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 1.50 2005-03-05 09:17:27 adam 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 <yaz/proto.h>
  64 #include <yaz/oid.h>
  65 #include <yaz/log.h>
  66 #include <yaz/logrpn.h>
  67 #include <yaz/statserv.h>
  68 #include <yaz/diagbib1.h>
  69 #include <yaz/charneg.h>
  70 #include <yaz/otherinfo.h>
  71 #include <yaz/yaz-util.h>
  72 #include <yaz/pquery.h>
  73
  74 #include <yaz/srw.h>
  75 #include <yaz/backend.h>
  76
  77 static void process_gdu_request(association *assoc, request *req);
  78 static int process_z_request(association *assoc, request *req, char **msg);
  79 void backend_response(IOCHAN i, int event);
  80 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  81 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  82 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  83 static Z_External *init_diagnostics(ODR odr, int errcode,
  84                                     const char *errstring);
  85 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  86     int *fd);
  87 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  88     bend_search_rr *bsrr, int *fd);
  89 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  90     int *fd);
  91 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  92 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  93 static void process_close(association *assoc, request *reqb);
  94 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  95 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  96     int *fd);
  97 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
  98
  99 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 100
 101 /* dynamic logging levels */
 102 static int logbits_set = 0;
 103 static int log_session = 0;
 104 static int log_request = 0; /* one-line logs for requests */
 105 static int log_requestdetail = 0;  /* more detailed stuff */
 106
 107 /** get_logbits sets global loglevel bits */
 108 static void get_logbits()
 109 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 110     if (!logbits_set)
 111     {
 112         logbits_set = 1;
 113         log_session = yaz_log_module_level("session");
 114         log_request = yaz_log_module_level("request");
 115         log_requestdetail = yaz_log_module_level("requestdetail");
 116     }
 117 }
 118
 119 static void wr_diag(WRBUF w, int error, const char *addinfo)
 120 {
 121     wrbuf_printf(w, "ERROR [%d] %s%s%s",
 122                  error, diagbib1_str(error),
 123                  addinfo ? "--" : "", addinfo ? addinfo : "");
 124 }
 125
 126
 127 /*
 128  * Create and initialize a new association-handle.
 129  *  channel  : iochannel for the current line.
 130  *  link     : communications channel.
 131  * Returns: 0 or a new association handle.
 132  */
 133 association *create_association(IOCHAN channel, COMSTACK link,
 134                                 const char *apdufile)
 135 {
 136     association *anew;
 137
 138     if (!logbits_set)
 139         get_logbits();
 140     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 141         return 0;
 142     anew->init = 0;
 143     anew->version = 0;
 144     anew->last_control = 0;
 145     anew->client_chan = channel;
 146     anew->client_link = link;
 147     anew->cs_get_mask = 0;
 148     anew->cs_put_mask = 0;
 149     anew->cs_accept_mask = 0;
 150     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 151         !(anew->encode = odr_createmem(ODR_ENCODE)))
 152         return 0;
 153     if (apdufile && *apdufile)
 154     {
 155         FILE *f;
 156
 157         if (!(anew->print = odr_createmem(ODR_PRINT)))
 158             return 0;
 159         if (*apdufile == '@')
 160         {
 161             odr_setprint(anew->print, yaz_log_file());
 162         }
 163         else if (*apdufile != '-')
 164         {
 165             char filename[256];
 166             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 167             if (!(f = fopen(filename, "w")))
 168             {
 169                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 170                 return 0;
 171             }
 172             setvbuf(f, 0, _IONBF, 0);
 173             odr_setprint(anew->print, f);
 174         }
 175     }
 176     else
 177         anew->print = 0;
 178     anew->input_buffer = 0;
 179     anew->input_buffer_len = 0;
 180     anew->backend = 0;
 181     anew->state = ASSOC_NEW;
 182     request_initq(&anew->incoming);
 183     request_initq(&anew->outgoing);
 184     anew->proto = cs_getproto(link);
 185     anew->cql_transform = 0;
 186     anew->server_node_ptr = 0;
 187     return anew;
 188 }
 189
 190 /*
 191  * Free association and release resources.
 192  */
 193 void destroy_association(association *h)
 194 {
 195     statserv_options_block *cb = statserv_getcontrol();
 196     request *req;
 197
 198     xfree(h->init);
 199     odr_destroy(h->decode);
 200     odr_destroy(h->encode);
 201     if (h->print)
 202         odr_destroy(h->print);
 203     if (h->input_buffer)
 204     xfree(h->input_buffer);
 205     if (h->backend)
 206         (*cb->bend_close)(h->backend);
 207     while ((req = request_deq(&h->incoming)))
 208         request_release(req);
 209     while ((req = request_deq(&h->outgoing)))
 210         request_release(req);
 211     request_delq(&h->incoming);
 212     request_delq(&h->outgoing);
 213     xfree(h);
 214     xmalloc_trav("session closed");
 215     if (cb && cb->one_shot)
 216     {
 217         exit (0);
 218     }
 219 }
 220
 221 static void do_close_req(association *a, int reason, char *message,
 222                          request *req)
 223 {
 224     Z_APDU apdu;
 225     Z_Close *cls = zget_Close(a->encode);
 226
 227     /* Purge request queue */
 228     while (request_deq(&a->incoming));
 229     while (request_deq(&a->outgoing));
 230     if (a->version >= 3)
 231     {
 232         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 233             reason, message ? message : "none");
 234         apdu.which = Z_APDU_close;
 235         apdu.u.close = cls;
 236         *cls->closeReason = reason;
 237         cls->diagnosticInformation = message;
 238         process_z_response(a, req, &apdu);
 239         iochan_settimeout(a->client_chan, 20);
 240     }
 241     else
 242     {
 243         request_release(req);
 244         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 245         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 246     }
 247     a->state = ASSOC_DEAD;
 248 }
 249
 250 static void do_close(association *a, int reason, char *message)
 251 {
 252     request *req = request_get(&a->outgoing);
 253     do_close_req (a, reason, message, req);
 254 }
 255
 256 /*
 257  * This is where PDUs from the client are read and the further
 258  * processing is initiated. Flow of control moves down through the
 259  * various process_* functions below, until the encoded result comes back up
 260  * to the output handler in here.
 261  *
 262  *  h     : the I/O channel that has an outstanding event.
 263  *  event : the current outstanding event.
 264  */
 265 void ir_session(IOCHAN h, int event)
 266 {
 267     int res;
 268     association *assoc = (association *)iochan_getdata(h);
 269     COMSTACK conn = assoc->client_link;
 270     request *req;
 271
 272     assert(h && conn && assoc);
 273     if (event == EVENT_TIMEOUT)
 274     {
 275         if (assoc->state != ASSOC_UP)
 276         {
 277             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 278             /* do we need to lod this at all */
 279             cs_close(conn);
 280             destroy_association(assoc);
 281             iochan_destroy(h);
 282         }
 283         else
 284         {
 285             yaz_log(log_session, "Session idle too long. Sending close.");
 286             do_close(assoc, Z_Close_lackOfActivity, 0);
 287         }
 288         return;
 289     }
 290     if (event & assoc->cs_accept_mask)
 291     {
 292         if (!cs_accept (conn))
 293         {
 294             yaz_log (YLOG_WARN, "accept failed");
 295             destroy_association(assoc);
 296             iochan_destroy(h);
 297         }
 298         iochan_clearflag (h, EVENT_OUTPUT);
 299         if (conn->io_pending)
 300         {   /* cs_accept didn't complete */
 301             assoc->cs_accept_mask =
 302                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 303                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 304
 305             iochan_setflag (h, assoc->cs_accept_mask);
 306         }
 307         else
 308         {   /* cs_accept completed. Prepare for reading (cs_get) */
 309             assoc->cs_accept_mask = 0;
 310             assoc->cs_get_mask = EVENT_INPUT;
 311             iochan_setflag (h, assoc->cs_get_mask);
 312         }
 313         return;
 314     }
 315     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 316     {
 317         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 318         {
 319             yaz_log(YLOG_DEBUG, "ir_session (input)");
 320             /* We aren't speaking to this fellow */
 321             if (assoc->state == ASSOC_DEAD)
 322             {
 323                 yaz_log(log_session, "Connection closed - end of session");
 324                 cs_close(conn);
 325                 destroy_association(assoc);
 326                 iochan_destroy(h);
 327                 return;
 328             }
 329             assoc->cs_get_mask = EVENT_INPUT;
 330             if ((res = cs_get(conn, &assoc->input_buffer,
 331                 &assoc->input_buffer_len)) <= 0)
 332             {
 333                 yaz_log(log_session, "Connection closed by client");
 334                 cs_close(conn);
 335                 destroy_association(assoc);
 336                 iochan_destroy(h);
 337                 return;
 338             }
 339             else if (res == 1) /* incomplete read - wait for more  */
 340             {
 341                 if (conn->io_pending & CS_WANT_WRITE)
 342                     assoc->cs_get_mask |= EVENT_OUTPUT;
 343                 iochan_setflag(h, assoc->cs_get_mask);
 344                 return;
 345             }
 346             if (cs_more(conn)) /* more stuff - call us again later, please */
 347                 iochan_setevent(h, EVENT_INPUT);
 348
 349             /* we got a complete PDU. Let's decode it */
 350             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 351                             assoc->input_buffer[0] & 0xff,
 352                             assoc->input_buffer[1] & 0xff,
 353                             assoc->input_buffer[2] & 0xff);
 354             req = request_get(&assoc->incoming); /* get a new request */
 355             odr_reset(assoc->decode);
 356             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 357             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 358             {
 359                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 360                         "[near byte %d] ",
 361                         odr_errmsg(odr_geterror(assoc->decode)),
 362                         odr_getelement(assoc->decode),
 363                         odr_offset(assoc->decode));
 364                 if (assoc->decode->error != OHTTP)
 365                 {
 366                     yaz_log(YLOG_WARN, "PDU dump:");
 367                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 368                     request_release(req);
 369                     do_close(assoc, Z_Close_protocolError,"Malformed package");
 370                 }
 371                 else
 372                 {
 373                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 374                     assoc->state = ASSOC_DEAD;
 375                     process_gdu_response(assoc, req, p);
 376                 }
 377                 return;
 378             }
 379             req->request_mem = odr_extract_mem(assoc->decode);
 380             if (assoc->print)
 381             {
 382                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 383                     yaz_log(YLOG_WARN, "ODR print error: %s",
 384                        odr_errmsg(odr_geterror(assoc->print)));
 385                 odr_reset(assoc->print);
 386             }
 387             request_enq(&assoc->incoming, req);
 388         }
 389
 390         /* can we do something yet? */
 391         req = request_head(&assoc->incoming);
 392         if (req->state == REQUEST_IDLE)
 393         {
 394             request_deq(&assoc->incoming);
 395             process_gdu_request(assoc, req);
 396         }
 397     }
 398     if (event & assoc->cs_put_mask)
 399     {
 400         request *req = request_head(&assoc->outgoing);
 401
 402         assoc->cs_put_mask = 0;
 403         yaz_log(YLOG_DEBUG, "ir_session (output)");
 404         req->state = REQUEST_PENDING;
 405         switch (res = cs_put(conn, req->response, req->len_response))
 406         {
 407         case -1:
 408             yaz_log(log_session, "Connection closed by client");
 409             cs_close(conn);
 410             destroy_association(assoc);
 411             iochan_destroy(h);
 412             break;
 413         case 0: /* all sent - release the request structure */
 414             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 415 #if 0
 416             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 417                     req->response);
 418 #endif
 419             nmem_destroy(req->request_mem);
 420             request_deq(&assoc->outgoing);
 421             request_release(req);
 422             if (!request_head(&assoc->outgoing))
 423             {   /* restore mask for cs_get operation ... */
 424                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 425                 iochan_setflag(h, assoc->cs_get_mask);
 426                 if (assoc->state == ASSOC_DEAD)
