src/seshigh.c

   1 /*
   2  * Copyright (C) 1995-2005, Index Data ApS
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: seshigh.c,v 1.84 2006-05-30 04:50:04 quinn Exp $
   6  */
   7 /**
   8  * \file seshigh.c
   9  * \brief Implements GFS session logic.
  10  *
  11  * Frontend server logic.
  12  *
  13  * This code receives incoming APDUs, and handles client requests by means
  14  * of the backend API.
  15  *
  16  * Some of the code is getting quite involved, compared to simpler servers -
  17  * primarily because it is asynchronous both in the communication with
  18  * the user and the backend. We think the complexity will pay off in
  19  * the form of greater flexibility when more asynchronous facilities
  20  * are implemented.
  21  *
  22  * Memory management has become somewhat involved. In the simple case, where
  23  * only one PDU is pending at a time, it will simply reuse the same memory,
  24  * once it has found its working size. When we enable multiple concurrent
  25  * operations, perhaps even with multiple parallel calls to the backend, it
  26  * will maintain a pool of buffers for encoding and decoding, trying to
  27  * minimize memory allocation/deallocation during normal operation.
  28  *
  29  */
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34 #include <ctype.h>
  35
  36 #if HAVE_SYS_TYPES_H
  37 #include <sys/types.h>
  38 #endif
  39 #if HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifdef WIN32
  44 #include <io.h>
  45 #define S_ISREG(x) (x & _S_IFREG)
  46 #include <process.h>
  47 #endif
  48
  49 #if HAVE_UNISTD_H
  50 #include <unistd.h>
  51 #endif
  52
  53 #if HAVE_XML2
  54 #include <libxml/parser.h>
  55 #include <libxml/tree.h>
  56 #endif
  57
  58 #include <yaz/yconfig.h>
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75
  76 #include <yaz/srw.h>
  77 #include <yaz/backend.h>
  78
  79 static void process_gdu_request(association *assoc, request *req);
  80 static int process_z_request(association *assoc, request *req, char **msg);
  81 void backend_response(IOCHAN i, int event);
  82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  85 static Z_External *init_diagnostics(ODR odr, int errcode,
  86                                     const char *errstring);
  87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  88     int *fd);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90     bend_search_rr *bsrr, int *fd);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  92     int *fd);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  95 static void process_close(association *assoc, request *reqb);
  96 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  98     int *fd);
  99 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 100
 101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 102
 103 /* dynamic logging levels */
 104 static int logbits_set = 0;
 105 static int log_session = 0;
 106 static int log_request = 0; /* one-line logs for requests */
 107 static int log_requestdetail = 0;  /* more detailed stuff */
 108
 109 /** get_logbits sets global loglevel bits */
 110 static void get_logbits()
 111 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 112     if (!logbits_set)
 113     {
 114         logbits_set = 1;
 115         log_session = yaz_log_module_level("session");
 116         log_request = yaz_log_module_level("request");
 117         log_requestdetail = yaz_log_module_level("requestdetail");
 118     }
 119 }
 120
 121 static void wr_diag(WRBUF w, int error, const char *addinfo)
 122 {
 123     wrbuf_printf(w, "ERROR [%d] %s%s%s",
 124                  error, diagbib1_str(error),
 125                  addinfo ? "--" : "", addinfo ? addinfo : "");
 126 }
 127
 128
 129 /*
 130  * Create and initialize a new association-handle.
 131  *  channel  : iochannel for the current line.
 132  *  link     : communications channel.
 133  * Returns: 0 or a new association handle.
 134  */
 135 association *create_association(IOCHAN channel, COMSTACK link,
 136                                 const char *apdufile)
 137 {
 138     association *anew;
 139
 140     if (!logbits_set)
 141         get_logbits();
 142     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 143         return 0;
 144     anew->init = 0;
 145     anew->version = 0;
 146     anew->last_control = 0;
 147     anew->client_chan = channel;
 148     anew->client_link = link;
 149     anew->cs_get_mask = 0;
 150     anew->cs_put_mask = 0;
 151     anew->cs_accept_mask = 0;
 152     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 153         !(anew->encode = odr_createmem(ODR_ENCODE)))
 154         return 0;
 155     if (apdufile && *apdufile)
 156     {
 157         FILE *f;
 158
 159         if (!(anew->print = odr_createmem(ODR_PRINT)))
 160             return 0;
 161         if (*apdufile == '@')
 162         {
 163             odr_setprint(anew->print, yaz_log_file());
 164         }
 165         else if (*apdufile != '-')
 166         {
 167             char filename[256];
 168             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 169             if (!(f = fopen(filename, "w")))
 170             {
 171                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 172                 return 0;
 173             }
 174             setvbuf(f, 0, _IONBF, 0);
 175             odr_setprint(anew->print, f);
 176         }
 177     }
 178     else
 179         anew->print = 0;
 180     anew->input_buffer = 0;
 181     anew->input_buffer_len = 0;
 182     anew->backend = 0;
 183     anew->state = ASSOC_NEW;
 184     request_initq(&anew->incoming);
 185     request_initq(&anew->outgoing);
 186     anew->proto = cs_getproto(link);
 187     anew->server = 0;
 188     return anew;
 189 }
 190
 191 /*
 192  * Free association and release resources.
 193  */
 194 void destroy_association(association *h)
 195 {
 196     statserv_options_block *cb = statserv_getcontrol();
 197     request *req;
 198
 199     xfree(h->init);
 200     odr_destroy(h->decode);
 201     odr_destroy(h->encode);
 202     if (h->print)
 203         odr_destroy(h->print);
 204     if (h->input_buffer)
 205     xfree(h->input_buffer);
 206     if (h->backend)
 207         (*cb->bend_close)(h->backend);
 208     while ((req = request_deq(&h->incoming)))
 209         request_release(req);
 210     while ((req = request_deq(&h->outgoing)))
 211         request_release(req);
 212     request_delq(&h->incoming);
 213     request_delq(&h->outgoing);
 214     xfree(h);
 215     xmalloc_trav("session closed");
 216     if (cb && cb->one_shot)
 217     {
 218         exit (0);
 219     }
 220 }
 221
 222 static void do_close_req(association *a, int reason, char *message,
 223                          request *req)
 224 {
 225     Z_APDU apdu;
 226     Z_Close *cls = zget_Close(a->encode);
 227
 228     /* Purge request queue */
 229     while (request_deq(&a->incoming));
 230     while (request_deq(&a->outgoing));
 231     if (a->version >= 3)
 232     {
 233         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 234             reason, message ? message : "none");
 235         apdu.which = Z_APDU_close;
 236         apdu.u.close = cls;
 237         *cls->closeReason = reason;
 238         cls->diagnosticInformation = message;
 239         process_z_response(a, req, &apdu);
 240         iochan_settimeout(a->client_chan, 20);
 241     }
 242     else
 243     {
 244         request_release(req);
 245         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 246         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 247         a->cs_put_mask = 0;
 248     }
 249     a->state = ASSOC_DEAD;
 250 }
 251
 252 static void do_close(association *a, int reason, char *message)
 253 {
 254     request *req = request_get(&a->outgoing);
 255     do_close_req (a, reason, message, req);
 256 }
 257
 258 /*
 259  * This is where PDUs from the client are read and the further
 260  * processing is initiated. Flow of control moves down through the
 261  * various process_* functions below, until the encoded result comes back up
 262  * to the output handler in here.
 263  *
 264  *  h     : the I/O channel that has an outstanding event.
 265  *  event : the current outstanding event.
 266  */
 267 void ir_session(IOCHAN h, int event)
 268 {
 269     int res;
 270     association *assoc = (association *)iochan_getdata(h);
 271     COMSTACK conn = assoc->client_link;
 272     request *req;
 273
 274     assert(h && conn && assoc);
 275     if (event == EVENT_TIMEOUT)
 276     {
 277         if (assoc->state != ASSOC_UP)
 278         {
 279             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 280             /* do we need to lod this at all */
 281             cs_close(conn);
 282             destroy_association(assoc);
 283             iochan_destroy(h);
 284         }
 285         else
 286         {
 287             yaz_log(log_session, "Session idle too long. Sending close.");
 288             do_close(assoc, Z_Close_lackOfActivity, 0);
 289         }
 290         return;
 291     }
 292     if (event & assoc->cs_accept_mask)
 293     {
 294         if (!cs_accept (conn))
 295         {
 296             yaz_log (YLOG_WARN, "accept failed");
 297             destroy_association(assoc);
 298             iochan_destroy(h);
 299         }
 300         iochan_clearflag (h, EVENT_OUTPUT);
 301         if (conn->io_pending)
 302         {   /* cs_accept didn't complete */
 303             assoc->cs_accept_mask =
 304                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 305                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 306
 307             iochan_setflag (h, assoc->cs_accept_mask);
 308         }
 309         else
 310         {   /* cs_accept completed. Prepare for reading (cs_get) */
 311             assoc->cs_accept_mask = 0;
 312             assoc->cs_get_mask = EVENT_INPUT;
 313             iochan_setflag (h, assoc->cs_get_mask);
 314         }
 315         return;
 316     }
 317     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 318     {
 319         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 320         {
 321             yaz_log(YLOG_DEBUG, "ir_session (input)");
 322             /* We aren't speaking to this fellow */
 323             if (assoc->state == ASSOC_DEAD)
 324             {
 325                 yaz_log(log_session, "Connection closed - end of session");
 326                 cs_close(conn);
 327                 destroy_association(assoc);
 328                 iochan_destroy(h);
 329                 return;
 330             }
 331             assoc->cs_get_mask = EVENT_INPUT;
 332             if ((res = cs_get(conn, &assoc->input_buffer,
 333                 &assoc->input_buffer_len)) <= 0)
 334             {
 335                 yaz_log(log_session, "Connection closed by client");
 336                 cs_close(conn);
 337                 destroy_association(assoc);
 338                 iochan_destroy(h);
 339                 return;
 340             }
 341             else if (res == 1) /* incomplete read - wait for more  */
 342             {
 343                 if (conn->io_pending & CS_WANT_WRITE)
 344                     assoc->cs_get_mask |= EVENT_OUTPUT;
 345                 iochan_setflag(h, assoc->cs_get_mask);
 346                 return;
 347             }
 348             if (cs_more(conn)) /* more stuff - call us again later, please */
 349                 iochan_setevent(h, EVENT_INPUT);
 350
 351             /* we got a complete PDU. Let's decode it */
 352             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 353                             assoc->input_buffer[0] & 0xff,
 354                             assoc->input_buffer[1] & 0xff,
 355                             assoc->input_buffer[2] & 0xff);
 356             req = request_get(&assoc->incoming); /* get a new request */
 357             odr_reset(assoc->decode);
 358             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 359             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 360             {
 361                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 362                         "[near byte %ld] ",
 363                         odr_errmsg(odr_geterror(assoc->decode)),
 364                         odr_getelement(assoc->decode),
 365                         (long) odr_offset(assoc->decode));
 366                 if (assoc->decode->error != OHTTP)
 367                 {
 368                     yaz_log(YLOG_WARN, "PDU dump:");
 369                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 370                     request_release(req);
 371                     do_close(assoc, Z_Close_protocolError,"Malformed package");
 372                 }
 373                 else
 374                 {
 375                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 376                     assoc->state = ASSOC_DEAD;
 377                     process_gdu_response(assoc, req, p);
 378                 }
 379                 return;
 380             }
 381             req->request_mem = odr_extract_mem(assoc->decode);
 382             if (assoc->print)
 383             {
 384                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 385                     yaz_log(YLOG_WARN, "ODR print error: %s",
 386                        odr_errmsg(odr_geterror(assoc->print)));
 387                 odr_reset(assoc->print);
 388             }
 389             request_enq(&assoc->incoming, req);
 390         }
 391
 392         /* can we do something yet? */
 393         req = request_head(&assoc->incoming);
 394         if (req->state == REQUEST_IDLE)
 395         {
 396             request_deq(&assoc->incoming);
 397             process_gdu_request(assoc, req);
 398         }
 399     }
 400     if (event & assoc->cs_put_mask)
 401     {
 402         request *req = request_head(&assoc->outgoing);
 403
 404         assoc->cs_put_mask = 0;
 405         yaz_log(YLOG_DEBUG, "ir_session (output)");
 406         req->state = REQUEST_PENDING;
 407         switch (res = cs_put(conn, req->response, req->len_response))
 408         {
 409         case -1:
 410             yaz_log(log_session, "Connection closed by client");
 411             cs_close(conn);
 412             destroy_association(assoc);
 413             iochan_destroy(h);
 414             break;
 415         case 0: /* all sent - release the request structure */
 416             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 417 #if 0
 418             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 419                     req->response);
 420 #endif
 421             nmem_destroy(req->request_mem);
 422             request_deq(&assoc->outgoing);
 423             request_release(req);
 424             if (!request_head(&assoc->outgoing))
 425             {   /* restore mask for cs_get operation ... */
 426                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 427                 iochan_setflag(h, assoc->cs_get_mask);
 428                 if (assoc->state == ASSOC_DEAD)
 429                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 430             }
 431             else
 432             {
 433                 assoc->cs_put_mask = EVENT_OUTPUT;
 434             }
 435             break;
 436         default:
 437             if (conn->io_pending & CS_WANT_WRITE)
 438                 assoc->cs_put_mask |= EVENT_OUTPUT;
 439             if (conn->io_pending & CS_WANT_READ)
 440                 assoc->cs_put_mask |= EVENT_INPUT;
 441             iochan_setflag(h, assoc->cs_put_mask);
 442         }
 443     }
 444     if (event & EVENT_EXCEPT)
 445     {
 446         yaz_log(YLOG_WARN, "ir_session (exception)");
 447         cs_close(conn);
 448         destroy_association(assoc);
 449         iochan_destroy(h);
 450     }
 451 }
 452
 453 static int process_z_request(association *assoc, request *req, char **msg);
 454
 455
 456 static void assoc_init_reset(association *assoc)
 457 {
 458     xfree (assoc->init);
 459     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 460
 461     assoc->init->stream = assoc->encode;
 462     assoc->init->print = assoc->print;
 463     assoc->init->auth = 0;
 464     assoc->init->referenceId = 0;
 465     assoc->init->implementation_version = 0;
 466     assoc->init->implementation_id = 0;
 467     assoc->init->implementation_name = 0;
 468     assoc->init->bend_sort = NULL;
 469     assoc->init->bend_search = NULL;
 470     assoc->init->bend_present = NULL;
 471     assoc->init->bend_esrequest = NULL;
 472     assoc->init->bend_delete = NULL;
 473     assoc->init->bend_scan = NULL;
 474     assoc->init->bend_segment = NULL;
 475     assoc->init->bend_fetch = NULL;
 476     assoc->init->bend_explain = NULL;
 477     assoc->init->bend_srw_scan = NULL;
 478     assoc->init->bend_srw_update = NULL;
 479
 480     assoc->init->charneg_request = NULL;
 481     assoc->init->charneg_response = NULL;
 482
 483     assoc->init->decode = assoc->decode;
 484     assoc->init->peer_name =
 485         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 486
 487     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 488 }
 489
 490 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 491 {
 492     statserv_options_block *cb = statserv_getcontrol();
 493     if (!assoc->init)
 494     {
 495         const char *encoding = "UTF-8";
 496         Z_External *ce;
 497         bend_initresult *binitres;
 498
 499         yaz_log(YLOG_LOG, "srw_bend_init config=%s", cb->configname);
 500         assoc_init_reset(assoc);
 501
 502         assoc->maximumRecordSize = 3000000;
