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 1.70 2006-03-15 14:12:26 marc Exp $
   6  */
   7 /**
   8  * \file seshigh.c
   9  * \brief Implements GFS session logic.
  10  *
  11  * Frontend server logic.
  12  *
  13  * This code receives incoming APDUs, and handles client requests by means
  14  * of the backend API.
  15  *
  16  * Some of the code is getting quite involved, compared to simpler servers -
  17  * primarily because it is asynchronous both in the communication with
  18  * the user and the backend. We think the complexity will pay off in
  19  * the form of greater flexibility when more asynchronous facilities
  20  * are implemented.
  21  *
  22  * Memory management has become somewhat involved. In the simple case, where
  23  * only one PDU is pending at a time, it will simply reuse the same memory,
  24  * once it has found its working size. When we enable multiple concurrent
  25  * operations, perhaps even with multiple parallel calls to the backend, it
  26  * will maintain a pool of buffers for encoding and decoding, trying to
  27  * minimize memory allocation/deallocation during normal operation.
  28  *
  29  */
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34 #include <ctype.h>
  35
  36 #if HAVE_SYS_TYPES_H
  37 #include <sys/types.h>
  38 #endif
  39 #if HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifdef WIN32
  44 #include <io.h>
  45 #define S_ISREG(x) (x & _S_IFREG)
  46 #include <process.h>
  47 #endif
  48
  49 #if HAVE_UNISTD_H
  50 #include <unistd.h>
  51 #endif
  52
  53 #if HAVE_XML2
  54 #include <libxml/parser.h>
  55 #include <libxml/tree.h>
  56 #endif
  57
  58 #include <yaz/yconfig.h>
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75
  76 #include <yaz/srw.h>
  77 #include <yaz/backend.h>
  78
  79 static void process_gdu_request(association *assoc, request *req);
  80 static int process_z_request(association *assoc, request *req, char **msg);
  81 void backend_response(IOCHAN i, int event);
  82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  85 static Z_External *init_diagnostics(ODR odr, int errcode,
  86                                     const char *errstring);
  87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  88     int *fd);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90     bend_search_rr *bsrr, int *fd);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  92     int *fd);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  95 static void process_close(association *assoc, request *reqb);
  96 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  98     int *fd);
  99 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 100
 101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 102
 103 /* dynamic logging levels */
 104 static int logbits_set = 0;
 105 static int log_session = 0;
 106 static int log_request = 0; /* one-line logs for requests */
 107 static int log_requestdetail = 0;  /* more detailed stuff */
 108
 109 /** get_logbits sets global loglevel bits */
 110 static void get_logbits()
 111 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 112     if (!logbits_set)
 113     {
 114         logbits_set = 1;
 115         log_session = yaz_log_module_level("session");
 116         log_request = yaz_log_module_level("request");
 117         log_requestdetail = yaz_log_module_level("requestdetail");
 118     }
 119 }
 120
 121 static void wr_diag(WRBUF w, int error, const char *addinfo)
 122 {
 123     wrbuf_printf(w, "ERROR [%d] %s%s%s",
 124                  error, diagbib1_str(error),
 125                  addinfo ? "--" : "", addinfo ? addinfo : "");
 126 }
 127
 128
 129 /*
 130  * Create and initialize a new association-handle.
 131  *  channel  : iochannel for the current line.
 132  *  link     : communications channel.
 133  * Returns: 0 or a new association handle.
 134  */
 135 association *create_association(IOCHAN channel, COMSTACK link,
 136                                 const char *apdufile)
 137 {
 138     association *anew;
 139
 140     if (!logbits_set)
 141         get_logbits();
 142     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 143         return 0;
 144     anew->init = 0;
 145     anew->version = 0;
 146     anew->last_control = 0;
 147     anew->client_chan = channel;
 148     anew->client_link = link;
 149     anew->cs_get_mask = 0;
 150     anew->cs_put_mask = 0;
 151     anew->cs_accept_mask = 0;
 152     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 153         !(anew->encode = odr_createmem(ODR_ENCODE)))
 154         return 0;
 155     if (apdufile && *apdufile)
 156     {
 157         FILE *f;
 158
 159         if (!(anew->print = odr_createmem(ODR_PRINT)))
 160             return 0;
 161         if (*apdufile == '@')
 162         {
 163             odr_setprint(anew->print, yaz_log_file());
 164         }
 165         else if (*apdufile != '-')
 166         {
 167             char filename[256];
 168             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 169             if (!(f = fopen(filename, "w")))
 170             {
 171                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 172                 return 0;
 173             }
 174             setvbuf(f, 0, _IONBF, 0);
 175             odr_setprint(anew->print, f);
 176         }
 177     }
 178     else
 179         anew->print = 0;
 180     anew->input_buffer = 0;
 181     anew->input_buffer_len = 0;
 182     anew->backend = 0;
 183     anew->state = ASSOC_NEW;
 184     request_initq(&anew->incoming);
 185     request_initq(&anew->outgoing);
 186     anew->proto = cs_getproto(link);
 187     anew->cql_transform = 0;
 188     anew->server_node_ptr = 0;
 189     return anew;
 190 }
 191
 192 /*
 193  * Free association and release resources.
 194  */
 195 void destroy_association(association *h)
 196 {
 197     statserv_options_block *cb = statserv_getcontrol();
 198     request *req;
 199
 200     xfree(h->init);
 201     odr_destroy(h->decode);
 202     odr_destroy(h->encode);
 203     if (h->print)
 204         odr_destroy(h->print);
 205     if (h->input_buffer)
 206     xfree(h->input_buffer);
 207     if (h->backend)
 208         (*cb->bend_close)(h->backend);
 209     while ((req = request_deq(&h->incoming)))
 210         request_release(req);
 211     while ((req = request_deq(&h->outgoing)))
 212         request_release(req);
 213     request_delq(&h->incoming);
 214     request_delq(&h->outgoing);
 215     xfree(h);
 216     xmalloc_trav("session closed");
 217     if (cb && cb->one_shot)
 218     {
 219         exit (0);
 220     }
 221 }
 222
 223 static void do_close_req(association *a, int reason, char *message,
 224                          request *req)
 225 {
 226     Z_APDU apdu;
 227     Z_Close *cls = zget_Close(a->encode);
 228
 229     /* Purge request queue */
 230     while (request_deq(&a->incoming));
 231     while (request_deq(&a->outgoing));
 232     if (a->version >= 3)
 233     {
 234         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 235             reason, message ? message : "none");
 236         apdu.which = Z_APDU_close;
 237         apdu.u.close = cls;
 238         *cls->closeReason = reason;
 239         cls->diagnosticInformation = message;
 240         process_z_response(a, req, &apdu);
 241         iochan_settimeout(a->client_chan, 20);
 242     }
 243     else
 244     {
 245         request_release(req);
 246         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 247         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 248         a->cs_put_mask = 0;
 249     }
 250     a->state = ASSOC_DEAD;
 251 }
 252
 253 static void do_close(association *a, int reason, char *message)
 254 {
 255     request *req = request_get(&a->outgoing);
 256     do_close_req (a, reason, message, req);
 257 }
 258
 259 /*
 260  * This is where PDUs from the client are read and the further
 261  * processing is initiated. Flow of control moves down through the
 262  * various process_* functions below, until the encoded result comes back up
 263  * to the output handler in here.
 264  *
 265  *  h     : the I/O channel that has an outstanding event.
 266  *  event : the current outstanding event.
 267  */
 268 void ir_session(IOCHAN h, int event)
 269 {
 270     int res;
 271     association *assoc = (association *)iochan_getdata(h);
 272     COMSTACK conn = assoc->client_link;
 273     request *req;
 274
 275     assert(h && conn && assoc);
 276     if (event == EVENT_TIMEOUT)
 277     {
 278         if (assoc->state != ASSOC_UP)
 279         {
 280             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 281             /* do we need to lod this at all */
 282             cs_close(conn);
 283             destroy_association(assoc);
 284             iochan_destroy(h);
 285         }
 286         else
 287         {
 288             yaz_log(log_session, "Session idle too long. Sending close.");
 289             do_close(assoc, Z_Close_lackOfActivity, 0);
 290         }
 291         return;
 292     }
 293     if (event & assoc->cs_accept_mask)
 294     {
 295         if (!cs_accept (conn))
 296         {
 297             yaz_log (YLOG_WARN, "accept failed");
 298             destroy_association(assoc);
 299             iochan_destroy(h);
 300         }
 301         iochan_clearflag (h, EVENT_OUTPUT);
 302         if (conn->io_pending)
 303         {   /* cs_accept didn't complete */
 304             assoc->cs_accept_mask =
 305                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 306                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 307
 308             iochan_setflag (h, assoc->cs_accept_mask);
 309         }
 310         else
 311         {   /* cs_accept completed. Prepare for reading (cs_get) */
 312             assoc->cs_accept_mask = 0;
 313             assoc->cs_get_mask = EVENT_INPUT;
 314             iochan_setflag (h, assoc->cs_get_mask);
 315         }
 316         return;
 317     }
 318     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 319     {
 320         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 321         {
 322             yaz_log(YLOG_DEBUG, "ir_session (input)");
 323             /* We aren't speaking to this fellow */
 324             if (assoc->state == ASSOC_DEAD)
 325             {
 326                 yaz_log(log_session, "Connection closed - end of session");
 327                 cs_close(conn);
 328                 destroy_association(assoc);
 329                 iochan_destroy(h);
 330                 return;
 331             }
 332             assoc->cs_get_mask = EVENT_INPUT;
 333             if ((res = cs_get(conn, &assoc->input_buffer,
 334                 &assoc->input_buffer_len)) <= 0)
 335             {
 336                 yaz_log(log_session, "Connection closed by client");
 337                 cs_close(conn);
 338                 destroy_association(assoc);
 339                 iochan_destroy(h);
 340                 return;
 341             }
 342             else if (res == 1) /* incomplete read - wait for more  */
 343             {
 344                 if (conn->io_pending & CS_WANT_WRITE)
 345                     assoc->cs_get_mask |= EVENT_OUTPUT;
 346                 iochan_setflag(h, assoc->cs_get_mask);
 347                 return;
 348             }
 349             if (cs_more(conn)) /* more stuff - call us again later, please */
 350                 iochan_setevent(h, EVENT_INPUT);
 351
 352             /* we got a complete PDU. Let's decode it */
 353             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 354                             assoc->input_buffer[0] & 0xff,
 355                             assoc->input_buffer[1] & 0xff,
 356                             assoc->input_buffer[2] & 0xff);
 357             req = request_get(&assoc->incoming); /* get a new request */
 358             odr_reset(assoc->decode);
 359             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 360             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 361             {
 362                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 363                         "[near byte %d] ",
 364                         odr_errmsg(odr_geterror(assoc->decode)),
 365                         odr_getelement(assoc->decode),
 366                         odr_offset(assoc->decode));
 367                 if (assoc->decode->error != OHTTP)
 368                 {
 369                     yaz_log(YLOG_WARN, "PDU dump:");
 370                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 371                     request_release(req);
 372                     do_close(assoc, Z_Close_protocolError,"Malformed package");
 373                 }
 374                 else
 375                 {
 376                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 377                     assoc->state = ASSOC_DEAD;
 378                     process_gdu_response(assoc, req, p);
 379                 }
 380                 return;
 381             }
 382             req->request_mem = odr_extract_mem(assoc->decode);
 383             if (assoc->print)
 384             {
 385                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 386                     yaz_log(YLOG_WARN, "ODR print error: %s",
 387                        odr_errmsg(odr_geterror(assoc->print)));
 388                 odr_reset(assoc->print);
 389             }
 390             request_enq(&assoc->incoming, req);
 391         }
 392
 393         /* can we do something yet? */
 394         req = request_head(&assoc->incoming);
 395         if (req->state == REQUEST_IDLE)
 396         {
 397             request_deq(&assoc->incoming);
 398             process_gdu_request(assoc, req);
 399         }
 400     }
 401     if (event & assoc->cs_put_mask)
 402     {
 403         request *req = request_head(&assoc->outgoing);
 404
 405         assoc->cs_put_mask = 0;
 406         yaz_log(YLOG_DEBUG, "ir_session (output)");
 407         req->state = REQUEST_PENDING;
 408         switch (res = cs_put(conn, req->response, req->len_response))
 409         {
 410         case -1:
 411             yaz_log(log_session, "Connection closed by client");
 412             cs_close(conn);
 413             destroy_association(assoc);
 414             iochan_destroy(h);
 415             break;
 416         case 0: /* all sent - release the request structure */
 417             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 418 #if 0
 419             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 420                     req->response);
 421 #endif
 422             nmem_destroy(req->request_mem);
 423             request_deq(&assoc->outgoing);
 424             request_release(req);
 425             if (!request_head(&assoc->outgoing))
 426             {   /* restore mask for cs_get operation ... */
 427                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 428                 iochan_setflag(h, assoc->cs_get_mask);
 429                 if (assoc->state == ASSOC_DEAD)
 430                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 431             }
 432             else
 433             {
 434                 assoc->cs_put_mask = EVENT_OUTPUT;
 435             }
 436             break;
 437         default:
 438             if (conn->io_pending & CS_WANT_WRITE)
 439                 assoc->cs_put_mask |= EVENT_OUTPUT;
 440             if (conn->io_pending & CS_WANT_READ)
 441                 assoc->cs_put_mask |= EVENT_INPUT;
 442             iochan_setflag(h, assoc->cs_put_mask);
 443         }
 444     }
 445     if (event & EVENT_EXCEPT)
 446     {
 447         yaz_log(YLOG_WARN, "ir_session (exception)");
 448         cs_close(conn);
 449         destroy_association(assoc);
 450         iochan_destroy(h);
 451     }
 452 }
 453
 454 static int process_z_request(association *assoc, request *req, char **msg);
 455
 456
 457 static void assoc_init_reset(association *assoc)
 458 {
 459     xfree (assoc->init);
 460     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 461
 462     assoc->init->stream = assoc->encode;
 463     assoc->init->print = assoc->print;
 464     assoc->init->auth = 0;
 465     assoc->init->referenceId = 0;
 466     assoc->init->implementation_version = 0;
 467     assoc->init->implementation_id = 0;
 468     assoc->init->implementation_name = 0;
 469     assoc->init->bend_sort = NULL;
 470     assoc->init->bend_search = NULL;
 471     assoc->init->bend_present = NULL;
 472     assoc->init->bend_esrequest = NULL;
 473     assoc->init->bend_delete = NULL;
 474     assoc->init->bend_scan = NULL;
 475     assoc->init->bend_segment = NULL;
 476     assoc->init->bend_fetch = NULL;
 477     assoc->init->bend_explain = NULL;
 478     assoc->init->bend_srw_scan = NULL;
 479     assoc->init->bend_srw_update = NULL;
 480
 481     assoc->init->charneg_request = NULL;
 482     assoc->init->charneg_response = NULL;
 483
 484     assoc->init->decode = assoc->decode;
 485     assoc->init->peer_name =
 486         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 487
 488     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 489 }
 490
 491 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num)
 492 {
 493     statserv_options_block *cb = statserv_getcontrol();
 494     if (!assoc->init)
 495     {
 496         const char *encoding = "UTF-8";
 497         Z_External *ce;
 498         bend_initresult *binitres;
 499
 500         yaz_log(YLOG_LOG, "srw_bend_init config=%s", cb->configname);