 427                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 428             }
 429             else
 430             {
 431                 assoc->cs_put_mask = EVENT_OUTPUT;
 432             }
 433             break;
 434         default:
 435             if (conn->io_pending & CS_WANT_WRITE)
 436                 assoc->cs_put_mask |= EVENT_OUTPUT;
 437             if (conn->io_pending & CS_WANT_READ)
 438                 assoc->cs_put_mask |= EVENT_INPUT;
 439             iochan_setflag(h, assoc->cs_put_mask);
 440         }
 441     }
 442     if (event & EVENT_EXCEPT)
 443     {
 444         yaz_log(YLOG_WARN, "ir_session (exception)");
 445         cs_close(conn);
 446         destroy_association(assoc);
 447         iochan_destroy(h);
 448     }
 449 }
 450
 451 static int process_z_request(association *assoc, request *req, char **msg);
 452
 453
 454 static void assoc_init_reset(association *assoc)
 455 {
 456     xfree (assoc->init);
 457     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 458
 459     assoc->init->stream = assoc->encode;
 460     assoc->init->print = assoc->print;
 461     assoc->init->auth = 0;
 462     assoc->init->referenceId = 0;
 463     assoc->init->implementation_version = 0;
 464     assoc->init->implementation_id = 0;
 465     assoc->init->implementation_name = 0;
 466     assoc->init->bend_sort = NULL;
 467     assoc->init->bend_search = NULL;
 468     assoc->init->bend_present = NULL;
 469     assoc->init->bend_esrequest = NULL;
 470     assoc->init->bend_delete = NULL;
 471     assoc->init->bend_scan = NULL;
 472     assoc->init->bend_segment = NULL;
 473     assoc->init->bend_fetch = NULL;
 474     assoc->init->bend_explain = NULL;
 475     assoc->init->bend_srw_scan = NULL;
 476
 477     assoc->init->charneg_request = NULL;
 478     assoc->init->charneg_response = NULL;
 479
 480     assoc->init->decode = assoc->decode;
 481     assoc->init->peer_name =
 482         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 483
 484     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 485 }
 486
 487 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num)
 488 {
 489     statserv_options_block *cb = statserv_getcontrol();
 490     if (!assoc->init)
 491     {
 492         const char *encoding = "UTF-8";
 493         Z_External *ce;
 494         bend_initresult *binitres;
 495
 496         yaz_log(YLOG_LOG, "srw_bend_init config=%s", cb->configname);
 497         assoc_init_reset(assoc);
 498
 499         assoc->maximumRecordSize = 3000000;
 500         assoc->preferredMessageSize = 3000000;
 501 #if 1
 502         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 503         assoc->init->charneg_request = ce->u.charNeg3;
 504 #endif
 505         assoc->backend = 0;
 506         if (!(binitres = (*cb->bend_init)(assoc->init)))
 507         {
 508             assoc->state = ASSOC_DEAD;
 509             yaz_add_srw_diagnostic(assoc->encode, d, num, 3, 0);
 510             return 0;
 511         }
 512         assoc->backend = binitres->handle;
 513         if (binitres->errcode)
 514         {
 515             assoc->state = ASSOC_DEAD;
 516             yaz_add_srw_diagnostic(assoc->encode, d, num, binitres->errcode,
 517                                    binitres->errstring);
 518             return 0;
 519         }
 520         return 1;
 521     }
 522     return 1;
 523 }
 524
 525 static int srw_bend_fetch(association *assoc, int pos,
 526                           Z_SRW_searchRetrieveRequest *srw_req,
 527                           Z_SRW_record *record)
 528 {
 529     bend_fetch_rr rr;
 530     ODR o = assoc->encode;
 531
 532     rr.setname = "default";
 533     rr.number = pos;
 534     rr.referenceId = 0;
 535     rr.request_format = VAL_TEXT_XML;
 536     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 537                                                    CLASS_TRANSYN,
 538                                                    VAL_TEXT_XML);
 539     rr.comp = (Z_RecordComposition *)
 540             odr_malloc(assoc->decode, sizeof(*rr.comp));
 541     rr.comp->which = Z_RecordComp_complex;
 542     rr.comp->u.complex = (Z_CompSpec *)
 543             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 544     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 545         odr_malloc(assoc->encode, sizeof(bool_t));
 546     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 547     rr.comp->u.complex->num_dbSpecific = 0;
 548     rr.comp->u.complex->dbSpecific = 0;
 549     rr.comp->u.complex->num_recordSyntax = 0;
 550     rr.comp->u.complex->recordSyntax = 0;
 551
 552     rr.comp->u.complex->generic = (Z_Specification *)
 553             odr_malloc(assoc->decode, sizeof(Z_Specification));
 554
 555     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 556     rr.comp->u.complex->generic->which = Z_Schema_uri;
 557     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 558
 559     /* ESN = recordSchema if recordSchema is present */
 560     rr.comp->u.complex->generic->elementSpec = 0;
 561     if (srw_req->recordSchema)
 562     {
 563         rr.comp->u.complex->generic->elementSpec =
 564             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 565         rr.comp->u.complex->generic->elementSpec->which =
 566             Z_ElementSpec_elementSetName;
 567         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 568             srw_req->recordSchema;
 569     }
 570
 571     rr.stream = assoc->encode;
 572     rr.print = assoc->print;
 573
 574     rr.basename = 0;
 575     rr.len = 0;
 576     rr.record = 0;
 577     rr.last_in_set = 0;
 578     rr.output_format = VAL_TEXT_XML;
 579     rr.output_format_raw = 0;
 580     rr.errcode = 0;
 581     rr.errstring = 0;
 582     rr.surrogate_flag = 0;
 583     rr.schema = srw_req->recordSchema;
 584
 585     if (!assoc->init->bend_fetch)
 586         return 1;
 587
 588     (*assoc->init->bend_fetch)(assoc->backend, &rr);
 589
 590     if (rr.errcode && rr.surrogate_flag)
 591     {
 592         int code = yaz_diag_bib1_to_srw(rr.errcode);
 593         const char *message = yaz_diag_srw_str(code);
 594         int len = 200;
 595         if (message)
 596             len += strlen(message);
 597         if (rr.errstring)
 598             len += strlen(rr.errstring);
 599
 600         record->recordData_buf = odr_malloc(o, len);
 601
 602         sprintf(record->recordData_buf, "<diagnostic "
 603                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 604                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 605         if (rr.errstring)
 606             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 607                     " <details>%s</details>\n", rr.errstring);
 608         if (message)
 609             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 610                     " <message>%s</message>\n", message);
 611         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 612                 "</diagnostic>\n");
 613         record->recordData_len = strlen(record->recordData_buf);
 614         record->recordPosition = odr_intdup(o, pos);
 615         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 616         return 0;
 617     }
 618     else if (rr.len >= 0)
 619     {
 620         record->recordData_buf = rr.record;
 621         record->recordData_len = rr.len;
 622         record->recordPosition = odr_intdup(o, pos);
 623         if (rr.schema)
 624             record->recordSchema = odr_strdup(o, rr.schema);
 625         else
 626             record->recordSchema = 0;
 627     }
 628     return rr.errcode;
 629 }
 630
 631 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 632                    Z_Query *query_result)
 633 {
 634     /* have a CQL query and  CQL to PQF transform .. */
 635     CQL_parser cp = cql_parser_create();
 636     int r;
 637     int srw_errcode = 0;
 638     const char *add = 0;
 639     char rpn_buf[512];
 640
 641     r = cql_parser_string(cp, cql);
 642     if (r)
 643     {
 644         /* CQL syntax error */
 645         srw_errcode = 10;
 646     }
 647     if (!r)
 648     {
 649         /* Syntax OK */
 650         r = cql_transform_buf(ct,
 651                               cql_parser_result(cp),
 652                               rpn_buf, sizeof(rpn_buf)-1);
 653         if (r)
 654             srw_errcode  = cql_transform_error(ct, &add);
 655     }
 656     if (!r)
 657     {
 658         /* Syntax & transform OK. */
 659         /* Convert PQF string to Z39.50 to RPN query struct */
 660         YAZ_PQF_Parser pp = yaz_pqf_create();
 661         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 662         if (!rpnquery)
 663         {
 664             size_t off;
 665             const char *pqf_msg;
 666             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 667             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 668                     pqf_msg, code);
 669             srw_errcode = 10;
 670         }
 671         else
 672         {
 673             query_result->which = Z_Query_type_1;
 674             query_result->u.type_1 = rpnquery;
 675         }
 676         yaz_pqf_destroy(pp);
 677     }
 678     cql_parser_destroy(cp);
 679     return srw_errcode;
 680 }
 681
 682 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 683                         Z_AttributesPlusTerm *result)
 684 {
 685     Z_Query query;
 686     Z_RPNQuery *rpn;
 687     int srw_error = cql2pqf(odr, cql, ct, &query);
 688     if (srw_error)
 689         return srw_error;
 690     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 691         return 10; /* bad query type */
 692     rpn = query.u.type_1;
 693     if (!rpn->RPNStructure)
 694         return 10; /* must be structure */
 695     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 696         return 10; /* must be simple */
 697     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 698         return 10; /* must be attributes plus term node .. */
 699     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 700            sizeof(*result));
 701     return 0;
 702 }
 703
 704 static void srw_bend_search(association *assoc, request *req,
 705                             Z_SRW_searchRetrieveRequest *srw_req,
 706                             Z_SRW_searchRetrieveResponse *srw_res,
 707                             int *http_code)
 708 {
 709     int srw_error = 0;
 710     Z_External *ext;
 711
 712     *http_code = 200;
 713     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 714     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics);
 715     if (srw_req->sort_type != Z_SRW_sort_type_none)
 716         yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 717                                &srw_res->num_diagnostics, 80, 0);
 718     else if (srw_res->num_diagnostics == 0 && assoc->init)
 719     {
 720         bend_search_rr rr;
 721         rr.setname = "default";
 722         rr.replace_set = 1;
 723         rr.num_bases = 1;
 724         rr.basenames = &srw_req->database;
 725         rr.referenceId = 0;
 726
 727         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 728         rr.query->u.type_1 = 0;
 729
 730         if (srw_req->query_type == Z_SRW_query_type_cql)
 731         {
 732             if (assoc->cql_transform)
 733             {
 734                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 735                                           assoc->cql_transform, rr.query);
 736                 if (srw_errcode)
 737                 {
 738                     yaz_add_srw_diagnostic(assoc->encode,
 739                                            &srw_res->diagnostics,
 740                                            &srw_res->num_diagnostics,
 741                                            srw_errcode, 0);
 742                 }
 743             }
 744             else
 745             {
 746                 /* CQL query to backend. Wrap it - Z39.50 style */
 747                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 748                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 749                                                         "1.2.840.10003.16.2");
 750                 ext->indirect_reference = 0;
 751                 ext->descriptor = 0;
 752                 ext->which = Z_External_CQL;
 753                 ext->u.cql = srw_req->query.cql;
 754
 755                 rr.query->which = Z_Query_type_104;
 756                 rr.query->u.type_104 =  ext;
 757             }
 758         }
 759         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 760         {
 761             Z_RPNQuery *RPNquery;
 762             YAZ_PQF_Parser pqf_parser;
 763
 764             pqf_parser = yaz_pqf_create ();
 765
 766             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 767                                       srw_req->query.pqf);
 768             if (!RPNquery)
 769             {
 770                 const char *pqf_msg;
 771                 size_t off;
 772                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 773                 yaz_log(log_requestdetail, "Parse error %d %s near offset %d",
 774                         code, pqf_msg, off);
 775                 srw_error = 10;
 776             }
 777
 778             rr.query->which = Z_Query_type_1;
 779             rr.query->u.type_1 =  RPNquery;
 780
 781             yaz_pqf_destroy (pqf_parser);
 782         }
 783         else
 784         {
 785             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 786                                    &srw_res->num_diagnostics, 11, 0);
 787         }
 788         if (rr.query->u.type_1)
 789         {
 790             rr.stream = assoc->encode;
 791             rr.decode = assoc->decode;
 792             rr.print = assoc->print;
 793             rr.request = req;
 794             rr.association = assoc;
 795             rr.fd = 0;
