block->maxrecordsize;
1221     assoc->preferredMessageSize = *req->preferredMessageSize;
1222     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
1223         assoc->preferredMessageSize = assoc->maximumRecordSize;
1224
1225 #if 0
1226     assoc->maximumRecordSize = 3000000;
1227     assoc->preferredMessageSize = 3000000;
1228 #endif
1229
1230     resp->preferredMessageSize = &assoc->preferredMessageSize;
1231     resp->maximumRecordSize = &assoc->maximumRecordSize;
1232
1233     resp->implementationName = "GFS/YAZ";
1234
1235     if (assoc->init->implementation_id)
1236     {
1237         char *nv = (char *)
1238             odr_malloc (assoc->encode,
1239                         strlen(assoc->init->implementation_id) + 10 +
1240                                strlen(resp->implementationId));
1241         sprintf (nv, "%s / %s",
1242                  resp->implementationId, assoc->init->implementation_id);
1243         resp->implementationId = nv;
1244     }
1245     if (assoc->init->implementation_name)
1246     {
1247         char *nv = (char *)
1248             odr_malloc (assoc->encode,
1249                         strlen(assoc->init->implementation_name) + 10 +
1250                                strlen(resp->implementationName));
1251         sprintf (nv, "%s / %s",
1252                  resp->implementationName, assoc->init->implementation_name);
1253         resp->implementationName = nv;
1254     }
1255     if (assoc->init->implementation_version)
1256     {
1257         char *nv = (char *)
1258             odr_malloc (assoc->encode,
1259                         strlen(assoc->init->implementation_version) + 10 +
1260                                strlen(resp->implementationVersion));
1261         sprintf (nv, "YAZ %s / %s",
1262                  resp->implementationVersion,
1263                  assoc->init->implementation_version);
1264         resp->implementationVersion = nv;
1265     }
1266
1267     if (binitres->errcode)
1268     {
1269         yaz_log(LOG_LOG, "Connection rejected by backend.");
1270         *resp->result = 0;
1271         assoc->state = ASSOC_DEAD;
1272     }
1273     else
1274         assoc->state = ASSOC_UP;
1275     return apdu;
1276 }
1277
1278 /*
1279  * These functions should be merged.
1280  */
1281
1282 static void set_addinfo (Z_DefaultDiagFormat *dr, char *addinfo, ODR odr)
1283 {
1284     dr->which = Z_DefaultDiagFormat_v2Addinfo;
1285     dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
1286 }
1287
1288 /*
1289  * nonsurrogate diagnostic record.
1290  */
1291 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
1292 {
1293     Z_Records *rec = (Z_Records *)
1294         odr_malloc (assoc->encode, sizeof(*rec));
1295     int *err = odr_intdup(assoc->encode, error);
1296     Z_DiagRec *drec = (Z_DiagRec *)
1297         odr_malloc (assoc->encode, sizeof(*drec));
1298     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1299         odr_malloc (assoc->encode, sizeof(*dr));
1300
1301     yaz_log(LOG_LOG, "[%d] %s %s%s", error, diagbib1_str(error),
1302         addinfo ? " -- " : "", addinfo ? addinfo : "");
1303     rec->which = Z_Records_NSD;
1304     rec->u.nonSurrogateDiagnostic = dr;
1305     dr->diagnosticSetId =
1306         yaz_oidval_to_z3950oid (assoc->encode, CLASS_DIAGSET, VAL_BIB1);
1307     dr->condition = err;
1308     set_addinfo (dr, addinfo, assoc->encode);
1309     return rec;
1310 }
1311
1312 /*
1313  * surrogate diagnostic.
1314  */
1315 static Z_NamePlusRecord *surrogatediagrec(association *assoc, char *dbname,
1316                                           int error, char *addinfo)
1317 {
1318     Z_NamePlusRecord *rec = (Z_NamePlusRecord *)
1319         odr_malloc (assoc->encode, sizeof(*rec));
1320     int *err = odr_intdup(assoc->encode, error);
1321     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
1322     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1323         odr_malloc (assoc->encode, sizeof(*dr));
1324
1325     yaz_log(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
1326     rec->databaseName = dbname;
1327     rec->which = Z_NamePlusRecord_surrogateDiagnostic;
1328     rec->u.surrogateDiagnostic = drec;
1329     drec->which = Z_DiagRec_defaultFormat;
1330     drec->u.defaultFormat = dr;
1331     dr->diagnosticSetId =
1332         yaz_oidval_to_z3950oid (assoc->encode, CLASS_DIAGSET, VAL_BIB1);
1333     dr->condition = err;
1334     set_addinfo (dr, addinfo, assoc->encode);
1335
1336     return rec;
1337 }
1338
1339 /*
1340  * multiple nonsurrogate diagnostics.