 501         assoc_init_reset(assoc);
 502
 503         assoc->maximumRecordSize = 3000000;
 504         assoc->preferredMessageSize = 3000000;
 505 #if 1
 506         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 507         assoc->init->charneg_request = ce->u.charNeg3;
 508 #endif
 509         assoc->backend = 0;
 510         if (!(binitres = (*cb->bend_init)(assoc->init)))
 511         {
 512             assoc->state = ASSOC_DEAD;
 513             yaz_add_srw_diagnostic(assoc->encode, d, num,
 514                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 515             return 0;
 516         }
 517         assoc->backend = binitres->handle;
 518         if (binitres->errcode)
 519         {
 520             assoc->state = ASSOC_DEAD;
 521             yaz_add_srw_diagnostic(assoc->encode, d, num, binitres->errcode,
 522                                    binitres->errstring);
 523             return 0;
 524         }
 525         return 1;
 526     }
 527     return 1;
 528 }
 529
 530 static int srw_bend_fetch(association *assoc, int pos,
 531                           Z_SRW_searchRetrieveRequest *srw_req,
 532                           Z_SRW_record *record)
 533 {
 534     bend_fetch_rr rr;
 535     ODR o = assoc->encode;
 536
 537     rr.setname = "default";
 538     rr.number = pos;
 539     rr.referenceId = 0;
 540     rr.request_format = VAL_TEXT_XML;
 541     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 542                                                    CLASS_TRANSYN,
 543                                                    VAL_TEXT_XML);
 544     rr.comp = (Z_RecordComposition *)
 545             odr_malloc(assoc->decode, sizeof(*rr.comp));
 546     rr.comp->which = Z_RecordComp_complex;
 547     rr.comp->u.complex = (Z_CompSpec *)
 548             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 549     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 550         odr_malloc(assoc->encode, sizeof(bool_t));
 551     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 552     rr.comp->u.complex->num_dbSpecific = 0;
 553     rr.comp->u.complex->dbSpecific = 0;
 554     rr.comp->u.complex->num_recordSyntax = 0;
 555     rr.comp->u.complex->recordSyntax = 0;
 556
 557     rr.comp->u.complex->generic = (Z_Specification *)
 558             odr_malloc(assoc->decode, sizeof(Z_Specification));
 559
 560     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 561     rr.comp->u.complex->generic->which = Z_Schema_uri;
 562     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 563
 564     /* ESN = recordSchema if recordSchema is present */
 565     rr.comp->u.complex->generic->elementSpec = 0;
 566     if (srw_req->recordSchema)
 567     {
 568         rr.comp->u.complex->generic->elementSpec =
 569             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 570         rr.comp->u.complex->generic->elementSpec->which =
 571             Z_ElementSpec_elementSetName;
 572         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 573             srw_req->recordSchema;
 574     }
 575
 576     rr.stream = assoc->encode;
 577     rr.print = assoc->print;
 578
 579     rr.basename = 0;
 580     rr.len = 0;
 581     rr.record = 0;
 582     rr.last_in_set = 0;
 583     rr.output_format = VAL_TEXT_XML;
 584     rr.output_format_raw = 0;
 585     rr.errcode = 0;
 586     rr.errstring = 0;
 587     rr.surrogate_flag = 0;
 588     rr.schema = srw_req->recordSchema;
 589
 590     if (!assoc->init->bend_fetch)
 591         return 1;
 592
 593     (*assoc->init->bend_fetch)(assoc->backend, &rr);
 594
 595     if (rr.errcode && rr.surrogate_flag)
 596     {
 597         int code = yaz_diag_bib1_to_srw(rr.errcode);
 598         const char *message = yaz_diag_srw_str(code);
 599         int len = 200;
 600         if (message)
 601             len += strlen(message);
 602         if (rr.errstring)
 603             len += strlen(rr.errstring);
 604
 605         record->recordData_buf = odr_malloc(o, len);
 606
 607         sprintf(record->recordData_buf, "<diagnostic "
 608                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 609                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 610         if (rr.errstring)
 611             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 612                     " <details>%s</details>\n", rr.errstring);
 613         if (message)
 614             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 615                     " <message>%s</message>\n", message);
 616         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 617                 "</diagnostic>\n");
 618         record->recordData_len = strlen(record->recordData_buf);
 619         record->recordPosition = odr_intdup(o, pos);
 620         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 621         return 0;
 622     }
 623     else if (rr.len >= 0)
 624     {
 625         record->recordData_buf = rr.record;
 626         record->recordData_len = rr.len;
 627         record->recordPosition = odr_intdup(o, pos);
 628         if (rr.schema)
 629             record->recordSchema = odr_strdup(o, rr.schema);
 630         else
 631             record->recordSchema = 0;
 632     }
 633     return rr.errcode;
 634 }
 635
 636 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 637                    Z_Query *query_result)
 638 {
 639     /* have a CQL query and  CQL to PQF transform .. */
 640     CQL_parser cp = cql_parser_create();
 641     int r;
 642     int srw_errcode = 0;
 643     const char *add = 0;
 644     char rpn_buf[512];
 645
 646     r = cql_parser_string(cp, cql);
 647     if (r)
 648     {
 649         /* CQL syntax error */
 650         srw_errcode = 10;
 651     }
 652     if (!r)
 653     {
 654         /* Syntax OK */
 655         r = cql_transform_buf(ct,
 656                               cql_parser_result(cp),
 657                               rpn_buf, sizeof(rpn_buf)-1);
 658         if (r)
 659             srw_errcode  = cql_transform_error(ct, &add);
 660     }
 661     if (!r)
 662     {
 663         /* Syntax & transform OK. */
 664         /* Convert PQF string to Z39.50 to RPN query struct */
 665         YAZ_PQF_Parser pp = yaz_pqf_create();
 666         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 667         if (!rpnquery)
 668         {
 669             size_t off;
 670             const char *pqf_msg;
 671             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 672             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 673                     pqf_msg, code);
 674             srw_errcode = 10;
 675         }
 676         else
 677         {
 678             query_result->which = Z_Query_type_1;
 679             query_result->u.type_1 = rpnquery;
 680         }
 681         yaz_pqf_destroy(pp);
 682     }
 683     cql_parser_destroy(cp);
 684     return srw_errcode;
 685 }
 686
 687 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 688                         Z_AttributesPlusTerm *result)
 689 {
 690     Z_Query query;
 691     Z_RPNQuery *rpn;
 692     int srw_error = cql2pqf(odr, cql, ct, &query);
 693     if (srw_error)
 694         return srw_error;
 695     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 696         return 10; /* bad query type */
 697     rpn = query.u.type_1;
 698     if (!rpn->RPNStructure)
 699         return 10; /* must be structure */
 700     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 701         return 10; /* must be simple */
 702     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 703         return 10; /* must be attributes plus term node .. */
 704     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 705            sizeof(*result));
 706     return 0;
 707 }
 708
 709 static void srw_bend_search(association *assoc, request *req,
 710                             Z_SRW_searchRetrieveRequest *srw_req,
 711                             Z_SRW_searchRetrieveResponse *srw_res,
 712                             int *http_code)
 713 {
 714     int srw_error = 0;
 715     Z_External *ext;
 716
 717     *http_code = 200;
 718     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 719     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics);
 720     if (srw_res->num_diagnostics == 0 && assoc->init)
 721     {
 722         bend_search_rr rr;
 723         rr.setname = "default";
 724         rr.replace_set = 1;
 725         rr.num_bases = 1;
 726         rr.basenames = &srw_req->database;
 727         rr.referenceId = 0;
 728         rr.srw_sortKeys = 0;
 729         rr.srw_setname = 0;
 730         rr.srw_setnameIdleTime = 0;
 731         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 732         rr.query->u.type_1 = 0;
 733
 734         if (srw_req->query_type == Z_SRW_query_type_cql)
 735         {
 736             if (assoc->cql_transform)
 737             {
 738                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 739                                           assoc->cql_transform, rr.query);
 740                 if (srw_errcode)
 741                 {
 742                     yaz_add_srw_diagnostic(assoc->encode,
 743                                            &srw_res->diagnostics,
 744                                            &srw_res->num_diagnostics,
 745                                            srw_errcode, 0);
 746                 }
 747             }
 748             else
 749             {
 750                 /* CQL query to backend. Wrap it - Z39.50 style */
 751                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 752                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 753                                                         "1.2.840.10003.16.2");
 754                 ext->indirect_reference = 0;
 755                 ext->descriptor = 0;
 756                 ext->which = Z_External_CQL;
 757                 ext->u.cql = srw_req->query.cql;
 758
 759                 rr.query->which = Z_Query_type_104;
 760                 rr.query->u.type_104 =  ext;
 761             }
 762         }
 763         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 764         {
 765             Z_RPNQuery *RPNquery;
 766             YAZ_PQF_Parser pqf_parser;
 767
 768             pqf_parser = yaz_pqf_create ();
 769
 770             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 771                                       srw_req->query.pqf);
 772             if (!RPNquery)
 773             {
 774                 const char *pqf_msg;
 775                 size_t off;
 776                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 777                 yaz_log(log_requestdetail, "Parse error %d %s near offset %d",
 778                         code, pqf_msg, off);
 779                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 780             }
 781
 782             rr.query->which = Z_Query_type_1;
 783             rr.query->u.type_1 =  RPNquery;
 784
 785             yaz_pqf_destroy (pqf_parser);
 786         }
 787         else
 788         {
 789             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 790                                    &srw_res->num_diagnostics,
 791                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 792         }
 793         if (rr.query->u.type_1)
 794         {
 795             rr.stream = assoc->encode;
 796             rr.decode = assoc->decode;
 797             rr.print = assoc->print;
 798             rr.request = req;
 799             if ( srw_req->sort.sortKeys )
 800                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 801                                              srw_req->sort.sortKeys );
 802             rr.association = assoc;
 803             rr.fd = 0;
 804             rr.hits = 0;
 805             rr.errcode = 0;
 806             rr.errstring = 0;
 807             rr.search_info = 0;
 808             yaz_log_zquery_level(log_requestdetail,rr.query);
 809
 810             (assoc->init->bend_search)(assoc->backend, &rr);
 811             if (rr.errcode)
 812             {
 813                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 814                 {
 815                     *http_code = 404;
 816                 }
 817                 else
 818                 {
 819                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 820                     yaz_add_srw_diagnostic(assoc->encode,
 821                                            &srw_res->diagnostics,
 822                                            &srw_res->num_diagnostics,
 823                                            srw_error, rr.errstring);
 824                 }
 825             }
 826             else
 827             {
 828                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 829                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 830
 831                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 832                         start, number, rr.hits);
 833
 834                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 835                 if (rr.srw_setname)
 836                 {
 837                     srw_res->resultSetId =
 838                         odr_strdup(assoc->encode, rr.srw_setname );
 839                     srw_res->resultSetIdleTime =
 840                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 841                 }
 842                 if (number > 0)
 843                 {
 844                     int i;
 845
 846                     if (start > rr.hits)
 847                     {
 848                         yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 849                                                &srw_res->num_diagnostics,
 850                                                YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
 851                     }
 852                     else
 853                     {
 854                         int j = 0;
 855                         int packing = Z_SRW_recordPacking_string;
 856                         if (start + number > rr.hits)
 857                             number = rr.hits - start + 1;
 858                         if (srw_req->recordPacking){
 859                             if (!strcmp(srw_req->recordPacking, "xml"))
 860                                 packing = Z_SRW_recordPacking_XML;
 861                             if (!strcmp(srw_req->recordPacking, "url"))
 862                                 packing = Z_SRW_recordPacking_URL;
 863                         }
 864                         srw_res->records = (Z_SRW_record *)
 865                             odr_malloc(assoc->encode,
 866                                        number * sizeof(*srw_res->records));
 867
 868                         srw_res->extra_records = (Z_SRW_extra_record **)
 869                             odr_malloc(assoc->encode,
 870                                        number*sizeof(*srw_res->extra_records));
 871
 872                         for (i = 0; i<number; i++)
 873                         {
 874                             int errcode;
 875
 876                             srw_res->records[j].recordPacking = packing;
 877                             srw_res->records[j].recordData_buf = 0;
 878                             srw_res->extra_records[j] = 0;
 879                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
 880                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
 881                                                      srw_res->records + j);
 882                             if (errcode)
 883                             {
 884                                 yaz_add_srw_diagnostic(assoc->encode,
 885                                                        &srw_res->diagnostics,
 886                                                        &srw_res->num_diagnostics,
 887                                                        yaz_diag_bib1_to_srw (errcode),
 888                                                        rr.errstring);
 889
 890                                 break;
 891                             }
 892                             if (srw_res->records[j].recordData_buf)
 893                                 j++;
 894                         }
 895                         srw_res->num_records = j;
 896                         if (!j)
 897                             srw_res->records = 0;
 898                     }
 899                 }
 900             }
 901         }
 902     }
 903     if (log_request)
 904     {
 905         const char *querystr = "?";
 906         const char *querytype = "?";
 907         WRBUF wr = wrbuf_alloc();
 908
 909         switch (srw_req->query_type)
 910         {
 911         case Z_SRW_query_type_cql:
 912             querytype = "CQL";
 913             querystr = srw_req->query.cql;
 914             break;
 915         case Z_SRW_query_type_pqf:
 916             querytype = "PQF";
 917             querystr = srw_req->query.pqf;
 918             break;
 919         }
 920         wrbuf_printf(wr, "SRWSearch ");
 921         if (srw_res->num_diagnostics)
 922             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
 923         else if (*http_code != 200)
 924             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
 925         else if (srw_res->numberOfRecords)
 926         {
 927             wrbuf_printf(wr, "OK %d",
 928                          (srw_res->numberOfRecords ?