 796             rr.hits = 0;
 797             rr.errcode = 0;
 798             rr.errstring = 0;
 799             rr.search_info = 0;
 800             yaz_log_zquery_level(log_requestdetail,rr.query);
 801
 802             (assoc->init->bend_search)(assoc->backend, &rr);
 803             if (rr.errcode)
 804             {
 805                 if (rr.errcode == 109) /* database unavailable */
 806                 {
 807                     *http_code = 404;
 808                 }
 809                 else
 810                 {
 811                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 812                     yaz_add_srw_diagnostic(assoc->encode,
 813                                            &srw_res->diagnostics,
 814                                            &srw_res->num_diagnostics,
 815                                            srw_error, rr.errstring);
 816                 }
 817             }
 818             else
 819             {
 820                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 821                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 822
 823                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 824                         start, number, rr.hits);
 825
 826                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 827                 if (number > 0)
 828                 {
 829                     int i;
 830
 831                     if (start > rr.hits)
 832                     {
 833                         yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 834                                                &srw_res->num_diagnostics,
 835                                                61, 0);
 836                     }
 837                     else
 838                     {
 839                         int j = 0;
 840                         int packing = Z_SRW_recordPacking_string;
 841                         if (start + number > rr.hits)
 842                             number = rr.hits - start + 1;
 843                         if (srw_req->recordPacking &&
 844                             !strcmp(srw_req->recordPacking, "xml"))
 845                             packing = Z_SRW_recordPacking_XML;
 846                         srw_res->records = (Z_SRW_record *)
 847                             odr_malloc(assoc->encode,
 848                                        number * sizeof(*srw_res->records));
 849                         for (i = 0; i<number; i++)
 850                         {
 851                         int errcode;
 852
 853                         srw_res->records[j].recordPacking = packing;
 854                         srw_res->records[j].recordData_buf = 0;
 855                         yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
 856                         errcode = srw_bend_fetch(assoc, i+start, srw_req,
 857                                                  srw_res->records + j);
 858                         if (errcode)
 859                         {
 860                             yaz_add_srw_diagnostic(assoc->encode,
 861                                                    &srw_res->diagnostics,
 862                                                    &srw_res->num_diagnostics,
 863                                                    yaz_diag_bib1_to_srw (errcode),
 864                                                    rr.errstring);
 865
 866                             break;
 867                         }
 868                         if (srw_res->records[j].recordData_buf)
 869                             j++;
 870                         }
 871                         srw_res->num_records = j;
 872                         if (!j)
 873                             srw_res->records = 0;
 874                     }
 875                 }
 876             }
 877         }
 878     }
 879     if (log_request)
 880     {
 881         const char *querystr = "?";
 882         const char *querytype = "?";
 883         WRBUF wr = wrbuf_alloc();
 884
 885         switch (srw_req->query_type)
 886         {
 887         case Z_SRW_query_type_cql:
 888             querytype = "CQL";
 889             querystr = srw_req->query.cql;
 890             break;
 891         case Z_SRW_query_type_pqf:
 892             querytype = "PQF";
 893             querystr = srw_req->query.pqf;
 894             break;
 895         }
 896         wrbuf_printf(wr, "SRWSearch ");
 897         if (srw_res->num_diagnostics)
 898             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
 899         else if (*http_code != 200)
 900             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
 901         else if (srw_res->numberOfRecords)
 902         {
 903             wrbuf_printf(wr, "OK %d",
 904                          (srw_res->numberOfRecords ?
 905                           *srw_res->numberOfRecords : 0));
 906         }
 907         wrbuf_printf(wr, " %s %d+%d",
 908                      (srw_res->resultSetId ?
 909                       srw_res->resultSetId : "-"),
 910                      (srw_req->startRecord ? *srw_req->startRecord : 1),
 911                      srw_res->num_records);
 912         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
 913         wrbuf_free(wr, 1);
 914     }
 915 }
 916
 917 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
 918 {
 919 #if HAVE_XML2
 920     xmlNodePtr ptr = rr->server_node_ptr;
 921     if (!ptr)
 922         return 0;
 923     for (ptr = ptr->children; ptr; ptr = ptr->next)
 924     {
 925         if (ptr->type != XML_ELEMENT_NODE)
 926             continue;
 927         if (!strcmp((const char *) ptr->name, "explain"))
 928         {
 929             int len;
 930             ptr = xmlCopyNode(ptr, 1);
 931
 932             xmlDocPtr doc = xmlNewDoc((const xmlChar *) "1.0");
 933
 934             xmlDocSetRootElement(doc, ptr);
 935
 936             xmlChar *buf_out;
 937             xmlDocDumpMemory(doc, &buf_out, &len);
 938             char *content = (char*) odr_malloc(rr->stream, 1+len);
 939             memcpy(content, buf_out, len);
 940             content[len] = '\0';
 941
 942             xmlFree(buf_out);
 943             xmlFreeDoc(doc);
 944             rr->explain_buf = content;
 945             return 0;
 946         }
 947     }
 948 #endif
 949     return 0;
 950 }
 951
 952 static void srw_bend_explain(association *assoc, request *req,
 953                              Z_SRW_explainRequest *srw_req,
 954                              Z_SRW_explainResponse *srw_res,
 955                              int *http_code)
 956 {
 957     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
 958     *http_code = 404;
 959     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics);
 960     if (assoc->init)
 961     {
 962         bend_explain_rr rr;
 963
 964         rr.stream = assoc->encode;
 965         rr.decode = assoc->decode;
 966         rr.print = assoc->print;
 967         rr.explain_buf = 0;
 968         rr.database = srw_req->database;
 969         rr.server_node_ptr = assoc->server_node_ptr;
 970         rr.schema = "http://explain.z3950.org/dtd/2.0/";
 971         if (assoc->init->bend_explain)
 972             (*assoc->init->bend_explain)(assoc->backend, &rr);
 973         else
 974             srw_bend_explain_default(assoc->backend, &rr);
 975
 976         if (rr.explain_buf)
 977         {
 978             int packing = Z_SRW_recordPacking_string;
 979             if (srw_req->recordPacking &&
 980                 !strcmp(srw_req->recordPacking, "xml"))
 981                 packing = Z_SRW_recordPacking_XML;
 982             srw_res->record.recordSchema = rr.schema;
 983             srw_res->record.recordPacking = packing;
 984             srw_res->record.recordData_buf = rr.explain_buf;
 985             srw_res->record.recordData_len = strlen(rr.explain_buf);
 986             srw_res->record.recordPosition = 0;
 987             *http_code = 200;
 988         }
 989     }
 990 }
 991
 992 static void srw_bend_scan(association *assoc, request *req,
 993                           Z_SRW_scanRequest *srw_req,
 994                           Z_SRW_scanResponse *srw_res,
 995                           int *http_code)
 996 {
 997     yaz_log(log_requestdetail, "Got SRW ScanRequest");
 998
 999     *http_code = 200;
1000     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics);
1001     if (srw_res->num_diagnostics == 0 && assoc->init)
1002     {
1003         struct scan_entry *save_entries;
1004
1005         bend_scan_rr *bsrr = (bend_scan_rr *)
1006             odr_malloc (assoc->encode, sizeof(*bsrr));
1007         bsrr->num_bases = 1;
1008         bsrr->basenames = &srw_req->database;
1009
1010         bsrr->num_entries = srw_req->maximumTerms ?
1011             *srw_req->maximumTerms : 10;
1012         bsrr->term_position = srw_req->responsePosition ?
1013             *srw_req->responsePosition : 1;
1014
1015         bsrr->errcode = 0;
1016         bsrr->errstring = 0;
1017         bsrr->referenceId = 0;
1018         bsrr->stream = assoc->encode;
1019         bsrr->print = assoc->print;
1020         bsrr->step_size = odr_intdup(assoc->decode, 0);
1021         bsrr->entries = 0;
1022
1023         if (bsrr->num_entries > 0)
1024         {
1025             int i;
1026             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1027                                        bsrr->num_entries);
1028             for (i = 0; i<bsrr->num_entries; i++)
1029             {
1030                 bsrr->entries[i].term = 0;
1031                 bsrr->entries[i].occurrences = 0;
1032                 bsrr->entries[i].errcode = 0;
1033                 bsrr->entries[i].errstring = 0;
1034                 bsrr->entries[i].display_term = 0;
1035             }
1036         }
1037         save_entries = bsrr->entries;  /* save it so we can compare later */
1038
1039         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1040             assoc->init->bend_scan)
1041         {
1042             Odr_oid *scan_attributeSet = 0;
1043             oident *attset;
1044             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1045
1046             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1047                                       &scan_attributeSet,
1048                                       srw_req->scanClause.pqf);
1049             if (scan_attributeSet &&
1050                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1051                 (attset->oclass == CLASS_ATTSET ||
1052                  attset->oclass == CLASS_GENERAL))
1053                 bsrr->attributeset = attset->value;
1054             else
1055                 bsrr->attributeset = VAL_NONE;
1056             yaz_pqf_destroy(pqf_parser);
1057             bsrr->scanClause = 0;
1058             ((int (*)(void *, bend_scan_rr *))
1059              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1060         }
1061         else if (srw_req->query_type == Z_SRW_query_type_cql
1062                  && assoc->init->bend_srw_scan)
1063         {
1064             if (assoc->cql_transform)
1065             {
1066                 bsrr->scanClause = 0;
1067                 bsrr->attributeset = VAL_NONE;
1068                 bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1069                 int srw_error = cql2pqf_scan(assoc->encode,
1070                                              srw_req->scanClause.cql,
1071                                              assoc->cql_transform,
1072                                              bsrr->term);
1073                 if (srw_error)
1074                     yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1075                                            &srw_res->num_diagnostics,
1076                                            srw_error, 0);
1077                 else
1078                 {
1079                     ((int (*)(void *, bend_scan_rr *))
1080                      (*assoc->init->bend_scan))(assoc->backend, bsrr);
1081                 }
1082             }
1083             else
1084             {
1085                 bsrr->term = 0;
1086                 bsrr->attributeset = VAL_NONE;
1087                 bsrr->scanClause = srw_req->scanClause.cql;
1088                 ((int (*)(void *, bend_scan_rr *))
1089                  (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1090             }
1091         }
1092         else
1093         {
1094             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1095                                    &srw_res->num_diagnostics, 4, "scan");
1096         }
1097         if (bsrr->errcode)
1098         {
1099             int srw_error;
1100             if (bsrr->errcode == 109) /* database unavailable */
1101             {
1102                 *http_code = 404;
1103                 return;
1104             }
1105             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1106
1107             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1108                                    &srw_res->num_diagnostics,
1109                                    srw_error, bsrr->errstring);
1110         }
1111         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1112         {
1113             int i;
1114             srw_res->terms = (Z_SRW_scanTerm*)
1115                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1116                            bsrr->num_entries);
1117
1118             srw_res->num_terms =  bsrr->num_entries;
1119             for (i = 0; i<bsrr->num_entries; i++)
1120             {
1121                 Z_SRW_scanTerm *t = srw_res->terms + i;
1122                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1123                 t->numberOfRecords =
1124                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1125                 t->displayTerm = 0;
1126                 if (save_entries == bsrr->entries &&
1127                     bsrr->entries[i].display_term)
