src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2010 Index Data
   3  * See the file LICENSE for details.
   4  */
   5 /**
   6  * \file seshigh.c
   7  * \brief Implements GFS session logic.
   8  *
   9  * Frontend server logic.
  10  *
  11  * This code receives incoming APDUs, and handles client requests by means
  12  * of the backend API.
  13  *
  14  * Some of the code is getting quite involved, compared to simpler servers -
  15  * primarily because it is asynchronous both in the communication with
  16  * the user and the backend. We think the complexity will pay off in
  17  * the form of greater flexibility when more asynchronous facilities
  18  * are implemented.
  19  *
  20  * Memory management has become somewhat involved. In the simple case, where
  21  * only one PDU is pending at a time, it will simply reuse the same memory,
  22  * once it has found its working size. When we enable multiple concurrent
  23  * operations, perhaps even with multiple parallel calls to the backend, it
  24  * will maintain a pool of buffers for encoding and decoding, trying to
  25  * minimize memory allocation/deallocation during normal operation.
  26  *
  27  */
  28
  29 #include <limits.h>
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #include <assert.h>
  33 #include <ctype.h>
  34
  35 #if HAVE_SYS_TYPES_H
  36 #include <sys/types.h>
  37 #endif
  38 #if HAVE_SYS_STAT_H
  39 #include <sys/stat.h>
  40 #endif
  41
  42 #ifdef WIN32
  43 #include <io.h>
  44 #define S_ISREG(x) (x & _S_IFREG)
  45 #include <process.h>
  46 #endif
  47
  48 #if HAVE_UNISTD_H
  49 #include <unistd.h>
  50 #endif
  51
  52 #if YAZ_HAVE_XML2
  53 #include <libxml/parser.h>
  54 #include <libxml/tree.h>
  55 #endif
  56
  57 #include <yaz/yconfig.h>
  58 #include <yaz/xmalloc.h>
  59 #include <yaz/comstack.h>
  60 #include "eventl.h"
  61 #include "session.h"
  62 #include "mime.h"
  63 #include <yaz/proto.h>
  64 #include <yaz/oid_db.h>
  65 #include <yaz/log.h>
  66 #include <yaz/logrpn.h>
  67 #include <yaz/querytowrbuf.h>
  68 #include <yaz/statserv.h>
  69 #include <yaz/diagbib1.h>
  70 #include <yaz/charneg.h>
  71 #include <yaz/otherinfo.h>
  72 #include <yaz/yaz-util.h>
  73 #include <yaz/pquery.h>
  74 #include <yaz/oid_db.h>
  75
  76 #include <yaz/srw.h>
  77 #include <yaz/backend.h>
  78 #include <yaz/yaz-ccl.h>
  79
  80 static void process_gdu_request(association *assoc, request *req);
  81 static int process_z_request(association *assoc, request *req, char **msg);
  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 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  89                                       bend_search_rr *bsrr);
  90 static Z_APDU *process_presentRequest(association *assoc, request *reqb);
  91 static Z_APDU *process_scanRequest(association *assoc, request *reqb);
  92 static Z_APDU *process_sortRequest(association *assoc, request *reqb);
  93 static void process_close(association *assoc, request *reqb);
  94 static Z_APDU *process_deleteRequest(association *assoc, request *reqb);
  95 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
  96 static Z_APDU *process_ESRequest(association *assoc, request *reqb);
  97
  98 /* dynamic logging levels */
  99 static int logbits_set = 0;
 100 static int log_session = 0; /* one-line logs for session */
 101 static int log_sessiondetail = 0; /* more detailed stuff */
 102 static int log_request = 0; /* one-line logs for requests */
 103 static int log_requestdetail = 0;  /* more detailed stuff */
 104
 105 /** get_logbits sets global loglevel bits */
 106 static void get_logbits(void)
 107 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 108     if (!logbits_set)
 109     {
 110         logbits_set = 1;
 111         log_session = yaz_log_module_level("session");
 112         log_sessiondetail = yaz_log_module_level("sessiondetail");
 113         log_request = yaz_log_module_level("request");
 114         log_requestdetail = yaz_log_module_level("requestdetail");
 115     }
 116 }
 117
 118 static void wr_diag(WRBUF w, int error, const char *addinfo)
 119 {
 120     wrbuf_printf(w, "ERROR %d+", error);
 121     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 122     if (addinfo)
 123     {
 124         wrbuf_puts(w, "+");
 125         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 126     }
 127     wrbuf_puts(w, " ");
 128 }
 129
 130 /*
 131  * Create and initialize a new association-handle.
 132  *  channel  : iochannel for the current line.
 133  *  link     : communications channel.
 134  * Returns: 0 or a new association handle.
 135  */
 136 association *create_association(IOCHAN channel, COMSTACK link,
 137                                 const char *apdufile)
 138 {
 139     association *anew;
 140
 141     if (!logbits_set)
 142         get_logbits();
 143     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 144         return 0;
 145     anew->init = 0;
 146     anew->version = 0;
 147     anew->last_control = 0;
 148     anew->client_chan = channel;
 149     anew->client_link = link;
 150     anew->cs_get_mask = 0;
 151     anew->cs_put_mask = 0;
 152     anew->cs_accept_mask = 0;
 153     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 154         !(anew->encode = odr_createmem(ODR_ENCODE)))
 155         return 0;
 156     if (apdufile && *apdufile)
 157     {
 158         FILE *f;
 159
 160         if (!(anew->print = odr_createmem(ODR_PRINT)))
 161             return 0;
 162         if (*apdufile == '@')
 163         {
 164             odr_setprint(anew->print, yaz_log_file());
 165         }
 166         else if (*apdufile != '-')
 167         {
 168             char filename[256];
 169             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 170             if (!(f = fopen(filename, "w")))
 171             {
 172                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 173                 return 0;
 174             }
 175             setvbuf(f, 0, _IONBF, 0);
 176             odr_setprint(anew->print, f);
 177         }
 178     }
 179     else
 180         anew->print = 0;
 181     anew->input_buffer = 0;
 182     anew->input_buffer_len = 0;
 183     anew->backend = 0;
 184     anew->state = ASSOC_NEW;
 185     request_initq(&anew->incoming);
 186     request_initq(&anew->outgoing);
 187     anew->proto = cs_getproto(link);
 188     anew->server = 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 = zget_APDU(a->encode, Z_APDU_close);
 227     Z_Close *cls = apdu->u.close;
 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         *cls->closeReason = reason;
 237         cls->diagnosticInformation = message;
 238         process_z_response(a, req, apdu);
 239         iochan_settimeout(a->client_chan, 20);
 240     }
 241     else
 242     {
 243         request_release(req);
 244         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 245         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 246         a->cs_put_mask = 0;
 247     }
 248     a->state = ASSOC_DEAD;
 249 }
 250
 251 static void do_close(association *a, int reason, char *message)
 252 {
 253     request *req = request_get(&a->outgoing);
 254     do_close_req(a, reason, message, req);
 255 }
 256
 257
 258 int ir_read(IOCHAN h, int event)
 259 {
 260     association *assoc = (association *)iochan_getdata(h);
 261     COMSTACK conn = assoc->client_link;
 262     request *req;
 263
 264     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 265     {
 266         yaz_log(YLOG_DEBUG, "ir_session (input)");
 267         /* We aren't speaking to this fellow */
 268         if (assoc->state == ASSOC_DEAD)
 269         {
 270             yaz_log(log_sessiondetail, "Connection closed - end of session");
 271             cs_close(conn);
 272             destroy_association(assoc);
 273             iochan_destroy(h);
 274             return 0;
 275         }
 276         assoc->cs_get_mask = EVENT_INPUT;
 277
 278         do
 279         {
 280             int res = cs_get(conn, &assoc->input_buffer,
 281                              &assoc->input_buffer_len);
 282             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 283             {
 284                 yaz_log(log_session, "Connection error: %s res=%d",
 285                         cs_errmsg(cs_errno(conn)), res);
 286                 req = request_get(&assoc->incoming); /* get a new request */
 287                 do_close_req(assoc, Z_Close_protocolError,
 288                              "Incoming package too large", req);
 289                 return 0;
 290             }
 291             else if (res <= 0)
 292             {
 293                 yaz_log(log_session, "Connection closed by client");
 294                 assoc->state = ASSOC_DEAD;
 295                 return 0;
 296             }
 297             else if (res == 1) /* incomplete read - wait for more  */
 298             {
 299                 if (conn->io_pending & CS_WANT_WRITE)
 300                     assoc->cs_get_mask |= EVENT_OUTPUT;
 301                 iochan_setflag(h, assoc->cs_get_mask);
 302                 return 0;
 303             }
 304             /* we got a complete PDU. Let's decode it */
 305             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 306                     assoc->input_buffer[0] & 0xff,
 307                     assoc->input_buffer[1] & 0xff,
 308                     assoc->input_buffer[2] & 0xff);
 309             req = request_get(&assoc->incoming); /* get a new request */
 310             odr_reset(assoc->decode);
 311             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 312             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 313             {
 314                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 315                         "[near byte %ld] ",
 316                         odr_errmsg(odr_geterror(assoc->decode)),
 317                         odr_getelement(assoc->decode),
 318                         (long) odr_offset(assoc->decode));
 319                 if (assoc->decode->error != OHTTP)
 320                 {
 321                     yaz_log(YLOG_WARN, "PDU dump:");
 322                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 323                     request_release(req);
 324                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 325                 }
 326                 else
 327                 {
 328                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 329                     assoc->state = ASSOC_DEAD;
 330                     process_gdu_response(assoc, req, p);
 331                 }
 332                 return 0;
 333             }
 334             req->request_mem = odr_extract_mem(assoc->decode);
 335             if (assoc->print)
 336             {
 337                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 338                     yaz_log(YLOG_WARN, "ODR print error: %s",
 339                             odr_errmsg(odr_geterror(assoc->print)));
 340                 odr_reset(assoc->print);
 341             }
 342             request_enq(&assoc->incoming, req);
 343         }
 344         while (cs_more(conn));
 345     }
 346     return 1;
 347 }
 348
 349 /*
 350  * This is where PDUs from the client are read and the further
 351  * processing is initiated. Flow of control moves down through the
 352  * various process_* functions below, until the encoded result comes back up
 353  * to the output handler in here.
 354  *
 355  *  h     : the I/O channel that has an outstanding event.
 356  *  event : the current outstanding event.