1341  */
1342 static Z_DiagRecs *diagrecs(association *assoc, int error, char *addinfo)
1343 {
1344     Z_DiagRecs *recs = (Z_DiagRecs *)odr_malloc (assoc->encode, sizeof(*recs));
1345     int *err = odr_intdup(assoc->encode, error);
1346     Z_DiagRec **recp = (Z_DiagRec **)odr_malloc (assoc->encode, sizeof(*recp));
1347     Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (assoc->encode, sizeof(*drec));
1348     Z_DefaultDiagFormat *rec = (Z_DefaultDiagFormat *)
1349         odr_malloc (assoc->encode, sizeof(*rec));
1350
1351     yaz_log(LOG_DEBUG, "DiagRecs: %d -- %s", error, addinfo ? addinfo : "");
1352
1353     recs->num_diagRecs = 1;
1354     recs->diagRecs = recp;
1355     recp[0] = drec;
1356     drec->which = Z_DiagRec_defaultFormat;
1357     drec->u.defaultFormat = rec;
1358
1359     rec->diagnosticSetId =
1360         yaz_oidval_to_z3950oid (assoc->encode, CLASS_DIAGSET, VAL_BIB1);
1361     rec->condition = err;
1362
1363     rec->which = Z_DefaultDiagFormat_v2Addinfo;
1364     rec->u.v2Addinfo = odr_strdup (assoc->encode, addinfo ? addinfo : "");
1365     return recs;
1366 }
1367
1368 static Z_Records *pack_records(association *a, char *setname, int start,
1369                                int *num, Z_RecordComposition *comp,
1370                                int *next, int *pres, oid_value format,
1371                                Z_ReferenceId *referenceId,
1372                                int *oid)
1373 {
1374     int recno, total_length = 0, toget = *num, dumped_records = 0;
1375     Z_Records *records =
1376         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
1377     Z_NamePlusRecordList *reclist =
1378         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
1379     Z_NamePlusRecord **list =
1380         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
1381
1382     records->which = Z_Records_DBOSD;
1383     records->u.databaseOrSurDiagnostics = reclist;
1384     reclist->num_records = 0;
1385     reclist->records = list;
1386     *pres = Z_PRES_SUCCESS;
1387     *num = 0;
1388     *next = 0;
1389
1390     yaz_log(LOG_LOG, "Request to pack %d+%d+%s", start, toget, setname);
1391     yaz_log(LOG_DEBUG, "pms=%d, mrs=%d", a->preferredMessageSize,
1392         a->maximumRecordSize);
1393     for (recno = start; reclist->num_records < toget; recno++)
1394     {
1395         bend_fetch_rr freq;
1396         Z_NamePlusRecord *thisrec;
1397         int this_length = 0;
1398         /*
1399          * we get the number of bytes allocated on the stream before any
1400          * allocation done by the backend - this should give us a reasonable
1401          * idea of the total size of the data so far.