 929                           *srw_res->numberOfRecords : 0));
 930         }
 931         wrbuf_printf(wr, " %s %d+%d",
 932                      (srw_res->resultSetId ?
 933                       srw_res->resultSetId : "-"),
 934                      (srw_req->startRecord ? *srw_req->startRecord : 1),
 935                      srw_res->num_records);
 936         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
 937         wrbuf_free(wr, 1);
 938     }
 939 }
 940
 941 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
 942 {
 943 #if HAVE_XML2
 944     xmlNodePtr ptr = rr->server_node_ptr;
 945     if (!ptr)
 946         return 0;
 947     for (ptr = ptr->children; ptr; ptr = ptr->next)
 948     {
 949         if (ptr->type != XML_ELEMENT_NODE)
 950             continue;
 951         if (!strcmp((const char *) ptr->name, "explain"))
 952         {
 953             int len;
 954             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
 955             xmlChar *buf_out;
 956             char *content;
 957
 958             ptr = xmlCopyNode(ptr, 1);
 959
 960             xmlDocSetRootElement(doc, ptr);
 961
 962             xmlDocDumpMemory(doc, &buf_out, &len);
 963             content = (char*) odr_malloc(rr->stream, 1+len);
 964             memcpy(content, buf_out, len);
 965             content[len] = '\0';
 966
 967             xmlFree(buf_out);
 968             xmlFreeDoc(doc);
 969             rr->explain_buf = content;
 970             return 0;
 971         }
 972     }
 973 #endif
 974     return 0;
 975 }
 976
 977 static void srw_bend_explain(association *assoc, request *req,
 978                              Z_SRW_explainRequest *srw_req,
 979                              Z_SRW_explainResponse *srw_res,
 980                              int *http_code)
 981 {
 982     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
 983     *http_code = 404;
 984     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics);
 985     if (assoc->init)
 986     {
 987         bend_explain_rr rr;
 988
 989         rr.stream = assoc->encode;
 990         rr.decode = assoc->decode;
 991         rr.print = assoc->print;
 992         rr.explain_buf = 0;
 993         rr.database = srw_req->database;
 994         rr.server_node_ptr = assoc->server_node_ptr;
 995         rr.schema = "http://explain.z3950.org/dtd/2.0/";
 996         if (assoc->init->bend_explain)
 997             (*assoc->init->bend_explain)(assoc->backend, &rr);
 998         else
 999             srw_bend_explain_default(assoc->backend, &rr);
1000
1001         if (rr.explain_buf)
1002         {
1003             int packing = Z_SRW_recordPacking_string;
1004             if (srw_req->recordPacking)
1005             {
1006                 if (!strcmp(srw_req->recordPacking, "xml"))
1007                     packing = Z_SRW_recordPacking_XML;
1008                 else if (!strcmp(srw_req->recordPacking, "url"))
1009                     packing = Z_SRW_recordPacking_URL;
1010             }
1011             srw_res->record.recordSchema = rr.schema;
1012             srw_res->record.recordPacking = packing;
1013             srw_res->record.recordData_buf = rr.explain_buf;
1014             srw_res->record.recordData_len = strlen(rr.explain_buf);
1015             srw_res->record.recordPosition = 0;
1016             *http_code = 200;
1017         }
1018     }
1019 }
1020
1021 static void srw_bend_scan(association *assoc, request *req,
1022                           Z_SRW_scanRequest *srw_req,
1023                           Z_SRW_scanResponse *srw_res,
1024                           int *http_code)
1025 {
1026     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1027
1028     *http_code = 200;
1029     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics);
1030     if (srw_res->num_diagnostics == 0 && assoc->init)
1031     {
1032         struct scan_entry *save_entries;
1033
1034         bend_scan_rr *bsrr = (bend_scan_rr *)
1035             odr_malloc (assoc->encode, sizeof(*bsrr));
1036         bsrr->num_bases = 1;
1037         bsrr->basenames = &srw_req->database;
1038
1039         bsrr->num_entries = srw_req->maximumTerms ?
1040             *srw_req->maximumTerms : 10;
1041         bsrr->term_position = srw_req->responsePosition ?
1042             *srw_req->responsePosition : 1;
1043
1044         bsrr->errcode = 0;
1045         bsrr->errstring = 0;
1046         bsrr->referenceId = 0;
1047         bsrr->stream = assoc->encode;
1048         bsrr->print = assoc->print;
1049         bsrr->step_size = odr_intdup(assoc->decode, 0);
1050         bsrr->entries = 0;
1051
1052         if (bsrr->num_entries > 0)
1053         {
1054             int i;
1055             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1056                                        bsrr->num_entries);
1057             for (i = 0; i<bsrr->num_entries; i++)
1058             {
1059                 bsrr->entries[i].term = 0;
1060                 bsrr->entries[i].occurrences = 0;
1061                 bsrr->entries[i].errcode = 0;
1062                 bsrr->entries[i].errstring = 0;
1063                 bsrr->entries[i].display_term = 0;
1064             }
1065         }
1066         save_entries = bsrr->entries;  /* save it so we can compare later */
1067
1068         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1069             assoc->init->bend_scan)
1070         {
1071             Odr_oid *scan_attributeSet = 0;
1072             oident *attset;
1073             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1074
1075             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1076                                       &scan_attributeSet,
1077                                       srw_req->scanClause.pqf);
1078             if (scan_attributeSet &&
1079                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1080                 (attset->oclass == CLASS_ATTSET ||
1081                  attset->oclass == CLASS_GENERAL))
1082                 bsrr->attributeset = attset->value;
1083             else
1084                 bsrr->attributeset = VAL_NONE;
1085             yaz_pqf_destroy(pqf_parser);
1086             bsrr->scanClause = 0;
1087             ((int (*)(void *, bend_scan_rr *))
1088              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1089         }
1090         else if (srw_req->query_type == Z_SRW_query_type_cql
1091                  && assoc->init->bend_scan && assoc->cql_transform)
1092         {
1093             int srw_error;
1094             bsrr->scanClause = 0;
1095             bsrr->attributeset = VAL_NONE;
1096             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1097             srw_error = cql2pqf_scan(assoc->encode,
1098                                      srw_req->scanClause.cql,
1099                                      assoc->cql_transform,
1100                                      bsrr->term);
1101             if (srw_error)
1102                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1103                                        &srw_res->num_diagnostics,
1104                                        srw_error, 0);
1105             else
1106             {
1107                 ((int (*)(void *, bend_scan_rr *))
1108                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1109             }
1110         }
1111         else if (srw_req->query_type == Z_SRW_query_type_cql
1112                  && assoc->init->bend_srw_scan)
1113         {
1114             bsrr->term = 0;
1115             bsrr->attributeset = VAL_NONE;
1116             bsrr->scanClause = srw_req->scanClause.cql;
1117             ((int (*)(void *, bend_scan_rr *))
1118              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1119         }
1120         else
1121         {
1122             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1123                                    &srw_res->num_diagnostics,
1124                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1125         }
1126         if (bsrr->errcode)
1127         {
1128             int srw_error;
1129             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1130             {
1131                 *http_code = 404;
1132                 return;
1133             }
1134             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1135
1136             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1137                                    &srw_res->num_diagnostics,
1138                                    srw_error, bsrr->errstring);
1139         }
1140         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1141         {
1142             int i;
1143             srw_res->terms = (Z_SRW_scanTerm*)
1144                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1145                            bsrr->num_entries);
1146
1147             srw_res->num_terms =  bsrr->num_entries;
1148             for (i = 0; i<bsrr->num_entries; i++)
1149             {
1150                 Z_SRW_scanTerm *t = srw_res->terms + i;
1151                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1152                 t->numberOfRecords =
1153                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1154                 t->displayTerm = 0;
1155                 if (save_entries == bsrr->entries &&
1156                     bsrr->entries[i].display_term)
1157                 {
1158                     /* the entries was _not_ set by the handler. So it's
1159                        safe to test for new member display_term. It is
1160                        NULL'ed by us.
1161                     */
1162                     t->displayTerm = odr_strdup(assoc->encode,
1163                                                 bsrr->entries[i].display_term);
1164                 }
1165                 t->whereInList = 0;
1166             }
1167         }
1168     }
1169     if (log_request)
1170     {
1171         WRBUF wr = wrbuf_alloc();
1172         const char *querytype = 0;
1173         const char *querystr = 0;
1174
1175         switch(srw_req->query_type)
1176         {
1177         case Z_SRW_query_type_pqf:
1178             querytype = "PQF";
1179             querystr = srw_req->scanClause.pqf;
1180             break;
1181         case Z_SRW_query_type_cql:
1182             querytype = "CQL";
1183             querystr = srw_req->scanClause.cql;
1184             break;
1185         default:
1186             querytype = "Unknown";
1187             querystr = "";
1188         }
1189         wrbuf_printf(wr, "SRWScan %d+%d",
1190                      (srw_req->responsePosition ?
1191                       *srw_req->responsePosition : 1),
1192                      (srw_req->maximumTerms ?