1128                 {
1129                     /* the entries was _not_ set by the handler. So it's
1130                        safe to test for new member display_term. It is
1131                        NULL'ed by us.
1132                     */
1133                     t->displayTerm = odr_strdup(assoc->encode,
1134                                                 bsrr->entries[i].display_term);
1135                 }
1136                 t->whereInList = 0;
1137             }
1138         }
1139     }
1140     if (log_request)
1141     {
1142         WRBUF wr = wrbuf_alloc();
1143         const char *querytype = 0;
1144         const char *querystr = 0;
1145
1146         switch(srw_req->query_type)
1147         {
1148         case Z_SRW_query_type_pqf:
1149             querytype = "PQF";
1150             querystr = srw_req->scanClause.pqf;
1151             break;
1152         case Z_SRW_query_type_cql:
1153             querytype = "CQL";
1154             querystr = srw_req->scanClause.cql;
1155             break;
1156         default:
1157             querytype = "Unknown";
1158             querystr = "";
1159         }
1160         wrbuf_printf(wr, "SRWScan %d+%d",
1161                      (srw_req->responsePosition ?
1162                       *srw_req->responsePosition : 1),
1163                      (srw_req->maximumTerms ?
1164                       *srw_req->maximumTerms : 1));
1165         if (srw_res->num_diagnostics)
1166             wrbuf_printf(wr, " ERROR %s", srw_res->diagnostics[0].uri);
1167         else
1168             wrbuf_printf(wr, " OK -");
1169         wrbuf_printf(wr, " %s: %s", querytype, querystr);
1170         yaz_log(log_request, "%s", wrbuf_buf(wr) );
1171         wrbuf_free(wr, 1);
1172     }
1173
1174 }
1175
1176
1177 static void process_http_request(association *assoc, request *req)
1178 {
1179     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1180     ODR o = assoc->encode;
1181     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1182     Z_SRW_PDU *sr = 0;
1183     Z_SOAP *soap_package = 0;
1184     Z_GDU *p = 0;
1185     char *charset = 0;
1186     Z_HTTP_Response *hres = 0;
1187     int keepalive = 1;
1188     char *stylesheet = 0;
1189     Z_SRW_diagnostic *diagnostic = 0;
1190     int num_diagnostic = 0;
1191     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1192
1193     if (!control_association(assoc, host, 0))
1194     {
1195         p = z_get_HTTP_Response(o, 404);
1196         r = 1;
1197     }
1198     if (r == 2 && !strcmp(hreq->path, "/test"))
1199     {
1200         p = z_get_HTTP_Response(o, 200);
1201         hres = p->u.HTTP_Response;
1202         hres->content_buf = "1234567890\n";
1203         hres->content_len = strlen(hres->content_buf);
1204         r = 1;
1205     }
1206     if (r == 2)
1207     {
1208         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1209         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1210     }
1211     if (r == 2)  /* not taken */
1212     {
1213         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1214                            &diagnostic, &num_diagnostic);
1215         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1216     }
1217     if (r == 0)  /* decode SRW/SRU OK .. */
1218     {
1219         int http_code = 200;
1220         if (sr->which == Z_SRW_searchRetrieve_request)
1221         {
1222             Z_SRW_PDU *res =
1223                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1224
1225             stylesheet = sr->u.request->stylesheet;
1226             if (num_diagnostic)
1227             {
1228                 res->u.response->diagnostics = diagnostic;
1229                 res->u.response->num_diagnostics = num_diagnostic;
1230             }
1231             else
1232             {
1233                 srw_bend_search(assoc, req, sr->u.request, res->u.response,
1234                                 &http_code);
1235             }
1236             if (http_code == 200)
1237                 soap_package->u.generic->p = res;
1238         }
1239         else if (sr->which == Z_SRW_explain_request)
1240         {
1241             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1242             stylesheet = sr->u.explain_request->stylesheet;
1243             if (num_diagnostic)
1244             {
1245                 res->u.explain_response->diagnostics = diagnostic;
1246                 res->u.explain_response->num_diagnostics = num_diagnostic;
1247             }
1248             srw_bend_explain(assoc, req, sr->u.explain_request,
1249                              res->u.explain_response, &http_code);
1250             if (http_code == 200)
1251                 soap_package->u.generic->p = res;
1252         }
1253         else if (sr->which == Z_SRW_scan_request)
1254         {
1255             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1256             stylesheet = sr->u.scan_request->stylesheet;
1257             if (num_diagnostic)
1258             {
1259                 res->u.scan_response->diagnostics = diagnostic;
1260                 res->u.scan_response->num_diagnostics = num_diagnostic;
1261             }
1262             srw_bend_scan(assoc, req, sr->u.scan_request,
1263                               res->u.scan_response, &http_code);
1264             if (http_code == 200)
1265                 soap_package->u.generic->p = res;
1266         }
1267         else
1268         {
1269             yaz_log(log_request, "SOAP ERROR");
1270                /* FIXME - what error, what query */
1271             http_code = 500;
1272             z_soap_error(assoc->encode, soap_package,
1273                          "SOAP-ENV:Client", "Bad method", 0);
1274         }
1275         if (http_code == 200 || http_code == 500)
1276         {
1277             static Z_SOAP_Handler soap_handlers[3] = {
1278 #if HAVE_XML2
1279                 {"http://www.loc.gov/zing/srw/", 0,
1280                  (Z_SOAP_fun) yaz_srw_codec},
1281                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1282                  (Z_SOAP_fun) yaz_srw_codec},
1283 #endif
1284                 {0, 0, 0}
1285             };
1286             char ctype[60];
1287             int ret;
1288             p = z_get_HTTP_Response(o, 200);
1289             hres = p->u.HTTP_Response;
1290             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1291                                        &hres->content_buf, &hres->content_len,
1292                                        soap_handlers, charset, stylesheet);
1293             hres->code = http_code;
1294
1295             strcpy(ctype, "text/xml");
1296             if (charset)
1297             {
1298                 strcat(ctype, "; charset=");
1299                 strcat(ctype, charset);
1300             }
1301             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1302         }
1303         else
1304             p = z_get_HTTP_Response(o, http_code);
1305     }
1306
1307     if (p == 0)
1308         p = z_get_HTTP_Response(o, 500);
1309     hres = p->u.HTTP_Response;
1310     if (!strcmp(hreq->version, "1.0"))
1311     {
1312         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1313         if (v && !strcmp(v, "Keep-Alive"))
1314             keepalive = 1;
1315         else
1316             keepalive = 0;
1317         hres->version = "1.0";
1318     }
1319     else
1320     {
1321         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1322         if (v && !strcmp(v, "close"))
1323             keepalive = 0;
1324         else
1325             keepalive = 1;
1326         hres->version = "1.1";
1327     }
1328     if (!keepalive)
1329     {
1330         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1331         assoc->state = ASSOC_DEAD;
1332         assoc->cs_get_mask = 0;
1333     }
1334     else
1335     {
1336         int t;
1337         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1338
1339         if (alive && isdigit(*(const unsigned char *) alive))
1340             t = atoi(alive);
1341         else
1342             t = 15;
1343         if (t < 0 || t > 3600)
1344             t = 3600;
1345         iochan_settimeout(assoc->client_chan,t);
1346         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1347     }
1348     process_gdu_response(assoc, req, p);
1349 }
1350
1351 static void process_gdu_request(association *assoc, request *req)
1352 {
1353     if (req->gdu_request->which == Z_GDU_Z3950)
1354     {
1355         char *msg = 0;
1356         req->apdu_request = req->gdu_request->u.z3950;
1357         if (process_z_request(assoc, req, &msg) < 0)
1358             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1359     }
1360     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1361         process_http_request(assoc, req);
1362     else
1363     {
1364         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1365     }
1366 }
1367
1368 /*
1369  * Initiate request processing.
1370  */
1371 static int process_z_request(association *assoc, request *req, char **msg)
1372 {
1373     int fd = -1;
1374     Z_APDU *res;
1375     int retval;
1376
1377     *msg = "Unknown Error";
1378     assert(req && req->state == REQUEST_IDLE);
1379     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1380     {
1381         *msg = "Missing InitRequest";
1382         return -1;
1383     }
1384     switch (req->apdu_request->which)
1385     {
1386     case Z_APDU_initRequest:
1387         res = process_initRequest(assoc, req); break;
1388     case Z_APDU_searchRequest:
1389         res = process_searchRequest(assoc, req, &fd); break;
1390     case Z_APDU_presentRequest:
1391         res = process_presentRequest(assoc, req, &fd); break;
1392     case Z_APDU_scanRequest:
1393         if (assoc->init->bend_scan)
1394             res = process_scanRequest(assoc, req, &fd);
1395         else
1396         {
1397             *msg = "Cannot handle Scan APDU";
1398             return -1;
1399         }
1400         break;
1401     case Z_APDU_extendedServicesRequest:
1402         if (assoc->init->bend_esrequest)
1403             res = process_ESRequest(assoc, req, &fd);
1404         else
1405         {
1406             *msg = "Cannot handle Extended Services APDU";
1407             return -1;
1408         }
1409         break;
1410     case Z_APDU_sortRequest:
1411         if (assoc->init->bend_sort)
1412             res = process_sortRequest(assoc, req, &fd);
1413         else
1414         {
1415             *msg = "Cannot handle Sort APDU";
1416             return -1;
1417         }
1418         break;
1419     case Z_APDU_close:
1420         process_close(assoc, req);
1421         return 0;
1422     case Z_APDU_deleteResultSetRequest:
1423         if (assoc->init->bend_delete)
1424             res = process_deleteRequest(assoc, req, &fd);
1425         else
1426         {
1427             *msg = "Cannot handle Delete APDU";
1428             return -1;
1429         }
1430         break;
1431     case Z_APDU_segmentRequest:
1432         if (assoc->init->bend_segment)
1433         {
1434             res = process_segmentRequest (assoc, req);
1435         }
1436         else
1437         {
1438             *msg = "Cannot handle Segment APDU";
1439             return -1;
1440         }
1441         break;
1442     case Z_APDU_triggerResourceControlRequest:
1443         return 0;
1444     default:
1445         *msg = "Bad APDU received";
1446         return -1;
1447     }
1448     if (res)
1449     {
1450         yaz_log(YLOG_DEBUG, "  result immediately available");
1451         retval = process_z_response(assoc, req, res);
1452     }
1453     else if (fd < 0)
1454     {
1455         yaz_log(YLOG_DEBUG, "  result unavailble");
1456         retval = 0;
1457     }
1458     else /* no result yet - one will be provided later */
1459     {
1460         IOCHAN chan;
1461
1462         /* Set up an I/O handler for the fd supplied by the backend */
1463
1464         yaz_log(YLOG_DEBUG, "   establishing handler for result");
1465         req->state = REQUEST_PENDING;
1466         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
1467             abort();
1468         iochan_setdata(chan, assoc);
1469         retval = 0;
1470     }
1471     return retval;
1472 }
1473
1474 /*
1475  * Handle message from the backend.