1402          */
1403         total_length = odr_total(a->encode) - dumped_records;
1404         freq.errcode = 0;
1405         freq.errstring = 0;
1406         freq.basename = 0;
1407         freq.len = 0;
1408         freq.record = 0;
1409         freq.last_in_set = 0;
1410         freq.setname = setname;
1411         freq.surrogate_flag = 0;
1412         freq.number = recno;
1413         freq.comp = comp;
1414         freq.request_format = format;
1415         freq.request_format_raw = oid;
1416         freq.output_format = format;
1417         freq.output_format_raw = 0;
1418         freq.stream = a->encode;
1419         freq.print = a->print;
1420         freq.surrogate_flag = 0;
1421         freq.referenceId = referenceId;
1422         (*a->init->bend_fetch)(a->backend, &freq);
1423         /* backend should be able to signal whether error is system-wide
1424            or only pertaining to current record */
1425         if (freq.errcode)
1426         {
1427             if (!freq.surrogate_flag)
1428             {
1429                 char s[20];
1430                 *pres = Z_PRES_FAILURE;
1431                 /* for 'present request out of range',
1432                    set addinfo to record position if not set */
1433                 if (freq.errcode == 13 && freq.errstring == 0)
1434                 {
1435                     sprintf (s, "%d", recno);
1436                     freq.errstring = s;
1437                 }
1438                 return diagrec(a, freq.errcode, freq.errstring);
1439             }
1440             reclist->records[reclist->num_records] =
1441                 surrogatediagrec(a, freq.basename, freq.errcode,
1442                                  freq.errstring);
1443             reclist->num_records++;
1444             *next = freq.last_in_set ? 0 : recno + 1;
1445             continue;
1446         }
1447         if (freq.len >= 0)
1448             this_length = freq.len;
1449         else
1450             this_length = odr_total(a->encode) - total_length;
1451         yaz_log(LOG_DEBUG, "  fetched record, len=%d, total=%d",
1452             this_length, total_length);
1453         if (this_length + total_length > a->preferredMessageSize)
1454         {
1455             /* record is small enough, really */
1456             if (this_length <= a->preferredMessageSize)
1457             {
1458                 yaz_log(LOG_DEBUG, "  Dropped last normal-sized record");
1459                 *pres = Z_PRES_PARTIAL_2;
1460                 break;
1461             }
1462             /* record can only be fetched by itself */
1463             if (this_length < a->maximumRecordSize)
1464             {
1465                 yaz_log(LOG_DEBUG, "  Record > prefmsgsz");
1466                 if (toget > 1)
1467                 {
1468                     yaz_log(LOG_DEBUG, "  Dropped it");
1469                     reclist->records[reclist->num_records] =
1470                          surrogatediagrec(a, freq.basename, 16, 0);
1471                     reclist->num_records++;
1472                     *next = freq.last_in_set ? 0 : recno + 1;
1473                     dumped_records += this_length;
1474                     continue;
1475                 }
1476             }
1477             else /* too big entirely */
1478             {
1479                 yaz_log(LOG_LOG, "Record > maxrcdsz this=%d max=%d", this_length, a->maximumRecordSize);
1480                 reclist->records[reclist->num_records] =
1481                     surrogatediagrec(a, freq.basename, 17, 0);
1482                 reclist->num_records++;
1483                 *next = freq.last_in_set ? 0 : recno + 1;
1484                 dumped_records += this_length;
1485                 continue;
1486             }
1487         }
1488
1489         if (!(thisrec = (Z_NamePlusRecord *)
1490               odr_malloc(a->encode, sizeof(*thisrec))))
1491             return 0;
1492         if (!(thisrec->databaseName = (char *)odr_malloc(a->encode,
1493             strlen(freq.basename) + 1)))
1494             return 0;
1495         strcpy(thisrec->databaseName, freq.basename);
1496         thisrec->which = Z_NamePlusRecord_databaseRecord;
1497
1498         if (freq.output_format_raw)
1499         {
1500             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
1501             freq.output_format = ident->value;
1502         }
1503         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
1504                                                  freq.record, freq.len);
1505         if (!thisrec->u.databaseRecord)
1506             return 0;
1507         reclist->records[reclist->num_records] = thisrec;
1508         reclist->num_records++;
1509         *next = freq.last_in_set ? 0 : recno + 1;
1510     }
1511     *num = reclist->num_records;
1512     return records;
1513 }
1514
1515 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
1516     int *fd)
1517 {
1518     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
1519     bend_search_rr *bsrr =
1520         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
1521
1522     yaz_log(LOG_LOG, "Got SearchRequest.");
1523     bsrr->fd = fd;
1524     bsrr->request = reqb;
1525     bsrr->association = assoc;
1526     bsrr->referenceId = req->referenceId;
1527     save_referenceId (reqb, bsrr->referenceId);
1528
1529     yaz_log (LOG_LOG, "ResultSet '%s'", req->resultSetName);
1530     if (req->databaseNames)
1531     {
1532         int i;
1533         for (i = 0; i < req->num_databaseNames; i++)
1534             yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1535     }
1536     yaz_log_zquery(req->query);
1537
1538     if (assoc->init->bend_search)
1539     {
1540         bsrr->setname = req->resultSetName;
1541         bsrr->replace_set = *req->replaceIndicator;
1542         bsrr->num_bases = req->num_databaseNames;
1543         bsrr->basenames = req->databaseNames;
1544         bsrr->query = req->query;
1545         bsrr->stream = assoc->encode;
1546         bsrr->decode = assoc->decode;
1547         bsrr->print = assoc->print;
1548         bsrr->errcode = 0;
1549         bsrr->hits = 0;
1550         bsrr->errstring = NULL;
1551         bsrr->search_info = NULL;
1552         (assoc->init->bend_search)(assoc->backend, bsrr);
1553         if (!bsrr->request)
1554             return 0;
1555     }
1556     return response_searchRequest(assoc, reqb, bsrr, fd);
1557 }
1558
1559 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
1560
1561 /*
1562  * Prepare a searchresponse based on the backend results. We probably want
1563  * to look at making the fetching of records nonblocking as well, but
1564  * so far, we'll keep things simple.