 503         assoc->preferredMessageSize = 3000000;
 504
 505         if (sr->username)
 506         {
 507             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 508             int len;
 509
 510             len = strlen(sr->username) + 1;
 511             if (sr->password)
 512                 len += strlen(sr->password) + 2;
 513             auth->which = Z_IdAuthentication_open;
 514             auth->u.open = odr_malloc(assoc->decode, len);
 515             strcpy(auth->u.open, sr->username);
 516             if (sr->password && *sr->password)
 517             {
 518                 strcat(auth->u.open, "/");
 519                 strcat(auth->u.open, sr->password);
 520             }
 521             assoc->init->auth = auth;
 522         }
 523
 524 #if 1
 525         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 526         assoc->init->charneg_request = ce->u.charNeg3;
 527 #endif
 528         assoc->backend = 0;
 529         if (!(binitres = (*cb->bend_init)(assoc->init)))
 530         {
 531             assoc->state = ASSOC_DEAD;
 532             yaz_add_srw_diagnostic(assoc->encode, d, num,
 533                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 534             return 0;
 535         }
 536         assoc->backend = binitres->handle;
 537         assoc->init->auth = 0;
 538         if (binitres->errcode)
 539         {
 540             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 541             assoc->state = ASSOC_DEAD;
 542             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 543                                    binitres->errstring);
 544             return 0;
 545         }
 546         return 1;
 547     }
 548     return 1;
 549 }
 550
 551 static const char *get_esn(Z_RecordComposition *comp)
 552 {
 553     if (comp && comp->which == Z_RecordComp_complex)
 554     {
 555         if (comp->u.complex->generic
 556             && comp->u.complex->generic->elementSpec
 557             && (comp->u.complex->generic->elementSpec->which ==
 558                 Z_ElementSpec_elementSetName))
 559             return comp->u.complex->generic->elementSpec->u.elementSetName;
 560     }
 561     else if (comp && comp->which == Z_RecordComp_simple &&
 562              comp->u.simple->which == Z_ElementSetNames_generic)
 563         return comp->u.simple->u.generic;
 564     return 0;
 565 }
 566
 567 static void set_esn(Z_RecordComposition **comp_p, const char *esn, NMEM nmem)
 568 {
 569     Z_RecordComposition *comp = nmem_malloc(nmem, sizeof(*comp));
 570
 571     comp->which = Z_RecordComp_simple;
 572     comp->u.simple = nmem_malloc(nmem, sizeof(*comp->u.simple));
 573     comp->u.simple->which = Z_ElementSetNames_generic;
 574     comp->u.simple->u.generic = nmem_strdup(nmem, esn);
 575     *comp_p = comp;
 576 }
 577
 578 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 579 {
 580 #if HAVE_XML2
 581     yaz_record_conv_t rc = 0;
 582     const char *match_schema = 0;
 583     int *match_syntax = 0;
 584
 585     if (assoc->server)
 586     {
 587         int r;
 588         const char *input_schema = get_esn(rr->comp);
 589         Odr_oid *input_syntax_raw = rr->request_format_raw;
 590
 591         const char *backend_schema = 0;
 592         Odr_oid *backend_syntax = 0;
 593
 594         r = yaz_retrieval_request(assoc->server->retrieval,
 595                                   input_schema,
 596                                   input_syntax_raw,
 597                                   &match_schema,
 598                                   &match_syntax,
 599                                   &rc,
 600                                   &backend_schema,
 601                                   &backend_syntax);
 602         if (r == -1) /* error ? */
 603         {
 604             const char *details = yaz_retrieval_get_error(
 605                 assoc->server->retrieval);
 606
 607             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 608             if (details)
 609                 rr->errstring = odr_strdup(rr->stream, details);
 610             return -1;
 611         }
 612         else if (r == 1 || r == 3)
 613         {
 614             const char *details = input_schema;
 615             rr->errcode =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
 616             if (details)
 617                 rr->errstring = odr_strdup(rr->stream, details);
 618             return -1;
 619         }
 620         else if (r == 2)
 621         {
 622             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 623             if (input_syntax_raw)
 624             {
 625                 char oidbuf[OID_STR_MAX];
 626                 oid_to_dotstring(input_syntax_raw, oidbuf);
 627                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 628             }
 629             return -1;
 630         }
 631         if (backend_schema)
 632         {
 633             set_esn(&rr->comp, backend_schema, rr->stream->mem);
 634         }
 635         if (backend_syntax)
 636         {
 637             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 638
 639             rr->request_format_raw = backend_syntax;
 640
 641             if (oident_syntax)
 642                 rr->request_format = oident_syntax->value;
 643             else
 644                 rr->request_format = VAL_NONE;
 645         }
 646     }
 647     (*assoc->init->bend_fetch)(assoc->backend, rr);
 648     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 649     {   /* post conversion must take place .. */
 650         WRBUF output_record = wrbuf_alloc();
 651         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 652         if (r)
 653         {
 654             const char *details = yaz_record_conv_get_error(rc);
 655             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 656             if (details)
 657                 rr->errstring = odr_strdup(rr->stream, details);
 658         }
 659         else
 660         {
 661             rr->len = wrbuf_len(output_record);
 662             rr->record = odr_malloc(rr->stream, rr->len);
 663             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 664         }
 665         wrbuf_free(output_record, 1);
 666     }
 667     if (match_syntax)
 668     {
 669         struct oident *oi = oid_getentbyoid(match_syntax);
 670         rr->output_format = oi ? oi->value : VAL_NONE;
 671         rr->output_format_raw = match_syntax;
 672     }
 673     if (match_schema)
 674         rr->schema = odr_strdup(rr->stream, match_schema);
 675     return 0;
 676 #else
 677     (*assoc->init->bend_fetch)(assoc->backend, rr);
 678 #endif
 679 }
 680
 681 static int srw_bend_fetch(association *assoc, int pos,
 682                           Z_SRW_searchRetrieveRequest *srw_req,
 683                           Z_SRW_record *record)
 684 {
 685     bend_fetch_rr rr;
 686     ODR o = assoc->encode;
 687
 688     rr.setname = "default";
 689     rr.number = pos;
 690     rr.referenceId = 0;
 691     rr.request_format = VAL_TEXT_XML;
 692     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 693                                                    CLASS_RECSYN,
 694                                                    VAL_TEXT_XML);
 695     rr.comp = (Z_RecordComposition *)
 696             odr_malloc(assoc->decode, sizeof(*rr.comp));
 697     rr.comp->which = Z_RecordComp_complex;
 698     rr.comp->u.complex = (Z_CompSpec *)
 699             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 700     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 701         odr_malloc(assoc->encode, sizeof(bool_t));
 702     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 703     rr.comp->u.complex->num_dbSpecific = 0;
 704     rr.comp->u.complex->dbSpecific = 0;
 705     rr.comp->u.complex->num_recordSyntax = 0;
 706     rr.comp->u.complex->recordSyntax = 0;
 707
 708     rr.comp->u.complex->generic = (Z_Specification *)
 709             odr_malloc(assoc->decode, sizeof(Z_Specification));
 710
 711     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 712     rr.comp->u.complex->generic->which = Z_Schema_uri;
 713     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 714
 715     /* ESN = recordSchema if recordSchema is present */
 716     rr.comp->u.complex->generic->elementSpec = 0;
 717     if (srw_req->recordSchema)
 718     {
 719         rr.comp->u.complex->generic->elementSpec =
 720             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 721         rr.comp->u.complex->generic->elementSpec->which =
 722             Z_ElementSpec_elementSetName;
 723         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 724             srw_req->recordSchema;
 725     }
 726
 727     rr.stream = assoc->encode;
 728     rr.print = assoc->print;
 729
 730     rr.basename = 0;
 731     rr.len = 0;
 732     rr.record = 0;
 733     rr.last_in_set = 0;
 734     rr.errcode = 0;
 735     rr.errstring = 0;
 736     rr.surrogate_flag = 0;
 737     rr.schema = srw_req->recordSchema;
 738
 739     if (!assoc->init->bend_fetch)
 740         return 1;
 741
 742     retrieve_fetch(assoc, &rr);
 743
 744     if (rr.errcode && rr.surrogate_flag)
 745     {
 746         int code = yaz_diag_bib1_to_srw(rr.errcode);
 747         const char *message = yaz_diag_srw_str(code);
 748         int len = 200;
 749         if (message)
 750             len += strlen(message);
 751         if (rr.errstring)
 752             len += strlen(rr.errstring);
 753
 754         record->recordData_buf = odr_malloc(o, len);
 755
 756         sprintf(record->recordData_buf, "<diagnostic "
 757                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 758                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 759         if (rr.errstring)
 760             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 761                     " <details>%s</details>\n", rr.errstring);
 762         if (message)
 763             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 764                     " <message>%s</message>\n", message);
 765         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 766                 "</diagnostic>\n");
 767         record->recordData_len = strlen(record->recordData_buf);
 768         record->recordPosition = odr_intdup(o, pos);
 769         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 770         return 0;
 771     }
 772     else if (rr.len >= 0)
 773     {
 774         record->recordData_buf = rr.record;
 775         record->recordData_len = rr.len;
 776         record->recordPosition = odr_intdup(o, pos);
 777         if (rr.schema)
 778             record->recordSchema = odr_strdup(o, rr.schema);
 779         else
 780             record->recordSchema = 0;
 781     }
 782     return rr.errcode;
 783 }
 784
 785 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 786                    Z_Query *query_result)
 787 {
 788     /* have a CQL query and  CQL to PQF transform .. */
 789     CQL_parser cp = cql_parser_create();
 790     int r;
 791     int srw_errcode = 0;
 792     const char *add = 0;
 793     char rpn_buf[5120];
 794
 795     r = cql_parser_string(cp, cql);
 796     if (r)
 797     {
 798         /* CQL syntax error */
 799         srw_errcode = 10;
 800     }
 801     if (!r)
 802     {
 803         /* Syntax OK */
 804         r = cql_transform_buf(ct,
 805                               cql_parser_result(cp),
 806                               rpn_buf, sizeof(rpn_buf)-1);
 807         if (r)
 808             srw_errcode  = cql_transform_error(ct, &add);
 809     }
 810     if (!r)
 811     {
 812         /* Syntax & transform OK. */
 813         /* Convert PQF string to Z39.50 to RPN query struct */
 814         YAZ_PQF_Parser pp = yaz_pqf_create();
 815         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 816         if (!rpnquery)
 817         {
 818             size_t off;
 819             const char *pqf_msg;
 820             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 821             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 822                     pqf_msg, code);
 823             srw_errcode = 10;
 824         }
 825         else
 826         {
 827             query_result->which = Z_Query_type_1;
 828             query_result->u.type_1 = rpnquery;
 829         }
 830         yaz_pqf_destroy(pp);
 831     }
 832     cql_parser_destroy(cp);
 833     return srw_errcode;
 834 }
 835
 836 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 837                         Z_AttributesPlusTerm *result)
 838 {
 839     Z_Query query;
 840     Z_RPNQuery *rpn;
 841     int srw_error = cql2pqf(odr, cql, ct, &query);
 842     if (srw_error)
 843         return srw_error;
 844     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 845         return 10; /* bad query type */
 846     rpn = query.u.type_1;
 847     if (!rpn->RPNStructure)
 848         return 10; /* must be structure */
 849     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 850         return 10; /* must be simple */
 851     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 852         return 10; /* must be attributes plus term node .. */
 853     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 854            sizeof(*result));
 855     return 0;
 856 }
 857
 858 static void srw_bend_search(association *assoc, request *req,
 859                             Z_SRW_PDU *sr,
 860                             Z_SRW_searchRetrieveResponse *srw_res,
 861                             int *http_code)
 862 {
 863     int srw_error = 0;
 864     Z_External *ext;
 865     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 866
 867     *http_code = 200;
 868     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 869     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 870     if (srw_res->num_diagnostics == 0 && assoc->init)
 871     {
 872         bend_search_rr rr;
 873         rr.setname = "default";
 874         rr.replace_set = 1;
 875         rr.num_bases = 1;
 876         rr.basenames = &srw_req->database;
 877         rr.referenceId = 0;
 878         rr.srw_sortKeys = 0;
 879         rr.srw_setname = 0;
 880         rr.srw_setnameIdleTime = 0;
 881         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 882         rr.query->u.type_1 = 0;
 883
 884         if (srw_req->query_type == Z_SRW_query_type_cql)
 885         {
 886             if (assoc->server && assoc->server->cql_transform)
 887             {
 888                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 889                                           assoc->server->cql_transform,
 890                                           rr.query);
 891                 if (srw_errcode)
 892                 {
 893                     yaz_add_srw_diagnostic(assoc->encode,
 894                                            &srw_res->diagnostics,
 895                                            &srw_res->num_diagnostics,
 896                                            srw_errcode, 0);
 897                 }
 898             }
 899             else
 900             {
 901                 /* CQL query to backend. Wrap it - Z39.50 style */
 902                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 903                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 904                                                         "1.2.840.10003.16.2");
 905                 ext->indirect_reference = 0;
 906                 ext->descriptor = 0;
 907                 ext->which = Z_External_CQL;
 908                 ext->u.cql = srw_req->query.cql;
 909
 910                 rr.query->which = Z_Query_type_104;
 911                 rr.query->u.type_104 =  ext;
 912             }
 913         }
 914         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 915         {
 916             Z_RPNQuery *RPNquery;
 917             YAZ_PQF_Parser pqf_parser;
 918
 919             pqf_parser = yaz_pqf_create ();
 920
 921             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 922                                       srw_req->query.pqf);
 923             if (!RPNquery)
 924             {
 925                 const char *pqf_msg;
 926                 size_t off;
 927                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 928                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 929                         code, pqf_msg, (long) off);
 930                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 931             }
 932
 933             rr.query->which = Z_Query_type_1;
 934             rr.query->u.type_1 =  RPNquery;
 935
 936             yaz_pqf_destroy (pqf_parser);
 937         }
 938         else
 939         {
 940             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 941                                    &srw_res->num_diagnostics,
 942                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 943         }
 944         if (rr.query->u.type_1)
 945         {
 946             rr.stream = assoc->encode;
 947             rr.decode = assoc->decode;
 948             rr.print = assoc->print;
 949             rr.request = req;
 950             if ( srw_req->sort.sortKeys )
 951                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 952                                              srw_req->sort.sortKeys );
 953             rr.association = assoc;
 954             rr.fd = 0;
 955             rr.hits = 0;
 956             rr.errcode = 0;
 957             rr.errstring = 0;
 958             rr.search_info = 0;
 959             yaz_log_zquery_level(log_requestdetail,rr.query);
 960