1476  */
1477 void backend_response(IOCHAN i, int event)
1478 {
1479     association *assoc = (association *)iochan_getdata(i);
1480     request *req = request_head(&assoc->incoming);
1481     Z_APDU *res;
1482     int fd;
1483
1484     yaz_log(YLOG_DEBUG, "backend_response");
1485     assert(assoc && req && req->state != REQUEST_IDLE);
1486     /* determine what it is we're waiting for */
1487     switch (req->apdu_request->which)
1488     {
1489         case Z_APDU_searchRequest:
1490             res = response_searchRequest(assoc, req, 0, &fd); break;
1491 #if 0
1492         case Z_APDU_presentRequest:
1493             res = response_presentRequest(assoc, req, 0, &fd); break;
1494         case Z_APDU_scanRequest:
1495             res = response_scanRequest(assoc, req, 0, &fd); break;
1496 #endif
1497         default:
1498             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
1499             abort();
1500     }
1501     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
1502     {
1503         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
1504         do_close(assoc, Z_Close_systemProblem, 0);
1505         iochan_destroy(i);
1506         return;
1507     }
1508     else if (!res) /* no result yet - try again later */
1509     {
1510         yaz_log(YLOG_DEBUG, "   no result yet");
1511         iochan_setfd(i, fd); /* in case fd has changed */
1512     }
1513 }
1514
1515 /*
1516  * Encode response, and transfer the request structure to the outgoing queue.
1517  */
1518 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
1519 {
1520     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
1521
1522     if (assoc->print)
1523     {
1524         if (!z_GDU(assoc->print, &res, 0, 0))
1525             yaz_log(YLOG_WARN, "ODR print error: %s",
1526                 odr_errmsg(odr_geterror(assoc->print)));
1527         odr_reset(assoc->print);
1528     }
1529     if (!z_GDU(assoc->encode, &res, 0, 0))
1530     {
1531         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
1532                 odr_errmsg(odr_geterror(assoc->decode)),
1533                 odr_getelement(assoc->decode));
1534         return -1;
1535     }
1536     req->response = odr_getbuf(assoc->encode, &req->len_response,
1537         &req->size_response);
1538     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
1539     odr_reset(assoc->encode);
1540     req->state = REQUEST_IDLE;
1541     request_enq(&assoc->outgoing, req);
1542     /* turn the work over to the ir_session handler */
1543     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
1544     assoc->cs_put_mask = EVENT_OUTPUT;
1545     /* Is there more work to be done? give that to the input handler too */
1546 #if 1
1547     if (request_head(&assoc->incoming))
1548     {
1549         yaz_log (YLOG_DEBUG, "more work to be done");
1550         iochan_setevent(assoc->client_chan, EVENT_WORK);
1551     }
1552 #endif
1553     return 0;
1554 }
1555
1556 /*
1557  * Encode response, and transfer the request structure to the outgoing queue.
1558  */
1559 static int process_z_response(association *assoc, request *req, Z_APDU *res)
1560 {
1561     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
1562     gres->which = Z_GDU_Z3950;
1563     gres->u.z3950 = res;
1564
1565     return process_gdu_response(assoc, req, gres);
1566 }
1567
1568 static char *get_vhost(Z_OtherInformation *otherInfo)
1569 {
1570     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
1571 }
1572
1573 /*
1574  * Handle init request.
1575  * At the moment, we don't check the options
1576  * anywhere else in the code - we just try not to do anything that would
1577  * break a naive client. We'll toss 'em into the association block when
1578  * we need them there.
1579  */
1580 static Z_APDU *process_initRequest(association *assoc, request *reqb)
1581 {
1582     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
1583     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
1584     Z_InitResponse *resp = apdu->u.initResponse;
1585     bend_initresult *binitres;
1586     char *version;
1587     char options[140];
1588     statserv_options_block *cb = 0;  /* by default no control for backend */
1589
1590     if (control_association(assoc, get_vhost(req->otherInfo), 1))
1591         cb = statserv_getcontrol();  /* got control block for backend */
1592
1593     yaz_log(log_requestdetail, "Got initRequest");
1594     if (req->implementationId)
1595         yaz_log(log_requestdetail, "Id:        %s",
1596                 req->implementationId);
1597     if (req->implementationName)
1598         yaz_log(log_requestdetail, "Name:      %s",
1599                 req->implementationName);
1600     if (req->implementationVersion)
1601         yaz_log(log_requestdetail, "Version:   %s",
1602                 req->implementationVersion);
1603
1604     assoc_init_reset(assoc);
1605
1606     assoc->init->auth = req->idAuthentication;
1607     assoc->init->referenceId = req->referenceId;
1608
1609     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
1610     {
1611         Z_CharSetandLanguageNegotiation *negotiation =
1612             yaz_get_charneg_record (req->otherInfo);
1613         if (negotiation &&
1614             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
1615             assoc->init->charneg_request = negotiation;
1616     }
1617
1618     assoc->backend = 0;
1619     if (cb)
1620     {
1621         if (req->implementationVersion)
1622             yaz_log(log_requestdetail, "Config:    %s",
1623                     cb->configname);
1624
1625         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
1626
1627         /* we have a backend control block, so call that init function */
1628         if (!(binitres = (*cb->bend_init)(assoc->init)))
1629         {
1630             yaz_log(YLOG_WARN, "Bad response from backend.");
1631             return 0;
1632         }
1633         assoc->backend = binitres->handle;
1634     }
1635     else
1636     {
1637         /* no backend. return error */
1638         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
1639         binitres->errstring = 0;
1640         binitres->errcode = 1;
1641         iochan_settimeout(assoc->client_chan, 10);
1642     }
1643     if ((assoc->init->bend_sort))
1644         yaz_log (YLOG_DEBUG, "Sort handler installed");
1645     if ((assoc->init->bend_search))
1646         yaz_log (YLOG_DEBUG, "Search handler installed");
1647     if ((assoc->init->bend_present))
1648         yaz_log (YLOG_DEBUG, "Present handler installed");
1649     if ((assoc->init->bend_esrequest))
1650         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
1651     if ((assoc->init->bend_delete))
1652         yaz_log (YLOG_DEBUG, "Delete handler installed");
1653     if ((assoc->init->bend_scan))
1654         yaz_log (YLOG_DEBUG, "Scan handler installed");
1655     if ((assoc->init->bend_segment))
1656         yaz_log (YLOG_DEBUG, "Segment handler installed");
1657
1658     resp->referenceId = req->referenceId;
1659     *options = '\0';
1660     /* let's tell the client what we can do */
1661     if (ODR_MASK_GET(req->options, Z_Options_search))
1662     {
1663         ODR_MASK_SET(resp->options, Z_Options_search);
1664         strcat(options, "srch");
1665     }
1666     if (ODR_MASK_GET(req->options, Z_Options_present))
1667     {
1668         ODR_MASK_SET(resp->options, Z_Options_present);
1669         strcat(options, " prst");
1670     }
1671     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
1672         assoc->init->bend_delete)
1673     {
1674         ODR_MASK_SET(resp->options, Z_Options_delSet);
1675         strcat(options, " del");
1676     }
1677     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
1678         assoc->init->bend_esrequest)
1679     {
1680         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
1681         strcat (options, " extendedServices");
1682     }
1683     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
1684     {
1685         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
1686         strcat(options, " namedresults");
1687     }
1688     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
1689     {
1690         ODR_MASK_SET(resp->options, Z_Options_scan);
1691         strcat(options, " scan");
1692     }
1693     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
1694     {
1695         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
1696         strcat(options, " concurrop");
1697     }
1698     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
1699     {
1700         ODR_MASK_SET(resp->options, Z_Options_sort);
1701         strcat(options, " sort");
1702     }
1703
1704     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
1705         && assoc->init->charneg_response)
1706     {
1707         Z_OtherInformation **p;
1708         Z_OtherInformationUnit *p0;
1709
1710         yaz_oi_APDU(apdu, &p);
1711
1712         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
1713             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
1714
1715             p0->which = Z_OtherInfo_externallyDefinedInfo;
1716             p0->information.externallyDefinedInfo =
1717                 assoc->init->charneg_response;
1718         }
1719         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
1720         strcat(options, " negotiation");
1721     }
1722
1723     ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
1724
1725     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
1726     {
1727         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
1728         assoc->version = 1; /* 1 & 2 are equivalent */
1729     }
1730     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
1731     {
1732         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
1733         assoc->version = 2;
1734     }
1735     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
1736     {
1737         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
1738         assoc->version = 3;
1739     }
1740
1741     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
1742     assoc->maximumRecordSize = *req->maximumRecordSize;
1743
1744     if (cb && assoc->maximumRecordSize > cb->maxrecordsize)
1745         assoc->maximumRecordSize = cb->maxrecordsize;
1746     assoc->preferredMessageSize = *req->preferredMessageSize;
1747     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
1748         assoc->preferredMessageSize = assoc->maximumRecordSize;
1749
1750     resp->preferredMessageSize = &assoc->preferredMessageSize;
1751     resp->maximumRecordSize = &assoc->maximumRecordSize;
1752
1753     resp->implementationId = odr_prepend(assoc->encode,
1754                 assoc->init->implementation_id,
1755                 resp->implementationId);
1756
1757     resp->implementationName = odr_prepend(assoc->encode,
1758                 assoc->init->implementation_name,
1759                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
1760
1761     version = odr_strdup(assoc->encode, "$Revision: 1.50 $");
1762     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
1763         version[strlen(version)-2] = '\0';
1764     resp->implementationVersion = odr_prepend(assoc->encode,
1765                 assoc->init->implementation_version,
1766                 odr_prepend(assoc->encode, &version[11],
1767                             resp->implementationVersion));
1768
1769     if (binitres->errcode)
1770     {
1771         assoc->state = ASSOC_DEAD;
1772         resp->userInformationField =
1773             init_diagnostics(assoc->encode, binitres->errcode,
1774                              binitres->errstring);
1775         *resp->result = 0;
1776     }
1777     if (log_request)
1778     {
1779         WRBUF wr = wrbuf_alloc();
1780         wrbuf_printf(wr, "Init ");
1781         if (binitres->errcode)
1782             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
1783         else
1784             wrbuf_printf(wr, "OK -");
1785         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
1786                      (req->implementationId ? req->implementationId :"-"),
1787                      (req->implementationName ?
1788                       req->implementationName : "-"),
1789                      (req->implementationVersion ?
1790                       req->implementationVersion : "-")
1791             );
1792         yaz_log(log_request, "%s", wrbuf_buf(wr));
1793         wrbuf_free(wr, 1);
1794     }
1795     return apdu;
1796 }
1797
1798 /*
1799  * Set the specified `errcode' and `errstring' into a UserInfo-1
1800  * external to be returned to the client in accordance with Z35.90
1801  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
1802  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
1803  */
1804 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
1805 {
1806     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
1807         addinfo ? " -- " : "", addinfo ? addinfo : "");
1808     return zget_init_diagnostics(odr, error, addinfo);
1809 }
1810
1811 /*
1812  * nonsurrogate diagnostic record.
1813  */
1814 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
1815 {
1816     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
1817
1818     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
1819             addinfo ? " -- " : "", addinfo ? addinfo : "");
1820
1821     rec->which = Z_Records_NSD;
1822     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
1823                                                            error, addinfo);
1824     return rec;
1825 }
1826
1827 /*
1828  * surrogate diagnostic.