1193                       *srw_req->maximumTerms : 1));
1194         if (srw_res->num_diagnostics)
1195             wrbuf_printf(wr, " ERROR %s", srw_res->diagnostics[0].uri);
1196         else
1197             wrbuf_printf(wr, " OK -");
1198         wrbuf_printf(wr, " %s: %s", querytype, querystr);
1199         yaz_log(log_request, "%s", wrbuf_buf(wr) );
1200         wrbuf_free(wr, 1);
1201     }
1202
1203 }
1204
1205 static void srw_bend_update(association *assoc, request *req,
1206                             Z_SRW_updateRequest *srw_req,
1207                             Z_SRW_updateResponse *srw_res,
1208                             int *http_code)
1209 {
1210     yaz_log(YLOG_DEBUG, "Got SRW UpdateRequest");
1211     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1212     *http_code = 404;
1213     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics);
1214     if (assoc->init)
1215     {
1216         bend_update_rr rr;
1217
1218         rr.stream = assoc->encode;
1219         rr.print = assoc->print;
1220         rr.num_bases = 1;
1221         rr.basenames = &srw_req->database;
1222         rr.operation = srw_req->operation;
1223         rr.operation_status = "failed";
1224         rr.record_id = 0;
1225         rr.record_version = 0;
1226         rr.record_checksum = 0;
1227         rr.record_old_version = 0;
1228         rr.record_packing = "xml";
1229         rr.record_schema = 0;
1230         rr.record_data = 0;
1231         rr.request_extra_record = 0;
1232         rr.response_extra_record = 0;
1233         rr.extra_request_data = 0;
1234         rr.extra_response_data = 0;
1235         rr.errcode = 0;
1236         rr.errstring = 0;
1237
1238         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1239         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1240         if ( !strcmp( rr.operation, "delete" ) ){
1241             if ( !srw_req->recordId ){
1242                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1243                                        &srw_res->num_diagnostics,
1244                                        7, "recordId" );
1245             }
1246             else {
1247                 rr.record_id = srw_req->recordId;
1248             }
1249             if (  !srw_req->recordVersion ){
1250                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1251                                        &srw_res->num_diagnostics,
1252                                        7, "recordVersion" );
1253             }
1254             else {
1255                 rr.record_version = odr_strdup( assoc->encode,
1256                                                 srw_req->recordVersion );
1257
1258             }
1259             if ( srw_req->recordOldVersion ){
1260                 rr.record_old_version = odr_strdup(assoc->encode,
1261                                                    srw_req->recordOldVersion );
1262             }
1263             if ( srw_req->extraRequestData ){
1264                 rr.extra_request_data = odr_strdup(assoc->encode,
1265                                                    srw_req->extraRequestData );
1266             }
1267         }
1268         else if ( !strcmp( rr.operation, "replace" ) ){
1269             if ( !srw_req->recordId ){
1270                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1271                                        &srw_res->num_diagnostics,
1272                                        7, "recordId" );
1273             }
1274             else {
1275                 rr.record_id = srw_req->recordId;
1276             }
1277             if ( srw_req->record.recordSchema == 0 ){
1278                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1279                                        &srw_res->num_diagnostics,
1280                                        7, "recordSchema" );
1281             }
1282             else {
1283                 rr.record_schema = odr_strdup(assoc->encode,
1284                                               srw_req->record.recordSchema );
1285             }
1286             switch (srw_req->record.recordPacking)
1287             {
1288             case Z_SRW_recordPacking_string:
1289                 rr.record_packing = "string";
1290                 break;
1291             case Z_SRW_recordPacking_XML:
1292                 rr.record_packing = "xml";
1293                 break;
1294             case Z_SRW_recordPacking_URL:
1295                 rr.record_packing = "url";
1296                 break;
1297             }
1298             if ( srw_req->record.recordData_len ){
1299                 rr.record_data = odr_strdupn(assoc->encode,
1300                                              srw_req->record.recordData_buf,
1301                                              srw_req->record.recordData_len );
1302                 rr.request_extra_record = srw_req->extra_record;
1303             }
1304             else {
1305                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1306                                        &srw_res->num_diagnostics,
1307                                        7, "recordData" );
1308             }
1309             if (srw_req->extraRequestData)
1310                 rr.extra_request_data = odr_strdup(assoc->encode,
1311                                                    srw_req->extraRequestData );
1312         }
1313         else if ( !strcmp( rr.operation, "insert" ) )
1314         {
1315             if ( srw_req->record.recordSchema == 0 ){
1316                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1317                                        &srw_res->num_diagnostics,
1318                                        7, "recordSchema" );
1319             }
1320             else {
1321                 rr.record_schema = odr_strdup(assoc->encode,
1322                                               srw_req->record.recordSchema);
1323             }
1324             switch (srw_req->record.recordPacking)
1325             {
1326             case Z_SRW_recordPacking_string:
1327                 rr.record_packing = "string";
1328                 break;
1329             case Z_SRW_recordPacking_XML:
1330                 rr.record_packing = "xml";
1331                 break;
1332             case Z_SRW_recordPacking_URL:
1333                 rr.record_packing = "url";
1334                 break;
1335             }
1336
1337             if (srw_req->record.recordData_len)
1338             {
1339                 rr.record_data = odr_strdupn(assoc->encode,
1340                                              srw_req->record.recordData_buf,
1341                                              srw_req->record.recordData_len );
1342                 rr.request_extra_record = srw_req->extra_record;
1343             }
1344             else
1345                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1346                                        &srw_res->num_diagnostics,
1347                                        7, "recordData" );
1348             if ( srw_req->extraRequestData )
1349                 rr.extra_request_data = odr_strdup(assoc->encode,
1350                                                    srw_req->extraRequestData );
1351         }
1352         if (srw_res->num_diagnostics == 0)
1353         {
1354             if ( assoc->init->bend_srw_update)
1355                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1356             else {
1357                 yaz_log( YLOG_WARN, "Got No Update function!");
1358                 return;
1359             }
1360         }
1361         if (rr.errcode)
1362             yaz_add_srw_diagnostic(assoc->encode,
1363                                    &srw_res->diagnostics,
1364                                    &srw_res->num_diagnostics,
1365                                    rr.errcode, rr.errstring);
1366         srw_res->recordId = rr.record_id;
1367         srw_res->operationStatus = rr.operation_status;
1368         srw_res->recordVersion = rr.record_version;
1369         srw_res->recordChecksum = rr.record_checksum;
1370         srw_res->extraResponseData = rr.extra_response_data;
1371         srw_res->record.recordPosition = 0;
1372         if (srw_res->num_diagnostics == 0 && rr.record_data)
1373         {
1374             srw_res->record.recordSchema = rr.record_schema;
1375             srw_res->record.recordPacking = srw_req->record.recordPacking;
1376             srw_res->record.recordData_buf = rr.record_data;
1377             srw_res->record.recordData_len = strlen(rr.record_data);
1378             srw_res->extra_record = rr.response_extra_record;
1379
1380         }
1381         else
1382             srw_res->record.recordData_len = 0;
1383         *http_code = 200;
1384     }
1385 }
1386
1387 /* check if path is OK (1); BAD (0) */
1388 static int check_path(const char *path)
1389 {
1390     if (*path != '/')
1391         return 0;
1392     if (strstr(path, ".."))
1393         return 0;
1394     return 1;
1395 }
1396
1397 static char *read_file(const char *fname, ODR o, int *sz)
1398 {
1399     char *buf;
1400     FILE *inf = fopen(fname, "rb");
1401     if (!inf)
1402         return 0;
1403
1404     fseek(inf, 0L, SEEK_END);
1405     *sz = ftell(inf);
1406     rewind(inf);
1407     buf = odr_malloc(o, *sz);
1408     fread(buf, 1, *sz, inf);
1409     fclose(inf);
1410     return buf;
1411 }
1412
1413 static void process_http_request(association *assoc, request *req)
1414 {
1415     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1416     ODR o = assoc->encode;
1417     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1418     Z_SRW_PDU *sr = 0;
1419     Z_SOAP *soap_package = 0;
1420     Z_GDU *p = 0;
1421     char *charset = 0;
1422     Z_HTTP_Response *hres = 0;
1423     int keepalive = 1;
1424     const char *stylesheet = 0; /* for now .. set later */
1425     Z_SRW_diagnostic *diagnostic = 0;
1426     int num_diagnostic = 0;
1427     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1428
1429     if (!control_association(assoc, host, 0))
1430     {
1431         p = z_get_HTTP_Response(o, 404);
1432         r = 1;
1433     }
1434     if (r == 2 && assoc->docpath && hreq->path[0] == '/'
1435         &&
1436         /* check if path is a proper prefix of documentroot */
1437         strncmp(hreq->path+1, assoc->docpath, strlen(assoc->docpath))
1438         == 0)
1439     {
1440         if (!check_path(hreq->path))
1441         {
1442             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1443             p = z_get_HTTP_Response(o, 404);
1444         }
1445         else
1446         {
1447             int content_size = 0;
1448             char *content_buf = read_file(hreq->path+1, o, &content_size);
1449             if (!content_buf)
1450             {
1451                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1452                 p = z_get_HTTP_Response(o, 404);
1453             }
1454             else
1455             {
1456                 const char *ctype = 0;
1457                 yaz_mime_types types = yaz_mime_types_create();
1458
1459                 yaz_mime_types_add(types, "xsl", "application/xml");
1460                 yaz_mime_types_add(types, "xml", "application/xml");
1461                 yaz_mime_types_add(types, "css", "text/css");
1462                 yaz_mime_types_add(types, "html", "text/html");
1463                 yaz_mime_types_add(types, "htm", "text/html");
1464                 yaz_mime_types_add(types, "txt", "text/plain");
1465
1466                 yaz_mime_types_add(types, "gif", "image/gif");
1467                 yaz_mime_types_add(types, "png", "image/png");
1468                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1469                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1470
1471                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1472                 if (!ctype)
1473                 {
1474                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1475                     p = z_get_HTTP_Response(o, 404);
1476                 }
1477                 else
1478                 {
1479                     p = z_get_HTTP_Response(o, 200);
1480                     hres = p->u.HTTP_Response;
1481                     hres->content_buf = content_buf;
1482                     hres->content_len = content_size;
1483                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1484                 }
1485                 yaz_mime_types_destroy(types);
1486             }
1487         }
1488         r = 1;
1489     }
1490
1491     if (r == 2)
1492     {
1493         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1494         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1495     }
1496     if (r == 2)  /* not taken */
1497     {
1498         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1499                            &diagnostic, &num_diagnostic);
1500         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1501     }
1502     if (r == 0)  /* decode SRW/SRU OK .. */
1503     {
1504         int http_code = 200;
1505         if (sr->which == Z_SRW_searchRetrieve_request)
1506         {
1507             Z_SRW_PDU *res =
1508                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1509
1510             stylesheet = sr->u.request->stylesheet;
1511             if (num_diagnostic)
1512             {
1513                 res->u.response->diagnostics = diagnostic;
1514                 res->u.response->num_diagnostics = num_diagnostic;
1515             }
1516             else
1517             {
1518                 srw_bend_search(assoc, req, sr->u.request, res->u.response,
1519                                 &http_code);
1520             }
1521             if (http_code == 200)
1522                 soap_package->u.generic->p = res;
1523         }
1524         else if (sr->which == Z_SRW_explain_request)
1525         {
1526             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1527             stylesheet = sr->u.explain_request->stylesheet;
1528             if (num_diagnostic)
1529             {
1530                 res->u.explain_response->diagnostics = diagnostic;
1531                 res->u.explain_response->num_diagnostics = num_diagnostic;
1532             }
1533             srw_bend_explain(assoc, req, sr->u.explain_request,
1534                              res->u.explain_response, &http_code);
1535             if (http_code == 200)
1536                 soap_package->u.generic->p = res;
1537         }
1538         else if (sr->which == Z_SRW_scan_request)
1539         {
1540             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1541             stylesheet = sr->u.scan_request->stylesheet;
1542             if (num_diagnostic)
1543             {
1544                 res->u.scan_response->diagnostics = diagnostic;
1545                 res->u.scan_response->num_diagnostics = num_diagnostic;
1546             }
1547             srw_bend_scan(assoc, req, sr->u.scan_request,
1548                           res->u.scan_response, &http_code);
1549             if (http_code == 200)
1550                 soap_package->u.generic->p = res;
1551         }
1552         else if (sr->which == Z_SRW_update_request)
1553         {
1554             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1555             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1556             if (num_diagnostic)
1557             {
1558                 res->u.update_response->diagnostics = diagnostic;
1559                 res->u.update_response->num_diagnostics = num_diagnostic;
1560             }
1561             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1562             srw_bend_update(assoc, req, sr->u.update_request,
1563                             res->u.update_response, &http_code);
1564             if (http_code == 200)
1565                 soap_package->u.generic->p = res;
1566         }
1567         else
1568         {
1569             yaz_log(log_request, "SOAP ERROR");
1570             /* FIXME - what error, what query */
1571             http_code = 500;
1572             z_soap_error(assoc->encode, soap_package,
1573                          "SOAP-ENV:Client", "Bad method", 0);
1574         }
1575         if (http_code == 200 || http_code == 500)
1576         {
1577             static Z_SOAP_Handler soap_handlers[4] = {
1578 #if HAVE_XML2
1579                 {"http://www.loc.gov/zing/srw/", 0,
1580                  (Z_SOAP_fun) yaz_srw_codec},
1581                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1582                  (Z_SOAP_fun) yaz_srw_codec},
1583                 {"http://www.loc.gov/zing/srw/update/", 0,
1584                  (Z_SOAP_fun) yaz_ucp_codec},
1585 #endif
1586                 {0, 0, 0}
1587             };
1588             char ctype[60];
1589             int ret;
1590             p = z_get_HTTP_Response(o, 200);
1591             hres = p->u.HTTP_Response;
1592
1593             if (!stylesheet)
1594                 stylesheet = assoc->stylesheet;
1595
1596             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1597                                        &hres->content_buf, &hres->content_len,
1598                                        soap_handlers, charset, stylesheet);
1599             hres->code = http_code;
1600
1601             strcpy(ctype, "text/xml");
1602             if (charset)
1603             {
1604                 strcat(ctype, "; charset=");
1605                 strcat(ctype, charset);
1606             }
1607             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1608         }
1609         else
1610             p = z_get_HTTP_Response(o, http_code);
1611     }
1612
1613     if (p == 0)
1614         p = z_get_HTTP_Response(o, 500);
1615     hres = p->u.HTTP_Response;
1616     if (!strcmp(hreq->version, "1.0"))
1617     {
1618         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1619         if (v && !strcmp(v, "Keep-Alive"))
1620             keepalive = 1;
1621         else
1622             keepalive = 0;
1623         hres->version = "1.0";
1624     }
1625     else
1626     {
1627         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1628         if (v && !strcmp(v, "close"))
1629             keepalive = 0;
1630         else
1631             keepalive = 1;
1632         hres->version = "1.1";
1633     }
1634     if (!keepalive)
1635     {
1636         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1637         assoc->state = ASSOC_DEAD;
1638         assoc->cs_get_mask = 0;
1639     }
1640     else
1641     {
1642         int t;
1643         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1644
1645         if (alive && isdigit(*(const unsigned char *) alive))
1646             t = atoi(alive);
1647         else
1648             t = 15;
1649         if (t < 0 || t > 3600)
1650             t = 3600;
1651         iochan_settimeout(assoc->client_chan,t);
1652         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1653     }
1654     process_gdu_response(assoc, req, p);
1655 }
1656
1657 static void process_gdu_request(association *assoc, request *req)
1658 {
1659     if (req->gdu_request->which == Z_GDU_Z3950)
1660     {
1661         char *msg = 0;
1662         req->apdu_request = req->gdu_request->u.z3950;
1663         if (process_z_request(assoc, req, &msg) < 0)
1664             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1665     }
1666     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1667         process_http_request(assoc, req);
1668     else
1669     {
1670         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1671     }
1672 }
1673
1674 /*
1675  * Initiate request processing.