 961             (assoc->init->bend_search)(assoc->backend, &rr);
 962             if (rr.errcode)
 963             {
 964                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 965                 {
 966                     *http_code = 404;
 967                 }
 968                 else
 969                 {
 970                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 971                     yaz_add_srw_diagnostic(assoc->encode,
 972                                            &srw_res->diagnostics,
 973                                            &srw_res->num_diagnostics,
 974                                            srw_error, rr.errstring);
 975                 }
 976             }
 977             else
 978             {
 979                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 980                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 981
 982                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 983                         start, number, rr.hits);
 984
 985                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 986                 if (rr.srw_setname)
 987                 {
 988                     srw_res->resultSetId =
 989                         odr_strdup(assoc->encode, rr.srw_setname );
 990                     srw_res->resultSetIdleTime =
 991                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 992                 }
 993                 if (number > 0)
 994                 {
 995                     int i;
 996
 997                     if (start > rr.hits)
 998                     {
 999                         yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1000                                                &srw_res->num_diagnostics,
1001                                                YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1002                     }
1003                     else
1004                     {
1005                         int ok = 1;
1006                         if (start + number > rr.hits)
1007                             number = rr.hits - start + 1;
1008
1009                         /* Call bend_present if defined */
1010                         if (assoc->init->bend_present)
1011                         {
1012                             bend_present_rr *bprr = (bend_present_rr*)
1013                                 odr_malloc (assoc->decode, sizeof(*bprr));
1014                             bprr->setname = "default";
1015                             bprr->start = start;
1016                             bprr->number = number;
1017                             bprr->format = VAL_TEXT_XML;
1018                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1019                                     sizeof(*bprr->comp));
1020                             bprr->comp->which = Z_RecordComp_simple;
1021                             bprr->comp->u.simple = (Z_ElementSetNames *)
1022                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1023                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1024                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1025                             bprr->stream = assoc->encode;
1026                             bprr->referenceId = 0;
1027                             bprr->print = assoc->print;
1028                             bprr->request = req;
1029                             bprr->association = assoc;
1030                             bprr->errcode = 0;
1031                             bprr->errstring = NULL;
1032                             (*assoc->init->bend_present)(assoc->backend, bprr);
1033
1034                             if (!bprr->request)
1035                                 return;
1036                             if (bprr->errcode)
1037                             {
1038                                 srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1039                                 yaz_add_srw_diagnostic(assoc->encode,
1040                                                        &srw_res->diagnostics,
1041                                                        &srw_res->num_diagnostics,
1042                                                        srw_error, bprr->errstring);
1043                                 ok = 0;
1044                             }
1045                         }
1046
1047                         if (ok)
1048                         {
1049                             int j = 0;
1050                             int packing = Z_SRW_recordPacking_string;
1051                             if (srw_req->recordPacking){
1052                                 if (!strcmp(srw_req->recordPacking, "xml"))
1053                                     packing = Z_SRW_recordPacking_XML;
1054                                 if (!strcmp(srw_req->recordPacking, "url"))
1055                                     packing = Z_SRW_recordPacking_URL;
1056                             }
1057                             srw_res->records = (Z_SRW_record *)
1058                                 odr_malloc(assoc->encode,
1059                                            number * sizeof(*srw_res->records));
1060
1061                             srw_res->extra_records = (Z_SRW_extra_record **)
1062                                 odr_malloc(assoc->encode,
1063                                            number*sizeof(*srw_res->extra_records));
1064
1065                             for (i = 0; i<number; i++)
1066                             {
1067                                 int errcode;
1068
1069                                 srw_res->records[j].recordPacking = packing;
1070                                 srw_res->records[j].recordData_buf = 0;
1071                                 srw_res->extra_records[j] = 0;
1072                                 yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1073                                 errcode = srw_bend_fetch(assoc, i+start, srw_req,
1074                                                          srw_res->records + j);
1075                                 if (errcode)
1076                                 {
1077                                     yaz_add_srw_diagnostic(assoc->encode,
1078                                                            &srw_res->diagnostics,
1079                                                            &srw_res->num_diagnostics,
1080                                                            yaz_diag_bib1_to_srw (errcode),
1081                                                            rr.errstring);
1082
1083                                     break;
1084                                 }
1085                                 if (srw_res->records[j].recordData_buf)
1086                                     j++;
1087                             }
1088                             srw_res->num_records = j;
1089                             if (!j)
1090                                 srw_res->records = 0;
1091                         }
1092                     }
1093                 }
1094             }
1095         }
1096     }
1097     if (log_request)
1098     {
1099         const char *querystr = "?";
1100         const char *querytype = "?";
1101         WRBUF wr = wrbuf_alloc();
1102
1103         switch (srw_req->query_type)
1104         {
1105         case Z_SRW_query_type_cql:
1106             querytype = "CQL";
1107             querystr = srw_req->query.cql;
1108             break;
1109         case Z_SRW_query_type_pqf:
1110             querytype = "PQF";
1111             querystr = srw_req->query.pqf;
1112             break;
1113         }
1114         wrbuf_printf(wr, "SRWSearch ");
1115         if (srw_res->num_diagnostics)
1116             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1117         else if (*http_code != 200)
1118             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1119         else if (srw_res->numberOfRecords)
1120         {
1121             wrbuf_printf(wr, "OK %d",
1122                          (srw_res->numberOfRecords ?
1123                           *srw_res->numberOfRecords : 0));
1124         }
1125         wrbuf_printf(wr, " %s %d+%d",
1126                      (srw_res->resultSetId ?
1127                       srw_res->resultSetId : "-"),
1128                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1129                      srw_res->num_records);
1130         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1131         wrbuf_free(wr, 1);
1132     }
1133 }
1134
1135 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1136 {
1137 #if HAVE_XML2
1138     xmlNodePtr ptr = rr->server_node_ptr;
1139     if (!ptr)
1140         return 0;
1141     for (ptr = ptr->children; ptr; ptr = ptr->next)
1142     {
1143         if (ptr->type != XML_ELEMENT_NODE)
1144             continue;
1145         if (!strcmp((const char *) ptr->name, "explain"))
1146         {
1147             int len;
1148             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1149             xmlChar *buf_out;
1150             char *content;
1151
1152             ptr = xmlCopyNode(ptr, 1);
1153
1154             xmlDocSetRootElement(doc, ptr);
1155
1156             xmlDocDumpMemory(doc, &buf_out, &len);
1157             content = (char*) odr_malloc(rr->stream, 1+len);
1158             memcpy(content, buf_out, len);
1159             content[len] = '\0';
1160
1161             xmlFree(buf_out);
1162             xmlFreeDoc(doc);
1163             rr->explain_buf = content;
1164             return 0;
1165         }
1166     }
1167 #endif
1168     return 0;
1169 }
1170
1171 static void srw_bend_explain(association *assoc, request *req,
1172                              Z_SRW_PDU *sr,
1173                              Z_SRW_explainResponse *srw_res,
1174                              int *http_code)
1175 {
1176     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1177     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1178     *http_code = 404;
1179     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1180     if (assoc->init)
1181     {
1182         bend_explain_rr rr;
1183
1184         rr.stream = assoc->encode;
1185         rr.decode = assoc->decode;
1186         rr.print = assoc->print;
1187         rr.explain_buf = 0;
1188         rr.database = srw_req->database;
1189         if (assoc->server)
1190             rr.server_node_ptr = assoc->server->server_node_ptr;
1191         else
1192             rr.server_node_ptr = 0;
1193         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1194         if (assoc->init->bend_explain)
1195             (*assoc->init->bend_explain)(assoc->backend, &rr);
1196         else
1197             srw_bend_explain_default(assoc->backend, &rr);
1198
1199         if (rr.explain_buf)
1200         {
1201             int packing = Z_SRW_recordPacking_string;
1202             if (srw_req->recordPacking)
1203             {
1204                 if (!strcmp(srw_req->recordPacking, "xml"))
1205                     packing = Z_SRW_recordPacking_XML;
1206                 else if (!strcmp(srw_req->recordPacking, "url"))
1207                     packing = Z_SRW_recordPacking_URL;
1208             }
1209             srw_res->record.recordSchema = rr.schema;
1210             srw_res->record.recordPacking = packing;
1211             srw_res->record.recordData_buf = rr.explain_buf;
1212             srw_res->record.recordData_len = strlen(rr.explain_buf);
1213             srw_res->record.recordPosition = 0;
1214             *http_code = 200;
1215         }
1216     }
1217 }
1218
1219 static void srw_bend_scan(association *assoc, request *req,
1220                           Z_SRW_PDU *sr,
1221                           Z_SRW_scanResponse *srw_res,
1222                           int *http_code)
1223 {
1224     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1225     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1226
1227     *http_code = 200;
1228     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1229     if (srw_res->num_diagnostics == 0 && assoc->init)
1230     {
1231         struct scan_entry *save_entries;
1232
1233         bend_scan_rr *bsrr = (bend_scan_rr *)
1234             odr_malloc (assoc->encode, sizeof(*bsrr));
1235         bsrr->num_bases = 1;
1236         bsrr->basenames = &srw_req->database;
1237
1238         bsrr->num_entries = srw_req->maximumTerms ?
1239             *srw_req->maximumTerms : 10;
1240         bsrr->term_position = srw_req->responsePosition ?
1241             *srw_req->responsePosition : 1;
1242
1243         bsrr->errcode = 0;
1244         bsrr->errstring = 0;
1245         bsrr->referenceId = 0;
1246         bsrr->stream = assoc->encode;
1247         bsrr->print = assoc->print;
1248         bsrr->step_size = odr_intdup(assoc->decode, 0);
1249         bsrr->entries = 0;
1250
1251         if (bsrr->num_entries > 0)
1252         {
1253             int i;
1254             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1255                                        bsrr->num_entries);
1256             for (i = 0; i<bsrr->num_entries; i++)
1257             {
1258                 bsrr->entries[i].term = 0;
1259                 bsrr->entries[i].occurrences = 0;
1260                 bsrr->entries[i].errcode = 0;
1261                 bsrr->entries[i].errstring = 0;
1262                 bsrr->entries[i].display_term = 0;
1263             }
1264         }
1265         save_entries = bsrr->entries;  /* save it so we can compare later */
1266
1267         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1268             assoc->init->bend_scan)
1269         {
1270             Odr_oid *scan_attributeSet = 0;
1271             oident *attset;
1272             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1273
1274             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1275                                       &scan_attributeSet,
1276                                       srw_req->scanClause.pqf);
1277             if (scan_attributeSet &&
1278                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1279                 (attset->oclass == CLASS_ATTSET ||
1280                  attset->oclass == CLASS_GENERAL))
1281                 bsrr->attributeset = attset->value;
1282             else
1283                 bsrr->attributeset = VAL_NONE;
1284             yaz_pqf_destroy(pqf_parser);
1285             bsrr->scanClause = 0;
1286             ((int (*)(void *, bend_scan_rr *))
1287              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1288         }
1289         else if (srw_req->query_type == Z_SRW_query_type_cql
1290                  && assoc->init->bend_scan && assoc->server
1291                  && assoc->server->cql_transform)
1292         {
1293             int srw_error;
1294             bsrr->scanClause = 0;
1295             bsrr->attributeset = VAL_NONE;
1296             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1297             srw_error = cql2pqf_scan(assoc->encode,
1298                                      srw_req->scanClause.cql,
1299                                      assoc->server->cql_transform,
1300                                      bsrr->term);
1301             if (srw_error)
1302                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1303                                        &srw_res->num_diagnostics,
1304                                        srw_error, 0);
1305             else
1306             {
1307                 ((int (*)(void *, bend_scan_rr *))
1308                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1309             }
1310         }
1311         else if (srw_req->query_type == Z_SRW_query_type_cql
1312                  && assoc->init->bend_srw_scan)
1313         {
1314             bsrr->term = 0;
1315             bsrr->attributeset = VAL_NONE;
1316             bsrr->scanClause = srw_req->scanClause.cql;
1317             ((int (*)(void *, bend_scan_rr *))
1318              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1319         }
1320         else
1321         {
1322             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1323                                    &srw_res->num_diagnostics,
1324                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1325         }
1326         if (bsrr->errcode)
1327         {
1328             int srw_error;
1329             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1330             {
1331                 *http_code = 404;
1332                 return;
1333             }
1334             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1335
1336             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1337                                    &srw_res->num_diagnostics,
1338                                    srw_error, bsrr->errstring);
1339         }
1340         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1341         {
1342             int i;
1343             srw_res->terms = (Z_SRW_scanTerm*)
1344                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1345                            bsrr->num_entries);
1346
1347             srw_res->num_terms =  bsrr->num_entries;
1348             for (i = 0; i<bsrr->num_entries; i++)
1349             {
1350                 Z_SRW_scanTerm *t = srw_res->terms + i;
1351                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1352                 t->numberOfRecords =
1353                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1354                 t->displayTerm = 0;
1355                 if (save_entries == bsrr->entries &&
1356                     bsrr->entries[i].display_term)