 357  */
 358 void ir_session(IOCHAN h, int event)
 359 {
 360     int res;
 361     association *assoc = (association *)iochan_getdata(h);
 362     COMSTACK conn = assoc->client_link;
 363     request *req;
 364
 365     assert(h && conn && assoc);
 366     if (event == EVENT_TIMEOUT)
 367     {
 368         if (assoc->state != ASSOC_UP)
 369         {
 370             yaz_log(log_session, "Timeout. Closing connection");
 371             /* do we need to lod this at all */
 372             cs_close(conn);
 373             destroy_association(assoc);
 374             iochan_destroy(h);
 375         }
 376         else
 377         {
 378             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 379             do_close(assoc, Z_Close_lackOfActivity, 0);
 380         }
 381         return;
 382     }
 383     if (event & assoc->cs_accept_mask)
 384     {
 385         if (!cs_accept(conn))
 386         {
 387             yaz_log(YLOG_WARN, "accept failed");
 388             destroy_association(assoc);
 389             iochan_destroy(h);
 390             return;
 391         }
 392         iochan_clearflag(h, EVENT_OUTPUT);
 393         if (conn->io_pending)
 394         {   /* cs_accept didn't complete */
 395             assoc->cs_accept_mask =
 396                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 397                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 398
 399             iochan_setflag(h, assoc->cs_accept_mask);
 400         }
 401         else
 402         {   /* cs_accept completed. Prepare for reading (cs_get) */
 403             assoc->cs_accept_mask = 0;
 404             assoc->cs_get_mask = EVENT_INPUT;
 405             iochan_setflag(h, assoc->cs_get_mask);
 406         }
 407         return;
 408     }
 409     if (event & assoc->cs_get_mask) /* input */
 410     {
 411         if (!ir_read(h, event))
 412             return;
 413         req = request_head(&assoc->incoming);
 414         if (req->state == REQUEST_IDLE)
 415         {
 416             request_deq(&assoc->incoming);
 417             process_gdu_request(assoc, req);
 418         }
 419     }
 420     if (event & assoc->cs_put_mask)
 421     {
 422         request *req = request_head(&assoc->outgoing);
 423
 424         assoc->cs_put_mask = 0;
 425         yaz_log(YLOG_DEBUG, "ir_session (output)");
 426         req->state = REQUEST_PENDING;
 427         switch (res = cs_put(conn, req->response, req->len_response))
 428         {
 429         case -1:
 430             yaz_log(log_sessiondetail, "Connection closed by client");
 431             cs_close(conn);
 432             destroy_association(assoc);
 433             iochan_destroy(h);
 434             break;
 435         case 0: /* all sent - release the request structure */
 436             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 437 #if 0
 438             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 439                     req->response);
 440 #endif
 441             nmem_destroy(req->request_mem);
 442             request_deq(&assoc->outgoing);
 443             request_release(req);
 444             if (!request_head(&assoc->outgoing))
 445             {   /* restore mask for cs_get operation ... */
 446                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 447                 iochan_setflag(h, assoc->cs_get_mask);
 448                 if (assoc->state == ASSOC_DEAD)
 449                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 450             }
 451             else
 452             {
 453                 assoc->cs_put_mask = EVENT_OUTPUT;
 454             }
 455             break;
 456         default:
 457             if (conn->io_pending & CS_WANT_WRITE)
 458                 assoc->cs_put_mask |= EVENT_OUTPUT;
 459             if (conn->io_pending & CS_WANT_READ)
 460                 assoc->cs_put_mask |= EVENT_INPUT;
 461             iochan_setflag(h, assoc->cs_put_mask);
 462         }
 463     }
 464     if (event & EVENT_EXCEPT)
 465     {
 466         yaz_log(YLOG_WARN, "ir_session (exception)");
 467         cs_close(conn);
 468         destroy_association(assoc);
 469         iochan_destroy(h);
 470     }
 471 }
 472
 473 static int process_z_request(association *assoc, request *req, char **msg);
 474
 475
 476 static void assoc_init_reset(association *assoc)
 477 {
 478     xfree(assoc->init);
 479     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 480
 481     assoc->init->stream = assoc->encode;
 482     assoc->init->print = assoc->print;
 483     assoc->init->auth = 0;
 484     assoc->init->referenceId = 0;
 485     assoc->init->implementation_version = 0;
 486     assoc->init->implementation_id = 0;
 487     assoc->init->implementation_name = 0;
 488     assoc->init->query_charset = 0;
 489     assoc->init->records_in_same_charset = 0;
 490     assoc->init->bend_sort = NULL;
 491     assoc->init->bend_search = NULL;
 492     assoc->init->bend_present = NULL;
 493     assoc->init->bend_esrequest = NULL;
 494     assoc->init->bend_delete = NULL;
 495     assoc->init->bend_scan = NULL;
 496     assoc->init->bend_segment = NULL;
 497     assoc->init->bend_fetch = NULL;
 498     assoc->init->bend_explain = NULL;
 499     assoc->init->bend_srw_scan = NULL;
 500     assoc->init->bend_srw_update = NULL;
 501     assoc->init->named_result_sets = 0;
 502
 503     assoc->init->charneg_request = NULL;
 504     assoc->init->charneg_response = NULL;
 505
 506     assoc->init->decode = assoc->decode;
 507     assoc->init->peer_name =
 508         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 509
 510     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 511 }
 512
 513 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 514 {
 515     statserv_options_block *cb = statserv_getcontrol();
 516     if (!assoc->init)
 517     {
 518         const char *encoding = "UTF-8";
 519         Z_External *ce;
 520         bend_initresult *binitres;
 521
 522         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 523         assoc_init_reset(assoc);
 524
 525         if (sr->username)
 526         {
 527             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 528                 odr_malloc(assoc->decode, sizeof(*auth));
 529             size_t len;
 530
 531             len = strlen(sr->username) + 1;
 532             if (sr->password)
 533                 len += strlen(sr->password) + 2;
 534             auth->which = Z_IdAuthentication_open;
 535             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 536             strcpy(auth->u.open, sr->username);
 537             if (sr->password && *sr->password)
 538             {
 539                 strcat(auth->u.open, "/");
 540                 strcat(auth->u.open, sr->password);
 541             }
 542             assoc->init->auth = auth;
 543         }
 544
 545 #if 1
 546         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 547         assoc->init->charneg_request = ce->u.charNeg3;
 548 #endif
 549         assoc->backend = 0;
 550         if (!(binitres = (*cb->bend_init)(assoc->init)))
 551         {
 552             assoc->state = ASSOC_DEAD;
 553             yaz_add_srw_diagnostic(assoc->encode, d, num,
 554                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 555             return 0;
 556         }
 557         assoc->backend = binitres->handle;
 558         assoc->init->auth = 0;
 559         if (binitres->errcode)
 560         {
 561             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 562             assoc->state = ASSOC_DEAD;
 563             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 564                                    binitres->errstring);
 565             return 0;
 566         }
 567         return 1;
 568     }
 569     return 1;
 570 }
 571
 572 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 573 {
 574 #if YAZ_HAVE_XML2
 575     yaz_record_conv_t rc = 0;
 576     const char *match_schema = 0;
 577     Odr_oid *match_syntax = 0;
 578
 579     if (assoc->server)
 580     {
 581         int r;
 582         const char *input_schema = yaz_get_esn(rr->comp);
 583         Odr_oid *input_syntax_raw = rr->request_format;
 584
 585         const char *backend_schema = 0;
 586         Odr_oid *backend_syntax = 0;
 587
 588         r = yaz_retrieval_request(assoc->server->retrieval,
 589                                   input_schema,
 590                                   input_syntax_raw,
 591                                   &match_schema,
 592                                   &match_syntax,
 593                                   &rc,
 594                                   &backend_schema,
 595                                   &backend_syntax);
 596         if (r == -1) /* error ? */
 597         {
 598             const char *details = yaz_retrieval_get_error(
 599                 assoc->server->retrieval);
 600
 601             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 602             if (details)
 603                 rr->errstring = odr_strdup(rr->stream, details);
 604             return -1;
 605         }
 606         else if (r == 1 || r == 3)
 607         {
 608             const char *details = input_schema;
 609             rr->errcode =
 610                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 611             if (details)
 612                 rr->errstring = odr_strdup(rr->stream, details);
 613             return -1;
 614         }
 615         else if (r == 2)
 616         {
 617             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 618             if (input_syntax_raw)
 619             {
 620                 char oidbuf[OID_STR_MAX];
 621                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 622                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 623             }
 624             return -1;
 625         }
 626         if (backend_schema)
 627         {
 628             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 629         }
 630         if (backend_syntax)
 631             rr->request_format = backend_syntax;
 632     }
 633     (*assoc->init->bend_fetch)(assoc->backend, rr);
 634     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 635     {   /* post conversion must take place .. */
 636         WRBUF output_record = wrbuf_alloc();
 637         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 638         if (r)
 639         {
 640             const char *details = yaz_record_conv_get_error(rc);
 641             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 642             if (details)
 643                 rr->errstring = odr_strdup(rr->stream, details);
 644         }
 645         else
 646         {
 647             rr->len = wrbuf_len(output_record);
 648             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 649             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 650         }
 651         wrbuf_destroy(output_record);
 652     }
 653     if (match_syntax)
 654         rr->output_format = match_syntax;
 655     if (match_schema)
 656         rr->schema = odr_strdup(rr->stream, match_schema);
 657 #else
 658     (*assoc->init->bend_fetch)(assoc->backend, rr);
 659 #endif
 660     return 0;
 661 }
 662
 663 static int srw_bend_fetch(association *assoc, int pos,
 664                           Z_SRW_searchRetrieveRequest *srw_req,
 665                           Z_SRW_record *record,
 666                           const char **addinfo)
 667 {
 668     bend_fetch_rr rr;
 669     ODR o = assoc->encode;
 670
 671     rr.setname = "default";
 672     rr.number = pos;
 673     rr.referenceId = 0;
 674     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 675
 676     rr.comp = (Z_RecordComposition *)
 677             odr_malloc(assoc->decode, sizeof(*rr.comp));
 678     rr.comp->which = Z_RecordComp_complex;
 679     rr.comp->u.complex = (Z_CompSpec *)
 680             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 681     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 682         odr_malloc(assoc->encode, sizeof(bool_t));
 683     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 684     rr.comp->u.complex->num_dbSpecific = 0;
 685     rr.comp->u.complex->dbSpecific = 0;
 686     rr.comp->u.complex->num_recordSyntax = 0;
 687     rr.comp->u.complex->recordSyntax = 0;
 688
 689     rr.comp->u.complex->generic = (Z_Specification *)
 690             odr_malloc(assoc->decode, sizeof(Z_Specification));
 691
 692     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 693     rr.comp->u.complex->generic->which = Z_Schema_uri;
 694     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 695
 696     /* ESN = recordSchema if recordSchema is present */
 697     rr.comp->u.complex->generic->elementSpec = 0;
 698     if (srw_req->recordSchema)
 699     {
 700         rr.comp->u.complex->generic->elementSpec =
 701             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 702         rr.comp->u.complex->generic->elementSpec->which =
 703             Z_ElementSpec_elementSetName;
 704         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 705             srw_req->recordSchema;
 706     }
 707
 708     rr.stream = assoc->encode;
 709     rr.print = assoc->print;
 710
 711     rr.basename = 0;
 712     rr.len = 0;
 713     rr.record = 0;
 714     rr.last_in_set = 0;
 715     rr.errcode = 0;
 716     rr.errstring = 0;
 717     rr.surrogate_flag = 0;
 718     rr.schema = srw_req->recordSchema;
 719
 720     if (!assoc->init->bend_fetch)
 721         return 1;
 722
 723     retrieve_fetch(assoc, &rr);
 724
 725     if (rr.errcode && rr.surrogate_flag)
 726     {
 727         int code = yaz_diag_bib1_to_srw(rr.errcode);
 728         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 729         return 0;
 730     }
 731     else if (rr.len >= 0)
 732     {
 733         record->recordData_buf = rr.record;
 734         record->recordData_len = rr.len;
 735         record->recordPosition = odr_intdup(o, pos);
 736         record->recordSchema = odr_strdup_null(
 737             o, rr.schema ? rr.schema : srw_req->recordSchema);
 738     }
 739     if (rr.errcode)
 740     {
 741         *addinfo = rr.errstring;
 742         return rr.errcode;
 743     }
 744     return 0;
 745 }
 746
 747 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 748                    Z_Query *query_result)
 749 {
 750     /* have a CQL query and  CQL to PQF transform .. */
 751     CQL_parser cp = cql_parser_create();
 752     int r;
 753     int srw_errcode = 0;
 754     const char *add = 0;
 755     char rpn_buf[5120];
 756
 757     r = cql_parser_string(cp, cql);
 758     if (r)
 759     {
 760         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 761     }
 762     if (!r)
 763     {
 764         /* Syntax OK */
 765         r = cql_transform_buf(ct,
 766                               cql_parser_result(cp),
 767                               rpn_buf, sizeof(rpn_buf)-1);
 768         if (r)
 769             srw_errcode = cql_transform_error(ct, &add);
 770     }
 771     if (!r)
 772     {
 773         /* Syntax & transform OK. */
 774         /* Convert PQF string to Z39.50 to RPN query struct */
 775         YAZ_PQF_Parser pp = yaz_pqf_create();
 776         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 777         if (!rpnquery)
 778         {
 779             size_t off;
 780             const char *pqf_msg;
 781             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 782             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 783                     pqf_msg, code);
 784             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 785         }
 786         else
 787         {
 788             query_result->which = Z_Query_type_1;
 789             query_result->u.type_1 = rpnquery;
 790         }
 791         yaz_pqf_destroy(pp);
 792     }
 793     cql_parser_destroy(cp);
 794     return srw_errcode;
 795 }
 796
 797 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 798                         Z_AttributesPlusTerm *result)
 799 {
 800     Z_Query query;
 801     Z_RPNQuery *rpn;
 802     int srw_error = cql2pqf(odr, cql, ct, &query);
 803     if (srw_error)
 804         return srw_error;
 805     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 806         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 807     rpn = query.u.type_1;
 808     if (!rpn->RPNStructure)
 809         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 810     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 811         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 812     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 813         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 814     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 815            sizeof(*result));
 816     return 0;
 817 }
 818
 819
 820 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 821                    bend_search_rr *bsrr)
 822 {
 823     char *ccl0;
 824     struct ccl_rpn_node *node;
 825     int errcode, pos;
 826
 827     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 828     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0)
 829     {
 830         bsrr->errstring = (char*) ccl_err_msg(errcode);
 831         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 832     }
 833
 834     bsrr->query->which = Z_Query_type_1;
 835     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 836     return 0;
 837 }
 838
 839 static int odr_int_to_int(Odr_int v)
 840 {
 841     if (v >= INT_MAX)
 842         return INT_MAX;
 843     else if (v <= INT_MIN)
 844         return INT_MIN;
 845     else return v;
 846 }
 847
 848 static void srw_bend_search(association *assoc, request *req,
 849                             Z_SRW_PDU *sr,
 850                             Z_SRW_PDU *res,
 851                             int *http_code)
 852 {
 853     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 854     int srw_error = 0;
 855     Z_External *ext;
 856     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 857
 858     *http_code = 200;
 859     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 860     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 861     if (srw_res->num_diagnostics == 0 && assoc->init)
 862     {
 863         bend_search_rr rr;
 864         rr.setname = "default";
 865         rr.replace_set = 1;
 866         rr.num_bases = 1;
 867         rr.basenames = &srw_req->database;
 868         rr.referenceId = 0;
 869         rr.srw_sortKeys = 0;
 870         rr.srw_setname = 0;
 871         rr.srw_setnameIdleTime = 0;
 872         rr.estimated_hit_count = 0;
 873         rr.partial_resultset = 0;
 874         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 875         rr.query->u.type_1 = 0;
 876         rr.extra_args = sr->extra_args;
 877         rr.extra_response_data = 0;
 878
 879         if (srw_req->query_type == Z_SRW_query_type_cql)
 880         {
 881             if (assoc->server && assoc->server->cql_transform)
 882             {
 883                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 884                                           assoc->server->cql_transform,
 885                                           rr.query);
 886                 if (srw_errcode)
 887                 {
 888                     yaz_add_srw_diagnostic(assoc->encode,
 889                                            &srw_res->diagnostics,
 890                                            &srw_res->num_diagnostics,
 891                                            srw_errcode, 0);
 892                 }
 893             }
 894             else
 895             {
 896                 /* CQL query to backend. Wrap it - Z39.50 style */
 897                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 898                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 899                                                         "1.2.840.10003.16.2");
 900                 ext->indirect_reference = 0;
 901                 ext->descriptor = 0;
 902                 ext->which = Z_External_CQL;
 903                 ext->u.cql = srw_req->query.cql;
 904
 905                 rr.query->which = Z_Query_type_104;
 906                 rr.query->u.type_104 =  ext;
 907             }
 908         }
 909         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 910         {
 911             Z_RPNQuery *RPNquery;
 912             YAZ_PQF_Parser pqf_parser;
 913
 914             pqf_parser = yaz_pqf_create();
 915
 916             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode,
 917                                      srw_req->query.pqf);
 918             if (!RPNquery)
 919             {
 920                 const char *pqf_msg;
 921                 size_t off;
 922                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 923                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 924                         code, pqf_msg, (long) off);
 925                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 926             }
 927
 928             rr.query->which = Z_Query_type_1;
 929             rr.query->u.type_1 =  RPNquery;
 930
 931             yaz_pqf_destroy(pqf_parser);
 932         }
 933         else
 934         {
 935             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 936                                    &srw_res->num_diagnostics,
 937                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 938         }
 939         if (rr.query->u.type_1)
 940         {
 941             rr.stream = assoc->encode;
 942             rr.decode = assoc->decode;
 943             rr.print = assoc->print;
 944             if ( srw_req->sort.sortKeys )
 945                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 946                                              srw_req->sort.sortKeys );
 947             rr.association = assoc;
 948             rr.hits = 0;
 949             rr.errcode = 0;
 950             rr.errstring = 0;
 951             rr.search_info = 0;
 952             yaz_log_zquery_level(log_requestdetail,rr.query);
 953
 954             (assoc->init->bend_search)(assoc->backend, &rr);
 955             if (rr.errcode)
 956             {
 957                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 958                 {
 959                     *http_code = 404;
 960                 }
 961                 else
 962                 {
 963                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
 964                     yaz_add_srw_diagnostic(assoc->encode,
 965                                            &srw_res->diagnostics,
 966                                            &srw_res->num_diagnostics,
 967                                            srw_error, rr.errstring);
 968                 }
 969             }
 970             else
 971             {
 972                 int number = srw_req->maximumRecords ?