1676  */
1677 static int process_z_request(association *assoc, request *req, char **msg)
1678 {
1679     int fd = -1;
1680     Z_APDU *res;
1681     int retval;
1682
1683     *msg = "Unknown Error";
1684     assert(req && req->state == REQUEST_IDLE);
1685     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1686     {
1687         *msg = "Missing InitRequest";
1688         return -1;
1689     }
1690     switch (req->apdu_request->which)
1691     {
1692     case Z_APDU_initRequest:
1693         res = process_initRequest(assoc, req); break;
1694     case Z_APDU_searchRequest:
1695         res = process_searchRequest(assoc, req, &fd); break;
1696     case Z_APDU_presentRequest:
1697         res = process_presentRequest(assoc, req, &fd); break;
1698     case Z_APDU_scanRequest:
1699         if (assoc->init->bend_scan)
1700             res = process_scanRequest(assoc, req, &fd);
1701         else
1702         {
1703             *msg = "Cannot handle Scan APDU";
1704             return -1;
1705         }
1706         break;
1707     case Z_APDU_extendedServicesRequest:
1708         if (assoc->init->bend_esrequest)
1709             res = process_ESRequest(assoc, req, &fd);
1710         else
1711         {
1712             *msg = "Cannot handle Extended Services APDU";
1713             return -1;
1714         }
1715         break;
1716     case Z_APDU_sortRequest:
1717         if (assoc->init->bend_sort)
1718             res = process_sortRequest(assoc, req, &fd);
1719         else
1720         {
1721             *msg = "Cannot handle Sort APDU";
1722             return -1;
1723         }
1724         break;
1725     case Z_APDU_close:
1726         process_close(assoc, req);
1727         return 0;
1728     case Z_APDU_deleteResultSetRequest:
1729         if (assoc->init->bend_delete)
1730             res = process_deleteRequest(assoc, req, &fd);
1731         else
1732         {
1733             *msg = "Cannot handle Delete APDU";
1734             return -1;
1735         }
1736         break;
1737     case Z_APDU_segmentRequest:
1738         if (assoc->init->bend_segment)
1739         {
1740             res = process_segmentRequest (assoc, req);
1741         }
1742         else
1743         {
1744             *msg = "Cannot handle Segment APDU";
1745             return -1;
1746         }
1747         break;
1748     case Z_APDU_triggerResourceControlRequest:
1749         return 0;
1750     default:
1751         *msg = "Bad APDU received";
1752         return -1;
1753     }
1754     if (res)
1755     {
1756         yaz_log(YLOG_DEBUG, "  result immediately available");
1757         retval = process_z_response(assoc, req, res);
1758     }
1759     else if (fd < 0)
1760     {
1761         yaz_log(YLOG_DEBUG, "  result unavailble");
1762         retval = 0;
1763     }
1764     else /* no result yet - one will be provided later */
1765     {
1766         IOCHAN chan;
1767
1768         /* Set up an I/O handler for the fd supplied by the backend */
1769
1770         yaz_log(YLOG_DEBUG, "   establishing handler for result");
1771         req->state = REQUEST_PENDING;
1772         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
1773             abort();
1774         iochan_setdata(chan, assoc);
1775         retval = 0;
1776     }
1777     return retval;
1778 }
1779
1780 /*
1781  * Handle message from the backend.
1782  */
1783 void backend_response(IOCHAN i, int event)
1784 {
1785     association *assoc = (association *)iochan_getdata(i);
1786     request *req = request_head(&assoc->incoming);
1787     Z_APDU *res;
1788     int fd;
1789
1790     yaz_log(YLOG_DEBUG, "backend_response");
1791     assert(assoc && req && req->state != REQUEST_IDLE);
1792     /* determine what it is we're waiting for */
1793     switch (req->apdu_request->which)
1794     {
1795         case Z_APDU_searchRequest:
1796             res = response_searchRequest(assoc, req, 0, &fd); break;
1797 #if 0
1798         case Z_APDU_presentRequest:
1799             res = response_presentRequest(assoc, req, 0, &fd); break;
1800         case Z_APDU_scanRequest:
1801             res = response_scanRequest(assoc, req, 0, &fd); break;
1802 #endif
1803         default:
1804             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
1805             abort();
1806     }
1807     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
1808     {
1809         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
1810         do_close(assoc, Z_Close_systemProblem, 0);
1811         iochan_destroy(i);
1812         return;
1813     }
1814     else if (!res) /* no result yet - try again later */
1815     {
1816         yaz_log(YLOG_DEBUG, "   no result yet");
1817         iochan_setfd(i, fd); /* in case fd has changed */
1818     }
1819 }
1820
1821 /*
1822  * Encode response, and transfer the request structure to the outgoing queue.
1823  */
1824 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
1825 {
1826     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
1827
1828     if (assoc->print)
1829     {
1830         if (!z_GDU(assoc->print, &res, 0, 0))
1831             yaz_log(YLOG_WARN, "ODR print error: %s",
1832                 odr_errmsg(odr_geterror(assoc->print)));
1833         odr_reset(assoc->print);
1834     }
1835     if (!z_GDU(assoc->encode, &res, 0, 0))
1836     {
1837         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
1838                 odr_errmsg(odr_geterror(assoc->decode)),
1839                 odr_getelement(assoc->decode));
1840         return -1;
1841     }
1842     req->response = odr_getbuf(assoc->encode, &req->len_response,
1843         &req->size_response);
1844     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
1845     odr_reset(assoc->encode);
1846     req->state = REQUEST_IDLE;
1847     request_enq(&assoc->outgoing, req);
1848     /* turn the work over to the ir_session handler */
1849     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
1850     assoc->cs_put_mask = EVENT_OUTPUT;
1851     /* Is there more work to be done? give that to the input handler too */
1852 #if 1
1853     if (request_head(&assoc->incoming))
1854     {
1855         yaz_log (YLOG_DEBUG, "more work to be done");
1856         iochan_setevent(assoc->client_chan, EVENT_WORK);
1857     }
1858 #endif
1859     return 0;
1860 }
1861
1862 /*
1863  * Encode response, and transfer the request structure to the outgoing queue.
1864  */
1865 static int process_z_response(association *assoc, request *req, Z_APDU *res)
1866 {
1867     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
1868     gres->which = Z_GDU_Z3950;
1869     gres->u.z3950 = res;
1870
1871     return process_gdu_response(assoc, req, gres);
1872 }
1873
1874 static char *get_vhost(Z_OtherInformation *otherInfo)
1875 {
1876     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
1877 }
1878
1879 /*
1880  * Handle init request.
1881  * At the moment, we don't check the options
1882  * anywhere else in the code - we just try not to do anything that would
1883  * break a naive client. We'll toss 'em into the association block when
1884  * we need them there.
1885  */
1886 static Z_APDU *process_initRequest(association *assoc, request *reqb)
1887 {
1888     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
1889     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
1890     Z_InitResponse *resp = apdu->u.initResponse;
1891     bend_initresult *binitres;
1892     char *version;
1893     char options[140];
1894     statserv_options_block *cb = 0;  /* by default no control for backend */
1895
1896     if (control_association(assoc, get_vhost(req->otherInfo), 1))
1897         cb = statserv_getcontrol();  /* got control block for backend */
1898
1899     if (cb && assoc->backend)
1900         (*cb->bend_close)(assoc->backend);
1901
1902     yaz_log(log_requestdetail, "Got initRequest");
1903     if (req->implementationId)
1904         yaz_log(log_requestdetail, "Id:        %s",
1905                 req->implementationId);
1906     if (req->implementationName)
1907         yaz_log(log_requestdetail, "Name:      %s",
1908                 req->implementationName);
1909     if (req->implementationVersion)
1910         yaz_log(log_requestdetail, "Version:   %s",
1911                 req->implementationVersion);
1912
1913     assoc_init_reset(assoc);
1914
1915     assoc->init->auth = req->idAuthentication;
1916     assoc->init->referenceId = req->referenceId;
1917
1918     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
1919     {
1920         Z_CharSetandLanguageNegotiation *negotiation =
1921             yaz_get_charneg_record (req->otherInfo);
1922         if (negotiation &&
1923             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
1924             assoc->init->charneg_request = negotiation;
1925     }
1926
1927     assoc->backend = 0;
1928     if (cb)
1929     {
1930         if (req->implementationVersion)
1931             yaz_log(log_requestdetail, "Config:    %s",
1932                     cb->configname);
1933
1934         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
1935
1936         /* we have a backend control block, so call that init function */
1937         if (!(binitres = (*cb->bend_init)(assoc->init)))
1938         {
1939             yaz_log(YLOG_WARN, "Bad response from backend.");
1940             return 0;
1941         }
1942         assoc->backend = binitres->handle;
1943     }
1944     else
1945     {
1946         /* no backend. return error */
1947         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
1948         binitres->errstring = 0;
1949         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
1950         iochan_settimeout(assoc->client_chan, 10);
1951     }
1952     if ((assoc->init->bend_sort))
1953         yaz_log (YLOG_DEBUG, "Sort handler installed");
1954     if ((assoc->init->bend_search))
1955         yaz_log (YLOG_DEBUG, "Search handler installed");
1956     if ((assoc->init->bend_present))
1957         yaz_log (YLOG_DEBUG, "Present handler installed");
1958     if ((assoc->init->bend_esrequest))
1959         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
1960     if ((assoc->init->bend_delete))
1961         yaz_log (YLOG_DEBUG, "Delete handler installed");
1962     if ((assoc->init->bend_scan))
1963         yaz_log (YLOG_DEBUG, "Scan handler installed");
1964     if ((assoc->init->bend_segment))
1965         yaz_log (YLOG_DEBUG, "Segment handler installed");
1966
1967     resp->referenceId = req->referenceId;
1968     *options = '\0';
1969     /* let's tell the client what we can do */
1970     if (ODR_MASK_GET(req->options, Z_Options_search))
1971     {
1972         ODR_MASK_SET(resp->options, Z_Options_search);
1973         strcat(options, "srch");
1974     }
1975     if (ODR_MASK_GET(req->options, Z_Options_present))
1976     {
1977         ODR_MASK_SET(resp->options, Z_Options_present);
1978         strcat(options, " prst");
1979     }
1980     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
1981         assoc->init->bend_delete)
1982     {
1983         ODR_MASK_SET(resp->options, Z_Options_delSet);
1984         strcat(options, " del");
1985     }
1986     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
1987         assoc->init->bend_esrequest)
1988     {
1989         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
1990         strcat (options, " extendedServices");
1991     }
1992     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
1993     {
1994         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
1995         strcat(options, " namedresults");
1996     }
1997     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
1998     {
1999         ODR_MASK_SET(resp->options, Z_Options_scan);
2000         strcat(options, " scan");
2001     }
2002     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2003     {
2004         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2005         strcat(options, " concurrop");
2006     }
2007     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2008     {
2009         ODR_MASK_SET(resp->options, Z_Options_sort);
2010         strcat(options, " sort");
2011     }
2012
2013     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2014         && assoc->init->charneg_response)
2015     {
2016         Z_OtherInformation **p;
2017         Z_OtherInformationUnit *p0;
2018
2019         yaz_oi_APDU(apdu, &p);
2020
2021         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2022             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2023
2024             p0->which = Z_OtherInfo_externallyDefinedInfo;
2025             p0->information.externallyDefinedInfo =
2026                 assoc->init->charneg_response;
2027         }
2028         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2029         strcat(options, " negotiation");
2030     }
2031
2032     ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2033
2034     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2035     {
2036         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2037         assoc->version = 1; /* 1 & 2 are equivalent */
2038     }
2039     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2040     {
2041         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2042         assoc->version = 2;
2043     }
2044     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2045     {
2046         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2047         assoc->version = 3;
2048     }
2049
2050     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2051     assoc->maximumRecordSize = *req->maximumRecordSize;
2052
2053     if (cb && assoc->maximumRecordSize > cb->maxrecordsize)
2054         assoc->maximumRecordSize = cb->maxrecordsize;
2055     assoc->preferredMessageSize = *req->preferredMessageSize;
2056     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
2057         assoc->preferredMessageSize = assoc->maximumRecordSize;
2058
2059     resp->preferredMessageSize = &assoc->preferredMessageSize;
2060     resp->maximumRecordSize = &assoc->maximumRecordSize;
2061
2062     resp->implementationId = odr_prepend(assoc->encode,
2063                 assoc->init->implementation_id,
2064                 resp->implementationId);
2065
2066     resp->implementationName = odr_prepend(assoc->encode,
2067                 assoc->init->implementation_name,
2068                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2069
2070     version = odr_strdup(assoc->encode, "$Revision: 1.70 $");
2071     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2072         version[strlen(version)-2] = '\0';
2073     resp->implementationVersion = odr_prepend(assoc->encode,
2074                 assoc->init->implementation_version,
2075                 odr_prepend(assoc->encode, &version[11],
2076                             resp->implementationVersion));
2077
2078     if (binitres->errcode)
2079     {
2080         assoc->state = ASSOC_DEAD;
2081         resp->userInformationField =
2082             init_diagnostics(assoc->encode, binitres->errcode,
2083                              binitres->errstring);
2084         *resp->result = 0;
2085     }
2086     if (log_request)
2087     {
2088         if (!req->idAuthentication)
2089             yaz_log(log_request, "Auth none");
2090         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2091         {
2092             const char *open = req->idAuthentication->u.open;
2093             const char *slash = strchr(open, '/');
2094             int len;
2095             if (slash)
2096                 len = slash - open;
2097             else
2098                 len = strlen(open);
2099                 yaz_log(log_request, "Auth open %.*s", len, open);
2100         }
2101         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2102         {
2103             const char *user = req->idAuthentication->u.idPass->userId;
2104             const char *group = req->idAuthentication->u.idPass->groupId;
2105             yaz_log(log_request, "Auth idPass %s %s",
2106                     user ? user : "-", group ? group : "-");
2107         }
2108         else if (req->idAuthentication->which
2109                  == Z_IdAuthentication_anonymous)
2110         {
2111             yaz_log(log_request, "Auth anonymous");
2112         }
2113         else
2114         {
2115             yaz_log(log_request, "Auth other");
2116         }
2117     }
2118     if (log_request)
2119     {
2120         WRBUF wr = wrbuf_alloc();
2121         wrbuf_printf(wr, "Init ");
2122         if (binitres->errcode)
2123             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2124         else
2125             wrbuf_printf(wr, "OK -");
2126         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2127                      (req->implementationId ? req->implementationId :"-"),
2128                      (req->implementationName ?