1357                 {
1358                     /* the entries was _not_ set by the handler. So it's
1359                        safe to test for new member display_term. It is
1360                        NULL'ed by us.
1361                     */
1362                     t->displayTerm = odr_strdup(assoc->encode,
1363                                                 bsrr->entries[i].display_term);
1364                 }
1365                 t->whereInList = 0;
1366             }
1367         }
1368     }
1369     if (log_request)
1370     {
1371         WRBUF wr = wrbuf_alloc();
1372         const char *querytype = 0;
1373         const char *querystr = 0;
1374
1375         switch(srw_req->query_type)
1376         {
1377         case Z_SRW_query_type_pqf:
1378             querytype = "PQF";
1379             querystr = srw_req->scanClause.pqf;
1380             break;
1381         case Z_SRW_query_type_cql:
1382             querytype = "CQL";
1383             querystr = srw_req->scanClause.cql;
1384             break;
1385         default:
1386             querytype = "Unknown";
1387             querystr = "";
1388         }
1389         wrbuf_printf(wr, "SRWScan %d+%d",
1390                      (srw_req->responsePosition ?
1391                       *srw_req->responsePosition : 1),
1392                      (srw_req->maximumTerms ?
1393                       *srw_req->maximumTerms : 1));
1394         if (srw_res->num_diagnostics)
1395             wrbuf_printf(wr, " ERROR %s", srw_res->diagnostics[0].uri);
1396         else
1397             wrbuf_printf(wr, " OK -");
1398         wrbuf_printf(wr, " %s: %s", querytype, querystr);
1399         yaz_log(log_request, "%s", wrbuf_buf(wr) );
1400         wrbuf_free(wr, 1);
1401     }
1402
1403 }
1404
1405 static void srw_bend_update(association *assoc, request *req,
1406                             Z_SRW_PDU *sr,
1407                             Z_SRW_updateResponse *srw_res,
1408                             int *http_code)
1409 {
1410     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1411     yaz_log(YLOG_DEBUG, "Got SRW UpdateRequest");
1412     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1413     *http_code = 404;
1414     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1415     if (assoc->init)
1416     {
1417         bend_update_rr rr;
1418
1419         rr.stream = assoc->encode;
1420         rr.print = assoc->print;
1421         rr.num_bases = 1;
1422         rr.basenames = &srw_req->database;
1423         rr.operation = srw_req->operation;
1424         rr.operation_status = "failed";
1425         rr.record_id = 0;
1426         rr.record_version = 0;
1427         rr.record_checksum = 0;
1428         rr.record_old_version = 0;
1429         rr.record_packing = "xml";
1430         rr.record_schema = 0;
1431         rr.record_data = 0;
1432         rr.request_extra_record = 0;
1433         rr.response_extra_record = 0;
1434         rr.extra_request_data = 0;
1435         rr.extra_response_data = 0;
1436         rr.errcode = 0;
1437         rr.errstring = 0;
1438
1439         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1440         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1441         if ( !strcmp( rr.operation, "delete" ) ){
1442             if ( !srw_req->recordId ){
1443                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1444                                        &srw_res->num_diagnostics,
1445                                        7, "recordId" );
1446             }
1447             else {
1448                 rr.record_id = srw_req->recordId;
1449             }
1450             if (  !srw_req->recordVersion ){
1451                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1452                                        &srw_res->num_diagnostics,
1453                                        7, "recordVersion" );
1454             }
1455             else {
1456                 rr.record_version = odr_strdup( assoc->encode,
1457                                                 srw_req->recordVersion );
1458
1459             }
1460             if ( srw_req->recordOldVersion ){
1461                 rr.record_old_version = odr_strdup(assoc->encode,
1462                                                    srw_req->recordOldVersion );
1463             }
1464             if ( srw_req->extraRequestData ){
1465                 rr.extra_request_data = odr_strdup(assoc->encode,
1466                                                    srw_req->extraRequestData );
1467             }
1468         }
1469         else if ( !strcmp( rr.operation, "replace" ) ){
1470             if ( !srw_req->recordId ){
1471                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1472                                        &srw_res->num_diagnostics,
1473                                        7, "recordId" );
1474             }
1475             else {
1476                 rr.record_id = srw_req->recordId;
1477             }
1478             if ( srw_req->record.recordSchema == 0 ){
1479                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1480                                        &srw_res->num_diagnostics,
1481                                        7, "recordSchema" );
1482             }
1483             else {
1484                 rr.record_schema = odr_strdup(assoc->encode,
1485                                               srw_req->record.recordSchema );
1486             }
1487             switch (srw_req->record.recordPacking)
1488             {
1489             case Z_SRW_recordPacking_string:
1490                 rr.record_packing = "string";
1491                 break;
1492             case Z_SRW_recordPacking_XML:
1493                 rr.record_packing = "xml";
1494                 break;
1495             case Z_SRW_recordPacking_URL:
1496                 rr.record_packing = "url";
1497                 break;
1498             }
1499             if ( srw_req->record.recordData_len ){
1500                 rr.record_data = odr_strdupn(assoc->encode,
1501                                              srw_req->record.recordData_buf,
1502                                              srw_req->record.recordData_len );
1503                 rr.request_extra_record = srw_req->extra_record;
1504             }
1505             else {
1506                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1507                                        &srw_res->num_diagnostics,
1508                                        7, "recordData" );
1509             }
1510             if (srw_req->extraRequestData)
1511                 rr.extra_request_data = odr_strdup(assoc->encode,
1512                                                    srw_req->extraRequestData );
1513         }
1514         else if ( !strcmp( rr.operation, "insert" ) )
1515         {
1516             if ( srw_req->record.recordSchema == 0 ){
1517                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1518                                        &srw_res->num_diagnostics,
1519                                        7, "recordSchema" );
1520             }
1521             else {
1522                 rr.record_schema = odr_strdup(assoc->encode,
1523                                               srw_req->record.recordSchema);
1524             }
1525             switch (srw_req->record.recordPacking)
1526             {
1527             case Z_SRW_recordPacking_string:
1528                 rr.record_packing = "string";
1529                 break;
1530             case Z_SRW_recordPacking_XML:
1531                 rr.record_packing = "xml";
1532                 break;
1533             case Z_SRW_recordPacking_URL:
1534                 rr.record_packing = "url";
1535                 break;
1536             }
1537
1538             if (srw_req->record.recordData_len)
1539             {
1540                 rr.record_data = odr_strdupn(assoc->encode,
1541                                              srw_req->record.recordData_buf,
1542                                              srw_req->record.recordData_len );
1543                 rr.request_extra_record = srw_req->extra_record;
1544             }
1545             else
1546                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1547                                        &srw_res->num_diagnostics,
1548                                        7, "recordData" );
1549             if ( srw_req->extraRequestData )
1550                 rr.extra_request_data = odr_strdup(assoc->encode,
1551                                                    srw_req->extraRequestData );
1552         }
1553         if (srw_res->num_diagnostics == 0)
1554         {
1555             if ( assoc->init->bend_srw_update)
1556                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1557             else {
1558                 yaz_log( YLOG_WARN, "Got No Update function!");
1559                 return;
1560             }
1561         }
1562         if (rr.errcode)
1563             yaz_add_srw_diagnostic(assoc->encode,
1564                                    &srw_res->diagnostics,
1565                                    &srw_res->num_diagnostics,
1566                                    rr.errcode, rr.errstring);
1567         srw_res->recordId = rr.record_id;
1568         srw_res->operationStatus = rr.operation_status;
1569         srw_res->recordVersion = rr.record_version;
1570         srw_res->recordChecksum = rr.record_checksum;
1571         srw_res->extraResponseData = rr.extra_response_data;
1572         srw_res->record.recordPosition = 0;
1573         if (srw_res->num_diagnostics == 0 && rr.record_data)
1574         {
1575             srw_res->record.recordSchema = rr.record_schema;
1576             srw_res->record.recordPacking = srw_req->record.recordPacking;
1577             srw_res->record.recordData_buf = rr.record_data;
1578             srw_res->record.recordData_len = strlen(rr.record_data);
1579             srw_res->extra_record = rr.response_extra_record;
1580
1581         }
1582         else
1583             srw_res->record.recordData_len = 0;
1584         *http_code = 200;
1585     }
1586 }
1587
1588 /* check if path is OK (1); BAD (0) */
1589 static int check_path(const char *path)
1590 {
1591     if (*path != '/')
1592         return 0;
1593     if (strstr(path, ".."))