1565  * If bsrt is null, that means we're called in response to a communications
1566  * event, and we'll have to get the response for ourselves.
1567  */
1568 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
1569     bend_search_rr *bsrt, int *fd)
1570 {
1571     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
1572     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1573     Z_SearchResponse *resp = (Z_SearchResponse *)
1574         odr_malloc (assoc->encode, sizeof(*resp));
1575     int *nulint = odr_intdup (assoc->encode, 0);
1576     bool_t *sr = odr_intdup(assoc->encode, 1);
1577     int *next = odr_intdup(assoc->encode, 0);
1578     int *none = odr_intdup(assoc->encode, Z_RES_NONE);
1579
1580     apdu->which = Z_APDU_searchResponse;
1581     apdu->u.searchResponse = resp;
1582     resp->referenceId = req->referenceId;
1583     resp->additionalSearchInfo = 0;
1584     resp->otherInfo = 0;
1585     *fd = -1;
1586     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
1587     {
1588         yaz_log(LOG_FATAL, "Bad result from backend");
1589         return 0;
1590     }
1591     else if (bsrt->errcode)
1592     {
1593         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
1594         resp->resultCount = nulint;
1595         resp->numberOfRecordsReturned = nulint;
1596         resp->nextResultSetPosition = nulint;
1597         resp->searchStatus = nulint;
1598         resp->resultSetStatus = none;
1599         resp->presentStatus = 0;
1600     }
1601     else
1602     {
1603         int *toget = odr_intdup(assoc->encode, 0);
1604         int *presst = odr_intdup(assoc->encode, 0);
1605         Z_RecordComposition comp, *compp = 0;
1606
1607         yaz_log (LOG_LOG, "resultCount: %d", bsrt->hits);
1608
1609         resp->records = 0;
1610         resp->resultCount = &bsrt->hits;
1611
1612         comp.which = Z_RecordComp_simple;
1613         /* how many records does the user agent want, then? */
1614         if (bsrt->hits <= *req->smallSetUpperBound)
1615         {
1616             *toget = bsrt->hits;
1617             if ((comp.u.simple = req->smallSetElementSetNames))
1618                 compp = &comp;
1619         }
1620         else if (bsrt->hits < *req->largeSetLowerBound)
1621         {
1622             *toget = *req->mediumSetPresentNumber;
1623             if (*toget > bsrt->hits)
1624                 *toget = bsrt->hits;
1625             if ((comp.u.simple = req->mediumSetElementSetNames))
1626                 compp = &comp;
1627         }
1628         else
1629             *toget = 0;
1630
1631         if (*toget && !resp->records)
1632         {
1633             oident *prefformat;
1634             oid_value form;
1635
1636             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
1637                 form = VAL_NONE;
1638             else
1639                 form = prefformat->value;
1640             resp->records = pack_records(assoc, req->resultSetName, 1,
1641                 toget, compp, next, presst, form, req->referenceId,
1642                                          req->preferredRecordSyntax);
1643             if (!resp->records)
1644                 return 0;
1645             resp->numberOfRecordsReturned = toget;
1646             resp->nextResultSetPosition = next;
1647             resp->searchStatus = sr;
1648             resp->resultSetStatus = 0;
1649             resp->presentStatus = presst;
1650         }
1651         else
1652         {
1653             if (*resp->resultCount)
1654                 *next = 1;
1655             resp->numberOfRecordsReturned = nulint;
1656             resp->nextResultSetPosition = next;
1657             resp->searchStatus = sr;
1658             resp->resultSetStatus = 0;
1659             resp->presentStatus = 0;
1660         }
1661     }
1662     resp->additionalSearchInfo = bsrt->search_info;
1663     return apdu;
1664 }
1665
1666 /*
1667  * Maybe we got a little over-friendly when we designed bend_fetch to
1668  * get only one record at a time. Some backends can optimise multiple-record
1669  * fetches, and at any rate, there is some overhead involved in
1670  * all that selecting and hopping around. Problem is, of course, that the
1671  * frontend can't know ahead of time how many records it'll need to
1672  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
1673  * is downright lousy as a bulk data transfer protocol.