1829  */
1830 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
1831                                           const char *dbname,
1832                                           int error, const char *addinfo)
1833 {
1834     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
1835             addinfo ? " -- " : "", addinfo ? addinfo : "");
1836     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
1837 }
1838
1839 static Z_Records *pack_records(association *a, char *setname, int start,
1840                                int *num, Z_RecordComposition *comp,
1841                                int *next, int *pres, oid_value format,
1842                                Z_ReferenceId *referenceId,
1843                                int *oid, int *errcode)
1844 {
1845     int recno, total_length = 0, toget = *num, dumped_records = 0;
1846     Z_Records *records =
1847         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
1848     Z_NamePlusRecordList *reclist =
1849         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
1850     Z_NamePlusRecord **list =
1851         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
1852
1853     records->which = Z_Records_DBOSD;
1854     records->u.databaseOrSurDiagnostics = reclist;
1855     reclist->num_records = 0;
1856     reclist->records = list;
1857     *pres = Z_PresentStatus_success;
1858     *num = 0;
1859     *next = 0;
1860
1861     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
1862     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
1863         a->maximumRecordSize);
1864     for (recno = start; reclist->num_records < toget; recno++)
1865     {
1866         bend_fetch_rr freq;
1867         Z_NamePlusRecord *thisrec;
1868         int this_length = 0;
1869         /*
1870          * we get the number of bytes allocated on the stream before any
1871          * allocation done by the backend - this should give us a reasonable
1872          * idea of the total size of the data so far.
1873          */
1874         total_length = odr_total(a->encode) - dumped_records;
1875         freq.errcode = 0;
1876         freq.errstring = 0;
1877         freq.basename = 0;
1878         freq.len = 0;
1879         freq.record = 0;
1880         freq.last_in_set = 0;
1881         freq.setname = setname;
1882         freq.surrogate_flag = 0;
1883         freq.number = recno;
1884         freq.comp = comp;
1885         freq.request_format = format;
1886         freq.request_format_raw = oid;
1887         freq.output_format = format;
1888         freq.output_format_raw = 0;
1889         freq.stream = a->encode;
1890         freq.print = a->print;
1891         freq.referenceId = referenceId;
1892         freq.schema = 0;
1893         (*a->init->bend_fetch)(a->backend, &freq);
1894         /* backend should be able to signal whether error is system-wide
1895            or only pertaining to current record */
1896         if (freq.errcode)
1897         {
1898             if (!freq.surrogate_flag)
1899             {
1900                 char s[20];
1901                 *pres = Z_PresentStatus_failure;
1902                 /* for 'present request out of range',
1903                    set addinfo to record position if not set */
1904                 if (freq.errcode == 13 && freq.errstring == 0)
1905                 {
1906                     sprintf (s, "%d", recno);
1907                     freq.errstring = s;
1908                 }
1909                 if (errcode)
1910                     *errcode = freq.errcode;
1911                 return diagrec(a, freq.errcode, freq.errstring);
1912             }
1913             reclist->records[reclist->num_records] =
1914                 surrogatediagrec(a, freq.basename, freq.errcode,
1915                                  freq.errstring);
1916             reclist->num_records++;
1917             *next = freq.last_in_set ? 0 : recno + 1;
1918             continue;
1919         }
1920         if (freq.len >= 0)
1921             this_length = freq.len;
1922         else
1923             this_length = odr_total(a->encode) - total_length - dumped_records;
1924         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
1925             this_length, total_length, dumped_records);
1926         if (a->preferredMessageSize > 0 &&
1927                 this_length + total_length > a->preferredMessageSize)
1928         {
1929             /* record is small enough, really */
1930             if (this_length <= a->preferredMessageSize && recno > start)
1931             {
1932                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
1933                 *pres = Z_PresentStatus_partial_2;
1934                 break;
1935             }
1936             /* record can only be fetched by itself */
1937             if (this_length < a->maximumRecordSize)
1938             {
1939                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
1940                 if (toget > 1)
1941                 {
1942                     yaz_log(YLOG_DEBUG, "  Dropped it");
1943                     reclist->records[reclist->num_records] =
1944                          surrogatediagrec(a, freq.basename, 16, 0);
1945                     reclist->num_records++;
1946                     *next = freq.last_in_set ? 0 : recno + 1;
1947                     dumped_records += this_length;
1948                     continue;
1949                 }
1950             }
1951             else /* too big entirely */
1952             {
1953                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
1954                         this_length, a->maximumRecordSize);
1955                 reclist->records[reclist->num_records] =
1956                     surrogatediagrec(a, freq.basename, 17, 0);
1957                 reclist->num_records++;
1958                 *next = freq.last_in_set ? 0 : recno + 1;
1959                 dumped_records += this_length;
1960                 continue;
1961             }
1962         }
1963
1964         if (!(thisrec = (Z_NamePlusRecord *)
1965               odr_malloc(a->encode, sizeof(*thisrec))))
1966             return 0;
1967         if (!(thisrec->databaseName = (char *)odr_malloc(a->encode,
1968             strlen(freq.basename) + 1)))
1969             return 0;
1970         strcpy(thisrec->databaseName, freq.basename);
1971         thisrec->which = Z_NamePlusRecord_databaseRecord;
1972
1973         if (freq.output_format_raw)
1974         {
1975             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
1976             freq.output_format = ident->value;
1977         }
1978         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
1979                                                  freq.record, freq.len);
1980         if (!thisrec->u.databaseRecord)
1981             return 0;
1982         reclist->records[reclist->num_records] = thisrec;
1983         reclist->num_records++;
1984         *next = freq.last_in_set ? 0 : recno + 1;
1985     }
1986     *num = reclist->num_records;
1987     return records;
1988 }
1989
1990 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
1991     int *fd)
1992 {
1993     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
1994     bend_search_rr *bsrr =
1995         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
1996
1997     yaz_log(log_requestdetail, "Got SearchRequest.");
1998     bsrr->fd = fd;
1999     bsrr->request = reqb;
2000     bsrr->association = assoc;
2001     bsrr->referenceId = req->referenceId;
2002     save_referenceId (reqb, bsrr->referenceId);
2003
2004     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2005     if (req->databaseNames)
2006     {
2007         int i;
2008         for (i = 0; i < req->num_databaseNames; i++)
2009             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2010     }
2011
2012     yaz_log_zquery_level(log_requestdetail,req->query);
2013
2014     if (assoc->init->bend_search)
2015     {
2016         bsrr->setname = req->resultSetName;
2017         bsrr->replace_set = *req->replaceIndicator;
2018         bsrr->num_bases = req->num_databaseNames;
2019         bsrr->basenames = req->databaseNames;
2020         bsrr->query = req->query;
2021         bsrr->stream = assoc->encode;
2022         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2023         bsrr->decode = assoc->decode;
2024         bsrr->print = assoc->print;
2025         bsrr->hits = 0;
2026         bsrr->errcode = 0;
2027         bsrr->errstring = NULL;
2028         bsrr->search_info = NULL;
2029
2030         if (assoc->cql_transform &&
2031             req->query->which == Z_Query_type_104 &&
2032             req->query->u.type_104->which == Z_External_CQL)
2033         {
2034             /* have a CQL query and a CQL to PQF transform .. */
2035             int srw_errcode =
2036                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2037                         assoc->cql_transform, bsrr->query);
2038             if (srw_errcode)
2039                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2040         }
2041         if (!bsrr->errcode)
2042             (assoc->init->bend_search)(assoc->backend, bsrr);
2043         if (!bsrr->request)  /* backend not ready with the search response */
2044             return 0;  /* should not be used any more */
2045     }
2046     else
2047     {
2048         /* FIXME - make a diagnostic for it */
2049         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2050     }
2051     return response_searchRequest(assoc, reqb, bsrr, fd);
2052 }
2053
2054 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2055
2056 /*
2057  * Prepare a searchresponse based on the backend results. We probably want
2058  * to look at making the fetching of records nonblocking as well, but
2059  * so far, we'll keep things simple.
2060  * If bsrt is null, that means we're called in response to a communications
2061  * event, and we'll have to get the response for ourselves.
2062  */
2063 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2064     bend_search_rr *bsrt, int *fd)
2065 {
2066     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2067     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2068     Z_SearchResponse *resp = (Z_SearchResponse *)
2069         odr_malloc (assoc->encode, sizeof(*resp));
2070     int *nulint = odr_intdup (assoc->encode, 0);
2071     bool_t *sr = odr_intdup(assoc->encode, 1);
2072     int *next = odr_intdup(assoc->encode, 0);
2073     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2074     int returnedrecs=0;
2075
2076     apdu->which = Z_APDU_searchResponse;
2077     apdu->u.searchResponse = resp;
2078     resp->referenceId = req->referenceId;
2079     resp->additionalSearchInfo = 0;
2080     resp->otherInfo = 0;
2081     *fd = -1;
2082     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2083     {
2084         yaz_log(YLOG_FATAL, "Bad result from backend");
2085         return 0;
2086     }
2087     else if (bsrt->errcode)
2088     {
2089         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2090         resp->resultCount = nulint;
2091         resp->numberOfRecordsReturned = nulint;
2092         resp->nextResultSetPosition = nulint;
2093         resp->searchStatus = nulint;
2094         resp->resultSetStatus = none;
2095         resp->presentStatus = 0;
2096     }
2097     else
2098     {
2099         int *toget = odr_intdup(assoc->encode, 0);
2100         int *presst = odr_intdup(assoc->encode, 0);
2101         Z_RecordComposition comp, *compp = 0;
2102
2103         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2104
2105         resp->records = 0;
2106         resp->resultCount = &bsrt->hits;
2107
2108         comp.which = Z_RecordComp_simple;
2109         /* how many records does the user agent want, then? */
2110         if (bsrt->hits <= *req->smallSetUpperBound)
2111         {
2112             *toget = bsrt->hits;
2113             if ((comp.u.simple = req->smallSetElementSetNames))
2114                 compp = &comp;
2115         }
2116         else if (bsrt->hits < *req->largeSetLowerBound)
2117         {
2118             *toget = *req->mediumSetPresentNumber;
2119             if (*toget > bsrt->hits)
2120                 *toget = bsrt->hits;
2121             if ((comp.u.simple = req->mediumSetElementSetNames))
2122                 compp = &comp;
2123         }
2124         else
2125             *toget = 0;
2126
2127         if (*toget && !resp->records)
2128         {
2129             oident *prefformat;
2130             oid_value form;
2131
2132             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2133                 form = VAL_NONE;
2134             else
2135                 form = prefformat->value;
2136             resp->records = pack_records(assoc, req->resultSetName, 1,
2137                                          toget, compp, next, presst, form, req->referenceId,
2138                                          req->preferredRecordSyntax, NULL);
2139             if (!resp->records)
2140                 return 0;
2141             resp->numberOfRecordsReturned = toget;
2142             returnedrecs = *toget;
2143             resp->nextResultSetPosition = next;
2144             resp->searchStatus = sr;
2145             resp->resultSetStatus = 0;
2146             resp->presentStatus = presst;
2147         }
2148         else
2149         {
2150             if (*resp->resultCount)
2151                 *next = 1;
2152             resp->numberOfRecordsReturned = nulint;
2153             resp->nextResultSetPosition = next;
2154             resp->searchStatus = sr;
2155             resp->resultSetStatus = 0;
2156             resp->presentStatus = 0;
2157         }
2158     }
2159     resp->additionalSearchInfo = bsrt->search_info;
2160
2161     if (log_request)
2162     {
2163         WRBUF wr = wrbuf_alloc();
2164         if (bsrt->errcode)
2165             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2166         else
2167             wrbuf_printf(wr, "OK %d", bsrt->hits);
2168         wrbuf_printf(wr, " %s 1+%d ",
2169                      req->resultSetName, returnedrecs);
2170         wrbuf_put_zquery(wr, req->query);
2171
2172         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2173         wrbuf_free(wr, 1);
2174     }
2175     return apdu;
2176 }
2177
2178 /*
2179  * Maybe we got a little over-friendly when we designed bend_fetch to
2180  * get only one record at a time. Some backends can optimise multiple-record
2181  * fetches, and at any rate, there is some overhead involved in
2182  * all that selecting and hopping around. Problem is, of course, that the
2183  * frontend can't know ahead of time how many records it'll need to
2184  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2185  * is downright lousy as a bulk data transfer protocol.