1594         return 0;
1595     return 1;
1596 }
1597
1598 static char *read_file(const char *fname, ODR o, int *sz)
1599 {
1600     char *buf;
1601     FILE *inf = fopen(fname, "rb");
1602     if (!inf)
1603         return 0;
1604
1605     fseek(inf, 0L, SEEK_END);
1606     *sz = ftell(inf);
1607     rewind(inf);
1608     buf = odr_malloc(o, *sz);
1609     fread(buf, 1, *sz, inf);
1610     fclose(inf);
1611     return buf;
1612 }
1613
1614 static void process_http_request(association *assoc, request *req)
1615 {
1616     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1617     ODR o = assoc->encode;
1618     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1619     Z_SRW_PDU *sr = 0;
1620     Z_SOAP *soap_package = 0;
1621     Z_GDU *p = 0;
1622     char *charset = 0;
1623     Z_HTTP_Response *hres = 0;
1624     int keepalive = 1;
1625     const char *stylesheet = 0; /* for now .. set later */
1626     Z_SRW_diagnostic *diagnostic = 0;
1627     int num_diagnostic = 0;
1628     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1629
1630     if (!control_association(assoc, host, 0))
1631     {
1632         p = z_get_HTTP_Response(o, 404);
1633         r = 1;
1634     }
1635     if (r == 2 && assoc->server && assoc->server->docpath
1636         && hreq->path[0] == '/'
1637         &&
1638         /* check if path is a proper prefix of documentroot */
1639         strncmp(hreq->path+1, assoc->server->docpath,
1640                 strlen(assoc->server->docpath))
1641         == 0)
1642     {
1643         if (!check_path(hreq->path))
1644         {
1645             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1646             p = z_get_HTTP_Response(o, 404);
1647         }
1648         else
1649         {
1650             int content_size = 0;
1651             char *content_buf = read_file(hreq->path+1, o, &content_size);
1652             if (!content_buf)
1653             {
1654                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1655                 p = z_get_HTTP_Response(o, 404);
1656             }
1657             else
1658             {
1659                 const char *ctype = 0;
1660                 yaz_mime_types types = yaz_mime_types_create();
1661
1662                 yaz_mime_types_add(types, "xsl", "application/xml");
1663                 yaz_mime_types_add(types, "xml", "application/xml");
1664                 yaz_mime_types_add(types, "css", "text/css");
1665                 yaz_mime_types_add(types, "html", "text/html");
1666                 yaz_mime_types_add(types, "htm", "text/html");
1667                 yaz_mime_types_add(types, "txt", "text/plain");
1668                 yaz_mime_types_add(types, "js", "application/x-javascript");
1669
1670                 yaz_mime_types_add(types, "gif", "image/gif");
1671                 yaz_mime_types_add(types, "png", "image/png");
1672                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1673                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1674
1675                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1676                 if (!ctype)
1677                 {
1678                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1679                     p = z_get_HTTP_Response(o, 404);
1680                 }
1681                 else
1682                 {
1683                     p = z_get_HTTP_Response(o, 200);
1684                     hres = p->u.HTTP_Response;
1685                     hres->content_buf = content_buf;
1686                     hres->content_len = content_size;
1687                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1688                 }
1689                 yaz_mime_types_destroy(types);
1690             }
1691         }
1692         r = 1;
1693     }
1694
1695     if (r == 2)
1696     {
1697         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1698         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1699     }
1700     if (r == 2)  /* not taken */
1701     {
1702         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1703                            &diagnostic, &num_diagnostic);
1704         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1705     }
1706     if (r == 0)  /* decode SRW/SRU OK .. */
1707     {
1708         int http_code = 200;
1709         if (sr->which == Z_SRW_searchRetrieve_request)
1710         {
1711             Z_SRW_PDU *res =
1712                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1713
1714             stylesheet = sr->u.request->stylesheet;
1715             if (num_diagnostic)
1716             {
1717                 res->u.response->diagnostics = diagnostic;
1718                 res->u.response->num_diagnostics = num_diagnostic;
1719             }
1720             else
1721             {
1722                 srw_bend_search(assoc, req, sr, res->u.response,
1723                                 &http_code);
1724             }
1725             if (http_code == 200)
1726                 soap_package->u.generic->p = res;
1727         }
1728         else if (sr->which == Z_SRW_explain_request)
1729         {
1730             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1731             stylesheet = sr->u.explain_request->stylesheet;
1732             if (num_diagnostic)
1733             {
1734                 res->u.explain_response->diagnostics = diagnostic;
1735                 res->u.explain_response->num_diagnostics = num_diagnostic;
1736             }
1737             srw_bend_explain(assoc, req, sr,
1738                              res->u.explain_response, &http_code);
1739             if (http_code == 200)
1740                 soap_package->u.generic->p = res;
1741         }
1742         else if (sr->which == Z_SRW_scan_request)
1743         {
1744             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1745             stylesheet = sr->u.scan_request->stylesheet;
1746             if (num_diagnostic)
1747             {
1748                 res->u.scan_response->diagnostics = diagnostic;
1749                 res->u.scan_response->num_diagnostics = num_diagnostic;
1750             }
1751             srw_bend_scan(assoc, req, sr,
1752                           res->u.scan_response, &http_code);
1753             if (http_code == 200)
1754                 soap_package->u.generic->p = res;
1755         }
1756         else if (sr->which == Z_SRW_update_request)
1757         {
1758             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1759             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1760             if (num_diagnostic)
1761             {
1762                 res->u.update_response->diagnostics = diagnostic;
1763                 res->u.update_response->num_diagnostics = num_diagnostic;
1764             }
1765             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1766             srw_bend_update(assoc, req, sr,
1767                             res->u.update_response, &http_code);
1768             if (http_code == 200)
1769                 soap_package->u.generic->p = res;
1770         }
1771         else
1772         {
1773             yaz_log(log_request, "SOAP ERROR");
1774             /* FIXME - what error, what query */
1775             http_code = 500;
1776             z_soap_error(assoc->encode, soap_package,
1777                          "SOAP-ENV:Client", "Bad method", 0);
1778         }
1779         if (http_code == 200 || http_code == 500)
1780         {
1781             static Z_SOAP_Handler soap_handlers[4] = {
1782 #if HAVE_XML2
1783                 {"http://www.loc.gov/zing/srw/", 0,
1784                  (Z_SOAP_fun) yaz_srw_codec},
1785                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1786                  (Z_SOAP_fun) yaz_srw_codec},
1787                 {"http://www.loc.gov/zing/srw/update/", 0,
1788                  (Z_SOAP_fun) yaz_ucp_codec},
1789 #endif
1790                 {0, 0, 0}
1791             };
1792             char ctype[60];
1793             int ret;
1794             p = z_get_HTTP_Response(o, 200);
1795             hres = p->u.HTTP_Response;
1796
1797             if (!stylesheet && assoc->server)
1798                 stylesheet = assoc->server->stylesheet;
1799
1800             /* empty stylesheet means NO stylesheet */
1801             if (stylesheet && *stylesheet == '\0')
1802                 stylesheet = 0;
1803
1804             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1805                                        &hres->content_buf, &hres->content_len,
1806                                        soap_handlers, charset, stylesheet);
1807             hres->code = http_code;
1808
1809             strcpy(ctype, "text/xml");
1810             if (charset)
1811             {
1812                 strcat(ctype, "; charset=");
1813                 strcat(ctype, charset);
1814             }
1815             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1816         }
1817         else
1818             p = z_get_HTTP_Response(o, http_code);
1819     }
1820
1821     if (p == 0)
1822         p = z_get_HTTP_Response(o, 500);
1823     hres = p->u.HTTP_Response;
1824     if (!strcmp(hreq->version, "1.0"))
1825     {
1826         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1827         if (v && !strcmp(v, "Keep-Alive"))
1828             keepalive = 1;
1829         else
1830             keepalive = 0;
1831         hres->version = "1.0";
1832     }
1833     else
1834     {
1835         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1836         if (v && !strcmp(v, "close"))
1837             keepalive = 0;
1838         else
1839             keepalive = 1;
1840         hres->version = "1.1";
1841     }
1842     if (!keepalive)
1843     {
1844         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1845         assoc->state = ASSOC_DEAD;
1846         assoc->cs_get_mask = 0;
1847     }
1848     else
1849     {
1850         int t;
1851         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1852
1853         if (alive && isdigit(*(const unsigned char *) alive))
1854             t = atoi(alive);
1855         else
1856             t = 15;
1857         if (t < 0 || t > 3600)
1858             t = 3600;
1859         iochan_settimeout(assoc->client_chan,t);
1860         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1861     }
1862     process_gdu_response(assoc, req, p);
1863 }
1864
1865 static void process_gdu_request(association *assoc, request *req)
1866 {
1867     if (req->gdu_request->which == Z_GDU_Z3950)
1868     {
1869         char *msg = 0;
1870         req->apdu_request = req->gdu_request->u.z3950;
1871         if (process_z_request(assoc, req, &msg) < 0)
1872             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1873     }
1874     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1875         process_http_request(assoc, req);
1876     else
1877     {
1878         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1879     }
1880 }
1881
1882 /*
1883  * Initiate request processing.
1884  */
1885 static int process_z_request(association *assoc, request *req, char **msg)
1886 {
1887     int fd = -1;
1888     Z_APDU *res;
1889     int retval;
1890
1891     *msg = "Unknown Error";
1892     assert(req && req->state == REQUEST_IDLE);
1893     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1894     {
1895         *msg = "Missing InitRequest";
1896         return -1;
1897     }
1898     switch (req->apdu_request->which)
1899     {
1900     case Z_APDU_initRequest:
1901         res = process_initRequest(assoc, req); break;
1902     case Z_APDU_searchRequest:
1903         res = process_searchRequest(assoc, req, &fd); break;
1904     case Z_APDU_presentRequest:
1905         res = process_presentRequest(assoc, req, &fd); break;
1906     case Z_APDU_scanRequest:
1907         if (assoc->init->bend_scan)
1908             res = process_scanRequest(assoc, req, &fd);
1909         else
1910         {
1911             *msg = "Cannot handle Scan APDU";
1912             return -1;
1913         }
1914         break;
1915     case Z_APDU_extendedServicesRequest:
1916         if (assoc->init->bend_esrequest)
1917             res = process_ESRequest(assoc, req, &fd);
1918         else
1919         {
1920             *msg = "Cannot handle Extended Services APDU";
1921             return -1;
1922         }
1923         break;
1924     case Z_APDU_sortRequest:
1925         if (assoc->init->bend_sort)
1926             res = process_sortRequest(assoc, req, &fd);
1927         else
1928         {
1929             *msg = "Cannot handle Sort APDU";
1930             return -1;
1931         }
1932         break;
1933     case Z_APDU_close:
1934         process_close(assoc, req);
1935         return 0;
1936     case Z_APDU_deleteResultSetRequest:
1937         if (assoc->init->bend_delete)
1938             res = process_deleteRequest(assoc, req, &fd);
1939         else
1940         {
1941             *msg = "Cannot handle Delete APDU";
1942             return -1;
1943         }
1944         break;
1945     case Z_APDU_segmentRequest:
1946         if (assoc->init->bend_segment)
1947         {
1948             res = process_segmentRequest (assoc, req);
1949         }
1950         else
1951         {
1952             *msg = "Cannot handle Segment APDU";
1953             return -1;
1954         }
1955         break;
1956     case Z_APDU_triggerResourceControlRequest:
1957         return 0;
1958     default:
1959         *msg = "Bad APDU received";
1960         return -1;
1961     }
1962     if (res)
1963     {
1964         yaz_log(YLOG_DEBUG, "  result immediately available");
1965         retval = process_z_response(assoc, req, res);
1966     }
1967     else if (fd < 0)
1968     {
1969         yaz_log(YLOG_DEBUG, "  result unavailble");
1970         retval = 0;
1971     }
1972     else /* no result yet - one will be provided later */
1973     {
1974         IOCHAN chan;
1975
1976         /* Set up an I/O handler for the fd supplied by the backend */
1977
1978         yaz_log(YLOG_DEBUG, "   establishing handler for result");
1979         req->state = REQUEST_PENDING;
1980         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
1981             abort();
1982         iochan_setdata(chan, assoc);
1983         retval = 0;
1984     }
1985     return retval;
1986 }
1987
1988 /*
1989  * Handle message from the backend.
1990  */
1991 void backend_response(IOCHAN i, int event)
1992 {
1993     association *assoc = (association *)iochan_getdata(i);
1994     request *req = request_head(&assoc->incoming);
1995     Z_APDU *res;
1996     int fd;
1997
1998     yaz_log(YLOG_DEBUG, "backend_response");
1999     assert(assoc && req && req->state != REQUEST_IDLE);
2000     /* determine what it is we're waiting for */
2001     switch (req->apdu_request->which)
2002     {
2003         case Z_APDU_searchRequest:
2004             res = response_searchRequest(assoc, req, 0, &fd); break;
2005 #if 0
2006         case Z_APDU_presentRequest:
2007             res = response_presentRequest(assoc, req, 0, &fd); break;
2008         case Z_APDU_scanRequest:
2009             res = response_scanRequest(assoc, req, 0, &fd); break;
2010 #endif
2011         default:
2012             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2013             abort();
2014     }
2015     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2016     {
2017         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2018         do_close(assoc, Z_Close_systemProblem, 0);
2019         iochan_destroy(i);
2020         return;
2021     }
2022     else if (!res) /* no result yet - try again later */
2023     {
2024         yaz_log(YLOG_DEBUG, "   no result yet");
2025         iochan_setfd(i, fd); /* in case fd has changed */
2026     }
2027 }
2028
2029 /*
2030  * Encode response, and transfer the request structure to the outgoing queue.
2031  */
2032 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2033 {
2034     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2035
2036     if (assoc->print)
2037     {
2038         if (!z_GDU(assoc->print, &res, 0, 0))
2039             yaz_log(YLOG_WARN, "ODR print error: %s",
2040                 odr_errmsg(odr_geterror(assoc->print)));
2041         odr_reset(assoc->print);
2042     }
2043     if (!z_GDU(assoc->encode, &res, 0, 0))
2044     {
2045         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2046                 odr_errmsg(odr_geterror(assoc->decode)),
2047                 odr_getelement(assoc->decode));
2048         return -1;
2049     }
2050     req->response = odr_getbuf(assoc->encode, &req->len_response,
2051         &req->size_response);
2052     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2053     odr_reset(assoc->encode);
2054     req->state = REQUEST_IDLE;
2055     request_enq(&assoc->outgoing, req);
2056     /* turn the work over to the ir_session handler */
2057     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2058     assoc->cs_put_mask = EVENT_OUTPUT;
2059     /* Is there more work to be done? give that to the input handler too */
2060 #if 1
2061     if (request_head(&assoc->incoming))
2062     {
2063         yaz_log (YLOG_DEBUG, "more work to be done");
2064         iochan_setevent(assoc->client_chan, EVENT_WORK);
2065     }
2066 #endif
2067     return 0;
2068 }
2069
2070 /*
2071  * Encode response, and transfer the request structure to the outgoing queue.
2072  */
2073 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2074 {
2075     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2076     gres->which = Z_GDU_Z3950;
2077     gres->u.z3950 = res;
2078
2079     return process_gdu_response(assoc, req, gres);
2080 }
2081
2082 static char *get_vhost(Z_OtherInformation *otherInfo)
2083 {
2084     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2085 }
2086
2087 /*
2088  * Handle init request.
2089  * At the moment, we don't check the options
2090  * anywhere else in the code - we just try not to do anything that would
2091  * break a naive client. We'll toss 'em into the association block when
2092  * we need them there.