 973                     odr_int_to_int(*srw_req->maximumRecords) : 0;
 974                 int start = srw_req->startRecord ?
 975                     odr_int_to_int(*srw_req->startRecord) : 1;
 976
 977                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
 978                         ODR_INT_PRINTF,
 979                         start, number, rr.hits);
 980
 981                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 982                 if (rr.srw_setname)
 983                 {
 984                     srw_res->resultSetId =
 985                         odr_strdup(assoc->encode, rr.srw_setname );
 986                     srw_res->resultSetIdleTime =
 987                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 988                 }
 989
 990                 if (start > rr.hits || start < 1)
 991                 {
 992                     /* if hits<=0 and start=1 we don't return a diagnostic */
 993                     if (start != 1)
 994                         yaz_add_srw_diagnostic(
 995                             assoc->encode,
 996                             &srw_res->diagnostics, &srw_res->num_diagnostics,
 997                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
 998                 }
 999                 else if (number > 0)
1000                 {
1001                     int i;
1002                     int ok = 1;
1003                     if (start + number > rr.hits)
1004                         number = odr_int_to_int(rr.hits) - start + 1;
1005
1006                     /* Call bend_present if defined */
1007                     if (assoc->init->bend_present)
1008                     {
1009                         bend_present_rr *bprr = (bend_present_rr*)
1010                             odr_malloc(assoc->decode, sizeof(*bprr));
1011                         bprr->setname = "default";
1012                         bprr->start = start;
1013                         bprr->number = number;
1014                         if (srw_req->recordSchema)
1015                         {
1016                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1017                                                                             sizeof(*bprr->comp));
1018                             bprr->comp->which = Z_RecordComp_simple;
1019                             bprr->comp->u.simple = (Z_ElementSetNames *)
1020                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1021                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1022                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1023                         }
1024                         else
1025                         {
1026                             bprr->comp = 0;
1027                         }
1028                         bprr->stream = assoc->encode;
1029                         bprr->referenceId = 0;
1030                         bprr->print = assoc->print;
1031                         bprr->association = assoc;
1032                         bprr->errcode = 0;
1033                         bprr->errstring = NULL;
1034                         (*assoc->init->bend_present)(assoc->backend, bprr);
1035
1036                         if (bprr->errcode)
1037                         {
1038                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1039                             yaz_add_srw_diagnostic(assoc->encode,
1040                                                    &srw_res->diagnostics,
1041                                                    &srw_res->num_diagnostics,
1042                                                    srw_error, bprr->errstring);
1043                             ok = 0;
1044                         }
1045                     }
1046
1047                     if (ok)
1048                     {
1049                         int j = 0;
1050                         int packing = Z_SRW_recordPacking_string;
1051                         if (srw_req->recordPacking)
1052                         {
1053                             packing =
1054                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1055                             if (packing == -1)
1056                                 packing = Z_SRW_recordPacking_string;
1057                         }
1058                         srw_res->records = (Z_SRW_record *)
1059                             odr_malloc(assoc->encode,
1060                                        number * sizeof(*srw_res->records));
1061
1062                         srw_res->extra_records = (Z_SRW_extra_record **)
1063                             odr_malloc(assoc->encode,
1064                                        number*sizeof(*srw_res->extra_records));
1065
1066                         for (i = 0; i<number; i++)
1067                         {
1068                             int errcode;
1069                             const char *addinfo = 0;
1070
1071                             srw_res->records[j].recordPacking = packing;
1072                             srw_res->records[j].recordData_buf = 0;
1073                             srw_res->extra_records[j] = 0;
1074                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1075                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1076                                                      srw_res->records + j,
1077                                                      &addinfo);
1078                             if (errcode)
1079                             {
1080                                 yaz_add_srw_diagnostic(assoc->encode,
1081                                                        &srw_res->diagnostics,
1082                                                        &srw_res->num_diagnostics,
1083                                                        yaz_diag_bib1_to_srw(errcode),
1084                                                        addinfo);
1085
1086                                 break;
1087                             }
1088                             if (srw_res->records[j].recordData_buf)
1089                                 j++;
1090                         }
1091                         srw_res->num_records = j;
1092                         if (!j)
1093                             srw_res->records = 0;
1094                     }
1095                 }
1096                 if (rr.extra_response_data)
1097                 {
1098                     res->extraResponseData_buf = rr.extra_response_data;
1099                     res->extraResponseData_len = strlen(rr.extra_response_data);
1100                 }
1101                 if (rr.estimated_hit_count || rr.partial_resultset)
1102                 {
1103                     yaz_add_srw_diagnostic(
1104                         assoc->encode,
1105                         &srw_res->diagnostics,
1106                         &srw_res->num_diagnostics,
1107                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1108                         0);
1109                 }
1110             }
1111         }
1112     }
1113     if (log_request)
1114     {
1115         const char *querystr = "?";
1116         const char *querytype = "?";
1117         WRBUF wr = wrbuf_alloc();
1118
1119         switch (srw_req->query_type)
1120         {
1121         case Z_SRW_query_type_cql:
1122             querytype = "CQL";
1123             querystr = srw_req->query.cql;
1124             break;
1125         case Z_SRW_query_type_pqf:
1126             querytype = "PQF";
1127             querystr = srw_req->query.pqf;
1128             break;
1129         }
1130         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1131         if (srw_res->num_diagnostics)
1132             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1133         else if (*http_code != 200)
1134             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1135         else if (srw_res->numberOfRecords)
1136         {
1137             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1138                          (srw_res->numberOfRecords ?
1139                           *srw_res->numberOfRecords : 0));
1140         }
1141         wrbuf_printf(wr, " %s " ODR_INT_PRINTF " +%d",
1142                      (srw_res->resultSetId ?
1143                       srw_res->resultSetId : "-"),
1144                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1145                      srw_res->num_records);
1146         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1147         wrbuf_destroy(wr);
1148     }
1149 }
1150
1151 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1152 {
1153 #if YAZ_HAVE_XML2
1154     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1155     if (!ptr)
1156         return 0;
1157     for (ptr = ptr->children; ptr; ptr = ptr->next)
1158     {
1159         if (ptr->type != XML_ELEMENT_NODE)
1160             continue;
1161         if (!strcmp((const char *) ptr->name, "explain"))
1162         {
1163             int len;
1164             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1165             xmlChar *buf_out;
1166             char *content;
1167
1168             ptr = xmlCopyNode(ptr, 1);
1169
1170             xmlDocSetRootElement(doc, ptr);
1171
1172             xmlDocDumpMemory(doc, &buf_out, &len);
1173             content = (char*) odr_malloc(rr->stream, 1+len);
1174             memcpy(content, buf_out, len);
1175             content[len] = '\0';
1176
1177             xmlFree(buf_out);
1178             xmlFreeDoc(doc);
1179             rr->explain_buf = content;
1180             return 0;
1181         }
1182     }
1183 #endif
1184     return 0;
1185 }
1186
1187 static void srw_bend_explain(association *assoc, request *req,
1188                              Z_SRW_PDU *sr,
1189                              Z_SRW_explainResponse *srw_res,
1190                              int *http_code)
1191 {
1192     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1193     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1194     *http_code = 404;
1195     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1196     if (assoc->init)
1197     {
1198         bend_explain_rr rr;
1199
1200         rr.stream = assoc->encode;
1201         rr.decode = assoc->decode;
1202         rr.print = assoc->print;
1203         rr.explain_buf = 0;
1204         rr.database = srw_req->database;
1205         if (assoc->server)
1206             rr.server_node_ptr = assoc->server->server_node_ptr;
1207         else
1208             rr.server_node_ptr = 0;
1209         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1210         if (assoc->init->bend_explain)
1211             (*assoc->init->bend_explain)(assoc->backend, &rr);
1212         else
1213             srw_bend_explain_default(assoc->backend, &rr);
1214
1215         if (rr.explain_buf)
1216         {
1217             int packing = Z_SRW_recordPacking_string;
1218             if (srw_req->recordPacking)
1219             {
1220                 packing =
1221                     yaz_srw_str_to_pack(srw_req->recordPacking);
1222                 if (packing == -1)
1223                     packing = Z_SRW_recordPacking_string;
1224             }
1225             srw_res->record.recordSchema = rr.schema;
1226             srw_res->record.recordPacking = packing;
1227             srw_res->record.recordData_buf = rr.explain_buf;
1228             srw_res->record.recordData_len = strlen(rr.explain_buf);
1229             srw_res->record.recordPosition = 0;
1230             *http_code = 200;
1231         }
1232     }
1233 }
1234
1235 static void srw_bend_scan(association *assoc, request *req,
1236                           Z_SRW_PDU *sr,
1237                           Z_SRW_scanResponse *srw_res,
1238                           int *http_code)
1239 {
1240     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1241     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1242
1243     *http_code = 200;
1244     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1245     if (srw_res->num_diagnostics == 0 && assoc->init)
1246     {
1247         struct scan_entry *save_entries;
1248
1249         bend_scan_rr *bsrr = (bend_scan_rr *)
1250             odr_malloc(assoc->encode, sizeof(*bsrr));
1251         bsrr->num_bases = 1;
1252         bsrr->basenames = &srw_req->database;
1253
1254         bsrr->num_entries = srw_req->maximumTerms ?
1255             odr_int_to_int(*srw_req->maximumTerms) : 10;
1256         bsrr->term_position = srw_req->responsePosition ?
1257             *srw_req->responsePosition : 1;
1258
1259         bsrr->errcode = 0;
1260         bsrr->errstring = 0;
1261         bsrr->referenceId = 0;
1262         bsrr->stream = assoc->encode;
1263         bsrr->print = assoc->print;
1264         bsrr->step_size = odr_intdup(assoc->decode, 0);
1265         bsrr->entries = 0;
1266         bsrr->setname = 0;
1267
1268         if (bsrr->num_entries > 0)
1269         {
1270             int i;
1271             bsrr->entries = (struct scan_entry *)
1272                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1273                            bsrr->num_entries);
1274             for (i = 0; i<bsrr->num_entries; i++)
1275             {
1276                 bsrr->entries[i].term = 0;
1277                 bsrr->entries[i].occurrences = 0;
1278                 bsrr->entries[i].errcode = 0;
1279                 bsrr->entries[i].errstring = 0;
1280                 bsrr->entries[i].display_term = 0;
1281             }
1282         }
1283         save_entries = bsrr->entries;  /* save it so we can compare later */
1284
1285         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1286             assoc->init->bend_scan)
1287         {
1288             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1289
1290             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1291                                       &bsrr->attributeset,
1292                                       srw_req->scanClause.pqf);
1293             yaz_pqf_destroy(pqf_parser);
1294             bsrr->scanClause = 0;
1295             ((int (*)(void *, bend_scan_rr *))
1296              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1297         }
1298         else if (srw_req->query_type == Z_SRW_query_type_cql
1299                  && assoc->init->bend_scan && assoc->server
1300                  && assoc->server->cql_transform)
1301         {
1302             int srw_error;
1303             bsrr->scanClause = 0;
1304             bsrr->attributeset = 0;
1305             bsrr->term = (Z_AttributesPlusTerm *)
1306                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1307             srw_error = cql2pqf_scan(assoc->encode,
1308                                      srw_req->scanClause.cql,
1309                                      assoc->server->cql_transform,
1310                                      bsrr->term);
1311             if (srw_error)
1312                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1313                                        &srw_res->num_diagnostics,
1314                                        srw_error, 0);
1315             else
1316             {
1317                 ((int (*)(void *, bend_scan_rr *))
1318                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1319             }
1320         }
1321         else if (srw_req->query_type == Z_SRW_query_type_cql
1322                  && assoc->init->bend_srw_scan)
1323         {
1324             bsrr->term = 0;
1325             bsrr->attributeset = 0;
1326             bsrr->scanClause = srw_req->scanClause.cql;
1327             ((int (*)(void *, bend_scan_rr *))
1328              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1329         }
1330         else
1331         {
1332             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1333                                    &srw_res->num_diagnostics,
1334                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1335         }
1336         if (bsrr->errcode)
1337         {
1338             int srw_error;
1339             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1340             {
1341                 *http_code = 404;
1342                 return;
1343             }
1344             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1345
1346             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1347                                    &srw_res->num_diagnostics,
1348                                    srw_error, bsrr->errstring);
1349         }
1350         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1351         {
1352             int i;
1353             srw_res->terms = (Z_SRW_scanTerm*)
1354                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1355                            bsrr->num_entries);
1356
1357             srw_res->num_terms =  bsrr->num_entries;
1358             for (i = 0; i<bsrr->num_entries; i++)
1359             {
1360                 Z_SRW_scanTerm *t = srw_res->terms + i;
1361                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1362                 t->numberOfRecords =
1363                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1364                 t->displayTerm = 0;
1365                 if (save_entries == bsrr->entries &&
1366                     bsrr->entries[i].display_term)