2186  *
2187  * To start with, we'll do the fetching of records from the backend
2188  * in one operation: To save some trips in and out of the event-handler,
2189  * and to simplify the interface to pack_records. At any rate, asynch
2190  * operation is more fun in operations that have an unpredictable execution
2191  * speed - which is normally more true for search than for present.
2192  */
2193 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2194                                       int *fd)
2195 {
2196     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2197     oident *prefformat;
2198     oid_value form;
2199     Z_APDU *apdu;
2200     Z_PresentResponse *resp;
2201     int *next;
2202     int *num;
2203     int errcode = 0;
2204     const char *errstring = 0;
2205
2206     yaz_log(log_requestdetail, "Got PresentRequest.");
2207
2208     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2209         form = VAL_NONE;
2210     else
2211         form = prefformat->value;
2212     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2213     resp->records = 0;
2214     resp->presentStatus = odr_intdup(assoc->encode, 0);
2215     if (assoc->init->bend_present)
2216     {
2217         bend_present_rr *bprr = (bend_present_rr *)
2218             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2219         bprr->setname = req->resultSetId;
2220         bprr->start = *req->resultSetStartPoint;
2221         bprr->number = *req->numberOfRecordsRequested;
2222         bprr->format = form;
2223         bprr->comp = req->recordComposition;
2224         bprr->referenceId = req->referenceId;
2225         bprr->stream = assoc->encode;
2226         bprr->print = assoc->print;
2227         bprr->request = reqb;
2228         bprr->association = assoc;
2229         bprr->errcode = 0;
2230         bprr->errstring = NULL;
2231         (*assoc->init->bend_present)(assoc->backend, bprr);
2232
2233         if (!bprr->request)
2234             return 0; /* should not happen */
2235         if (bprr->errcode)
2236         {
2237             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2238             *resp->presentStatus = Z_PresentStatus_failure;
2239             errcode = bprr->errcode;
2240             errstring = bprr->errstring;
2241         }
2242     }
2243     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2244     next = odr_intdup(assoc->encode, 0);
2245     num = odr_intdup(assoc->encode, 0);
2246
2247     apdu->which = Z_APDU_presentResponse;
2248     apdu->u.presentResponse = resp;
2249     resp->referenceId = req->referenceId;
2250     resp->otherInfo = 0;
2251
2252     if (!resp->records)
2253     {
2254         *num = *req->numberOfRecordsRequested;
2255         resp->records =
2256             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2257                          num, req->recordComposition, next,
2258                          resp->presentStatus,
2259                          form, req->referenceId, req->preferredRecordSyntax,
2260                          &errcode);
2261     }
2262     if (log_request)
2263     {
2264         WRBUF wr = wrbuf_alloc();
2265         wrbuf_printf(wr, "Present ");
2266
2267         if (*resp->presentStatus == Z_PresentStatus_failure)
2268             wrbuf_printf(wr, "ERROR %d", errcode);
2269         else if (*resp->presentStatus == Z_PresentStatus_success)
2270             wrbuf_printf(wr, "OK -");
2271         else
2272             wrbuf_printf(wr, "Partial %d", *resp->presentStatus);
2273
2274         wrbuf_printf(wr, " %s %d+%d ",
2275                 req->resultSetId, *req->resultSetStartPoint,
2276                 *req->numberOfRecordsRequested);
2277         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2278         wrbuf_free(wr, 1);
2279     }
2280     if (!resp->records)
2281         return 0;
2282     resp->numberOfRecordsReturned = num;
2283     resp->nextResultSetPosition = next;
2284
2285     return apdu;
2286 }
2287
2288 /*
2289  * Scan was implemented rather in a hurry, and with support for only the basic
2290  * elements of the service in the backend API. Suggestions are welcome.
2291  */
2292 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2293 {
2294     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2295     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2296     Z_ScanResponse *res = (Z_ScanResponse *)
2297         odr_malloc (assoc->encode, sizeof(*res));
2298     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2299     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2300     Z_ListEntries *ents = (Z_ListEntries *)
2301         odr_malloc (assoc->encode, sizeof(*ents));
2302     Z_DiagRecs *diagrecs_p = NULL;
2303     oident *attset;
2304     bend_scan_rr *bsrr = (bend_scan_rr *)
2305         odr_malloc (assoc->encode, sizeof(*bsrr));
2306     struct scan_entry *save_entries;
2307
2308     yaz_log(log_requestdetail, "Got ScanRequest");
2309
2310     apdu->which = Z_APDU_scanResponse;
2311     apdu->u.scanResponse = res;
2312     res->referenceId = req->referenceId;
2313
2314     /* if step is absent, set it to 0 */
2315     res->stepSize = odr_intdup(assoc->encode, 0);
2316     if (req->stepSize)
2317         *res->stepSize = *req->stepSize;
2318
2319     res->scanStatus = scanStatus;
2320     res->numberOfEntriesReturned = numberOfEntriesReturned;
2321     res->positionOfTerm = 0;
2322     res->entries = ents;
2323     ents->num_entries = 0;
2324     ents->entries = NULL;
2325     ents->num_nonsurrogateDiagnostics = 0;
2326     ents->nonsurrogateDiagnostics = NULL;
2327     res->attributeSet = 0;
2328     res->otherInfo = 0;
2329
2330     if (req->databaseNames)
2331     {
2332         int i;
2333         for (i = 0; i < req->num_databaseNames; i++)
2334             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2335     }
2336     yaz_log(log_requestdetail, "pos %d  step %d  entries %d",
2337             *req->preferredPositionInResponse, *res->stepSize,
2338             *req->numberOfTermsRequested);
2339     bsrr->num_bases = req->num_databaseNames;
2340     bsrr->basenames = req->databaseNames;
2341     bsrr->num_entries = *req->numberOfTermsRequested;
2342     bsrr->term = req->termListAndStartPoint;
2343     bsrr->referenceId = req->referenceId;
2344     bsrr->stream = assoc->encode;
2345     bsrr->print = assoc->print;
2346     bsrr->step_size = res->stepSize;
2347     bsrr->entries = 0;
2348     /* For YAZ 2.0 and earlier it was the backend handler that
2349        initialized entries (member display_term did not exist)
2350        YAZ 2.0 and later sets 'entries'  and initialize all members
2351        including 'display_term'. If YAZ 2.0 or later sees that
2352        entries was modified - we assume that it is an old handler and
2353        that 'display_term' is _not_ set.
2354     */
2355     if (bsrr->num_entries > 0)
2356     {
2357         int i;
2358         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
2359                                    bsrr->num_entries);
2360         for (i = 0; i<bsrr->num_entries; i++)
2361         {
2362             bsrr->entries[i].term = 0;
2363             bsrr->entries[i].occurrences = 0;
2364             bsrr->entries[i].errcode = 0;
2365             bsrr->entries[i].errstring = 0;
2366             bsrr->entries[i].display_term = 0;
2367         }
2368     }
2369     save_entries = bsrr->entries;  /* save it so we can compare later */
2370
2371     if (req->attributeSet &&
2372         (attset = oid_getentbyoid(req->attributeSet)) &&
2373         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
2374         bsrr->attributeset = attset->value;
2375     else
2376         bsrr->attributeset = VAL_NONE;
2377     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
2378             bsrr->attributeset);
2379     bsrr->term_position = req->preferredPositionInResponse ?
2380         *req->preferredPositionInResponse : 1;
2381
2382     ((int (*)(void *, bend_scan_rr *))
2383      (*assoc->init->bend_scan))(assoc->backend, bsrr);
2384
2385     if (bsrr->errcode)
2386         diagrecs_p = zget_DiagRecs(assoc->encode,
2387                                    bsrr->errcode, bsrr->errstring);
2388     else
2389     {
2390         int i;
2391         Z_Entry **tab = (Z_Entry **)
2392             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
2393
2394         if (bsrr->status == BEND_SCAN_PARTIAL)
2395             *scanStatus = Z_Scan_partial_5;
2396         else
2397             *scanStatus = Z_Scan_success;
2398         ents->entries = tab;
2399         ents->num_entries = bsrr->num_entries;
2400         res->numberOfEntriesReturned = &ents->num_entries;
2401         res->positionOfTerm = &bsrr->term_position;
2402         for (i = 0; i < bsrr->num_entries; i++)
2403         {
2404             Z_Entry *e;
2405             Z_TermInfo *t;
2406             Odr_oct *o;
2407
2408             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
2409             if (bsrr->entries[i].occurrences >= 0)
2410             {
2411                 e->which = Z_Entry_termInfo;
2412                 e->u.termInfo = t = (Z_TermInfo *)
2413                     odr_malloc(assoc->encode, sizeof(*t));
2414                 t->suggestedAttributes = 0;
2415                 t->displayTerm = 0;
2416                 if (save_entries == bsrr->entries &&
2417                     bsrr->entries[i].display_term)