1674  *
1675  * To start with, we'll do the fetching of records from the backend
1676  * in one operation: To save some trips in and out of the event-handler,
1677  * and to simplify the interface to pack_records. At any rate, asynch
1678  * operation is more fun in operations that have an unpredictable execution
1679  * speed - which is normally more true for search than for present.
1680  */
1681 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
1682                                       int *fd)
1683 {
1684     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
1685     oident *prefformat;
1686     oid_value form;
1687     Z_APDU *apdu;
1688     Z_PresentResponse *resp;
1689     int *next;
1690     int *num;
1691
1692     yaz_log(LOG_LOG, "Got PresentRequest.");
1693
1694     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
1695         form = VAL_NONE;
1696     else
1697         form = prefformat->value;
1698     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
1699     resp->records = 0;
1700     resp->presentStatus = odr_intdup(assoc->encode, 0);
1701     if (assoc->init->bend_present)
1702     {
1703         bend_present_rr *bprr = (bend_present_rr *)
1704             nmem_malloc (reqb->request_mem, sizeof(*bprr));
1705         bprr->setname = req->resultSetId;
1706         bprr->start = *req->resultSetStartPoint;
1707         bprr->number = *req->numberOfRecordsRequested;
1708         bprr->format = form;
1709         bprr->comp = req->recordComposition;
1710         bprr->referenceId = req->referenceId;
1711         bprr->stream = assoc->encode;
1712         bprr->print = assoc->print;
1713         bprr->request = reqb;
1714         bprr->association = assoc;
1715         bprr->errcode = 0;
1716         bprr->errstring = NULL;
1717         (*assoc->init->bend_present)(assoc->backend, bprr);
1718
1719         if (!bprr->request)
1720             return 0;
1721         if (bprr->errcode)
1722         {
1723             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
1724             *resp->presentStatus = Z_PRES_FAILURE;
1725         }
1726     }
1727     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1728     next = odr_intdup(assoc->encode, 0);
1729     num = odr_intdup(assoc->encode, 0);
1730
1731     apdu->which = Z_APDU_presentResponse;
1732     apdu->u.presentResponse = resp;
1733     resp->referenceId = req->referenceId;
1734     resp->otherInfo = 0;
1735
1736     if (!resp->records)
1737     {
1738         *num = *req->numberOfRecordsRequested;
1739         resp->records =
1740             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
1741                      num, req->recordComposition, next, resp->presentStatus,
1742                          form, req->referenceId, req->preferredRecordSyntax);
1743     }
1744     if (!resp->records)
1745         return 0;
1746     resp->numberOfRecordsReturned = num;
1747     resp->nextResultSetPosition = next;
1748
1749     return apdu;
1750 }
1751
1752 /*
1753  * Scan was implemented rather in a hurry, and with support for only the basic
1754  * elements of the service in the backend API. Suggestions are welcome.
1755  */
1756 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
1757 {
1758     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
1759     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1760     Z_ScanResponse *res = (Z_ScanResponse *)
1761         odr_malloc (assoc->encode, sizeof(*res));
1762     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
1763     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
1764     Z_ListEntries *ents = (Z_ListEntries *)
1765         odr_malloc (assoc->encode, sizeof(*ents));
1766     Z_DiagRecs *diagrecs_p = NULL;
1767     oident *attset;
1768     bend_scan_rr *bsrr = (bend_scan_rr *)
1769         odr_malloc (assoc->encode, sizeof(*bsrr));
1770
1771     yaz_log(LOG_LOG, "Got ScanRequest");
1772
1773     apdu->which = Z_APDU_scanResponse;
1774     apdu->u.scanResponse = res;
1775     res->referenceId = req->referenceId;
1776
1777     /* if step is absent, set it to 0 */
1778     res->stepSize = odr_intdup(assoc->encode, 0);
1779     if (req->stepSize)
1780         *res->stepSize = *req->stepSize;
1781
1782     res->scanStatus = scanStatus;
1783     res->numberOfEntriesReturned = numberOfEntriesReturned;
1784     res->positionOfTerm = 0;
1785     res->entries = ents;
1786     ents->num_entries = 0;
1787     ents->entries = NULL;
1788     ents->num_nonsurrogateDiagnostics = 0;
1789     ents->nonsurrogateDiagnostics = NULL;
1790     res->attributeSet = 0;
1791     res->otherInfo = 0;
1792
1793     if (req->databaseNames)
1794     {
1795         int i;
1796         for (i = 0; i < req->num_databaseNames; i++)
1797             yaz_log (LOG_LOG, "Database '%s'", req->databaseNames[i]);
1798     }
1799     bsrr->num_bases = req->num_databaseNames;
1800     bsrr->basenames = req->databaseNames;
1801     bsrr->num_entries = *req->numberOfTermsRequested;
1802     bsrr->term = req->termListAndStartPoint;
1803     bsrr->referenceId = req->referenceId;
1804     bsrr->stream = assoc->encode;
1805     bsrr->print = assoc->print;
1806     bsrr->step_size = res->stepSize;
1807     if (req->attributeSet &&
1808         (attset = oid_getentbyoid(req->attributeSet)) &&
1809         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
1810         bsrr->attributeset = attset->value;
1811     else
1812         bsrr->attributeset = VAL_NONE;
1813     log_scan_term (req->termListAndStartPoint, bsrr->attributeset);
1814     bsrr->term_position = req->preferredPositionInResponse ?