1367                 {
1368                     /* the entries was _not_ set by the handler. So it's
1369                        safe to test for new member display_term. It is
1370                        NULL'ed by us.
1371                     */
1372                     t->displayTerm = odr_strdup(assoc->encode,
1373                                                 bsrr->entries[i].display_term);
1374                 }
1375                 t->whereInList = 0;
1376             }
1377         }
1378     }
1379     if (log_request)
1380     {
1381         WRBUF wr = wrbuf_alloc();
1382         const char *querytype = 0;
1383         const char *querystr = 0;
1384
1385         switch(srw_req->query_type)
1386         {
1387         case Z_SRW_query_type_pqf:
1388             querytype = "PQF";
1389             querystr = srw_req->scanClause.pqf;
1390             break;
1391         case Z_SRW_query_type_cql:
1392             querytype = "CQL";
1393             querystr = srw_req->scanClause.cql;
1394             break;
1395         default:
1396             querytype = "UNKNOWN";
1397             querystr = "";
1398         }
1399
1400         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1401
1402         if (srw_res->num_diagnostics)
1403             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1404         else if (srw_res->num_terms)
1405             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1406         else
1407             wrbuf_printf(wr, "OK - - ");
1408
1409         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1410                      (srw_req->responsePosition ?
1411                       *srw_req->responsePosition : 1),
1412                      (srw_req->maximumTerms ?
1413                       *srw_req->maximumTerms : 1));
1414         /* there is no step size in SRU/W ??? */
1415         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1416         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1417         wrbuf_destroy(wr);
1418     }
1419
1420 }
1421
1422 static void srw_bend_update(association *assoc, request *req,
1423                             Z_SRW_PDU *sr,
1424                             Z_SRW_updateResponse *srw_res,
1425                             int *http_code)
1426 {
1427     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1428     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1429     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1430     *http_code = 404;
1431     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1432     if (assoc->init)
1433     {
1434         bend_update_rr rr;
1435         Z_SRW_extra_record *extra = srw_req->extra_record;
1436
1437         rr.stream = assoc->encode;
1438         rr.print = assoc->print;
1439         rr.num_bases = 1;
1440         rr.basenames = &srw_req->database;
1441         rr.operation = srw_req->operation;
1442         rr.operation_status = "failed";
1443         rr.record_id = 0;
1444         rr.record_versions = 0;
1445         rr.num_versions = 0;
1446         rr.record_packing = "string";
1447         rr.record_schema = 0;
1448         rr.record_data = 0;
1449         rr.extra_record_data = 0;
1450         rr.extra_request_data = 0;
1451         rr.extra_response_data = 0;
1452         rr.uri = 0;
1453         rr.message = 0;
1454         rr.details = 0;
1455
1456         *http_code = 200;
1457         if (rr.operation == 0)
1458         {
1459             yaz_add_sru_update_diagnostic(
1460                 assoc->encode, &srw_res->diagnostics,
1461                 &srw_res->num_diagnostics,
1462                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1463                 "action" );
1464             return;
1465         }
1466         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1467         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1468         if (!strcmp( rr.operation, "delete"))
1469         {
1470             if (srw_req->record && !srw_req->record->recordSchema)
1471             {
1472                 rr.record_schema = odr_strdup(
1473                     assoc->encode,
1474                     srw_req->record->recordSchema);
1475             }
1476             if (srw_req->record)
1477             {
1478                 rr.record_data = odr_strdupn(
1479                     assoc->encode,
1480                     srw_req->record->recordData_buf,
1481                     srw_req->record->recordData_len );
1482             }
1483             if (extra && extra->extraRecordData_len)
1484             {
1485                 rr.extra_record_data = odr_strdupn(
1486                     assoc->encode,
1487                     extra->extraRecordData_buf,
1488                     extra->extraRecordData_len );
1489             }
1490             if (srw_req->recordId)
1491                 rr.record_id = srw_req->recordId;
1492             else if (extra && extra->recordIdentifier)
1493                 rr.record_id = extra->recordIdentifier;
1494         }
1495         else if (!strcmp(rr.operation, "replace"))
1496         {
1497             if (srw_req->recordId)
1498                 rr.record_id = srw_req->recordId;
1499             else if (extra && extra->recordIdentifier)
1500                 rr.record_id = extra->recordIdentifier;
1501             else
1502             {
1503                 yaz_add_sru_update_diagnostic(
1504                     assoc->encode, &srw_res->diagnostics,
1505                     &srw_res->num_diagnostics,
1506                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1507                     "recordIdentifier");
1508             }
1509             if (!srw_req->record)
1510             {
1511                 yaz_add_sru_update_diagnostic(
1512                     assoc->encode, &srw_res->diagnostics,
1513                     &srw_res->num_diagnostics,
1514                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1515                     "record");
1516             }
1517             else
1518             {
1519                 if (srw_req->record->recordSchema)
1520                     rr.record_schema = odr_strdup(
1521                         assoc->encode, srw_req->record->recordSchema);
1522                 if (srw_req->record->recordData_len )
1523                 {
1524                     rr.record_data = odr_strdupn(assoc->encode,
1525                                                  srw_req->record->recordData_buf,
1526                                                  srw_req->record->recordData_len );
1527                 }
1528                 else
1529                 {
1530                     yaz_add_sru_update_diagnostic(
1531                         assoc->encode, &srw_res->diagnostics,
1532                         &srw_res->num_diagnostics,
1533                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1534                         "recordData" );
1535                 }
1536             }
1537             if (extra && extra->extraRecordData_len)
1538             {
1539                 rr.extra_record_data = odr_strdupn(
1540                     assoc->encode,
1541                     extra->extraRecordData_buf,
1542                     extra->extraRecordData_len );
1543             }
1544         }
1545         else if (!strcmp(rr.operation, "insert"))
1546         {
1547             if (srw_req->recordId)
1548                 rr.record_id = srw_req->recordId;
1549             else if (extra)
1550                 rr.record_id = extra->recordIdentifier;
1551
1552             if (srw_req->record)
1553             {
1554                 if (srw_req->record->recordSchema)
1555                     rr.record_schema = odr_strdup(
1556                         assoc->encode, srw_req->record->recordSchema);
1557
1558                 if (srw_req->record->recordData_len)
1559                     rr.record_data = odr_strdupn(
1560                         assoc->encode,
1561                         srw_req->record->recordData_buf,
1562                         srw_req->record->recordData_len );
1563             }
1564             if (extra && extra->extraRecordData_len)
1565             {
1566                 rr.extra_record_data = odr_strdupn(
1567                     assoc->encode,
1568                     extra->extraRecordData_buf,
1569                     extra->extraRecordData_len );
1570             }
1571         }
1572         else
1573             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1574                                           &srw_res->num_diagnostics,
1575                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1576                                           rr.operation );
1577
1578         if (srw_req->record)
1579         {
1580             const char *pack_str =
1581                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1582             if (pack_str)
1583                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1584         }
1585
1586         if (srw_req->num_recordVersions)
1587         {
1588             rr.record_versions = srw_req->recordVersions;
1589             rr.num_versions = srw_req->num_recordVersions;
1590         }
1591         if (srw_req->extraRequestData_len)
1592         {
1593             rr.extra_request_data = odr_strdupn(assoc->encode,
1594                                                 srw_req->extraRequestData_buf,
1595                                                 srw_req->extraRequestData_len );
1596         }
1597         if (srw_res->num_diagnostics == 0)
1598         {
1599             if ( assoc->init->bend_srw_update)
1600                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1601             else
1602                 yaz_add_sru_update_diagnostic(
1603                     assoc->encode, &srw_res->diagnostics,
1604                     &srw_res->num_diagnostics,
1605                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1606                     "No Update backend handler");
1607         }
1608
1609         if (rr.uri)
1610             yaz_add_srw_diagnostic_uri(assoc->encode,
1611                                        &srw_res->diagnostics,
1612                                        &srw_res->num_diagnostics,
1613                                        rr.uri,
1614                                        rr.message,
1615                                        rr.details);
1616         srw_res->recordId = rr.record_id;
1617         srw_res->operationStatus = rr.operation_status;
1618         srw_res->recordVersions = rr.record_versions;
1619         srw_res->num_recordVersions = rr.num_versions;
1620         if (srw_res->extraResponseData_len)
1621         {
1622             srw_res->extraResponseData_buf = rr.extra_response_data;
1623             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1624         }
1625         if (srw_res->num_diagnostics == 0 && rr.record_data)
1626         {
1627             srw_res->record = yaz_srw_get_record(assoc->encode);
1628             srw_res->record->recordSchema = rr.record_schema;
1629             if (rr.record_packing)
1630             {
1631                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1632
1633                 if (pack == -1)
1634                 {
1635                     pack = Z_SRW_recordPacking_string;
1636                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1637                             rr.record_packing);
1638                 }
1639                 srw_res->record->recordPacking = pack;
1640             }
1641             srw_res->record->recordData_buf = rr.record_data;
1642             srw_res->record->recordData_len = strlen(rr.record_data);
1643             if (rr.extra_record_data)
1644             {
1645                 Z_SRW_extra_record *ex =
1646                     yaz_srw_get_extra_record(assoc->encode);
1647                 srw_res->extra_record = ex;
1648                 ex->extraRecordData_buf = rr.extra_record_data;
1649                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1650             }
1651         }
1652     }
1653 }
1654
1655 /* check if path is OK (1); BAD (0) */
1656 static int check_path(const char *path)
1657 {
1658     if (*path != '/')
1659         return 0;
1660     if (strstr(path, ".."))