2093  */
2094 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2095 {
2096     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2097     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2098     Z_InitResponse *resp = apdu->u.initResponse;
2099     bend_initresult *binitres;
2100     char *version;
2101     char options[140];
2102     statserv_options_block *cb = 0;  /* by default no control for backend */
2103
2104     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2105         cb = statserv_getcontrol();  /* got control block for backend */
2106
2107     if (cb && assoc->backend)
2108         (*cb->bend_close)(assoc->backend);
2109
2110     yaz_log(log_requestdetail, "Got initRequest");
2111     if (req->implementationId)
2112         yaz_log(log_requestdetail, "Id:        %s",
2113                 req->implementationId);
2114     if (req->implementationName)
2115         yaz_log(log_requestdetail, "Name:      %s",
2116                 req->implementationName);
2117     if (req->implementationVersion)
2118         yaz_log(log_requestdetail, "Version:   %s",
2119                 req->implementationVersion);
2120
2121     assoc_init_reset(assoc);
2122
2123     assoc->init->auth = req->idAuthentication;
2124     assoc->init->referenceId = req->referenceId;
2125
2126     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2127     {
2128         Z_CharSetandLanguageNegotiation *negotiation =
2129             yaz_get_charneg_record (req->otherInfo);
2130         if (negotiation &&
2131             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2132             assoc->init->charneg_request = negotiation;
2133     }
2134
2135     assoc->backend = 0;
2136     if (cb)
2137     {
2138         if (req->implementationVersion)
2139             yaz_log(log_requestdetail, "Config:    %s",
2140                     cb->configname);
2141
2142         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2143
2144         /* we have a backend control block, so call that init function */
2145         if (!(binitres = (*cb->bend_init)(assoc->init)))
2146         {
2147             yaz_log(YLOG_WARN, "Bad response from backend.");
2148             return 0;
2149         }
2150         assoc->backend = binitres->handle;
2151     }
2152     else
2153     {
2154         /* no backend. return error */
2155         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2156         binitres->errstring = 0;
2157         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2158         iochan_settimeout(assoc->client_chan, 10);
2159     }
2160     if ((assoc->init->bend_sort))
2161         yaz_log (YLOG_DEBUG, "Sort handler installed");
2162     if ((assoc->init->bend_search))
2163         yaz_log (YLOG_DEBUG, "Search handler installed");
2164     if ((assoc->init->bend_present))
2165         yaz_log (YLOG_DEBUG, "Present handler installed");
2166     if ((assoc->init->bend_esrequest))
2167         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2168     if ((assoc->init->bend_delete))
2169         yaz_log (YLOG_DEBUG, "Delete handler installed");
2170     if ((assoc->init->bend_scan))
2171         yaz_log (YLOG_DEBUG, "Scan handler installed");
2172     if ((assoc->init->bend_segment))
2173         yaz_log (YLOG_DEBUG, "Segment handler installed");
2174
2175     resp->referenceId = req->referenceId;
2176     *options = '\0';
2177     /* let's tell the client what we can do */
2178     if (ODR_MASK_GET(req->options, Z_Options_search))
2179     {
2180         ODR_MASK_SET(resp->options, Z_Options_search);
2181         strcat(options, "srch");
2182     }
2183     if (ODR_MASK_GET(req->options, Z_Options_present))
2184     {
2185         ODR_MASK_SET(resp->options, Z_Options_present);
2186         strcat(options, " prst");
2187     }
2188     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2189         assoc->init->bend_delete)
2190     {
2191         ODR_MASK_SET(resp->options, Z_Options_delSet);
2192         strcat(options, " del");
2193     }
2194     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2195         assoc->init->bend_esrequest)
2196     {
2197         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2198         strcat (options, " extendedServices");
2199     }
2200     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2201     {
2202         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2203         strcat(options, " namedresults");
2204     }
2205     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2206     {
2207         ODR_MASK_SET(resp->options, Z_Options_scan);
2208         strcat(options, " scan");
2209     }
2210     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2211     {
2212         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2213         strcat(options, " concurrop");
2214     }
2215     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2216     {
2217         ODR_MASK_SET(resp->options, Z_Options_sort);
2218         strcat(options, " sort");
2219     }
2220
2221     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2222         && assoc->init->charneg_response)
2223     {
2224         Z_OtherInformation **p;
2225         Z_OtherInformationUnit *p0;
2226
2227         yaz_oi_APDU(apdu, &p);
2228
2229         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2230             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2231
2232             p0->which = Z_OtherInfo_externallyDefinedInfo;
2233             p0->information.externallyDefinedInfo =
2234                 assoc->init->charneg_response;
2235         }
2236         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2237         strcat(options, " negotiation");
2238     }
2239
2240     ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2241
2242     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2243     {
2244         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2245         assoc->version = 1; /* 1 & 2 are equivalent */
2246     }
2247     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2248     {
2249         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2250         assoc->version = 2;
2251     }
2252     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2253     {
2254         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2255         assoc->version = 3;
2256     }
2257
2258     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2259     assoc->maximumRecordSize = *req->maximumRecordSize;
2260
2261     if (cb && assoc->maximumRecordSize > cb->maxrecordsize)
2262         assoc->maximumRecordSize = cb->maxrecordsize;
2263     assoc->preferredMessageSize = *req->preferredMessageSize;
2264     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
2265         assoc->preferredMessageSize = assoc->maximumRecordSize;
2266
2267     resp->preferredMessageSize = &assoc->preferredMessageSize;
2268     resp->maximumRecordSize = &assoc->maximumRecordSize;
2269
2270     resp->implementationId = odr_prepend(assoc->encode,
2271                 assoc->init->implementation_id,
2272                 resp->implementationId);
2273
2274     resp->implementationName = odr_prepend(assoc->encode,
2275                 assoc->init->implementation_name,
2276                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2277
2278     version = odr_strdup(assoc->encode, "$Revision: 1.84 $");
2279     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2280         version[strlen(version)-2] = '\0';
2281     resp->implementationVersion = odr_prepend(assoc->encode,
2282                 assoc->init->implementation_version,
2283                 odr_prepend(assoc->encode, &version[11],
2284                             resp->implementationVersion));
2285
2286     if (binitres->errcode)
2287     {
2288         assoc->state = ASSOC_DEAD;
2289         resp->userInformationField =
2290             init_diagnostics(assoc->encode, binitres->errcode,
2291                              binitres->errstring);
2292         *resp->result = 0;
2293     }
2294     if (log_request)
2295     {
2296         if (!req->idAuthentication)
2297             yaz_log(log_request, "Auth none");
2298         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2299         {
2300             const char *open = req->idAuthentication->u.open;
2301             const char *slash = strchr(open, '/');
2302             int len;
2303             if (slash)
2304                 len = slash - open;
2305             else
2306                 len = strlen(open);
2307                 yaz_log(log_request, "Auth open %.*s", len, open);
2308         }
2309         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2310         {
2311             const char *user = req->idAuthentication->u.idPass->userId;
2312             const char *group = req->idAuthentication->u.idPass->groupId;
2313             yaz_log(log_request, "Auth idPass %s %s",
2314                     user ? user : "-", group ? group : "-");
2315         }
2316         else if (req->idAuthentication->which
2317                  == Z_IdAuthentication_anonymous)
2318         {
2319             yaz_log(log_request, "Auth anonymous");
2320         }
2321         else
2322         {
2323             yaz_log(log_request, "Auth other");
2324         }
2325     }
2326     if (log_request)
2327     {
2328         WRBUF wr = wrbuf_alloc();
2329         wrbuf_printf(wr, "Init ");
2330         if (binitres->errcode)
2331             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2332         else
2333             wrbuf_printf(wr, "OK -");
2334         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2335                      (req->implementationId ? req->implementationId :"-"),
2336                      (req->implementationName ?
2337                       req->implementationName : "-"),
2338                      (req->implementationVersion ?
2339                       req->implementationVersion : "-")
2340             );
2341         yaz_log(log_request, "%s", wrbuf_buf(wr));
2342         wrbuf_free(wr, 1);
2343     }
2344     return apdu;
2345 }
2346
2347 /*
2348  * Set the specified `errcode' and `errstring' into a UserInfo-1
2349  * external to be returned to the client in accordance with Z35.90
2350  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2351  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2352  */
2353 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2354 {
2355     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2356         addinfo ? " -- " : "", addinfo ? addinfo : "");
2357     return zget_init_diagnostics(odr, error, addinfo);
2358 }
2359
2360 /*
2361  * nonsurrogate diagnostic record.
2362  */
2363 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2364 {
2365     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2366
2367     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2368             addinfo ? " -- " : "", addinfo ? addinfo : "");
2369
2370     rec->which = Z_Records_NSD;
2371     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2372                                                            error, addinfo);
2373     return rec;
2374 }
2375
2376 /*
2377  * surrogate diagnostic.
2378  */
2379 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2380                                           const char *dbname,
2381                                           int error, const char *addinfo)
2382 {
2383     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2384             addinfo ? " -- " : "", addinfo ? addinfo : "");
2385     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2386 }
2387
2388 static Z_Records *pack_records(association *a, char *setname, int start,
2389                                int *num, Z_RecordComposition *comp,
2390                                int *next, int *pres, oid_value format,
2391                                Z_ReferenceId *referenceId,
2392                                int *oid, int *errcode)
2393 {
2394     int recno, total_length = 0, toget = *num, dumped_records = 0;
2395     Z_Records *records =
2396         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2397     Z_NamePlusRecordList *reclist =
2398         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2399     Z_NamePlusRecord **list =
2400         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2401
2402     records->which = Z_Records_DBOSD;
2403     records->u.databaseOrSurDiagnostics = reclist;
2404     reclist->num_records = 0;
2405     reclist->records = list;
2406     *pres = Z_PresentStatus_success;
2407     *num = 0;
2408     *next = 0;
2409
2410     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2411     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2412         a->maximumRecordSize);
2413     for (recno = start; reclist->num_records < toget; recno++)
2414     {
2415         bend_fetch_rr freq;
2416         Z_NamePlusRecord *thisrec;
2417         int this_length = 0;
2418         /*
2419          * we get the number of bytes allocated on the stream before any
2420          * allocation done by the backend - this should give us a reasonable
2421          * idea of the total size of the data so far.
2422          */
2423         total_length = odr_total(a->encode) - dumped_records;
2424         freq.errcode = 0;
2425         freq.errstring = 0;
2426         freq.basename = 0;
2427         freq.len = 0;
2428         freq.record = 0;
2429         freq.last_in_set = 0;
2430         freq.setname = setname;
2431         freq.surrogate_flag = 0;
2432         freq.number = recno;
2433         freq.comp = comp;
2434         freq.request_format = format;
2435         freq.request_format_raw = oid;
2436         freq.output_format = format;
2437         freq.output_format_raw = 0;
2438         freq.stream = a->encode;
2439         freq.print = a->print;
2440         freq.referenceId = referenceId;
2441         freq.schema = 0;
2442
2443         retrieve_fetch(a, &freq);
2444
2445         *next = freq.last_in_set ? 0 : recno + 1;
2446
2447         /* backend should be able to signal whether error is system-wide
2448            or only pertaining to current record */
2449         if (freq.errcode)
2450         {
2451             if (!freq.surrogate_flag)
2452             {
2453                 char s[20];
2454                 *pres = Z_PresentStatus_failure;
2455                 /* for 'present request out of range',
2456                    set addinfo to record position if not set */
2457                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2458                                 freq.errstring == 0)
2459                 {
2460                     sprintf (s, "%d", recno);
2461                     freq.errstring = s;
2462                 }
2463                 if (errcode)
2464                     *errcode = freq.errcode;
2465                 return diagrec(a, freq.errcode, freq.errstring);
2466             }
2467             reclist->records[reclist->num_records] =
2468                 surrogatediagrec(a, freq.basename, freq.errcode,
2469                                  freq.errstring);
2470             reclist->num_records++;
2471             continue;
2472         }
2473         if (freq.record == 0)  /* no error and no record ? */
2474         {
2475             *next = 0;   /* signal end-of-set and stop */
2476             break;
2477         }
2478         if (freq.len >= 0)
2479             this_length = freq.len;
2480         else
2481             this_length = odr_total(a->encode) - total_length - dumped_records;
2482         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2483             this_length, total_length, dumped_records);
2484         if (a->preferredMessageSize > 0 &&
2485                 this_length + total_length > a->preferredMessageSize)
2486         {
2487             /* record is small enough, really */
2488             if (this_length <= a->preferredMessageSize && recno > start)
2489             {
2490                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2491                 *pres = Z_PresentStatus_partial_2;
2492                 break;
2493             }
2494             /* record can only be fetched by itself */
2495             if (this_length < a->maximumRecordSize)
2496             {
2497                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2498                 if (toget > 1)
2499                 {
2500                     yaz_log(YLOG_DEBUG, "  Dropped it");
2501                     reclist->records[reclist->num_records] =
2502                          surrogatediagrec(a, freq.basename, 16, 0);
2503                     reclist->num_records++;
2504                     dumped_records += this_length;
2505                     continue;
2506                 }
2507             }
2508             else /* too big entirely */
2509             {
2510                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2511                         this_length, a->maximumRecordSize);
2512                 reclist->records[reclist->num_records] =
2513                     surrogatediagrec(a, freq.basename, 17, 0);
2514                 reclist->num_records++;
2515                 dumped_records += this_length;
2516                 continue;
2517             }
2518         }
2519
2520         if (!(thisrec = (Z_NamePlusRecord *)
2521               odr_malloc(a->encode, sizeof(*thisrec))))
2522             return 0;
2523         if (freq.basename)
2524             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2525         else
2526             thisrec->databaseName = 0;
2527         thisrec->which = Z_NamePlusRecord_databaseRecord;
2528
2529         if (freq.output_format_raw)
2530         {
2531             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2532             freq.output_format = ident->value;
2533         }
2534         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2535                                                  freq.record, freq.len);
2536         if (!thisrec->u.databaseRecord)
2537             return 0;
2538         reclist->records[reclist->num_records] = thisrec;
2539         reclist->num_records++;
2540     }
2541     *num = reclist->num_records;
2542     return records;
2543 }
2544
2545 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2546     int *fd)
2547 {
2548     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2549     bend_search_rr *bsrr =
2550         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2551
2552     yaz_log(log_requestdetail, "Got SearchRequest.");
2553     bsrr->fd = fd;
2554     bsrr->request = reqb;
2555     bsrr->association = assoc;
2556     bsrr->referenceId = req->referenceId;
2557     save_referenceId (reqb, bsrr->referenceId);
2558     bsrr->srw_sortKeys = 0;
2559     bsrr->srw_setname = 0;
2560     bsrr->srw_setnameIdleTime = 0;
2561
2562     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2563     if (req->databaseNames)
2564     {
2565         int i;
2566         for (i = 0; i < req->num_databaseNames; i++)
2567             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2568     }
2569
2570     yaz_log_zquery_level(log_requestdetail,req->query);
2571
2572     if (assoc->init->bend_search)
2573     {
2574         bsrr->setname = req->resultSetName;
2575         bsrr->replace_set = *req->replaceIndicator;
2576         bsrr->num_bases = req->num_databaseNames;
2577         bsrr->basenames = req->databaseNames;
2578         bsrr->query = req->query;
2579         bsrr->stream = assoc->encode;
2580         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2581         bsrr->decode = assoc->decode;
2582         bsrr->print = assoc->print;
2583         bsrr->hits = 0;
2584         bsrr->errcode = 0;
2585         bsrr->errstring = NULL;
2586         bsrr->search_info = NULL;
2587
2588         if (assoc->server && assoc->server->cql_transform
2589             && req->query->which == Z_Query_type_104
2590             && req->query->u.type_104->which == Z_External_CQL)
2591         {
2592             /* have a CQL query and a CQL to PQF transform .. */
2593             int srw_errcode =
2594                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2595                         assoc->server->cql_transform, bsrr->query);
2596             if (srw_errcode)
2597                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2598         }
2599         if (!bsrr->errcode)
2600             (assoc->init->bend_search)(assoc->backend, bsrr);
2601         if (!bsrr->request)  /* backend not ready with the search response */
2602             return 0;  /* should not be used any more */
2603     }
2604     else
2605     {
2606         /* FIXME - make a diagnostic for it */
2607         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2608     }
2609     return response_searchRequest(assoc, reqb, bsrr, fd);
2610 }
2611
2612 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2613
2614 /*
2615  * Prepare a searchresponse based on the backend results. We probably want
2616  * to look at making the fetching of records nonblocking as well, but
2617  * so far, we'll keep things simple.