1815         *req->preferredPositionInResponse : 1;
1816     ((int (*)(void *, bend_scan_rr *))
1817      (*assoc->init->bend_scan))(assoc->backend, bsrr);
1818     if (bsrr->errcode)
1819         diagrecs_p = diagrecs(assoc, bsrr->errcode, bsrr->errstring);
1820     else
1821     {
1822         int i;
1823         Z_Entry **tab = (Z_Entry **)
1824             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
1825
1826         if (bsrr->status == BEND_SCAN_PARTIAL)
1827             *scanStatus = Z_Scan_partial_5;
1828         else
1829             *scanStatus = Z_Scan_success;
1830         ents->entries = tab;
1831         ents->num_entries = bsrr->num_entries;
1832         res->numberOfEntriesReturned = &ents->num_entries;
1833         res->positionOfTerm = &bsrr->term_position;
1834         for (i = 0; i < bsrr->num_entries; i++)
1835         {
1836             Z_Entry *e;
1837             Z_TermInfo *t;
1838             Odr_oct *o;
1839
1840             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
1841             if (bsrr->entries[i].occurrences >= 0)
1842             {
1843                 e->which = Z_Entry_termInfo;
1844                 e->u.termInfo = t = (Z_TermInfo *)
1845                     odr_malloc(assoc->encode, sizeof(*t));
1846                 t->suggestedAttributes = 0;
1847                 t->displayTerm = 0;
1848                 t->alternativeTerm = 0;
1849                 t->byAttributes = 0;
1850                 t->otherTermInfo = 0;
1851                 t->globalOccurrences = &bsrr->entries[i].occurrences;
1852                 t->term = (Z_Term *)
1853                     odr_malloc(assoc->encode, sizeof(*t->term));
1854                 t->term->which = Z_Term_general;
1855                 t->term->u.general = o =
1856                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
1857                 o->buf = (unsigned char *)
1858                     odr_malloc(assoc->encode, o->len = o->size =
1859                                strlen(bsrr->entries[i].term));
1860                 memcpy(o->buf, bsrr->entries[i].term, o->len);
1861                 yaz_log(LOG_DEBUG, "  term #%d: '%s' (%d)", i,
1862                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
1863             }
1864             else
1865             {
1866                 Z_DiagRecs *drecs = diagrecs (assoc,
1867                                               bsrr->entries[i].errcode,
1868                                               bsrr->entries[i].errstring);
1869                 assert (drecs->num_diagRecs == 1);
1870                 e->which = Z_Entry_surrogateDiagnostic;
1871                 assert (drecs->diagRecs[0]);
1872                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
1873             }
1874         }
1875     }
1876     if (diagrecs_p)
1877     {
1878         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
1879         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
1880     }
1881     return apdu;
1882 }
1883
1884 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
1885     int *fd)
1886 {
1887     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
1888     Z_SortResponse *res = (Z_SortResponse *)
1889         odr_malloc (assoc->encode, sizeof(*res));
1890     bend_sort_rr *bsrr = (bend_sort_rr *)
1891         odr_malloc (assoc->encode, sizeof(*bsrr));
1892
1893     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1894
1895     yaz_log(LOG_LOG, "Got SortRequest.");
1896
1897     bsrr->num_input_setnames = req->num_inputResultSetNames;
1898     bsrr->input_setnames = req->inputResultSetNames;
1899     bsrr->referenceId = req->referenceId;
1900     bsrr->output_setname = req->sortedResultSetName;
1901     bsrr->sort_sequence = req->sortSequence;
1902     bsrr->stream = assoc->encode;
1903     bsrr->print = assoc->print;
1904
1905     bsrr->sort_status = Z_SortStatus_failure;
1906     bsrr->errcode = 0;
1907     bsrr->errstring = 0;
1908