1661         return 0;
1662     return 1;
1663 }
1664
1665 static char *read_file(const char *fname, ODR o, size_t *sz)
1666 {
1667     char *buf;
1668     FILE *inf = fopen(fname, "rb");
1669     if (!inf)
1670         return 0;
1671
1672     fseek(inf, 0L, SEEK_END);
1673     *sz = ftell(inf);
1674     rewind(inf);
1675     buf = (char *) odr_malloc(o, *sz);
1676     if (fread(buf, 1, *sz, inf) != *sz)
1677         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1678     fclose(inf);
1679     return buf;
1680 }
1681
1682 static void process_http_request(association *assoc, request *req)
1683 {
1684     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1685     ODR o = assoc->encode;
1686     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1687     Z_SRW_PDU *sr = 0;
1688     Z_SOAP *soap_package = 0;
1689     Z_GDU *p = 0;
1690     char *charset = 0;
1691     Z_HTTP_Response *hres = 0;
1692     int keepalive = 1;
1693     const char *stylesheet = 0; /* for now .. set later */
1694     Z_SRW_diagnostic *diagnostic = 0;
1695     int num_diagnostic = 0;
1696     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1697
1698     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1699     if (!control_association(assoc, host, 0))
1700     {
1701         p = z_get_HTTP_Response(o, 404);
1702         r = 1;
1703     }
1704     if (r == 2 && assoc->server && assoc->server->docpath
1705         && hreq->path[0] == '/'
1706         &&
1707         /* check if path is a proper prefix of documentroot */
1708         strncmp(hreq->path+1, assoc->server->docpath,
1709                 strlen(assoc->server->docpath))
1710         == 0)
1711     {
1712         if (!check_path(hreq->path))
1713         {
1714             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1715             p = z_get_HTTP_Response(o, 404);
1716         }
1717         else
1718         {
1719             size_t content_size = 0;
1720             char *content_buf = read_file(hreq->path+1, o, &content_size);
1721             if (!content_buf)
1722             {
1723                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1724                 p = z_get_HTTP_Response(o, 404);
1725             }
1726             else
1727             {
1728                 const char *ctype = 0;
1729                 yaz_mime_types types = yaz_mime_types_create();
1730
1731                 yaz_mime_types_add(types, "xsl", "application/xml");
1732                 yaz_mime_types_add(types, "xml", "application/xml");
1733                 yaz_mime_types_add(types, "css", "text/css");
1734                 yaz_mime_types_add(types, "html", "text/html");
1735                 yaz_mime_types_add(types, "htm", "text/html");
1736                 yaz_mime_types_add(types, "txt", "text/plain");
1737                 yaz_mime_types_add(types, "js", "application/x-javascript");
1738
1739                 yaz_mime_types_add(types, "gif", "image/gif");
1740                 yaz_mime_types_add(types, "png", "image/png");
1741                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1742                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1743
1744                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1745                 if (!ctype)
1746                 {
1747                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1748                     p = z_get_HTTP_Response(o, 404);
1749                 }
1750                 else
1751                 {
1752                     p = z_get_HTTP_Response(o, 200);
1753                     hres = p->u.HTTP_Response;
1754                     hres->content_buf = content_buf;
1755                     hres->content_len = content_size;
1756                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1757                 }
1758                 yaz_mime_types_destroy(types);
1759             }
1760         }
1761         r = 1;
1762     }
1763
1764     if (r == 2)
1765     {
1766         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1767         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1768     }
1769     if (r == 2)  /* not taken */
1770     {
1771         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1772                            &diagnostic, &num_diagnostic);
1773         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1774     }
1775     if (r == 0)  /* decode SRW/SRU OK .. */
1776     {
1777         int http_code = 200;
1778         if (sr->which == Z_SRW_searchRetrieve_request)
1779         {
1780             Z_SRW_PDU *res =
1781                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1782                                 sr->srw_version);
1783             stylesheet = sr->u.request->stylesheet;
1784             if (num_diagnostic)
1785             {
1786                 res->u.response->diagnostics = diagnostic;
1787                 res->u.response->num_diagnostics = num_diagnostic;
1788             }
1789             else
1790             {
1791                 srw_bend_search(assoc, req, sr, res, &http_code);
1792             }
1793             if (http_code == 200)
1794                 soap_package->u.generic->p = res;
1795         }
1796         else if (sr->which == Z_SRW_explain_request)
1797         {
1798             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1799                                              sr->srw_version);
1800             stylesheet = sr->u.explain_request->stylesheet;
1801             if (num_diagnostic)
1802             {
1803                 res->u.explain_response->diagnostics = diagnostic;
1804                 res->u.explain_response->num_diagnostics = num_diagnostic;
1805             }
1806             srw_bend_explain(assoc, req, sr,
1807                              res->u.explain_response, &http_code);
1808             if (http_code == 200)
1809                 soap_package->u.generic->p = res;
1810         }
1811         else if (sr->which == Z_SRW_scan_request)
1812         {
1813             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1814                                              sr->srw_version);
1815             stylesheet = sr->u.scan_request->stylesheet;
1816             if (num_diagnostic)
1817             {
1818                 res->u.scan_response->diagnostics = diagnostic;
1819                 res->u.scan_response->num_diagnostics = num_diagnostic;
1820             }
1821             srw_bend_scan(assoc, req, sr,
1822                           res->u.scan_response, &http_code);
1823             if (http_code == 200)
1824                 soap_package->u.generic->p = res;
1825         }
1826         else if (sr->which == Z_SRW_update_request)
1827         {
1828             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1829                                              sr->srw_version);
1830             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1831             if (num_diagnostic)
1832             {
1833                 res->u.update_response->diagnostics = diagnostic;
1834                 res->u.update_response->num_diagnostics = num_diagnostic;
1835             }
1836             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1837             srw_bend_update(assoc, req, sr,
1838                             res->u.update_response, &http_code);
1839             if (http_code == 200)
1840                 soap_package->u.generic->p = res;
1841         }
1842         else
1843         {
1844             yaz_log(log_request, "SOAP ERROR");
1845             /* FIXME - what error, what query */
1846             http_code = 500;
1847             z_soap_error(assoc->encode, soap_package,
1848                          "SOAP-ENV:Client", "Bad method", 0);
1849         }
1850         if (http_code == 200 || http_code == 500)
1851         {
1852             static Z_SOAP_Handler soap_handlers[4] = {
1853 #if YAZ_HAVE_XML2
1854                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1855                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1856                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1857 #endif
1858                 {0, 0, 0}
1859             };
1860             char ctype[80];
1861             int ret;
1862             p = z_get_HTTP_Response(o, 200);
1863             hres = p->u.HTTP_Response;
1864
1865             if (!stylesheet && assoc->server)
1866                 stylesheet = assoc->server->stylesheet;
1867
1868             /* empty stylesheet means NO stylesheet */
1869             if (stylesheet && *stylesheet == '\0')
1870                 stylesheet = 0;
1871
1872             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1873                                        &hres->content_buf, &hres->content_len,
1874                                        soap_handlers, charset, stylesheet);
1875             hres->code = http_code;
1876
1877             strcpy(ctype, "text/xml");
1878             if (charset && strlen(charset) < sizeof(ctype)-30)
1879             {
1880                 strcat(ctype, "; charset=");
1881                 strcat(ctype, charset);
1882             }
1883             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1884         }
1885         else
1886             p = z_get_HTTP_Response(o, http_code);
1887     }
1888
1889     if (p == 0)
1890         p = z_get_HTTP_Response(o, 500);
1891     hres = p->u.HTTP_Response;
1892     if (!strcmp(hreq->version, "1.0"))
1893     {
1894         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1895         if (v && !strcmp(v, "Keep-Alive"))
1896             keepalive = 1;
1897         else
1898             keepalive = 0;
1899         hres->version = "1.0";
1900     }
1901     else
1902     {
1903         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1904         if (v && !strcmp(v, "close"))
1905             keepalive = 0;
1906         else
1907             keepalive = 1;
1908         hres->version = "1.1";
1909     }
1910     if (!keepalive)
1911     {
1912         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1913         assoc->state = ASSOC_DEAD;
1914         assoc->cs_get_mask = 0;
1915     }
1916     else
1917     {
1918         int t;
1919         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1920
1921         if (alive && isdigit(*(const unsigned char *) alive))
1922             t = atoi(alive);
1923         else
1924             t = 15;
1925         if (t < 0 || t > 3600)
1926             t = 3600;
1927         iochan_settimeout(assoc->client_chan,t);
1928         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1929     }
1930     process_gdu_response(assoc, req, p);
1931 }
1932
1933 static void process_gdu_request(association *assoc, request *req)
1934 {
1935     if (req->gdu_request->which == Z_GDU_Z3950)
1936     {
1937         char *msg = 0;
1938         req->apdu_request = req->gdu_request->u.z3950;
1939         if (process_z_request(assoc, req, &msg) < 0)
1940             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1941     }
1942     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1943         process_http_request(assoc, req);
1944     else
1945     {
1946         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1947     }
1948 }
1949
1950 /*
1951  * Initiate request processing.
1952  */
1953 static int process_z_request(association *assoc, request *req, char **msg)
1954 {
1955     Z_APDU *res;
1956     int retval;
1957
1958     *msg = "Unknown Error";
1959     assert(req && req->state == REQUEST_IDLE);
1960     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1961     {
1962         *msg = "Missing InitRequest";
1963         return -1;
1964     }
1965     switch (req->apdu_request->which)
1966     {
1967     case Z_APDU_initRequest:
1968         res = process_initRequest(assoc, req); break;
1969     case Z_APDU_searchRequest:
1970         res = process_searchRequest(assoc, req); break;
1971     case Z_APDU_presentRequest:
1972         res = process_presentRequest(assoc, req); break;
1973     case Z_APDU_scanRequest:
1974         if (assoc->init->bend_scan)
1975             res = process_scanRequest(assoc, req);
1976         else
1977         {
1978             *msg = "Cannot handle Scan APDU";
1979             return -1;
1980         }
1981         break;
1982     case Z_APDU_extendedServicesRequest:
1983         if (assoc->init->bend_esrequest)
1984             res = process_ESRequest(assoc, req);
1985         else
1986         {
1987             *msg = "Cannot handle Extended Services APDU";
1988             return -1;
1989         }
1990         break;
1991     case Z_APDU_sortRequest:
1992         if (assoc->init->bend_sort)
1993             res = process_sortRequest(assoc, req);
1994         else
1995         {
1996             *msg = "Cannot handle Sort APDU";
1997             return -1;
1998         }
1999         break;
2000     case Z_APDU_close:
2001         process_close(assoc, req);
2002         return 0;
2003     case Z_APDU_deleteResultSetRequest:
2004         if (assoc->init->bend_delete)
2005             res = process_deleteRequest(assoc, req);
2006         else
2007         {
2008             *msg = "Cannot handle Delete APDU";
2009             return -1;
2010         }
2011         break;
2012     case Z_APDU_segmentRequest:
2013         if (assoc->init->bend_segment)
2014         {
2015             res = process_segmentRequest(assoc, req);
2016         }
2017         else
2018         {
2019             *msg = "Cannot handle Segment APDU";
2020             return -1;
2021         }
2022         break;
2023     case Z_APDU_triggerResourceControlRequest:
2024         return 0;
2025     default:
2026         *msg = "Bad APDU received";
2027         return -1;
2028     }
2029     if (res)
2030     {
2031         yaz_log(YLOG_DEBUG, "  result immediately available");
2032         retval = process_z_response(assoc, req, res);
2033     }
2034     else
2035     {
2036         yaz_log(YLOG_DEBUG, "  result unavailble");
2037         retval = -1;
2038     }
2039     return retval;
2040 }
2041
2042 /*
2043  * Encode response, and transfer the request structure to the outgoing queue.
2044  */
2045 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2046 {
2047     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2048
2049     if (assoc->print)
2050     {
2051         if (!z_GDU(assoc->print, &res, 0, 0))
2052             yaz_log(YLOG_WARN, "ODR print error: %s",
2053                 odr_errmsg(odr_geterror(assoc->print)));
2054         odr_reset(assoc->print);
2055     }
2056     if (!z_GDU(assoc->encode, &res, 0, 0))
2057     {
2058         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2059                 odr_errmsg(odr_geterror(assoc->decode)),
2060                 odr_getelement(assoc->decode));
2061         return -1;
2062     }
2063     req->response = odr_getbuf(assoc->encode, &req->len_response,
2064         &req->size_response);
2065     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2066     odr_reset(assoc->encode);
2067     req->state = REQUEST_IDLE;
2068     request_enq(&assoc->outgoing, req);
2069     /* turn the work over to the ir_session handler */
2070     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2071     assoc->cs_put_mask = EVENT_OUTPUT;
2072     /* Is there more work to be done? give that to the input handler too */
2073     for (;;)
2074     {
2075         req = request_head(&assoc->incoming);
2076         if (req && req->state == REQUEST_IDLE)
2077         {
2078             request_deq(&assoc->incoming);
2079             process_gdu_request(assoc, req);
2080         }
2081         else
2082             break;
2083     }
2084     return 0;
2085 }
2086
2087 /*
2088  * Encode response, and transfer the request structure to the outgoing queue.
2089  */
2090 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2091 {
2092     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2093     gres->which = Z_GDU_Z3950;
2094     gres->u.z3950 = res;
2095
2096     return process_gdu_response(assoc, req, gres);
2097 }
2098
2099 static char *get_vhost(Z_OtherInformation *otherInfo)
2100 {
2101     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2102 }
2103
2104 /*
2105  * Handle init request.
2106  * At the moment, we don't check the options
2107  * anywhere else in the code - we just try not to do anything that would
2108  * break a naive client. We'll toss 'em into the association block when
2109  * we need them there.