2129                       req->implementationName : "-"),
2130                      (req->implementationVersion ?
2131                       req->implementationVersion : "-")
2132             );
2133         yaz_log(log_request, "%s", wrbuf_buf(wr));
2134         wrbuf_free(wr, 1);
2135     }
2136     return apdu;
2137 }
2138
2139 /*
2140  * Set the specified `errcode' and `errstring' into a UserInfo-1
2141  * external to be returned to the client in accordance with Z35.90
2142  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2143  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2144  */
2145 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2146 {
2147     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2148         addinfo ? " -- " : "", addinfo ? addinfo : "");
2149     return zget_init_diagnostics(odr, error, addinfo);
2150 }
2151
2152 /*
2153  * nonsurrogate diagnostic record.
2154  */
2155 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2156 {
2157     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2158
2159     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2160             addinfo ? " -- " : "", addinfo ? addinfo : "");
2161
2162     rec->which = Z_Records_NSD;
2163     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2164                                                            error, addinfo);
2165     return rec;
2166 }
2167
2168 /*
2169  * surrogate diagnostic.
2170  */
2171 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2172                                           const char *dbname,
2173                                           int error, const char *addinfo)
2174 {
2175     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2176             addinfo ? " -- " : "", addinfo ? addinfo : "");
2177     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2178 }
2179
2180 static Z_Records *pack_records(association *a, char *setname, int start,
2181                                int *num, Z_RecordComposition *comp,
2182                                int *next, int *pres, oid_value format,
2183                                Z_ReferenceId *referenceId,
2184                                int *oid, int *errcode)
2185 {
2186     int recno, total_length = 0, toget = *num, dumped_records = 0;
2187     Z_Records *records =
2188         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2189     Z_NamePlusRecordList *reclist =
2190         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2191     Z_NamePlusRecord **list =
2192         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2193
2194     records->which = Z_Records_DBOSD;
2195     records->u.databaseOrSurDiagnostics = reclist;
2196     reclist->num_records = 0;
2197     reclist->records = list;
2198     *pres = Z_PresentStatus_success;
2199     *num = 0;
2200     *next = 0;
2201
2202     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2203     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2204         a->maximumRecordSize);
2205     for (recno = start; reclist->num_records < toget; recno++)
2206     {
2207         bend_fetch_rr freq;
2208         Z_NamePlusRecord *thisrec;
2209         int this_length = 0;
2210         /*
2211          * we get the number of bytes allocated on the stream before any
2212          * allocation done by the backend - this should give us a reasonable
2213          * idea of the total size of the data so far.
2214          */
2215         total_length = odr_total(a->encode) - dumped_records;
2216         freq.errcode = 0;
2217         freq.errstring = 0;
2218         freq.basename = 0;
2219         freq.len = 0;
2220         freq.record = 0;
2221         freq.last_in_set = 0;
2222         freq.setname = setname;
2223         freq.surrogate_flag = 0;
2224         freq.number = recno;
2225         freq.comp = comp;
2226         freq.request_format = format;
2227         freq.request_format_raw = oid;
2228         freq.output_format = format;
2229         freq.output_format_raw = 0;
2230         freq.stream = a->encode;
2231         freq.print = a->print;
2232         freq.referenceId = referenceId;
2233         freq.schema = 0;
2234         (*a->init->bend_fetch)(a->backend, &freq);
2235
2236         *next = freq.last_in_set ? 0 : recno + 1;
2237
2238         /* backend should be able to signal whether error is system-wide
2239            or only pertaining to current record */
2240         if (freq.errcode)
2241         {
2242             if (!freq.surrogate_flag)
2243             {
2244                 char s[20];
2245                 *pres = Z_PresentStatus_failure;
2246                 /* for 'present request out of range',
2247                    set addinfo to record position if not set */
2248                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2249                                 freq.errstring == 0)
2250                 {
2251                     sprintf (s, "%d", recno);
2252                     freq.errstring = s;
2253                 }
2254                 if (errcode)
2255                     *errcode = freq.errcode;
2256                 return diagrec(a, freq.errcode, freq.errstring);
2257             }
2258             reclist->records[reclist->num_records] =
2259                 surrogatediagrec(a, freq.basename, freq.errcode,
2260                                  freq.errstring);
2261             reclist->num_records++;
2262             continue;
2263         }
2264         if (freq.record == 0)  /* no error and no record ? */
2265         {
2266             *next = 0;   /* signal end-of-set and stop */
2267             break;
2268         }
2269         if (freq.len >= 0)
2270             this_length = freq.len;
2271         else
2272             this_length = odr_total(a->encode) - total_length - dumped_records;
2273         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2274             this_length, total_length, dumped_records);
2275         if (a->preferredMessageSize > 0 &&
2276                 this_length + total_length > a->preferredMessageSize)
2277         {
2278             /* record is small enough, really */
2279             if (this_length <= a->preferredMessageSize && recno > start)
2280             {
2281                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2282                 *pres = Z_PresentStatus_partial_2;
2283                 break;
2284             }
2285             /* record can only be fetched by itself */
2286             if (this_length < a->maximumRecordSize)
2287             {
2288                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2289                 if (toget > 1)
2290                 {
2291                     yaz_log(YLOG_DEBUG, "  Dropped it");
2292                     reclist->records[reclist->num_records] =
2293                          surrogatediagrec(a, freq.basename, 16, 0);
2294                     reclist->num_records++;
2295                     dumped_records += this_length;
2296                     continue;
2297                 }
2298             }
2299             else /* too big entirely */
2300             {
2301                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2302                         this_length, a->maximumRecordSize);
2303                 reclist->records[reclist->num_records] =
2304                     surrogatediagrec(a, freq.basename, 17, 0);
2305                 reclist->num_records++;
2306                 dumped_records += this_length;
2307                 continue;
2308             }
2309         }
2310
2311         if (!(thisrec = (Z_NamePlusRecord *)
2312               odr_malloc(a->encode, sizeof(*thisrec))))
2313             return 0;
2314         if (freq.basename)
2315             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2316         else
2317             thisrec->databaseName = 0;
2318         thisrec->which = Z_NamePlusRecord_databaseRecord;
2319
2320         if (freq.output_format_raw)
2321         {
2322             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2323             freq.output_format = ident->value;
2324         }
2325         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2326                                                  freq.record, freq.len);
2327         if (!thisrec->u.databaseRecord)
2328             return 0;
2329         reclist->records[reclist->num_records] = thisrec;
2330         reclist->num_records++;
2331     }
2332     *num = reclist->num_records;
2333     return records;
2334 }
2335
2336 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2337     int *fd)
2338 {
2339     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2340     bend_search_rr *bsrr =
2341         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2342
2343     yaz_log(log_requestdetail, "Got SearchRequest.");
2344     bsrr->fd = fd;
2345     bsrr->request = reqb;
2346     bsrr->association = assoc;
2347     bsrr->referenceId = req->referenceId;
2348     save_referenceId (reqb, bsrr->referenceId);
2349     bsrr->srw_sortKeys = 0;
2350     bsrr->srw_setname = 0;
2351     bsrr->srw_setnameIdleTime = 0;
2352
2353     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2354     if (req->databaseNames)
2355     {
2356         int i;
2357         for (i = 0; i < req->num_databaseNames; i++)
2358             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2359     }
2360
2361     yaz_log_zquery_level(log_requestdetail,req->query);
2362
2363     if (assoc->init->bend_search)
2364     {
2365         bsrr->setname = req->resultSetName;
2366         bsrr->replace_set = *req->replaceIndicator;
2367         bsrr->num_bases = req->num_databaseNames;
2368         bsrr->basenames = req->databaseNames;
2369         bsrr->query = req->query;
2370         bsrr->stream = assoc->encode;
2371         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2372         bsrr->decode = assoc->decode;
2373         bsrr->print = assoc->print;
2374         bsrr->hits = 0;
2375         bsrr->errcode = 0;
2376         bsrr->errstring = NULL;
2377         bsrr->search_info = NULL;
2378
2379         if (assoc->cql_transform &&
2380             req->query->which == Z_Query_type_104 &&
2381             req->query->u.type_104->which == Z_External_CQL)
2382         {
2383             /* have a CQL query and a CQL to PQF transform .. */
2384             int srw_errcode =
2385                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2386                         assoc->cql_transform, bsrr->query);
2387             if (srw_errcode)
2388                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2389         }
2390         if (!bsrr->errcode)
2391             (assoc->init->bend_search)(assoc->backend, bsrr);
2392         if (!bsrr->request)  /* backend not ready with the search response */
2393             return 0;  /* should not be used any more */
2394     }
2395     else
2396     {
2397         /* FIXME - make a diagnostic for it */
2398         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2399     }
2400     return response_searchRequest(assoc, reqb, bsrr, fd);
2401 }
2402
2403 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2404
2405 /*
2406  * Prepare a searchresponse based on the backend results. We probably want
2407  * to look at making the fetching of records nonblocking as well, but
2408  * so far, we'll keep things simple.
2409  * If bsrt is null, that means we're called in response to a communications
2410  * event, and we'll have to get the response for ourselves.