1909     (*assoc->init->bend_sort)(assoc->backend, bsrr);
1910
1911     res->referenceId = bsrr->referenceId;
1912     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
1913     res->resultSetStatus = 0;
1914     if (bsrr->errcode)
1915     {
1916         Z_DiagRecs *dr = diagrecs (assoc, bsrr->errcode, bsrr->errstring);
1917         res->diagnostics = dr->diagRecs;
1918         res->num_diagnostics = dr->num_diagRecs;
1919     }
1920     else
1921     {
1922         res->num_diagnostics = 0;
1923         res->diagnostics = 0;
1924     }
1925     res->otherInfo = 0;
1926
1927     apdu->which = Z_APDU_sortResponse;
1928     apdu->u.sortResponse = res;
1929     return apdu;
1930 }
1931
1932 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
1933     int *fd)
1934 {
1935     Z_DeleteResultSetRequest *req =
1936         reqb->apdu_request->u.deleteResultSetRequest;
1937     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
1938         odr_malloc (assoc->encode, sizeof(*res));
1939     bend_delete_rr *bdrr = (bend_delete_rr *)
1940         odr_malloc (assoc->encode, sizeof(*bdrr));
1941     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
1942
1943     yaz_log(LOG_LOG, "Got DeleteRequest.");
1944
1945     bdrr->num_setnames = req->num_resultSetList;
1946     bdrr->setnames = req->resultSetList;
1947     bdrr->stream = assoc->encode;
1948     bdrr->print = assoc->print;
1949     bdrr->function = *req->deleteFunction;
1950     bdrr->referenceId = req->referenceId;
1951     bdrr->statuses = 0;
1952     if (bdrr->num_setnames > 0)
1953     {
1954         int i;
1955         bdrr->statuses = (int*)
1956             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
1957                        bdrr->num_setnames);
1958         for (i = 0; i < bdrr->num_setnames; i++)
1959             bdrr->statuses[i] = 0;
1960     }
1961     (*assoc->init->bend_delete)(assoc->backend, bdrr);
1962
1963     res->referenceId = req->referenceId;
1964
1965     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
1966
1967     res->deleteListStatuses = 0;
1968     if (bdrr->num_setnames > 0)
1969     {
1970         int i;
1971         res->deleteListStatuses = (Z_ListStatuses *)
1972             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
1973         res->deleteListStatuses->num = bdrr->num_setnames;
1974         res->deleteListStatuses->elements =
1975             (Z_ListStatus **)
1976             odr_malloc (assoc->encode,
1977                         sizeof(*res->deleteListStatuses->elements) *
1978                         bdrr->num_setnames);
1979         for (i = 0; i<bdrr->num_setnames; i++)
1980         {
1981             res->deleteListStatuses->elements[i] =
1982                 (Z_ListStatus *)
1983                 odr_malloc (assoc->encode,
1984                             sizeof(**res->deleteListStatuses->elements));
1985             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
1986             res->deleteListStatuses->elements[i]->id =
1987                 odr_strdup (assoc->encode, bdrr->setnames[i]);
1988
1989         }
1990     }
1991     res->numberNotDeleted = 0;
1992     res->bulkStatuses = 0;
1993     res->deleteMessage = 0;
1994     res->otherInfo = 0;
1995
1996     apdu->which = Z_APDU_deleteResultSetResponse;
1997     apdu->u.deleteResultSetResponse = res;
1998     return apdu;
1999 }
2000
2001 static void process_close(association *assoc, request *reqb)
2002 {
2003     Z_Close *req = reqb->apdu_request->u.close;
2004     static char *reasons[] =
2005     {
2006         "finished",
2007         "shutdown",
2008         "systemProblem",
2009         "costLimit",
2010         "resources",
2011         "securityViolation",
2012         "protocolError",
2013         "lackOfActivity",
2014         "peerAbort",
2015         "unspecified"
2016     };
2017
2018     yaz_log(LOG_LOG, "Got Close, reason %s, message %s",
2019         reasons[*req->closeReason], req->diagnosticInformation ?