2110  */
2111 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2112 {
2113     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2114     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2115     Z_InitResponse *resp = apdu->u.initResponse;
2116     bend_initresult *binitres;
2117     char options[140];
2118     statserv_options_block *cb = 0;  /* by default no control for backend */
2119
2120     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2121         cb = statserv_getcontrol();  /* got control block for backend */
2122
2123     if (cb && assoc->backend)
2124         (*cb->bend_close)(assoc->backend);
2125
2126     yaz_log(log_requestdetail, "Got initRequest");
2127     if (req->implementationId)
2128         yaz_log(log_requestdetail, "Id:        %s",
2129                 req->implementationId);
2130     if (req->implementationName)
2131         yaz_log(log_requestdetail, "Name:      %s",
2132                 req->implementationName);
2133     if (req->implementationVersion)
2134         yaz_log(log_requestdetail, "Version:   %s",
2135                 req->implementationVersion);
2136
2137     assoc_init_reset(assoc);
2138
2139     assoc->init->auth = req->idAuthentication;
2140     assoc->init->referenceId = req->referenceId;
2141
2142     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2143     {
2144         Z_CharSetandLanguageNegotiation *negotiation =
2145             yaz_get_charneg_record (req->otherInfo);
2146         if (negotiation &&
2147             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2148             assoc->init->charneg_request = negotiation;
2149     }
2150
2151     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2152     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2153         assoc->init->named_result_sets = 1;
2154
2155     assoc->backend = 0;
2156     if (cb)
2157     {
2158         if (req->implementationVersion)
2159             yaz_log(log_requestdetail, "Config:    %s",
2160                     cb->configname);
2161
2162         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2163
2164         /* we have a backend control block, so call that init function */
2165         if (!(binitres = (*cb->bend_init)(assoc->init)))
2166         {
2167             yaz_log(YLOG_WARN, "Bad response from backend.");
2168             return 0;
2169         }
2170         assoc->backend = binitres->handle;
2171     }
2172     else
2173     {
2174         /* no backend. return error */
2175         binitres = (bend_initresult *)
2176             odr_malloc(assoc->encode, sizeof(*binitres));
2177         binitres->errstring = 0;
2178         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2179         iochan_settimeout(assoc->client_chan, 10);
2180     }
2181     if ((assoc->init->bend_sort))
2182         yaz_log(YLOG_DEBUG, "Sort handler installed");
2183     if ((assoc->init->bend_search))
2184         yaz_log(YLOG_DEBUG, "Search handler installed");
2185     if ((assoc->init->bend_present))
2186         yaz_log(YLOG_DEBUG, "Present handler installed");
2187     if ((assoc->init->bend_esrequest))
2188         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2189     if ((assoc->init->bend_delete))
2190         yaz_log(YLOG_DEBUG, "Delete handler installed");
2191     if ((assoc->init->bend_scan))
2192         yaz_log(YLOG_DEBUG, "Scan handler installed");
2193     if ((assoc->init->bend_segment))
2194         yaz_log(YLOG_DEBUG, "Segment handler installed");
2195
2196     resp->referenceId = req->referenceId;
2197     *options = '\0';
2198     /* let's tell the client what we can do */
2199     if (ODR_MASK_GET(req->options, Z_Options_search))
2200     {
2201         ODR_MASK_SET(resp->options, Z_Options_search);
2202         strcat(options, "srch");
2203     }
2204     if (ODR_MASK_GET(req->options, Z_Options_present))
2205     {
2206         ODR_MASK_SET(resp->options, Z_Options_present);
2207         strcat(options, " prst");
2208     }
2209     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2210         assoc->init->bend_delete)
2211     {
2212         ODR_MASK_SET(resp->options, Z_Options_delSet);
2213         strcat(options, " del");
2214     }
2215     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2216         assoc->init->bend_esrequest)
2217     {
2218         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2219         strcat(options, " extendedServices");
2220     }
2221     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2222         && assoc->init->named_result_sets)
2223     {
2224         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2225         strcat(options, " namedresults");
2226     }
2227     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2228     {
2229         ODR_MASK_SET(resp->options, Z_Options_scan);
2230         strcat(options, " scan");
2231     }
2232     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2233     {
2234         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2235         strcat(options, " concurrop");
2236     }
2237     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2238     {
2239         ODR_MASK_SET(resp->options, Z_Options_sort);
2240         strcat(options, " sort");
2241     }
2242
2243     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2244     {
2245         Z_OtherInformationUnit *p0;
2246
2247         if (!assoc->init->charneg_response)
2248         {
2249             if (assoc->init->query_charset)
2250             {
2251                 assoc->init->charneg_response = yaz_set_response_charneg(
2252                     assoc->encode, assoc->init->query_charset, 0,
2253                     assoc->init->records_in_same_charset);
2254             }
2255             else
2256             {
2257                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2258             }
2259         }
2260         if (assoc->init->charneg_response
2261             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2262         {
2263             p0->which = Z_OtherInfo_externallyDefinedInfo;
2264             p0->information.externallyDefinedInfo =
2265                 assoc->init->charneg_response;
2266             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2267             strcat(options, " negotiation");
2268         }
2269     }
2270     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2271         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2272
2273     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2274     {
2275         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2276         assoc->version = 1; /* 1 & 2 are equivalent */
2277     }
2278     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2279     {
2280         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2281         assoc->version = 2;
2282     }
2283     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2284     {
2285         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2286         assoc->version = 3;
2287     }
2288
2289     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2290
2291     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2292         assoc->maximumRecordSize = *req->maximumRecordSize;
2293
2294     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2295         assoc->preferredMessageSize = *req->preferredMessageSize;
2296
2297     resp->preferredMessageSize =
2298         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2299     resp->maximumRecordSize =
2300         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2301
2302     resp->implementationId = odr_prepend(assoc->encode,
2303                 assoc->init->implementation_id,
2304                 resp->implementationId);
2305
2306     resp->implementationName = odr_prepend(assoc->encode,
2307                 assoc->init->implementation_name,
2308                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2309
2310     if (binitres->errcode)
2311     {
2312         assoc->state = ASSOC_DEAD;
2313         resp->userInformationField =
2314             init_diagnostics(assoc->encode, binitres->errcode,
2315                              binitres->errstring);
2316         *resp->result = 0;
2317     }
2318     else
2319         assoc->state = ASSOC_UP;
2320
2321     if (log_request)
2322     {
2323         if (!req->idAuthentication)
2324             yaz_log(log_request, "Auth none");
2325         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2326         {
2327             const char *open = req->idAuthentication->u.open;
2328             const char *slash = strchr(open, '/');
2329             int len;
2330             if (slash)
2331                 len = slash - open;
2332             else
2333                 len = strlen(open);
2334                 yaz_log(log_request, "Auth open %.*s", len, open);
2335         }
2336         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2337         {
2338             const char *user = req->idAuthentication->u.idPass->userId;
2339             const char *group = req->idAuthentication->u.idPass->groupId;
2340             yaz_log(log_request, "Auth idPass %s %s",
2341                     user ? user : "-", group ? group : "-");
2342         }
2343         else if (req->idAuthentication->which
2344                  == Z_IdAuthentication_anonymous)
2345         {
2346             yaz_log(log_request, "Auth anonymous");
2347         }
2348         else
2349         {
2350             yaz_log(log_request, "Auth other");
2351         }
2352     }
2353     if (log_request)
2354     {
2355         WRBUF wr = wrbuf_alloc();
2356         wrbuf_printf(wr, "Init ");
2357         if (binitres->errcode)
2358             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2359         else
2360             wrbuf_printf(wr, "OK -");
2361         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2362                      (req->implementationId ? req->implementationId :"-"),
2363                      (req->implementationName ?
2364                       req->implementationName : "-"),
2365                      (req->implementationVersion ?
2366                       req->implementationVersion : "-")
2367             );
2368         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2369         wrbuf_destroy(wr);
2370     }
2371     return apdu;
2372 }
2373
2374 /*
2375  * Set the specified `errcode' and `errstring' into a UserInfo-1
2376  * external to be returned to the client in accordance with Z35.90
2377  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2378  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2379  */
2380 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2381 {
2382     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2383         addinfo ? " -- " : "", addinfo ? addinfo : "");
2384     return zget_init_diagnostics(odr, error, addinfo);
2385 }
2386
2387 /*
2388  * nonsurrogate diagnostic record.
2389  */
2390 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2391 {
2392     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2393
2394     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2395             addinfo ? " -- " : "", addinfo ? addinfo : "");
2396
2397     rec->which = Z_Records_NSD;
2398     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2399                                                            error, addinfo);
2400     return rec;
2401 }
2402
2403 /*
2404  * surrogate diagnostic.
2405  */
2406 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2407                                           const char *dbname,
2408                                           int error, const char *addinfo)
2409 {
2410     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2411             addinfo ? " -- " : "", addinfo ? addinfo : "");
2412     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2413 }
2414
2415 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2416                                Odr_int *num, Z_RecordComposition *comp,
2417                                Odr_int *next, Odr_int *pres,
2418                                Z_ReferenceId *referenceId,
2419                                Odr_oid *oid, int *errcode)
2420 {
2421     int recno, total_length = 0, dumped_records = 0;
2422     int toget = odr_int_to_int(*num);
2423     Z_Records *records =
2424         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2425     Z_NamePlusRecordList *reclist =
2426         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2427     Z_NamePlusRecord **list =
2428         (Z_NamePlusRecord **) odr_malloc(a->encode, sizeof(*list) * toget);
2429
2430     records->which = Z_Records_DBOSD;
2431     records->u.databaseOrSurDiagnostics = reclist;
2432     reclist->num_records = 0;
2433     reclist->records = list;
2434     *pres = Z_PresentStatus_success;
2435     *num = 0;
2436     *next = 0;
2437
2438     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2439     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2440         a->maximumRecordSize);
2441     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2442     {
2443         bend_fetch_rr freq;
2444         Z_NamePlusRecord *thisrec;
2445         int this_length = 0;
2446         /*
2447          * we get the number of bytes allocated on the stream before any
2448          * allocation done by the backend - this should give us a reasonable
2449          * idea of the total size of the data so far.
2450          */
2451         total_length = odr_total(a->encode) - dumped_records;
2452         freq.errcode = 0;
2453         freq.errstring = 0;
2454         freq.basename = 0;
2455         freq.len = 0;
2456         freq.record = 0;
2457         freq.last_in_set = 0;
2458         freq.setname = setname;
2459         freq.surrogate_flag = 0;
2460         freq.number = recno;
2461         freq.comp = comp;
2462         freq.request_format = oid;
2463         freq.output_format = 0;
2464         freq.stream = a->encode;
2465         freq.print = a->print;
2466         freq.referenceId = referenceId;
2467         freq.schema = 0;
2468
2469         retrieve_fetch(a, &freq);
2470
2471         *next = freq.last_in_set ? 0 : recno + 1;
2472
2473         if (freq.errcode)
2474         {
2475             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2476             {
2477                 char s[20];
2478                 *pres = Z_PresentStatus_failure;
2479                 /* for 'present request out of range',
2480                    set addinfo to record position if not set */
2481                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2482                                 freq.errstring == 0)
2483                 {
2484                     sprintf(s, "%d", recno);
2485                     freq.errstring = s;
2486                 }
2487                 if (errcode)
2488                     *errcode = freq.errcode;
2489                 return diagrec(a, freq.errcode, freq.errstring);
2490             }
2491             reclist->records[reclist->num_records] =
2492                 surrogatediagrec(a, freq.basename, freq.errcode,
2493                                  freq.errstring);
2494             reclist->num_records++;
2495             continue;
2496         }
2497         if (freq.record == 0)  /* no error and no record ? */
2498         {
2499             *next = 0;   /* signal end-of-set and stop */
2500             break;
2501         }
2502         if (freq.len >= 0)
2503             this_length = freq.len;
2504         else
2505             this_length = odr_total(a->encode) - total_length - dumped_records;
2506         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2507             this_length, total_length, dumped_records);
2508         if (a->preferredMessageSize > 0 &&
2509                 this_length + total_length > a->preferredMessageSize)
2510         {
2511             /* record is small enough, really */
2512             if (this_length <= a->preferredMessageSize && recno > start)
2513             {
2514                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2515                 *pres = Z_PresentStatus_partial_2;
2516                 break;
2517             }
2518             /* record can only be fetched by itself */
2519             if (this_length < a->maximumRecordSize)
2520             {
2521                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2522                 if (toget > 1)
2523                 {
2524                     yaz_log(YLOG_DEBUG, "  Dropped it");
2525                     reclist->records[reclist->num_records] =
2526                          surrogatediagrec(a, freq.basename, 16, 0);
2527                     reclist->num_records++;
2528                     dumped_records += this_length;
2529                     continue;
2530                 }
2531             }
2532             else /* too big entirely */
2533             {
2534                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2535                         "this=%d max=%d",
2536                         this_length, a->maximumRecordSize);
2537                 reclist->records[reclist->num_records] =
2538                     surrogatediagrec(a, freq.basename, 17, 0);
2539                 reclist->num_records++;
2540                 dumped_records += this_length;
2541                 continue;
2542             }
2543         }
2544
2545         if (!(thisrec = (Z_NamePlusRecord *)
2546               odr_malloc(a->encode, sizeof(*thisrec))))
2547             return 0;
2548         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2549         thisrec->which = Z_NamePlusRecord_databaseRecord;
2550
2551         if (!freq.output_format)
2552             freq.output_format = freq.request_format;
2553         thisrec->u.databaseRecord = z_ext_record_oid(
2554             a->encode, freq.output_format, freq.record, freq.len);
2555         if (!thisrec->u.databaseRecord)
2556             return 0;
2557         reclist->records[reclist->num_records] = thisrec;
2558         reclist->num_records++;
2559     }
2560     *num = reclist->num_records;
2561     return records;
2562 }
2563
2564 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2565 {
2566     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2567     bend_search_rr *bsrr =
2568         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2569
2570     yaz_log(log_requestdetail, "Got SearchRequest.");
2571     bsrr->association = assoc;
2572     bsrr->referenceId = req->referenceId;
2573     bsrr->srw_sortKeys = 0;
2574     bsrr->srw_setname = 0;
2575     bsrr->srw_setnameIdleTime = 0;
2576     bsrr->estimated_hit_count = 0;
2577     bsrr->partial_resultset = 0;
2578     bsrr->extra_args = 0;
2579     bsrr->extra_response_data = 0;
2580
2581     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2582     if (req->databaseNames)
2583     {
2584         int i;
2585         for (i = 0; i < req->num_databaseNames; i++)
2586             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2587     }
2588
2589     yaz_log_zquery_level(log_requestdetail,req->query);
2590
2591     if (assoc->init->bend_search)
2592     {
2593         bsrr->setname = req->resultSetName;
2594         bsrr->replace_set = *req->replaceIndicator;
2595         bsrr->num_bases = req->num_databaseNames;
2596         bsrr->basenames = req->databaseNames;
2597         bsrr->query = req->query;
2598         bsrr->stream = assoc->encode;
2599         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2600         bsrr->decode = assoc->decode;
2601         bsrr->print = assoc->print;
2602         bsrr->hits = 0;
2603         bsrr->errcode = 0;
2604         bsrr->errstring = NULL;
2605         bsrr->search_info = NULL;
2606
2607         if (assoc->server && assoc->server->cql_transform
2608             && req->query->which == Z_Query_type_104
2609             && req->query->u.type_104->which == Z_External_CQL)
2610         {
2611             /* have a CQL query and a CQL to PQF transform .. */
2612             int srw_errcode =
2613                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2614                         assoc->server->cql_transform, bsrr->query);
2615             if (srw_errcode)
2616                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2617         }
2618
2619         if (assoc->server && assoc->server->ccl_transform
2620             && req->query->which == Z_Query_type_2) /*CCL*/
2621         {
2622             /* have a CCL query and a CCL to PQF transform .. */
2623             int srw_errcode =
2624                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2625                         assoc->server->ccl_transform, bsrr);
2626             if (srw_errcode)
2627                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2628         }
2629
2630         if (!bsrr->errcode)
2631             (assoc->init->bend_search)(assoc->backend, bsrr);
2632     }
2633     else
2634     {
2635         /* FIXME - make a diagnostic for it */
2636         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2637     }
2638     return response_searchRequest(assoc, reqb, bsrr);
2639 }
2640
2641 /*
2642  * Prepare a searchresponse based on the backend results. We probably want
2643  * to look at making the fetching of records nonblocking as well, but
2644  * so far, we'll keep things simple.