2411  */
2412 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2413     bend_search_rr *bsrt, int *fd)
2414 {
2415     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2416     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2417     Z_SearchResponse *resp = (Z_SearchResponse *)
2418         odr_malloc (assoc->encode, sizeof(*resp));
2419     int *nulint = odr_intdup (assoc->encode, 0);
2420     bool_t *sr = odr_intdup(assoc->encode, 1);
2421     int *next = odr_intdup(assoc->encode, 0);
2422     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2423     int returnedrecs=0;
2424
2425     apdu->which = Z_APDU_searchResponse;
2426     apdu->u.searchResponse = resp;
2427     resp->referenceId = req->referenceId;
2428     resp->additionalSearchInfo = 0;
2429     resp->otherInfo = 0;
2430     *fd = -1;
2431     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2432     {
2433         yaz_log(YLOG_FATAL, "Bad result from backend");
2434         return 0;
2435     }
2436     else if (bsrt->errcode)
2437     {
2438         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2439         resp->resultCount = nulint;
2440         resp->numberOfRecordsReturned = nulint;
2441         resp->nextResultSetPosition = nulint;
2442         resp->searchStatus = nulint;
2443         resp->resultSetStatus = none;
2444         resp->presentStatus = 0;
2445     }
2446     else
2447     {
2448         int *toget = odr_intdup(assoc->encode, 0);
2449         int *presst = odr_intdup(assoc->encode, 0);
2450         Z_RecordComposition comp, *compp = 0;
2451
2452         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2453
2454         resp->records = 0;
2455         resp->resultCount = &bsrt->hits;
2456
2457         comp.which = Z_RecordComp_simple;
2458         /* how many records does the user agent want, then? */
2459         if (bsrt->hits <= *req->smallSetUpperBound)
2460         {
2461             *toget = bsrt->hits;
2462             if ((comp.u.simple = req->smallSetElementSetNames))
2463                 compp = &comp;
2464         }
2465         else if (bsrt->hits < *req->largeSetLowerBound)
2466         {
2467             *toget = *req->mediumSetPresentNumber;
2468             if (*toget > bsrt->hits)
2469                 *toget = bsrt->hits;
2470             if ((comp.u.simple = req->mediumSetElementSetNames))
2471                 compp = &comp;
2472         }
2473         else
2474             *toget = 0;
2475
2476         if (*toget && !resp->records)
2477         {
2478             oident *prefformat;
2479             oid_value form;
2480
2481             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2482                 form = VAL_NONE;
2483             else
2484                 form = prefformat->value;
2485             resp->records = pack_records(assoc, req->resultSetName, 1,
2486                                          toget, compp, next, presst, form, req->referenceId,
2487                                          req->preferredRecordSyntax, NULL);
2488             if (!resp->records)
2489                 return 0;
2490             resp->numberOfRecordsReturned = toget;
2491             returnedrecs = *toget;
2492             resp->nextResultSetPosition = next;
2493             resp->searchStatus = sr;
2494             resp->resultSetStatus = 0;
2495             resp->presentStatus = presst;
2496         }
2497         else
2498         {
2499             if (*resp->resultCount)
2500                 *next = 1;
2501             resp->numberOfRecordsReturned = nulint;
2502             resp->nextResultSetPosition = next;
2503             resp->searchStatus = sr;
2504             resp->resultSetStatus = 0;
2505             resp->presentStatus = 0;
2506         }
2507     }
2508     resp->additionalSearchInfo = bsrt->search_info;
2509
2510     if (log_request)
2511     {
2512         WRBUF wr = wrbuf_alloc();
2513         if (bsrt->errcode)
2514             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2515         else
2516             wrbuf_printf(wr, "OK %d", bsrt->hits);
2517         wrbuf_printf(wr, " %s 1+%d ",
2518                      req->resultSetName, returnedrecs);
2519         yaz_query_to_wrbuf(wr, req->query);
2520
2521         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2522         wrbuf_free(wr, 1);
2523     }
2524     return apdu;
2525 }
2526
2527 /*
2528  * Maybe we got a little over-friendly when we designed bend_fetch to
2529  * get only one record at a time. Some backends can optimise multiple-record
2530  * fetches, and at any rate, there is some overhead involved in
2531  * all that selecting and hopping around. Problem is, of course, that the
2532  * frontend can't know ahead of time how many records it'll need to
2533  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2534  * is downright lousy as a bulk data transfer protocol.
2535  *
2536  * To start with, we'll do the fetching of records from the backend
2537  * in one operation: To save some trips in and out of the event-handler,
2538  * and to simplify the interface to pack_records. At any rate, asynch
2539  * operation is more fun in operations that have an unpredictable execution
2540  * speed - which is normally more true for search than for present.
2541  */
2542 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2543                                       int *fd)
2544 {
2545     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2546     oident *prefformat;
2547     oid_value form;
2548     Z_APDU *apdu;
2549     Z_PresentResponse *resp;
2550     int *next;
2551     int *num;
2552     int errcode = 0;
2553     const char *errstring = 0;
2554
2555     yaz_log(log_requestdetail, "Got PresentRequest.");
2556
2557     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2558         form = VAL_NONE;
2559     else
2560         form = prefformat->value;
2561     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2562     resp->records = 0;
2563     resp->presentStatus = odr_intdup(assoc->encode, 0);
2564     if (assoc->init->bend_present)
2565     {
2566         bend_present_rr *bprr = (bend_present_rr *)
2567             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2568         bprr->setname = req->resultSetId;
2569         bprr->start = *req->resultSetStartPoint;
2570         bprr->number = *req->numberOfRecordsRequested;
2571         bprr->format = form;
2572         bprr->comp = req->recordComposition;
2573         bprr->referenceId = req->referenceId;
2574         bprr->stream = assoc->encode;
2575         bprr->print = assoc->print;
2576         bprr->request = reqb;
2577         bprr->association = assoc;
2578         bprr->errcode = 0;
2579         bprr->errstring = NULL;
2580         (*assoc->init->bend_present)(assoc->backend, bprr);
2581
2582         if (!bprr->request)
2583             return 0; /* should not happen */
2584         if (bprr->errcode)
2585         {
2586             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2587             *resp->presentStatus = Z_PresentStatus_failure;
2588             errcode = bprr->errcode;
2589             errstring = bprr->errstring;
2590         }
2591     }
2592     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2593     next = odr_intdup(assoc->encode, 0);
2594     num = odr_intdup(assoc->encode, 0);
2595
2596     apdu->which = Z_APDU_presentResponse;
2597     apdu->u.presentResponse = resp;
2598     resp->referenceId = req->referenceId;
2599     resp->otherInfo = 0;
2600
2601     if (!resp->records)
2602     {
2603         *num = *req->numberOfRecordsRequested;
2604         resp->records =
2605             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2606                          num, req->recordComposition, next,
2607                          resp->presentStatus,
2608                          form, req->referenceId, req->preferredRecordSyntax,
2609                          &errcode);
2610     }
2611     if (log_request)
2612     {
2613         WRBUF wr = wrbuf_alloc();
2614         wrbuf_printf(wr, "Present ");
2615
2616         if (*resp->presentStatus == Z_PresentStatus_failure)
2617             wrbuf_printf(wr, "ERROR %d", errcode);
2618         else if (*resp->presentStatus == Z_PresentStatus_success)
2619             wrbuf_printf(wr, "OK -");
2620         else
2621             wrbuf_printf(wr, "Partial %d", *resp->presentStatus);
2622
2623         wrbuf_printf(wr, " %s %d+%d ",
2624                 req->resultSetId, *req->resultSetStartPoint,
2625                 *req->numberOfRecordsRequested);
2626         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2627         wrbuf_free(wr, 1);
2628     }
2629     if (!resp->records)
2630         return 0;
2631     resp->numberOfRecordsReturned = num;
2632     resp->nextResultSetPosition = next;
2633
2634     return apdu;
2635 }
2636
2637 /*
2638  * Scan was implemented rather in a hurry, and with support for only the basic
2639  * elements of the service in the backend API. Suggestions are welcome.
2640  */
2641 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2642 {
2643     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2644     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2645     Z_ScanResponse *res = (Z_ScanResponse *)
2646         odr_malloc (assoc->encode, sizeof(*res));
2647     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2648     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2649     Z_ListEntries *ents = (Z_ListEntries *)
2650         odr_malloc (assoc->encode, sizeof(*ents));
2651     Z_DiagRecs *diagrecs_p = NULL;
2652     oident *attset;
2653     bend_scan_rr *bsrr = (bend_scan_rr *)
2654         odr_malloc (assoc->encode, sizeof(*bsrr));
2655     struct scan_entry *save_entries;
2656
2657     yaz_log(log_requestdetail, "Got ScanRequest");
2658
2659     apdu->which = Z_APDU_scanResponse;
2660     apdu->u.scanResponse = res;
2661     res->referenceId = req->referenceId;
2662
2663     /* if step is absent, set it to 0 */
2664     res->stepSize = odr_intdup(assoc->encode, 0);
2665     if (req->stepSize)
2666         *res->stepSize = *req->stepSize;
2667
2668     res->scanStatus = scanStatus;
2669     res->numberOfEntriesReturned = numberOfEntriesReturned;
2670     res->positionOfTerm = 0;
2671     res->entries = ents;
2672     ents->num_entries = 0;
2673     ents->entries = NULL;
2674     ents->num_nonsurrogateDiagnostics = 0;
2675     ents->nonsurrogateDiagnostics = NULL;
2676     res->attributeSet = 0;
2677     res->otherInfo = 0;
2678
2679     if (req->databaseNames)
2680     {
2681         int i;
2682         for (i = 0; i < req->num_databaseNames; i++)
2683             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2684     }
2685     bsrr->scanClause = 0;
2686     bsrr->errcode = 0;
2687     bsrr->errstring = 0;
2688     bsrr->num_bases = req->num_databaseNames;
2689     bsrr->basenames = req->databaseNames;
2690     bsrr->num_entries = *req->numberOfTermsRequested;
2691     bsrr->term = req->termListAndStartPoint;
2692     bsrr->referenceId = req->referenceId;
2693     bsrr->stream = assoc->encode;
2694     bsrr->print = assoc->print;
2695     bsrr->step_size = res->stepSize;
2696     bsrr->entries = 0;
2697     /* For YAZ 2.0 and earlier it was the backend handler that
2698        initialized entries (member display_term did not exist)
2699        YAZ 2.0 and later sets 'entries'  and initialize all members
2700        including 'display_term'. If YAZ 2.0 or later sees that
2701        entries was modified - we assume that it is an old handler and
2702        that 'display_term' is _not_ set.
2703     */
2704     if (bsrr->num_entries > 0)
2705     {
2706         int i;
2707         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
2708                                    bsrr->num_entries);
2709         for (i = 0; i<bsrr->num_entries; i++)
2710         {
2711             bsrr->entries[i].term = 0;
2712             bsrr->entries[i].occurrences = 0;
2713             bsrr->entries[i].errcode = 0;
2714             bsrr->entries[i].errstring = 0;
2715             bsrr->entries[i].display_term = 0;
2716         }
2717     }
2718     save_entries = bsrr->entries;  /* save it so we can compare later */
2719
2720     if (req->attributeSet &&
2721         (attset = oid_getentbyoid(req->attributeSet)) &&
2722         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
2723         bsrr->attributeset = attset->value;
2724     else
2725         bsrr->attributeset = VAL_NONE;
2726     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
2727             bsrr->attributeset);
2728     bsrr->term_position = req->preferredPositionInResponse ?
2729         *req->preferredPositionInResponse : 1;
2730
2731     ((int (*)(void *, bend_scan_rr *))
2732      (*assoc->init->bend_scan))(assoc->backend, bsrr);
2733
2734     if (bsrr->errcode)
2735         diagrecs_p = zget_DiagRecs(assoc->encode,
2736                                    bsrr->errcode, bsrr->errstring);
2737     else
2738     {
2739         int i;
2740         Z_Entry **tab = (Z_Entry **)
2741             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
2742
2743         if (bsrr->status == BEND_SCAN_PARTIAL)
2744             *scanStatus = Z_Scan_partial_5;
2745         else
2746             *scanStatus = Z_Scan_success;
2747         ents->entries = tab;
2748         ents->num_entries = bsrr->num_entries;
2749         res->numberOfEntriesReturned = &ents->num_entries;
2750         res->positionOfTerm = &bsrr->term_position;
2751         for (i = 0; i < bsrr->num_entries; i++)
2752         {
2753             Z_Entry *e;
2754             Z_TermInfo *t;
2755             Odr_oct *o;
2756
2757             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
2758             if (bsrr->entries[i].occurrences >= 0)
2759             {
2760                 e->which = Z_Entry_termInfo;
2761                 e->u.termInfo = t = (Z_TermInfo *)
2762                     odr_malloc(assoc->encode, sizeof(*t));
2763                 t->suggestedAttributes = 0;
2764                 t->displayTerm = 0;
2765                 if (save_entries == bsrr->entries &&
2766                     bsrr->entries[i].display_term)
2767                 {
2768                     /* the entries was _not_ set by the handler. So it's
2769                        safe to test for new member display_term. It is
2770                        NULL'ed by us.
2771                     */
2772                     t->displayTerm = odr_strdup(assoc->encode,
2773                                                 bsrr->entries[i].display_term);
2774                 }
2775                 t->alternativeTerm = 0;
2776                 t->byAttributes = 0;
2777                 t->otherTermInfo = 0;
2778                 t->globalOccurrences = &bsrr->entries[i].occurrences;
2779                 t->term = (Z_Term *)
2780                     odr_malloc(assoc->encode, sizeof(*t->term));
2781                 t->term->which = Z_Term_general;
2782                 t->term->u.general = o =
2783                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
2784                 o->buf = (unsigned char *)
2785                     odr_malloc(assoc->encode, o->len = o->size =
2786                                strlen(bsrr->entries[i].term));
2787                 memcpy(o->buf, bsrr->entries[i].term, o->len);
2788                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
2789                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
2790             }
2791             else
2792             {
2793                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
2794                                                   bsrr->entries[i].errcode,
2795                                                   bsrr->entries[i].errstring);
2796                 assert (drecs->num_diagRecs == 1);
2797                 e->which = Z_Entry_surrogateDiagnostic;
2798                 assert (drecs->diagRecs[0]);
2799                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
2800             }
2801         }
2802     }
2803     if (diagrecs_p)
2804     {
2805         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
2806         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
2807     }
2808     if (log_request)
2809     {
2810         WRBUF wr = wrbuf_alloc();
2811         if (bsrr->errcode)
2812             wr_diag(wr, bsrr->errcode, bsrr->errstring);
2813         else if (*res->scanStatus == Z_Scan_success)
2814             wrbuf_printf(wr, "OK");
2815         else
2816             wrbuf_printf(wr, "Partial");
2817
2818         wrbuf_printf(wr, " %d+%d %d ",
2819                      (req->preferredPositionInResponse ?