2618  * If bsrt is null, that means we're called in response to a communications
2619  * event, and we'll have to get the response for ourselves.
2620  */
2621 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2622     bend_search_rr *bsrt, int *fd)
2623 {
2624     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2625     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2626     Z_SearchResponse *resp = (Z_SearchResponse *)
2627         odr_malloc (assoc->encode, sizeof(*resp));
2628     int *nulint = odr_intdup (assoc->encode, 0);
2629     bool_t *sr = odr_intdup(assoc->encode, 1);
2630     int *next = odr_intdup(assoc->encode, 0);
2631     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2632     int returnedrecs=0;
2633
2634     apdu->which = Z_APDU_searchResponse;
2635     apdu->u.searchResponse = resp;
2636     resp->referenceId = req->referenceId;
2637     resp->additionalSearchInfo = 0;
2638     resp->otherInfo = 0;
2639     *fd = -1;
2640     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2641     {
2642         yaz_log(YLOG_FATAL, "Bad result from backend");
2643         return 0;
2644     }
2645     else if (bsrt->errcode)
2646     {
2647         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2648         resp->resultCount = nulint;
2649         resp->numberOfRecordsReturned = nulint;
2650         resp->nextResultSetPosition = nulint;
2651         resp->searchStatus = nulint;
2652         resp->resultSetStatus = none;
2653         resp->presentStatus = 0;
2654     }
2655     else
2656     {
2657         int *toget = odr_intdup(assoc->encode, 0);
2658         int *presst = odr_intdup(assoc->encode, 0);
2659         Z_RecordComposition comp, *compp = 0;
2660
2661         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2662
2663         resp->records = 0;
2664         resp->resultCount = &bsrt->hits;
2665
2666         comp.which = Z_RecordComp_simple;
2667         /* how many records does the user agent want, then? */
2668         if (bsrt->hits <= *req->smallSetUpperBound)
2669         {
2670             *toget = bsrt->hits;
2671             if ((comp.u.simple = req->smallSetElementSetNames))
2672                 compp = &comp;
2673         }
2674         else if (bsrt->hits < *req->largeSetLowerBound)
2675         {
2676             *toget = *req->mediumSetPresentNumber;
2677             if (*toget > bsrt->hits)
2678                 *toget = bsrt->hits;
2679             if ((comp.u.simple = req->mediumSetElementSetNames))
2680                 compp = &comp;
2681         }
2682         else
2683             *toget = 0;
2684
2685         if (*toget && !resp->records)
2686         {
2687             oident *prefformat;
2688             oid_value form;
2689
2690             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2691                 form = VAL_NONE;
2692             else
2693                 form = prefformat->value;
2694
2695             /* Call bend_present if defined */
2696             if (assoc->init->bend_present)
2697             {
2698                 bend_present_rr *bprr = (bend_present_rr *)
2699                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2700                 bprr->setname = req->resultSetName;
2701                 bprr->start = 1;
2702                 bprr->number = *toget;
2703                 bprr->format = form;
2704                 bprr->comp = compp;
2705                 bprr->referenceId = req->referenceId;
2706                 bprr->stream = assoc->encode;
2707                 bprr->print = assoc->print;
2708                 bprr->request = reqb;
2709                 bprr->association = assoc;
2710                 bprr->errcode = 0;
2711                 bprr->errstring = NULL;
2712                 (*assoc->init->bend_present)(assoc->backend, bprr);
2713
2714                 if (!bprr->request)
2715                     return 0;
2716                 if (bprr->errcode)
2717                 {
2718                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2719                     *resp->presentStatus = Z_PresentStatus_failure;
2720                 }
2721             }
2722
2723             if (!resp->records)
2724                 resp->records = pack_records(assoc, req->resultSetName, 1,
2725                                              toget, compp, next, presst, form, req->referenceId,
2726                                              req->preferredRecordSyntax, NULL);
2727             if (!resp->records)
2728                 return 0;
2729             resp->numberOfRecordsReturned = toget;
2730             returnedrecs = *toget;
2731             resp->nextResultSetPosition = next;
2732             resp->searchStatus = sr;
2733             resp->resultSetStatus = 0;
2734             resp->presentStatus = presst;
2735         }
2736         else
2737         {
2738             if (*resp->resultCount)
2739                 *next = 1;
2740             resp->numberOfRecordsReturned = nulint;
2741             resp->nextResultSetPosition = next;
2742             resp->searchStatus = sr;
2743             resp->resultSetStatus = 0;
2744             resp->presentStatus = 0;
2745         }
2746     }
2747     resp->additionalSearchInfo = bsrt->search_info;
2748
2749     if (log_request)
2750     {
2751         WRBUF wr = wrbuf_alloc();
2752         if (bsrt->errcode)
2753             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2754         else
2755             wrbuf_printf(wr, "OK %d", bsrt->hits);
2756         wrbuf_printf(wr, " %s 1+%d ",
2757                      req->resultSetName, returnedrecs);
2758         yaz_query_to_wrbuf(wr, req->query);
2759
2760         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2761         wrbuf_free(wr, 1);
2762     }
2763     return apdu;
2764 }
2765
2766 /*
2767  * Maybe we got a little over-friendly when we designed bend_fetch to
2768  * get only one record at a time. Some backends can optimise multiple-record
2769  * fetches, and at any rate, there is some overhead involved in
2770  * all that selecting and hopping around. Problem is, of course, that the
2771  * frontend can't know ahead of time how many records it'll need to
2772  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2773  * is downright lousy as a bulk data transfer protocol.
2774  *
2775  * To start with, we'll do the fetching of records from the backend
2776  * in one operation: To save some trips in and out of the event-handler,
2777  * and to simplify the interface to pack_records. At any rate, asynch
2778  * operation is more fun in operations that have an unpredictable execution
2779  * speed - which is normally more true for search than for present.
2780  */
2781 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2782                                       int *fd)
2783 {
2784     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2785     oident *prefformat;
2786     oid_value form;
2787     Z_APDU *apdu;
2788     Z_PresentResponse *resp;
2789     int *next;
2790     int *num;
2791     int errcode = 0;
2792     const char *errstring = 0;
2793
2794     yaz_log(log_requestdetail, "Got PresentRequest.");
2795
2796     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2797         form = VAL_NONE;
2798     else
2799         form = prefformat->value;
2800     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2801     resp->records = 0;
2802     resp->presentStatus = odr_intdup(assoc->encode, 0);
2803     if (assoc->init->bend_present)
2804     {
2805         bend_present_rr *bprr = (bend_present_rr *)
2806             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2807         bprr->setname = req->resultSetId;
2808         bprr->start = *req->resultSetStartPoint;
2809         bprr->number = *req->numberOfRecordsRequested;
2810         bprr->format = form;
2811         bprr->comp = req->recordComposition;
2812         bprr->referenceId = req->referenceId;
2813         bprr->stream = assoc->encode;
2814         bprr->print = assoc->print;
2815         bprr->request = reqb;
2816         bprr->association = assoc;
2817         bprr->errcode = 0;
2818         bprr->errstring = NULL;
2819         (*assoc->init->bend_present)(assoc->backend, bprr);
2820
2821         if (!bprr->request)
2822             return 0; /* should not happen */
2823         if (bprr->errcode)
2824         {
2825             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2826             *resp->presentStatus = Z_PresentStatus_failure;
2827             errcode = bprr->errcode;
2828             errstring = bprr->errstring;
2829         }
2830     }
2831     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2832     next = odr_intdup(assoc->encode, 0);
2833     num = odr_intdup(assoc->encode, 0);
2834
2835     apdu->which = Z_APDU_presentResponse;
2836     apdu->u.presentResponse = resp;
2837     resp->referenceId = req->referenceId;
2838     resp->otherInfo = 0;
2839
2840     if (!resp->records)
2841     {
2842         *num = *req->numberOfRecordsRequested;
2843         resp->records =
2844             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2845                          num, req->recordComposition, next,
2846                          resp->presentStatus,
2847                          form, req->referenceId, req->preferredRecordSyntax,
2848                          &errcode);
2849     }
2850     if (log_request)
2851     {
2852         WRBUF wr = wrbuf_alloc();
2853         wrbuf_printf(wr, "Present ");
2854
2855         if (*resp->presentStatus == Z_PresentStatus_failure)
2856             wrbuf_printf(wr, "ERROR %d", errcode);
2857         else if (*resp->presentStatus == Z_PresentStatus_success)
2858             wrbuf_printf(wr, "OK -");
2859         else
2860             wrbuf_printf(wr, "Partial %d", *resp->presentStatus);
2861
2862         wrbuf_printf(wr, " %s %d+%d ",
2863                 req->resultSetId, *req->resultSetStartPoint,
2864                 *req->numberOfRecordsRequested);
2865         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2866         wrbuf_free(wr, 1);
2867     }
2868     if (!resp->records)
2869         return 0;
2870     resp->numberOfRecordsReturned = num;
2871     resp->nextResultSetPosition = next;
2872
2873     return apdu;
2874 }
2875
2876 /*
2877  * Scan was implemented rather in a hurry, and with support for only the basic
2878  * elements of the service in the backend API. Suggestions are welcome.
2879  */
2880 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2881 {
2882     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2883     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2884     Z_ScanResponse *res = (Z_ScanResponse *)
2885         odr_malloc (assoc->encode, sizeof(*res));
2886     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2887     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2888     Z_ListEntries *ents = (Z_ListEntries *)
2889         odr_malloc (assoc->encode, sizeof(*ents));
2890     Z_DiagRecs *diagrecs_p = NULL;
2891     oident *attset;
2892     bend_scan_rr *bsrr = (bend_scan_rr *)
2893         odr_malloc (assoc->encode, sizeof(*bsrr));
2894     struct scan_entry *save_entries;
2895
2896     yaz_log(log_requestdetail, "Got ScanRequest");
2897
2898     apdu->which = Z_APDU_scanResponse;
2899     apdu->u.scanResponse = res;
2900     res->referenceId = req->referenceId;
2901
2902     /* if step is absent, set it to 0 */
2903     res->stepSize = odr_intdup(assoc->encode, 0);
2904     if (req->stepSize)
2905         *res->stepSize = *req->stepSize;
2906
2907     res->scanStatus = scanStatus;
2908     res->numberOfEntriesReturned = numberOfEntriesReturned;
2909     res->positionOfTerm = 0;
2910     res->entries = ents;
2911     ents->num_entries = 0;
2912     ents->entries = NULL;
2913     ents->num_nonsurrogateDiagnostics = 0;
2914     ents->nonsurrogateDiagnostics = NULL;
2915     res->attributeSet = 0;
2916     res->otherInfo = 0;
2917
2918     if (req->databaseNames)
2919     {
2920         int i;
2921         for (i = 0; i < req->num_databaseNames; i++)
2922             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2923     }
2924     bsrr->scanClause = 0;
2925     bsrr->errcode = 0;
2926     bsrr->errstring = 0;
2927     bsrr->num_bases = req->num_databaseNames;
2928     bsrr->basenames = req->databaseNames;
2929     bsrr->num_entries = *req->numberOfTermsRequested;
2930     bsrr->term = req->termListAndStartPoint;
2931     bsrr->referenceId = req->referenceId;
2932     bsrr->stream = assoc->encode;
2933     bsrr->print = assoc->print;
2934     bsrr->step_size = res->stepSize;
2935     bsrr->entries = 0;
2936     /* For YAZ 2.0 and earlier it was the backend handler that
2937        initialized entries (member display_term did not exist)
2938        YAZ 2.0 and later sets 'entries'  and initialize all members
2939        including 'display_term'. If YAZ 2.0 or later sees that
2940        entries was modified - we assume that it is an old handler and
2941        that 'display_term' is _not_ set.
2942     */
2943     if (bsrr->num_entries > 0)
2944     {
2945         int i;
2946         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
2947                                    bsrr->num_entries);
2948         for (i = 0; i<bsrr->num_entries; i++)
2949         {
2950             bsrr->entries[i].term = 0;
2951             bsrr->entries[i].occurrences = 0;
2952             bsrr->entries[i].errcode = 0;
2953             bsrr->entries[i].errstring = 0;
2954             bsrr->entries[i].display_term = 0;
2955         }
2956     }
2957     save_entries = bsrr->entries;  /* save it so we can compare later */
2958
2959     if (req->attributeSet &&
2960         (attset = oid_getentbyoid(req->attributeSet)) &&
2961         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
2962         bsrr->attributeset = attset->value;
2963     else
2964         bsrr->attributeset = VAL_NONE;
2965     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
2966             bsrr->attributeset);
2967     bsrr->term_position = req->preferredPositionInResponse ?