2645  * If bsrt is null, that means we're called in response to a communications
2646  * event, and we'll have to get the response for ourselves.
2647  */
2648 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2649                                       bend_search_rr *bsrt)
2650 {
2651     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2652     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2653     Z_SearchResponse *resp = (Z_SearchResponse *)
2654         odr_malloc(assoc->encode, sizeof(*resp));
2655     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2656     Odr_int *next = odr_intdup(assoc->encode, 0);
2657     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2658     Odr_int returnedrecs = 0;
2659
2660     apdu->which = Z_APDU_searchResponse;
2661     apdu->u.searchResponse = resp;
2662     resp->referenceId = req->referenceId;
2663     resp->additionalSearchInfo = 0;
2664     resp->otherInfo = 0;
2665     if (!bsrt)
2666     {
2667         yaz_log(YLOG_FATAL, "Bad result from backend");
2668         return 0;
2669     }
2670     else if (bsrt->errcode)
2671     {
2672         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2673         resp->resultCount = nulint;
2674         resp->numberOfRecordsReturned = nulint;
2675         resp->nextResultSetPosition = nulint;
2676         resp->searchStatus = odr_booldup(assoc->encode, 0);
2677         resp->resultSetStatus = none;
2678         resp->presentStatus = 0;
2679     }
2680     else
2681     {
2682         bool_t *sr = odr_booldup(assoc->encode, 1);
2683         Odr_int *toget = odr_intdup(assoc->encode, 0);
2684         Z_RecordComposition comp, *compp = 0;
2685
2686         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2687
2688         resp->records = 0;
2689         resp->resultCount = &bsrt->hits;
2690
2691         comp.which = Z_RecordComp_simple;
2692         /* how many records does the user agent want, then? */
2693         if (bsrt->hits < 0)
2694             *toget = 0;
2695         else if (bsrt->hits <= *req->smallSetUpperBound)
2696         {
2697             *toget = bsrt->hits;
2698             if ((comp.u.simple = req->smallSetElementSetNames))
2699                 compp = &comp;
2700         }
2701         else if (bsrt->hits < *req->largeSetLowerBound)
2702         {
2703             *toget = *req->mediumSetPresentNumber;
2704             if (*toget > bsrt->hits)
2705                 *toget = bsrt->hits;
2706             if ((comp.u.simple = req->mediumSetElementSetNames))
2707                 compp = &comp;
2708         }
2709         else
2710             *toget = 0;
2711
2712         if (*toget && !resp->records)
2713         {
2714             Odr_int *presst = odr_intdup(assoc->encode, 0);
2715             /* Call bend_present if defined */
2716             if (assoc->init->bend_present)
2717             {
2718                 bend_present_rr *bprr = (bend_present_rr *)
2719                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2720                 bprr->setname = req->resultSetName;
2721                 bprr->start = 1;
2722                 bprr->number = odr_int_to_int(*toget);
2723                 bprr->format = req->preferredRecordSyntax;
2724                 bprr->comp = compp;
2725                 bprr->referenceId = req->referenceId;
2726                 bprr->stream = assoc->encode;
2727                 bprr->print = assoc->print;
2728                 bprr->association = assoc;
2729                 bprr->errcode = 0;
2730                 bprr->errstring = NULL;
2731                 (*assoc->init->bend_present)(assoc->backend, bprr);
2732
2733                 if (bprr->errcode)
2734                 {
2735                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2736                     *resp->presentStatus = Z_PresentStatus_failure;
2737                 }
2738             }
2739
2740             if (!resp->records)
2741                 resp->records = pack_records(
2742                     assoc, req->resultSetName, 1,
2743                     toget, compp, next, presst, req->referenceId,
2744                     req->preferredRecordSyntax, NULL);
2745             if (!resp->records)
2746                 return 0;
2747             resp->numberOfRecordsReturned = toget;
2748             returnedrecs = *toget;
2749             resp->presentStatus = presst;
2750         }
2751         else
2752         {
2753             if (*resp->resultCount)
2754                 *next = 1;
2755             resp->numberOfRecordsReturned = nulint;
2756             resp->presentStatus = 0;
2757         }
2758         resp->nextResultSetPosition = next;
2759         resp->searchStatus = sr;
2760         resp->resultSetStatus = 0;
2761         if (bsrt->estimated_hit_count)
2762         {
2763             resp->resultSetStatus = odr_intdup(assoc->encode,
2764                                                Z_SearchResponse_estimate);
2765         }
2766         else if (bsrt->partial_resultset)
2767         {
2768             resp->resultSetStatus = odr_intdup(assoc->encode,
2769                                                Z_SearchResponse_subset);
2770         }
2771     }
2772     resp->additionalSearchInfo = bsrt->search_info;
2773
2774     if (log_request)
2775     {
2776         int i;
2777         WRBUF wr = wrbuf_alloc();
2778
2779         for (i = 0 ; i < req->num_databaseNames; i++)
2780         {
2781             if (i)
2782                 wrbuf_printf(wr, "+");
2783             wrbuf_puts(wr, req->databaseNames[i]);
2784         }
2785         wrbuf_printf(wr, " ");
2786
2787         if (bsrt->errcode)
2788             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2789         else
2790             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2791         wrbuf_printf(wr, " %s 1+" ODR_INT_PRINTF " ",
2792                      req->resultSetName, returnedrecs);
2793         yaz_query_to_wrbuf(wr, req->query);
2794
2795         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2796         wrbuf_destroy(wr);
2797     }
2798     return apdu;
2799 }
2800
2801 /*
2802  * Maybe we got a little over-friendly when we designed bend_fetch to
2803  * get only one record at a time. Some backends can optimise multiple-record
2804  * fetches, and at any rate, there is some overhead involved in
2805  * all that selecting and hopping around. Problem is, of course, that the
2806  * frontend can't know ahead of time how many records it'll need to
2807  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2808  * is downright lousy as a bulk data transfer protocol.
2809  *
2810  * To start with, we'll do the fetching of records from the backend
2811  * in one operation: To save some trips in and out of the event-handler,
2812  * and to simplify the interface to pack_records. At any rate, asynch
2813  * operation is more fun in operations that have an unpredictable execution
2814  * speed - which is normally more true for search than for present.
2815  */
2816 static Z_APDU *process_presentRequest(association *assoc, request *reqb)
2817 {
2818     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2819     Z_APDU *apdu;
2820     Z_PresentResponse *resp;
2821     Odr_int *next;
2822     Odr_int *num;
2823     int errcode = 0;
2824     const char *errstring = 0;
2825
2826     yaz_log(log_requestdetail, "Got PresentRequest.");
2827
2828     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2829     resp->records = 0;
2830     resp->presentStatus = odr_intdup(assoc->encode, 0);
2831     if (assoc->init->bend_present)
2832     {
2833         bend_present_rr *bprr = (bend_present_rr *)
2834             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2835         bprr->setname = req->resultSetId;
2836         bprr->start = odr_int_to_int(*req->resultSetStartPoint);
2837         bprr->number = odr_int_to_int(*req->numberOfRecordsRequested);
2838         bprr->format = req->preferredRecordSyntax;
2839         bprr->comp = req->recordComposition;
2840         bprr->referenceId = req->referenceId;
2841         bprr->stream = assoc->encode;
2842         bprr->print = assoc->print;
2843         bprr->association = assoc;
2844         bprr->errcode = 0;
2845         bprr->errstring = NULL;
2846         (*assoc->init->bend_present)(assoc->backend, bprr);
2847
2848         if (bprr->errcode)
2849         {
2850             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2851             *resp->presentStatus = Z_PresentStatus_failure;
2852             errcode = bprr->errcode;
2853             errstring = bprr->errstring;
2854         }
2855     }
2856     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2857     next = odr_intdup(assoc->encode, 0);
2858     num = odr_intdup(assoc->encode, 0);
2859
2860     apdu->which = Z_APDU_presentResponse;
2861     apdu->u.presentResponse = resp;
2862     resp->referenceId = req->referenceId;
2863     resp->otherInfo = 0;
2864
2865     if (!resp->records)
2866     {
2867         *num = *req->numberOfRecordsRequested;
2868         resp->records =
2869             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2870                          num, req->recordComposition, next,
2871                          resp->presentStatus,
2872                          req->referenceId, req->preferredRecordSyntax,
2873                          &errcode);
2874     }
2875     if (log_request)
2876     {
2877         WRBUF wr = wrbuf_alloc();
2878         wrbuf_printf(wr, "Present ");
2879
2880         if (*resp->presentStatus == Z_PresentStatus_failure)
2881             wrbuf_printf(wr, "ERROR %d ", errcode);
2882         else if (*resp->presentStatus == Z_PresentStatus_success)
2883             wrbuf_printf(wr, "OK -  ");
2884         else
2885             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
2886                          *resp->presentStatus);
2887
2888         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
2889                 req->resultSetId, *req->resultSetStartPoint,
2890                 *req->numberOfRecordsRequested);
2891         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2892         wrbuf_destroy(wr);
2893     }
2894     if (!resp->records)
2895         return 0;
2896     resp->numberOfRecordsReturned = num;
2897     resp->nextResultSetPosition = next;
2898
2899     return apdu;
2900 }
2901
2902 /*
2903  * Scan was implemented rather in a hurry, and with support for only the basic
2904  * elements of the service in the backend API. Suggestions are welcome.
2905  */
2906 static Z_APDU *process_scanRequest(association *assoc, request *reqb)
2907 {
2908     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2909     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2910     Z_ScanResponse *res = (Z_ScanResponse *)
2911         odr_malloc(assoc->encode, sizeof(*res));
2912     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2913     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2914     Z_ListEntries *ents = (Z_ListEntries *)
2915         odr_malloc(assoc->encode, sizeof(*ents));
2916     Z_DiagRecs *diagrecs_p = NULL;
2917     bend_scan_rr *bsrr = (bend_scan_rr *)
2918         odr_malloc(assoc->encode, sizeof(*bsrr));
2919     struct scan_entry *save_entries;
2920
2921     yaz_log(log_requestdetail, "Got ScanRequest");
2922
2923     apdu->which = Z_APDU_scanResponse;
2924     apdu->u.scanResponse = res;
2925     res->referenceId = req->referenceId;
2926
2927     /* if step is absent, set it to 0 */
2928     res->stepSize = odr_intdup(assoc->encode, 0);
2929     if (req->stepSize)
2930         *res->stepSize = *req->stepSize;
2931
2932     res->scanStatus = scanStatus;
2933     res->numberOfEntriesReturned = numberOfEntriesReturned;
2934     res->positionOfTerm = 0;
2935     res->entries = ents;
2936     ents->num_entries = 0;
2937     ents->entries = NULL;
2938     ents->num_nonsurrogateDiagnostics = 0;
2939     ents->nonsurrogateDiagnostics = NULL;
2940     res->attributeSet = 0;
2941     res->otherInfo = 0;
2942
2943     if (req->databaseNames)
2944     {
2945         int i;
2946         for (i = 0; i < req->num_databaseNames; i++)
2947             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2948     }
2949     bsrr->scanClause = 0;
2950     bsrr->errcode = 0;
2951     bsrr->errstring = 0;
2952     bsrr->num_bases = req->num_databaseNames;
2953     bsrr->basenames = req->databaseNames;
2954     bsrr->num_entries = odr_int_to_int(*req->numberOfTermsRequested);
2955     bsrr->term = req->termListAndStartPoint;
2956     bsrr->referenceId = req->referenceId;
2957     bsrr->stream = assoc->encode;
2958     bsrr->print = assoc->print;
2959     bsrr->step_size = res->stepSize;
2960     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
2961                                           yaz_oid_userinfo_scan_set, 1, 0);
2962     bsrr->entries = 0;
2963     /* For YAZ 2.0 and earlier it was the backend handler that
2964        initialized entries (member display_term did not exist)
2965        YAZ 2.0 and later sets 'entries'  and initialize all members
2966        including 'display_term'. If YAZ 2.0 or later sees that
2967        entries was modified - we assume that it is an old handler and
2968        that 'display_term' is _not_ set.
2969     */
2970     if (bsrr->num_entries > 0)
2971     {
2972         int i;
2973         bsrr->entries = (struct scan_entry *)
2974             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
2975                        bsrr->num_entries);
2976         for (i = 0; i<bsrr->num_entries; i++)
2977         {
2978             bsrr->entries[i].term = 0;
2979             bsrr->entries[i].occurrences = 0;
2980             bsrr->entries[i].errcode = 0;
2981             bsrr->entries[i].errstring = 0;
2982             bsrr->entries[i].display_term = 0;
2983         }
2984     }
2985     save_entries = bsrr->entries;  /* save it so we can compare later */
2986
2987     bsrr->attributeset = req->attributeSet;
2988     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
2989                         bsrr->attributeset);
2990     bsrr->term_position = req->preferredPositionInResponse ?