2820                       *req->preferredPositionInResponse : 1),
2821                      *req->numberOfTermsRequested,
2822                      (res->stepSize ? *res->stepSize : 0));
2823         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
2824                           bsrr->attributeset);
2825         yaz_log(log_request, "Scan %s", wrbuf_buf(wr) );
2826         wrbuf_free(wr, 1);
2827     }
2828     return apdu;
2829 }
2830
2831 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
2832     int *fd)
2833 {
2834     int i;
2835     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
2836     Z_SortResponse *res = (Z_SortResponse *)
2837         odr_malloc (assoc->encode, sizeof(*res));
2838     bend_sort_rr *bsrr = (bend_sort_rr *)
2839         odr_malloc (assoc->encode, sizeof(*bsrr));
2840
2841     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2842
2843     yaz_log(log_requestdetail, "Got SortRequest.");
2844
2845     bsrr->num_input_setnames = req->num_inputResultSetNames;
2846     for (i=0;i<req->num_inputResultSetNames;i++)
2847         yaz_log(log_requestdetail, "Input resultset: '%s'",
2848                 req->inputResultSetNames[i]);
2849     bsrr->input_setnames = req->inputResultSetNames;
2850     bsrr->referenceId = req->referenceId;
2851     bsrr->output_setname = req->sortedResultSetName;
2852     yaz_log(log_requestdetail, "Output resultset: '%s'",
2853                 req->sortedResultSetName);
2854     bsrr->sort_sequence = req->sortSequence;
2855        /*FIXME - dump those sequences too */
2856     bsrr->stream = assoc->encode;
2857     bsrr->print = assoc->print;
2858
2859     bsrr->sort_status = Z_SortResponse_failure;
2860     bsrr->errcode = 0;
2861     bsrr->errstring = 0;
2862
2863     (*assoc->init->bend_sort)(assoc->backend, bsrr);
2864
2865     res->referenceId = bsrr->referenceId;
2866     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
2867     res->resultSetStatus = 0;
2868     if (bsrr->errcode)
2869     {
2870         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
2871                                        bsrr->errcode, bsrr->errstring);
2872         res->diagnostics = dr->diagRecs;
2873         res->num_diagnostics = dr->num_diagRecs;
2874     }
2875     else
2876     {
2877         res->num_diagnostics = 0;
2878         res->diagnostics = 0;
2879     }
2880     res->resultCount = 0;
2881     res->otherInfo = 0;
2882
2883     apdu->which = Z_APDU_sortResponse;
2884     apdu->u.sortResponse = res;
2885     if (log_request)
2886     {
2887         WRBUF wr = wrbuf_alloc();
2888         wrbuf_printf(wr, "Sort ");
2889         if (bsrr->errcode)
2890             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
2891         else
2892             wrbuf_printf(wr,  "OK -");
2893         wrbuf_printf(wr, " (");
2894         for (i = 0; i<req->num_inputResultSetNames; i++)
2895         {
2896             if (i)
2897                 wrbuf_printf(wr, ",");
2898             wrbuf_printf(wr, req->inputResultSetNames[i]);
2899         }
2900         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
2901
2902         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2903         wrbuf_free(wr, 1);
2904     }
2905     return apdu;
2906 }
2907
2908 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
2909     int *fd)
2910 {
2911     int i;
2912     Z_DeleteResultSetRequest *req =
2913         reqb->apdu_request->u.deleteResultSetRequest;
2914     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
2915         odr_malloc (assoc->encode, sizeof(*res));
2916     bend_delete_rr *bdrr = (bend_delete_rr *)
2917         odr_malloc (assoc->encode, sizeof(*bdrr));
2918     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2919
2920     yaz_log(log_requestdetail, "Got DeleteRequest.");
2921
2922     bdrr->num_setnames = req->num_resultSetList;
2923     bdrr->setnames = req->resultSetList;
2924     for (i = 0; i<req->num_resultSetList; i++)
2925         yaz_log(log_requestdetail, "resultset: '%s'",
2926                 req->resultSetList[i]);
2927     bdrr->stream = assoc->encode;
2928     bdrr->print = assoc->print;
2929     bdrr->function = *req->deleteFunction;
2930     bdrr->referenceId = req->referenceId;
2931     bdrr->statuses = 0;
2932     if (bdrr->num_setnames > 0)
2933     {
2934         bdrr->statuses = (int*)
2935             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
2936                        bdrr->num_setnames);
2937         for (i = 0; i < bdrr->num_setnames; i++)
2938             bdrr->statuses[i] = 0;
2939     }
2940     (*assoc->init->bend_delete)(assoc->backend, bdrr);
2941
2942     res->referenceId = req->referenceId;
2943
2944     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
2945
2946     res->deleteListStatuses = 0;
2947     if (bdrr->num_setnames > 0)
2948     {
2949         int i;
2950         res->deleteListStatuses = (Z_ListStatuses *)
2951             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
2952         res->deleteListStatuses->num = bdrr->num_setnames;
2953         res->deleteListStatuses->elements =
2954             (Z_ListStatus **)
2955             odr_malloc (assoc->encode,
2956                         sizeof(*res->deleteListStatuses->elements) *
2957                         bdrr->num_setnames);
2958         for (i = 0; i<bdrr->num_setnames; i++)
2959         {
2960             res->deleteListStatuses->elements[i] =
2961                 (Z_ListStatus *)
2962                 odr_malloc (assoc->encode,
2963                             sizeof(**res->deleteListStatuses->elements));
2964             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
2965             res->deleteListStatuses->elements[i]->id =
2966                 odr_strdup (assoc->encode, bdrr->setnames[i]);
2967         }
2968     }
2969     res->numberNotDeleted = 0;
2970     res->bulkStatuses = 0;
2971     res->deleteMessage = 0;
2972     res->otherInfo = 0;
2973
2974     apdu->which = Z_APDU_deleteResultSetResponse;
2975     apdu->u.deleteResultSetResponse = res;
2976     if (log_request)
2977     {
2978         WRBUF wr = wrbuf_alloc();
2979         wrbuf_printf(wr, "Delete ");
2980         if (bdrr->delete_status)
2981             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
2982         else
2983             wrbuf_printf(wr, "OK -");
2984         for (i = 0; i<req->num_resultSetList; i++)
2985             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
2986         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2987         wrbuf_free(wr, 1);
2988     }
2989     return apdu;
2990 }
2991
2992 static void process_close(association *assoc, request *reqb)
2993 {
2994     Z_Close *req = reqb->apdu_request->u.close;
2995     static char *reasons[] =
2996     {
2997         "finished",
2998         "shutdown",
2999         "systemProblem",
3000         "costLimit",
3001         "resources",
3002         "securityViolation",
3003         "protocolError",
3004         "lackOfActivity",
3005         "peerAbort",
3006         "unspecified"
3007     };
3008
3009     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3010         reasons[*req->closeReason], req->diagnosticInformation ?
3011         req->diagnosticInformation : "NULL");
3012     if (assoc->version < 3) /* to make do_force respond with close */
3013         assoc->version = 3;
3014     do_close_req(assoc, Z_Close_finished,
3015                  "Association terminated by client", reqb);
3016     yaz_log(log_request,"Close OK");
3017 }
3018
3019 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3020 {
3021     if (refid)
3022     {
3023         reqb->len_refid = refid->len;
3024         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3025         memcpy (reqb->refid, refid->buf, refid->len);
3026     }
3027     else
3028     {
3029         reqb->len_refid = 0;
3030         reqb->refid = NULL;
3031     }
3032 }
3033
3034 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3035 {
3036     process_z_response (a, req, res);
3037 }
3038
3039 bend_request bend_request_mk (bend_association a)
3040 {
3041     request *nreq = request_get (&a->outgoing);
3042     nreq->request_mem = nmem_create ();
3043     return nreq;
3044 }
3045
3046 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3047 {
3048     Z_ReferenceId *id;
3049     if (!req->refid)
3050         return 0;
3051     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3052     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3053     id->len = id->size = req->len_refid;
3054     memcpy (id->buf, req->refid, req->len_refid);
3055     return id;
3056 }
3057
3058 void bend_request_destroy (bend_request *req)
3059 {
3060     nmem_destroy((*req)->request_mem);
3061     request_release(*req);
3062     *req = NULL;
3063 }
3064
3065 int bend_backend_respond (bend_association a, bend_request req)
3066 {
3067     char *msg;
3068     int r;
3069     r = process_z_request (a, req, &msg);
3070     if (r < 0)
3071         yaz_log (YLOG_WARN, "%s", msg);
3072     return r;
3073 }
3074
3075 void bend_request_setdata(bend_request r, void *p)
3076 {
3077     r->clientData = p;
3078 }
3079
3080 void *bend_request_getdata(bend_request r)
3081 {
3082     return r->clientData;
3083 }
3084
3085 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3086 {
3087     bend_segment_rr req;
3088
3089     req.segment = reqb->apdu_request->u.segmentRequest;
3090     req.stream = assoc->encode;
3091     req.decode = assoc->decode;
3092     req.print = assoc->print;
3093     req.association = assoc;
3094
3095     (*assoc->init->bend_segment)(assoc->backend, &req);
3096
3097     return 0;
3098 }
3099
3100 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3101 {
3102     bend_esrequest_rr esrequest;
3103     const char *ext_name = "unknown";
3104
3105     Z_ExtendedServicesRequest *req =
3106         reqb->apdu_request->u.extendedServicesRequest;
3107     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3108
3109     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3110
3111     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3112     esrequest.stream = assoc->encode;
3113     esrequest.decode = assoc->decode;
3114     esrequest.print = assoc->print;
3115     esrequest.errcode = 0;
3116     esrequest.errstring = NULL;
3117     esrequest.request = reqb;
3118     esrequest.association = assoc;
3119     esrequest.taskPackage = 0;
3120     esrequest.referenceId = req->referenceId;
3121
3122
3123     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3124     {
3125         switch(esrequest.esr->taskSpecificParameters->which)
3126         {
3127         case Z_External_itemOrder:
3128             ext_name = "ItemOrder"; break;
3129         case Z_External_update:
3130             ext_name = "Update"; break;
3131         case Z_External_update0:
3132             ext_name = "Update0"; break;
3133         case Z_External_ESAdmin:
3134             ext_name = "Admin"; break;
3135
3136         }
3137     }
3138
3139     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3140
3141     /* If the response is being delayed, return NULL */
3142     if (esrequest.request == NULL)
3143         return(NULL);
3144
3145     resp->referenceId = req->referenceId;
3146
3147     if (esrequest.errcode == -1)
3148     {
3149         /* Backend service indicates request will be processed */
3150         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3151         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3152     }
3153     else if (esrequest.errcode == 0)
3154     {
3155         /* Backend service indicates request will be processed */
3156         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3157         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3158     }
3159     else
3160     {
3161         Z_DiagRecs *diagRecs =
3162             zget_DiagRecs(assoc->encode, esrequest.errcode,
3163                           esrequest.errstring);
3164         /* Backend indicates error, request will not be processed */
3165         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3166         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3167         resp->num_diagnostics = diagRecs->num_diagRecs;
3168         resp->diagnostics = diagRecs->diagRecs;
3169         if (log_request)
3170         {
3171             WRBUF wr = wrbuf_alloc();
3172             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3173             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3174             wrbuf_free(wr, 1);
3175         }
3176
3177     }
3178     /* Do something with the members of bend_extendedservice */
3179     if (esrequest.taskPackage)
3180         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3181                                          (const char *)  esrequest.taskPackage,
3182                                           -1);
3183     yaz_log(YLOG_DEBUG,"Send the result apdu");
3184     return apdu;
3185 }
3186
3187 /*
3188  * Local variables:
3189  * c-basic-offset: 4
3190  * indent-tabs-mode: nil
3191  * End:
3192  * vim: shiftwidth=4 tabstop=8 expandtab
3193  */
3194