2968         *req->preferredPositionInResponse : 1;
2969
2970     ((int (*)(void *, bend_scan_rr *))
2971      (*assoc->init->bend_scan))(assoc->backend, bsrr);
2972
2973     if (bsrr->errcode)
2974         diagrecs_p = zget_DiagRecs(assoc->encode,
2975                                    bsrr->errcode, bsrr->errstring);
2976     else
2977     {
2978         int i;
2979         Z_Entry **tab = (Z_Entry **)
2980             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
2981
2982         if (bsrr->status == BEND_SCAN_PARTIAL)
2983             *scanStatus = Z_Scan_partial_5;
2984         else
2985             *scanStatus = Z_Scan_success;
2986         ents->entries = tab;
2987         ents->num_entries = bsrr->num_entries;
2988         res->numberOfEntriesReturned = &ents->num_entries;
2989         res->positionOfTerm = &bsrr->term_position;
2990         for (i = 0; i < bsrr->num_entries; i++)
2991         {
2992             Z_Entry *e;
2993             Z_TermInfo *t;
2994             Odr_oct *o;
2995
2996             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
2997             if (bsrr->entries[i].occurrences >= 0)
2998             {
2999                 e->which = Z_Entry_termInfo;
3000                 e->u.termInfo = t = (Z_TermInfo *)
3001                     odr_malloc(assoc->encode, sizeof(*t));
3002                 t->suggestedAttributes = 0;
3003                 t->displayTerm = 0;
3004                 if (save_entries == bsrr->entries &&
3005                     bsrr->entries[i].display_term)
3006                 {
3007                     /* the entries was _not_ set by the handler. So it's
3008                        safe to test for new member display_term. It is
3009                        NULL'ed by us.
3010                     */
3011                     t->displayTerm = odr_strdup(assoc->encode,
3012                                                 bsrr->entries[i].display_term);
3013                 }
3014                 t->alternativeTerm = 0;
3015                 t->byAttributes = 0;
3016                 t->otherTermInfo = 0;
3017                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3018                 t->term = (Z_Term *)
3019                     odr_malloc(assoc->encode, sizeof(*t->term));
3020                 t->term->which = Z_Term_general;
3021                 t->term->u.general = o =
3022                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3023                 o->buf = (unsigned char *)
3024                     odr_malloc(assoc->encode, o->len = o->size =
3025                                strlen(bsrr->entries[i].term));
3026                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3027                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3028                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3029             }
3030             else
3031             {
3032                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3033                                                   bsrr->entries[i].errcode,
3034                                                   bsrr->entries[i].errstring);
3035                 assert (drecs->num_diagRecs == 1);
3036                 e->which = Z_Entry_surrogateDiagnostic;
3037                 assert (drecs->diagRecs[0]);
3038                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3039             }
3040         }
3041     }
3042     if (diagrecs_p)
3043     {
3044         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3045         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3046     }
3047     if (log_request)
3048     {
3049         WRBUF wr = wrbuf_alloc();
3050         if (bsrr->errcode)
3051             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3052         else if (*res->scanStatus == Z_Scan_success)
3053             wrbuf_printf(wr, "OK");
3054         else
3055             wrbuf_printf(wr, "Partial");
3056
3057         wrbuf_printf(wr, " %d+%d %d ",
3058                      (req->preferredPositionInResponse ?
3059                       *req->preferredPositionInResponse : 1),
3060                      *req->numberOfTermsRequested,
3061                      (res->stepSize ? *res->stepSize : 0));
3062         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3063                           bsrr->attributeset);
3064         yaz_log(log_request, "Scan %s", wrbuf_buf(wr) );
3065         wrbuf_free(wr, 1);
3066     }
3067     return apdu;
3068 }
3069
3070 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3071     int *fd)
3072 {
3073     int i;
3074     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3075     Z_SortResponse *res = (Z_SortResponse *)
3076         odr_malloc (assoc->encode, sizeof(*res));
3077     bend_sort_rr *bsrr = (bend_sort_rr *)
3078         odr_malloc (assoc->encode, sizeof(*bsrr));
3079
3080     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3081
3082     yaz_log(log_requestdetail, "Got SortRequest.");
3083
3084     bsrr->num_input_setnames = req->num_inputResultSetNames;
3085     for (i=0;i<req->num_inputResultSetNames;i++)
3086         yaz_log(log_requestdetail, "Input resultset: '%s'",
3087                 req->inputResultSetNames[i]);
3088     bsrr->input_setnames = req->inputResultSetNames;
3089     bsrr->referenceId = req->referenceId;
3090     bsrr->output_setname = req->sortedResultSetName;
3091     yaz_log(log_requestdetail, "Output resultset: '%s'",
3092                 req->sortedResultSetName);
3093     bsrr->sort_sequence = req->sortSequence;
3094        /*FIXME - dump those sequences too */
3095     bsrr->stream = assoc->encode;
3096     bsrr->print = assoc->print;
3097
3098     bsrr->sort_status = Z_SortResponse_failure;
3099     bsrr->errcode = 0;
3100     bsrr->errstring = 0;
3101
3102     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3103
3104     res->referenceId = bsrr->referenceId;
3105     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3106     res->resultSetStatus = 0;
3107     if (bsrr->errcode)
3108     {
3109         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3110                                        bsrr->errcode, bsrr->errstring);
3111         res->diagnostics = dr->diagRecs;
3112         res->num_diagnostics = dr->num_diagRecs;
3113     }
3114     else
3115     {
3116         res->num_diagnostics = 0;
3117         res->diagnostics = 0;
3118     }
3119     res->resultCount = 0;
3120     res->otherInfo = 0;
3121
3122     apdu->which = Z_APDU_sortResponse;
3123     apdu->u.sortResponse = res;
3124     if (log_request)
3125     {
3126         WRBUF wr = wrbuf_alloc();
3127         wrbuf_printf(wr, "Sort ");
3128         if (bsrr->errcode)
3129             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3130         else
3131             wrbuf_printf(wr,  "OK -");
3132         wrbuf_printf(wr, " (");
3133         for (i = 0; i<req->num_inputResultSetNames; i++)
3134         {
3135             if (i)
3136                 wrbuf_printf(wr, ",");
3137             wrbuf_printf(wr, req->inputResultSetNames[i]);
3138         }
3139         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3140
3141         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3142         wrbuf_free(wr, 1);
3143     }
3144     return apdu;
3145 }
3146
3147 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3148     int *fd)
3149 {
3150     int i;
3151     Z_DeleteResultSetRequest *req =
3152         reqb->apdu_request->u.deleteResultSetRequest;
3153     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3154         odr_malloc (assoc->encode, sizeof(*res));
3155     bend_delete_rr *bdrr = (bend_delete_rr *)
3156         odr_malloc (assoc->encode, sizeof(*bdrr));
3157     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3158
3159     yaz_log(log_requestdetail, "Got DeleteRequest.");
3160
3161     bdrr->num_setnames = req->num_resultSetList;
3162     bdrr->setnames = req->resultSetList;
3163     for (i = 0; i<req->num_resultSetList; i++)
3164         yaz_log(log_requestdetail, "resultset: '%s'",
3165                 req->resultSetList[i]);
3166     bdrr->stream = assoc->encode;
3167     bdrr->print = assoc->print;
3168     bdrr->function = *req->deleteFunction;
3169     bdrr->referenceId = req->referenceId;
3170     bdrr->statuses = 0;
3171     if (bdrr->num_setnames > 0)
3172     {
3173         bdrr->statuses = (int*)
3174             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3175                        bdrr->num_setnames);
3176         for (i = 0; i < bdrr->num_setnames; i++)
3177             bdrr->statuses[i] = 0;
3178     }
3179     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3180
3181     res->referenceId = req->referenceId;
3182
3183     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3184
3185     res->deleteListStatuses = 0;
3186     if (bdrr->num_setnames > 0)
3187     {
3188         int i;
3189         res->deleteListStatuses = (Z_ListStatuses *)
3190             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3191         res->deleteListStatuses->num = bdrr->num_setnames;
3192         res->deleteListStatuses->elements =
3193             (Z_ListStatus **)
3194             odr_malloc (assoc->encode,
3195                         sizeof(*res->deleteListStatuses->elements) *
3196                         bdrr->num_setnames);
3197         for (i = 0; i<bdrr->num_setnames; i++)
3198         {
3199             res->deleteListStatuses->elements[i] =
3200                 (Z_ListStatus *)
3201                 odr_malloc (assoc->encode,
3202                             sizeof(**res->deleteListStatuses->elements));
3203             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3204             res->deleteListStatuses->elements[i]->id =
3205                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3206         }
3207     }
3208     res->numberNotDeleted = 0;
3209     res->bulkStatuses = 0;
3210     res->deleteMessage = 0;
3211     res->otherInfo = 0;
3212
3213     apdu->which = Z_APDU_deleteResultSetResponse;
3214     apdu->u.deleteResultSetResponse = res;
3215     if (log_request)
3216     {
3217         WRBUF wr = wrbuf_alloc();
3218         wrbuf_printf(wr, "Delete ");
3219         if (bdrr->delete_status)
3220             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3221         else
3222             wrbuf_printf(wr, "OK -");
3223         for (i = 0; i<req->num_resultSetList; i++)
3224             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3225         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3226         wrbuf_free(wr, 1);
3227     }
3228     return apdu;
3229 }
3230
3231 static void process_close(association *assoc, request *reqb)
3232 {
3233     Z_Close *req = reqb->apdu_request->u.close;
3234     static char *reasons[] =
3235     {
3236         "finished",
3237         "shutdown",
3238         "systemProblem",
3239         "costLimit",
3240         "resources",
3241         "securityViolation",
3242         "protocolError",
3243         "lackOfActivity",
3244         "peerAbort",
3245         "unspecified"
3246     };
3247
3248     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3249         reasons[*req->closeReason], req->diagnosticInformation ?
3250         req->diagnosticInformation : "NULL");
3251     if (assoc->version < 3) /* to make do_force respond with close */
3252         assoc->version = 3;
3253     do_close_req(assoc, Z_Close_finished,
3254                  "Association terminated by client", reqb);
3255     yaz_log(log_request,"Close OK");
3256 }
3257
3258 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3259 {
3260     if (refid)
3261     {
3262         reqb->len_refid = refid->len;
3263         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3264         memcpy (reqb->refid, refid->buf, refid->len);
3265     }
3266     else
3267     {
3268         reqb->len_refid = 0;
3269         reqb->refid = NULL;
3270     }
3271 }
3272
3273 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3274 {
3275     process_z_response (a, req, res);
3276 }
3277
3278 bend_request bend_request_mk (bend_association a)
3279 {
3280     request *nreq = request_get (&a->outgoing);
3281     nreq->request_mem = nmem_create ();
3282     return nreq;
3283 }
3284
3285 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3286 {
3287     Z_ReferenceId *id;
3288     if (!req->refid)
3289         return 0;
3290     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3291     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3292     id->len = id->size = req->len_refid;
3293     memcpy (id->buf, req->refid, req->len_refid);
3294     return id;
3295 }
3296
3297 void bend_request_destroy (bend_request *req)
3298 {
3299     nmem_destroy((*req)->request_mem);
3300     request_release(*req);
3301     *req = NULL;
3302 }
3303
3304 int bend_backend_respond (bend_association a, bend_request req)
3305 {
3306     char *msg;
3307     int r;
3308     r = process_z_request (a, req, &msg);
3309     if (r < 0)
3310         yaz_log (YLOG_WARN, "%s", msg);
3311     return r;
3312 }
3313
3314 void bend_request_setdata(bend_request r, void *p)
3315 {
3316     r->clientData = p;
3317 }
3318
3319 void *bend_request_getdata(bend_request r)
3320 {
3321     return r->clientData;
3322 }
3323
3324 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3325 {
3326     bend_segment_rr req;
3327
3328     req.segment = reqb->apdu_request->u.segmentRequest;
3329     req.stream = assoc->encode;
3330     req.decode = assoc->decode;
3331     req.print = assoc->print;
3332     req.association = assoc;
3333
3334     (*assoc->init->bend_segment)(assoc->backend, &req);
3335
3336     return 0;
3337 }
3338
3339 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3340 {
3341     bend_esrequest_rr esrequest;
3342     const char *ext_name = "unknown";
3343
3344     Z_ExtendedServicesRequest *req =
3345         reqb->apdu_request->u.extendedServicesRequest;
3346     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3347
3348     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3349
3350     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3351     esrequest.stream = assoc->encode;
3352     esrequest.decode = assoc->decode;
3353     esrequest.print = assoc->print;
3354     esrequest.errcode = 0;
3355     esrequest.errstring = NULL;
3356     esrequest.request = reqb;
3357     esrequest.association = assoc;
3358     esrequest.taskPackage = 0;
3359     esrequest.referenceId = req->referenceId;
3360
3361
3362     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3363     {
3364         switch(esrequest.esr->taskSpecificParameters->which)
3365         {
3366         case Z_External_itemOrder:
3367             ext_name = "ItemOrder"; break;
3368         case Z_External_update:
3369             ext_name = "Update"; break;
3370         case Z_External_update0:
3371             ext_name = "Update0"; break;
3372         case Z_External_ESAdmin:
3373             ext_name = "Admin"; break;
3374
3375         }
3376     }
3377
3378     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3379
3380     /* If the response is being delayed, return NULL */
3381     if (esrequest.request == NULL)
3382         return(NULL);
3383
3384     resp->referenceId = req->referenceId;
3385
3386     if (esrequest.errcode == -1)
3387     {
3388         /* Backend service indicates request will be processed */
3389         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3390         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3391     }
3392     else if (esrequest.errcode == 0)
3393     {
3394         /* Backend service indicates request will be processed */
3395         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3396         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3397     }
3398     else
3399     {
3400         Z_DiagRecs *diagRecs =
3401             zget_DiagRecs(assoc->encode, esrequest.errcode,
3402                           esrequest.errstring);
3403         /* Backend indicates error, request will not be processed */
3404         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3405         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3406         resp->num_diagnostics = diagRecs->num_diagRecs;
3407         resp->diagnostics = diagRecs->diagRecs;
3408         if (log_request)
3409         {
3410             WRBUF wr = wrbuf_alloc();
3411             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3412             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3413             wrbuf_free(wr, 1);
3414         }
3415
3416     }
3417     /* Do something with the members of bend_extendedservice */
3418     if (esrequest.taskPackage)
3419         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3420                                          (const char *)  esrequest.taskPackage,
3421                                           -1);
3422     yaz_log(YLOG_DEBUG,"Send the result apdu");
3423     return apdu;
3424 }
3425
3426 /*
3427  * Local variables:
3428  * c-basic-offset: 4
3429  * indent-tabs-mode: nil
3430  * End:
3431  * vim: shiftwidth=4 tabstop=8 expandtab
3432  */
3433