2991         *req->preferredPositionInResponse : 1;
2992
2993     ((int (*)(void *, bend_scan_rr *))
2994      (*assoc->init->bend_scan))(assoc->backend, bsrr);
2995
2996     if (bsrr->errcode)
2997         diagrecs_p = zget_DiagRecs(assoc->encode,
2998                                    bsrr->errcode, bsrr->errstring);
2999     else
3000     {
3001         int i;
3002         Z_Entry **tab = (Z_Entry **)
3003             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3004
3005         if (bsrr->status == BEND_SCAN_PARTIAL)
3006             *scanStatus = Z_Scan_partial_5;
3007         else
3008             *scanStatus = Z_Scan_success;
3009         ents->entries = tab;
3010         ents->num_entries = bsrr->num_entries;
3011         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3012                                                    ents->num_entries);
3013         res->positionOfTerm = &bsrr->term_position;
3014         for (i = 0; i < bsrr->num_entries; i++)
3015         {
3016             Z_Entry *e;
3017             Z_TermInfo *t;
3018             Odr_oct *o;
3019
3020             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3021             if (bsrr->entries[i].occurrences >= 0)
3022             {
3023                 e->which = Z_Entry_termInfo;
3024                 e->u.termInfo = t = (Z_TermInfo *)
3025                     odr_malloc(assoc->encode, sizeof(*t));
3026                 t->suggestedAttributes = 0;
3027                 t->displayTerm = 0;
3028                 if (save_entries == bsrr->entries &&
3029                     bsrr->entries[i].display_term)
3030                 {
3031                     /* the entries was _not_ set by the handler. So it's
3032                        safe to test for new member display_term. It is
3033                        NULL'ed by us.
3034                     */
3035                     t->displayTerm = odr_strdup(assoc->encode,
3036                                                 bsrr->entries[i].display_term);
3037                 }
3038                 t->alternativeTerm = 0;
3039                 t->byAttributes = 0;
3040                 t->otherTermInfo = 0;
3041                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3042                 t->term = (Z_Term *)
3043                     odr_malloc(assoc->encode, sizeof(*t->term));
3044                 t->term->which = Z_Term_general;
3045                 t->term->u.general = o =
3046                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3047                 o->buf = (unsigned char *)
3048                     odr_malloc(assoc->encode, o->len = o->size =
3049                                strlen(bsrr->entries[i].term));
3050                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3051                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3052                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3053             }
3054             else
3055             {
3056                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3057                                                   bsrr->entries[i].errcode,
3058                                                   bsrr->entries[i].errstring);
3059                 assert(drecs->num_diagRecs == 1);
3060                 e->which = Z_Entry_surrogateDiagnostic;
3061                 assert(drecs->diagRecs[0]);
3062                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3063             }
3064         }
3065     }
3066     if (diagrecs_p)
3067     {
3068         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3069         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3070     }
3071     if (log_request)
3072     {
3073         int i;
3074         WRBUF wr = wrbuf_alloc();
3075         wrbuf_printf(wr, "Scan ");
3076         for (i = 0 ; i < req->num_databaseNames; i++)
3077         {
3078             if (i)
3079                 wrbuf_printf(wr, "+");
3080             wrbuf_puts(wr, req->databaseNames[i]);
3081         }
3082
3083         wrbuf_printf(wr, " ");
3084
3085         if (bsrr->errcode)
3086             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3087         else
3088             wrbuf_printf(wr, "OK");
3089
3090         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3091                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3092                      res->numberOfEntriesReturned ?
3093                      *res->numberOfEntriesReturned : 0,
3094                      (req->preferredPositionInResponse ?
3095                       *req->preferredPositionInResponse : 1),
3096                      *req->numberOfTermsRequested,
3097                      (res->stepSize ? *res->stepSize : 1));
3098
3099         if (bsrr->setname)
3100             wrbuf_printf(wr, "+%s", bsrr->setname);
3101
3102         wrbuf_printf(wr, " ");
3103         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3104                           bsrr->attributeset);
3105         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3106         wrbuf_destroy(wr);
3107     }
3108     return apdu;
3109 }
3110
3111 static Z_APDU *process_sortRequest(association *assoc, request *reqb)
3112 {
3113     int i;
3114     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3115     Z_SortResponse *res = (Z_SortResponse *)
3116         odr_malloc(assoc->encode, sizeof(*res));
3117     bend_sort_rr *bsrr = (bend_sort_rr *)
3118         odr_malloc(assoc->encode, sizeof(*bsrr));
3119
3120     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3121
3122     yaz_log(log_requestdetail, "Got SortRequest.");
3123
3124     bsrr->num_input_setnames = req->num_inputResultSetNames;
3125     for (i=0;i<req->num_inputResultSetNames;i++)
3126         yaz_log(log_requestdetail, "Input resultset: '%s'",
3127                 req->inputResultSetNames[i]);
3128     bsrr->input_setnames = req->inputResultSetNames;
3129     bsrr->referenceId = req->referenceId;
3130     bsrr->output_setname = req->sortedResultSetName;
3131     yaz_log(log_requestdetail, "Output resultset: '%s'",
3132                 req->sortedResultSetName);
3133     bsrr->sort_sequence = req->sortSequence;
3134        /*FIXME - dump those sequences too */
3135     bsrr->stream = assoc->encode;
3136     bsrr->print = assoc->print;
3137
3138     bsrr->sort_status = Z_SortResponse_failure;
3139     bsrr->errcode = 0;
3140     bsrr->errstring = 0;
3141
3142     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3143
3144     res->referenceId = bsrr->referenceId;
3145     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3146     res->resultSetStatus = 0;
3147     if (bsrr->errcode)
3148     {
3149         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3150                                        bsrr->errcode, bsrr->errstring);
3151         res->diagnostics = dr->diagRecs;
3152         res->num_diagnostics = dr->num_diagRecs;
3153     }
3154     else
3155     {
3156         res->num_diagnostics = 0;
3157         res->diagnostics = 0;
3158     }
3159     res->resultCount = 0;
3160     res->otherInfo = 0;
3161
3162     apdu->which = Z_APDU_sortResponse;
3163     apdu->u.sortResponse = res;
3164     if (log_request)
3165     {
3166         WRBUF wr = wrbuf_alloc();
3167         wrbuf_printf(wr, "Sort ");
3168         if (bsrr->errcode)
3169             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3170         else
3171             wrbuf_printf(wr,  "OK -");
3172         wrbuf_printf(wr, " (");
3173         for (i = 0; i<req->num_inputResultSetNames; i++)
3174         {
3175             if (i)
3176                 wrbuf_printf(wr, "+");
3177             wrbuf_puts(wr, req->inputResultSetNames[i]);
3178         }
3179         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3180
3181         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3182         wrbuf_destroy(wr);
3183     }
3184     return apdu;
3185 }
3186
3187 static Z_APDU *process_deleteRequest(association *assoc, request *reqb)
3188 {
3189     int i;
3190     Z_DeleteResultSetRequest *req =
3191         reqb->apdu_request->u.deleteResultSetRequest;
3192     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3193         odr_malloc(assoc->encode, sizeof(*res));
3194     bend_delete_rr *bdrr = (bend_delete_rr *)
3195         odr_malloc(assoc->encode, sizeof(*bdrr));
3196     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3197
3198     yaz_log(log_requestdetail, "Got DeleteRequest.");
3199
3200     bdrr->num_setnames = req->num_resultSetList;
3201     bdrr->setnames = req->resultSetList;
3202     for (i = 0; i<req->num_resultSetList; i++)
3203         yaz_log(log_requestdetail, "resultset: '%s'",
3204                 req->resultSetList[i]);
3205     bdrr->stream = assoc->encode;
3206     bdrr->print = assoc->print;
3207     bdrr->function = odr_int_to_int(*req->deleteFunction);
3208     bdrr->referenceId = req->referenceId;
3209     bdrr->statuses = 0;
3210     if (bdrr->num_setnames > 0)
3211     {
3212         bdrr->statuses = (Odr_int*)
3213             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3214                        bdrr->num_setnames);
3215         for (i = 0; i < bdrr->num_setnames; i++)
3216             bdrr->statuses[i] = 0;
3217     }
3218     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3219
3220     res->referenceId = req->referenceId;
3221
3222     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3223
3224     res->deleteListStatuses = 0;
3225     if (bdrr->num_setnames > 0)
3226     {
3227         int i;
3228         res->deleteListStatuses = (Z_ListStatuses *)
3229             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3230         res->deleteListStatuses->num = bdrr->num_setnames;
3231         res->deleteListStatuses->elements =
3232             (Z_ListStatus **)
3233             odr_malloc(assoc->encode,
3234                         sizeof(*res->deleteListStatuses->elements) *
3235                         bdrr->num_setnames);
3236         for (i = 0; i<bdrr->num_setnames; i++)
3237         {
3238             res->deleteListStatuses->elements[i] =
3239                 (Z_ListStatus *)
3240                 odr_malloc(assoc->encode,
3241                             sizeof(**res->deleteListStatuses->elements));
3242             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3243             res->deleteListStatuses->elements[i]->id =
3244                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3245         }
3246     }
3247     res->numberNotDeleted = 0;
3248     res->bulkStatuses = 0;
3249     res->deleteMessage = 0;
3250     res->otherInfo = 0;
3251
3252     apdu->which = Z_APDU_deleteResultSetResponse;
3253     apdu->u.deleteResultSetResponse = res;
3254     if (log_request)
3255     {
3256         WRBUF wr = wrbuf_alloc();
3257         wrbuf_printf(wr, "Delete ");
3258         if (bdrr->delete_status)
3259             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3260         else
3261             wrbuf_printf(wr, "OK -");
3262         for (i = 0; i<req->num_resultSetList; i++)
3263             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3264         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3265         wrbuf_destroy(wr);
3266     }
3267     return apdu;
3268 }
3269
3270 static void process_close(association *assoc, request *reqb)
3271 {
3272     Z_Close *req = reqb->apdu_request->u.close;
3273     static char *reasons[] =
3274     {
3275         "finished",
3276         "shutdown",
3277         "systemProblem",
3278         "costLimit",
3279         "resources",
3280         "securityViolation",
3281         "protocolError",
3282         "lackOfActivity",
3283         "peerAbort",
3284         "unspecified"
3285     };
3286
3287     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3288         reasons[*req->closeReason], req->diagnosticInformation ?
3289         req->diagnosticInformation : "NULL");
3290     if (assoc->version < 3) /* to make do_force respond with close */
3291         assoc->version = 3;
3292     do_close_req(assoc, Z_Close_finished,
3293                  "Association terminated by client", reqb);
3294     yaz_log(log_request,"Close OK");
3295 }
3296
3297 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3298 {
3299     bend_segment_rr req;
3300
3301     req.segment = reqb->apdu_request->u.segmentRequest;
3302     req.stream = assoc->encode;
3303     req.decode = assoc->decode;
3304     req.print = assoc->print;
3305     req.association = assoc;
3306
3307     (*assoc->init->bend_segment)(assoc->backend, &req);
3308
3309     return 0;
3310 }
3311
3312 static Z_APDU *process_ESRequest(association *assoc, request *reqb)
3313 {
3314     bend_esrequest_rr esrequest;
3315     const char *ext_name = "unknown";
3316
3317     Z_ExtendedServicesRequest *req =
3318         reqb->apdu_request->u.extendedServicesRequest;
3319     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3320
3321     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3322
3323     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3324     esrequest.stream = assoc->encode;
3325     esrequest.decode = assoc->decode;
3326     esrequest.print = assoc->print;
3327     esrequest.errcode = 0;
3328     esrequest.errstring = NULL;
3329     esrequest.association = assoc;
3330     esrequest.taskPackage = 0;
3331     esrequest.referenceId = req->referenceId;
3332
3333     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3334     {
3335         switch(esrequest.esr->taskSpecificParameters->which)
3336         {
3337         case Z_External_itemOrder:
3338             ext_name = "ItemOrder"; break;
3339         case Z_External_update:
3340             ext_name = "Update"; break;
3341         case Z_External_update0:
3342             ext_name = "Update0"; break;
3343         case Z_External_ESAdmin:
3344             ext_name = "Admin"; break;
3345
3346         }
3347     }
3348
3349     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3350
3351     resp->referenceId = req->referenceId;
3352
3353     if (esrequest.errcode == -1)
3354     {
3355         /* Backend service indicates request will be processed */
3356         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3357         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3358     }
3359     else if (esrequest.errcode == 0)
3360     {
3361         /* Backend service indicates request will be processed */
3362         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3363         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3364     }
3365     else
3366     {
3367         Z_DiagRecs *diagRecs =
3368             zget_DiagRecs(assoc->encode, esrequest.errcode,
3369                           esrequest.errstring);
3370         /* Backend indicates error, request will not be processed */
3371         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3372         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3373         resp->num_diagnostics = diagRecs->num_diagRecs;
3374         resp->diagnostics = diagRecs->diagRecs;
3375         if (log_request)
3376         {
3377             WRBUF wr = wrbuf_alloc();
3378             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3379             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3380             wrbuf_destroy(wr);
3381         }
3382
3383     }
3384     /* Do something with the members of bend_extendedservice */
3385     if (esrequest.taskPackage)
3386     {
3387         resp->taskPackage = z_ext_record_oid(
3388             assoc->encode, yaz_oid_recsyn_extended,
3389             (const char *)  esrequest.taskPackage, -1);
3390     }
3391     yaz_log(YLOG_DEBUG,"Send the result apdu");
3392     return apdu;
3393 }
3394
3395 int bend_assoc_is_alive(bend_association assoc)
3396 {
3397     if (assoc->state == ASSOC_DEAD)
3398         return 0; /* already marked as dead. Don't check I/O chan anymore */
3399
3400     return iochan_is_alive(assoc->client_chan);
3401 }
3402
3403
3404 /*
3405  * Local variables:
3406  * c-basic-offset: 4
3407  * c-file-style: "Stroustrup"
3408  * indent-tabs-mode: nil
3409  * End:
3410  * vim: shiftwidth=4 tabstop=8 expandtab
3411  */
3412