2020         req->diagnosticInformation : "NULL");
2021     if (assoc->version < 3) /* to make do_force respond with close */
2022         assoc->version = 3;
2023     do_close_req(assoc, Z_Close_finished,
2024                  "Association terminated by client", reqb);
2025 }
2026
2027 void save_referenceId (request *reqb, Z_ReferenceId *refid)
2028 {
2029     if (refid)
2030     {
2031         reqb->len_refid = refid->len;
2032         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
2033         memcpy (reqb->refid, refid->buf, refid->len);
2034     }
2035     else
2036     {
2037         reqb->len_refid = 0;
2038         reqb->refid = NULL;
2039     }
2040 }
2041
2042 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
2043 {
2044     process_z_response (a, req, res);
2045 }
2046
2047 bend_request bend_request_mk (bend_association a)
2048 {
2049     request *nreq = request_get (&a->outgoing);
2050     nreq->request_mem = nmem_create ();
2051     return nreq;
2052 }
2053
2054 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
2055 {
2056     Z_ReferenceId *id;
2057     if (!req->refid)
2058         return 0;
2059     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
2060     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
2061     id->len = id->size = req->len_refid;
2062     memcpy (id->buf, req->refid, req->len_refid);
2063     return id;
2064 }
2065
2066 void bend_request_destroy (bend_request *req)
2067 {
2068     nmem_destroy((*req)->request_mem);
2069     request_release(*req);
2070     *req = NULL;
2071 }
2072
2073 int bend_backend_respond (bend_association a, bend_request req)
2074 {
2075     char *msg;
2076     int r;
2077     r = process_z_request (a, req, &msg);
2078     if (r < 0)
2079         yaz_log (LOG_WARN, "%s", msg);
2080     return r;
2081 }
2082
2083 void bend_request_setdata(bend_request r, void *p)
2084 {
2085     r->clientData = p;
2086 }
2087
2088 void *bend_request_getdata(bend_request r)
2089 {
2090     return r->clientData;
2091 }
2092
2093 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
2094 {
2095     bend_segment_rr req;
2096
2097     req.segment = reqb->apdu_request->u.segmentRequest;
2098     req.stream = assoc->encode;
2099     req.decode = assoc->decode;
2100     req.print = assoc->print;
2101     req.association = assoc;
2102
2103     (*assoc->init->bend_segment)(assoc->backend, &req);
2104
2105     return 0;
2106 }
2107
2108 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
2109 {
2110     bend_esrequest_rr esrequest;
2111
2112     Z_ExtendedServicesRequest *req =
2113         reqb->apdu_request->u.extendedServicesRequest;
2114     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
2115
2116     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
2117
2118     yaz_log(LOG_DEBUG,"inside Process esRequest");
2119
2120     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
2121     esrequest.stream = assoc->encode;
2122     esrequest.decode = assoc->decode;
2123     esrequest.print = assoc->print;
2124     esrequest.errcode = 0;
2125     esrequest.errstring = NULL;
2126     esrequest.request = reqb;
2127     esrequest.association = assoc;
2128     esrequest.taskPackage = 0;
2129     esrequest.referenceId = req->referenceId;
2130
2131     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
2132
2133     /* If the response is being delayed, return NULL */
2134     if (esrequest.request == NULL)
2135         return(NULL);
2136
2137     resp->referenceId = req->referenceId;
2138
2139     if (esrequest.errcode == -1)
2140     {
2141         /* Backend service indicates request will be processed */
2142         yaz_log(LOG_DEBUG,"Request could be processed...Accepted !");
2143         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
2144     }
2145     else if (esrequest.errcode == 0)
2146     {
2147         /* Backend service indicates request will be processed */
2148         yaz_log(LOG_DEBUG,"Request could be processed...Done !");
2149         *resp->operationStatus = Z_ExtendedServicesResponse_done;
2150     }
2151     else
2152     {
2153         Z_DiagRecs *diagRecs = diagrecs (assoc, esrequest.errcode,
2154                                          esrequest.errstring);
2155
2156         /* Backend indicates error, request will not be processed */
2157         yaz_log(LOG_DEBUG,"Request could not be processed...failure !");
2158         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
2159         resp->num_diagnostics = diagRecs->num_diagRecs;
2160         resp->diagnostics = diagRecs->diagRecs;
2161     }
2162     /* Do something with the members of bend_extendedservice */
2163     if (esrequest.taskPackage)
2164         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
2165                                          (const char *)  esrequest.taskPackage,
2166                                           -1);
2167     yaz_log(LOG_DEBUG,"Send the result apdu");
2168     return apdu;
2169 }
2170