2418                 {
2419                     /* the entries was _not_ set by the handler. So it's
2420                        safe to test for new member display_term. It is
2421                        NULL'ed by us.
2422                     */
2423                     t->displayTerm = odr_strdup(assoc->encode,
2424                                                 bsrr->entries[i].display_term);
2425                 }
2426                 t->alternativeTerm = 0;
2427                 t->byAttributes = 0;
2428                 t->otherTermInfo = 0;
2429                 t->globalOccurrences = &bsrr->entries[i].occurrences;
2430                 t->term = (Z_Term *)
2431                     odr_malloc(assoc->encode, sizeof(*t->term));
2432                 t->term->which = Z_Term_general;
2433                 t->term->u.general = o =
2434                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
2435                 o->buf = (unsigned char *)
2436                     odr_malloc(assoc->encode, o->len = o->size =
2437                                strlen(bsrr->entries[i].term));
2438                 memcpy(o->buf, bsrr->entries[i].term, o->len);
2439                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
2440                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
2441             }
2442             else
2443             {
2444                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
2445                                                   bsrr->entries[i].errcode,
2446                                                   bsrr->entries[i].errstring);
2447                 assert (drecs->num_diagRecs == 1);
2448                 e->which = Z_Entry_surrogateDiagnostic;
2449                 assert (drecs->diagRecs[0]);
2450                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
2451             }
2452         }
2453     }
2454     if (diagrecs_p)
2455     {
2456         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
2457         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
2458     }
2459     if (log_request)
2460     {
2461         WRBUF wr = wrbuf_alloc();
2462         if (bsrr->errcode)
2463             wr_diag(wr, bsrr->errcode, bsrr->errstring);
2464         else if (*res->scanStatus == Z_Scan_success)
2465             wrbuf_printf(wr, "OK");
2466         else
2467             wrbuf_printf(wr, "Partial");
2468
2469         wrbuf_printf(wr, " %d+%d %d ",
2470                      *req->preferredPositionInResponse,
2471                      *req->numberOfTermsRequested,
2472                      (res->stepSize ? *res->stepSize : 0));
2473         wrbuf_scan_term(wr, req->termListAndStartPoint,
2474                         bsrr->attributeset);
2475
2476         yaz_log(log_request, "Scan %s", wrbuf_buf(wr) );
2477         wrbuf_free(wr, 1);
2478     }
2479     return apdu;
2480 }
2481
2482 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
2483     int *fd)
2484 {
2485     int i;
2486     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
2487     Z_SortResponse *res = (Z_SortResponse *)
2488         odr_malloc (assoc->encode, sizeof(*res));
2489     bend_sort_rr *bsrr = (bend_sort_rr *)
2490         odr_malloc (assoc->encode, sizeof(*bsrr));
2491
2492     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2493
2494     yaz_log(log_requestdetail, "Got SortRequest.");
2495
2496     bsrr->num_input_setnames = req->num_inputResultSetNames;
2497     for (i=0;i<req->num_inputResultSetNames;i++)
2498         yaz_log(log_requestdetail, "Input resultset: '%s'",
2499                 req->inputResultSetNames[i]);
2500     bsrr->input_setnames = req->inputResultSetNames;
2501     bsrr->referenceId = req->referenceId;
2502     bsrr->output_setname = req->sortedResultSetName;
2503     yaz_log(log_requestdetail, "Output resultset: '%s'",
2504                 req->sortedResultSetName);
2505     bsrr->sort_sequence = req->sortSequence;
2506        /*FIXME - dump those sequences too */
2507     bsrr->stream = assoc->encode;
2508     bsrr->print = assoc->print;
2509
2510     bsrr->sort_status = Z_SortResponse_failure;
2511     bsrr->errcode = 0;
2512     bsrr->errstring = 0;
2513
2514     (*assoc->init->bend_sort)(assoc->backend, bsrr);
2515
2516     res->referenceId = bsrr->referenceId;
2517     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
2518     res->resultSetStatus = 0;
2519     if (bsrr->errcode)
2520     {
2521         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
2522                                        bsrr->errcode, bsrr->errstring);
2523         res->diagnostics = dr->diagRecs;
2524         res->num_diagnostics = dr->num_diagRecs;
2525     }
2526     else
2527     {
2528         res->num_diagnostics = 0;
2529         res->diagnostics = 0;
2530     }
2531     res->resultCount = 0;
2532     res->otherInfo = 0;
2533
2534     apdu->which = Z_APDU_sortResponse;
2535     apdu->u.sortResponse = res;
2536     if (log_request)
2537     {
2538         WRBUF wr = wrbuf_alloc();
2539         wrbuf_printf(wr, "Sort ");
2540         if (bsrr->errcode)
2541             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
2542         else
2543             wrbuf_printf(wr,  "OK -");
2544         wrbuf_printf(wr, " (");
2545         for (i = 0; i<req->num_inputResultSetNames; i++)
2546         {
2547             if (i)
2548                 wrbuf_printf(wr, ",");
2549             wrbuf_printf(wr, req->inputResultSetNames[i]);
2550         }
2551         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
2552
2553         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2554         wrbuf_free(wr, 1);
2555     }
2556     return apdu;
2557 }
2558
2559 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
2560     int *fd)
2561 {
2562     int i;
2563     Z_DeleteResultSetRequest *req =
2564         reqb->apdu_request->u.deleteResultSetRequest;
2565     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
2566         odr_malloc (assoc->encode, sizeof(*res));
2567     bend_delete_rr *bdrr = (bend_delete_rr *)
2568         odr_malloc (assoc->encode, sizeof(*bdrr));
2569     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2570
2571     yaz_log(log_requestdetail, "Got DeleteRequest.");
2572
2573     bdrr->num_setnames = req->num_resultSetList;
2574     bdrr->setnames = req->resultSetList;
2575     for (i = 0; i<req->num_resultSetList; i++)
2576         yaz_log(log_requestdetail, "resultset: '%s'",
2577                 req->resultSetList[i]);
2578     bdrr->stream = assoc->encode;
2579     bdrr->print = assoc->print;
2580     bdrr->function = *req->deleteFunction;
2581     bdrr->referenceId = req->referenceId;
2582     bdrr->statuses = 0;
2583     if (bdrr->num_setnames > 0)
2584     {
2585         bdrr->statuses = (int*)
2586             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
2587                        bdrr->num_setnames);
2588         for (i = 0; i < bdrr->num_setnames; i++)
2589             bdrr->statuses[i] = 0;
2590     }
2591     (*assoc->init->bend_delete)(assoc->backend, bdrr);
2592
2593     res->referenceId = req->referenceId;
2594
2595     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
2596
2597     res->deleteListStatuses = 0;
2598     if (bdrr->num_setnames > 0)
2599     {
2600         int i;
2601         res->deleteListStatuses = (Z_ListStatuses *)
2602             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
2603         res->deleteListStatuses->num = bdrr->num_setnames;
2604         res->deleteListStatuses->elements =
2605             (Z_ListStatus **)
2606             odr_malloc (assoc->encode,
2607                         sizeof(*res->deleteListStatuses->elements) *
2608                         bdrr->num_setnames);
2609         for (i = 0; i<bdrr->num_setnames; i++)
2610         {
2611             res->deleteListStatuses->elements[i] =
2612                 (Z_ListStatus *)
2613                 odr_malloc (assoc->encode,
2614                             sizeof(**res->deleteListStatuses->elements));
2615             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
2616             res->deleteListStatuses->elements[i]->id =
2617                 odr_strdup (assoc->encode, bdrr->setnames[i]);
2618         }
2619     }
2620     res->numberNotDeleted = 0;
2621     res->bulkStatuses = 0;
2622     res->deleteMessage = 0;
2623     res->otherInfo = 0;
2624
2625     apdu->which = Z_APDU_deleteResultSetResponse;
2626     apdu->u.deleteResultSetResponse = res;
2627     if (log_request)
2628     {
2629         WRBUF wr = wrbuf_alloc();
2630         wrbuf_printf(wr, "Delete ");
2631         if (bdrr->delete_status)
2632             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
2633         else
2634             wrbuf_printf(wr, "OK -");
2635         for (i = 0; i<req->num_resultSetList; i++)
2636             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
2637         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2638         wrbuf_free(wr, 1);
2639     }
2640     return apdu;
2641 }
2642
2643 static void process_close(association *assoc, request *reqb)
2644 {
2645     Z_Close *req = reqb->apdu_request->u.close;
2646     static char *reasons[] =
2647     {
2648         "finished",
2649         "shutdown",
2650         "systemProblem",
2651         "costLimit",
2652         "resources",
2653         "securityViolation",
2654         "protocolError",
2655         "lackOfActivity",
2656         "peerAbort",
2657         "unspecified"
2658     };
2659
2660     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
2661         reasons[*req->closeReason], req->diagnosticInformation ?
2662         req->diagnosticInformation : "NULL");
2663     if (assoc->version < 3) /* to make do_force respond with close */
2664         assoc->version = 3;
2665     do_close_req(assoc, Z_Close_finished,
2666                  "Association terminated by client", reqb);
2667     yaz_log(log_request,"Close OK");
2668 }
2669
2670 void save_referenceId (request *reqb, Z_ReferenceId *refid)
2671 {
2672     if (refid)
2673     {
2674         reqb->len_refid = refid->len;
2675         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
2676         memcpy (reqb->refid, refid->buf, refid->len);
2677     }
2678     else
2679     {
2680         reqb->len_refid = 0;
2681         reqb->refid = NULL;
2682     }
2683 }
2684
2685 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
2686 {
2687     process_z_response (a, req, res);
2688 }
2689
2690 bend_request bend_request_mk (bend_association a)
2691 {
2692     request *nreq = request_get (&a->outgoing);
2693     nreq->request_mem = nmem_create ();
2694     return nreq;
2695 }
2696
2697 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
2698 {
2699     Z_ReferenceId *id;
2700     if (!req->refid)
2701         return 0;
2702     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
2703     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
2704     id->len = id->size = req->len_refid;
2705     memcpy (id->buf, req->refid, req->len_refid);
2706     return id;
2707 }
2708
2709 void bend_request_destroy (bend_request *req)
2710 {
2711     nmem_destroy((*req)->request_mem);
2712     request_release(*req);
2713     *req = NULL;
2714 }
2715
2716 int bend_backend_respond (bend_association a, bend_request req)
2717 {
2718     char *msg;
2719     int r;
2720     r = process_z_request (a, req, &msg);
2721     if (r < 0)
2722         yaz_log (YLOG_WARN, "%s", msg);
2723     return r;
2724 }
2725
2726 void bend_request_setdata(bend_request r, void *p)
2727 {
2728     r->clientData = p;
2729 }
2730
2731 void *bend_request_getdata(bend_request r)
2732 {
2733     return r->clientData;
2734 }
2735
2736 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
2737 {
2738     bend_segment_rr req;
2739
2740     req.segment = reqb->apdu_request->u.segmentRequest;
2741     req.stream = assoc->encode;
2742     req.decode = assoc->decode;
2743     req.print = assoc->print;
2744     req.association = assoc;
2745
2746     (*assoc->init->bend_segment)(assoc->backend, &req);
2747
2748     return 0;
2749 }
2750
2751 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
2752 {
2753     bend_esrequest_rr esrequest;
2754
2755     Z_ExtendedServicesRequest *req =
2756         reqb->apdu_request->u.extendedServicesRequest;
2757     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
2758
2759     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
2760
2761     yaz_log(log_requestdetail,"Got EsRequest");
2762
2763     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
2764     esrequest.stream = assoc->encode;
2765     esrequest.decode = assoc->decode;
2766     esrequest.print = assoc->print;
2767     esrequest.errcode = 0;
2768     esrequest.errstring = NULL;
2769     esrequest.request = reqb;
2770     esrequest.association = assoc;
2771     esrequest.taskPackage = 0;
2772     esrequest.referenceId = req->referenceId;
2773
2774     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
2775
2776     /* If the response is being delayed, return NULL */
2777     if (esrequest.request == NULL)
2778         return(NULL);
2779
2780     resp->referenceId = req->referenceId;
2781
2782     if (esrequest.errcode == -1)
2783     {
2784         /* Backend service indicates request will be processed */
2785         yaz_log(log_request,"EsRequest OK: Accepted !");
2786         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
2787     }
2788     else if (esrequest.errcode == 0)
2789     {
2790         /* Backend service indicates request will be processed */
2791         yaz_log(log_request,"EsRequest OK: Done !");
2792         *resp->operationStatus = Z_ExtendedServicesResponse_done;
2793     }
2794     else
2795     {
2796         Z_DiagRecs *diagRecs =
2797             zget_DiagRecs(assoc->encode, esrequest.errcode,
2798                           esrequest.errstring);
2799         /* Backend indicates error, request will not be processed */
2800         yaz_log(YLOG_DEBUG,"Request could not be processed...failure !");
2801         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
2802         resp->num_diagnostics = diagRecs->num_diagRecs;
2803         resp->diagnostics = diagRecs->diagRecs;
2804         if (log_request)
2805         {
2806             WRBUF wr = wrbuf_alloc();
2807             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
2808             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
2809             wrbuf_free(wr, 1);
2810         }
2811
2812     }
2813     /* Do something with the members of bend_extendedservice */
2814     if (esrequest.taskPackage)
2815         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
2816                                          (const char *)  esrequest.taskPackage,
2817                                           -1);
2818     yaz_log(YLOG_DEBUG,"Send the result apdu");
2819     return apdu;
2820 }
2821